JPS5820465B2 - Musetsushiyokusetsuzokushi - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a contactless connector using a magnetoresistive element made of indium antimonide In5b.

Conventionally, plug-in crimp terminals have been widely used as interfaces between electrical devices and connectors between electronic circuits.

However, since these connectors use mechanical contacts, after repeated use over a long period of time, a discharge occurs between the contacts, and this discharge causes carbon to adhere to the contacts, causing contact failure. Easy to occur.

Such contact defects also emit light due to wear of the contacts due to frequent connection operations, oxidation of the contacts, etc., and are a major cause of reduced reliability of the connector.

Furthermore, with conventional contact type connectors, the size of the load on the receiving side affects the transmitting side equipment. For example, if the current capacity of the receiving side load is large, a large current will flow through the transmitting side equipment, causing it to be destroyed. There is a danger that

The present invention uses a magnetoresistive element to make the contacts non-contact, eliminates the conventional drawbacks such as poor contact, and eliminates the influence of the receiving device on the transmitting device, allowing both devices to be designed independently of each other. It is possible.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the contactless connector 1 of the present invention includes a female part 2 from which an output signal from one device (not shown) is derived;
It consists of a male part 3 for inputting signals to the other device (not shown).

The female part 2 has a groove 4, and the male part 3 has a protrusion 5 which can fit into the groove 4.

By coupling these grooves 4 and protrusions 5, both parts are electrically connected.

FIG. 2 shows the internal structure of the male and female mold parts 2 and 3 with the respective ceramic packages 1 and 8 removed;
6... is a C-shaped yoke having a gap in a part, which is arranged in a plurality of rows, and the groove 4 is bored in the part of the pack 21 where the gap is located. .

In addition, each of the yokes 6, 6, and so on has an output line 1.
Solenoid coil 9 connected to 3, 13...
, 9... are wound, and the output M13, 13...
...The solenoid coil 9 and yoke 6 of the itch signal generate a corresponding magnetic field between the gaps.

Reference numeral 10 designates another solenoid coil having a hollow portion 11 provided in parallel with the yoke 6, and is supplied with power from an output side device via an output line 8.

Each of these parts is housed in a package 7 formed by a so-called ceramic laminated packaging technique in which several sheets of ceramic tape are pasted together and then baked.

In addition to this ceramic, resin with good water resistance such as Evokin resin mixed with glass fiber can also be used.

Next, the male mold part 8 will be explained.

The protrusion 5, which is a part of the package 8, is equipped with magnetic detection sections 12, 12, .・・・
are connected to input lines 15, 15, . . . to other devices, respectively.

Each of these parts is installed in the package 8 in the same manner as described above.

As shown in FIG. 3, the magnetic detection section 12
A magnetoresistive element 18 of the type nsb is sandwiched between the two ferrite plates 16 and 16 together with the ferrite chip 1T.

The ferrite plate 16.16 is sealed to the ceramic of the protruding portion 5 by a method such as metallization sealing, and the element 18 housing portion is kept airtight.

The ferrite chip 17 on the element 18 is provided to converge the magnetic field.

Reference numeral 19 denotes a conductive pattern embedded in the package 8, which is formed by a method such as printing when laminating ceramics.

20 is a lead wire that connects the electrode of the element 18 and the conductive pattern 19.

Reference numeral 21 denotes a ferrite rod that is provided in parallel with the protrusion 5 and protrudes beyond the package 8. A solenoid coil 10' is wound around the part located inside the package 8, and this solenoid coil 10' is further connected to the input line. 15.

When the male and female mold parts 1 and 8 are connected, the ferrite rod 21 is fitted into the hollow part 11 of the female mold part 7, and both coils 10 and 10'
are electromagnetically coupled to function as a power supply.

Various signals from the output device are converted into magnetic field signals in the female part 7, magnetically detected in the male part 8, converted back into electrical signals, and introduced into the input device.

FIG. 4 shows the rate of change in resistance due to the gap in the yoke 6 and the deviation in the position of the magnetic sensing part 12, and the value of the rate of change in resistance with respect to the deviation from the center in the coupling direction is = RH/Ro(R
H is the resistance value in a magnetic field, RO is the resistance value when the magnetic field is zero)
is plotted on the vertical axis, and the displacement in the bonding direction is plotted on the horizontal axis.

Here, the cross-sectional area of the yoke 6 was 9 m11L2, and the cross-sectional area of the ferrite plates 16, 16 was 10 m2.

As shown in the figure, it can be seen that if the on/off boundary is set at the level of K23, stable operation can be achieved with respect to deviations within approximately ±1.5 tIL11L.

As explained above, the non-contact connector of the present invention hermetically seals a magnetoresistive element using ceramic laminated packaging technology, and also sandwiches the magnetoresistive element together with a ferrite chip between two ferrite plates. Therefore, in order to efficiently converge the magnetic field signal generated from the external output side and apply it to the element, and to obtain a resistance change rate of 4 to 5, a coil of several thousand turns or less is required. It is sufficient to flow a current of several tens of mA.

Furthermore, it is possible to solve problems such as moisture resistance and mechanical strength, which were weaknesses of conventional 1°-sb elements, and because it is non-contact, it achieves significantly longer life and higher precision. ·Wear.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a contactless connector according to an embodiment of the present invention, FIG. 2 is a perspective view showing its internal purchase, and FIG. 3 is an I--
I cross-sectional view, FIG. 4 is a graph showing the resistance change rate curve in the same example. 1...Contactless connector, 2...Female part,
3...Male part, 4...Groove, 5...
...Protrusion, 7, 8...Package, 6...
... Yoke, 13 ... Output line, 9°10,
10'... Solenoid coil, 15...
・Input/output line, 12...Magnetic detection section, 14...
...Circuit parts, 16...Ferrite plate, 17
... Ferrite chip, 19 ... Conductive pattern, 20 ... Lead wire, 21 ...
・Ferrite rod.

Claims (1)

[Claims] 1 Contains a C-shaped yoke wound with a solenoid coil connected to the output line, has a female part having a groove in the gap part of the yoke, and a protrusion part connected to the groove, and has a protrusion part connected to the input line in the protrusion part. and a male part forming a magnetic detection part including connected magnetoresistive elements, and the contactless device is configured such that the magnetic detection part is located in the gap of the yoke when the male and female parts are coupled. Connector.