CN2439666Y

CN2439666Y - Electromagnetic miniature vibration sensor

Info

Publication number: CN2439666Y
Application number: CN 00222615
Authority: CN
Inventors: 熊一心
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-03-27
Filing date: 2000-03-27
Publication date: 2001-07-18
Anticipated expiration: 2010-03-27

Abstract

The utility model relates to a miniature vibration sensor. The upper part of a plastic frame is provided with coils, and a steel component can be placed in an inner cavity of the lower part of the plastic frame. Magnet steel is arranged on the upper side of the steel component or arranged in an upper frame. The steel component is connected with the lower part of the frame in an elastic mode by an elastic body. The coils on the bottom can lead out support feet or a flaky extraction structure. Vibration signals can be transferred to the steel component, etc., following vibration by the elastic body, and the coils can output variation electric quantity by the variation of magnetic flux. Compared with the traditional electromagnetic type, the utility model can realize integration of components and reduces volume (to 10MM *10MM *15MM). The utility model has the advantages of simple structure, easy installation, adjustable output, no direction, reliable performance, low-frequency stage and high sensitivity, and can be used in alarm devices of all products needing protection, such as automotive vehicles, doors, windows, strongboxes, etc.

Description

Electromagnetic type small vibrating sensor

The utility model relates to a kind of electromagnetic type small vibrating sensor, belongs to electromagnetic sensor, is used for motor vehicle, door and window, safety cabinet etc. and is essential and takes precautions against the warning device of product.

At present the domestic supporting vibration transducer of antitheft equipment that is used for adopts electro-mechanical principle more, and piezoelectric principle is made, and it is big to exist volume, installs inconveniently, exports non-adjustablely, and directivity is arranged, low-frequency range poor sensitivity, defective such as performance is unreliable.Chinese patent " the passive servo formula is toward the multi-functional vibro-pickup of physical pendulum " (ZL90204993.3, CN2064503) adopt the light pendulum of the passive servo technology and the reciprocating type high natural frequency of vibration to combine, can be lower than the big amplitude measurement of low frequency of the natural frequency of vibration and expand the high frequency measurement scope, its shortcoming is that volume is big, is mainly used in the measurement earthquake.

This practical parental type purpose provides a kind of novel vibration transducer that non electrical quantities such as displacement, speed, acceleration, vibration can be changed into electric weight output, and to have a volume little, simple in structure with like product ratio in the past, easy for installation, the output scalable, non-directional, low-frequency range is highly sensitive.

Electromagnetic type small vibrating sensor, it is characterized in that being provided with an insulation framework 1, its top is right cylinder, coil 2 of right cylinder outside surface coiling, the skeleton bottom is the cylinder that internal cavity is arranged, and establishes a right cylinder steel part 4, places internal cavity, if a right cylinder magnet steel 3 is close to steel part 4 upper surfaces or is close to skeleton upper cylinder bore area; And establish elastic body 5, its inner ring muscle and outward flange muscle are placed in cylinder 1.2 outside surfaces below steel part 4 and the skeleton respectively.Skeleton bottom coil is drawn and is adopted two column legs or sheet deriving structure.

Description of drawings:

Fig. 1: the utility model front elevation

Fig. 2: Figure 1A-A cut-open view (embodiment 1)

Fig. 3: Figure 1A-A cut-open view (embodiment 2)

Fig. 4: spring part 5 structural drawing

Embodiment 1: see Fig. 1, Fig. 2, sensor has plastic skeleton 1, and top is right cylinder 1.1, is with a coiling 2 outward, and the skeleton bottom is the tetrahedron 1.2 that internal cavity is arranged.Right cylinder steel part 4 places internal cavity, and right cylinder magnet steel 3 is close to steel part 4 upper surfaces.See Fig. 2, Fig. 4, elastic body 5 is made up of inner ring muscle 5.1 and outward flange muscle 5.3 and four radial drawing muscle 5.2 being connected both.The recessing 4.1 and 1.3 respectively of steel part 4 and skeleton tetrahedron 1.2 outside surfaces, elastic body inner ring muscle 5.1 and outward flange muscle 5.3 are enclosed within respectively in groove 4.1 and 1.3.See Fig. 1, Fig. 2, two metal lead wires 2.1 of coil are embedded in the skeleton fluting 1.6, and its bottom is drawn and can be adopted following dual mode: first kind, be embedded with lead-in wire 2.1 places, if two metal legs 2.3 are drawn, establish two plastics guiding pin 1.4 (see figure 1)s in another relative direction simultaneously.Second kind: adopt two sheet metal sheets 2.2 of being close to the skeleton lower surface to draw (seeing Fig. 1, Fig. 2), sheet metal 2.2 is connected available joint construction with skeleton.Adopt this sheet deriving structure to realize to be the plane in the electronic circuit to mount.Right cylinder 1.1 baffled 1.5 on the skeleton 1.Sensor bulk is 10mm * 10mm * 15mm.

Embodiment 2: see Fig. 3, when magnet steel 3 places when being close to skeleton 1 upper cylinder 1.1 bore areas, cone 4.2 is adopted on right cylinder steel part 4 tops, and all the other structures and embodiment 1 are identical.

The course of work: vibration transducer is contained on the alarm circuit plate, alarm is contained on the products such as motor vehicle, door and window, safety cabinet, when the thief prizes the lock of car, door and window, cabinet, produce mechanical vibration, elastic body 5 vibrates thereupon in the sensor, its inner steel piece 4 or steel part 4 and magnet steel 3 etc. are in company with vibration, make in the telefault magnetic field that coil 2 and magnet steel 3 form, magnetic flux change makes the coil electric weight that changes, and draw by the coil deriving structure, deliver to warning circuit and send warning.

The utility model advantage: 1, overcome the fragile problem of general electromagnetic sensor moving component. 2, owing to coil, magnet steel, steel part, skeleton four sectoral integrations, solved traditional electrical magnetic-type sensing The bulky problem of device, realize volume little (10mm * 10mm * 15mm), simple in structure, installation side Just. 3, output can regulate, non-directional, dependable performance. 4, low-frequency range is highly sensitive. 5, Cell winding can realize that with bottom sheet deriving structure the plane in the electronic circuit mounts.

Claims

1, electromagnetic type small vibrating sensor, it is characterized in that being provided with an insulation framework (1), its top is right cylinder (1.1), a coil of right cylinder outside surface coiling (2), the skeleton bottom is the cylinder (1.2) that internal cavity is arranged, if a right cylinder steel part (4) places internal cavity, if a right cylinder magnet steel (3) is close to steel body (4) upper surface or is close to skeleton upper cylinder (1.1) bore area, and establish elastic body (5), its inner ring muscle and outward flange muscle are placed in steel part (4) and skeleton bottom cylinder (1.2) surface respectively.

2, by the described sensor of claim 1, it is characterized in that establishing the radial drawing muscle (5.2) that is connected both between elastic body (5) inner ring muscle (5.1) and outward flange muscle (5.3), and in steel part (4) and skeleton bottom cylinder (1.2) outside surface recessing, be inserted in elastic body respectively.

3, by the described sensor of claim 1, it is characterized in that magnet steel (3) is close to skeleton upper cylinder (1.1) bore area, steel part (4) top is cone (4.2).

4, by the described sensor of claim 1, it is characterized in that (2) two metal lead wires of coil (2.1) are embedded in the skeleton fluting (1.6), its bottom is drawn and is used following dual mode: locate being embedded with lead-in wire (2.1), if two metal legs (2.3) are drawn, establish two plastics guiding pin (1.4) in another relative direction simultaneously; Perhaps adopt two sheet metal sheets (2.2) of being close to the skeleton lower surface to draw, i.e. the sheet deriving structure.

5, by the described sensor of claim 1, it is characterized in that sensor bulk is 10mm * 10mm * 15mm.

6,, it is characterized in that upward right cylinder (1.1) baffled (1.5) of skeleton (1) by the described sensor of claim 1.