CN2264970Y

CN2264970Y - Magnetic-control precision memory switch

Info

Publication number: CN2264970Y
Application number: CN 96235678
Authority: CN
Inventors: 黄林春; 王磊
Original assignee: Individual
Current assignee: Huang Linchun
Priority date: 1996-05-17
Filing date: 1996-05-17
Publication date: 1997-10-15
Anticipated expiration: 2006-05-17

Abstract

The utility model discloses a precise magnetic control memory switch. In the utility model, a contact position of a reed pipe 4 is provided with a holding magnet steel 5, and the polarity of an executive magnet steel 7 installed on a controlled device 8 is mutually vertical with the polarity of the holding magnet steel 5. The utility model has the advantages of better interference immunity and higher reliability, the utility model can detect the tiny angle range of the controlled device, and the utility model can especially display unique advantages of the utility model for controlling miniature precise devices.

Description

Accurate magnetic control memory switch

The utility model belongs to a kind of memory switch by magnetic force control.

The reed capsule switch is a device commonly used in the industrial automation Control Engineering.Chinese patent 93245244.2 discloses a kind of " anti-interference noncontact memory switch ", improves to some extent though this memory switch compares proximity switch commonly used, but still has many shortcoming and defect, and its range of application is limited to.For example when need detecting the angle stroke of certain controlled plant (referring to Fig. 1), because of its switch itself oversize, and be fixed on outer steel on the controlled plant when must axially parallel passing through the center line 00 ' of switch this switch could move and send signal.Therefore, when the rotational angle α of controlled plant was no more than 00 ', this switch was with regard to akinesia, even the phenomenon that occurs interfering with each other, and especially in miniature precision equipment, this switch can't normally use.

The purpose of this utility model is exactly the deficiency that exists in the above-mentioned background technology for overcoming, and provides a kind of simple in structure, reliable and stable and can measure the accurate magnetic control memory switch of angle stroke.

The technical solution that realizes above-mentioned purpose is: keep magnet steel to be fixed on outside the reed capsule at two spring contact places, and pole orientation is parallel with reed capsule, the pole orientation of carrying out magnet steel is orthogonal with the pole orientation that keeps magnet steel.Keeping magnet steel is the outer wall that the bonding or loop overlapping shape of strip and block is socketed in reed capsule.The execution magnet steel is fixed on the relevant position of controlled plant, and its magnetic field intensity greater than the 2-15 that keeps magnet steel doubly.The lead-out wire at reed capsule two ends is connected on the binding post.

Fig. 1: the structure principle chart of correlation technique.

Fig. 2: structural representation of the present utility model.

Fig. 3: embodiment schematic diagram of the present utility model.

As shown in Figure 2, this memory switch has a housing 3, reed capsule 4 is positioned at housing 3, and the contact place of two reeds 6 strip that is adhesively fixed keeps magnet steel 5 or socket one annular retaining magnet steel 5 outside reed capsule 4, this keep magnet steel 5 polarity should with reed capsule 4 parallel longitudinals.The exit of two reeds 6 is connected with binding post 1 on the terminal block by lead 2.Than keeping the big 2-15 of magnet steel 5 magnetic field intensitys execution magnet steel 7 doubly to be fixed on the controlled plant 8 with reed capsule 4 relevant positions, its polarity is orthogonal with the polarity that keeps magnet steel 5.This switch can be fixed on the checkout equipment by fixing hole 9.

If keep magnet steel 5 and execution magnet steel 7 polarity such as Fig. 2 to arrange:

Keep magnet steel 5 near reed capsule 4 contacts, to form a Weak magentic-field, reed 6 is under its magnetic field graviational interaction.When execution magnet steel 7 moves from bottom to top and passes through the axis of reed capsule 4, strengthened the right side S pole field intensity that keeps magnet steel 5 owing to carry out the lower end S utmost point of magnet steel 7, strengthen by the magnetic field that keeps magnet steel 5 to form near making reed capsule 4 contacts, attraction increases, so junction closure, constitute closed magnetic force loop, magnetic resistance is very little, thereby makes the magnetic field gravitation that keeps magnet steel 5 generations greater than the elastic force between two reeds 6.Therefore, move even carry out in magnet steel 7 continuation, two reeds still can be kept closed, and have remembered the direction of motion (making progress) and the move distance (passing through axis) of carrying out magnet steel 7.When execution magnet steel 7 moves from the top down and passes through the axis of reed capsule 4, maintenance magnet steel 5 right side S pole field intensity have been slackened owing to carry out the upper end N utmost point of magnet steel 7, make and weaken by the magnetic attraction that keeps magnet steel 5 to form near reed capsule 4 contacts even disappear, two reeds 6 are under elastic force effect own, and contact disconnects.At this moment, even carrying out magnet steel 7 continues to move down, recover near reed capsule 4 contacts by the Weak magentic-field that keeps magnet steel 5 to form, this magnetic field intensity is not enough to overcome the elastic force of two reeds 6 itself, two reeds 6 keep off-state, have remembered execution magnet steel travel direction (downwards) and move distance (passing through axis)

Fig. 3 shows an embodiment of the present utility model.Two this memory switch A, B are pressed required angle setting at grade, when controlled plant 8 rotates very little angle [alpha] with execution magnet steel 7, because the interaction of carrying out magnet steel 7 and keeping magnet steel 5, switch A promptly sends the signal that controlled plant 8 begins to rotate, and switch B then sends controlled plant 8 signal of rotational angle.

The utility model has overcome the deficiency described in the background technology, because of near the reed capsule contact By keeping magnet steel to form a magnetic field, its anti-interference is better, and reliability is higher, and cost, Volume reduces, and can detect the small angle of controlled plant stroke, and the accuracy height is established at miniature precision In the standby control, especially can show the advantage that it is unique.

Claims

1, a kind of accurate magnetic control memory switch, comprise a reed capsule (4), it is characterized in that keeping magnet steel (5) to be fixed on outside the reed capsule (4) at two reeds (6) contact place, and pole orientation is parallel with reed capsule (4), carries out the pole orientation and the orthogonal setting of pole orientation that keeps magnet steel (5) of magnet steel (7).

2, memory switch as claimed in claim 1 is characterized in that said maintenance magnet steel (5) is socketed in the outer wall of reed capsule (4) for the bonding or loop overlapping shape of strip and block.

3, memory switch as claimed in claim 1 is characterized in that carrying out the relevant position that magnet steel (7) is fixed on controlled plant (8), and its magnetic field intensity greater than the 2-15 that keeps magnet steel (5) doubly.

4, memory switch as claimed in claim 1 is characterized in that the lead-out wire (2) at reed capsule (4) reed (6) two ends is connected on the binding post (1).