A projection device with convenient height adjustment

Abstract

The present invention relates to the technical field of projection equipment, and discloses a projection device that is convenient to adjust the height, including a balance frame, a traction rope is slidably connected to the outside of the balance frame, a rotating tube is fixedly connected to the right end of the traction rope, a support rod is rotatably connected to the inside of the rotating tube, a hand-cranked limit plate is fixedly connected to the left side of the rotating tube, a balance board is fixedly connected to the left end of the traction rope, a fixed main pipe is fixedly connected to the bottom of the balance board, and balance rods are fixedly connected to the left and right sides of the fixed main pipe. The projection device that is convenient to adjust the height is convenient for users to adjust the use height and angle of the projection box according to the use situation, which is convenient for users to use and adjust, reduces the difficulty of adjustment operation, saves a lot of manpower for climbing and adjustment, brings many conveniences to projection explanation teaching, improves the use efficiency of the projection device, and improves the work efficiency of projection explanation teaching.

Description

Technical Field

[0001] The invention relates to the technical field of projection equipment, and in particular to a projection device with convenient height adjustment. Background Art

[0002] A projector, also known as a projector, is a device that can project images or videos onto a screen. It can be connected to computers, VCDs, DVDs, BDs, game consoles, DVs, etc. through different interfaces to play corresponding video signals. Projectors are currently widely used in homes, offices, schools, and entertainment venues. Depending on the working method, there are different types such as CRT, LCD, DLP, etc.

[0003] The existing projection device is fixedly installed on the roof by a projector fixing frame, but the common projector fixing frame only has the function of installing and fixing the projector, and cannot adjust the use height or angle of the projector according to different usage conditions, which brings many inconveniences to users in use, increases the difficulty of operation for users, and consumes a lot of energy of users. Therefore, a projection device with convenient height adjustment is proposed to solve the above-mentioned problems. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a projection device with convenient height adjustment, which has the advantages of being able to facilitate users to adjust the height and angle of the projector, and solves the problem that the existing projection devices are difficult to adjust in height, causing many inconveniences to users.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of enabling users to conveniently adjust the height and angle of the projector, the present invention provides the following technical solutions: a projection device that is convenient to adjust the height, comprising a balance frame, a traction rope is slidably connected to the outer side of the balance frame, the right end of the traction rope is fixedly connected to a rotating tube, the interior of the rotating tube is rotatably connected to a support rod, the left side of the rotating tube is fixedly connected to a hand-cranked limiting plate, the left end of the traction rope is fixedly connected to a balance board, the bottom of the balance board is fixedly connected to a fixed main pipe, the left and right sides of the fixed main pipe are fixedly connected to a balance rod, the interior of the fixed main pipe is slidably connected to a slider, the bottom of the slider is fixedly connected to an extension rod, and the extension rod is fixedly connected to the bottom of the slider. The left side of the extension rod is fixedly connected with a groove bar, the left side of the groove bar is movably connected with a tightening bolt, the bottom of the extension rod is fixedly connected with a limiting block, the outer side of the bottom of the extension rod is movably connected with a hollow rotating ball, sliding holes are opened on the left and right sides of the bottom of the hollow rotating ball, the sliding hole is slidably connected with a connecting slide bar, the top of the connecting slide bar is fixedly connected with a card ball, the bottom of the connecting slide bar is fixedly connected with a connecting block, the bottom of the connecting block is fixedly connected with a clamping rod, two shadow box clamps are fixedly connected to the opposite sides of the two clamping rods, a spring is fixedly connected between the two clamping rods, and a projection box is movably connected between the shadow box clamps on the left and right sides.

[0008] Preferably, the balancing frame is composed of two vertical rods and a horizontal rod, and the traction rope is located between the two vertical rods, and the left end of the traction rope is fixedly connected to both sides of the top of the balancing board in a Y shape.

[0009] Preferably, the left end of the support rod passes through the rotating tube and the hand-cranked limit plate in sequence and extends to the left side of the hand-cranked limit plate. The left end of the support rod is fixedly connected to the limit plate, and the diameter of the limit plate is larger than the diameter of the pipe mouth of the rotating tube.

[0010] Preferably, the hand-cranked limit plate consists of a limit plate and a hand-cranked lever perpendicular to the limit plate, the right end of the traction rope is wrapped around the outside of the rotating tube, and the top end of the balance rod is fixedly connected to the left and right sides of the bottom of the balance board.

[0011] Preferably, the bottom end of the balance rod passes through the fixed main pipe and the hollow rotating ball in sequence and extends to the limit block, the length of the groove is smaller than the length of the fixed main pipe, an extension hole is provided at the bottom of the fixed main pipe, and the length of the extension hole is equal to the sum of the widths of the extension rod and the groove, and the length and width of the slider are both larger than the length and width of the extension hole.

[0012] Preferably, the right end of the tightening bolt passes through the fixed main pipe and extends to the left side of the groove bar, the limit block is circular, and its diameter is larger than the radius of the hollow rotating ball and smaller than the diameter of the hollow rotating ball, the diameter of the locking ball is larger than the width of the sliding hole, and the locking ball is located inside the hollow rotating ball.

[0013] Preferably, the connecting block is located outside the hollow rotating ball, the length of the clamping rod is equal to the length of the projection box, the two shadow box clamps on the left and right sides are located on the front and back sides of the clamping rod opposite to each other, heat dissipation holes are provided on the left and right sides of the projection box, and a projection lens is fixedly installed on the front side of the projection box.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the present invention provides a projection device with convenient height adjustment, which has the following beneficial effects:

[0016] 1. The projection device with convenient height adjustment is used by the coordinated use of the balance frame, traction rope, rotating tube, support rod, hand-cranked limit plate, balance plate, fixed main tube, balance rod, slider, extension rod, groove bar and tightening bolt. When the projection box is lowered, the extension length of the extension rod is adjusted up and down to fine-tune the projector, so that the user can adjust the height of the projection box up and down by turning the traction rope according to the use situation, which solves the trouble of the user not being able to adjust the height during use, facilitates the use and adjustment of the user, reduces the difficulty of the adjustment operation, saves a lot of manpower for climbing and adjusting, and brings many conveniences to projection explanation and teaching.

[0017] 2. The projection device with convenient height adjustment facilitates the installation of the projection box through the coordinated use of the limit block, hollow rotating ball, sliding hole, connecting slide bar, card ball, connecting block, clamp rod, shadow box clamp, spring and projection box, and facilitates the adjustment of the use angle of the projection box according to different usage scenarios and situations, which greatly facilitates the use of the user, improves the use efficiency of the projection device, and improves the work efficiency of projection explanation teaching. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the structure of the present invention;

[0019] Figure 2 It is a partial enlarged schematic diagram of part A in the structure of the present invention.

[0020] In the figure: 1 balance frame, 2 traction rope, 3 rotating tube, 4 support rod, 5 hand-cranked limit plate, 6 balance plate, 7 fixed main pipe, 8 balance rod, 9 slider, 10 extension rod, 11 groove bar, 12 tightening bolt, 13 limit block, 14 hollow rotating ball, 15 sliding hole, 16 connecting slide bar, 17 card ball, 18 connecting block, 19 clamping rod, 20 shadow box clamp, 21 spring, 22 projection box. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0022] See also Figure 1-2The present invention provides a technical solution: a projection device with convenient height adjustment, comprising a balance frame 1, a traction rope 2 is slidably connected to the outer side of the balance frame 1, the balance frame 1 is composed of two vertical rods and a horizontal rod, and the traction rope 2 is located between the two vertical rods, the right end of the traction rope 2 is fixedly connected to a rotating tube 3, the right end of the traction rope 2 is wrapped around the outer side of the rotating tube 3, the inner part of the rotating tube 3 is rotatably connected to a support rod 4, the left end of the support rod 4 is fixedly connected to a limiting plate, and the diameter of the limiting plate is larger than the diameter of the tube mouth of the rotating tube 3, the left side of the rotating tube 3 is fixedly connected to a hand-cranked limiting plate 5, the hand-cranked limiting plate 5 is composed of a limiting plate and a hand-cranked rod perpendicular to the limiting plate, the left end of the support rod 4 sequentially penetrates the rotating tube 3 and the hand-cranked limiting plate 5 and extends to the left side of the hand-cranked limiting plate 5, the left end of the traction rope 2 The end is fixedly connected with a balance board 6, the left end of the traction rope 2 is fixedly connected to the two sides of the top of the balance board 6 in a Y shape, the bottom of the balance board 6 is fixedly connected with a fixed main pipe 7, the left and right sides of the fixed main pipe 7 are fixedly connected with a balance rod 8, the top of the balance rod 8 is fixedly connected to the left and right sides of the bottom of the balance board 6, the inside of the fixed main pipe 7 is slidably connected with a slider 9, the bottom of the slider 9 is fixedly connected with an extension rod 10, the left side of the extension rod 10 is fixedly connected with a groove 11, the length of the groove 11 is less than the length of the fixed main pipe 7, an extension hole is provided at the bottom of the fixed main pipe 7, and the length of the extension hole is equal to the sum of the widths of the extension rod 10 and the groove 11, the length and width of the slider 9 are both greater than the length and width of the extension hole, and the left side of the groove 11 is movably connected with a tightening bolt 12, which is tightened The right end of the bolt 12 passes through the fixed main pipe 7 and extends to the left side of the groove 11. Through the coordinated use of the set balance frame 1, traction rope 2, rotating pipe 3, support rod 4, hand-cranked limit plate 5, balance plate 6, fixed main pipe 7, balance rod 8, slider 9, extension rod 10, groove 11 and tightening bolt 12, when the projection box 22 is lowered, the extension length of the extension rod 10 is adjusted up and down to fine-tune the projector, which is convenient for the user to rotate the traction rope 2 to adjust the height of the projection box 22 up and down according to the use situation, which solves the trouble of the user not being able to adjust the height during use, facilitates the use and adjustment of the user, reduces the difficulty of the adjustment operation, saves a lot of manpower for climbing and adjusting, and brings many conveniences to the projection explanation teaching. The bottom of the extension rod 10 is fixed A limited block 13 is fixedly connected, and a hollow rotating ball 14 is movably connected to the outer side of the bottom of the extension rod 10. The bottom end of the balance rod 8 passes through the fixed main pipe 7 and the hollow rotating ball 14 in sequence and extends to the limit block 13. The limit block 13 is circular, and its diameter is larger than the radius of the hollow rotating ball 14 and smaller than the diameter of the hollow rotating ball 14. Sliding holes 15 are provided on the left and right sides of the bottom of the hollow rotating ball 14. A connecting slide 16 is slidably connected inside the sliding hole 15. A card ball 17 is fixedly connected to the top of the connecting slide 16. The diameter of the card ball 17 is larger than the width of the sliding hole 15. The card ball 17 is located inside the hollow rotating ball 14. A connecting block 18 is fixedly connected to the bottom of the connecting slide 16. The connecting block 18 is located outside the hollow rotating ball 14. A clamping rod 19 is fixedly connected to the bottom of the connecting block 18.Two shadow box clips 20 are fixedly connected to the opposite sides of the two clamping rods 19. The two shadow box clips 20 on the left and right sides are located on the front and back sides of the opposite sides of the clamping rods 19. A spring 21 is fixedly connected between the two clamping rods 19. A projection box 22 is movably connected between the shadow box clips 20 on the left and right sides. The length of the clamping rod 19 is equal to the length of the projection box 22. Heat dissipation holes are provided on the left and right sides of the projection box 22, and a projection lens is fixedly installed on the front of the projection box 22. The installation of the projection box 22 is facilitated by the coordinated use of the set limit block 13, the hollow rotating ball 14, the sliding hole 15, the connecting slide 16, the card ball 17, the connecting block 18, the clamping rod 19, the shadow box clip 20, the spring 21 and the projection box 22. At the same time, it is convenient to adjust the use angle of the projection box 22 according to different use scenarios and situations, which greatly facilitates the use of the user, improves the use efficiency of the projection device, and improves the work efficiency of projection teaching.

[0023] When in use, the hand crank on the crank limit plate 5 is held by hand to rotate the rotating tube 3 to make the traction rope 2 rotate around the rotating tube 3. Under the action of the traction rope 2, the height of the pull-up balance plate 6 is adjusted up and down, and the projection box 22 connected to the bottom of the fixed main pipe 7 under the balance plate 6 is driven to move up and down, and the tightness of the tightening bolt 12 and the groove bar 11 is adjusted. The extension rod 10 is moved in the fixed main pipe 7 through the slider 9, and the extension length of the extension rod 10 is adjusted. According to the limit block 13 and the card ball 17 in the hollow rotating ball 14, and the connecting block 18 on the card ball 17, the extension rod 10 is connected to the clamping rod 19 on the shadow box clamp 20, and the use height and angle of the projection box 22 can be fine-tuned.

[0024] In summary, the projection device with convenient height adjustment, through the coordinated use of the balance frame 1, traction rope 2, rotating tube 3, support rod 4, hand-cranked limit plate 5, balance plate 6, fixed main pipe 7, balance rod 8, slider 9, extension rod 10, groove bar 11 and tightening bolt 12, when the projection box 22 is lowered, the extension length of the extension rod 10 is adjusted up and down to fine-tune the projector, so that the user can adjust the height of the projection box 22 up and down by turning the traction rope 2 according to the usage situation, which solves the trouble of the user not being able to adjust the height during use, facilitates the user's use and adjustment, reduces the difficulty of the adjustment operation, saves a lot of manpower for climbing and adjusting, and brings many conveniences to projection explanation and teaching.

[0025] In addition, by means of the coordinated use of the limit block 13, the hollow rotating ball 14, the sliding hole 15, the connecting slide bar 16, the locking ball 17, the connecting block 18, the clamping rod 19, the shadow box clamp 20, the spring 21 and the projection box 22, the installation of the projection box 22 is facilitated, and the use angle of the projection box 22 can be adjusted according to different usage scenarios and situations, which greatly facilitates the use of the user, improves the use efficiency of the projection device, and improves the work efficiency of projection explanation teaching, thereby solving the problem that the existing projection device is difficult to adjust the height, which brings many inconveniences to the user.

[0026] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A projection device with convenient height adjustment, comprising a balancing frame (1), characterized in that: The outer side of the balancing frame (1) is slidably connected with a traction rope (2), the right end of the traction rope (2) is fixedly connected with a rotating tube (3), the interior of the rotating tube (3) is rotatably connected with a support rod (4), the left side of the rotating tube (3) is fixedly connected with a hand-cranked limiting plate (5), the left end of the traction rope (2) is fixedly connected with a balancing plate (6), the bottom of the balancing plate (6) is fixedly connected with a fixed main pipe (7), the left and right sides of the fixed main pipe (7) are fixedly connected with a balancing rod (8), the interior of the fixed main pipe (7) is slidably connected with a slider (9), the bottom of the slider (9) is fixedly connected with an extension rod (10), the left side of the extension rod (10) is fixedly connected with a groove bar (11), the left side of the groove bar (11) is movably connected with a tightening bolt (12), and the extension rod (10) is fixedly connected with a groove bar (11). The bottom of the extension rod (10) is fixedly connected to a limit block (13), the outer side of the bottom of the extension rod (10) is movably connected to a hollow rotating ball (14), the left and right sides of the bottom of the hollow rotating ball (14) are provided with sliding holes (15), the inside of the sliding hole (15) is slidably connected to a connecting slide (16), the top of the connecting slide (16) is fixedly connected to a clamping ball (17), the bottom of the connecting slide (16) is fixedly connected to a connecting block (18), the bottom of the connecting block (18) is fixedly connected to a clamping rod (19), the two sides of the two clamping rods (19) are fixedly connected to two shadow box clamps (20), a spring (21) is fixedly connected between the two clamping rods (19), and a projection box (22) is movably connected between the left and right shadow box clamps (20); The bottom end of the balancing rod (8) passes through the fixed main pipe (7) and the hollow rotating ball (14) in sequence and extends to the limit block (13); the length of the groove (11) is less than the length of the fixed main pipe (7); an extension hole is provided at the bottom of the fixed main pipe (7); and the length of the extension hole is equal to the sum of the widths of the extension rod (10) and the groove (11); the length and width of the sliding block (9) are both greater than the length and width of the extension hole; The right end of the tightening bolt (12) passes through the fixed main pipe (7) and extends to the left side of the groove (11); the limit block (13) is circular, with a diameter greater than the radius of the hollow rotating ball (14) and smaller than the diameter of the hollow rotating ball (14); the diameter of the clamping ball (17) is greater than the width of the sliding hole (15), and the clamping ball (17) is located inside the hollow rotating ball (14).

2. A projection device with convenient height adjustment according to claim 1, characterized in that: The balancing frame (1) is composed of two vertical bars and a horizontal bar, and the traction rope (2) is located between the two vertical bars. The left end of the traction rope (2) is fixedly connected to the two sides of the top of the balancing board (6) in a Y shape.

3. The projection device with convenient height adjustment according to claim 1, characterized in that: The left end of the support rod (4) passes through the rotating tube (3) and the hand-cranked limiting plate (5) in sequence and extends to the left side of the hand-cranked limiting plate (5); the left end of the support rod (4) is fixedly connected to the limiting plate, and the diameter of the limiting plate is larger than the diameter of the tube mouth of the rotating tube (3).

4. The projection device with convenient height adjustment according to claim 1, characterized in that: The hand-cranked limit plate (5) is composed of a limit plate and a hand-cranked lever perpendicular to the limit plate. The right end of the traction rope (2) is wound around the outside of the rotating tube (3). The top end of the balance rod (8) is fixedly connected to the left and right sides of the bottom of the balance plate (6).

5. The projection device with convenient height adjustment according to claim 1, characterized in that: The connecting block (18) is located outside the hollow rotating ball (14); the length of the clamping rod (19) is equal to the length of the projection box (22); the two shadow box clamps (20) on the left and right sides are located on the front and back sides of the clamping rod (19) opposite to each other; heat dissipation holes are provided on the left and right sides of the projection box (22); and a projection lens is fixedly mounted on the front side of the projection box (22).

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