JPH1114304A - Rotary sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a rotary sensor which can prevent a positional deviation and destruction of a Hall IC and get stable results of position detection. SOLUTION: This sensor comprises a connector 10, an electrical part installed with a Hall IC 32, and a case. In this case, a fixing part of the connector 10 is connected to the electric part on which the Hall IC 32 is installed, and a spacer part 18 is possessed on the extension of the fixing part of the connector 10, and the Hall IC body is arranged at a part of a space which is formed when the connector 10 and the case are connected with each other, where the Hall IC 32 is not moved by the pressure stress of the inner surface of the case.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotation sensor, and more particularly to a rotation sensor for detecting the positions of a crank angle and a cam angle used in an internal combustion engine.

[0002]

2. Description of the Related Art Heretofore, there has been known a rotation sensor of an internal combustion engine which detects a position of a crank angle and a cam angle by using a Hall IC utilizing a Hall effect. That is, conventionally, a Hall IC that generates an electric signal according to a rotation angle of a crank angle or a cam angle of an internal combustion engine.
There is known a hybrid IC in which a waveform shaping IC for shaping a waveform of the electric signal is configured as a hybrid (integrated), and the output of the hybrid IC is used to control an internal combustion engine.

FIG. 2 is a side sectional view of the above-mentioned rotation sensor. As shown in FIG. 2, the rotation sensor is formed by covering the connector 10 having the terminal 12 with a non-magnetic metal cover 50. More specifically, the connector 10 has a hole
The hybrid IC 30 has a tongue-shaped fixing portion 14 for mounting a hybrid IC 30 on which an IC 32 and a waveform shaping IC 34 are mounted.
And the terminal 12 are connected by wire bonding.

The non-magnetic metal cover 50 has a hollow inside and has a shape in which only one surface is opened, and the fixing portion 14 of the connector 10 and the hybrid IC 30 are inserted through the opening. Here, the edge of the opening is a caulking portion 52, which is fitted into the concave connection portion 16 of the connector 10, and the connector 10 and the non-magnetic metal cover 50
And integration. 40 is a magnet for giving the Hall effect.

In the above configuration, the Hall IC 32 is directly disposed near the bottom surface of the non-magnetic metal cover 50, picks up a signal change due to the passage of the protrusion of the rotating body 20, and sends this signal to the waveform shaping IC 34. Is sent to an external processing unit (not shown) via a terminal 12.

[0006]

However, in the rotation sensor having the above-described configuration, the Hall IC 32 is disposed directly near the bottom surface of the non-magnetic metal cover 50, so that the following problem occurs. That is, since the cover 50 is made of a nonmagnetic metal, the dimensional accuracy of the caulked portion 52 is poor, and the bending angle and the length dimension vary. Therefore, when fitting the cover 50 to the connector 10, depending on the product, pressure may be applied to the Hall IC 32 to bend the fixing portion 14, or when the cover 50 is joined to the connector 10, the cover 50 may be bent.
There is a problem that the Hall IC 32 is broken by the pressure coming from the bottom surface of the IC.

Further, even if the Hall IC 32 is not broken, if the bend is made as described above, the dimension L in FIG. 2 differs for each product, so that an accurate position detection result cannot be obtained, which may affect the subsequent processing. Is supposed to have an effect.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a rotation sensor capable of preventing a displacement or destruction of a Hall IC and obtaining a stable detection result.

[0009]

According to the present invention, there is provided a rotation sensor comprising a connector, an electric component on which a Hall IC is mounted, and a case, wherein the Hall IC is fixed to a fixing portion of the connector. A space formed by joining the electric components to be mounted and having a spacer portion on the extension of the fixed portion, wherein the spacer portion is formed when the connector and the case are joined and the Hall IC does not move due to the pressure stress of the inner surface of the case. And a rotation sensor having a Hall IC body disposed therein, and preferably, the case is formed of plastic, resin, or the like.

[0010]

An embodiment of the present invention will be described with reference to FIG. In FIG. 1, the rotation sensor is a connector having a terminal 12.
It is formed by covering 10 with a non-magnetic metal cover 50. More specifically, the connector 10 has a tongue-shaped fixing portion 14 for mounting a hybrid IC 30 on which a Hall IC 32 and a waveform shaping IC 34 are mounted, and the output portion of the hybrid IC 30 and the terminal 12 are connected by wire bonding. It is connected.

The non-magnetic metal cover 50 has a hollow inside, and has a shape in which only one surface is opened, and the fixing portion 14 of the connector 10, the hybrid IC 30 and the like are inserted through the opening. Here, the edge of the opening is a caulking portion 52, which is fitted into the concave connection portion 16 of the connector 10, and the connector 10 and the non-magnetic metal cover 50
And integration. 40 is a magnet for giving the Hall effect.

In the above configuration, the fixing portion 14 is in contact with the bottom surface of the non-magnetic metal cover 50 and has a spacer so that the length L does not vary when the non-magnetic metal cover 50 and the connector 10 are joined. It has a part 18. Here Hall IC
32 is arranged in the space created by the spacer section 18. Specifically, the foot (lead portion) of the Hall IC 32 is arranged so as to penetrate the spacer portion 18, and the spacer portion 18 extending from the fixed portion 14 also extends downward in an "L" shape. The main body sensor portion of the Hall IC 32 is disposed inside the “U” formed by 18.

The Hall IC 32 arranged as described above
Picks up the change in the signal due to the passage of the protrusion of the rotating body 20,
This signal is sent to the waveform shaping IC 34, and the processing result is sent to an external processing unit (not shown) via the terminal 12.

In the above embodiment, it is preferable that the cover 50 is made of a plastic material with little molding variation. However, other resins or other metal materials may be used as long as they do not generate deformation pressure stress on the spacer portion 18. It may be.

Further, the spacer portion 18 is formed in the same manner as in the above embodiment.
The shape of the Hall IC 32 can be arbitrarily changed as long as the positioning of the main body of the Hall IC 32 does not change due to the pressure stress of the cover 50, without being limited to the V-shape. That is, the spacer portion 18
The same effect can be obtained if at least one is provided on the linear extension of the fixing portion 14.

[0016]

As described above, by providing a case made of a plastic material having excellent dimensional accuracy as described above and by providing the spacer portion 18, even when the case and the connector are joined and integrated, the Hall IC can be formed on the bottom surface of the case 50. Since the mounting position of the rotation sensor can be determined as desired, it is possible to provide a rotation sensor having stable quality and capable of easily realizing mass production.

[Brief description of the drawings]

FIG. 1 is a side sectional view of a rotation sensor according to an embodiment of the present invention.

FIG. 2 is a side sectional view of a conventional rotation sensor.

[Explanation of symbols]

 In the drawings, the same reference numerals indicate the same or corresponding parts. DESCRIPTION OF SYMBOLS 10 Connector 12 Terminal 14 Fixed part 16 Connection part 18 Spacer part 20 Rotating body 30 Hybrid IC 32 Hall IC 34 Waveform shaping IC 40 Magnet 50 Cover 52 Caulking part

Claims (2)

[Claims] 1. A rotation sensor comprising a connector, an electrical component on which a Hall IC is mounted, and a case, wherein an electrical component on which a Hall IC is mounted is fixed to a fixing portion of the connector.
A spacer IC is provided on the extension of the fixed part, and the Hall IC main body is arranged in a space formed by the spacer when the connector and the case are joined and the Hall IC does not move due to the pressure stress of the inner surface of the case. A rotation sensor. 2. The rotation sensor according to claim 1, wherein the case is formed of a resin.