CN203490375U

CN203490375U - Miniature inductive proximity sensor

Info

Publication number: CN203490375U
Application number: CN201320534115.XU
Authority: CN
Inventors: 薛正国
Original assignee: Chengdu CAIC Electronics Co Ltd
Current assignee: Chengdu CAIC Electronics Co Ltd
Priority date: 2013-08-29
Filing date: 2013-08-29
Publication date: 2014-03-19
Anticipated expiration: 2023-08-29

Abstract

The utility model provides a miniature inductive proximity sensor. The proximity sensor comprises a coil combination (1), an iron core (2) made of soft-magnetic material, and lead wires (3) On the disc-shaped geometric body of the iron core (2), characteristic adjusting holes (4) for adjusting the size of the inductance are symmetrically formed on two sides of a central column of the iron core, and lead wire outgoing hoes (5) are formed far away from the central column of the iron core, being perpendicular to the connection line of the centers of the characteristic adjusting holes (4). The coil combination is inserted into the central column of the iron core, and input and output lead wires of the coil are led out through the lead wire outgoing hoes (5). According to the utility model, the coil combination with the lead wires is formed after insulating binding, and the lead wires are firm and reliable, so that the proximity sensor is small in size and light in weight; and the proximity sensor only has two mechanical processed components, being extraordinarily simple in structure.

Description

Micro electric Sensor

Technical field

The utility model relates to a kind of miniature inductance approach switch parts.

Background technology

In prior art, inductance type transducer is all that the classical theory producing according to inductance is developed, but its application is Protean, different designs, and its precision, range of application, resistance to environment capacity all differ widely.At present, domestic for measuring the Miniature Circular inductance approach switch sensor used of moving object and target range, otherwise while being measuring distance (being the working clearance) for 2.15mm, inductance is 19mH left and right, domestic nothing is applicable to the acquisition chip of this inductance value.Though be 5mH, volume (is about Φ 13.2 * 13mm greatly ²), make volume of switch larger.

The purpose of this utility model be for the working clearance be 2.15mm, to be that the inductance approach switch of 5mH particular requirement is microminiaturized research and develop inductance.

Summary of the invention

The purpose of this utility model is the weak point existing for above-mentioned prior art, provides a kind of simple in structure, and volume is little and lightweight, goes between solid reliable, and inductance characteristic is debugged micro electric Sensor simply and easily.

The purpose of this utility model can reach by following measures.A kind of micro electric Sensor that the utility model provides, comprise coil combination 1, the iron core 2 of being made by soft magnetic material and lead-in wire 3, it is characterized in that, on described iron core 2 disc solids, be shaped with symmetrical core center cylinder both sides, regulate the characteristic adjustment hole 4 of inductance size and away from described core center post, pass hole 5 perpendicular to the lead-in wire of described characteristic adjustment hole 4 lines of centres, coil combination pierces into core center post, and coil enters end and output connection and from going between, passes hole 5 and draw.

The utility model has following effect than prior art.

The utility model adopts and make characteristic adjustment hole 4 on iron core 2 disc solid, has facilitated debugging, makes the debugging of inductance characteristic simple and convenient.The coil combination that forms band lead-in wire is tied up in insulation, goes between solid reliable.Whole small product size little except lead-in wire profile be not more than Φ 13 * 6mm ², lightweight, only two of machined part simple in structure.As inductance suitable can in addition, can form the inductance type proximity transducer of stand-alone product, than the similar proximity transducer of prior art, it is little many that volume is all wanted.

Accompanying drawing explanation

Fig. 1 is the cut-open view of the utility model micro electric Sensor.

Fig. 2 is the vertical view of Fig. 1.

Fig. 3 is coil rack structure cutaway view.

In figure: 1. coil combination, 2. iron core, 3. lead-in wire, 4. characteristic adjustment hole, 5. lead-in wire fairlead, 6. coil lead outlet.

Embodiment

Below in conjunction with drawings and Examples, further illustrate the utility model, but therefore the utility model is not limited among described scope of embodiments.

As Fig. 1.Micro electric Sensor is mainly comprised of 2, one coil combination of iron core 1 with axle circle hull shape.Iron core 2 is made by soft magnetic material.The opening surface of columniform iron core 2 is induction end faces of sensor, and is origin or beginning or the terminal of measuring distance between tested object and sensor.On iron core 2 disc solids, have large and small each two holes, macropore is for regulating the tooling hole of inductance size use, being called adjustment hole 4, for the size of regulating winding outputting inductance.Adjustment hole 4 is symmetrical in core center cylinder both sides.Two apertures, for lead-in wire passes hole 5, go between and pass hole 5 away from core center post, and the two aperture lines of centres are perpendicular to two adjustment hole 4 lines of centres.Away from described core center post, the lead-in wire of vertical described characteristic adjustment hole 4 lines of centres passes hole 5, by enameled wire row around the coil combination on skeleton, at coil turn, reach after the setting that the working clearance is 2.15mm, output 5mH inductance, welding lead insulating is tied up, the coil combination that forms band lead-in wire, coil combination pierces into core center post, and coil enters end and output connection and from going between, passes hole 5 and draw.

Coil combination 1 is that enameled wire is wound on shown in Fig. 3 on skeleton, coil turn is to determine by calculation and test, when the coil turn of built-up coil combination 1 is 400 multiturn, comparatively suitable, after the number of turn reaches, coil is entered to end and go out the end lead-in wire of burn-oning, insulation is tied up the carrying out insulation that forms band lead-in wire and is tied up and form the coil combination that band goes between.After iron core 2 combinations, utilize inductance bridge tester to observe, by adjustment hole 4, the relative position of regulating winding combination and iron core, adjustablely go out to respond to the about 2.15mm of end face and target distance, inductance is the value of about 5mH, with insulating gel, the definite relative position of coil and iron core is fixed to formation micro electric Sensor.

Principle of the present utility model is: inductance sensor is according to classical theory research and development, when electric current is flowed through conductive coil, at coil, will produce magnetic field around.The coil combination of this product is the magnetic source that produces magnetic field, and iron core is to make the magnetic conductor that in magnetic field, magnetic induction density increases.For the feature of this miniature proximity transducer, physical dimension is little, the specific about 2.15mm measuring distance of air-gap and generation specific inductance value (5mH).Except lead-in wire, the profile of micro electric Sensor is not more than Φ 13 * 6mm ².

Claims

1. a micro electric Sensor, comprise coil combination (1), the iron core of being made by soft magnetic material (2) and lead-in wire (3), it is characterized in that, on described iron core (2) disc solid, be shaped with symmetrical core center cylinder both sides, regulate the characteristic adjustment hole (4) of inductance size and away from described core center post, pass hole (5) perpendicular to the lead-in wire of described characteristic adjustment hole (4) line of centres, coil combination pierces into core center post, and coil enters end and output connection and from going between, passes hole (5) and draw.

2. micro electric Sensor according to claim 1, it is characterized in that, by a magnetic conductive metal, made, with the round hull shape iron core of axle, opening surface is the induction end face of sensor, and is origin or beginning or the terminal of measuring distance between tested object and sensor.

3. micro electric Sensor according to claim 1, is characterized in that, the coil turn of coil combination (1) is 400 multiturns.

4. micro electric Sensor according to claim 1, is characterized in that, the coil of coil combination enters end and goes out to hold the lead-in wire of burn-oning, and ties up the coil combination that forms band lead-in wire by insulation.

5. micro electric Sensor according to claim 1, is characterized in that, independently the profile of micro electric Sensor is not more than Φ 13 * 6mm ².