CN1657338B

CN1657338B - Adjustable headlight

Info

Publication number: CN1657338B
Application number: CN 200410005471
Authority: CN
Inventors: 李国伟; 程凯; 陈凤东
Original assignee: Johnson Electric SA
Current assignee: Dechang Electric Machinery Jiangmen Co ltd
Priority date: 2004-02-19
Filing date: 2004-02-19
Publication date: 2011-05-04
Anticipated expiration: 2024-02-19
Also published as: CN1657338A

Abstract

An adjustable head light is composed of a casing, a lamp unit rotary in the casing, a piezoelectric motor, and a slide unit between said motor and lamp unit for turning the lamp unit.

Description

Adjustable head lamp

Technical field

The present invention relates to especially but be used for adjustable head lamp of power actuated vehicle not exclusively.

Background technology

Known adjustable head lamp uses PMDC micro-motor and worm screw or gear unit to regulate the angle of lamp unit with respect to its shell.These devices are noisy relatively, and have the limited life-span.

Summary of the invention

According to the invention provides a kind of adjustable head lamp, it comprises lamp housing, in lamp housing pivotable lamp unit, piezo-electric motor and between motor and lamp unit the bonded assembly slider, be used for respect to lamp housing pivot lamp unit.

This piezo-electric motor is quieter and have the longer life-span than traditional PMDC motor.In addition, this head lamp unit can be made for that compactness and physical construction are simpler more than adjustable head lamp of known use PMDC micro-motor.

This piezo-electric motor preferably includes the steel core of rectangle and is attached to ceraminator at least one side of this steel core, this piezoelectric element or each piezoelectric element have first and second, first face is divided into four quadrants that covered by the quadrant electrode, and second mask has the single public electrode that electrically contacts with this steel core, and this quadrant electrode is connected to and makes that relative quadrant centering is worked at the diagonal angle.

Advantageously, the quadrant electrode that two diagonal angles are relative forms single electrode by the whole connecting strap of process between another is to electrode.

This piezo-electric motor preferably has each ceraminator of two opposite sides being attached to actuator.

This sandwich structure makes motor more reliable for high power applications.

According to an aspect of of the present present invention, a kind of adjustable head lamp is provided, it comprises lamp housing, in lamp housing pivotable lamp unit, piezo-electric motor and between motor and lamp unit the bonded assembly slider, this slider is used to make the lamp unit to pivot with respect to lamp housing.

According to of the present invention one preferred aspect, this piezo-electric motor comprises motor case and the actuator that is supported by motor case, the steel core of the promising rectangle of this actuating device and be attached to ceraminator at least one side of this steel core, described piezoelectric element has first and second, first face is divided into four quadrants that covered by the quadrant electrode, and second mask has the single public electrode that contacts with this steel core copper electrocardio, and this quadrant electrode is connected to and makes that relative quadrant centering is worked at the diagonal angle.

Of the present invention another preferred aspect in, the relative quadrant electrode in two diagonal angles forms single electrode by the whole connecting strap of process between another is to electrode.

Of the present invention another preferred aspect in, this piezo-electric motor has each ceraminator of two opposite sides being attached to this steel core.

Of the present invention another preferred aspect in, this actuator remains in the motor case by flexible support members.

Of the present invention another preferred aspect in, this steel core has the driving top of stretching out from an one end face, is used to drive this slider.

Of the present invention another preferred aspect in, action of the spring drives the described end face opposing end faces that the top contacts with slider this steel core with being used to impel.

Of the present invention another preferred aspect in, this steel core has four sides and two end faces, four described ceraminators are attached to corresponding each side of this steel core respectively, so that actuator can be regulated head lamps around two orthogonal axis.

Of the present invention another preferred aspect in, this steel core has four sides and two end faces, four described ceraminators are attached to each respective side of this steel core respectively, so that actuator can be regulated head lamps around two orthogonal axis.

Description of drawings

Also come more specifically to describe the present invention with reference to the accompanying drawings by example now, wherein:

Fig. 1 is the vertical cross-section that intercepts among the embodiment according to adjustable head lamp of the present invention,

Fig. 2 is the lateral plan of magnification ratio of the piezo-electric motor of the head lamp among Fig. 1,

Fig. 3 is the transparent view of magnification ratio of the actuator of the motor that shows among Fig. 2, and

Fig. 4 a and 4b show the mode of operation of actuator.

The specific embodiment

At first with reference to figure 1, wherein adjustable head lamp of Xian Shiing comprise lamp housing 10, the lamp unit 11 in lamp housing 10, installed pivotly around spherical contact 12, by Connection Element 14 be connected to the piezo-electric motor 13 of lamp housing 10 and between motor 13 and lamp unit 11 bonded assembly slider 15, be used for centering on spherical contact 12 with respect to lamp housing 10 pivot lamp unit 11.

With reference now to Fig. 2,, motor 13 comprises motor case 16 and is supported on actuator 17 in the motor case 16 by eight flexible support members that adopt the form of rubber blocks 18.

Show well that in Fig. 3 this actuator 17 comprises the rectangle steel core 19 with square-section, it has from driving top 20 of extending placed in the middle, the upper end of the heart 19.This top 20 can form by the processing heart 19.Each of two major opposing sides of the heart 19 is covered by ceramic component 21.Each element 21 is bonding or be attached to each side of steel core 19 in addition.

The front of each element 21 is divided into four quadrants 22,23,24 and 25, and each quadrant is covered by the quadrant electrode.The relative quadrant electrode 23,25 in a pair of diagonal angle comes physically with electrically to be connected by short and narrow connecting strap 26, and another electrode pair 22,24 links together by wire jumper (less than demonstration).

The back of each element 21 is covered by single ground electrode (not showing).The ground electrode of two ceramic components 21 is electrically connected by steel core 19.

Slider 15 supports against bearing 27 in motor case 16, and slidably moving at its longitudinal direction, and slider 15 has ball-shaped end 30, is used to be connected to lamp unit 11.

Impel the driving top 20 of actuator 17 to contact by the spring 28 that acts on actuator 17 with slider 15 away from the end that drives top 20.Can provide the regulating control 29 of screw spiral to come preloading of regulating spring 28.

With reference now to Fig. 4, the work of actuator is described.When the excitation piezoelectric ceramic, its stretching, extension.By the quadrant of exciting element 21, this quadrant stretches.By optionally encouraging the relative quadrant in diagonal angle, element 21 bending owing to unperturbed adjacent quadrant.Cause the bending of actuator 17 by crooked two elements 21 on identical direction.

In this preferred embodiment, encourage the relative quadrant in diagonal angle 23,25 with sine waveform, to cause distortion as shown in Figure 4, wherein, voltage is high and is positive, has returned to when voltage is low normal (state that perhaps loosens, shown in dotted line).When voltage be high and be bear the time, the quadrant that is energized 23,25 shrinks or shortens to such an extent that react soon than spring 28, cause that like this driving top 20 leaves from slider 15, and actuator 17 is in other direction bending (as to the right observed).

When being operated in mode of resonance following time, actuator moves preferably.Just cause near actuator 17 vibration or when stretching, actuator moves the preferably natural frequency of its resonance or fundamental frequency when the frequency of excitation waveform.Node or zone that the synthetic vibration of actuator 17 will provide minimum lateral to move on the surface of actuator 17, wherein, rubber mounting blocks 18 can elasticity keep and support actuator 17, and does not stop actuator vertical shake and mobile.

In the actuator that assembles, encourage two elements 21 similarly simultaneously, thereby cause steel core 19 crooked and stretching, extensions, as the demonstration of in Fig. 4, amplifying.Stretching, extension causes that driving top 20 moves up, and bending causes that driving top 20 moves to left, and is as directed.Moving in the opposite direction promptly, upwards and to the right, will be realized electrode by on the excitation ceramic component 21 another.

By suitable electron steering, for example by using electronic switch to control the cycle life of the sinusoidal signal that is applied to actuator 17, this actuator can be realized the multi step format adjusting of head lamp with fine resolution.

Steel core 19 can be the cube with four sides and two end faces, and each ceraminator is attached to four sides each.Then, actuator can be crooked in two different directions, to allow regulating head lamp around two orthogonal axis.

The above embodiments just provide by example, are not departing under the scope situation of the present invention that is limited by the accompanying Claim book, and various improvement for those skilled in the art clearly.

Claims

1. adjustable head lamp, it comprises lamp housing, in lamp housing pivotable lamp unit, piezo-electric motor and between motor and lamp unit the bonded assembly slider, this slider is used to make the lamp unit to pivot with respect to lamp housing.

2. adjustable head lamp as claimed in claim 1, it is characterized in that: this piezo-electric motor comprises motor case and the actuator that is supported by motor case, the steel core of the promising rectangle of this actuating device and be attached to ceraminator at least one side of this steel core, described piezoelectric element has first and second, first face is divided into four quadrants that covered by the quadrant electrode, and second mask has the single public electrode that electrically contacts with this steel core, and this quadrant electrode is connected to and makes that relative quadrant centering is worked at the diagonal angle.

3. adjustable head lamp as claimed in claim 2 is characterized in that: the relative quadrant electrode in two diagonal angles forms single electrode by the whole connecting strap of process between another is to electrode.

4. as claim 2 or 3 described adjustable head lamps, it is characterized in that: this piezo-electric motor has each ceraminator of two opposite sides being attached to this steel core.

5. as claim 2 or 3 described adjustable head lamps, it is characterized in that: this actuator remains in the motor case by flexible support members.

6. as claim 2 or 3 described adjustable head lamps, it is characterized in that: this steel core has the driving top of stretching out from an one end face, is used to drive this slider.

7. adjustable head lamp as claimed in claim 6 is characterized in that: action of the spring drives the described end face opposing end faces that the top contacts with slider this steel core with being used to impel.

8. as claim 2 or 3 described adjustable head lamps, it is characterized in that: this steel core has four sides and two end faces, four described ceraminators are attached to each side of this steel core respectively, so that actuator can be regulated head lamp around two orthogonal axis.

9. adjustable head lamp as claimed in claim 7, it is characterized in that: this steel core has four sides and two end faces, four described ceraminators are attached to each side of this steel core respectively, so that actuator can be regulated head lamp around two orthogonal axis.