TWI822471B - paper cutter - Google Patents

Abstract

A paper cutting machine includes a machine platform, a guide sliding unit, a central shaft, a central elastic member, a knife rest, a blade unit and a driving unit. The guide sliding unit is slid on a top guide rail of the machine platform, the central axis is inserted into a central sleeve of the guiding sliding unit, the central elastic member makes the central axis move toward the front end constantly, and the tool holder is placed on The central axis includes a front tool holder and a rear tool holder that are butted together. The blade unit includes several blades installed on the tool holder. The driving unit includes a front driven block provided on the front tool holder. A rear driven block provided on the rear tool seat, and a driving member provided on the central axis. The front driven block has several front driven teeth, and the rear driven block has several rear driven teeth. When the driving member presses against the front driven tooth or the rear driven tooth, the tool holder and the blades can be rotated, thereby completing the tool change by pressing.

Description

paper cutter

The invention relates to a manual cutting tool, in particular to a paper cutting machine.

The existing multi-blade paper cutting machine includes a machine platform, a guide rail installed on the machine platform, a slide base slidably installed on the guide rail, and a knife holder rotatably installed in the slide base. , several blades installed on the tool holder, a rotating shaft installed on the tool holder and extending out of the sliding seat, and a knob installed on the rotating shaft and located outside the sliding seat.

To change the blade, the user only needs to turn the knob, and the rotating shaft can drive the knife holder to rotate, thereby achieving the effect of changing the blade.

The existing multi-blade paper cutter has a structure in which blades can be replaced by rotating the knob, and has been used for many years, but no innovative structure has been found.

Therefore, the object of the present invention is to provide a paper cutting machine with a different structure that uses a pressing means to change the blade.

Therefore, the paper cutting machine of the present invention includes a machine table, a guide sliding unit, and a middle A spindle, a central elastic member, a tool holder, a blade unit and a driving unit. The machine platform includes a base and a top guide rail installed on the base along a left-right direction; the guide sliding unit is slidable on the top guide rail and can move along the left-right direction, and includes a top guide rail along the left-right direction. A central sleeve formed in a vertical front-to-back direction toward the front end; the central axis extends along the front-to-back direction and includes a front section, a middle section, and a rear section inserted into the central sleeve; the central elastic member is installed on the central axis and the guide sliding unit, and exerts a constant forward thrust on the central axis; the tool holder is placed on the central axis and is located in front of the guide unit, and includes a front tool holder that is butt-jointed with each other. And a rear tool holder, the front tool holder has a front body, and a front center hole that penetrates the front body along the front and back direction for the central axis to pass through, the front body has a front face, a back face and a connection to the front face With the outer circumferential surface of the rear face, the rear tool seat has a rear body, and a rear center hole that penetrates the rear body along the front-to-back direction for the central axis to pass through. The rear body has a front face, a rear face and a rear face connecting the rear body. The outer peripheral surface of the front and the back; the driving unit includes a front driven block, a rear driven block and a driving member. The front driven block is arranged at the back of the front body and has several holes around the front center. The front driven teeth are equally angularly distributed, and there are several front tooth valley surfaces located between two adjacent front driven teeth and located inside the blades. Each front driven tooth has a tooth peak surface. , and a non-actuating surface and an actuating surface connecting the tooth peak surface and the two adjacent front tooth valley surfaces; the rear driven block is arranged in front of the rear body, and has several holes surrounding the rear center hole. The rear driven teeth are equally angularly distributed and located inside the blades, and several rear driven teeth are located adjacent to each other. On the rear tooth valley surfaces between the teeth, each rear driven tooth has a tooth peak surface, and a non-actuating surface and an actuating surface connecting the tooth peak surface and the two adjacent rear tooth valley surfaces, and the rear tooth peak surface The junction between the peak surface of the driven teeth and the actuating surface is located directly behind the front tooth valley surface of the front driven block; the driving member is disposed on the central shaft and protrudes from an outer axial surface of the central shaft, and the driving member The driving member can be changed from a non-driving position located on the front tooth valley surface of the front driven block, to a rear driving position driving the rear driven block, and to a front driving position driving the front driven block; wherein , when the driving member is in the non-driving position, the driving member presses against the front tooth valley surface, and when the central shaft is pressed to drive the driving member to move backward to the rear driving position, the driving member resists the teeth of the rear driven block At the junction of the peak surface and the actuating surface, the driving member then presses the actuating surface to rotate the rear tool holder, and drives the front tool holder to rotate synchronously with the blade unit. When the rear tool holder rotates to the rear tooth valley surface Pressed by the driving member, the rear tool holder stops rotating. When the central shaft is released, the central elastic member pushes the central shaft forward and drives the driving member to move to the front driving position. The driving member resists At the junction of the tooth peak surface of the front driven block and the actuating surface, the driving member then presses against the actuating surface of the front driven tooth to rotate the front tool holder, and drives the rear tool holder to rotate synchronously with the blade unit, When the front tool seat rotates until the front tooth valley surface is pressed by the driving member, the front tool seat stops rotating.

The effect of the present invention is to complete the tool change by pressing means and provide a paper cutting machine with an innovative structure, thus improving the convenience of use and ensuring or even improving the cutting quality.

1:Machine

11: base

12: Top rail

13: Bottom guide rail

2: Guide sliding unit

21:Top slide

22: Slider

220:set hole

221:top wall

222:Bottom wall

223:Front wall

224:Rear wall

225: Groove

23: Lock cylinder

231:Keyhole

24:The first set of columns

25: Bottom sliding seat

26:Ontology

261: Inlay block

27: Center sleeve

28:Block

281: Grooving

29:Second set of columns

3:Central axis

31: Front section

32: middle section

33:Later section

34:Connection block

35: Accommodation hole

4:Center elastic piece

41: Forefoot section

42: Rear foot section

5: Knife holder

50:Front tool holder

51: Front body

511: front

512:Back

513: Outer peripheral surface

514:Planar part

515: Concave-angled face

52: Front center hole

53:Front keyhole

54:Front storage tank

55: Front pivot hole

500:The first screw

60: Rear tool holder

61:Post-ontology

611: front

612:Back

613: Outer peripheral surface

614: Plane Department

615: Curved face

616: convex corner block

62:Rear center hole

63: Rear locking column

64: Rear storage tank

65:Rear pivot hole

7:Blade unit

71:Blade set

72:Linear blade

73:Dotted Blade

74: folding blade

75:Wave blade

76: mark combination

77: ring belt

78:Graphics group

781: Linear graphics

782:Dotted line graphics

783: Polyline graphics

784:Wave graphics

8: Drive unit

81: Front driven block

82: Front driven tooth

821:Tooth peak surface

822: Non-acting surface

823:Actuating surface

83:Valley surface of front teeth

84:Last driven block

85:Rear driven tooth

851:Tooth peak surface

852:Non-action surface

853:Actuating surface

86: Rear tooth valley surface

87:Driving parts

88:Button

9: Outer cover unit

91: Cover

910:Room

911:Front wall

9111:Bottom perforation

912:Rear wall

913:Left wall

9131:Left perforation

9132: Left bottom chute

914:Right wall

9141: right perforation

9142:Right bottom chute

915:top wall

9151: Top hole

92:Sleeve

93:First lock post

94:Second lock post

95: Pressure plate

96: Elastic parts

97:Second screw

98:Third screw

99:Transparent window

10:Tool holder positioning unit

101: Positioning column

102: Circular groove

103: Positioning slot

110:Arrow

120:arrow

121:arrow

X: forward and backward direction

Y: left and right direction

Z: Top and bottom direction

Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, in which: Figure 1 is a perspective assembly view of an embodiment of the paper cutting machine of the present invention; Figure 2 is a diagram taken from Figure 1 An incomplete cross-sectional view of line II-II; Figure 3 is a partial perspective exploded view of this embodiment, showing a guide sliding unit, a central shaft, a tool holder, a blade unit and an outer cover unit; Figure 4 is A bottom perspective view of a cover body of the outer cover unit; Figure 5 is a partial perspective exploded view of the embodiment, showing the guide sliding unit, the central axis, the tool holder and the blade unit; Figure 6 - similar to Figure 5 The view shows the guide sliding unit, the central axis, a central elastic member, the tool holder, the blade unit and a tool holder positioning unit; Figure 7 is a partial perspective exploded view of the embodiment, showing the central axis, the center The elastic member, the tool holder, the blade unit and a driving unit; Figure 8 is a rear perspective view of a front tool holder of the tool holder; Figure 9 is a front perspective view of a rear tool holder of the tool holder; Figure 10 is A partial perspective assembly view of this embodiment shows that a driving member of the drive unit is in a non-driving position; Figure 11 is a rear view taken from Figure 10; Figure 12 is a partial perspective assembly view of this embodiment, showing The driver is located in a Rear drive position; Figure 13 is a front view taken from Figure 12; Figure 14 is a view similar to Figure 13, showing the rear tool seat and the blade unit rotated 45 degrees; Figure 15 is a view similar to Figure 11 , showing that the front tool holder and the blade unit are rotated 45 degrees, and the driving member is in a front driving position; and Figure 16 is a view similar to Figure 15, showing the state that the front tool holder and the blade unit are rotated another 45 degrees. .

The present invention will be described in detail below with reference to the accompanying drawings and embodiments. Before the present invention is described in detail, attention should be paid to the relative position terms used in the following description, for example, "front and rear direction X", "left and right direction Y", The "top-bottom direction Z" is based on the orientation shown in each figure and the normal usage orientation, and the front-rear direction X, the left-right direction Y and the top-bottom direction Z are perpendicular to each other.

Referring to Figures 1 and 2, an embodiment of the paper cutting machine of the present invention includes a machine table 1, a guide sliding unit 2, a central shaft 3, a central elastic member 4, a tool rest 5, a blade unit 7, and a drive. unit 8, an outer cover unit 9 and a tool holder positioning unit 10.

The machine platform 1 includes a base 11, a top guide rail 12 installed at the rear end of the base 11 and extending along the left-right direction Y and located at the top of the base 11, and a top rail 12 disposed on the base 11. The rear end of the base 11 extends along the left-right direction Y and is located at the bottom guide rail 13 at the front end of the top guide rail 12 .

Referring to Figures 1 to 3, Figure 5, and Figure 6, the sliding guide unit 2 includes a top sliding seat 21 and a bottom sliding seat 25 located on the bottom side of the top sliding seat 21. The top sliding seat 21 and the bottom sliding seat 25 The seat 25 can be integrally formed or can be two independent seats.

The top sliding base 21 slides on the top guide rail 12 and has a slide block 22 extending along the left-right direction Y and defining a sleeve hole 220 that is slidably sleeved on the top guide rail 12 , a lock barrel 23 and two second Set of 24 columns. The slider 22 has a top wall 221 , a bottom wall 222 , a front wall 223 , and a rear wall 224 that cooperate to define the sleeve hole 220 , and an inlay provided on the bottom wall 222 and extending along the left-right direction Y. slot225. The lock cylinder 23 is disposed on the top wall 221 and extends toward the top, and has a lock hole 231 communicating with the sleeve hole 220 . The first sleeve posts 24 are disposed on the top wall 221 and extend toward the top and are respectively located on the left and right sides of the lock barrel 23 .

The bottom sliding base 25 has a body 26 extending along the left-right direction Y, a central sleeve 27 provided on the body 26 and extending toward the front end, and two pieces disposed on the body 26 and extending toward the front end and respectively located on the center sleeve. There are stops 28 on the left and right sides of the barrel 27 , and a second sleeve 29 provided on the body 26 and located in the central sleeve 27 . The body 26 has an insert block 261 located at the top and embedded in the insert groove 225 . Each stopper 28 has a slot 281 extending along the top-bottom direction Z and opening toward the central sleeve 27 .

Referring to Figures 2, 3, 5 to 7, the central axis 3 extends along the front-rear direction X, and includes a front section 31, a middle section 32, and a central sleeve 27 inserted into the bottom slide 25 The rear section 33 , two connecting blocks 34 extending from the front section 31 toward the front end, and a blind receiving hole 35 provided in the rear section 33 and open toward the rear end.

The central elastic member 4 is installed between the central shaft 3 and the bottom sliding seat 25, and gives the central shaft 3 a constant elastic thrust to move toward the front end. In this embodiment, the central elastic member 4 is a compression spring. And located in the central shaft 3 and the central sleeve 27, the central elastic member 4 includes a front foot section 41 located in the receiving hole 35 of the central shaft 3 and resisting the central shaft 3, and a front foot section 41 located in the central sleeve. The rear leg section 42 of the barrel 27 is placed outside the second sleeve column 29 and against the body 26. By the rear leg section 42 being sleeved outside the second sleeve column 29, the strength of the central elastic member 4 can be improved. Stabilizing effect.

Referring to Figures 5 to 9, the tool holder 5 is generally octagonal in shape and is sleeved on the central axis 3 and located on the front side of the guide sliding unit 2. The tool holder 5 includes a front tool holder 50 and a rear tool holder 50 butt-joined with each other. Knife holder 60.

The front tool holder 50 has a generally octagonal front body 51, a front center hole 52 that penetrates the front body 51 along the front-to-back direction There are slots 54 and several front pivot holes 55 . The front body 51 has a front surface 511, a rear surface 512, and an outer peripheral surface 513 connecting the front surface 511 and the rear surface 512. The outer peripheral surface 513 has four planar portions 514 and four concave corner portions 515. The front central hole 52 connects the front 511 and the rear 512 of the front body 51 . In this embodiment, the preceding The number of the keyholes 53 , the front receiving slots 54 and the front pivot holes 55 is four. The front keyholes 53 connect the front 511 and the back 512 of the front body 51 and are distributed at equal angles and close to the front body 51 . The front central hole 52, the front receiving grooves 54 are provided at the rear surface 512 of the front body 51 and are equally angularly distributed and connected to the planar portions 514 respectively, and the front pivot holes 55 connect the front surface 511 of the front body 51 and The rear faces 512 are distributed at equal angles and are respectively located in the front receiving grooves 54. The front key holes 53, the front receiving grooves 54 and the front pivot holes 55 are all distributed at 90 degrees.

The rear tool seat 60 has a generally octagonal rear body 61, a rear central hole 62 that penetrates the rear body 61 along the front-to-back direction There are grooves 64 and several rear pivot holes 65. The rear body 61 has a front face 611, a rear face 612, an outer peripheral surface 613 connecting the front face 611 and the rear face 612 and having four planar portions 614 and four arc-shaped faces 615, and four arc-shaped faces 615. 615 extends toward the front end and is a convex corner block 616 that butts with the concave corner surfaces 515 respectively. The rear central hole 62 communicates with the front face 611 and the back face 612 . In this embodiment, the number of the rear locking posts 63 , the rear receiving slots 64 and the rear pivot holes 65 is four. The rear locking posts 63 correspond to the front locking holes 53 and are arranged in The rear accommodating grooves 64 correspond to the front accommodating grooves 54 and are disposed on the front face 611 of the rear body 61 and communicate with the planar portions 614 respectively, and the rear pivot holes 65 correspond to the corresponding front accommodating grooves 54 . The front pivot holes 55 communicate with the front face 611 and the back face 612 and are respectively located in the rear receiving grooves 64 .

The blade unit 7 includes a blade set 71 and a marking assembly 76. In this example In the embodiment, the blade set 71 includes four linear blades 72 , a dotted line blade 73 , a folding blade 74 and a wavy blade 75 with different cutting functions. The linear blade 72 has a blade shaft 721 extending along the front-rear direction In the accommodating groove 54 and one of the rear accommodating grooves 64, and the linear blade 72 is partially exposed outside the corresponding planar portion 514 and the planar portion 614, the dotted line blade 73 and the planar portion 614 are made by the same technical means. The folding blade 74 , like the wavy blade 75 , is rotatably located in the corresponding front accommodating groove 54 and the rear accommodating groove 64 , and is partially exposed outside the corresponding planar portion 514 and the planar portion 614 .

The marking assembly 76 has an annular band 77 that is looped around the outer peripheral surface 513 of the front body 51 and the outer peripheral surface 613 of the rear body 61 (that is, the annular band 77 is looped around the four planar portions 514 of the front tool holder 50 (between the four arc-shaped surfaces 615 of the rear tool seat 60), and a graphic group 78 corresponding to the blade group 71 is provided on the annular zone 77, the graphic group 78 has a plurality of blades corresponding to the blade group 71 Graphics. In this embodiment, the graphic group 78 has a linear graphic 781, a dashed graphic 782, a polygonal graphic 783 and a graphic corresponding to the linear blade 72, the dotted blade 73, the folded blade 74 and the wavy blade 75 respectively. Wave graphics784. It is easy to understand that the annular band 77 can be omitted, and the straight line graphic 781, the dotted line graphic 782, the polygonal graphic 783 and the wavy graphic blade 784 can be directly arranged on the planar portions 514, which have the same marking function.

When the front tool holder 50 and the rear tool holder 60 are docked and combined, through several first The screws 500 are respectively inserted into the front lock holes 53 along the front and rear direction It is rotatably mounted on the tool holder 5 .

Referring to Figures 2, 3, 7 to 9, the driving unit 8 includes a front driven block 81, a rear driven block 84, a driving member 87 and a pressing button 88.

The front driven block 81 is disposed on the rear surface 512 of the front body 51 of the front tool holder 50 and has a plurality of front driven teeth 82 distributed at equal angles around the front central hole 52, and a plurality of adjacent teeth 82 located adjacent to each other. The front tooth valley surfaces 83 are located between the two front driven teeth 82 and located inside the front receiving grooves 54 respectively. In this embodiment, the number of the front driven teeth 82 and the front tooth valley surfaces 83 is four. Each front driven tooth 82 has a tooth peak surface 821 and connects the tooth peak surface 821 with the corresponding tooth peak surface 821 . There is a non-actuating surface 822 and an actuating surface 823 of two adjacent front tooth valley surfaces 83 . Preferably, the front tooth valley surface 83 is a semicircular groove surface forming a limiting groove open toward the rear end.

The rear driven block 84 is disposed on the front 611 of the rear body 61 of the rear tool holder 60 and has a plurality of rear driven blocks 84 distributed at equal angles around the rear center hole 62 and located inside the rear receiving grooves 64 respectively. Driving teeth 85, and a plurality of rear tooth valley surfaces 86 respectively located between two adjacent rear driven teeth 85. In this embodiment, the number of the rear driven teeth 85 and the rear tooth valley surfaces 86 is four. Each rear driven tooth 85 has a tooth peak surface 851 and connects the tooth peak surface 851 with the corresponding tooth peak surface 851 . A non-actuating surface 852 and an actuating surface 853 of two adjacent rear tooth valley surfaces 86, and the intersection of the tooth peak surface 851 and the actuating surface 853 The boundary is located directly behind the front tooth valley surface 83 of the front driven block 81 .

The driving member 87 is disposed on the middle section 32 of the central shaft 3 and protrudes from an outer axial surface of the central shaft 3 along the radial direction of the central shaft 3 , and the driving member 87 can be located on the front driven block 81 The front tooth valley surface 83 is in a non-driving position, a rear driving position in which the rear driven block 84 is driven, and a front driving position in which the front driven block 81 is driven are changed.

The pressing button 88 is inserted and connected to the two connecting blocks 34 of the central shaft 3. The connecting blocks 34 can also be omitted, and the pressing button 88 is directly connected to the front section 31 of the central shaft 3. Through the pressing button 88, which can be conveniently pressed by the user to operate the driving unit 8.

Referring to Figures 1 to 4, the outer cover unit 9 includes a cover body 91, two sleeves 92, a first locking post 93, two second locking posts 94, a pressure plate 95, two elastic members 96, A second screw 97, two third screws 98 and a transparent window 99.

The cover 91 has a front wall 911 , a rear wall 912 , a left wall 913 , a right wall 914 and a top wall 915 that define a chamber 910 with an open bottom end. The front wall 911 has a bottom through hole 9111 penetrating along the front and rear direction X, the left wall 913 has a left through hole 9131 penetrating along the left and right direction Y and a left bottom chute 9132 with an open bottom end, and the right wall 914 has There is a right through hole 9141 penetrating along the left and right direction Y and a right bottom chute 9142 with an open bottom end. The top wall 915 has a top through hole 9151 penetrating along the front and rear direction X and close to the front wall 911 . The accommodation chamber 910 is used to accommodate the guide sliding unit 2, the central shaft 3, the central elastic member 4, the tool holder 5, the blade unit 7 and the driving unit. Unit 8, the bottom through hole 9111 is for the pressure button 88 to pass through and the pressure button 88 can move along the front and rear direction X, the left through hole 9131 and the right through hole 9141 are used to slide on the top guide rail 12, and the left through hole The distance between 9131 and the right through hole 9141 along the top-bottom direction Z is greater than the distance along the top-bottom direction Z of the top guide rail 12, so that the cover 91 can be displaced relative to the top guide rail 12 along the top-bottom direction Z. The left bottom The slide groove 9132 and the right bottom slide groove 9142 slide on the bottom guide rail 13, thereby improving the movement stability of the cover 91.

The sleeves 92, the first locking columns 93, the second locking columns 94, and the pressure plate 95 correspond to the first sleeve columns 24, the lock cylinders 23, the slots 281 of the stoppers 28, and the knife The rack 5 is disposed on the top wall 915 and extends toward the bottom end and is located in the chamber 910 .

The elastic members 96 are installed between the top slide 21 and the top wall 915 of the cover 91 along the top-bottom direction Z, and can give the cover 91 a constant elastic thrust force to move toward the top. In this embodiment, , the elastic members 96 are compression springs, and are respectively placed outside the first sleeve columns 24 and inserted into the sleeves 92 , thereby improving the stabilizing effect of the elastic members 96 .

The second screw 97 passes through the lock hole 231 of the lock barrel 23 along the top-bottom direction Z and is locked in the first lock post 93 , and the screw head of the second screw 97 can be inserted into the lock hole 231 The top-bottom direction Z moves and is blocked by the lock barrel 23 to limit the movement stroke. The third screws 98 respectively pass through the slots 281 of the stoppers 28 along the top-bottom direction Z and are locked in the third screws 98 . Two locking posts 94 are provided, and the third screws 98 can move along the top-bottom direction Z in the slots 281 , and the screw heads of the third screws 98 can be respectively blocked by the stoppers 28 Block to limit the movement stroke, thereby locking the cover 91 with the guide sliding unit 2, and the cover 91 can move relative to the guide sliding unit 2 along the top-bottom direction Z, and further can move relative to the guide sliding unit 2 2. The top guide rail 12 changes between an ascending position and a descending position.

The transparent window 99 is installed and fixed on the top wall 915 and is located in the top through hole 9151, so that the user can conveniently view the blade unit 7 located in the chamber 910 of the cover 91. The transparent window 99 is installed and fixed on the top wall. The wall 915 may be buckled or locked.

Referring to Figure 6, the tool holder positioning unit 10 includes a pair of positioning posts 101 provided on the front wall 223 of the slide block 22 of the top slide 21 and extending toward the front end, and a corresponding positioning post 101 is provided on the rear tool holder. The rear surface 612 of the rear body 61 of 60 surrounds the circular groove 102 of the rear center hole 62, and four pairs of corresponding linear blades 72, the dotted blade 73, the folded blade 74 and the wavy blade 75 are provided on the body 61 The rear surface 612 is connected to the positioning groove 103 of the circular groove 102 .

During use, refer to Figures 1, 2, 3, and 6. When the cutting machine is in a non-cutting state, the cover 91 is pushed toward the top by the elastic members 96 and is located in the raised position, and the cover 91 is pushed toward the top by the elastic members 96. The cover 91 drives the pressing button 88 , the central shaft 3 , the tool holder 5 and the blade unit 7 to also be in the raised position. At this time, the pair of positioning posts 101 extend into the circular groove 102 , and the tool holder 5 It can rotate around the central axis 3. To put the cutting machine into a cutting state, the user only needs to press down the cover 91 to move the cover 91 to the lowered position, and at the same time drive the pressure button 88, the central shaft 3, and the knife. The frame 5 and the blade unit 7 also move to the lowered position. At this time, the pressure plate 95 presses the tool holder 5, and the pair of positioning posts 101 Enter one of the pair of positioning grooves 103 to prevent the tool holder 5 from rotating around the central axis 3. Then, apply force to push the cover 91 to move in the left and right direction Y, and then use the folding blade 74 at the bottom to move. Cutting work.

To replace the blade, refer to Figure 2, Figure 10, and Figure 11. This embodiment takes the example of replacing the folding blade 74 with the wavy blade 75 as an example. First, the cutting machine is placed in the non-cutting state. At this time, The driving member 87 is in the non-driving position and presses the front tooth valley surface 83 and is limited. Refer to Figure 2, Figure 12 to Figure 15. Then, press the button 88 to drive the central shaft 3 and the driving member 87 toward The rear end moves so that the driving member 87 moves to the rear driving position and collides with the junction of the tooth peak surface 851 and the actuating surface 853 of the rear driven tooth 85. As the driving member 87 continues to move backward to resist, The rear tool seat 60 can be driven to rotate (see arrow 110 in Figure 14) and transform into the actuating surface 853 being pressed by the driving member 87. When the rear tool seat 60 rotates 45 degrees, it transforms into the rear tooth valley surface 86 being pressed by the driving member 87. When the driving member 87 is pressed, the rear knife seat 60 stops rotating. When the rear knife seat 60 rotates 45 degrees, the front knife seat 50 and the blade set 71 are simultaneously driven to rotate 45 degrees (see arrow 120 in Figure 15 ), refer to Figures 2, 15, and 16. Finally, release the button 88, and the central shaft 3 will be pushed forward by the restoring force of the central elastic member 4, which can drive the driving member 87 to move forward synchronously. , so that the driving member 87 moves to the front driving position and contacts the junction of the tooth peak surface 821 and the actuating surface 823 of the front driven tooth 82, and the driving member 87 can be driven by the continuous forward movement of the driving member 87. The front tool seat 50 rotates (see arrow 121 in Figure 16) and changes to the actuating surface 823 being pressed by the driving member 87. When the front tool seat 50 rotates 45 degrees, When the front tooth valley surface 83 is pressed by the driving member 87 , the front tool seat 50 stops rotating. When the front tool seat 50 rotates 45 degrees, the rear tool seat 60 and the blade set 71 are simultaneously driven to rotate. 45 degrees. In this way, once the button 88 is pressed and released, the knife holder 5 and the blade unit 7 can be rotated 90 degrees, and the folding blade 74 can be replaced with the wavy blade 75 for cutting operations.

It is worth noting that the number of blades of the blade set 71 , the number of front driven teeth 82 of the front driven block 81 , and the number of rear driven teeth 85 of the rear driven block 84 are not limited to four. is two or three. When the number of the aforementioned elements is two, the actuating surface 823 of the front driven tooth 82 and the actuating surface 853 of the rear driven tooth 85 are pressed against by the driving member 87, and the front driven tooth 82 can be driven. The tool holder 50 and the rear tool holder 60 rotate 90 degrees, that is, pressing and releasing the button 88 once can cause the tool holder 5 and the blade unit 7 to rotate 180 degrees. When the number of the aforementioned components is three, the tool holder 5 and the blade unit 7 can rotate 180 degrees. The actuating surface 823 of the front driven tooth 82 and the actuating surface 853 of the rear driven tooth 85 are pressed by the driving member 87 to drive the front tool holder 50 and the rear tool holder 60 to rotate 60 degrees, that is, one press, Releasing the pressing button 88 allows the tool holder 5 and the blade unit 7 to rotate 120 degrees.

Through the above description, the functions and advantages of the paper cutting machine of the present invention can be summarized as follows:

1. The present invention uses a pressing means to complete the tool change. Compared with the conventional method of using a rotation means to change the tool, the present invention provides a paper cutting machine with an innovative structure.

2. When the present invention performs cutting operations, the pair of positioning posts 101 enter the One pair of positioning grooves 103 prevents the tool holder 5 from rotating around the central axis 3, thereby ensuring cutting quality.

3. In the present invention, through the transparent window 99, the user can easily view the blade unit 7 located in the chamber 910 of the cover 91, and through the graphic set 78, the user can easily understand which blade is located. Cutting position to improve ease of use.

4. In the present invention, by sliding the left bottom chute 9132 and the right bottom chute 9142 of the cover 91 on the bottom guide rail 13, the movement stability effect of the cover 91 can be improved, and the cutting quality can be improved.

To sum up, the paper cutting machine of the present invention can indeed achieve the purpose of the present invention.

However, the above are only examples of the present invention. They cannot be used to limit the scope of the present invention. All simple equivalent changes and modifications made based on the patent scope of the present invention and the contents of the patent specification are still within the scope of the present invention. within the scope covered by the patent of this invention.

11: base

12: Top rail

2: Guide sliding unit

21:Top slide

22: Slider

220:set hole

23: Lock barrel

231:Keyhole

25: Bottom sliding seat

26:Ontology

27: Center sleeve

29:Second set of columns

3:Central axis

34:Connection block

35: Accommodation hole

4:Center elastic piece

41: Forefoot section

42: Rear foot section

5: Knife holder

50:Front tool holder

60: Rear tool holder

7:Blade unit

71:Blade set

74: folding blade

8: Drive unit

87:Driving parts

88:Button

9: Outer cover unit

91: Cover

910:Room

911:Front wall

9111:Bottom perforation

915:top wall

93:First lock post

95: Pressure plate

96: Elastic parts

97:Second screw

99:Transparent window

10:Tool holder positioning unit

X: forward and backward direction

Y: left and right direction

Z: Top and bottom direction

Claims (10)

A paper cutting machine, including: A machine platform includes a base and a top guide rail installed on the base in a left-right direction; A guide sliding unit is slidable on the top guide rail and can move along the left and right direction, and includes a central sleeve extending toward the front end along a front and rear direction perpendicular to the left and right direction; A central shaft extends along the front-to-back direction and includes a front section and a rear section inserted into the central sleeve; A central elastic member is installed between the central axis and the guide sliding unit, and gives the central axis a constant elastic thrust to move forward; A tool holder is placed on the central axis and is located on the front side of the guide sliding unit, and includes a front tool holder and a rear tool holder that are butt-jointed with each other. The front body has a front center hole for the central shaft to pass through. The front body has a front face, a back face and an outer peripheral surface connecting the front face and the back face. The rear tool holder has a rear body and a penetrating blade along the front and rear direction. The rear body has a rear central hole for the central shaft to pass through. The rear body has a front face, a rear face and an outer peripheral surface connecting the front face and the rear face; A blade unit includes a blade group, the blade group has a plurality of blades, each blade is rotatably installed between the front body and the rear body, and partially exposes the outer peripheral surface of the front body and the rear body. outer peripheral surface; and a drive unit, including A front driven block is arranged at the rear of the front body and has a number of front driven teeth that are equally angularly distributed around the front center hole, and a number of front driven teeth that are located between two adjacent front driven teeth. The front tooth valley surfaces located inside the blades respectively, each front driven tooth has a tooth peak surface, and a non-actuating surface and an actuating surface connecting the tooth peak surface and the adjacent two front tooth valley surfaces; A rear driven block is disposed in front of the rear body and has a plurality of rear driven teeth distributed at equal angles around the rear central hole and located inside the blades, and a plurality of rear driven teeth located on two adjacent back The rear tooth valley surfaces between the driven teeth, each rear driven tooth has a tooth peak surface, and a non-actuating surface and an operating surface connecting the tooth peak surface and the adjacent two rear tooth valley surfaces, and The junction between the peak surface of the rear driven tooth and the actuating surface is located directly behind the valley surface of the front tooth of the front driven block; and A driving member is provided on the central shaft and protrudes from an outer axial surface of the central shaft, and the driving member can be in a non-driving position located on the front tooth valley surface of the front driven block, after driving the rear driven block. The rear driving position of the driving block and the front driving position of the driven block in front of the driving block change; Wherein, when the driving member is in the non-driving position, the driving member presses against the front tooth valley surface, and when the central shaft is pressed to drive the driving member to move backward to the rear driving position, the driving member resists the rear driven block. At the junction of the tooth peak surface and the actuating surface, the driving member then presses the actuating surface to rotate the rear tool holder, and drives the front tool holder to rotate synchronously with the blade unit. When the rear tool holder rotates to the rear tooth valley The surface is pressed by the driving member, and the rear tool holder stops rotating. When the central shaft is released, the central elastic member pushes the central shaft to move forward and drives the driving member to move to the front driving position. It contacts the junction of the tooth peak surface and the actuating surface of the front driven block, and then the driving member presses the actuating surface of the front driven tooth to rotate the front tool holder, and drives the rear tool holder to rotate synchronously with the blade unit. , when the front tool holder rotates until the front tooth valley surface is pressed by the driving member, the front tool holder stops rotating. The paper cutting machine as claimed in claim 1, further comprising an outer cover unit defining a bottom-open chamber for accommodating the guide sliding unit, the central shaft, the central elastic member, the tool holder, The cover body of the blade unit and the drive unit is slid on the top guide rail, the cover body is locked with the guide sliding unit and can move along a top-bottom direction perpendicular to the front-rear direction and the left-right direction, and It can be changed between an ascending position and a descending position relative to the sliding unit. The driving unit also includes a pressing button that penetrates the cover and is movable along the front and rear direction and connected to the front section of the central axis. The paper cutting machine as claimed in claim 2, further comprising a tool holder positioning unit disposed between the guide sliding unit and the rear surface of the rear body of the rear tool holder, including a pair of blades positioned on the guide slide unit and extending toward the front end. a positioning post, a corresponding pair of positioning posts arranged at the back of the rear body and a circular groove surrounding the rear central hole, and a plurality of corresponding pairs of blades arranged at the back of the rear body and connected to the positioning of the circular groove grooves, and the pair of positioning posts can enter or leave one of the pair of positioning grooves. When the cover is in the lowered position, the pair of positioning posts enter the corresponding pair of positioning grooves, so that the tool holder cannot rotate around the central axis. According to the paper cutting machine of claim 2, the outer cover unit further includes a transparent window installed and fixed on the cover body. As for the paper cutting machine of claim 4, the blade unit further includes a marking assembly, the marking assembly has an annular band that is looped around the outer circumferential surface of the front body and the rear body, and a ring disposed on The graphic group of the annulus has several graphics corresponding to the corresponding equal blades. The paper cutting machine of claim 2, wherein the cover has a front wall, a rear wall, a left wall, a right wall and a top wall that cooperate to define the chamber, and the front wall has a supply chamber. The button has a bottom through hole, the left wall has a left through hole for the top guide rail to pass through, and a left bottom chute with an open bottom end. The right wall has a right through hole for the top guide rail to pass through, and a right bottom hole for the top guide rail to pass through. The right bottom chute has an open bottom end. The machine also includes a bottom guide rail located at the rear end of the base and extending along the left and right direction and located at the front end of the top guide rail. The left bottom chute and the right bottom chute are Slide onto the bottom rail. The paper cutting machine as claimed in claim 6, wherein the guide sliding unit includes a top sliding seat slid on the top guide rail, and a bottom sliding seat located on the bottom side of the top sliding seat, and the bottom sliding seat has a The main body, and the central sleeve provided on the main body, the central shaft also has a blind hole provided in the rear section and open toward the rear end, the central elastic member is a compression spring, and includes a hole located in the container. A front leg section is placed in the hole and against the central shaft, and a rear leg section is located in the central sleeve and against the body. The paper cutting machine of claim 7, wherein the tool holder further includes a plurality of first screws that pass through the front body in the front-to-back direction and are locked in the rear body, and the top slide has a screw along the front and rear bodies. The slide block extends in the left and right direction and defines a slide block that is slid into the hole of the top guide rail, and a lock cylinder is provided on the slide block and extends toward the top. The bottom slide base also has two blocks provided on the body and toward the front end. Blocks extend and are located on the left and right sides of the central sleeve. The outer cover unit also includes a first locking post, two second locking posts and two second locking posts extending from the top wall toward the bottom and located in the container. A pressure plate for pressing the tool holder, two elastic members installed between the top sliding seat and the top wall of the cover and giving the cover a constant elastic thrust to move toward the top, one inserted through A second screw is attached to the lock cylinder and is locked on the first lock post and can move along the top and bottom directions, and two screws are respectively passed through the stops and locked on the second lock posts and can be moved along the top and bottom directions. The third screw moves in the top-bottom direction. The paper cutting machine of claim 1, wherein the blade set has four blades, the front driven block has four front driven teeth and four front tooth valley surfaces, and the rear driven block has four rear driven blocks. Driven teeth and four rear tooth valley surfaces. The paper cutting machine of claim 1, wherein the front knife seat also has a plurality of front receiving grooves arranged at the back of the front body and connected to the outer peripheral surface, and the rear knife seat also has several front accommodating grooves arranged on the outer circumferential surface. The front side of the rear body is connected to the rear accommodating groove on the outer peripheral surface of the rear body, and the blades are respectively located between the front accommodating grooves and the rear accommodating grooves.