PORTABLE PAPER SHREDDER

Provided is a portable paper shredder, relating to the technical field of portable paper shredding devices. The portable paper shredder includes a chassis and a core disposed in the chassis. The core includes a rotating drive member and a cutter assembly that are in transmission connection. The chassis is provided with a paper shredding passage. A paper shredding end of the cutter assembly is located in the paper shredding passage. The paper shredding passage penetrates the chassis. Two ends of the paper shredding passage are provided with a paper feeding end opening and a paper outfeeding end opening separately. A side of the paper shredding passage extends outwards and forms an open notch on the sidewall of the chassis. The open notch directly communicates with the paper feeding end opening. Therefore, the portable paper shredder can broaden the application scope, help achieve miniaturization and improve portability.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to Chinese patent application No. 202222016815.1 filed with the CNIPA on Aug. 2, 2022, the disclosure of which is incorporated herein by reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to the technical field of portable paper shredding devices and, in particular, to a portable paper shredder.

BACKGROUND

A paper shredder is an office device composed of a group of rotating blades, a paper comb and a drive motor. A sheet of paper is fed from the space between the blades engaged with each other and is shredded into a lot of pieces for confidentiality.

As a kind of paper shredder, a portable paper shredder is small and lightweight and is very easy to carry. However, since the volume of the portable paper shredder needs to be strictly controlled, the size of a paper feeding mouth is too small to satisfy the paper shredding requirements of A4 paper and paper with larger sizes, so the sheet of paper needs to be folded to adapt to the paper feeding mouth, increasing load on the motor and being unable to perform partial paper shredding on the sheet of paper.

Therefore, a portable paper shredder is urgently needed to solve the preceding technical problems.

SUMMARY

Based on the preceding description, the present disclosure provides a portable paper shredder to broaden the application scope of the portable paper shredder, help achieve miniaturization and improve portability. In this way, there is no need to fold a sheet of paper for paper feeding so that load and torque requirements of a rotating drive member can be lowered to select a rotating drive member having a lower power, reducing the production cost and fulfilling the function of partial paper shredding.

To achieve the preceding object, the present disclosure provides the technical solutions below.

A portable paper shredder is provided. The portable paper shredder includes a chassis and a core disposed in the chassis, where the core includes a rotating drive member and a cutter assembly that are in transmission connection, the chassis is provided with a paper shredding passage, a paper shredding end of the cutter assembly is located in the paper shredding passage, the paper shredding passage penetrates the chassis, two ends of the paper shredding passage are provided with a paper feeding end opening and a paper outfeeding end opening separately, a side of the paper shredding passage extends outwards and forms an open notch on a sidewall of the chassis, and the open notch directly communicates with the paper feeding end opening.

In an exemplary embodiment, along a penetration direction of the paper shredding passage, the open notch penetrates the sidewall of the chassis and directly communicates with the paper outfeeding end opening.

In an exemplary embodiment, the chassis includes a first housing and a second housing that are interconnected, and the first housing and the second housing are each a hollow structure and are enclosed to form a cavity structure to accommodate the core.

In an exemplary embodiment, the paper shredding passage penetrates the first housing and the second housing, the paper feeding end opening is disposed on the first housing, and the paper outfeeding end opening is disposed on the second housing.

In an exemplary embodiment, a first reinforcement plate is disposed inside the cavity structure, is connected to the first housing and located between the first housing and the cutter assembly and is a U-shaped plate structure, and the paper shredding passage is inserted through a bypass groove of the first reinforcement plate; and/or a second reinforcement plate is disposed inside the cavity structure, is connected to the second housing and located between the second housing and the cutter assembly and is a U-shaped plate structure, and the paper shredding passage is inserted through a bypass groove of the second reinforcement plate.

In an exemplary embodiment, two sides of the paper feeding end opening are each provided with a first sawtooth edge, a paper shredding portion of the cutter assembly extends into the paper shredding passage via a notch portion of the first sawtooth edge, and first sawtooth edges on the two sides of the paper feeding end opening are staggered; and/or two sides of the paper outfeeding end opening are each provided with a second sawtooth edge, the paper shredding portion of the cutter assembly extends into the paper shredding passage via a notch portion of the second sawtooth edge, and second sawtooth edges on the two sides of the paper feeding end opening are staggered.

In an exemplary embodiment, a side of the first sawtooth edge facing away from the paper shredding passage is provided with a first reverse round corner for providing an avoidance space for the cutter assembly; and/or a side of the second sawtooth edge facing away from the paper shredding passage is provided with a second reverse round corner for providing an avoidance space for the cutter assembly.

In an exemplary embodiment, the cutter assembly includes two knife rollers that are spaced apart side by side, each of the two knife rollers are provided with multiple paper shredding knives that are spaced apart along a length direction of each of the two knife rollers, multiple paper shredding knives on one of the two knife rollers and multiple paper shredding knives on another of the two knife rollers are staggered, the paper shredding passage is inserted between the two knife rollers, and the multiple paper shredding knives extend into the paper shredding passage.

In an exemplary embodiment, the multiple paper shredding knives on the two knife rollers (41) are each a cylindrical structure, and two ends of each of the multiple paper shredding knives are each provided with an annular unedged blade.

In an exemplary embodiment, the core further includes a stripping structure including two stripping blades, the two stripping blades are disposed at two ends of the two knife rollers facing the open notch in one-to-one correspondence, and cutting portions of the two stripping blades extend into the paper shredding passage.

In an exemplary embodiment, a first support plate, a second support plate and a third support plate are securely disposed inside the chassis, the first support plate is disposed at an end of the cutter assembly facing away from the open notch, the second support plate and the third support plate are disposed at an end of the cutter assembly facing the open notch, the first support plate is provided with a first mounting through hole and a second mounting through hole, the second support plate is provided with a third mounting through hole, the third support plate is provided with a fourth mounting through hole, one of the two knife rollers is rotatably inserted through the first mounting through hole and the third mounting through hole, and another of the two knife rollers is rotatably inserted through the second mounting through hole and the fourth mounting through hole.

In an exemplary embodiment, one of the two knife rollers is in transmission connection with the rotating drive member through a coupling, and the two knife rollers are in transmission connection with each other through a transmission gear assembly.

In an exemplary embodiment, the rotating drive member includes a micromotor whose rated voltage does not exceed 36 volts.

In an exemplary embodiment, an outside of the chassis is provided with a accommodating groove, and the portable paper shredder further includes an opener detachably connected to the accommodating groove.

In an exemplary embodiment, one of the opener and the chassis is provided with a magnetic attraction iron sheet, and another one of the opener and the chassis is provided with a magnet, and the opener is magnetically attracted to the chassis through the magnetic attraction iron sheet and the magnet.

In an exemplary embodiment, a sidewall of the accommodating groove is provided with a limiting boss for limiting a mounting position of the opener inside the accommodating groove.

The present disclosure has the beneficial effects below.

The chassis of the portable paper shredder according to the present disclosure is provided with the paper shredding passage. The side of the paper shredding passage extends outwards and forms the open notch on the sidewall of the chassis. When the sheet of paper is shredded, a portion of the sheet of paper passes through the open notch and enters the paper shredding passage from the paper feeding end opening while the other portion of the sheet of paper is located outside the chassis, and the traditional single paper shredding mode is changed to a segmented paper shredding mode so that the matching requirements between the size of the paper feeding end opening and the size of a sheet of paper can be lowered, and the portable paper shredder can match various sizes of paper, helping broaden the application scope of the portable paper shredder. Moreover, the open notch can enable the chassis to break through the size limits so that miniaturization can be achieved, and portability can be improved, thereby broadening the use scenarios of the paper shredder. In addition, there is no need to fold the sheet of paper for paper feeding so that the load and torque requirements of the rotating drive member can be lowered to select a rotating drive member having a lower power, thereby reducing the production cost and fulfilling the function of partial paper shredding.

REFERENCE LIST

DETAILED DESCRIPTION

To make solved technical problems, provided technical solutions and achieved technical effects of the present disclosure clearer, the technical solutions in the embodiments of the present disclosure are further described in detail below in conjunction with the drawings. Apparently, the embodiments described below are part, not all, of the embodiments of the present disclosure. Based on the embodiments of the present disclosure, all other embodiments obtained by those skilled in the art are within the scope of the present disclosure on the premise that no creative work is done.

As shown inFIGS.1to6, this embodiment provides a portable paper shredder. The portable paper shredder includes a chassis and a core disposed in the chassis. The chassis includes a rotating drive member5and a cutter assembly4that are in transmission connection. The chassis is provided with a paper shredding passage1. A paper shredding end of the cutter assembly4is located in the paper shredding passage1. The paper shredding passage1penetrates the chassis. Two ends of the paper shredding passage1are provided with a paper feeding end opening and a paper outfeeding end opening separately.

Further, as shown inFIGS.1and2, a side of the paper shredding passage1extends outwards and forms an open notch2on the sidewall of the chassis, and the open notch2directly communicates with the paper feeding end opening.

In an exemplary embodiment, the chassis of the portable paper shredder according to this embodiment is provided with the paper shredding passage1. The side of the paper shredding passage1extends outwards and forms the open notch2on the sidewall of the chassis. When a sheet of paper is shredded, a portion of the sheet of paper passes through the open notch2and enters the paper shredding passage1from the paper feeding end opening while the other portion of the sheet of paper is located outside the chassis, and the traditional single paper shredding mode is changed to a segmented paper shredding mode so that the matching requirements between the size of the paper feeding end opening and the size of a sheet of paper can be lowered, and the portable paper shredder can match various sizes of paper, helping broaden the application scope of the portable paper shredder. Moreover, the open notch2can enable the chassis to break through the size limits so that miniaturization can be achieved, and portability can be improved, thereby broadening the use scenarios of the portable paper shredder. In addition, there is no need to fold the sheet of paper for paper feeding so that the load and torque requirements of the rotating drive member5can be lowered to select a rotating drive member5having a lower power, thereby reducing the production cost and fulfilling the function of partial paper shredding.

Exemplarily, as shown inFIGS.1and2, along the penetration direction of the paper shredding direction1, the open notch2penetrates the sidewall of the chassis and directly communicates with the paper feeding end opening. That is, the open notch2directly communicates with the paper feeding end opening and the paper outfeeding end opening simultaneously so that the non-shredding portion of the sheet of paper can pass through the chassis more smoothly, the interference between the chassis and the sheet of paper can be prevented, and the feeding direction of the shredded paper can be prevented from being affected, thereby making the paper shredding region more accurate.

Exemplarily, as shown inFIG.3, the chassis includes a first housing31and a second housing32that are interconnected through fastening screws or inserted pins, and the first housing31and the second housing32are each a hollow structure and are enclosed to form a cavity structure to accommodate the core.

Exemplarily, as shown inFIGS.3,5and6, the paper shredding passage1penetrates the first housing31and the second housing32, the paper feeding end opening is disposed on the first housing31, and the paper outfeeding end opening is disposed on the second housing32. Correspondingly, the open notch2also penetrates the sidewall of the first housing31and the sidewall of the second housing32.

Exemplarily, as shown inFIGS.3and4, the cutter assembly4includes two knife rollers42that are spaced apart side by side. One of the two knife rollers41is in transmission connection with the rotating drive member5through a coupling7. The two knife rollers41are in transmission connection with each other through a transmission gear assembly and rotate in reverse. Each of the two knife rollers41is provided with multiple paper shredding knives42that are spaced apart along the length direction of the each of the two knife rollers41. Multiple paper shredding knives42on one of the two knife rollers41and multiple paper shredding knives42on another of the two knife rollers41are staggered. The paper shredding passage1is inserted between the two knife rollers41. The multiple paper shredding knives42extend into the paper shredding passage1. When the sheet of paper passes through the paper shredding passage1, for one thing, the multiple paper shredding knives42on one of the two knife rollers41and the multiple paper shredding knives42on another of the two knife rollers41rotate towards each other to drive the sheet of paper to be fed towards the paper outfeeding end opening, and for another thing, the multiple paper shredding knives42on one of the two knife rollers41and the multiple paper shredding knives42on another of the two knife rollers41cooperate with each other to shred the sheet of paper to fulfill the function of paper shredding.

Exemplarily, as shown inFIG.4, the multiple paper shredding knives42on one of the two knife rollers41and the multiple paper shredding knives42on another of the two knife rollers41are each a cylindrical structure, two ends of a paper shredding knife4are each provided with an annular unedged blade43, and a peripheral portion of the unedged blade43is provided with sawteeth. Compared with an existing one-side unedged cutting structure, the paper cutting efficiency of the paper shredding knives42in embodiments of the present application is higher, and when the cutter assembly4is assembled, there is no need to distinguish the directions of unedged blades43, saving time and effort and achieving a higher fault tolerance rate.

Exemplarily, as shown inFIG.4, the core further includes a stripping structure including two stripping blades44. The two stripping blades44are disposed at two ends of the two knife blades41facing the open notch2in one-to-one correspondence. Cutting portions of the two stripping blades44extend into the paper shredding passage1. The outer diameter of a stripping blade44is greater than or equal to the outer diameter of the paper shredding knife42. The arrangement of the stripping structure can split the region of the sheet of paper into a shredding region and a to-be-shredded region. The shredding region on the sheet of paper is located inside the paper shredding passage1and performs shredding through the cutter assembly4. The to-be-shredded region is located in the region through which the multiple paper shredding knives42do not pass. For one thing, the shredding region adapted to the length of the two knife rollers41by splitting can reduce the paper rolling problem caused by improper operations of a user, and for another thing, the load of the rotating drive member5can be reduced through the operation mode of multiple shreddings.

Exemplarily, as shown inFIG.4, a first support plate8, a second support plate9and a third support plate10are securely disposed inside the chassis. The first support plate8is disposed at an end of the cutter assembly4facing away from the open notch2. The second support plate9and the third support plate10are disposed at an end of the cutter assembly4facing the open notch2. The first support plate8is provided with a first mounting through hole81and a second mounting through hole82. The second support plate9is provided with a third mounting through hole83. The third support plate10is provided with a fourth mounting through hole. One of the two knife rollers41is rotatably inserted through the first mounting through hole81and the third mounting through hole83and the other one of the two knife rollers41is rotatably inserted through the second mounting through hole82and the fourth mounting through hole.

In an exemplary embodiment, as shown inFIGS.5and6, the inner side of the first housing31is provided with a first upper slot312, a second upper slot313and a third upper slot314, and the inner side of the second housing32is provided with a first lower slot322, a second lower slot323and a third lower slot324. Two ends of the first support plate8are inserted into the first upper slot312and the first lower slot322separately. Two ends of the second support plate9are inserted into the second upper slot313and the second lower slot323separately. Two ends of the third support plate10are inserted into the third upper slot314and the third lower slot324. When the first housing31and the second housing32are securely interconnected, the mounting positions of the first support plate8, the second support plate9and the third support plate10are correspondingly secured.

Exemplarily, the rotating drive member5includes a micromotor whose rated voltage does not exceed 36 volts, and the rotating drive member5is mounted inside the cavity structure of the chassis through a card slot.

Exemplarily, as shown inFIGS.1and3, the core further includes a switch13. The switch13is electrically connected to the rotating drive member5for controlling the start and stop of the rotating drive member5. The outside of the first housing31is movably provided with a knob14mechanically connected to the switch13. The user can switch the states of the switch13through the knob14to control the start and stop of the rotating drive member5.

Exemplarily, as shown inFIG.5, two sides of the paper feeding end opening are each provided with a first sawtooth edge311. A paper shredding portion of the cutter assembly4(that is, the multiple paper shredding knives42) extends into the paper shredding passage1via the notch portion of the first sawtooth edge311. First sawtooth edges311on one side of the paper feeding end opening and first sawtooth edges311on another side of the paper feeding end opening are staggered to match the staggered arrangement of the multiple paper shredding knives4on the two knife rollers41.

Exemplarily, as shown inFIG.5, a side of the first sawtooth edge311facing away from the paper shredding passage1is provided with a first reverse round corner3111for providing an avoidance space for the two knife rollers41on the cutter assembly4to improve the compactness of the structure and sealing property.

Exemplarily, as shown inFIG.6, two sides of the paper outfeeding end opening are each provided with a second sawtooth edge321. A paper shredding portion of the cutter assembly4(that is, the multiple paper shredding knives42) extends into the paper shredding passage1via the notch portion of the second sawtooth edge321. Second sawtooth edges321on one side of the paper outfeeding end opening and Second sawtooth edges321on another side of the paper outfeeding end opening are staggered to match the staggered arrangement of the multiple paper shredding knives4on the two knife rollers41. Further, the arrangement of the second sawtooth edge321is more conducive to the discharge guidance of the shredded paper pieces, and the second sawtooth edge321and the second housing32are an integrally formed structure, eliminating the need for additional assembly and reducing the production cost.

Exemplarily, as shown inFIG.6, a side of the second sawtooth edge321facing away from the paper shredding passage1is provided with a second reverse round corner3211for providing an avoidance space for the two knife rollers41on the cutter assembly4to improve the compactness of the structure and sealing property.

Exemplarily, as shown inFIG.3, a first reinforcement plate61is provided inside the cavity structure, is connected to the first housing31through screws and located between the first housing31and the cutter assembly4and is a U-shaped plate structure, so both the paper shredding passage1and the first sawtooth edge311are inserted through a first bypass groove611of the first reinforcement plate61, and an opening end of the first reinforcement plate61is opposite to the open notch2. The arrangement of the first reinforcement plate61can enhance the strength of the overall structure.

Exemplarily, as shown inFIG.3, a second reinforcement plate62is provided inside the cavity structure, is connected to the second housing32through screws and located between the second housing32and the cutter assembly4and is a U-shaped plate structure, so both the paper shredding passage1and the second sawtooth edge321are inserted through a second bypass groove621of the second reinforcement plate62, and an opening end of the second reinforcement plate62is opposite to the open notch2. The arrangement of the second reinforcement plate62can enhance the strength of the overall structure.

Exemplarily, both the first housing31and the second housing32are made of plastic, and the first reinforcement plate61and the second reinforcement plate62are made of metal material or plastic.

Exemplarily, as shown inFIGS.2and3, the outside of the chassis is provided with a accommodating groove325, and the portable paper shredder further includes an opener11detachably connected to the accommodating groove325. The arrangement and mounting of the opener11make full use of the outer space of the portable paper shredder and enrich the functionality of the portable paper shredder.

Exemplarily, one of the opener11and the chassis is provided with a magnetic attraction iron sheet and the other one of the opener11and the chassis is provided with a magnet12, and the opener11is magnetically attracted to the magnet12through the magnetic attraction iron sheet and the magnet. In this embodiment, the magnet12is mounted in a position of the inner side of the second housing32corresponding to the accommodating groove325, and the magnetic attraction iron sheet and the opener11are integrally formed.

Exemplarily, as shown inFIG.2, the sidewall of an end of the accommodating groove325is provided with a limiting boss326for limiting the mounting position of the opener11inside the accommodating groove326. The other end of the accommodating groove325is provided with a pullout groove327which allows the user to extend his hand into the pullout groove326to pull out the opener11.

It is to be noted that the preceding are only preferred embodiments of the present disclosure and technical principles used therein. It is to be understood by those skilled in the art that the present disclosure is not limited to the embodiments described herein. Those skilled in the art can make various apparent modifications, adaptations and substitutions without departing from the scope of the present disclosure. Therefore, while the present disclosure is described in detail through the preceding embodiments, the present disclosure is not limited to the preceding embodiments and may include more other equivalent embodiments without departing from the concept of the present disclosure. The scope of the present disclosure is determined by the scope of the appended claims.