CN220647353U - An anti-cheating device for online exams - Google Patents

Abstract

The utility model discloses an online examination anti-cheating device which comprises an assembly box, wherein a turntable is rotationally connected to the upper side of the assembly box, a camera is hinged to the upper surface of the turntable, an extension frame is hinged to the lower surface of the assembly box, screw nuts are arranged in the extension frame, sliding columns are symmetrically arranged on the front side and the rear side of the screw nuts, movable grooves are symmetrically arranged on the front side and the rear side of the extension frame, the two movable grooves are respectively sleeved on the outer sides of the two sliding columns, and a trapezoidal screw rod is rotationally connected to the lower surface of the assembly box through a second bearing.

Description

An anti-cheating device for online exams

Technical field

The utility model belongs to the technical field of anti-cheating, and in particular relates to an anti-cheating device for online examinations.

Background technique

Online exams usually refer to an exam format in which the entire exam process is conducted on the Internet by operating a computer. It is separated from paper media and can also be said to be an exam conducted through online media. It is a paperless exam system that enables online exams. The exam requires the establishment of an online exam system. The online exam learning system is an application software that replaces traditional exams and fully realizes computer automation.

The online exam learning system can completely realize paperless, networked, and automated computer online learning exams. It has far-reaching practical significance and practical value for the unit’s information construction. In order to meet the needs of online exams, we propose a Anti-cheating device for online exams.

Utility model content

The purpose of this utility model is to provide an anti-cheating device for online examinations to solve the problems raised in the above background technology.

In order to achieve the above purpose, the present invention provides the following technical solution: an online examination anti-cheating device, including an assembly box, a turntable is rotatably connected to the top of the assembly box, a camera is hinged to the upper surface of the turntable, and the assembly box An extension frame is hingedly connected to the lower surface of the extension frame. A screw nut is provided inside the extension frame. A sliding column is symmetrically provided on the front and rear of the screw nut. A movable groove is symmetrically provided on the front and rear of the extension frame, and Two movable grooves are respectively sleeved on the outside of the two sliding columns. The lower surface of the assembly box is rotationally connected to a trapezoidal screw through a second bearing, and the trapezoidal screw is threadedly connected to the screw nut. The trapezoidal screw is A first knob is provided at the lower end, a support plate is hinged at the left end of the extension frame, and a clamping component is provided on one side of the assembly box.

Preferably, the clamping assembly includes a clamping rod symmetrically hinged to the left side wall of the assembly box. The left ends of the two clamping rods are provided with clamping plates. The left side wall of the assembly box is provided with a guide groove. A threaded rod is provided inside the guide groove, and an end plate is provided at the left end of the threaded rod. A linkage rod is symmetrically hinged on the front and back of the end plate, and the outer ends of the two linkage rods are respectively hinged with the two clamping rods. .

Preferably, the clamping assembly further includes an internally threaded tube rotatably connected to the assembly box through a first bearing, and the internally threaded tube is threadedly connected to the threaded rod, and a second knob is provided at the right end of the internally threaded tube.

Preferably, the extension frame and the movable groove are arranged at a low left and high right angles, and the resisting plate is located directly below the two clamping plates.

Preferably, the opposite sides of the two plywood plates are provided with rubber pads, and the opposite sides of the two rubber pads are provided with anti-slip grooves.

Preferably, the upper surface of the assembly box is provided with a collar, the circumferential inner wall of the collar is provided with a snap ring, the circumferential outer wall of the turntable is provided with a circular groove, and the circular groove is sleeved on the outside of the snap ring.

Compared with the existing technology, the beneficial effects of this utility model are:

(1) This online exam anti-cheating device can clamp and fix the assembly box on the side of monitors with different thicknesses by setting the clamping component. By setting the extension frame and the resisting plate, the clamp between the extension frame and the assembly box can be adjusted. corner until the support plate butts against the right side wall of the monitor, which supports the assembly box and allows the camera to be quickly installed on the side wall of the monitor to improve the stability of the camera.

(2) The online examination anti-cheating device is provided with a turntable, which can adjust the direction of the camera and the elevation angle of the camera by rotating the turntable, so that the camera faces the examinee directly, thereby monitoring the examinee's examination status and preventing the examinee from cheating.

Description of drawings

Figure 1 is a schematic diagram of the three-dimensional structure of the utility model;

Figure 2 is a front-section perspective view of the utility model;

Figure 3 is a cross-sectional perspective view of the utility model;

Figure 4 is an enlarged structural view of position A in Figure 2 of the present invention.

In the picture: 1. Assembly box; 2. Turntable; 3. Camera; 4. Extension frame; 5. Screw nut; 6. Slide column; 7. Movable slot; 8. Trapezoidal screw; 9. First knob; 10 , Resisting plate; 11. Clamping rod; 12. Clamping plate; 13. Guide groove; 14. Threaded rod; 15. End plate; 16. Linkage rod; 17. First bearing; 18. Internally threaded pipe; 19. Second Knob; 20. Second bearing; 21. Rubber pad; 22. Collar.

Detailed ways

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, not all implementations. example. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present utility model.

Please refer to Figures 1 to 4. The present utility model provides an anti-cheating device for online examinations, which includes an assembly box 1. A turntable 2 is rotatably connected to the top of the assembly box 1. A camera 3 is hinged to the upper surface of the turntable 2. An extension frame 4 is hinged on the lower surface. A screw nut 5 is provided inside the extension frame 4. A sliding column 6 is symmetrically provided on the front and rear of the screw nut 5. A movable groove 7 is symmetrically provided on the front and rear of the extension frame 4. Two movable grooves 7 are respectively sleeved on the outside of the two sliding columns 6. The extension frame 4 and the movable grooves 7 are both arranged at a low left and high right angles. The lower surface of the assembly box 1 is rotatably connected to a trapezoidal screw rod through a second bearing 20. 8, and the trapezoidal screw rod 8 is threadedly connected to the screw nut 5. The lower end of the trapezoidal screw rod 8 is provided with a first knob 9. The left end of the extension frame 4 is hinged with a resisting plate 10. The resisting plate 10 is located directly below the two splints 12. , one side of the assembly box 1 is provided with a clamping component.

In this embodiment, preferably, the clamping assembly includes a clamping rod 11 that is symmetrically hinged to the left side wall of the assembly box 1. The left ends of the two clamping rods 11 are both provided with splints 12, and the left side wall of the assembly box 1 is provided with a clamping plate 12. There is a guide groove 13. A threaded rod 14 is provided inside the guide groove 13. An end plate 15 is provided at the left end of the threaded rod 14. A linkage rod 16 is symmetrically hinged on the front and back of the end plate 15, and the outer ends of the two linkage rods 16 Hinged with two clamping rods 11 respectively, the clamping assembly also includes an internally threaded tube 18 that is rotationally connected to the assembly box 1 through a first bearing 17, and the internally threaded tube 18 is threadedly connected to the threaded rod 14, and the right end of the internally threaded tube 18 A second knob 19 is provided. When holding the second knob 19 and twisting the internally threaded pipe 18, the threaded rod 14 and the end plate 15 are moved closer to the internally threaded pipe 18 through the threaded connection between the internally threaded pipe 18 and the threaded rod 14. When moving, the end plate 15 drives the two clamping rods 11 to move inward through the two linkage rods 16 respectively. The clamping rods 11 drive the clamping plates 12 to move synchronously to clamp the two clamping plates 12 on the outside of the display.

In this embodiment, preferably, rubber pads 21 are provided on the opposite sides of the two clamping plates 12, and anti-slip grooves are provided on the opposite sides of the two rubber pads 21. When the two clamping rods 11 are combined, the camera 3 is clamped. When fixed on the side wall of the display screen, the rubber pad 21 elastically deforms to act as a buffer to prevent excessive clamping force of the clamping rod 11 from damaging the display. At the same time, the rubber pad 21 and the anti-slip groove opened on the rubber pad 21 can The friction force between the clamping rod 11 and the display is increased to improve the clamping stability.

In this embodiment, preferably, the upper surface of the assembly box 1 is provided with a collar 22, the circumferential inner wall of the collar 22 is provided with a snap ring, the circumferential outer wall of the turntable 2 is provided with a circular groove, and the circular groove is set on the snap ring. On the outside, the collar 22 can limit the horizontal and vertical movement of the turntable 2 so that the turntable 2 can only rotate.

The working principle and usage process of the utility model: when using the device, set the two splints 12 on the side walls of the display, hold the second knob 19 and twist the internal threaded tube 18, and pass the internal threaded tube 18 and the threaded rod 14 The threaded connection causes the threaded rod 14 and the end plate 15 to move closer to the internally threaded pipe 18. The end plate 15 drives the two clamping rods 11 to move inward through the two linkage rods 16, and the clamping rod 11 drives the clamping plate 12 Move synchronously, clamp the two splints 12 on the outside of the display, hold the first knob 9 and twist the trapezoidal screw 8, through the threaded connection between the trapezoidal screw 8 and the screw nut 6, so that the screw nut 6 moves vertically , the two sliding columns 6 on the screw nut 6 slide along the inner walls of the two movable grooves 7 respectively, adjust the angle between the extension frame 4 and the assembly box 1 until the resisting plate 10 abuts the right side wall of the display, facing the camera 3 Playing a supporting role, turn the turntable 2 to adjust the orientation of the camera 3 and adjust the pitch angle of the camera 3 so that the camera 3 is facing the examiner. The camera 3 is electrically connected to the monitoring display, so that the invigilator can monitor the test status of the examinee and prevent Its cheating.

Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art will understand that various changes and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. , substitutions and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. An online examination anti-cheating device, including an assembly box (1), characterized in that: a turntable (2) is rotatably connected to the top of the assembly box (1), and a camera is hinged to the upper surface of the turntable (2) (3). An extension frame (4) is hinged to the lower surface of the assembly box (1). A screw nut (5) is provided inside the extension frame (4). The front side of the screw nut (5) A sliding column (6) is provided symmetrically with the front and rear surfaces of the extension frame (4), and an movable groove (7) is provided symmetrically with the front and rear surfaces of the extension frame (4), and the two movable grooves (7) are respectively sleeved on the two sliding columns (6). On the outside, a trapezoidal screw (8) is rotatably connected to the lower surface of the assembly box (1) through a second bearing (20), and the trapezoidal screw (8) is threadedly connected to the screw nut (5). The trapezoidal screw (8) is threadedly connected to the screw nut (5). The lower end of the screw rod (8) is provided with a first knob (9), the left end of the extension frame (4) is hinged with a resisting plate (10), and one side of the assembly box (1) is provided with a clamping component. 2. An online exam anti-cheating device according to claim 1, characterized in that: the clamping assembly includes a clamping rod (11) symmetrically hinged on the left side wall of the assembly box (1) in a front-to-back manner, and the left ends of the two clamping rods (11) are each provided with a clamping plate (12), and the left side wall of the assembly box (1) is provided with a guide groove (13), and the interior of the guide groove (13) is provided with a threaded rod (14), and the left end of the threaded rod (14) is provided with an end plate (15), and the front and rear sides of the end plate (15) are symmetrically hinged with linkage rods (16), and the outer ends of the two linkage rods (16) are respectively hinged to the two clamping rods (11). 3. An online examination anti-cheating device according to claim 2, characterized in that: the clamping assembly further includes an internally threaded pipe (18) rotatably connected to the assembly box (1) through a first bearing (17), and The internally threaded pipe (18) is threadedly connected to the threaded rod (14), and a second knob (19) is provided at the right end of the internally threaded pipe (18). 4. An online examination anti-cheating device according to claim 2, characterized in that: the extension frame (4) and the movable groove (7) are both arranged at a low left and high right angles, and the supporting plate (10) Located directly below the two clamping plates (12). 5. An online examination anti-cheating device according to claim 2, characterized in that: rubber pads (21) are provided on opposite sides of the two splints (12), and the two rubber pads (21) face each other. There are anti-slip grooves on one side. 6. An online examination anti-cheating device according to claim 1, characterized in that: the upper surface of the assembly box (1) is provided with a collar (22), and the circumferential inner wall of the collar (22) is provided with There is a snap ring, and a circular groove is provided on the circumferential outer wall of the turntable (2), and the circular groove is set on the outside of the snap ring.