JP3823538B2 - connector - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connector provided with a cover for holding a covered electric wire.
[0002]
[Prior art]
An example of this type of connector is shown in FIG. This is composed of a connector housing a in which a terminal fitting (not shown) is housed and a cover b attached to the connector housing a, and the covered electric wire c pressed against the terminal fitting is provided inside the connector housing a. In addition to being bent, the rear end surface of the connector (the surface shown in FIG. 4) is led out from between the connector housing a and the cover b. In this lead-out portion, the covered electric wire c is held in a bent state by being sandwiched between the connector housing a and the cover b, and thus the covered electric wire c is held in a bent state, thereby providing the covered electric wire. The tensile force acting on c does not reach the pressure contact portion with the terminal fitting.
[0003]
[Problems to be solved by the invention]
In the holding part of the covered electric wire c in the connector housing a and the cover b, arc-shaped concave portions d and e are formed in the connector housing a and the cover b, respectively, and the covered electric wire c is fitted into the concave portions d and e. Thus, it is held in a predetermined position.
However, if the covered wire c is not correctly placed in the recess d on the connector housing a side when the cover b is assembled, when the cover b is assembled, the covered wire c is located on the side portions f and g of the recesses d and e. Although the distance between the side portions f and g is extremely narrow compared to the outer diameter of the covered electric wire c, the covered electric wire c may be excessively crushed.
As a countermeasure against this, it is conceivable to provide holding portions at regular intervals by making the opposing surfaces of the connector housing a and the cover b into a flat parallel surface over the entire width region. However, when it does in this way, there exists a problem that the covered electric wire c becomes easy to float in the width direction.
The present invention has been made in view of the above circumstances, and aims to hold a covered electric wire without excessively crushing it and restricting looseness.
[0004]
[Means for Solving the Problems]
The invention of claim 1 is provided with a cavity capable of accommodating a terminal fitting having a press-contact portion that is cut into the covered electric wire and comes into contact with the core wire portion, and the corresponding portion of the press-contact portion in this cavity is in the pushing direction of the covered electric wire A connector housing having an opening to be opened, and a cover that is attachable to the connector housing so as to be able to close the opening and has a pressing piece for forcibly holding the covered electric wire in a bent state. It is a connector, The upper surface facing the said press piece part in the said connector housing is located in the right-and-left both sides of the electric wire receiving groove which can insert the said covered electric wire, and was dented in circular arc shape A horizontal flat receiving portion is formed, and the left and right side edges of the wire receiving groove are substantially angular opening edges, and the substantially angular opening edge The wire receiving groove and the flat receiving portion are connected to each other, and the end surface of the pressing piece facing the connector housing is bulged in an arc shape. And a pressing protrusion that can be pressed against the covered electric wire and a flat pressing portion that is parallel to the flat receiving portion and that is positioned on both the left and right sides of the pressing protrusion. In addition, the boundary between the pressing protrusion and the flat pressing portion is a concave portion, and there is a space for sandwiching the covered electric wire between the entire width of the tip surface of the pressing piece and the opposing surface of the connector housing. Formed, this space is composed of a wire holding space and a preliminary space communicating adjacent to the wire holding space, the wire holding space is formed by the pressing protrusion and the wire receiving groove , The preliminary space The wire holding space and is set to be substantially the same height, wherein the flat-shaped receiving portion is constituted by a flat pressing portion, said covered wire in the preliminary space with the flat receiving portion flat In the state of being sandwiched between the wire-shaped pressing portions, the generally angular opening edge of the wire receiving groove presses the covered wire against the concave portion, thereby restricting movement of the covered wire in the width direction. It is set as the structure which is adapted.
[0005]
According to a second aspect of the present invention, in the first aspect of the present invention, the preliminary space is provided on both sides of the electric wire holding space.
[0006]
[Action and effect of the invention]
[Invention of Claim 1]
As a space for holding the covered electric wire between the connector housing and the cover, a spare space of substantially the same height is provided in addition to the electric wire holding space. Even if it slips out, the covered electric wire is not excessively crushed. When the covered electric wire is held in the electric wire holding space, the covered electric wire is accommodated in the electric wire receiving groove and thus does not move in the width direction. Since the opening edge of the groove presses against the covered electric wire, also in this case, the loose movement in the width direction of the covered electric wire is restricted.
[0007]
[Invention of claim 2]
Since the preliminary space is provided on both sides of the electric wire holding space, excessive crushing of the covered electric wire and loose movement in the width direction can be avoided even when the covered electric wire is shifted to the left or right of the electric wire holding space.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[Embodiment 1]
A first embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
The connector of this embodiment includes a connector housing 10, a cover 20, a terminal fitting 30, and a covered electric wire 35.
The connector housing 10 has a plurality of cavities 11 therein, and each cavity 11 is opened at both front and rear end faces (left and right end faces in FIG. 2) of the connector housing 10. Further, an opening 12 communicating with the cavity 11 is formed in a substantially second half region on the upper surface of the connector housing 10.
In addition, a wire receiving groove 13 is formed in the rear end portion (right end portion in FIG. 2) of the connector housing 10 by lowering the bottom surface of the cavity 11 in a stepped manner. The wire receiving groove 13 is individually provided in a form continuous to the rear end of each cavity 11 and is opened on the rear end surface of the connector housing 10. When the electric wire receiving groove 13 is viewed from the rear, it has an arc shape having substantially the same curvature as the outer periphery of the covered electric wire 35. Further, flat receiving portions 14 are formed on both the left and right sides of the wire receiving groove 13. The dimension in the width direction of the flat receiving portion 14 is set smaller than the outer diameter of the covered electric wire 35. The connecting portion between the flat receiving portion 14 and the wire receiving groove 13, that is, the opening edge 13A of the wire receiving groove 13, is formed to be relatively square. The wire receiving groove 13 and the flat receiving portions 14 on both sides thereof constitute an opposing surface 15 to the pressing piece portion 23 in the present invention. In addition, on both the left and right ends of this facing surface 15 (outer ends of the flat receiving portion 14), restriction wall portions 16 for restricting the displacement in the width direction of the covered electric wire 35 are projected upward.
[0009]
The cover 20 is assembled to the connector housing 10 from above so as to cover the opening 12 of the cavity 11 on the upper surface thereof, and is assembled by engaging the locking piece 21 of the cover 20 with the receiving projection 17 of the connector housing 10. Locked to state. On the lower surface of the cover 20 (the surface facing the connector housing 10), a pressure contact protrusion 22 is formed to restrict the looseness of the covered wire 35 after the covered wire 35 is pressed against the pressure contact portion 33 as will be described later. ing.
[0010]
A pressing piece 23 that protrudes downward is formed at the rear edge of the cover 20. A plurality of the pressing piece portions 23 are provided so as to individually correspond to the respective wire receiving grooves 13, and the width of each pressing piece portion 23 is a dimension that fits tightly between the regulation wall portions 16 of the connector housing 10. Is set to A pressing protrusion 24 that bulges downward in an arc shape is formed at the center in the width direction of the lower surface of the pressing piece 23 (the surface facing the wire receiving groove 13). Flat pressing parts 25 are formed on both sides.
[0011]
The arc of the pressing projection 24 and the arc of the wire receiving groove 13 are set to have the same curvature, and the center of the arc of the pressing projection 24 and the center of the arc of the wire receiving groove 13 are at the same position in the width direction. Is set to Therefore, in the state where the cover 20 is assembled to the connector housing 10, the vertical distance between the pressing projection 24 and the wire receiving groove 13 is a constant dimension L in the width direction. The dimension L is set smaller than the outer diameter of the covered electric wire 35. And between this press protrusion 24 and the electric wire receiving groove 13, the electric wire holding space Sa for hold | maintaining the covered electric wire 35 in the clamped state is comprised.
[0012]
Further, in the state in which the cover 20 is assembled, the flat pressing portion 25 is parallel to the flat receiving portion 14, and therefore the vertical distance between the flat pressing portion 25 and the flat receiving portion 14 is constant in the width direction. Become. The interval between the flat pressing portion 25 and the flat receiving portion 14 is set to the same dimension L as the interval S between the pressing protrusion 24 and the wire receiving groove 13. A preliminary space Sb for holding the covered electric wire 35 in a sandwiched state is formed between the flat pressing portion 25 and the flat receiving portion 14. The space Sb is adjacent to the left and right sides of the wire holding space Sa.
The covered electric wire is covered over the entire width region between the pressing piece portion 23 and the facing surface 15 of the connector housing 10 (between the regulating wall portions 16) by the electric wire holding space Sa and the preliminary spaces Sb on both sides thereof. A space S that can hold 35 is formed (see FIG. 3).
[0013]
Each cavity 11 houses a terminal fitting 30. The terminal fitting 30 has a shape in which a pair of front and rear pressure contact portions 33 are formed by raising a side wall portion 32 from the left and right side edges of the bottom plate portion 31 extending from the front end to the rear end thereof and by raising a part of the bottom plate portion 31. Has been. The pair of press contact portions 33 are arranged so as to correspond to the opening 12 on the upper surface side of the cavity 11, and the covered electric wire 35 is press contacted to the press contact portion 33.
[0014]
The covered electric wire 35 is obtained by applying an insulating resin coating 37 to the outer periphery of a conductive core wire 36. The covered electric wire 35 is placed on the upper end of the pressure contact portion 33 from the opening 12 on the upper surface side of each cavity 11, and is pressed down by a pressure welding jig (not shown) in this state, so that the covered electric wire 35 is pressed against the pressure contact portion. 33 is pressed. The pressure contact portion 33 has a slit (not shown) extending downward from its upper edge, and both side edges of the slit are pressure contact blades (not shown). In the process of pressure contact, the resin coating 37 is incised by the pressure contact blade, and the terminal contact 30 and the covered electric wire 35 can be conducted by contacting the pressure contact blade and the core wire 36.
[0015]
Now, in the state where the covered wire 35 is pressed against the terminal fitting 30 while the cover 20 is assembled to the connector housing 10 as described above, the covered wire 35 is connected to the pressing piece 23 of the cover 20 at the rear end portion of the connector housing 10. By being pressed from above, it is routed in a path extending from the rear end of the cavity 11 to the wire receiving groove 13 while being bent in an S shape. Then, the covered electric wire 35 routed along the bent path is led backward (rightward in FIG. 2) from the wire receiving groove 13 to the outside of the connector housing 10.
In this way, in a state where the covered electric wire 35 is forcibly bent and wired, even if an axial tensile force acts on the lead-out portion of the covered electric wire 35, the bent portion of the covered electric wire 35 is not pressed. It catches on the lower end edge of 23 and the front end edge of the electric wire receiving groove | channel 13, and tensile force is received in the catching part. As a result, the tensile force is prevented from reaching the pressure contact portion 33 between the covered electric wire 35 and the terminal fitting 30, and a normal pressure contact state can be maintained.
[0016]
Now, as described above, as a form in which the covered electric wire 35 is sandwiched between the pressing piece portion 23 and the connector housing 10, the covered electric wire 35 is normally fitted into the electric wire receiving groove 13 and pressed in the electric wire holding space Sa. It will be in the state pressed down by the protrusion 24 (it shows on the left side of FIG. 3). In this state, the covered electric wire 35 is only slightly elastically crushed in the vertical direction between the pressing protrusion 24 and the electric wire receiving groove 13 and is not excessively crushed and deformed. Further, since the covered electric wire 35 is fitted in the arc-shaped electric wire receiving groove 13, there is no possibility of floating in the width direction.
[0017]
On the other hand, when the cover 20 is assembled in a state where the covered electric wire 35 is displaced laterally from the electric wire receiving groove 13, the covered electric wire 35 is detached from the center of the electric wire holding space Sa and is flat in the preliminary space Sb. Between the flat pressing portion 25 and the flat receiving portion 14 (shown on the right side of FIG. 3). Since the vertical dimension L of the preliminary space Sb is the same as that of the electric wire holding space Sa, the covered electric wire 35 is not excessively crushed.
Further, since the dimension in the width direction of the preliminary space Sb is set smaller than the outer diameter of the covered electric wire 35, the covered electric wire 35 has one side portion (right side in FIG. 3) as a regulating wall portion. In a state of being close to or in contact with 16, the opposite side portion protrudes into the electric wire holding space Sa. Then, the substantially angular opening edge 13A of the wire receiving groove 13 slightly bites into the lower portion of the covered electric wire 35, whereby the covered electric wire 35 is pressed upward, and the upper portion thereof is flat with the pressing protrusion 24. It is pressed so as to fit into the concave portion between the pressing portion 25 and the loosening of the covered electric wire 35 in the width direction is restricted.
[0018]
As described above, in the present embodiment, as the space S for sandwiching the covered electric wire 35, in addition to the electric wire holding space Sa, the preliminary space Sb having the same interval as the electric wire holding space Sa is provided. Even if the position is displaced in the width direction, the covered electric wire 35 is prevented from being excessively crushed.
Further, in the state of being sandwiched by the electric wire holding space Sa, the covered electric wire 35 is fitted into the arcuate electric wire receiving groove 13 so that the movement in the width direction is restricted, and in the preliminary space Sb, the electric wire receiving device The opening edge 13 </ b> A of the groove 13 presses the covered electric wire 35 and fits between the pressing protrusion 24 and the flat pressing portion 25, so that the movement in the width direction is restricted.
Furthermore, since the preliminary space Sb is provided on both the left and right sides of the electric wire holding space Sa, even if the covered electric wire 35 is shifted to the left or right of the electric wire holding space Sa, excessive crushing of the covered electric wire 35 and the width direction are performed. Can be prevented from moving.
[0019]
[Other Embodiments]
The present invention is not limited to the embodiment described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.
(1) In the above embodiment, the wire receiving groove and the pressing protrusion are arc-shaped. However, according to the present invention, an irregular shape other than an arc such as a square or a triangle may be used.
(2) In the above embodiment, the preliminary spaces are provided on both sides of the electric wire holding space. However, according to the present invention, the preliminary spaces may be provided only on either the left or right side of the electric wire holding space.
[Brief description of the drawings]
1 is a rear view of Embodiment 1. FIG. 2 is a cross-sectional view of Embodiment 1. FIG. 3 is a partially enlarged rear view of Embodiment 1. FIG. 4 is a rear view of a conventional example.
DESCRIPTION OF SYMBOLS 10 ... Connector housing 11 ... Cavity 12 ... Opening part 13 ... Electric wire receiving groove 13A ... Opening edge 20 of electric wire receiving groove ... Cover 23 ... Pressing piece part 24 ... Pressing protrusion 30 ... Terminal metal fitting 33 ... Pressure contact part 35 ... Coated electric wire S ... Space Sa ... Wire holding space Sb ... Preliminary space

Claims (2)

A cavity capable of accommodating a terminal fitting having a pressure contact portion that cuts into the covered electric wire and contacts the core wire portion, and an opening portion corresponding to the pressure contact portion of the cavity opens in the pushing direction of the covered electric wire. A connector housing, and a connector provided with a cover formed with a pressing piece for forcibly holding the covered electric wire in a bent state, the connector housing being attachable so as to be able to close the opening,
On the upper surface of the connector housing that faces the pressing piece portion, the covered electric wire can be fitted, and the electric wire receiving groove that is recessed in an arc shape, and a horizontal flat shape that is located on both the left and right sides of the electric wire receiving groove A receiving portion is formed, and both right and left side edges of the wire receiving groove are substantially square opening edges, and the wire receiving groove and the flat receiving portion are connected via the substantially square opening edge. In the form
The front end surface of the pressing piece portion that faces the connector housing has a pressing protrusion that is arranged to correspond to the wire receiving groove in a form that bulges in an arc shape and can press the covered electric wire, A flat pressing portion that is parallel to the flat receiving portion and located on both the left and right sides of the pressing protrusion is formed, and a boundary between the pressing protrusion and the flat pressing portion is a concave portion. And
A space for sandwiching the covered electric wire is formed between the entire width of the front end surface of the pressing piece and the opposing surface of the connector housing,
This space is composed of an electric wire holding space and a preliminary space communicating adjacent to the electric wire holding space,
The electric wire holding space is formed by the pressing protrusion and the electric wire receiving groove ,
The preliminary space is set at substantially the same height as the electric wire holding space, and includes the flat receiving portion and the flat pressing portion ,
In the state where the covered electric wire is sandwiched between the flat receiving portion and the flat pressing portion in the preliminary space, the substantially angular opening edge of the electric wire receiving groove makes the covered electric wire the concave portion. The connector is characterized in that movement in the width direction of the covered electric wire is restricted by pressing the wire to the wire.   The connector according to claim 1, wherein the preliminary space is provided on both sides of the electric wire holding space.

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