The utility model content
The utility model aim to provide a kind of simple in structure, the contact that puts in place is reliable, the liquid crystal display location switch of the accurate in-car TV machine in location.
The technical solution of the utility model is: the liquid crystal display location switch of in-car TV machine comprises the bottom of a captive joint liquid crystal display and is fixed on swinging strut on the motor output shaft; The axial lateral surface of this swinging strut has the acting arm of an outward extending conducting boss as this switch; The below of conducting boss is provided with the frame that rigidly fixes that an insulating material makes, and two conductive plates of this fixed mount upper surface fixed installation are as two fixed contacts of this switch; Two conductive plates lay respectively at the both sides of swinging strut axis, cooperate the common rotational angle range that limits swinging strut with conducting boss, liquid crystal display is conductive plate of conducting boss contact when opening the state that puts in place, and liquid crystal display another conductive plate of conducting boss contact when closing the state that puts in place; Fixed mount and motor all are fixed on the vision receiver body.
For increasing the mechanical strength of conducting boss: described conducting boss is fan-shaped boss, and two inclined-plane is respectively among two conductive plates one contact surface.
In the embodiment that optimizes: described fixed mount upper surface be positioned at the orthogonal projection of conducting boss path of motion under half be recessed step, establish the non-conductive shock pad between the step upper surface that this is recessed and two conductive plates.
In the embodiment of special recommendation: described swinging strut and conducting boss thereof are that aluminum alloy is integrated, are provided with the interior cover of a steel between swinging strut and the motor output shaft; The peripheral dimension of interior cover matches with the shaft hole of swinging mounting, and interior all sizes match with the output shaft of motor.
The output shaft ground connection of described motor.
The liquid crystal display location switch of the utility model in-car TV machine utilizes the acting arm of the outward extending conducting boss of the axial lateral surface of swinging strut as this switch; The below insulating material of conducting boss is made rigidly fixes two fixed contacts of hard-wired two conductive plates of frame upper surface as this switch; Conductive plate, fixed mount and swinging strut are that the material of rigidity is made, and intensity can tolerate bigger impact well; Angle orientation directly guarantees the accurate positioning that rigidity cooperates by the working accuracy of above-mentioned part and has avoided the assembly error of monomer-type switch, guaranteed that from structure each parts can not become flexible and be shifted under the usage condition of Vehicular vibration, the accurate positioning raising, the contact more reliable.The fixed mount of rigidity limits swinging strut and can only rotate in fixing angular range, and swinging strut puts the back conducting boss in place by the output torque of corresponding conductive plate to fixed mount transmission DC machine.Swinging strut is subjected to the restriction of fixed mount under abnormal condition such as DC machine is out of control, and the output torque of rotating motor when being obstructed all acts on fixed mount, makes unusual output torque effect can not be diffused into liquid crystal display, also protects other parts of complete machine.In the embodiment that optimizes, by between the recessed step upper surface in fixed mount upper surface place and two conductive plates, establishing the non-conductive shock pad, conducting boss was to the impact of corresponding conductive plate after the minimizing swinging strut put in place, elasticity by shock pad has increased the reliability that conducting boss contacts with corresponding conductive plate again, can be chosen in simultaneously and making motor be rotated further a minor time slice a little after upset puts in place to stop again, eliminate the gap that each rotating mechanism produces, do not rock after liquid crystal display is put in place.Thereby save the hold-fast body that generally uses in the liquid crystal display switching mechanism of general in-car TV machine.Therefore, the utility model can overcome the above shortcoming of original technology, and have simple in structure, the contact that puts in place is reliable, locate accurate advantage.In the embodiment of special recommendation, aluminum alloy is integrated, and to have a general plastic product of swinging strut intensity ratio of conducting boss good, and the interior cover of steel can increase the joint face between swinging strut and the motor output shaft, improves durability.The output shaft ground connection of motor particularly, the interior cover of steel has served as the connection lead between conducting boss and the ground, and the conducting boss of motion does not need to connect in addition the lead of motion, and electrical connection is simple.
The specific embodiment
The embodiment deployed configuration of an optimization of liquid crystal display location switch of the utility model in-car TV machine, as shown in Figure 1.The liquid crystal display location switch of this in-car TV machine is by forming with lower member: open the detection lug 1 that puts in place, the conducting boss 52 on detection lug 2, fixed mount 3, shock pad 4 and the swinging strut 5 of putting in place of closing.
Opening the detection lug 1 that puts in place is the conductive plate that adopts rustless conductive material to make, and in order to be fixed on the fixed mount 3, its waist is provided with two screw via holes 11.Open the switch fixed contact that puts in place as liquid crystal display, its end is opened the test side that puts in place by flex lead with the liquid crystal display of in-car TV machine control desk and is connected.
The detection lug 2 that puts in place of closing is the conductive plates that adopt rustless conductive material to make, and in order to be fixed on the fixed mount 3, its waist is provided with two screw via holes 21.As the switch fixed contact that liquid crystal display closes and puts in place, its end is connected by the close test side that puts in place of the flex lead and the liquid crystal display of in-car TV machine control desk.
Fixed mount 3 is the rigid supports that adopt insulating material to make, and half of its upper surface 31 is recessed step 32.Second half of fixed mount 3 upper surfaces 31, rear side is in order fixedly to open the detection lug 1 that puts in place, and two screw via holes 11 that correspondence is opened the detection lug 1 that puts in place are provided with two screws 33; The front side is for the detection lug 2 that puts in place that fixedly closes, and close put in place two screw via holes 21 of detection lug 2 of correspondence are provided with two screws 34.
Shock pad 4 adopts resilient insulating material to make.
During preliminary assembling, will open the detection lug 1 and closing of putting in place the detection lug 2 that puts in place with screw and be fixed on after the upper surface 31 of fixed mount 3, be opened detection lug 1 and the closing detection lug 2 that puts in place that puts in place of shock pad 4 is pressed in step 32 upper surfaces on the fixed mount 3.
Swinging strut 5 is that aluminum alloy is integrated, and its pivot center place has a shaft hole 51 that is roughly rectangle.Swinging strut 5 axial lateral surfaces have the acting arm of an outward extending conducting boss 52 as this switch; Conducting boss 52 is fan-shaped boss, the inclined-plane of its rear side 521 for and the contact surface of opening the detection lug 1 that puts in place, the inclined-plane 522 of its front side for the contact surface of detection lug 2 of putting in place that closes.Swinging strut 5 outer radial periphery faces have an outward extending liquid crystal display connecting portion 53, are used for fixing the bottom that connects liquid crystal display.
The interior cover 6 of a steel is installed between the output shaft 71 of the shaft hole 51 of swinging strut 5 and motor 7, and swinging strut 5 is fixed on the output shaft 71 of motor 7.The peripheral dimension of interior cover 6 matches with the shaft hole 51 of swinging mounting 5, and interior all sizes match with the output shaft 71 of motor 7.
Motor 7 is the DC speed-reducing that are made of DC machine and drop-gear box, is installed in the motor erecting frame 8, and motor erecting frame 8 is fixed on the adapter plate 9 of vision receiver body rear end.Fixed mount 3 is fixedly installed to output shaft 71 1 sides of motor 7 on the adapter plate 9, the below of the conducting boss 52 of swinging strut 5 when formal assembling.Detection lug 1 and the closing detection lug 2 that puts in place that puts in place of opening on the fixed mount 3 lays respectively at the both sides of swinging strut 5 axis, under the conducting boss 52 path of motion orthogonal projection that recessed step 32 and shock pad 4 are positioned at swinging strut 5 on the fixed mount 3.Detection lug 1 and the closing detection lug 2 that puts in place that puts in place of opening on the fixed mount 3 cooperates the rotational angle range of qualification swinging strut 5 jointly with conducting boss 52.
Liquid crystal display is when closing the state that puts in place, as shown in Figure 2.The liquid crystal display connecting portion 53 of swinging strut 5 is roughly parallel with adapter plate 9, and liquid crystal display is also roughly parallel with adapter plate 9.Put in place the upper surface of detection lug 2 of closing on the inclined-plane 522 contact fixed mounts 3 of conducting boss 52 front sides.The inclined-plane 521 of conducting boss 52 rear sides is away from put in place the upper surface of detection lug 1 of opening on the fixed mount 3.Because the output shaft 71 of motor 7 is ground connection in advance, the close test side current potential that puts in place of corresponding liquid crystal screen is a zero level on the in-car TV machine control desk, and liquid crystal display to open the test side current potential that puts in place be high level.
In the time of need opening liquid crystal display, the direction that in-car TV machine control desk control motor 7 output shafts 71 driven in rotation supports 5 are opened to liquid crystal display is rotated.When swinging strut 5 is in the motion process as shown in Figure 3, liquid crystal display is in the motion intermediateness; Detection lug 1 and the closing detection lug 2 that puts in place that puts in place of opening on the fixed mount 3 is all separated to form with conducting boss 52 and is opened circuit, the close test side current potential that puts in place of corresponding liquid crystal screen is a high level on the in-car TV machine control desk, and liquid crystal display is opened the test side current potential that puts in place and also is high level.When forwarding roughly the liquid crystal display vertical with adapter plate 9 to, swinging strut 5 opens when putting in place as shown in Figure 4 the upper surface of opening the detection lug 1 that puts in place on the inclined-plane 521 contact fixed mounts 3 of conducting boss 52 rear sides.The close test side current potential that puts in place of corresponding liquid crystal screen is a high level on the in-car TV machine control desk, and liquid crystal display to open the test side current potential that puts in place be low level, illustrate that the liquid crystal display upset puts in place, in-car TV machine control desk is controlled motor 7 and is stopped operating.
In the time of need closing liquid crystal display, in-car TV machine control desk control motor 7 output shafts 71 driven in rotation supports 5 rotate to the direction that liquid crystal display closes.When swinging strut 5 is in the motion process as shown in Figure 3, liquid crystal display is in the motion intermediateness; Detection lug 1 and the closing detection lug 2 that puts in place that puts in place of opening on the fixed mount 3 is all separated to form with conducting boss 52 and is opened circuit, the close test side current potential that puts in place of corresponding liquid crystal screen is a high level on the in-car TV machine control desk, and liquid crystal display is opened the test side current potential that puts in place and also is high level., closes when putting in place as shown in Figure 2 swinging strut 5 put in place the upper surface of detection lug 2 of closing on the inclined-plane 522 contact fixed mounts 3 of conducting boss 52 front sides when forwarding roughly the liquid crystal display parallel with adapter plate 9 to.The inclined-plane 521 of conducting boss 52 rear sides is away from put in place the upper surface of detection lug 1 of opening on the fixed mount 3.The close test side current potential that puts in place of corresponding liquid crystal screen is a zero level on the in-car TV machine control desk, illustrate that the liquid crystal display upset puts in place, and in-car TV machine control desk is controlled motor 7 and stopped operating.
When opening liquid crystal display or closing liquid crystal display, shock pad 4 is after swinging strut 5 drive liquid crystal displays put in place, all resorption is received 52 pairs of conducting boss and is opened to a detection lug 1 or closes the impact of detection lug 2 of putting in place, the elasticity of shock pad 4 has increased conducting boss 52 and has opened the detection lug 1 or close of putting in place the reliability that detection lug 2 contacts that puts in place, eliminate the gap that each rotating mechanism produces simultaneously, do not rock after liquid crystal display is put in place.
The above only is the utility model preferred embodiment, does not limit the scope that the utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that the utility model is contained.