Abstract:
An automatic paper cutting device, includes: a paper reel frame for supporting the paper; and a core unit, wherein the core unit comprises a paper rolling shaft which a head portion of the paper reel rolls around, and the paper rolling shaft is connected to a cutting device. The present invention simplifies the internal structure for realizing the functional requirement that the structure are simpler and the accessories are fewer, the structure of the automatic paper cutting device is simpler, the automatic paper cutting device works more stable, the paper is outputted more smoothly, and the paper of different thickness and quality is capable of being cut automatically.

Description:
BACKGROUND OF THE PRESENT INVENTION 
     1. Field of Invention 
     The present invention relates to a field of daily necessity, and more particularly to a paper cutting device. 
     2. Description of Related Arts 
     Paper is ordinarily installed on the paper reel frame at the traditional pubs, hotels, or airports. It is inconvenient and unsanitary that the paper is rolled and torn for a certain length manually when using. There are a number of automatic paper cutting devices with different styles and different internal structures on the market nowadays, which are convenient and sanitary, but the internal structures are complicated and the accessories are numerous. Although the functional requirement of the automatic paper cutting devices is simple, which is only two actions of outputting the paper of the same length and cutting the paper, it is likely to result the shortcoming of complicated structure to realize this function requirement. 
     SUMMARY OF THE PRESENT INVENTION 
     An object of the present invention is to provide a paper cutting device to solve the above technical problem. 
     Accordingly, in order to accomplish the above object, the present invention provides an automatic paper cutting device, comprising a paper reel frame for supporting the paper reel and a core unit, wherein the core unit comprises a paper rolling shaft which a head portion of the paper reel rolls around, and the paper rolling shaft is connected to a cutting device. 
     The head portion of the paper reel rolls around the paper rolling shaft, when a user pulls out the head portion, the paper rolling shaft rolls and the paper reel is driven to roll, when the paper of a certain length is outputted, the paper cutting device is driven to implement cutting. 
     The core unit comprises a left core unit frame and a right core unit frame; a connecting shaft is provided at the center of the paper rolling shaft, the paper rolling shaft is installed on the left core unit frame and the right core unit frame via the connecting shaft. 
     A paper inputting guiding roller is provided between the paper rolling shaft and the paper reel frame, the head portion of the paper reel rolls on the paper rolling shaft. A first left fixed sleeve and a first right fixed sleeve are provided at the two ends of the paper inputting guiding roller. The paper inputting guiding roller is provided on the left core unit frame and the right core unit frame via the first left fixed sleeve and the first right fixed sleeve. 
     A first extension spring is connected with the first left fixed sleeve, a second extension spring is connected with the first right fixed sleeve, the first left fixed sleeve and the first right fixed sleeve are respectively provided on the left core unit frame and the right core unit frame via the first extension spring and the second extension spring. 
     The core unit further comprises a paper outputting guiding roller, wherein a second left fixed sleeve and a second right fixed sleeve are provided at the two ends of the paper outputting guiding roller. The paper outputting guiding roller is provided on the left core unit frame and the right core unit frame via the second left fixed sleeve and the second right fixed sleeve. The head portion of the paper reel rolls on the paper outputting guiding roller through the paper rolling shaft. The paper outputting guiding roller is provided at a first side of the paper rolling shaft, the paper inputting guiding roller is provided at a second side of the paper rolling shaft. 
     The paper rolling shaft comprises two detachable connecting parts, the two parts of the paper rolling shaft are connected with each other by connectors, the connectors comprise crews. The two parts of the paper rolling shaft are connected with each other via the crews or other fastening mechanisms. 
     The paper rolling shaft has a long strip groove which the cutting device is provided in. The cutting devices comprise a paper cutter frame, a paper cutter movably connected with the paper cutter frame. The paper cutter frame comprises a left paper cutter frame and a right paper cutter frame, the left paper cutter frame and the right paper cutter frame are respectively connected with guiding pins, the left paper cutter frame and the right paper cutter frame are fixedly connected with the paper rolling shaft via the guiding pins. The paper cutter frame is connected with a crank mechanism, the paper cutter frame is connected with the connecting shaft to implement rolling synchronously via the crank mechanism. Preferably, the right paper cutter frame is connected with the crank mechanism. When the connecting shaft rolls, the paper cutter frame keeps rolling synchronously via the crank mechanism, when the crank mechanism rolls for a stroke, the paper cutter implements cutting paper. When designing, the dimension parameters of the crank mechanism are determined according to the length of the paper outputted each time for insuring that the paper cutter is capable of protruding automatically at a proper position when the connecting shaft rolls, so as to implement outputting the paper of the same length. 
     The cutter is movably connected with the paper cutter frame, at least 12 cutter teeth are provided on the paper cutter. The cutter teeth bend for a pre-set angle. At a first runtime state, the cutter teeth of the paper cutter do not protrude and do not cut down the paper, at a second runtime state, the crank mechanism rolls for a stroke, the cutter teeth bend to one direction in such a manner that when the cutter stretches out, the cutter teeth upturn to implement cutting paper. When the paper rolling shaft rolls for driving the cutter to stretch out at a proper position, it will be simpler and more laborsaving to cut the paper because of the upturning angle; and since the paper cutter rotation direction is the same as the paper outputting direction, it is easier to output the paper by this upturning angle. 
     The paper rolling shaft comprises adhesive tapes, at least four adhesive tapes separated from each other are provided along the axial direction of the paper rolling shaft. It is easy to grasp the paper rolling on the paper rolling shaft by using the paper rolling shaft with the adhesive tapes. The paper rolling shaft has a sticking position for installing the adhesive tapes, the shape of the adhesive tapes is a circular ring. The circular ring adhesive tapes are directly stuck in the sticking position. 
     The adhesive tapes are made from the separate circular accessories made of the overmolded plastic package. The adhesive tapes directly buckle into the sticking position. Base on ensuring the smooth outputting of paper, the structure that the paper rolling shaft has to be made of the overmolded plastic package overall is simplified, and the cost is reduced. 
     The connecting shaft is connected with an unidirectional spring device, the unidirectional spring device comprises an unidirectional spring, a first end of the unidirectional spring is fixedly connected with the connecting shaft, a second end of the unidirectional spring is connected with a connecting rod mechanism, the connecting rod mechanism comprises a connecting rod and a connecting rod hinge, the connecting rod hinge is connected with the connecting rod. The connecting rod mechanism is connected with an extension spring, a first end of the extension spring is connected with the connecting rod hinge, a second end of the extension spring is connected with an extension spring guiding wheel, the extension spring is fixedly connected with the left core unit frame via the extension spring guiding wheel. 
     The unidirectional spring sleeves on the connecting shaft. 
     A user can pull out the paper by hand according to the present invention, under the combined effect of the extension spring, the unidirectional spring device and the connecting rod mechanism, the paper will not reverse into the inner of the mechanism totally, but the paper will be reserved for a short length for pulling out the paper by a next user. 
     A core unit backplane is provided on the back of the core unit, the core unit backplane comprises a core unit front backplane and a core unit back backplane. The connecting surface between the core unit front backplane and the core unit back backplane comprises a connector, the core unit front backplane is connected with the core unit back backplane via the connector. 
     Preferably, the core unit front backplane is connected with the core unit back backplane by the buckle. 
     Plug-in assemblies are provided on the core unit front backplane and the side surface of the core unit back backplane, holes matching with the plug-in assemblies are provided on the left core unit frame and the right core unit frame. The core unit front backplane and the core unit back backplane are installed on the left core unit frame and the right core unit frame by the plug-in assemblies. 
     The core unit further comprises a paper outputting guiding plate, long strip holes are provided on the two sides of the paper outputting guiding plate, keys matching with the long strip holes are provided on the left core unit frame and the right core unit frame, the paper outputting guiding plate is provided on the left core unit frame and the right core unit frame through the coupling of the long strip holes and the keys. At least two guiding paper convexes are provided on the bottom of the paper outputting guiding plate, the guiding paper convexes fit the paper outputting guiding roller for pressing the outputted paper to output the cut paper smoothly. 
     Alternatively, a barb connector is provided on the paper outputting guiding plate, the paper outputting guiding plate is connected with the left core unit frame and the right core unit frame via the barb connector. 
     A rotated button is provided on the outer of the right core unit frame, which is installed on the connecting shaft for adjusting easily in installing process. 
     The paper reel frame comprises a left frame and a right frame. The left frame is opposite to the right frame, frame convexes is provided on the surface of the left frame which is opposite to the right frame, the frame convexes is for supporting the paper reel when the left frame is opposite to the right frame. The diameter of the paper reel is 1.5 inches. The bottoms of the left frame and the right frame are connected with the base by plugging. 
     The diameter of the paper shaft of the paper reel also can be 2 inches or 2.25 inches. Adapters are respectively connected with the frame convexes provided on the left frame and the right frame when the diameter of the paper shaft of the paper reel is 2 inches or 2.25 inches. The adapters comprise the adapters adapting to the paper reels that the diameters of the paper shafts are 2 inches and 2.25 inches. Different adapters are inserted for adapting to the paper reels that the diameters of the paper shafts are different. 
     A base is fixedly connected with the core unit and the paper reel frame, a shell is provided on the core unit and the outer of the paper reel frame, the shell comprises a front shell portion and a transparent window which is coupled with the front shell. 
     A clamper is provided on the contacting surface between the front shell and the transparent window, the front shell is fixedly connected with the transparent window by the clamper to implement the inserting fixedly connection, the front shell is connected with the base by hinging from under to open and close up and down. A lock is provided on the base which directly stretches out from the base, a keyhole matching with the lock is provided on the shell, the lock is inserted into the keyhole directly when closing the shell, a professional key is inserted into the keyhole and pressed down when opening the shell. Two dedicated keys are molded directly by injecting on the base, a first key is for daily, a second key is for backup. 
     An ozone generator is provided at the inner of the frame convex, the gas outlet of the ozone generator is provided at the inner of the shell through the frame convexes; a power inputting terminal is provided on the ozone generator. 
     The two ends of the connecting shaft or the paper inputting guiding roller stretch out from the left core unit frame or the right core unit frame, and a variable speed mechanism is connected with an electric generator, the variable speed mechanism is an accelerated mechanism; the power outputting terminal of the electric generator is connected with the power inputting terminal. 
     The electric generator is driven to roll when the paper reel is drawn to roll for generating electricity, the ozone generator is drove by the generated electricity for generating ozone to disinfect the paper reel. The remaining ozone which has disinfected the paper reel releases into the external space for sterilizing, disinfecting and deodorizating the air in the toilet. 
     Further preferably, the power outputting terminal of the electric generator is connected with the power inputting terminal of the electric generator by a battery, a power management module is provided between the battery and the power inputting terminal, the power management module is outputted electricity when the battery voltage is bigger than a pre-set value till the battery voltage is smaller than another pre-set value. The function of storing enough electric energy in the battery to keep the ozone generator working for a period of time and supplying electric energy after the ozone generator works for a period of time is realized. The problem that the ozone generator works in the unstable intermittent state for a long time or even can not work is avoided. 
     The beneficial effect is that: the present invention simplifies the internal structure for meeting the functional requirement that the structure are simpler and the accessories are fewer, the structure of the automatic paper cutting device is simpler, the automatic paper cutting device works more stable, the paper is outputted more smoothly, and the paper of different thickness and quality is capable of being cut automatically. 
     These and other objectives, features, and advantages of the present invention will become apparent from the following detailed description, the accompanying drawings, and the appended claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is an exploded view of an automatic paper cutting device according to the present invention. 
         FIG. 2  is an exploded view of the core unit of the automatic paper cutting device according to the present invention. 
         FIG. 3  is a structure view of the paper rolling shaft of the automatic paper cutting device according to the present invention. 
         FIG. 4  is a connection structure view of the automatic paper cutting device according to the present invention. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     Referring to  FIG. 1 ,  FIG. 2 ,  FIG. 3  and  FIG. 4  of the drawings, an automatic paper cutting device, comprises a paper reel frame  64  for supporting a paper reel  63 , and a core unit  65 , wherein the core unit  65  comprises a paper rolling shaft  29  which the head portion  111  of the paper reel  63  rolls around, and the paper rolling shaft  29  is connected to a cutting device. 
     The head portion  111  of the paper reel  63  rolls around the paper rolling shaft  29 , when a user pulls out the head portion  111 , the paper rolling shaft  29  rolls and the paper reel  63  is driven to roll, when paper of a certain length is outputted, the paper cutting device is driven to implement cutting. 
     The core unit  65  comprises a left core unit frame  17  and a right core unit frame  23 ; a connecting shaft  30  is provided at the center of the paper rolling shaft  29 , the paper rolling shaft  29  is installed on the left core unit frame  17  and the right core unit frame  23  via the connecting shaft  30 ; the paper rolling shaft  29  is installed on the left core unit frame  17  and the right core unit frame  23  via two bearings  19 ,  21  and two bearing sleeves  18 ,  22  matching with the bearings  19 ,  21 . The bearings  19 ,  21  and the bearing sleeves  18 ,  22  are made of plastic. 
     A paper inputting guiding roller  8  is provided between the paper rolling shaft  29  and the paper reel frame  64 , the head portion  111  of the paper reel  63  rolls on the paper rolling shaft  29 . The paper rolling shaft  29  fits the paper inputting guiding roller  8 . A first left fixed sleeve  7  and a first right fixed sleeve  9  are provided at the two ends of the paper inputting guiding roller  8 . The first left fixed sleeve  7  is connected with a first extension spring  6 , the first right fixed sleeve  9  is connected with a second extension spring  10 , the first left fixed sleeve  7  and the first right fixed sleeve  9  are respectively provided on the left core unit frame  17  and the right core unit frame  23  via the first extension spring  6  and the second extension spring  10 . 
     The core unit further comprises a paper outputting guiding roller  26 , wherein a second left fixed sleeve  25  and a second right fixed sleeve  28  are provided at the two ends of the paper outputting guiding roller  26 . The paper outputting guiding roller  26  is provided on the left core unit frame  17  and a right core unit frame  23  via the second left fixed sleeve  25  and the second right fixed sleeve  28 . The paper outputting guiding roller  26  is provided above the front of the paper rolling shaft  29 . The paper outputting guiding roller  26  fits the paper rolling shaft  29 . The head portion  111  of the paper reel  63  rolls on the paper outputting guiding roller  26  through the paper rolling shaft  29 . 
     The paper rolling shaft  29  comprises two detachable connecting parts, the two parts of the paper rolling shaft  29  are connected with each other by connectors, the connectors comprise crews. The two parts of the paper rolling shaft  29  are connected with each other by the crews or other fastening mechanisms. The paper rolling shaft  29  has a long strip groove which the cutting devices are provided in. The cutting devices comprise a paper cutter frame, a paper cutter  13  movably connected with the paper cutter frame. The paper cutter frame comprises a left paper cutter frame  11  and a right paper cutter frame  15 , the left paper cutter frame  11  and the right paper cutter frame  15  are respectively connected with guiding pins  12 ,  14 , the left paper cutter frame  11  and the right paper cutter frame  15  are fixedly connected with the paper rolling shaft  29  via the guiding pins  12 ,  14 . The paper cutter frame  11  is connected with a crank mechanism  16 , the paper cutter frame  11  is connected with the connecting shaft to implement rolling synchronously via the crank mechanism  16 . Preferably, the right paper cutter frame  15  is connected with the crank mechanism  16 . When the connecting shaft rolls, the paper cutter frame rolls synchronously via the crank mechanism  16 , when the crank mechanism  16  rolls for a stroke, the paper cutter  13  implements cutting paper. When designing, the dimension parameters of the crank mechanism  16  are determined according to the length of the paper outputted each time for insuring that the paper cutter  13  is capable of protruding automatically at a proper position when the connecting shaft rolls, so as to implement outputting the paper of the same length. The paper cutter  13  is movably connected with the paper cutter frame  11 , at least 12 cutter teeth are provided on the paper cutter  13 . 
     At a first runtime state, the cutter teeth of the paper cutter  13  face downwardly, the cutter teeth of the paper cutter  13  do not protrude and do not cut down the paper, at a second runtime state, the cutter teeth of the paper cutter  13  face upwardly, the paper implements being cut. When the paper rolling shaft  29  rolls for driving the paper cutter  13  to stretch out at a proper position, it will simpler and more laborsaving to cut the paper because of the upturning angle; and since the paper cutter  13  rotation direction is the same as the paper outputting direction, it is easier to output the paper by this upturning angle. 
     The paper rolling shaft  29  comprises adhesive tapes  27 , at least four adhesive tapes  27  separated from each other are provided along the axial direction of the paper rolling shaft  29 . It is easy to grasp the paper rolling on the paper rolling shaft  29  by using the paper rolling shaft  29  with the adhesive tapes  27 . The paper rolling shaft  29  has a sticking position for installing the adhesive tapes  27 , the shape of the adhesive tapes  27  is a circular ring. The adhesive tapes  27  are made from the separate circular accessories made of the overmolded plastic package. The adhesive tapes  27  directly buckle into the sticking position. Base on ensuring the smooth outputting of paper, the structure that the paper rolling shaft  29  has to be made of the overmolded plastic package overall is simplified, and is reduced costs. 
     The connecting shaft is connected with an unidirectional spring device, the unidirectional spring device comprises an unidirectional spring  5 , a first end of the unidirectional spring  5  is fixedly connected with the connecting shaft, a second end of the unidirectional spring  5  is connected with a connecting rod mechanism, the connecting rod mechanism comprises a connecting rod  3  and a connecting rod hinge  2  connected with the connecting rod  3 . The connecting rod mechanism is connected with an extension spring  4 , a first end of the extension spring  4  is connected with the connecting rod hinge  2 , a second end of the extension spring  4  is connected with an extension spring guiding wheel  1 . The extension spring  4  is fixedly connected with the left core unit frame  17 . 
     A user can pull out the paper by hand according to the present invention, under the combined effect of the extension spring, the unidirectional spring device  5  and the connecting rod mechanism, the paper will not reverse into the inner of the mechanism totally, but the paper will be reserved for a short length for pulling out the paper by a next user. 
     A core unit backplane is provided on the back of the core unit  65 , the core unit backplane comprises a core unit front backplane  31  and a core unit back backplane  32 . The connecting surface between the core unit front backplane  31  and the core unit back backplane  32  comprises a connector, the core unit front backplane  31  is connected with the core unit back backplane  32  via the connector. The connecting surface between the core unit front backplane  31  and the core unit back backplane  32  comprises a buckle device. The core unit front backplane  31  is connected with the core unit back backplane  32  via the buckle device. Plug-in assemblies are provided on the core unit front backplane  31  and the side surface of the core unit back backplane  32 , holes matching with the plug-in assemblies are provided on the left core unit frame  17  and the right core unit frame  23 . The core unit front backplane  31  and the core unit back backplane  32  are installed on the left core unit frame  17  and the right core unit frame  23  via the plug-in assemblies. 
     The core unit  65  further comprises a paper outputting guiding plate  33 , long strip holes are provided on the two sides of the paper outputting guiding plate  33 , keys matching with the long strip holes are provided on the left core unit frame  17  and the right core unit frame  23 , the paper outputting guiding plate  33  is provided on the left core unit frame  17  and the right core unit frame  23  through the coupling of the long strip holes and the keys. At least two guiding paper convexes are provided on the bottom of the paper outputting guiding plate  33 , the guiding paper convexes fit the paper outputting guiding roller for pressing the outputted paper to output the cut paper smoothly. Preferably, a barb connector is provided on the paper outputting guiding plate  33 , the paper outputting guiding plate is connected with the left core unit frame  17  and the right core unit frame  23  via the barb connector. 
     A rotated button  24  is provided on the outer of the right core unit frame  23 , which is installed on the connecting shaft  30  for adjusting easily in installing process. 
     The paper reel frame  64  comprises a left frame and a right frame. The left frame is opposite to the right frame, frame convexes are provided on the surface of the left frame that is opposite to the right frame, the frame convexes are for supporting the paper reel  63 . the diameter of the paper shaft of the paper reel  63  is 1.5 inches. The diameter of the paper shaft of the paper reel  63  also can be 2 inches or 2.25 inches. Adapters are respectively connected with the frame convexes provided on the left frame and the right frame when the diameter of the paper shaft of the paper reel  63  is 2 inches or 2.25 inches. The adapters comprise the adapters adapting to the paper reels that the diameters of the paper shafts are 2 inches and 2.25 inches. Different adapters are inserted for adapting to the paper reels that the diameters of the paper shafts are different. The bottom of the left frame and the right frame is connected with the base  66  by plugging. 
     The core unit  65  and the paper reel frame  64  are fixedly connected with a base  66 , a shell is provided on the core unit  65  and the outer of the paper reel frame  64 , the shell comprises a front shell portion  62  and a transparent window  61  which is coupled with the front shell  62 . 
     The front shell  62  is fixedly connected with the transparent window  61  by plug-in, the front shell  62  is connected with the base  66  by hinging from under to open and close up and down. A lock is provided on the base which directly stretches out from the base  66 , a keyhole matching with the lock is provided on the shell, the lock is inserted into the keyhole directly when closing the shell, a professional key is inserted into the keyhole and is pressed down when opening the shell. Two dedicated keys are molded directly by injecting on the base  66 , a first key is for daily, a second key is for backup. 
     An ozone generator is provided at the inner of the frame convex, the gas outlet of the ozone generator is provided at the inner of the shell through the frame convexes; a power inputting terminal is provided on the ozone generator. The two ends of the connecting shaft or the paper inputting guiding roller stretch out from the left core unit frame or the right core unit frame, and a variable speed mechanism is connected with an electric generator, the variable speed mechanism is an accelerated mechanism; the power outputting terminal of the electric generator is connected with the power inputting terminal. 
     The electric generator is driven to roll when the paper reel  63  is drawn to roll for generating electricity, the ozone generator is driven by the generated electricity for generating ozone to disinfect the paper reel  63 . The remaining ozone which has disinfected the paper reel  63  releases into the external space for sterilizing, disinfecting and deodorizating the air in the toilet. 
     Further preferably, the power outputting terminal of the electric generator is connected with the power inputting terminal of the electric generator via a battery, a power management module is provided between the battery and the power inputting terminal, the power management module outputs electricity when the battery voltage is bigger than a pre-set value till the battery voltage is smaller than another pre-set value. The function of storing enough electric energy in the battery to keep the ozone generator working for a period of time and supplying electric energy after the ozone generator works for a period of time is realized. The problem that the ozone generator works in the unstable intermittent state for a long time or even can not work is avoided. 
     One skilled in the art will understand that the embodiment of the present invention as shown in the drawings and described above is exemplary only and not intended to be limiting. 
     It will thus be seen that the objects of the present invention have been fully and effectively accomplished. Its embodiments have been shown and described for the purposes of illustrating the functional and structural principles of the present invention and is subject to change without departure from such principles. Therefore, this invention includes all modifications encompassed within the spirit and scope of the following claims.