JP2011204399A - Pressure contact terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure contact terminal that can pressure-weld electric wires at constant pressure even if the diameters of the electric wires differ.SOLUTION: The pressure contact terminal 1 includes a pressure contact part 11 having a slot 111 for pressure-welding the electric wires 3, and a terminal part 12 formed extending from the pressure contact part. The slot includes a plurality of pairs of wall parts 13, 14, 15 sequentially provided from the opening end side to the bottom side and formed so that the opening width of the slot is narrowed stepwise in the above sequence. The respective wall parts excluding support extended parts are chamfered. In such a pressure contact terminal, the electric wires with different diameters are brought into pressure contact with the corresponding wall parts and supported by the support extended parts and the bottom of the slot. The electric wires can thereby be pressure-welded at constant pressure even if the diameters of the electric wires differ, and core wires are not damaged by the slot during pressure-welding or the like.

Description

  The present invention relates to a press contact terminal capable of press-contacting electric wires of various diameters. More specifically, the present invention relates to a press contact terminal that can be pressed with a constant pressure even if the diameters of the electric wires are different.

2. Description of the Related Art Conventionally, there has been known a press-contact terminal that can be pressed by inserting a covered electric wire or the like into a substantially U-shaped slot to break the electric wire covering. Such a press-contact terminal needs to prepare a slot having an opening width corresponding to the thickness of the electric wire, and therefore, cannot select and press-fit a plurality of thicknesses of electric wires.
Further, as a pressure contact terminal capable of arbitrarily selecting and welding a plurality of thickness electric wires, for example, a pressure contact terminal provided with a plurality of slots having different widths in the axial direction of the wire has been proposed (see Patent Document 1). .) If such a press contact terminal is a thin wire, it can be press-contacted using a corresponding narrow slot. Furthermore, if the electric wire has a large diameter, it is possible to expand the narrow slot and press-contact with the corresponding wide slot.
Moreover, in order to fix one or more electric wires having a plurality of thicknesses, a clamp has been proposed in which the electric wires are sandwiched by flexible wall bodies provided at intervals in the depth direction of the slots (Patent Literature). 2). Such a clamp can be clamped by clamping the electric wire between opposing wall bodies or between upper and lower wall bodies.

Japanese Patent Laid-Open No. 11-273761 Japanese Utility Model Publication No. 63-179717

However, in the press-contact terminal as shown in Patent Document 1, when a wire having a large diameter is press-contacted, a slot portion for sandwiching the wire having a small diameter expands, so that a part of the corresponding wall portion of the press-contact terminal swells. There is a problem of deformation. In addition, when crimping a wire with a large diameter, the slot for holding the wire with a small diameter is expanded by applying a force exceeding the pressure at the time of the crimping by the wire, so that the wire is easily damaged at this portion. There is.
Furthermore, although the clamp as shown in Patent Document 2 can hold electric wires of various diameters, it is not considered that the electric conductivity is kept constant by contacting the electric wire conductor with an appropriate pressure. Moreover, it is not considered to remove the coating of the electric wire.
This invention is made | formed in view of the said present condition, and it aims at providing the press-contact terminal which can be press-contacted by fixed pressure, even if the diameter of an electric wire differs.

The present invention is as follows.
1. In a press contact terminal comprising a press contact portion having a slot for press-contacting an electric wire and a terminal portion formed by extending from the press contact portion, the slot is sequentially provided from the open end side to the bottom side, and A press contact terminal comprising a plurality of pairs of wall portions formed so that the opening width of the slot is gradually reduced in the above order.
2. Each of the wall portions is provided with a concave support extending portion for supporting an electric wire to be pressure-welded on the opening side upper portion of the wall portion next to the wall portion. The indicated pressure contact terminal.
3. 2. The tip end side of the support extension portion is formed to be sharp toward the opening end portion side. The indicated pressure contact terminal.
4). Each of the wall portions excluding the support extension portion is chamfered. Or 3. The indicated pressure contact terminal.

According to the press contact terminal of the present invention, since the press contact part does not spread outward when the press contact terminal is used by press-contacting the wires of several thicknesses at the corresponding wall portions, the connector housing, etc. There is no hindrance to the size, and pressure welding can be performed so as to be appropriate even if the pressure of the pressure welding is different in diameter. Further, the core wire is not damaged by the slot at the time of pressure welding or the like.
When the support extension is formed, the pressed wire is supported by the support extension, so the wire is forcibly pushed deeper into the slot at the time of pressure welding and use, so that It is possible to prevent the state from becoming inappropriate or the core of the electric wire from being damaged.
If the tip of the support extension is formed to be sharp, the opening of the upper wall is wide, so the tip of the support extension is Since the coating is pierced and peeled off, an appropriate pressure contact can be made without the coating remaining.
When each wall part excluding the support extension part is chamfered, the wall part becomes sharper, the coating can be easily broken, and the width of the support extension part is increased to make the electric wire It can be supported more reliably.

It is sectional drawing which shows the state which has arrange | positioned the press-contact terminal which concerns on a present Example in the housing of a connector. It is a model perspective view of the press-contact terminal which concerns on a present Example. It is a top view of the press-contact terminal which concerns on a present Example. It is a front view of the press-contact terminal which concerns on a present Example. It is the elements on larger scale for demonstrating in detail the support extension part of a press-contact terminal.

Hereinafter, the press contact terminal of the present invention will be described in detail with reference to FIGS.
The items shown here are for illustrative purposes and exemplary embodiments of the present invention, and are the most effective and easy-to-understand explanations of the principles and conceptual features of the present invention. It is stated for the purpose of providing what seems to be. In this respect, it is not intended to illustrate the structural details of the present invention beyond what is necessary for a fundamental understanding of the present invention. It will be clear to those skilled in the art how it is actually implemented.

The press contact terminal according to the present invention is a terminal disposed in a connector housing or the like for electrically connecting the connector or the like and the electric wire by press contact, a press contact portion having a slot for press-contacting the electric wire, and a press contact And a terminal portion formed by extending from the portion. Further, the slot is provided with a plurality of pairs of wall portions that are sequentially provided from the opening end side to the bottom side thereof, and formed so that the opening width of the slot is gradually reduced in the above order. To do.
The material and shape of the press contact part and the terminal part are the same as those of the conventional press contact terminal and can be arbitrarily selected. Further, the terminal portion may be extended from the pressure contact portion on the base side of the slot in the depth direction of the slot, or may be extended from the wall side of the slot.

Further, the “wall portion” of each pair is “provided sequentially from the opening end side to the bottom side, and the opening width of the slot is gradually reduced in the above order”. As illustrated in FIG. 1, the side wall of the slot 111 is divided into an arbitrary number of 2 or more in the depth direction, and an opening width W that is an interval between a pair of opposed side walls that are divided is an opening end. It means that the portion side 111a becomes shorter from the bottom side 111b in this order. In this way, by forming the wall portions 13, 14, 15 and the like of the slot 111 so that the opening width W is gradually reduced, the core wire having a diameter substantially the same as the opening width W can be Since it can be pressed in a state where it is supported by the “support extension” that is the upper end of the step wall (for example, the wall 14 if it is pressed by the wall 13), the electric wire is forced into the slot deeper. Therefore, it is possible to prevent the pressure contact state from becoming inappropriate and the core of the electric wire from being damaged.
Further, in order to change the opening width, the side wall of the slot may be protruded stepwise from the opening end side to the bottom side, both sides of the slot side wall may be protruded, or only one side. May be projected.

The above-mentioned “support extension part” is formed by pressing a core wire having substantially the same diameter as the opening width of the corresponding wall part into the back side of the slot having a narrower opening width. It is a support which supports so that it may deform | transform so that it may spread and a core wire may not be damaged.
Such a support extension part should just be able to support the core part of an electric wire, for example, can be formed in linear form or curved form. Moreover, it can be set as a concave curved surface. For example, as shown in FIGS. 4 and 5, the concave shape is such that the upper surfaces of the wall portions 14, 15 on the back side of the wall portions 13, 14 that press-contact the wires 3 a, 3 b are curved in a concave shape. The surfaces 131 and 141 may suffice, may be curved surfaces so as to be in close contact with the surface of the electric wire, or may have a gap between the electric wires as illustrated in FIG.
Furthermore, the tip of the support extension portion can be formed to be sharp toward the opening end portion side 111a as shown by the tips 132 and 142 of the support extension portions 131 and 141 in FIG. 5, for example. As a result, when the electric wire is pushed into the deeper wall portion (wall portion 14 in the support extension portion 131), the tip 132 is stuck into the electric wire covering, whereby the covering can be more easily peeled off.

  The above “chamfering” is for making the contact surface of the wall portion (contact surfaces 133, 143, 153 illustrated in FIG. 2) sharp in order to make it easy to break the coating of the electric wire. An arbitrary amount can be selected according to the ease of contact, the contact area with the electric wire, and the like. Moreover, it is preferable to remove a support extension part, without chamfering all the wall parts. This is because the electric wire can be supported in a wider range.

Hereinafter, the present invention will be specifically described with reference to the drawings.
As shown in FIG. 1, two or more crimp terminals 1 according to the present embodiment are arranged in a connector housing 2, and are crimp terminals that can press-contact one type of electric wire 3 among three types of diameters. As shown in FIGS. 1 and 2, a press contact portion 11 having a slot 111 for press-contacting the electric wire 3, and a terminal portion 12 formed to extend downward from the base side of the press contact portion 11, It has. As shown in FIGS. 2 and 4, the wall surface of the slot 111 is divided into three pairs of wall portions 13, 14, and 15. The wall portion 13 on the opening end side 111 a to the wall portion 15 on the bottom side 111 b. The opening widths W are formed so as to become narrower in the order of the opening widths W1, W2, and W3 shown in FIG. Furthermore, the opening widths W1, W2, and W3 can be arbitrarily selected. In this embodiment, the opening widths W1, W2, and W3 in the wall portions 13, 14, and 15 are sequentially 0.6 mm, 0.5 mm, and 0.4 mm. It is said. Thereby, three types of electric wires 3a, 3b, and 3c having core diameters of 0.6 mm, 0.5 mm, and 0.4 mm can be pressed.

As shown in FIGS. 2, 4 and 5, support extending portions 131 and 141 curved in a concave shape are formed on the upper side of the wall portions 14 and 15. Furthermore, as shown in FIG. 5, the tips 132 and 142 of the support extending portions 131 and 141 are directed toward the opening end side 111a, and are sharp so that the covering of the electric wires 3b and 3c can be easily peeled off.
Further, the walls 13, 14, and 15 are chamfered except for the support extension portions 131 and 141, and as shown in FIG. 3, the width of the contact surfaces 133, 143, and 153 where the wall and the electric wire come into contact with each other. Da is shorter than the thickness Db of the press contact part 11.

As shown in FIG. 2, such a press contact terminal 1 presses any one of the electric wires 3 a, 3 b, 3 c having different diameters with the wall portions 13, 14, 15, and conducts with the contact surfaces 133, 143, 153. can do.
For example, when the electric wire 3a is inserted into the slot 111 of the press contact terminal 1, the covering of the electric wire 3a is broken by the wall portion 13, and the surface of the core wire is exposed. Moreover, since the opening width W2 of the wall part 14 is shorter than the diameter of a core wire, the core wire of the electric wire 3a contacts the support extension part 131 of the wall part 14 upper part, and insertion into the slot 111 beyond it is stopped. At this time, the surface of the core wire of the electric wire 3a comes into contact with the contact surface 133, and conducts in a pressed state.

  Further, when the electric wire 3b is inserted into the slot 111 of the press contact terminal 1, the covering of the electric wire 3b is broken by the wall portion 14, and the surface of the core wire is exposed. At this time, first, the tip 132 of the support extension 131 bites into the covering of the electric wire 3b and breaks as it is. Further, since the opening width W3 of the wall portion 15 is shorter than the diameter of the core wire, the core wire of the electric wire 3b comes into contact with the support extension portion 141 at the upper portion of the wall portion 15, and further insertion into the slot 111 is stopped. And the surface of the core wire of the electric wire 3b contacts with the contact surface 143, and it conduct | electrically_connects in the state press-contacted.

  Further, when the electric wire 3c is inserted into the slot 111 of the press contact terminal 1, the covering of the electric wire 3c is broken by the wall portion 15, and the surface of the core wire is exposed. At this time, first, the tip 142 of the support extension 141 bites into the coating of the electric wire 3c and breaks as it is. Further, the core wire of the electric wire 3b can be inserted until it comes into contact with the bottom of the slot 111, and its surface comes into contact with the contact surface 153 and conducts in a pressed state.

As described above, the electric wires 3 a, 3 b, and 3 c having different diameters are in pressure contact with the wall portions 13, 14, and 15, respectively, and supported by the support extension portions 131 and 141 and the bottom portion of the slot 111. For this reason, even if the diameters of the electric wires are different, they can be pressed with a constant pressure, and the core wires of the electric wires are not damaged by the slots 111 during the pressing.
Further, even if the thickness of the press contact terminal 1 (Db in FIG. 2) is increased and the width of the support extension portions 131 and 141 (Da in FIG. 2) is increased, the walls 13, 14, and 15 are chamfered. Therefore, the covering of the electric wires 3a, 3b, and 3c can be easily broken. For this reason, the electric wires 3a, 3b, and 3c can be reliably pressed against each other, and the electric wires 3a and 3b can be more reliably supported by the wide support extending portions 131 and 141.

  In the present invention, the present invention is not limited to the above-described embodiment, and various modifications can be made within the scope of the present invention depending on the purpose and application. That is, in the above embodiment, the number of wall pairs is 3 in the embodiment, but it is not particularly limited as long as it is 2 or more. Further, in the embodiment, as shown in FIG. 1, one wire 3 having the same diameter is press-contacted to each press-contact terminal 1 one by one. However, the present invention is not limited to this. May be.

  DESCRIPTION OF SYMBOLS 1; Crimp terminal, 11; Press-contact part, 111; Slot, 12; Terminal part, 13, 14, 15; Wall part, 131, 141; Support extension part, 132, 142; .

Claims (4)

In a press contact terminal comprising a press contact portion having a slot for press-contacting an electric wire, and a terminal portion formed by extending from the press contact portion,
The slot is provided with a plurality of pairs of wall portions that are sequentially provided from the opening end side to the bottom side thereof, and are formed so that the opening width of the slot is gradually reduced in the order. Press contact terminal.   2. The press contact terminal according to claim 1, wherein each of the wall portions is formed with a concave support extending portion for supporting an electric wire to be press contacted at an upper portion on the opening side of the wall portion next to the wall portion. .   The press contact terminal according to claim 2, wherein a tip end side of the support extension portion is formed to be sharp toward the opening end portion side.   The press contact terminal according to claim 2 or 3, wherein each of the wall portions excluding the support extension portion is chamfered.

Images