JP4771834B2 - Cable electrical connector and cable connection method - Google Patents

Description

  The present invention relates to a cable electrical connector and a cable connection method in which cable conductors are electrically connected to contacts collectively by a solder material.

  In general, in a cable electrical connector widely used in various electrical devices, a plurality of contacts (conductive terminals) are arranged in parallel in an elongated insulating housing, and each of the plurality of contacts is arranged in parallel. On the other hand, the cable conductor exposed by peeling off the covering material of the cable terminal portion is electrically connected via a thread-like or rod-like solder material.

  With regard to solder connection of such cable conductors, for example, in the proposal according to Patent Document 1 below, the same height is provided on the upper surface side of contacts (conductive terminals) accommodated and held in a plurality of receiving grooves formed in the insulating housing. The cable conductors are placed so that they are aligned at the same position, and by pressing the pulse heater from above on the cable conductors aligned at the same height, all the cable conductors are By simultaneous heating, solder connection of a plurality of cable conductors is performed collectively.

  In actual solder connection work, a solder material is placed on a contact (conductive terminal), a cable conductor is placed on the solder material, and then the heater head is brought into contact with the cable conductor. There is a case where the heater head is brought into contact with the solder material after the solder material is placed on the cable conductor arranged above. However, in any of these solder connection operations, a work space for pressing the heater head is provided in the electric connector. It is necessary to secure it.

  On the other hand, in recent years, there has been a demand for further miniaturization of handy-type electric devices such as mobile phones, and the miniaturization of electrical connectors has been rapidly promoted accordingly. As a result, it has become difficult to secure a working space for the heater head used in the solder connection operation described above.

  As a solder connection means that does not use a heater head, a reflow method (infrared reflow, hot air reflow), a hot air method, a laser method, and the like are conventionally known. Since the cable conductor and the solder material are not sufficiently retained with respect to the conductive terminal), a method of cutting the groove in the contact (conductive terminal) can be considered as the positioning of the solder material. In reality, it is impossible to immediately adopt the solder connection means that does not use the heater head as described above due to reasons such as rising.

JP 2000-77123 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide an electrical connector for a cable and a cable connection method that can satisfactorily perform solder connection of a cable conductor even by solder connection means that does not use a heater head.

In order to achieve the above object, in the electrical connector for a cable according to the present invention, a solder material arranged such that each of a plurality of contacts and cable conductors arranged in parallel extends along the parallel direction is provided. In the electrical connector for a cable that is electrically connected to each other via a pair, each contact has a pair of one end that holds both the cable conductor and the solder material by projecting one end portion of the contact into a bifurcated shape. provided clamping piece consisting of the protruding member of, those holding pieces consisting pair of projecting members, the cable conductors are arranged by shifting the positions from each other in both the parallel direction and the direction extending the contact there are, clamping piece consisting of the pair of projecting members, parallel sides of the contact so as to form a conductor holding groove for accommodating the cable conductor Provided adjacent to, and clamping piece comprising a pair of protruding members forming the conductor holding groove, the solder material by being staggered positions to each other in the extending direction of the cable conductor A solder holding groove is formed , the conductor holding groove is formed between the pair of holding pieces when the holding piece made of the pair of projecting members is viewed in the extending direction of the cable conductor, and the contact When the holding pieces made of the pair of protruding members are viewed in the parallel direction, the solder holding grooves are formed between the pair of holding pieces .

In the cable connection method according to the present invention, the solder material is arranged so as to extend along the parallel direction of the plurality of contacts and the cable conductors arranged in parallel in the electrical connector, and the solder material is interposed therebetween. In the cable connection method in which the cable conductors are electrically connected to the contacts collectively, the conductor holding groove and the solder holding formed by the pair of holding pieces provided in the contact of the cable electrical connector according to the present invention described above. The cable conductor and the solder material are accommodated in the grooves, respectively, so that the solder material is melted in a state where the cable conductor and the solder material are held.

  According to the cable electrical connector or the cable connection method of the present invention having such a configuration, both the cable conductor and the solder material are accommodated in the holding groove formed by the holding piece provided as a part of the contact. Therefore, it is possible to use a solder connection means such as a reflow method or a hot air method that does not use a heater head, which eliminates the need for a space for using the heater head and greatly increases the electrical connector. Miniaturization can be realized.

  Furthermore, since the cable conductor and the solder material are smoothly guided along the edge of the holding groove provided in the contact, the solder connection work is easily and accurately performed, and the edge of the holding groove provided in the contact Is arranged so as to surround the cable conductor and the solder material, the contact area of both members with respect to the contact is increased, and a good electrical connection state can be obtained.

  As described above, the cable electrical connector or the cable connection method according to the present invention includes both the cable conductor and the solder material by the clamping pieces provided as part of the contacts in each of the plurality of contacts arranged in parallel. It is possible to use solder connection means such as reflow method and hot air method that do not use a heater head by forming a holding groove that can store the cable and stably holding both the cable conductor and the solder material The space for using the heater head is not required, and the electrical connector can be greatly reduced in size, and the solder connection work between the contact and the cable conductor is facilitated, and a good electrical connection state can be obtained. Thus, a small, inexpensive and highly reliable electrical connector can be obtained.

  Hereinafter, an embodiment in which the present invention is applied to a plug connector to which a coaxial cable is connected will be described in detail with reference to the drawings.

  First, in the first embodiment of the present invention shown in FIGS. 1 and 2, a coaxial cable 10 is connected to a receptacle connector 1 as a board-side connector mounted on a circuit board (not shown). The plug connector 2 as a wiring material side connector is configured to be matable with each other, and the state immediately before the mating of both the connectors 1 and 2 is shown in FIG. The state at the time is shown in FIG.

  Among them, the receptacle connector 1 has an insulating receptacle housing 11 formed so as to be elongated in the longitudinal width direction (perpendicular to the paper surface). The receptacle housing 11 is provided with a slit-like plug insertion port 11a on the front end side (left side of the drawing) in the fitting direction (left and right direction on the drawing), and a large number of receptacle housings 11 are provided inside the receptacle housing 11. Receptacle contacts 12 having the same shape are housed in parallel at substantially the same interval along the longitudinal width direction.

  Each of the receptacle contacts 12 is provided with a U-shaped connecting portion provided on the front end side (left end side of the paper) with a connecting bending piece 12a and a support portion 12b that are opposed to each other so as to be deflected in the vertical direction. In addition, a leg 12c projecting rearward is provided on the rear end side (right end side of the drawing), and the receptacle contact 12 as a whole is located on the rear side (right side of the drawing) with respect to the receptacle housing 11 described above. From the front side) to the front side (left side of the paper).

  A metal shield shell 13 is attached to the outside of the receptacle housing 11. Further, hooks (not shown) for locking the plug connector 2 fitted as shown in FIG. 2 are arranged at both ends in the longitudinal width direction of the receptacle housing 11.

  Further, the plug connector 2 has a plug housing 21 that can be inserted and fitted inside the receptacle housing 11, and two types of plug contacts 22 and 23 attached to the plug housing 21. For example, a plurality of coaxial cables 10 arranged in parallel in multiple poles as shown in FIG. 3 are collectively soldered. More specifically, the external conductor 10b exposed by peeling the covering member 10a at the end portion of each coaxial cable 10 is electrically connected to the plug contact 22 via a solder material. In addition, a center conductor (core wire) 10c exposed by further peeling the outer conductor 10b of the coaxial cable 10 is electrically connected to the plug contact 23 via a solder material. Yes.

  The connection structure and connection method between the plug contacts 22 and 23 and the outer conductor 10b and the center conductor (core wire) 10c of the coaxial cable 10 are the main part of the present invention. First, the center conductor (core wire) is described above. The embodiment of the connection part between the contact 10c and the plug contact 23 will be described.

  That is, as shown in FIG. 4, the pair of sandwiching pieces 23a and 23a is divided into two forks at the rear end portion (the left end portion in the figure) of the plug contact 23 shown in FIG. The conductor holding groove G1 and the solder holding groove for holding the central conductor (core wire) 10c and the thread-like solder material H1 of the coaxial cable 10 are respectively formed between the pair of sandwiching pieces 23a and 23a. G2 is formed.

  More specifically, the pair of sandwiching pieces 23a, 23a described above are first provided adjacent to each other at an appropriate interval in the longitudinal width direction (left-right direction in the figure) as shown in FIG. The pair of sandwiching pieces 23a, 23a are divided into two forks so as to form a substantially U shape when viewed along the fitting direction (cable extending direction) and project upward. A conductor holding groove G1 is formed between the sandwiching pieces 23a and 23a. A center conductor (core wire) 10c of the coaxial cable 10 is inserted into the conductor holding groove G1 so as to be guided along the inclined edge of the conductor holding groove G1, and is stably held at the bottom of the groove. It has come to be.

  Further, as shown in FIG. 4 (b), the pair of sandwiching pieces 23a and 23a are bent in a substantially V shape in different directions so as to form an appropriate interval in the fitting direction (the left-right direction in the figure). The solder holding grooves G2 are formed by the positional displacement of the holding pieces 23a and 23a when viewed in the longitudinal width direction (vertical direction in the figure). In this solder holding groove G2, a thread-like solder material H1 is mounted so as to be guided along the inclined edge portion of the solder holding groove G2, and is placed above the central conductor (core wire) 10c. Thus, the thread solder material H1 is stably held.

  On the other hand, the above-described plug contact 22 is also provided with a pair of sandwiching pieces 22a and 22a having the same configuration, and the pair of sandwiching pieces 22a and 22a extends along the fitting direction (cable extending direction). In the conductor holding groove formed by being divided into two forks so as to form a substantially U shape when viewed, the coaxial is arranged to be guided along the inclined edge of the conductor holding groove. The outer conductor 10b of the cable 10 is inserted and is stably held at the bottom of the groove.

  Further, the pair of sandwiching pieces 22a and 22a are displaced from each other so as to form a substantially V shape when viewed along the longitudinal width direction (vertical direction in FIG. 1). In this solder holding groove, a thread-like solder material is mounted from above the outer conductor 10b so as to be stably held.

  In connecting the coaxial cable 10 to the plug housing 21 having such a configuration, first, the outer conductor 10b and the center conductor of the coaxial cable 10 are placed in the conductor holding grooves G1 of the plug contacts 22 and 23, respectively. The coaxial cables 10 are arranged in parallel so that the (core wires) 10c are respectively placed thereon. Next, a thread-like solder material H1 is inserted into each solder holding groove G2 of each of the plug contacts 22 and 23 along the longitudinal width direction orthogonal to the parallel direction of the coaxial cable 10, and the thread-like solder material H1 is inserted into the solder contact groove G2. It is placed on the outer conductor 10b and the center conductor 10c. Then, in this state, the thread solder material is melted by a reflow method (infrared reflow, hot air reflow), a hot air method, or a laser method to perform solder connection.

  After the coaxial cable 10 is soldered as described above, the cable retainer 24 is mounted on the upper side of the plug housing 21 and further locked with the plug housing 21 by a hook (not shown).

  As described above, according to the cable electrical connector or the cable connection method according to the present embodiment, the conductor holding groove G1 and the solder holding groove G2 are formed by the holding pieces 22a and 23a provided as a part of the plug contacts 22 and 23. Then, both the cable conductors 10b and 10c and the thread-like solder material H1 are accommodated and stably held in the conductor holding groove G1 and the solder holding groove G2. As a result, it is possible to use solder connection means such as a reflow method, a hot air method, or a laser method that does not use a heater head, which eliminates the need for a space for using the heater head and greatly increases the electrical connector. It is possible to achieve a small size.

  In addition, the smooth guide action for the cable conductors 10b and 10c and the thread-like solder material H1 along the edges of the holding grooves G1 and G2 of the plug contacts 22 and 23 makes the solder connection work easy and accurate, Since the edge portions of the holding grooves G1, G2 of the plug contacts 22, 23 are arranged so as to surround the cable conductors 10b, 10c and the thread-like solder material H1, the contact area with respect to the plug contacts 22, 23 is increased. Therefore, a good electrical connection state can be obtained.

  Next, in the second embodiment shown in FIGS. 5 and 6, the present invention is applied to the plug connector 4 to which the insulated cable 20 is connected. FIG. The state immediately before fitting is shown, and FIG. 6 shows the state where the fitting is completed. Since the basic configuration of the present embodiment is the same as that of the first embodiment described above, only the differences will be described below.

  As described above, the cable used in the present embodiment is a normal insulated cable 20 as shown in FIG. 7, for example, and includes an outer conductor 10b such as the coaxial cable 10 according to the first embodiment. For this reason, only one type of plug contact 42 is disposed in the plug housing 41, and no shield shell is mounted outside the receptacle housing 31.

  Each of the plurality of insulated cables 20 arranged in parallel is connected to the plug contact 42 attached to the plug housing 41 in a lump. The core wires (cable conductors) 20b exposed by peeling off the covering member 20a at the end portions of the terminals 20 are electrically connected to the plug contacts 42 via solder materials, respectively.

  In the rear end portion (left end portion in the figure) of each plug contact 42 described above, a pair of sandwiching pieces 42a and 42a as shown in FIG. The conductor holding groove G3 and the solder holding groove G4 for holding the cable core wire 20b and the thread-like solder material H2 are formed between the pair of sandwiching pieces 42a and 42a.

  That is, the pair of sandwiching pieces 42a and 42a described above are provided in a state of being adjacent to each other at an appropriate interval in the longitudinal width direction (left and right direction in FIG. 8), as shown in FIG. The pair of sandwiching pieces 42a and 42a is divided into two forks so as to form a substantially inverted trapezoid when viewed along the fitting direction (cable extending direction), thereby the sandwiching pieces 42a and 42a. A conductor holding groove G3 is formed between the two. In the conductor holding groove G3, the core wire 20b of the insulated cable 20 is inserted so as to be guided along the inclined edge of the conductor holding groove G3, and is stably held at the groove bottom. It has become.

  Further, as shown in FIG. 8 (b), the pair of sandwiching pieces 42a and 42a are bent in a substantially U shape in different directions so as to form an appropriate interval in the fitting direction (left and right direction in the figure). The sandwiching pieces 42a and 42a are displaced from each other when viewed in the longitudinal width direction (vertical direction in the figure), so that the solder holding groove G4 is formed. In this solder holding groove G4, a thread-like solder material H2 is mounted so as to be guided along the inclined edge of the solder holding groove G4, and is placed above the core wire 20b of the insulated cable 20. Thus, the thread solder material H2 is stably held.

  When connecting the cable to the plug housing 41 having such a configuration, first, in parallel, the core wire 20b of the insulated cable 20 is placed in the inverted trapezoidal holding groove G3 of each plug contact 42. Deploy. Next, the thread solder material H2 is placed on the core wire 20b in the longitudinal width direction orthogonal to the parallel direction of the insulated cables 20. Then, in this state, the thread solder material is melted by a reflow method (infrared reflow, hot air reflow), a hot air method, or a laser method to perform solder connection.

  As described above, according to the cable electrical connector or the cable connecting method according to the present embodiment, the insulated cable 20 is provided in the holding grooves G3 and G4 formed by the holding pieces 42a provided as a part of the plug contact 42. Both the core wire 20b and the thread-like solder material H2 are accommodated and stably held. As a result, it becomes possible to use a solder connection means such as a reflow method, a hot air method, or a laser method that does not use a heater head. The connector can be greatly reduced in size.

  Further, the solder connection work is easily and accurately performed by the guide action with respect to the core wire (cable conductor) 20b and the thread-like solder material H2 along the edges of the holding grooves G3 and G4 of the plug contact 42, and the plug contact 42 Since the edge portions of the holding grooves G3 and G4 are disposed so as to surround the core wire 20b and the thread-like solder material H2, the contact area between the two members is increased and a good electrical connection state is obtained. It has come to be obtained.

  Furthermore, in 3rd Embodiment concerning FIG. 9, a pair of clamping piece 42a, 42a in 2nd Embodiment mentioned above like Fig.9 (a) is along a fitting direction (cable extending direction). As shown in FIG. 9B, the conductor holding groove G5 is formed by being divided into a bifurcated shape so as to form a substantially inverted trapezoidal shape as in the second embodiment. However, as shown in FIG. When viewed along the vertical direction of the figure, one clamping piece 42a is bent so as to be substantially U-shaped, and the other clamping piece 42a is formed so as to stand upright without being bent. As a result, a solder holding groove G6 is formed. In the third embodiment as described above, the same operations and effects as those of the above-described embodiments can be obtained.

  Although the invention made by the present inventor has been specifically described based on the embodiments, the present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the scope of the invention. Needless to say.

  For example, in the above-described embodiment, one cable holding groove is formed for one contact, but a plurality of cable holding grooves can be formed for one contact.

  In the above-described embodiment, thread-like solder is used as the solder material, but other solder materials such as a rod-like solder material can naturally be used.

  Furthermore, although the above-described embodiment is an application of the present invention to a plug connector, the present invention is not limited thereto and can be similarly applied to other electrical connectors such as a receptacle connector. Is.

Furthermore, according to the present invention, in one electrical connector, a plurality of coaxial cables and insulating cables are mixed by the solder holding grooves of the central conductor of the coaxial cable and the core wire of the insulating cable being continuous in the longitudinal width direction. The same type of electrical connector can be applied.

  The present invention can be widely applied to a wide variety of electrical connectors used in various electrical devices.

It is a longitudinal section explanatory view showing the state just before fitting of the electrical connector for coaxial cables (plug connector) in a 1st embodiment of the present invention. It is longitudinal cross-sectional explanatory drawing showing the state immediately after fitting of the electrical connector for coaxial cables in 1st Embodiment of this invention represented by FIG. FIG. 3 is an external perspective explanatory view showing a structure of a terminal portion of a coaxial cable connected to an electrical connector for a coaxial cable in the first embodiment of the present invention shown in FIGS. 1 and 2. 1 and 2 show a terminal structure of a plug contact used in the coaxial cable electrical connector according to the first embodiment of the present invention shown in FIG. 1 and FIG. (B) is side surface expansion explanatory drawing. It is a longitudinal cross-sectional explanatory drawing showing the state just before fitting of the electrical connector (plug connector) for insulated cables in 2nd Embodiment of this invention. It is a longitudinal cross-sectional explanatory drawing showing the state immediately after fitting of the electric connector for insulated cables in 2nd Embodiment of this invention represented by FIG. FIG. 7 is an external perspective view illustrating the structure of a terminal portion of an insulated cable connected to the insulated cable electrical connector in the second embodiment of the present invention shown in FIGS. 5 and 6. 5 and 6 show a terminal structure of a plug contact used in an insulated cable electrical connector according to the second embodiment of the present invention shown in FIG. 5 and FIG. (B) is side surface expansion explanatory drawing. The terminal structure of the plug contact used for the electrical connector for cables in 3rd Embodiment of this invention is represented, Comprising: (a) is front expansion explanatory drawing, (b) is side expansion explanatory drawing. .

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Receptacle connector 2 Plug connector 10 Coaxial cable 10a Coating | coated member 10b External conductor (cable conductor)
10c Center conductor (core wire; cable conductor)
DESCRIPTION OF SYMBOLS 11 Receptacle housing 11a Plug insertion slot 12 Receptacle contact 12a Connection bending piece 12b Support part 12c Leg part 13 Shield shell H1 Threaded solder material G1 Conductor holding groove G2 Solder holding groove 3 Receptacle connector 4 Plug connector 20 Insulation cable 20a Covering Member 20b Core wire (cable conductor)
21 Plug housing 22, 23 Plug contact 22a, 23a Clamping piece 24 Cable retainer 31 Receptacle housing 41 Plug housing 42 Plug contact 42a Clamping piece H2 Threaded solder material G3, G5 Conductor holding groove G4, G6 Solder holding groove

Claims (5)

Each of the plurality of contacts and the cable conductors arranged in parallel shape, in the cable electrical connector to be electrically connected collectively via a solder material disposed to extend along the direction of the parallel,
Each of the contacts is provided with a sandwiching piece composed of a pair of projecting members that hold both the cable conductor and the solder material by projecting one end portion of the contact into a bifurcated shape .
The sandwiching pieces made of the pair of protruding members are arranged so as to be displaced from each other in both the direction in which the cable conductor extends and the parallel direction of the contacts ,
Clamping piece consisting of the pair of projecting members, the provided adjacent parallel direction of the contact so as to form a conductor holding groove for accommodating the cable conductor, and protrusion of the pair forming the conductor holding groove The sandwiching piece made of a member forms a solder holding groove that accommodates the solder material by being displaced from each other in the extending direction of the cable conductor ,
When the holding pieces made of the pair of protruding members are viewed in the extending direction of the cable conductor, the conductor holding grooves are formed between the pair of holding pieces, and the pair of protruding members are arranged in the parallel direction of the contacts. cable for electrical connectors, characterized in that said solder retaining groove between each other the pair of clamping pieces are formed when viewed clamping piece made of.   2. The electrical connector for a cable according to claim 1, wherein the conductor holding groove and the solder holding groove are formed in a substantially V shape, a substantially U shape, or a substantially inverted trapezoidal shape.   2. The cable electrical connector according to claim 1, wherein the cable conductor is an outer conductor or a center conductor of a coaxial cable, or a core wire of an insulated cable. Solder material is arranged to extend along the parallel direction of multiple contacts and cable conductors arranged in parallel in the electrical connector, and the cable conductors are electrically connected to the contacts collectively via the solder material In the cable connection method
State claims 1 conductor holding groove is formed by a pair of holding pieces provided on the contacts of the description and the solder holding groove, and holds the cable conductors and the solder material by accommodating the cable conductors and the solder material, respectively Then, the cable connection method is characterized in that the solder material is melted.   5. The cable connection method according to claim 4, wherein the melting of the solder material is performed without using a heater head and without contacting the cable conductor and the solder material.

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