A piercing terminal

Abstract

The present invention discloses a puncture terminal, comprising a plug-in portion, a crimping portion and a clamping portion. The cross-section of the crimping portion in the transverse width direction is U-shaped, and the crimping portion further comprises a plurality of puncture mechanisms, which are arranged along the length direction of the inner wall of the crimping portion. When the U-shaped crimping portion is crimping the enameled wire, the puncture tips on both sides of the trapezoidal groove can peel off the coating of the enameled wire, fully exposing the inner core of the wire. At the same time, the outer side surface of the puncture tip is arranged as an outward arc-shaped protrusion, which can increase the contact area between the puncture tip protrusion and the inner core of the enameled wire, thereby improving the current transmission efficiency. A support point is provided in the arc-shaped groove, which can not only provide a certain supporting force when the puncture tip contacts the enameled wire, but also produce a supporting effect after the puncture tip is deformed, thereby improving the close contact effect between the outer side of the puncture tip and the inner core of the enameled wire. The support point and the arc-shaped groove of the present invention are more cleverly arranged, which improves the current conduction efficiency and makes the inner core of the enameled wire and the puncture tip contact more closely.

Description

Technical Field

[0001] The present invention relates to the technical field of connectors, and in particular to a piercing terminal. Background Art

[0002] Enameled wire is a primary raw material for products such as motors, electrical appliances, and household appliances. The sustained and rapid growth of the power industry in recent years, coupled with the rapid development of household appliances, has broadened the application scope of enameled wire. The lacquer coating on the outer layer of enameled wire primarily provides corrosion and oxidation resistance in the operating environment. Enameled wire is typically stripped mechanically, manually, or chemically, and then the stripped wire and lead wire are connected by welding. This traditional connection process is not only inefficient but also prone to problems such as cold solder joints and the inability to achieve a good seal in the stripped area. The copper wire within the lacquer is susceptible to corrosion and oxidation, which can damage motor performance and affect product performance.

[0003] In the prior art, a terminal with trapezoidal grooves disposed transversely on its inner surface is used. During use, the enameled wire and lead wire are placed in the terminal and compressed by a crimping machine. The transverse trapezoidal grooves pierce the enameled wire's enamel layer, thereby connecting the enameled wire and lead wire. However, although the existing structure is simple to manufacture, due to the arrangement of the groove structure, when the enameled wire is crimped, the tip of the groove pierces the enameled wire without peeling it off. This only allows the inner copper wire of the enameled wire to contact the tip of the groove, resulting in a small contact area and the possibility of a loose connection, which affects the efficiency of the power connection. This is particularly true for products requiring high precision, as it improves the stability of the connection between the enameled wire and the terminal.

[0004] Therefore, how to provide a new type of piercing terminal that can peel off a portion of the enameled wire and extend the contact area between the tooth groove tip and the enameled wire is a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0005] To this end, the present invention provides a piercing terminal to solve the related technical problems existing in the prior art.

[0006] In order to achieve the above object, the present invention provides the following technical solutions:

[0007] A piercing terminal includes a connecting portion for connecting a plug-in piece, a crimping portion for connecting an enameled wire, and a clamping portion provided at the end of the crimping portion. The crimping portion has a U-shaped cross-section in the horizontal width direction and also includes multiple piercing mechanisms provided on the inner wall of the crimping portion. The multiple piercing mechanisms are arranged along the length direction of the inner wall of the crimping portion.

[0008] Furthermore, the puncture mechanism includes a trapezoidal groove provided on the inner wall of the crimping portion, a puncture tip symmetrically arranged at the upper end of the trapezoidal groove, and an arcuate groove provided on the inner side wall of the trapezoidal groove;

[0009] The arc-shaped groove is arranged in the lower area of ​​the puncture tip, the inner side wall of the puncture tip is coplanar with the inner side wall of the trapezoidal groove, and the outer side of the puncture tip is convex outward in an arc shape.

[0010] Furthermore, it also includes a support point, which is arranged along the length direction of the arc groove, the lower end of the support point is fixedly connected to the lower end of the arc groove, and the upper end of the support point is elastically abutted against the upper end of the arc groove.

[0011] Furthermore, it also includes sliding grooves and abutment sliding points. The inner wall of the arc groove is provided with multiple sliding grooves arranged along the circumference of the arc groove. The multiple sliding grooves are arranged along the length direction of the arc groove. The top of the support point is provided with an abutment sliding point that cooperates with the sliding groove. The abutment sliding point elastically abuts against the sliding groove.

[0012] Furthermore, the support point includes at least a first state, and in the first state, the upper end of the support point elastically abuts against the upper end of the arc-shaped groove;

[0013] It also includes a second state, and in the second state, the puncture tip and the support point are both inclined toward the inner cavity of the trapezoidal groove, and the support point elastically supports the puncture tip.

[0014] Furthermore, the holding portion includes holding pieces that are staggered on the left and right sides.

[0015] Furthermore, an upwardly protruding extrusion boss is provided on the inner bottom of the connector.

[0016] The present invention has the following advantages:

[0017] Compared with the prior art, the technical solution applied for in the present invention improves the puncture mechanism, so that when the U-shaped crimping part crimps the enameled wire, the puncture tips on both sides of the trapezoidal groove can deform after contacting the enameled wire and peel off the coating, thereby fully exposing the inner conductor of the enameled wire. At the same time, the outer side surface of the puncture tip is set to be an outward arc-shaped bulge, so as to increase the contact area between the puncture tip bulge and the inner core of the enameled wire, thereby improving the current transmission efficiency.

[0018] At the same time, a support point is set in the arc groove, which can not only provide a certain supporting force when the puncture tip contacts the enameled wire, but also produce a supporting effect after the puncture tip is deformed, thereby improving the close contact effect between the outer side of the puncture tip and the inner core of the enameled wire.

[0019] The present invention refines the design of the existing terminal structure, and the support points and the arc grooves are more cleverly arranged, thereby improving the current conduction efficiency and making the contact between the inner core of the enameled wire and the puncture tip closer. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the embodiments or the description of the prior art. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other implementation drawings based on the provided drawings without inventive effort.

[0021] The structures, proportions, sizes, etc. illustrated in this specification are intended only to complement the contents disclosed herein and to facilitate understanding and reading by persons familiar with the art. They are not intended to limit the conditions under which the present invention may be implemented and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in sizes, without affecting the efficacy and objectives of the present invention, shall still fall within the scope of the technical contents disclosed herein.

[0022] Figure 1 A top view of a piercing terminal provided in an embodiment of the present invention;

[0023] Figure 2 The embodiment of the present invention provides Figure 1 Middle BB section view;

[0024] Figure 3 The embodiment of the present invention provides Figure 1 Middle CC section view;

[0025] Figure 4 The embodiment of the present invention provides Figure 3 A partial enlarged view of point D in the middle;

[0026] Figure 5 The embodiment of the present invention provides Figure 4 A partial enlarged view of the middle arc groove;

[0027] Figure 6 A front view of a piercing terminal provided by an embodiment of the present invention;

[0028] Figure 7 The embodiment of the present invention provides Figure 6 Middle AA section view;

[0029] In the picture:

[0030] 1. Connecting part; 2. Crimping part; 3. Clamping part; 301. Clamping piece; 4. Piercing mechanism; 401. Trapezoidal groove; 402. Piercing tip; 403. Arc groove; 5. Support point; 6. Sliding groove; 7. Abutting sliding point; 8. Extrusion boss. DETAILED DESCRIPTION

[0031] The following describes the implementation of the present invention using specific embodiments. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. Obviously, the embodiments described are only a portion of the present invention, not all of it. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0032] To address the related technical problems in the prior art, the present invention provides a piercing terminal that is improved upon the existing terminal to achieve the stripping function of the enameled wire while increasing the contact area between the terminal and the inner core of the enameled wire, thereby facilitating current transmission. The specific improvements are as follows:

[0033] The piercing terminal of this embodiment, such as Figure 1-7 As shown, it includes a plug-in portion 1 for connecting the plug-in piece, a crimping portion 2 for connecting the enameled wire, and a clamping portion 3 provided at the end of the crimping portion 2. The main structure of the piercing terminal is composed of the above-mentioned plug-in portion, crimping portion 2, and clamping portion 3. The plug-in portion 1 is used to electrically connect with the metal plug-in piece to achieve connection; the clamping portion 3 is used to clamp the entire structure of the enameled wire; the crimping portion 2 is provided with a piercing tip to achieve contact and electrical conduction with the inner core of the enameled wire. In order to achieve the wire stripping function when the crimping portion 2 is crimping the enameled wire, the present application also improves the crimping portion 2 and the structure provided thereon, as follows:

[0034] like Figure 3 As shown, the cross-section of the crimping portion 2 in the transverse width direction is U-shaped, and further includes a plurality of puncturing mechanisms 4 provided on the inner wall of the crimping portion 2. Each puncturing mechanism 4 is provided along the direction of the U-shaped cross-section, and the plurality of puncturing mechanisms 4 are provided along the length direction of the inner wall of the crimping portion 2. During use, the enameled wire is inserted into the U-shaped crimping portion 2, and the crimping portion 2 is deformed by crimping with a crimping machine. The puncturing mechanisms 4 on the inner wall of the deformed crimping portion 2 can peel off the enamel layer on the outer wall of the enameled wire, thereby increasing the peeling area of ​​the enameled wire compared to the prior art, and at the same time increasing the contact area between the crimping portion 2 and the inner core of the enameled wire.

[0035] Specifically, the puncturing mechanism 4 includes a trapezoidal groove 401 formed on the inner wall of the crimping portion 2 (the cross-section of the puncturing mechanism 4 is in the shape of the trapezoidal groove 401), a puncturing tip 402 symmetrically disposed at the upper end of the trapezoidal groove 401, and an arcuate groove 403 disposed on the inner sidewall of the trapezoidal groove 401. Specifically, the arcuate groove 403 is disposed below the puncturing tip 402, with the inner sidewall of the puncturing tip 402 being coplanar with the inner sidewall of the trapezoidal groove 401, and the outer side of the puncturing tip 402 protruding outward in an arc shape. Specifically, during use, the puncturing mechanism 4 is squeezed inward by the crimping portion 2, and the symmetrically disposed puncturing tips 402 first contact the enameled wire. As the squeezing action continues, the symmetrical puncturing tips 402 deform toward each other, thereby peeling the paint layer on the outer wall of the enameled wire toward the center and pressing it downward into the trapezoidal groove 401. The arrangement of the arcuate groove 403 provides the necessary space for the deformation of the puncturing tip 402. At the same time, as the puncture tip 402 deforms, the outer wall of the puncture tip 402 gradually contacts the inner core of the enameled wire. Since the outer wall of the puncture tip 402 is an arc-shaped protrusion, it can contact the flexible inner core of the enameled wire more closely, and the contact area between the outer wall of the puncture tip 402 and the inner core of the enameled wire is larger.

[0036] Based on the above embodiment, the use effect of the piercing terminal is greatly improved by improving the structure of the piercing mechanism 4. In order to further improve the use stability of the piercing terminal and support the piercing tip 402 after deformation, the following embodiment is also provided.

[0037] Based on the above structure, a support point 5 is further provided. The support point 5 is arranged along the length of the arc-shaped groove 403. The lower end of the support point 5 is fixedly connected to the lower end of the arc-shaped groove 403, and the upper end of the support point 5 is elastically abutted against the upper end of the arc-shaped groove 403. In this embodiment, the support point 5 is fixed to the lower end of the arc-shaped groove 403 by welding. At the same time, during the processing, the support point 5 is elastically in contact with the upper end of the arc-shaped groove 403. Therefore, even when the piercing tip 402 is deformed, a certain supporting force can be generated, thereby ensuring that the piercing tip 402 can pierce the outer lacquer layer of the enameled wire before peeling.

[0038] In order to further improve the guiding performance of the support point 5 when deformation occurs, a sliding groove 6 and a contact sliding point 7 are further provided. Figure 4 and 5 As shown, the inner wall of the arcuate groove 403 is provided with a plurality of sliding grooves 6 arranged along the circumference of the arcuate groove 403. The plurality of sliding grooves 6 are arranged along the length of the arcuate groove 403. The top of the support point 5 is provided with an abutting sliding point 7 that cooperates with the sliding groove 6. The abutting sliding point 7 elastically abuts within the sliding groove 6. Therefore, when the puncturing tip 402 deforms and causes the support point 5 to slide out of the arcuate groove 403, the cooperation between the abutting sliding point 7 and the sliding groove 6 can greatly improve the guiding performance of the deformation of the support point 5.

[0039] It should be noted that when processing the arc groove 403, the sliding groove 6 structure therein is processed first, and then the abutting sliding point 7 is processed at the upper end of the support point 5. When welding the support point 5, the abutting sliding point 7 is aligned with the sliding groove 6 that matches it.

[0040] Based on the above structure, during specific use, the support point 5 includes at least a first state, and in the first state, the upper end of the support point 5 elastically abuts against the upper end of the arc-shaped groove 403; it also includes a second state, and in the second state, the puncture tip 402 and the support point 5 are both inclined toward the inner cavity of the trapezoidal groove 401, and the support point 5 elastically supports the puncture tip 402.

[0041] At the same time, in the embodiments provided in this application, Figure 6 As shown, the holding portion 3 includes holding pieces 301 staggered on the left and right. An upwardly protruding extrusion boss 8 is provided at the bottom of the connector 1.

[0042] Compared with the prior art, the technical solution applied for in the present invention improves the puncturing mechanism 4, so that when the U-shaped crimping part 2 crimps the enameled wire, the puncturing tips 402 on both sides of the trapezoidal groove 401 can deform and peel off the coating after contacting the enameled wire, thereby fully exposing the inner conductor of the enameled wire. At the same time, the outer side surface of the puncturing tip 402 is set to be an outward arc-shaped protrusion, so as to increase the contact area between the protrusion of the puncturing tip 402 and the inner core of the enameled wire, thereby improving the current transmission efficiency.

[0043] At the same time, a support point 5 is set in the arc groove 403, which can not only provide a certain supporting force when the puncture tip 402 contacts the enameled wire, but also produce a supporting effect after the puncture tip 402 is deformed, thereby improving the close contact effect between the outer side of the puncture tip 402 and the inner core of the enameled wire.

[0044] The present invention refines the design of the existing terminal structure, and the support point 5 and the arc groove 403 are more cleverly arranged, thereby improving the current conduction efficiency and making the contact between the enameled wire core and the piercing tip 402 closer.

[0045] Although the present invention has been described in detail above using general descriptions and specific embodiments, it will be apparent to those skilled in the art that modifications and improvements may be made thereto. Therefore, such modifications and improvements, without departing from the spirit of the present invention, are intended to be within the scope of protection claimed herein.

Claims

1. A piercing terminal, comprising a plug-in portion for connecting a plug, a crimping portion for connecting an enameled wire, and a clamping portion provided at the end of the crimping portion, characterized in that: The cross section of the crimping portion in the transverse direction is U-shaped, and further comprises a plurality of puncturing mechanisms arranged on the inner wall of the crimping portion, wherein the plurality of puncturing mechanisms are arranged along the length direction of the inner wall of the crimping portion; The puncture mechanism includes a trapezoidal groove provided on the inner wall of the crimping portion, a puncture tip symmetrically arranged at the upper end of the trapezoidal groove, and an arcuate groove provided on the inner side wall of the trapezoidal groove; The arc-shaped groove is provided in the lower area of ​​the puncture tip, the inner side wall of the puncture tip is coplanar with the inner side wall of the trapezoidal groove, and the outer side of the puncture tip is convex outward in an arc shape; It also includes a support point, which is arranged along the length direction of the arc-shaped groove, the lower end of the support point is fixedly connected to the lower end of the arc-shaped groove, and the upper end of the support point is elastically abutted against the upper end of the arc-shaped groove; It also includes sliding grooves and abutment sliding points. The inner wall of the arc groove is provided with multiple sliding grooves arranged along the circumference of the arc groove. The multiple sliding grooves are arranged along the length direction of the arc groove. The top of the support point is provided with an abutment sliding point that cooperates with the sliding groove. The abutment sliding point elastically abuts against the sliding groove.

2. The piercing terminal according to claim 1, wherein: The support point includes at least a first state, and in the first state, the upper end of the support point elastically abuts against the upper end of the arc-shaped groove; It also includes a second state, and in the second state, the puncture tip and the support point are both inclined toward the inner cavity of the trapezoidal groove, and the support point elastically supports the puncture tip.

3. The piercing terminal according to claim 1, wherein: The holding portion includes holding pieces that are staggered on the left and right sides.

4. The piercing terminal according to claim 1, wherein: An upwardly protruding extrusion boss is provided at the inner bottom of the connecting part.

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