JPH0431778A - Magnetic sensor - Google Patents

Abstract

PURPOSE:To facilitate an assembling operation and to increase the positional precision of lead wires by a method wherein the lead wires in a plurality of a magnetic sensor element are inserted through a piercing hole of a retaining member and fixed by pressing them by projecting pieces. CONSTITUTION:A pressing member 5 covering and fixing a magnetic sensor element 1 disposed on a retaining member 2 has a plurality of projecting pieces 6 whereby lead wires 3 inserted through a piercing hole 4 are pressed on a wall surface 4a. The lead wires 3 pressed on the wall surface 4a by these projecting pieces 6 are fixed with high positional precision and deformed little. When a magnetic sensor is fitted to a circuit board, accordingly, an operation of inserting the lead wires 3 in a plurality into a through hole, for instance, can be executed accurately and easily.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a magnetic sensor mainly used for rotation detection in the consumer and industrial fields.

Conventional technology A conventional magnetic sensor will be explained below.

FIGS. 2a and 2b are a perspective view and a side view, respectively, showing the configuration of a conventional magnetic sensor.

In the figure, 11 is a magnetic sensor element, 12 is a holding member that holds the magnetic sensor element 11, and 12 is a holding member that holds the magnetic sensor element 11.
It has a positioning part and a mounting part when attaching to a circuit board, etc. 13 is a lead wire drawn out from the magnetic sensor element 11. The lead wire 13 is made of a springy material in order to absorb expansion and contraction due to heat during soldering and mechanical stress during position adjustment of the magnetic sensor.

Problems to be Solved by the Invention However, in the conventional configuration described above, the lead wire 13 is easily deformed, and the land on the circuit board to which the lead wire 13 is soldered cannot be made small, or the lead wire cannot be guided into a through hole of the circuit board. The problem was that it was difficult.

SUMMARY OF THE INVENTION The present invention solves the above conventional problems, and aims to provide a magnetic sensor in which lead wires are less deformed and position accuracy can be improved without changing the material of the lead wires.

Means for Solving the Problems To achieve this object, the magnetic sensor of the present invention comprises a magnetic sensor element having a ferromagnetic thin film on a substrate and a plurality of lead wires drawn out in the same direction, and this magnetic sensor element. and a holding member having a plurality of through holes into which the lead wires are inserted, and a pressing member having a plurality of protruding pieces inserted into the through holes and pressing the lead wires against the wall surface of the through holes. It is something that

According to the magnetic sensor of the present invention configured in this way, the magnetic sensor element has a lead wire that has passed through the through hole and is pressed against the wall surface of the through hole by the protruding piece of the pressing member, so that the precision of the lead wire is improved. It is often fixed in place. Therefore, the lead wire is less deformed and positional accuracy can be improved.

EXAMPLE Hereinafter, a magnetic sensor according to an example of the present invention will be described with reference to the drawings.

Figures 1a, b, and c are a perspective view, a side view, and a sectional view, respectively, of the magnetic sensor of this embodiment. In addition, in FIG. 1d, which is a perspective view of the main part, 1 is a magnetic sensor element, which has a ferromagnetic thin film on a substrate, and has a structure in which a plurality of lead wires 3 are drawn out in the same direction. be. Reference numeral 2 denotes a holding member that holds the magnetic sensor element 1, and this holding member 2 is provided with the same number of through holes 4 as the lead wires 3, and when the lead wires 3 are inserted into the through holes 4, they protrude downward. . Reference numeral 5 denotes a pressing member that covers and fixes the magnetic sensor element 1 disposed on the holding member 2, and this pressing member 5 includes a plurality of protruding pieces 6 that press the lead wire 3 inserted into the through hole 4 against the wall surface 4a. There is. The lead wire 3 pressed against the wall surface 4a by the protruding piece 6 is fixed with high positional accuracy and is less deformed. Therefore, when attaching the magnetic sensor of this embodiment to a circuit board, it is possible to accurately and easily insert a plurality of lead wires 3 into through holes, for example.

In this embodiment, the lead wire 3 is inserted into the slit-like through hole 4 and pressed down with the protruding piece 6, but it is also possible to insert the lead wire into the groove-like notch and protrude from the inner wall of the groove. You may also press it down with piece 6.

Further, by tapering the wall surface 4a of the through hole 4 so that the width thereof is narrow and the width of the opposing wall surface wide, the lead wire 3 can be easily inserted and the lead wire 3 can be securely fixed.

Further, the longer the depth of the through hole 4 and the length of the protruding piece 6, the more securely the lead wire 3 can be fixed.

Effects of the Invention As described above, according to the present invention, the lead wires of a magnetic sensor element having a plurality of lead wires are inserted into the through holes of the holding member, and the assembly work is facilitated by pressing and fixing them with the protruding pieces. It is possible to realize an excellent magnetic sensor that can increase the positional accuracy of the lead wires.

[Brief explanation of the drawing]

Figure 1 fan, (bl, (C1 is a perspective view, side view, and cross-sectional view of a magnetic sensor in one embodiment of the present invention, Figure 1 (d) is a through hole and a protrusion in which a lead wire is fixed. Enlarged perspective view of the lead wire part, Figure 2 (a, tb) b
t is a perspective view and a side view of a conventional magnetic sensor. DESCRIPTION OF SYMBOLS 1... Magnetic sensor element, 2... Holding member, 3... Lead wire, 4... Through hole,
4a... Wall surface, 5... Pressing member,
6...Protruding piece. Name of agent: Patent attorney Shigetaka Awano / -Ja
Qi Zenza l\ko 2--IiPt member 3- Lead plot S-・Press 17 member 6...Construction piece

Claims (2)

[Claims] (1) A magnetic sensor element having a ferromagnetic thin film on a substrate and having a plurality of lead wires pulled out in the same direction, and a plurality of through holes that hold the magnetic sensor element and into which the lead wires are inserted. and a pressing member having a plurality of protruding pieces that are inserted into the through hole and press the lead wire against the wall surface of the through hole. (2) A magnetic sensor element that has a ferromagnetic thin film on a substrate and has multiple lead wires pulled out in the same direction, and a plurality of notched grooves that hold this magnetic sensor element and into which the lead wires are inserted. and a pressing member having a plurality of protruding pieces that are inserted into the notch groove and press the lead wire against the inner wall surface of the notch groove.