JPH0945399A - Connecting structure of housing and cable and connecting method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain sufficient airtightness and durability only by bringing a housing and a cable into close contact with each other simultaneously with injection molding of the housing without using a special part. SOLUTION: A cross-linked body of a resin composition mainly composed of flameproofed thermoplastic polyester elastomer is applied as a sheath material of a cable 6, and a housing 3 is formed by melting molding of PBT resin, and a part between the housing 3 and the cable 6 is airtightly sealed. Since the sheath material of the cable 6 composed of a resin composition mainly composed of this thermoplastic polyester elastomer is adhered to this housing 3, sufficient airtightness between the housing 3 and the cable 6 can be obtained, and necessary waterproof performance can be realized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is applied to a wheel speed sensor for detecting the rotation speed of a wheel of an automobile, for example.
The present invention relates to a connecting structure and a connecting method of a housing that seals the wheel speed sensor and a housing that is connected to the wheel speed sensor and that hermetically seals between the cables led out from the housing.

[0002]

2. Description of the Related Art As a wheel speed sensor of this type, an electromagnetic pickup system as shown in FIG. 1 is known. This type of wheel speed sensor 1 is accompanied by a magnetic rotor 2 that rotates with the wheel.
Detects the change in the magnetic field according to the rotation of the magnetic rotor 2. The wheel speed sensor 1 has a structure in which the outside is covered with a housing 3 and the yoke 4 is inserted into the center of the electromagnetic coil 5 inside the housing 3. The change in the magnetic field is sensed by the yoke 4, converted into an electric signal by the electromagnetic coil 5, and the electric signal is output to the outside via the cable 6.

Since such a wheel speed sensor 1 is exposed to an environment where it is exposed to water or icing while the vehicle is running, the connecting portion between the housing 3 and the cable 6 has sufficient durability and waterproofness. Required.

Therefore, the material of the housing 3 is polybutylene terephthalate (PB) which is advantageous in terms of toughness and the like.
T) A resin or the like is selected, and a polyurethane resin that is advantageous in terms of wear resistance, bending resistance, etc. is selected for the sheath material of the cable 6.

Further, in order to improve the waterproof property of the connecting portion between the housing 3 and the cable 6, the housing 3 is formed by injection molding of PBT resin, and at the same time, the housing 3 is formed.
And the cable 6 are closely attached. Of course, the two insulated wires 6a and 6b of the cable 6 are connected to the respective terminals 5a of the electromagnetic coil 5 in the pre-process of injection molding.

However, according to this method, the airtightness at the interface between the injection-molded housing 3 and the sheath material of the cable 6 is insufficient, and the desired waterproofness cannot be obtained.

In order to solve this problem, for example, as shown in FIG. 2, a method is used in which a rubber O-ring 7 is fitted on the outer circumference of a cable 6 and then PBT resin is injection-molded.

However, in this method, the O-ring 7 is P
There is a problem that the BT resin moves from a predetermined position due to the molding pressure during injection molding, or the O-ring deteriorates due to the heat during injection molding, resulting in a decrease in impact resilience and a predetermined waterproofness. There was a problem that I could not get it. Alternatively, PBT
Before the resin injection molding, the O-ring 7 is attached to the outer circumference of the cable 6.
Since it requires a process of mounting the parts, not only the number of parts but also the number of processes is increased, and the productivity is reduced.

Further, as shown in FIG. 3, a seal member 8 is arranged on the outer periphery of the cable 6 by molding, and then P
A method of injection molding a BT resin has also been proposed. In this method, a polyurethane resin similar to the sheath material of the cable 6 is applied as the material of the seal member 8 to enhance the adhesion between the seal member 8 and the sheath material and to secure the airtightness with the sheath material. At the interface between the seal member 8 and the housing 3, a plurality of ribs are formed around the seal member 8 to increase the contact area and mechanically ensure hermetic sealing.

However, also in the case of this method, the productivity is lowered due to an increase in the number of parts and the number of steps.

[0011]

As described above, the conventional O
Although the airtightness between the housing 3 and the cable 6 is enhanced by using the ring 7 and the seal member 8, the O-ring is deteriorated, and the predetermined waterproofness cannot be obtained, or the number of parts and the number of steps are increased. As a result, productivity declined.

Therefore, an object of the present invention is to obtain sufficient airtightness and durability between the housing and the cable only by bringing them into close contact with each other in accordance with the injection molding of the housing without using special parts. It is in.

[0013]

In order to solve the above problems, in the housing and cable connection structure of the present invention, a resin composition mainly composed of flame retarded thermoplastic polyester elastomer is used as a sheath material of the cable. Is applied.

The crosslinked body of the resin composition mainly composed of the thermoplastic polyester elastomer has not only the various properties such as abrasion resistance and bending resistance required for the sheath material of the cable, but also the resin composition. By applying a cross-linked product, sufficient sealing can be achieved between the housing and the cable only by bringing the housing and the cable into close contact when the housing is melt-molded, and the required waterproof performance can be realized.

The flame retardation of the crosslinked product of this resin composition can be achieved by using a flame retardant other than polybromodiphenyl ether, for example.

The flame retardant is, for example, one kind or a mixture of plural kinds selected from the group consisting of ethylenebisbrominated phthalimide, bis (brominated phenyl) ethane and bis (brominated phenyl) terephthalamide.

The thermoplastic polyester elastomer is a crystalline hard segment such as polybutylene terephthalate (PBT) resin and an amorphous soft segment composed of polyoxymethylene glycol such as polytetramethylene ether glycol, or polycaprolactone glycol. And a non-crystalline soft segment composed of polyester glycol.
Among these copolymers, thermoplastic polyester elastomers in which the amorphous soft segment is made of polyoxymethylene glycol are commercially available because of their high flexibility, and can be said to be suitable as a sheath material for cables.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

Here, the connection structure and the connection method of the present invention are applied to the housing 3 and the cable 6 of the wheel speed sensor 1 shown in FIG. 1, and this is one embodiment. That is, as a sheath material of the cable 6, a cross-linked body of a resin composition mainly composed of flame-retarded thermoplastic polyester elastomer is applied, and the housing 3 is formed by fusion molding of PBT resin, and the housing 3 and the cable are 6 are closely attached.

The thermoplastic polyester elastomer is a block copolymer having a crystalline hard segment as described above and an amorphous soft segment, and the amorphous soft segment is polyoxymethylene glycol. Suitable for cable sheath material.

Since the sheath material of the cable 6 made of the resin composition mainly composed of such a thermoplastic polyester elastomer is adhered to the housing 3 during the melt molding of the housing 3, a sufficient space between the housing 3 and the cable 6 is obtained. Airtightness can be obtained and required waterproof performance can be realized.

Now, the cables used in automobiles include
Properties such as flame resistance, heat resistance, and wear resistance are required.
Specific required characteristics are described in JASO (Japan Automobile Federation) Standard D608, JIS C3404, C3005. For example, a cable sample is installed horizontally, a burner flame is applied for 10 seconds, and the flame is removed for 30 seconds. It is required to extinguish the fire within.

On the other hand, typical thermoplastic polyester elastomers are flammable. Therefore, in this embodiment, the flammable thermoplastic polyester elastomer is made flame-retardant. As a method of making this flame retardant, ethylene bis brominated phthalimide, bis (brominated phenyl) is added to this flammable thermoplastic polyester elastomer.
It is known that organic flame retardants such as ethane, bis (brominated phenyl) terephthalamide and perchloropentacyclodecane, and inorganic flame retardants such as antimony trioxide, aluminum hydroxide and magnesium hydroxide are blended in the required amounts. Has been. By making the thermoplastic polyester elastomer flame-retardant by this method, the flame-retardant property of the sheath material of the cable can be realized.

Next, a general thermoplastic polyester elastomer has a melting point of 100 ° C to 220 ° C. On the other hand, the molding temperature of PBT resin is 240 ° C to 260 ° C.
It is. Therefore, at the injection molding temperature of the housing 3, the thermoplastic polyester elastomer having this melting point (100 ° C. to 220 ° C.) melts.

Therefore, in this embodiment, the melting point (1
It is made infusible by cross-linking the thermoplastic polyester elastomer (00 ° C to 220 ° C). Specifically, with respect to the thermoplastic polyester elastomer having this melting point (100 ° C to 220 ° C), a carbon-carbon double bond is formed in the molecule of trimethylolpropane trimethacrylate, triallyl cyanurate, triallyl isocyanurate, or the like. A polyfunctional monomer having a plurality of is mixed and irradiated with ionizing radiation such as accelerated electron beam or gamma ray to crosslink the thermoplastic polyester elastomer to make it infusible. This thermoplastic polyester elastomer with an increased melting point is
Even if the molding temperature of the BT resin is 240 ° C. to 260 ° C., it does not melt and maintains its shape.

As another method for crosslinking the thermoplastic polyester elastomer, a thermal vulcanization method using an organic peroxide, or an alkoxysilane is preliminarily grafted to the thermoplastic polyester elastomer, which is then treated with an organotin compound or the like. There is a so-called silane cross-linking method, etc., in which, in the presence of a catalyst, water or steam is brought into contact to cross-link.

Although any of these methods may be used, the method using irradiation of ionizing radiation adopted in this embodiment is advantageous from the viewpoint of the crosslinking treatment rate, and it is simple and the production is high.

By the way, the flame retardant to be blended with the thermoplastic polyester elastomer has been described above, but among various flame retardants, some are not preferable. For example,
When polybromodiphenyl ether such as decabromodiphenyl ether or octabromodiphenyl ether is applied, even if the housing 3 and the cable 6 are sealed at the same time as the housing 3 is melt-molded, they are not sufficiently adhered to each other, which is necessary. Waterproof performance is not obtained.

Further, as the degree of cross-linking of the resin composition mainly composed of the thermoplastic polyester elastomer is increased, the drip of the resin composition at the time of combustion (dripping of combustion melt) is reduced, thereby improving flame retardancy. There is an advantage of doing.

However, when the above-mentioned decabromodiphenyl ether or polybromodiphenyl ether such as octabromodiphenyl ether is used as the flame retardant, if the degree of crosslinking of the resin composition is increased until the drip at the time of combustion is eliminated, the adhesiveness becomes extremely high. Therefore, it is more preferable to use a flame retardant excluding polybromodiphenyl ether, since the deterioration of waterproof performance becomes severe.

On the other hand, as in this embodiment, ethylene bis brominated phthalimide, bis (brominated phenyl)
When ethane, bis (brominated phenyl) terephthalamide, or the like is applied, even if the degree of crosslinking of the resin composition is increased, the adhesiveness is hardly reduced and the waterproof performance is not deteriorated.

That is, the difference in superiority or inferiority of the adhesiveness depending on the kind of the flame retardant becomes more significant as the degree of crosslinking of the resin composition is increased, and in order to increase the degree of crosslinking of the resin composition without deteriorating the adhesiveness. It is preferable to appropriately specify the type of flame retardant material.

As described above, in the embodiment, as the sheath material of the cable 6, a cross-linked body of a resin composition mainly composed of a thermoplastic polyester elastomer is applied, and the flame retardant is mixed in the resin composition. As this flame retardant, ethylene bis brominated phthalimide, bis (brominated phenyl)
Simply select organic flame retardants such as ethane, bis (brominated phenyl) terephthalamide, perchloropentacyclodecane, antimony trioxide, aluminum hydroxide, magnesium hydroxide, etc. to improve flame retardancy. At the time of melt-molding the housing 3, the cable 6 should be sufficiently adhered to the housing 3 and
This enables a sufficient airtight seal between the cable 6 and the cable 6.

In this embodiment, the wheel speed sensor is shown as an example, but the present invention is not limited to this, and a housing for sealing the main body device and a housing connected to the main body device are used.
The present invention can be applied as long as the cable is provided so as to extend through the housing.

[0035]

EXAMPLE Next, the first embodiment of the cable 6 shown in FIG.
The fourth embodiment will be described below.

In each of these examples and each of the comparative examples described later, each insulated wire 6 serving as the core of the cable 6 is used.
The outer circumferences of a and 6b were covered with an intermediate layer and then covered with a sheath material. This intermediate layer facilitates peeling of the sheath material from the cable 3, and has a melt index (190 ° C., load 2160 g) of 0.2.
The above-mentioned thermoplastic resins are preferable, and here, the ethylene-vinyl acetate copolymer of melt index 5 was applied.
This thermoplastic resin having a melt index of 0.2 or more,
It enables the co-extrusion described later with the resin composition which becomes the sheath material.

In the first embodiment, first, the polyester elastomers shown in Table 1 and the flame retardant ethylene bis (tetrabromophthalimide) are mixed by a pressure type kneader device, and the mixture is put into a feeder ruder. Pellet.

However, in each of the first to fourth examples and each of the comparative examples described later, 15 parts by weight of antimony trioxide and 1 part by weight of a diphenylamine antioxidant were used in addition to the compounding compositions shown in Table 1. Parts, 5 parts by weight of trimethylolpropane trimethacrylate are blended.

Next, the insulated wires 6a, 6b of the cable 6
(Product name Irax B8; Copper alloy conductor 3/20 / 0.0
8, insulation outer diameter 1.7φ, made by Sumitomo Electric Industries, Ltd. 35
These insulated wires 6a, 6b are twisted together at a mm pitch.
On the outer periphery of the melt extruder (40 mmφ, L / D = 24)
To form an intermediate layer of a resin composition mainly composed of an ethylene-vinyl acetate copolymer (vinyl acetate content 20 wt%, melt index 5), and its outer diameter is set to 4.0 mmφ. Further, a mixture composed of each of the blended compositions shown in Table 1 was coextruded by a melt extruder (60 mmφ, L / D = 24) to form a sheath material covering the intermediate layer, and the outer diameter thereof was set to 5.0 mmφ. . Then, the sheath material is irradiated with an electron beam having an acceleration voltage of 2 MeV at 250 kGy.

[0040]

[Table 1]

The flame resistance of the cable 6 thus manufactured is
As a result of examination according to the method described in ASO D608,
The burning time was 2 seconds, and melting and dropping of the sheath material due to burning was not observed at all, and it was confirmed that the flame retardancy was excellent.

The sheath material and the intermediate layer at one end of the cable 6 are stripped off, the insulator at the tip of each insulated electric wire 6a, 6b is stripped off, and these insulated electric wires 6a, 6b are electromagnetically welded to the wheel speed sensor 1 by resistance welding. After connecting to each terminal 5a of the coil 5, the main body of the wheel speed sensor 1 and the cable 6 are placed in a molding die, and a PBT resin (product name PBT5101G-
30U; manufactured by Toray Industries, Inc. was injection molded at 255 ° C. to form the housing 3.

The waterproofness of this wheel speed sensor 1 was evaluated by the following method. First, the wheel speed sensor 1 is put in a constant temperature bath of 105 ° C. for 30 minutes, and then the wheel speed sensor 1 is immersed in a water tank 11 storing water at room temperature for 20 minutes as shown in FIG. A thermal shock is applied to the wheel speed sensor 1, after which the insulation resistance between the wheel speed sensor 1 and the electrode plate 13 is measured by the insulation resistance meter 12, and this resistance value is recorded as the initial value.

Subsequently, the heat cycle of being placed in a constant temperature bath for 30 minutes and then immersed in the water bath 11 storing water at room temperature for 20 minutes was repeated 300 times, after which insulation between the wheel speed sensor 1 and the electrode plate 13 was performed. The resistance was measured and the resistance value was recorded.

As a result, both the initial resistance value and the resistance value after 300 heat cycles showed 100 GΩ or more. Therefore, it can be said that the wheel speed sensor 1 of the first embodiment has sufficient waterproof performance.

Next, in the second embodiment, similarly to the first embodiment, an intermediate layer of a resin composition mainly composed of an ethylene vinyl acetate copolymer is provided on the outer circumference of each of the insulated wires 6a and 6b of the cable 6. A sheath material made of a mixture of polyester elastomers formed by applying ethylene bis (pentabromobenzene) to the flame retardant shown in Table 1 was formed, and the sheath material was irradiated with an electron beam.

As with the first embodiment, the cable 6 was tested for flame retardancy in accordance with the method described in JASO D608. As a result, the burning time was 2 seconds, and the sheath material melted during burning. No falling was observed at all, and it was confirmed that the flame retardancy was excellent.

The cable 6 was connected to the wheel speed sensor 1 and PBT resin was injection-molded to form the housing 3. Also, regarding this wheel speed sensor 1, the first
When the waterproof property was evaluated by the same procedure as in the example, both the initial resistance value and the resistance value after 300 heat cycles showed 100 GΩ or more, and sufficient waterproof performance was obtained.

Further, in the third embodiment, as shown in Table 1, bis (tribromophenyl) terephthalamide is applied as the flame retardant, and the cable 6 is used as in the first embodiment.
An intermediate layer is formed on the outer circumference of each of the insulated wires 6a and 6b, and a sheath material of a mixture formed by mixing polyester elastomer and a flame retardant bis (tribromophenyl) terephthalamide is formed. The line was irradiated.

The flame retardancy of this cable 6 was also examined. As a result, the burning time was 3 seconds, and no melting and dropping of the sheath material due to burning was observed.

After connecting the cable 6 to the wheel speed sensor 1, PBT resin was injection-molded to form the housing 3. When the waterproofness of the wheel speed sensor 1 was evaluated, both the initial resistance value and the resistance value after 300 heat cycles showed 100 GΩ or more.

In the fourth embodiment, decabromodiphenyl ether is used as the flame retardant material for the sheath material, and a cable having the same structure as that of the first to third embodiments is manufactured to obtain an acceleration voltage of 2 Me.
The electron beam of V was irradiated at 100 kGy.

The flame retardancy of this cable is JASO D60.
As a result of examination according to the method described in 8, the burning time was 18
It was as long as 2 seconds, and the fall of the combustion melt due to combustion was also recognized, and it was found that the flame retardance of the cable was inferior to the cables of the first to third examples.

Using this cable, the housing of the sensor portion was molded and the cable was integrally molded by injection molding of PBT resin.

When the waterproofness of this molded article was evaluated, the initial value of the insulation resistance was 100 GΩ or more, indicating excellent waterproofness, and the insulation resistance after 100 heat cycles was 1 as well.
It was found that the initial value was not lower than 00 GΩ or more, but the insulation resistance after 300 heat cycles was 10 k.
It was found that the resistance was lower than Ω and the waterproof property was inferior to that of the first to third examples.

Next, in order to clarify the excellence of the first to fourth examples, first to fourth comparative examples will be shown.

[0057]

[Table 2]

First, in the first comparative example, decabromodiphenyl ether was used as the flame retardant, and the cable 6
An intermediate layer was formed on the outer peripheries of the insulated wires 6a and 6b, and a sheath material of a mixture obtained by mixing polyester elastomer and decabromodiphenyl ether as a flame retardant was formed, and the sheath material was irradiated with an electron beam. However, the irradiation amount of this electron beam was increased to 250 kGy. Thereby, the degree of crosslinking of this sheath material was increased.

Increasing the degree of crosslinking of the sheath material in this way improves the flame retardancy of the cable 6. When the flame retardancy was examined in the same manner as described above, the burning time was 1 second, and the melting and dropping of the sheath material due to the burning was not recognized at all.

However, when the waterproofness of the wheel speed sensor 1 to which the cable 6 is applied is evaluated in the same manner as above, the initial resistance value is extremely low at 10 kΩ or less, and the waterproof performance is poor. From this resistance value, it was found that the adhesion at the interface between the housing 3 and the cable 6 hardly progressed during the injection molding of the housing 3.

In the second comparative example, as shown in Table 2, the above-mentioned octabromodiphenyl ether is used as the flame retardant, and the insulated wires 6a and 6b of the cable 6 are the same as in the first example. An intermediate layer was formed on the outer periphery, and a sheath material of a mixture obtained by mixing polyester elastomer and a flame retardant octabromodiphenyl ether was formed, and the sheath material was irradiated with an electron beam. However, the irradiation amount of this electron beam was increased to 250 kGy to increase the degree of crosslinking of this sheath material.

The flame retardancy of this cable 6 was also examined. As a result, the burning time was 3 seconds, and no melting and dropping of the sheath material due to burning was observed.

However, when the waterproofness of the wheel speed sensor 1 to which the cable 6 is applied is evaluated, the initial resistance value is as low as 10 kΩ or less, which is inferior in waterproofing performance, and the housing 3 and the cable 6 are inferior. It was found that the adhesion at the interface of No. 1 was not progressing.

Next, in the third comparative example, as shown in Table 3, polyurethane elastomer was applied instead of the main polyester elastomer, and decabromodiphenyl ether was used as a flame retardant. An intermediate layer was formed on the outer circumferences of the electric wires 6a and 6b, and a sheath material of a mixture of polyurethane elastomer and decabromodiphenyl ether as a flame retardant was formed, and the sheath material was irradiated with an electron beam.

[0065]

[Table 3]

As a result of examining the flame retardancy of this cable 6, the burning time was 1 second, and the melting and dropping of the sheath material due to the burning was not recognized at all.

However, when the waterproofness of the wheel speed sensor 1 to which the cable 6 is applied was evaluated, the initial resistance value was extremely low, 10 kΩ or less, and the waterproof performance was poor, and the interface between the housing 3 and the cable 6 was poor. Almost no adhesion was made.

In the fourth comparative example, as shown in Table 3, a polyurethane type is used instead of the polyester elastomer, and ethylene bis (pentabromobenzene) is used as a flame retardant. An intermediate layer is formed on the outer circumference of the insulated wires 6a and 6b, and a sheath material is formed by mixing polyurethane elastomer and a flame retardant ethylene bis (pentabromobenzene), and the sheath material is irradiated with an electron beam. did.

The burning time of this cable 6 is 3
In seconds, no melting and dropping of the sheath material due to combustion is observed.

However, when the waterproofness of the wheel speed sensor 1 to which this cable 6 is applied is evaluated, the initial resistance value is extremely low, 10 kΩ or less, and the housing 3
Adhesion at the interface between the cable 6 and the cable 6 hardly progressed.

Comparison of the first to third embodiments and the fourth embodiment,
As is clear from the comparison between the first to third examples and the first and second comparative examples, flame retardants other than polybromodiphenyl ether such as decabromodiphenyl ether and octabromodiphenyl ether are used as flame retardants for thermoplastic polyester elastomers. It is more preferable to use. That is, when these flame retardants are applied and the degree of crosslinking of the resin composition mainly composed of thermoplastic polyester elastomer is increased, the housing 3 formed by injection molding of PBT resin and the resin composition having the increased degree of crosslinking are obtained. Adhesion at the interface of the cable 6 made of is poor, and a predetermined waterproof performance cannot be achieved.

When a resin composition mainly composed of thermoplastic polyurethane elastomer is used as in the third and fourth comparative examples, the adhesion at the interface between the cable 6 and the housing 3 is poor and a predetermined waterproof performance is obtained. I can't.

[0073]

As described above, in the present invention, as the sheath material of the cable, the crosslinked body of the resin composition mainly composed of the flame retarded thermoplastic polyester elastomer is applied. The crosslinked body of this resin composition not only has various characteristics such as abrasion resistance and bending resistance required for the sheath material of the cable, but also only adheres between the housing and the cable due to the melt molding of the housing. Thus, sufficient airtightness can be obtained. Therefore, sufficient airtightness and durability can be obtained without using a special component, that is, an O-ring or a seal member.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an example of a wheel speed sensor.

FIG. 2 is a sectional view showing another example of a wheel speed sensor.

FIG. 3 is a sectional view showing another example of a wheel speed sensor.

FIG. 4 is a diagram showing an example of an experiment for measuring the insulation resistance of a wheel speed sensor.

[Explanation of symbols] 1 wheel speed sensor 2 magnetic rotor 3 housing 4 yoke 5 electromagnetic coil 6 cable

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location F02D 45/00 F02D 45/00 G01D 5/00 G01D 5/00 G01P 3/488 G01P 3/488 ( 72) Inventor Satoshi Ebina 1-6, Higashisakura, Higashi-ku, Nagoya-shi Sumitomo Electric Industries, Ltd. Chubu Branch (72) Inventor Tetsuji Aoki, 3 Satsuki-cho, Kanuma City Sumitomo Electric Industries, Ltd. Kanto Works (72) ) Inventor Atsuko Hagio 3 at 3 Satsuki-cho, Kanuma City In Kanto Works (72) Inventor Hironari Matsubara 1 Toyota-cho, Toyota-shi Toyota Motor Corporation (72) Inventor Takashi Kobayashi Toyota-cho, Toyota-shi No. 1 Toyota Motor Co., Ltd. (72) Inventor Tatsuya Kagaya No. 1 Toyota-cho, Toyota City Toyota Motor Corporation In-house (72) Inventor Atsushi Mizuno 1 Toyota-cho, Toyota-shi Toyota Motor Corporation

Claims (5)

[Claims] 1. A housing for sealing a main body device, and a cable connected to the main body device and extending through the housing, wherein the housing is formed by melt molding of a thermoplastic resin, and In the connection structure of a housing and a cable for hermetically sealing the space between cables, the sheath material of the cable is a connection structure of the housing and the cable, which is a cross-linked body of a resin composition mainly composed of flame-retarded thermoplastic polyester elastomer. 2. The connection structure for a housing and a cable according to claim 1, wherein the flame retardation is achieved by a flame retardant excluding polybromodiphenyl ether. 3. The flame retardant is one or a mixture of two or more selected from the group consisting of ethylenebisbrominated phthalimide, bis (brominated phenyl) ethane and bis (brominated phenyl) terephthalamide. Connection structure of the housing and cable described. 4. The housing-cable connection structure according to claim 1, wherein the amorphous soft segment of the thermoplastic polyester elastomer is polyoxymethylene glycol. 5. A housing for sealing the main body device, and a cable connected to the main body device and led out through the housing, wherein the sheath material of the cable is mainly made of flame-retardant thermoplastic polyester elastomer. A method for connecting a housing and a cable, which is a cross-linked body of the resin composition, wherein the housing is formed by melt molding of a thermoplastic resin, and the space between the housing and the cable is hermetically sealed.