CN2379935Y - Electric wire/cable composite having strain-relieving mechanism - Google Patents

Abstract

The utility model relates to a cable combination with a stress relief mechanism, which comprises a cable, a tail end connector, a stress relief mechanism, etc., wherein, the stress relief mechanism is coated at the outer side of the cable and comprises a connecting part and a stress relief part, the stress relief part is composed of end parts, wing parts and wall parts, and the connecting part forms stable connection with the tail end connector through positioning pins. The wall parts of the stress relief part are provided with a plurality of thin plate-shaped structures which are coated at the outer side of the cable and are mutually parallel. The wing parts then are vertical to each wall part and are arranged at both sides of the cable, and the thickness of the joint points of the wing parts and the cable is far smaller than the thickness of the cross section of the cable, and the cross section of each of the wing parts forms a trapezoid shape.

Description

Cable combination with strain relief mechanism

The relevant a kind of cable combination with strain relief mechanism of the utility model refers in particular to a kind of cable that can make and obtains good location in the forming process of strain relief mechanism, make the finished product symmetrical configuration to promote the cable combination of production yield.

No. the 80210763rd, 83201276, prior art relevant such as Taiwan patent and United States Patent (USP) the 5th, 494,457,5 with this case, 267, No. 882 and design patent the 349th, 100,349, case such as No. 099, it has disclosed the cable of the strain relief mechanism of several tool different shapes.For improve to make efficient and simplify processing procedure, adopt of industry directly inserted cable in the mould tool and ejection formation and obtain the practice of these strain relief mechanisms thereon more at present, the tensile strength the when cable that is connected with end connector with increase is combined in and uses.Usually, the suffered pulling force size of sight line cable, be subjected to factors such as force direction and intensity needs, and can be set to various mesh shape and different relative length by these strain relief mechanisms.

Less but for the combination of stressed bigger cable for volume, as shown in Figure 1, its strain relief mechanism 7 has No. the 80210763rd, similar Taiwan patent and United States Patent (USP) the 349th, the stress that No. 100 grades are disclosed is eliminated structure, these strain relief mechanisms 7 are made up of two lengthwises alar part 8 that extends and the wall portion 9 that several are set up in parallel perpendicular to the cable trend, when the ejection formation strain relief mechanism, the intersection of the wall portion 9 in alar part 8 and centre position promptly is located in its position of penetrating cast gate, and, the thickness of these alar part 8 predetermined ejection formations and the radial dimension close (as shown in Figure 3) of cable 6, its alar part cross section is slightly rectangular.In forming process, when cable 6 is inserted in the mould, because emitted alar part 8 its thickness and cable radial dimension is roughly the same, and penetrate cast gate and just be located on this alar part 8, make melten gel inject in the mould by cable 6 one sides, therefore penetrating under the bigger situation of pressure, the melten gel that high pressure flows into will not wait being folded in the cable 6 one sides generation impacting with high pressure in the mould and forming cable 6 pressure at both sides, this moment, mould there is no the mechanism of suitable location cable, again cable 6 opposite sides in order to the approaching situation of the radial dimension of the die cavity space of shaping alar part 8 and cable 6 under, cable 6 is easy to be extruded distortion with regard to the influence that is subjected to the melten gel impacting with high pressure, causes its towards between alar part 8 die cavitys of opposite side crooked (as shown in Figure 2).Like this, behind the melten gel curing molding that penetrates, the part configuration that this strain relief mechanism 7 is distributed in cable 6 both sides has uneven phenomenon (shown in Figure 3), the width that is distributed in the alar part 8 of cable 6 both sides does not wait, so not only directly cause the bad problem of product appearance, and asymmetric, interrupted configuration will influence the effect that stress eliminates and reach, and shorten the useful life of this strain relief mechanism 7.

The purpose of this utility model is to provide a kind of cable accurate positioning, stress is eliminated the cable strain relief mechanism of the good and symmetrical configuration of effect, this cable strain relief mechanism can the mating die tool configuration and obtain its suitable support, and then accurately locate and remain on the center line of design, make the plastic cement size symmetry that takes shape in the cable both sides and can not produce inner prestressing force, avoid cable in forming process because of being penetrated the phenomenon that pressure influence produces crooked off normal, so not only improve product appearance, and prolonged its useful life.

The utility model is by the following technical solutions to achieve the above object: this cable combination with strain relief mechanism comprises structures such as cable, end connector and strain relief mechanism, wherein strain relief mechanism is to be coated on the cable outside via ejection formation, it comprises connecting portion and stress elimination portion, this stress elimination portion is made up of end, alar part and wall portion, and connecting portion protrudes out certain-length forward from this end, and be symmetrically distributed in cable shafts to both sides, firmly be connected and can constitute with end connector by alignment pin.In addition, the wall portion of this stress elimination portion is several lamellar structures that is coated on the cable outside and is parallel to each other, alar part then perpendicular to each wall portion to be arranged at the cable both sides, itself and perpendicular to the setting of cable axis direction with constitute each wall portion between interconnect, wherein, the thickness at this alar part and cable engagement place will be much smaller than the thickness of cable cross section, and promptly the alar part cross section slightly is trapezoidal.

Compared with prior art, advantage of the present utility model is: the symmetrical configuration after this strain relief mechanism and the cable engagement and can not produce inner prestressing force, can improve the production yield of its product simultaneously.

The utility model is described in further detail below in conjunction with accompanying drawing and preferred embodiment.

Fig. 1 is that existing cable strain relief mechanism is connected to the three-dimensional combination figure on the cable.

Fig. 2 is that existing cable strain relief mechanism is connected on the cable and the vertical view that is shaped under the situation of cable generation off normal bending.

Fig. 3 is the cutaway view of Fig. 2 along A-A line direction.

Fig. 4 is that the cable that the utlity model has strain relief mechanism makes up the stereogram that local structure is analysed and observe.

Fig. 5 is the vertical view that the utlity model has the cable combination of strain relief mechanism.

Fig. 6 is the cutaway view of Fig. 5 along B-B line direction.

Please refer to shown in Figure 4, the cable combination 1 that the utlity model has strain relief mechanism includes parts such as cable 2, end connector 3 and strain relief mechanism 4, wherein cable 2 is round flat usually, its cross section roughly is ellipticity, and this cable 2 has and is coated on outer insulation-coated 20 and accommodate several wires 21 in it.The end of cable 2 and end connector 3 are electrical connected, further to link to each other with butt joint electronic installation (not shown) and to reach the effect of telecommunication conduction.And strain relief mechanism 4 is to obtain via ejection formation in the position of cable 2 near end connector 3, and cable 2 is connected near the position formation coating of end connector 3.This strain relief mechanism 4 comprises connecting portion 41 and stress elimination portion 40, wherein stress elimination portion 40 has the alar part 403 that the side that is arranged at the bigger end of cable 2 cross section curvature and cable 2 axis directions along the line extend certain-length, and the axis direction of several vertical cables 2 and be the wall portion 402 that parallel shape is provided with mutually, this wall portion 402 is surrounded on all side surfaces of cable 2, and one-body molded with alar part 403.This stress elimination portion 40 further is provided with end 401 in cable 2 position that links to each other with end connector 3, and it can rely on the lateral surface of end connector 3, with matching connector 41 stress elimination portion 40 and end connector 3 is fixed together.In addition, connecting portion 41 from the end 401 one extend certain-length and suitably be contained in the inside of end connector 3 according to its configuration, which is provided with a pair of location hole 411, can borrow alignment pin 412 firmly to be connected, so that the affixed strength of 3 of strain relief mechanism 4 and end connectors to be provided with end connector 3.

See also shown in Figure 6 again, this alar part 403 is symmetrically distributed on the long axis direction of oval cross section of cable 2, itself and cable 2 insulation-coated 20 connect the thickness of part much smaller than the minor axis length of cable oval cross section, as shown in the figure, the whole height of the abutment portion of alar part 403 and cable 2 has differed height Δ h, and, for keeping the requirement of strength of whole strain relief mechanism 4, the tranverse sectional thickness of this alar part 403 increases gradually from inside to outside and forms an inclined-plane, and makes its shape of cross section be approximately one trapezoidal.In response to the design of this alar part 403 configurations, ejection shaping die die cavity (not shown) will corresponding design have projection on the long axis direction of the oval cross section of cable 2, and the notch size of die cavity that causes mould holder wiring cable 2 is much smaller than the length of cable 2 minor axises.Like this, be folded in when desiring thereon ejection formation strain relief mechanisms 4 in the mould at cable 2, this cable will and not be subject to any external force effect bending by the die cavity of mould chucking location and move in the alar part 403 pairing mould die cavitys.When the melt plastic cement is injected mould by the moulding cast gate of being located at alar part 403 and wall portion 402 intersections, owing to being subjected to the mould support, cable keeps the location, therefore do not have by the high pressure melten gel and dash curved phenomenon, thereby the alar part 403 of cable 2 both sides can be remained on all claim proper state (Fig. 5 with reference to), to improve the phenomenon of molding effect inequality in the existing cable strain relief mechanism, so not only make the outward appearance of the utility model cable combination 1 preferable, and make the effect of strain relief mechanism 4 can better reach and can prolong the useful life of this cable combination 1.

Claims (6)

1. cable combination with strain relief mechanism, it comprises cable, cable ends connector and strain relief mechanism, wherein cable and cable ends connector be electrically conducted mutually with dock that electronic installation constitute to electrically connect and the transmission telecommunication, and strain relief mechanism is coated on the position of the cable outside near the cable ends connector via ejection formation, comprise connecting portion and stress elimination portion with cable ends connector Joint, this stress elimination portion comprises some perpendicular to cable axis direction and the wall portion that is arranged in parallel, the alar part of cable both sides is extended and be arranged in vertical each wall portion, and be arranged at stress elimination portion foremost with connector and end connector contacted end respectively, it is characterized in that: it is cross-sectional that this alar part engages the position with cable is length less than the arbitrary footpath of cable cross section length direction to thickness.

2. the cable combination with strain relief mechanism according to claim 1 is characterized in that: described alar part is cross-sectional to be increased to last edge from the position that itself and cable join gradually to thickness, and makes its cross section slightly be trapezoidal.

3. the cable combination with strain relief mechanism according to claim 1, it is characterized in that: described connecting portion is the platy structure that vertically extends certain-length from the end of stress elimination portion, offers at least one location hole on it.

4. the cable combination with strain relief mechanism according to claim 3, it is characterized in that: described connecting portion is arranged at cable ends connector inside, and matches with the location hole of connecting portion so that this strain relief mechanism group fixed bit by the alignment pin of end connector inside.

5. the cable combination with strain relief mechanism according to claim 1, it is characterized in that: the end of described strain relief mechanism is connected portion and is fixed on the side of end connector.

6. the cable combination with strain relief mechanism according to claim 1, it is characterized in that: described strain relief mechanism and cable engagement are one.

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