JP2523044Y2 - Hall effect type sensor device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a Hall effect type sensor device which can be preferably used, for example, for detecting a rotation angle in an ignition timing control device of an internal combustion engine.

[Conventional technology]

FIGS. 4 and 5 are views showing main parts when a conventional Hall effect type sensor device is used for an ignition timing control device of an internal combustion engine, wherein (1) is a distributor housing, and (2) is a diagram. A shaft (3) disposed at the center of the housing (1) and rotating in synchronization with the rotation of an internal combustion engine (not shown) is fixed to the shaft (2) and integrated with the shaft (2). This is a magnetic flux shutter made of a magnetic material provided so as to rotate in the direction shown in FIG. (3a) is a shutter provided at the tip of the magnetic flux shutter (3),
The magnetic material forming the shutter (3) is formed by cutting out a predetermined number of magnetic materials at equal intervals along the circumferential direction.
(4) is a magnet, (5) is a magnetic flux guide, (6) is a Hall effect element, and the Hall effect element (6) is disposed in a magnetic path formed by the magnet (4) and the magnetic flux guide (5). Further, the magnetic flux shutter (3) is configured to move in a direction crossing the magnetic path when rotating. (7) is a mold frame for integrally connecting the above (4), (5) and (6), and the above (4) to (7)
This constitutes a Hall effect sensor device (8). FIG. 5 shows the vicinity of the Hall effect element (6) in detail. (61) is a lead wire derived from the Hall effect element (6), (62) is a substrate, and (63) is a solder. ,
(71) is a sensor frame formed of a mold resin. The space V between the Hall effect element (6) and the sensor frame (71) is filled with a gel material made of a resin insulating material (not shown).

The Hall effect element (6) is a known element, and for example, a hybrid IC formed on a ceramic substrate, a hybrid IC molded into a package, or the like can be used.

In the above configuration, when the shaft (2) is rotated by the rotation of the engine, the magnetic flux shutter (3) fixed integrally with the shaft is also rotated, and the shutter portion (3a) at the tip end includes the Hall effect element (6). Move in the magnetic circuit. Since the shutter portion (3a) is formed in a blind shape, it is given to the Hall effect element (6) as a change in magnetic flux according to the rotation of the shaft (2). The Hall effect element (6) converts this into an electric signal, and eventually leads (6).
Via 1), it can be extracted as an electric signal corresponding to the rotation of the internal combustion engine. By processing the output signal of the Hall effect element (6) by a processing circuit (not shown), for example, the angle of the shaft (2) can be detected and the ignition timing can be controlled.

[Problems to be solved by the invention]

In the conventional Hall effect type sensor device configured as described above, the lead wire (61) and the substrate (62) are connected by the solder (63). Is easy to peel off and lacks reliability.
There is a problem that automation is difficult when assembling the apparatus.

The present invention has been made to solve the above-described problems, and has as its object to provide a Hall effect type sensor device which is highly reliable and can be automated.

[Means for solving the problem]

A Hall-effect sensor device according to the present invention includes a Hall-effect element provided in a magnetic circuit, a lead wire drawn out of the Hall-effect element and formed in a predetermined shape, and a predetermined lead electrically connected to the lead wire. It has a conductor formed in a shape, and connects the lead wire and the conductor by welding, and has a bent portion on at least one of the lead wire and the conductor, and the bent portion is the lead wire or The stress applied to the conductor can be absorbed.

[Operation] The connecting portion between the lead wire and the conductor in the present invention is connected by welding, so that the connecting portion does not break even during long-term use, improving reliability and enabling automation. . In addition, a bending portion provided on at least one of the lead wire and the conductor absorbs stress applied to the lead wire and the conductor.

〔Example〕

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. First
In the figure, (6) shows a hybrid on a ceramic substrate.
The Hall effect element in the form of an IC, (61a) and (61b) are bent portions of the lead wire (61), and (64) is mainly embedded in the sensor frame (71), and one end is a Hall effect element (6). )
Is a conductor protruding in the vicinity of. Arrow A indicates a spot weld between the ends of the lead wire (61) and the conductor (64). After the spot welding, the space V is filled with a gel material made of an insulating resin material, and the whole is integrated as in the conventional apparatus. The other components and parts are the same as those of the above-described conventional example, and thus the description thereof is omitted.

Next, the operation will be described. In the above embodiment,
Since the lead wire (61) of the Hall effect element (6) and the conductor (64) are joined by spot welding, a highly reliable Hall effect sensor device that is resistant to vibration and thermal stress due to long-term use is obtained. be able to. Moreover, because of the connection by welding, it is easy to automate the assembly of the device. Also, since the lead wire (61) and the conductor (64) are each formed in a predetermined shape, when the Hall effect element (6) is assembled, a spot weld between the lead wire (61) and the conductor (64) is formed. Assembly is easy because they match automatically. Further, at least one of the lead wire (61) and the conductor (64) has a bent portion (61a) (61b), and the bent portion (61a) (61b)
Because the area around is very soft gel material, lead wire (61)
Alternatively, the stress applied to the conductor (64) can be absorbed. That is, in an environment where a high temperature and a low temperature are repeated (for example, an automobile), the lead wire (61) and the conductor (64) are different from each other due to a difference in expansion coefficient between the sensor frame (71) and the lead wire (61) or the conductor (64). In some cases, a force may be generated to separate the spot welds at 64).
a) Since the periphery of (61b) is a gel material, the bent parts (61a) (61
By changing b), this force can be absorbed and peeling of the spot weld can be prevented.

FIG. 2 and FIG. 3 are cross-sectional views of essential parts showing another embodiment and still another embodiment of the present invention. In FIG. 2, as in the case of FIG. 1, a Hall effect element (6) which is formed as a hybrid IC on a ceramic substrate is used. The difference in the direction of the weld between the lead wire (61) and the conductor (64) and the like, and the provision of an opening (71a) for passing an electrode (not shown) for spot welding in the sensor frame (71). Others are the same as those in FIG. 3 is the same as that of FIG. 2 except that an epoxy packaged hybrid IC is used as the Hall effect element (6).

In the above embodiment, the connection between the lead wire (61) and the conductor (64) is described by spot welding. However, the connection is not necessarily limited to spot welding, and other welding means may be used. Further, the Hall effect element (6) also shows only two specific examples as examples.
It is not limited to the embodiment.

The above embodiment is merely an example for facilitating the understanding of the present invention, and it goes without saying that various modifications and changes are possible within the spirit and scope of the present invention.
Further, it goes without saying that the present invention can be used for other than the ignition timing control device of the internal combustion engine.

[Effect of the invention]

As described above, according to the present invention, since the connection between the lead wire and the conductor is connected by welding, the connection is not broken even during long-time use, improving reliability and enabling automation. become. Further, since the lead wire and the conductor are formed in a predetermined shape, assembly becomes easy. Furthermore, by forming a bent portion on at least one of the lead wire and the conductor, the stress applied to the welded joint between the lead wire and the conductor is absorbed by the bent portion, and the effect of preventing disconnection at the welded joint can be prevented. is there.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a main part of a Hall effect type sensor device according to one embodiment of the present invention, FIG. 2 is a main part sectional view showing another embodiment of the present invention, and FIG. FIG. 4 is a cross-sectional view of a main part showing a still another embodiment, FIG. 4 is a cross-sectional view of a main part showing a general example in which a conventional Hall effect sensor device is used for an ignition timing control device of an internal combustion engine, and FIG. FIG. 5 is a cross-sectional view showing details in the vicinity of the Hall effect element in FIG. 4. In the figure, (6) is a Hall effect element, (61) is a lead wire, and (64) is a conductor. In the drawings, the same reference numerals indicate the same or corresponding parts.

 ────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-62-8486 (JP, A) JP-A-59-109912 (JP, U) US Patent 4,165,726 (US, A)

Claims (1)

(57) [Scope of request for utility model registration] 1. A Hall effect element provided in a magnetic circuit,
A lead wire drawn out of the Hall effect element and formed in a predetermined shape, a conductor electrically connected to the lead wire and formed in a predetermined shape, and the lead wire and the conductor are connected by welding. Wherein at least one of the lead wire and the conductor has a bent portion, and the bent portion is deformable when stress is applied to the lead wire or the conductor. Effect type sensor device.