JP2001165702A - Magnetic variate detecting sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a cost which enhancing versality. SOLUTION: A main body part 30 which has a detection part 20 and a fixed part 9 is constituted as a different body. In general, the detection part 20 has its shape and structure determined by a body to be detected such as a pulser ring and the fixed part 9 has its shape and structure determined by the structure of fitting parts of respective kinds of automobile, etc. Consequently, the united structure of respective detection parts 20 and respective main body parts 30 is made common and then a necessary wheel speed sensor, etc., can be obtained by uniting a main body part 30 corresponding to a fitting part. Namely, the versatility increases. The detection part 20 is provided with an output terminal 21 and the main body part 30 is provided with a repeating terminal 31 respectively; and both the terminals 21 and 31 are connected by engagement. The engagement connection is completed by one operation and made inexpensive.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention
The present invention relates to a sensor that detects a magnetic variation using a magnetoelectric conversion element such as an R element (magnetic resistance element).

[0002]

2. Description of the Related Art This type of sensor is widely used for detecting rotation speed, rotation speed, rotation angle, etc. of various rotating bodies such as wheels, detecting speeds other than rotation, and relative displacements. For the sake of convenience, taking an example of a sensor for detecting rotation, the magnetic variable detection sensor used for the rotation detection is:
Provided to face a ferromagnetic pulsar ring with gear-shaped teeth on the periphery or a magnet pulsar ring magnetized so that S and N poles appear alternately and continuously on the periphery of the surface. And detects the fluctuation of the magnetic field due to the rotation of the pulsar ring.

The magnetic variable detection sensor is disclosed in Japanese Unexamined Patent Publication No.
JP-A-98736 and JP-A-8-219709 propose various configurations, for example, FIG.
The sensor shown in FIG. 4 is provided with a magnetic detection IC chip 2 and its circuit portion 3 on a substrate 1, and accommodates the substrate 1 and the magnet 4 in a resin holder 6 into which a relay terminal 7 is inserted to form a detection portion. Then, the resin holder 6 is housed in the metal case 5, and then the output line 8 is connected to the relay terminal 7 from the substrate 1.
After the connection, the outer shell 10 including the fixing part 9 is formed by resin molding and integrated with the detecting part. In the figure, reference numeral 11 denotes a metal bush.

[0004]

As described above, in the conventional magnetic variable detection sensor, the detection unit is housed in the metal case 5,
Since the outer shell 10 is integrally formed by resin molding, in order to use it under a pulsar ring or a mounting structure that is generally different depending on the detection target, the entire structure of the sensor is reviewed and each detection target is checked. Type (shape / configuration) corresponding to
It is necessary to manufacture the sensor of the above, and the versatility is extremely low.
For example, in a wheel speed sensor that detects the rotation speed of a vehicle wheel, the pulsar ring and the mounting structure often differ depending on the vehicle type, front and rear wheels, etc. ing.

Also, a process of connecting electronic components such as the magnetic detection IC chip 2 to the substrate 1 by soldering, a process of connecting the substrate 1 and the relay terminals 7 by solder, and a process of connecting the relay terminals 7 and the output lines 8 by soldering Since there are various steps such as the step of performing soldering, it is necessary to perform many soldering operations, and there is a problem that the manufacturing process is complicated, the manufacturing operation takes time, and the manufacturing cost increases.

SUMMARY OF THE INVENTION In view of the above-mentioned circumstances, it is an object of the present invention to reduce costs by increasing versatility, simplifying a manufacturing process, and the like.

[0007]

In order to solve the above-mentioned problems, according to the present invention, a detecting section and a main body having a fixing section are separately provided. Generally, the type (shape / configuration) of the detection unit is determined by pulsaring, etc.
The shape and configuration of the fixed part are determined by the structure of the attachment part of the object to be detected. For this reason, if the integrated structure of each detecting unit and each main unit is shared, the required magnetic unit can be integrated by integrating the detecting unit corresponding to the pulsar ring and the main unit corresponding to the mounting unit. A variable detection sensor can be obtained. If a failure occurs,
For example, only the detection unit needs to be replaced.

Next, according to the present invention, an output terminal is provided in the detection section, and a relay terminal is provided in the main body, and the two terminals are connected by fitting (connector connection).
The mating connection is inexpensive after the operation is completed with one touch. In addition, if a fitting structure is provided in each of the detection unit and the body of the main body, the detection unit can be accurately positioned and can be easily integrated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a magneto-electric conversion element and a circuit portion thereof are provided inside, a detection signal is output to the outside by an output line from the circuit portion, and an outward projection is provided. In a magnetic variable detection sensor attached to an object to be detected with a fixed portion provided, a body of the sensor is divided into a detecting portion provided with the magnetoelectric conversion element and its circuit portion, and a main body portion having the fixed portion. The detection unit is provided with an output terminal from the circuit unit, the main unit is provided with a relay terminal connected to the output line, and the two divided bodies are integrated, so that the two terminals are fitted and connected. The following configuration is adopted.

In this configuration, the two divided bodies are
If it is an integrated resin molded product with the magneto-electric conversion element, its circuit part, output terminal, or relay terminal inserted, the body will be mechanically strong, as well as highly sealed, resistant to vibration and dust. Becomes

[0011] At this time, in the detection section, Japanese Patent Application No.
Even if the electronic component and the resin themselves are thermally expanded as disclosed in Japanese Patent No. 328376, the electronic component may be partially surrounded by an elastic resin such as a silicone resin which does not adversely affect the magnetoelectric exchange element and the electronic component. .

Further, if the two divided bodies are integrated by fitting, the detection portion can be accurately positioned and easily integrated. Further, if at least one of the fitting structure of the two divided bodies and the fitting structure of the two terminals is provided with a retaining mechanism, the fitting becomes strong and the connection reliability of the two terminals is improved.

The magnetic variable detection sensor may be any sensor that detects magnetic field fluctuation. For example, a magnet for supplying a bias magnetic field to the magneto-electric conversion element may be provided in the detection unit. It is needless to say that it can be adopted for other types. Further, the present invention can be adopted for detection other than rotation.

[0014]

FIG. 1 shows an embodiment, which is divided into a detecting section 20 and a main body section 30 having a fixing section 9. As shown in FIG. 3C, the detection unit 20 attaches a magnetic detection IC to a lead frame 22 having an output terminal 21.
A chip 2 and a circuit section 3 composed of electronic components such as a control resistor and a capacitor are provided, and the lead frame 22 is resin-molded 27 together with the magnet 4. Main unit 30
Is formed by resin molding 37 by inserting the relay terminal 31 to which the output line 8 is crimp-connected.

In this embodiment, as shown in FIGS. 3A and 3B, when the detecting section 20 is fitted into the main body section 30, the output terminal 21 is inserted into the relay terminal 31 and fitted and connected (connector connection). Is done. At this time, the space between the detector 20 and the main body 30 is O
Seal with ring 23.

In the embodiment shown in FIG. 2, the hook 24 and its locking portion 34 are formed in the fitting portion between the detecting portion 20 and the main body portion 30, and the output line 8 is connected to a connector. For this reason, the rear part of the main body 30 is connected to the output connector 33.
The other end of the relay terminal 31 is also a connector terminal 32.

In this embodiment, as shown in FIGS. 3A and 3B, when the detection unit 20 is fitted into the main body 30, the output terminal 21 is inserted into the relay terminal 31 as in the above-described embodiment. To connect and connect (connector).
The detection section 20 is securely fitted to and integrated with the main body section 30 by the 4 and the locking section 34. At this time, an O-ring 23 may be interposed as in the above-described embodiment.

In each embodiment, the body 2 of the detection unit 20
The fitting of the concave and convex between the body 7 and the body 37 of the main body 30 may be reversed, and the fitting mode between the output terminal 21 and the relay terminal 31 may be male, female, or reversed. In these fittings, the terminals 21 and 31 can be provided with a lance or the like for engaging both (see FIG. 1A). Further, in the embodiment of FIG. 1, the configuration of the output connector 33 can be adopted, and conversely, in the embodiment of FIG. 2, the crimp connection configuration of FIG. 1 can be adopted.

In the embodiment, the detection unit 20 is a resin molded product. However, in the present invention, a case storage structure shown in FIGS. 3 and 4 may be employed.

[0020]

As described above, according to the present invention, the detecting portion and the mounting main body are formed as separate members, and both of them are electrically connected to each other by fitting and joining the terminals to be integrated. Because
The versatility is improved, and the cost can be reduced.

[Brief description of the drawings]

FIG. 1A is a cutaway front view of an embodiment before assembling;
(B) is a cutaway front view after assembling the same, and (c) is a bottom view of the detection unit with its mold removed.

FIG. 2A is a cut-away front view of another embodiment before assembling;
(B) is a cutaway front view after the assembly.

FIG. 3 is a perspective view of a conventional example.

FIG. 4 is a sectional front view of the same.

[Explanation of symbols]

 2 magnetoelectric conversion element (magnetic detection IC chip) 3 circuit section (control electronic component) 4 magnet 8 output line 9 fixing section 20 detection section 21 output terminal 22 lead frame 23 O-ring 24 hook 27 detection section body 30 main body section 31 Relay terminal 32 Connector terminal 33 Output connector 34 Locking part 37 Body body

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2F063 AA35 EA03 EB05 EB07 GA52 2F077 PP12 PP14 VV02 VV11 VV23 VV33 VV35 WW06 2G017 AA01 AC06 AD53 AD55

Claims (5)

[Claims] 1. A magnetoelectric conversion element 2 and a circuit section 3 thereof are provided inside, a detection signal is output to the outside by an output line 8 from the circuit section 3, and a fixing section 9 protruding outward is provided. A magnetic variable detection sensor to be attached to the object to be detected, wherein the body of the sensor is divided into a detection unit 20 provided with the magnetoelectric conversion element 2 and the circuit unit 3 and a main body unit 30 having the fixed unit 9 At the same time, the detection section 20 is provided with an output terminal 21 from the circuit section 3, the main body section 30 is provided with a relay terminal 31 connected to the output line 8, and the divided bodies 27 and 37 are integrated. Wherein the two terminals 21 and 31 are fitted and connected. 2. The apparatus according to claim 1, wherein said divided bodies 27 and 37 are formed as an integral resin molded product into which the magneto-electric conversion element 2, its circuit portion 3, the output terminal 21 or the relay terminal 31 is inserted. The magnetic variable detection sensor according to any one of the preceding claims. 3. The magnetic variable detection sensor according to claim 1, wherein the divided bodies 27 and 37 are integrated by fitting. 4. The magnetic variable according to claim 3, wherein at least one of the fitting structure of the divided bodies 27 and 37 and the fitting structure of the terminals 21 and 31 is provided with a retaining mechanism. Detection sensor. 5. The magnetic variable detection sensor according to claim 1, wherein the detection unit includes a magnet for supplying a bias magnetic field to the magnetoelectric conversion element.