BACKGROUND OF THE INVENTION
(a) Field of the Invention
The present invention relates to shredding technology and more particularly to a lottery ticket destroying device capable of cutting every individual lottery ticket into pieces for easy destruction.
(b) Description of the Prior Art
Conventional lottery ticket destruction devices, such as Taiwan Patent Application Nos. 85208584, 85204451, and 8520923, all disclose techniques for cutting and destroying lottery tickets. These designs simply use ratchets to cut lottery tickets into three slender curled paper strips but cannot cut off a long string of lottery tickets one by one. Therefore, after cutting, the curled paper strips still have a long curled shape with an increased volume, and the longer the long string of lottery tickets, the greater the degree of curl expansion. After the long string of lottery tickets is destroyed, the waste of the curled paper strips will automatically fall into a collection cylinder. However, the collection cylinder can only store a limited number of destroyed lottery tickets. Therefore, it is necessary to repeatedly clean up the collection cylinder. This will not only increase the lottery tickets destruction work, but also greatly reduce the effectiveness of the work of destroying the lottery tickets.
To this end, the inventor of the present invention has proposed an improved lottery destruction device, as shown in the Taiwan Patent Notice M554380, which uses a motor at one side of a machine body to rotate a transmission gear set, two guide rollers and two roller cutters, so that the user can insert a long string of lottery tickets from a top insertion slot through the two guide rollers, enabling the long string of lottery tickets to be sent by the two guide rollers between the two roller cutters below, and the long string of lottery tickets is then cut obliquely into pieces and discharged downward through a shear groove structure on the surface of each of the two roller cutters.
However, the two sides of the shear groove of each of the above two roller cutters are perpendicular to the surface of the respective roller cutter, so that after each lottery ticket is cut into pieces, it will not be smoothly discharged in the shear grooves. If too much waste pieces are accumulated in the shear grooves, the cutting operation will not be smooth. In addition, the two roller cutters are driven by two passive wheels of the transmission gear set, so that the cutting edges of the two roller cutters are meshed together, and the cutting edges that are meshed together cannot be relaxed a little regardless of the forward or reverse rotation. Therefore, if two overlapping lottery tickets are accidentally inserted in between the two guide rollers, the cutting edges of the two roller cutters will be stuck by the two overlapping lottery tickets, which must be eliminated through a complicated disassembly process. To this end, how to overcome the shortcomings of the above two roller cutters is the subject of the present invention.
SUMMARY OF THE INVENTION
The present invention has been accomplished under the circumstances in view. It is one object of the present invention to provide a lottery destroying device, which uses two roller cutters in the housing thereof for cutting lottery tickets into pieces, wherein each roller cutter has a plurality of helical shear grooves recessed into the roller cutter surface thereof. Each helical shear groove has a groove bottom surface, a vertical shear surface located on one side of the groove bottom surface and connected to the roller cutter surface and a chip-discharge surface located on an opposite side of the groove bottom surface and connected to the roller cutter surface. The chip-discharge surface can improve the discharge after the lottery ticket is cut into pieces. Thereby, the lottery ticket can be cut into pieces by the vertical shear surfaces of the helical cutter grooves of the two roller cutters, and the chip-discharge surfaces of the helical shear grooves can prevent the lottery ticket chips from being caught in the helical shear grooves and facilitate downward discharge of the lottery ticket chips. The chip-discharge surface may be a sloping or a curved surface.
Preferably, the shaft of one of the two roller cutters comprises a mounting portion protruding from one side of the housing and sequentially mounted with a second driven gear of the transmission gear set, an elastic member and a retaining member. The elastic member has one end thereof abutted against the second driven gear and an opposite end thereof abutted against the retaining member. The retaining member is coupled to the mounting portion of the shaft. Thereby, the retaining member is pushed by the elastic force of one end of the elastic member, so that the retaining member pushes the roller cutter, causing one vertical shear surface of the roller cutter to mesh with one vertical shear surface of the other roller cutter. Therefore, the meshed vertical shear surfaces of the two roller cutters have room for flexible activity, which can prevent the jamming caused by two lottery tickets being simultaneously drawn into the two roller cutters.
Other advantages and features of the present invention will be fully understood by reference to the following specification in junction with the accompanying drawings, in which like reference characters denote like components of the structure.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a schematic first side elevational view of a lottery ticket destroying device in accordance with the present invention.
FIG. 2 is a schematic second side elevational view of the lottery ticket destroying device in accordance with the present invention.
FIG. 3 illustrates an opened status of the lottery ticket destroying device of the present invention.
FIG. 4 is a schematic perspective view of the first side of the lottery ticket destroying device of the present invention.
FIG. 5 is an exploded view of the roller cutters of the lottery ticket destroying device of the present invention.
FIG. 6 is a schematic cross-sectional view of the right side of the lottery ticket destroying device of the present invention.
FIG. 7 is a schematic cross-sectional view of the roller cutters of the lottery ticket destroying device of the present invention.
FIG. 8 is a schematic elevational view of the lottery ticket destroying device of the present invention with the elastic member thereof shown in exploded view.
FIG. 9 is an elevational view of a part of the present invention, showing the structure of the two roller cutters of the lottery ticket destroying device.
FIG. 10 is an exploded view of the elastic member and the associated roller cutter of the lottery ticket destroying device of the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Referring to FIGS. 1 and 2, a lottery ticket destroying device of the present invention is a shredding device for installing a lottery destroying machine capable of cutting lottery tickets into pieces for destruction, comprising a housing 10, two roller cutters 20,20′ mounted in the housing 10 (see FIG. 4) and a transmission gear set 30 mounted on one side of the housing 10. FIGS. 3 and 4 further show that the transmission gear set 30 comprises a first driven gear 31 and a second driven gear 32 respectively mounted on the shafts 23 of the roller cutters 20′,20 at one end.
As shown in FIG. 1 and FIG. 3, the housing 10 preferably comprises an upper housing member 11 and a lower housing member 12, and an pivotal joint is implemented on one end of the upper housing member 11 and the lower housing member 12 so that the other end of the upper housing member 11 can be easily opened from the lower housing member 12. The upper housing member 11 is provided with an insertion slot 13 at a top side thereof for inserting a string of lottery tickets 100. A motor 14 is mounted on one side of the lower housing member 12 for driving a drive gear 15 (as shown in FIG. 2). The drive gear 15 drives the transmission gear set 30, causing the transmission gear set 30 to drive two guide rollers 16,16′ and the two roller cutters 20,20′ in the housing 10 (as shown in FIG. 4 and FIG. 5). Thus, the two guide rollers 16,16′ are able to roll the inserted string of lottery tickets 100 between the two roller cutters 20,20′, enabling the inserted string of lottery tickets 100 to be cut into pieces by the two roller cutters 20,20′.
Referring to FIG. 5 and FIG. 6, the center of each of the two roller cutters 20,20′ is respectively disposed with a shaft 23 protruding from the two ends of the roller cutters 20,20′. Both ends of the shaft 23 of each of the two roller cutters 20,20′ are rotatably disposed in the lower housing member 12 of the housing 10. Through the transmission gear set 30, the two roller cutters 20,20′ are rotated synchronously. In particular, as shown in FIG. 7, FIG. 9 and FIG. 10, the surface 22 of the two roller cutters 20,20′ of the present invention respectively has a plurality of helical shear grooves 21 recessed into the surface 22 of the roller cutters 20,20′. Each helical shear groove 21 comprises a groove bottom surface 211, a vertical shear surface 212 located on one side of the groove bottom surface 211 and connected to the roller cutter surface 22, and a chip-discharge sloping surface 213 located on an opposite side of the groove bottom surface 211 and connected to the roller cutter surface 22. The chip-discharge sloping surface 213 can also be replaced by a chip-discharge curved surface. Thereby, the two roller cutters 20,20′ are rolled by the transmission gear set 30, so that the inserted string of lottery tickets 100 can be cut by the matching vertical shear surfaces 212 of the two roller cutters 20,20′, and use the chip-discharge sloping surfaces 213 to help discharge the chips of the string of lottery tickets downwards, while preventing the lottery chips from being stuck in the helical shear grooves 21.
Referring to FIG. 8, FIG. 9 and FIG. 10, one end of the shaft 23 of one of the two roller cutters (20 as illustrated) of the present invention is provided with a mounting portion 231. The mounting portion 231 extends to protrude from one side of the housing 10, and is located on the same side as the transmission gear set 30, and a second driven gear 32 of the transmission gear set 30, an elastic member 40 and a retaining member 50 are sequentially mounted on one end of the shaft 23. The elastic member 40 has one end thereof abutted against the second driven gear 32 and an opposite end thereof abutted against the retaining member 50. The retaining member 50 is coupled to the mounting portion 231 of the shaft 23. Thereby, the retaining member 50 is pushed by the elastic force of one end of the elastic member 40, so that the retaining member 50 pushes the roller cutter 20, causing one vertical shear surface 212 of the roller cutter 20 to mesh with one vertical shear surface 212 of the other roller cutter 20′. Therefore, the meshed vertical shear surfaces 212 of the two roller cutters 20,20′ have room for flexible activity, which can prevent the jamming caused by two lottery tickets being simultaneously drawn into the two roller cutters.
Referring to FIGS. 8-10, the outer side of the second driven gear 32 is provided with a stopping portion 321, and the stopping portion 321 can be a screw attached to the second driven gear 32. The retaining member 50 is a disc 51 made of plastic. The inner side of the disc 51 has a latching portion 52. The latching portion 52 can be embodied as a recess recessed into the disc 51. The elastic member 40 is preferably implemented as a torsion spring 41. The torsion spring 41 has one end thereof abutted against the stopping portion 321 of the second driven gear 32, and an opposite end thereof abutted against the latching portion 52. In addition, a fixing component 60 can be attached to the end surface of the mounting portion 231. The fixing component 60 can be a screw, and the fixing component 60 can be pressed against an outer side of the retaining member 50 to prevent the retaining member 50 from coming off the mounting portion 231.
Although a particular embodiment of the invention has been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
Patent Application
20200122157
