CN210779072U

CN210779072U - Fisheye terminal with chamfer of crimping surface connected by two sections of arcs with different radiuses

Info

Publication number: CN210779072U
Application number: CN201921375875.4U
Authority: CN
Inventors: 施金城
Original assignee: Dongguan Zhongzheng Electronics Co Ltd
Current assignee: Dongguan Zhongzheng Electronics Co Ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-06-16
Anticipated expiration: 2029-08-22

Abstract

The utility model discloses a fisheye terminal that two sections different radius circular arcs of chamfer use of crimping face are connected, including shoulder and the crimping portion that sets gradually by going up, the front and back both sides face and the left and right sides face of crimping portion are the horizontal plane, be connected through chamfer R1 and chamfer R2 between leading flank and the left surface, chamfer R1 is different with chamfer R2, be connected through chamfer R3 and chamfer R4 between trailing flank and the left surface, be connected through chamfer R5 and chamfer R6 between leading flank and the right surface, be connected through chamfer R7 and chamfer R8 between trailing flank and the right surface. Through each corner with crimping portion is connected by two chamfers, and two chamfers are different, form two sections circular arc designs, under the condition that does not change fisheye overall dimension tolerance, fisheye hole dimensional tolerance and fisheye length, guide area, root all unchangeable, produce through adjusting the different radiuses of chamfer circular arc, protect the cladding material more portably, also satisfy the plug power requirement simultaneously.

Description

Fisheye terminal with chamfer of crimping surface connected by two sections of arcs with different radiuses

Technical Field

The utility model belongs to the technical field of the connector technique and specifically relates to indicate a fisheye terminal that two sections different radius circular arcs of chamfer use of crimping face are connected.

Background

The fish-eye terminal has been applied to electronic communication for more than twenty years, and the thickness of the terminal material is relatively thin, generally less than 0.4mm, because the current carried by the metal conductive material of the electronic communication is generally small, the upper end of the terminal material is naturally punched into an R-shaped angle, and the lower end of the terminal material is chamfered into an R-shaped chamfer with a corresponding size.

In recent years, with the global automobile industry using a large number of automobile body electronic control integrated modules (BCM), the electronic functions of automobiles are more and more, the data communication speed is faster and faster, the control function is stronger and stronger, bus type networking is promoted, and the BCM becomes an important development trend in the future.

In order to meet the requirement of an automobile electronic terminal on carrying current, the material thickness of the terminal is generally increased to be within the range of 0.4-0.8 mm, the matching aperture of a circuit board is relatively increased, and the fit degree of a terminal crimping surface and a circuit board circular hole is required to be high under the condition of large-current application so as to reduce the resistance and increase the transmission efficiency of electric signals.

The tradition is according to material thickness to the processing of terminal crimping face, and circuit board complex round hole size determines an R angle, carries out the chamfer to both ends about the fisheye terminal, because the reason of stamping die precision, punch press precision and material thickness precision, according to these fluctuations, can synthesize the tolerance zone of confirming an R value, the quality management and control of the terminal of being convenient for.

The application requirement of auto industry fish-eye terminal is that the circuit board round hole can plate one deck copper, fish-eye terminal copper material also can be made nickel end and plate tin again, insert in the circuit board round hole when the fish-eye terminal, the crimping face of fish-eye terminal is pressed, elastic deformation appears in the fish-eye, produce forward extrusion force, because round hole and terminal are pressed each other, the cladding material is softer again, the attenuation after the compression, when the fish-eye terminal appearance was walked the tolerance, the cladding material is pressed the attenuation more obvious, the cladding material is thinnest limited under the electrical property requirement, otherwise will influence the transmission and life and the stability of electric signal, cladding material a, b have surpassed minimum requirement as shown in figure 3.

After the fisheye terminal is inserted into the circular hole of the circuit board and is compressed elastically to the maximum, in order to meet the requirement of the thickness of the plating layer between the four R corners of the fisheye terminal and the circular hole, the conventional method is to increase the R corner, as shown in fig. 4, when the R corner is increased to the upper design limit, although the requirement of the thickness of the plating layers a and b is met, the forward elastic pressure is reduced due to the reduction of the forward stressed area, so that the insertion and extraction force is reduced, as shown in fig. 5, the insertion and extraction force of the fisheye terminal is shown in a waveform, and the insertion force and the extraction force have more strict requirements, which are the most important physical performance requirements of the fisheye terminal connection mode.

SUMMERY OF THE UTILITY MODEL

In view of the above, the present invention provides a fisheye terminal having a crimping surface chamfered by two sections of circular arcs with different radii, which can protect a plating layer and meet the requirement of insertion/extraction force.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the fisheye terminal is characterized in that the crimping part is a hollow flat body, the front side face, the rear side face, the left side face and the right side face of the crimping part are horizontal planes, the front side face and the left side face are connected through a chamfer R1 and a chamfer R2, the chamfer R1 is different from the chamfer R2, the rear side face is connected with the left side face through a chamfer R3 and a chamfer R4, the chamfer R3 is different from the chamfer R4, the front side face is connected with the right side face through a chamfer R5 and a chamfer R6, the chamfer R5 is different from the chamfer R6, the rear side face is connected with the right side face through a chamfer R7 and a chamfer R8, and the chamfer R7 is different from the chamfer R8.

Preferably, the chamfer R2 > chamfer R1, chamfer R3 > chamfer R4, chamfer R6 > chamfer R5 and chamfer R7 > chamfer R8.

Preferably, the chamfer R1, the chamfer R4, the chamfer R5 and the chamfer R8 are the same or different, and the chamfer R2, the chamfer R3, the chamfer R6 and the chamfer R7 are the same or different.

Compared with the prior art, the utility model obvious advantage and beneficial effect have, particularly, can know by above-mentioned technical scheme:

through each corner with crimping portion is connected by two chamfers, and two chamfers are different, form two sections circular arc designs, under the condition that does not change fisheye overall dimension tolerance, fisheye hole dimensional tolerance and fisheye length, guide area, root all unchangeable, produce through adjusting the different radiuses of chamfer circular arc, protect the cladding material more portably, also satisfy the plug power requirement simultaneously.

To more clearly illustrate the structural features and functions of the present invention, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments:

drawings

FIG. 1 is a partial front view of a preferred embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic diagram of the conventional terminal with the plating layers a, b exceeding the minimum requirements

Fig. 4 is a schematic view of a conventional terminal when the R angle increases to the upper design limit;

FIG. 5 is a schematic diagram illustrating the testing of the insertion and extraction force according to the preferred embodiment of the present invention;

fig. 6 is a schematic diagram of the tolerance of the external dimensions of the terminal according to the preferred embodiment of the present invention.

The attached drawings indicate the following:

10. shoulder 20, crimping part

Detailed Description

Referring to fig. 1 and 2, a specific structure of a preferred embodiment of the present invention is shown, which includes a shoulder 10 and a crimping portion 20 arranged in sequence from bottom to top.

The crimping part 20 is a hollow flat body, the front side surface, the rear side surface, the left side surface and the right side surface of the crimping part 20 are horizontal surfaces, the front side surface is connected with the left side surface through a chamfer R1 and a chamfer R2, the chamfer R1 is different from the chamfer R2, the rear side surface is connected with the left side surface through a chamfer R3 and a chamfer R4, the chamfer R3 is different from the chamfer R4, the front side surface is connected with the right side surface through a chamfer R5 and a chamfer R6, the chamfer R5 is different from the chamfer R6, the rear side surface is connected with the right side surface through a chamfer R7 and a chamfer R8, and the chamfer R7 is different from the chamfer. In the embodiment, the chamfer R2 > chamfer R1, the chamfer R3 > chamfer R4, the chamfer R6 > chamfer R5 and the chamfer R7 > chamfer R8. The chamfer R1, the chamfer R4, the chamfer R5 and the chamfer R8 are the same or different, and the chamfer R2, the chamfer R3, the chamfer R6 and the chamfer R7 are the same or different.

As shown in fig. 2, taking the upper left corner R as an example, the corner R is divided into two circular arcs of a chamfer R1 and a chamfer R2, the chamfer R1 maintains the original design value and tolerance requirements, and the chamfer R2 is larger than the chamfer R1 but the maximum value is limited by the shortest requirement of the middle straight body part d to ensure sufficient forward elastic pressure, as shown in fig. 6.

The utility model discloses a design key is: through each corner with crimping portion is connected by two chamfers, and two chamfers are different, form two sections circular arc designs, under the condition that does not change fisheye overall dimension tolerance, fisheye hole dimensional tolerance and fisheye length, guide area, root all unchangeable, produce through adjusting the different radiuses of chamfer circular arc, protect the cladding material more portably, also satisfy the plug power requirement simultaneously.

The technical principle of the present invention is described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without any inventive effort, which would fall within the scope of the present invention.

Claims

1. The fisheye terminal is characterized in that the crimping part is a hollow flat body, the front side face, the rear side face, the left side face and the right side face of the crimping part are horizontal planes, the front side face and the left side face are connected through a chamfer R1 and a chamfer R2, the chamfer R1 is different from the chamfer R2, the rear side face is connected with the left side face through a chamfer R3 and a chamfer R4, the chamfer R3 is different from the chamfer R4, the front side face is connected with the right side face through a chamfer R5 and a chamfer R6, the chamfer R5 is different from the chamfer R6, the rear side face is connected with the right side face through a chamfer R7 and a chamfer R8, and the chamfer R7 is different from the chamfer R8.

2. The fisheye terminal of claim 1 wherein the chamfer of the crimp face is formed by joining two arcs of different radii, wherein: the chamfer R2 is greater than the chamfer R1, the chamfer R3 is greater than the chamfer R4, the chamfer R6 is greater than the chamfer R5, and the chamfer R7 is greater than the chamfer R8.

3. The fisheye terminal of claim 1 wherein the chamfer of the crimp face is formed by joining two arcs of different radii, wherein: the chamfer R1, the chamfer R4, the chamfer R5 and the chamfer R8 are the same or different, and the chamfer R2, the chamfer R3, the chamfer R6 and the chamfer R7 are the same or different.