Electric eraser

Abstract

The utility model discloses an electric eraser which comprises an upper cylinder body and a lower cylinder body, one end of the upper cylinder body is provided with a containing cavity, a motor is arranged in the containing cavity, the motor is provided with a positive wire and a negative wire, an output shaft of the motor extends out of the containing cavity, an annular groove is formed by the containing cavity and the inner wall of the upper cylinder body, and the annular groove is connected with a carrying piece in a rotating mode. The object carrying piece is fixedly connected with an output shaft of the motor, and the object carrying piece is provided with an eraser; an embedding groove is formed in the side wall of the lower barrel, a conductive copper sheet is arranged in the embedding groove, a switch board and a battery are arranged at one end of the lower barrel, a positive electrode contact area and a negative electrode contact area are arranged on the switch board, a positive electrode wire and a negative electrode wire are connected to the positive electrode contact area and the negative electrode contact area respectively, and a negative electrode of the battery abuts against the negative electrode contact area. And the lower cylinder body is rotated to enable the conductive copper sheet to be respectively contacted with the anode contact area and the anode of the battery for conduction. According to the electric eraser, the structure is compact, the product size is greatly reduced, switch triggering is carried out in a rotating mode, and the risk of mistaken touch opening is reduced.

Description

Technical Field

[0001] This utility model relates to the field of eraser technology, and in particular to an electric eraser. Background Technology

[0002] Electric erasers use a built-in miniature motor and dry cell batteries to drive the eraser to rotate at high speed, erasing mistakes and scribblings. Compared to traditional manual erasers, electric erasers are faster, more accurate, and less likely to smudge or tear the paper.

[0003] Existing electric erasers, such as the one provided by Chinese Patent CN202320076203.3, include an eraser body, which includes a housing, an eraser head, and a transmission component. The transmission component is located inside the housing, and the eraser head is located at one end of the housing and connected to the transmission component. The eraser head includes a rubber sleeve fixed to the transmission component, a first eraser embedded in the rubber sleeve, a rubber cap fitted on the rubber sleeve, and a second eraser fitted on the rubber cap. The transmission component includes a hollow transmission sleeve and a first gear. One end of the transmission sleeve has a gear rack that meshes with the first gear, and the end of the transmission sleeve away from the gear rack has two second gears and two third gears built in. The second gears and third gears mesh with each other and are fixed to a connecting shaft.

[0004] The electric erasers mentioned above are relatively large and inconvenient to carry around; moreover, the button-activated design makes them easy to accidentally turn on, resulting in unnecessary power waste. Utility Model Content

[0005] The purpose of this invention is to provide an electric eraser that is small in size and can be installed at the end of a pencil, thus reducing the risk of accidental activation.

[0006] The technical solution adopted by the electric eraser disclosed in this utility model is:

[0007] An electric eraser includes an upper cylinder and a lower cylinder. One end of the upper cylinder has a receiving cavity containing a motor. The motor has a positive wire and a negative wire at its end. The motor output shaft extends out of the receiving cavity. The receiving cavity and the inner wall of the upper cylinder form an annular groove. A carrier is rotatably connected to the annular groove. One end of the carrier is fixedly connected to the motor output shaft, and the other end of the carrier contains the eraser. The lower cylinder is rotatably connected to the other end of the upper cylinder, and its side wall has an embedding groove. The embedded groove contains a conductive copper sheet. One end of the lower cylinder is equipped with a switch plate and a battery. The switch plate has a positive contact area and a negative contact area. The positive contact area is located on the side wall of the switch plate, and the negative contact area is located in the middle of the switch plate. The positive wire and the negative wire are respectively connected to the positive contact area and the negative contact area. The negative terminal of the battery touches the negative contact area. Rotating the lower cylinder causes the conductive copper sheet to contact the positive contact area and the positive terminal of the battery respectively, thereby triggering the motor to rotate the load.

[0008] As a preferred embodiment, the accommodating cavity is provided with multiple hooks, which are used to secure the bottom of the motor.

[0009] As a preferred embodiment, the other end of the carrier is a bearing groove, and the inner wall of the bearing groove is provided with a protrusion, which is fixed by contacting the outer wall of the eraser.

[0010] As a preferred embodiment, both the outer wall of one end of the loading component and the outer wall of one end of the lower cylinder are provided with annular slide rails, and both the inner wall of the annular groove and the other end of the upper cylinder are provided with multiple sliders. The annular slide rail on the outer wall of one end of the loading component and the multiple sliders on the inner wall of the annular groove are slidably connected, and the annular slide rail on the outer wall of one end of the lower cylinder and the multiple sliders on the other end of the upper cylinder are slidably connected.

[0011] As a preferred embodiment, the upper cylinder is provided with a first raised texture, which is arranged along the extending direction of the upper cylinder.

[0012] As a preferred embodiment, the lower cylinder is provided with a second raised texture, which surrounds the lower cylinder.

[0013] As a preferred embodiment, the switch board and the battery are stacked sequentially inside the lower cylinder.

[0014] As a preferred embodiment, the end of the battery furthest from the switch board is provided with an elastic pad.

[0015] The beneficial effects of the electric eraser disclosed in this utility model are as follows: An electric eraser includes an upper cylinder and a lower cylinder. One end of the upper cylinder is provided with a receiving cavity, and a motor is provided in the receiving cavity. The end of the motor is provided with a positive wire and a negative wire. The output shaft of the motor extends out of the receiving cavity. The receiving cavity and the inner wall of the upper cylinder form an annular groove. A carrier is rotatably connected to the annular groove. One end of the carrier is fixedly connected to the output shaft of the motor, and the other end of the carrier is provided with an eraser. The lower cylinder is rotatably connected to the other end of the upper cylinder. The structure is compact, which greatly reduces the product volume. Moreover, the other end of the lower cylinder can be fitted onto the end of a pencil for convenient carrying. The lower cylinder has an embedded groove on its side wall, and a conductive copper sheet is placed in the embedded groove. A switch plate and a battery are provided at one end of the lower cylinder. The switch plate has a positive contact area and a negative contact area. The positive contact area is located on the side wall of the switch plate, and the negative contact area is located in the middle of the switch plate. The positive and negative wires are respectively connected to the positive and negative contact areas. The negative terminal of the battery touches the negative contact area. Rotating the lower cylinder causes the conductive copper sheet to contact the positive contact area and the positive terminal of the battery respectively, thus triggering the motor to rotate the load. The switch is triggered by rotation, reducing the risk of accidental activation. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of an electric eraser according to this utility model;

[0017] Figure 2 This is an exploded structural diagram of an electric eraser according to the present invention;

[0018] Figure 3 This is a cross-sectional schematic diagram of an electric eraser according to the present invention;

[0019] Figure 4 This is an exploded view of the lower cylinder and motor of an electric eraser according to this utility model;

[0020] Figure 5 This is a schematic diagram of the structure of an electric eraser carrier according to this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of an electric eraser connected to a pencil according to this utility model;

[0022] As shown in the figure, specific structures and devices are labeled in the figure to clearly illustrate the structure of the embodiments of the present invention. However, this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs, and such adjustments or modifications are still included in the scope of the appended claims. Detailed Implementation

[0023] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings. It should also be noted that, in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art can also use other alternative methods to implement some well-known technologies; moreover, the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit the present invention.

[0024] It should be noted that embodiments referred to in the specification as "an embodiment," "an embodiment," "an exemplary embodiment," or "some embodiments" may include specific features, structures, or characteristics, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0025] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0026] It is understood that the meanings of “on”, “above” and “above” in this disclosure should be interpreted in the broadest sense, such that “on” means not only “directly on” something, but also includes something with an intermediary feature or layer, and that “above” or “above” means not only “on” something, but also includes something “above” or “above” without an intermediary feature or layer.

[0027] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0028] Please refer to Figure 1-6 An electric eraser includes an upper cylinder 10 and a lower cylinder 30.

[0029] The upper cylinder 10 has a receiving cavity 11 at one end, and a motor 13 is installed inside the receiving cavity 11. The motor 13 has a positive wire 121 and a negative wire 122 at its end. The output shaft of the motor 13 extends out of the receiving cavity 11. The receiving cavity 11 and the inner wall of the upper cylinder 10 form an annular groove 14. A carrying component 20 is rotatably connected to the annular groove 14. One end of the carrying component 20 is fixedly connected to the output shaft of the motor 13, and the other end of the carrying component 20 is equipped with an eraser 21. The lower cylinder 30 is rotatably connected to the other end of the upper cylinder 10, making the overall structure compact and greatly reducing the product volume. The other end of the lower cylinder 30 can be fitted onto the end of a pencil for easy carrying.

[0030] The lower cylinder 30 has an embedded groove 35 on its side wall, and a conductive copper sheet 351 is provided in the embedded groove 35. A switch plate 31 and a battery 32 are provided at one end of the lower cylinder 30. The switch plate 31 has a positive contact area 311 and a negative contact area 312. The positive contact area 311 is located on the side wall of the switch plate 31, and the negative contact area 312 is located in the middle of the switch plate 31. The positive wire 121 and the negative wire 122 are respectively connected to the positive contact area 311 and the negative contact area 312. The negative terminal 322 of the battery 32 touches the negative contact area 312. Rotating the lower cylinder 30 causes the conductive copper sheet 351 to contact the positive contact area 311 and the positive terminal 321 of the battery 32 respectively, thereby triggering the motor 13 to turn on and drive the load 20 to rotate. The switch is triggered by rotation, reducing the risk of accidental activation.

[0031] Please refer to Figure 3 and Figure 4 Specifically, the accommodating cavity 11 is provided with multiple hooks 111 and positioning posts 16. The hooks 111 are engaged with the bottom of the motor 13 for fixation, and the positioning posts 16 are engaged with the positioning holes 313 on the switch plate 31 for fixation. When the upper cylinder 10 and the lower cylinder 30 rotate, the switch plate 31 will rotate accordingly under the clamping of the positioning posts 16, that is, the switch plate 31 and the motor 13 remain relatively stationary.

[0032] Please refer to Figure 5 The other end of the carrier 20 is a bearing groove 22. The inner wall of the bearing groove 22 is provided with a protrusion 221. The protrusion 221 contacts the outer wall of the eraser 21 for fixation. During the rotation of the carrier 20, the eraser 21 is more firmly fixed, and relative rotation between the carrier 20 and the eraser 21 is avoided.

[0033] Specifically, both the outer wall of one end of the carrying component 20 and the outer wall of one end of the lower cylinder 30 are provided with annular slide rails 41, and the inner wall of the annular groove 14 and the other end of the upper cylinder 10 are provided with multiple sliders 42. The annular slide rail 41 on the outer wall of one end of the carrying component 20 and the multiple sliders 42 on the inner wall of the annular groove 14 are slidably connected, and the annular slide rail 41 on the outer wall of one end of the lower cylinder 30 and the multiple sliders 42 on the other end of the upper cylinder 10 are slidably connected. By the sliding of the two sets of sliders 42 in conjunction with the annular slide rail 41, the upper cylinder 10 and the carrying component 20, as well as the upper cylinder 10 and the lower cylinder 30, are rotatably connected.

[0034] The upper cylinder 10 is provided with a first raised texture 15, which is arranged along the extension direction of the upper cylinder 10, so that the user can rotate the upper cylinder 10 to make the contact pin 12 rotate and contact the electrode contact piece 311.

[0035] The lower cylinder 30 is provided with a second raised texture 34, which surrounds the lower cylinder 30, making it convenient for the user to put the lower cylinder 30 on the end of the pencil 50 or to pull the lower cylinder 30 off the end of the pencil 50.

[0036] The switch board 31 and battery 32 are stacked sequentially inside the lower cylinder 30. The stacking design can effectively reduce the overall volume.

[0037] An elastic pad 33 is provided at the end of the battery 32 away from the switch plate 31. When the lower cylinder 30 is pressed and sleeved on the end of the pencil 50, the elastic pad 33 can play a buffering role to prevent excessive pressing pressure from squeezing the battery 32.

[0038] This utility model provides an electric eraser, comprising an upper cylinder and a lower cylinder. One end of the upper cylinder has a receiving cavity, within which a motor is housed. The motor has a positive wire and a negative wire at its end, and its output shaft extends out of the receiving cavity. The receiving cavity and the inner wall of the upper cylinder form an annular groove, which is rotatably connected to a carrier. One end of the carrier is fixedly connected to the motor output shaft, and the other end of the carrier houses the eraser. The lower cylinder is rotatably connected to the other end of the upper cylinder. The compact structure significantly reduces the product's size, and the other end of the lower cylinder can be fitted onto the end of a pencil for convenient carrying. The lower cylinder has an embedded groove on its side wall, and a conductive copper sheet is placed in the embedded groove. A switch plate and a battery are provided at one end of the lower cylinder. The switch plate has a positive contact area and a negative contact area. The positive contact area is located on the side wall of the switch plate, and the negative contact area is located in the middle of the switch plate. The positive and negative wires are respectively connected to the positive and negative contact areas. The negative terminal of the battery touches the negative contact area. Rotating the lower cylinder causes the conductive copper sheet to contact the positive contact area and the positive terminal of the battery respectively, thus triggering the motor to rotate the load. The switch is triggered by rotation, reducing the risk of accidental activation.

[0039] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. An electric eraser, characterized in that, The device includes an upper cylinder, one end of which has a receiving cavity. A motor is installed inside the receiving cavity. A positive wire and a negative wire are installed at the end of the motor. The output shaft of the motor extends out of the receiving cavity. The receiving cavity and the inner wall of the upper cylinder form an annular groove. A carrying component is rotatably connected to the annular groove. One end of the carrying component is fixedly connected to the output shaft of the motor. An eraser is installed at the other end of the carrying component. The lower cylinder is rotatably connected to the other end of the upper cylinder. An embedding groove is formed on the side wall of the lower cylinder, and a conductive copper sheet is placed within the groove. A switch plate and a battery are located at one end of the lower cylinder. The switch plate has a positive contact area and a negative contact area. The positive contact area is located on the side wall of the switch plate, and the negative contact area is located in the middle of the switch plate. The positive and negative wires are connected to the positive and negative contact areas, respectively. The negative terminal of the battery touches the negative contact area. Rotating the lower cylinder causes the conductive copper sheet to contact the positive contact area and the positive terminal of the battery, thus triggering the motor to rotate the load.

2. An electric eraser as described in claim 1, characterized in that, The accommodating cavity is provided with multiple hooks, which are used to secure the bottom of the motor.

3. An electric eraser as described in claim 2, characterized in that, The other end of the carrier is a bearing groove, and the inner wall of the bearing groove is provided with a protrusion, which is fixed by contacting the outer wall of the eraser.

4. An electric eraser as described in claim 3, characterized in that, Both the outer wall of one end of the loading component and the outer wall of one end of the lower cylinder are provided with annular slide rails. Both the inner wall of the annular groove and the other end of the upper cylinder are provided with multiple sliders. The annular slide rail on the outer wall of one end of the loading component and the multiple sliders on the inner wall of the annular groove are slidably connected. The annular slide rail on the outer wall of one end of the lower cylinder and the multiple sliders on the other end of the upper cylinder are slidably connected.

5. An electric eraser as described in claim 4, characterized in that, The upper cylinder is provided with a first raised texture, which is arranged along the extending direction of the upper cylinder.

6. An electric eraser as described in claim 5, characterized in that, The lower cylinder is provided with a second raised texture, which surrounds the lower cylinder.

7. An electric eraser as described in any one of claims 1-6, characterized in that, The switch board and battery are stacked sequentially inside the lower cylinder.

8. An electric eraser as described in claim 7, characterized in that, An elastic pad is provided at the end of the battery away from the switch board.

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