JPH01294379A - Connection structure between compression contact terminal and circuit on circuit board - Google Patents

Abstract

PURPOSE: To assure rectilinear advancing property of a pressure connection terminal in an insertion space all times by making the pressure connection height of the insulation coated pressure connection portion of the pressure connection terminal freely adjustable. CONSTITUTION: The insulation coated pressure connection portion 5 of each pressure connection terminal 1 has at least right-left symmetrical pressure connection pieces 5a, 5b. The right-left symmetrical pressure connection pieces 5a, 5b which are caulked with the insulation coated portion 8 of a wire 6 therebetween are put in mutual contact at the upper end of the insulation coated portion 8 and then the upper ends of the pressure connection pieces 5a, 5b are raised upward and curved outward to be separated in mutually opposite directions for pressure connection. When the pressure connection terminal 1 is inserted into a mounting space 18 in a connector housing 17, the length (n) of part of the insulation coated pressure connected portion 5, raised and curved outward, is adjusted to adjust a pressure connection height H. In this way, the pressure connection terminal 1 is mounted in the insertion space 18 in the connector housing 17 while keeping its rectilinear advancing property.

Description

[Detailed description of the invention]

[Industrial Application Field] The present invention relates to a connection structure between a crimp terminal and a printed circuit board-E circuit, and more specifically, when the crimp terminal is attached to a connector housing, the valley crimp terminal is inserted while maintaining straightness. The present invention relates to an improvement in the connection structure between a crimp terminal and a printed circuit board so that the tip of each crimp terminal is brought into contact with the printed circuit board L-circuit as planned. [Prior Art] As is well known, a connection structure called board-in-type has conventionally been used to electrically connect a core wire of an electric wire to a circuit on a printed circuit board. That is, a crimp terminal in which the core wire of the electric wire is crimped to the core wire crimping part and the insulation coating part of the electric wire is crimped to the insulation coating crimping part, and a plurality of mounting spaces for the crimp terminals are formed side by side at a predetermined pitch. What is the connector housing? By inserting each of the plurality of crimp terminals from one open end of the connector housing into each terminal mounting space, the tip of each terminal facing outside from the other open end of the connector housing is printed. This is a connection structure between a crimp terminal and a printed circuit board, each of which is attached to an electric circuit on a circuit board. In this case, the shapes of conventional crimp terminals used in this connection structure are as shown in FIGS. 16 to 19. That is, the insulation coating crimping part 1' of the crimp terminal includes symmetrical U-shaped crimping pieces 2', 3', and the symmetrical crimp pieces 2', 3' are attached to the insulation coating part 5 of the electric wire 4'. After crimping the LL fitting pieces 2' and 3' with the crimping male teeth 6' inside, the tips 7' and 8' of each of the LL fitting pieces 2' and 3' are attached to the insulating coating part 5. ’ and fixed by folding and biting into the inside.An example of this state is shown in No. 18.
It is a diagram. [Problems to be Solved by the Invention] Although the above-mentioned prior art has a long practical use, it is also true that there are the following problems. That is,
If the left and right crimp 112' and the tips 7' and 8' of the 3'' are inserted inside and bent to fix the 1-11, if the wires to be crimp-connected are of different sizes, it will be easier to connect small wires. In this case, the crimp height 11' is small, and in the case of a human-sized wire, the crimp height 11' becomes large.In such a case, when each of these is attached to the same size connector housing 10', If the crimp height of the crimp terminal connected to the electric wire is suitable for the insertion space 9', when the crimp terminal connected to the small size electric wire is inserted, the 051 or 051 of the insertion space 9' After that, a gap h' is created.This is the same thing that occurs when the crimp terminals are crimped to different degrees even when the wires are of the same size.Then, a gap h' is created in the mounting space 9' of the connector housing. A problem arises in which the crimp terminal does not move straight.In other words, the crimp end tends to be slanted in the insertion space from the tail end to the tip.When this phenomenon occurs, the print It becomes difficult to attach the tip of each crimp terminal to the correct position of the circuit on the circuit board E. Therefore, the efficiency of board-in work decreases and the connection accuracy tends to decrease.Especially in recent years, wires and crimp terminals As the size of crimp terminals has become extremely small, it has become more difficult to attach them to each circuit of the printed circuit board F in the correct position even if the crimp terminal is slightly tilted. If this happens, the crimp terminal itself tends to tilt within the connector housing, and the crimp structure of the prior art is difficult to correct for this tilt.

【the purpose】

Therefore, one object of the present invention is to provide a connection structure that allows crimp terminals to be installed while maintaining their straightness when installed in the installation space of a connector housing.More specifically, By making it possible to freely adjust the crimping height of the insulation coating crimping part of the crimp terminal, the crimp height of the insulation coating crimping part of the crimp terminal can be freely adjusted, so that the crimp height of the insulation coating crimping part of the crimp terminal is always maintained. The purpose is to provide a means that can ensure the straightness of the crimp terminal in the insertion space.The other objective is to ensure the straightness of the crimp terminal so that the tip of the crimp terminal can be inserted into the printed circuit board circuit. It can be easily and accurately attached to the correct intended position 1n, and replacement 6-1
This provides a connection structure that makes it easy to accurately contact the tip of the terminal to a predetermined circuit position when each crimp end is inserted into the insertion space. [F steps for solving the problems] 1) In order to achieve the above [1], the present invention has the following technical means. That is, this will be explained using the reference numerals in the attached drawings corresponding to the embodiments. In the present invention, the core wire 7 of the electric wire 6 is connected to the core wire crimping part 4 by IE connection, and the insulation coating part of the electric wire 6 is connected to the insulation covering crimping part 5. 8 is crimped 161, and the mounting space 1 of the crimped end -f'l is arranged side by side at a predetermined pitch.
8, the connector housing 17 is formed with a plurality of
1- Insert each of the plurality of pressure blue ends 'FI' into each terminal mounting space 18 from one 'open end of the connector housing 17.
connector housing 17 by inserting each into
In the connection structure between the crimp end -l'l and the circuit on the printed circuit board, each contact end 2 facing the outside from the other open end is electrically connected to the electric circuit on the printed circuit board 16. The insulating coating lE bonding portion 5 of each crimp end 1 is provided with at least left-right symmetrical crimp pieces 5a, 5b, and the left-right symmetrical crimp pieces 5a, 5b are attached to the insulating coating portion 8 of the wire 1a6. After crimping the crimping pieces 5a and 5b against each other at the top end of the insulation coating 8, the crimping pieces 5a and 5b are
One end of each 5b is bent upward in the F direction and the other end is bent outward in the opposite direction to the U and crimped, and each IE crimp end is attached to the connector housing. 17 mounting spaces! By adjusting the length h of the outwardly curved portion of the insulating coating crimping portion 5 and adjusting the crimp height 11, each crimp This is a NII structure for connecting a crimp terminal and a printed circuit board circuit, characterized in that the end J'l can be inserted into the insertion space 18 of the connector housing 17 while maintaining straightness. 1 action] Since it is a 1-styl sulfate, the above insulation coating J'l- of the crimp terminal 1
The height h of the part of the fitting part 5 that is curved outward by q
Even if adjusted, the good crimpability to the wire insulation coating portion 8 is not impaired. Therefore, the crimp height II can be adjusted by 11 degrees. Therefore, if a gap is created when this IE contact terminal 1 is inserted into the insertion space 18 of the connector housing 17, the crimp height 11 is adjusted to an appropriate dimension to fill the connector housing insertion space 18. It is possible to prevent equal gaps from occurring in the front and rear. Thereby, the straightness of the crimp terminal 1 within the mounting space 18 in the connector housing 17 can be maintained. In this case, the left and right positions are determined without any deviation as in the conventional case. Therefore, it is possible to easily and accurately mount the electrical circuit on the printed circuit board at the correct position. [Embodiment] Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings FIGS. 1 to 15. First, the crimp end [J-body] will be described in detail with reference to the accompanying drawings FIGS. 1 to 4. Figures 1 and 2 show the crimp end p+ itself.
As in the prior art, a contact end 2 is formed at the tip, and then a resilient part 3, a core wire crimping part 4, and an insulation coating part crimping part 5 are formed in sequence at predetermined intervals toward the tail end. Figure 3 is Y- of Figure 2.
A sectional view taken along the Y line shows the pressure n part 5 of the two insulation coating parts, and has crimp pieces 5a and 5b with left and right symmetrical shapes extending from the bottom 5C to 612, and each crimp piece Each of 5a and 5b has a substantially U-shape from the bottom 5C to the medium heat portion 5d, and then bends slightly outward at the center portion 5d and curves outward as it goes upward. The tapered surface 5 is formed on the inside of the end 5e. Similarly, z-Zf in Figure 2
In this example, the core wire crimping part 4 shown in FIG.
Each crimp piece 4a, 4b has a substantially U-shaped shape of 1γ from the bottom 4c to the medium heat portion 4d. Bend slightly at the center part 4d, ■,
It forms a shape that expands outward as it goes toward the direction, and 1-1 t.
A tapered surface 4f is formed inside each end 4c. Next, FIGS. 5 to 11 show the core wire 7. of the wire 1;16 with respect to the crimp end F1. 1, which connects the insulation coating parts 8, and the E connection [the culm is shown. Type 10. Crimp T' consisting of a mold 11 and a presser foot 12;
Predetermined position of the column ll11? position to. FIG. 5 is a diagram shown to explain these correspondences in an easy-to-understand manner. In 1., the male tooth mold 10 for crimping the insulation coating has the following shape as shown in detail in FIG. That is, this tooth pattern 10 has linear first guide walls 11a, llb, symmetrically centered around the virtual center &IaN.
The curved second guide walls 12a, 12b and the sloped pressure bonding walls 13a, 13b are provided respectively. tA! In this example, the sloped crimp walls 13a and 13b form an angle θ with the phase ξ.
is set at 90°. The intersection 14a of the linear first guide wall 11a and the curved second guide wall 12a on the left side of the mouth, and the intersection point 14a of the straight first guide wall 11b and the curved second guide wall +2b on the right side.
The width between the intersections 14b is defined as the crimping width C, and if the centers of the curved surfaces of the curved second guide walls 12a and 12b are rl and 2, then the distance between the centers 1 and 2 of the L2 arc is j!IIF is determined by subtracting twice the arc length H from the crimp width C. That is, I'' = C-21? It is. It is desirable to set the arc length I< of the curved guide walls 12a and 12b to approximately R=CXO82 to 0.22. crimp end -f
In order to crimp and fix to the crimping part 5 of I, first attach the insulation coating part I.
The E-mounting type 10 is moved from the state shown in FIG. 6 to the state shown in FIG. Due to the movement, the left and right crimp pieces 5a and 5b of the crimp part 5
are the left and right linear first guide walls 11a. 11t), it is pulled inwards. This is because the linear first guide walls 11a and fib are tapered toward the outside. :11 Naturally, at this stage, the presser foot 12 is holding down the electric wire 6 itself. As the insulating liquid top part 10 moves forward and reaches the state shown in FIG.
-, a second guide wall 12a whose end 5e is a single curved surface; When guided close to the intersections 15a and 15b between +2b and the crimp walls 13a and I3b, the lE bonding pieces 5a and 5b approach the IJ, and the F side portions of the left and right crimp pieces 5a and 5b surround the insulation coating part 6. start. What is remarkable here, however, is that when comparing the position of the edge 5e with the part 5g that has begun to be enclosed, as shown in Figure 8-4, the edge 5e is outside the part 5g that has begun to be enclosed by a distance M. It's leaning towards the direction. When the male tooth mold 10 for the insulation coating part LE is moved downward from this state, the tip 5e is guided to the position of the crimp walls 13a and 13b. Furthermore, the tapering members 5r come into contact with the crimp walls 13a and 13b. Here, regarding the effect exerted from each of the crimp walls 13a and 13b on the left and right crimp pieces 5a and 5b of the crimp terminal, the intersection point 5d of each crimp piece of the crimp terminal is determined.
The two parts are moved inward toward each other, that is, they are displaced so as to surround the insulating coating part 8.
The part in the F direction from the intersection 5d, especially the 1st end 5c, is the crimp wall 13a.
, 13b, and is guided by the tabers Ij to be further displaced outward. As a result, the slightly upper portion of each crimp piece, including the intersection 5d, is brought into contact with the house. Moreover, since the inner side of the one end 5c is formed into a taper 5r, the shape change of the crimp end -r mentioned in 1- is carried out smoothly. After that, as shown in FIG. 10, when the male toothed die 10 for crimping the insulation coating is moved one more step, the toe ends 5c of the left and right crimping pieces are moved along the curved surfaces of the curved second guide walls 12a and 12b. The two sides are opened in opposite directions, and the two sides are rolled up. That is, the shape of the crimp part 5 crimped to the insulation coating part 8 is as follows. As shown in FIG. 9 or 1O, each crimp piece 5a, 5b
After contacting the insulating coating part 8 at the L end, the upper part of each of these lf fitting pieces &a and 5b is moved in the F direction.
111 is a shape in which one part of the F part is curved outward in opposite directions. The height of this part is indicated by a code. [1] The height of the crimp portion 5 of this insulating coating is indicated by 11. And 1. As is clear from "r%" in the table, the thinner the core wire 7 of the electric wire 6 is, the smaller the diameter of its insulation coating Ih8 becomes. f important “I [is,
1- The height h can be freely adjusted by changing the degree of crimping. In this case, even if the height h is changed, the crimp performance of the insulating coating will not be affected. This is because the insulation coating part 8 itself consists of 11 left and right pieces 5a and 5b.
This is because the close contact state of the left and right crimp pieces 5a, 5b does not change by changing the F2 height h. From this, regardless of the wire size, that is, even if the wire size is the same, by changing the degree of crimping, the height, that is, the crimping height 11 can be freely changed. On the other hand, the core wire crimping section 4 is crimped to the core wire 7 in the same manner as the insulation coating crimping section. Of course, the crimping mode of the core wire crimping portion 4 may be the same as that of the conventional example. Now, in order to connect a plurality of crimp terminals 1 to which the electric wires 6 are crimp-connected in this way to the electric circuit on the printed circuit board 16 by board-in-type, the parts shown in FIGS. 12 and 13 and the IL surface A connector housing 17 as shown in the partial perspective view shown in FIG. 14 is used. That is, the connector housing 17 has a plurality of crimp terminal insertion spaces 18 arranged side by side at predetermined intervals, and each of the insertion spaces 18 has an open end facing -h and external force. 1
-The spacing of the arrangement of notes varies greatly, and these days, many very small ones are put into practical use. Usually, each crimp end -r1 is installed in the insertion space 18 of this connector housing I7, and the contact end 2 of each terminal facing outside from the other open end of the installation space 18 is inserted into the through hole of the electric circuit of the printed circuit board. I try to do that. Conventionally, in such a connection structure, since the height h of L2 could not be adjusted, the crimp terminal l had a gap in front and behind it in the mounting space lB, that is, it was tilted, and the crimp terminal In order to properly attach each crimp terminal to the electric circuit on the printed circuit board, the posture of the crimp terminal must be adjusted to 11 γ when mounting the crimp terminal. However, it required a lot of time for the connection work.
F.? This problem can be solved in the case of the connection structure of the present invention using one J end. That is, in the example shown in FIG. 12, in FIG. 12, two wires of different sizes are connected to one connector housing 17.
The diagram shows two insulating coating crimped parts in correspondence with each other. More specifically, example Δ on the left shows an example in which the electric wire has a large diameter, and example B on the right shows an example in which the electric wire has a small diameter. However, even if the sizes are different like this, by adjusting the height h of the example and the height h of the example B,
Δ example. In all eight examples, the crimp height 11 can be made exclusive. More specifically, it is possible to make the crimping heights II of the wires the same even though they are different in size, without impairing the crimping performance of the insulating coating of each electric wire. Therefore, the distance L of the mounting space 18 of the connector housing 17 is
] Even if the dimensions are set to be the same for each wire of different size, the self-pressure front terminal connected to both wires can be fitted in a compatible state. This state is shown in Figures 13 and 1.
Figure 5. In other words, both the crimp terminal in Example 1 and the crimp terminal in Example 13 are connected to wires that are larger in size than phase U. It can be fitted to fit the mounting space with just the right amount. More specifically, the left and right sides of the crimp terminal can be regulated and installed without any backlash, as in the prior art, and the crimp terminal can also be regulated and installed with the same gap in the vertical direction as shown in FIG. From this, each crimp terminal 1 installed in each installation space 18 of the connector housing 17 as shown in FIG.
can all maintain straightness [). That is, each crimp end 7-1
is mounted in a straight line without any inclination from the tip to the tail end in the mounting space 18. As a result, each crimp terminal 1 in each mounting space 18 has the same posture,
``Breent circuit board'' - to the circuit - r regular + rE L,
＜To be brought into contact. If you change and go, each If
, when inserting the front end f into the mounting space, the contact end 2 of each end f
+E to each electrical circuit on the printed circuit board 167 as planned.
L <There is no need to make any adjustments to fit it. Therefore, the connection work becomes easier and IE is more reliable. In particular, as electric wire sizes are becoming smaller these days, even a slight inclination of the crimp terminal becomes larger than the tip for each electrical circuit, but this connection structure can solve this problem. [Effects] As described in detail below, according to the present invention, it is possible to provide a connection structure in which a crimp terminal can be mounted in a mounting space of a connector housing while maintaining its straightness. That is, the straightness of the entire crimp terminal within the connector housing mounting space can be maintained without impairing the good crimp performance of the insulation coating by the insulation coating crimping portion of the crimp end Y. Therefore,
When each of a plurality of crimp terminals is attached to a connector housing and attached to a circuit on a printed circuit board by board-in-type, there is no need to correct the posture of each crimp terminal one by one. Therefore, it has the advantage that the connection work can be carried out reliably and efficiently.

[Brief explanation of the drawing]

The attached drawings, FIGS. 1 to 15, show preferred embodiments of the present invention, in which FIG. 1 is a seven-sided view of the crimp terminal, FIG. 2 is a right side view of the crimp terminal, and FIG. A cross-sectional view of the insulation coating crimping part shown along the Y-Y line in the figure, FIG. 4 is a cross-sectional view of the core wire bottom part taken along the χ-Z line in FIG. A perspective view showing the correspondence between the terminal and each tooth type in a cylindrical manner, Figures 6 to 10Nz are diagrams sequentially showing the process of crimping the insulation coating, and Figure 11 is the male insulation coating crimping part. 11g4:! Figure 12 is a diagram for explaining one connector housing,
Figures 13 and 15 are diagrams showing the corresponding cross-sections of two insulation coating crimping parts with different crimping heights, respectively. Fig. 14 is a perspective view showing the straightness of the crimp terminal. Fig. 16 to Fig. 19 show conventional examples. Fig. 16 is a diagram showing the shape of the conventional insulation coating crimping part. Fig. 17 shows the crimping process. Explanatory drawings: Fig. 18 shows the location where the insulation coating of the wire is crimped; Fig. 19 shows the location where the device '1 is inserted into the mounting space of the connector housing; l in the figure indicates the 11" termination end. l
'-, 4 is the core wire bar neck, 5 is the insulation covering) υ11・neck,
6 is an electric wire, 7 is a core wire, 8 is an insulation coating, 16 is a printed circuit board, +7 is a connector housing, 18 is a mounting space, and 11 is a small crimping height. 3rd grade, 18th, 17th, 19th question, thread ILanzan tl:, -, F (Method) Leopard 1st year 7J1611 1, νXuojo Aigu 1.11 Bunsatsu Tono 11 of the matter Display 1986 Patent Application No. 291664172g! Connection structure between crimp terminal and printed circuit board T-circuit 3
Supplement I Relationship with Patent Applicant: 2222 Unirrington Court, Lisle, Illinois, United States of America Name: Morex Incorporated, Inc.
Lewis A. Hecht Nationality United States 4 Agent 220 Address 2 Takashima, Nishi-ku, Yokohama rrl l 1-25J
゛5 Supplementary 1F instruction with Ll I'July 1999
41J6 Column 7 of the [Name of the Invention] item in the subject specification of Supplement iE Contents of Supplement 1F

Claims (1)

[Scope of Claims] A crimp terminal 1 having a core wire 7 of an electric wire 6 crimped and connected to a core wire crimping portion 4 and an insulation coating portion 8 of an electric wire 6 crimped and fixed to an insulation coating crimping portion 5 is arranged side by side at a predetermined pitch. A connector housing 17 in which a plurality of mounting spaces 18 for the crimp terminals 1 are formed.
By inserting each of the plurality of crimp terminals 1 into each terminal mounting space 18 from one open end of the connector housing 17, each contact facing the outside from the other open end of the connector housing 17 is inserted. In the connection structure between the crimp terminal 1 and the circuit on the printed circuit board, in which the ends 2 are electrically connected to the electric circuits of the printed circuit board 16, the insulation coating crimp portions 5 of each crimp terminal 1 are connected at least to the left and right sides. It has symmetrical crimp pieces 5a, 5b, and crimps the left-right symmetrical crimp pieces 5a, 5b with the insulation sheathing part 8 of the electric wire 6 inside, so that each crimp piece 5a, 5b is placed on the upper end of the insulation sheathing part 8. After the crimp terminals 5a and 5b are brought into contact with each other, the upper end portions of the crimp terminals 5a and 5b are raised upward, and the upper end portions are bent outward in opposite directions to be crimped. 1 is inserted into each mounting space 18 of the connector housing 17, the crimp height H is adjusted by adjusting the length h of the rising and outwardly curved portion of the insulation coating crimping part 5. A connection structure between a crimp terminal and a circuit on a printed circuit board, characterized in that each crimp terminal 1 can be inserted into an insertion space 18 of a connector housing 17 while maintaining straightness.