Automatic paper cutting thermal printer capable of preventing cutter from being stuck due to mistaken cover opening

Abstract

The utility model discloses an automatic paper cutting thermal printer capable of preventing a cutter from being stuck due to mistaken opening of a cover, and the automatic paper cutting thermal printer can prevent the cutter from being stuck due to mistaken opening of the cover when a cover plate is buckled and the thermal printer works, a baffle block and a blocking piece are adjusted to move, so that the baffle block moves to the position under a movable block, and the movable block is blocked. When the cover plate needs to be opened, the check block and the blocking piece are adjusted to move, the check block is not located under the movable block any more, and therefore the cover plate cannot be opened by pressing the cover opening button, the situation that the cover plate bounces off due to the fact that people press the cover opening button by mistake is effectively prevented, and the cutter blocking fault is effectively avoided; and conversely, when the cover plate needs to be opened, the check block and the blocking piece are adjusted to move, and the check block is not located under the movable block any more. Meanwhile, the blocking piece moves to the position between the correlation light sources to cut off light source signals, then the cut-off signals are fed back to the controller, the controller controls the motor not to be started any more, and therefore it is guaranteed that the cutter does not move, the cutter clamping fault when the cover plate is opened is prevented, and meanwhile it is guaranteed that the cutter does not move to hurt the human hands when people cover the cover plate subsequently.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal printers, in particular to an automatic paper-cutting thermal printer which can prevent a knife from being stuck due to accidental cover opening. Background Art

[0002] Thermal printers usually include a printing module and a cutter module, which can print receipts and labels. The printing paper is automatically cut after the printing task is completed. During use, it is often necessary to open the cover to replace the printing paper.

[0003] The existing Chinese utility model patent with announcement number CN214821934U published on November 23, 2021 discloses a thermal printer that is easy to open the cover. When the flip cover does not need to be opened, the other end of the flip cover is clamped in the elastic locking mechanism, and the flip cover remains in a closed state; when the flip cover needs to be opened, the button is pressed downward, so that the pressing lever rotates around the protrusion, that is, the cross bar moves downward, and the other ends of the two support legs move upward. At this time, the other ends of the support legs push up the thrust support on the flip cover, so that the other end of the flip cover disengages from the elastic locking mechanism, and the flip cover automatically opens under the tension of the torsion spring; after putting in the printing paper, the flip cover is buckled, and the pressing lever is reset under the action of the spring, and will not push the thrust support, so that the other end of the flip cover remains clamped in the elastic locking mechanism, and the flip cover remains closed; the user only needs to use one hand to operate to open the flip cover, which is convenient for user operation, and the pressing feel is good, the button is not easy to be damaged, and the service life of the printer is improved.

[0004] However, this thermal printer does not have any safety protection mechanism. When people accidentally press the button switch, the flip cover will pop open, causing the cutter to jam. When people subsequently try to close the flip cover, the cutter may cut the paper and cause injury to the hands, posing a certain safety hazard. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology, the utility model provides an automatic paper cutting thermal printer that can prevent the cover from being accidentally opened and causing the cutter to jam, so as to solve the problem that the existing thermal printers are not equipped with any safety protection mechanism. When people accidentally press the button switch, the flip cover will pop open, causing the cutter to jam. When people subsequently try to close the flip cover, the cutter may start cutting paper and cause injury to the human hand, which poses certain safety hazards.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: an automatic paper-cutting thermal printer capable of preventing knife jams caused by accidental cover opening, comprising a body, a cover-opening mechanism provided on the body, the cover-opening mechanism including a cover-opening button, a cover plate hingedly connected to the top surface of the body, a paper-cutting mechanism provided within the cover plate, the paper-cutting mechanism including a motor and a cutter, a paper outlet between the cover plate and the body, and the automatic paper-cutting thermal printer further comprising:

[0007] A PCB board, wherein the PCB board is fixedly arranged in the cover plate;

[0008] An optocoupler device, wherein the optocoupler device has an opposing light source, the optocoupler device is fixed to a PCB board, and the optocoupler device signal is connected to the PCB board;

[0009] A stopper, the stopper being slidably arranged on a side of the cover plate facing the cover opening button;

[0010] A movable block, the movable block being fixedly arranged on a side of the cover opening button facing the cover plate;

[0011] Controller, the PCB board signal is connected to the controller, and the controller signal is connected to the motor;

[0012] a blocking member movably disposed in the cover plate;

[0013] When the stopper moves to be located directly below the movable block, the cover opening button and the cover plate are both in a locked state; when the blocking member moves to be located between the opposing light sources of the optocoupler device, the cover opening button and the cover plate are both in an unlocked state.

[0014] Preferably, a sliding groove is provided on the top surface of the cover plate, a shift block is slidably provided in the sliding groove, the bottom of the shift block is fixedly connected to the connecting rod, the bottom end of the connecting rod is fixedly connected to the connecting plate, and the block and the blocking member are both fixedly connected to the connecting plate.

[0015] Preferably, a second hook plate is fixedly installed on one side of the bottom of the connecting plate, and a first hook plate is provided on the machine body. When the first hook plate and the second hook plate are locked, the cover opening button and the cover plate are both in a locked state.

[0016] Preferably, the second hook plate includes a second transverse plate, and the first hook plate includes a first transverse plate. When the cover opening button and the cover plate are both in a locked state, the first hook plate and the second hook plate are locked, and the bottom surface of the first transverse plate and the top surface of the second transverse plate are in contact. When the cover opening button and the cover plate are both in an unlocked state, the first hook plate and the second hook plate are not in contact.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] When the cover is buckled and the thermal printer is working, the stopper and the blocking member are adjusted to move so that the stopper moves to just below the movable block, thereby limiting the movement of the movable block and making it impossible to press the cover opening button to open the cover, effectively preventing people from accidentally pressing the cover opening button to cause the cover to pop open, thereby effectively avoiding the cutter jamming failure. Conversely, when the cover needs to be opened, the stopper and the blocking member are adjusted to move so that the stopper is no longer just below the movable block, and at the same time the blocking member moves to between the opposing light sources to cut off the light source signal, and then the cut-off signal is fed back to the controller, and the controller controls the motor to stop starting, thereby ensuring that the cutter does not move, preventing the cutter jamming failure when the cover is opened. At the same time, when people subsequently close the cover, it is ensured that the cutter does not move to cause injury to people's hands, thereby avoiding safety hazards. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structural positions of the shift block, the stop block, and the second hook plate when the cover opening button and the cover plate are both in the unlocked state;

[0021] Figure 3 This is a schematic diagram of the structural positions of the shift block, the stop block, and the second hook plate when the cover opening button and the cover plate are both in the locked state;

[0022] Figure 4 This is a schematic diagram of the structural position of the blocking member and the optical coupling device when the cover opening button and the cover plate of the utility model are both in the locked state;

[0023] Figure 5 This is a schematic diagram of the structural cover and paper cutting mechanism of the utility model;

[0024] Among them: 1. Machine body; 11. First hook plate; 2. Cover plate; 21. Slide slot; 3. Paper outlet; 4. Cover opening button; 41. Movable block; 5. Shift block; 51. Connecting rod; 6. Connecting plate; 61. Stop block; 62. Blocking member; 63. Second hook plate; 7. Paper cutting mechanism; 71. Motor; 8. PCB board; 9. Optocoupler device. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific embodiments. However, the following embodiments are only preferred embodiments of the present invention, not all of them. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without making any creative work shall fall within the scope of protection of the present invention.

[0026] like Figure 1-Figure 5As shown, the utility model provides an automatic paper-cutting thermal printer that can prevent the knife from being jammed due to accidental cover opening, comprising a body 1, a cover-opening mechanism provided on the body 1, the cover-opening mechanism including a cover-opening button 4 (specifically, the principle of the cover-opening mechanism opening the cover by pressing the cover-opening button 4 is prior art and will not be described in detail here), a cover plate 2 is hingedly connected to the top surface of the body 1, a paper-cutting mechanism 7 is provided inside the cover plate 2, the paper-cutting mechanism 7 includes a motor 71 and a cutter (specifically, the principle of the paper-cutting mechanism driving the cutter to cut paper by the motor 71 is prior art and will not be described in detail here), a paper outlet 3 is provided between the cover plate 2 and the body 1, and the automatic paper-cutting thermal printer further comprises: a PCB board 8, an optocoupler device 9 (i.e., a photoelectric coupler, which is a prior art structure), a stopper 61, a movable block 41, a controller, and a blocking member 62;

[0027] The PCB board 8 is fixedly arranged in the cover plate 2;

[0028] The optocoupler 9 has a corresponding light source, is fixed on the PCB board 8, and has a signal connection to the PCB board 8;

[0029] The stopper 61 is slidably arranged on the side of the cover plate 2 facing the cover opening button 4;

[0030] The movable block 41 is fixedly arranged on the side of the cover opening button 4 facing the cover plate 2;

[0031] The PCB board 8 signal is connected to the controller, and the controller signal is connected to the motor 71;

[0032] The blocking member 62 is movably disposed in the cover plate 2;

[0033] When the stopper 61 moves to be located directly below the movable block 41, the cover opening button 4 and the cover plate 2 are both in a locked state; when the blocking member 62 moves to be located between the opposing light sources of the optical coupler 9, the cover opening button 4 and the cover plate 2 are both in an unlocked state;

[0034] When the cover 2 is buckled and the thermal printer is working, the block 61 and the blocking member 62 are adjusted to move so that the block 61 moves to the bottom of the movable block 41, so that the block 61 limits the movement of the movable block 41. At this time, the cover opening button 4 and the cover 2 are both in a locked state (such as Figure 3 As shown), the cover plate 2 cannot be opened by pressing the cover opening button 4, effectively preventing people from accidentally pressing the cover opening button 4 and causing the cover plate 2 to pop open, thereby effectively avoiding the cutter jamming failure. At this time, the blocking member 62 is not between the opposing light sources, and the controller can control the motor 71 to perform normal paper cutting work;

[0035] On the contrary, when the cover 2 needs to be opened, the stopper 61 and the blocking member 62 are adjusted to move so that the stopper 61 is no longer located directly below the movable block 41. At this time, the cover opening button 4 and the cover 2 are both in the unlocked state (e.g. Figure 2As shown), at the same time, the blocking member 62 moves to between the opposite light sources to cut off the light source signal, and then feeds the cut-off signal back to the controller, which controls the motor 71 to stop starting, thereby ensuring that the cutter does not move, preventing the cutter from getting stuck when the cover 2 is opened. At the same time, when people subsequently close the cover 2, it is ensured that the cutter does not move and cause damage to people's hands, thereby avoiding safety hazards.

[0036] like Figure 1-Figure 4 As shown, the top surface of the cover plate 2 is provided with a slide groove 21, a shift block 5 is slidably provided in the slide groove 21, the bottom of the shift block 5 is fixedly connected to the connecting rod 51, the bottom end of the connecting rod 51 is fixedly connected to the connecting plate 6, and the stopper 61 and the blocking member 62 are both fixedly connected to the connecting plate 6;

[0037] By fixing the stopper 61 and the blocking member 62 to the connecting plate 6, when the shifting block 5 is pushed to slide in the sliding groove 21, the shifting block 5 can drive the connecting rod 51 to slide in the cover plate 2, and the connecting rod 51 drives the connecting plate 6 to slide in the cover plate 2, so that the stopper 61 and the blocking member 62 can move synchronously.

[0038] like Figure 2 and Figure 3 As shown, a second hook plate 63 is fixedly installed on one side of the bottom of the connecting plate 6, and a first hook plate 11 is provided on the body 1. When the first hook plate 11 and the second hook plate 63 are locked, the cover opening button 4 and the cover plate 2 are both in a locked state;

[0039] Specifically, the second hook plate 63 includes a second vertical plate and a second horizontal plate, and the first hook plate 11 includes a first vertical plate and a first horizontal plate. The first horizontal plate and the second horizontal plate are arranged opposite each other. When the cover opening button 4 and the cover plate 2 are both in the locked state, the first hook plate 11 and the second hook plate 63 are locked, and the bottom surface of the first horizontal plate and the top surface of the second horizontal plate are in contact. When the cover opening button 4 and the cover plate 2 are both in the unlocked state, the first hook plate 11 and the second hook plate 63 do not contact each other.

[0040] When the toggle block 5 slides in the chute 21, the connecting plate 6 moves close to the cover opening button 4, and the connecting plate 6 drives the second hook plate 63 to move close to the first hook plate 11. When the stopper 61 moves to the bottom of the movable block 41, the cover opening button 4 and the cover plate 2 are both in a locked state. At this time, the second horizontal plate of the second hook plate 63 moves to the bottom of the first horizontal plate of the first hook plate 11 (as shown in FIG. Figure 3 As shown), thereby further preventing the cover plate 2 from being opened by mistake by pressing the cover opening button 4;

[0041] On the contrary, when the toggle block 5 slides in the slide groove 21, the connecting plate 6 moves away from the cover button 4, and the connecting plate 6 drives the second hook plate 63 to move away from the first hook plate 11. When the stopper 61 moves and the position of the movable block 41 is staggered up and down, left and right, the cover button 4 and the cover plate 2 are both in the unlocked state. At this time, the second horizontal plate of the second hook plate 63 and the first horizontal plate of the first hook plate 11 are also staggered up and down, left and right (such as Figure 3As shown), the first hook plate 11 and the second hook plate 63 do not contact during the flipping process of the cover plate 2, thereby ensuring that the cover plate 2 is flipped open normally.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automatic paper cutting thermal printer capable of preventing the cover from being accidentally opened and causing the cutter to jam, comprising a body (1), a cover opening mechanism provided on the body (1), the cover opening mechanism including a cover opening button (4), a cover plate (2) hingedly connected to the top surface of the body (1), a paper cutting mechanism (7) provided inside the cover plate (2), the paper cutting mechanism (7) including a motor (71) and a cutter, a paper outlet (3) provided between the cover plate (2) and the body (1), and characterized in that: The automatic paper cutting thermal printer also includes: A PCB board (8), wherein the PCB board (8) is fixedly arranged in the cover plate (2); An optical coupler device (9), the optical coupler device (9) having a corresponding light source, the optical coupler device (9) being fixed on a PCB board (8), and the optical coupler device (9) being signal-connected to the PCB board (8); a stopper (61), the stopper (61) being slidably disposed on a side of the cover plate (2) facing the cover opening button (4); A movable block (41), wherein the movable block (41) is fixedly arranged on a side of the cover opening button (4) facing the cover plate (2); A controller, wherein the PCB board (8) is connected to the controller by signal, and the controller is connected to the motor (71) by signal; a blocking member (62), the blocking member (62) being movably disposed in the cover plate (2); When the stopper (61) moves to be located directly below the movable block (41), the cover opening button (4) and the cover plate (2) are both in a locked state; and when the blocking member (62) moves to be located between the opposing light sources of the optical coupling device (9), the cover opening button (4) and the cover plate (2) are both in an unlocked state.

2. The automatic paper-cutting thermal printer capable of preventing knife jamming caused by accidental cover opening according to claim 1, characterized in that: A sliding groove (21) is provided on the top surface of the cover plate (2), a shifting block (5) is slidably provided in the sliding groove (21), the bottom of the shifting block (5) is fixedly connected to a connecting rod (51), the bottom end of the connecting rod (51) is fixedly connected to a connecting plate (6), and the blocking block (61) and the blocking member (62) are both fixedly connected to the connecting plate (6).

3. The automatic paper-cutting thermal printer capable of preventing knife jamming caused by accidental cover opening according to claim 2, characterized in that: A second hook plate (63) is fixedly mounted on one side of the bottom of the connecting plate (6), and a first hook plate (11) is provided on the machine body (1). When the first hook plate (11) and the second hook plate (63) are locked, the cover opening button (4) and the cover plate (2) are both in a locked state.

4. The automatic paper-cutting thermal printer capable of preventing knife jamming caused by accidental cover opening according to claim 3, characterized in that: The second hook plate (63) includes a second transverse plate, and the first hook plate (11) includes a first transverse plate. When the cover opening button (4) and the cover plate (2) are both in a locked state, the first hook plate (11) and the second hook plate (63) are locked, and the bottom surface of the first transverse plate and the top surface of the second transverse plate are in contact. When the cover opening button (4) and the cover plate (2) are both in an unlocked state, the first hook plate (11) and the second hook plate (63) are not in contact.

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