History wall chart expansion bracket

Abstract

The utility model discloses a history wall chart telescopic frame, relates to the history teaching appliance technical field, and specifically comprises a movable frame body, the top of the movable frame body is connected with a lifting frame through an electric telescopic rod 1, the lifting frame is uniformly provided with grooves, the inner cavity of each groove is internally and movably connected with a slide block, and the slide block is provided with a slide groove; a second electric telescopic rod is fixed to the top of the sliding block, a lifting plate is fixedly connected to the top of the second electric telescopic rod, a fixed clamp is fixedly connected to the top end of the outer side of the lifting plate, a movable clamp is arranged at the bottom end of the outer side of the lifting plate, and the fixed clamp and the movable clamp are connected through a ball screw. According to the historical wall chart telescopic frame, the two ends of a historical wall chart can be clamped and fixed, and the probability that the historical wall chart falls off is reduced; a plurality of historical wall maps can be hung and displayed at the same time, the use convenience of the telescopic frame is improved, and teaching can be carried out smoothly.

Description

Technical Field

[0001] The utility model relates to the technical field of history teaching tools, in particular to a telescopic stand for history wall charts. Background Art

[0002] In history teaching, in order to let students understand history more intuitively, teachers usually use wall charts such as chronological maps and historical figures as auxiliary teaching. At present, wall charts are usually hung on wall chart racks so that all teachers can use them together. In the related art, the public historical wall chart hanging rack usually only has the function of hanging a single wall chart. If multiple wall charts need to be displayed, the teacher needs to replace the historical wall charts, such as the solution disclosed in the authorized patent document with application number CN202120304946.2. It is inconvenient to use. In this process, the teacher needs to spend more time to replace the historical wall charts, which will affect the teaching progress. Based on this, the present application proposes a vertical telescopic wall chart rack. Utility Model Content

[0003] The utility model provides a telescopic historical wall chart stand, which solves the problem in the above-mentioned background technology that multiple historical wall charts cannot be hung at the same time, and when displaying different historical wall charts, the wall charts need to be replaced, which is troublesome to use and affects the teaching progress.

[0004] The utility model provides the following technical solution: a telescopic stand for historical wall charts, comprising a movable frame, the top of the movable frame being connected to a lifting frame via a first electric telescopic rod, the lifting frame being evenly provided with grooves, the inner cavity of the groove being movably connected to a slider, the top of the slider being fixed with a second electric telescopic rod, the top of the second electric telescopic rod being fixedly connected to a lifting plate, the top end of the outer side of the lifting plate being fixedly connected to a fixed clamp, the bottom end of the outer side of the lifting plate being provided with a movable clamp, the fixed clamp and the movable clamp being connected via a ball screw;

[0005] The fixed clamp and the movable clamp both include a connecting block, one side of the connecting block is fixedly connected to a fixed clamping plate, the other side of the connecting block is movably connected to a movable clamping plate, the movable clamping plate and the connecting block are connected by a spring, and the side of the movable clamping plate away from the fixed clamping plate is fixedly connected to a handle.

[0006] Preferably, the lifting frame and the groove are both L-shaped, one end of the electric telescopic rod 1 is fixedly connected to the top of the movable frame, and the end of the output shaft of the electric telescopic rod 1 is fixedly connected to the vertical end of the lifting frame.

[0007] Preferably, a limiting groove is provided at the horizontal end of the groove, a limiting block is movably connected to the inner cavity of the limiting groove, and the limiting block is fixedly connected to the slider.

[0008] Preferably, the ball screw is movably connected to the connecting block in the fixed clamp, the top of the ball screw is fixedly connected with a screw cap, the outer ring of the ball screw is threadedly connected with a ball nut, and the ball nut is fixedly connected to the connecting block in the movable clamp.

[0009] Preferably, a slot is provided on the side of the connecting block away from the lifting plate, one end of the movable splint is movably connected to the inner cavity of the slot, one end of the slot away from the fixed splint is fixedly connected to a spring, and the other end of the spring is fixedly connected to the movable splint.

[0010] Preferably, the mobile frame includes a base plate fixedly connected to the electric telescopic rod, rollers are evenly provided on the bottom of the base plate, and a push handle is fixedly connected to the side of the base plate away from the lifting frame.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] 1. The telescopic rack for historical wall charts can change the height of the historical wall charts by setting the electric telescopic rods 1 and 2, so that the historical wall charts can be hung at a suitable height, thereby improving the adaptability of the historical wall charts and reducing the volume of the telescopic rack, making it easier to store the telescopic rack.

[0013] 2. The telescopic stand for history wall charts can clamp and fix both ends of the history wall charts, reducing the probability of the history wall charts falling off; multiple history wall charts can be hung and displayed at the same time, which improves the convenience of using the telescopic stand and allows teaching to proceed smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of the structure of the utility model;

[0015] Figure 2 For the utility model structure Figure 1 Schematic diagram on the back;

[0016] Figure 3 For the utility model structure Figure 2 Schematic cross-section;

[0017] Figure 4 This is an exploded schematic diagram of the structural fixing clamp of the utility model;

[0018] Figure 5 This is an explosion diagram of the lifting frame structure of the utility model.

[0019] In the figure: 1. Mobile frame; 2. Electric telescopic rod 1; 3. Lifting frame; 4. Lifting plate; 5. Fixed clamp; 6. Movable clamp; 7. Ball screw; 8. Fixed splint; 9. Movable splint; 10. Handle; 11. Slider; 12. Electric telescopic rod 2; 13. Spring; 14. Limit block; 15. Limit slot; 16. Groove; 17. Connecting block. DETAILED DESCRIPTION

[0020] 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 embodiments described 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 making creative efforts are within the scope of protection of the present invention.

[0021] The utility model provides a telescopic historical wall chart stand, comprising a movable frame 1, wherein the movable frame 1 comprises a bottom plate, rollers are evenly arranged on the bottom of the bottom plate, and a push handle is fixedly connected to one side of the bottom plate. The arrangement of the movable frame 1 facilitates the movement of the telescopic historical wall chart stand.

[0022] An electric telescopic rod 2 is fixedly connected to the top of the base plate, and the end of the output shaft of the electric telescopic rod 2 is fixedly connected to a lifting frame 3. The lifting frame 3 is L-shaped, and the vertical end of the lifting frame 3 is fixedly connected to the electric telescopic rod 2. The horizontal end of the lifting frame 3 is located on the side of the electric telescopic rod 2 away from the push handle. Through the setting of the electric telescopic rod 2, the extension and retraction of the electric telescopic rod 2 can change the position of the lifting frame 3 fixedly connected to it.

[0023] Grooves 16 are evenly provided on the side of the lifting frame 3 away from the electric telescopic rod 2. The slider 11 is movably connected to the inner cavity of the groove 16. The groove 16 is L-shaped. A limiting groove 15 is provided at the horizontal end of the groove 16. The limiting block 14 is movably connected to the inner cavity of the limiting groove 15. The limiting block 14 is fixedly connected to the slider 11. By setting the limiting groove 15 and the limiting block 14, the slider 11 can be limited to prevent the slider 11 from separating from the groove 16, and there is damping between the limiting block 14 and the limiting groove 15. Under the action of external force, the slider 11 can slide in the horizontal end of the groove 16. When the restriction on the slider 11 is released, the damping between the limiting block 14 and the limiting groove 15 makes the position of the slider 11 in the groove 16 fixed, which is convenient for the use of the telescopic frame.

[0024] The top of the slider 11 is fixedly connected to an electric telescopic rod 2 12 , and the top of the electric telescopic rod 2 12 is fixedly connected to a lifting plate 4 . The extension and retraction of the electric telescopic rod 2 12 can change the height of the lifting plate 4 .

[0025] The top end of the lifting plate 4, away from the vertical end of the lifting frame 3, is fixedly connected to a fixing clamp 5. The fixing clamp 5 includes a connecting block 17 fixedly connected to the lifting plate 4. The side of the connecting block 17 away from the lifting plate 4 is fixedly connected to the fixed clamp 8. The side of the connecting block 17 away from the lifting plate 4 is provided with a slot. A movable clamp 9 is movably connected within the inner cavity of the slot. One end of the slot away from the fixed clamp 8 is fixedly connected to a spring 13. The other end of the spring 13 is fixedly connected to the movable clamp 9. The side of the movable clamp 9 away from the fixed clamp 8 is fixedly connected to a handle 10. Due to the setting of the spring 13, the distance between the movable clamp 9 and the fixed clamp 8 can be changed under the action of an external force, making it convenient for the user to place the historical wall chart to be hung between the movable clamp 9 and the fixed clamp 8. When the setting of the movable clamp 9 is released, the rebound force of the spring 13 can push the movable clamp 9 toward the fixed clamp 8. The fixed clamp 8 and the movable clamp 9 are used in combination to clamp the historical wall chart.

[0026] A ball screw 7 is movably connected to one side of the connecting block 17, and a screw cap is fixedly connected to the top of the ball screw 7. The user can drive the ball screw 7 to rotate by screwing the cap. The outer ring of the ball screw 7 is threadedly connected to a ball nut. The fixed clamp 5 is connected to the movable clamp 6 through the ball screw 7. The movable clamp 6 includes another connecting block 17, and the ball nut is fixedly connected to the other connecting block 17. Through the setting of the ball screw 7, when the ball screw 7 rotates, the distance between the fixed clamp 5 and the movable clamp 6 can change. The fixed clamp 5 and the movable clamp 6 can clamp and fix historical wall charts of various sizes, thereby improving the adaptability of the telescopic frame.

[0027] One side of the other connecting block 17 is fixedly connected to another fixed splint 8, and the other side of the other connecting block 17 is movably connected to another movable splint 9. The other movable splint 9 is connected to the other connecting block 17 through another spring 13, and the side of the other movable splint 9 away from the other fixed splint 8 is fixedly connected to another handle 10.

[0028] From the above description, it can be seen that when the historical wall chart telescopic stand is in use, the two ends of the historical wall chart can be clamped and fixed, reducing the probability of the historical wall chart falling off; the height of the historical wall chart to be displayed can be adjusted according to needs, improving the adaptability of the telescopic stand; multiple historical wall charts can be hung and displayed at the same time, improving the convenience of using the telescopic stand; the height of the telescopic stand can be adjusted according to needs, facilitating the use and storage of the telescopic stand.

[0029] The electrical components involved in this application are all existing technologies. Those skilled in the art are familiar with their connection methods. Through these people, all the electrical components in this application are connected to their corresponding power supplies through wires, and according to actual conditions, appropriate controllers are selected to meet control requirements. The specific connections and control sequences are described below. The electrical connections between the electrical components are completed in a sequential working order. The detailed connection methods are well known in the art. The following mainly introduces the working principles and processes, and no further explanation of electrical control is given.

[0030] To sum up: when the telescopic stand for historical wall chart is used, the user rotates the ball screw 7. When the ball screw 7 rotates, the ball nut threadedly connected to it drives the other connecting block 17 to move, so that the distance between the movable clamp 6 and the fixed clamp 5 changes, so that the distance between the fixed clamp 5 and the movable clamp 6 can be adjusted according to needs until the fixed clamp 5 and the movable clamp 6 can clamp the historical wall chart at the same time. The method of using the fixed clamp 5 and the movable clamp 6 is: the user pulls the movable splint 9 through the handle 10, so that the movable splint 9 is away from the fixed splint 8 until the distance between the fixed splint 8 and the movable splint 9 can accommodate the historical wall chart. After the user places the historical wall chart between the fixed splint 8 and the movable splint 9, the restriction on the movable splint 9 is released. Under the action of the rebound force of the spring 13, the movable splint 9 can be close to the fixed splint 8. The coordinated use of the fixed splint 8 and the movable splint 9 can achieve the clamping of the historical wall chart.

[0031] The user moves the telescopic frame to a suitable position by moving the frame body 1. When the historical wall chart needs to be displayed, the user adjusts the height of the lifting frame 3 by the electric telescopic rod 1 2, and the user adjusts the height of the lifting plate 4 by the electric telescopic rod 2 12 until the height of the historical wall chart is appropriate. When multiple historical wall charts need to be displayed at the same time, the user can adjust the height of the historical wall chart by the electric telescopic rod 2 12 so that the historical wall chart is in a staggered state in the vertical plane. The user can also move the slider 11 in the horizontal end of the groove 16 so that the historical wall chart is in a staggered state in the horizontal plane.

[0032] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology and will not be described in detail here. The content not described in detail in this specification belongs to the existing technology known to professional and technical personnel in this field. Although the embodiments of the present invention have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and modifications can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A telescopic historical wall chart stand, comprising a movable frame (1), characterized in that: The top of the movable frame (1) is connected to a lifting frame (3) via an electric telescopic rod (2), the lifting frame (3) is evenly provided with grooves (16), the inner cavity of the groove (16) is movably connected to a slider (11), the top of the slider (11) is fixed with an electric telescopic rod (12), the top of the electric telescopic rod (12) is fixedly connected to a lifting plate (4), the top end of the outer side of the lifting plate (4) is fixedly connected to a fixed clamp (5), the bottom end of the outer side of the lifting plate (4) is provided with a movable clamp (6), and the fixed clamp (5) and the movable clamp (6) are connected via a ball screw (7); The fixed clamp (5) and the movable clamp (6) both include a connecting block (17), one side of the connecting block (17) is fixedly connected to a fixed clamp (8), and the other side of the connecting block (17) is movably connected to a movable clamp (9), the movable clamp (9) and the connecting block (17) are connected via a spring (13), and the side of the movable clamp (9) away from the fixed clamp (8) is fixedly connected to a handle (10).

2. The telescopic stand for historical wall charts according to claim 1, characterized in that: The lifting frame (3) and the groove (16) are both L-shaped, one end of the electric telescopic rod (2) is fixedly connected to the top of the movable frame (1), the end of the output shaft of the electric telescopic rod (2) is fixedly connected to the vertical end of the lifting frame (3), and the groove (16) is evenly provided on the side of the lifting frame (3) away from the electric telescopic rod (2).

3. The telescopic stand for historical wall charts according to claim 2, characterized in that: A limiting groove (15) is provided at the horizontal end of the groove (16), and a limiting block (14) is movably connected in the inner cavity of the limiting groove (15), and the limiting block (14) is fixedly connected to the slider (11).

4. The telescopic stand for historical wall charts according to claim 1, characterized in that: The ball screw (7) is movably connected to the connecting block (17) in the fixed clamp (5); a screw cap is fixedly connected to the top of the ball screw (7); a ball nut is threadedly connected to the outer ring of the ball screw (7); and the ball nut is fixedly connected to the connecting block (17) in the movable clamp (6).

5. The telescopic stand for historical wall charts according to claim 1, characterized in that: A slot is provided on the side of the connecting block (17) away from the lifting plate (4), one end of the movable splint (9) is movably connected to the inner cavity of the slot, and a spring (13) is fixedly connected to the end of the slot away from the fixed splint (8), and the other end of the spring (13) is fixedly connected to the movable splint (9).

6. The telescopic stand for historical wall charts according to claim 2, characterized in that: The movable frame (1) comprises a bottom plate fixedly connected to an electric telescopic rod (2), rollers are evenly arranged on the bottom of the bottom plate, and a push handle is fixedly connected to the side of the bottom plate away from the lifting frame (3).

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