Abstract:
The invention discloses a pointer type angle measuring device, comprising a shell consisting of a front cover and a rear cover, windows respectively arranged on the front cover and the rear cover, respectively; a front transparent cover and a rear transparent cover respectively arranged on the windows of the front cover and the rear cover; a pointer, arranged within an inner cavity of the shell inside the front transparent cover and the rear transparent cover; a dial of circular shape, fixed at the outer edge of the windows on the shell. The double-sided readout pointer type angle measuring device with lighting of the invention is convenient to be used in measurement and correction of horizontal and vertical angles of objects when it is inconvenient to be read from single side.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This present application claims the benefit of Chinese Patent Application No. 201510244595.X filed on May 14, 2015, the contents of which are hereby incorporated by reference. 
       FIELD OF THE INVENTION 
       [0002]    The invention relates to a double-sided readout pointer type angle measuring device used for measurement and correction of horizontal, vertical and 45° angles of objects. 
       BACKGROUND 
       [0003]    Currently, measurement and correction of horizontal and vertical angles of objects are often needed during house decoration and maintenance, installation of articles, etc, the pointers of existing pointer type angle measuring devices can only be read from single side, causing inconvenience to measurement and correction of horizontal and vertical angles of objects. In addition, it is extremely inconvenient to measure and read objects in dark environment. 
       SUMMARY OF THE INVENTION 
       [0004]    The purpose of the invention is to provide a double-sided readout pointer type angle measuring device with lighting so as to solve the problems that existing pointer type angle measuring devices are inconvenient to be read from single side and cannot measure and indicate angles in dark environment due to absence of double-sided readout and lighting functions, thus bringing convenience for measurement and correction of horizontal and vertical angles of objects when it is inconvenient to be read from one side and the environment is dark. 
         [0005]    In order to achieve the purpose, the invention adopts the following technical scheme: a pointer type angle measuring device, comprising: 
         [0006]    a shell, consisting of a front cover and a rear cover, windows respectively arranged on the front cover and the rear cover, and a front transparent cover and a rear transparent cover respectively arranged on the windows of the front cover and the rear cover; 
         [0007]    a pointer, arranged within an inner cavity of the shell inside the front transparent cover and the rear transparent cover; and 
         [0008]    a dial of circular shape, fixed at the outer edge of the windows of the shell. 
         [0009]    Further, the dial is arranged within the inner cavity of the shell inside the front transparent cover and the rear transparent cover. 
         [0010]    Further, antiglare films are respectively attached on the front transparent cover and the rear transparent cover. 
         [0011]    Further, the pointer consists of a pointer body, a front pointer head and a rear pointer head. 
         [0012]    Further, the front pointer head and the rear pointer head are made of a transparent reflective material. 
         [0013]    Further, the pointer body is of shell structure having an inner cavity; a level bubble is arranged in the inner cavity of the said pointer body, and level bubble windows are arranged in the front and rear of the pointer body. 
         [0014]    Further, a through axle hole is arranged in the middle of the pointer body, a bearing is installed in the axle hole, a main shaft is installed in a bearing hole of the bearing, two ends of the main shaft are fixed to the front transparent cover and the rear transparent cover, and the said pointer can rotate around the main shaft as the axial line. 
         [0015]    Further, an LED lighting unit is arranged within the inner cavity of the shell, and the LED lighting unit comprises a circular LED fixing ring arranged at inside edge of the dial, an LED light-emitting flexible circuit board is arranged on the LED fixing ring, and multiple LEDs are arranged on the LED light-emitting flexible circuit board. 
         [0016]    Further, the LED light-emitting flexible circuit board comprises a microcomputer processor IC 1 , a power circuit, an alarm circuit, a charging protective circuit and an LED drive circuit; wherein: 
         [0017]    the microcomputer processor IC 1  is an HT46R064B microcomputer processor; 
         [0018]    the power circuit comprises a capacitor C 2 , a capacitor C 3 , a parallel voltage stabilizing integrated circuit IC 2 , a resistor R 4 , a resistor R 5  and a resistor R 6 ; wherein, the capacitor C 2  is an electrolytic capacitor, the cathode of the capacitor C 2  is grounded and connected with pin  5  of the microcomputer processor IC 1 , one end of the capacitor C 3 , the anode of the parallel voltage stabilizing integrated circuit IC 2 , one end of the resistor R 5  and one end of the resistor R 6 ; the anode of the capacitor C 2 , pin  13  of the microcomputer processor IC 1 , pin  12  of the microcomputer processor IC 1 , the other end of the capacitor C 3 , the cathode of the parallel voltage stabilizing integrated circuit IC 2 , one end of the resistor R 4  and one end of the resistor R 6  are connected to the mains voltage VDD in the circuit; and the other end of the resistor R 4 , the other end of the resistor R 5  and the reference electrode of the parallel voltage stabilizing integrated circuit IC 2  are connected; 
         [0019]    the alarm circuit comprises a buzzer BUZ, a resistor R 9  and a triode Q 2 ; wherein one end of the resistor R 9  is connected with pin  15  of the microcomputer processor IC 1 , and the other end is connected with the base electrode of the triode Q 2 , pin  1  of the buzzer BUZ is connected with the mains voltage VDD, pin  2  of the buzzer BUZ is connected with the collector electrode of the triode Q 2 , and the emitter electrode of the triode Q 2  is grounded; 
         [0020]    the charging protective circuit comprises a power source E, a resistor R 2 , a resistor R 3 , a resistor R 8 , a resistor R 24 , a resistor R 25  and a triode Q 1 ; wherein, the cathode of the power source E is connected with one end of the resistor R 24  and grounded, the anode of the power source E is connected with one end of the resistor R 8 , one end of the resistor R 25 , the emitter electrode of the triode Q 1  and the mains voltage VDD; the other end of the resistor R 24  is connected with the other end of the resistor R 25  and pin  4  of the microcomputer process IC 1 , the other end of the resistor R 8  is connected with one end of the resistor R 3 , the collector electrode of the triode Q 1  and the mains voltage VCC, the other end of the resistor R 3  is connected with the base electrode of the triode Q 1  and one end of the resistor R 2 , and the other end of the resistor R 2  is connected with pin  7  of the microcomputer process IC 1 ; 
         [0021]    the LED drive circuit comprises a triode Q 3 , resistors R 10  to R 23 , and light emitting diodes LED 1  to LED 12 ; wherein, one end of resistors R 14  to R 23  is respectively connected with the cathodes of light emitting diodes LED 3  to LED 12 , the other ends of the resistors R 14  to R 23  are connected and grounded, and the anodes of light emitting diodes LED 3  to LED 12  are connected with the collector electrode of the triode Q 3 , the emitter electrode of the triode Q 3  is connected with one end of the resistor R 12 , the anode of the light emitting diode LED 1 , the anode of the light emitting diode LED 2  and the mains voltage VDD, the base electrode of the triode Q 3  is connected with the other end of the resistor R 12  and one end of the resistor R 13 , the other end of the resistor R 13  is connected with pin  11  of the microcomputer process IC 1 , the cathode of the light emitting diode LED 1  is connected with one end of the resistor R 10 , the other end of the resistor R 10  is connected with pin  16  of the microcomputer process IC 1 , the cathode of the light emitting diode LED 2  is connected with one end of the resistor R 11 , and the other end of the resistor R 11  is connected with pin  1  of the microcomputer process IC 1 . 
         [0022]    Further, the LED light-emitting flexible circuit board comprises an energy-saving circuit, and the energy-saving circuit comprises a capacitor C 1 , a capacitor C 4 , a resistor R 1 , a resistor R 11  and a starting switch SK; wherein, the capacitor C 1  is an electrolytic capacitor, the anode of the capacitor C 1  is connected with one end of the resistor R 11  and the mains voltage VCC in the circuit, the cathode of the capacitor C 1  is grounded and connected with the other end of the resistor R 11 , one end of the capacitor C 4  and one end of the resistor R 1 ; the other end of the capacitor C 4  is connected with one end of the starting switch SK and pin  7  of the microcomputer processor IC 1 , and the other end of the starting switch SK is connected with the other end of the resistor R 1 . 
         [0023]    The beneficial effects of the invention are as follows: compared with existing angle measuring devices, the pointer type angle measuring device of the invention can be read from the front side and the rear side at the same time, and the level bubble and the pointer can give out light. The double-sided readout pointer type angle measuring device of the invention can be used either independently or in combination with traditional measuring devices such as level bar. The double-sided readout pointer type angle measuring device with lighting of the invention is convenient to be used in measurement and correction of horizontal and vertical angles of objects when it is inconvenient to be read from single side, and convenient to be used for measurement and reading in dark environment. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0024]      FIG. 1  is a schematic diagram of the appearance of the pointer type angle measuring device of the invention. 
           [0025]      FIG. 2  is a structural diagram of the pointer type angle measuring device of the invention. 
           [0026]      FIG. 3  is a schematic diagram of the appearance of the pointer of the invention. 
           [0027]      FIG. 4  is a structural diagram of the pointer of the invention.  FIG. 5  is schematic circuit diagram of the LED light-emitting flexible circuit board of the invention. 
       
    
    
       [0028]    In  FIG. 1  to  FIG. 4 , 
         [0029]      1 -shell;  1   a -front cover;  1   b -rear cover;  2 -dial;  3 -pointer;  3   a -pointer body;  3   b -front pointer head;  3   c -rear pointer head;  3   d -bearing;  3   e -main shaft;  3   f -level bubble  3   g -level bubble window;  4 -front transparent cover;  4   a -rear transparent cover;  5 -antiglare film;  6 -LED lighting unit;  6   a -LED fixing ring;  7 -LED light-emitting flexible circuit board;  7   a -power circuit;  7   b -alarm circuit ( 7   b );  7   c -charging protective circuit;  7   d -LED drive circuit;  7   e -energy-saving circuit. 
       DESCRIPTION OF THE PREFERRED EMBODIMENT 
       [0030]    As shown in  FIG. 1  to  FIG. 4 , a pointer type angle measuring device of the invention comprises: 
         [0031]    a shell  1 , consisting of a front cover  1   a  and a rear cover  1   b,  windows respectively arranged on the front cover  1   a  and the rear cover  1   b,  and a front transparent cover  4  and a rear transparent cover  4   a  respectively arranged on the windows of the front cover  1   a  and the said rear cover  1   b;    
         [0032]    a pointer  3 , arranged within an inner cavity of the shell  1  inside the front transparent cover  4  and the rear transparent cover  4   a;    
         [0033]    a dial  2  of circular shape, fixed at the outer edge of the windows of the shell  1 . 
         [0034]    In the invention, the dial  2  is preferably arranged within the inner cavity of the shell inside the front transparent cover  4  and the rear transparent cover  4   a.    
         [0035]    In the invention, the pointer  3  consists of a pointer body  3   a,  a front pointer head ( 3   b ) and a rear pointer head  3   c.    
         [0036]    Wherein, the front pointer head  3   b  and the rear pointer head  3   c  are made of a transparent reflective material. 
         [0037]    Wherein, the pointer body  3   a  is of shell structure having an inner cavity; a level bubble  3   f  is arranged in the inner cavity of the pointer body  3   a,  and level bubble windows  3   g  are arranged in the front and rear of the pointer body  3   a.    
         [0038]    Wherein, a through axle hole is arranged in the middle of the pointer body  3   a,  a bearing  3   d  is installed within the axle hole, a main shaft  3   e  is installed in a bearing hole of the bearing  3   d,  two ends of the main shaft  3   e  are fixed to the front transparent cover  4  and the rear transparent cover  4   a,  and the pointer  3  can rotate around the main shaft  3   e  as the axial line. 
         [0039]    An LED lighting unit  6  is arranged within the inner cavity of the shell  1  of the invention, the LED lighting unit  6  comprises a circular LED fixing ring  6   a  arranged on the edge of the inside dial  2 , an LED light-emitting flexible circuit board  7  is arranged on the LED fixing ring  6   a,  and multiple LEDs are arranged on the LED light-emitting flexible circuit board  7 . 
         [0040]    As shown in  FIG. 5 , the LED light-emitting flexible circuit board  7  comprises a microcomputer processor IC 1 , a power circuit  7   a,  an alarm circuit  7   b,  a charging protective circuit  7   c  and an LED drive circuit  7   d;  wherein: 
         [0041]    the microcomputer processor IC 1  is an HT46R064B microcomputer processor; 
         [0042]    the power circuit  7   a  comprises a capacitor C 2 , a capacitor C 3 , a parallel voltage stabilizing integrated circuit IC 2 , a resistor R 4 , a resistor R 5  and a resistor R 6 ; wherein, the capacitor C 2  is an electrolytic capacitor, the cathode of the capacitor C 2  is grounded and connected with pin  5  of the microcomputer processor IC 1 , one end of the capacitor C 3 , the anode of the parallel voltage stabilizing integrated circuit IC 2 , one end of the resistor R 5  and one end of the resistor R 6 ; the anode of the capacitor C 2 , pin  13  of the microcomputer processor IC 1 , pin  12  of the microcomputer processor IC 1 , the other end of the capacitor C 3 , the cathode of the parallel voltage stabilizing integrated circuit IC 2 , one end of the resistor R 4  and one end of the resistor R 6  are connected to the mains voltage VDD in the circuit; and the other end of the resistor R 4 , the other end of the resistor R 5  and the reference electrode of the parallel voltage stabilizing integrated circuit IC 2  are connected; 
         [0043]    the alarm circuit  7   b  comprises a buzzer BUZ, a resistor R 9  and a triode Q 2 ; wherein, one end of the resistor R 9  is connected with pin  15  of the microcomputer processor IC 1 , and the other end is connected with the base electrode of the triode Q 2 , pin  1  of the buzzer BUZ is connected with the mains voltage VDD, pin  2  of the buzzer BUZ is connected with the collector electrode of the triode Q 2 , and the emitter electrode of the triode Q 2  is grounded; 
         [0044]    the charging protective circuit  7   c  comprises a power source E, a resistor R 2 , a resistor R 3 , a resistor R 8 , a resistor R 24 , a resistor R 25  and a triode Q 1 ; wherein, the cathode of the power source E is connected with one end of the resistor R 24  and grounded, the anode of the power source E is connected with one end of the resistor R 8 , one end of the resistor R 25 , the emitter electrode of the triode Q 1  and the mains voltage VDD; the other end of the resistor R 24  is connected with the other end of the resistor R 25  and pin  4  of the microcomputer process IC 1 , the other end of the resistor R 8  is connected with one end of the resistor R 3 , the collector electrode of the triode Q 1  and the mains voltage VCC, the other end of the resistor R 3  is connected with the base electrode of the triode Q 1  and one end of the resistor R 2 , and the other end of the resistor R 2  is connected with pin  7  of the microcomputer process IC 1 ; 
         [0045]    the LED drive circuit  7   d  comprises a triode Q 3 , resistors R 10  to R 23 , and light emitting diodes LED 1  to LED 12 ; wherein, one end of resistors R 14  to R 23  is respectively connected with the cathodes of light emitting diodes LED 3  to LED 12 , the other ends of the resistors R 14  to R 23  are connected and grounded, and the anodes of light emitting diodes LED 3  to LED 12  are connected with the collector electrode of the triode Q 3 , the emitter electrode of the triode Q 3  is connected with one end of the resistor R 12 , the anode of the light emitting diode LED 1 , the anode of the light emitting diode LED 2  and the mains voltage VDD, the base electrode of the triode Q 3  is connected with the other end of the resistor R 12  and one end of the resistor R 13 , the other end of the resistor R 13  is connected with pin  11  of the microcomputer process IC 1 , the cathode of the light emitting diode LED 1  is connected with one end of the resistor R 10 , the other end of the resistor R 10  is connected with pin  16  of the microcomputer process IC 1 , the cathode of the light emitting diode LED 2  is connected with one end of the resistor R 11 , and the other end of the resistor R 11  is connected with pin  1  of the microcomputer process IC 1 . 
         [0046]    To realize automatic energy saving in operation, the LED light-emitting flexible circuit board  7  of the invention further comprises an energy-saving circuit  7   e,  the energy-saving circuit  7   e  comprising a capacitor C 1 , a capacitor C 4 , a resistor R 1 , a resistor R 11  and a starting switch SK; wherein, the capacitor C 1  is an electrolytic capacitor, the anode of the capacitor C 1  is connected with one end of the resistor R 11  and the mains voltage VCC in the circuit, the cathode of the capacitor C 1  is grounded and connected with the other end of the resistor R 11 , one end of the capacitor C 4  and one end of the resistor R 1 ; the other end of the capacitor C 4  is connected with one end of the starting switch SK and pin  7  of the microcomputer processor IC 1 , and the other end of the starting switch SK is connected with the other end of the resistor R 1 . 
         [0047]    The working principle of the present invention is as follows: the light emitting diodes LED 1  to LED 12  are wired in the LED lighting circuit for lighting up the dial, the level bubble and the pointer. The power circuit of the LED light-emitting flexible circuit board  7  supplies power to the LED lighting circuit through the microcomputer processer IC 1  to light up the LEDs, allowing the pointer and the level bubble to give out light when the LEDs light up on the level bubble  3   f  in the pointer body  3   a  and the pointer head. The pointer  3  always points to the right above position by its own gravity regardless of the tilt angle of the datum plane of the double-sided pointer type angle measuring device. When the turning angle of the double-sided pointer type angle measuring device of the invention is determined, the angle on the dial indicated by the pointer is the tilt angle of the angle measuring device. 
         [0048]    The above mentioned examples are only preferred examples of the invention and not used to limit the invention. Any modification, equivalent replacement and improvement made within the range of the spirit and rule of the invention shall fall within the protection range of the invention.