Pressing telescopic eraser

Abstract

The pressing telescopic eraser comprises a shell, a pressing piece and an eraser fixedly connected to the lower end of the pressing piece, the shell is provided with a containing cavity with an upper opening and a lower opening, and the pressing piece and the eraser are arranged in the containing cavity in a sliding mode and can slide along the containing cavity so that the eraser can stretch out of the containing cavity or be contained in the containing cavity. A limiting structure for limiting the pressing piece to slide out of the containing cavity is arranged in the containing cavity, an elastic piece for enabling the pressing piece to rebound after being pressed downwards is arranged between the limiting structure and the pressing piece, and when the pressing piece is pressed downwards, the pressing piece drives the eraser to extend out of the lower opening of the containing cavity; when the pressing piece loses force, the pressing piece moves upwards under the elastic force effect of the elastic piece and drives the eraser to retract into the containing cavity. Compared with the prior art, the telescopic eraser has the advantages that the telescopic eraser is more labor-saving, and the phenomenon that the pressing piece is blocked in the telescopic process of the eraser is avoided.

Description

Technical Field

[0001] This utility model relates to the field of eraser technology, and in particular to a press-and-retract eraser. Background Technology

[0002] Erasers are a common stationery item, usually made of rubber, primarily used to erase pencil or ink marks. Traditional erasers are typically wrapped in paper or plastic to keep the surface clean, with only a portion exposed. However, after prolonged use, erasers with the exposed outer packaging require either pushing the eraser out of the packaging or removing the packaging itself before use. Pushing it out is inconvenient, requiring it to be done every time. Removing the packaging can leave stains on the eraser surface, affecting its erasing effectiveness and potentially leaving residue on the paper. To address this issue, retractable erasers have emerged on the market.

[0003] For example, Chinese utility model patent CN216733674U, entitled "A Telescopic Eraser," includes a housing and an eraser assembly. The eraser assembly is telescopically disposed within the housing and extends from one end of the housing. The housing has a strip-shaped through hole, and at least one side of the strip-shaped through hole is serrated along its length. The eraser assembly includes a push button and an eraser. The eraser is slidably disposed within the housing. The push button is located on one side of the housing and connected to the eraser. The push button has a backlash protrusion.

[0004] In the above solution, when using the eraser, push the button to extend the eraser from one end of the housing and limit it through the protrusions and serrations. After the eraser is used, push the button in the opposite direction to retract the eraser into the housing. During the process of extending and retracting, the eraser needs to overcome the friction of the protrusions and serrations, making the eraser difficult to use and prone to jamming. Utility Model Content

[0005] This invention addresses the problem that erasers are difficult to use and prone to jamming during extension and retraction due to the friction between protrusions and serrations. The technical problem to be solved by this invention is to provide a press-and-retract eraser.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a press-and-retractable eraser, including a housing, a pressing element, and an eraser fixedly connected to the lower end of the pressing element. The housing has a storage cavity with openings at the top and bottom. The pressing element and the eraser are slidably disposed in the storage cavity and can slide along the storage cavity to allow the eraser to extend out of the storage cavity or be stored in the storage cavity. The storage cavity is provided with a limiting structure to restrict the pressing element from sliding out of the storage cavity. An elastic element is provided between the limiting structure and the pressing element to allow the pressing element to rebound after being pressed down. When the pressing element is pressed down, the pressing element drives the eraser to extend out from the lower opening of the storage cavity. When the pressing element loses force, the pressing element moves upward under the elastic force of the elastic element and drives the eraser to retract into the storage cavity.

[0007] A further preferred embodiment of this utility model is as follows: the limiting structure includes a limiting baffle and a limiting groove in which the limiting baffle is fitted. The limiting baffle is fixedly connected in the receiving cavity and can slide up and down relative to the limiting groove. The limiting groove is located on the pressing member. The limiting groove has a downward opening and a hook that hooks onto the bottom of the limiting baffle at the opening.

[0008] A further preferred embodiment of this utility model is: the elastic element is a reset spring, the reset spring is located in the limiting groove, one end of the reset spring abuts against the limiting baffle, and the other end abuts against the bottom of the limiting groove.

[0009] A further preferred embodiment of this utility model is: the limiting baffle is provided with a first positioning post for installing a reset spring, and the bottom of the limiting groove is provided with a second positioning post for installing a reset spring.

[0010] A further preferred embodiment of this utility model is: the pressing component includes a button and a mounting base, the button is fixed on the mounting base and extends out of the storage cavity, and the mounting base is slidably disposed in the storage cavity.

[0011] A further preferred embodiment of this utility model is as follows: the mounting base includes a top plate, a left side plate, and a right side plate, the left side plate and the right side plate are located on both sides of the top plate and together with the top plate to form the limiting groove, and the hook body is located at the lower end of the left side plate and the right side plate.

[0012] A further preferred embodiment of this utility model is: the two sides of the rubber are respectively fixed to the left side plate and the right side plate at one end near the hook body.

[0013] A further preferred embodiment of this utility model is that the left side plate and the right side plate are elastic.

[0014] A further preferred embodiment of this utility model is as follows: symmetrical guide grooves are provided on two opposite side walls of the housing in a vertical direction, and the pressing member is provided with protrusions that cooperate with the two guide grooves. When the pressing member slides up and down, the protrusions slide up and down in the guide grooves.

[0015] A further preferred embodiment of this utility model is: the elastic element is an elastic sheet, the elastic sheet is located in the limiting groove, one end of the elastic sheet is fixed to the limiting baffle, and the other end is fixed to the bottom of the limiting groove.

[0016] Compared with the prior art, this utility model has the following advantages: A pressing member is slidably arranged within the mounting cavity of the housing, and the rubber is fixedly connected to the lower end of the pressing member. Pressing down on the pressing member causes the rubber to extend from the lower opening of the storage cavity. When the pressing member loses its force, it moves upward under the elastic force of the elastic element, causing the rubber to retract back into the storage cavity. During the rubber's extension, only the elastic force of the elastic element needs to be overcome; the friction between the pressing member and the storage cavity is negligible. Compared to the prior art, which requires overcoming the friction between protrusions and serrations, this utility model is more labor-saving, and the pressing member will not jam during the rubber's extension and retraction. Attached Figure Description

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are drawn only for the purpose of explaining the preferred embodiments and therefore should not be regarded as a limitation on the scope of the present invention. In addition, unless otherwise specified, the drawings are only schematic representations of the composition or structure of the described objects and may contain exaggerated displays, and the drawings are not necessarily drawn to scale.

[0018] Figure 1 This is a three-dimensional structural diagram of a preferred embodiment of the present invention;

[0019] Figure 2 This is a top view of a preferred embodiment of the present invention;

[0020] Figure 3 This is a preferred embodiment of the present utility model. Figure 2 Sectional view at point AA;

[0021] Figure 4 This is a three-dimensional structural diagram of the pressing component in a preferred embodiment of the present invention;

[0022] Figure 5 This is a cross-sectional view of the pressing component in a preferred embodiment of the present invention;

[0023] Figure 6 This is an exploded view of a preferred embodiment of the present invention.

[0024] In the diagram: 1. Housing; 11. Storage cavity; 12. Limiting baffle; 121. First positioning post; 13. Guide groove; 2. Pressing element; 21. Button; 22. Mounting base; 221. Top plate; 222. Left side plate; 223. Right side plate; 224. Limiting groove; 225. Second positioning post; 226. Hook; 227. Protrusion; 228. Left fixing plate; 229. Right fixing plate; 3. Rubber; 4. Return spring. Detailed Implementation

[0025] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0026] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it may not be further defined and explained in subsequent figures.

[0027] This embodiment mainly describes a press-and-retractable eraser, as detailed below:

[0028] like Figures 1 to 6 As shown, a press-and-retractable eraser includes a housing 1, a pressing member 2, and an eraser 3 fixedly connected to the lower end of the pressing member 2. The housing 1 protects the eraser 3 from contamination. The housing 1 has a storage cavity 11 with openings at the top and bottom for storing the eraser 3. The pressing member 2 and the eraser 3 are slidably disposed within the storage cavity 11 and can slide along the storage cavity 11, allowing the eraser 3 to extend out of or be stored within the storage cavity 11. A limiting structure is provided within the storage cavity 11 to restrict the pressing member 2 from sliding out of the storage cavity 11. An elastic element is provided between the limiting structure and the pressing member 2 to allow the pressing member 2 to rebound after being pressed down. Pressing element 2 causes eraser 3 to extend from the lower opening of storage cavity 11. When pressing element 2 loses its force, it moves upward under the elastic force of the elastic element, causing eraser 3 to retract into storage cavity 11. When using eraser 3, manually press down on pressing element 2. Pressing element 2 slides downward along storage cavity 11, thus pushing eraser 3 out from the lower opening of storage cavity 11 and erasing pencil or ink marks. During use, the elastic element remains compressed. When eraser 3 is used up, press down on pressing element 2. At this time, pressing element 2 slides upward back to its initial position under the elastic force of the elastic element, and eraser 3 also retracts into storage cavity 11 as pressing element 2 slides. During the process of extending eraser 3, only the elastic force of the elastic element needs to be overcome. The friction between pressing element 2 and storage cavity 11 is negligible. Compared with the existing telescopic eraser 3, which needs to overcome the friction between protrusions and serrations, this utility model is more labor-saving, and pressing element 2 will not get stuck during the extension and retraction of eraser 3.

[0029] Specifically, the housing 1 has symmetrical guide grooves 13 arranged vertically on two opposite side walls. The pressing member 2 has protrusions 227 that cooperate with the two guide grooves 13. When the pressing member 2 slides up and down, the protrusions 227 slide up and down within the guide grooves 13. The guide grooves 13 guide the pressing member 2, guiding it to slide along the guide grooves 13, preventing it from shifting and getting stuck during sliding. The guide grooves 13 also have a limiting function, but when the protrusions 227 slide to the bottom of the guide grooves 13, the guide grooves 13 restrict the pressing member 2 from sliding further downward. To prevent the rubber 3 from becoming shorter and thinner after a period of use, when the protrusions 227 slide to the bottom of the guide grooves 13, the bottom surface of the rubber 3 is flush with the housing 1 and cannot be fully extended for use, resulting in waste. Therefore, the depth of the guide grooves 13 is set to be the same as the height of the rubber 3. When the bottom surface of the protrusions 227 contacts the bottom of the guide grooves 13, the rubber 3 is completely exposed outside the housing 1.

[0030] like Figure 3 , Figure 5 and Figure 6 As shown, the limiting structure includes a limiting baffle 12 and a limiting groove 224 in which the limiting baffle 12 is fitted. The limiting baffle 12 is fixedly connected to the storage cavity 11 and can slide up and down relative to the limiting groove 224. The limiting baffle 12 is preferably integrally formed with the storage cavity 11. The limiting groove 224 is located on the pressing member 2. The limiting groove 224 has a downward groove opening. The groove opening has a hook 226 that hooks onto the bottom of the limiting baffle 12. The cooperation between the hook 226 and the limiting baffle 12 can limit the pressing member 2 and prevent the pressing member 2 from sliding out of the storage cavity 11 from the opening under the elastic force of the elastic member.

[0031] Specifically, the elastic element can be a return spring 4 or an elastic sheet. The elastic element is located in the limiting groove 224. When the elastic element is a return spring 4, one end of the return spring 4 abuts against the limiting baffle 12, and the other end abuts against the bottom of the limiting groove 224. To prevent the pressing part 2 from squeezing the return spring 4 during the sliding process and causing the return spring 4 to fall off, the limiting baffle 12 is provided with a first positioning post 121 for installing the return spring 4, and the bottom of the limiting groove 224 is provided with a second positioning post 225 for installing the return spring 4. When the elastic element is an elastic sheet, one end of the elastic sheet is fixed to the limiting baffle 12, and the other end is fixed to the bottom of the limiting groove 224.

[0032] Specifically, the pressing component 2 includes a button 21 and a mounting base 22. The button 21 is fixed on the mounting base 22 and extends out of the storage cavity 11 from the upper opening of the storage cavity 11. The mounting base 22 is slidably disposed in the storage cavity 11. The mounting base 22 includes a top plate 221, a left side plate 222 and a right side plate 223. The left side plate 222 and the right side plate 223 are located on both sides of the top plate 221 and surround the top plate 221 to form a limiting groove 224. The hook body 226 is located at the lower end of the left side plate 222 and the right side plate 223. The rubber 3 is fixed on both sides of the left side plate 222 and the right side plate 223 near the hook body 226. The rubber 3 can be fixed on the left side plate 222 and the right side plate 223 by glue, screws or other means.

[0033] like Figure 6 As shown, to enhance the stability of the top plate 221 and the left side plate 222, and the top plate 221 and the right side plate 223, a left fixing plate 228 is provided between the top plate 221 and the left side plate 222, respectively perpendicular to the top plate 221 and the left side plate 222. The left fixing plate 228 is fixedly connected to the top plate 221 and the left side plate 222. A right fixing plate 229 is provided between the top plate 221 and the right side plate 223, respectively perpendicular to the top plate 221 and the right side plate 223. The right fixing plate 229 is fixedly connected to the top plate 221 and the right side plate 223.

[0034] Specifically, for ease of installation, the left side plate 222 and the right side plate 223 are made of an elastic material. During installation, the steps are as follows: First, move the ends of the left side plate 222 and the right side plate 223 to both sides to enlarge the opening of the limiting groove 224; Second, insert the limiting baffle 12 into the limiting groove 224 from the opening to reset the left side plate 222 and the right side plate 223; Third, put the springs on the first positioning post 121 and the second positioning post 225 respectively; Fourth, fix the rubber 3 to the lower end of the left side plate 222 and the right side plate 223.

[0035] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0036] The above provides a detailed description of a press-and-retractable eraser provided by this utility model. Specific examples have been used to illustrate the principle and implementation of this utility model. The description of the above embodiments is only for the purpose of helping to understand this utility model and its core ideas. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A press-and-retractable eraser, comprising a housing, a pressing element, and an eraser fixedly connected to the lower end of the pressing element, wherein the housing has a storage cavity with openings at the top and bottom, and the pressing element and the eraser are slidably disposed within the storage cavity and can slide along the storage cavity to extend the eraser out of the storage cavity or store it within the storage cavity, characterized in that: The storage cavity is provided with a limiting structure to prevent the pressing component from sliding out of the storage cavity. Between the limiting structure and the pressing component, there is an elastic element that causes the pressing component to rebound after being pressed down. When the pressing component is pressed down, the pressing component causes the rubber to extend out from the lower opening of the storage cavity. When the pressing component loses force, the pressing component moves upward under the elastic force of the elastic element and causes the rubber to retract back into the storage cavity.

2. The press-and-retract eraser according to claim 1, characterized in that: The limiting structure includes a limiting baffle and a limiting groove in which the limiting baffle is fitted. The limiting baffle is fixedly connected in the receiving cavity and can slide up and down relative to the limiting groove. The limiting groove is located on the pressing member. The limiting groove has a downward opening and a hook that hooks onto the bottom of the limiting baffle at the opening.

3. A press-and-retract eraser according to claim 2, characterized in that: The elastic element is a reset spring, which is located in the limiting groove. One end of the reset spring abuts against the limiting baffle, and the other end abuts against the bottom of the limiting groove.

4. A press-and-retractable eraser according to claim 3, characterized in that: The limiting baffle is provided with a first positioning post for installing a reset spring, and the bottom of the limiting groove is provided with a second positioning post for installing a reset spring.

5. A press-and-retractable eraser according to claim 2, characterized in that: The pressing component includes a button and a mounting base. The button is fixed on the mounting base and extends out of the storage cavity, while the mounting base is slidably disposed inside the storage cavity.

6. A press-and-retractable eraser according to claim 5, characterized in that: The mounting base includes a top plate, a left side plate, and a right side plate. The left side plate and the right side plate are located on both sides of the top plate and together with the top plate to form the limiting groove. The hook body is located at the lower end of the left side plate and the right side plate.

7. A press-and-retractable eraser according to claim 6, characterized in that: The rubber is fixed on both sides of the left and right side plates, respectively, at one end near the hook body.

8. A press-and-retractable eraser according to claim 6, characterized in that: The left and right side plates are elastic.

9. A press-and-retractable eraser according to claim 1, characterized in that: The housing has symmetrical guide grooves arranged vertically on two opposite side walls. The pressing member has protrusions that cooperate with the two guide grooves. When the pressing member slides up and down, the protrusions slide up and down in the guide grooves.

10. A press-and-retractable eraser according to claim 2, characterized in that: The elastic element is an elastic sheet, which is located in the limiting groove. One end of the elastic sheet is fixed to the limiting baffle, and the other end is fixed to the bottom of the limiting groove.

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