Bookstore projection rack

Abstract

The utility model belongs to the technical field of projection instrument auxiliary devices, and particularly relates to a bookstore projection frame which comprises a balance weight chassis, a fixing sleeve rod is fixedly connected to the upper side of the balance weight chassis, a telescopic rod is movably connected to the upper side of the fixing sleeve rod in an inserted mode, and a mounting plate is fixedly connected to the upper side of the telescopic rod. A first mounting groove is formed in the upper side of the mounting plate, the front wall and the rear wall of the first mounting groove are rotationally connected with bidirectional lead screws, second mounting grooves are formed in the upper side face of the mounting plate in a bilateral symmetry mode, and the left wall and the right wall of the inner side of each second mounting groove are rotationally connected with lead screws. In the prior art, the projection instrument is usually exposed outside, a fixing and limiting structure for the projection instrument is simple, the fixing strength is insufficient, and the protection performance for the projection instrument is insufficient; the problems that when an existing projection frame is erected, a fixing structure cannot be adjusted according to projection instruments of different specifications, and the positions of the projection instruments cannot be finely adjusted to be used in cooperation with a protection structure are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of projector auxiliary devices, in particular to a library projection stand. Background Art

[0002] A projector is a professional device that provides image and video display functions on a screen or wall through projection projection. It is often used in conferences, podiums, study rooms and other places to project images and play videos. When the projector is in use, a projection stand is required to set up the projector.

[0003] When setting up an existing projection stand, the projector is often exposed to the outside. The fixing and limiting structure of the projector is relatively simple, the fixing strength is insufficient, and the protection of the projector is insufficient. The projector may be damaged due to some unexpected bumps. There are many types of projectors with different specifications. When setting up an existing projection stand, it is impossible to adjust the fixing structure according to projectors of different specifications, and it is impossible to fine-tune the position of the projector to cooperate with the use of the protective structure. Utility Model Content

[0004] The purpose of the utility model is to provide a projection stand for a library, so as to solve the problems mentioned in the above background technology that the existing projection stands often expose the projector when being set up, the fixing and limiting structure of the projector is relatively simple, the fixing strength is insufficient, and the protection of the projector is insufficient; when the existing projection stands are set up, the fixing structure cannot be adjusted according to projectors of different specifications, and the position of the projector cannot be fine-tuned to cooperate with the use of the protective structure.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a library projection stand comprises a counterweight chassis, the upper side of the counterweight chassis is fixedly connected to a fixed sleeve rod, the upper side of the fixed sleeve rod is movably inserted with a telescopic rod, the upper side of the telescopic rod is fixedly connected to a mounting plate, the upper side of the mounting plate is provided with a first mounting slot, the front and rear walls of the first mounting slot are rotatably connected with a two-way screw rod, the upper side surface of the mounting plate is symmetrically provided with a second mounting slot, the left and right walls of the inner side of the second mounting slot are rotatably connected with a screw rod, the outer side of the two-way screw rod is symmetrically movably screwed with a first clamping plate, the outer sides of the screw rods on the left and right sides are movably screwed with a second clamping plate, the first clamping plate and the second clamping plate are both located on the upper side of the mounting plate, the rear side of the mounting plate is rotatably connected with a first adjusting knob, and the left and right sides of the mounting plate are rotatably connected with a second adjusting knob.

[0006] Preferably, the front end of the first adjusting knob is fixedly connected to the rear end of the bidirectional screw rod, and the opposite ends of the second adjusting knobs on the left and right sides are fixedly connected to the opposite ends of the screw rod.

[0007] Preferably, an adjusting bolt is threadedly connected to the top of the outer side of the fixed sleeve rod, and one end of the adjusting bolt located on the inner side of the fixed sleeve rod abuts against the outer side of the telescopic rod.

[0008] Preferably, a fixing piece is fixedly sleeved on the outer side of the fixing sleeve rod, the fixing piece is located below the adjusting bolt, and supporting feet are fixedly connected to the outer sides of the fixing piece, and a rubber foot is fixedly connected to the lower end of the supporting foot.

[0009] Preferably, screws are inserted through the four corners of the upper side of the mounting plate, a fixing cover is fixedly connected to the upper side of the screw, the fixing cover corresponds to the mounting plate, an adjusting nut is movably screwed on the outer side of the screw, and the adjusting nut is located below the mounting plate.

[0010] Preferably, pressure plate springs are fixedly connected to the top four corners of the inner side of the fixed cover, a pressure plate is fixedly connected to the lower end of the pressure plate spring, the outer side of the pressure plate is slidably connected to the inner wall of the fixed cover, a damping groove is opened on the front side of the fixed cover, and a focusing piece is slidably connected to the inner side of the damping groove.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1) When the device is in use, after lifting the telescopic rod to the use height, fix it with the adjusting bolt, then place the projector on the upper side of the mounting plate, then respectively rotate the first adjusting knob and the second adjusting knob to rotate the bidirectional screw and the screw, manipulate the first clamping plate and the second clamping plate to clamp the projector, then pull down the fixing cover so that the pressure plate on the lower side of the pressure plate spring presses the projector. This design can make the projector firmly fixed and highly protective.

[0013] 2) When facing projectors of different specifications, the device can achieve a better clamping effect on projectors of different specifications by rotating the first adjustment knob and the second adjustment knob respectively. Then, the focusing piece in the damping slide groove is adjusted to the projection structure position of the projector. Then, the projector can be translated left and right through the relative adjustment of the two second adjustment knobs. By fine-tuning the position of the projector, the radiation structure of the projector is aligned with the focusing piece, which plays the role of cooperating with the protective structure. There is no need to manually open the device for adjustment, and the accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model when viewed from above;

[0016] Figure 3 It is a schematic diagram of the three-dimensional structure of the mounting plate;

[0017] Figure 4 It is a schematic diagram of the fixed cover structure when viewed from above.

[0018] In the figure: 1. counterweight chassis, 2. fixed sleeve rod, 3. telescopic rod, 4. mounting plate, 5. first mounting slot, 6. bidirectional screw rod, 7. second mounting slot, 8. screw rod, 9. first clamping plate, 10. second clamping plate, 11. first adjusting knob, 12. second adjusting knob, 13. adjusting bolt, 14. fixing part, 15. support foot, 16. rubber foot, 17. screw rod, 18. fixing cover, 19. adjusting nut, 20. pressure plate spring, 21. pressure plate, 22. damping slide groove, 23. focusing part. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] Example:

[0022] See also Figure 1-4The utility model provides a technical solution: a projection stand for a book room, comprising a counterweight chassis 1, wherein the counterweight chassis 1 cooperates with the support legs 15 so that the projection stand is fixedly placed on the ground, a fixed sleeve rod 2 is fixedly connected to the upper side of the counterweight chassis 1, a telescopic rod 3 is movably inserted on the upper side of the fixed sleeve rod 2, the telescopic rod 3 is used to adjust the height of the device, a mounting plate 4 is fixedly connected to the upper side of the telescopic rod 3, a first mounting groove 5 is provided on the upper side of the mounting plate 4, a bidirectional screw rod 6 is rotatably connected to the front and rear walls of the first mounting groove 5, a second mounting groove 7 is symmetrically provided on the upper side of the mounting plate 4, and a screw rod 8 is rotatably connected to the left and right walls inside the second mounting groove 7, The outer side of the bidirectional screw rod 6 is symmetrically and movably screwed with a first clamping plate 9, and the outer sides of the left and right side screw rods 8 are movably screwed with a second clamping plate 10. The first clamping plate 9 and the second clamping plate 10 are both located on the upper side of the mounting plate 4. The rear side of the mounting plate 4 is rotatably connected with a first adjusting knob 11. When the first adjusting knob 11 is rotated, the bidirectional screw rod 6 is driven to rotate, and the two first clamping plates 9 are adjusted to clamp the front and rear ends of the projector. The left and right sides of the mounting plate 4 are rotatably connected with second adjusting knobs 12. When the two second adjusting knobs 12 are rotated, the screw rod 8 is driven to rotate, and the two second clamping plates 10 are adjusted to clamp the left and right ends of the projector.

[0023] Among them, the front end of the first adjusting knob 11 is fixedly connected to the rear end of the bidirectional screw rod 6, the opposite ends of the second adjusting knobs 12 on the left and right sides are fixedly connected to the opposite ends of the screw rod 8, the outer top of the fixed sleeve rod 2 is screwed with an adjusting bolt 13, and the adjusting bolt 13 is located at one end of the inner side of the fixed sleeve rod 2 and abuts against the outer side of the telescopic rod 3. The telescopic rod 3 is lifted to the use height, and the adjusting bolt 13 is rotated to abut the telescopic rod 3 and fix it. A fixing piece 14 is fixedly sleeved on the outer side of the fixed sleeve rod 2. The fixing piece 14 is located below the adjusting bolt 13. Support feet 15 are fixedly connected to the outer side of the fixing piece 14. The lower end of the support foot 15 is fixedly connected to a rubber foot 16. Screws 17 are inserted through the four corners of the upper side of the mounting plate 4. A fixing cover 18 is fixedly connected to the upper side of the screw 17. The fixing cover 18 corresponds to the mounting plate 4. The screw 1 The outer side of 7 is movably screwed with an adjusting nut 19, and the adjusting nut 19 is located below the mounting plate 4. After the fixed cover 18 sinks to the upper side of the mounting plate 4, the adjusting nut 19 is rotated to fix the fixed cover 18. When the fixed cover 18 rises, the adjusting nut 19 is used to limit the position to prevent the fixed cover 18 from detaching. The top four corners of the inner side of the fixed cover 18 are fixedly connected with a pressure plate spring 20, and the lower end of the pressure plate spring 20 is fixedly connected with a pressure plate 21. The outer side of the pressure plate 21 is slidably connected to the inner wall of the fixed cover 18, and the pressure plate 21 on the lower side of the pressure plate spring 20 presses the projector. A damping groove 22 is provided on the front side of the fixed cover 18, and a focusing piece 23 slides inside it, and ventilation and heat dissipation of the device are also utilized. The inner side of the damping groove 22 is slidably connected with a focusing piece 23, and a focusing lens is arranged inside the focusing piece 23, so that the projection effect is better.

[0024] Working principle: When in use, lift the telescopic rod 3 to the use height, rotate the adjusting bolt 13 to abut the telescopic rod 3 and fix it, and through the cooperation of the counterweight chassis 1 and the supporting feet 15, the projection frame is fixed on the ground, and then the projector is placed on the upper side of the mounting plate 4, and then the first adjusting knob 11 is rotated to drive the bidirectional screw 6 to rotate, and the two first clamping plates 9 are adjusted to clamp the front and rear ends of the projector, and then the two second adjusting knobs 12 are rotated to adjust the two second clamping plates 10 to clamp the left and right ends of the projector. Clamp the projector, then sink the fixed cover 18 to the upper side of the mounting plate 4, rotate the adjusting nut 19 to fix the fixed cover 18, at this time, the pressure plate 21 on the lower side of the pressure plate spring 20 presses the projector, then adjust the focusing piece 23 in the damping slide groove 22 to the projection structure position of the projector, and then rotate the two second adjusting knobs 12 respectively, by fine-tuning the position of the projector, the radiation structure of the projector is aligned with the focusing piece 23, which plays the effect of cooperating with the protective structure, and there is no need to manually open the device for adjustment, and the accuracy is higher.

[0025] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. For those skilled in the art, it is obvious that the utility model is not limited to the details of the above exemplary embodiments, and the utility model can be implemented in other specific forms without departing from the spirit or basic features of the utility model; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the utility model is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the utility model, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0026] 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 stand for a library, comprising a counterweight chassis (1), characterized in that: The upper side of the counterweight chassis (1) is fixedly connected to a fixed sleeve rod (2), the upper side of the fixed sleeve rod (2) is movably connected to a telescopic rod (3), the upper side of the telescopic rod (3) is fixedly connected to a mounting plate (4), the upper side of the mounting plate (4) is provided with a first mounting groove (5), the front and rear walls of the first mounting groove (5) are rotatably connected to a bidirectional screw rod (6), the upper side surface of the mounting plate (4) is symmetrically provided with a second mounting groove (7), the inner side of the second mounting groove (7) is provided with a second screw rod (6) The left and right walls are rotatably connected with a screw rod (8); the outer side of the bidirectional screw rod (6) is symmetrically and movably screwed with a first clamping plate (9); the outer sides of the screw rods (8) on the left and right sides are movably screwed with a second clamping plate (10); the first clamping plate (9) and the second clamping plate (10) are both located on the upper side of the mounting plate (4); the rear side of the mounting plate (4) is rotatably connected with a first adjusting knob (11); and the left and right sides of the mounting plate (4) are rotatably connected with a second adjusting knob (12).

2. A library projection stand according to claim 1, characterized in that: The front end of the first adjusting knob (11) is fixedly connected to the rear end of the bidirectional screw rod (6), and the opposite ends of the second adjusting knobs (12) on the left and right sides are fixedly connected to the opposite ends of the screw rod (8).

3. The library projection stand according to claim 1, characterized in that: An adjusting bolt (13) is screwed onto the top of the outer side of the fixed sleeve rod (2), and one end of the adjusting bolt (13) located on the inner side of the fixed sleeve rod (2) abuts against the outer side of the telescopic rod (3).

4. The library projection stand according to claim 3, characterized in that: The outer side of the fixed sleeve rod (2) is fixedly sleeved with a fixing piece (14), the fixing piece (14) is located below the adjusting bolt (13), the outer side of the fixing piece (14) is fixedly connected with supporting feet (15) on all sides, and the lower end of the supporting feet (15) is fixedly connected with a rubber foot (16).

5. The library projection stand according to claim 1, characterized in that: Screw rods (17) are inserted through the four corners of the upper side of the mounting plate (4); a fixing cover (18) is fixedly connected to the upper side of the screw rod (17); the fixing cover (18) corresponds to the mounting plate (4); an adjusting nut (19) is movably screwed to the outer side of the screw rod (17); the adjusting nut (19) is located below the mounting plate (4).

6. The library projection stand according to claim 5, characterized in that: The four top corners of the inner side of the fixed cover (18) are fixedly connected with a pressure plate spring (20), the lower end of the pressure plate spring (20) is fixedly connected with a pressure plate (21), the outer side of the pressure plate (21) is slidably connected to the inner wall of the fixed cover (18), the front side of the fixed cover (18) is provided with a damping groove (22), and the inner side of the damping groove (22) is slidably connected with a focusing piece (23).

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