JP5162221B2 - Metal plate for harness terminal and harness processing method - Google Patents

Description

  The present invention relates to terminal processing of a flat multicore coaxial harness.

  In recent years, electronic devices typified by mobile phones have been rapidly reduced in size, weight and functionality. As a result, the flat multi-core coaxial harness used for the internal wiring is also reduced in size at the coupling portion with the substrate, the diameter of the coaxial cable is reduced, and the pitch between the cables is also reduced. Recently, the product cycle has become shorter year by year, and improvement in productivity has been demanded.

  FIG. 5 is a perspective view showing a terminal portion of a conventional general flat multi-core coaxial harness. As shown in FIG. 5, in a flat multi-core coaxial harness (hereinafter, appropriately referred to as a harness) 100, a plurality of coaxial cables (hereinafter, appropriately referred to as cables) 1 are arranged in parallel at an equal pitch and temporarily fixed with a plastic tape 2. Thereafter, the cable lead-out process is performed, and the terminal is processed in a lump by soldering the external conductor 6 partially exposed in each cable 1 between the two metal plates 3 and soldering together. Thereafter, the central conductor 4 of the harness 100 is soldered to a connection terminal such as an FPC, a board, or a connector. In addition, cable lead-out processing means removing each insulator covering the cable at the tip portion of the cable and exposing part of the center conductor 4 and the outer conductor 6.

  FIG. 6 is a front view showing an arrangement when external conductors are collectively soldered with a metal plate, (a) is a front view showing a state before soldering, and (b) is a front view showing a state after soldering. It is. Here, FIGS. 6A and 6B correspond to views as seen from the direction of arrow A shown in FIG. Further, the coaxial cable 1 is coated with an inner insulator 5 around a central conductor 4, an outer conductor 6 in which a plurality of conductors are twisted is coated on the outer side, and an outer insulator 7 called a jacket on the outer side. It has a covered structure.

  As shown in FIG. 6 (a), each metal plate 3 has a solder plate 8 set inside thereof and is arranged vertically with the external conductor 6 interposed therebetween. In this state, by pressing with a heating head (not shown) in the direction of the arrow, as shown in FIG. 6B, the space between the two metal plates 3 and the external conductor 6 is filled with solder 8a, and each cable 1 The partially exposed outer conductor 6 is collectively soldered by the two metal plates 3.

As a conventional technique related to the terminal processing of such a flat multi-core coaxial harness, the outer conductor on the end side is further removed from the metal plate, and the exposed insulating core is fixed at a predetermined pitch with a plastic tape. There has been proposed a processed wire product in which the central conductor is exposed by shifting the insulation in the peeling direction (see Patent Document 1).
Japanese Patent Laid-Open No. 10-144145

  In the conventional terminal processing, when the outer conductors 6 of the cables 1 are soldered together with the metal plate 3, a jig having a plurality of positioning pins arranged in a comb shape is used to make the cables 1 have an equal pitch. The center conductor 4 is inserted between the positioning pins, or the outer conductor 6 of the cable 1 is placed on the metal plate 3, and then the pitch is manually adjusted. However, in the pitch adjustment using the jig as described above, the center conductor 4 may be damaged when the center conductor 4 is inserted between the positioning pins. In addition, manual pitch adjustment takes time. In addition, the cable itself becomes soft due to the reduction in the diameter of the cable, and when the external conductor 6 is collectively soldered with the metal plate 3, the cable 1 may move to the left and right due to the force of the solder 8a flowing. If the cable 1 moves in this way, then it is necessary to adjust the pitch in the connecting process with the FPC, the substrate, etc., and the work takes time. In addition, when setting the solder plate 8 inside the metal plate 3, it is necessary to adjust so that the position of the solder plate 8 does not shift, which is also a factor that takes time.

  Further, since the heating press by the heating head is performed from the upper side to the lower side, there is a problem that it takes time for the heat from the upper metal plate 3 to be transmitted to the lower metal plate 3. In addition, when the internal insulator 5 is pressed more than necessary during the heating press by the heating head, the internal insulator 5 may be crushed, resulting in insulation failure between the external conductor 6 and the central conductor 4.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a metal plate for a harness terminal and a harness processing method capable of efficiently performing terminal processing without applying a load to the cable. There is to do.

  In order to achieve the above object, the invention according to claim 1 is directed to a flat multi-core coaxial harness terminal in which a plurality of coaxial cables are arranged in parallel at equal intervals. A metal plate for a harness terminal for batch soldering, wherein a plurality of convex ribs are formed at both ends in the width direction of the metal plate as a substrate at the same arrangement interval as the coaxial cable along the longitudinal direction of the metal plate The rib spacing W in the longitudinal direction of the metal plate is D + α (D: outer diameter of the outer conductor, α: outer diameter tolerance of the outer conductor), and the height h from the upper surface of the metal plate is 0.5D-1 It is comprised so that it may become 5D, and it makes it a summary to contain the external conductor in which each said coaxial cable was partially exposed between the ribs in the longitudinal direction of the said metal plate.

  The gist of the invention according to claim 2 is that, in claim 1, the height h of the rib is 0.95D to 1.05D.

  The invention according to claim 3 is the metal for a harness terminal according to claim 1, wherein the metal plate is formed at both ends in the width direction of the metal plate and at the end in the longitudinal direction of the metal plate. The gist is to have positioning ribs for restricting movement of the harness terminal metal plate in the width direction when the plates are arranged to face each other.

In order to achieve the above object, the invention according to claim 4 is a harness processing method using the metal plate for a harness terminal according to any one of claims 1 to 3, and is disposed on the lower side. The step of setting a solder plate on the upper surface of the metal plate of the harness terminal metal plate, and a part of the exposed external conductor of each coaxial cable of the flat multi-core coaxial harness, for the harness terminal disposed below The step of housing between the ribs of the metal plate, the rib of the metal plate for harness terminal arranged on the lower side, and the rib of the metal plate for harness terminal of the same configuration arranged on the upper side face each other. The harness terminal metal plate disposed on the upper side via the solder plate is disposed at a position facing the harness terminal metal plate disposed on the lower side with the outer conductor interposed therebetween. From the side of the metal plate for harness terminal arranged on the upper side, toward the side of the metal plate for harness terminal arranged on the lower side, by heating press with heating means, each of the coaxial cables A step of soldering a part of the exposed external conductors between the metal plates for the harness terminal disposed above and below;
It is a summary to provide.

  According to the present invention, a plurality of convex ribs are formed at both ends in the width direction of the metal plate of the metal plate for harness terminals at the same arrangement interval as the coaxial cable along the longitudinal direction of the metal plate. The outer conductor can be accommodated between the ribs without damaging the central conductor of the coaxial cable as in the case of using a jig provided with a positioning pin. In addition, since the rib functions as a guide groove for the external conductor, manual pitch adjustment is not required, and the work time when the external conductor is set on the harness terminal metal plate can be shortened. In addition, since the outer conductor accommodated between the ribs is restricted from moving in the lateral direction, the coaxial cable does not move left and right by the force of the molten solder flowing during the heat pressing. For this reason, it is not necessary to adjust the pitch in the connecting process with the FPC, the substrate, etc., and an increase in working time can be prevented. Further, since the ribs are formed at both ends in the width direction of the metal plate, the solder plate can be set at an appropriate position simply by placing the solder plate on the upper surface of the metal plate. Also, since the rib restricts the movement of the set solder plate in the width direction, there is no need to adjust the position of the solder plate so that it does not shift when the solder plate is set. Such time can be shortened.

  Furthermore, since the distance from the metal plate on the other side is narrowed by the height h of the rib, the heat when heated by the heating head is easily transferred from the upper metal plate to the lower metal plate, and the heating time is reduced. It can be shortened. In particular, when the height h of the rib is made larger than the outer diameter D / 2 of the outer conductor, the upper and lower ribs are in direct contact, so that more heat is transferred from the upper metal plate to the lower metal plate. It becomes easy to transmit and it becomes possible to further shorten heating time.

  Furthermore, by setting the height h of the rib in the range of 0.5D to 1.5D, the internal insulator is not subjected to excessive pressure during the heating press by the heating head. It is possible to prevent an insulation failure from occurring between the outer conductor and the center conductor.

  In particular, when the height h of the rib is in the range of 0.95D to 1.05D, even if the outer conductor tolerance α varies, the outer conductor may be pressed too much against each metal plate during hot pressing. Or, since there is no shortage of pressing, stable soldering can always be performed.

  Further, when positioning ribs are formed at both ends in the width direction of the metal plate and at the end portions in the longitudinal direction, the movement in the width direction of the opposite-side metal plate is restricted. The upper and lower metal plates are heated and pressed while maintaining a predetermined positional relationship. Therefore, it is possible to prevent the positions of the opposed metal plates and the solder plates set on the inside thereof from being shifted during the hot press.

  Hereinafter, embodiments of a metal plate for a harness terminal and a harness processing method according to the present invention will be described. In addition, each figure referred in description of embodiment shows the structure of the metal plate for harness terminals concerning this embodiment typically, and the dimension of each part, its ratio, etc. differ from an actual thing. In addition, in order to make it easy to grasp the structure of the characteristic part of the invention, there are parts in which the shapes, lengths, thicknesses, etc. in the drawings are not necessarily similar, and there are cases where the dimensions and ratios of enlargement / reduction are different. .

  Moreover, in this embodiment, the same code | symbol as FIG. 6 demonstrated previously is used for the coaxial cable which comprises a harness. That is, the coaxial cable 1 is coated with an inner insulator 5 around a central conductor 4, an outer conductor 6 in which a plurality of conductors are twisted is coated on the outer side, and an outer insulator 7 called a jacket on the outer side. It is covered.

  1A and 1B are external views of a metal plate for a harness terminal (hereinafter referred to as a ribbed metal plate) according to Embodiment 1, wherein FIG. 1A is a plan view of the ribbed metal plate, and FIG. A front view and (c) are side views of a ribbed metal plate. The metal plate 10 with ribs of this embodiment uses a strip-shaped metal plate 11 as a substrate, and convex ribs 12 are the same as the cable 1 along the longitudinal direction of the metal plate 11 at both ends in the width direction of the metal plate 11. A plurality are formed at an arrangement interval (pitch p). The ribs 12 are set such that the distance W in the longitudinal direction of the metal plate 11 is D + α when the outer diameter of the outer conductor 6 of the cable 1 is D and the outer diameter tolerance of the outer conductor 6 is α. Yes. The outer diameter D of the outer conductor 6 means not the outer diameter of each twisted conductor, but the outer diameter in a state where the outer conductor 6 is covered on the outer side. The rib height h from the upper surface of the metal plate 11 is set to be in the range of 0.5D to 1.5D, preferably in the range of 0.95D to 1.05D.

  In the present embodiment, since the ribs 12 are formed at both ends in the width direction of the metal plate 11, as shown in FIG. 1A, a solder plate is formed on the upper surface of the metal plate 11 without interfering with the ribs 12. 13 can be set.

  The metal plate 10 with ribs as described above can be formed, for example, by providing convex portions to be ribs 12 at both ends in the width direction of a flat plate to be the metal plate 11 and bending the convex portions by 90 °. .

  Next, a harness processing method using the ribbed metal plate 10 will be described with reference to FIG. FIGS. 2A to 2E are front views showing a procedure when soldering external conductors together with two ribbed metal plates. Here, FIGS. 2A to 2E correspond to views as seen from an arrow A shown in FIG. The lower ribbed metal plate is denoted as 10A, and the upper ribbed metal plate is denoted as 10B.

  First, as shown in FIG. 2A, the solder plate 13 is set on the upper surface of the metal plate 11 of the lower ribbed metal plate 10A. Next, as shown in FIG. 2B, the partially exposed outer conductor 6 of each cable 1 is accommodated between the ribs 12 of the ribbed metal plate 10A. Here, each external conductor 6 is housed in the ribbed metal plate 10 </ b> A via the solder plate 13. Next, as shown in FIG. 2 (c), the solder plate 13 is set on the upper portion of the outer conductor 6, and further, as shown in FIG. 2 (d), the lower ribbed metal with the outer conductor 6 interposed therebetween. The upper ribbed metal plate 10B is disposed at a position facing the plate 10A. As a result, the solder plates 13 are set up and down so as to sandwich the outer conductor 6 therebetween.

  Next, in the state of FIG. 2D, heating is performed in the direction of the arrow by a heating head (heating means) (not shown) from the upper ribbed metal plate 10B side toward the lower ribbed metal plate 10A side. Press. As a result, as shown in FIG. 2 (e), the gap between the upper ribbed metal plate 10 </ b> B and the lower ribbed metal plate 10 </ b> A is filled with the melted solder 13 a of the solder plate 13. The partially exposed outer conductor 6 is collectively soldered between the ribbed metal plates 10A and 10B.

  According to this embodiment, a plurality of convex ribs 12 are formed at both ends in the width direction of the metal plate 11 of the metal plate 11 with ribs at the same arrangement interval as the cable 1 along the longitudinal direction of the metal plate 11. Therefore, the outer conductor 6 can be accommodated between the ribs 12 without damaging the center conductor 4 of the cable 1 as in the case of using the jig provided with the positioning pins described above. In addition, since the rib 12 functions as a guide groove for the outer conductor 6, manual pitch adjustment is unnecessary, and the working time when the outer conductor 6 is set on the ribbed metal plate 10 can be shortened. Further, since the outer conductor 6 accommodated between the ribs 12 is restricted from moving in the lateral direction, the cable 1 does not move left and right due to the force of the solder 13a melted during the hot pressing. For this reason, it is not necessary to adjust the pitch in the connecting process with the FPC, the substrate, etc., and an increase in working time can be prevented. Further, since the ribs 12 are formed at both ends of the metal plate 11 in the width direction, the solder plate 13 can be set at an appropriate position simply by placing the solder plate 13 on the upper surface of the metal plate 11. Further, since the rib 12 restricts movement of the set solder plate 13 in the width direction, it is necessary to adjust the solder plate 13 so that the position of the solder plate 13 does not shift when the solder plate 13 is set. In addition, the time required for the work can be shortened.

  Further, since the distance between the rib 12 and the metal plate on the other side is narrowed by the height h, the heat when heated by the heating head is changed from the upper ribbed metal plate 10B to the lower ribbed metal plate 10A. It becomes easy to transmit and the heating time can be shortened. In particular, when the height h of the rib 12 is made larger than the outer diameter D / 2 of the outer conductor 6, the upper and lower ribs 12 are in direct contact with each other, so that the lower rib from the upper ribbed metal plate 10B. Heat is more easily transmitted to the attached metal plate 10A, and the heating time can be further shortened.

  Furthermore, by setting the rib height h to be in the range of 0.5D to 1.5D, the internal insulator 5 is not subjected to excessive pressure during the heating press by the heating head. It is possible to prevent an insulation failure from occurring between the outer conductor 6 and the center conductor 4 due to the collapse. In particular, when the height h of the rib is in the range of 0.95D to 1.05D, even if the outer diameter tolerance α of the outer conductor 6 varies, the outer conductor 6 is pressed against each metal plate during heating press. Since it is not too much or insufficiently pressed, stable soldering can always be performed.

  As described above, according to the ribbed metal plate and the harness processing method according to the first embodiment, it is possible to efficiently perform terminal processing without applying a load to the cable.

  Next, Embodiment 2 which is other embodiment of the metal plate with a rib is demonstrated. In the second embodiment, the same parts as those in the first embodiment will be described using the same reference numerals.

  3 is an external view of a metal plate with ribs according to the second embodiment, (a) is a plan view of the metal plate with ribs, (b) is a front view of the metal plate with ribs, and (c) is a metal with ribs. It is a side view of a board. The ribbed metal plate 20 of the present embodiment is formed with four positioning ribs 14 at both ends in the width direction of the metal plate 11 and at the ends in the longitudinal direction of the metal plate 11. This positioning rib 14 is for restricting movement of the ribbed metal plate 10 in the width direction when the ribbed metal plate 10 shown in FIG. 1 and the ribbed metal plate 20 shown in FIG. The rib height is set higher than the other ribs 12. The rib height h of the positioning rib 14 only needs to be high enough to engage with an end portion in the width direction of the ribbed metal plate 10 when the other ribbed metal plate 10 is disposed opposite to the rib height h. . In addition, opposing arrangement | positioning means the state which has arrange | positioned the metal plates 10 and 20 with a rib up and down before a heat press.

  FIG. 4 is an explanatory view when two ribbed metal plates are arranged opposite to each other, (a) is a front view showing a positional relationship when two ribbed metal plates are arranged oppositely, and (b) is two It is a front view when the metal plate with a rib is opposingly arranged and it heat-presses.

  In the present embodiment, the procedure for setting the solder plate 13 and the outer conductor 6 of the cable 1 is the same as that in the first embodiment (see FIG. 2), and thus the description thereof is omitted. In this embodiment, as shown to Fig.4 (a), the point which has arrange | positioned the metal plate 20 with a rib (FIG. 3) on the lower side, and has arrange | positioned the metal plate 10 with a rib (FIG. 1) on the upper side is implemented. Different from Form 1. In the state shown in FIG. 4A, since the positioning rib 14 of the ribbed metal plate 20 and the end in the width direction of the ribbed metal plate 10 are engaged, the width of the ribbed metal plate 10 is increased. Movement will be regulated.

  Then, in the state of FIG. 4A, when pressing is performed in the direction of the arrow by a heating head (not shown) from the upper ribbed metal plate 10 side toward the lower ribbed metal plate 20 side, FIG. As shown in (b), the space between the upper ribbed metal plate 10 and the lower ribbed metal plate 20 is filled with the melted solder 13a of the solder plate 13, and a part of each cable 1 is exposed. The outer conductor 6 is collectively soldered between the ribbed metal plates 10 and 20. Since the engagement between the positioning ribs 14 of the ribbed metal plate 20 and the end portions in the width direction of the ribbed metal plate 10 remains maintained during the heating press, the upper and lower ribbed metal plates 10, 20 are maintained. Is heated and pressed while maintaining a predetermined positional relationship.

  Therefore, according to the present embodiment, it is possible to prevent the positions of the ribbed metal plates 10 and 20 and the solder plate 13 set inside thereof from being shifted during the hot pressing.

  Although the outline of the present invention has been described by using the above-described embodiments, the description and drawings that form a part of this disclosure do not limit the technical scope of the present invention, and various alternative embodiments can be derived from this disclosure. Is recalled.

  For example, in the first embodiment, the example in which the metal plates 10A and 10B with ribs are arranged on the upper and lower sides is shown. However, the metal plate with ribs is arranged only on the lower side and the normal metal plate (see FIG. 6) is opposed to the upper side. An arrangement may be adopted.

  Similarly, in Embodiment 2, the ribbed metal plate 20 may be disposed only on the lower side, and the normal metal plate may be disposed on the upper side. Moreover, in Embodiment 2, as the metal plate 20 with a rib arrange | positioned below, the positioning rib 14 is formed in the both ends of the width direction of the metal plate 11, and the center part of a longitudinal direction, and a normal metal plate is upper side. It is good also as a structure which opposedly arranged.

  Further, in the first and second embodiments, the example using the solder plate is shown, but a solder paste may be used instead of the solder plate.

  As described above, it is needless to say that the present invention includes various embodiments not described herein. Therefore, the technical scope of the present invention is determined only by the invention specifying matters according to the scope of claims reasonable from the above description.

1 is an external view of a ribbed metal plate according to Embodiment 1. FIG. (A) is a top view of a metal plate with a rib. (B) is a front view of a metal plate with a rib. (C) is a side view of a metal plate with ribs. (A)-(e) is a front view which shows the procedure at the time of collectively soldering an external conductor with the metal plate with two ribs in Embodiment 1. FIG. FIG. 6 is an external view of a ribbed metal plate according to the second embodiment. (A) is a top view of a metal plate with a rib. (B) is a front view of a metal plate with a rib. (C) is a side view of a metal plate with ribs. Explanatory drawing when two metal plates with a rib are opposingly arranged in Embodiment 2. FIG. (A) is a front view which shows the positional relationship when two metal plates with a rib are opposingly arranged. (B) is a front view when two ribbed metal plates are arranged opposite to each other and hot-pressed. The perspective view which shows the terminal part of the conventional common flat multi-core coaxial harness. The front view which shows arrangement | positioning at the time of lump soldering an external conductor with a metal plate in a prior art example. (A) is a front view which shows the state before soldering. (B) is a front view showing a state after soldering.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Coaxial cable 2 ... Plastic tape 4 ... Center conductor 5 ... Internal insulator 6 ... External conductor 7 ... External insulator 10 (10A, 10B), 20 ... Metal plate with a rib (metal plate for harness terminals)
DESCRIPTION OF SYMBOLS 11 ... Metal plate 12 ... Rib 13 ... Solder plate 13a ... Solder 14 ... Positioning rib 100 ... Harness

Claims (4)

In the terminal of a flat multi-core coaxial harness in which a plurality of coaxial cables are arranged in parallel at equal intervals, a metal plate for a harness terminal for collectively soldering the external conductor partially exposed of each coaxial cable,
A plurality of convex ribs are formed at the same arrangement interval as the coaxial cable along the longitudinal direction of the metal plate at both ends in the width direction of the metal plate to be a substrate,
The rib interval W in the longitudinal direction of the metal plate is D + α (D: outer diameter of the outer conductor, α: outer diameter tolerance of the outer conductor), and the height h from the upper surface of the metal plate is 0.5D to 1.5D. Configured to be
A harness terminal metal plate characterized in that a partially exposed outer conductor of each coaxial cable is accommodated between ribs in the longitudinal direction of the metal plate.   The metal plate for a harness terminal according to claim 1, wherein a height h of the rib is 0.95D to 1.05D.   The metal plate for a harness terminal when the metal plate for a harness terminal according to claim 1 is disposed at both ends in the width direction of the metal plate and at an end in the longitudinal direction of the metal plate. The metal plate for a harness terminal according to claim 1, further comprising a positioning rib for restricting movement in the width direction. A harness processing method using the harness terminal metal plate according to any one of claims 1 to 3,
A step of setting a solder plate on the upper surface of the metal plate of the harness terminal metal plate disposed on the lower side;
Storing a partly exposed outer conductor of each coaxial cable of the flat multicore coaxial harness between the ribs of the harness terminal metal plate disposed on the lower side;
The harness terminal metal plate arranged on the lower side so that the rib of the harness terminal metal plate arranged on the lower side and the rib of the same metal plate for harness terminal arranged on the upper side face each other. A step of disposing the metal plate for harness terminal disposed on the upper side via a solder plate with the outer conductor interposed therebetween at a position facing the metal plate;
From the side of the harness terminal metal plate arranged on the upper side toward the side of the harness terminal metal plate arranged on the lower side, by heating and pressing by heating means, a part of each coaxial cable is exposed A step of batch soldering the outer conductors arranged between the metal plates for the harness terminal disposed above and below,
A harness processing method comprising:

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