Easily removable and maintainable cutting device

Abstract

A cutting device comprising: a holder (1) in which a receiving space (10) with a front opening is provided, wherein two side plates (2) are arranged at the two ends of the receiving space (10), and a first rod body (11) is arranged on the upper side of each of the two side plates (2), wherein the two first rod bodies (11) are provided with inwardly directed and mutually corresponding first projections (111) so that a paper towel roll (100) can be attached to the two first projections (111), wherein the two side plates (2) are each provided with a first shaft hole (21), and a closed circular guide recess (22) is provided on the inner wall surface of the two side plates (2) on the circumference of the first shaft hole (21), whereby the first shaft holes (21) and the guide recesses (22) lie within the receiving space (10),wherein a first positioning section (24) and a second positioning section (25), which correspond to one another, are provided on the respective inner wall surface of the two side plates (2), wherein the first positioning section (24) and the second positioning section (25) are located outside the receiving space (10) and each adjacent to the outer edge of the two side plates (2); a first rotary shaft (3) arranged in the receiving space (10) of the holder (1), wherein a first axis section (31) protrudes from the two ends of the first rotary shaft (3), wherein the two first axis sections (31) are inserted through the two first shaft holes (21) of the side plates (2), whereby the first rotary shaft (3) can be rotated in the receiving space (10) of the holder (1), wherein the first rotary shaft (3) is provided with a recess (32) in which a movable knife assembly (4) is arranged,wherein the two ends of the knife assembly (4) are each provided with a protruding shaft (44) located within a respective guide recess (22) of a side plate (2), whereby a respective protruding shaft (44) of the knife assembly (4) can each slide in a closed circular guide recess (22) of a side plate (2), a cover plate (5) which is movably connected to the two side plates (2) and serves to cover the first rotary shaft (3), wherein a third positioning section (51) and a fourth positioning section (52) are respectively provided at the two ends of the cover plate (5), wherein the third positioning section (51) is movably connected to the first positioning section (24) of the side plate (2) and the fourth positioning section (52) is movably connected to the second positioning section (25) of the side plate (2), wherein the paper of the paper roll (100), when pulled,comes into contact with the first rotary shaft (3) and the first rotary shaft (3) is driven to rotate, and the respective projecting shaft (44) of the knife assembly (4) is driven by the first rotary shaft (3) to slide in the respective guide recess (22), whereby the knife assembly (4) can be moved back and forth in the recess (32) of the first rotary shaft (3) and protrudes from the recess (32), whereby the paper of the paper roll (100) can be cut by the knife assembly (4), wherein the cutting device further comprises a push rod (8), wherein a second arm (81) is arranged at each of the two ends of the push rod (8), and the respective second arm (81) is provided with a third shaft hole (811), wherein one of the second arms (81) is provided with a sector gear (812), wherein a first shaft rod (26) is arranged on the outer wall surface of each of the two side plates (2),wherein the third shaft hole (811) of the respective second arm (81) is combined with the respective first shaft rod (26) of the two side plates (2), wherein the first axis portion (31) protrudes from the side plate (2) at one end of the first rotary shaft (3) and is surrounded by a first gear (35), wherein the sector gear (812) of the second arm (81) is in engagement with the first gear (35) of the first rotary shaft (3).

Description

Technical field of the invention

[0001] The present invention relates to an easily detachable and maintainable cutting device, and more particularly to a cutting device in which, at the same time, the knife assembly can be reciprocated by the pulling operation of the paper of a paper roll, thereby cutting the paper of the paper roll to ensure that the paper of the paper roll can be cut in a state without power supply. State of the art

[0002] To allow users to dry their hands after washing, paper towel dispensers are typically provided near the sinks in public restrooms. Conventional paper towel dispensers primarily consist of a roll housed within a housing. A paper roll is mounted on the roll, with a fixed blade seat located at an opening position on the housing base, as disclosed in Taiwanese utility model TW M483056 U.

[0003] When the user grasps the roll paper, the roll paper protruding from the bottom of the body is first pulled downward and then sideways, which causes the roll paper to be cut by the knife seat of the body, so that the user can use the paper towel to wipe off the remaining water from his hands.

[0004] However, conventional paper towel supply devices require the user to actively pull the roll paper to cut it using the cutter seat, resulting in irregularly cut edges. Furthermore, if the user (such as a child) is unable to pull the roll paper with sufficient force, the roll paper cannot be cut properly, resulting in the pulled-out paper towel being too long. This not only results in wasteful roll paper but also in the possibility of the overly long paper towel coming into contact with the sink or the floor, resulting in contamination.

[0005] US 2010 / 0 102 101 A1 discloses a cutting device for a paper dispenser. It essentially comprises a roller with a knife bar that can be moved along a guide during its rotation to cut a paper web drawn from a roll into sections. The roller is driven by a battery-powered motor after a user has pulled a section of the paper web.

[0006] US 4 441 392 A also shows a paper dispenser with a cutting device of the type mentioned above. Object of the invention

[0007] In view of the above disadvantages, the present invention provides an easily removable and maintainable cutting device comprising a bracket, a first rotary shaft and a cover plate.A receiving space with a front opening is provided in the holder, wherein two corresponding side plates are connected to the two ends of the receiving space, wherein the first rotary shaft is arranged between the two side plates and within the receiving space so that the first rotary shaft can be rotated within the receiving space, wherein the cover plate is movably connected to the two side plates of the holder and is located opposite the front opening of the receiving space, wherein the cover plate serves to cover the first rotary shaft, wherein a slidable knife assembly is arranged in the recess of the first rotary shaft, wherein a projecting shaft provided at both ends of the knife assembly can each slide into a closed circular guide recess of a side plate.

[0008] In this way, the roll paper can first be wound onto the first rotating shaft and then protrude from the holder, wherein the roll paper, when pulled, comes into contact with the first rotating shaft and the first rotating shaft is driven to rotate, then the respective protruding shaft of the knife assembly is driven by the first rotating shaft to slide in the respective guide recess provided in the two side plates, whereby the knife assembly can be moved back and forth in the recess of the first rotating shaft (for example, by a telescopic movement in the forward and backward direction) and protrudes from the recess, whereby the paper of the paper roll can be cut by the knife assembly to ensure that the paper of the paper roll can be cut in a state without power supply. At the same time, the cover plate is movably connected to the two side plates of the holder.When a paper jam occurs in the roll paper, the cover plate can be quickly removed and the paper jam area can be removed to facilitate paper jam maintenance.

[0009] This object is achieved by the invention defined in claim 1. Advantageous developments of the invention are defined in the subclaims. Brief description of the drawings Fig. 1 shows an exploded view of an embodiment of the cutting device according to the invention; Fig. Figure 2 shows a perspective view of the composition of the embodiment of the cutting device according to the invention from an angle; Fig. 3 shows a perspective view of the composition of the embodiment of the cutting device according to the invention from a different angle; Fig. 4 shows a schematic view of a side plate of the cutting device according to the invention; Fig. 5 shows an exploded view of the first rotary shaft of the cutting device according to the invention; Fig. 6 shows a perspective view, not according to the invention, of the assembly of another embodiment of the cutting device according to the invention from an angle; Fig. 7 shows a schematic view of a first example of operation of the knife arrangement of the cutting device according to the invention; Fig. 8 shows a schematic view of a second example of operation of the knife arrangement of the cutting device according to the invention; Fig. 9 shows a schematic view of a third example of operation of the knife arrangement of the cutting device according to the invention; Fig. 10 shows a schematic view of an application example of the cutting device according to the invention; Fig. Fig. 11 is a schematic view showing a state of the cutting device according to the invention in which the paper needs to be replenished; Fig. 12 shows a schematic view of a paper jam occurring in the cutting device according to the invention. Detailed description of the preferred embodiments

[0010] See the Fig. 1 to 5. The present invention discloses an easily removable and maintainable cutting device comprising a bracket 1, a first rotary shaft 3, a cover plate 5, a second rotary shaft 6 and a third rotary shaft 7.

[0011] In the holder 1, a receiving space 10 with a front opening is provided, wherein two corresponding side plates 2 are connected to the two ends of the receiving space 10, wherein on the upper side of the two side plates 2 a first rod body 11 is arranged, wherein the two first rod bodies 11 are provided with the respective inwardly directed and mutually corresponding first projections 111, so that a predetermined paper roll 100 can be attached to the two first projections 111 (cf. Fig. 10). The two side plates 2 are each provided with a first shaft hole 21, wherein a closed circular guide recess 22 is provided on the inner wall surface of the two side plates 2 corresponding to the circumference of the first shaft hole 21, whereby the first shaft holes 21 and the guide recesses 22 are located within the receiving space 10, wherein the respective guide recesses 22 are provided with a depressed portion 221. Furthermore, a first positioning portion 24 and a second positioning portion 25, which correspond to each other, are provided on the respective inner wall surface of the two side plates 2, wherein the first positioning portion 24 and the second positioning portion 25 are located outside the receiving space 10 and each adjacent to the outer edge of the two side plates 2.Furthermore, a second shaft hole 23 is provided above the second positioning portion 25 in each of the two side plates 2, and a first shaft rod 26 is arranged on the outer wall surface of the two side plates 2, and a second shaft rod 27 is arranged on the outer wall surface of one of the two side plates 2.Furthermore, a second rod body 12 and a control module 13 are mounted on the bracket 1, wherein a contact portion 121 extends laterally from one end of the second rod body 12, the other end being provided with a first shaft portion 122, the contact portion 121 being located at a rearward position with respect to the first rod body 11, the first shaft portion 122 being rotatably connected to the outer wall surface of one of the two side plates 2, the first shaft portion 122 being provided with a return spring, whereby the contact portion 121 of the second rod body 12 can be moved toward the first rod body 11. Furthermore, a press-contact portion 123 protrudes from the end of the first shaft portion 122 of the second rod body 12.The control module 13 is arranged at the bracket 1 and comprises a control board 131 and a push switch 132, wherein the control board 131 is electrically connected to at least one light-emitting element 133 (such as an LED), a speaker, and a battery unit 135, wherein the push switch 132 is electrically connected to the control board 131, wherein the push switch 132 is arranged adjacent to one side of the press contact portion 123 of the second rod body 12, whereby the press contact portion 123 of the second rod body 12 can be brought into contact with the push switch 132 by pressing, thus turning on the push switch.

[0012] The first rotary shaft 3 is arranged in the receiving space 10 of the holder 1, wherein a first axis section 31 protrudes from each of the two ends of the first rotary shaft 3, wherein the two opposite first axis sections 31 are inserted through the two first shaft holes 21 of the two side plates 2, whereby the first rotary shaft 3 can be rotated in the receiving space 10 of the holder 1, wherein the first rotary shaft 3 is provided with a recess 32, wherein a movable knife assembly 4 is arranged in the recess 32, wherein the knife assembly 4 is provided with a base 41, wherein one side of the base 41 is connected to a blade 42, wherein a first arm 43 is arranged at each of the two ends of the base 41, wherein the respective first arm 43 is provided with a projecting shaft 44 and a second projection 45,The respective protruding shaft 44 is located outside the first rotary shaft 3 and within the respective guide recess 22 of the side plate 2. Furthermore, a third positioning portion 33 and a fixing element 34 are provided on the periphery of the recess 32 at the two ends of the first rotary shaft 3. The blade assembly 4 is arranged within the recess 32 of the first rotary shaft 3. The second projection 45 of the blade assembly 4 is connected to the third positioning portion 33, and the blade assembly 4 is then held by the fixing element 34 to prevent it from falling out, whereby the blade assembly 4 can be moved back and forth within the recess 32 of the first rotary shaft 3 (for example, by a telescopic movement in the forward and backward direction) and protrudes from the recess 32. The first axle portion 31 at one end of the first rotary shaft 3 protrudes from the side plate 2 and is encompassed by a first gear 35.wherein the first gear 35 is located on one side of the second shaft rod 27 of the side plate 2; wherein the first axis portion 31 at the other end of the first rotary shaft 3 protrudes from the side plate 2 and is encompassed by a rotary part 36, wherein a first elastic element 37 is connected to an eccentric point of the rotary part 36, wherein the other end of the first elastic element 37 can be fastened to the side plate 2 (cf., Fig. 3). By pulling the first elastic element 37, the first rotary shaft 3 can have a return mechanism during rotation.

[0013] The cover plate 5 is movably connected to the two side plates 2 of the holder 1 and is located at the front opening of the receiving space 10. The cover plate 5 serves to cover the first rotary shaft 3. A third positioning portion 51 and a fourth positioning portion 52 are provided at the two ends of the cover plate 5, respectively. The third positioning portion 51 of the cover plate 5 is movably connected to the first positioning portion 24 of the side plate 2, and the fourth positioning portion 52 of the cover plate 5 is movably connected to the second positioning portion 25 of the side plate 2, so that the cover plate 5 can be quickly combined with or quickly removed from the two side plates 2 of the holder 1. Furthermore, a third rotary shaft 7 is attached to a lower portion of the cover plate 5 directed toward the receiving space 10 of the holder 1.

[0014] The second axis portions 61 are respectively provided at the two ends of the second rotary shaft 6, wherein the two second axis portions 61 are inserted through the respective second shaft holes 23 of the two side plates 2, whereby the second rotary shaft 6 is located above the second positioning portion 25.

[0015] According to the present embodiment, the paper of the paper roll 100 is wound sequentially onto the second rotary shaft 6, the first rotary shaft 3, and the third rotary shaft 7, and then protrudes from the underside of the cover plate 5, so that the paper of the paper roll 100 can be wound onto the surface of the first rotary shaft 7. When the user grasps the paper of the paper roll 100, the paper of the paper roll 100 comes into frictional contact with the first rotary shaft 3 through the pulling action, whereby the first rotary shaft 3 is simultaneously driven to rotate. Furthermore, with the rotation of the first rotary shaft 3, the respective projecting shaft 44 of the knife assembly 4 can be driven by the first rotary shaft 3 to slide in the respective guide recess 22 provided in the two side plates 2 (see the Fig. 7, Fig. 8 and Fig. 9). When the respective projecting shaft 44 of the knife assembly 4 is located in the recessed portion 221 of the respective guide recess 22, the blade 42 of the knife assembly 4 can be pushed out of the recess 32 of the first rotary shaft 3, whereby the blade 42 of the knife assembly 4 actively cuts the paper of the paper roll 100 to ensure that a predetermined length of the paper of the paper roll can be cut in a state without power supply. Furthermore, because the cover plate 5 is movably connected to the two side plates 2 of the holder 1, when a paper jam occurs in the paper of the paper roll 100, the cover plate 5 can be quickly removed and the paper jam area removed to facilitate maintenance work in the event of paper jams (as shown in Fig. 12 can be seen).

[0016] See the Fig. 3, Fig. 10 and Fig. 11. When there is paper in the paper roll 100, the contact portion 121 of the second rod body 12 is pressed by the paper roll 100. In this case, the push switch 132 is not pressed by the press contact portion 123 of the second rod body 12. When there is no paper in the paper roll 100, the contact portion 121 of the second rod body 12 is not pressed by the paper roll 100, whereby the contact portion 121 of the second rod body 12 is moved toward the first rod body 11. In this case, the push switch 132 is pressed by the press contact portion 123 of the second rod body 12, and this turns on the push switch, so that the light-emitting element 133 electrically connected to the control board 131 generates light (such asFlashing) and the speaker arranged on the control board 131 emits a sound to ensure the technical effect of automatically detecting the amount of paper in the paper roll 100. The light-emitting element 133 may be arranged at the front end of the side plates 2, thereby clearly informing the user of the lighting state of the light-emitting element 133 (as shown in Fig. 11).

[0017] Referring to the Fig. 1 and Fig. 2, the invention further comprises a push rod 8, wherein a second arm 81 is arranged at each of the two ends of the push rod 8, wherein the respective second arm 81 is provided with a third shaft hole 811, wherein the third shaft hole 811 of the respective second arm 81 is combined with the respective first shaft rod 26 of the two side plates 2, whereby the push rod 8 is fastened outside the two side plates 2 of the bracket 1. Furthermore, one of the second arms 81 is provided with a sector gear 812, wherein the sector gear 812 of the second arm 81 engages with the first gear 35 of the first rotary shaft 3. Furthermore, the second arms 81 are each combined with a second elastic element 82, wherein the other end of each second elastic element 82 is fastened to a side plate 2, whereby the push rod 8 can perform an elastic return function.When the user presses the push rod 8, the first gear 3 and the first rotating shaft 3 are driven to rotate by the sector gear 812 of the push rod 8 to ensure that the paper of the paper roll 100 performs the functions of automatic feeding and automatic cutting.

[0018] Referring to Fig.6 shows an embodiment not according to the invention, which further includes a rotary knob 9. A second gear 91 is arranged in the rotary knob 9, wherein the second gear 91 can be mounted on the second shaft rod 27 of one of the side plates 2, wherein the second gear 91 of the rotary knob 9 engages with the first gear 35 of the first rotary shaft 3. When the user rotates the rotary knob 9, the first gear 3 and the first rotary shaft 3 are driven to rotate by the second gear 91 of the rotary knob 9 to ensure that the paper of the paper roll 100 fulfills the functions of automatic feeding and automatic cutting.

[0019] Furthermore, a power generation module 134 is arranged on the control module 13. The power generation module 134 generates power by driving the first rotating shaft 3. When the user grasps the paper from the paper roll 100, the paper from the paper roll 100 comes into frictional contact with the first rotating shaft 3 due to the pulling action, which simultaneously drives the first rotating shaft 3 to rotate. Upon rotation of the first rotating shaft 3, the power generation module 134 can be driven to generate power. The power generation module 134 transmits power to the control board 131, whereby the light-emitting element 133 arranged on the control board 131 generates light. Furthermore, a voice chip is arranged on the control board 131. When the power generation module 134 transmits power to the control board 131, the audio signal preset on the voice chip is reproduced via the loudspeaker arranged on the control board 131.Furthermore, the battery unit 135 arranged in the control module 13 can be a removable battery. The battery unit 135 supplies power to the control board 131, allowing the light-emitting element 133 to generate light and the speaker to reproduce the audio signal preset in the voice chip.

Claims

[1] Cutting device comprising: a holder (1) in which a receiving space (10) with a front opening is provided, wherein two side plates (2) are arranged at the two ends of the receiving space (10) and a first rod body (11) is arranged on the upper side of each of the two side plates (2), wherein the two first rod bodies (11) are provided with inwardly directed and mutually corresponding first projections (111) so that a paper towel roll (100) can be attached to the two first projections (111), wherein the two side plates (2) are each provided with a first shaft hole (21), and on the inner wall surface of the two side plates (2) on the circumference of the first shaft hole (21) a closed circular guide recess (22) is provided, whereby the first shaft holes (21) and the guide recesses (22) lie within the receiving space (10), wherein a first positioning section (24) and a second positioning section (25) which correspond to one another are provided on the respective inner wall surface of the two side plates (2), wherein the first positioning section (24) and the second positioning section (25) lie outside the receiving space (10) and each adjacent to the outer edge of the two side plates (2); a first rotary shaft (3) arranged in the receiving space (10) of the holder (1), wherein a first axis section (31) protrudes from each of the two ends of the first rotary shaft (3), wherein the two first axis sections (31) are inserted through the two first shaft holes (21) of the side plates (2), whereby the first rotary shaft (3) can be rotated in the receiving space (10) of the holder (1), wherein the first rotary shaft (3) is provided with a recess (32) in which a movable knife assembly (4) is arranged, wherein the two ends of the knife assembly (4) are each provided with a projecting shaft (44) located within a respective guide recess (22) of a side plate (2), whereby a respective projecting shaft (44) of the knife assembly (4) can each slide in a closed circular guide recess (22) of a side plate (2), a cover plate (5) which is movably connected to the two side plates (2) and serves to cover the first rotary shaft (3), wherein a third positioning section (51) and a fourth positioning section (52) are provided at the two ends of the cover plate (5), wherein the third positioning section (51) is movably connected to the first positioning section (24) of the side plate (2) and the fourth positioning section (52) is movably connected to the second positioning section (25) of the side plate (2), wherein the paper of the paper roll (100), when pulled, comes into contact with the first rotary shaft (3) and the first rotary shaft (3) is driven to rotate, and the respective projecting shaft (44) of the knife assembly (4) is driven by the first rotary shaft (3) to slide in the respective guide recess (22), whereby the knife assembly (4) can be moved back and forth in the recess (32) of the first rotary shaft (3) and protrudes from the recess (32), with which the paper of the paper roll (100) can be cut by the knife arrangement (4), wherein the cutting device further comprises a push rod (8), wherein a second arm (81) is arranged at each of the two ends of the push rod (8), and the respective second arm (81) is provided with a third shaft hole (811), wherein one of the second arms (81) is provided with a sector gear (812), wherein a first shaft rod (26) is arranged on the outer wall surface of each of the two side plates (2), wherein the third shaft hole (811) of the respective second arm (81) is combined with the respective first shaft rod (26) of the two side plates (2), wherein the first axis portion (31) protrudes from the side plate (2) at one end of the first rotary shaft (3) and is surrounded by a first gear (35), wherein the sector gear (812) of the second arm (81) is in engagement with the first gear (35) of the first rotary shaft (3). [2] The cutting device according to claim 1, further comprising a second rod body (12) and a control module (13) mounted on the bracket (1), a contact portion (121) extending laterally from one end of the second rod body (12), the other end being provided with a first shaft portion (122), the contact portion (121) being located at a rear position with respect to the first rod body (11), the first shaft portion (122) being rotatably connected to the outer wall surface of one of the two side plates (2), the first shaft portion (122) being provided with a return spring, whereby the contact portion (121) of the second rod body (12) can be moved toward the first rod body (11), a press-contact portion (123) protruding from the end of the first shaft portion (122) of the second rod body (12);wherein the control module (13) is arranged at the holder (1), wherein the control module (13) comprises a control board (131) and a push switch (132), wherein the push switch (132) is electrically connected to the control board (131), wherein the push switch (132) is arranged adjacent to one side of the press contact portion (123) of the second rod body (12), whereby the press contact portion (123) of the second rod body (12) can be brought into contact with the push switch (132) by pressing, whereby the push switch (132) is turned on.; [3] Cutting device according to claim 2, wherein the control board (131) is provided with at least one light-emitting element (133), a loudspeaker and a battery unit (135). [4] Cutting device according to claim 1, wherein the respective guide recesses (22) are provided with a recessed portion (221), wherein the knife assembly (4) can be pushed out of the recess (32) of the first rotary shaft (3) when the respective projecting shaft (44) of the knife assembly (4) is located in the recessed portion (221). [5] Cutting device according to claim 4, wherein the knife assembly (4) is provided with a base (41), one side of the base (41) being connected to a blade (42), a first arm (43) being arranged at each of the two ends of the base (41), each of the first arms (43) being provided with a projecting shaft (44) and a second projection (45), a third positioning portion (33) and a fixing element (34) being provided respectively on the periphery of the recess (32) at the two ends of the first rotary shaft (3), the second projection (45) of the knife assembly (4) being connected to the third positioning portion (33), the fixing element (34) serving to hold the knife assembly (4). [6] Cutting device according to claim 1, wherein the second arms (81) are each combined with a second elastic member (82), the other end of each second elastic member (82) being fixed to a side plate (2), whereby the push rod (8) has an elastic. [7] Cutting device according to claim 1, further comprising a second rotary shaft (6) and a third rotary shaft (7), wherein second axis portions (61) are provided respectively at the two ends of the second rotary shaft (6), wherein a second shaft hole (23) is provided above the second positioning portion (25) in each of the two side plates (2), wherein the two second axis portions (61) are inserted through the respective second shaft holes (23), wherein the third rotary shaft (7) is fastened to a lower point of the cover plate (5) directed towards the receiving space (10). [8] Cutting device according to claim 3, further comprising a power generation module (134) arranged at the position of the first axis portion of the first rotary shaft (3), the power generation module (134) being electrically connected to the control board (131), the power generation module (134) generating power and transmitting it to the control board (131), further comprising a voice chip arranged on the control board (131).

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