KR101170590B1 - Connection structure and connection method of a coaxial cable harness - Google Patents

Abstract

The present invention provides a connection structure and a connection method for a coaxial cable harness capable of ensuring a stable ground state of a ground bar while keeping the center conductor and the connection terminal of the coaxial cable in a stable conductive connection state. A plurality of coaxial cables 20 are arranged in parallel, at the end of each coaxial cable 20 is electrically conductively connected to the connection terminal 17 in which the center conductor 21 is arranged in parallel, and a plurality of coaxial cables The outer conductor 23 of 20 is electrically connected to the common ground bar 14, and the ground bar 14 is end-contacted at both ends of the main body part 16 extending in the parallel direction of the coaxial cable 20. Protrusions electrically conductively connected to the branch portion 18 and the intermediate ground connection terminal 17a arranged in parallel with the connection terminal 17 extending from the main body portion 16 at locations other than the end ground portion 18 ( 13, the recess 13a is formed in the protrusion 13 at the connection part of the protrusion 13 and the connection terminal 17a for intermediate grounds, and has solder S in the recess 13a.

Description

CONNECTION STRUCTURE AND CONNECTION METHOD OF A COAXIAL CABLE HARNESS}

The present invention relates to a connecting structure and a connecting method of a coaxial cable harness in which a plurality of coaxial cables arranged in parallel is connected to a connecting terminal.

In recent years, in devices such as laptops, cellular phones, and small video cameras, extremely coaxial cables are used for connection between the device body and the liquid crystal display and wiring in the device. For ease of wiring, a harness-shaped coaxial cable harness in which a plurality of coaxial cables are collectively integrated is used (see Patent Document 1, for example).

The coaxial cable used for the coaxial cable harness is constructed by sequentially disposing a central conductor, an internal insulator, an outer conductor, and an outer sheath in a coaxial shape from the inside. Although a plurality of such coaxial cables are integrated to form a coaxial cable harness, the terminal portion of the coaxial cable harness is connected and fixed to a connector terminal or a substrate having a predetermined pitch by conductive connection such as soldering. One example of a conventional coaxial cable harness is shown in FIGS. 9 and 10.

9 shows one end of the coaxial cable harness 1. The coaxial cable harness 1 includes a plurality of coaxial cables 2 and an insulated cable 3 arranged in parallel, and a center conductor 3a of the outer conductor 2a of the plurality of coaxial cables 2 and the insulated cable 3. Is electrically connected to the common ground bars 4 and 5. The ground bar 4, 5 is provided with the edge part ground part 4a in the both ends, and is electrically conductively connected to the to-be-connected part for grounding. The intermediate ground part which consists of a ground pin 6 is provided between the ground bar 4 and the center conductor 3a of the insulated cable 3 in the places other than the edge part ground part 4a of the ground bar 4, The pin 6 is electrically connected to the center conductor 3a and the ground bar 4. Moreover, the ground pin 6 is electrically conductively connected to the connection terminal 8 provided in the to-be-connected member 7, such as a board | substrate and a connector. Thereby, grounding is performed while fixing the position with respect to the to-be-connected member 7 in the both ends (end ground part 4a) of the ground bar 4, and the intermediate ground part (grand pin) of the ground bar 4 is carried out. (6)] is also grounded.

[Patent Document 1] Japanese Patent Application Laid-Open No. 2007-280772

When conducting electrically connecting the center conductor of the coaxial cable and the intermediate ground portion of the ground bar to the connection terminal, it is considered to collectively connect the solder by a pulse heater or the like in order to reduce the number of steps of the connection. However, when the collective solder connection is made, the intermediate ground portion is pushed to the connection terminal, so that the solder S shown in FIG. 10 is surrounded by the connection terminal 8 from the intermediate ground portion (grand pin 6). The solder S of the intermediate ground portion exists only in the side portion and may not be interposed between the connecting terminals 8. In particular, when the thickness of the intermediate ground portion is thicker than the height of the center conductor at the time of collective soldering, the tendency is remarkable. 10 is sectional drawing (C-C sectional drawing of FIG. 9) along the cable axial direction in an intermediate ground part.

If no solder is interposed between the connection terminal and the intermediate grounding portion (connection surface of the intermediate grounding portion), the connection strength of the intermediate grounding portion to the connection terminal is weakened, so that the intermediate grounding portion is peeled off in the initial state, or the vibration occurs after mounting. The intermediate ground part may peel off. In such a case, the grounding performance near the center of the ground bar may become unstable, resulting in insufficient noise removal effect.

It is therefore an object of the present invention to provide a connection structure and a connection method for a coaxial cable harness that can ensure a stable ground state of a ground bar while keeping the center conductor and connection terminal of a coaxial cable in a stable conductive connection state.

In the connection structure of the coaxial cable harness according to the present invention, a plurality of coaxial cables are soldered to the connection terminals and electrically connected. The coaxial cable has a center conductor, an inner insulator disposed on the outer circumference of the center conductor, an outer conductor disposed on the outer circumference of the inner insulator, and an outer shell disposed on the outer circumference of the outer conductor. The plurality of coaxial cables are arranged in parallel. At the end of each of the coaxial cables, the center conductors are electrically conductively connected to connection terminals arranged in parallel. External conductors of the plurality of coaxial cables are electrically connected to a common ground bar. The ground bar has a body portion and a protrusion. The main body portion extends in the parallel direction of the plurality of coaxial cables, and the protruding portion extends from the main body portion at portions other than both ends of the main body portion to protrude. The protruding portion is soldered to the intermediate ground connection terminal and is electrically connected. The intermediate ground connection terminal is arranged in parallel with the connection terminal. In the connection part of the said protrusion part and the said intermediate ground connection terminal, the recessed part is formed in at least one of the said protrusion part and the said intermediate ground connection terminal, and has solder in the said recessed part.

In the connecting structure of the coaxial cable harness according to the present invention, a narrow width portion having a width smaller than that of the terminal connecting portion is formed between the terminal connecting portion conductively connected to the connecting terminal for intermediate ground and the main body portion. It is preferable that it is done.

In the connecting structure of the coaxial cable harness according to the present invention, the ground bar is preferably plated after molding.

In the method of connecting a coaxial cable harness according to the present invention, a plurality of connections in which a plurality of coaxial cables are arranged in parallel, conductively connects the outer conductors of the plurality of coaxial cables to the main body of the ground bar, and the center conductors are provided in parallel It is soldered to a terminal for conductive connection, and the ground bar is soldered to a grounding terminal for conductive connection. The coaxial cable consists of a center conductor, an inner insulator, an outer conductor and an outer sheath as described above. An inlet exposure process is performed to expose the ends of the plurality of coaxial cables in parallel so that the outer conductor, the inner insulator and the center conductor are exposed in stages. The outer conductor of the coaxial cable is electrically connected to the main body of the ground bar. Then, the protruding portions extending from portions other than both ends of the main body portion of the ground bar and each of the above-described center conductors are collectively soldered and electrically connected to the intermediate ground connection terminals and the plurality of connection terminals. In the batch soldering, a recess formed in at least one of the protrusion and the intermediate grounding connection terminal is disposed at a connection portion of the protrusion and the intermediate grounding terminal, and solder is attached to the recess so that the protrusion and the Intermediate ground connection terminals are soldered.

In the connection method of the coaxial cable harness which concerns on this invention, it is preferable that the pressing force with respect to the said intermediate ground connection terminal at the time of the said lump soldering is 1.83 Mpa or more.

According to the present invention, since the concave portion is provided in the projections provided at locations other than the end ground portions at both ends of the ground bar, and at least one of the connection terminals for intermediate grounds connected to the projections, at the time of collective solder connection Even if the protrusion is strongly pressed against the connection terminal for intermediate ground, the molten solder will remain mixed in the recess. Therefore, the solder in this recessed part strongly adhere | attaches a protrusion part and the intermediate | middle grounding connection terminal, and can fully ensure connection strength. Therefore, it is possible to collectively connect solder by relatively strong pressing force, to obtain a stable conductive connection state between the center conductor of the coaxial cable and the connection terminal, and also to secure a stable ground state in the middle portion of the ground bar.

EMBODIMENT OF THE INVENTION Hereinafter, the example of embodiment of the connection structure of a coaxial cable harness which concerns on this invention, and a connection method is demonstrated with reference to drawings.

In addition, the connection structure of the coaxial cable harness according to the present invention can be adopted in various forms, such as a connector attached to both ends of the coaxial cable harness, or a connector attached only to one end side and the other end connected to the substrate. . The configuration and connection method of one end of the coaxial cable harness will be described below.

1 is a plan view showing a connecting structure of a coaxial cable harness according to the present embodiment, FIG. 2 is a cross sectional view of a coaxial cable used in the coaxial cable harness of FIG. 1, and FIG. 3B is a cross-sectional view taken along line BB of FIG. 1.

As shown in FIG. 1, in the coaxial cable harness 10, the coaxial cable 20 of the same kind and same size (for example, 34) is arrange | positioned in parallel, and the coaxial cable harness 10 has several coaxial at the edge part of the axial direction. The connection terminal in which the outer conductor 23 of the cable 20 is electrically conductively connected to the common ground bar 14 and the center conductor 21 and the ground bar 14 of each coaxial cable 20 are arranged in parallel ( 17) and a connection structure electrically conductively connected to the connection terminal 17a for intermediate grounds. In addition, the some connection terminal 17 and the intermediate grounding connection terminal 17a are provided in parallel by the predetermined pitch (for example, 0.3 mm) in the to-be-connected member 11 which is a connector or a board | substrate.

As shown in FIG. 2, the coaxial cable 20 includes a center conductor 21, an inner insulator 22 disposed on the outer circumference thereof, an outer conductor 23 disposed on the outer circumference of the inner insulator 22, and an outer conductor ( It has the insulating sheath 24 arrange | positioned at the outer periphery of 23, and arrange | positions them in coaxial shape and is comprised.

As the coaxial cable 20, for example, a cable corresponding to AWG42 according to an American Wire Gage (AWG) standard or a cable thinner than AWG42 is used. The coaxial cable 20 of AWG42 is formed by twisting seven wires 21a of a silver-plated copper alloy having an outer diameter of, for example, a center conductor 21. The inner insulator 22 is made of a fluorine resin such as PFA that covers the outer circumferential surface of the center conductor 21 and is formed to an outer diameter of 0.17 mm. The outer conductor 23 is formed to have an outer diameter of 0.23 mm by winding a plurality of element wires 23a of, for example, a silver-plated copper alloy having an outer diameter of 0.03 mm into a spiral shape on the outer circumferential surface of the inner insulator 22. In addition, the outer shell 24 is made of, for example, a fluororesin such as PFA covering the outer circumferential surface of the outer conductor 23, and in the case of AWG42, the outer diameter is formed to an outer diameter of 0.31 mm.

As shown in FIG. 1 and FIG. 3, the end of the coaxial cable 20 is inlet-exposed, and the center conductor 21, the inner insulator 22, and the outer conductor 23 are sequentially phased from the front end side, respectively. Are exposed at predetermined lengths. The coaxial cable harness 10 is a state in which all the coaxial cables 20 are arranged in parallel, and the outer conductors 23 aligned are sandwiched by two common ground bars 14 and 15, and are electrically connected by soldering. It is.

In addition, the coaxial cable harness 10 may contain the insulated cable comprised by the center conductor and the outer shell besides the coaxial cable 20.

These ground bars 14 and 15 are formed in a plate shape having a length and a thickness that are in contact with each other or across the outer conductor 23 of all coaxial cables 20 in parallel at predetermined intervals. Electroconductive metal plates, such as a copper plate, are formed by making a hole. The ground bar 15 disposed near the connected member 11 has a thin rectangular shape extending in the parallel direction of the coaxial cable 20, and the ground bar 14 disposed far away from the connected member 11 is formed. The coaxial cable 20 from the main body 16 at locations other than the rectangular main body portion 16 extending in the parallel direction of the coaxial cable 20 and the end ground portions 18 at both ends of the main body portion 16. The protrusion 13 extended in the axial direction of is provided.

The ground bars 14 and 15 are electrically connected to both ends of the coaxial cable 20 in the parallel direction by being soldered to the grounding terminal 17c on the member 11 to be connected. Thereby, the edge ground part 18 common to both ground bars is comprised.

The protruding portion 13 of the ground bar 14 is soldered and electrically connected to one or a plurality of intermediate ground connection terminals 17a to function as an intermediate ground portion of the ground bar 14. This protrusion 13 is integrally molded together with the main body 16 of the ground bar 14 in this embodiment. Although the protrusion part 13 can be formed separately from the main body part 16, and it can connect with the main body part 16, it is preferable that the one integrally molded has less connection process.

In addition, as shown in FIG. 3, in the connection part of the protrusion part 13 and the connection terminal 17a for intermediate grounds, the recessed part 13a is formed in the protrusion part 13, and solder (in the recessed part 13a) Has S) As a result, a layer of solder S is formed between the protruding portion 13 and the intermediate grounding connecting terminal 17a, and the solder S forms the protrusion 13 and the intermediate grounding connecting terminal 17a. It is strongly bonded and sufficient connection strength is ensured.

Moreover, the solder S pushed out from the recessed part 13a also exists in the side surface (plate thickness part) 13b of the projection part 13, whereby the outer peripheral part is connected to the intermediate ground when viewed from the plane of the projection part 13. It is fixed with respect to the terminal 17a, and is electrically conductively connected. The ground bar 14 can be formed by punching a plate-like member such as tin plating or plated copper plate, but in this case, plating is present only on the upper and lower surfaces. Considering that the solder S is also present on the side surface 13b of the protruding portion 13, the side surface 13b is preferably plated in order to improve the solder wettability. Therefore, it is preferable that the ground bar 14 is formed by drilling a plate-like member and then immersing it in a plating solution to perform plating.

In addition, when the to-be-connected member 11 is a connector other than a board | substrate, the shell (not shown) of the metal plate of cross-sectional U shape is soldered on one ground bar 14. Then, both ends of the shell are connected to the ground connection of the connector, whereby the ground bar 14 is grounded. Also in this case, the projections act as intermediate ground portions, and the same applies to stabilization of the ground potential.

Next, the connection method of the said coaxial cable harness 10 is demonstrated. First, all the plurality of coaxial cables 20 and the insulated cables 12 constituting the coaxial cable harness 10 are arranged in parallel and held by a jig or a tape or the like (not shown), and the plurality of coaxial cables 20 The end is subjected to the inlet exposure process (inlet exposure process). In this entrance exposure treatment, a laser processing machine such as a YAG laser or a CO ₂ laser is used. First, the outer shell 24 is cut by irradiating the outer shell 24 of the plurality of coaxial cables 20 by adjusting the wavelength and the intensity of the CO ₂ laser. The end side portion of the cut sheath 24 is drawn out of the coaxial cable 20 and removed. In this way, the outer conductor 23 is exposed. Next, the exposed outer conductor 23 is irradiated with a YAG laser by adjusting its wavelength and intensity to cut the outer conductor 23. The end side portion of the cut outer conductor 23 is drawn out of the coaxial cable 20 and removed. In this way, the internal insulator 22 is exposed. Thereafter, the exposed internal insulator 22 is irradiated with a CO ₂ laser by adjusting the wavelength and intensity to cut the internal insulator 22. The end side portion of the cut inner insulator 22 is drawn out of the coaxial cable and removed. In this way, the center conductor 21 is exposed.

When the inlet exposure step is executed, the outer conductors 23 of all the coaxial cables 20 are sandwiched between the ground bars 14 and 15 for holding. At that time, the coaxial cable 20 is not disposed on the protrusion 13 of the ground bar 14, and when the protrusion 13 and the center conductor 21 of the coaxial cable 20 are viewed from above as shown in FIG. To be placed. The height of the protrusion part 13 and the center conductor 21 may be shifted. Here, the ground bars 14 and 15 are provided with the solder layer which apply | coats a solder to one surface, respectively, and when the external conductor 23 is clamped, the solder layer side is turned inside. In that state, heating is performed via the ground bars 14 and 15. As a result, the solder layers of the ground bars 14 and 15 melt, and the outer conductors 23 of all the coaxial cables 20 are electrically connected to the ground bars 14 and 15.

In this way, the coaxial cable harness 10 with which the end part was integrated is connected to the to-be-connected member 11, such as a board | substrate, such as a connector terminal and an FPC.

When connecting to the to-be-connected member 11 which is a board | substrate, first, the edge part ground part 18 located in the both ends of the ground bars 14 and 15 is electrically connected to the grounding terminal 17c.

Then, the collective soldering of the center conductor 21 to the connecting terminal 17 and the protrusion 13 to the connecting terminal 17a for intermediate grounding is performed. First, as shown in FIG. 4, the connection part of the center conductor 21 and the connection terminal 17 of the coaxial cable 20, the protrusion part 13 of the ground bar 14, and the connection terminal 17a for intermediate grounds are shown. The plate solder S1 having a linear shape (for example, a round rod shape having a diameter of 0.08 mm) is sandwiched and arranged at the connecting portion of the cross section. In that case, the recessed part 13a of the protrusion part 13 is arrange | positioned so that it may face to the to-be-connected member 11 and the intermediate ground connection terminal 17a. And the heat chip 9 of a pulse heater is pushed in from the center conductor 21 and the protrusion part 13, and it heats, pressing toward the connection terminal 17 and the intermediate terminal connection terminal 17a. As a result, heat is transmitted to the plate solder S1 via the center conductor 21 and the protrusion 13, and the plate solder S1 is melted and collected at the center conductor 21 and the protrusion 13 in the vicinity. At that time, the plate solder S1 located between the protrusion 13 and the intermediate ground connection terminal 17a is fitted into the recess 13a of the protrusion 13. After that, as shown in Fig. 3, the solder conductors (S) are respectively used for the center conductor (21) with respect to the connection terminal (17), and the protrusions (13) with respect to the connection terminal (17a) for intermediate grounding. It is firmly fixed and electrically connected. As shown in FIG. 4, the projection part 13 is connected to two intermediate ground connection terminals 17a. The protrusion 13 may be connected to three or more intermediate grounding connection terminals 17a.

The position of the protrusion 13 can be any position within the parallel coaxial cable 20. However, for the purpose of intermediate grounding, it is preferable to provide in the center portion of the parallel coaxial cable 20. The intermediate ground connection terminal 17a can be the same as the connection terminal 17 to which the coaxial cable 20 is connected, and their parallel pitch may be constant.

In addition, at the time of this collective soldering, the middle part deform | transforms so that the front end may contact the intermediate | middle ground connection terminal 17a by the heat and the pressing force by the heat chip 9 by the heat chip 9. After the batch soldering, this deformed shape is maintained.

If the pressing force for pushing the heat chip 9 of the pulse heater against the connection terminal 17 is too weak at the time of collective soldering, the plate solder S1 is not sufficiently melted and the center conductor 21 is not electrically connected. If not, the connection strength will be insufficient even if the connection is made. Therefore, from the viewpoint of the connection strength of the center conductor 21, the pressing force for pushing the heat chip 9 is preferably larger. For example, at a pressing force of 0.23 MPa, the center conductor 21 is not adhered at all, and at a pressing pressure of 1.38 MPa, the molten residue of the plate solder S1 remains everywhere, and at a pressing force of 1.83 MPa. It became a favorable soldering state (connection state).

Here, FIG. 5 shows the results of the investigation of the relationship between the pressing force of the heat chip 9 and the connection strength of the projecting portion in the conventional connection structure having no concave portion in the connecting portion. When the pressing force is increased, the connection strength of the protrusion is lowered, and the solder layer is not formed between the protrusion and the connecting terminal at a pressure of 1.83 MPa or more for securing the connection strength of the central conductor 21. Therefore, connection strength was 100 gf or less. Connection strength is measured as follows. The protrusion is soldered to the connector's intermediate ground terminal, the connector is fixed, and the ground bar is pulled up 90 ° at a speed of 25 m / min. The force at the time of projecting part peeling from a terminal is made into connection strength.

However, in this embodiment, since the recessed part 13a is provided in the connection part of the protrusion part 13 and the connection terminal 17a for intermediate | middle grounds, even if a pressing force is strengthened to 1.83 Mpa or more, a solder layer in the recessed part 13a. This is reliably formed, and the connection strength between the protrusion 13 and the intermediate ground connection terminal 17a is maintained well. For example, even if the pressing force is 4.59 MPa, the connection strength is 80 to 150 gf, and the connection strength can be approximately five times higher than the average value when there is no recess. Accordingly, the solder is collectively connected by a strong pressing force of 1.83 MPa or more to obtain a stable conductive connection state between the center conductor 21 and the connection terminal 17 of the coaxial cable 20, and at the same time, the protrusion 13 of the ground bar 14. A stable ground state can also be ensured.

In addition, in the conventional connection structure, when the thickness of the protrusion is larger than the diameter of the center conductor, the gap in which the solder remains between the protrusion and the connection terminal when pushed by the heat chip is eliminated, so that the connection strength is significantly reduced. do. In fact, in consideration of the fact that the center conductor 21 is pressed in the radial direction and the stranded wire structure is somewhat collapsed at the time of collective soldering, the height in the case where the element wires 21a of the center conductor 21 overlap two vertically (in AWG42) If the thickness of the protrusion part 13 is equal or more with respect to element wire diameter 0.025mm * 2, connection strength will fall remarkably.

On the other hand, in this embodiment, even if the thickness of the protrusion part 13 is larger than the diameter of two element wires of the center conductor 21, sufficient connection strength can be ensured by providing the recessed part 13a in the connection part. have. For example, when the coaxial cable 20 is AWG42 and the diameter of the center conductor 21 is 0.075 mm, even if the thickness of the protrusion 13 is 0.080 mm, connection strength (100gf or more in average value) can be ensured without a problem. have. For example, when the coaxial cable 20 is AWG46 and the diameter of the center conductor 21 is 0.048 mm, even if the thickness of the protrusion 13 is 0.050 mm, connection strength (100gf or more in average value) can be ensured without a problem. have.

In addition, as thickness (depth) of the recessed part 13a, ie, the thickness of a solder layer, connection strength can be ensured as it is at least 5 micrometers, about 10-20 micrometers normally. For example, the thickness of the recessed part 13a is 25 micrometers as an example when the thickness of the protrusion part 13 is 50 micrometers. In addition, it is preferable that the thickness of the recessed part 13a is 2/3 or less with respect to the thickness of the protrusion 13 from a viewpoint of the intensity | strength of a protrusion 13, and moldability.

In addition, as shown in FIG. 6, the shape of a recessed part can employ | adopt various things. FIG. 6A is the same as the form shown in FIG. 3, and is an example in which the recessed part 13a of about 1/2 length is formed with respect to the connection length L1 of the protrusion part 13. As shown in FIG. 6B is an example in which two recesses 13a are formed in the longitudinal direction of the protruding portion 13. 6C is a form in which the recessed part 17b is provided in the intermediate ground connection terminal 17a of a connection part, without providing a recessed part in the protrusion part 13. As shown in FIG. Concave portions may be provided on both sides (the protruding portion 13 and the intermediate ground connecting terminal 17a) of the connecting portion.

When providing the recessed part in the projection part 13, it is preferable that the recessed part occupies an area of about 3/10 to about 7/10 of the area which the projection part 13 contacts the intermediate ground connection terminal 17a. It is preferable to reduce the area of one recessed portion in terms of the strength of the protrusion 13. On the other hand, the larger the area of the concave portion, the larger the area where the solder layer is formed, so that the protrusion 13 and the intermediate ground connection terminal 17a are firmly connected. Therefore, it is preferable to provide two or more recesses by making the area of one recess small. The cross section of the concave portion may not be the rectangle shown in FIG. 6, or may be, for example, a shape (width divided into two or a triangular shape) that becomes narrower as the upper portion thereof. As shown in FIG. 3 and FIG. 4, although the recessed part may be provided in the middle of the width direction of the protrusion part 13, in order to make shaping | molding of a recessed part easy, it is good to dig a groove from the end to the width direction. For example, one groove having a width of 0.07 mm can be provided in the width direction of the protrusion 13. It is more preferable to provide two concave portions having a width of 0.04 mm in the width direction of the protruding portion 13 from the point of reducing the area of one concave portion.

In addition, the shape of the protrusion part of a ground bar may be a thing with the width changed as shown in FIG.

The projection 13A shown in FIG. 7 is a narrow width portion having a width smaller than that of the terminal connection portion 13d between the terminal connection portion 13d and the body portion 16 electrically conductively connected to the intermediate ground connection terminal 17a. (13c) is formed. The narrow width portion 13c is a portion that is bent and deformed so as to be close to the intermediate ground connection terminal 17a at the time of the batch soldering, and the width of the deformed portion is reduced, resulting in the protrusion 13A after the batch soldering. Residual stress can be reduced. When the residual stress is large, a force that tries to return in the direction in which the protrusion 13A peels from the connection terminal 17a for intermediate ground acts, and may peel off from the connection terminal 17a for intermediate ground. Therefore, by adopting the form shown in Fig. 7, the projection 13A is separated from the intermediate ground connection terminal 17a in the initial state after collective soldering, or the projection 13A is grounded due to vibration after mounting or the like. Peeling from the connecting terminal 17a can be prevented.

Moreover, from the point of the handling of a ground bar, and the prevention of peeling of a protrusion, the width of the narrow width part 13c is more than the plate | board thickness of 13 A of protrusions, and is 5/6 or less with respect to the width of the terminal connection part 13d. It is preferable.

Moreover, the shape of the protrusion part of a ground bar may be the width connected only to one intermediate | middle ground connection terminal, as shown in FIG.

The protruding portion 13B shown in Fig. 8A extends in a single width and is connected to only one intermediate ground connection terminal 17a. The projection 13C shown in FIG. 8B has a narrow width portion 13c and a terminal connection portion 13d that is wider than the narrow width portion 13c has one intermediate ground connection terminal 17a. ) Is only connected. When the parallel pitch of the connecting terminal 17 and the intermediate grounding connection terminal 17a is 1 mm, the width of the intermediate grounding connection terminal 17a is about 0.5 mm. The width of the portion 13c may be about 0.15 mm, and the width of the terminal connecting portion 13d may be about 0.25 mm.

In addition, also in the form shown in FIG.7 and FIG.8, the recessed part is provided in the connection part of the protrusion part and the intermediate ground connection terminal, and the recessed part is provided in at least one of the protrusion part and the intermediate ground connection terminal, and the connection strength of the protrusion part is fully ensured. .

1 is a plan view showing an example of an embodiment of a connection structure of a coaxial cable harness of the present invention;

2 is a cross-sectional view of the coaxial cable used in the coaxial cable harness of FIG.

3 is a cross-sectional view of FIG. 1 showing a coaxial cable harness;

4 is a cross-sectional view showing an example of an embodiment of a method of connecting a coaxial cable harness of the present invention;

5 is a graph showing the relationship between the pressing force and the connection strength in the conventional bonded structure;

6 is a schematic diagram showing an example of the shape of a recess;

7 is a plan view showing a protrusion having a narrow width portion;

8 is a plan view showing a protrusion connected to one connection terminal;

9 is a plan view showing a connection structure of a conventional coaxial cable harness;

FIG. 10 is a cross-sectional view illustrating a connection structure of the coaxial cable harness of FIG. 9. FIG.

<Description of the symbols for the main parts of the drawings>

10 coaxial cable harness 11 connected member

13, 13A, 13B, 13C: protrusion 13A: recess

13b: side 13c: narrow width portion

13d: terminal connection part 14, 15: ground bar

16 main body 17 connection terminal

17a: intermediate ground connection terminal 17b: recessed portion

18: end ground portion 20: coaxial cable

21: center conductor 22: internal insulator

23: outer conductor 24: sheath

S: Solder S1: Plate Solder

Claims (6)

delete delete delete A plurality of coaxial cables having a center conductor, an inner insulator disposed on the outer circumference of the center conductor, an outer conductor disposed on the outer circumference of the inner insulator, and an outer shell disposed on the outer circumference of the outer conductor, are arranged in parallel, Inlet exposure treatment of the end of the coaxial cable to expose the outer conductor, the inner insulator, and the center conductor in stages, Conductive connection of the outer conductor of the coaxial cable to the main body of the ground bar, The center conductor is electrically conductively connected by soldering to a plurality of connection terminals provided in parallel, and the ground bar is electrically conductively connected by soldering to a terminal for grounding using plate solder, Intermediate ground connection terminals provided in parallel with the protrusions and the center conductors by pushing the heat chips from the protrusions extending from portions other than both ends of the main body portion of the ground bar and the respective center conductors. Pressurized to the connecting terminal, When performing the collective soldering, a recess formed in at least one of the protrusion and the intermediate grounding connection terminal is disposed at a connection portion of the protrusion and the intermediate grounding terminal, and solder is mixed in the recess, so that solder is mixed with the protrusion. In the connection method of the coaxial cable harness in which the said intermediate ground connection terminal is soldered, The height direction thickness of the said protrusion is larger than the diameter of the 2 wire | wire of the said center conductor, The pressing force with respect to the intermediate ground connection terminal during the batch soldering is 1.83 MPa or more. How to connect coaxial cable harnesses. delete The method of claim 4, wherein The pressing force is characterized in that less than 4.59 MPa How to connect coaxial cable harnesses.

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