Patent Publication Number: US-2023139617-A1

Title: Electrical Connection Apparatus, Manufacturing Method, and Computer Device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application claims priority to Chinese Patent Application No. 202110977533.5, filed on Aug. 24, 2021, which is hereby incorporated by reference in its entirety. 
     TECHNICAL FIELD 
     This application relates to the field of electrical connection technologies, and in particular, to an electrical connection apparatus, a manufacturing method, and a computer device. 
     BACKGROUND 
     An electrical connection apparatus is an apparatus for electrically connecting two components. For example, an optical cage connector and a chip may be electrically connected by using the electrical connection apparatus. For another example, two chips may be electrically connected by using the electrical connection apparatus. 
     The electrical connection apparatus mainly includes a cable connector and a printed circuit board (PCB) in structure. The cable connector mainly includes a connecting terminal, a plurality of spring plates, and a plurality of cables. One part of each spring plate is located in the connecting terminal, and the other part extends from a bottom of the connecting terminal. One end of each cable extends into the connecting terminal, and is electrically connected to the spring plate. There are a plurality of contacts on a board surface of the printed circuit board. In this way, when the cable connector is assembled on the printed circuit board, the spring plate in the cable connector is abutted against the contact on the printed circuit board, to electrically connect the cable connector and the printed circuit board. 
     In application, the cable in the cable connector may be electrically connected to the optical cage connector, and the contact on the printed circuit board may be electrically connected to the chip mounted on the printed circuit board, to electrically connect the optical cage connector and the chip by using the electrical connection apparatus. 
     There is a contact electrical connection between the cable connector and the printed circuit board. Therefore, to ensure stability of the electrical connection between the cable connector and the printed circuit board, a fastener that can be used to tightly press the connecting terminal onto the printed circuit board is usually required. Currently, in most cases, a buckle (the buckle may also be referred to as a socket) is used as a fastener. Therefore, the electrical connection apparatus further includes a buckle. The buckle usually includes two parts: a first part and a second part. The first part and the second part are hinged, and the first part and the printed circuit board are fastened. When the cable connector is located on the printed circuit board, the second part of the buckle is pressed onto the cable connector, and is snap-fitted on the first part. In this way, the cable connector is tightly pressed onto the printed circuit board under the action of the buckle, so that the spring plate in the cable connector and the contact on the printed circuit board are in close contact. 
     When the cable connector is assembled on the printed circuit board, and when the cable connector is removed from the printed circuit board, the buckle needs to be opened, so that the second part of the buckle is lifted relative to the first part. It may be learned that sufficient space needs to be reserved around the buckle on the printed circuit board, to lift the second part of the buckle. Consequently, the buckle used to tightly press the cable connector onto the printed circuit board occupies relatively large space on the printed circuit board. 
     SUMMARY 
     This application provides an electrical connection apparatus, a manufacturing method, and a computer device, to resolve a problem, in a related technology, that a buckle used to tightly press a cable connector onto a printed circuit board occupies relatively large space on the printed circuit board. The technical solutions are as follows. 
     According to an aspect, an electrical connection apparatus is provided. The electrical connection apparatus includes a cable connector, a printed circuit board, and a fastened wall. The cable connector includes a connecting terminal and a plurality of first contacts. One part of each first contact is located in the connecting terminal, and the other part extends from the connecting terminal. The printed circuit board includes a substrate and a plurality of second contacts. The plurality of second contacts are located on a surface of the substrate. The fastened wall includes a plurality of sidewalls. The plurality of sidewalls are fastened to the substrate, and are located on at least two opposite sides of the plurality of second contacts. When the cable connector and the printed circuit board are fitted, the cable connector and the fastened wall are detachably fastened, and the first contact and the second contact are in close contact. 
     The cable connector and the fastened wall may be detachably fastened through snap-fitting, and snap-fitting of the cable connector and the fastened wall may be snap-fitting of the connecting terminal and the fastened wall or snap-fitting of a shielding can in the cable connector and the fastened wall. 
     In the solution shown in this application, the fastened wall used to tightly press the connecting terminal in the cable connector onto the printed circuit board includes the plurality of sidewalls, and has a simple structure. During assembly of the cable connector and the printed circuit board, the connecting terminal in the cable connector is moved downward from a direction directly above the fastened wall to a direction close to the printed circuit board, and when the connecting terminal is moved downward to the fastened wall, the cable connector and the fastened wall are fastened in a detachable manner. It may be learned that during assembly of the cable connector and the printed circuit board, an operation is always performed in a direction that is directly above the fastened wall and that is far away from the printed circuit board, and space, on the printed circuit board, around the fastened wall is not affected. Therefore, the fastened wall that serves a fastener for tightly pressing the cable connector onto the printed circuit board occupies relatively small space on the printed circuit board, and space on the printed circuit board can be saved. In addition, another component may be further arranged in the space, on the printed circuit board, around the fastened wall, so that a relatively large quantity of components may be mounted on the printed circuit board, to facilitate high-density development. 
     In a possible implementation, the plurality of sidewalls surround the plurality of second contacts, and the connecting terminal is located in annular space enclosed by the plurality of sidewalls. 
     In the solution shown in this application, the plurality of sidewalls may be divided into two parts. Some sidewalls are located on a first side of the second contacts, and the other sidewalls are located on a second side of the second contacts. The first side and the second side are opposite to each other. Alternatively, the plurality of sidewalls may be divided into three parts. Some sidewalls are located on a first side of the second contacts, some sidewalls are located on a second side of the second contacts, and the remaining sidewalls are located on a third side of the second contacts. The first side and the second side are opposite to each other, and the third side and the first side are adjacent to each other. Alternatively, the plurality of sidewalls may be divided into four parts. Some sidewalls are located on a first side of the second contacts, some sidewalls are located on a second side of the second contacts, some sidewalls are located on a third side of the second contacts, and the remaining sidewalls are located on a fourth side of the second contacts. The first side and the second side are opposite to each other, the third side and the first side are adjacent to each other, and the fourth side and the third side are opposite to each other. 
     In a possible implementation, the plurality of sidewalls are head-to-tail connected to form the annular space. 
     In a possible implementation, the fastened wall further includes a plurality of elastic plates, each elastic plate is connected to the sidewall, and the elastic plate can rotate around a connection point relative to the connected sidewall; and the elastic plate is configured to enable the connecting terminal and the fastened wall to be snap-fitted. 
     In the solution shown in this application, the connecting terminal and the fastened wall may be snap-fitted by fitting a positioning protrusion and a positioning hole of the elastic plate, or the connecting terminal and the fastened wall may be snap-fitted by pressing the connecting terminal into the fastened wall by using the elastic plate. The connecting terminal and the fastened wall are snap-fitted, to facilitate automatic assembly of the connecting terminal and the fastened wall. In this way, assembly efficiency can be improved, and screw-free assembly can be implemented. 
     In a possible implementation, a first end of the elastic plate in a height direction is connected to the sidewall, and a second end is far away from the sidewall; and each elastic plate is provided with a first positioning hole, there are a plurality of first positioning protrusions on a side surface of the connecting terminal, and the first positioning protrusion is located in the first positioning hole. 
     In the solution shown in this application, in the manner of fitting the positioning protrusion and the positioning hole of the elastic plate, when the connecting terminal is moved downward from the direction directly above the fastened wall to a direction close to the fastened wall, if the connecting terminal continues to be moved downward when being in contact with the second end that is of the elastic plate and that is far away from the connected sidewall during downward movement, the elastic plate is extended out of a frame of the fastened wall, to continue to perform downward movement. When the first positioning protrusion of the connecting terminal is located in the first positioning hole on the fastened wall during downward movement, downward movement may be stopped. In this case, the connecting terminal is stably snap-fitted into the fastened wall. When the first positioning protrusion of the connecting terminal is located in the first positioning hole on the fastened wall during downward movement of the connecting terminal, the connecting terminal may continue to be moved downward to a limit position. After external force exerted for controlling the connecting terminal to move downward is removed, the connecting terminal moves upward under elastic force of the first contact. When the first positioning protrusion is in contact with an upper edge of the first positioning hole during upward movement, the connecting terminal is stably snap-fitted into the fastened wall. 
     In a possible implementation, the second end that is of each elastic plate and that is far away from the connected sidewall is bent out of the frame of the fastened wall. 
     In the solution shown in this application, in the foregoing structure of the elastic plate, during downward movement of the connecting terminal, the first positioning protrusion can gradually extend the elastic plate out of the frame of the fastened wall, and the connecting terminal is smoothly moved downward to the fastened wall. 
     In a possible implementation, an end face that is of each first positioning protrusion and that is far away from the side surface on which the first positioning protrusion is located includes an inclined surface, an intersection line between a plane on which the inclined surface is located and the side surface is located below the first positioning protrusion, and there is the direction close to the printed circuit board below the first positioning protrusion. 
     In the solution shown in this application, in the foregoing structure of the first positioning protrusion, during downward movement of the connecting terminal, the first positioning protrusion can gradually extend the elastic plate out of the frame of the fastened wall, and the connecting terminal is smoothly moved downward to the fastened wall. 
     In a possible implementation, each elastic plate includes a parent body and a folding body formed through folding, and the parent body is connected to the sidewall; and the folding body of each elastic plate is located on an upper surface that is of the connecting terminal and that is far away from the substrate. 
     In the solution shown in this application, during downward movement of the connecting terminal from the direction directly above the fastened wall to the direction close to the fastened wall, when the connecting terminal is in contact with the elastic plate, the elastic plate can be extended out of the frame of the fastened wall, so that the connecting terminal continues to move downward. When the folding body of the elastic plate is located on the upper surface of the connecting terminal during downward movement, the connecting terminal is snap-fitted into the fastened wall. 
     In a possible implementation, there are a plurality of first positioning rods at a bottom of the connecting terminal, there are a plurality of first positioning holes on the substrate, and the first positioning rod is located in the first positioning hole. 
     In the solution shown in this application, during downward movement of the connecting terminal from the direction directly above the fastened wall to the direction close to the fastened wall, the first positioning rod first enters the first positioning hole. In this way, precision of aligning the connecting terminal and the printed circuit board can be improved, and efficiency of assembly between the cable connector and the printed circuit board can be improved. 
     In a possible implementation, the cable connector further includes a shielding can, and the shielding can is located on a surface that is of the connecting terminal and that is far away from the substrate, and is snap-fitted with the fastened wall. 
     In the solution shown in this application, the shielding can be used to reduce interference caused by a signal of a surrounding component to a signal transmitted in the electrical connection apparatus, and may be further used to reduce interference caused by the signal transmitted in the electrical connection apparatus to a signal of another component. 
     In addition, when the shielding can and the fastened wall are snap-fitted, the connecting terminal can be tightly pressed onto the printed circuit board. For example, there may be no snap-fitting relationship between the connecting terminal and the fastened wall, and the connecting terminal can still be tightly pressed onto the printed circuit board when the shielding can and the fastened wall are snap-fitted. For another example, there is a snap-fitting relationship between the connecting terminal and the fastened wall, and there is a snap-fitting relationship between the shielding can and the fastened wall, so that the connecting terminal can be firmly pressed onto the printed circuit board. 
     In a possible implementation, the shielding can is provided with a second positioning hole, there is a second positioning protrusion on the sidewall, and the second positioning protrusion is located in the second positioning hole. 
     In the solution shown in this application, the shielding can and the fastened wall may be snap-fitted by using a fitting relationship between the positioning protrusion and the positioning hole. 
     In a possible implementation, the shielding can and the connecting terminal are fastened. 
     In the solution shown in this application, in a solution in which there is no snap-fitting relationship between the connecting terminal and the fastened wall, there is a fastening relationship between the shielding can and the connecting terminal. In this case, during assembly of the cable connector and the printed circuit board, the connecting terminal does not need to be pressed into the fastened wall, and the connecting terminal to which the shielding can is fastened is directly moved downward to the fastened wall, to tightly press the connecting terminal onto the printed circuit board by snap-fitting the shielding can and the fastened wall. This facilitates automatic assembly of the cable connector and the printed circuit board. 
     In a solution in which there is a snap-fitting relationship between the connecting terminal and the fastened wall, the connecting terminal and the fastened wall are snap-fitted, and the shielding can and the fastened wall are snap-fitted, so that the connecting terminal can be firmly pressed onto the printed circuit board. 
     In a possible implementation, the electrical connection apparatus further includes a dustproof cover; and when the cable connector and the printed circuit board are not fitted, the dustproof cover covers the plurality of second contacts in a direction far away from the substrate. 
     In the solution shown in this application, when the cable connector and the printed circuit board do not need to be electrically connected, the cable connector and the printed circuit board do not need to be fitted, and the dustproof cover may cover the plurality of second contacts in the direction far away from the substrate, to reduce dust accumulation on the second contacts and keep the second contacts clean. 
     In a possible implementation, there is a clamping groove on a side part of the dustproof cover, the clamping groove and the sidewall are clamped, and there is a gap between the dustproof cover and the second contact. 
     In the solution shown in this application, the clamping groove of the dustproof cover and the sidewall of the fastened wall are clamped. In this way, the dustproof cover and the fastened wall can be detachably fastened. In addition, there can be a gap between the dustproof cover and the second contact, and the dustproof cover and the second contact are not in contact with each other, to prevent the dustproof cover from wearing the second contact and protect the second contact. 
     According to another aspect, a method for manufacturing an electrical connection apparatus is provided, and includes: fastening a plurality of first contacts to a connecting terminal, where one part of each first contact extends from the connecting terminal, to obtain a cable connector; fastening a plurality of second contacts to a surface of a substrate, to obtain a printed circuit board; fastening a plurality of sidewalls of a fastened wall to the substrate, where the plurality of sidewalls are located on at least two opposite sides of the plurality of second contacts; and when the cable connector and the printed circuit board are fitted, fastening the cable connector and the fastened wall in a detachable manner, where the first contact and the second contact are in close contact. 
     In the solution shown in this application, the fastened wall of the processed electrical connection apparatus is used to tightly press the connecting terminal in the cable connector onto the printed circuit board, includes the plurality of sidewalls, and has a simple structure. During assembly of the cable connector and the printed circuit board, the connecting terminal in the cable connector is moved downward from a direction directly above the fastened wall to a direction close to the printed circuit board, and when the connecting terminal is moved downward to the fastened wall, the cable connector and the fastened wall are fastened in the detachable manner. It may be learned that during assembly of the cable connector and the printed circuit board, an operation is always performed in a direction that is directly above the fastened wall and that is far away from the printed circuit board, and space, on the printed circuit board, around the fastened wall is not affected. Therefore, the fastened wall that serves a fastener for tightly pressing the cable connector onto the printed circuit board occupies relatively small space on the printed circuit board, and space on the printed circuit board can be saved. In addition, another component may be further arranged in the space, on the printed circuit board, around the fastened wall, so that a relatively large quantity of components may be mounted on the printed circuit board, to facilitate high-density development. 
     In a possible implementation, the method for manufacturing an electrical connection apparatus is applied to the foregoing electrical connection apparatus. 
     In a possible implementation, the method further includes: connecting each of a plurality of elastic plates to the sidewall. 
     The elastic plate can rotate around a connection point relative to the connected sidewall, and is configured to enable the connecting terminal and the fastened wall to be snap-fitted. 
     In the solution shown in this application, the elastic plate and the sidewall may be integrally formed to implement connection. For example, a plurality of strip-shaped slits are disposed on the sidewall in a height direction, and the elastic plate is formed two adjacent strip-shaped slits. Alternatively, the elastic plate may be connected to the sidewall through welding. 
     In a possible implementation, the connecting each of a plurality of elastic plates to the sidewall includes: connecting a first end of each of the plurality of elastic plates in the height direction to the sidewall, where a second end of each elastic plate is far away from the sidewall, where each elastic plate is provided with a first positioning hole, and there are a plurality of first positioning protrusions on a side surface of the connecting terminal; and the fastening the cable connector and the fastened wall in a detachable manner includes: mounting the first positioning protrusion in the first positioning hole. 
     In the solution shown in this application, the connecting terminal may be snap-fitted into the fastened wall by fitting the positioning protrusion and the positioning hole of the elastic plate. In this manner of implementing snap-fitting by fitting the positioning protrusion and the positioning hole, it is relatively convenient to assemble the connecting terminal on the printed circuit board and detach the connecting terminal from the printed circuit board, and efficiency of assembly and detachment between the cable connector and the printed circuit board may be improved. 
     In a possible implementation, each elastic plate includes a parent body and a folding body formed through folding; the connecting each of a plurality of elastic plates to the sidewall includes: connecting the parent body of each elastic plate to the sidewall; and the fastening the cable connector and the fastened wall in a detachable manner includes: pressing the folding body of each elastic plate onto an upper surface that is of the connecting terminal and that is far away from the substrate. 
     In the solution shown in this application, the connecting terminal and the fastened wall may be snap-fitted by pressing the elastic plate onto the upper surface that is of the connecting terminal and that is far away from the substrate. In this snap-fitting manner, it is relatively convenient to mount the cable connector on the printed circuit board, and efficiency of assembly between the cable connector and the printed circuit board may be improved. 
     In a possible implementation, the cable connector further includes a shielding can, and the method further includes: covering a surface that is of the connecting terminal and that is far away from the substrate with the shielding can, and snap-fitting the shielding can and the fastened wall. 
     In the solution shown in this application, a process of covering the connecting terminal with the shielding can may be performed before the connecting terminal is mounted into the fastened wall or after the connecting terminal is mounted into the fastened wall. The shielding can reduce interference caused by a surrounding component to a signal transmitted in the electrical connection apparatus, and may further reduce interference caused by the signal transmitted in the electrical connection apparatus to another component. 
     In a possible implementation, the electrical connection apparatus further includes a dustproof cover, and the method further includes: when the cable connector and the printed circuit board are not fitted, covering the plurality of second contacts with the dustproof cover in a direction far away from the substrate. 
     In the solution shown in this application, when the cable connector and the printed circuit board do not need to be electrically connected, in other words, when the cable connector and the printed circuit board are not fitted, the dustproof cover covers the plurality of second contacts in the direction far away from the substrate, to reduce dust accumulation on the second contacts and keep the second contacts clean. 
     In a possible implementation, there is a clamping groove on a side part of the dustproof cover; and the covering the plurality of second contacts with the dustproof cover in a direction far away from the substrate, includes: placing the dustproof cover above the plurality of second contacts in the direction far away from the substrate, and clamping the clamping groove on the sidewall, where there is a gap between the dustproof cover and the second contact. 
     In the solution shown in this application, the clamping groove of the dustproof cover and the sidewall of the fastened wall are clamped. In this way, the dustproof cover and the fastened wall can be detachably fastened. In addition, there can be a gap between the dustproof cover and the second contact, and the dustproof cover and the second contact are not in contact with each other, to prevent the dustproof cover from wearing the second contact and protect the second contact. 
     According to another aspect, a computer device is provided. The computer device includes the foregoing electrical connection apparatus. 
     In the solution shown in this application, a fastened wall of the electrical connection apparatus included in the computer device is used to tightly press a connecting terminal in a cable connector onto a printed circuit board, includes a plurality of sidewalls, and has a simple structure. During assembly of the cable connector and the printed circuit board, the connecting terminal in the cable connector is moved downward from a direction directly above the fastened wall to a direction close to the printed circuit board, and when the connecting terminal is moved downward to the fastened wall, the cable connector and the fastened wall are fastened in a detachable manner. It may be learned that during assembly of the cable connector and the printed circuit board, an operation is always performed in a direction that is directly above the fastened wall and that is far away from the printed circuit board, and space, on the printed circuit board, around the fastened wall is not affected. Therefore, the fastened wall that serves a fastener for tightly pressing the cable connector onto the printed circuit board occupies relatively small space on the printed circuit board, and space on the printed circuit board can be saved. In addition, another component may be further arranged in the space, on the printed circuit board, around the fastened wall, so that a relatively large quantity of components may be mounted on the printed circuit board, to facilitate high-density development. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a schematic diagram of an explosive structure of an electrical connection apparatus according to this application; 
         FIG.  2    is a schematic diagram of an explosive structure of an electrical connection apparatus according to this application; 
         FIG.  3    is a schematic diagram of a structure that exists after a printed circuit board and a fastened wall of an electrical connection apparatus are fastened according to this application; 
         FIG.  4    is a schematic diagram of a structure of an electrical connection apparatus according to this application; 
         FIG.  5    is a schematic diagram of a structure of a connecting terminal in an electrical connection apparatus according to this application; 
         FIG.  6    is a schematic diagram of a process of fitting a first contact and a second contact in an electrical connection apparatus according to this application; 
         FIG.  7    is a schematic diagram of a process of fitting a first contact and a second contact in an electrical connection apparatus according to this application; 
         FIG.  8    is a schematic diagram of a structure of an elastic plate in an electrical connection apparatus according to this application; 
         FIG.  9    is a schematic diagram of a structure of a fastened wall in an electrical connection apparatus according to this application; 
         FIG.  10    is a schematic diagram of a cross-sectional structure of an electrical connection apparatus according to this application; 
         FIG.  11    is a schematic diagram of an explosive structure of an electrical connection apparatus according to this application; 
         FIG.  12    is a schematic diagram of an explosive structure of an electrical connection apparatus according to this application; and 
         FIG.  13    is a schematic diagram of a structure of an electrical connection apparatus according to this application. 
       REFERENCE NUMERALS 
         1 : Cable connector;  11 : Connecting terminal;  12 : First contact;  13 : Cable; and  14 : Shielding can; and 
         11   a : Side surface;  111 : First positioning protrusion;  111   a : Inclined surface;  112 : First positioning rod; and  141 : Second positioning hole. 
         2 : Printed circuit board;  21 : Substrate;  22 : Second contact;  211 : First positioning hole; and  212 : Second positioning hole. 
         3 : Fastened wall;  31 : Sidewall;  32 : Elastic plate;  311 : Second positioning protrusion;  312 . Second positioning rod;  313 : Opening;  321 : First positioning hole;  322 : Parent body; and  323 : Folding body. 
         4 : Dustproof cover;  41 : Clamping groove;  42 : Handle structure; and  43 : Third positioning rod. 
     
    
    
     DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS 
     An embodiment of this application provides an electrical connection apparatus. The electrical connection apparatus is mainly configured to electrically connect two components, for example, may electrically connect an optical cage connector and a chip, and may further electrically connect two chips. Specific application of the electrical connection apparatus is not limited in this embodiment, and the electrical connection apparatus may be applied to an electrical connection between two components in any field. The electrical connection may be used for signal transmission or electric power transmission. To clearly describe an application scenario of the electrical connection apparatus, a main structure of the electrical connection apparatus may be first described. 
       FIG.  1    is a schematic diagram of an explosive structure of the electrical connection apparatus. It may be learned from  FIG.  1    that the electrical connection apparatus mainly includes a cable connector  1  and a printed circuit board  2 . The cable connector  1  may include a connecting terminal  11 , first contacts  12 , and cables  13 . There are a plurality of first contacts  12  and a plurality of cables  13 . The first contact  12  is electrically connected to the cable  13 . The printed circuit board  2  includes a substrate  21  and second contacts  22 . There are a plurality of second contacts  22  laid on a surface of the substrate  21 . As shown in  FIG.  1   , when the cable connector  1  is located on a surface of the printed circuit board  2 , the first contact  12  is in contact with the second contact  22 , so that the cable connector  1  is electrically connected to the printed circuit board  2 . 
     During application of the electrical connection apparatus, in a case, the electrical connection apparatus may be configured to electrically connect two different components, for example, electrically connect an optical cage connector and a chip. An end that is of the cable  13  and that is far away from the connecting terminal  11  may be electrically connected to a connector in the optical cage connector, and the chip may be electrically connected to the second contact  22  on the printed circuit board  2 . In this way, the optical cage connector may be electrically connected to the chip by using the electrical connection apparatus. The cable connector  1 , the optical cage connector, and the chip may be mounted on a substrate of a same printed circuit board, or may be mounted on substrates of different printed circuit boards. 
     During application of the electrical connection apparatus, in another case, the electrical connection apparatus may be configured to electrically connect two same components, for example, electrically connect two chips. The two chips may be electrically connected by using two electrical connection apparatuses, which may be denoted as a first electrical connection apparatus and a second electrical connection apparatus. A cable  13  of the first electrical connection apparatus is electrically connected to a cable  13  of the second electrical connection apparatus. A second contact  22  of a printed circuit board  2  of the first electrical connection apparatus is electrically connected to one of the chips, and a second contact  22  of a printed circuit board  2  of the second electrical connection apparatus is electrically connected to the other chip. In this way, the two chips may be electrically connected by using the two electrical connection apparatuses. The first electrical connection apparatus and the second electrical connection apparatus may include a same cable  13 , that is, one end of the cable  13  is fastened in a connecting terminal  11  of the first electrical connection apparatus, and the other end of the cable  13  is fastened in a connecting terminal ii of the second electrical connection apparatus. The first electrical connection apparatus and the second electrical connection apparatus may include a same printed circuit board  2 , or may certainly include different printed circuit boards  2 . 
     A manner in which two components are electrically connected by using the electrical connection apparatus achieves a faster transmission speed and less loss than a manner in which two components are electrically connected by using a flat cable on a printed circuit board. 
     The foregoing describes the application scenario of the electrical connection apparatus, and the following describes a structure of the electrical connection apparatus in detail. 
     As described above, when the cable connector  1  of the electrical connection apparatus is assembled on the printed circuit board  2 , the first contact  12  of the cable connector  1  is in contact with the second contact  22  of the printed circuit board  2 , so that the cable connector  1  is electrically connected to the printed circuit board  2 . 
     At least one of the first contact  12  and the second contact  22  may be elastic. For example, the first contact  12  is elastic, and may be specifically a conductive spring plate, a conductive elastomer, or the like. The second contact  22  is a conductive plate. For another example, the first contact  12  is a conductive plate. The second contact  22  is elastic, and may be specifically a conductive spring plate or a conductive elastomer. For another example, both the first contact  12  and the second contact  22  are elastic, and may be specifically conductive spring plates. Certainly, both the first contact  12  and the second contact  22  may be conductive plates. 
     Specific structures and shapes of the first contact  12  and the second contact  22  are not limited in this embodiment, and may be flexibly selected based on an actual situation. For ease of description, the figure in this embodiment uses an example in which the first contact  12  is a conductive spring plate and the second contact  22  is a conductive plate. 
     It may be learned that the electrical connection apparatus implements an electrical connection through flexible contact. Therefore, the electrical connection apparatus may also be referred to as a flexible electrical connection apparatus or a contact electrical connection apparatus. 
     As described above, the electrical connection apparatus includes the cable connector  1 . The cable connector  1  includes the cable  13 , and therefore the cable connector  1  may also be referred to as a cable connector. As described above, the cable connector  1  includes not only the plurality of cables  13 , but also the connecting terminal  11  and the plurality of first contacts  12 . 
     The connecting terminal  11  is a main structure of the cable connector  1 . Each first contact  12  may also be referred to as a conductive pin. 
     As shown in  FIG.  1   , one part of the first contact  12  is fixedly located in the connecting terminal  11 , and the other part extends from the connecting terminal  11 . For example, the plurality of first contacts  12  extend from a bottom of the connecting terminal  11 . The bottom of the connecting terminal  11  may be a position that is in contact with the printed circuit board  2 . The plurality of first contacts  12  may be arranged in an array at the bottom of the connecting terminal  11 . For example, as shown in  FIG.  1   , the plurality of first contacts  12  may be arranged in two rows at the bottom of the connecting terminal  11 . 
     Further referring to  FIG.  1   , one end of each of the plurality of cables  13  is inserted into the connecting terminal ii and electrically connected to the first contact  12 . One end of each cable  13  may be welded to the connecting terminal  11  and electrically connected to the first contact  12  in the connecting terminal  11 . 
     Based on the foregoing description, a structure of the cable connector  1  in the electrical connection apparatus may be as follows: The cable connector  1  includes the connecting terminal  11 , the plurality of first contacts  12 , and the plurality of cables  13 . One part of each first contact  12  is fastened in the connecting terminal  11 , and the other part extends from the bottom of the connecting terminal  11 , and is configured to be electrically connected to the printed circuit board  2 . One end of each cable  13  is inserted into the connecting terminal  11  and electrically connected to the first contact  12 . 
     As described above, the electrical connection apparatus further includes the printed circuit board  2 . The printed circuit board  2  may be a mainboard of a communications device in which the electrical connection apparatus is located. 
     As shown in  FIG.  1   , the printed circuit board  2  may include the substrate  21  and the plurality of second contacts  22 . Each second contact  22  may also be referred to as a conductive pin, and the plurality of second contacts  22  may also be referred to as golden fingers. 
     As shown in  FIG.  1   , the plurality of second contacts  22  are fixedly located on the surface of the substrate  21 . For example, the plurality of second contacts  22  may be fixedly located on an upper surface of the substrate  21 . For another example, the plurality of second contacts  22  may be located on a lower surface of the substrate  21 . The plurality of second contacts  22  may be arranged in an array on the surface of the substrate  21 . For example, as shown in  FIG.  1   , the plurality of second contacts  22  may be arranged in two rows on the surface of the substrate  21 . 
     The cable connector  1  and the printed circuit board  2  are electrically connected when the first contact  12  is in contact with the second contact  22 . Therefore, a manner of arranging the plurality of first contacts  12  corresponds to a manner of arranging the plurality of second contacts  22 . It should be noted that the manner of arranging the plurality of first contacts  12  and the manner of arranging the plurality of second contacts  22  in  FIG.  1    are merely used as examples, and constitute no specific limitation. 
     In this way, when the cable connector  1  and the printed circuit board  2  are fitted, in other words, when the cable connector  1  is assembled on the printed circuit board  2 , the first contact  12  in the cable connector  1  is in contact with the second contact  22  on the printed circuit board  2 , so that the cable connector  1  and the printed circuit board  2  are electrically connected. 
     The electrical connection between the cable connector  1  and the printed circuit board  2  is flexible contact, and therefore a pressing structure is required to tightly press the cable connector  1  onto the board surface of the printed circuit board  2 , so that the first contact  12  in the cable connector  1  and the second contact  22  on the printed circuit board  2  are in close contact, to improve stability of the electrical connection between the cable connector  1  and the printed circuit board  2 . Close contact means that the first contact  12  and the second contact  22  are in close contact, and there is acting force between the first contact  12  and the second contact  22 . 
     Correspondingly, as shown in  FIG.  2   , the electrical connection apparatus further includes a fastened wall  3 , and the fastened wall  3  includes a plurality of sidewalls  31 . The plurality of sidewalls  31  are fastened to the substrate  21  of the printed circuit board  2 , and the plurality of sidewalls  31  are located on two opposite sides of the plurality of second contacts  22 . 
     The sidewall  31  and the substrate  21  may be fastened through welding, by using adhesive, by using a screw, through press-fitting, or the like. 
     There may be at least the following several manners in which the plurality of sidewalls  31  are located on the two opposite sides of the second contacts  22 . 
     For example, a manner may be as follows: The plurality of sidewalls  31  may be divided into two parts. Some sidewalls  31  are located on a first side of the second contacts  22 , and the other sidewalls  31  are located on a second side of the second contacts  22 . The first side and the second side are opposite to each other. 
     When the cable connector  1  and the printed circuit board  2  are fitted, the connecting terminal  11  in the cable connector  1  is located in the fastened wall  3 . This may be understood as that the connecting terminal is located between the two parts of sidewalls  31 . The cable connector  1  and the fastened wall  3  may be fastened in a detachable manner. After the cable connector  1  and the fastened wall  3  are fastened, the first contact  12  and the second contact  22  are in close contact. 
     For another example, another manner may be as follows: The plurality of sidewalls  31  may be divided into three parts. Some sidewalls  31  are located on a first side of the second contacts  22 , some sidewalls  31  are located on a second side of the second contacts  22 , and the remaining sidewalls  31  are located on a third side of the second contacts  22 . The first side and the second side are opposite to each other, and the third side and the first side are adjacent to each other. 
     When the cable connector  1  and the printed circuit board  2  are fitted, the connecting terminal  11  in the cable connector  1  is located in the fastened wall  3 . This may be understood as that the connecting terminal is located between the three parts of sidewalls  31 . The cable connector  1  and the fastened wall  3  may be fastened in a detachable manner. After the cable connector  1  and the fastened wall  3  are fastened, the first contact  12  and the second contact  22  are in close contact. 
     For another example, another manner may be as follows: The plurality of sidewalls  31  may be divided into four parts. Some sidewalls  31  are located on a first side of the second contacts  22 , some sidewalls  31  are located on a second side of the second contacts  22 , some sidewalls  31  are located on a third side of the second contacts  22 , and the remaining sidewalls  31  are located on a fourth side of the second contacts  22 . The first side and the second side are opposite to each other, the third side and the first side are adjacent to each other, and the fourth side and the third side are opposite to each other. In this manner, the plurality of sidewalls  31  surround the plurality of second contacts  22 , and the plurality of sidewalls  31  enclose annular space  30 . 
     When the cable connector  1  and the printed circuit board  2  are fitted, the connecting terminal  11  in the cable connector  1  is located in the fastened wall  3 . This may be understood as that the connecting terminal is located in the annular space  30  enclosed by the four parts of sidewalls  31 . The cable connector  1  and the fastened wall  3  may be fastened in a detachable manner. After the cable connector  1  and the fastened wall  3  are fastened, the first contact  12  and the second contact  22  are in close contact. 
     For cases in which the plurality of sidewalls  31  are divided into three parts and four parts, there may be or may not be a connection relationship between two adjacent sidewalls. If there is a connection relationship, the plurality of sidewalls  31  may be head-to-tail connected. 
     In this embodiment, a quantity of sidewalls  31  included in the fastened wall  3  and a length of each sidewall  31  are not limited, and a manner of arranging the sidewalls  31  around the plurality of second contacts  22  is also not limited, and may be flexibly designed. 
     Based on the foregoing description, the fastened wall  3  used to tightly press the connecting terminal  11  in the cable connector  1  onto the printed circuit board  2  includes the plurality of sidewalls  31 , and has a simple structure. During assembly of the cable connector  1  and the printed circuit board  2 , the connecting terminal  11  in the cable connector  1  is moved downward from a direction directly above the fastened wall  3  to a direction close to the printed circuit board  2 , and when the connecting terminal is moved downward to the fastened wall  3 , the cable connector  1  and the fastened wall  3  are fastened in the detachable manner. It may be learned that during assembly of the cable connector  1  and the printed circuit board  2 , an operation is always performed in a direction that is directly above the fastened wall  3  and that is far away from the printed circuit board  2 , and space, on the printed circuit board  2 , around the fastened wall  3  is not affected. Therefore, the fastened wall  3  that serves a fastener for tightly pressing the cable connector  1  onto the printed circuit board  2  occupies relatively small space on the printed circuit board  2 , and space on the printed circuit board  2  can be saved. In addition, another component may be further arranged in the space, on the printed circuit board  2 , around the fastened wall  3 , so that a relatively large quantity of components may be mounted on the printed circuit board  2 , to facilitate high-density development. 
     For ease of description, in the accompanying drawings in this embodiment, an example in which the plurality of sidewalls  31  of the fastened wall  3  are head-to-tail connected, to form the annular space  30  may be used. Referring to  FIG.  2   , the fastened wall  3  may also be referred to as an enclosure frame. The annular space  30  matches the connecting terminal  11 , and is used to accommodate the connecting terminal  11 . 
     A contour shape of the fastened wall  3  matches a contour shape of the connecting terminal  11 . For example, if the contour shape of the connecting terminal  11  is a rectangle, the fastened wall  3  may be a quadrilateral frame. 
     In an example, the quantity of sidewalls  31  is related to the shape of the fastened wall  3 . For example, if the fastened wall  3  is a quadrilateral frame, there may be four sidewalls  31 . A size of each sidewall  31  is also related to the shape of the fastened wall  3 . For example, if the fastened wall  3  is a rectangle, in the four sidewalls  31 , two sidewalls  31  may be equal in size, and the other two sidewalls  31  may be equal in size. 
     The quantity of sidewalls  31  and the size of each sidewall  31  are not limited in this embodiment, and may be flexibly designed. 
     In an example, when the connecting terminal  11  is located in the annular space  30  of the fastened wall  3 , to avoid the plurality of cables  13 , correspondingly, as shown in  FIG.  2   , there may be an opening  313  on the sidewall  31 . A length of the opening  313  in a length direction of the sidewall  31  matches a total width of the plurality of cables  13 . For example, the length of the opening  313  is greater than the total width of the plurality of cables  13 . In this way, when the connecting terminal  11  is located in the annular space  30  of the fastened wall  3 , the plurality of cables  13  connected to the connecting terminal  11  may pass through the opening  313  on the sidewall  31  and extend distally. 
     In an example, the opening  313  may be disposed on one of the sidewalls  31  of the fastened wall  3 . As shown in  FIG.  2   , the opening  313  may be disposed on each of two opposite sidewalls  31  of the fastened wall  3 . Alternatively, the opening  313  may be disposed on each sidewall  31  of the fastened wall  3 . A specific position of the opening  313  is not limited in this embodiment, and may be flexibly designed. 
     As shown in  FIG.  3   , bottoms of the plurality of sidewalls  31  in a height direction are fastened to the substrate  21  of the printed circuit board  2 , and the plurality of sidewalls  31  surround the plurality of second contacts  22 . 
     When the cable connector  1  and the printed circuit board  2  need to be fitted, as shown in  FIG.  4   , the connecting terminal  11  in the cable connector  1  may be placed in the annular space  30  of the fastened wall  3 , and the cable connector  1  and the fastened wall  3  are fastened in the detachable manner, so that the first contact  12  in the cable connector  1  and the second contact  22  on the fastened wall  3  are in close contact. 
     There are a plurality of manners of detachably fastening the cable connector  1  and the fastened wall  3 . For example, the cable connector  1  and the fastened wall  3  may be detachably fastened through snap-fitting. For another example, the cable connector  1  and the fastened wall  3  may be detachably fastened by using a screw. An example in which the cable connector  1  and the printed circuit board  2  are detachably fastened through snap-fitting may be used below. 
     Snap-fitting of the cable connector  1  and the fastened wall  3  may be snap-fitting of the connecting terminal  11  in the cable connector  1  and the fastened wall  3  shown in  FIG.  2   , snap-fitting of a shielding can  14  in the cable connector  1  and the fastened wall  3  shown in  FIG.  11   , or snap-fitting of the connecting terminal  11  and the fastened wall  3  and snap-fitting of a shielding can  14  and the fastened wall  3  in  FIG.  11   . Snap-fitting of the cable connector  1  and the fastened wall  3  is described below in detail. 
     Based on the foregoing description, the fastened wall  3  in the electrical connection apparatus has a simple structure, and includes the plurality of sidewalls  31  that are head-to-tail connected. The fastened wall  3  is fastened to the printed circuit board  2 , and occupies relatively small space on the printed circuit board  2 , and therefore the space on the printed circuit board  2  can be saved. In addition, another component may be further arranged in the space, on the printed circuit board  2 , around the fastened wall  3 , to facilitate high-density development of the printed circuit board  2 . 
     When the cable connector  1  is assembled on the printed circuit board  2 , to improve precision of aligning the first contact  12  in the cable connector  1  and the second contact  22  on the printed circuit board  2 , correspondingly, as shown in  FIG.  2   , there are a plurality of first positioning rods  112  at the bottom of the connecting terminal  11 . For example, as shown in  FIG.  1   , there may be two first positioning rods  112 , and the two first positioning rods  112  may be distributed at directly opposite positions, or may be diagonally distributed. This is not limited in this embodiment. 
     As shown in  FIG.  2   , there is a first positioning hole  211  that matches the first positioning rod  112  on the substrate  21 . A quantity of first positioning holes  211  is equal to a quantity of first positioning rods  112 , and the first positioning hole  211  is in a one-to-one correspondence with the first positioning rod  112 . 
     In this way, in a process of assembling the cable connector  1  on the printed circuit board  2 , the first positioning rod  112  of the connecting terminal  11  is first inserted into the first positioning hole  211  on the substrate  21 , to implement pre-positioning, and then the cable connector  1  and the fastened wall  3  are snap-fitted. In this way, the precision of aligning the first contact  12  and the second contact  22  may be improved. 
     The first positioning rod  112  and the first positioning hole  211  are fitted, so that the precision of aligning the first contact  12  and the second contact  22  can be improved, and a speed of assembling the cable connector  1  and the printed circuit board  2  can be increased, to facilitate batch assembly and improve assembly efficiency. 
     In this embodiment of this application, the quantity of first positioning rods  112  is not limited, and distribution of the plurality of first positioning rods  112  is also not limited, provided that the connecting terminal  11  can be pre-positioned on the surface of the substrate  21 . 
     The first positioning rod  112  and the first positioning hole  211  may be interchanged. For example, there may be a positioning hole at the bottom of the connecting terminal  11 , and there is a positioning rod on the substrate  21 . Whether the positioning rod is located on the connecting terminal  11  or the substrate  21  is not limited in this application, provided that the connecting terminal  11  can be pre-positioned on the surface of the substrate  21 . 
     Similarly, to improve precision of assembling the fastened wall  3  and the substrate  21  and increase an assembly speed, correspondingly, as shown in  FIG.  2   , there are a plurality of second positioning rods  312  at a bottom of the fastened wall  3 . For example, as shown in  FIG.  2   , there may be two second positioning rods  312 . There is one second positioning rod  312  on each of bottoms of two adjacent sidewalls  31  of the fastened wall  3 . The two second positioning rods  312  may be located at directly opposite positions, may be diagonally located, as shown in  FIG.  2   , or the like. This is not limited in this embodiment. 
     As shown in  FIG.  2   , there is a second positioning hole  212  that matches the second positioning rod  312  on the substrate  21 . A quantity of second positioning holes  212  is equal to a quantity of second positioning rods  312 , and the second positioning hole  212  is in a one-to-one correspondence with the second positioning rod  312 . 
     In this way, before the bottom of the fastened wall  3  and the substrate  21  are fastened, the second positioning rod  312  on the fastened wall  3  may be first inserted into the second positioning hole  212  on the substrate  21 , to implement pre-positioning, and then the fastened wall  3  and the substrate  21  are fastened. 
     In this embodiment of this application, the quantity of second positioning rods  312  is not limited, and distribution of the plurality of second positioning rods  312  is also not limited, provided that the fastened wall  3  can be pre-positioned on the surface of the substrate  21 . 
     The second positioning rod  312  and the second positioning hole  212  may be interchanged. For example, there may be a positioning hole at the bottom of the fastened wall  3 , and there is a positioning rod on the substrate  21 . Whether the positioning rod is located on the fastened wall  3  or the substrate  21  is not limited in this application, provided that the fastened wall  3  can be pre-positioned on the surface of the substrate  21 . 
     As described above, snap-fitting of the cable connector  1  and the fastened wall  3  may be that the connecting terminal  11  is snap-fitted into the fastened wall  3 . For example, as shown in  FIG.  2   , the fastened wall  3  may include a plurality of elastic plates  32 . Each elastic plate  32  is connected to the sidewall  31 . The elastic plate  32  can rotate around a connection point relative to the connected sidewall  31 . The connecting terminal  11  and the fastened wall  3  are snap-fitted under the action of the elastic plate  32 . 
     In an example, there may be two elastic plates  32 , and the two elastic plates  32  may be respectively connected to two opposite sidewalls  31 . In another example, there may be three elastic plates  32 , and the three elastic plates  32  may be respectively connected to three sidewalls  31 , or two elastic plates  32  may be connected to one sidewall  31 , and the other elastic plate  32  may be connected to another sidewall  31  opposite to the sidewall  31 . In another example, there may be four elastic plates  32 , and the four elastic plates  32  may be respectively connected to four sidewalls  31 , or two elastic plates  32  may be connected to one sidewall  31 , and the other two elastic plates  32  may be connected to another sidewall  31  opposite to the sidewall  31 . 
     In this embodiment, a specific quantity of elastic plates  32  is not limited, and sidewalls  31  to which the plurality of elastic plates  32  are respectively connected are not limited. This may be flexibly designed. 
     In an example, the elastic plate  32  and the sidewall  31  may be connected in a plurality of manners. For example, in a manner, the elastic plate  32  and the connected sidewall  31  may be integrally formed. In an example, a plurality of strip-shaped slits may be disposed in a height direction of the sidewall  31 , and the elastic plate  32  is formed between two adjacent strip-shaped slits. In another example, as shown in  FIG.  2   , the opening  313  for avoiding the plurality of cables  13  may be disposed on the sidewall  31 , and for the sidewall  31  on which the opening  313  is disposed, a strip-shaped slit is disposed on one side of the opening  313 . In this case, the elastic plate  32  may be formed between the opening  313  and the strip-shaped slit. 
     In another example, the elastic plate  32  and the sidewall  31  may be connected through welding. For example, a bottom of the elastic plate  32  in a height direction is welded to a top of the sidewall  31  in the height direction. 
     A specific manner of connecting the elastic plate  32  and the sidewall  31  is not limited in this embodiment. 
     As described above, the elastic plate  32  is used to snap-fit the connecting terminal  11  and the fastened wall  3 . There are a plurality of snap-fitting manners. For example, a manner may be as follows: As shown in  FIG.  2   , a first end of the elastic plate  32  in the height direction is connected to the sidewall  31 , and a second end in the height direction is far away from the connected sidewall  31 . In other words, the elastic plate  32  stands on the connected sidewall  31 , for example, may stand upright on the connected sidewall  31 , and a plane on which the elastic plate  32  is located and a plane on which the connected sidewall  31  is located are co-planar. For another example, the elastic plate  32  is inclined to stand on the connected sidewall  31 , and there is an obtuse angle between a plane on which the elastic plate  32  is located and a plane on which the connected sidewall  31  is located. 
     Each elastic plate  32  is provided with a first positioning hole  321 , and there are a plurality of first positioning protrusions  111  on a side surface  11   a  of the connecting terminal  11 . The first positioning hole  321  matches the first positioning protrusion  111 . When the connecting terminal  11  is located in the annular space  30  of the fastened wall  3 , the first positioning protrusion  111  may be located in the first positioning hole  321 . 
     The first positioning protrusion  111  is located in the first positioning hole  321 , to snap-fit the connecting terminal  11  and the fastened wall  3 . 
     The connecting terminal  11  and the fastened wall  3  are snap-fitted by fitting the first positioning protrusion  111  and the first positioning hole  321 . Therefore, it is relatively convenient to assemble the cable connector  1  on the printed circuit board  2  and detach the cable connector  1  from the printed circuit board  2 , and efficiency of assembly and detachment between the cable connector  1  and the printed circuit board  2  may be improved. 
       FIG.  6    and  FIG.  7    are a schematic diagram of a process of assembling the cable connector  1 , the printed circuit board  2 , and the fastened wall  3 . As shown in  FIG.  6   , in a process of moving downward the connecting terminal  11  in the cable connector  1  to the fastened wall  3  from a direction directly above the fastened wall  3  to a direction close to the fastened wall  3 , as shown in (a) in  FIG.  6   , the first positioning protrusion  111  located on the side surface of the connecting terminal  11  is in contact with the elastic plate  32 . When the connecting terminal  11  continues to be moved downward in a direction close to the substrate  21 , as shown in (b) in  FIG.  6   , the elastic plate  32  rotates out of a frame of the fastened wall  3  around the connection point relative to the connected sidewall  31 , so that the elastic plate  32  is extended out of the frame of the fastened wall  3 , and then the connecting terminal  11  can continue to be moved in the direction close to the substrate  21 . 
     When the first positioning protrusion  111  on a side surface of the connecting terminal  11  is moved downward to the first positioning hole  321 , the elastic plate  32  rebounds to a natural state, as shown in (a) in  FIG.  7   . In this case, the connecting terminal  11  can be moved downward and further downward movement is stopped when the bottom of the connecting terminal  11  is in contact with the substrate  21 , or the connecting terminal  11  can be moved downward and further downward movement is stopped when the first contact  12  is compressed to a limit position. In  FIG.  7   , (a) may be a schematic diagram in which downward movement of the connecting terminal  11  is stopped because the bottom of the connecting terminal  11  is in contact with the substrate  21 , or may be a schematic diagram in which downward movement of the connecting terminal  11  is stopped because the first contact  12  is compressed to the limit position. 
     After external force exerted for moving downward the connecting terminal  11  is removed, the connecting terminal  11  moves upward under the action of elastic force of the first contact  12 , and stops moving upward when the first positioning protrusion  111  of the connecting terminal  11  is in contact with an upper edge of the first positioning hole  321 , as shown in (b) in  FIG.  7   . In this case, the first contact  12  is still compressed between the connecting terminal  11  and the second contact  22 . In this way, under the action of fitting the first positioning protrusion  111  and the first positioning hole  321 , the first contact  12  is compressed between the second contact  22  and the bottom of the connecting terminal  11 , so that the first contact  12  and the second contact  22  can be in close contact, to improve stability of an electrical connection. 
     To implement that the first contact  12  can still be compressed on the second contact  22  when the first positioning protrusion  111  is in contact with the upper edge of the first positioning hole  321 , a value of a height h between the upper edge of the first positioning hole  321  and a bottom of the connected sidewall  31  may be greater than or equal to h 1  and less than h 2 . Herein, h 1  is a distance that is between the substrate  21  and a position, of the connecting terminal  11 , used to be in contact with the upper edge of the first positioning hole  321  and that exists when the connecting terminal  11  is moved downward to be closest to the substrate  21 , as shown in (a) in  FIG.  7   , and h 2  is a distance that is between the substrate  21  and the position, of the connecting terminal  11 , used to be in contact with the upper edge of the first positioning hole  321  and that exists when the connecting terminal  11  moves, under the action of rebound force of the first contact  12 , upward to be furthest away from the substrate  21 . 
     A distance between the upper edge and a lower edge of the first positioning hole  321 , namely, a height of the first positioning hole  321 , is related to a length of the first positioning protrusion  111  in the height direction (namely, a height of the first positioning protrusion  111 ). For example, the height of the first positioning hole  321  is greater than the height of the first positioning protrusion  111 . To increase a speed of processing the first positioning hole  321 , the height of the first positioning hole  321  may be much greater than the height of the first positioning protrusion  111 . The height of the first positioning hole  321  is much greater than the height of the first positioning protrusion  111 , and therefore a requirement on precision of processing the first positioning hole  321  is lowered, and the speed of processing the first positioning hole  321  can be increased. 
     In this way, during processing of the fastened wall  3 , the height h between the upper edge of the first positioning hole  321  and the bottom of the sidewall  31  may be flexibly selected based on a rebound status of the first contact  12  and a contact requirement between the first contact  12  and the second contact  22 , so that the fastened wall  3  can adapt to different first contacts  12  and different contact requirements, to improve an application scenario of the fastened wall  3 . 
     In an example, to further enable the first contact  12  and the second contact  22  to be in close contact, the connecting terminal  11  in the cable connector  1  and the substrate  21  of the printed circuit board  2  may be fastened by using a screw, to further reinforce good contact between the first contact  12  and the second contact  22 . 
     In addition, if the connecting terminal  11  and the substrate  21  are connected by using a screw, the screw connection can enable the first contact  12  and the second contact  22  to be in close contact. In this case, the requirement on the precision of processing the first positioning hole  321  may be lowered, to increase the speed of processing the first positioning hole  321 . 
     Whether the connecting terminal  11  and the substrate  21  are fastened by using a screw is not limited in this embodiment, and may be flexibly designed. 
     In an example, as shown in  FIG.  6    and  FIG.  7   , the first contact  12  in the cable connector  1  is in a shape of a check mark. In this structure, when the connecting terminal  11  is moved downward in the direction close to the substrate  21 , the first contact  12  is compressed, and a bottommost part of the first contact  12  moves on the second contact  22  to clean the second contact  22 . Then, the first contact  12  rebounds, and the bottommost part of the first contact  12  is in contact with a cleaned position of the second contact  22 . It may be learned that in this shape of a check mark of the first contact  12 , dust on a surface of the second contact  22  can be automatically cleared. 
     In an example, to enable the connecting terminal  11  to smoothly enter space in the frame of the fastened wall  3 , correspondingly, as shown in  FIG.  4    and with reference to  FIG.  6   , the second end that is of each elastic plate  32  and that is far away from the connected sidewall  31  is bent out of the frame of the fastened wall  3 . 
     There may be an obtuse angle or a round angle at a bent position of the elastic plate  32 . 
     As shown in  FIG.  6   , in the structure of the elastic plate  32 , the connecting terminal  11  can gradually extend the elastic plate  32  during downward movement, and is smoothly moved downward to the fastened wall  3 . 
     In an example, to enable the connecting terminal  11  to smoothly enter the space in the frame of the fastened wall  3 , correspondingly, as shown in  FIG.  5   , an end face that is of each first positioning protrusion  111  and that is far away from the side surface  11   a  on which the first positioning protrusion  111  is located includes an inclined surface  111   a.  An intersection line between a plane on which the inclined surface  111   a  is located and the side surface  11   a  is located below the first positioning protrusion  111 , and there is a direction close to the printed circuit board  2  below the first positioning protrusion  111 . 
     The inclined surface  111   a  of the first positioning protrusion  111  may match an inclined surface at the second end of the elastic plate  32 . When the connecting terminal  11  is moved downward to the space in the frame of the fastened wall  3 , the inclined surface ma of the first positioning protrusion  111  may be in contact with the inclined surface at the second end of the elastic plate  32 , and then the connecting terminal  11  gradually extends the elastic plate  32  out of the frame of the fastened wall  3  during downward movement, so that the connecting terminal  11  smoothly enters the space in the frame of the fastened wall  3 . 
     In the foregoing description, the connecting terminal  11  in the cable connector  1  is snap-fitted into the fastened wall  3  by fitting the first positioning protrusion  111  and the first positioning hole  321 . Another example in which the connecting terminal  11  is snap-fitted into the fastened wall  3  by using the elastic plate  32  is described below. 
     As shown in  FIG.  8   , each elastic plate  32  includes a parent body  322  and a folding body  323  formed through folding. As shown in  FIG.  9   , the parent body  322  is connected to the sidewall  31 , and the folding body  323  is located in the fastened wall  3 . As shown in  FIG.  10   , the folding body  323  of each elastic plate  32  is located on an upper surface that is of the connecting terminal  11  and that is far away from the substrate  21 . 
     An angle between the folding body  323  and the parent body  322  may be greater than or equal to o degrees and less than 90 degrees. 
     Values of a distance between an end of the folding body  323  and a bottom of the connected sidewall  31  and the height h between the upper edge of the first positioning hole  321  and the bottom of the connected sidewall  31  may be the same, and are both greater than or equal to h 1 , and less than h 2 . In this case, h 1 , is a distance that is between the substrate  21  and a position, of the connecting terminal  11 , used to be in contact with the folding body  323  and that exists when the connecting terminal  11  is moved downward to be closest to the substrate  21 , and h 2  is a distance that is between the substrate  21  and the position, of the connecting terminal  11 , used to be in contact with folding body  323  and that exists when the connecting terminal  11  moves, under the action of rebound force of the first contact  12 , upward to be furthest away from the substrate  21 . 
     In an example, if the connecting terminal  11  has a relatively large thickness, to implement that the folding body  323  is located on the upper surface of the connecting terminal  11 , the elastic plate  32  needs to have a relatively large height and a relatively large size. To reduce the size of the elastic plate  32 , correspondingly, as shown in  FIG.  10   , there may be a step at the position, of the connecting terminal  11 , used to be in contact with the folding body  323 . In this case, the folding body  323  may be located on an upper surface, of the step, close to the substrate  21 . In this way, an overall height of the elastic plate  32  is equivalent to a height of the connected sidewall  31 , and is not excessively large. 
     The connecting terminal  11  and the fastened wall  3  may be snap-fitted by pressing the elastic plate  32  onto the upper surface that is of the connecting terminal  11  and that is far away from the substrate  21 . In this snap-fitting manner, it is relatively convenient to mount the cable connector  1  on the printed circuit board  2 , and efficiency of assembly between the cable connector  1  and the printed circuit board  2  may be improved. 
     Based on the foregoing description, in the manner of snap-fitting the connecting terminal  11  and the fastened wall  3 , automatic batch assembly of the cable connector  1  and the printed circuit board  2  can be implemented, to improve assembly efficiency. This is because if there is no snap-fitting relationship between the connecting terminal  11  and the fastened wall  3 , during assembly, after the connecting terminal  11  is placed in the fastened wall  3  but before the connecting terminal  11  is fastened to the fastened wall  3  by using a fastener, the connecting terminal  11  is detached from the fastened wall  3  under the action of the cable  13  due to a relatively small size. Therefore, the connecting terminal  11  needs to be pressed into the fastened wall  3 , and then the connecting terminal  11  is fastened to the fastened wall  3  by using the fastener. It may be learned that when the connecting terminal  11  is placed in the fastened wall  3 , the connecting terminal  11  and the fastened wall  3  are snap-fitted, so that the connecting terminal  11  is stably placed in the fastened wall  3 . In this case, in a subsequent procedure, the connecting terminal  11  does not need to be pressed, and the connecting terminal  11  is not detached from the fastened wall  3 . Therefore, in the manner of snap-fitting the connecting terminal  11  and the fastened wall  3 , a pre-fastening function can be further achieved, to improve the efficiency of assembly between the cable connector  1  and the printed circuit board  2 . In addition, in the snap-fitting relationship between the connecting terminal  11  and the fastened wall  3 , screw-free mounting can be implemented. 
     In the foregoing description, there is a solution in which the cable connector  1  and the fastened wall  3  are snap-fitted by using the connecting terminal  11 . In this solution, the connecting terminal  11  is snap-fitted into the fastened wall  3  by using the elastic plate  32 . A solution in which the cable connector  1  and the fastened wall are snap-fitted by using a shielding can  14  is described below. 
     As shown in  FIG.  11   , the cable connector  1  may include the shielding can  14 . The shielding can  14  can be used to reduce interference caused by a signal of a surrounding component to a signal transmitted in the electrical connection apparatus, and may be further used to reduce interference caused by the signal transmitted in the electrical connection apparatus to a signal of another component. 
     In an example, the shielding can  14  may cover a surface that is of the connecting terminal  11  and that is far away from the substrate  21 , and cover the connecting terminal  11 . The shielding can  14  and the connecting terminal  11  may be fastened. For example, the shielding can  14  and the connecting terminal  11  may be fastened in a detachable manner. For another example, the shielding can  14  and the connecting terminal  11  may be fastened in a non-detachable manner. For example, the shielding can  14  and the connecting terminal  11  are welded. In this manner, the shielding can  14  and the connecting terminal  11  are of an integral structure, are simultaneously mounted on the printed circuit board  2 , and are simultaneously detached from the printed circuit board  2 . 
     In an example, the shielding can  14  and the fastened wall  3  may be detachably fastened. For another example, the shielding can  14  and the fastened wall  3  may be snap-fitted. As shown in  FIG.  11   , the shielding can  14  is provided with a second positioning hole  141 , there is a second positioning protrusion  311  on the sidewall  31 , and the second positioning protrusion  311  is located in the second positioning hole  141 , to snap-fit the shielding can  14  and the fastened wall  3 . 
     There may be a plurality of second positioning protrusions  311 . For example, there may be two second positioning protrusions  311 , and the two second positioning protrusions  311  may be respectively located on outer surfaces of two opposite sidewalls  31 . For another example, there may be three second positioning protrusions  311 , and the three second positioning protrusions  311  may be respectively located on three sidewalls  31 , or two second positioning protrusions  311  may be located on one sidewall  31 , and the other second positioning protrusion  311  may be located on another sidewall  31  opposite to the sidewall  31 . For another example, there may be four second positioning protrusions  311 , and the four second positioning protrusions  311  may be respectively located on four sidewalls  31 , or two second positioning protrusions  311  may be located on one sidewall  31 , and the other two second positioning protrusions  311  may be located on another sidewall  31  opposite to the sidewall  31 . 
     In this embodiment, a specific quantity of second positioning protrusions  311  is not limited, and sidewalls  31  on which the plurality of second positioning protrusions  311  are respectively located are not limited. This may be flexibly designed. 
     A quantity of second positioning holes  141  is the same as the quantity of second positioning protrusions  311 , and a position of the second positioning hole  141  corresponds to a position of the second positioning protrusion  311 . 
     It should be noted that the second positioning protrusion  311  and the second positioning hole  141  may be interchanged. For example, the shielding can  14  is provided with a positioning hole, and there is a positioning protrusion on the sidewall  31  of the fastened wall  3 . 
     In this way, a snap-fitting relationship between the shielding can  14  and the fastened wall  3  may be implemented by fitting the second positioning protrusion  311  and the second positioning hole  141 . 
     Certainly, the shielding can  14  and the fastened wall  3  may be fastened by using a screw. 
     Through detachable fastening of the shielding can  14  and the fastened wall  3 , the connecting terminal  11  can be further tightly pressed into the fastened wall  3 , so that the first contact  12  and the second contact  22  are in close contact. 
     Based on the foregoing description, there may be at least the following several solutions in which the cable connector  1  and the printed circuit board  2  are snap-fitted. 
     Solution 1: The connecting terminal  11  and the fastened wall  3  are snap-fitted, and the shielding can  14  and the fastened wall  3  are not snap-fitted. In this solution, the shielding can  14  may be fastened to the connecting terminal  11 , for example, an inner surface of the shielding can  14  and an outer surface of the connecting terminal  11  are welded, and the first contact  12  in the cable connector  1  and the second contact  22  on the printed circuit board  2  are in close contact through snap-fitting of the connecting terminal  11  and the fastened wall  3 . 
     Solution 2: The connecting terminal  11  and the fastened wall  3  are not snap-fitted, and the shielding can  14  and the fastened wall  3  are snap-fitted. In this solution, the connecting terminal  11  and the fastened wall  3  are not snap-fitted, and therefore the fastened wall  3  may not include the elastic plate  32 , and includes the plurality of sidewalls  31 . In addition, the connecting terminal  11  and the fastened wall  3  are not snap-fitted, and therefore during assembly, after the connecting terminal  11  is placed in the fastened wall  3 , the connecting terminal  11  needs to be pressed, to avoid detachment from the fastened wall  3 . To avoid pressing the connecting terminal  11 , correspondingly, the shielding can  14  and the connecting terminal  11  may be first fastened, or the shielding can  14  and the connecting terminal  11  may be fastened after processing of the cable connector  1  is completed. In this way, in a process of moving downward the cable connector  1  from the direction directly above the fastened wall  3 , when the shielding can  14  and the fastened wall  3  are snap-fitted, the connecting terminal  11  is fastened to the fastened wall  3 . In this way, automatic assembly can be implemented without pressing the connecting terminal  11 , to improve assembly efficiency. The first contact  12  in the cable connector  1  and the second contact  22  on the printed circuit board  2  are in close contact through snap-fitting of the shielding can  14  and the fastened wall  3 . 
     Solution 3: The connecting terminal  11  and the fastened wall  3  are snap-fitted, and the shielding can  14  and the fastened wall  3  are snap-fitted. In this solution, there is a snap-fitting relationship between the shielding can  14  and the fastened wall  3 , and therefore the shielding can  14  and the connecting terminal  11  may not be fastened, or certainly there may be a fastening relationship. In this way, during assembly, the connecting terminal  11  is first moved downward from the direction directly above the fastened wall  3  to the direction close to the substrate  21 , and when the connecting terminal  11  is moved downward to the fastened wall  3 , snap-fitting of the connecting terminal  11  and the fastened wall  3  may be completed. Then, the shielding can  14  is moved downward from a direction directly above the connecting terminal  11  to a direction close to the connecting terminal  11  and moved downward until the shielding can  14  and the fastened wall  3  are snap-fitted. The first contact  12  in the cable connector  1  and the second contact  22  on the printed circuit board  2  are in close contact through snap-fitting of the connecting terminal  11  and the fastened wall  3  and snap-fitting of the shielding can  14  and the fastened wall  3 . 
     In any one of the foregoing solutions, automatic assembly of the cable connector  1  and the printed circuit board  2  is implemented, to improve assembly efficiency, and screw-free assembly can be implemented. 
     As described above, when two components need to be electrically connected by using the electrical connection apparatus, the cable connector  1  and the printed circuit board  2  may be fitted for implementation. When two components do not need to be electrically connected by using the electrical connection apparatus, the cable connector  1  and the printed circuit board  2  may not be fitted. 
     When the cable connector  1  and the printed circuit board  2  are not fitted, to reduce dust on the second contact  22  on the printed circuit board  2 , correspondingly, as shown in  FIG.  12   , the electrical connection apparatus further includes a dustproof cover  4 , and the dustproof cover  4  matches the annular space  30 . When the cable connector  1  and the printed circuit board  2  are not fitted, the dustproof cover  4  is located in the annular space  30 , to cover the plurality of second contacts  22  in a direction far away from the substrate  21 . 
     In an example, the dustproof cover  4  and the fastened wall  3  are connected in a detachable fastening manner. For example, the dustproof cover  4  and the fastened wall  3  may be connected through snap-fitting. For another example, the dustproof cover  4  and the fastened wall  3  may be connected through clamping. 
     In an example, as shown in  FIG.  11   , there is a clamping groove  41  on a side part of the dustproof cover  4 . When the cable connector  1  and the printed circuit board  2  are not fitted, the clamping groove  41  and the sidewall  31  are clamped. That is, as shown in  FIG.  12    and with reference to  FIG.  13   , the dustproof cover  4  may be moved downward from a direction directly above the annular space  30  until the clamping groove  41  is clamped on the sidewall  31 , to implement clamping of the dustproof cover  4  and the fastened wall  3 . 
     The dustproof cover  4  covers the printed circuit board  2 . To prevent the dustproof cover  4  from wearing the second contact  22  on the substrate  21 , correspondingly, when the clamping groove  41  and the sidewall  31  are clamped, there is a gap between the dustproof cover  4  and the second contact  22 . In this way, although the dustproof cover  4  covers the second contact  22 , the dustproof cover  4  is not in contact with the second contact  22 . Therefore, the dustproof cover  4  can be prevented from wearing the second contact  22 . 
     A groove depth of the clamping groove  41  may be set, so that when the clamping groove  41  is completely clamped on the sidewall  31 , there is a gap between the dustproof cover  4  and the second contact  22 , and the dustproof cover  4  and the second contact  22  are not in contact. 
     In an example, the clamping groove  41  may be formed in the following manner: As shown in  FIG.  12   , there is an L-shaped protrusion on the side part of the dustproof cover  4 . A horizontal part of the L-shaped protrusion is fastened to the side part of the dustproof cover  4 . A spacing between a vertical part of the L-shaped protrusion and the side part of the dustproof cover  4  matches the thickness of the sidewall  31  of the fastened wall  3 . For example, the spacing between the vertical part of the L-shaped protrusion and the side part of the dustproof cover  4  is greater than the thickness of the sidewall  31  of the fastened wall  3 . In this way, the clamping groove  41  may be formed on the side part of the dustproof cover  4 . The groove depth of the clamping groove  41  is a length of the vertical part of the L-shaped protrusion. 
     In this way, when the cable connector  1  and the printed circuit board  2  need to be fitted, the dustproof cover  4  may be removed, and the cable connector  1  may be detachably fastened to the fastened wall  3 . When the cable connector  1  and the printed circuit board  2  do not need to be fitted, the dustproof cover  4  may be detachably fastened to the fastened wall  3 . 
     To facilitate assembly and detachment of the dustproof cover  4 , correspondingly, as shown in  FIG.  12   , there may be a handle structure  42  on a top of the dustproof cover  4 . The dustproof cover  4  may be more conveniently assembled and detached by holding the handle structure  42 . There may be one or more handle structures  42 . For example, there may be one handle structure  42 , and the handle structure  42  may be located at a central position of the top of the dustproof cover  4 . For another example, there are two handle structures  42 , and the two handle structures  42  are opposite to each other. The handle structure  42  may be an L-shaped protrusion, and a vertical part of the handle structure  42 , namely, the L-shaped protrusion, is fastened to the top of the dustproof cover  4 . 
     In an example, to improve efficiency of assembling the dustproof cover  4  to the fastened wall  3 , correspondingly, as shown in  FIG.  12   , there are a plurality of third positioning rods  43  at a bottom of the dustproof cover  4 , and there may be a plurality of third positioning holes on the substrate  21 . The third positioning rod  43  and the third positioning hole fit with each other. Alternatively, the third positioning rod  43  fits with the first positioning hole  211 . The first positioning hole  211  is a positioning hole that fits with the first positioning rod  112  at the bottom of the connecting terminal  11  when the connecting terminal  11  is assembled. In other words, the first positioning rod  112  at the bottom of the connecting terminal  11  and the third positioning rod  43  of the dustproof cover  4  share the first positioning hole  211  on the substrate  21 . 
     In the example of this application, the fastened wall used to tightly press the connecting terminal in the cable connector onto the printed circuit board includes the plurality of sidewalls, and has a simple structure. During assembly of the cable connector and the printed circuit board, the connecting terminal in the cable connector is moved downward from the direction directly above the fastened wall to the direction close to the printed circuit board, and when the connecting terminal is moved downward to the fastened wall, the cable connector and the fastened wall are fastened in the detachable manner. It may be learned that during assembly of the cable connector and the printed circuit board, an operation is always performed in a direction that is directly above the fastened wall and that is far away from the printed circuit board, and space, on the printed circuit board, around the fastened wall is not affected. Therefore, the fastened wall that serves a fastener for tightly pressing the cable connector onto the printed circuit board occupies relatively small space on the printed circuit board, and space on the printed circuit board can be saved. In addition, another component may be further arranged in the space, on the printed circuit board, around the fastened wall, so that a relatively large quantity of components may be mounted on the printed circuit board, to facilitate high-density development. 
     An embodiment of this application further provides a method for manufacturing an electrical connection apparatus. The method is used to process the foregoing electrical connection apparatus. The method may be performed based on the following steps. 
     In a process of processing a cable connector  1  that includes a connecting terminal  11  and a plurality of first contacts  12 , the plurality of first contacts  12  may be fastened to the connecting terminal  11 , where one part of each first contact  12  extends from the connecting terminal  11 , to obtain the cable connector  1 . 
     The cable connector  1  may further include a plurality of cables  13 . In this case, one end of each of the plurality of cables  13  may be welded to the connecting terminal  11  and electrically connected to the first contact  12 , and the other end of each of the plurality of cables  13  extends from the connecting terminal  11 . 
     In a process of processing a printed circuit board  2  that includes a substrate  21  and a plurality of second contacts  22 , the plurality of second contacts  22  may be fastened to a surface of the substrate  21 , to obtain the printed circuit board  2 . 
     For example, the plurality of second contacts  22  may be processed on the surface of the substrate  21  during circuit printing. For another example, the plurality of second contacts  22  may be processed on the surface of the substrate  21  after circuit printing is completed. 
     If a fastened wall  3  is of the structure shown in  FIG.  2   , in a process of processing the fastened wall  3 , a plurality of sidewalls  31  may be head-to-tail connected, to form annular space  30  used to accommodate the connecting terminal  11 , so as to obtain the fastened wall  3 . 
     Processes of processing the cable connector  1 , the printed circuit board  2 , and the fastened wall  3  are not performed in a sequence, and may be simultaneously and concurrently performed. After each component is processed, assembly may be performed. An assembly process is described below. 
     The plurality of sidewalls  31  may be first fastened to the substrate  21 . The plurality of sidewalls  31  are located on at least two opposite sides of the plurality of second contacts  22 . For specific details, refer to the foregoing description. Details are not described herein. 
     If the plurality of sidewalls  31  of the fastened wall  3  are distributed on all sides of the second contacts  22 , the plurality of sidewalls  31  may be fastened to the substrate  21  and surround the plurality of second contacts  22 , as shown in  FIG.  2   . 
     After the fastened wall  3  is fastened to the printed circuit board  2 , when the cable connector  1  and the printed circuit board  2  need to be electrically connected, in other words, when the cable connector  1  and the printed circuit board  2  are fitted, the connecting terminal  11  may be placed in the fastened wall  3 , and the cable connector  1  and the fastened wall  3  are fastened in a detachable manner. The first contact  12  and the second contact  22  are in close contact. 
     The fastened wall of the processed electrical connection apparatus is used to press the connecting terminal in the cable connector onto the printed circuit board, includes the plurality of sidewalls, and has a simple structure. During assembly of the cable connector and the printed circuit board, the connecting terminal in the cable connector is moved downward from a direction directly above the fastened wall to a direction close to the printed circuit board, and when the connecting terminal is moved downward to the fastened wall, the cable connector and the fastened wall are fastened in the detachable manner. It may be learned that during assembly of the cable connector and the printed circuit board, an operation is always performed in a direction that is directly above the fastened wall and that is far away from the printed circuit board, and space, on the printed circuit board, around the fastened wall is not affected. Therefore, the fastened wall that serves a fastener for tightly pressing the cable connector onto the printed circuit board occupies relatively small space on the printed circuit board, and space on the printed circuit board can be saved. In addition, another component may be further arranged in the space, on the printed circuit board, around the fastened wall, so that a relatively large quantity of components may be mounted on the printed circuit board, to facilitate high-density development. 
     In an example, the cable connector  1  and the printed circuit board  2  may be detachably fastened through snap-fitting cable connector, for example, snap-fitting of the connecting terminal  11  and the fastened wall  3 . When there is a snap-fitting relationship between the connecting terminal  11  and the fastened wall  3 , the fastened wall  3  includes the plurality of sidewalls  31 , and may further include a plurality of elastic plates  32 . In this case, the process of processing the fastened wall  3  may include connecting each of the plurality of elastic plates  32  to the sidewall  31 . 
     The elastic plate  32  can rotate around a connection point relative to the connected sidewall  31 , and is configured to enable the connecting terminal  11  and the fastened wall  3  to be snap-fitted. 
     In an example, if the fastened wall  3  is of the structure shown in  FIG.  2   , the process of processing the fastened wall  3  may be as follows: The plurality of sidewalls  31  may be first head-to-tail connected, to form the annular space  30  used to accommodate the connecting terminal  11 ; and then each of the plurality of elastic plates  32  is connected to the sidewall  31 , to obtain the fastened wall  3 . Alternatively, the elastic plate  32  and the sidewall  31  may be first connected; and then the plurality of sidewalls  31  connected to the elastic plate  32  are head-to-tail connected, to form the annular space  30  used to accommodate the connecting terminal  11 . 
     For a manner of connecting the elastic plate  32  and the sidewall  31 , a quantity of elastic plates  32 , and distribution of the elastic plates  32 , refer to the foregoing description. Details are not described herein. 
     In an example, there are a plurality of manners of snap-fitting the connecting terminal  11  and the fastened wall  3  by using the elastic plate  32 . A manner may be as follows: First, a first end of each of the plurality of elastic plates  32  in a height direction is connected to the sidewall  31 . A second end of each elastic plate  32  is far away from the connected sidewall  31 . Each elastic plate  32  is provided with a first positioning hole  321 , and there are a plurality of first positioning protrusions  111  on a side surface  11   a  of the connecting terminal it Then, the connecting terminal  11  is placed in the fastened wall  3 , so that the first positioning protrusion  111  is located in the first positioning hole  321 . In this manner, the connecting terminal  11  is snap-fitted into the fastened wall  3  through fitting of the protrusion and the positioning hole. 
     Another manner may be as follows: Each elastic plate  32  includes a parent body  322  and a folding body  323  formed through folding. First, the parent body  322  of each elastic plate  32  may be connected to the sidewall  31 . The folding body  323  is located in a frame of the fastened wall  3 . Then, the connecting terminal  11  may be placed in the fastened wall  3 , so that the folding body  323  of each elastic plate  32  is pressed onto an upper surface that is of the connecting terminal  11  and that is far away from the substrate  21 . 
     In an example, the elastic plate  32  may be first folded to form the elastic plate  32  including the parent body  322  and the folding body  323 , and then the elastic plate  32  including the parent body  322  and the folding body  323  is connected to the sidewall  31 . 
     In another example, the elastic plate  32  may be first connected to the sidewall  31 , and then the elastic plate  32  is folded towards the frame of the fastened wall  3 , to form the elastic plate  32  including the parent body  322  and the folding body  323 . 
     For the elastic plate  32  including the parent body  322  and the folding body  323 , the folding body  323  is pressed onto the upper surface of the connecting terminal  11 , so that the connecting terminal  11  is snap-fitted into the fastened wall  3 . 
     In an example, the cable connector  1  may further include a shielding can  14 , to reduce interference caused by a surrounding component to a signal transmitted in the electrical connection apparatus and to reduce interference caused by the signal transmitted in the electrical connection apparatus to another component. Correspondingly, the method may further include: covering a surface that is of the connecting terminal  11  and that is far away from the substrate  21  with the shielding can  14 , and snap-fitting the shielding can  14  and the fastened wall  3 . 
     A process of covering the connecting terminal  11  with the shielding can  14  may be performed before the connecting terminal  11  is mounted into the fastened wall  3  or after the connecting terminal  11  is mounted into the fastened wall  3 . 
     In an example, when the cable connector  1  and the printed circuit board  2  do not need to be electrically connected, in other words, when the cable connector  1  and the printed circuit board  2  are not fitted, to reduce dust accumulation on the second contact  22  on the printed circuit board  2 , correspondingly, the electrical connection apparatus may further include a dustproof cover  4 . Correspondingly, the method may further include: when the cable connector  1  and the printed circuit board  2  are not fitted, covering the plurality of second contacts  22  with the dustproof cover  4  in a direction far away from the substrate  21 . 
     The dustproof cover  4  may be detachably fastened to the fastened wall  3 , or may be detachably fastened to the substrate  21 . 
     For example, there is a clamping groove  41  on a side part of the dustproof cover  4 . In this case, the dustproof cover  4  may be placed in the fastened wall  3 , and the clamping groove  41  may be clamped on the sidewall  31 , so that the dustproof cover  4  is detachably fastened to the fastened wall  3 . 
     To prevent the dustproof cover  4  from wearing the second contact  22 , when the dustproof cover  4  is clamped with the sidewall  31  of the fastened wall  3  through the clamping groove  41 , there is a gap between the dustproof cover  4  and the second contact  22 . In this way, the dustproof cover  4  and the second contact  22  are not in contact, to effectively prevent the dustproof cover  4  from wearing the second contact  22 . 
     It may be learned that the clamping groove  41  of the dustproof cover  4  and the sidewall  31  of the fastened wall  3  are clamped. In this way, the dustproof cover  4  and the fastened wall  3  can be detachably fastened. In addition, there can be a gap between the dustproof cover  4  and the second contact  22 , and the dustproof cover  4  and the second contact  22  are not in contact with each other, to prevent the dustproof cover  4  from wearing the second contact  22  and protect the second contact  22 . 
     The fastened wall of the electrical connection apparatus processed by using this method is used to tightly press the connecting terminal in the cable connector onto the printed circuit board, includes the plurality of sidewalls, and has a simple structure. During assembly of the cable connector and the printed circuit board, the connecting terminal in the cable connector is moved downward from a direction directly above the fastened wall to a direction close to the printed circuit board, and when the connecting terminal is moved downward to the fastened wall, the cable connector and the fastened wall are fastened in the detachable manner. It may be learned that during assembly of the cable connector and the printed circuit board, an operation is always performed in a direction that is directly above the fastened wall and that is far away from the printed circuit board, and space, on the printed circuit board, around the fastened wall is not affected. Therefore, the fastened wall that serves a fastener for tightly pressing the cable connector onto the printed circuit board occupies relatively small space on the printed circuit board, and space on the printed circuit board can be saved. In addition, another component may be further arranged in the space, on the printed circuit board, around the fastened wall, so that a relatively large quantity of components may be mounted on the printed circuit board, to facilitate high-density development. 
     An embodiment of this application further provides a computer device. The computer device may be any device that includes components that are in an electrical connection relationship. For example, the computer device may be a communications device such as a router and a switch. 
     The computer device may include the foregoing electrical connection apparatus. One or more electrical connection apparatuses may be included. For example, in a solution in which there are a plurality of electrical connection apparatuses, printed circuit boards of the plurality of electrical connection apparatuses may be a same printed circuit board, and may be specifically a mainboard of the computer device. In this case, the mainboard may include a plurality of groups of second contacts, and each group of second contacts includes a plurality of second contacts. Each group of second contacts corresponds to one cable connector. For another example, in a solution in which there are a plurality of electrical connection apparatuses, printed circuit boards of the plurality of electrical connection apparatuses may not be a same printed circuit board. 
     In application, two same components in the computer device may be electrically connected by using the electrical connection apparatus, or two different components in the computer device may be electrically connected by using the electrical connection apparatus. 
     A fastened wall of the electrical connection apparatus included in the computer device is used to press a connecting terminal in a cable connector onto a printed circuit board, includes a plurality of sidewalls, and has a simple structure. During assembly of the cable connector and the printed circuit board, the connecting terminal in the cable connector is moved downward from a direction directly above the fastened wall to a direction close to the printed circuit board, and when the connecting terminal is moved downward to the fastened wall, the cable connector and the fastened wall are fastened in a detachable manner. It may be learned that during assembly of the cable connector and the printed circuit board, an operation is always performed in a direction that is directly above the fastened wall and that is far away from the printed circuit board, and space, on the printed circuit board, around the fastened wall is not affected. Therefore, the fastened wall that serves a fastener for tightly pressing the cable connector onto the printed circuit board occupies relatively small space on the printed circuit board, and space on the printed circuit board can be saved. In addition, another component may be further arranged in the space, on the printed circuit board, around the fastened wall, so that a relatively large quantity of components may be mounted on the printed circuit board, to facilitate high-density development. 
     The foregoing descriptions are merely an embodiment of this application, but are not intended to limit this application. Any modification, equivalent replacement, improvement, or the like made without departing from the principle of this application should fall within the protection scope of this application.