Disclosure of Invention
Aiming at the technical defects, the invention provides an office wireless adhesive binding device which can overcome the defects.
The office wireless cementing device comprises a machine body, wherein rotating grooves are symmetrically formed in the left and right of the top end of the machine body, rotating pins are arranged in the rotating grooves, an opening and closing door which is in rotating fit with the rotating pins is arranged at the front end of each rotating groove, a handle is arranged at the front end of each opening and closing door, a first groove with a forward opening and communicated with the outside of the machine body is arranged at the lower end of each opening and closing door, a carrying platform with an inclined plane at the rear end is fixed on the lower end wall of each first groove, a folding and printing mechanism is arranged at the lower part of each first groove and comprises a first rotating cavity positioned at the lower part of the left end of the machine body, a first limiting block fixedly connected with the wall body of the machine body is arranged in each first rotating cavity, a driving groove with a backward opening is formed in each first limiting block, a first rack extends backwards is arranged in each driving groove, a first sliding groove is communicated with the rear end of each first rotating, a first spring fixedly connected with the front end wall of the driving groove is fixed at the front end of the first rack, a first gear is meshed at the upper end of the first rack, a first rotary disc is fixedly connected with the right end of the first gear, a first guide rod is fixedly connected with the right side of the front end of the first rotary disc, a first rotary shaft which extends rightwards and is in rotary fit with the machine body is fixed in the middle of the right end of the first rotary disc, a pressure rod which extends rightwards is fixed on the front side of the right end of the first guide rod, the pressure rod extends out of the right end of an arc-shaped groove positioned on the right side of the first rotary cavity and extends into a second rotary cavity positioned at the right end of the arc-shaped groove, a second guide rod positioned in the second rotary cavity is fixed at the right end of the pressure rod, a second rotary disc is fixed on the rear side of the right end of the second guide rod, a third rotary disc is fixed at the right end of the second rotary, the middle part in the machine body is provided with a first driving cavity with a forward opening, a clamping turnover mechanism is arranged in the first driving cavity, a supporting mechanism is arranged at the rear end of the clamping turnover mechanism, the upper part of the first driving cavity is communicated with a second sliding groove with a downward opening, a gluing mechanism is arranged in the second sliding groove, and a transmission mechanism is arranged at the left end of the first sliding groove.
Preferably, the clamping and turning mechanism comprises a first sliding block fixedly mounted on the left and right end walls of the first driving cavity, a movable cavity is arranged in the first sliding block, a second rack in sliding fit with the first sliding block is arranged at the left end in the movable cavity, the second rack extends out of the front and back ends of the first sliding block, a second gear meshed with the second rack is arranged in the movable cavity, a second rotating shaft is fixed at the right end of the second gear, a second groove is arranged at the lower end of the middle part of the second rotating shaft, a second spring fixedly connected with the upper end wall of the second groove is arranged in the second groove, a limiting plate with inclined planes at the lower parts of the front and back sides is fixed at the lower end of the second spring, a fixed block fixedly connected with the lower end wall of the movable cavity is in sliding fit below the limiting plate, a push rod is fixed at the upper end of the middle part of the second rotating shaft, the right end of the second rotating shaft is fixedly provided with a third gear, the lower end of the third gear is meshed with third racks extending out of the front end and the rear end of the first sliding block, the rear ends of the second rack and the third racks are fixedly provided with a baffle, the left side of the baffle is fixedly provided with a first transmission rod, a third guide rod is fixedly arranged in the middle of the rear end of the baffle of the first transmission rod, and a first driven shaft is fixedly arranged at the rear end of the third guide rod.
Preferably, beneficially, the supporting mechanism include with the communicating slip chamber of first drive chamber left side lower extreme, be equipped with rather than front and back wall end fixed connection's first gag lever post in the slip chamber, first gag lever post slidable mounting has upwards to the inside slide bar of first drive chamber, slide bar upper end fixed connection pole, the connecting rod right-hand member is fixed with the second gag lever post, first drive intracavity diapire end left side rear end is fixed with the second stopper, be equipped with the third sliding tray in the second stopper, the preceding wall is fixed with the third spring in the third sliding tray, the third spring rear end is fixed with the third stopper that the top is the inclined plane.
Preferably, the rubber coating mechanism including rotate install in the reciprocal lead screw in the second sliding tray, reciprocal lead screw with wall end normal running fit about the second sliding tray, reciprocal lead screw right-hand member surface threaded connection has the lead screw piece, both ends around the lead screw piece with end wall normal running fit around the second sliding tray, lead screw piece lower extreme is fixed with glues the bucket, it is fixed with heating device to glue the bucket rear end, it has the rolling post to glue bucket lower extreme normal running fit.
Preferably, the transmission mechanism comprises a third rotating cavity positioned on the left side of the second sliding groove, a first bevel gear is arranged in the third rotating cavity, a second transmission rod which extends rightwards into the second sliding groove and is fixedly connected with the left end of the reciprocating screw is fixed at the right end of the first bevel gear, a second bevel gear is meshed at the lower end of the first bevel gear, a third transmission rod which extends into a fourth rotating cavity below the third rotating cavity and is communicated with the left side of the first driving cavity at the right side is fixed at the lower end of the second bevel gear, an upper half shaft coupling of the third bevel gear is fixed at the lower end of the third transmission rod, a lower half shaft coupling of the fourth bevel gear capable of transmitting is arranged at the lower end of the upper half shaft coupling of the third bevel gear, a spline rod is fixed at the lower end of the lower half shaft coupling of the fourth bevel gear, and a fixing plate fixed on the left end wall of the fourth rotating cavity is rotatably matched at the middle part of, a transmission block is fixed at the right end of the fixed plate, a rotation column fixed on the rear end wall of the fourth rotation cavity is in rotating fit with the middle of the transmission block, a torsion spring is arranged on the rotation column, a fourth transmission rod extending into a fifth rotation cavity below the fourth rotation cavity is in spline fit with the lower end of the spline rod, a fifth bevel gear is fixed at the lower tail end of the fourth transmission rod, a sixth bevel gear is meshed with the front end of the fifth bevel gear and is fixed on a power shaft which is in rotating fit with the machine body and extends forwards and backwards, a first barrier plate fixed on the surface of the power shaft is arranged on the rear side of the sixth bevel gear, a fourth spring wound on the surface of the power shaft is fixed on the rear side of the first barrier plate, partial threads positioned on the surface of the power shaft are arranged on the rear side of the fourth spring, and a threaded sleeve is in threaded fit with the threads, the upper end of the threaded sleeve is fixedly provided with the sliding rod, the rear side of the sleeve is provided with a fifth spring wound on the surface of the power shaft, the front end of the fifth spring is fixedly provided with a second stop plate fixedly connected with the surface of the power shaft, the power shaft extends backwards and is in power connection with a motor in the rear end of a fifth rotating cavity, the power shaft extends forwards into a first rotating cavity in front of the fifth rotating cavity, the front tail end of the power shaft is fixedly provided with a seventh bevel gear, the right end of the seventh bevel gear is meshed with an eighth bevel gear, the right end of the eighth bevel gear is fixedly provided with a first rotating rod extending into a second rotating cavity on the right side of the first rotating cavity, the right tail end of the first rotating rod is fixedly provided with a disk, the upper end of the disk is fixedly provided with a first sector fluted disc with a long arc shape, and the lower end of the disk is fixedly provided with a, fan-shaped fluted disc lower extreme of second with first rack toothing, the meshing of first fan-shaped fluted disc upper end has the fourth gear, the fourth gear be fixed with organism normal running fit's and the second dwang that extends right, the meshing of fourth gear upper end has the fifth gear, the fifth gear be fixed with organism normal running fit's and the third dwang that extends right, the third dwang extends right the extension is passed first drive chamber extends to being located in the third transmission intracavity on first drive chamber right side, third dwang right end is fixed with the sixth gear, the extension is passed right to the second dwang first drive chamber extends to being located in the third transmission intracavity on first drive chamber right side, second dwang right end be fixed with the seventh gear of sixth gear meshing.
The beneficial effects are that: the paper binding device is simple in structure and convenient and fast to operate, when the paper binding device works, only the paper needing binding needs to be placed manually, the glued paper is attractive and neat, the bound paper can be obtained only by waiting for a moment, damage caused by misoperation can be avoided, and the safety performance is high.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
The invention will now be described in detail with reference to fig. 1-7, for convenience of description, the following orientations will now be defined: the up, down, left, right, and front-back directions described below correspond to the up, down, left, right, and front-back directions in the projection relationship of fig. 1 itself.
The office wireless cementing device comprises a machine body 1, wherein a rotating groove 10 is symmetrically arranged at the top end of the machine body 1 in the left-right direction, a rotating pin 40 is arranged in the rotating groove 10, an opening and closing door 16 which is in rotating fit with the rotating pin 40 is arranged at the front end of the rotating groove 10, a handle 48 is arranged at the front end of the opening and closing door 16, a first groove 68 with a forward opening and communicated with the outside of the machine body 1 is arranged at the lower end of the opening and closing door 16, a carrying platform 51 with an inclined plane at the rear end is fixed on the lower end wall of the first groove 68, a folding and printing mechanism is arranged at the lower part of the first groove 68, the folding and printing mechanism comprises a first rotating cavity 59 positioned at the lower part of the left end of the machine body 1, a first limiting block 24 fixedly connected with the wall body is arranged in the first rotating cavity 59, a driving groove 92 with a backward opening is arranged in the first limiting block 24, a first sliding groove 62 is communicated with the rear end of the first rotating cavity 59, the first rack 26 extends into the first sliding groove 62, a first spring 61 fixedly connected with the front end wall of the driving groove 92 is fixed at the front end of the first rack 26, a first gear 25 is meshed at the upper end of the first rack, a first rotary disc 23 is fixedly connected with the right end of the first gear 25, a first guide rod 60 is fixedly connected with the right side of the front end of the first rotary disc 23, a first rotary shaft 22 which extends rightwards and is rotatably matched with the machine body 1 is fixed at the middle part of the right end of the first rotary disc 23, a pressure rod 53 which extends rightwards is fixed at the front end of the right end of the first guide rod 60, the pressure rod 53 extends out of the right end of the arc-shaped groove 21 positioned at the right side of the first rotating cavity 59 and extends into a second rotating cavity 19 positioned at the right end of the arc-shaped groove 21, a second guide rod 54 positioned inside the second rotating cavity 19 is fixed at the right end of the pressure, second guide arm 54 right-hand member rear side is fixed with second carousel 18, second carousel 18 right-hand member is fixed with third carousel 17, third carousel 17 with second carousel 18 is fixed in first pivot 22 right-hand member, the middle part is equipped with the first drive chamber 46 that the opening is forward in the organism 1, be equipped with in the first drive chamber 46 and press from both sides tight tilting mechanism, it is equipped with supporting mechanism to press from both sides tight tilting mechanism rear end, first drive chamber 46 upper portion communicates with each other and has opening decurrent second sliding tray 6, be equipped with rubber coating mechanism in the second sliding tray 6, first sliding tray 62 left end is equipped with drive mechanism.
Advantageously, the clamping and turning mechanism includes a first sliding block 47 fixedly mounted on the left and right end walls of the first driving cavity 46, a movable cavity 45 is provided in the first sliding block 47, a second rack 67 slidably engaged with the first sliding block 47 is provided at the left end in the movable cavity 45, the second rack 67 extends out of the front and rear ends of the first sliding block 47, a second gear 66 engaged with the second rack 67 is provided in the movable cavity 45, a second rotating shaft 50 is fixed at the right end of the second gear 66, a second groove 57 is provided at the lower end of the middle portion of the second rotating shaft 50, a second spring 20 fixedly connected with the upper end wall of the second groove 57 is provided in the second groove 57, a limiting plate 56 with inclined surfaces at the lower end of the front and rear sides is fixed at the lower end of the second spring 20, a fixing block 55 fixedly connected with the lower end wall of the movable cavity 45 is slidably engaged under the limiting plate 56, a push rod 14 is fixed to the upper end of the middle of the second rotating shaft 50, a push column 13 is fixed to the upper end of the push rod 14, a third gear is fixed to the right end of the second rotating shaft 50, third racks 52 extending out of the front end and the rear end of the first sliding block 47 are meshed to the lower end of the third gear, a baffle 12 is fixed to the rear ends of the second rack 67 and the third rack 52, a first transmission rod 32 is fixed to the left side of the baffle 12, a third guide rod 58 is fixed to the middle of the rear end of the baffle 12, and a first driven shaft 42 is fixed to the rear end of the third guide rod 58.
Beneficially, the supporting mechanism includes a sliding cavity 82 communicated with the lower end of the left side of the first driving cavity 46, a first limiting rod 79 fixedly connected with the front and rear wall ends of the sliding cavity 82 is arranged in the sliding cavity 82, a sliding rod 81 extending upwards into the first driving cavity 46 is slidably mounted on the first limiting rod 79, a connecting rod 78 is fixed at the upper end of the sliding rod 81, a second limiting rod 77 is fixed at the right end of the connecting rod 78, a second limiting block 37 is fixed at the rear end of the left side of the bottom wall end in the first driving cavity 46, a third sliding groove 74 is arranged in the second limiting block 37, a third spring 75 is fixed at the inner front wall end of the third sliding groove 74, and a third limiting block 76 with an inclined surface above is fixed at the rear end of the third spring 75.
Beneficially, the rubber coating mechanism includes the reciprocal lead screw 5 of rotation installation in second sliding tray 6, reciprocal lead screw 5 with wall end normal running fit about second sliding tray 6, 5 right-hand member surface threaded connection of reciprocal lead screw has lead screw piece 7, both ends around lead screw piece 7 with 6 preceding rear end wall normal running fit of second sliding tray, lead screw piece 7 lower extreme is fixed with glues bucket 8, it is fixed with heating device 72 to glue bucket 8 rear end, it has rolling post 9 to glue bucket 8 lower extreme normal running fit.
Advantageously, the transmission mechanism comprises a third rotating cavity 2 positioned at the left side of a second sliding groove 6, a first bevel gear 3 is arranged in the third rotating cavity 2, a second transmission rod 4 which extends rightwards into the second sliding groove 6 and is fixedly connected with the left end of the reciprocating screw 5 is fixed at the right end of the first bevel gear 3, a second bevel gear 39 is engaged at the lower end of the first bevel gear 3, a third transmission rod 38 which extends into a fourth rotating cavity 36 which is positioned below the third rotating cavity 2 and is communicated with the left side of the first driving cavity 46 at the right side is fixed at the lower end of the second bevel gear 39, a third bevel gear upper half shaft coupling 35 is fixed at the lower end of the third bevel gear upper half shaft coupling 35, a fourth bevel gear lower half shaft coupling 34 capable of transmitting power is arranged at the lower end of the third bevel gear upper half shaft coupling 35, and a spline rod 33 is fixed at the lower end of the fourth bevel gear lower half shaft coupling 34, a fixed plate 93 fixed on the left end wall of the fourth rotating cavity 36 is rotatably fitted in the middle of the spline rod 33, a transmission block 95 is fixed at the right end of the fixed plate 93, a rotating column 94 fixed on the rear end wall of the fourth rotating cavity 36 is rotatably fitted in the middle of the transmission block 95, a torsion spring is arranged on the rotating column 94, a fourth transmission rod 31 extending into a fifth rotating cavity 64 below the fourth rotating cavity 36 is spline fitted at the lower end of the spline rod 33, a fifth bevel gear 90 is fixed at the lower tail end of the fourth transmission rod 31, a sixth bevel gear 91 is engaged at the front end of the fifth bevel gear 90, the sixth bevel gear 91 is fixed on a power shaft 83 which is rotatably fitted with the machine body 1 and extends forward and backward, a first blocking plate 89 fixed on the surface of the power shaft 83 is arranged on the rear side of the sixth bevel gear 91, and a fourth spring 88 wound on the surface of the power shaft 83 is fixed on the rear side of the first blocking plate 89, a partial thread 87 positioned on the surface of the power shaft 83 is arranged on the rear side of the fourth spring 88, a threaded sleeve 86 is screwed on the thread 87, the sliding rod 81 is fixed at the upper end of the threaded sleeve 86, a fifth spring 85 wound on the surface of the power shaft 83 is arranged on the rear side of the sleeve 86, a second stop plate 84 fixedly connected with the surface of the power shaft 83 is fixed at the front end of the fifth spring 85, the power shaft 83 extends backwards and is in power connection with a motor 80 in the rear end of the fifth rotating cavity 64, the power shaft 83 extends forwards to a first transmission cavity 30 positioned in front of the fifth rotating cavity 64, a seventh bevel gear 29 is fixed at the front end of the power shaft 83, an eighth bevel gear 28 is engaged at the right end of the seventh bevel gear 29, a first rotating rod 27 extending to a second transmission cavity 37 positioned on the right side of the first transmission cavity 30 is fixed at the right end of the eighth bevel gear 28, the right end of first rotation pole 27 is fixed with disc 70, disc 70 upper end is fixed with the long first fan-shaped fluted disc 69 of arc, disc 70 lower extreme is fixed with the little second fan-shaped fluted disc 71 of arc, the fan-shaped fluted disc 71 lower extreme of second with first rack 26 meshes, the meshing of first fan-shaped fluted disc 69 upper end has fourth gear 65, fourth gear 65 be fixed with organism 1 normal running fit and the second dwang 44 that extends right, the meshing of fourth gear 65 upper end has fifth gear 63, fifth gear 63 be fixed with organism 1 normal running fit and the third dwang 42 that extends right, third dwang 42 extends right the extension of extending right first drive chamber 46 and extending to being located in the third transmission chamber 15 on first drive chamber 46 right side, third dwang 42 right end is fixed with sixth gear 41, the second rotating rod 44 extends rightwards through the first driving cavity 46 and extends into the third transmission cavity 15 at the right side of the first driving cavity 46, and a seventh gear 43 engaged with the sixth gear 41 is fixed at the right end of the second rotating rod 44.
In an initial state, the opening and closing door 16 is closed, the pressure rod 53 is arranged on the lower end wall of the arc-shaped groove 21, the limit plate 56 abuts against the fixed block 55, the first slide block 47 is parallel to the baffle plate 12, the first fan-shaped toothed disc 69 is not meshed with the fourth gear 65, the second fan-shaped toothed disc 71 is not meshed with the first rack 26, the threaded sleeve 86 abuts against the fifth spring 85, the screw rod block 7 is arranged at the rightmost end of the reciprocating screw rod 5, the transmission block 95 is in a horizontal state, and the upper half coupling 35 is not meshed with the lower half coupling 34;
when the machine starts to work, the handle 48 is manually pulled up, the opening and closing door 16 rotates around the rotation pins 40 which are bilaterally symmetrical in the rotation groove 10 to reach the upper end of the machine body 1 and stop, the pushing column 13 is manually pulled down to enable the pushing rod 14 to rotate backwards, so that the second rotating shaft 50 rotates to drive the third gear and the second gear 66 to rotate, the limiting plate 56 is stressed by the second spring 20 to be compressed to enable the second spring to slide out of the fixing block 55, the first sliding block 47 is driven to slide backwards on the third rack 52 and the second rack 67, paper to be glued is neatly placed between the third rack 52 and the second rack 67, the lower end of the paper to be glued is stopped outside the upper wall end of the second rotating cavity 19, the upper cover to be glued and the lower cover are ninety degrees, the lower cover is positioned on the carrying platform 51, the pushing column 13 is manually pushed back to enable the pushing rod 14 to rotate forwards, so that the second rotating shaft 50 rotates to drive the third gear and the second gear 66 to rotate, and drive the first sliding block 47 to slide forwards on, the limiting plate 56 is compressed by the second spring 20 to enter the fixed block 55 to stop sliding, so as to achieve the effect of clamping paper, the opening and closing door 16 of the pull-down handle 48 rotates around the rotation pins 40 which are bilaterally symmetrical in the rotation groove 10 to return to the initial state, the motor 80 is started, the power shaft 83 rotates to enable the threaded sleeve 86 to slide forward to drive the sliding rod 81 to slide forward on the first limiting rod 79 to compress the fourth spring 88, so that the second limiting rod 77 and the connecting rod 78 move forward, the power shaft 83 rotates to enable the seventh bevel gear 29 to rotate to drive the eighth bevel gear 28 and the first rotation rod 27 to rotate, so that the first sector fluted disc 69 and the second sector fluted disc 71 which are fixed at the upper end of the disc 70 rotate, so that the first rack 26 meshed with the second sector fluted disc 71 slides forward first to enable the first spring 61 to compress to drive the first gear 25 to rotate to enable the first rotating disc 23 to rotate, so that the first rotating shaft 22 rotates to enable the second rotating disc 18 and the third, the first guide rod 60 and the second guide rod 54 rotate to drive the pressure rod 53 to slide upwards in the arc-shaped groove 21 so as to achieve the effect of folding, the first spring 61 rebounds after the second fan-shaped fluted disc 71 is separated from the first rack 26 so as to drive the first rack 26 to move backwards and drive the first gear 25 to rotate backwards, the first rotary disc 23 rotates backwards so as to drive the first rotary shaft 22 to rotate backwards so as to drive the second rotary disc 18 and the third rotary disc 17 to rotate backwards, the first guide rod 60 and the second guide rod 54 rotate to drive the pressure rod 53 to slide downwards in the arc-shaped groove 21, the first fan-shaped fluted disc 69 is meshed with the fourth gear 65 after the second fan-shaped fluted disc 71 is separated from the first rack 26 so as to drive the second rotary rod 44 and the seventh gear 43 to rotate, the fifth gear 63 meshed with the fourth gear 65 rotates, the third rotary rod 42 drives the sixth gear 41 to rotate, the third guide rod 58 is overturned by one hundred eighty degrees backwards, the baffle plate 12 is driven so as to overturn the rack 67 and the third rack 52 drive, so that the folded paper turns over, the paper is parallel to the paper to be glued because of the folding, the pushing post 13 contacts with the third stopper 76 because of the turning, the third stopper 76 compresses the third spring 75 to slide backwards in the third sliding groove 74, so that the pushing post 13 and the connecting rod 78 are mutually limited, the first transmission rod 32 turns over and presses down the transmission block 95 because of the turning of the baffle 12, the transmission block 95 pushes the spline rod 33 upwards around the rotating post 94 to drive the lower half coupling 34 to move upwards, and is in meshing transmission with the upper half coupling 35, because the power shaft 83 rotates to rotate the sixth bevel gear 91, the fifth bevel gear 90 rotates to rotate the fourth transmission rod 31 to rotate the upper half coupling 35, so that the second bevel gear 39 drives the first bevel gear 3 meshed therewith to rotate, so that the second transmission rod 4 drives the reciprocating lead screw 5 to rotate, and the lead screw block 7 slides on the reciprocating lead screw 5 in a reciprocating manner, the glue barrel 8 and the rolling column 9 are driven to reciprocate, the rolling column 9 is in contact with paper for gluing, then the motor 80 rotates reversely, the threaded sleeve 86 slides backwards to drive the sliding rod 81 to slide backwards on the first limiting rod 79 to compress the fifth spring 85, so that the second limiting rod 77 and the connecting rod 78 move backwards to be separated from the pushing column 13, the power shaft 83 rotates reversely to drive the seventh bevel gear 29 to rotate reversely to drive the eighth bevel gear 28 and the first rotating rod 27, the first sector fluted disc 69 is firstly meshed with the fourth gear 65 to rotate, the second rotating rod 44 and the seventh gear 43 rotate reversely, the fifth gear 63 meshed with the fourth gear 65 rotates reversely, so that the third rotating rod 42 drives the sixth gear 41 to rotate reversely to turn the third guide rod 58 forwards by one hundred eighty degrees, the transmission block 95 swings forwards due to the torsion spring to return to the initial state, drives the lower half shaft coupling 34 to move downwards to return to the initial state, drives the baffle 12 to turn over to drive the rack 67 and the third rack 52 to turn forwards the first gear 47, the glued paper is brought back to the initial position, the second fan-shaped toothed disc 71 rotates reversely, so that the first rack 26 meshed with the second fan-shaped toothed disc 71 slides backwards to stretch the first spring 61, the first spring 61 rebounds to pull the first rack 26 back to the initial position after the first spring is separated, the motor 80 is turned off, the handle 48 is manually pulled up, the opening and closing door 16 rotates around the bilaterally symmetrical rotating pins 40 in the rotating groove 10 to reach the upper end of the machine body 1 and stop, the pushing column 13 is manually pulled down to rotate the pushing rod 14 backwards, so that the second rotating shaft 50 rotates to drive the third gear and the second gear 66 to rotate, the limiting plate 56 is forced by the second spring 20 to compress to slide out the sliding block 55 to drive the first spring 47 to slide backwards on the third rack 52 and the second rack 67 to take out the glued paper, the pushing column 13 is manually pushed back to drive the pushing rod 14 to rotate forwards, so that the second rotating shaft 50 rotates to drive the third gear and the second gear 66 to rotate, the first sliding block 47 is driven to slide forwards on the third rack 52 and the second rack 67, the limit plate 56 is compressed by the second spring 20, the fixed block 55 stops sliding and returns to the initial position, and the opening and closing door 16 of the pull-down handle 48 rotates around the rotating pins 40 which are bilaterally symmetrical in the rotating groove 10 and returns to the initial state.
The above description is only an embodiment of the invention, but the scope of the invention is not limited thereto, and any changes or substitutions that are not thought of through the inventive work should be included in the scope of the invention. Therefore, the protection scope of the invention should be subject to the protection scope defined by the claims.