Foldable projection whiteboard

Abstract

The utility model relates to the field of projection whiteboards, in particular to a foldable projection whiteboard which comprises two frame plates, a flexible whiteboard, a first U-shaped supporting leg and a second U-shaped supporting leg, a rolling rod is installed between the tops of the two frame plates in a penetrating mode, the flexible whiteboard is arranged outside the rolling rod in a rolling mode, a sleeve is arranged between the bottoms of the two frame plates, and the first U-shaped supporting leg and the second U-shaped supporting leg are connected through the sleeve. The bottom of the flexible white board is connected with a clamping groove in the inner wall of a sleeve in a clamped mode through a clamping strip to be fixed, so that the flexible white board is in a tightened state, images, videos and the like are conveniently projected, sliding grooves are formed in the inner sides of two frame plates, sliding blocks are fixedly installed at the tops of the two ends of a first U-shaped supporting leg, and the frame plates are slidably connected with the two sides of the first U-shaped supporting leg; the height of the bottom of the flexible white board can be adjusted along with rolling or laying down of the flexible white board, it is guaranteed that the flexible white board is in a tensioned state all the time, and the projection effect is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to the field of projection whiteboards, in particular to a foldable projection whiteboard. Background Art

[0002] A whiteboard is similar to a screen and is used in conjunction with a projector. It is a tool used to display images and video files. Whiteboards are also set up in some classrooms to assist teaching.

[0003] However, the prior art has the following defects:

[0004] A projection whiteboard is composed of supporting legs and a whiteboard. In order to display more information and allow more people to clearly see the displayed content, the whiteboard is made larger. However, existing whiteboards cannot be folded or rolled up, which makes storage inconvenient and occupies extra space. Utility Model Content

[0005] The purpose of the utility model is to provide a foldable projection whiteboard to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a foldable projection whiteboard, comprising two frame plates, a flexible whiteboard, a first "U"-shaped supporting leg and a second "U"-shaped supporting leg, a winding rod is inserted between the tops of the two frame plates, a round through hole is opened on the top of the frame plate, the winding rod is rotatably connected to the round through hole, a triangular sleeve is threadedly installed on the top of the back of the frame plate, a protective sleeve is rotatably installed between the fronts of the two triangular sleeves, both sides of the protective sleeve are fixedly installed with a clamping sleeve, the clamping sleeve is clamped and connected to the two ends of the winding rod, the outer wall of the middle bottom of the winding rod is fixedly connected to the top of the flexible whiteboard, the flexible whiteboard is wrapped around the outside of the winding rod, and a sleeve is provided at the bottom of the two frame plates.

[0007] By adopting the above technical solution, the winding rod can roll up and fold the flexible whiteboard. After rolling up, the protective sleeve is clamped on the outside of the winding rod, which can prevent the flexible whiteboard from spreading out due to gravity and weight, and play a fixing role.

[0008] The cross-sectional shape of the sleeve is rectangular, the bottoms of the two frame plates are snap-fitted and installed inside the two ends of the sleeve, the outer wall of the bottom of the frame plate is fixedly connected to the inner walls at the two ends of the sleeve, and an arc-shaped storage plate is fixedly installed on the outer wall in the middle of the front side of the sleeve.

[0009] The above technical solution is adopted, in which the two ends of the sleeve are sleeved on the outer sides of the bottoms of the two frame plates, and the arc-shaped storage plate is convenient for placing tools such as remote controls and laser pens for easy use.

[0010] A card slot is provided on the inner wall of the front side of the sleeve, and the bottom of the flexible whiteboard is mounted in the card slot in the sleeve through a card strip.

[0011] With the above technical solution, the flexible whiteboard is connected to the inner wall of the sleeve by a clamping strip and is detachable. However, if the flexible whiteboard is damaged, it can be repaired and replaced individually to avoid waste of resources.

[0012] The cross-sectional shape of the frame plate is "L"-shaped, a sliding groove is provided on the inner wall of the frame plate, sliders are fixedly installed on the tops of both ends of the first "U"-shaped supporting leg, the sliders are slidably connected to the sliding groove, the width of the first "U"-shaped supporting leg is smaller than the distance between the two frame plates, and the first "U"-shaped supporting leg is clamped and installed between the two frame plates.

[0013] By adopting the above technical solution, the frame plate is slidably connected to the first "U"-shaped supporting leg, so that the height of the flexible whiteboard can be adjusted, and the size of the flexible whiteboard can be adjusted according to actual conditions, thereby broadening its scope of application.

[0014] A connecting rod is fixedly installed between the tops of the first "U"-shaped supporting legs, and rotating connecting pieces are fixedly installed at both ends of the back of the connecting rod. The two ends of the top of the second "U"-shaped supporting legs are rotatably connected to the two ends of the back of the connecting rod through rotating connecting pieces.

[0015] By adopting the above technical solution, the top of the first "U"-shaped supporting leg is rotatably connected to the top of the second "U"-shaped supporting leg, and the inclination angle of the projection whiteboard can be adjusted according to actual conditions.

[0016] A number of limiting holes are provided on the back of the bottom of the two frame plates and on the back of the top of both ends of the first "U"-shaped supporting leg. An adjusting piece is provided on the outside of the overlapping position of the top of both ends of the first "U"-shaped supporting leg and the bottom of the two frame plates, and a button is provided on the back of the adjusting piece.

[0017] By adopting the above technical solution, pressing the button can contact the locking state of the adjustment member, so that the frame plate can slide on the first "U"-shaped supporting leg to adjust the bottom height of the whiteboard, and the adjustment member plays the role of limiting the position and locking.

[0018] The first "U"-shaped supporting leg has a first anti-slip corner sleeve at the corners at both ends of the bottom, and the second "U"-shaped supporting leg has a second anti-slip corner sleeve at the corners at both ends of the bottom. The bottom of the first anti-slip corner sleeve and the bottom of the second anti-slip corner sleeve are both provided with a plurality of anti-slip grooves.

[0019] With the above technical solution, the first anti-skid corner sleeve and the second anti-skid corner sleeve play an anti-skid role to prevent the whiteboard from slipping and moving, and the anti-skid groove increases the friction force to further ensure the anti-skid performance.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The projection whiteboard of the utility model adopts a flexible whiteboard. The top of the flexible whiteboard is wound around the outside of the rolling rod and can be rolled up and folded. The bottom of the flexible whiteboard is slidably connected to the first "U"-shaped supporting leg through a sleeve and a frame plate, which not only fixes the bottom of the flexible whiteboard, but also moves with the rolling of the whiteboard to prevent the whiteboard from being torn. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 It is a front structural schematic diagram of the utility model;

[0024] Figure 3 This is a schematic diagram of the overall top view structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the connection structure between the support leg and the frame plate in the utility model;

[0026] Figure 5 It is a structural schematic diagram of the winding part in the utility model.

[0027] In the figure: 1. frame plate; 2. winding rod; 3. protective sleeve; 4. clamping sleeve; 5. flexible whiteboard; 6. arc-shaped storage plate; 7. first "U"-shaped supporting leg; 8. first anti-slip corner sleeve; 9. second anti-slip corner sleeve; 10. second "U"-shaped supporting leg; 11. sleeve; 12. adjusting part; 13. slide groove; 14. connecting rod; 15. button; 16. rotating connecting part; 17. slider; 18. triangular sleeve; 19. round through hole; 20. clamping strip. DETAILED DESCRIPTION

[0028] 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.

[0029] See also Figure 1-5The utility model provides a foldable projection whiteboard, comprising two frame plates 1, a flexible whiteboard 5, a first "U"-shaped supporting leg 7 and a second "U"-shaped supporting leg 10, a winding rod 2 is inserted between the tops of the two frame plates 1, a round through hole 19 is opened on the top of the frame plate 1, the winding rod 2 is rotatably connected with the round through hole 19, a triangular sleeve 18 is threadedly installed on the top of the back of the frame plate 1, a protective sleeve 3 is rotatably installed between the fronts of the two triangular sleeves 18, a clamping sleeve 4 is fixedly installed on both sides of the protective sleeve 3, the clamping sleeve 4 is clamped and connected with the two ends of the winding rod 2, the outer wall of the middle bottom of the winding rod 2 is fixedly connected with the top of the flexible whiteboard 5, the flexible whiteboard 5 is wound around the outside of the winding rod 2, a sleeve 11 is provided at the bottom of the two frame plates 1, and the protective sleeve 3 is sleeved on the outside of the winding rod 2 and the rolled-up flexible whiteboard 5.

[0030] The cross-sectional shape of the sleeve 11 is rectangular, the bottoms of the two frame plates 1 are snap-fitted inside the two ends of the sleeve 11, the outer wall of the bottom of the frame plate 1 is fixedly connected to the inner walls at the two ends of the sleeve 11, and an arc-shaped storage plate 6 is fixedly installed on the outer wall in the middle of the front side of the sleeve 11, and the two ends of the sleeve 11 are sleeved on the outer side of the bottoms of the two frame plates 1.

[0031] A card slot is provided on the inner wall of the front side of the sleeve 11, and the bottom of the flexible whiteboard 5 is mounted in the card slot in the sleeve 11 through a card strip 20, and is detachable for easy repair and replacement.

[0032] The cross-sectional shape of the frame plate 1 is "L"-shaped, and a slide groove 13 is opened on the inner wall of the frame plate 1. Slide blocks 17 are fixedly installed on the top of both ends of the first "U"-shaped support leg 7, and the slide block 17 is slidably connected to the slide groove 13. The width of the first "U"-shaped support leg 7 is smaller than the distance between the two frame plates 1. The first "U"-shaped support leg 7 is snap-fitted and installed between the two frame plates 1, and the inner side of the frame plate 1 is slidably connected to the outer side of both sides of the first "U"-shaped support leg 7.

[0033] A connecting rod 14 is fixedly installed between the tops of the first "U"-shaped supporting legs 7, and rotating connecting pieces 16 are fixedly installed at both ends of the back side of the connecting rod 14. The two ends of the top of the second "U"-shaped supporting legs 10 are rotatably connected to the two ends of the back side of the connecting rod 14 through the rotating connecting pieces 16. The top of the first "U"-shaped supporting leg 7 is rotatably connected to the top of the second "U"-shaped supporting leg 10 for easy adjustment.

[0034] A plurality of limit holes are provided on the back side of the bottom of the two frame plates 1 and on the back side of the top of both ends of the first "U"-shaped supporting leg 7. An adjusting member 12 is provided on the outside of the overlapping position of the top of both ends of the first "U"-shaped supporting leg 7 and the bottom of the two frame plates 1. A button 15 is provided on the back side of the adjusting member 12, and the adjusting member 12 plays a role of limit locking.

[0035] The first "U"-shaped supporting leg 7 is provided with a first anti-slip corner sleeve 8 at the corners at both ends of the bottom, and the second "U"-shaped supporting leg 10 is provided with a second anti-slip corner sleeve 9 at the corners at both ends of the bottom. The bottom of the first anti-slip corner sleeve 8 and the bottom of the second anti-slip corner sleeve 9 are provided with a plurality of anti-slip grooves. The first anti-slip corner sleeve 8 and the second anti-slip corner sleeve 9 can prevent the projection whiteboard from slipping and moving as a whole.

[0036] Working principle: When the utility model is used, the bottom of the flexible whiteboard 5 is first clamped between the card strip 20 and the card slot inside the sleeve 11, and then the bottom of the flexible whiteboard 5 is clamped and installed into the card slot through the card strip 20 for fixing, and the top of the flexible whiteboard 5 is wrapped around the outside of the winding rod 2. When folding and adjustment is required, the button 15 is pressed to release the lock, so that the frame plate 1 slides downward on the outside of the first "U"-shaped support leg 7. When it slides to a suitable position, the button 15 is released to lock the frame plate 1 and stop sliding down. Then the card sleeve 4 is opened, and the winding rod 2 is rotated to reel in the flexible whiteboard 5 until the flexible whiteboard is in a taut state and stops reeling. The card sleeve 4 is clamped at both ends of the winding rod 2 to play a fixing role to prevent the rolled-up flexible whiteboard 5 from spreading. The utility model can fold the projection whiteboard, which is convenient for storage and easy to adjust the size of the whiteboard.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A foldable projection whiteboard, comprising two frame boards (1), a flexible whiteboard (5), a first "U"-shaped supporting leg (7) and a second "U"-shaped supporting leg (10), characterized in that: A winding rod (2) is inserted and installed between the tops of the two frame plates (1), a round through hole (19) is opened on the top of the frame plate (1), and the winding rod (2) is rotatably connected to the round through hole (19). A triangular sleeve (18) is threadedly installed on the top of the back of the frame plate (1), and a protective sleeve (3) is rotatably installed between the fronts of the two triangular sleeves (18). A clamping sleeve (4) is fixedly installed on both sides of the protective sleeve (3), and the clamping sleeve (4) is snap-fitted and connected to the two ends of the winding rod (2). The outer wall of the middle bottom of the winding rod (2) is fixedly connected to the top of the flexible whiteboard (5), and the flexible whiteboard (5) is wound around the outside of the winding rod (2). Sleeves (11) are provided at the bottom of the two frame plates (1).

2. A foldable projection whiteboard according to claim 1, characterized in that: The cross-sectional shape of the sleeve (11) is rectangular, the bottoms of the two frame plates (1) are snap-fitted and installed inside the two ends of the sleeve (11), the outer wall of the bottom of the frame plate (1) is fixedly connected to the inner walls at the two ends of the sleeve (11), and an arc-shaped storage plate (6) is fixedly installed on the outer wall in the middle of the front face of the sleeve (11).

3. The foldable projection whiteboard according to claim 1, characterized in that: A slot is provided on the inner wall of the front side of the sleeve (11), and the bottom of the flexible whiteboard (5) is mounted in the slot in the sleeve (11) by means of a clip strip (20).

4. The foldable projection whiteboard according to claim 1, characterized in that: The cross-sectional shape of the frame plate (1) is "L"-shaped, a slide groove (13) is provided on the inner wall of the frame plate (1), sliders (17) are fixedly installed at the tops of both ends of the first "U"-shaped support leg (7), the sliders (17) are slidably connected to the slide groove (13), the width of the first "U"-shaped support leg (7) is smaller than the distance between the two frame plates (1), and the first "U"-shaped support leg (7) is snap-fitted and installed between the two frame plates (1).

5. The foldable projection whiteboard according to claim 1, characterized in that: A connecting rod (14) is fixedly mounted between the tops of the first U-shaped supporting legs (7), and rotating connecting members (16) are fixedly mounted on both ends of the back of the connecting rod (14), and the two ends of the top of the second U-shaped supporting legs (10) are rotatably connected to the two ends of the back of the connecting rod (14) via the rotating connecting members (16).

6. The foldable projection whiteboard according to claim 1, characterized in that: A plurality of limiting holes are provided on the back of the bottom of the two frame plates (1) and on the back of the top of both ends of the first "U"-shaped support leg (7), and an adjusting member (12) is sleeved on the outside of the overlapping position of the top of both ends of the first "U"-shaped support leg (7) and the bottom of the two frame plates (1), and a button (15) is provided on the back of the adjusting member (12).

7. The foldable projection whiteboard according to claim 1, characterized in that: The first "U"-shaped supporting leg (7) is sleeved with a first anti-slip corner sleeve (8) at the corners at both ends of the bottom, and the second "U"-shaped supporting leg (10) is sleeved with a second anti-slip corner sleeve (9) at the corners at both ends of the bottom, and the bottom of the first anti-slip corner sleeve (8) and the bottom of the second anti-slip corner sleeve (9) are both provided with a plurality of anti-slip grooves.

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