A printer

Abstract

The present invention discloses a printer. The printer main body is formed with a paper feeding channel; a PCB board is disposed on the printer main body and has a paper jamming detection circuit; an intermediate component is disposed on the printer main body and is electrically connected to the detection circuit; a trigger component is electrically connected to the detection circuit, and the trigger component further includes a movable part located in the paper feeding channel; the movable part is configured to be pushed by the paper and contact the intermediate component when paper jams in the paper feeding channel, so as to conduct the detection circuit. The CB board has a paper jamming detection circuit. When paper jams in the paper feeding channel, the movable part of the trigger component can be pushed by the paper and contact the intermediate component to conduct the detection circuit. After the PCB main board obtains the paper jamming signal, it judges that paper jams and performs subsequent actions. The structure and principle are relatively simple, the concept is novel, the number of components is small, and the cost is low. Moreover, the requirement for the placement of the spatial position is relatively low.

Description

Technical Field

[0001] The present invention relates to a printer. Background Art

[0002] Currently, the commonly used printer mainly guides the printing roll paper from the printing roll paper to the paper outlet through a paper winding roller. When there is a paper feeding problem or paper jamming during printing, the paper gets stuck at the paper outlet, but the printer still continues to work and cannot stop automatically, wasting paper and even damaging the printer.

[0003] Or, as in the Chinese utility model patent application No. 201921966613.5, with the patent name of a thermal printer having a paper jamming detection function, which includes a base, a paper cover, and a panel. There is a paper outlet between the base and the panel. A fixing plate is provided at the bottom of the panel. A paper jamming detection board is provided at one end of the panel close to the paper outlet. The paper jamming detection board is hingedly connected to the panel. A torsion spring is provided at the top of the paper jamming detection board. The two ends of the torsion spring are respectively stuck on the bottom of the fixing plate and the side wall of the paper jamming detection board close to the fixing plate, so that the paper jamming detection board will be pressed towards the fixing plate only when the torsion force received is greater than that of the torsion spring. A photoelectric switch is provided at the bottom of the fixing plate. When the paper jamming detection board is pressed towards the fixing plate and passes through the photoelectric switch, the photoelectric switch senses the paper jamming detection board and transmits a signal to the control panel of the thermal printer to control the thermal printer to stop. For this kind of printer with a paper jamming detection function, it is necessary to specially design a space to install and support the photoelectric pair and the paper jamming detection board, and design wires to connect the photoelectric pair to the circuit board. This method is inconvenient for installation and has high requirements for the placement of the space position. Summary of the Invention

[0004] The present invention provides a printer, which overcomes the deficiencies of the background art. One of the technical solutions adopted by the present invention to solve its technical problems is:

[0005] A printer, comprising:

[0006] A printer main body, forming a paper feeding channel;

[0007] A PCB board, supported on the printer main body and having a paper jamming detection circuit; and

[0008] A paper jamming trigger mechanism, comprising:

[0009] An intermediate component, disposed on the printer main body and electrically connected to the detection circuit; and

[0010] A trigger component, electrically connected to the detection circuit. The trigger component further includes a movable part located in the paper feeding channel. The movable part is configured to be pushed by the paper and contact the intermediate component when there is a paper jam in the paper feeding channel, so as to conduct the detection circuit.

[0011] In a preferred embodiment, it further includes a print head and a pressure roller, and the pressure roller transports the printing paper clamped between the print head and the pressure roller by rotation.

[0012] In a preferred embodiment, it further includes a paper cutting mechanism, the paper cutting mechanism is arranged on the downstream side of the print head, and the movable part is arranged between the print head and the paper cutting mechanism.

[0013] In a preferred embodiment, the printer further includes a force applying component, the print head is swingably supported on the printer main body, the force applying component is arranged between the print head and the printer main body and applies a force to the print head in the direction of the pressure roller, and the intermediate component includes a metal limiting rod supported on the printer main body for limiting the swing amplitude of the print head.

[0014] In a preferred embodiment, the printer main body includes a metal frame, and the metal limiting rod is electrically connected to the detection circuit on the PCB board through the metal frame.

[0015] In a preferred embodiment, the printer main body is further provided with an electrical isolation component and a metal connection component, the triggering component is supported on the printer main body through the electrical isolation component, and is electrically connected to the detection circuit through the metal connection component; wherein, the metal connection component includes a wire, a flexible circuit board or a first metal structural member that does not contact the printer main body.

[0016] In a preferred embodiment, the print head is electrically connected to the detection circuit, and the intermediate component further includes a second metal structural member fixed on the print head, and the second metal structural member is electrically connected to the metal part on the print head for electrical connection with the detection circuit.

[0017] In a preferred embodiment, the triggering component is a conductive elastic sheet, the conductive elastic sheet includes a straight section and a bent section, the straight section is connected to the PCB main board, and the bent section surrounds the outer periphery of the intermediate component.

[0018] In a preferred embodiment, the detection circuit includes a sensor, a signal providing module and a signal changing module, the signal providing module is electrically connected to the sensor to provide a first signal for the sensor, the triggering component is electrically connected to the signal providing module, and the intermediate component is electrically connected to the signal changing module;

[0019] When the triggering component contacts the intermediate component, the signal providing module connects the signal changing module and switches the first signal to a second signal to provide to the sensor.

[0020] In a preferred embodiment, the signal changing module is a ground wire for conducting away the static electricity on the intermediate component.

[0021] The second technical solution adopted by the present invention to solve its technical problems is as follows:

[0022] A printer, comprising:

[0023] A printer main body, formed with a paper feed channel;

[0024] A PCB board, disposed on the printer main body and having a paper jam detection circuit; and

[0025] A paper jam triggering mechanism, comprising:

[0026] An intermediate member, disposed on the printer main body and electrically connected to the detection circuit;

[0027] A fixing member, disposed on the printer main body and electrically connected to the detection circuit; and

[0028] A triggering member, including a force-receiving portion located in the paper feed channel;

[0029] The force-receiving portion is configured to be pushed by the paper when a paper jam occurs in the paper feed channel, and the triggering member can move and contact the intermediate member and the fixing member when the force-receiving portion is pushed, so as to conduct the detection circuit.

[0030] In a preferred embodiment, the detection circuit includes a sensor, a signal providing module, and a signal changing module. The signal providing module is electrically connected to the sensor to provide a first signal to the sensor. The fixing member is electrically connected to the signal providing module, and the intermediate member is electrically connected to the signal changing module;

[0031] When the triggering member contacts the fixing member and the intermediate member, the signal providing module connects the signal changing module to switch the first signal to a second signal and provide it to the sensor;

[0032] Wherein, the signal changing module is a ground wire for leading away the static electricity on the intermediate member.

[0033] Compared with the background technology, this technical solution has the following advantages:

[0034] 1. The PCB board has a paper jam detection circuit. When a paper jam occurs in the paper feed channel, the movable part of the triggering member can be pushed by the paper and contact the intermediate member to conduct the detection circuit. After the PCB main board obtains the paper jam signal, it judges that a paper jam has occurred and performs subsequent actions. The structure and principle are relatively simple, the concept is novel, the components are few, and the cost is low. Moreover, there is no need to specifically design a space to install and support the photoelectric pair and the paper jam detection board, nor is it necessary to design wires to connect the photoelectric pair to the circuit board, and the requirements for the placement of the space position are relatively low.

[0035] 2 Since the paper cutting mechanism is arranged on the downstream side of the print head, and the movable part is arranged between the print head and the paper cutting mechanism, when paper jams occur, the distance between the folded paper and the movable part is relatively close. The paper only needs to move a short distance to push against the movable part to make it move, with higher accuracy.

[0036] 3. The triggering component is connected to the high level of the detection circuit, and the intermediate component is connected to the ground of the detection circuit. When the movable part of the triggering component contacts the intermediate component, the high level is grounded and pulled down to a low level. The implementation method in the circuit part is relatively convenient and can be achieved without making too many changes to the structure of the PCB board, reducing costs.

[0037] 4. The intermediate component includes a metal limit rod supported on the printer main body for restricting the swing amplitude of the print head. That is, the metal limit rod is the limit structure of the printer itself. Using the existing structure of the printer as the structure of the intermediate component does not require adding new components, ensuring that the size of the printer will not increase additionally.

[0038] 5. The metal limit rod is electrically connected to the detection circuit on the PCB board through the metal frame. That is, the metal limit rod also conducts electricity through the metal frame required by the printer itself, without increasing the size of the printer additionally.

[0039] 6. The triggering component is supported on the printer main body through an electrical isolation component, which can isolate the triggering component from the printer main body to prevent the triggering component from directly contacting the intermediate component and causing a short circuit phenomenon.

[0040] 7. The print head is electrically connected to the detection circuit, and the second metal structure of the intermediate component is electrically connected to the metal part on the print head for electrical connection with the detection circuit. That is, the intermediate component is indirectly electrically connected to the PCB board through the print head, providing a new connection method.

[0041] 8. The signal change module is the ground wire used to conduct away the static electricity on the intermediate component. That is, the intermediate component has not only the function of detecting paper jams but also the function of conducting static electricity. Description of the Drawings

[0042] The following further illustrates the present invention in conjunction with the drawings and embodiments.

[0043] Figure 1 Shows a cross-sectional schematic view when the movable part and the intermediate component are separated in an embodiment.

[0044] Figure 2 Shows a cross-sectional schematic view when the movable part and the intermediate component are in contact in an embodiment.

[0045] Figure 3 ShowsFigure 1 Partial enlarged schematic view.

[0046] Figure 4 Illustrates Figure 2 Partial enlarged schematic view.

[0047] Figure 5 Assembly schematic view of the electrical isolation member, the movable part and the intermediate member in an embodiment.

[0048] Figure 6 Circuit structure schematic view of the detection circuit in an embodiment.

[0049] Figure 7 Schematic view of the state where the trigger member does not contact the fixed member and the intermediate member in another embodiment.

[0050] Figure 8 Schematic view of the state where the trigger member contacts the fixed member and the intermediate member in another embodiment. Detailed implementation manners

[0051] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "first", "second" or "third", etc., are for distinguishing different objects, rather than for describing a specific order.

[0052] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, for orientation terms, when using terms such as "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. to indicate the orientation or position relationship, it is based on the orientation and position relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, so it cannot be understood as limiting the specific protection scope of the present invention.

[0053] In the claims, the description and the above-mentioned drawings of the present invention, unless otherwise clearly defined, when using terms such as "fixed connection", "fixedly connected", should be understood in a broad sense, that is, any connection method without displacement relationship and relative rotation relationship between the two, that is, including non-detachable fixed connection, detachable fixed connection, being integrally connected and being fixedly connected through other devices or elements.

[0054] In the claims, the description and the above-mentioned drawings of the present invention, when using terms such as "comprising", "having" and their variants, are intended to mean "including but not limited to".

[0055] Please refer to Figures 1 to 6, a preferred embodiment of a printer, said printer comprising a printer main body 10 provided with a printing channel 1, a PCB board 80, and a paper jamming triggering mechanism.

[0056] The printer main body 10 forms a paper feeding channel 1.

[0057] The printer further comprises a print head 90 and a pressure roller 91, and the pressure roller 91 transports and clamps the printing paper between the print head 90 and the pressure roller 91 by rotation. Moreover, the printer further comprises a paper cutting mechanism 92, and the paper cutting mechanism 92 is disposed on the downstream side of the print head 90, that is, near the outlet of the paper feeding channel 1.

[0058] In this embodiment, the printer main body 10 comprises a housing 12 and a metal frame 13, and the metal frame 13 is fixedly connected inside the housing 12. The print head 90, the pressure roller 91, the PCB board 80, and the paper cutting mechanism 92 are installed on the metal frame 13. Among them, the PCB board 80 is fixedly installed on the metal frame 13 by screws, and the screws are connected to the grounding circuit configured on the PCB board 80.

[0059] In this embodiment, the printer further comprises a biasing member. The print head 90 is swingably supported on the printer main body 10, and the biasing member is disposed between the print head 90 and the printer main body 10 and biases the print head 90 in the direction of the pressure roller 91. Specifically, as Figure 5 shown, the biasing member is a spring 93.

[0060] The PCB board 80 is disposed on the printer main body 10 and has a paper jamming detection circuit.

[0061] The paper jamming triggering mechanism includes an intermediate member and a triggering member.

[0062] The intermediate member is disposed on the printer main body 10 and is electrically connected to the detection circuit. In this embodiment, the intermediate member includes a metal limiting rod 30 supported on the printer main body 10 for limiting the swing amplitude of the print head 90. That is, the metal limiting rod 30 is a limiting structure of the printer itself, and the existing structure of the printer is used as the structure of the intermediate member without adding new components, ensuring that the size of the printer will not increase additionally.

[0063] In this embodiment, as Figure 5As shown, the metal limit rod 30 is electrically connected to the detection circuit on the PCB board 80 through the metal frame 13. Specifically, the detection circuit of the PCB board 80 is provided with a grounding terminal, and the metal limit rod 30 is connected to the grounding terminal of the detection circuit of the PCB board 80. As required, the structure of the metal limit rod 30 can be maintained, and the intermediate member can also be additionally provided with a grounding rod, which is connected to the grounding terminal of the detection circuit of the PCB board 80.

[0064] The trigger member is electrically connected to the detection circuit. The trigger member includes a movable part located in the paper feed channel 1; the movable part is configured to be pushed by the paper and contact the intermediate member when paper jams in the paper feed channel 1 to conduct the detection circuit. In this embodiment, the movable part is arranged between the print head 90 and the paper cutting mechanism 92.

[0065] In this embodiment, as Figure 3 shown, the trigger member is a conductive elastic sheet 20. The conductive elastic sheet 20 includes a straight section 21 and a bent section 22. The straight section 21 is connected to the PCB main board 80, and the bent section 22 is the movable part. The bent section 22 is provided with a guiding inclined surface 23 towards the outlet of the printing channel 1. The bent section 22 surrounds the outer periphery of the metal limit rod 30.

[0066] In this embodiment, the printer main body 10 is further provided with an electrical isolation member 11 and a metal connecting member (not shown in the figure). The trigger member is supported on the printer main body 10 through the electrical isolation member 11, and is electrically connected to the detection circuit through the metal connecting member; wherein, the metal connecting member includes a wire, a flexible circuit board or a first metal structural member that does not contact the printer main body. In this embodiment, the electrical isolation member 11 uses an insulating board to isolate the conductive elastic sheet 20 from the metal frame 13.

[0067] In one embodiment, the print head 90 is electrically connected to the grounding circuit of the detection circuit. The intermediate member further includes a second metal structural member fixed on the print head 90, and the second metal structural member is electrically connected to the metal part on the print head 90 for electrically connecting to the detection circuit. Specifically, the print head includes a thermal head, a thermal head support member and a circuit adapter board. The thermal head is electrically connected to the circuit adapter board. There is a line connected to the grounding circuit on the PCB board on the circuit adapter board or the thermal head. The thermal head, the circuit adapter board and the thermal head support member are connected to the above-mentioned line for connecting to the grounding circuit through riveting / screwing / welding to achieve the purpose of conducting static electricity. The second metal structural member is connected to the thermal head support member to connect to the grounding circuit through the thermal head support member. Among them, the thermal head support member is made of metal material.

[0068] That is, the metal limit rod 30 is connected to the detection circuit through the second metal structure member and the print head 90, and the structures of the second metal structure member and the first metal structure member can be the same.

[0069] In this embodiment, the detection circuit includes a sensor 50, a signal providing module 51, and a signal changing module 52. The signal providing module 51 is electrically connected to the sensor 50 to provide a first signal to the sensor 50. The triggering component is electrically connected to the signal providing module 51, and the intermediate component is electrically connected to the signal changing module 52. When the triggering component contacts the intermediate component, the signal providing module 51 connects the signal changing module 52 and switches the first signal to a second signal to provide to the sensor.

[0070] In this embodiment, as Figure 6 shown, the signal changing module 52 is a ground wire and is connected to the ground terminal of the PCB board 80 to conduct away the static electricity on the intermediate component. That is, in addition to the function of detecting paper jams, the intermediate component also has the function of conducting static electricity. The signal providing module 51 includes a high-level input terminal, which is connected to the sensor 50 through two resistors 60 and 70. The detection circuit further includes a connector 40. The connector 40 has a first pin and a second pin. The signal providing module 51 and the conductive elastic sheet 20 are both connected to the first pin, and the signal changing module 52 and the metal limit rod 30 are both connected to the second pin.

[0071] Thus, as Figure 3 shown, when the paper feed channel 1 is not jammed, the bent section 22 of the conductive elastic sheet 20 does not contact the metal limit rod 30. At this time, the detection circuit is in an open state, and the sensor 50 always receives the first signal of no paper jam and does not receive the second signal of paper jam;

[0072] As Figure 4 shown, when the paper feed channel 1 is jammed, the paper will abut against the bent section 22 of the conductive elastic sheet 20 and continue to abut against the bent section 22 along the guiding inclined surface 23 until the bent section 22 contacts the metal limit rod 30. At this time, the signal providing module 51 connects the signal changing module 52 and switches the first signal to a second signal to provide to the sensor 50. That is, this second signal is the signal for the detection circuit to be turned on and is also a ground signal.

[0073] In another embodiment, different from the above embodiment: In this embodiment, as Figure 7 and Figure 8As shown, a fixing component 100 is arranged on the printer main body. The fixing component 100 is made of a metal material, supported on an insulating component, and installed on the printer main body through the insulating component. The fixing component 100 is electrically connected to the signal providing module of the detection circuit through a wire, a flexible circuit board or a rigid metal structure. The triggering component includes a force-receiving part 200. At least part of the force-receiving part 200 is arranged in the paper feed channel 1. When paper jams in the paper feed channel 1, the triggering component moves when the force-receiving part 200 is pushed by the paper, and can be engaged with the intermediate component 300 and the fixing component 100 to conduct the signal providing module 51 and the signal changing module 52, thereby triggering a change in the signal received by the sensor.

[0074] In another embodiment, the triggering component includes a metal component movably arranged on the printer main body and a movable component having a force-receiving part located in the paper feed channel. The movable component moves when pushed by the paper during paper jamming, and further pushes the metal component to move, so that it is engaged with the intermediate component and the fixing component to conduct the signal providing module 51 and the signal changing module 52, thereby triggering a change in the signal received by the sensor.

[0075] The above is only a preferred embodiment of the present invention, and thus the scope of implementation of the present invention cannot be limited thereby. That is, equivalent changes and modifications made according to the scope of the present invention patent and the content of the specification should still fall within the scope covered by the present invention.

Claims

1. A printer, characterized in that, Comprising: A printer main body, formed with a paper feed path; A PCB board, disposed on the printer main body and having a paper jam detection circuit; and A paper jam trigger mechanism, comprising: An intermediate member, supported on the printer main body and electrically connected to the detection circuit; and A trigger member, electrically connected to the detection circuit, and the trigger member further includes a movable portion located in the paper feed path; The movable portion is configured to be pushed by the paper and contact the intermediate member when a paper jam occurs in the paper feed path, so as to conduct the detection circuit; The printer further includes a print head, the print head is swingably supported on the printer main body, and the intermediate member includes a metal limit rod supported on the printer main body for limiting the swing amplitude of the print head.

2. The printer according to claim 1, characterized in that: It further includes a pressure roller, and the pressure roller transports the printing paper clamped between the print head and the pressure roller by rotation.

3. The printer according to claim 2, characterized in that: It further includes a paper cutting mechanism, the paper cutting mechanism is disposed on the downstream side of the print head, and the movable portion is disposed between the print head and the paper cutting mechanism.

4. A printer according to claim 2, characterized in that: The printer further includes a biasing member, the biasing member is disposed between the print head and the printer main body and applies a force to the print head in the direction of the pressure roller.

5. A printer according to claim 4, characterized in that: The printer main body includes a metal frame, and the metal limit rod is electrically connected to the detection circuit on the PCB board through the metal frame.

6. A printer according to claim 5, characterized in that: The printer main body is further provided with an electrical isolation member and a metal connection member, the trigger member is supported on the printer main body through the electrical isolation member, and is electrically connected to the detection circuit through the metal connection member; wherein, the metal connection member includes a wire, a flexible circuit board or a first metal structural member that does not contact the printer main body.

7. A printer according to claim 2, characterized in that: The print head is electrically connected to the detection circuit, and the intermediate member further includes a second metal structural member fixed on the print head, and the second metal structural member is electrically connected to the metal portion on the print head for electrically connecting to the detection circuit.

8. A printer according to claim 1, characterized in that: The trigger member is a conductive elastic sheet, the conductive elastic sheet includes a straight section and a bent section, the straight section is electrically connected to the PCB main board, the bent section surrounds the outer periphery of the intermediate member, and the bent section is pushed and contacts the intermediate member during a paper jam.

9. A printer according to any one of claims 1 - 8, characterized in that: The detection circuit includes a sensor, a signal providing module and a signal changing module, the signal providing module is electrically connected to the sensor to provide a first signal for the sensor, the trigger member is electrically connected to the signal providing module, and the intermediate member is electrically connected to the signal changing module; When the trigger member contacts the intermediate member, the signal providing module connects the signal changing module to switch the first signal to a second signal and provide it to the sensor.

10. A printer according to claim 9, characterized in that: The signal changing module is a grounding circuit for conducting away the static electricity on the intermediate member.

11. A printer, characterized in that, Comprising: A printer main body, formed with a paper feed path; A PCB board, disposed on the printer main body and having a paper jam detection circuit; And A paper jam trigger mechanism, comprising: An intermediate member, disposed on the printer main body and electrically connected to the detection circuit; A fixing member, disposed on the printer main body and electrically connected to the detection circuit; and A trigger member, including a force-receiving portion located in the paper feed path; The stressed part is configured to be pushed by the paper when paper jams in the paper feed path, and the trigger component can move and contact the intermediate component and the fixed component when the stressed part is pushed, so as to conduct the detection circuit.

12. The printer according to claim 11, characterized in that, The detection circuit includes a sensor, a signal providing module and a signal changing module. The signal providing module is electrically connected to the sensor to provide a first signal for the sensor. The fixed component is electrically connected to the signal providing module, and the intermediate component is electrically connected to the signal changing module; When the trigger component contacts the fixed component and the intermediate component, the signal providing module connects the signal changing module to switch the first signal to a second signal and provide it to the sensor; Wherein, the signal changing module is a ground wire for leading away the static electricity on the intermediate component.

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