JP7249157B2 - connector terminal - Google Patents

Description

TECHNICAL FIELD The present disclosure relates to a connector terminal that is used by being connected to an electric wire.

2. Description of the Related Art Conventionally, among connector terminals constituting a connector, there is known a piercing terminal that conducts connection to an electric wire having a core wire in which a plurality of wires are twisted and bundled when connecting the terminal and a cable. (See Patent Document 1, for example).

For example, Patent Literature 1 discloses a piercing terminal configuration that is connected to an electric wire (cable) whose core wire is covered with an insulating covering material. On the bottom plate of the wire connecting portion, which has a substantially recessed cross-section for receiving the connection end of the wire, a piercing portion that contacts the core wire inside the wire when inserted while breaking through the wire insulation coating is formed from the side plate of the connecting portion. A plurality of them are cut and erected in the connection direction of the electric wire.

However, in the technique disclosed in Patent Document 1, the width of the wire connecting portion having a substantially U-shaped cross section is fixed, and the piercing portion is formed in the center. There is a possibility that the piercing part deviates from the center of the wire and sticks. Therefore, when attempting to connect cables with different diameters to respective terminals, it is necessary to have a wire connecting portion having a width that matches the thickness of each cable, and thus multiple types of terminals are required. In addition, since the structure is cut and raised from the side plate, a plurality of piercing parts are arranged side by side in the direction of connection of the electric wire at intervals, so the length of the connecting part of the terminal becomes long and the terminal becomes large. There was a problem.

Japanese Patent Application Laid-Open No. 2003-249280

The present disclosure has been made in view of the above problems, and an object thereof is to provide a connector terminal that can be connected to cables of different diameters and that can be miniaturized.

The present disclosure has been proposed to achieve the above object, and an aspect according to the present disclosure provides a connector terminal connected by piercing to an end of a cable having conductors covered with an insulating covering material, wherein the connector The terminal includes a cable connection portion for connecting a cable by piercing, and the cable connection portion is raised from a flat plate-shaped base portion, and a pair of first plate-like portions whose tip sides are closely opposed to each other in a direction in which the cable is sandwiched. An insertion blade that is inserted into the cable is provided on the tip end side, and the tip of the insertion blade is arranged in a stepped manner in the rising direction.
In another disclosure, the cable connecting portion includes a pair of second plate-shaped pieces raised from a flat plate-shaped base portion, the tip sides of which are opposed in a direction in which the cable is sandwiched, and the pair of second plate-shaped pieces The pieces face each other with their tip sides being spaced apart wider than the pair of first plate-like pieces, and an insertion blade inserted into the cable is provided on the tip side, and the tip of the insertion blade is the standing piece. They are arranged at the same height in the upward direction.
Further, according to the present disclosure, the cable connecting portion includes a pair of third plate-shaped pieces raised from a flat plate-shaped base portion, and the tip sides of the third plate-shaped pieces are opposed in a direction in which the cable is sandwiched, and the pair of third plate-shaped pieces are , the tip sides thereof face each other so as to sandwich the cable from the outside of the insulating coating material , and the tips thereof are arranged at the same height in the rising direction.

According to the present disclosure, since the cable is not excessively torn, a reliable connection is possible even if cables with different diameters are inserted, and the connecting part of the cable can be shortened, so that the size of the connector can be reduced. can be planned.

1 is a perspective view showing a connector pair using cable connectors according to an embodiment; FIG. It is a perspective view which shows a cable connector from the frontage side. 3(a) is a perspective view showing the cable connector from the cable side, FIG. 3(a) is the initial state, FIG. 3(b) is the state where the cable is inserted into the pair of cable housings, and FIG. FIG. 3(d) shows a state in which the pair of cable housings are temporarily held, and FIG. 3(e) shows a state before the pair of cable housings are attached to the main housing. FIG. 3(f) shows the state after the pair of cable housings have been attached to the main body housing, and FIG. 3(g) shows the state in which the pair of cable housings are fully held. Fig. 3 is an exploded perspective view showing the body housing and a pair of cable housings from the frontage side; Fig. 3 is an exploded perspective view showing the main body housing and the pair of cable housings from the cable side; 6(a) is a plan view and FIG. 6(b) is an arrow EE in FIG. 1 shows a cross-sectional view; FIG. 7(a) is a plan view and FIG. 7(b) is a view taken along line FF of FIG. 7(a). FIG. 1 shows a cross-sectional view; FIG. It is a perspective view which shows the displacement of a temporary holding state of a pair of cable housings, and a permanent holding state, Comprising: Fig.8 (a) shows a temporary holding state, FIG.8(b) shows a permanent holding state. 9(a) is a plan view, and FIG. 9(b) is a cross-sectional view taken along the line CC, showing a pair of cable housings in a temporarily held state. Fig. 10(a) is a plan view and Fig. 10(b) is a cross-sectional view taken along the line DD, showing the main holding state of a pair of cable housings. 11(a) is a perspective view, and FIG. 11(b) is a cross-sectional view taken along line BB of FIG. 11(a). FIG. It is a figure which shows a terminal, Comprising: (a) shows a perspective view, (b) shows a side view, (c) shows a top view. It is a perspective view which expands and shows the cable connection part of a terminal. It is a figure explaining the position control part of the cable connection part of a terminal. It is a figure explaining the 1st puncture part of the cable connection part of a terminal. It is a figure explaining the 2nd puncture part of the cable connection part of a terminal.

Hereinafter, embodiments according to the present disclosure will be described in detail with reference to the drawings. The same reference numerals are assigned to the same elements throughout the description of the embodiment. In the description, the surface of the cable connector to which the object to be connected is attached is the front (front), the opposite side is the rear (rear), and the surface that continues to the right as viewed from the front is the right side (right). , the surface that continues to the left side as viewed from the front side will be described as the left side surface (left side), the upper side as viewed from the front side will be referred to as the upper wall portion (upper), and the lower side as viewed from the front side will be referred to as the lower wall portion (lower side). .

(embodiment)
(connector)
FIG. 1 is a perspective view showing a connector assembly CN using a cable connector 10 according to this embodiment. Here, a combination of wire-to-board connectors is shown as a connector assembly CN, comprising a plug connector PL including a cable connector 10 and a receptacle connector RECP attached to a board CB. The application of the cable connector 10 is not limited to the illustrated embodiment, and the plug connector PL may be of the substrate type and the receptacle connector RECP may be of the cable type as long as the present embodiment can be applied. Also, both of them may be of the cable type.

The plug connector PL and the receptacle connector RECP are covered with a conductive shell, and the outer peripheral surface of the shell of the plug connector PL is further covered with an insulating hood. The shell of the receptacle connector RECP is fixed in place on the board CB and connected to ground. The plug connector PL and receptacle connector RECP may lock each other when mated.

(cable connector)
FIG. 2 is a perspective view showing the appearance of the cable connector 10 with the hood and shell removed from the plug connector PL. The cable connector 10 includes a pair of cable housings 20 (upper cable housing 20A, lower side cable housing 20B), and a body housing 30 having a terminal support portion 32 (see FIGS. 4 and 5) in which terminals 40 are arranged and which is mounted and fixed between the pair of cable housings 20. As shown in FIG. The cable housing 20 and the body housing 30 are made of an insulating material such as resin.

The pair of cable housings 20 has a temporary holding mechanism, and is maintained in a temporary holding state in which the terminal supporting portions 32 are relatively separated from each other prior to mounting the terminal supporting portions 32 therebetween. When fixed between the two, it is in a main holding state in which they are relatively close to each other. Although specific aspects of the temporary holding mechanism will be described later, an outline of the temporary holding state and the full holding state will be described in advance with reference to FIG.

First, as shown in FIG. 3A, a pair of cable housing 20 and cable 50 are prepared as an initial state. Then, the cable 50 is inserted into the pair of cable housings 20 as shown in FIG. 3(b). The cable 50 protruding from the pair of cable housings 20 is cut as shown in FIG. 3(c). In the conventional assembly process, the pair of cable housings 20 are temporarily fixed to the main body housing 30 separately from above and below at this stage. do.

As shown in FIG. 3D, the pair of cable housings 20 are temporarily held by combining the cable housings 20A and 20B before being attached to the main body housing 30. As shown in FIG. At that stage, the body housing 30 is prepared (as shown in FIG. 3(e)). The terminal support portion 32 (see FIGS. 4 and 5) of the body housing 30 is arranged between the pair of cable housings 20 which are maintained in the temporarily held state, as shown in FIG. 3(f). Then, as shown in FIG. 3G, the pair of cable housings 20 are displaced toward each other to be in the main holding state, and are fixed to the body housing 30 .
The step of cutting the cable 50 protruding from the cable housing 20 may be performed after the pair of cable housings 20 are temporarily held. By cutting the bundled cables 50 in the temporarily held state, the bundled cables 50 can be separated to minimize the portion where the cables 50 are exposed, and the cables can be easily and reliably processed.

The pair of cable housings 20 is shifted from the temporarily held state to the fully held state by pinching the pair of cable housings 20 with a tool such as pliers and applying a predetermined or greater external force in the approaching direction. In this holding state, the cables 50 inserted in the pair of cable housings 20 are pierced and connected to the terminals 40 (see FIGS. 4 and 5) arranged in the body housing 30 . These points will be described later.

(cable housing, body housing)
Details of the pair of cable housings 20 and the body housing 30 will be described with reference to FIGS. 4 and 5. FIG. 4 and 5 are exploded perspective views showing the cable housing 20 and main body housing 30 extracted from the cable connector 10. FIG. 4 is from the front (receptacle connector RECP side in FIG. 1), and FIG. They are views seen from the cable 50 side of FIG. 1). In addition, in FIG. 5, a part of the terminals 40 arranged in the main body housing 30 is extracted and drawn for reference.

The pair of cable housings 20 includes an upper cable housing 20A and a lower cable housing 20B, as shown in FIGS. The upper cable housing 20A and the lower cable housing 20B have the same configuration, and are arranged with respect to the main body housing 30 such that they are the same in the front-rear direction and symmetrical in the left-right direction. That is, the short side wall portion 22 (right side in FIG. 4) of the upper cable housing 20A is connected to the long side wall portion 27 (right side in FIG. 4) of the lower cable housing 20B and the long side wall portion 27 (FIG. 4) of the upper cable housing 20A. middle, left side) are arranged so as to correspond to the short side wall portion 22 (left side in FIG. 4) of the lower cable housing 20B. Since the upper cable housing 20A and the lower cable housing 20B have the same configuration, the upper cable housing 20A and the lower cable housing 20B will be referred to as the cable housing 20 below.

The cable housing 20 includes an upper wall portion 21, a lower wall portion 25, an insertion hole 200 between which the cable 50 is inserted, and a flat surface extending from the upper wall portion 21 toward the terminal holding portion 32 as one side wall portion. A relatively short wall portion 22 extending in a shape, that is, a short side wall portion 22 shorter than a long side wall portion 27 to be described later, and a stepped stepped portion as the other side wall portion so that the upper wall portion 21 side is recessed. It has a relatively long side wall portion extending from the upper wall portion 21 toward the terminal support portion 32 side, that is, a long side wall portion 27 longer than the short side wall portion described above. In addition, here, a mode in which five insertion holes 200 are provided is shown, but of course, the number is not limited.

The short side wall portion 22 has a rib-shaped guide portion 23 that protrudes outward from the surface thereof and extends in the vertical direction, and a rib-shaped engaging claw 24 along the front-rear direction on the edge portion on the side of the terminal support portion 32 . , has The long side wall portion 27 has a vertically notched slit 28 and a main body guide protrusion 29 extending in a rib shape in the front-rear direction in a recessed portion on the side of the upper wall portion 21 . Further, the long side wall portion 27 has a plurality of protrusions on its inner surface, as will be described later in detail.

A guide portion 23 formed in the short side wall portion 22 of one cable housing 20 slides along a slit 28 formed in the long side wall portion 27 of the other cable housing 20 when holding the pair of cable housings 20 together. By moving (see FIG. 3(d)), the pair of cable housings 20 can be easily aligned. The end portion of the long side wall portion 27 of the slit 28 is formed in a widened tapered shape so that the guide portion 23 can be easily brought in. As shown in FIG.

When the pair of cable housings 20 are held together, the engaging claws 24 formed on the short side wall portion 22 of one cable housing 20 are provided on the inner surface of the long side wall portion 27 of the other cable housing 20 . Stepwise engagement with the projection. This stepwise engagement brings the pair of cable housings 20 into the above-described temporary holding state or full holding state. This point will be described later in detail.

The main body guide protrusions 29 vertically move the main body housing 30 with respect to the pair of cable housings 20 when the terminal support portions 32 of the main body housing 30, which will be described later, are inserted between the pair of cable housings 20 in the temporarily held state. and perform alignment in the front-back direction.

The lower wall portion 25 of the cable housing 20 includes an umbrella-shaped main body engaging protrusion 26 extending toward the terminal support portion 32 side of the main body housing 30 near the short side wall portion 22 on the rear end side, and a long side wall portion. 27 and a recess 26b. When the pair of cable housings 20 are held together, the body engaging protrusion 26 of one cable housing 20 is received in the recess 26b of the other cable housing 20 in the fully held state.

The body housing 30 includes an upper wall portion 31, a side surface 34, a front surface 37, an opening 38 connected to the receptacle connector RECP at the front surface 37, and a terminal support portion 32 that supports the terminals 40 and extends rearward. , has

On the rear side of the side surface 34, extending guide portions 35 are provided at positions corresponding to concave portions on the upper wall side of the long side walls 27 of the pair of cable housings 20 (rear lower right and rear upper left in FIG. 4). It is provided. A narrowed portion 36 is provided between the guide portion 35 and the side surface 34 so as to be concave when viewed from the side. When the terminal support portion 32 of the main body housing 30 is arranged between the pair of cable housings 20 in the temporary holding state (see FIG. 3(f)), the guiding portion 35 extends from the front side of the cable housing 20 to the rear side. It moves along the concave portion of the long side wall portion 27 of the cable housing 20 and is arranged between the body guide projection portion 29 and the step. Then, when the pair of cable housings 20 are in the fully held state (see FIG. 3(g)), the body guide protrusion 29 engages with the constricted portion 36. As shown in FIG.
In this embodiment, the upper cable housing 20A and the lower cable housing 20B have the same structure to reduce the number of members related to the connector, but the present invention is not limited to this. For example, the short side walls 22 can be formed on both left and right sides of one cable housing, and the long side walls 27 can be formed on both left and right sides of the other cable housing.
In this case, one cable housing having a substantially rectangular parallelepiped shape without projections (long side wall portions 27) is attached between a pair of spaced long side wall portions 27 formed on the other cable housing. Therefore, the work up to temporary holding is facilitated.

The terminal support portion 32 has two notches 33 at its rear end. When the pair of cable housings 20 are held together, the body engaging projections 26 of the pair of cable housings 20 are engaged with the notches 33 of the terminal support portions 32 in the final holding state, thereby holding the pair of cable housings 20 together. The body housing 30 is fixed.

Terminals 40 are arranged on the front and rear surfaces of the terminal support portion 32 . That is, the terminal 40 is arranged between the pair of cable housings 20 in the temporarily held state. Here, a mode in which five terminals 40 are provided on each of the front and back surfaces is shown, but the number is, of course, not limited. As shown in FIG. 12, the terminal 40 has a cable connecting portion 41 on the rear side (the side of the terminal support portion 32; see FIG. 5), a contact portion 43 on the front side (the side of the front surface 37; A mounting portion 42 is provided in the middle, and the details of the terminal 40 will be described later.

(spring mechanism of cable housing)
The inside of the pair of cable housings 20 will be described with reference to FIGS. 6 and 7. FIG. 6 shows a state in which the cable 50 is being inserted into the pair of cable housings 20 in the temporarily held state, and FIG. 7 shows a state after the cable 50 has been inserted into the pair of cable housings 20 in the temporarily held state. 7(b) and 7(b) are cross-sectional views taken along lines EE and FF, which are center lines in the longitudinal direction of FIGS. 6(a) and 7(a), respectively.

Each of the pair of cable housings 20 has a spring mechanism 201 inside the insertion hole 200 for pressing the inserted cable 50 as shown in FIGS. 6(b) and 7(b). The spring mechanism 201 is formed as a cantilever spring that extends obliquely rearward from the lower wall portion 25 toward the upper wall portion 21 inside the insertion hole 200 . When the cable 50 is not inserted into the spring mechanism 201 , the tip 202 of the spring mechanism 201 is closer to or in contact with the upper wall portion 21 than the diameter of the cable 50 . When the cable 50 is inserted into the insertion hole 200 , the spring mechanism 201 is pushed by the cable 50 and bent toward the lower wall portion 25 .

When the cable 50 is inserted into the insertion hole 200 , the cable 50 is pushed by the tip 202 and pushed against the upper wall portion 21 by the reaction force of the spring mechanism 201 . As a result, even when the diameter of the cable 50 is smaller than the diameter of the insertion hole 200, it is possible to prevent the cable 50 from falling out of the cable housing 20 during assembly. As a result, it becomes possible to deal with cables 50 of various diameters with one cable housing 20 .

(Cable housing temporary holding mechanism)
A temporary holding mechanism for the pair of cable housings 20 will be described with reference to FIGS. 8 to 11. FIG. 8A and 8B schematically show the displacement of the pair of cable housings 20 in the temporary holding state and the permanent holding state, with FIG. 8(a) showing the temporary holding state and FIG. 8(b) showing the permanent holding state. 9(b) and 10(b) are arrows of the temporary holding state and the permanent holding state on the CC line and the DD line, which are the left and right directions in FIGS. 9(a) and 10(a), respectively. It is a cross-sectional view. FIG. 11 shows the cable connector 10 in the fully held state.

In the pair of cable housings 20, as shown in FIG. 8A, the guide portion 23 provided on the short side wall portion 22 of one cable housing 20 is biased against the long side wall portion 27 of the other cable housing 20. The short side wall portion 22 and the long side wall portion 27 are engaged in a temporary holding state by being inserted into the slit 28 and aligned. At this stage, one main body engaging projection 26 is not received in the other recess 26b.

This temporary holding state will be described with reference to FIG. 9(b). The long side wall portions 27 of the pair of cable housings 20 have a first projection portion 271, a second projection portion 272 and a third projection portion 273 on their inner surfaces in order from the ends.
The first projecting portion 271 is a rib-like projection extending in the front-rear direction on the edge of the distal end of the long side wall portion 27, and is engaged with the engaging claw 24 so that the upper and lower cable housings 20A and 20B are not separated in the temporarily held state. engage.
The second protrusion 272 is a rib-like protrusion parallel to the first protrusion 271 near the center of the long side wall 27 in the direction of the upper wall. restrict movement to
That is, the engaging claws 24 of one cable housing 20 are engaged with the first projections 271 of the long side wall 27 of the other cable housing 20, and their movement is restricted by the second projections 272 of the cable housing. 20A and 20B are held so as not to move relative to each other, and the pair of cable housings 20 are temporarily held.
The third projecting portion 273 is also a rib-like projection extending in the front-rear direction, and engages with the engaging claw 24 at the position where the upper and lower cable housings 20A and 20B are closest to each other, that is, at the position where they are fully held. Both cable housings 20 are held in the main holding state.

Here, the second projecting portion 272 is formed so as to be deformable by an external force greater than or equal to a predetermined amount. Specifically, the second protrusion 272 is thinner than the first protrusion 271 and the third protrusion 273 in the relative movement direction of the cable housing 20, and the third protrusion 273 is thinner than the first protrusion 271 and the third protrusion 273. A side base portion 272b is recessed. In addition, while the first protrusion 271 and the third protrusion 273 extend in the front-rear direction over the entire length of the long side wall 27 except for the slit 28, the second protrusion 272 It is set shorter than the protrusion 271 and the third protrusion 273 (see FIGS. 4 and 5). Therefore, when an external force is applied from the outside of the cable housings 20A and 20B and the tip of the short side wall portion 22 pushes the second protrusion 272 due to the external force, the second protrusion 272 is deformed so as to break off from the base 272b. It falls down toward the tip of the long side wall portion 27 .

However, the force for deforming the second protrusion 272 is designed to be a predetermined external force or more when a tool such as pliers is used. Therefore, when assembling the pair of cable housings 20 in the temporarily held state, the second protrusions 272 will not be erroneously deformed if they are assembled with an external force less than a predetermined amount. and the temporary holding state is ensured.
After the terminal support portions 32 of the main body housing 30 are inserted into the pair of cable housings 20 in the temporarily held state, both upper wall portions 21 are held by pliers as shown in FIG. 8(b). When pressed by an external force greater than a predetermined amount, the second protrusion 272 is deformed and the engagement claws 24 are no longer restricted, so that the pair of cable housings 20 come close to each other, one short side wall 22 and the other long side wall. Portion 27 is engaged in the main holding state. At this stage, one body engaging projection 26 passes through the notch 33 of the terminal support portion 32 of the body housing 30 and is received in the other recess 26b.

This main holding state will be described with reference to FIG. 10(b). The engaging claw 24 of one of the short side walls 22 deforms and passes through the second protrusion 272 of the other long side wall 27 and then engages with the third protrusion 273 . As a result, the pair of cable housings 20 are held together to be in the final holding state. At this time, the deformed second protrusion 272 is sandwiched between one short side wall 22 and the other long side wall 27, so that the cable connector 10 after assembly is not adversely affected. With such a configuration in which the second protrusion 272 is deformed, the amount of protrusion of the second protrusion 272 can be increased, and the temporary holding state can be stably secured.
The second protrusion 272 does not necessarily have to be deformed, and may be a rib-like protrusion having, for example, a trapezoidal cross section, which the engaging claw 24 engages in a temporarily held state and overcomes with a predetermined external force.

FIG. 11 shows the cable connector 10 assembled in this holding state. FIG. 11(b) is a cross-sectional view of the main holding state taken along the line BB, which is the center line in the front-rear direction of FIG. 11(a). In the main holding state, as shown in FIG. 11B, the pair of upper wall portions 21 of the cable housing 20 and the upper wall portion 31 of the main body housing 30 are flat. The cable 50 inserted into the insertion hole 200 and pressed toward the upper wall portion 21 by the tip 202 of the spring mechanism 201 is connected by piercing to the terminal 40 arranged on the terminal support portion 32 of the body housing 30 . be. Details of the piercing connection of the terminal 40 will be described later.

(Terminal)
Details of the terminal 40 and piercing connection with the cable 50 will be described with reference to FIGS. 12 to 16. FIG. 12 and 13 show the configuration of the terminal 40. FIG. 12 shows the terminal 40 as a whole, and FIG.

The terminal 40 has, as shown in FIG. 12, a cable connection portion 41, a contact portion 43, and an attachment portion 42 therebetween. The cable connection portion 41 is positioned on the rear side (on the side of the terminal support portion 32; see FIG. 11), and is connected to the cable 50 while the pair of cable housings 20 are fully held. The contact portion 43 is positioned on the front side (on the front surface 37 side; see FIG. 11) and is connected to the receptacle connector RECP through the opening 38 . Terminals 40 are attached to body housing 30 by attachment portions 42 .

Terminal 40 is a piercing connection so that cable 50 can be easily connected. That is, the cable 50 is pressed against the cable connection portion 41 of the terminal 40 by displacing the cable housing 20 with the cable 50 attached thereto from the temporarily held state to the fully held state. Then, the first pierce portion 412 and the second pierce portion 413 formed in the cable connection portion 41 are pierced (inserted) into the outer insulator 51 of the cable 50, and come into contact with the inner core wire 52 to be electrically connected. (See FIGS. 15(a) to 15(c), etc.).

As shown in FIG. 13, the cable connection portion 41 has a first pierce portion 412, a cable position control portion 411, and a second pierce portion 413 in order from the rear end side. Each of these is formed of a pair of left and right plate-shaped pieces that are erected vertically from a plate-shaped base. As a pair of plate-shaped pieces, the cable position control part 411 is formed by one cable position control part 411a and the other cable position control part 411b, and the first pierce part 412 is formed by one first pierce part 412a and the other first pierce part. From 412b, the second pierce part 413 is composed of one second pierce part 413a and the other second pierce part 413b.
The plate-shaped base portion is formed parallel to the surface of the terminal support portion 32 so as to be arranged on the terminal support portion 32 of the main body housing 30 .

The cable position control portions 411 are formed such that one cable position control portion 411a and the other cable position control portion 411b are spaced apart and have the same height. The distance between the two cable position control portions 411a and 411b is set to be the same as or slightly smaller than the thinnest diameter among the different diameters of the cable to be attached. When a cable with a large diameter is attached, the cable is attached by spreading both cable position control portions 411a and 411b.
The height of the cable position control portion 411 is set such that the tip thereof almost reaches the upper wall portion 21 when the cable housing 20 is positioned in the final holding state. The cable 50 is pushed by the upper wall portion 21 and pressed against the cable connecting portion, so that even cables with different diameters can be positioned between the two cable position control portions 411a and 411b.
When the cable housing 20 is fully held, both the thin cable and the thick cable are located where the outer circumference is pushed by the tip of the cable position control section 411 or the upper wall section 21 in the vicinity thereof. That is, the cable 50 with a small diameter is arranged at a shallow insertion position with respect to the first pierce portion 412, and the cable 50 with a large diameter is arranged at a deep insertion position.

The cable position control portion 411 aligns the central portion of the cable 50 with the cable connection portion 41 . When the cable 50 is pressed against the cable connecting portion 41 by being pushed by the upper wall portion 21 of the cable housing 20, the cable position control portion 411 moves the center portion of the cable 50 as shown in FIG. 14(a). is deviated from the center line CL of the cable connecting portion 41, the central portion of the cable 50 is guided to the center line CL by the pair of tip portions 4111 as shown in FIG. 14(b). Both the left tip portion 4111a and the right tip portion 4111b of the pair of tip portions 4111 are tapered toward the center line CL side. As a result, the first piercing portion 412 can be positioned so as to be accurately pierced, and the electrical connection between the first piercing portion 412 and the second piercing portion 413 can be made more reliable. .

In particular, when the diameter of the cable 50 is small, the possibility of deviation in the left-right direction relative to the cable connecting portion 41 relatively increases, and in such a case, the cable position control portion 411 is useful. However, when the insertion holes 200 of the pair of cable housings 20 and the diameters of the cables 50 are fitted, in the case where the displacement in the left-right direction is controlled by the cable housing 20 side, cable position control Part 411 may be omitted.

The first pierced portions 412 are formed so that one first pierced portion 412a and the other first pierced portion 412b are in close contact with each other and have a stepped height corresponding to the length of the gap L1. The tip side thereof is formed into pyramid-shaped insertion blades 4121a and 4121b having slopes on the rear and sides.
The first pierce part 412 pierces the central part of the insulator 51 of the cable 50 and is inserted into the inner core wire 52 (see FIG. 15) to make contact therewith. In the present embodiment, the first pierced portion 412a on one side and the first pierced portion 412b on the other side are described as being in close contact with each other. It can also be in a state where

When the cable 50 is pressed against the cable connection portion 41, as shown in FIGS. Also, the insulator 51 can be prevented from tearing too much. That is, as shown in FIG. 15(a), when a cable 50S having a small diameter is pierced, the first piercing portion 412a, which protrudes relatively long, has an insertion blade 4121a that cuts through the insulator 51 of the cable 50S. It breaks through the central part and penetrates through the core wire 52 to make contact. As a result, the cable connection portion 41 and the core wire 52 can obtain sufficient contact for connection of thin conductors. The tip of the other first pierce portion 412b, which protrudes relatively short, breaks through the insulator 51, but does not penetrate the insulator 51 up to the root, which is the beginning of the slope. Take care not to break through the thin cable 50S excessively. Thus, it is possible to prevent the cable 50 from being torn excessively while sufficiently securing the conduction between the first pierce portion 412 and the core wire 52 .

On the other hand, as shown in FIG. 15(b), when a cable 50M having a relatively large diameter is pierced, the insertion blade 4121a of the first piercing portion 412a, which protrudes relatively long, is the same as described above. The insertion blade 4121b of the other first piercing portion 412b, which penetrates and contacts the core wire 52 and protrudes relatively short, penetrates the insulator 51 to its root.
Also, as shown in FIG. 15(c), when a cable 50L having a larger diameter is pierced, the insertion blade 4121a of one of the first piercing portions 412a protruding relatively long penetrates the core wire 52 in the same manner as described above. to contact. Then, the insertion blade 4121b of the other first pierce portion 412b, which protrudes relatively short, is inserted into the core wire 52 to the root. Then, sufficient contact can be obtained as a connection as a thick conductor. Even if the insertion blade 4121b penetrates deeply into the insulator 51 to the root, the cable 50L is not torn because the diameter of the cable 50L is large.

As described above, the first pierced portion 412 is formed so that one first pierced portion 412 a and the other first pierced portion 412 b are stepped. can be adjusted. As a result, it is possible to prevent a decrease in the cable holding force of the cable connection portion 41 due to excessive tearing of the cable 50 while ensuring sufficient contact according to the diameter of the cable 50, that is, the thickness of the core wire. .
As for the diameter of the cable 50, for example, according to AWG (American Wire Gauge Standard), the cable 50S with a small diameter is AWG#26, the cable 50M with a slightly thicker diameter is AWG#24, and the cable 50L with a larger diameter is AWG#26. 22 can be mentioned.

The base portion 4122 of the first pierce portion 412 is formed curved, and both the one first pierce portion 412a and the other first pierce portion 412b have curved base portions 4122a and 4122b. As a result, the first pierced portions 412 can be brought closer to each other while the width of the plate-like base portion described above is increased, and can be formed in close contact with each other. When one first pierce portion 412a and the other first pierce portion 412b are close or in close contact with each other, when the cable 50 is pressed against the insertion blade 4121a and then the insertion blade 4121b, , support each other and prevent deformation by falling inward. Moreover, since the width of the plate-like base can be widened, it is possible to prevent the cable connecting portion 41 from falling sideways. Therefore, the insertion blades 4121a and 4121b can break through the cable 50 smoothly.

In the present embodiment, the insertion blade 4121b of the other first pierce portion 412b is formed to have a more obtuse angle with respect to the cable 50 than the insertion blade 4121a of the first pierce portion 412a. , but may be an acute angle. As a result, the insertion blade 4121b of the other first pierce portion 412b is made more difficult to break the cable 50 than the insertion blade 4121a of the first pierce portion 412a. It can help prevent excessive tearing of the cable 50 . Although the insertion blades 4121a and 4121b are formed in a single-edged shape, they may be formed in a double-edged shape.

The pair of second pierce parts 413 pierce the peripheral edge part of the insulator 51 of the cable 50 to pinch and contact the core wire 52 inside.
The second pierced portions 413 are formed such that one second pierced portion 413a and the other second pierced portion 413b are close to each other with an interval L2 and have the same height. The tip side thereof is formed into pyramid-shaped insertion blades 4131a and 4131b having slopes on the inside and the front.
As shown in FIG. 16(a), the pair of second pierce parts 413 are arranged so that the insertion blades 4121a and 4121b of the pair of first pierce parts 412 are in close contact with each other with a clearance L2. 4131a and 4131b. Since the pair of second piercing portions 413 are formed to slant toward the inside (the center line CL of the cable connecting portion 41), after piercing the peripheral portion of the cable 50 and breaking through the insulator 51, As shown in FIG. 16(b), the core wire 52 is sandwiched from both sides and brought into contact. This, together with the first piercing portion 412 that pierces the central portion of the cable 50, makes the connection between the cable 50 and the terminal 40 even more reliable.

As with the first pierced portion 412, the base portion 4132 of the second pierced portion 413 is formed to be curved. It has a base 4132b. As a result, the first pierced portion 412 can be formed close to the plate-shaped base while widening the width of the plate-shaped base, and the cable connection portion 41 can be prevented from falling sideways when the cable 50 is pressed. . Therefore, the insertion blades 4131a and 4131b can break through the cable 50 smoothly.

Although preferred embodiments of the present disclosure have been described in detail, the present disclosure is not limited to the embodiments described above, and various modifications and changes can be made within the scope of the gist of the present disclosure described in the claims. It is possible.

Reference Signs List 10 Cable connectors 20, 20A, 20B Cable housing 21 Upper wall portion 22 Short side wall portion 23 Guide portion 24 Engaging claw 25 Lower wall portion 26 Main body engaging projection 27 Long side wall portion 28 Slit 29 Main body guide protrusion 30 Main body housing 31 Upper wall 32 Terminal support 33 Notch 34 Side 35 Guidance 36 Constricted portion 37 Front 38 Opening 40 Terminal 41 Cable connection Part 411... Cable position control part 412... First piercing part 413... Second piercing part 42... Mounting part 43... Contact part 50... Cable 51... Insulator 52... Core wire

Claims (3)

In a connector terminal that is connected by piercing to the end of a cable whose conductor is covered with an insulating coating material,
The connector terminal includes a cable connection portion for connecting a cable by piercing,
The cable connecting portion includes a pair of first plate-like pieces raised from a flat plate-like base portion and having tip sides facing each other closely in a direction in which the cable is sandwiched,
A connector terminal, wherein an insertion blade to be inserted into the cable is provided on the tip end side, and the tip of the insertion blade is arranged in a stepped manner in the rising direction. The cable connecting portion includes a pair of third plate-shaped pieces raised from a flat plate-shaped base portion and having tip sides thereof opposed to each other in a direction in which the cable is sandwiched,
2. The connector terminal according to claim 1, wherein the pair of third plate-shaped pieces are arranged opposite to each other so that the ends of the third plate-shaped pieces sandwich the cable from the outside of the insulating covering material . The cable connecting portion includes a pair of second plate-shaped pieces raised from a flat plate-shaped base portion, and the tip sides of the second plate-shaped pieces facing each other in a direction in which the cable is sandwiched,
The pair of second plate-shaped pieces are opposed to each other with their distal ends spaced apart wider than the pair of first plate-shaped pieces, and the distal ends are provided with insertion blades to be inserted into the cable. The connector terminal according to claim 1 or 2, characterized by:

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