Electrical connector housing with cutting blade and method of use thereof

Abstract

An electrical connector housing for an electrical connector in which a slot is disposed in the electrical connector housing between a plurality of contact tabs and a front surface of the electrical connector housing. The slots vertically extend from the upper surface of the electric connector shell so as to be communicated with a plurality of channels for receiving insulated wires in the shell; a cutting blade is accommodated and fixed in the slot and is used for cutting the part, exceeding the slot or the cutting blade, of the insulated wire in the length direction of the electric connector shell; the housing can prevent short circuits, sparks and other electrical appliance risks caused by exposed or open wire ends on the connector.

Description

Technical Field

[0001] The present application relates to an electrical connector housing and a method for using the same, in particular to an electrical connector housing having a cutting sheet therein and a method for using the same to manufacture an electrical connector. Background Art

[0002] As electrical components used for high-speed data transmission become more complex and specialized, the corresponding wires are also given more specifications and are subject to more stringent requirements. While improving the application and performance of these connectors, it is necessary to set strict standards for their performance. Federal Communications Commission (FCC) rules and other industrial standards, such as Power over Ethernet (POE) and the Institute of Electrical and Electronics Engineers (IEEE) 802.3 standard (also known as alternative B mode) require precise configurations and dimensions. The housing of an electrical connector must be made of a moldable material that can be fully molded and deformed, such as plastic, so as to capture and retain the wires inside while isolating the internal current and maintaining precise dimensions. At the same time, the housing must also have sufficient rigidity to reliably support the wires and their associated contact pieces in a precise position to ensure that they can be properly engaged with the associated system components. In addition, the moldable material used to make the housing needs to ensure that the wires can be fully and effectively cut and terminated, and the insulation layer of each wire must isolate the individual conductors, and the connector must ensure that there is no short circuit from one wire to another or electrical connection with adjacent hardware. Furthermore, each conductor needs to be insulated and isolated from adjacent conductors and continuous external paths. The insulation and isolation should be sufficient to prevent any current from flowing between the conductors or flowing to external paths. In addition, the insulation layer should be durable enough and resist wear for a long time. For example, there is a product called Simply45 Cap isolation cover (see US10,811,831), which is an isolation cap / isolation strip that can be attached to the connector and covers the exposed wires after termination to prevent short circuits, sparks and other electrical risks caused by exposed or open wire ends on the connector.

[0003] Therefore, the construction, electrical and electronics industries all desire to provide an electrical connector housing that insulates wires and reduces the need for additional caps or auxiliary protection measures (such as the electrical connector housing of US10,811,831), which can eliminate sparks or electromigration on parallel, coaxial, close or adjacent conductive materials and comply with FCC regulations and POE standards. Summary of the invention

[0004] In order to overcome the aforementioned problems, the inventor of this application, Robert W. Sullivan, has improved upon the inventions of his U.S. Patents Nos. 5,996,224, 6,017,237, 6,105,229, 9,543,729, 10,116,082, 10,573,990, and 11,146,014 in this application. For more than 20 years, the eight-wire connector system disclosed in the above-mentioned U.S. Patents has been marketed under the registered trademark EZ-RJ45 and has been used in Ethernet cable systems throughout the industry. This application is intended to improve the EZ-RJ45 connector to achieve reliable electrical connections under relatively harsh or extreme environmental conditions.

[0005] In one embodiment of the present application, a housing of an electrical connector is provided, which has a front end wall forming horizontally arranged holes or openings therein. The housing has a cutting blade therein for cutting off the excess portion of the connecting wire and the cutting blade is positioned to be separated from the front end of the connector. The housing of the electrical connector provides sufficient space and guide paths to accommodate and guide the cutting blade, and the cutting blade and the electrical connector are integral. The wires are supported in a small space in the connector, and the excess wires are cut in the connector. After being cut, the excess wires are removed from the front end of the connector, thereby insulating the cut ends of the wires to avoid short circuits, sparks or mutual friction, copper exposure or contact with corresponding wires. The conductors in the wires are cut or positioned internally in the housing of the electrical connector to be away from the front of the electrical connector housing. This allows the conductors to be insulated after the wires are cut and terminated without the need for additional hardware or the use of a cap / strip system for auxiliary operations. As a result, the remote (cut end) of the exposed wire is kept a safe distance from the front end of the connector. The electrical connector housing is correctly fitted into its designated space in the associated terminal block to comply with FCC regulations and POE requirements without worrying about problems caused by the protrusion of excess wire ends.

[0006] In one embodiment of the present application, the contact plate / needle / blade is bonded, stamped or manufactured together with the cutting blade to form an integral unit. They are crimped and the wires are simultaneously cut by the cutting blade of the connector. In another embodiment, the contact plate / needle / blade is separated from the cutting blade, and the cutting blade cuts the insulated wires in series. In yet another embodiment, a separate external blade is provided to cut the insulated wires through the slots in the electrical connector housing. All embodiments are good at cutting off excess insulated wires while the electrical connector housing is crimped, and insulating and protecting the exposed cut wire ends. During the crimping process, the contact blade is forced into conductive engagement with the associated wires.

[0007] Because the cutting blade is disposed inside the electrical connector housing, the user can reduce the need for a cutting tool that requires an expensive cutting blade or requires expensive replacement when the cutting blade becomes dull. In addition, the internal cutting blade is configured to sever all protruding wire ends simultaneously or sequentially during the crimping operation without the need for an expensive external cutting blade or modification to the cutting / crimping tool and reducing the need for auxiliary operations.

[0008] In yet another embodiment, a guide path is provided vertically inside the electrical connector housing, which allows two horizontal or flat rows of wires to be inserted and passed through the front wall of the housing. In operation, a tool holds the contact plate / pin / blade in the housing to crimp the insulated wires, and then, by a secondary step, the cutting blade is driven to cut off the excess wire passing through the guide path. Alternatively, the tool drives the contact plate / pin / blade downward together with the cutting blade, so that the contact plate and wire are crimped and the excess portion of the wire is cut off. These improvements are intended to provide a connector suitable for CAT6A Ethernet cable and CAT6 type transmission compliant with POE, and reduce the adverse effects of short circuits, sparks and cross conduction to other non-ideal contacts.

[0009] In summary, the advantages brought by the present application include: (1) the arrangement of the wires inside the connector can minimize the interference or crosstalk between the data streams transmitted on each pair of wires; (2) the speed of data transmission can be increased while reducing the energy required; and the wires are also insulated to prevent electrical short circuits and avoid corrosion. In addition, in the above embodiment, the color-coded wires inserted into the connector can protrude outward from their front ends so that a technician can view the color-coded wires to confirm their correct relative positions before cutting them. The driven engagement of the metal contact plate / needle / blade with the wire and the cutting of the wire can be performed simultaneously or in series. This makes the process of connecting and cutting the wires faster and more efficient. In addition, it eliminates the need for a separate cutting tool and makes the connection more secure. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The various aspects of the present application can be best understood by reading the following embodiments in conjunction with the accompanying drawings. It should be noted that, according to standard practice in the industry, various features are not drawn to scale. In fact, for clarity of discussion, the size of various features may be arbitrarily enlarged or reduced.

[0011] Figure 1 It is a schematic diagram showing the first embodiment of the present application.

[0012] Figure 2 It is a schematic diagram showing a portion of using a tool to cut an insulated wire in the first embodiment of the present application.

[0013] Figure 3It is a schematic diagram showing the use of a tool to cut and crimp insulated wires in the second embodiment of the present application.

[0014] Figure 4 It is a schematic diagram showing that the contact piece is first pressed downward to crimp the insulated wire, and then a tool is used to cut off the insulated wire in the second embodiment of the present application.

[0015] Figure 5 It is a schematic diagram showing a partially cut-off portion of the insulated wire according to the second embodiment of the present application.

[0016] Figure 6 yes Figure 1 A front schematic diagram of the first embodiment is shown.

[0017] Figure 7 yes Figure 3 FIG. 2 is a front schematic diagram of the second embodiment shown in FIG.

[0018] Figure 8 It is a front schematic diagram of the third embodiment of the present application.

[0019] Fig. 9A Schematic diagram showing the contact between the cutting sheet and the contact sheet in one embodiment of the present application.

[0020] Fig. 9B yes Figure 3 A partial enlarged view of part A. DETAILED DESCRIPTION

[0021] The following disclosure provides many different embodiments or examples for achieving different features of the provided inventive objectives. Specific examples of components and configurations are set forth below to simplify the present application. Of course, these are merely examples and are not intended to be limiting. For example, the form of a first feature over or on a second feature described below may include an embodiment in which the first and second features are in direct contact, and may also include an embodiment in which additional features may be formed between the first and second features, so that the first and second features may not be in direct contact. In certain embodiments, the present application may repeat component symbols and / or letters in various examples. This repetition is for the purpose of simplicity and clarity and does not itself determine the relationship between the various embodiments and / or configurations discussed.

[0022] In addition, for ease of description, spatially relative terms such as "below," "beneath," "lower," "above," "upper," and the like may be used herein to describe the relationship of one component or feature to another component(s) or feature(s) illustrated in the figures. Spatially relative terms are intended to encompass orientations of the device in use or operation that may differ from the orientation depicted in the figures in some embodiments. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative terms used herein interpreted accordingly.

[0023] like Figure 1 and Figure 6 As shown in FIG. 1 , in a first embodiment of the present disclosure, an electrical connector housing 100 is provided. The electrical connector housing 100 has an upper surface 130 and includes a plurality of contact pieces 110, each of which is accommodated in a groove 120. A plurality of channels 140 are formed inside the electrical connector housing 100 and are positioned below the plurality of contact pieces 110. Each channel 140 communicates with a rear opening 150 and extends through a front surface 160 of the electrical connector housing 100. In the electrical connector housing 100, a slot 170 is formed between the plurality of contact pieces 110 and the front surface 160 of the electrical connector housing 100 in the length direction of the electrical connector housing 100. The slot 170 extends vertically from the upper surface 130 of the electrical connector housing 100 to communicate with each of the plurality of channels 140.

[0024] See also Figure 2 The slot 170 is configured to accommodate a cutting blade 210 of a cutting tool 200, wherein a position where a tip 211 of the cutting blade 210 is not located in the plurality of channels 140 is defined as a first position and a position where the tip 211 of the cutting blade 210 is located in the plurality of channels 140 is defined as a second position. Figure 2 As shown, the slots 170 are spaced apart from the plurality of contact pieces 110 in the length direction of the electrical connector housing 100. In this configuration, the contact pieces 110 can be pressed downward by a tool (not shown). Figure 2 As shown, a user needs to push the cutting tool 200 with the cutting blade 210 downward from the first position to the second position, so that the cutting blade 210 cuts off the insulated wires 500 in the channels 140, and the tip 211 of the cutting tool 200 is located in the channels 140. Figure 2 As shown, a crimping portion 220 is used to crimp a rear portion 190 of the electrical connector housing 100, so that the rear portion of the electrical connector housing 100 tightly clamps the insulated wires 500. In some embodiments of the present application, the left side 111 of the contact piece 110 is substantially flush with one side of the slot 170, and the left side of the contact piece 110 contacts the side of the slot 170.

[0025] like Figure 3 and Figure 7 As shown, in the second embodiment of the present application, an electrical connector housing 100a is provided. The electrical connector housing 100a has Figure 1The electrical connector housing 100a shown in FIG. 1 further includes a cutting blade 180 accommodated and held in the narrow slot 170, wherein the cutting blade 180 can be moved between a first position where a tip 181 of the cutting blade 180 is not located in the plurality of channels 140 and a second position where the tip 181 of the cutting blade 180 is located in the plurality of channels 140. In some embodiments of the present application, Figure 3 The cutting blade 180 is directly pre-embedded in the electrical connector housing 100a. Figure 3 As shown, the cutting blade 180 is spaced apart from the plurality of contact blades 110 in the length direction of the electrical connector housing 100 a. Fig. 9B Shown Figure 3 A is a partially enlarged part of the figure. Fig. 9B The shape of the contact piece 110 described in the figure reflects the actual shape of the contact piece. Figure 3 The shapes shown in the figure are for illustrative purposes only. In some embodiments of the present application, the cutting blade 180 contacts the plurality of contact blades 110 in the length direction of the electrical connector housing 100a. Fig. 9A , which shows the details of this configuration. In some embodiments of the present application, the cutting blade 180 is a single cutting blade and is made of hard plastic or ceramic that is hard enough to cut the insulated wire 500. The single cutting blade 180 can also be made of any other non-conductive material that is hard enough to cut the insulated wire 500. In some embodiments of the present application, the cutting blade 180 and the contact blade 110 are integrally formed, wherein the cutting blade 180 is hard enough to cut the insulated wire 500 and wherein the contact blade 110 is strong enough to crimp the wire 500. In some embodiments of the present application, only the single cutting blade tip 181 in the single cutting blade 180 is made of other non-conductive materials or coatings that are hard enough to cut the insulated wire 500 and insulate the wire end.

[0026] Figure 3 A method of operating the electrical connector housing 100a is shown: a crimping tool 300 is provided; the crimping tool 300 includes a first portion 310, a second portion 320, and a third portion 330 attached to the body of the crimping tool 300. When a user pushes the crimping tool 300 downward, the first portion 310 abuts against the upper portion of the cutting blade 180, and at the same time, the second portion 320 abuts against the contact blade 110. As a result, Figure 5As shown, the contact piece 110 moves downward and pierces the insulation layer of the insulated wire to establish an electrical connection between the contact piece 110 and the insulated wire, and the cutting piece 180 moves downward to cut off the portion of the insulated wire 500 protruding beyond the slot 170 or the cutting piece 180. The cut portion is removed from the front of the electrical connector housing 100a, thereby insulating the cut ends of the insulated wire 500 to prevent short circuits, sparks or mutual friction, copper exposure or contact with corresponding wires. Then, the third part 330 is crimped to a rear portion 190 of the electrical connector housing 100a and tightly clamps the insulated wire 500.

[0027] like Figure 4 In another operation of the electrical connector housing 100a, a crimping tool 300a is provided; the crimping tool 300a includes a first portion 310a and a second portion 330a to which the body of the crimping tool 300a is attached. In this operation, the contact pieces 110 can be pressed downward by a tool (not shown) to first pierce the insulation layer of the insulated wires, and then Figure 4 As shown, an electrical connection is established between the contact piece 110 and the insulating layer of the insulated wire 500, and then the crimping tool 300a is continuously pushed downward. As a result, the cutting blade 180 moves downward to cut off the portion of the insulated wire 500 protruding beyond the slot 170 or the cutting blade 180 (see FIG. Figure 5 The second portion 330a is crimped to a rear portion 190 of the electrical connector housing 100a so that the rear portion 190 of the electrical connector housing 100a tightly clamps the insulated wires 500.

[0028] In such Figure 8 In the third embodiment of the present application, an electrical connector housing 100b is provided. The channels 140 of the electrical connector housing 100b are arranged in two rows and the two rows of channels 140 are partially connected to each other. In the embodiment of the disclosure, the plurality of cutting blades 180b are made of metal, such as steel. The electrical connector housing 100b has Figure 2 and Figure 7 The electrical connector housing 100b is similar in structure to the electrical connector housing 100a shown. The difference between the electrical connector housing 100b and the electrical connector housing 100a is that the latter has a single cutting blade 180 while the former has a plurality of cutting blades 180b received in a plurality of thin slots 170b, each cutting blade 180b being aligned with a corresponding one of the equal channels 140, wherein the equal cutting blades 180b are mutually spaced apart. Figure 8The equal cutting blades 180b are spaced apart in the transverse direction of the electrical connector housing 100b, and can be moved between a first position where the tip 181b of the equal cutting blade 180b is not located in the plurality of channels 140 and a second position where the tip 181b of the equal cutting blade 180b is located in the plurality of channels 140. In some embodiments of the present application, the equal cutting blades 180b are spaced apart from the plurality of contact blades 110 in the length direction of the electrical connector housing 100b. In some other embodiments, the equal cutting blades 180b contact the plurality of contact blades 110 respectively in the length direction of the electrical connector housing 100b.

[0029] In one embodiment of the present application, a method for manufacturing an electrical connector is provided. The method comprises the following steps: (a) providing an electrical connector housing 100 (see FIG. 1 ) of the first embodiment described above; Figure 1 ); (b) providing a tool 200 having a cutting blade 210; (c) sequentially inserting each of the plurality of insulated wires 500 from the rear opening 150 of the electrical connector housing 100, and passing the plurality of insulated wires 500 through the corresponding channels 140 so that the front ends thereof protrude beyond the narrow slot 170; (d) pressing the equal contact pieces 110 of the electrical connector housing 100 by a crimping tool (not shown), so that the equal contact pieces 110 of the electrical connector housing 100 move downward and pierce the insulation layers of the equal insulated wires to establish electrical connection between the equal contact pieces 110 and the equal insulated wires 500; and (e) pressing the cutting blade 210 of the tool 200 into the narrow slot 170 of the electrical connector housing 100, so that the cutting blade 210 moves downward to cut off the portion of the insulated wire 500 protruding beyond the narrow slot 170 in the length direction of the electrical connector housing 100. In step (e), the crimping portion 220 of the tool 200 is simultaneously moved downward to crimp a rear portion 190 of the electrical connector housing 100 , so that the rear portion 190 of the electrical connector housing 100 tightly clamps the insulated wires 500 .

[0030] Another method of manufacturing an electrical connector of the present application comprises the following steps: (a) providing an electrical connector housing 100a (see FIG. 1 ) of the second embodiment; Figure 3 (b) inserting each of the plurality of insulated wires 500 from the rear opening 150 of the electrical connector housing 100a and passing each of the plurality of insulated wires 500 through the corresponding passage 140 so that the front end thereof protrudes beyond the slot 170 or the cutting blade 180; and (c) Figure 3 and Figure 5As shown, the contact pieces 110 and the cutting piece 180 of the electrical connector housing 100a are pressed simultaneously, so that the contact pieces 110 move downward and pierce the insulation layer of the insulated wires 500 to establish electrical connection between the contact pieces 110 and the insulated wires 500, and the cutting piece 180 moves downward to cut off the portion of the insulated wires 500 protruding beyond the slot 170 or the cutting piece 180. The cutting piece may or may not be made as a part of the contact piece or as an independent subset of a unit, or may be externally disposed on the electrical connector housing 100a.

[0031] Another method of manufacturing an electrical connector of the present application comprises the following steps: (a) providing an electrical connector housing 100b (see Figure 8 ); (b) inserting each of the plurality of insulated wires 500 from the rear opening 150 of the electrical connector housing 100b, and passing each of the plurality of insulated wires 500 through the corresponding passage 140 to protrude beyond the equal thin slots 170b or the equal cutting blades 180b; and (c) pressing the equal contact pieces 110 and the equal cutting blades 180b of the electrical connector housing 100a at the same time, so that the equal contact pieces 110 move downward and pierce the insulation layer of the equal insulated wires 500 to establish an electrical connection between the equal contact pieces 110 and the equal insulated wires 500, and the equal cutting blades 180b move downward to correspondingly cut off the portion of the equal insulated wires 500 protruding beyond the equal thin slots 170b or the equal cutting blades 180b. The cut portions are removed from the front of the electrical connector housing 100b, thereby insulating the cut ends of the equal wires 500 to prevent short circuits, sparks or mutual friction, copper exposure or contact with corresponding wires.

[0032] Although the numerical ranges and parameters listed in the broad scope of the present application are approximate values, the numerical values ​​listed in the specific examples are as accurate as possible. However, any numerical value itself contains a certain error, which is inevitably caused by the standard deviation found in the respective test measurements. In addition, the terms "substantial", "approximately" or "approximately" used herein generally refer to the numerical values ​​or ranges that can be considered by those with ordinary knowledge in the art. Alternatively, the terms "substantial", "approximately" or "approximately" refer to the average standard error range that can be accepted by those with ordinary knowledge in the art. Those with ordinary knowledge in the art can understand that the acceptable standard error may vary from technology to technology. Except for the operation / working examples, or unless otherwise specified, all numerical ranges, quantities, values ​​and percentages disclosed herein, such as material quantity, duration, temperature, operating conditions, quantity ratios or other similar persons should be understood as being modified by the terms "substantial", "approximately" or "approximately" in all cases. Therefore, unless there is a contrary statement, the numerical parameters listed in the present application and the attached claims are approximate values, which can be changed according to demand. At least, each numerical parameter should be interpreted in view of the number of significant digits presented and by applying general rounding methods. The range herein can represent a range from one endpoint value to another endpoint value or between two endpoint values. Unless otherwise stated, all ranges disclosed herein include the endpoint values.

[0033] The features of several embodiments are summarized above so that those skilled in the art can better understand the various aspects of the present application. Those skilled in the art will appreciate that they can easily design or modify other operations and structures based on the present application to accomplish the same purpose and / or achieve the same advantages as the embodiments described herein. Those skilled in the art will also appreciate that such equivalent structures do not deviate from the spirit and scope of the present application, and they can make various modifications, substitutions or changes to the present application without departing from the spirit and scope of the present application.

[0034] In addition, the scope of the present application is not limited to the specific embodiments of the processes, machines, manufactures, compositions, means, methods and steps described in the specification. As those with ordinary knowledge in the art will readily understand from the disclosure of the present invention, existing or later developed processes, machines, manufactures, compositions, means, methods or steps that can perform substantially the same functions or achieve substantially the same results as the corresponding embodiments described herein can be used according to the present application. Therefore, the attached claims are intended to include such processes, machines, manufactures, compositions, means, methods and steps within their scope.

[0035] [Explanation of Symbols]

[0036] 100,100a,100b electrical connector housing

[0037] 110 Contact piece

[0038] 111 Left side of contact strip

[0039] 120 grooves

[0040] 130 Upper surface

[0041] 140 channels

[0042] 150 rear opening

[0043] 160 front surface

[0044] 170 Slot

[0045] 170b Thin Slot

[0046] 180,180b Cutting disc

[0047] 181,181b Tip

[0048] 190 Rear

[0049] 200 Tools

[0050] 210 Cutting disc

[0051] 211 Tip

[0052] 220 Crimping section

[0053] 300,300a Crimping tool

[0054] 310,310a Part I

[0055] 320,330a Part II

[0056] 330 Part 3

[0057] 500 Insulated wire / cord

Claims

1. An electrical connector housing, comprising: a plurality of contact pieces, each of the plurality of contact pieces being received in a groove formed in an upper surface of the electrical connector housing; a plurality of channels formed within the electrical connector housing and positioned below the plurality of contact pads; Each of the plurality of passages communicates with the rear opening and extends through a front surface of the electrical connector housing; as well as A slot is formed between the plurality of contact pieces and the front surface of the electrical connector housing, the slot vertically extending from the upper surface of the electrical connector housing to connect with each of the plurality of channels.

2. The electrical connector housing according to claim 1, wherein the narrow slot is configured to accommodate a cutting blade of a cutting tool, wherein a position where a tip of the cutting blade is not located in the plurality of channels is defined as a first position, and wherein a position where the tip of the cutting blade is located in the plurality of channels is defined as a second position. 3 . The electrical connector housing according to claim 2 , wherein the slot is spaced apart from the plurality of contact pieces in a length direction of the electrical connector housing. 4 . The electrical connector housing according to claim 2 , wherein a side of the contact piece facing the front surface is substantially flush with and contacts a corresponding side of the slot.

5. The electrical connector housing of claim 1 , further comprising a cutting blade received in the slot, wherein the cutting blade is movable between a first position in which a tip of the cutting blade is not located in the plurality of channels and a second position in which the tip of the cutting blade is located in the plurality of channels. 6 . The electrical connector housing according to claim 5 , wherein the cutting piece is spaced apart from the plurality of contact pieces in a length direction of the electrical connector housing. 7 . The electrical connector housing according to claim 5 , wherein the cutting piece contacts the plurality of contact pieces in a length direction of the electrical connector housing.

8. An electrical connector housing according to claim 5 or 6, wherein the cutting blade is a single cutting blade and is made of metal, hard plastic or ceramic that is hard enough to cut insulated wires.

9. The electrical connector housing according to claim 1, wherein the equal channels are arranged in a lower row and an upper row and are arranged alternately in the two rows, and the narrow slots include a plurality of thin narrow slots, the electrical connector housing further includes a plurality of cutting blades accommodated in the equal thin narrow slots, each of the plurality of cutting blades is positioned with a corresponding one of the equal channels, wherein the equal cutting blades are spaced apart from each other in a lateral direction and are movable between a first position where the plurality of tips of the equal cutting blades are not located in the plurality of channels and a second position where the plurality of tips of the equal cutting blades are located in the plurality of channels. 10 . The electrical connector housing according to claim 9 , wherein the equally cut pieces are spaced apart from the plurality of contact pieces in a length direction of the electrical connector housing.

11. The electrical connector housing according to claim 9, wherein the equally cut pieces respectively contact the plurality of contact pieces in a length direction of the electrical connector housing.

12. The electrical connector housing according to claim 9, wherein the lower channel and the upper channel of the equal channels in the two rows are partially merged and communicated.

13. The electrical connector housing according to claim 9, wherein the plurality of cutting blades are made of metal.

14. The electrical connector housing according to claim 9, wherein the plurality of cutting pieces are integrally formed with the contact pieces.

15. The electrical connector housing according to claim 13 or 14, wherein the plurality of cut pieces made of metal are coated with insulating material.

16. A method for manufacturing an electrical connector, comprising: (a) providing an electrical connector housing according to claim 1; (b) providing a tool having a cutting blade and a crimping portion; (c) inserting each of a plurality of insulated wires from the rear opening of the electrical connector housing and passing each wire through a corresponding passage so that a front end of the plurality of insulated wires protrudes beyond the slot; and (d) simultaneously pressing the equal contact pieces of the electrical connector housing by the crimping portion of the tool and pressing the cutting piece of the tool into the narrow slot of the electrical connector housing, so that the equal contact pieces of the electrical connector housing move downward and pierce the insulating layers of the equal insulated wires to establish an electrical connection between the equal contact pieces and the equal insulated wires, and the cutting piece moves downward to cut off the portion of the equal insulated wires protruding beyond the narrow slot.

17. A method for manufacturing an electrical connector, comprising: (a) providing an electrical connector housing according to claim 5; (b) inserting each of a plurality of insulated wires from the rear opening of the electrical connector housing and passing each wire through a corresponding passage to protrude beyond the slot; and (c) pressing the contact piece and the cutting piece of the electrical connector housing at the same time, so that the contact piece moves downward and pierces the insulation layer of the insulated wire to establish an electrical connection between the contact piece and the insulated wire, and the cutting piece moves downward to cut off the portion of the insulated wire protruding beyond the narrow groove.

18. A method for manufacturing an electrical connector, comprising: (a) providing an electrical connector housing according to claim 9; (b) inserting each of a plurality of insulated wires from the rear opening of the electrical connector housing and passing each wire through a corresponding passage to protrude beyond the isothin slot; and (c) pressing the equal contact piece and the plurality of cutting pieces of the electrical connector housing simultaneously, so that the equal contact piece moves downward and pierces the insulation layer of the equal insulated wires to establish an electrical connection between the equal contact piece and the equal insulated wires, and the plurality of cutting pieces moves downward to correspondingly cut off the portions of the equal insulated wires protruding beyond the equal thin slots.

Images