Disclosure of Invention
The invention relates to a projection device, in particular to a device suitable for B-mode ultrasonic film and projection, wherein a device is arranged on a base and the rotation angle of the projection film placing device can be changed, the projection film placing device can receive projection scenes, change the projection area and view negative films, a direction adjusting device can change the projection direction of a projection instrument, and an angle adjusting device can adjust the angle of projected images.
In order to solve the technical problems, the invention relates to a projection device, in particular to a device suitable for B-mode ultrasonic film and projection, which comprises a mounting base, a projection film placing device, a direction adjusting device and an angle adjusting device, wherein the mounting base is used for mounting other devices and changing the rotation angle of the projection film placing device, the projection film placing device can receive projection scenes, can change the projection area and view negative films, the direction adjusting device can change the projection direction of a projection instrument, and the angle adjusting device can adjust the angle when the images are projected out, and the device is characterized in that: the projection film placing device is fixedly installed on the installation base, the direction adjusting device is fixedly installed on the installation base, and the angle adjusting device is fixedly installed on the direction adjusting device.
As a further optimization of the technical scheme, the installation base of the equipment suitable for B-mode ultrasonography and projection comprises a trapezoidal base, a reverse installation base, a strip-shaped hole, a slideway, a movable strip, a limiting strip, a hinge rod installation shaft, a threaded hole, a hinge rod, a top spline groove rotating lead screw, a receiving gear, a motor, an output gear, a self-locking tooth, a spring top cap, a spring, an internal spline self-acting fluted disc, a connecting sleeve, an unlocking cap, an annular groove, a matching disc, an unlocking fork, a limiting disc, a spring I, a pushing disc, a trapezoidal groove and a lead screw installation hole, wherein the reverse installation base is fixedly installed on the trapezoidal base, the strip-shaped hole is arranged inside the rectangular base, the slide way is arranged inside the rectangular base, the movable strip is slidably installed inside the strip-shaped hole, the limiting strip is fixedly installed on the movable strip, the limiting strip is slidably installed inside the slideway, the rod hinge, the screw hole is arranged on the movable strip, the hinge rod is fixedly arranged on the hinge rod mounting shaft, the top spline groove rotating screw rod is movably arranged inside the trapezoidal base, the receiving gear is fixedly arranged on the top spline groove rotating screw rod, the motor is fixedly arranged on the trapezoidal base, the output gear is fixedly arranged on the motor, the output gear is meshed with the receiving gear, the self-locking teeth are fixedly arranged on the trapezoidal base, the spring top cap is fixedly arranged on the top spline groove rotating screw rod, the spring is movably arranged on the top spline groove rotating screw rod, the internal spline self-acting fluted disc is movably arranged on the top spline groove rotating screw rod, the connecting sleeve is fixedly arranged on the internal spline self-acting fluted disc, the unlocking cap is movably arranged on the connecting sleeve through the annular groove, the annular groove is arranged on the unlocking cap, the matching disc is fixedly arranged on the unlocking cap, and the unlocking, the limiting disc is fixedly installed on the unlocking fork, the spring I is movably installed on the unlocking fork, the pushing disc is fixedly installed on the unlocking fork, the trapezoidal groove is formed in the shape base, and the lead screw installation hole is formed in the shape base.
As a further optimization of the technical scheme, the projection film placing device comprises a rotating shell, a connecting seat, a third spring, a T-shaped connecting rod, a hinge rod mounting shaft, a second motor, a rotating threaded rod, a film placing box, a matching thread, a lamp plate, a clamp plate mounting seat, a mounting hole, a connecting shaft, a slotted hole, a third spring, a steel ball and a clamp plate, wherein the rotating shell is fixedly arranged on the connecting seat, the third spring is movably arranged inside the connecting seat, the T-shaped connecting rod is movably arranged inside the reverse mounting seat, the hinge rod mounting shaft is fixedly arranged on the rotating shell, the hinge rod is hinged on the hinge rod mounting shaft, the second motor is fixedly arranged inside the rotating shell, the rotating threaded rod is fixedly arranged on the second motor, the film placing box is slidably arranged inside the rotating shell, the film is put the case and is passed through cooperation screw thread and rotation threaded rod screw-thread fit, cooperation screw thread is installed on the film is put the case, the lamp plate installation is fixed at the film and is put incasement portion, the installation of splint mount pad is fixed on the film is put the case, the mounting hole sets up on the splint mount pad, connecting axle movable mounting is inside the mounting hole, the slotted hole sets up on the connecting axle, three movable mounting of spring are inside the slotted hole, steel ball movable mounting is inside the slotted hole, steel ball and mounting hole cooperation, splint installation is fixed on the.
As a further optimization of the technical scheme, the direction adjusting device of the equipment suitable for B-mode ultrasonic films and projection comprises a moving seat, a third threaded hole, a third rotating screw rod, a third rotating disc, a fixed support box, a rotating disc mounting hole, a small round pit, an orientation changing disc, a third rotating shaft, a bevel gear, a rotating disc, a third slotted hole, a fourth spring, a deadlocking ball column and a large bevel gear, wherein the moving seat is movably mounted inside a trapezoidal groove, the third threaded hole is formed in the moving seat, the third rotating screw rod is mounted inside the third threaded hole, the third rotating screw rod is movably mounted inside the screw rod mounting hole, the third rotating disc is fixedly mounted on the third rotating screw rod, the fixed support box is fixedly mounted on the moving seat, the rotating disc mounting hole is fixedly mounted inside the support box, the small round pit is arranged inside the fixed support box, the orientation changing disc is fixedly mounted on the third rotating shaft, the third rotating shaft is movably mounted inside the, the bevel gear is fixedly arranged on the third rotating shaft, the rotating disc is movably arranged in the rotating disc mounting hole, the third slotted hole is formed in the rotating disc, the fourth spring is movably arranged in the third slotted hole, the blocking ball column is movably arranged in the third slotted hole, the large bevel gear is fixedly arranged on the rotating disc, and the large bevel gear is meshed with the bevel gear.
As a further optimization of the technical scheme, the angle adjusting device of the equipment suitable for B-mode ultrasonic movies and projection comprises a fixed square cylinder, a fourth limiting hole, a fourth rotating shaft, a first bevel gear, a fourth rotating disc, a fourth limiting rod, a sixth spring, a limiting rod limiting ring, a lead screw mounting ring, a fourth lead screw, a second bevel gear, an internal thread moving square column, a T-shaped cylinder, a placing disc, a matching strip-shaped groove, a spherical hole and a supporting spherical end rod, wherein the fixed square cylinder is fixedly arranged on the rotating disc, the fourth limiting hole is formed in the fixed square cylinder, the fourth rotating shaft is movably arranged on the fixed square cylinder, the first bevel gear is fixedly arranged on the fourth rotating shaft, the fourth limiting rod is movably arranged on the fourth rotating disc, the sixth spring is movably arranged on the fourth limiting rod, the limiting rod limiting ring is fixedly arranged on the fourth limiting rod, the lead screw mounting ring is fixedly arranged in the fixed square cylinder, four movable mounting of lead screw are on the lead screw collar, two installation of bevel gear are fixed on the lead screw is four, two meshing of bevel gear and bevel gear, internal thread removes square column movable mounting inside fixed square tube, internal thread removes square column and four screw-thread fit of lead screw, T shape cylinder installation is fixed on internal thread removes square column, it passes through spherical hole movable mounting to put the dish on supporting the ball end pole, cooperation bar groove sets up on putting the dish, it passes through bar groove movable mounting on T shape cylinder to put the dish, spherical hole sets up on putting the dish, it fixes on the rotary disk to support ball end pole installation.
As a further optimization of the technical scheme, the projection film placing device of the projection film placing device is suitable for B-mode ultrasonic film and projection equipment, the number of the t-shaped connecting rods is two, the number of the hinge rod mounting shafts is two, the film placing box is made of semitransparent white plastic, and the number of the connecting shafts, the number of the slotted holes, the number of the springs is three, and the number of the steel balls is four.
As a further optimization of the technical scheme, the direction adjusting device of the equipment suitable for B-mode ultrasonography and projection has eleven small pits, and the number of the third slotted hole, the fourth spring and the blocking ball column is eleven.
The equipment suitable for B-ultrasonic film and projection has the advantages that:
the invention relates to a projection device, in particular to a device suitable for B-mode ultrasonic film and projection, which realizes the functions of mounting a device through a mounting base and changing the rotation angle of a projection film placing device, wherein the projection film placing device can receive projection scenes, change the projection area and view negative films, a direction adjusting device can change the projection direction of a projection instrument, and an angle adjusting device adjusts the angle when an image is projected out.
Detailed Description
The first embodiment is as follows:
in order to solve the above technical problems, the present invention relates to a projection apparatus, and more particularly to an apparatus for B-mode ultrasonography and projection, which comprises a base 1, a projection film placing device 2, a direction adjusting device 3, and an angle adjusting device 4, wherein the base 1 is used for mounting other devices and can change the rotation angle of the projection film placing device 2, the projection film placing device 2 can receive projection scenes, can change the projection area and view negative films, the direction adjusting device 3 can change the projection direction of the projection apparatus, and the angle adjusting device 4 can adjust the angle when the images are projected out, and is characterized in that: the projection film placing device 2 is fixedly installed on the installation base 1, the direction adjusting device 3 is fixedly installed on the installation base 1, and the angle adjusting device 4 is fixedly installed on the direction adjusting device 3.
The second embodiment is as follows:
the present embodiment is further described with reference to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27. the present embodiment further describes the first embodiment, where the mounting base 1 includes a trapezoidal base 1-1, a reverse mounting base 1-2, a strip-shaped hole 1-3, a slideway 1-4, a moving strip 1-5, a limit strip 1-6, a hinge rod mounting shaft 1-7, a threaded hole 1-8, a hinge rod 1-9, a top spline groove rotating screw 1-10, a receiving gear 1-11, a motor 1-12, an output gear 1-13, a self-locking tooth 1-14, a top spring cap 1-15, a spring 1-16, an internal spline disc 1-17, a self-toothed disc 1-17, a gear, and a gear shaft 1-3, 1-18 parts of connecting sleeve, 1-19 parts of unlocking cap, 1-20 parts of annular groove, 1-21 parts of matching disc, 1-22 parts of unlocking fork, 1-23 parts of limiting disc, 1-24 parts of spring, 1-25 parts of pushing disc, 1-26 parts of trapezoidal groove and 1-27 parts of lead screw mounting hole, 1-12 parts of motor drives 1-13 parts of output gear to rotate, 1-13 parts of output gear drives 1-11 parts of receiving gear to rotate, 1-11 parts of receiving gear drive 1-10 parts of top end spline groove rotating lead screw to rotate, 1-10 parts of top end spline groove rotating lead screw drive 1-5 parts of moving strip 1-5 parts to move in 1-3 parts of strip hole, 1-5 parts of moving strip part rotate the projection film placing device 2 around the axis of the reverse rotation mounting seat 1-2 through the hinge rods 1-9, in, the self-locking teeth 1-14 and the self-acting fluted disc 1-17 of the internal spline are tightly matched under the pushing of the springs 1-16 to prevent the moving strip 1-5 from moving reversely, when the projection film placing device 2 needs to be placed down, the unlocking forks 1-22 are pushed inwards by the pushing disks 1-25, the front ends of the unlocking forks 1-22 push the unlocking caps 1-19 outwards by the matching disks 1-21, the unlocking caps 1-19 pull the internal spline self-acting fluted disc 1-17 to move outwards through the connecting sleeves 1-18 and separate from the self-locking teeth 1-14, then the spline grooves at the top end can be controlled to rotate the screw 1-10 reversely, when self-locking is needed, the hands are loosened, and the springs 1-16 and the springs 1-24 can help the self-acting fluted disc 1-17 of the internal spline and the unlocking fork 1-22 to reset, the reverse rotation mounting seat 1-2 is fixedly arranged on the shaped base 1-1, the strip-shaped hole 1-3 is arranged inside the shaped base 1-1, the slideway 1-4 is arranged inside the shaped base 1-1, the movable strip 1-5 is slidably arranged inside the strip-shaped hole 1-3, the limit strip 1-6 is fixedly arranged on the movable strip 1-5, the limit strip 1-6 is slidably arranged inside the slideway 1-4, the hinge rod mounting shaft 1-7 is movably arranged on the movable strip 1-5, the threaded hole 1-8 is arranged on the movable strip 1-5, the hinge rod 1-9 is fixedly arranged on the hinge rod mounting shaft 1-7, the top spline groove rotating screw 1-10 is movably arranged inside the trapezoidal base 1-1, the receiving gear 1-11 is fixedly arranged on the top spline groove rotating screw 1-10, the motor 1-12 is fixedly arranged on the trapezoidal base 1-1, the output gear 1-13 is fixedly arranged on the motor 1-12, the output gear 1-13 is meshed with the receiving gear 1-11, the self-locking teeth 1-14 are fixedly arranged on the trapezoidal base 1-1, the spring top cap 1-15 is fixedly arranged on the top end spline groove rotating lead screw 1-10, the spring 1-16 is movably arranged on the top end spline groove rotating lead screw 1-10, the internal spline self-acting fluted disc 1-17 is movably arranged on the top end spline groove rotating lead screw 1-10, the connecting sleeve 1-18 is fixedly arranged on the internal spline self-acting fluted disc 1-17, the unlocking cap 1-19 is movably arranged on the connecting sleeve 1-18 through the annular groove 1-20, the annular groove 1-20 is arranged on the unlocking cap 1-19, the matching disc 1-21 is fixedly arranged on the unlocking cap 1-19, the unlocking fork 1-22 is movably arranged on the trapezoidal base 1-1, the limiting disc 1-23 is fixedly arranged on the unlocking fork 1-22, the first spring 1-24 is movably arranged on the unlocking fork 1-22, the pushing disc 1-25 is fixedly arranged on the unlocking fork 1-22, the trapezoidal groove 1-26 is arranged in the trapezoidal base 1-1, and the lead screw mounting hole 1-27 is arranged in the trapezoidal base 1-1.
The third concrete implementation mode:
the embodiment is further described with reference to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27. the embodiment includes a projection film placing device 2 including a rotary shell 2-1, a connecting seat 2-2, a spring three 2-3, a t-shaped connecting rod 2-4, a hinge rod mounting shaft 2-5, a motor two 2-6, a rotary threaded rod 2-7, a film placing box 2-8, a matching thread 2-9, a lamp panel 2-10, a clamp plate mounting seat 2-11, a mounting hole 2-12, a connecting shaft 2-13, a slotted hole 2-14, a spring three 2-15, a steel ball 2-16, a clamp plate 2-17, when the projected area is not large enough, the motor II 2-6 drives the rotary threaded rod 2-7 to rotate, the rotary threaded rod 2-7 drives the film placing box 2-8 to rise in the rotary shell 2-1 to increase the projected area, then when the negative needs to be observed, the clamping plate 2-17 is rotated upwards along the connecting shaft 2-13, the connecting shaft 2-13 rotates in the mounting hole 2-12, the steel ball 2-16 moves inwards in the slotted hole 2-14 to compress the spring III 2-15, after the bottom is placed in the film placing box 2-8, the clamping plate 2-17 is rotated back, then the steel ball 2-16 is clamped at the upper end of the mounting hole 2-12 under the action of the spring III 2-15 to prevent the clamping plate 2-17 from being changed arbitrarily, so as to clamp the negative stably, then the lamp panel 2-10 in the film placing box 2-8 is illuminated to observe the negative, a rotating shell 2-1 is fixedly arranged on a connecting seat 2-2, a spring III 2-3 is movably arranged inside the connecting seat 2-2, a T-shaped connecting rod 2-4 is movably arranged inside the connecting seat 2-2, the T-shaped connecting rod 2-4 is movably arranged inside a reverse mounting seat 1-2, a hinge rod mounting shaft 2-5 is fixedly arranged on the rotating shell 2-1, a hinge rod 1-9 is hinged on the hinge rod mounting shaft 2-5, a motor II 2-6 is fixedly arranged inside the rotating shell 2-1, a rotating threaded rod 2-7 is fixedly arranged on the motor II 2-6, a film placing box 2-8 is slidably arranged inside the rotating shell 2-1, and the film placing box 2-8 is in threaded fit with the rotating threaded rod 2-7 through a matching thread 2-9, the matching screw threads 2-9 are installed on a film placing box 2-8, the lamp panels 2-10 are installed and fixed inside the film placing box 2-8, the clamping plate installing seats 2-11 are installed and fixed on the film placing box 2-8, the installing holes 2-12 are formed in the clamping plate installing seats 2-11, the connecting shafts 2-13 are movably installed inside the installing holes 2-12, the slotted holes 2-14 are formed in the connecting shafts 2-13, the springs three 2-15 are movably installed inside the slotted holes 2-14, the steel balls 2-16 are matched with the installing holes 2-12, and the clamping plates 2-17 are installed and fixed on the connecting shafts 2-13.
The fourth concrete implementation mode:
the following describes the present embodiments with reference to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27. the present embodiment further describes the first embodiment, where the direction adjustment device 3 includes a movable base 3-1, a threaded hole three 3-2, a rotary screw three 3-3, a rotary disc three 3-4, a fixed support box 3-5, a rotary disc mounting hole 3-6, a small circular pit 3-7, an orientation changing disc 3-8, a rotary shaft three 3-9, a bevel gear 3-10, a rotary disc 3-11, a slotted hole three 3-12, a spring four 3-13, a deadlocking ball column 3-14, a large bevel gear 3-15, and by rotating the direction adjustment device 3 of the direction adjustment device 3, the direction adjusting device 3 drives a rotary screw rod three 3-3 to rotate, the rotary screw rod three 3-3 drives a movable seat 3-1 to move in a trapezoidal groove 1-26 to find a proper projection position, then the direction changing disc 3-8 is rotated, the direction changing disc 3-8 drives a rotary shaft three 3-9 to rotate, the rotary shaft three 3-9 drives a bevel gear 3-10 to rotate, the bevel gear 3-10 drives a large bevel gear 3-15 to rotate, the large bevel gear 3-15 drives a rotary disc 3-11 to rotate, the rotary disc 3-11 rotates, simultaneously, a spring four 3-13 in a groove hole three 3-12 is compressed, then a blocking ball column 3-14 moves inwards in the groove hole three 3-12 to be separated from a small circular pit 3-7, and the blocking ball column 3-14 is blocked in the small circular pit 3-7 and the small circular pit 3-7 7, when the direction of the direction adjusting device 3 is not changed when a certain force is not applied, when the position and the direction are determined, the moving seat 3-1 is movably arranged in the trapezoidal groove 1-26, the threaded hole three 3-2 is arranged on the moving seat 3-1, the rotating screw rod three 3-3 is arranged in the threaded hole three 3-2, the rotating screw rod three 3-3 is movably arranged in the screw rod mounting hole 1-27, the rotating disc three 3-4 is fixedly arranged on the rotating screw rod three 3-3, the fixed support box 3-5 is fixedly arranged on the moving seat 3-1, the rotating disc mounting hole 3-6 is arranged in the fixed support box 3-5, the small pit 3-7 is arranged in the fixed support box 3-5, and the direction changing disc 3-8 is fixedly arranged on the rotating shaft three 3-9, a rotating shaft III 3-9 is movably arranged inside a fixed supporting box 3-5, a bevel gear 3-10 is fixedly arranged on the rotating shaft III 3-9, a rotating disc 3-11 is movably arranged inside a rotating disc mounting hole 3-6, a slotted hole III 3-12 is arranged on the rotating disc 3-11, a spring IV 3-13 is movably arranged inside a slotted hole III 3-12, a blocking ball column 3-14 is movably arranged inside the slotted hole III 3-12, a large bevel gear 3-15 is fixedly arranged on the rotating disc 3-11, and the large bevel gear 3-15 is meshed with the bevel gear 3-10. The fifth concrete implementation mode:
the present embodiment is further described with reference to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27. the present embodiment further describes the first embodiment, wherein the angle adjusting device 4 comprises a fixed square tube 4-1, a limit hole four 4-2, a rotating shaft four 4-3, a bevel gear one 4-4, a rotating disc four 4-5, a limit rod four 4-6, a spring six 4-7, a limit rod limit ring 4-8, a lead screw mounting ring 4-9, a lead screw four 4-10, a bevel gear two 4-11, an internal thread moving square column 4-12, a T-shaped column 4-13, a placing disc 4-14, a matching strip-shaped groove 4-15, a spherical hole 4-16, a positioning plate 4-10, a positioning plate 4-11, a matching strip, Supporting the ball end rod 4-17, pulling out the limiting rod four 4-6 from the limiting hole four 4-2 through the rotating disk four 4-5 of the rotating angle adjusting device 4 before rotating the rotating disk four 4-5, then driving the rotating disk four 4-5 to rotate through rotating the limiting rod four 4-6, the rotating disk four 4-5 driving the rotating shaft four 4-3, the rotating shaft four 4-3 driving the rotating shaft four 4-3 to rotate, the rotating shaft four 4-3 driving the bevel gear two 4-11 to rotate, the bevel gear two 4-11 driving the screw rod four 4-10 to rotate, the screw rod four 4-10 driving the internal thread moving square column 4-12 to change the position in the fixed square column 4-1, and then making one end of the matching strip-shaped groove 4-15 of the placing disk 4-14 change the angle, a fixed square barrel 4-1 is fixedly arranged on a rotating disc 3-11, a limiting hole IV 4-2 is arranged on the fixed square barrel 4-1, a rotating shaft IV 4-3 is movably arranged on the fixed square barrel 4-1, a bevel gear I4-4 is fixedly arranged on the rotating shaft IV 4-3, a rotating disc IV 4-5 is fixedly arranged on the rotating shaft IV 4-3, a limiting rod IV 4-6 is movably arranged on the rotating disc IV 4-5, a spring VI 4-7 is movably arranged on a limiting rod IV 4-6, a limiting rod limiting ring 4-8 is fixedly arranged on the limiting rod IV 4-6, a screw rod mounting ring 4-9 is fixedly arranged inside the fixed square barrel 4-1, a screw rod IV 4-10 is movably arranged on the screw rod mounting ring 4-9, and a bevel gear II 4-11 is fixedly arranged on the screw rod IV 4-10, the bevel gear II 4-11 is meshed with the bevel gear I4-4, the internal thread moving square column 4-12 is movably arranged inside the fixed square barrel 4-1, the internal thread moving square column 4-12 is in threaded fit with the screw rod IV 4-10, the T-shaped cylinder 4-13 is fixedly arranged on the internal thread moving square column 4-12, the placing disc 4-14 is movably arranged on the supporting ball end rod 4-17 through the spherical hole 4-16, the matching strip-shaped groove 4-15 is arranged on the placing disc 4-14, the placing disc 4-14 is movably arranged on the T-shaped cylinder 4-13 through the strip-shaped groove 4-15, the spherical hole 4-16 is arranged on the placing disc 4-14, and the supporting ball end rod 4-17 is fixedly arranged on the rotating disc 3-11.
The sixth specific implementation mode:
the third embodiment will be further described with reference to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, and 27. the third embodiment is further described, in which there are two t-shaped connecting rods 2-4 of the projection film holding device 2, two hinge rod mounting shafts 2-5, the film holding box 2-8 is made of translucent white plastic, and there are four connecting shafts 2-13, slots 2-14, springs three 2-15, and steel balls 2-16.
The seventh embodiment:
the present embodiment is described below with reference to fig. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, and 27, and the present embodiment further describes the fourth embodiment, in which the number of the small pits 3 to 7 of the direction adjustment device 3 is eleven, and the number of the slotted holes three 3 to 12, the springs four 3 to 13, and the dead-ball columns 3 to 14 is eleven.
The working principle of the invention is as follows:
a working principle of equipment suitable for B-mode ultrasonography and projection is that whether the connection condition between devices meets requirements is checked before use, when projection is needed, a projection instrument is firstly placed on a placing disc 4-14 of an angle adjusting device 4, if projection is needed on other screens or walls, a direction adjusting device 3 of the direction adjusting device 3 is rotated, the direction adjusting device 3 drives a rotary screw rod three 3-3 to rotate, the rotary screw rod three 3-3 drives a moving seat 3-1 to move in a trapezoidal groove 1-26 to find a proper projection position, then the direction changing disc 3-8 is rotated, the direction changing disc 3-8 drives a rotary shaft three 3-9 to rotate, the rotary shaft three 3-9 drives a bevel gear 3-10 to rotate, the bevel gear 3-10 drives a large bevel gear 3-15 to rotate, the large bevel gear 3-15 drives the rotating disc 3-11 to rotate, the rotating disc 3-11 rotates, simultaneously, the spring four 3-13 in the slotted hole three 3-12 is compressed, then the blocking ball column 3-14 moves inwards in the slotted hole three 3-12 to separate from the small round pit 3-7, when the rotating disc 3-11 rotates for a certain angle, the blocking ball column 3-14 is blocked between the small round pit 3-7 and the small round pit 3-7, the direction of the direction adjusting device 3 is not changed when the force is not applied, when the position and the direction are determined, the limiting rod four 4-6 is firstly pulled out from the limiting hole four 4-2 before the rotating disc four 4-5, then the rotating disc four 4-5 is driven to rotate by rotating the limiting rod four 4-6, the rotating disc IV 4-5 drives the rotating shaft IV 4-3, the rotating shaft IV 4-3 drives the rotating shaft IV 4-3 to rotate, the rotating shaft IV 4-3 drives the bevel gear II 4-11 to rotate, the bevel gear II 4-11 drives the screw rod IV 4-10 to rotate, the screw rod IV 4-10 drives the internal thread moving square column 4-12 to change the position in the fixed square cylinder 4-1, then one end of the matching strip-shaped groove 4-15 of the placing disc 4-14 is changed in angle, so that the projection angle is adjusted, if projection is needed on the equipment, a projection instrument is aligned to the direction of the projection film placing device 2, then the motor 1-12 drives the output gear 1-13 to rotate, the output gear 1-13 drives the receiving gear 1-11 to rotate, the receiving gear 1-11 drives the top spline groove rotating screw rod 1-10 to rotate, the top end spline groove rotating lead screw 1-10 drives the moving long strip 1-5 to move inside the strip-shaped hole 1-3, the moving long strip 1-5 rotates the projection film placing device 2 around the axis of the reverse installation seat 1-2 through the hinge rod 1-9, in the rotating process, the self-locking teeth 1-14 and the internal spline self-operation fluted disc 1-17 are tightly matched under the pushing of the springs 1-16 to prevent the moving long strip 1-5 from moving reversely, when the projection film placing device 2 needs to be placed down, the unlocking forks 1-22 are pushed inwards through the pushing discs 1-25, the front ends of the unlocking forks 1-22 push the unlocking caps 1-19 outwards through the matching discs 1-21, the unlocking caps 1-19 pull the internal spline self-operation fluted disc 1-17 to move outwards through the connecting sleeves 1-18 and separate from the self-locking teeth 1-14, and then the top end spline groove rotating lead screw can be controlled The reverse rotation of the lever 1-10 is realized, when self-locking is needed, the hand is loosened, the springs 1-16 and the springs 1-24 can help the internal spline self-acting fluted disc 1-17 and the unlocking fork 1-22 to reset, when the projected area is not large enough, the motor 2-6 drives the rotating threaded rod 2-7 to rotate, the rotating threaded rod 2-7 drives the film placing box 2-8 to lift up the projected area in the rotating shell 2-1, then when the negative film needs to be observed, the clamping plate 2-17 rotates upwards along the connecting shaft 2-13, the connecting shaft 2-13 rotates in the mounting hole 2-12, the steel balls 2-16 move inwards in the slotted holes 2-14 to compress the springs three 2-15, when the bottom is placed in the film placing box 2-8, the clamping plate 2-17 rotates back, then the steel balls 2-16 are clamped at the notches at the upper ends of the mounting holes 2-12 under the action of the springs three 2-15 to prevent the clamping plates 2-17 from arbitrarily changing, so that the negative film is clamped stably, and then the negative film is observed by lighting the lamp plate 2-10 inside the film placing box 2-8.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and that various changes, modifications, additions and substitutions which are within the spirit and scope of the present invention and which may be made by those skilled in the art are also within the scope of the present invention.