JPH08111260A - Sealing structure of harness lead-out part of rotary sensor - Google Patents

Sealing structure of harness lead-out part of rotary sensor

Info

Publication number
JPH08111260A
JPH08111260A JP24596994A JP24596994A JPH08111260A JP H08111260 A JPH08111260 A JP H08111260A JP 24596994 A JP24596994 A JP 24596994A JP 24596994 A JP24596994 A JP 24596994A JP H08111260 A JPH08111260 A JP H08111260A
Authority
JP
Japan
Prior art keywords
resin
sealing portion
harness
sealing
seal structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP24596994A
Other languages
Japanese (ja)
Inventor
Shigenobu Okusaka
茂宣 奥坂
Original Assignee
Sumitomo Electric Ind Ltd
住友電気工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sumitomo Electric Ind Ltd, 住友電気工業株式会社 filed Critical Sumitomo Electric Ind Ltd
Priority to JP24596994A priority Critical patent/JPH08111260A/en
Publication of JPH08111260A publication Critical patent/JPH08111260A/en
Pending legal-status Critical Current

Links

Abstract

(57) [Abstract] [Purpose] To provide a seal structure capable of improving the watertightness of the wire harness outlet of a rotation sensor. [Structure] The sealing portion 6 made of a thermoplastic resin provided on the outer surface of the wire harness 5 is formed into a shape in which the tip of a ridge 7 on the outer periphery is sharply pointed, and this ridge is melted by the molding heat of the molding resin 3 without fail. It is fused to the mold resin 3. Therefore, the interface serving as a water entry path is eliminated, and the watertightness of the harness outlet portion is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a harness outlet seal structure effective for enhancing the waterproof performance of a wheel rotation speed detecting rotation sensor mounted on an automobile.

[0002]

2. Description of the Related Art A rotation sensor used for detecting the number of rotations of an automobile is required to be excellent in waterproofness because it is attached to a place where water is inevitable.

Therefore, the conventional general rotation sensor is
As shown in FIG. 3, a rear opening of the detection unit 1 (the detection unit is configured by housing a magnet, a pole piece, a coil for power generation or a magnetic sensing element in a cylindrical housing 2) is closed with a mold resin 3. With this resin, the signal transmission wire harness 5 connected to the output terminal 4 of the sensor is integrated, and at the same time, waterproof sealing is performed.

Generally, a high melting point thermoplastic resin is used as the mold resin 3, but this resin has poor adhesion to the harness outer skin, and in the structure in which this resin is directly molded on the harness outer skin, an interface with the outer skin is formed. Water penetrates into the detection unit. Therefore, a method is adopted in which a sealing portion 6 made of a thermoplastic resin that adheres to the outer surface of the harness is formed on the outer surface of the harness, and movement of water is stopped by the ridges and valleys 7 provided on the outer periphery of the sealing portion 6. .

[0005]

The ridges and valleys 7 provided in the conventional sealing portion are useful for making a difference in height of the moving path of water and lengthening the moving path, but the mountain as shown in FIG. 3 is used. In the shape, the interface itself with the resin 3 cannot be eliminated, and there is a risk that water will flow into the interior by overcoming the mountain due to a capillary phenomenon or the like.

An object of the present invention is to enhance the sealing performance of the above-mentioned harness lead-out portion in order to enhance the reliability of waterproofness of the rotation sensor.

[0007]

In order to solve the above problems, the present invention provides a structure in which the tip of the ridge on the outer periphery of the sealing portion provided on the harness outer skin is sharpened to fuse the sealing portion to the molding resin. It was adopted. In addition,
If the sealing part has a shape having a bulge at the tip of the sharpened mountain, the fusion with the molding resin becomes stronger.

[0008]

The resin for the sealing portion has a melting point lower than that of the molding resin covering the outer periphery of the sealing resin.

Further, in the manufacture of the rotation sensor as shown in FIG. 3, a method is employed in which a sealing portion is provided on the outer surface of the harness in advance and a molding resin is injection-molded in a later step. Therefore, the sealing part is naturally heated by the mold heat of the molding resin, but since the time for which the mold heat is applied is extremely short, the peak temperature of the conventional sealing part with a large heat capacity does not raise the peak temperature to the melting point. Insufficient fusion with the mold resin leaves an interface serving as a water entry path.

On the other hand, in the structure of the present invention, since the tip of the crest of the sealing portion is sharp, the temperature of the crest exceeds the melting point even by the heat applied momentarily, whereby the crest melts and melts with the mold resin. Adhesion occurs, the aforementioned interface itself disappears, and the reliability of the watertight seal increases.

If a bulge is provided at the tip of the crest, the contact area of the mold resin is expanded and the mold heat is easily absorbed, so that the degree of fusion is increased and the fusion is further strengthened.

[0012]

1 and 2 show specific examples of the seal structure of the present invention. In the figure, 5 is a wire harness connected to the output terminal of the rotation sensor, and 6 is a sealing portion provided on the terminal outer skin of the harness.

The sealing portion 6 is formed of a thermoplastic resin having good adhesion to the harness outer skin, and the resin adheres to the harness outer skin during molding on the harness to form a seal with the outer skin. ing.

On the outer circumference of the sealing portion 6, there are provided ridges 7 as in the conventional case. Unlike the conventional shape, the mountain has a sharp tip as shown in FIG. 1 (a),
Therefore, the mountain is surely melted by the mold heat of the resin 3 shown in FIG. 1B, the interface with the resin 3 is lost, and the water intrusion route is blocked.

In FIG. 2 (a), a bulged portion 8 having a lump shape or a spherical shape is provided at the tip of the sharpened ridge, and the mold surface heat of the resin 3 is concentrated on the tip portion of the ridge due to the increase in the surface area due to the bulge. To join. Therefore, melting of the mountain is likely to occur, and the state of fusion is improved.

In the embodiment, the thermoplastic resin is used as the resin for the sealing portion 6 and the high melting point thermoplastic resin is used as the molding resin 3, but the combination of the resins is not limited to this.

[0017]

As described above, in the seal structure of the present invention, the sealing portion on the outer surface of the harness covered with the molding resin is surely fused to the molding resin by devising the shape of the mountain provided on the outer periphery of the sealing portion. I decided to wear it,
It becomes possible to improve the waterproof performance of the rotation sensor by increasing the watertightness of the harness outlet portion, which was not sufficient with the conventional structure.

[Brief description of drawings]

FIG. 1A is a sectional view showing an example of a sealing portion provided on a harness outer skin. FIG. 1B is a sectional view showing an example of a sealing structure of the present invention using the same sealing portion.

FIG. 2A is a cross-sectional view showing another example of the sealing portion, and FIG. 2B is a cross-sectional view of another example of the seal structure of the present invention using the same sealing portion.

FIG. 3 is a sectional view showing an outline of a rotation sensor to which the present invention is applied.

[Explanation of symbols]

 1 Detection part 2 Cylindrical housing 3 Mold resin 4 Output terminal 5 Wire harness 6 Sealing part

Claims (2)

[Claims]
1. A sealing portion of a thermoplastic resin having adhesiveness with respect to the outer skin of a wire harness for extracting a sensor output, and a sealing portion having ridges and valleys on the outer periphery is formed in a molding resin at the rear of the sensor. In the seal structure of the harness outlet part which is buried in the liquid sealing the harness outlet part from the mold resin, the sealing part is
A seal structure for a harness outlet portion in a rotation sensor, characterized in that a tip of a mountain on the outer periphery is sharpened and fused to a molding resin.
2. A harness outlet in a rotation sensor in which the sealing portion in the seal structure according to claim 1 is replaced with a bulge portion provided at the tip of a sharpened mountain, and the sealing portion is fused to a molding resin. Part seal structure.
JP24596994A 1994-10-12 1994-10-12 Sealing structure of harness lead-out part of rotary sensor Pending JPH08111260A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24596994A JPH08111260A (en) 1994-10-12 1994-10-12 Sealing structure of harness lead-out part of rotary sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24596994A JPH08111260A (en) 1994-10-12 1994-10-12 Sealing structure of harness lead-out part of rotary sensor

Publications (1)

Publication Number Publication Date
JPH08111260A true JPH08111260A (en) 1996-04-30

Family

ID=17141534

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24596994A Pending JPH08111260A (en) 1994-10-12 1994-10-12 Sealing structure of harness lead-out part of rotary sensor

Country Status (1)

Country Link
JP (1) JPH08111260A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009042085A1 (en) 2008-09-30 2010-04-01 Aisin Seiki Kabushiki Kaisha, Kariya-shi Sealing connection structure and sealing connection method
EP2884243A1 (en) 2013-12-10 2015-06-17 Hitachi Metals, Ltd. Physical quantity measurement sensor, method of manufacturing physical quantity measurement sensor, sealing structure of physical quantity measurement sensor and method of manufacturing cable with resin molded body
US9267502B2 (en) 2012-06-08 2016-02-23 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor
JP2018528432A (en) * 2015-09-24 2018-09-27 シリコン マイクロストラクチャーズ, インコーポレイテッドSilicon Microstructures, Inc. Manufacture of catheter sensors
US10641672B2 (en) 2015-09-24 2020-05-05 Silicon Microstructures, Inc. Manufacturing catheter sensors
US10682498B2 (en) 2015-09-24 2020-06-16 Silicon Microstructures, Inc. Light shields for catheter sensors

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009042085A1 (en) 2008-09-30 2010-04-01 Aisin Seiki Kabushiki Kaisha, Kariya-shi Sealing connection structure and sealing connection method
US9267502B2 (en) 2012-06-08 2016-02-23 Kabushiki Kaisha Toyota Jidoshokki Motor-driven compressor
EP2884243A1 (en) 2013-12-10 2015-06-17 Hitachi Metals, Ltd. Physical quantity measurement sensor, method of manufacturing physical quantity measurement sensor, sealing structure of physical quantity measurement sensor and method of manufacturing cable with resin molded body
US9701051B2 (en) 2013-12-10 2017-07-11 Hitachi Metals, Ltd. Physical quantity measurement sensor, method of manufacturing physical quantity measurement sensor, sealing structure of physical quantity measurement sensor and method of manufacturing cable with resin molded body
JP2018528432A (en) * 2015-09-24 2018-09-27 シリコン マイクロストラクチャーズ, インコーポレイテッドSilicon Microstructures, Inc. Manufacture of catheter sensors
US10641672B2 (en) 2015-09-24 2020-05-05 Silicon Microstructures, Inc. Manufacturing catheter sensors
US10682498B2 (en) 2015-09-24 2020-06-16 Silicon Microstructures, Inc. Light shields for catheter sensors

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