Digital printing machine and printing method

Abstract

The invention discloses a digital printing machine and a printing method. The printing machine comprises a machine platform, a conveyor belt, a material storage device, a mounting frame, a material shifting assembly, a printing module and a guiding assembly. The conveyor belt is arranged on the machine platform, and a first hook is arranged on the belt surface of the conveyor belt; the material storage device is used to store a carrier plate, and a second hook is arranged at the front end of the carrier plate, and the first hook is used to hook the second hook; the mounting frame is arranged on the machine platform, and a contact switch is arranged at the inner top of the mounting frame, and the contact block is used to press the contact switch; the material shifting assembly is transmission-connected to the material storage device, and the contact switch is electrically connected to the motor; the printing module is slidably connected to the mounting frame along the left and right directions, and the printing module is used to spray ink onto the workpiece in the carrier plate; the guiding assembly comprises two correction rails, which are arranged on the mounting frame, and the correction rails extend along the front-back direction, and the two correction rails define a correction channel, and a guide port is arranged at the rear end of the correction channel, and the guide port is arranged to be narrowed from the back to the front.

Description

Technical Field

[0001] The present invention relates to the technical field of operating equipment, and in particular to a digital printing machine and a printing method. Background Art

[0002] Digital printing is a commonly used printing technology nowadays. Existing digital printing machines generally print whole rolls of cloth or single pieces of clothing. When printing a single piece of clothing, it needs to be placed on the printing table manually for printing. Each piece of clothing needs to be placed manually. During the printing period, the operator needs to wait for it to be printed, which is time-consuming and labor-intensive and inconvenient to use. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a digital printing machine that can realize continuous printing operation on clothes, improve efficiency, and reduce manual participation.

[0004] The invention also provides a printing method.

[0005] A digital printing machine according to an embodiment of the first aspect of the present invention comprises a machine platform, a conveyor belt, a material storage device, a mounting frame, a material shifting assembly, a printing module and a guiding assembly, wherein the conveyor belt is arranged on the machine platform, and a first hook is arranged on the belt surface of the conveyor belt; the material storage device comprises a bracket, a support plate, a first elastic member, a push block and a loading tray, wherein the bracket is arranged at the rear end of the machine platform, the support plate is vertically slidably connected to the bracket, the first elastic member is connected between the support plate and the bracket, the first elastic member is used to drive the support plate to slide upward, a limited stopper is arranged at the upper end of the bracket, the limited stopper is used to vertically block the loading tray, the push block is slidably connected to the bracket in the front and rear directions through a second elastic member, the second elastic member is used to drive the push block to slide backward to move away from the loading tray, a shifting rod is arranged on the push block, four supporting rollers are arranged at the lower end of the loading tray, and a front end of the loading tray is provided with The second hook, the first hook is used to hook the second hook, the rear end of the loading tray is provided with a contact block protruding upward, and the loading tray is used to load workpieces; the mounting frame is arranged on the machine platform, and a contact switch is arranged on the inner top of the mounting frame, and the contact block is used to press the contact switch; the material shifting assembly includes a motor and a dial wheel, the dial wheel is rotatably arranged on the bracket, the motor is connected to the dial wheel, the dial wheel is used to shift the dial rod to drive the push block to slide forward, and the contact switch is electrically connected to the motor; the printing module is slidably connected to the mounting frame in the left and right directions, and the printing module is used to print ink on the workpieces in the loading tray; the guide assembly includes two correction rails, the correction rails are arranged on the mounting frame, the correction rails extend in the front and rear directions, the two correction rails define a correction channel, and the rear end of the correction channel is provided with a guide port, and the guide port is narrowed from the back to the front.

[0006] A digital printing machine according to an embodiment of the present invention has at least the following beneficial effects: the material storage device, the material shifting assembly and the loading tray are linked to each other to form a complete set of linkage mechanisms from material preparation to material loading, ensuring that after each printing of the workpiece on the loading tray, there is always one of the loading trays on the support plate in the preparation position, and the first hook is hooked with the second hook on the loading tray to ensure the continuous supply of the loading tray, thereby ensuring the continuous supply of the workpiece, and the worker only needs to put the clothes on the loading tray and put the loading tray into the bracket, so as to realize the continuous printing operation of the clothes, reduce manual participation and improve efficiency.

[0007] According to some embodiments of the present invention, magnets are provided on the first hook and the second hook, and the first hook and the second hook are adsorbed by the magnets, and the adsorption of the provided magnets enables the first hook and the second hook to be connected more stably.

[0008] According to some embodiments of the present invention, two front support plates are provided at the front end of the bracket, the push block is used to push the loading tray onto the front support plates, and the first hook is hooked onto the second hook between the two front support plates.

[0009] According to some embodiments of the present invention, an auxiliary conveyor belt is provided on one side of the correction track close to the correction channel, and the auxiliary conveyor belt is used to drive the carrier plate to move forward. The correction track is used to correct the carrier plate so that the workpiece on the carrier plate can be printed accurately and avoid crooked printing.

[0010] According to some embodiments of the present invention, a kinetic energy recovery device is further included, wherein the kinetic energy recovery device is disposed on the mounting frame and is used to recover the kinetic energy of the printing module.

[0011] According to some embodiments of the present invention, the kinetic energy recovery device includes a spring member, and the left and right ends of the mounting frame are provided with the spring member. The spring member decelerates and stores energy during the sliding of the printing module in the left and right directions. The spring member provides stored kinetic energy for the sliding of the printing module. The kinetic energy recovery device has a simple structure and utilizes the energy storage principle of the spring member to store the kinetic energy of the printing module sliding in the direction of action, thereby reducing the energy consumption of the printing module and reducing costs and saving energy.

[0012] According to some embodiments of the present invention, a UV lamp is further provided on the inner top of the mounting frame, and the UV lamp is used for photocuring ink.

[0013] According to some embodiments of the present invention, the motor is connected to the thumbwheel via a synchronous belt transmission.

[0014] According to some embodiments of the present invention, a walking wheel is provided at the lower end of the bracket.

[0015] A printing method according to a second aspect of an embodiment of the present invention uses a digital printing machine, comprising the following steps:

[0016] Loading: After the workpiece to be printed is loaded on the loading tray, the loading tray is loaded into the support plate. The loading tray is loaded with a plurality of workpieces. The first elastic member drives the support plate to rise, and the loading tray is supported by the support plate and rises synchronously until the loading tray hits the limit stop;

[0017] Printing, start the conveyor belt, during the operation of the conveyor belt, the first hook also follows the conveyor belt to operate until the first hook hooks the second hook, the first hook drags the loading tray to the conveyor belt, so that the loading tray operates together with the conveyor belt, at this time, the support plate pushes the loading tray to move upward under the action of the first elastic member until the loading tray on the uppermost layer abuts against the limit stopper, the loading tray on the conveyor belt passes through the printing module for printing operation, when the loading tray is printed, as the loading tray moves, the contact block presses the contact switch to energize the motor, so that the motor drives the dial wheel to operate, so that the dial wheel toggles the lever to slide the push block forward, and the push block pushes the loading tray on the top layer to the preparation position, after the dial wheel rotates, the push block rebounds under the action of the second elastic member and waits for the next dial wheel toggle, and the first hook can hook the loading tray at the preparation position.

[0018] A printing method according to an embodiment of the present invention has at least the following beneficial effects: the material storage device, the material shifting assembly and the loading tray are linked to each other to form a complete set of linkage mechanisms from material preparation to material loading, ensuring that after each printing of the workpiece on the loading tray, there is always one of the loading trays on the support plate in the preparation position, and the first hook can be hooked with the second hook on the loading tray to ensure the continuous supply of the loading tray, thereby ensuring the continuous supply of the workpiece. The worker only needs to put the clothes on the loading tray and load the loading tray into the bracket, so as to realize the continuous printing operation of the clothes, reduce manual participation and improve efficiency.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 It is a structural schematic diagram of a digital printing machine according to an embodiment of the present invention;

[0022] Figure 2 for Figure 1 An exploded view of a digital printing machine is shown;

[0023] Figure 3 for Figure 1 A schematic diagram of the bottom of a carrier plate of a digital printing machine is shown;

[0024] Figure 4 for Figure 1 A schematic diagram of a digital printing machine from a left angle is shown;

[0025] Figure 5 for Figure 1 A schematic diagram of a correction track and a kinetic energy recovery device on a mounting frame of a digital printing machine is shown.

[0026] Machine 100;

[0027] Conveyor belt 200, first hook 210;

[0028] The material storage device 300, the bracket 310, the limit stopper 311, the front support plate 312, and the walking wheel 313;

[0029] Support plate 320, first elastic member 330, push block 340, second elastic member 341, lever 342;

[0030] The loading tray 350, the supporting roller 351, the second hook 352, and the contact block 353;

[0031] Mounting frame 400, contact switch 410, UV lamp 420;

[0032] The material shifting assembly 500, the motor 510, and the dial wheel 520;

[0033] Printing module 600, correction track 710, auxiliary conveyor belt 711;

[0034] Correction channel 720, guide port 721;

[0035] Kinetic energy recovery device 800 . DETAILED DESCRIPTION

[0036] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0037] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the description of the present invention, "several" means one or more, "more" means two or more, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0039] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0040] Reference Figures 1 to 5A digital printing machine includes a machine platform 100, a conveyor belt 200, a material storage device 300, a mounting frame 400, a material shifting assembly 500, a printing module 600 and a guiding assembly. The conveyor belt 200 is arranged on the machine platform 100, and a first hook 210 is arranged on the belt surface of the conveyor belt 200; the material storage device 300 includes a bracket 310, a support plate 320, a first elastic member 330, a push block 340 and a loading tray 350. The bracket 310 is arranged at the rear end of the machine platform 100, the support plate 320 is vertically slidably connected to the bracket 310, and the first elastic member 330 is connected to the The first elastic member 330 is used to drive the support plate 320 to slide upward between the support plate 320 and the bracket 310. A limit stopper 311 is provided at the upper end of the bracket 310. The limit stopper 311 is used to vertically block the loading tray 350. The push block 340 is connected to the bracket 310 by sliding along the front and rear directions through the second elastic member 341. The second elastic member 341 is used to drive the push block 340 to slide backward to move away from the loading tray 350. A lever 342 is provided on the push block 340. Four support rollers 351 are provided at the lower end of the loading tray 350. A second hook 352 is provided, the first hook 210 is used to hook the second hook 352, a contact block 353 protruding upward is provided at the rear end of the loading tray 350, and the loading tray 350 is used to load the workpiece; the mounting frame 400 is provided on the machine table 100, and a contact switch 410 is provided on the inner top of the mounting frame 400, and the contact block 353 is used to press the contact switch 410; the material shifting assembly 500 includes a motor 510 and a dial wheel 520, the dial wheel 520 is rotatably provided on the bracket 310, the motor 510 is connected to the dial wheel 520, and the dial wheel 520 is used to shift the shifting rod 342 drives the push block 340 to slide forward, and the contact switch 410 is electrically connected to the motor 510; the printing module 600 is slidably connected to the mounting frame 400 along the left and right directions, and the printing module 600 is used to spray ink onto the workpiece in the loading tray 350; the guide assembly includes two correction rails 710, and the correction rails 710 are arranged on the mounting frame 400, and the correction rails 710 extend along the front and rear directions. The two correction rails 710 define a correction channel 720, and the rear end of the correction channel 720 is provided with a guide port 721, and the guide port 721 is narrowed from the back to the front. It can be understood that the first elastic member 330 is used to drive the support plate 320 to slide upward, wherein the first elastic member 330 can also be replaced by a device capable of outputting a linear force, such as a cylinder, a hydraulic cylinder or a linear motor, in order to push the loading plate 350 upward, the push block 340 is slidably connected to the bracket 310 along the front-back direction, the second elastic member 341 is connected between the push block 340 and the bracket 310, the push block 340 and the material-digging assembly 500 are connected by transmission as a whole, and specifically, the motor 510 is connected to the push block 340 by transmission through the dial wheel 520, or the motor 510 is connected to the push block 340 by transmission through a connecting rod mechanism or a crank slider mechanism;

[0041] The contact switch 410 is electrically connected to the circuit of the motor 510 . When the loading tray 350 moves to a certain position, the contact block 353 starts the motor 510 by contacting or pressing the contact switch 410 .

[0042] The material storage device 300, the material shifting assembly 500 and the loading tray 350 are linked to each other to form a complete set of linkage mechanisms from material preparation to material loading, ensuring that after each printing of the workpiece on the loading tray 350, there is always one loading tray 350 on the support plate 320 in the preparation position, and the first hook 210 can be hooked with the second hook 352 on the loading tray 350 to ensure the continuous supply of the loading tray 350, thereby ensuring the continuous supply of the workpiece. The worker only needs to put the clothes on the loading tray 350 and load the loading tray 350 into the bracket 310, which can realize the continuous printing operation of the clothes, reduce manual participation and improve efficiency.

[0043] In some embodiments, magnets are provided on the first hook 210 and the second hook 352. The first hook 210 and the second hook 352 are adsorbed by the magnets, and the adsorption of the magnets enables the first hook 210 and the second hook 352 to be connected more stably. It can be understood that the magnet can be set as an electromagnet.

[0044] In some embodiments, two front support plates 312 are provided at the front end of the bracket 310, and the push block 340 is used to push the loading tray 350 onto the front support plate 312, and the first hook 210 hooks the second hook 352 from between the two front support plates 312. It should be noted that there is a gap between the two front support plates 312, and the first hook 210 hooks the second hook 352 from the gap.

[0045] In some embodiments, an auxiliary conveyor belt 711 is provided on one side of the correction track 710 close to the correction channel 720. The auxiliary conveyor belt 711 is used to drive the carrier plate 350 to move forward. The correction track 710 is used to correct the carrier plate 350 so that the workpiece on the carrier plate 350 can be printed accurately to avoid crooked printing. It can be understood that the auxiliary conveyor belt 711 is an independent conveyor belt. After the carrier plate 350 contacts the correction track 710, the auxiliary conveyor belt 711 will rely on friction to carry the carrier plate 350 forward, thereby playing a role of auxiliary transportation, and also plays a role of clamping the side of the carrier plate 350.

[0046] In some embodiments, a kinetic energy recovery device 800 is further included. The kinetic energy recovery device 800 is disposed on the mounting frame 400 . The kinetic energy recovery device 800 is used to recover the kinetic energy of the printing module 600 .

[0047] In some embodiments, the kinetic energy recovery device 800 includes a spring member. The left and right ends of the mounting frame 400 are provided with spring members. The spring members decelerate and store energy during the sliding of the printing module 600 in the left and right directions. The spring members provide stored kinetic energy for the sliding of the printing module 600. The kinetic energy recovery device 800 has a simple structure and utilizes the energy storage principle of the spring member to store the kinetic energy of the printing module 600 sliding in the direction of action, thereby reducing the energy consumption of the printing module 600 and reducing costs and saving energy.

[0048] In some embodiments, the kinetic energy recovery device 800 can also be a power generation device. During the sliding of the printing module 600 to the left and right, the sliding of the printing module 600 is used to drive the turbine of the power generation device, so that the inertial kinetic energy of the printing module 600 is stored. Specifically, the power generation device includes a power generation turbine. The rotation of the power generation turbine can cut the magnetic flux lines to generate electrical energy. The power generation device is a conventional power generation device. Here, it is mainly explained that the power generation turbine is connected to the mounting frame 400 through a gear and a rack pair. The printing module 600 pushes the rack during the sliding direction to the left and right, and the rack drives the gear to rotate. The gear drives the power generation turbine to rotate to generate electricity. The rack is slidably connected to the mounting frame 400, and the gear and the power generation turbine are coaxially arranged and rotate synchronously, and the gear meshes with the rack.

[0049] In some embodiments, a UV lamp 420 is further disposed on the inner top of the mounting frame 400 , and the UV lamp 420 is used for photocuring ink.

[0050] In some embodiments, the motor 510 is connected to the paddle wheel 520 via a synchronous belt drive.

[0051] In some embodiments, a travel wheel 313 is disposed at the lower end of the bracket 310 .

[0052] A printing method, using a digital printing machine, comprises the following steps:

[0053] Loading: After the workpiece to be printed is loaded on the loading tray 350, the loading tray 350 is loaded into the support plate 320. The loading tray 350 is loaded with a plurality of workpieces. The first elastic member 330 drives the support plate 320 to rise, and the loading tray 350 is supported by the support plate 320 and rises synchronously until the loading tray 350 hits the limit stopper 311.

[0054] Printing, start the conveyor belt 200. During the operation of the conveyor belt 200, the first hook 210 also runs with the conveyor belt 200 until the first hook 210 hooks the second hook 352. The first hook 210 drags the loading tray 350 to the conveyor belt 200, so that the loading tray 350 runs together with the conveyor belt 200. At this time, the support plate 320 pushes the loading tray 350 upward under the action of the first elastic member 330 until the uppermost loading tray 350 abuts against the limit stopper 311. The loading tray 350 on the conveyor belt 200 passes through the printing module 600 for printing. After the loading tray 350 is printed, as the loading tray 350 moves, the contact block 353 presses the contact switch 410 to energize the motor 510, so that the motor 510 drives the dial wheel 520 to run, so that the dial wheel 520 toggles the dial rod 342 to make the push block 340 slide forward. 0 Push the loading tray 350 on the top layer to the preparation position. After the dial wheel 520 rotates, the push block 340 rebounds under the action of the second elastic member 341 and waits for the next dial wheel 520 to be dialed. The first hook 210 can hook the loading tray 350 in the preparation position. The material storage device 300, the material dialing assembly 500 and the loading tray 350 are linked to each other to form a complete set of linkage mechanisms from material preparation to material loading, ensuring that after each printing of the workpiece on the loading tray 350, there is always one loading tray 350 on the support plate 320 in the preparation position. The first hook 210 can hook the second hook 352 on the loading tray 350 to ensure the continuous supply of the loading tray 350, thereby ensuring the continuous supply of the workpiece. The worker only needs to put the clothes on the loading tray 350 and load the loading tray 350 into the bracket 310, so as to realize the continuous printing operation of the clothes, reduce manual participation and improve efficiency.

[0055] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A digital printing machine, characterized in that: include: Machine (100); A conveyor belt (200) is arranged on the machine platform (100), and a first hook (210) is arranged on the belt surface of the conveyor belt (200); The material storage device (300) comprises a bracket (310), a support plate (320), a first elastic member (330), a push block (340) and a loading tray (350), wherein the bracket (310) is arranged at the rear end of the machine platform (100), the support plate (320) is vertically slidably connected to the bracket (310), the first elastic member (330) is connected between the support plate (320) and the bracket (310), the first elastic member (330) is used to drive the support plate (320) to slide upward, and a limit stopper (311) is arranged at the upper end of the bracket (310), the limit stopper (311) is used to vertically block the loading tray (350), The push block (340) is slidably connected to the bracket (310) in the front-to-back direction via a second elastic member (341); the second elastic member (341) is used to drive the push block (340) to slide backwards to move away from the loading tray (350); a lever (342) is provided on the push block (340); four supporting rollers (351) are provided at the lower end of the loading tray (350); a second hook (352) is provided at the front end of the loading tray (350); the first hook (210) is used to hook the second hook (352); a contact block (353) protruding upwards is provided at the rear end of the loading tray (350); and the loading tray (350) is used to load workpieces; A mounting frame (400) is arranged on the machine platform (100); a contact switch (410) is arranged on the inner top of the mounting frame (400); and the contact block (353) is used to press the contact switch (410); A material shifting assembly (500) comprises a motor (510) and a dial wheel (520), wherein the dial wheel (520) is rotatably disposed on the bracket (310), the motor (510) is drivingly connected to the dial wheel (520), the dial wheel (520) is used to shift the shifting rod (342) so as to drive the push block (340) to slide forward, and the contact switch (410) is electrically connected to the motor (510); A printing module (600) is slidably connected to the mounting frame (400) in a left-right direction, and the printing module (600) is used to spray ink onto the workpiece in the loading tray (350); A guide assembly, comprising two correction rails (710), the correction rails (710) being arranged on the mounting frame (400), the correction rails (710) extending in a front-to-rear direction, the two correction rails (710) defining a correction channel (720), a guide opening (721) being arranged at a rear end of the correction channel (720), the guide opening (721) being arranged to narrow from the rear to the front; The first hook (210) and the second hook (352) are both provided with magnets, and the first hook (210) and the second hook (352) are attracted by the magnets. The front end of the bracket (310) is provided with two front support plates (312), and the push block (340) is used to push the loading tray (350) onto the front support plates (312). The first hook (210) is hooked onto the second hook (352) between the two front support plates (312). The correction track (710) is provided with an auxiliary conveyor belt (711) on one side close to the correction channel (720). The auxiliary conveyor belt (711) is used to drive the loading plate (350) to move forward, and also includes a kinetic energy recovery device (800). The kinetic energy recovery device (800) is arranged on the mounting frame (400). The kinetic energy recovery device (800) is used to recover the kinetic energy of the printing module (600). The kinetic energy recovery device (800) includes a spring member. The spring member is arranged at the left end and the right end of the mounting frame (400). The spring member is used to decelerate and store energy during the sliding process of the printing module (600) in the left and right directions. The spring member provides stored kinetic energy for the sliding of the printing module (600).

2. A digital printing machine according to claim 1, characterized in that: A UV lamp (420) is also provided on the inner top of the mounting frame (400), and the UV lamp (420) is used for light curing ink.

3. A digital printing machine according to claim 1, characterized in that: The motor (510) is connected to the thumbwheel (520) via a synchronous belt transmission.

4. A digital printing machine according to claim 1, characterized in that: The lower end of the bracket (310) is provided with a walking wheel (313).

5. A printing method, characterized in that: The digital printing machine according to claim 1 is used, comprising the following steps: Loading: after the workpiece to be printed is loaded on the loading tray (350), the loading tray (350) is loaded into the support plate (320), the loading tray (350) is loaded with a plurality of workpieces, the first elastic member (330) drives the support plate (320) to rise, and the loading tray (350) is supported by the support plate (320) to rise synchronously until the loading tray (350) hits the limit stopper (311); Printing, the conveyor belt (200) is started, and during the operation of the conveyor belt (200), the first hook (210) also follows the operation of the conveyor belt (200) until the first hook (210) hooks the second hook (352), and the first hook (210) drags the loading tray (350) to the conveyor belt (200), so that the loading tray (350) operates together with the conveyor belt (200). At this time, the support plate (320) pushes the loading tray (350) upward under the action of the first elastic member (330) until the uppermost loading tray (350) abuts against the limit stopper (311), and the loading tray (350) on the conveyor belt (200) passes through the printing module ( 600) performs a printing operation, when the loading tray (350) is printed, as the loading tray (350) moves, the contact block (353) presses the contact switch (410) to energize the motor (510), so that the motor (510) drives the dial wheel (520) to operate, so that the dial wheel (520) toggles the lever (342) to slide the push block (340) forward, and the push block (340) pushes the loading tray (350) on the top layer to a ready position, and after the dial wheel (520) rotates, the push block (340) rebounds under the action of the second elastic member (341) to wait for the next dial wheel (520) toggles, and the first hook (210) can hook the loading tray (350) at the ready position.

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