A power supply device for teaching projector

Abstract

The present invention discloses a teaching projector power supply device, which relates to the field of projector power supply. The teaching projector power supply device comprises a power supply base and a storage battery, a power supply wire and a connecting wire arranged on the power supply base, and a circuit control mechanism is arranged on the other side of the power supply base. The teaching projector power supply device is provided with a projector placement slot on the power supply base, and the power supply base stores the projector when it is carried, and the power supply base is used as a support member when it is used. At the same time, the circuit control mechanism is used, so that the power supply device can select an external circuit or a built-in battery for power supply, and can also charge the storage battery through the connecting wire, thereby reducing circuit equipment. At the same time, when external power supply is performed, the current does not pass through the storage battery, thereby avoiding the problem of overheating and reduced service life of the storage battery caused by charging and discharging at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of projector power supply, in particular to a teaching projector power supply device. Background Art

[0002] A projector is a device that can project image content onto a wall or screen. It can be connected to an external device through wired or wireless connections, and the content to be projected is imported into the projector, and then projected outward. It is widely used in various types of teaching. There is no need to spend a lot of money to make a large display, and a larger image can be projected in scenarios with a large number of teaching people.

[0003] When the device is actually used, it is usually connected to an external circuit by wires. However, in some specific scenarios, such as outdoor teaching or places where external power supply is inconvenient, a suitable energy storage battery is usually used for power supply. The capacity of the embedded battery is small, and the battery life is often insufficient. In addition, a direct circuit is often used in the design, that is, the power wire, battery and projector are directly connected. When plugged in, the current enters the battery, and then the battery powers the projector, causing the battery to heat up and affecting its life. The external battery is larger in size and needs to be carried separately from the projector when in use, which is inconvenient to use and carry. Therefore, a teaching projector power supply device is provided to solve the above problems. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a power supply device for a teaching projector, which solves the problem that the capacity of an embedded battery is small and the battery life is often insufficient for use. In addition, a direct circuit is often used in the design, that is, the power wire, the battery and the projector are directly connected. When plugged in, the current enters the battery, and then the battery powers the projector, causing the battery to heat up and affecting its life. In addition, an external battery is larger in size and needs to be carried separately from the projector when in use, which is inconvenient to use and carry.

[0005] To achieve the above purpose, the present invention is implemented through the following technical solutions: a teaching projector power supply device, including a power supply base and a plurality of batteries installed in parallel inside the power supply base, a power supply wire for powering the projector is installed on the top of the power supply base, a connection wire is arranged on one side of the power supply base, and a circuit control mechanism is arranged on the other side of the power supply base, and the circuit control mechanism includes;

[0006] Four groups of power connectors, the four groups of power connectors are arranged in a circular array in the inner wall of the power supply base, and the four groups of power connectors are respectively connected to the power supply wire, the connection wire, the battery discharge terminal and the battery charging terminal;

[0007] A rotary circuit connector disposed in the inner side wall of the power supply base;

[0008] The rotary circuit connector comprises:

[0009] A rotating shaft, which is rotatably arranged at the center of the four sets of electrical terminals;

[0010] Two groups of electrical connection protrusions are installed perpendicularly to each other on the outer side of the rotating shaft, the two groups of electrical connection protrusions are electrically connected, and the electrical connection protrusions are used to electrically connect to the electrical connection head;

[0011] An embedded conductor is arranged inside the electrical connection protrusion;

[0012] A memory spring is disposed between the rotating shaft and the power connection protrusion, and the memory spring is used to push the power connection protrusion toward the power connection head;

[0013] The electrical connector comprises:

[0014] An insulating seat, which is fixedly arranged inside the power supply base;

[0015] A rotating connector is rotatably arranged on both sides of the interior of the insulating seat;

[0016] The sliding top shaft is movably inserted in the interior of the insulating seat, one end of the sliding top shaft contacts the power connection convex part, and the other end of the sliding top shaft is used to push the rotating connecting part to rotate until it contacts the embedded conductor.

[0017] Preferably, the power connector further comprises:

[0018] A special-shaped positioning portion is arranged at the front end of the insulating seat, the two sides of the special-shaped positioning portion are convex and the middle part is concave, and the end of the sliding top shaft passes through the middle part of the special-shaped positioning portion;

[0019] An arc-shaped contact conductor is fixedly disposed at the end of the rotating connector, and the arc-shaped contact conductor runs through both sides of the special-shaped positioning portion, and the arc-shaped contact conductor is electrically connected to the embedded conductor;

[0020] The front convex ball member and the rear convex ball member are respectively fixedly arranged on the outer surfaces of both ends of the sliding top shaft, and the end of the rotating connecting member is arranged between the front convex ball member and the rear convex ball member;

[0021] A positioning tube, which is fixedly arranged on the inner wall of the insulating seat;

[0022] A return spring is arranged inside the positioning tube, and the end of the sliding top shaft is movably inserted in the positioning tube to abut against the return spring;

[0023] The first electric wire passes through the end of the insulating seat, and the other end of the first electric wire passes through the rotating connecting piece and is electrically connected to the arc-shaped contact conductor.

[0024] Preferably, the rotary circuit connector further comprises:

[0025] A special-shaped plug-in part is arranged at the end of the electrical connection protrusion, the two sides of the special-shaped plug-in part are concave and the middle part is convex, the special-shaped plug-in part is adapted to the special-shaped positioning part, and the embedded conductor is placed inside the concave parts on both sides of the special-shaped plug-in part;

[0026] A fixed tube, which is fixedly arranged on the outer wall of the rotating shaft, and the memory spring is placed in the fixed tube;

[0027] A T-shaped sliding rod, one end of which is fixedly connected to the power connection protrusion, and the other end of which is movably inserted into the interior of the fixed tube;

[0028] A retaining ring is fixedly arranged inside the fixed tube, and two ends of the memory spring are respectively against the T-shaped sliding rod and the retaining ring;

[0029] The second electric wire passes through the two sets of fixing tubes, and the two ends of the second electric wire are respectively electrically connected to the embedded conductors on the two sets of electrical connection protrusions.

[0030] Preferably, the circuit control mechanism further includes:

[0031] A fixing plate with a logo, which is threadedly connected to the side wall of the power supply base;

[0032] A rotating handle is rotatably arranged inside the fixed plate with the mark, and a rotating shaft is fixedly connected to the inner side of the rotating handle;

[0033] The positioning baffle is fixedly arranged inside the power supply base, and the end of the rotating shaft is rotatably arranged in the positioning baffle.

[0034] Preferably, a storage groove is opened on the side of the power supply base, a winding seat is installed inside the storage groove, the connecting wire is wound on the outer surface of the winding seat, a rotating baffle is provided on the outer wall of the storage groove, and magnetic strips are provided at the inner bottom end of the rotating baffle and the outer bottom end of the storage groove, and the two groups of magnetic strips are adsorbed and fixed.

[0035] Preferably, the battery is movably plugged into the back of the power supply base, the inner wall of the power supply base is provided with a socket connected to the battery, the back outer wall of the power supply base is rotatably connected with a protective cover, an independent air switch is installed above the battery, and a fixing mechanism is provided on the side of the independent air switch, and the fixing mechanism is used to fix the battery.

[0036] Preferably, the fixing mechanism comprises:

[0037] A push rod, which is movably plugged into the back of the power supply base;

[0038] A wedge-shaped locking block is vertically slidably disposed inside the power supply base;

[0039] A locking spring, which is arranged on the top of the wedge-shaped locking block;

[0040] A top block fixedly disposed on the end of the push rod;

[0041] A triangular top groove is provided on the side of the wedge-shaped locking block, and the top block is movably inserted in the triangular top groove to lift the wedge-shaped locking block upward.

[0042] Preferably, a slot is provided at the top of the battery, the bottom end of the wedge-shaped locking block is movably inserted in the slot, a latch is slidably provided at the top back of the power supply base, a slot is provided at the top of the protective cover, and the latch is movably inserted in the slot.

[0043] Preferably, a power display screen is installed on the front side of the power supply base, a projector placement slot is opened on the top of the power supply base, a strip groove for storing power supply wires is opened on one side of the inner top of the projector placement slot, a slide groove is set in the middle of the projector placement slot, and a foldable projector bracket is installed inside the slide groove.

[0044] Preferably, the foldable projector stand comprises:

[0045] A scissor-folding support arm is arranged inside the projector placement slot;

[0046] A sliding connection bar is slidably arranged inside the slide groove, and the bottom ends of the scissor folding support arms are rotatably arranged on the tops of both sides of the sliding connection bar;

[0047] A bidirectional screw rod is rotatably arranged inside the slide slot;

[0048] A servo motor is fixedly installed inside the slide slot, and an output end of the servo motor is fixedly connected to a bidirectional lead screw;

[0049] The mounting seat is movably hinged to the top end of the scissor-folding support arm, and the mounting seat is used for fixing the projector.

[0050] The present invention discloses a teaching projector power supply device, which has the following beneficial effects:

[0051] 1. The teaching projector power supply device has four groups of electrical connectors numbered a, b, c, and d respectively, wherein a is connected to the discharge end circuit of the battery, b is connected to the power supply wire, c is connected to the connection wire, and d is connected to the charging end circuit of the battery. During the rotation of the rotary circuit connector, when a and b are connected, the projector is powered by the battery; when b and c are connected, the connection wire is inserted into the external circuit to power the projector; when c and d are connected, the connection wire is inserted into the external circuit to charge the battery; so that the power supply device can select an external circuit or a built-in battery for power supply, and can also charge the battery through the connection wire, thereby reducing circuit equipment. At the same time, when the external power supply is performed, the current does not pass through the battery, thereby avoiding the problem of overheating and reduced service life of the battery when it is charged and discharged at the same time.

[0052] 2. The teaching projector power supply device is provided with a projector placement slot on the top of the power supply base, and the mounting base is fixed to the bottom of the projector. By starting the servo motor, the servo motor output shaft rotates clockwise, driving the bidirectional lead screw to rotate, so that the two sets of sliding connection strips slide to both sides. At this time, the scissors-folding support arm rotates and opens, so that the height is reduced, and finally the scissors-folding support arm enters the inside of the slide slot, so that the projector is stored in the projector placement slot. When in use, the servo motor output shaft is controlled to rotate counterclockwise to raise the projector, so that the projector and the power supply base can be stored synchronously, which is convenient for carrying. When in use, the power supply base supports the projector through the scissors-folding support arm, and no additional bracket is needed, which is more convenient.

[0053] 3. In the power supply device of the teaching projector, multiple batteries are connected in parallel, and each group of batteries is provided with an independent air switch. When a certain group of batteries fails, the independent air switch on the top will trip to cut off the circuit of the battery to avoid partial battery damage affecting the overall use. At the same time, when replacing the battery, the protective cover is turned open, and then the push rod is pressed inward to insert the top block into the triangular top groove, and the wedge-shaped locking block is pushed upward to compress the locking spring. At this time, the bottom end of the wedge-shaped locking block is moved out of the slot. At this time, the battery can be directly pulled out, which is convenient for partial battery replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0055] Figure 1 It is a schematic diagram of the overall outer surface structure of the present invention;

[0056] Figure 2 It is a schematic diagram of the overall bottom structure of the present invention;

[0057] Figure 3 This is a schematic diagram of the back structure of the power supply base of the present invention;

[0058] Figure 4 This is an exploded view of the side structure of the power supply base of the present invention;

[0059] Figure 5 It is a schematic diagram of the outer surface structure of the rotary circuit connector of the present invention;

[0060] Figure 6 This is a cross-sectional view of the internal structure of the electrical connector of the present invention;

[0061] Figure 7 A cross-sectional view of the internal structure of the rotary circuit connector of the present invention;

[0062] Figure 8 This is a schematic diagram of the top structure of the power supply base of the present invention;

[0063] Fig. 9 This is a side structural cross-sectional view of the power supply base of the present invention;

[0064] Fig.10 For the present invention Fig. 9 A magnified view of the structure of part A;

[0065] Fig.11 The figure is a schematic diagram of the circuit connection between the rotary circuit connector of the present invention and four sets of electrical terminals.

[0066] In the figure: 1. power supply base; 2. power display screen; 3. circuit control mechanism; 31. fixed plate with identification; 32. rotating handle; 33. positioning plate; 34. power connection head; 341. insulating seat; 342. special-shaped positioning part; 343. rotating connector; 344. arc-shaped contact conductor; 345. first electric wire; 346. sliding top shaft; 347. front convex ball piece; 348. rear convex ball piece; 349. positioning tube; 3410. reset spring; 35. rotary circuit connector; 351. rotating shaft; 352. fixing tube; 353. T-shaped sliding rod; 354. power connection convex piece; 355. special-shaped plug-in part; 356. embedded conductor; 357. memory spring; 358. retaining ring; 359. second electric wire; 4. projector placement slot; 5. folding projector bracket; 51. scissor folding support arm; 52. sliding connecting strip; 53. bidirectional screw rod; 54. servo motor; 55. mounting seat; 6. power supply wire; 7. protective cover; 8. rotating baffle; 9. battery; 10. slot; 11. storage slot; 12. winding seat; 13. connecting wire; 14. magnetic strip; 15. strip groove; 16. slide groove; 17. socket; 18. independent air switch; 19. fixing mechanism; 191. push rod; 192. top block; 193. wedge-shaped locking block; 194. triangular top groove; 195. locking spring; 20. card slot; 21. latch. DETAILED DESCRIPTION

[0067] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0068] The embodiment of the present application provides a teaching projector power supply device to solve the problem that the capacity of the built-in battery is small and the battery life is often insufficient for use. In addition, a direct circuit is often used in the design, that is, the power wire, the battery and the projector are directly connected. When plugged in, the current enters the battery, and then the battery powers the projector, causing the battery to heat up and affecting its life. The external battery is larger in size and needs to be carried separately from the projector when in use, which is inconvenient to use and carry.

[0069] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0070] The embodiment of the invention discloses a power supply device for a teaching projector.

[0071] According to the attached Figure 1-10As shown, it includes a power supply base 1 and a plurality of batteries 9 installed in parallel inside the power supply base 1. A power supply wire 6 for supplying power to the projector is installed on the top of the power supply base 1. A connection wire 13 is arranged on one side of the power supply base 1. A circuit control mechanism 3 is arranged on the other side of the power supply base 1. The circuit control mechanism 3 includes;

[0072] Four groups of electrical terminals 34 are arranged in a circular array on the inner side wall of the power supply base 1, and the four groups of electrical terminals 34 are respectively connected to the power supply wire 6, the connection wire 13, the discharge end of the battery 9 and the charging end of the battery 9;

[0073] A rotary circuit connector 35 disposed in the inner wall of the power supply base 1;

[0074] The rotary circuit connector 35 comprises:

[0075] The rotating shaft 351 is rotatably disposed at the center of the four sets of electrical terminals 34;

[0076] Two sets of electrical connection protrusions 354 are installed perpendicularly to each other on the outer side of the rotating shaft 351. The two sets of electrical connection protrusions 354 are electrically connected. The electrical connection protrusions 354 are used to electrically connect to the electrical connection head 34.

[0077] An embedded conductor 356 is disposed inside the electrical connection protrusion 354;

[0078] A memory spring 357 is disposed between the rotating shaft 351 and the power connection protrusion 354 , and the memory spring 357 is used to push the power connection protrusion 354 toward the power connection head 34 ;

[0079] The electrical connector 34 includes:

[0080] An insulating seat 341, which is fixedly disposed inside the power supply base 1;

[0081] The rotating connecting member 343 is rotatably disposed on both sides of the inner side of the insulating seat 341;

[0082] The sliding top shaft 346 is movably inserted into the interior of the insulating seat 341 , and one end of the sliding top shaft 346 contacts the electrical contact protrusion 354 , and the other end of the sliding top shaft 346 is used to push the rotating connector 343 to rotate until it contacts the embedded conductor 356 .

[0083] The electrical connector 34 also includes:

[0084] The special-shaped positioning portion 342 is disposed at the front end of the insulating seat 341, with two sides of the special-shaped positioning portion 342 protruding and the middle part being concave, and the end of the sliding top shaft 346 passing through the middle part of the special-shaped positioning portion 342;

[0085] The arc-shaped contact conductor 344 is fixedly disposed at the end of the rotating connecting member 343, and the arc-shaped contact conductor 344 passes through both sides of the special-shaped positioning portion 342, and the arc-shaped contact conductor 344 is electrically connected to the embedded conductor 356;

[0086] The front convex ball member 347 and the rear convex ball member 348 are respectively fixedly disposed on the outer surfaces of both ends of the sliding top shaft 346, and the end of the rotating connecting member 343 is disposed between the front convex ball member 347 and the rear convex ball member 348;

[0087] A positioning tube 349, which is fixedly disposed on the inner wall of the insulating seat 341;

[0088] The return spring 3410 is disposed inside the positioning tube 349 , and the end of the sliding top shaft 346 is movably inserted in the positioning tube 349 to abut against the return spring 3410 ;

[0089] The first wire 345 passes through the end of the insulating seat 341 , and the other end of the first wire 345 passes through the rotating connecting member 343 to be electrically connected to the arc-shaped contact conductor 344 .

[0090] The rotary circuit connector 35 also includes;

[0091] The special-shaped plug-in part 355 is arranged at the end of the electrical connection protrusion 354, the two sides of the special-shaped plug-in part 355 are concave and the middle part is convex, the special-shaped plug-in part 355 is adapted to the special-shaped positioning part 342, and the embedded conductor 356 is placed inside the concave parts on both sides of the special-shaped plug-in part 355;

[0092] A fixed tube 352, which is fixedly disposed on the outer wall of the rotating shaft 351, and a memory spring 357 is disposed in the fixed tube 352;

[0093] A T-shaped sliding rod 353, one end of which is fixedly connected to the power connection protrusion 354, and the other end of which is movably inserted into the interior of the fixed tube 352;

[0094] The retaining ring 358 is fixedly disposed inside the fixed tube 352, and the two ends of the memory spring 357 are respectively against the T-shaped sliding rod 353 and the retaining ring 358;

[0095] The second wire 359 passes through the two sets of fixing tubes 352 , and two ends of the second wire 359 are electrically connected to the embedded conductors 356 on the two sets of electrical connection protrusions 354 .

[0096] The circuit control mechanism 3 also includes:

[0097] A fixing plate 31 with a logo, which is threadedly connected to the side wall of the power supply base 1;

[0098] The rotating handle 32 is rotatably arranged inside the marked fixed disk 31, and the rotating shaft 351 is fixedly connected to the inner side of the rotating handle 32. The rotating handle 32 is provided with an arrow mark. In the initial state, the arrow points to the right. The maximum counterclockwise rotation angle is 270 degrees, and three function items are switched;

[0099] The positioning baffle 33 is fixedly disposed inside the power supply base 1 , and the end of the rotating shaft 351 is rotatably disposed in the positioning baffle 33 .

[0100] A storage groove 11 is provided on the side of the power supply base 1, and a winding seat 12 is installed inside the storage groove 11. The connecting wire 13 is wound on the outer surface of the winding seat 12, and a rotating baffle 8 is provided on the outer wall of the storage groove 11. The inner bottom end of the rotating baffle 8 and the outer bottom end of the storage groove 11 are both provided with magnetic strips 14. The two groups of magnetic strips 14 are adsorbed and fixed, which is convenient for winding and storing the connecting wire 13, making it more convenient to carry. When the battery 9 is used as the power supply for the projector, the connecting wire 13 does not need to be taken out, and the overall structure is more concise.

[0101] The battery 9 is movably inserted into the back of the power supply base 1. The inner wall of the power supply base 1 is provided with a socket 17 connected to the battery 9. The outer wall of the back of the power supply base 1 is rotatably connected with a protective cover 7. An independent air switch 18 is installed above the battery 9. A fixing mechanism 19 is provided on the side of the independent air switch 18. The fixing mechanism 19 is used to fix the battery 9.

[0102] The fixing mechanism 19 comprises:

[0103] A push rod 191 is movably plugged into the back of the power supply base 1;

[0104] A wedge-shaped locking block 193 is vertically slidably disposed inside the power supply base 1;

[0105] A locking spring 195 disposed on the top of the wedge-shaped locking block 193;

[0106] A top block 192, which is fixedly disposed on the end of the push rod 191;

[0107] The triangular top groove 194 is provided on the side of the wedge-shaped locking block 193 , and the top block 192 is movably inserted in the triangular top groove 194 to lift the wedge-shaped locking block 193 upward.

[0108] A slot 20 is provided at the top of the battery 9, and the bottom end of the wedge-shaped locking block 193 is movably inserted in the slot 20. A latch 21 is slidably provided on the top back of the power supply base 1, and a slot 10 is provided at the top of the protective cover 7, and the latch 21 is movably inserted in the slot 10.

[0109] A power display screen 2 is installed on the front side of the power supply base 1, a projector placement slot 4 is opened on the top of the power supply base 1, a strip groove 15 for storing the power supply wire 6 is opened on one side of the inner top of the projector placement slot 4, a slide groove 16 is set in the middle of the projector placement slot 4, and a foldable projector bracket 5 is installed inside the slide groove 16.

[0110] The foldable projector stand 5 comprises:

[0111] A scissor-folding support arm 51 is disposed inside the projector placement slot 4;

[0112] The sliding connection bar 52 is slidably disposed inside the slide slot 16, and the bottom ends of the scissor folding support arms 51 are rotatably disposed on the tops of both sides of the sliding connection bar 52;

[0113] A bidirectional screw rod 53 is rotatably arranged inside the slide groove 16, and the thread grooves on the outer surfaces of both ends of the bidirectional screw rod 53 are in opposite directions;

[0114] A servo motor 54 is fixedly mounted inside the slide slot 16, and an output end of the servo motor 54 is fixedly connected to the bidirectional lead screw 53;

[0115] The mounting seat 55 is movably hinged to the top end of the scissor-folding support arm 51 , and the mounting seat 55 is used to fix the projector.

[0116] Working principle: The device is provided with a projector placement slot 4 on the top of the power supply base 1, and the mounting seat 55 is fixed to the bottom of the projector. By starting the servo motor 54, the output shaft of the servo motor 54 rotates clockwise, driving the bidirectional screw rod 53 to rotate, so that the two sets of sliding connection strips 52 slide to both sides. At this time, the scissor folding support arm 51 rotates and stretches, so that the height is reduced, and finally the scissor folding support arm 51 enters the inside of the slide slot 16, so that the projector is stored in the projector placement slot 4. When in use, the output shaft of the servo motor 54 is controlled to rotate counterclockwise to raise the projector, so that the projector and the power supply base 1 can be stored synchronously, which is convenient for carrying. When in use, the power supply base 1 supports the projector through the scissor folding support arm 51, and no additional bracket is needed, which is more convenient.

[0117] When the projector is in use, external power supply or power supply through the battery 9 is selected according to the actual on-site power supply environment. The rotating handle 32 is rotated counterclockwise to drive the rotating shaft 351 to rotate. At this time, the rotating shaft 351 drives the two sets of power connection protrusions 354 on its outer wall to rotate. The power connection protrusions 354 rotate to face the insulating seat 341. At this time, the special-shaped plug-in portion 355 enters the special-shaped positioning portion 342. In this process, when the middle protrusion of the special-shaped plug-in portion 355 contacts the protrusions on both sides of the special-shaped positioning portion 342, the T-shaped sliding rod 353 moves toward the inside of the fixed tube 352. At this time, the memory spring 357 is compressed. When the middle protrusion of the special-shaped plug-in portion 355 enters the concave portion in the middle of the special-shaped positioning portion 342, the memory spring 357 pushes the T-shaped sliding rod 353 outward. The shaped plug-in part 355 is engaged with the shaped positioning part 342. At this time, the middle convex part of the shaped plug-in part 355 is against the sliding top shaft 346, pushing the sliding top shaft 346 inward. At this time, the ends of the two sets of rotating connectors 343 are pushed outward by the front convex ball 347, so that the front end of the rotating connector 343 is turned toward the middle, so that the arc-shaped contact conductor 344 moves outward from the inside of the insulating seat 341. At this time, the arc-shaped contact conductor 344 enters the grooves on both sides of the shaped plug-in part 355 and contacts with the embedded conductor 356 to complete the circuit connection. On the one hand, this design can ensure that the metal conductors are effectively in contact during connection. At the same time, compared with the traditional exposed metal conductors, when the insulating parts rotate and rub against each other, it can effectively avoid the metal conductors from friction, extrusion, deformation and wear, thereby improving their service life.

[0118] As attached Fig.11 As shown, the four groups of electrical connectors 34 are numbered a, b, c, and d respectively. In this embodiment, a is connected to the discharge end circuit of the battery 9, b is connected to the power supply wire 6, c is connected to the connection wire 13, and d is connected to the charging end circuit of the battery 9. During the rotation of the rotary circuit connector 35;

[0119] When phases a and b are connected, the discharge end of the battery 9 is connected to the power supply wire 6, and the projector is powered by the battery 9;

[0120] When phases b and c are connected, the connection wire 13 is connected to the power supply wire 6. At this time, the power supply wire 13 is inserted into the external circuit to power the projector.

[0121] When phases c and d are connected, the charging end of the battery 9 is connected to the connecting wire 13. At this time, the connecting wire 13 is inserted into the external circuit to charge the battery 9.

[0122] Thus, the power supply device can be powered by an external circuit or a built-in battery, and can also be charged by the connecting wire 13 to reduce circuit equipment. At the same time, when the external power supply is performed, the current does not pass through the battery 9, thereby avoiding the problem of overheating and shortening the service life of the battery 9 when it is charged and discharged at the same time.

[0123] The multiple batteries 9 inside the power supply base 1 are connected in parallel, and each group of batteries 9 is provided with an independent air switch 18. When a group of batteries 9 fails, the independent air switch 18 on the top will trip to cut off the circuit of the battery 9 to prevent partial battery damage from affecting the overall use. At the same time, when replacing the battery 9, the protective cover 7 is rotated to open, and then the push rod 191 is pressed inward, so that the top block 192 is inserted into the triangular top groove 194, and the wedge-shaped locking block 193 is pushed upward, so that the locking spring 195 is compressed. At this time, the bottom end of the wedge-shaped locking block 193 is moved out of the slot 20. At this time, the battery 9 can be directly pulled out, which is convenient for replacing some batteries 9.

[0124] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A teaching projector power supply device, comprising a power supply base (1) and a plurality of storage batteries (9) arranged in parallel inside the power supply base (1), a power supply wire (6) for supplying power to the projector is installed on the top of the power supply base (1), and a connection wire (13) is arranged on one side of the power supply base (1), characterized in that: A circuit control mechanism (3) is provided on the other side of the power supply base (1), and the circuit control mechanism (3) comprises: Four groups of power connection heads (34), the four groups of power connection heads (34) being arranged in a ring array on the inner side wall of the power supply base (1), the four groups of power connection heads (34) being respectively connected to the power supply wire (6), the connection wire (13), the discharge end of the storage battery (9) and the charging end of the storage battery (9); A rotary circuit connector (35) disposed in the inner side wall of the power supply base (1); The rotary circuit connector (35) comprises: A rotating shaft (351) is rotatably disposed at the center of the four sets of electrical connectors (34); Two groups of electrical connection protrusions (354) are installed perpendicularly to each other on the outside of the rotating shaft (351), the two groups of electrical connection protrusions (354) are electrically connected, and the electrical connection protrusions (354) are used to electrically connect to the electrical connection head (34); An embedded conductor (356) is arranged inside the electrical connection protrusion (354); A memory spring (357) is disposed between the rotating shaft (351) and the power connection protrusion (354), and the memory spring (357) is used to push the power connection protrusion (354) toward the power connection head (34); The electrical connector (34) comprises: An insulating seat (341) fixedly disposed inside the power supply base (1); A rotating connecting member (343) is rotatably disposed on both sides of the interior of the insulating seat (341); A sliding top shaft (346) is movably inserted into the interior of the insulating seat (341), one end of the sliding top shaft (346) is in contact with the electrical connection convex part (354), and the other end of the sliding top shaft (346) is used to push the rotating connecting part (343) to rotate until it contacts the embedded conductor (356); The power connector (34) also includes: A special-shaped positioning portion (342) is arranged at the front end of the insulating seat (341), the two sides of the special-shaped positioning portion (342) are convex and the middle part is concave, and the end of the sliding top shaft (346) passes through the middle part of the special-shaped positioning portion (342); An arc-shaped contact conductor (344) is fixedly disposed at the end of the rotating connecting member (343), and the arc-shaped contact conductor (344) penetrates both sides of the special-shaped positioning portion (342), and the arc-shaped contact conductor (344) is electrically connected to the embedded conductor (356); A front convex ball component (347) and a rear convex ball component (348) are respectively fixedly disposed on the outer surfaces of both ends of the sliding top shaft (346), and the end of the rotating connecting component (343) is disposed between the front convex ball component (347) and the rear convex ball component (348); A positioning tube (349) fixedly disposed on the inner wall of the insulating seat (341); A return spring (3410) is disposed inside the positioning tube (349), and the end of the sliding top shaft (346) is movably inserted in the positioning tube (349) to abut against the return spring (3410); A first electric wire (345) passes through the end of the insulating seat (341), and the other end of the first electric wire (345) passes through the rotating connecting piece (343) and is electrically connected to the arc-shaped contact conductor (344); The rotary circuit connector (35) further comprises: A special-shaped plug-in portion (355) is arranged at the end of the electrical connection protrusion (354), the special-shaped plug-in portion (355) is concave on both sides and convex in the middle, the special-shaped plug-in portion (355) is matched with the special-shaped positioning portion (342), and the embedded conductor (356) is placed inside the concave portions on both sides of the special-shaped plug-in portion (355); A fixed tube (352) fixedly disposed on the outer wall of the rotating shaft (351), wherein the memory spring (357) is disposed in the fixed tube (352); A T-shaped sliding rod (353), one end of which is fixedly connected to the power connection protrusion (354), and the other end of which is movably inserted into the interior of the fixed tube (352); A retaining ring (358) is fixedly disposed inside the fixed tube (352), and two ends of the memory spring (357) are respectively against the T-shaped sliding rod (353) and the retaining ring (358); The second electric wire (359) passes through the two sets of fixed tubes (352), and the two ends of the second electric wire (359) are respectively electrically connected to the embedded conductors (356) on the two sets of electrical connection protrusions (354).

2. A teaching projector power supply device according to claim 1, characterized in that: The circuit control mechanism (3) further comprises: A fixing plate (31) with a logo, which is threadedly connected to the side wall of the power supply base (1); A rotating handle (32) is rotatably disposed inside the marking fixed disk (31), and a rotating shaft (351) is fixedly connected to the inner side of the rotating handle (32); The positioning baffle (33) is fixedly arranged inside the power supply base (1), and the end of the rotating shaft (351) is rotatably arranged in the positioning baffle (33).

3. The teaching projector power supply device according to claim 1, characterized in that: A storage groove (11) is provided on the side of the power supply base (1), a winding seat (12) is installed inside the storage groove (11), the connecting wire (13) is wound on the outer surface of the winding seat (12), a rotating baffle (8) is provided on the outer wall of the storage groove (11), and magnetic strips (14) are provided at the inner bottom end of the rotating baffle (8) and the outer bottom end of the storage groove (11), and two groups of magnetic strips (14) are adsorbed and fixed.

4. The teaching projector power supply device according to claim 1, characterized in that: The storage battery (9) is movably plugged into the back of the power supply base (1); the inner wall of the power supply base (1) is provided with a socket (17) connected to the storage battery (9); the outer wall of the back of the power supply base (1) is rotatably connected with a protective cover (7); an independent air switch (18) is installed above the storage battery (9); a fixing mechanism (19) is provided on the side of the independent air switch (18); the fixing mechanism (19) is used to fix the storage battery (9).

5. A teaching projector power supply device according to claim 4, characterized in that: The fixing mechanism (19) comprises: A push rod (191) movably plugged into the back of the power supply base (1); A wedge-shaped locking block (193) vertically slidably disposed inside the power supply base (1); A locking spring (195) disposed on the top of the wedge-shaped locking block (193); A top block (192) fixedly disposed on the end of the push rod (191); The triangular top groove (194) is formed on the side of the wedge-shaped locking block (193), and the top block (192) is movably inserted into the inside of the triangular top groove (194) to lift the wedge-shaped locking block (193) upward.

6. A teaching projector power supply device according to claim 5, characterized in that: The top of the storage battery (9) is provided with a slot (20), the bottom of the wedge-shaped locking block (193) is movably inserted into the slot (20), a latch (21) is slidably provided on the top of the back of the power supply base (1), and the top of the protection cover (7) is provided with a slot (10), and the latch (21) is movably inserted into the slot (10).

7. The teaching projector power supply device according to claim 1, characterized in that: A power display screen (2) is installed on the front side of the power supply base (1), a projector placement slot (4) is provided on the top of the power supply base (1), a strip slot (15) for storing a power supply wire (6) is provided on one side of the inner top of the projector placement slot (4), a slide slot (16) is provided in the middle of the projector placement slot (4), and a foldable projector bracket (5) is installed inside the slide slot (16).

8. A teaching projector power supply device according to claim 7, characterized in that: The foldable projector bracket (5) comprises: A scissor-folding support arm (51) disposed inside the projector placement slot (4); A sliding connection bar (52) is slidably disposed inside the slide groove (16), and the bottom ends of the scissor folding support arms (51) are rotatably disposed on the tops of both sides of the sliding connection bar (52); A bidirectional screw rod (53) rotatably disposed inside the slide groove (16); A servo motor (54) is fixedly mounted inside the slide groove (16), and an output end of the servo motor (54) is fixedly connected to the bidirectional lead screw (53); A mounting seat (55) is movably hinged to the top end of the scissor-folding support arm (51), and the mounting seat (55) is used to fix the projector.

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