Telescopic eraser

Abstract

The utility model belongs to the technical field of teaching tools, and provides a telescopic eraser which comprises a containing box, a telescopic structure is arranged in the containing box in a sliding mode, self-locking structures are arranged at the two ends of the telescopic structure, an installation structure is connected to the front face of the telescopic structure in an inserted mode, and an eraser is arranged on the front face of the installation structure. The telescopic structure comprises sliding grooves formed in the two ends of the containing box, and a sliding rod is slidably arranged between the two sliding grooves. The self-locking structure comprises rotating grooves formed in the two ends of the sliding rod, T-shaped blocks are rotationally arranged at the ends, away from each other, of the two rotating grooves, clamping blocks are arranged at the front ends of the sides, close to the containing box, of the two T-shaped blocks, and limiting sliding grooves are symmetrically formed in the ends, away from each other, of the two sliding grooves. The problems that according to existing equipment, rotating motion of a rotating component is converted into sliding motion of a connecting component, two elastic pieces at the connecting position are subjected to acting force in two directions, friction loss of the elastic pieces is increased, and the service life of the equipment is shortened are solved.

Description

Technical Field

[0001] This utility model relates to the field of teaching tools, and in particular to a retractable eraser. Background Technology

[0002] In daily life, erasers are often easily forgotten in some corner and are inconvenient to handle. Sometimes, due to frequent use, erasers are left exposed for extended periods, making them prone to getting dirty. Such erasers can easily make the paper dirtier when erasing. Moreover, as the size of the eraser decreases with use, it becomes difficult to handle, affecting its usability. Therefore, many retractable erasers have appeared on the market.

[0003] A patent with publication number CN220662126U discloses a retractable eraser. The retractable eraser includes a housing, an eraser, and a rotating component. One end of the housing has a mounting opening. A first sidewall of the housing has multiple parallel first strip-shaped holes, and a second sidewall of the housing has multiple parallel second strip-shaped holes. The first and second strip-shaped holes are inclined relative to the centerline of the housing, and their inclination directions are opposite. The first and second sidewalls are arranged opposite to each other. The rotating component has helical ribs located within the first and second strip-shaped holes. The eraser is inserted into the mounting opening and slidably disposed within the housing, with the eraser abutting against the rotating component.

[0004] Existing equipment converts the rotational motion of rotating parts into the sliding motion of connecting parts, causing the two elastic elements at the connection to be subjected to forces in two directions, increasing the frictional wear of the elastic elements and reducing the service life of the equipment.

[0005] Therefore, it is necessary to provide a retractable eraser to solve the above-mentioned technical problems. Utility Model Content

[0006] To solve the above-mentioned technical problems, this utility model provides a retractable eraser.

[0007] The telescopic eraser provided by this utility model includes a storage box, the inside of which is slidably provided with a telescopic structure, the two ends of which are provided with self-locking structures, the front of which is inserted with an installation structure, and the front of the installation structure is provided with an eraser.

[0008] The telescopic structure includes grooves at both ends of the placement box, and a sliding rod is slidably disposed between the two grooves.

[0009] To achieve the effect of locking the position of the telescopic structure, the telescopic eraser provided by this utility model preferably includes a rotating groove at both ends of the sliding rod, a T-shaped block is rotatably provided at the ends of the two rotating grooves that are far apart from each other, a locking block is provided at the front end of the side of the two T-shaped blocks that are close to the placement box, a limiting groove is symmetrically provided at the ends of the two sliding grooves that are far apart from each other, and several locking grooves are provided at equal intervals at both ends of the two limiting grooves.

[0010] In order to achieve the effect of the elastically driven self-locking structure, the telescopic eraser provided by this utility model preferably has a spring on the rear end of each of the two T-shaped blocks near the placement box, and the ends of the two springs that are close to each other are fixedly connected to the sliding rod.

[0011] In order to achieve the effect of manually releasing the self-locking mechanism, the present invention provides a telescopic eraser, preferably with a pressing block at the rear end of each of the two T-shaped blocks on the side away from the placement box.

[0012] To achieve a flexible connection and installation structure, this utility model provides a telescopic eraser. Preferably, the installation structure includes quick-release holes symmetrically opened on the front of the sliding rod, quick-release rods are respectively inserted into the front of the two quick-release holes, and the same mounting box is provided on the front of the two quick-release rods.

[0013] To achieve the effect of inserting and fixing the eraser, the present invention provides a telescopic eraser. Preferably, the mounting box is a box with an open front, and a plurality of fixing rods are evenly arranged on the front of the mounting box, with an anti-detachment block provided at the front end of each of the fixing rods.

[0014] In order to achieve the effect of transporting erasers over long distances, this utility model provides a telescopic eraser. Preferably, the front ends of several of the fixed rods are inserted with erasers, and the front ends of the erasers extend through a storage box with an open front end.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This telescopic eraser uses two pressing blocks to push a sliding rod to slide freely inside two grooves, thereby driving the eraser to extend and retract. This solves the problem of existing equipment converting the rotational motion of the rotating parts into the sliding motion of the connecting parts, which causes the two elastic elements at the connection to be subjected to forces in two directions, increasing the frictional wear of the elastic elements and reducing the service life of the equipment.

[0017] This telescopic eraser, by incorporating a self-locking structure, solves the problem of existing devices that use spiral ribs to perform spiral behavior within several slotted holes. However, when the eraser is slidably pressed, a certain angle of sliding displacement occurs, ultimately causing the eraser to rotate and retract inward, reducing user comfort. Attached Figure Description

[0018] Figure 1 A schematic diagram of a preferred embodiment of the retractable eraser provided by this utility model;

[0019] Figure 2 for Figure 1 The diagram shows the internal structure of the placement box;

[0020] Figure 3 for Figure 2 The diagram shows the structure of the sliding rod.

[0021] Figure 4 for Figure 1 The diagram shows the structure of the self-locking structure.

[0022] Figure 5 for Figure 2 The diagram shows the structural design of the installation structure.

[0023] The diagram is labeled as follows: 1. Placement box; 2. Telescopic structure; 201. Slide groove; 202. Sliding rod; 3. Self-locking structure; 301. Rotary groove; 302. T-block; 303. Spring; 304. Locking block; 305. Limiting slide groove; 306. Locking groove; 307. Pressing block; 4. Installation structure; 401. Quick-release insertion hole; 402. Installation box; 403. Quick-release insertion rod; 404. Fixed insertion rod; 405. Anti-detachment block; 5. Eraser. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0025] Please refer to the following: Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 ,in, Figure 1 A schematic diagram of a preferred embodiment of the retractable eraser provided by this utility model; Figure 2 for Figure 1 The diagram shows the internal structure of the placement box; Figure 3 for Figure 2 The diagram shows the structure of the sliding rod. Figure 4 for Figure 1 The diagram shows the structure of the self-locking structure. Figure 5 for Figure 2The schematic diagram of the installation structure shown includes a telescopic eraser, a placement box 1, a telescopic structure 2 that slides inside the placement box 1, self-locking structures 3 at both ends of the telescopic structure 2, an installation structure 4 that is inserted into the front of the telescopic structure 2, and an eraser 5 that is placed on the front of the installation structure 4.

[0026] The telescopic structure 2 includes slide grooves 201 at both ends of the placement box 1, and a sliding rod 202 is slidably arranged between the two slide grooves 201.

[0027] It should be noted that the two pressing blocks 307 are used to push the sliding rod 202 to slide freely inside the two sliding grooves 201, thereby driving the eraser 5 to extend and retract.

[0028] In the specific implementation process, refer to Figure 1 and Figure 4 As shown, the self-locking structure 3 includes rotating grooves 301 at both ends of the sliding rod 202. T-shaped blocks 302 are rotatably provided at the ends of the two rotating grooves 301 that are far apart from each other. A locking block 304 is provided at the front end of the side of the two T-shaped blocks 302 that is close to the placement box 1. Limiting grooves 305 are symmetrically provided at the ends of the two sliding grooves 201 that are far apart from each other. Several locking slots 306 are provided at equal intervals at both ends of the two limiting grooves 305. A spring 303 is provided at the rear end of the side of the two T-shaped blocks 302 that is close to the placement box 1. The ends of the two springs 303 that are close to each other are fixedly connected to the sliding rod 202. A pressing block 307 is provided at the rear end of the side of the two T-shaped blocks 302 that is far away from the placement box 1.

[0029] It should be noted that: by manually pressing the two pressing blocks 307 towards one end, the two springs 303 are compressed, which causes the two locking blocks 304 to disengage from the slots 306. The two pressing blocks 307 push the sliding rod 202 to slide freely inside the two sliding grooves 201, driving the eraser 5 to extend or retract into the placement box 1. When it reaches the designated position, the two pressing blocks 307 are released, and the two springs 303 extend, controlling the two T-shaped blocks 302 to rotate and move closer to each other until the two locking blocks 304 are engaged in any slot 306, performing a self-locking action.

[0030] In the specific implementation process, refer to Figure 3 and Figure 5 As shown, the mounting structure 4 includes quick-release holes 401 symmetrically opened on the front of the sliding rod 202. Quick-release rods 403 are respectively inserted into the front of the two quick-release holes 401, and the same mounting box 402 is provided on the front of the two quick-release rods 403.

[0031] It should be noted that the mounting box 402 uses two quick-release rods 403 at the rear end to insert into the quick-release sockets 401 on the front of the sliding rod 202 for flexible docking and installation.

[0032] In the specific implementation process, refer to Figure 5 As shown, the installation box 402 is a box with an open front. Several fixing rods 404 are evenly arranged on the front of the installation box 402. Each fixing rod 404 has an anti-detachment block 405 at its front end. An eraser 5 is inserted into the front end of the fixing rod 404. The front end of the eraser 5 extends through the placement box 1, which has an open front end.

[0033] It should be noted that: several fixed plug rods 404 are used to fix the eraser 5, thus initially fixing the eraser 5. At the same time, several anti-detachment blocks 405 increase the friction between the fixed plug rods 404 and the eraser 5, significantly improving the connection stability.

[0034] The working principle of the retractable eraser provided by this utility model is as follows:

[0035] In use, several fixed inserts 404 are used to fix the eraser 5, thus initially fixing the eraser 5. At the same time, several anti-detachment blocks 405 increase the friction between the fixed inserts 404 and the eraser 5. Then, the mounting box 402 uses two quick-release inserts 403 at the rear end to be inserted into the quick-release holes 401 on the front of the sliding rod 202. The two pressing blocks 307 are pressed manually towards the end that is close to each other, which compresses the two springs 303. Then, the two locking blocks 304 are disengaged from the slots 306. The two pressing blocks 307 are used to push the sliding rod 202 to slide freely in the two slots 201, driving the eraser 5 to extend or retract into the placement box 1. When it reaches the designated position, the two pressing blocks 307 are released, and the two springs 303 extend, controlling the two T-shaped blocks 302 to rotate and move closer to each other until the two locking blocks 304 are locked into any slot 306, performing a self-locking action.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A retractable eraser, including a storage box (1), characterized in that, The placement box (1) is equipped with a telescopic structure (2) that slides inside. The telescopic structure (2) is equipped with a self-locking structure (3) at both ends. The telescopic structure (2) is connected to an installation structure (4) on the front side. The installation structure (4) is equipped with an eraser (5) on the front side. The telescopic structure (2) includes a slide groove (201) opened at both ends of the placement box (1), and a slide rod (202) is slidably arranged between the two slide grooves (201). The self-locking structure (3) includes rotating grooves (301) at both ends of the sliding rod (202). T-shaped blocks (302) are rotatably provided at the ends of the two rotating grooves (301) that are far apart from each other. A locking block (304) is provided at the front end of the side of the two T-shaped blocks (302) that is close to the placement box (1). Limiting grooves (305) are symmetrically provided at the ends of the two sliding grooves (201) that are far apart from each other. Several locking grooves (306) are provided at equal intervals at both ends of the two limiting grooves (305). The mounting structure (4) includes quick-release holes (401) symmetrically opened on the front of the sliding rod (202), quick-release rods (403) are respectively inserted into the front of the two quick-release holes (401), and the same mounting box (402) is provided on the front of the two quick-release rods (403).

2. The retractable eraser according to claim 1, characterized in that, Each of the two T-shaped blocks (302) is provided with a spring (303) at the rear end of the side of the placement box (1), and the ends of the two springs (303) that are close to each other are fixedly connected to the sliding rod (202).

3. The retractable eraser according to claim 1, characterized in that, Each of the two T-shaped blocks (302) has a pressing block (307) at its rear end on the side away from the placement box (1).

4. The retractable eraser according to claim 1, characterized in that, The mounting box (402) is a box with an open front. Several fixing rods (404) are evenly arranged on the front of the mounting box (402), and anti-detachment blocks (405) are provided at the front ends of the fixing rods (404).

5. The retractable eraser according to claim 4, characterized in that, An eraser (5) is inserted into the front end of several of the fixed inserts (404), and the front end of the eraser (5) extends through the placement box (1) which has an open box shape at the front end.

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