A self-service printing device

Abstract

This invention discloses a self-service printing device, comprising a housing with an observation window and a temporary storage mechanism and a release mechanism located within the housing. The temporary storage mechanism consists of multiple parallel and inclined support units arranged sequentially along the normal direction of the observation window; the front support unit and its paper obscure the content area of ​​the rear paper, with only the side serial number area exposed. Each support unit has a support plate, a holding member, and a conductive bead. The release mechanism has electrical contacts aligned with the conductive beads. When the contact is activated, it drives the corresponding holding member to switch from holding to releasing, allowing the target paper to slide out along the support plate. This structure achieves physical obscuring of the content area and visibility of the serial number during the temporary storage stage, supporting accurate single-page release; the side serial number is permanently exposed for easy identification and position mapping; the number of contacts is small, the wiring is simple, and the paper is fed by gravity, reducing the risk of missorting and jamming, improving confidentiality, efficiency, and reliability; the structure is modular and easy to maintain.

Description

Technical Field

[0001] This application relates to the field of printers, and more particularly to a self-service printing device. Background Technology

[0002] Self-service printing equipment typically includes a housing, a printer module, and a paper output / receive unit. Printed papers are usually stacked horizontally or at a slight angle on a shared tray, or distributed to several fixed paper compartments. To reduce information leakage, existing solutions often employ methods such as stacking face down, adding covers, locking paper compartments, or dropping the entire document into an envelope. For ease of retrieval, some systems use sorters / displacement trays for simple part-by-part separation. However, when multiple documents are queued for printing and temporarily stored inside the equipment, the document content area may still be exposed during the waiting or sorting process. Furthermore, the output trays are often stacked as a whole, making it difficult to consistently achieve the desired arrangement effect where the previous page effectively obscures the content of the following page while only revealing the side markings.

[0003] On the other hand, existing self-service printing equipment generally relies on time sequence or simple position counting for accurate release of "target pages / copies," lacking a deterministic mapping relationship with the page's side serial number (or coding band). Even if some devices set identification marks on the paper side, they often do not establish a one-to-one correspondence with the specific carrying position, making it difficult to quickly and accurately release a single page or simultaneously release a continuous segment of pages to form a complete document in scenarios where multiple copies are temporarily stored in parallel. In addition, traditional sorting / release mechanisms often require a large number of independent actuators and contacts, resulting in complex connections, high maintenance costs, and poor fault tolerance. When multiple target documents need to be released simultaneously, there is a risk of missorting, secondary handling, or paper jams. Based on this, there is an urgent need for a self-service printing equipment structure that can achieve content area obscuring and serial number area visibility during the temporary storage stage, and can complete "single-page selection release" and "continuous segment linkage release" under limited contact conditions. Summary of the Invention

[0004] The purpose of this application is to solve the problems mentioned above, such as the easy exposure of the content area when documents are temporarily stored in self-service printing devices, and the lack of a one-to-one mapping between serial numbers and carrier units, which makes it impossible to select accurately.

[0005] According to one aspect of this application, a self-service printing device is provided for printing documents containing a content area and a side serial number area, comprising:

[0006] The casing is equipped with an observation window;

[0007] The temporary storage mechanism, located inside the housing, consists of multiple parallel and inclined support units arranged relative to the horizontal plane. Each support unit is arranged sequentially along the normal direction of the viewing window and is used to support document paper.

[0008] When viewed along the normal direction of the observation window, the carrying unit located near the observation window and the paper it supports obscure the content area of ​​the paper on the adjacent carrying unit located away from the observation window, while the side serial number area of ​​each paper is exposed.

[0009] Each support unit includes a support plate, a retaining member, and a conductive bead, wherein the conductive bead and its corresponding support plate and retaining member are disposed in the same support unit;

[0010] The release mechanism is provided with an electrical contact that aligns with the conductive beads. When the electrical contact makes contact with any conductive bead, it switches the holding member of the corresponding carrier unit of the conductive bead from a retention state to a release state. The retention state is used to block the paper from sliding along the carrier plate, and the release state is used to allow the paper to slide along the carrier plate.

[0011] Preferably, the temporary storage mechanism is provided with a loop bus conductor arranged along the arrangement direction of the carrier units; each conductive bead is electrically connected only to the electric actuator of its carrier unit via an independent branch wire. A continuous segment consisting of several adjacent carrier units is selected along the arrangement direction of the carrier units, wherein the conductive bead of the carrier unit located at the end near the observation window is defined as the first conductive bead, and the conductive bead of the carrier unit located at the end away from the observation window is defined as the last conductive bead; when the electrical contact simultaneously contacts and conducts electricity with the first and last conductive beads of the continuous segment, a closed power supply path is established between the two ends through the loop bus conductor, so that the electric actuators of each carrier unit in the continuous segment are simultaneously energized, and their holding components synchronously switch from the storage state to the release state, thereby realizing the linkage release of all pages in the segment.

[0012] Preferably, the release mechanism includes a gripper mechanism disposed below the bearing unit; the gripper mechanism includes:

[0013] The claw frame is fixed on the follower platform or base, and its front end is provided with an alignment window.

[0014] The gripper arms are arranged in pairs and pivotally connected to the gripper frame via a hinge shaft. The gripper arms are provided with anti-slip pads on the inner side and limit blocks on the outer side.

[0015] The electrical contact is located at the free end of at least one gripper arm, assembled via an insulating base and electrically connected to the lead terminal, and the electrical contact is provided with an elastic compensation spring in the axial direction;

[0016] A return spring is provided at the root of the gripper arm to keep the gripper open in the released state;

[0017] The electrical contact is located on the underside of the free end of the gripper arm and tilted upwards, so as to generate a micro-scratching contact when aligned and approaching the target conductive bead.

[0018] Preferably, the retaining member includes:

[0019] A miniature electromagnetic actuator, comprising a coil frame and a coil assembly fixed to a mounting base on the underside of a support plate;

[0020] The movable iron core reciprocates in a straight line along the guide hole;

[0021] The return spring is a compression spring and is sleeved on the guide section of the iron core;

[0022] The force transmission component is a shift fork, eccentric wheel or connecting rod, one end of which is hinged to the movable iron core and the other end is connected to the stop of the retaining component.

[0023] A mechanical limit block is provided at the two extreme positions of the retaining member;

[0024] When the electrical contact is connected to the conductive bead, the coil is energized and attracts the movable iron core, which in turn drives the holding member to switch from the retention state to the release state through the force transmission member.

[0025] Preferably, the release mechanism further includes a displacement driving mechanism, which includes:

[0026] Linear guides include guide rails and sliders arranged along the direction of the load-bearing units;

[0027] The follower platform is rigidly connected to the slider and is used to fix the gripper mechanism;

[0028] The actuator is a stepper motor coupled with a ball screw mechanism or a synchronous belt drive mechanism;

[0029] Limit switches or photoelectric sensors are located at both ends of the travel distance;

[0030] Cable chain or flexible wire harness guide groove, used to restrain cables;

[0031] The actuator drives the follower stage to move the gripper mechanism between multiple alignment positions.

[0032] Preferably, it further includes a stack-shifting mechanism, which includes:

[0033] The receiving compartment has a paper inlet and a paper outlet, and is equipped with a support surface and guide ribs inside.

[0034] The transfer unit includes a guide and a drive, and the receiving compartment is mounted on a platform that can move along the guide;

[0035] The release mechanism is located at the bottom of the receiving compartment or at the paper output end. It is a flip-door or sliding door structure and is equipped with a return spring or a return motor.

[0036] When the receiving compartment is in the delivery position, the release component opens the support surface to release the paper.

[0037] Preferably, the temporary storage mechanism is located below the movement range of the receiving compartment and is provided with a docking interface, the docking interface including:

[0038] The alignment component is located at the paper output end of the receiving compartment and the feed side of the temporary storage mechanism, and is a positioning pin that engages with a positioning hole or a cone that engages with a recess.

[0039] A material guiding component is provided on the feeding side of the temporary storage mechanism, including a downwardly curved inward guiding lip and a guiding groove surface connected thereto.

[0040] Preferably, it further includes a developing chamber, which comprises:

[0041] Metal frame;

[0042] The document card slot is located within the frame and consists of a transparent side panel and a bottom positioning block;

[0043] The head mounting plate is located in front of the slot and is connected to the frame via a slide rail and a screw and nut mechanism.

[0044] The linear scanner bracket is located on the side of the slot, and an optical window or light guide mounting position is provided in front of it.

[0045] Preferably, the imaging chamber is equipped with a page sequence organizing mechanism, including:

[0046] The guiding component is a guide plate or a guide roller;

[0047] The receiving groove is a U-shaped groove or a box-shaped groove, with an elastic support plate at the bottom and a limiting edge at the groove opening;

[0048] The clamping component includes a clamping plate and a drive mechanism mounted on a linear guide pair.

[0049] Preferably, the retaining member is a rotatable baffle or a liftable pin;

[0050] The rotatable baffle is pivotally connected to the bearing plate via a hinge seat and a pin.

[0051] The liftable pin is guided to move up and down via a linear guide sleeve and is equipped with a return spring;

[0052] The retaining member is mechanically connected to the electro-actuator via a fork, connecting rod, or linear push rod.

[0053] This application offers the following advantages: Implementing the technical solution of this embodiment, the carrier units are stacked and arranged at an angle relative to the horizontal plane along the normal direction of the observation window. The front page forms a stable physical shielding of the content area of ​​the back page, with only the side serial number area exposed, achieving a confidential and visible effect even during the temporary storage stage. Within each carrier unit, there is a one-to-one correspondence between the "carrier plate—holding member—conductive bead." The release mechanism uses a limited electrical contact to align and connect with the selected conductive bead, triggering the corresponding holding member to switch from the retention state to the release state, completing the precise release of a single page. The remaining units are not energized and remain in storage, reducing false triggering and crosstalk. The paper slides along the carrier plate under gravity, resulting in a simple paper path, low friction, and low risk of jamming. The number of contacts and wiring is significantly reduced, making the structure more reliable, easier to maintain, and lower in cost. The side serial number is permanently exposed, facilitating identification and establishing a clear mapping with the carrier position, supporting rapid addressing and scheduling. Attached Figure Description

[0054] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0055] Figure 1 This is a schematic diagram of the appearance of the self-service printing device according to one embodiment of this application;

[0056] Figure 2 This is a schematic diagram of the arrangement of devices inside the self-service printing device according to one embodiment of this application;

[0057] Figure 3 This is a schematic diagram of the temporary storage mechanism of the self-service printing device according to one embodiment of this application.

[0058] Figure 4 This is a schematic diagram of the temporary storage mechanism of the self-service printing device described in one embodiment of this application, viewed from the normal direction of the observation window.

[0059] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0060] Figure 6 This is a schematic diagram of the stack-shifting mechanism of the self-service printing device according to one embodiment of this application;

[0061] Figure 7 This is a schematic diagram of the appearance of the carrier unit of the self-service printing device according to one embodiment of this application;

[0062] Figure 8This is a schematic diagram of the release mechanism of the self-service printing device according to one embodiment of this application;

[0063] Figure 9 This is a schematic diagram illustrating the switching of the working state of the temporary storage mechanism of the self-service printing device described in one embodiment of this application.

[0064] Explanation of reference numerals: 1000, Self-service printing device; 100, Housing; 110, Observation window; 200, Temporary storage mechanism; 210, Support unit; 211, Support plate; 212, Holding component; 213, Conductive bead; 214, First conductive bead; 215, Last conductive bead; 216, Electro-actuated part; 300, Paper; 310, Content area; 320, Side serial number area; 400, Release mechanism; 410, Electrical contact; 420, Gripper mechanism; 421, Gripper frame; 422, Gripper arm; 423, Anti-slip pad; 500, Stacking mechanism; 510, Receiving compartment; 520, Moving part; 530, Release component. Detailed Implementation

[0065] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. Preferred embodiments of this application are shown in the drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0067] Please refer to Figure 1 - Figure 9 One embodiment of this application provides a self-service printing device 1000 for printing documents containing a content area 310 and a side serial number area 320. It includes a housing 100, and a temporary storage mechanism 200 and a release mechanism 400 disposed within the housing 100.

[0068] The housing 100 is provided with an observation window 110;

[0069] The temporary storage mechanism 200 is located inside the housing 100 and consists of multiple parallel and inclined support units 210. Each support unit 210 is arranged sequentially along the normal direction of the observation window 110 and is used to support the document paper 300.

[0070] When viewed along the normal direction of the observation window 110, the carrier unit 210 located near the observation window 110 and the paper 300 it supports obstruct the content area 310 of the paper 300 on the adjacent carrier unit 210 located away from the observation window 110, and the side serial number area 320 of each paper 300 is exposed.

[0071] Each support unit 210 includes a support plate 211, a retaining member 212 and a conductive bead 213, with the conductive bead 213 and its corresponding support plate 211 and retaining member 212 disposed in the same support unit 210;

[0072] The release mechanism 400 is provided with an electrical contact 410 that aligns with the conductive bead 213. When the electrical contact 410 makes contact with any conductive bead 213 and conducts electricity, the holding member 212 of the corresponding carrier unit 210 of the conductive bead 213 is switched from a retention state to a release state. The retention state is used to block the paper 300 from sliding along the carrier plate 211, and the release state is used to allow the paper 300 to slide along the carrier plate 211.

[0073] In this embodiment, it should be noted that: see Figures 1-9 The device includes a housing 100 and a temporary storage mechanism 200 and a release mechanism 400 disposed inside the housing 100. An observation window 110 is provided on the front side of the housing 100 for observing the internal arrangement along its normal direction N. The temporary storage mechanism 200 is formed by a series of multiple carrying units 210, each carrying unit 210 having an inclination angle α (preferably 5° to 30°) on the horizontal plane and arranged sequentially from front to back along the N direction. Each carrying unit 210 includes: a carrying plate 211 rotatably mounted on a support, a holding member 212 disposed on the carrying plate 211, and conductive beads 213 corresponding to that carrying unit 210. The sliding direction of the carrying plate 211 is consistent with the component of gravity. In the storage state, the holding member 212 forms a protruding stop to prevent the paper 300 from sliding down; in the release state, it retracts into or below the paper receiving reference plane to release the paper 300. The conductive bead 213 is installed at the corresponding position of the support unit 210 and is electrically connected to the electric actuator 216 of the unit through an independent branch, forming a one-to-one action chain of "conductive bead 213 - support plate 211 - holding member 212".

[0074] The geometric overlap of the carrier unit 210 along the normal direction of the observation window is set to be greater than the projection length of the content area 310 of the paper 300 in the normal direction of the observation window. Thus, in the normal direction of the observation window, the front carrier unit 210 and its paper 300 form a stable blockage of the content area 310 of the rear paper 300, with only the side serial number area 320 exposed, which is easy to identify.

[0075] The release mechanism 400 is located below the temporary storage mechanism 200 and is equipped with a limited number of electrical contacts 410 (single or in pairs), mounted on an alignable actuator. During operation, the electrical contacts 410 align with and make contact with the conductive beads 213 of the target carrier unit 210. The electro-actuated part 216 of the target unit is energized, driving the holding member 212 to switch from the holding state to the release state. The paper 300S slides out along the carrier plate 211 by gravity and enters the downstream working area. To ensure reliable contact, the electrical contacts 410 may have elastic compensation for stroke and micro-scratching angle, and the conductive beads 213 may have a plated contact surface.

[0076] The electro-actuator 216 is a miniature drive component installed inside each carrier unit 210. It receives circuit signals from the conductive bead 213 and converts electrical energy into mechanical action, thereby driving the holding member 212 to switch between the retention state and the release state.

[0077] Furthermore, the electro-actuated part 216 includes: an electromagnetic drive assembly, which includes a coil frame fixedly installed below the support plate 211 and a coil winding wound thereon; a movable iron core, disposed in the axial guide hole of the coil, which can be attracted by magnetic force to move linearly along the guide hole when energized, and pushed back to its original position by a reset spring when de-energized; a transmission mechanism, connected between the movable iron core and the holding member 212, for converting the linear motion of the iron core into the rotation or lifting motion of the holding member 212; the transmission mechanism can be one of a shift fork, a connecting rod, an eccentric wheel or a linear push rod; and a mechanical limiting structure, disposed at the end of the movement path of the holding member 212, for limiting the retention position and the release position, to ensure the accuracy and repeatability of state switching.

[0078] When the electrical contact 410 makes contact with the target conductive bead 213 and conducts electricity, the current flows through the independent branch wire corresponding to the conductive bead 213 to the coil of the electro-actuator 216. The coil is energized and generates a magnetic field, which attracts the movable iron core to overcome the force of the reset spring and generate displacement. Then, through the transmission mechanism, the holding member 212 is switched from the holding state to the release state, and the paper 300 is able to slide out along the inclined support plate 211.

[0079] The technical solution implemented in this embodiment can: form a front page that obscures the back page in the viewing direction, exposing only the side serial number area 320, thus achieving both content confidentiality and rapid identification during the temporary storage stage; trigger unit-level action by aligning and conducting the conductive bead 213 and the electrical contact 410 to accurately release the selected page while keeping other pages in place, reducing missorting and crosstalk; complete page output by gravity, with a simple paper path, low risk of friction and jamming, small structure and wiring scale, and friendly maintenance and cost; establish a definite mapping between serial number identification and carrying position, facilitating positioning, addressing and scheduling by upper-level control, and adapting to scenarios of parallel temporary storage and on-demand delivery of multiple documents.

[0080] Furthermore, the temporary storage mechanism 200 is provided with a loop bus conductor arranged along the arrangement direction of the carrier units 210; each conductive bead 213 is electrically connected only to the electric actuator 216 of its carrier unit 210 via an independent branch wire. A continuous segment composed of several adjacent carrier units 210 is selected along the arrangement direction of the carrier units 210, wherein the conductive bead 213 of the carrier unit 210 located at the end near the observation window 110 is defined as the first conductive bead 214, and the conductive bead 213 of the carrier unit 210 located at the end away from the observation window 110 is defined as the last conductive bead 215; when the electrical contact 410 simultaneously contacts and conducts with the first conductive bead 214 and the last conductive bead 215 of the continuous segment, a closed power supply path is established between the two ends through the loop bus conductor, so that the electric actuator 216 of each carrier unit 210 in the continuous segment is energized simultaneously, and its holding member 212 is synchronously switched from the storage state to the release state, thereby realizing the linkage release of all pages in the segment.

[0081] In this embodiment, it should be noted that: the temporary storage mechanism 200 lays a loop bus conductor along the arrangement direction of the carrier units 210 as a common loop path; the conductive beads 213 of each carrier unit 210 are connected point-to-point to the electro-actuator 216 of the carrier unit 210 through independent branch wires, forming a closed-loop topology of "conductive beads 213 - electro-actuator 216 - bus conductor". Several adjacent carrier units 210 are selected along the arrangement direction (from near the observation window 110 to away from the observation window 110) to form a continuous segment. The conductive beads 213 of the carrier unit 210 located at the end near the observation window 110 are defined as the first conductive beads 214, and the conductive beads 213 of the carrier unit 210 located at the end away from the observation window 110 are defined as the last conductive beads 215. The release mechanism 400 is configured with paired electrical contacts 410 that can align with the first conductive bead 214 and the last conductive bead 215. When the two contacts simultaneously contact and conduct the first and last conductive beads 213, power is injected through both ends, and the circuit bus conductor establishes a closed power supply path between the two ends. The electro-actuated parts 216 of each carrying unit 210 in the section simultaneously receive operating current, and their holding members 212 simultaneously switch from the holding state to the release state, realizing the coordinated delivery of the entire page segment. If only one conductive bead 213 is contacted, only the corresponding carrying unit 210 closes the circuit and releases a single page.

[0082] The circuit bus conductor is a common electrical circuit channel laid inside the temporary storage mechanism 200 and extending along the arrangement direction of the carrying units 210. Its core function is to provide a low-impedance common return path for the electric actuators 216 of multiple carrying units 210, and it is a key electrical infrastructure for realizing the "continuous segment linkage release" function.

[0083] Furthermore, the specific implementation of the circuit bus conductor includes:

[0084] Conductor form: It is a continuous strip, rod, or copper-clad trace on a printed circuit board (PCB), fixedly mounted on the bracket or substrate of the temporary storage mechanism 200, and its length covers the arrangement range of all carrier units 210.

[0085] Electrical connection: One end of the electric actuator 216 of each carrier unit 210 is connected to the circuit bus conductor through an independent wire, thereby forming a complete closed circuit of "power positive terminal → electrical contact 410 → conductive bead 213 → branch wire → electric actuator 216 → circuit bus conductor → power negative terminal".

[0086] Segment linkage working mechanism: When it is necessary to release a continuous segment consisting of several adjacent carrying units (210), the paired electrical contacts 410 of the release mechanism 400 simultaneously contact and conduct electricity with the first conductive bead 214 and the last conductive bead 215 of the segment. Current is injected from the first end, flows through the electrically actuated parts 216 of all units in the segment, converges to the circuit bus conductor, and finally flows back to the power supply from the end. This operation establishes a parallel power supply circuit between the first and last ends, so that all electrically actuated parts 216 in the segment are energized and activated simultaneously, thereby realizing the synchronous release of the entire segment page.

[0087] It has a low resistivity to ensure minimal circuit voltage drop when driving multiple electric actuators 216 simultaneously, preventing release failure due to insufficient power supply to the end unit. This conductor is fixed by an insulating support or coated with an insulating varnish layer to ensure electrical isolation between it and the equipment's metal structure, preventing short circuits. The design of this circuit bus conductor eliminates the need for a separate complete power supply circuit for each carrier unit 210, greatly simplifying the wiring structure. Through the ingenious design of "selecting the beginning and end to conduct the entire area," only two electrical contacts 410 are needed to control the coordinated action of any continuous segment, achieving efficient and reliable batch document release operations with minimal hardware cost.

[0088] The technical solution implemented in this embodiment can achieve two release modes under limited contact conditions: one is single-point selection, which accurately releases the target page; the other is first- and last-point selection, which releases the entire segment or even the entire document at once, with fewer actions and higher efficiency. At the same time, the unselected carrier units 210 are not powered on and remain in place, and the overlapping and blocking relationship between the front and rear remains effective, reducing the risk of false triggering and crosstalk, and taking into account confidentiality, reliability and simplified wiring.

[0089] Furthermore, the release mechanism 400 includes a gripper mechanism 420 disposed below the bearing unit 210; the gripper mechanism 420 includes:

[0090] The claw 421 is fixed on the follower platform or base, and its front end is provided with an alignment window;

[0091] The paired gripper arms 422 are pivotally connected to the gripper frame 421 via a hinge shaft. The inner side of the gripper arm 422 is provided with an anti-slip pad 423, and the outer side is provided with a limiting block.

[0092] Electrical contact 410 is disposed at the free end of at least one gripper arm 422, is assembled through an insulating base and electrically connected to the lead terminal, and the electrical contact 410 is provided with an elastic compensation spring in the axial direction.

[0093] A return spring is located at the root of the gripper arm 422 to keep the gripper open in the released state;

[0094] Electrical contact 410 is located on the underside of the free end of gripper arm 422 and is tilted upwards to generate micro-scratching contact when aligned and brought close to the target conductive bead 213.

[0095] In this embodiment, it should be noted that the release mechanism 400 adopts a gripper mechanism 420 and is arranged below the support unit 210. The gripper mechanism 420 is composed of a gripper frame 421 fixed on the follower platform or base. The front end of the gripper frame 421 is provided with an alignment window to guide the gripper to coaxially align with the target conductive bead 213. Paired gripper arms 422 are pivotally connected to the gripper frame 421 via hinge shafts. Anti-slip pads 423 are laid on the inner side to provide frictional stability during contact, and limiting blocks are provided on the outer side to limit the opening and closing stroke and prevent over-travel impact. At least one gripper arm 422 has an electrical contact 410 mounted on its free end. The electrical contact 410 is connected to the lead terminal through an insulating seat and has an axial elastic compensation stroke reserved to absorb alignment errors and thickness tolerances. A return spring is provided at the root of the gripper arm 422 to keep the gripper open in the non-drive state. Electrical contact 410 is located on the underside of the free end of gripper arm 422 and is relatively inclined upwards. When the gripper moves toward the conductive bead 213, it forms a slight scraping contact, which helps to remove oxide film and dirt and improves conductivity stability. The gripper can move along the arrangement direction of the bearing unit 210 in conjunction with the linear displacement component to complete rapid alignment at multiple positions. During contact, anti-slip pad 423 provides lateral support, and limit block suppresses overpressure, ensuring repeatability accuracy and service life.

[0096] The technical solution implemented in this embodiment can improve the alignment accuracy and electrical contact reliability of the conductive bead 213, and reduce contact resistance and the probability of contact separation due to jitter. The default opening and power failure self-reset are achieved by the reset spring, which enhances fault tolerance and safety. The anti-slip pad 423 and the limit block suppress local overload and stroke overshoot, which extends the life of the contacts and conductive bead 213. The structure is compact and the parts are highly interchangeable, which makes it easy to integrate with the linear module, realize multi-point fast selection and switching, and balance efficiency, stability and maintenance cost.

[0097] Furthermore, the retaining component 212 is provided with:

[0098] A miniature electromagnetic actuator, comprising a coil frame and a coil assembly fixed to a mounting base on the underside of a support plate 211;

[0099] The movable iron core reciprocates in a straight line along the guide hole;

[0100] The return spring is a compression spring that is sleeved on the guide section of the iron core;

[0101] The force transmission component is a shift fork, eccentric wheel or connecting rod, one end of which is hinged to the movable iron core and the other end is connected to the stop of the retaining component 212.

[0102] Mechanical limit blocks are located at the two extreme positions of the retaining member 212;

[0103] When the electrical contact 410 is connected to the conductive bead 213, the coil is energized and attracts the movable iron core, which drives the holding member 212 to switch from the retention state to the release state through the force transmission member.

[0104] In this embodiment, it should be noted that: a miniature electromagnetic actuator is integrated within the retaining member 212 as a driving source; the coil frame and coil assembly are fixed on the mounting base on the lower side of the support plate 211, forming a static magnetic circuit; the movable iron core is disposed in a guide hole coaxial with the coil, reciprocating linearly along the hole axis; a compression return spring is provided on the outer periphery or guide section of the iron core to push the iron core back to the initial end when power is off. The iron core and the retaining member 212 are connected by a force transmission component, which can be a fork, eccentric wheel, or connecting rod, with one end hinged to the iron core and the other end connected to the stop body of the retaining member 212, so as to convert the linear engagement stroke into the rotation or lifting stroke of the retaining member 212. Mechanical limit blocks are provided at the two extreme positions of the retaining member 212 to limit the retention state and release state, avoid over-stroke impact, and stabilize repeated positioning. During operation, after the electrical contact 410 makes contact with the conductive bead 213 and conducts electricity, the coil is energized and generates a magnetic field that attracts the iron core to overcome the force of the reset spring and move forward along the guide hole. The iron core, through the force transmission component, drives the holding component 212 to switch from the holding state to the release state, allowing the paper 300 to slide along the support plate 211. After power is cut off, the reset spring returns to its original position, and the holding component 212 returns to the holding state, achieving unit-level self-reset. To improve durability and consistency, a low-friction bushing can be installed in the guide hole, a wear-resistant coating can be applied to the contact surface of the contact / conductive bead 213, and the force transmission chain gap can be controlled by elastic pre-tightening.

[0105] The technical solution implemented in this embodiment can provide a compact, highly responsive unit-level drive with clear release action and short switching time; it achieves stable two-position positioning by relying on spring self-reset and mechanical limit, with high repeatability and low risk of overtravel; it confines the conversion of electrical energy-magnetic force-mechanical displacement within the bearing unit 210, resulting in simple wiring and facilitating modular replacement and maintenance; it reduces wear and jamming probability through guiding and low-friction cooperation, improving long-term operational reliability; it is compatible with baffle-type or pin-type retaining components 212, and the stroke and torque can be flexibly matched to different paper weights and tilt angles by parameters such as coil turns, core stroke, and force ratio.

[0106] Furthermore, the release mechanism 400 also includes a displacement drive mechanism, which includes:

[0107] The linear guide includes a guide rail and a slider arranged along the arrangement direction of the bearing unit 210;

[0108] The follower platform is rigidly connected to the slider and is used to fix the gripper mechanism 420.

[0109] The actuator is a stepper motor coupled with a ball screw mechanism or a synchronous belt drive mechanism;

[0110] Limit switches or photoelectric sensors are located at both ends of the travel distance;

[0111] Cable chain or flexible wire harness guide groove, used to restrain cables;

[0112] The actuator drives the follower stage to move the gripper mechanism 420 between multiple alignment positions.

[0113] In this embodiment, it should be noted that the release mechanism 400 is equipped with a displacement drive mechanism to achieve multi-point alignment of the gripper mechanism 420 in the arrangement direction of the bearing units 210. The displacement drive mechanism includes a linear guide (guide rail and slider) arranged along the arrangement direction of the bearing units 210. The follower platform is rigidly connected to the slider, and the gripper mechanism 420 is fixed on the follower platform. The actuator uses a stepper motor in conjunction with a ball screw mechanism or a synchronous belt drive mechanism. The motor output end is connected to the ball screw or pulley via a coupling to achieve linear drive of the follower platform. Limit switches or photoelectric sensors are set at both ends of the stroke for origin reset and overtravel protection. To ensure that the cable stress is controlled during movement, a drag chain or flexible wire harness guide groove is configured on one side of the linear guide to limit the bending radius and movement path. An alignment reference surface and mounting groove can be set on the follower platform to adjust the height and front-back offset of the gripper mechanism 420, thereby obtaining stable alignment and contact stroke under different bearing unit 210 height and tilt angle conditions.

[0114] The technical solution implemented in this embodiment can provide high-precision linear positioning along the arrangement direction of the bearing units 210, ensuring that the gripper mechanism 420 and the target conductive bead 213 are aligned and improved, thus enhancing contact reliability. The ball screw / synchronous belt allows for adjustable speed and resolution, covering the motion requirements of "rapid positioning—slow contact," reducing impact and vibration. Limit and origin signals ensure safety boundaries and repeated zeroing, reducing the risk of overtravel and malfunction. A drag chain / wire harness guides and protects the follower cable, extending its lifespan and facilitating maintenance. The modular platform for mounting the gripper mechanism 420 facilitates assembly, calibration, and replacement, adapting to different bearing unit pitches and heights. Under limited contact points, multi-point displacement positioning enables selective point selection of multiple bearing units 210 and dual-point selection at the beginning and end of sections, coordinating with the electrical structure to complete the linkage release of single pages or continuous sections, improving overall efficiency and reliability.

[0115] Optionally, the device also includes a stack-shifting mechanism 500, which includes:

[0116] The receiving compartment 510 has a paper inlet and a paper outlet, and is equipped with a support surface and guide ribs inside.

[0117] The transfer unit 520 includes a guide and a drive, and the receiving compartment 510 is mounted on a platform that can move along the guide.

[0118] Release element 530 is located at the bottom of receiving compartment 510 or at paper output end. It is a flip door or sliding door structure and is equipped with a return spring or return motor.

[0119] When the receiving compartment 510 is in the delivery position, the release component 530 opens the support surface to release the paper 300.

[0120] In this embodiment, it should be noted that the transfer mechanism 500 is arranged between the upstream paper feeding section and the temporary storage mechanism 200, and is used to transfer paper 300 between multiple feeding positions. The receiving compartment 510 adopts a box-type cavity structure, with a paper inlet at the front end and a paper outlet at the rear end. A support surface is provided at the bottom of the cavity, and guide ribs are arranged on both sides to limit the swaying of the paper 300 and stabilize its direction. The receiving compartment 510 is installed on a platform that can move linearly along the guide members, and is driven by the drive member to sequentially align with each feeding position; after it is in position, the release member 530 opens the support surface, and the paper 300 falls into the downstream station under the action of gravity through the paper outlet. Then the release member 530 resets to continue the next sheet. The release member 530 can be in the form of a flip door or a sliding door, and can be reliably closed with the help of a reset spring or a reset motor; the paper outlet edge and the support surface of the receiving compartment 510 can be made into a flared mouth and chamfered to reduce the impact of falling paper and edge scratching, and to keep the paper 300 in a stable posture during reciprocating transfer.

[0121] The technical solution implemented in this embodiment can achieve rapid allocation of multiple feeding positions within a limited space, shortening the single-sheet turnaround time; it uses the supporting surface and guide ribs to stabilize the paper 300 posture, reducing the risk of paper jams and rebound; it obtains a predictable opening-closing cycle through the flip-plate / sliding door and reset mechanism, and has the ability to self-reset or controlled reset even when power is off; it only partially opens at the moment of feeding, which facilitates the formation of a continuous material guiding channel with the downstream temporary storage mechanism 200, improving paper dropping accuracy and compatibility, thereby improving the overall sorting efficiency and operational reliability of the machine.

[0122] Furthermore, the temporary storage mechanism 200 is located below the movement range of the receiving compartment 510 and is equipped with a docking interface, which includes:

[0123] The alignment component is located at the paper output end of the receiving compartment 510 and the feed side of the temporary storage mechanism 200, and is a positioning pin that fits with a positioning hole or a cone that fits with a recess.

[0124] The material guiding component is located on the feeding side of the temporary storage mechanism 200, and includes a downwardly curved inward guiding lip and a guiding groove surface connected thereto.

[0125] In this embodiment, it should be noted that the temporary storage mechanism 200 is positioned entirely below the movement range of the receiving chamber 510, establishing a mechanical and material guiding interface between them. This interface comprises two types of components: one is an alignment component, arranged at the paper output end of the receiving chamber 510 and the material input side of the temporary storage mechanism 200, using a positioning pin and positioning hole, or a frustum and recess; preferably, an inlet chamfer or rounded corner transition is provided on the receiving chamber 510 side, and a micro-taper and guide chamfer can be provided at the end of the positioning pin to compensate for minor deviations in the lateral and vertical directions, improving alignment accuracy. Second, the material guiding component is arranged on the feeding side of the temporary storage mechanism 200. It consists of a downwardly curved guiding lip and a guiding groove surface connected to it. When the guiding lip and the paper output end of the receiving bin 510 are in place, they form a continuous paper guiding path. The guiding groove surface can be corrugated or slightly curved to reduce the contact area, and a buffer pad or thin-walled elastic sheet is set on the edge of the groove to absorb instantaneous impact. If necessary, a slight inclination and dust collection groove are arranged at the bottom of the groove to reduce dust accumulation.

[0126] The technical solution implemented in this embodiment enables repeatable and reliable alignment between the receiving compartment 510 and the temporary storage mechanism 200, ensuring a continuous material guiding channel between the paper output end and the feeding side, reducing swaying, scraping, and rebound during the paper dropping process; maintaining stable alignment even when there are assembly tolerances, thermal deformation, or operational vibrations, improving the paper dropping hit rate and anti-jamming ability; both the alignment component and the material guiding component are passive and simple structures, with low manufacturing and maintenance costs, easy cleaning, and thus improved overall machine reliability and maintainability.

[0127] Optionally, the device also includes a display chamber, which includes:

[0128] Metal frame;

[0129] The document card slot is located inside the frame and consists of a transparent side panel and a bottom positioning block;

[0130] The head mounting plate is located on the front side of the slot and is connected to the frame via a slide rail and screw nut mechanism.

[0131] The linear scanner bracket is located on the side of the card slot, and an optical window or light guide mounting position is provided in front of it.

[0132] In this embodiment, it should be noted that the imaging chamber is set as an independent module and fixed to a metal frame. A document slot is formed within the frame, consisting of a pair of transparent side plates and a bottom positioning block. The transparent side plates restrict the orientation of the paper 300 and provide a lateral viewing channel, while the positioning block provides a lower edge reference and repeat positioning. A imaging head mounting plate is installed on the front of the slot. The mounting plate is adjusted forward / backward and up / down via a slide rail and a screw-nut mechanism, and is equipped with a locking device to maintain a stable position after adjustment. The mounting plate can be reserved with a tilt adjustment slot to correct the angle between the optical axis and the paper surface. A linear scanner bracket is set on the side of the slot. An optical window or light guide mounting position is opened in front of the bracket to guide or shape the lateral illumination / imaging light path. The bracket is arranged parallel to the transparent side plates of the slot, so that the serial number area 320 on the side of the paper 300 is stably aligned within the scanning field of view. To suppress environmental interference, vibration damping pads and light- and dust-proof structures can be added to the frame and mounting plate, and the corners of the card slots can be rounded and deburred to reduce the risk of edge scraping.

[0133] The technical solution implemented in this embodiment enables front-page alignment imaging and stable reading of side serial numbers within a limited space: through the transparent side panel and positioning block, the paper 300 remains flat and consistent with the reference during imaging, improving image clarity and repeatability; through the slide rail and lead screw fine adjustment, the imaging head obtains a precise working distance and angle, facilitating rapid focusing and field calibration; the linear scanner and optical window (or light guide) maintain a constant relative position with the side serial number area 320, improving the reliability of lateral code reading; the modular frame facilitates assembly, adjustment, and maintenance, while in conjunction with the upstream temporary storage and shielding structure, only the necessary window and side code channel are exposed, balancing confidentiality and reading efficiency.

[0134] Furthermore, the developing chamber is equipped with a page sequence organizing mechanism, including:

[0135] The guiding component is a guide plate or a guide roller;

[0136] The receiving groove is a U-shaped groove or a box-shaped groove, with an elastic support plate at the bottom and a limiting edge at the groove opening;

[0137] The clamping component includes a clamping plate and a drive mechanism mounted on a linear guide pair.

[0138] In this embodiment, it should be noted that the page alignment mechanism is located in the downstream working area within the developing chamber. It includes paired guide members, a receiving groove with elastic support plates and limiting edges, and a pressing member mounted on a linear guide pair. The guide members are guide plates or guide rollers arranged facing each other, forming a guide channel that defines the side edge of the paper 300. The channel width can be finely adjusted by adjusting grooves or eccentric shafts, and chamfers or fillets are provided at the paper infeed end to reduce the risk of edge scraping. The receiving groove is a U-shaped groove or a box-type groove, with elastic support plates at the bottom for support and buffering. The support plates use leaf springs or spring pads to achieve conformal stroke. Limiting edges are provided around the groove opening to define the paper 300 boundary and provide a lateral reference. The pressing member consists of a pressing plate mounted on the linear guide pair and a drive mechanism. The pressing plate faces the receiving groove, and its working surface can be covered with an elastic coating. The drive mechanism can be a stepper motor with a ball screw or eccentric wheel drive, with mechanical limits or sensor stops at the stroke end for performing pressing actions in the forward / backward / left / right directions. After the paper is inserted, the guide component first limits the position, and the paper 300 drops into the receiving groove and is supported by the elastic support plate. Then the pressure plate moves back and forth along the guide rail to apply pressure to the paper stack and complete the edge alignment and shape sorting.

[0139] The technical solution implemented in this embodiment can achieve rapid import, buffering, and multi-sided alignment of pages entering the developing chamber within a limited space, reducing tilting and warping, and forming a stacked page sequence with aligned edges and flat surfaces; it improves the positioning stability of subsequent developing / scanning and reduces the probability of jamming and rebound; through adjustable guides and elastic trays, it adapts to different paper thicknesses and page number variations, and the alignment stroke and pressure are controllable, thereby improving the efficiency and consistency of the entire machine's sorting and pre-binding preparation.

[0140] Optionally, retaining member 212 may be a rotatable baffle or a liftable latch;

[0141] The rotatable baffle is pivotally connected to the bearing plate 211 via a hinge seat and a pin.

[0142] The liftable pin is guided to move up and down via a linear guide sleeve and is equipped with a return spring;

[0143] The retaining member 212 is mechanically connected to the electro-actuator 216 via a shift fork, connecting rod, or linear actuator.

[0144] In this embodiment, it should be noted that the retaining member 212 can be either a rotatable baffle or a liftable pin. The rotatable baffle is pivotally connected to the pin shaft via a hinge seat on the support plate 211. The stop edge of the baffle extends out of the paper reference surface in the retained state to form a block, and retracts into (or below) the reference surface in the released state to allow the paper 300 to slide. A washer or bushing can be provided at the hinge to reduce wear and control the swing clearance. The liftable pin achieves axial lifting and lowering through a linear guide sleeve. The guide sleeve is fixed on the support plate 211, and the end of the pin forms a stop head to withstand the downward reaction force of the paper 300. A compression return spring is configured to return the pin to the upper stop position when the power is off or not triggered. Regardless of whether a baffle or a pin is used, it is mechanically connected to the electro-actuator 216 through a fork, connecting rod, or linear push rod to stably transmit the electromagnetic attraction displacement to the retaining member 212. Mechanical limit blocks can be used at the two extreme positions to ensure repeatable positioning and prevent overtravel. To adapt to different paper weights and tilt angles, parameter matching can be achieved by changing the length / mass distribution of the baffle arm or the stiffness and preload of the pin spring.

[0145] The technical solution implemented in this embodiment can: provide two standardized holding types to adapt to different spatial and load conditions, with a universal structure and simple assembly; achieve clear two-position action through hinge or linear guide cooperation, with high repeatability, low wear, and long service life; obtain power failure self-reset and anti-overshoot capability by means of return spring and mechanical limit, improving operational safety and fault tolerance; realize rigid force transmission chain with shift fork / linkage rod / linear push rod, with fast response and low hysteresis, and easy integration with the electric actuator 216; and facilitate rapid calibration for different paper thicknesses, sizes, and tilt angles through adjustable geometric and elastic parameters, enhancing the overall compatibility and reliability of the machine.

[0146] The following is the workflow of the self-service printing device 1000 provided in this application: "Temporary storage of obstructions—Identification and table creation—On-demand release—Job processing", specifically including the following stages:

[0147] S1. Power-on self-test and home reset

[0148] Displacement drive mechanism returns to zero: guide rail, slider, follower platform reset, gripper mechanism opens 420 degrees;

[0149] Release mechanism 400 self-test: Electrical contact 410 elastic travel and contact resistance threshold self-test passed;

[0150] Self-test of bearing unit 210: Keep component 212 in the retention state, and complete the insulation / continuity benchmark test of the conductive bead 213 circuit.

[0151] S2, Paper feed and temporary storage are arranged in rows (forming a shielding arrangement).

[0152] Upstream paper supply (optional stacking mechanism 500): The receiving compartment 510 is aligned with each feeding position one by one, and the release component 530 is opened to drop the paper 300 into the target carrying unit 210.

[0153] The supporting unit 210 is filled sequentially according to the normal direction of the observation window 110, and the tilt angle of the supporting plate 211 makes the paper 300 stable in place by gravity.

[0154] Overlay relationship established: The previous page, which is closer to the viewing window 110, obscures the content area 310 of the subsequent page, with only the side serial number area 320 exposed.

[0155] S3. Side Serial Number Recognition and Mapping Establishment

[0156] The identification component reads the side serial number of each sheet of paper;

[0157] The control module generates a mapping table of "serial number and bearer unit 210 index" as the basis for subsequent addressing and release;

[0158] Dynamic maintenance of the mapping table: The table is automatically updated when a new page is added, and table entries are automatically recycled when a page is removed.

[0159] S4. Release Strategy and Execution

[0160] A. Single-page selection release (exclusively releases a specific page)

[0161] The target carrying unit 210 is determined based on the task (serial number or page number);

[0162] The displacement drive mechanism aligns the gripper mechanism 420 below the unit, and the electrical contact 410 contacts the conductive bead 213 to conduct electricity.

[0163] When the electric actuator 216 of the target bearing unit 210 is energized, the holding member 212 switches from retention to release, and the paper 300 slides out along the bearing plate 211 under the action of gravity and enters the downstream working area.

[0164] B. Continuous segment coordinated release (releasing the entire segment / part at once)

[0165] The first and last pages of the section are determined according to the task, corresponding to the first conductive bead 214 and the last conductive bead 215.

[0166] The paired electrical contacts 410 of the gripper mechanism 420 simultaneously contact and conduct electricity with the first and last conductive beads 213, respectively;

[0167] The circuit bus conductor forms a closed power supply path between the two ends, and the electric actuators 216 of each bearing unit 210 in the section are energized at the same time, keeping the component 212 released synchronously, and the entire page slides into the downstream working area in one go.

[0168] S5. Work Area Processing (Optional Display and Sorting)

[0169] The display unit fine-tunes the homepage position and then displays the image;

[0170] The linear scanner verifies the side serial number;

[0171] The page order sorting mechanism guides the paper into the receiving slot and performs the pressing and aligning action to obtain a stack of paper with aligned edges and flat surfaces;

[0172] Depending on business needs, perform subsequent binding, sealing, or delivery.

[0173] S6. Abnormal and Safety Handling

[0174] Alignment failure or poor contact: fine-tuning of the displacement mechanism will be retried; contact resistance exceeding the limit will trigger an alarm and the mechanism will revert.

[0175] Paper jam / rebound: The inlet anti-rebound component and buffer pad absorb the impact; if it fails, the clearing process is triggered.

[0176] Power failure / emergency stop: The retaining component 212 and the gripper return to a safe state by means of the spring, and the unselected unit continues to be retained.

[0177] S7, Finishing and Standby

[0178] Unreleased pages continue to obscure the layout;

[0179] The gripper mechanism returns to its origin at 420 degrees, and the mapping table and task queue are updated.

[0180] The device enters low-power standby mode, awaiting the next task or batch.

[0181] This process achieves physical obscuring of the content area (310) and long-term visibility of the serial number during the temporary storage stage. It can accurately release single pages and also achieve segmented release through the selection of the first and last two points, completing multi-mode delivery with a limited number of touch points. The overall wiring is simple, the contact is reliable, and the paper path is mainly gravity-driven, with low risk of jamming, meeting the application needs of parallel temporary storage of multiple documents and on-demand output.

[0182] The embodiments described above are merely illustrative of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the scope of protection of this patent application should be determined by the appended claims.

Claims

1. A self-service printing device for printing documents containing a content area and a side serial number area, characterized in that, include: The casing is equipped with an observation window; The temporary storage mechanism, located inside the housing, consists of multiple parallel and inclined support units arranged relative to the horizontal plane. Each support unit is arranged sequentially along the normal direction of the viewing window and is used to support document paper. When viewed along the normal direction of the observation window, the carrying unit located near the observation window and the paper it supports obscure the content area of ​​the paper on the adjacent carrying unit located away from the observation window, while the side serial number area of ​​each paper is exposed. Each support unit includes a support plate, a retaining member, and a conductive bead, wherein the conductive bead and its corresponding support plate and retaining member are disposed in the same support unit; The release mechanism is provided with an electrical contact that aligns with the conductive beads; when the electrical contact makes contact with any conductive bead, the holding member of the corresponding carrier unit of the conductive bead is switched from a retention state to a release state. The retention state is used to block the paper from sliding along the carrier plate, and the release state is used to allow the paper to slide along the carrier plate. The temporary storage mechanism is provided with a loop bus conductor arranged along the arrangement direction of the carrier units; each conductive bead is electrically connected only to the electric actuator of its carrier unit via an independent branch wire; a continuous segment composed of several adjacent carrier units is selected along the arrangement direction of the carrier units, wherein the conductive bead of the carrier unit located near the end of the observation window is defined as the first conductive bead, and the conductive bead of the carrier unit located away from the end of the observation window is defined as the last conductive bead. When the electrical contacts simultaneously make contact with the first and last conductive beads of the continuous section, a closed power supply path is established between the two ends through the circuit bus conductor, so that the electric actuators of each carrying unit in the continuous section are energized at the same time, and their holding components switch synchronously from the retention state to the release state, thereby realizing the linkage release of all pages in the section.

2. The self-service printing device according to claim 1, characterized in that, The release mechanism includes a gripper mechanism, which is located below the bearing unit; The gripper mechanism includes: The claw frame is fixed on the follower platform or base, and its front end is provided with an alignment window. The gripper arms are arranged in pairs and pivotally connected to the gripper frame via a hinge shaft. The gripper arms are provided with anti-slip pads on the inner side and limit blocks on the outer side. The electrical contact is located at the free end of at least one gripper arm, assembled via an insulating base and electrically connected to the lead terminal, and the electrical contact is provided with an elastic compensation spring in the axial direction; A return spring is provided at the root of the gripper arm to keep the gripper open in the released state; The electrical contact is located on the underside of the free end of the gripper arm and tilted upwards, so as to generate a micro-scratching contact when aligned and approaching the target conductive bead.

3. The self-service printing device according to claim 2, characterized in that, The retaining member is provided with: A miniature electromagnetic actuator, comprising a coil frame and a coil assembly fixed to a mounting base on the underside of a support plate; The movable iron core reciprocates in a straight line along the guide hole; The return spring, a compression spring, is sleeved on the guide section of the movable iron core; The force transmission component is a shift fork, eccentric wheel or connecting rod, one end of which is hinged to the movable iron core and the other end is connected to the stop of the retaining component. A mechanical limit block is provided at the two extreme positions of the retaining member; When the electrical contact is connected to the conductive bead, the coil is energized and attracts the movable iron core, which in turn drives the holding member to switch from the retention state to the release state through the force transmission member.

4. The self-service printing device according to claim 3, characterized in that, The release mechanism further includes a displacement driving mechanism, which comprises: Linear guides include guide rails and sliders arranged along the direction of the load-bearing units; The follower platform is rigidly connected to the slider and is used to fix the gripper mechanism; The actuator is a stepper motor coupled with a ball screw mechanism or a synchronous belt drive mechanism; Limit switches or photoelectric sensors are located at both ends of the travel distance; Cable chain or flexible wire harness guide groove, used to restrain cables; The actuator drives the follower stage to move the gripper mechanism between multiple alignment positions.

5. The self-service printing device according to claim 1, characterized in that, It also includes a stack-shifting mechanism, which includes: The receiving compartment has a paper inlet and a paper outlet, and is equipped with a support surface and guide ribs inside. The transfer unit includes a guide and a drive, and the receiving compartment is mounted on a platform that can move along the guide; The release mechanism is located at the bottom of the receiving compartment or at the paper output end. It is a flip-door or sliding door structure and is equipped with a return spring or a return motor. When the receiving compartment is in the delivery position, the release component opens the support surface to release the paper.

6. The self-service printing device according to claim 5, characterized in that, The temporary storage mechanism is located below the movement range of the receiving compartment and is provided with a docking interface, the docking interface including: The alignment component is located at the paper output end of the receiving compartment and the feed side of the temporary storage mechanism, and is a positioning pin that engages with a positioning hole or a cone that engages with a recess. A material guiding component is provided on the feeding side of the temporary storage mechanism, including a downwardly curved inward guiding lip and a guiding groove surface connected thereto.

7. The self-service printing device according to claim 1, characterized in that, It also includes a display chamber, which comprises: Metal frame; The document card slot is located within the frame and consists of a transparent side panel and a bottom positioning block; The head mounting plate is located in front of the slot and is connected to the frame via a slide rail and a screw and nut mechanism. The linear scanner bracket is located on the side of the slot, and an optical window or light guide mounting position is provided in front of it.

8. The self-service printing device according to claim 7, characterized in that, The imaging chamber is equipped with a page order sorting mechanism, including: The guiding component is a guide plate or a guide roller; The receiving groove is a U-shaped groove or a box-shaped groove, with an elastic support plate at the bottom and a limiting edge at the groove opening; The clamping component includes a clamping plate and a drive mechanism mounted on a linear guide pair.

9. The self-service printing device according to claim 1, characterized in that, The retaining member is a rotatable baffle or a liftable pin; The rotatable baffle is pivotally connected to the bearing plate via a hinge seat and a pin. The liftable pin is guided to move up and down via a linear guide sleeve and is equipped with a return spring; The retaining member is mechanically connected to the electro-actuator via a fork, connecting rod, or linear push rod.

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