JP2019136988A - Cable with resin molded body - Google Patents

Abstract

To provide a cable with a resin molded body of high quality and high reliability.SOLUTION: A cable with a resin molded body includes: a cable 1 having insulated wires 3, 4 and a sheath 5 provided around the wires; an electronic component 30 connected to an end of the cable 1; and a resin molded body 8 covering the end of the cable 1 and the electronic component 30. The sheath 5 is made of a polyurethane composition having an antioxidant, and the polyurethane composition having an antioxidant has an elongation of 50% or more in a tensile test at 125°C after applying a heat load of at least 700 hours at 125°C. By using such a material for the sheath 5, a strength of a junction between the resin molded body 8 and the sheath (cable 1) 5 can be improved, and the sheath 5 can be prevented from cracking or breaking.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable having a resin molded body provided at an end portion.

  Today, various cables such as power cables and communication cables are used in various fields. One of these cables is a cable having an insulated wire as a core wire and a sheath provided around the insulated wire. This type of cable is used for in-vehicle sensors such as an ABS sensor, a torque sensor, and an index sensor. Moreover, the insulated wire used as a core wire of this type of cable has a conductor and an insulating layer provided around the conductor. Hereinafter, unless otherwise specified, the “cable” means a cable having an insulated wire as a core wire and a sheath provided around the insulated wire.

  When connecting an electronic component such as an in-vehicle sensor to the end portion of the cable, the connection portion and its periphery are covered and protected with resin. As such a cable terminal structure, there is known a structure in which an end of a sheath, an insulated wire protruding from the end of the sheath, and an electronic component electrically connected to the insulated wire are collectively covered with a resin. ing. In other words, a cable ("resin molding" provided with a resin molded body that collectively covers an end of the sheath, an insulated wire protruding from the end of the sheath, and an electronic component electrically connected to the insulated wire. It is known as a “body cable”.

JP 2007-95439 A

  The cable with a resin molded body as described above is mainly intended to ensure airtightness and waterproofness at the end of the cable. In particular, in-vehicle sensors are required to have high reliability, and the requirements for airtightness and waterproofness between the resin molded body and the cable are only increasing.

  However, when the present inventor examined, in the heat cycle test that was severer than before, some of the interfaces between the cable and the resin molded body were broken, and development of a cable with a resin molded body with higher heat shock resistance was developed. Is desired.

  An object of the present invention is to provide a highly reliable cable with a resin molded body having high heat shock resistance.

  The cable with a resin molded body of the present invention includes an insulated wire and a cable having a sheath provided around the insulated wire, an electronic component connected to an end of the cable, an end of the cable, and the electronic component And a resin molded body covering the surface. The sheath is made of a polyurethane composition having an antioxidant. And the said polyurethane composition which has the said antioxidant is 50% or more of elongation in the tension test at 125 degreeC after giving the heat load of 700 hours or more at 125 degreeC.

  ADVANTAGE OF THE INVENTION According to this invention, the heat shock tolerance of the cable with a resin molded object can be improved, and the cable with a resin molded object of higher quality and high reliability can be provided.

3 is a diagram illustrating a structure of a cable with a resin molded body according to Embodiment 1. FIG. It is sectional drawing which shows the structure of a cable. It is a figure which shows a tension test result. It is a figure which shows a FT-IR analysis result. It is a figure which shows a DSC measurement result. It is a figure which shows the structure of a polyurethane. It is a figure which shows typically the mechanism of deterioration of a polyurethane. It is a figure which shows the tension test result of an Example. It is a figure which shows the structure of a cable. It is a figure which shows the structure of a holder member. It is another figure which shows the structure of a holder member. It is another figure which shows the structure of a holder member. It is a figure which shows a resin molding.

(Embodiment 1)
Hereinafter, the cable with the resin molded body of Embodiment 1 will be described in detail with reference to the drawings. The cable with a resin molded body according to the present embodiment includes a cable, an electronic component connected to an end portion (cable end portion) of the cable, and a resin molded body that covers the cable end portion and the electronic component.

  FIG. 1 is a diagram illustrating a structure of a cable with a resin molded body according to the first embodiment. FIG. 2 is a cross-sectional view showing the structure of the cable.

  As shown in FIG. 2, the cable 1 includes a pair of insulated wires 3 and 4 and a sheath 5 that collectively covers the insulated wires 3 and 4. In other words, the cable 1 is a two-core cable having a pair of insulated wires 3 and 4 as core wires (see also FIG. 9).

  Each insulated wire 3, 4 has a conductor 6 and an insulating layer 7 provided around the conductor 6. The conductor 6 is a stranded wire in which a plurality of strands are gathered and stranded, and the insulating layer 7 is made of polyethylene. Although the kind of strand which forms the conductor 6 is not specifically limited, For example, an annealed copper wire, a hard copper wire, a tin plating annealed copper wire, a tin plating hard copper wire etc. can be used. The stranding method of the strand is not limited to collective twisting, and may be, for example, concentric twisting or composite twisting. Moreover, you may form the insulating layer 7 by resin materials other than polyethylene (ethylene-type resin composition).

  The sheath 5 is formed of polyurethane (a thermoplastic polyurethane composition, a solidified product of the thermoplastic polyurethane composition, a cured product), and collectively covers the insulated wires 3 and 4 arranged in parallel to each other. The sheath 5 holds the distance between the pair of insulated wires 3 and 4. Polyurethane (thermoplastic polyurethane composition) has an antioxidant. The polyurethane has an elongation in a tensile test at 125 ° C. of 50% or more after applying a heat load of at least 700 hours at 125 ° C.

  As the thermoplastic polyurethane, polyester-based polyurethane (adipate-based, caprolactone-based, polycarbonate-based) or polyether-based polyurethane can be used. In particular, polyether-based polyurethane is preferable from the viewpoint of resistance to heat and moisture.

  As shown in FIG. 1, the insulated wires 3 and 4 are exposed at at least one end of the cable 1. Specifically, the insulated wires 3 and 4 protrude from at least one end of the sheath 5, respectively.

A cable with a resin molded body shown in FIG. 1 includes the cable 1, insulated wires 3 and 4 projecting from the end of the sheath 5 of the cable 1, and electronic devices electrically connected to the insulated wires 3 and 4. The resin molded body 8 that covers the component (IC) 30 is provided. In FIG. 1, only the lower resin molded body 8 such as the electronic component (IC) 30 is shown, but the resin molded body 8 is formed so as to cover the upper side of the electronic component (IC) 30 or the like. (See also FIG. 13). The resin molded body 8 is formed of a resin material. This resin material is a resin material having a linear expansion coefficient different from that of at least polyurethane. Further, this resin material is a resin material having a linear expansion coefficient smaller than that of at least polyurethane. This resin material is, for example, polyamide (PA, nylon). Polyurethane has a linear expansion coefficient of 18 × 10 ⁻⁵ and polyamide has a linear expansion coefficient of 11 × 10 ⁻⁵ . As the resin material of the resin molded body 8, polyphthalamide, polyethylene terephthalate, or the like may be used.

  By adding an antioxidant to polyurethane (thermoplastic polyurethane composition), a decrease in polyurethane strength is suppressed even after a long-term heat cycle test, and the boundary between the sheath (polyurethane) and the resin molded body 8 is suppressed. It is possible to avoid cracking of the sheath.

  As the antioxidant added to the polyurethane (thermoplastic polyurethane composition), a phenol-based antioxidant or a sulfur-based antioxidant can be used. Moreover, as addition amount of antioxidant, it can be 0.4 weight part or more with respect to 100 weight part of polyurethane.

  As the phenolic antioxidant (radical scavenger), a hindered phenolic compound can be used. Specifically, benzenepropanoic acid, 3,5-bis (1,1-dimethylethyl) -4-hydroxy-isooctyl ester, pentaerythritol tetrakis 3- (3,5-di-tert-butyl-4-hydroxy Phenyl) propionate, thiodiethylenebis-3- (3,5-di-tert-butyl-4-hydroxyphenyl) propionate, and the like.

  A thioether compound can be used as the sulfur-based antioxidant (peroxide decomposer).

  The polyurethane (thermoplastic polyurethane composition) includes a processing aid, a flame retardant, a flame retardant aid, an ultraviolet absorber, a copper damage preventive agent, a lubricant, an inorganic filler, an adhesiveness imparting agent, if necessary. It is also possible to add additives such as stabilizers, carbon black, and colorants.

  The cable 1 according to the present embodiment can be obtained by extrusion-coating the thermoplastic polyurethane composition onto the pair of insulated wires 3 and 4. As the extrusion coating method, known methods can be used.

  Next, the manufacturing method of the cable with a resin molded body of this Embodiment is demonstrated, referring FIG. A cable with a resin molded body shown in FIG. 1 includes the cable 1, insulated wires 3 and 4 projecting from the end of the sheath 5 of the cable 1, and electronic devices electrically connected to the insulated wires 3 and 4. It has a component (IC) 30 and a resin molded body 8 that collectively covers these components.

  This cable with a resin molded body can be manufactured as follows, for example. The sheath 5 at the end of the cable 1 is cut to expose the ends of the insulated wires 3 and 4, and the insulating layer 7 at each end of the exposed insulated wires 3 and 4 is cut to remove the conductor 6. After the end portion is exposed, the conductor 6 is connected to the electrode terminal of the electronic component (IC) 30. The connecting portion, the electronic component (IC) 30 and the end of the insulating layer 7 are covered by injection molding of a mold resin. That is, a unit in which a cable and an electronic component are connected is set in a mold, and a resin material is supplied into the mold in which the unit is set, so that a resin molded body 8 is formed. Thereby, the cable with a resin molding can be obtained. The resin molded body 8 is welded (fused) to the sheath 5. As shown in the second embodiment, the cable and the electronic component are accommodated in the holder member, the cable and the holder member are set in the mold, the resin material is supplied into the mold, and the resin molding is performed. The body 8 may be formed.

  The electronic component (IC) 30 is an in-vehicle sensor such as an ABS sensor, a torque sensor, or an index sensor. Among these, the torque sensor is a magnetic sensor that outputs a signal corresponding to a change in the surrounding magnetic field, for example.

[Example]
Examples (including study examples) will be described below. The present invention is not limited to the following examples.

(Evaluation of sheath)
(Examination example)
A test piece was prepared using a sheath material to which no antioxidant was added. Specifically, using a thermoplastic polyurethane composition to which no antioxidant was added, a polyurethane piece was formed to obtain a test piece. The polyurethane piece used was a 1 mm thick sheet punched with a JIS No. 6 dumbbell.

  The test piece was left at 125 ° C. for 750 hours, and after applying a heat load, a tensile test was performed at −40 ° C., 23 ° C., and 125 ° C. In addition, the tension test was done at each set temperature also about the test piece which has not given the heat load.

  The tensile test is a test in which the test piece is pulled at a predetermined tensile speed until the test piece is broken or the elongation reaches a specified value, and the elongation applied to the test piece is measured during that time. The tensile speed was 200 mm / min.

  FIG. 3 shows the tensile test results. The vertical axis represents tensile strength (MPa), and the horizontal axis represents elongation (%). 3 (a) shows the results at −40 ° C., FIG. 3 (b) shows the results at 23 ° C., and FIG. 3 (c) shows the results at 125 ° C. Indicates the tensile strength of the test piece after applying a heat load.

  As shown in FIG. 3, at −40 ° C. and 23 ° C., a certain degree of elongation can be secured even after a heat load is applied, but at a high temperature of 125 ° C., the elongation is significantly reduced. ing. From this, it is considered that the sheath is cracked due to the distortion caused by vibration in a high temperature environment.

Moreover, FT-IR (Fourier Transform Infrared Spectroscopy) was investigated about the test piece which did not give the heat load, and the test piece after the heat load was given. FIG. 4 shows the results of FT-IR analysis. The vertical axis represents absorbance, and the horizontal axis represents wave number (cm ⁻¹ ). Graph a shows the case without heat load, and graph b shows the case with heat load. In graph a, the peak of associated C = O stretching (hydrogen bond) (1700 cm ⁻¹ ) is high and the peak of non-associated C═O stretching (1740 cm ⁻¹ ) is low, whereas in graph b, these differences are It is getting smaller. That is, the ratio of the peak (1700 cm ⁻¹ ) of the association C═O stretching (hydrogen bond) is small.

  Further, differential scanning calorimetry (DSC) was performed on the test piece not applied with the heat load and the test piece after the heat load was applied. FIG. 5 shows the DSC measurement results. The vertical axis represents heat flow (W / g), and the horizontal axis represents temperature (° C.). (A) shows the case without heat load, and (b) shows the case with heat load. In the case of (b) with a heat load, the melting point is lowered and the crystallinity is lowered.

  4 and 5 suggest that the thermal load reduces hydrogen bonding and crystallinity.

(Discussion)
From the above results, the characteristics of polyurethane after applying a thermal load will be considered as follows. FIG. 6 is a diagram showing a structure of polyurethane, and FIG. 7 is a diagram schematically showing a mechanism of deterioration of the polyurethane.

  Polyurethane is a polymer having a polyurethane bond (—NH—CO—O—). It is produced by polyaddition of a compound having an isocyanate group and a hydroxyl group. For example, as shown in FIG. 6A, it is produced by polymerization of diisocyanate and diol.

  Here, for example, a polyurethane using a short-chain diol and a long-chain diol (ether type) as a diol may be modeled as a polyurethane having a soft segment and a hard segment as shown in FIG. 6B. it can.

  In such a polyurethane (FIG. 6B), before applying a heat load, as shown in FIG. 7A, the polyurethane bond part of the hard segment is pseudo-crosslinked by a hydrogen bond to become a crystal part. This crystal part is connected by a soft segment (long chain) and maintains strength and elongation.

  On the other hand, after the heat load is applied, the polyurethane binding site and the soft segment (long chain) are cut, resulting in a decrease in crystallinity and a decrease in molecular weight. As a result, the motility of the crystal part is increased and the entanglement is easily loosened, so that the crystal becomes brittle, the binding force of the soft segment (long chain) is reduced, and the strength and elongation are reduced. Furthermore, at high temperatures, the crystallinity and molecular weight decrease, and polyurethane is deteriorated (aged) by heat load.

  Such deterioration starts from the fact that the polyurethane group is cleaved by the action of heat or light to generate active radicals. When this radical reacts with oxygen in the air, an auto-oxidation reaction involving peroxide occurs, resulting in a decrease in polyurethane crystallinity and molecular weight. Further, the deterioration further proceeds at a high temperature. Further, when the linear expansion coefficients of the cable sheath and the resin molding are different, stress is generated between them. For example, when the temperature rises to 125 ° C., since the linear expansion coefficient of polyurethane is large, stress concentrates on the polyurethane side at the interface (welded portion) between the resin molded body (polyamide) and the sheath (polyurethane). Moreover, when temperature falls, tensile stress will generate | occur | produce in the interface of a resin molding (polyamide) and a sheath (polyurethane). When such a heat cycle is repeated, deterioration of the polyurethane proceeds at a high temperature, and stress is applied to the interface between the resin molded body (polyamide) and the sheath (polyurethane) in the heat cycle. It is considered that cracking occurs in the sheath when strain due to vibration is applied in a state in which such deterioration and stress accumulation have progressed.

  From such consideration, an antioxidant is added to polyurethane (thermoplastic polyurethane composition) to suppress the generation of radicals and peroxides and to suppress the deterioration of polyurethane due to an auto-oxidation reaction.

(Example)
Polyurethane test pieces T1 to T4 were prepared at a blending ratio of thermoplastic polyurethane (TPU) and antioxidant shown in Table 1 below. That is, a thermoplastic polyurethane composition to which an antioxidant is added (a mixture of an antioxidant, a thermoplastic polyurethane, and other additives mixed in a dry state) is used to form a polyurethane piece. Electron beams were irradiated to obtain test pieces T1 to T4.

  Antioxidant A is a phenolic antioxidant. Antioxidant B is a sulfur-based antioxidant.

  A tensile test was performed in the same manner as in the above examination example. FIG. 8 shows the tensile test results of this example. FIG. 8 (a) shows that when test pieces T1 to T4 are left at 125 ° C. for 744 hours and a thermal load is applied and then a tensile test is performed at 125 ° C., FIG. This is the result when ˜T4 is left at 125 ° C. for 1000 hours, a thermal load is applied, and then a tensile test is performed at 125 ° C.

  As shown in FIG. 8 (a), the test pieces T1 to T4 have an elongation of 50% or more in any case, and compared to the case of FIG. The tensile strength of T4 could be improved.

  Moreover, even when a more severe heat load (125 ° C. × 1000 h) is applied, as shown in FIG. 8B, the test pieces T1 to T4 have an elongation of 50% or more in any case. The tensile strength of the test pieces T1 to T4 could be improved as compared with the case of FIG.

  In particular, for test piece T4 (added with 0.6 parts by weight or more of a sulfur-based antioxidant), an elongation of 150% or more can be secured in both cases of FIGS. 8 (a) and (b). It was found to have a high tensile strength. In addition, 150% elongation means that the length immediately before the break is 2.5 times the initial length.

  Thus, the polyurethane having the antioxidant (thermoplastic polyurethane composition) has an elongation in a tensile test at 125 ° C. of 50% or more after applying a heat load of at least 700 hours at 125 ° C., By using this as a material for the sheath of the cable, the strength of the joint between the resin molded body and the sheath (cable) can be improved even when incorporated in a cable with a resin molded body. And breakage can be avoided.

(Embodiment 2)
In the first embodiment, the unit in which the cable and the electronic component are connected is provided with the resin molding by injection molding. However, the cable end and the electronic component are accommodated in the holder member, and the holder member and the cable are connected to each other. It is good also as a structure which provides a resin molding on the outer periphery. FIG. 9 is a diagram showing the structure of the cable. Moreover, FIG. 10 is a figure which shows the structure of a holder member, and FIG. 11, FIG. 12 is another figure which shows the structure of a holder member. FIG. 13 is a view showing a resin molded body.

  As shown in FIG. 9, the cable 1 includes a pair of insulated wires 3 and 4 and a sheath 5 that collectively covers the insulated wires 3 and 4. As described above, each of the insulated wires 3 and 4 includes the conductor 6 and the insulating layer 7 provided around the conductor 6. The conductor 6 is a stranded wire in which a plurality of strands are gathered and stranded, and the insulating layer 7 is made of polyethylene. The types of the strands forming the conductor 6 are as described in the first embodiment.

  The sheath 5 is made of polyurethane and covers the insulated wires 3 and 4 arranged in parallel with each other. This sheath 5 is made of polyurethane (thermoplastic polyurethane composition) to which the antioxidant described in detail in Embodiment 1 (including examples) is added, and this polyurethane has a heat load of at least 700 hours at 125 ° C. The elongation in a tensile test at 125 ° C. after giving is 50% or more.

  As shown in FIG. 9, the insulated wires 3 and 4 protrude from at least one end portion 5 a of the sheath 5. Specifically, the insulated wires 3 and 4 protrude from at least one end surface 5b of the sheath 5, respectively.

  As shown in FIGS. 10 and 11, the end portion of the cable 1 and the electronic component 30 are accommodated in the lower holder member 10. The lower holder member 10 has a semi-cylindrical appearance as a whole, and the end portion of the cable 1 and the electronic component 30 are placed on the lower holder member 10. The lower holder member 10 includes a sheath accommodating portion 11 in which the sheath end portion 5 a is accommodated, a stage 12 on which the root portions 3 a and 4 a of the insulated wires 3 and 4 are placed, and a conductor 6 of each insulated wire 3 and 4. The conductor accommodating portions 13a and 13b in which the electronic component is accommodated and the electronic component accommodating portion 14 in which the electronic component 30 is accommodated are formed. The sheath housing part 11, the stage 12, the conductor housing parts 13 a and 13 b, and the electronic component housing part 14 are arranged in this order along the longitudinal direction of the lower holder member 10. The lower holder member 10 has an upper surface 17, a rear end surface 18 and a front end surface 19.

  The sheath accommodating portion 11 has a semicircular cross-sectional shape that can accommodate substantially the half (lower half) in the radial direction of the sheath end portion 5a. On the other hand, each conductor accommodating part 13a, 13b is a groove | channel of the rectangular cross section which can accommodate substantially all radial directions of each conductor 6. FIG. The two conductor housing portions 13 a and 13 b extend in parallel with each other along the longitudinal direction of the lower holder member 10. Between these two conductor accommodating parts 13a and 13b, the convex part 15 which prevents the contact of the conductors 6 accommodated individually in the respective conductor accommodating parts 13a and 13b is formed. The convex portion 15 has the same or substantially the same length as the conductor housing portions 13a and 13b, and extends in parallel with the conductor housing portions 13a and 13b.

  The stage 12 is a flat surface provided between the sheath accommodating portion 11 and the conductor accommodating portions 13a and 13b, and the base of the insulated wires 3 and 4 protruding from the sheath end portion 5a on the stage 12. Portions 3a and 4a are placed. Specifically, all or a part of the exposed portion of the insulated wires 3 and 4 protruding from the sheath end portion 5a and covered with the insulating layer 7 (FIG. 9) is placed on the stage 12. ing. That is, the covered portion covered with the insulating layer 7 (FIG. 9) among the exposed portions of the insulated wires 3 and 4 is placed on the stage 12. Of the exposed portions of the insulated wires 3 and 4, conductor portions not covered by the insulating layer 7 (FIG. 9) are accommodated in the conductor accommodating portions 13a and 13b. And the front-end | tip of the conductor 6 of each insulated wire 3 and 4 is connected to the electronic component 30 accommodated in the electronic component accommodating part 14 provided ahead of the conductor accommodating parts 13a and 13b. Note that the electronic component 30 in the present embodiment is a magnetic sensor that outputs a signal corresponding to a change in the surrounding magnetic field. In addition, a projecting portion 16 extending in a direction orthogonal to the same direction is integrally formed at a substantially longitudinal center of the lower holder member 10.

  Then, as shown in FIG. 12, the upper holder member 20 is abutted on the lower holder member 10 that houses the end of the cable 1 and the electronic component 30. The upper holder member 20 is disposed so as to cover the end portion of the cable 1 and the electronic component 30.

  As shown in FIG. 13, the resin molded body (cover member, outer) 8 covers the end of the cable 1 and the entire holder member (10, 20). The holder members (10, 20) are made of a resin material (for example, polyamide). The entire protrusion 16 of the holder member (10, 20) is also covered with a resin molded body (cover member) 8. Moreover, the flange part 41 provided with the through-hole 40 is formed by a part of the resin molded body (cover member) 8 covering the protruding part 16 of the holder member (10, 20). That is, the protrusion 16 of the holder member (10, 20) serves as a core material for the flange portion 41. When the resin molded body 8 (electronic component 30) is fixed at a desired mounting position, a bolt inserted through the through hole 40 provided in the flange portion 41 is screwed to a bolt hole provided in advance at the mounting position.

  In the resin molded body (cover member) 8, the holder member (10, 20, FIG. 12) in which the end of the cable 1 and the electronic component 30 are accommodated is set in the mold, and the holder member (10, 20) is set. Molding is performed by supplying a heat-melted resin material (polyamide composition) into the mold. The sheath 5 is made of the aforementioned polyurethane. For this reason, when the resin material heated and melted is supplied into the mold in which the holder member (10, 20) is set, the holder member (10, 20) in contact with the supplied resin material and the surface layer of the sheath end 5a Part dissolves. As a result, the interface between the holder member (10, 20) and the resin molded body (cover member) 8 and the interface between the sheath end portion 5a and the resin molded body (cover member) 8 are welded, and airtightness and waterproofness are achieved. Secured. That is, the interface between the holder member (10, 20) or the sheath end portion 5a and the resin molded body (cover member) 8 is welded due to heat generated when the molded resin body (cover member) 8 is molded. Waterproofness is ensured.

  Furthermore, in the present embodiment, as described above, the sheath material is a polyurethane having an antioxidant (thermoplastic polyurethane composition), and after applying a heat load at 125 ° C. for 700 hours or more, By using a material with an elongation in a tensile test at 125 ° C. of 50% or more, the strength of the joint between the resin molded body and the sheath (cable) can be improved even when incorporated in a cable with a resin molded body. It is possible to improve and avoid cracking and breaking of the sheath. That is, as described in detail in the first embodiment (including examples), a high quality, high reliability cable with a resin molded body having high heat shock resistance can be obtained.

  The present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, the cable 1 is not limited to a two-core cable, and may be a single-core cable or a cable with three or more cores. The insulating layer 7 of the insulated wires 3 and 4 can also be formed of an insulating resin other than polyethylene, for example, polybutylene terephthalate (PBT). Moreover, you may use resin materials other than polyamide about the holder member (10, 20). Moreover, there is no restriction | limiting in the electronic component 30, A various electronic component can be used according to the use of the cable with a resin molding.

1 Cable 3, 4 Insulated wire 3a, 4a Root part 5 Sheath 5a End of sheath (sheath end)
5b End face 6 Conductor 7 Insulating layer 8 Resin molded body 10 Lower holder member (holder member)
DESCRIPTION OF SYMBOLS 11 Sheath accommodating part 12 Stages 13a and 13b Conductor accommodating part 14 Electronic component accommodating part 15 Convex part 16 Protruding part 17 Upper surface 18 Rear end surface 19 Front end surface 20 Upper holder member (holder member)
30 Electronic component 40 Through-hole 41 Flange part T1-T4 Test piece

Claims (8)

A cable having an insulated wire and a sheath provided around the insulated wire;
An electronic component connected to the end of the cable;
A resin molded body covering the end of the cable and the electronic component;
The sheath is made of a polyurethane composition having an antioxidant,
The polyurethane composition having the antioxidant is a cable with a resin molded body, wherein an elongation in a tensile test at 125 ° C. is 50% or more after applying a heat load at 125 ° C. for 700 hours or more. In the cable with a resin molded body according to claim 1,
The resin molded body is a cable with a resin molded body, the linear expansion coefficient of which is different from that of the polyurethane composition having the antioxidant. In the cable with a resin molded body according to claim 2,
The resin molded body is a cable with a resin molded body, which has a smaller linear expansion coefficient than the polyurethane composition having the antioxidant. In the cable with a resin molded body according to claim 3,
The resin molded body is a cable with a resin molded body, made of a polyamide composition. In the cable with a resin molded body according to claim 1,
The said antioxidant is a cable with a resin molded object which is a phenolic antioxidant or a sulfur type antioxidant. In the cable with a resin molded body according to claim 5,
The said antioxidant is a cable with a resin molding which is 0.4 weight part or more with respect to 100 weight part of polyurethane. In the cable with a resin molded body according to claim 6,
The said antioxidant is a sulfur type antioxidant, and is a cable with a resin molding which is 0.6 weight part or more with respect to 100 weight part of polyurethane. In the cable with a resin molded body according to any one of claims 1 to 7,
The electronic component is a cable with a resin molded body, which is a magnetic sensor that outputs a signal corresponding to a change in a surrounding magnetic field.