CN1937325A - Connector for connecting wire - Google Patents

Abstract

The elastic contact piece (33) of the joint (3) has a contact holding part (38) elastically contacting and holding the core wire (W1) of the electric wire (W) inserted into the joint receiving hole (12) Among them, the structure can be simplified and miniaturization can be expected. The elastic contact piece (33) has a turnback piece (34), an inclined piece (35) and an abutment piece (36), and forms a contact holding part forming hole (37) across the inclined piece (35) and the abutment piece (36), The end edge of the wire insertion port (13) side of the contact holding part forming hole (37) is set as a contact holding part (38), so that the contact holding part (38) is separated from the inner wall surface of the housing (1) without damaging the housing (1) The inner wall surface increases the preload of the elastic contact piece to the core wire, and suppresses the height dimension of the housing. A tool insertion hole (16) for inserting a disconnecting tool (5) is formed on the upper side of the joint receiving hole (12) of the housing (1), thereby simplifying the structure for disconnecting.

Description

Connector for wire connection

technical field

The present invention relates to a connector for connecting electric wires, for example, a connector for connecting electric wires for electrically connecting electric wires to a printed wiring board.

Background technique

Among the conventional connectors for electric wire connection, for example, the connector shown in FIG. 11 or FIG. 12 is disclosed.

The wire connection connector shown in Figure 11 has a housing 100 and a joint 110 held on the housing 100; The horizontal connecting piece 113 at the lower end of the vertical supporting piece 111,112, the terminal piece 115,116 extending downward from the lower end of the vertical supporting piece 111,112 and protruding to the outside of the housing 100, the upper end of one vertical supporting piece 111 to The elastically deformable elastic contact piece 118 folded back in the connector receiving hole 101 of the housing 100 is formed with an elastic contact holding portion 119 at the front end of the elastic contact piece 118 .

And when connecting with the electric wire W, insert the electric wire W from the electric wire insertion port 102 of the housing 100, press the core wire W1 between the contact holding part 119 of the elastic contact piece 118 and the vertical support piece 112, and press the elastic contact piece 118 Elastically deforming it, the contact holding portion 119 of the elastic contact piece 118 elastically contacts the core wire W1 and holds the core wire W1 between it and the vertical support piece 112 , thereby electrically connecting the wire W and the printed wiring board P.

Also, when pulling out the electric wire W, insert the tool J for disconnection from the tool insertion port 103 of the housing 100, and displace the elastic contact piece 118 to the position shown by the two-dot chain line, and release the clamping of the core wire W1 to pull it out. Go to Wire W.

12, the wire connection connector shown in FIG. 12 has a support member 200 for holding the printed circuit board P, a cover 210 for closing the joint accommodating recess 201 formed on the upper surface of the support member 200, and a cover 210 for holding the support member 200 and the cover. The joint 220 in 210; the joint 220 has a U-shaped support piece 221 arranged in the joint receiving recess 201 and supported in the support member 200 and the cover 210, a horizontal support piece 222 extending to one end thereof, and a horizontal support piece 222 on the horizontal support piece. 222 is extended from the front end of the terminal piece 223 that protrudes outward from the support member 200, and the elastically deformable elastic contact piece 225 that is folded back from the other end of the support piece 221 into the joint accommodation recess 201 is formed on the front end of the elastic contact piece 225. Contact holder 226 .

And when connecting with the electric wire W, insert the electric wire W from the electric wire insertion port 211 of the cover 210, press the core wire W1 between the contact holding part 226 of the elastic contact piece 225 and the support piece 221, press the elastic contact piece 225 to make it Elastically deformed, the contact holding portion 226 of the elastic contact piece 225 elastically contacts the core wire W1 to clamp the core wire W1 between it and the support piece 221 , and electrically connects the wire W and the printed wiring board P.

Moreover, when pulling out the electric wire W, the operating part 232 that can rotate around the fulcrum 231 is operated counterclockwise at the position indicated by the solid line in FIG. , so that the clamping of the core wire W1 can be released and the wire W can be pulled out (see, for example, FIG. 4 of Patent Document 1).

Patent Document 1: U.S. Patent No. 5,915,991

However, in the known example shown in FIG. 11, since it is a vertical connector in which the electric wire W is inserted vertically with respect to the circuit board surface of the printed circuit board P, there is a problem that the height cannot be suppressed.

Also, since the vertical supporting pieces 111 and 112 of the joint 110 are arranged to face each other in the joint receiving hole 101, there is a problem that the width dimension must be increased.

Therefore, there is a problem that the external shape is large (for example, length 10.0 mm, width 8.5 mm, height 12.5 mm in case of 2 poles).

In addition, in the known example shown in FIG. 12, the operation lever 230 and the like must be provided, and there is a problem that the structure becomes complicated.

Contents of the invention

The present invention has been made in view of the foregoing problems, and an object of the present invention is to provide a connector for electric wire connection that can simplify the structure and realize miniaturization (for example, height reduction).

The invention described in claim 1 is a connector for connecting electric wires, comprising a case having an electric wire insertion opening formed on the front surface and a terminal receiving hole communicating with the electric wire insertion opening formed inside, and a terminal held in the housing. , the aforementioned connector has: a supporting piece supported on the lower side of the aforementioned connector receiving hole of the aforementioned casing; an elastic contact piece is folded back from the side of the aforementioned wire insertion port of the aforementioned supporting piece to be elastically deformably disposed on the aforementioned connector receiving hole. and is in elastic contact with the core wire of the electric wire inserted from the aforementioned wire insertion port; it is characterized in that: the aforementioned elastic contact piece has a turn-back piece provided continuously on the side of the aforementioned wire insertion port of the aforementioned support piece, A slanted piece provided continuously at the front end and inclined toward the upper side of the joint receiving hole of the housing, abutting against the inner surface of the upper side wall of the joint receiving hole continuously provided at the front end of the inclined piece A contact holding portion forming hole is formed across the inclined piece and the abutting piece, and the end edge of the contact holding portion forming hole on the side of the electric wire insertion port is set to be in contact with the core wire of the inserted electric wire and hold the core. In the wire contact holding portion, a tool insertion hole for inserting a disconnecting tool is formed in a portion of the upper side portion of the connector receiving hole of the housing that abuts against the contact piece.

The invention described in claim 2 is the invention described in claim 1, wherein the contact holding portion forming hole is formed in a rectangular shape in plan view, and the lateral width thereof is formed to be larger than the lateral width of the wire insertion opening.

The invention described in claim 3 is the invention described in claim 1 or 2, characterized in that: on the part of the upper side of the joint receiving hole of the housing that is in contact with the abutment piece, there is formed a visually visible The presence or absence of the core wire of the electric wire inserted from the electric wire insertion port.

The invention described in Claim 4 is the invention described in Claim 3, wherein the window hole and the tool insertion hole are continuously formed.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, characterized in that a portion of the contact piece is cut downward from the contact piece to form a hole for insertion from the wire insertion port. The stopper part where the tip of the core wire of the electric wire abuts.

The invention of claim 6 is the invention of claim 5, characterized in that the hole for forming the contact holding portion is formed by punching a U-shaped hole and cutting a tongue formed by the U-shaped hole downward. The formed hole is formed, and the aforementioned cut-out tongue acts as a stopper.

In the invention described in claim 1, in a connector for electric wire connection having a housing and a joint, and the joint has a support piece and an elastic contact piece, since the elastic contact piece has a folded piece, an inclined piece, and an abutment piece, and straddles the The inclined piece and the abutting piece form a contact holding portion forming hole, and the end edge of the electric wire insertion port side of the contact holding portion forming hole is set as a contact holding portion that contacts the core wire of the electric wire and holds it, and the contact holding portion is separated from the housing. The inner surface of the upper side wall of the joint receiving hole can increase the preload of the elastic contact piece on the core wire without damaging the inner wall surface of the housing, and it is expected to suppress the height dimension and realize miniaturization.

In addition, a tool insertion hole is formed on the upper side wall of the joint receiving hole of the housing, so that the elastic contact piece can be pressed by the tool for disconnecting the connection inserted through the tool insertion hole to release the contact with the core wire, so the use can be simplified. A structure to release the connection with the electric wire.

In the invention described in claim 2, in the invention described in claim 1, the contact holding portion forming hole is formed in a rectangular shape in plan view, and its lateral width is formed to be larger than the lateral width of the electric wire insertion opening, so that the electric wire can be The operation of inserting the core wire into the connector receiving hole is easy and the workability is improved.

In the invention described in claim 3, in the invention described in claim 1 or 2, a window hole is formed on the upper side of the joint receiving hole of the casing at the part that abuts against the abutting piece, so that the presence or absence of the joint can be visually observed. Since the core wire of the electric wire inserted from the electric wire insertion port can be visually judged whether the core wire of the electric wire contacts and is held on the contact holding part of the elastic contact piece.

In the invention described in Claim 4, in the invention described in Claim 3, the window hole and the tool insertion hole are continuously formed, so that the window hole and the tool insertion hole can be easily formed.

The invention according to claim 5 is the invention according to any one of claims 1 to 4, wherein the stopper portion is formed by cutting the contact piece downward from the contact piece, and contacts the electric wire inserted from the electric wire insertion port. The front end of the core wire prevents excessive insertion of the core wire of the wire, and limits the displacement of the elastic contact piece pressed by the connection release tool when the wire is released, preventing fatigue of the elastic contact piece.

According to the invention of claim 6, in the invention of claim 5, the contact holding portion forming hole is formed by a U-shaped hole and a hole formed by cutting the tongue piece, and the tongue piece cut out is used as the stopper, Therefore, the degree of freedom in designing the contact holding portion forming hole and the stopper portion can be increased.

Description of drawings

1 is a diagram showing an embodiment of a connector for electric wire connection according to the present invention, (a) is an enlarged sectional view taken along line A-A of FIG. 2 , and (b) is an enlarged perspective view showing a connector 3 in (a).

Fig. 2 is a plan view of the connector for electric wire connection according to the present invention.

Fig. 3 is a front view of Fig. 2 .

FIG. 4 is a bottom view of FIG. 2 .

FIG. 5 is a right side view of FIG. 2 .

FIG. 6 is a view showing the rear side of FIG. 3 .

FIG. 7 is a partial plan view showing the printed wiring board P in FIG. 1 .

Fig. 8 is a perspective view of Fig. 2 viewed from the front side (front side).

Fig. 9 is a perspective view of Fig. 2 viewed from the rear side (rear side).

FIG. 10 is an explanatory diagram of plug-in connection and disconnection of the electric wire W. FIG.

FIG. 11 is a cross-sectional view showing a known example 1. FIG.

FIG. 12 is a cross-sectional view showing a known example 2. FIG.

Detailed ways

1 to 9 show an embodiment of the connector for electric wire connection according to the present invention. In these figures, 1 denotes a housing, 3 denotes a connector, 5 denotes a tool for disconnecting a connection, 6 denotes a clamp, and P denotes a printed wiring harness. A substrate, W denotes an electric wire, W1 denotes a core wire of the electric wire W (for example, a single wire), and W2 denotes a covering portion of the electric wire W.

The casing 1 is integrally formed of insulating synthetic resin, and has a low rectangular parallelepiped shape (for example, length 9 mm, width 13 mm, height 2.7 mm).

On the casing 1, as shown in FIGS. 8 and 9 , a substantially rectangular cylindrical central through hole 11 penetrating in the front-rear direction, and a substantially square shape located on both sides of the central through-hole 11 and penetrating in the forward-rear direction are formed. Cylindrical joint receiving holes 12,12.

On the front surface side of the housing 1, an electric wire insertion port 13 and an electric wire engagement step 14 communicating with the joint receiving hole 12 are formed, and on the rear side of the housing 1, a joint insertion opening communicating with the joint receiving hole 12 is formed. 15.

The wire insertion opening 13 is formed to communicate with the joint receiving hole 12 at the upper side of the joint receiving hole 12 and has a substantially square cross section. The front side is formed in a tapered shape that expands from the communicating side in order to facilitate the insertion of the core wire W1. The front side opening end surface becomes a stepped surface of the wire engaging step portion 14 so that the covered portion W2 of the wire W does not enter into the terminal receiving hole 12 .

A tool insertion hole 16 and a window hole 17 are continuously formed in a portion located on the rear side of the upper side wall of the joint receiving hole 12 of the housing 1 .

The tool insertion hole 16 is used for inserting the tool 5 for releasing the connection, and is formed so as to be located on the rear side of the window hole 17, and the front edge of the window hole 17 is located on the front side of a stopper portion 39 of the joint 3 which will be described later. It is formed so that whether or not the core wire W1 of the inserted electric wire W is inserted into a predetermined position in the connector housing hole 12 can be visually checked through the window hole 17 .

On both sides of the case 1, as shown in FIG. 9 , there are formed clamp holding grooves 18, 18 opened on the front surface side and the bottom surface side, and the clamp holding grooves 18, 18 are pressed into and engaged with There are only clampers 6,6.

The joint 3 is formed by punching and bending a conductive metal plate having a thickness t (for example, t=0.25 mm).

The connector 3 is accommodated and held in the connector receiving hole 12 of the housing 1 from the connector insertion port 15, and has a catch that is pressed into and locked to the lower side portion (lower side wall) of the connector receiving hole 12 formed in the housing 1. The substantially rectangular support piece 31 in the groove, the strip-shaped terminal piece 32 provided continuously on the rear side of the support piece 31 , and the elastic contact piece 33 provided continuously on the front side of the support piece 31 .

The elastic contact piece 33 has a folded piece 34 folded from the front side to the rear side of the support piece 31 , an inclined piece 35 and an abutment piece 36 provided successively on the front end side of the folded piece 34 in this order.

The folded piece 34 is formed in a strip shape slightly narrower than the supporting piece 31, and after being folded back, it is formed to be substantially parallel to the inner surface of the upper side wall of the joint receiving hole 12, and the distance between the inner surface of the upper side wall and the inner surface of the upper side wall is formed at a distance from the core wire W1. About the same diameter or slightly larger.

The inclined piece 35 is formed in a band shape slightly wider than the folded piece 34, and is formed obliquely so as to approach the inner surface of the upper side wall of the joint receiving hole 12; the abutting piece 36 is formed to abut against the joint receiving hole with a pre-pressure 12 on the inner surface of the side wall.

In the inclined piece 35 and the abutting piece 36, there is formed a contact holding portion forming hole 37 which is substantially rectangular in plan view, and the front side end edge of the contact holding portion forming hole 37 serves as the core wire W1 of the electric wire W to be inserted. The contact holding portion 38 elastically contacts and holds it.

The contact holding portion forming hole 37 is formed by punching a U-shaped hole formed when the joint 3 is formed, and a hole formed by cutting a tongue formed by the U-shaped hole downward, and the cut tongue is used as stopper 39 .

The wire connection connector formed as described above is arranged at a predetermined position on the printed wiring board P shown in FIG. , P1 to be electrically connected to the circuit pattern of the printed wiring board P, and the clamp 6 is welded to the corresponding connection bosses P2, P2 of the printed wiring board P to stably fix the housing 1 on the printed wiring board P.

Next, insertion, connection, and disconnection of the electric wires W to the electric wire connection connectors connected and fixed on the printed wiring board P as described above will be described with reference to FIG. 10 .

(1) As shown in FIG. 10(a), when the core wire W1 of the electric wire W is inserted into the joint receiving hole 12 from the wire insertion port 13, due to the upper surface of the folded piece 34 of the joint 3 and the upper side of the joint receiving hole 12 The inner surface of the wall is roughly parallel and the distance between them is roughly the same as or slightly larger than the diameter of the core wire W1 , so the core wire W1 is inserted smoothly until it abuts against the inclined piece 35 .

(2) Then, when the core wire W1 of the electric wire W is pressed between the inner surface of the upper side wall of the joint receiving hole 12 and the inclined piece 35 and the abutting piece 36 of the joint 3, the inclined piece 35 and the abutting piece 36 of the joint 3 The sheet 36 is pressed and displaced downward to elastically deform the elastic contact piece 33 as shown in FIG. The substrate P is electrically connected through the connector 3 .

At this time, since the lateral width (for example, 1.2 mm) of the contact holding portion forming hole 37 is formed larger than the lateral width (for example, 0.8 mm) of the wire insertion opening 13 , the core wire W1 can be easily pressed in and workability can be improved.

In addition, when the electric wire W is inserted into the terminal receiving hole 12, the tip of the core wire W1 abuts against the stopper portion 39 to restrict the insertion, so that excessive insertion of the core wire W1 can be prevented.

Moreover, the front side edge of the window hole 17 is formed on the front side of the stopper 39, so it can be visually checked through the window hole 17 whether the core wire W1 of the inserted electric wire W is inserted into a predetermined position of the joint receiving hole 12 (such as the stopper part). 39), it is easy to check whether the wire W is inserted properly.

(3) When the connection of the electric wire W is released from the electric wire connection connector, as shown in FIG. The displacement releases the contact and holding of the core wire W1 by the contact holding portion 38 of the elastic contact piece 33 , so that the wire W can be pulled out from the connector receiving hole 12 .

At this time, the front end of the stopper 39 abuts against the supporting piece 31 to prevent excessive downward displacement of the abutting piece 36 , so that the elastic contact piece 33 is restrained from being subjected to an external force more than necessary to prevent fatigue.

In the aforementioned embodiments, the case where the core wire of the electric wire is a single wire, and the plug-in connection to the wire connection connector is performed by pressing the core wire is described, but the present invention is not limited thereto, and can also be used in the following cases: The core wire is a twisted wire, and the core wire is inserted between the inner surface of the upper side wall of the joint receiving hole and the contact holding part by pressing the abutting piece of the connector with a tool for releasing the connection; or the core wire of the electric wire is a single wire, The case where the core wire is inserted without press-fitting is canceled by pressing the abutting piece of the connector with a tool to expand the space between the inner surface of the upper side wall of the connector receiving hole and the contact holding portion.

In the aforementioned embodiment, in order to increase the degree of freedom in the design of the contact holding portion forming hole and the stopper portion, the case where the contact holding portion forming hole is formed using a U-shaped hole and a hole formed by cutting the tongue, but this The invention is not limited thereto, and can be used, for example, in a case where the formation of the U-shaped hole is omitted, the contact holding portion is formed by punching, and the punching piece left during punching is used as the stopper.

In the foregoing embodiments, the case where a stopper is provided to limit the displacement of the abutting piece in order to prevent excessive insertion of electric wires and prevent fatigue of the elastic contact piece is described, but the present invention is not limited thereto, and may also be used to omit the stopper Case.

In the foregoing embodiments, the case where the window hole and the tool insertion hole are formed continuously for easy formation of the window hole and the tool insertion hole has been described, but the present invention is not limited thereto, and may be used to separate the window hole and the tool insertion hole. And the situation formed separately.

In the above-mentioned embodiment, the case where the window hole is formed in the part corresponding to the upper side wall of the connector receiving hole of the casing in order to visually judge whether the core wire of the electric wire is contacted and held on the contact holding part of the connector is described. , but the present invention is not limited thereto, and can also be used in the case of omitting the window hole.

In the above-mentioned embodiment, in order to facilitate the operation of inserting the core wire of the electric wire into the terminal receiving hole to improve workability, the lateral width of the contact holding portion forming hole is formed larger than the lateral width of the electric wire insertion opening, However, the present invention is not limited thereto, and may be applied to a case where the lateral width of the contact holding portion forming hole is formed smaller than the lateral width of the wire insertion opening.

Claims (6)

1, a kind of connector for connecting wire is characterized in that, have at front surface to form that electric wire inserts mouthful (13) and be formed with in inside and insert the housing (1) of the joint accepting hole (12) that mouthful (13) be communicated with electric wire and to remain on joint (3) in the housing (1),

Joint (3) has: supporting slice (31) is bearing in the following side of the joint accepting hole (12) of housing (1); Elastic contact chip (33) inserts that mouthful (a 13) side is turned back and elastically deformable ground is provided in the joint accepting hole (12) from the electric wire of supporting slice (31), and with insert mouthful heart yearn (W1) Elastic Contact of the electric wire (W) of (13) insertion from electric wire;

Elastic contact chip (33), have: insert the sheet of turning back (34) that mouthful (13) side is provided with continuously with the electric wire of supporting slice (31), be provided with and be provided with continuously and be connected to the butt sheet (36) of the upper side wall inner surface of joint accepting hole (12) at the front end of the sheet of turning back (34) continuously with the oblique plate (35) that tilts to the approaching mode of the upper lateral part of the joint accepting hole (12) of housing (1), at the front end of oblique plate (35)

Striding across oblique plate (35) forms with butt sheet (36) and contact maintaining part formation hole (37), the ora terminalis that will contact electric wire insertion mouthful (13) side in maintaining part formation hole (37) is made as the contact maintaining part (38) that contacts and keep this heart yearn (W1) with the heart yearn (W1) of the electric wire that inserts (W), in the upper lateral part of the joint accepting hole (12) of housing (1) with the part of butt sheet (36) butt on, be formed for inserting and connect the tool insert hole of removing with instrument (5) (16).

2, connector for connecting wire as claimed in claim 1 is characterized in that: the contact maintaining part forms hole (37), form and overlook rectangular shape, and its transverse width forms to such an extent that insert the transverse width of mouthful (13) greater than electric wire.

3, connector for connecting wire as claimed in claim 1 or 2, it is characterized in that: in the upper lateral part of the joint accepting hole (12) of housing (1) with the part of butt sheet (36) butt on, being formed with can a visual fenestra that has or not (17) that inserts the heart yearn (W1) of the electric wire (W) that mouthful (13) inserts from electric wire.

4, connector for connecting wire as claimed in claim 3 is characterized in that: fenestra (17) forms continuously with tool insert hole (16).

5, as each described connector for connecting wire in the claim 1～4, it is characterized in that: on butt sheet (36), cut the part of butt sheet (36) and formed a retainer (39) with the front end butt of the heart yearn (W1) that inserts the electric wire (W) that mouthful (13) inserts from electric wire to downside.

6, connector for connecting wire as claimed in claim 5, it is characterized in that: the contact maintaining part forms hole (37) and is formed by following two kinds of holes: promptly, utilize the hole of the U font that stamping-out forms and cut the tongue piece that forms by this U font hole and the hole that forms to downside, and with the aforementioned tongue piece of having cut as retainer (39).

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