A typewriter model

Abstract

This utility model discloses a typewriter model, characterized by: a casing, a key mechanism, a type stem mechanism, a printable platform, and a type tape mechanism mounted on the casing; the type tape mechanism is located on the front side of the printable platform, and the casing has a power component that provides the printable platform with the ability to move in a first direction; the type stem mechanism is rotatably mounted on the casing, and the key mechanism is mounted on the casing via a bracket, the bracket being rotatably connected to the casing. The key mechanism is connected to the type stem mechanism and drives the type stem mechanism to rotate, striking the type tape on the type tape mechanism to contact the printable platform; the casing also has a limiting mechanism connected to the bracket and the printable platform, which restricts the printable platform from moving in the first direction. This utility model improves playability.

Description

Technical Field

[0001] This utility model relates to a toy model, and more particularly to a typewriter model, mainly relating to a typewriter toy model. Background Technology

[0002] A typewriter is a machine used to replace handwriting, copying, carbon copying, and stencil cutting. It is a mechanical, electric, or electronic device for writing. In use, pressing a key on the keyboard causes the typeface of the corresponding character to strike the ink ribbon, thus printing the character onto paper or other media. Each time a character is typed, the typewriter moves the paper to prepare for printing the next character.

[0003] In the existing technology, typewriter models and toys can only be used as ornamental models and cannot realize typing functions. Such typewriter models and toys have poor playability, poor interactivity, and poor user experience. Summary of the Invention

[0004] The purpose of this invention is to provide a typewriter model that improves playability and enhances the user experience through the use of this structure.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a typewriter model, including a casing, a key mechanism mounted on the casing, a type rod mechanism, a printable platform, and a type tape mechanism;

[0006] The text tape mechanism is located on the front side of the printing platform, and the housing is provided with a power component connected to the printing platform. The power component provides the printing platform with power to move in the first direction.

[0007] The type rod mechanism is rotatably mounted on the housing, and the button mechanism is mounted on the housing via a bracket. The bracket is rotatably connected to the housing, and the button mechanism is connected to the type rod mechanism. The button mechanism is used to drive the type rod mechanism to rotate and strike the type tape on the type tape mechanism to contact the printing platform.

[0008] The housing is also provided with a limiting mechanism, which is connected to the bracket and the printing platform. The limiting mechanism can restrict the printing platform from moving in the first direction.

[0009] In the above technical solution, the button mechanism includes multiple button parts, each button part including a button and a button connecting rod. The button is installed at the top front end of the button connecting rod, and the bottom rear end of the button connecting rod is connected to the bracket.

[0010] The letter bar mechanism includes multiple letter bar sections, each of which is connected to a key section; each letter bar section includes a letter bar component and a letter bar component connecting rod, the letter bar component is installed at the front end of the letter bar component connecting rod, and the rear end of the letter bar component connecting rod is rotatably connected to the housing;

[0011] A connector is also provided, one end of which is rotatably connected to the button linkage, and the other end of which is rotatably connected to the rear end of the character rod linkage; the connection point between the connector and the button linkage is located above the front end of the connection point between the button linkage and the bracket, and the connection point between the connector and the character rod linkage is located at the rear end of the connection point between the character rod linkage and the housing;

[0012] And / or, when the front end of the button is pressed down, it drives the button connecting rod to rotate around the bracket, and at the same time drives the connector to move forward, and pulls the character rod connecting rod to rotate through the connector, so that the character rod contacts the character tape, and pushes the character tape to contact the platform to be printed.

[0013] In the above technical solution, the bracket is provided with a stop bar, the extension direction of the stop bar is parallel to the movement direction of the printing platform, the stop bar is located above the front end of the connection between the button link and the bracket, the top of the button link is provided with a stop member, and the stop member is located on the rear side of the stop bar.

[0014] In the above technical solution, the bottom of the bracket is rotatably connected to the housing, the rear end of the bracket is connected to the housing via a bracket tension spring, and the bracket tension spring pulls the front end of the bracket to rotate upward; the front end of the limiting mechanism is rotatably connected to the rear end of the bracket.

[0015] And / or, the rotatable connection between the limiting mechanism and the bracket is located on the rear side of the connection between the bracket and the housing.

[0016] In the above technical solution, the limiting mechanism includes a limiting gear assembly and a transmission mechanism. The bottom of the platform to be printed is provided with a rack that meshes with the limiting gear assembly. The limiting gear assembly is rotatably mounted on the housing. One end of the transmission mechanism is rotatably connected to the rear end of the bracket, and the transmission mechanism is connected to the limiting gear assembly.

[0017] In the above technical solution, the transmission mechanism includes a first transmission mechanism and a second transmission mechanism. The front end of the first transmission mechanism is rotatably connected to the rear end of the bracket, the rear end of the first transmission mechanism is connected to the second transmission mechanism, and the second transmission mechanism is connected to the limiting gear assembly.

[0018] And / or, the first transmission mechanism includes a first connecting plate and a second connecting plate, the front end of the first connecting plate is rotatably connected to the bracket, the rear end of the first connecting plate is rotatably connected to the middle part of the second connecting plate, and the rear end of the second connecting plate is connected to the second transmission mechanism.

[0019] In the above technical solution, the second transmission mechanism includes an escapement device, which includes an escape disc and an escape pawl. The escape disc is rotatably connected to the housing, and the escape pawl is movably connected to the housing. The direction of movement of the escape pawl is parallel to the axis of the escape disc. The escape pawl engages with the escape disc, and the escape disc meshes with the limiting gear assembly, or the escape disc meshes with the limiting gear assembly via a side gear. The rear end of the second connecting plate is connected to the escape pawl. A return spring is provided on the housing, and the return spring provides a return force to the escape pawl to move backward.

[0020] In the above technical solution, the escape pawl is provided with two limiting protrusions at a lateral interval, namely a first limiting protrusion and a second limiting protrusion, and the two limiting protrusions are respectively positioned opposite to the two tooth grooves on the escape plate;

[0021] And / or, the first limiting tooth and the second limiting tooth are arranged in a staggered manner;

[0022] When the escape pawl moves forward, the first limiting tooth is disposed in a tooth groove of the escape plate, and the second limiting tooth is disposed on the front side of the escape plate; when the escape pawl moves backward, the first limiting tooth is disposed on the rear side of the escape plate, and the second limiting tooth is disposed in a tooth groove of the escape pawl.

[0023] In the above technical solution, the character belt mechanism includes a character belt, a character belt lifting part, and two pulleys. The character belt lifting part is disposed between the two pulleys and is vertically movable on the housing. The two pulleys are detachably rotatably connected to the housing. The two ends of the character belt are respectively wound around the two pulleys, and the middle part of the character belt is inserted into the character belt lifting part.

[0024] The bottom of the character strip lifting part is connected to the top of the second connecting plate;

[0025] And / or, the bottom of the character strip lifting part is connected to the top of the second connecting plate via an intermediate connector.

[0026] In the above technical solution, a transmission gear is rotatably mounted on the housing, and a pulley is detachably connected to the transmission gear; the second transmission mechanism also includes a transmission component, the two ends of which are respectively connected to the limiting gear assembly and the transmission gear. When the limiting gear assembly rotates, it synchronously drives the transmission gear to rotate via the transmission component.

[0027] In the above technical solution, the limiting gear assembly includes a first gear, a second gear, and a ratchet. The first gear is rotatably connected to the housing. The ratchet is coaxially mounted on the side wall of the first gear. The second gear has a ratchet cavity in the middle, and the ratchet is disposed in the ratchet cavity. The second gear meshes with the rack, and the first gear is connected to the transmission mechanism.

[0028] And / or, when the printing platform and rack move toward the first direction, the rack drives the second gear, ratchet and the first gear to rotate toward the third direction; when the printing platform and rack move toward the second direction, the rack drives the second gear to rotate toward the fourth direction, and the ratchet and the first gear do not rotate accordingly.

[0029] In the above technical solution, the power component includes an elastic reset member, one end of which is connected to the housing, and the other end of which is connected to the printing platform. The elastic reset member provides the printing platform with a pulling or pushing force to move in a first direction.

[0030] In the above technical solution, the prompting component includes a bell cover and a striking component, the striking component being disposed on the side of the bell cover; when the printing platform moves to the first position in the first direction, the pushing component contacts the striking component and drives the striking component to rotate;

[0031] And / or, the housing is provided with a striking element tension spring, one end of which is connected to the striking assembly, and the striking assembly is disposed between the striking element tension spring and the bell cover; the striking element tension spring provides the striking assembly with a pulling force to rotate in the fifth direction.

[0032] In the above technical solution, the striking assembly includes a striking element and a striking connector. The striking element is rotatably mounted on the housing, and the striking connector is rotatably mounted on the striking element, with the striking connector facing the pushing element. The striking element tension spring is connected to the striking element, and the striking element tension spring provides a pulling force to the striking element to rotate in the fifth direction.

[0033] In the above technical solution, the striking member is provided with a mounting groove, the mounting groove is oriented towards the bell cover, the middle part of the striking connector is rotatably mounted in the mounting groove via a rotating shaft, the first end of the striking connector extends out of the mounting groove and is located outside the striking member, and the first end of the striking connector is positioned directly opposite the pushing member;

[0034] And / or, a push spring is also provided, one end of which is connected to the striking member, and the other end of which is connected to or in contact with the striking connector, and the contact point between the push spring and the striking connector is located between the rotating shaft and the first end of the striking connector.

[0035] In the above technical solution, the printing platform is provided with a positioning roller and a limiting member. The two ends of the positioning roller are rotatably connected to the printing platform. The limiting member is rotatably disposed on the printing platform. The limiting member can be rotatably disposed on the positioning roller or away from the positioning roller. The text tape mechanism is disposed on the front side of the positioning roller.

[0036] In the above technical solution, one end of the positioning roller is provided with a gripper disc, and the other end of the positioning roller is also provided with an external ratchet; an adjusting component is movably installed on the printing platform, the adjusting component has a cavity inside, the external ratchet is disposed in the cavity, and the size of the cavity is larger than the outer diameter of the external ratchet; a push rod is rotatably installed on the adjusting component, and the end of the push rod abuts against the external ratchet;

[0037] And / or, the front end of the push rod is rotatably connected to the adjusting member, and the rear end of the push rod abuts against the tooth groove of the external ratchet.

[0038] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0039] 1. In this utility model, during the pressing of the button mechanism, the type rod mechanism is driven to strike the type tape mechanism, and the color is printed onto the workpiece through the type tape. At the same time, due to the presence of the limiting mechanism and the power component, the workpiece platform will move one position with each button press, and the limiting mechanism will restrict it to ensure continuous printing. In this way, the typewriter model can not only be placed, but also used for simple printing, which improves playability, interactivity and user experience.

[0040] 2. The limiting gear assembly of this utility model includes a first gear, a second gear, and a ratchet. The ratchet is located in the ratchet cavity of the second gear. When the button is pressed, the rotation limit of the first gear and the ratchet can be temporarily released, so that the printing platform can be moved temporarily. When the printing platform moves to the first direction and needs to change lines, the printing platform moves in the opposite direction. Due to the existence of the ratchet and the ratchet cavity, the reverse movement of the printing platform will not be affected, which makes the typewriter platform more beautiful, more playable, and provides a better user experience.

[0041] 3. This utility model is provided with a prompting component, which can contact the prompting component after the printing platform moves into place in the first direction, thereby prompting the operator to make a line break;

[0042] 4. This utility model can be used to assemble typewriter models, and based on the model toy, it can also realize typing. Compared with the actual typewriter, the structure is more ingenious and easier to assemble. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure in Embodiment 1 of this utility model;

[0044] Figure 2 This is a schematic diagram of the structure of the bracket connecting to the character tape mechanism through the first transmission mechanism in Embodiment 1 of this utility model (two sets of button sections are shown on the bracket, and the button section at the bottom is the space key);

[0045] Figure 3 This is a schematic diagram of the connection between the first transmission mechanism and the character belt lifting part in Embodiment 1 of this utility model;

[0046] Figure 4 yes Figure 2 A schematic diagram of the three-dimensional structure (arrows indicate the direction of movement of the text strip);

[0047] Figure 5 This is a structural schematic diagram of a set of keypads and a set of letter bars in the first embodiment of this utility model.

[0048] Figure 6 This is a schematic diagram of the structure of the limiting gear assembly connected to the second transmission mechanism and the transmission gear in Embodiment 1 of this utility model;

[0049] Figure 7 This is a schematic diagram of the connection between the printing platform and the limiting gear assembly in Embodiment 1 of this utility model (ratchet shown).

[0050] Figure 8 This is a schematic diagram of the second transmission mechanism in Embodiment 1 of this utility model (with the escape pawl in the forward-moving state);

[0051] Figure 9 This is a schematic diagram of the second transmission mechanism in Embodiment 1 of this utility model (with the escape pawl in the rearward position);

[0052] Figure 10 This is a schematic diagram of the structure of the pusher and the prompting component in Embodiment 1 of this utility model;

[0053] Figure 11 This is a structural schematic diagram of the pusher moving to the left and pushing the prompting component in the first embodiment of this utility model (the internal state of the striking component is shown).

[0054] Figure 12 This is a structural schematic diagram of the pusher in the state of pushing the prompting component in Embodiment 1 of this utility model (the internal state of the striking component is shown).

[0055] Figure 13 This is a schematic diagram of the structure of the positioning roller and the adjusting component in Embodiment 1 of this utility model;

[0056] Figure 14 yes Figure 13 A three-dimensional structural diagram of the positioning roller and the adjusting component.

[0057] The components include: 1. Housing; 11. Power unit; 12. Bracket; 120. Stop bar; 121. Bracket connecting rod; 122. Bracket tension spring; 13. Connector; 14. Transmission gear; 15. Scale; 16. Decorative panel; 2. Button mechanism; 21. Button section; 210. Button; 211. Button connecting rod; 212. Stop;

[0058] 3. Typeface mechanism; 31. Typeface section; 310. Typeface component; 311. Typeface component connecting rod;

[0059] 4. Platform for printing; 41. Rack; 42. Positioning roller; 43. Limiting component; 44. Gripper plate; 45. External ratchet; 46. Adjusting component; 460. Handle; 461. Adjusting component push spring; 47. Push rod; 48. Pushing component; 481. Push head;

[0060] 5. Typeface mechanism; 51. Typeface; 52. Typeface lifting part; 520. Longitudinal strip groove; 53. Pulley; 54. Intermediate connecting piece; 540. Second connecting shaft; 541. Third connecting shaft;

[0061] 61. Limiting gear assembly; 611. First gear; 612. Second gear; 613. Ratchet; 614. Ratchet cavity; 620. First connecting plate; 621. Second connecting plate; 6210. Vertical plate; 6211. Longitudinal plate; 6212. First connecting shaft; 6213. Vertical strip groove; 630. Escape plate; 631. Escape pawl; 6311. First limiting tooth; 6312. Second limiting tooth; 632. Side gear; 633. Return spring; 64. Transmission component; 640. Third gear; 641. Fourth gear; 642. Fifth gear; 643. Sixth gear; 644. Seventh gear;

[0062] 7. Notification component; 71. Bell cover; 72. Striking assembly; 721. Striking element; 7210. Striking head; 7211. Mounting slot; 7212. Positioning slot; 7213. First side; 7214. Second side; 722. Striking connector; 723. Rotating shaft; 724. Push spring; 73. Striking element tension spring. Detailed Implementation

[0063] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0064] Example 1: See Figure 1-14 As shown, a typewriter model includes a housing 1, a key mechanism 2 mounted on the housing 1, a type rod mechanism 3, a printable platform 4, and a type tape mechanism 5;

[0065] The text tape mechanism 5 is located on the front side of the printing platform 4. The housing 1 is provided with a power component 11 connected to the printing platform 4. The power component 11 provides power to the printing platform 4 to move in the first direction.

[0066] The bar mechanism 3 is rotatably mounted on the housing 1. The button mechanism 2 is mounted on the housing 1 via a bracket 12. The bracket 12 is rotatably connected to the housing 1. The button mechanism 2 is connected to the bar mechanism 3. The button mechanism 2 is used to drive the bar mechanism 3 to rotate and strike the character strip 51 on the character strip mechanism 5, so that the character strip 51 on the character strip mechanism 5 contacts the printing platform 4.

[0067] The housing 1 is also provided with a limiting mechanism, which is connected to the bracket 12 and the printing platform 4. The limiting mechanism can restrict the printing platform 4 from moving in the first direction.

[0068] In this invention, the typewriter model is an assembly toy, which can be made of plastic, wood, or metal. Once assembled, it serves not only as a model but also as a typing device. The printable material is paper, such as A4 white paper, which is mounted on the printable platform. In the diagram, the first direction is left, meaning the power unit provides the printable platform with the power to move to the left. The typeband mechanism has a typeband (made of ribbon or carbon paper). Pressing the button mechanism, which is connected to the typebar mechanism, causes the typebar mechanism to move. The typebar mechanism contacts the typeband and pushes the typeband into contact with the printable material (paper). The typebar mechanism strikes the typeband, transferring the desired pattern (or letters) onto the printable material, thus achieving typing. Because of the power component, the printing platform is constantly propelled to move left. Normally, the platform moves to the far left of the casing, where it can move left. However, due to the limiting mechanism connected to the support, it restricts the platform's leftward movement when the button is not pressed. After the button is pressed once (and resets upon release), the support rotates, causing the limiting mechanism to activate. This temporarily releases the restriction on the platform. The power component then moves the platform one position to the left, and the limiting mechanism resumes its leftward movement, waiting for the button to be pressed again to temporarily release the restriction. This cycle repeats, allowing for left-to-right typing on the printing surface. This design offers good aesthetics, enhanced playability and interactivity, and a better user experience.

[0069] See Figure 1 , 5 As shown, the button mechanism 2 includes a plurality of button parts 21. Each button part 21 includes a button 210 and a button connecting rod 211. The button 210 is installed on the top front end of the button connecting rod 211, and the bottom rear end of the button connecting rod is connected to the bracket.

[0070] The bar mechanism 3 includes a plurality of bar sections 31, each of which is connected to a key section 21; each bar section 31 includes a bar component 310 and a bar component connecting rod 311, the bar component 310 is installed at the front end of the bar component connecting rod 311, and the rear end of the bar component connecting rod 311 is rotatably connected to the housing 1.

[0071] A connector 13 is also provided, one end of which is rotatably connected to the button linkage 211, and the other end of which is rotatably connected to the rear end of the character linkage 311; the connection point between the connector 13 and the button linkage 211 is located above the front end of the connection point between the button linkage 211 and the bracket 12, and the connection point between the connector 13 and the character linkage 311 is located at the rear end of the connection point between the character linkage 311 and the housing 1;

[0072] When the front end of the button 210 is pressed down, it drives the button connecting rod 211 to rotate around the bracket 12, and at the same time drives the connector 13 to move forward. The connector 13 pulls the character rod connecting rod 311 to rotate, so that the character rod 310 contacts the character strip 51, and pushes the character strip 51 to contact the printable part on the printable part platform 4.

[0073] The buttons have characters, such as letters, on their top surfaces. In this embodiment, there are 30 button sections. 26 of these sections have 26 letters on their buttons, 3 sections have 3 punctuation marks, and the remaining section has a space bar without any characters. The rear ends of all button linkages can be rotatably connected to the support, or the rear ends of the 29 button sections with characters can be rotatably connected to the support, while the rear end of the space bar is fixedly connected to the support. There are 29 character bars, each connected to a button section with one of 29 characters (the characters on the character bars are the same as the characters on the connected button sections; the character patterns on the character bars are opposite to those on the buttons, ensuring that the characters printed on the printout are normal after contact with the character strip. The characters on the character bars are raised to ensure contact with the character strip and clear printing). The space bar is only connected to the support and not to any of the character bars. The casing has mounting positions, and the letter bar connecting rods are rotatably connected to these mounting positions. In one embodiment, the casing has an arc-shaped rod extending upwards from the middle towards both ends. All letter bar connecting rods are rotatably connected to the arc-shaped rod. The connection points between the letter bar connecting rods and the arc-shaped rods are located near the rear end of the letter bar connecting rods, and the distance between the rear end of the letter bar connecting rod and the arc-shaped rod is less than the distance between the front end of the letter bar connecting rod and the arc-shaped rod. The connection points between the connector and the letter bar connecting rods are located at... The rear end of the curved rod is located at the rear end, while the typist is located at the front end of the typist connecting rod. Therefore, the weight of the typist at the front end of the curved rod is greater than the weight of the typist at the rear end of the curved rod. In this structure, without external force, the front end of the typist connecting rod will fall downwards and press against the casing. That is, after the key loses its pressing force, the typist will return to its original position, which can also drive the key to return to its original position (that is, the front end of the key is in a pop-up state, and the front end of the key can move downwards after the key is pressed). The button linkage has an L-shaped structure, including a vertical rod and a middle rod. The bottom of the middle rod is rotatably connected to the bracket, and the top of the middle rod is connected to the rear end of the vertical rod. The button is installed at the top front end of the middle rod, and the front end of the connector is connected to the rear end of the middle rod. The connection point is located near the top of the middle rod, and the connection point between the connector and the middle rod is located on the front side of the middle rod. The connector and the middle rod are rotatably connected. The front end of the connector is hooked to the button linkage, and the rear end of the connector is also hooked to the rear end of the letter bar linkage. That is, both ends of the connector are rotatably connected to the button linkage and the letter bar linkage, respectively.After the button is pressed, the button linkage rotates around the bracket, and the front end of the button linkage moves downward, simultaneously pulling the connecting piece forward. As the connecting piece moves forward, it pulls the rear end of the character rod linkage downward and forward, while simultaneously causing the front end of the character rod linkage to rotate upward and backward, so that the top surface of the character rod faces backward and impacts the character strip. This causes the character strip at the contact point with the character rod to press against the workpiece, printing the characters from the character rod onto the workpiece. Due to the arrangement of the curved rods, when all character rods are rotated, the contact point between the character rod and the character strip is in the same position, ensuring precise printing. After the button is released, due to the weight of the character rod linkage and the character rod itself, the character rod and button sections will return to their original positions.

[0074] In this embodiment, since the button and the bracket are rotatably connected, in order to ensure that the bracket can rotate simultaneously when the button is pressed, a stop bar 120 and a bracket connecting rod 121 are provided on the bracket 12. The stop bar 120 and the bracket connecting rod 121 are parallel to each other and arranged laterally, parallel to the moving direction of the platform to be printed. The stop bar is located at the front end above the bracket connecting rod. The front end of the button connecting rod is provided with an upwardly protruding part, which is located at the top of the front end of the vertical rod. The button is mounted on the top surface of the protruding part. A stop member 212 is provided above the button connecting rod 211, and the stop member is close to the rear end of the button connecting rod. The stop member is mounted on the top surface of the protruding part. On the vertical rod, near the rear end, a connector is rotatably connected to the rear end of a stop, and the bottom rear end of a button linkage is rotatably connected to a bracket linkage (either all button linkages have their bottom rear ends connected to the bracket linkage, with the rear ends of the 29 buttons with characters rotatably connected to the bracket linkage, and the rear end of the spacebar's button linkage fixedly connected to the bracket linkage, or the rear end of the spacebar's button linkage fixedly connected to other positions on the bracket, so that pressing the spacebar alone rotates the bracket independently). In this embodiment, the bracket can also be rotatably connected to the housing via the bracket linkage. The stop is located behind the stop lever (the spacebar may not require a stop). When the button is pressed and the front end rotates downwards, the stop abuts against the stop lever and simultaneously rotates the bracket around the housing, ensuring that the bracket rotates with the button after it is pressed. After the button is released from pressure, the front end rotates upwards, and the stop rotates backwards, disengaging from the stop lever.

[0075] Since the button section is rotatably connected to the bracket, and the bracket is rotatably connected to the housing, preferably, the bottom rear side of the bracket is rotatably connected to the housing. The buttons of the button section are all located above the front end of the bracket. Therefore, after the button is pressed down, it will also drive the bracket to rotate around the housing, so that the front end of the bracket rotates downward and the top of the rear end of the bracket rotates forward and upward.

[0076] Meanwhile, in order to ensure that the bracket can stably and quickly self-reset to its original position after rotation, the bottom of the bracket 12 is rotatably connected to the housing 1, the rear end of the bracket 12 is connected to the housing 1 via a bracket tension spring 122, and the bracket tension spring 122 pulls the front end of the bracket 12 to rotate upward; the front end of the limiting mechanism is rotatably connected to the rear end of the bracket 12.

[0077] The rotatable connection between the limiting mechanism and the bracket 12 is located on the rear side of the connection between the bracket 12 and the housing 1.

[0078] After the pressure of the button mechanism is released, the weight of the typistol linkage and the typistol itself will cause the typistol and button sections to self-reset. Specifically, the front end of the button rises, the front end of the typistol linkage rotates downwards and forwards to reset, and the front end of the bracket also automatically rotates downwards and forwards (the rear end of the bracket is rotatably connected to the housing via a connecting shaft; since the button mechanism is mounted on the bracket, the bracket's center of gravity can be biased towards the rear end of the connecting shaft, thus the front end of the bracket will automatically rotate upwards). To improve its self-resetting efficiency and prevent jamming that could prevent the bracket from self-resetting (or the bracket's center of gravity being biased towards the front end), a bracket tension spring is used. This spring provides downward rotation for the bracket's rear end to self-reset, ensuring smooth and stable self-resetting. Alternatively, the bracket's overall center of gravity can be biased towards the front end of the connecting shaft. In this case, a bracket tension spring must be used to consistently provide downward rotation force to ensure that after the pressure of the button mechanism is released, the front end of the bracket flips upwards and the rear end flips downwards, causing the limiting mechanism at the connection point to the bracket to move backwards.

[0079] See Figure 6 , 7 As shown, the limiting mechanism includes a limiting gear assembly 61 and a transmission mechanism. The bottom of the printing platform 4 is provided with a rack 41 that meshes with the limiting gear assembly 61. The limiting gear assembly 61 is rotatably mounted on the housing 1. One end of the transmission mechanism is rotatably connected to the rear end of the bracket 12, and the transmission mechanism is connected to the limiting gear assembly 61.

[0080] In this embodiment, the limiting gear assembly meshes with the rack, thus restricting the movement of the printing platform towards the first direction by the power component. When the button is pressed, the bracket rotates once, briefly releasing the limiting gear assembly's rotation restriction. This allows the power component to move the printing platform and rack to a position. After the bracket returns to its original position, it continues to restrict the limiting gear assembly, preventing it from rotating further, thus continuing to restrict the rack and preventing the printing platform from moving towards the first direction. Therefore, when the button mechanism drives the printing rod mechanism to print a character on the paper on the printing platform, the power component can move the printing platform and the paper above it a predetermined distance towards the first direction, ensuring that the blank area on the paper is aligned with the printing band (the contact point between the printing rod and the printing band when it flips backward and upward). This guarantees that each time the printing rod mechanism strikes the printing band, the blank area of ​​the paper contacts the printing band and the corresponding character is printed.

[0081] See Figure 2-4 As shown, the transmission mechanism includes a first transmission mechanism and a second transmission mechanism. The front end of the first transmission mechanism is rotatably connected to the rear end of the bracket 12, the rear end of the first transmission mechanism is connected to the second transmission mechanism, and the second transmission mechanism is connected to the limiting gear assembly 61.

[0082] The first transmission mechanism includes a first connecting plate 620 and a second connecting plate 621. The front end of the first connecting plate 620 is rotatably connected to the bracket 12, the rear end of the first connecting plate 620 is rotatably connected to the middle part of the second connecting plate 621, and the rear end of the second connecting plate 621 is connected to the second transmission mechanism.

[0083] In this embodiment, when the button mechanism is pressed, it causes the front end of the bracket to rotate downwards, which in turn causes the top of the rear end of the bracket to rotate forward and upwards. The front end of the first connecting plate rotates and connects with the top of the rear end of the bracket. Therefore, it causes the rear ends of the first connecting plate and the second connecting plate to move forward. During this process, the second connecting plate pulls the second transmission mechanism or a part of the second transmission mechanism to move forward, releasing the rotation limit of the limiting gear assembly. As a result, the power component can drive the platform to be printed to move in the first direction (left side). When the button mechanism is released, the bracket resets, causing the first connecting plate and the second connecting plate to move backwards, which in turn causes the second transmission mechanism or a part of the second transmission mechanism to move backwards, limiting the limiting gear assembly again and preventing the limiting gear assembly from rotating, thus achieving the limitation of the platform to be printed moving in the first direction.

[0084] See Figure 6-9As shown, the second transmission mechanism includes an escapement device, which includes an escape disc 630 and an escape pawl 631. The escape disc 630 is rotatably connected to the housing 1, and the escape pawl 631 is movably connected to the housing 1. The direction of movement of the escape pawl 631 is parallel to the axis of the escape disc 630. In this embodiment, the escape pawl 631 moves back and forth, and the axis of the escape disc 630 is arranged longitudinally. The escape pawl 631 engages with the escape disc 630, and the escape disc 630 meshes with the limiting gear assembly 61, or the escape disc 630 meshes with the limiting gear assembly 61 via a side gear 632. The rear end of the second connecting plate 621 is connected to the escape pawl 631. A return spring 633 is provided on the housing 1, and the return spring 633 provides a return force to the escape pawl 631 to move backward.

[0085] The escape pawl 631 is provided with two limiting protrusions at a lateral interval, namely the first limiting protrusion 6311 and the second limiting protrusion 6312, and the two limiting protrusions are respectively positioned opposite to the two tooth grooves on the escape disc 630.

[0086] The first limiting tooth 6311 and the second limiting tooth 6312 are arranged in a staggered manner.

[0087] When the escape pawl 631 moves forward, the first limiting tooth 6311 is disposed in a tooth groove of the escape disc 630, and the second limiting tooth 6312 is disposed on the front side of the escape disc 630; when the escape pawl 631 moves backward, the first limiting tooth 6311 is disposed on the rear side of the escape disc 630, and the second limiting tooth 6312 is disposed in a tooth groove of the escape pawl 631.

[0088] In this embodiment, the first transmission mechanism is connected to the escape pawl. When the support rotates, it drives the rear end of the first transmission mechanism to move back and forth, synchronously driving the escape pawl to move back and forth. Taking the direction shown in the figure as an example, the power component applies a pulling force to the rack to move to the left. Therefore, the rack transmits a force to the limiting gear assembly to rotate counterclockwise. The escape disc meshes with the limiting gear assembly. Preferably, the escape disc has a ratchet-like structure. To facilitate the meshing of the escape disc and the limiting gear assembly, a side gear is coaxially mounted on the side wall of the escape disc. The side gear meshes with the limiting gear assembly. Therefore, the limiting gear assembly applies an external force to the side gear and the escape disc to rotate clockwise. Regardless of whether the escape pawl moves forward or backward, a limiting tooth is set in a tooth groove of the escape disc (the outer surface of the escape disc has multiple teeth arranged in a ring, and adjacent teeth form a tooth groove). The thickness of the limiting tooth is less than the width of the tooth groove. One of the limiting gears is located within a tooth groove, and the presence of the limiting gear assembly, rack, and power unit provides a force for the escapement disc to rotate clockwise. Taking the illustrated direction as an example, the escape pawl is positioned below the escapement disc. The left and right ends of the escape pawl are longitudinally connected to the housing. The rear end of the second connecting plate is connected to the right end of the escape pawl. Two limiting protrusions are spaced apart on top of the escape pawl. The first limiting protrusion is located to the left of the second limiting protrusion, and is positioned behind the left end of the second limiting protrusion. There is a longitudinal gap between the first and second limiting protrusions, and this longitudinal gap is less than the thickness of the escapement disc protrusion. When the escape pawl moves backward, the first limiting protrusion is behind the escape pawl and faces a tooth groove. The second limiting protrusion is located within a tooth groove. At this time, the left side of one of the escapement disc protrusions abuts against the right side of the second limiting protrusion. When the button is pressed, the first transmission mechanism pulls the escape pawl forward, causing the second limiting tooth to gradually disengage from its slot, while the first limiting tooth gradually enters its corresponding slot. At this point, the first limiting tooth is positioned to the left of the slot, with a gap between it and the tooth on the right side. After the second limiting tooth has moved forward and completely disengaged from one of the right slots, the first limiting tooth enters a slot. Due to the gap between the first limiting tooth and the tooth on the right side of its slot, the power unit provides clockwise rotation power to the escape disc, causing it to rotate clockwise. The right side of the first limiting tooth contacts the right side of the tooth groove, restricting the rotation of the escapement disc (the tooth on the right side of the tooth groove where the second limiting tooth was originally located will rotate clockwise by an angle, and the tooth will rotate to the left side of the rear end of the second limiting tooth, so that the tooth groove on the right side of the tooth is directly opposite the second limiting tooth). At this time, the printing platform moves a distance to the left, and at this time the second limiting tooth is directly opposite a tooth groove on the right (there is another tooth groove between the tooth groove and the tooth groove where the first limiting tooth is located), and is set to the left side of the tooth groove, with a gap between it and the right side of the tooth groove.After the button mechanism is released, due to the return force of the support spring and the restoring force of the return spring, the return spring pushes the escape pawl to move backward. The support spring causes the support to rotate in the opposite direction to reset, and also causes the first transmission mechanism to move backward. At this time, the first and second limiting teeth of the escape pawl will move backward. The first limiting tooth gradually enters the groove, and the second limiting tooth enters its corresponding groove. Since there is a gap between the second limiting tooth and the right side of its corresponding groove, the escape disc can rotate clockwise a certain distance. The angle and the limiting gear assembly can rotate counterclockwise by a certain angle. The power unit gives the printing platform and rack a certain distance to move to the left. After the escape plate rotates clockwise by a certain angle, the escape plate's tooth on the right side of the second limiting tooth will abut against the right side of the second limiting tooth (the tooth on the right side of the groove where the first limiting tooth was originally located rotates clockwise to the left side of the front end of the first limiting tooth, so that the first limiting tooth is directly opposite a groove on the right side of the tooth), thus achieving the limiting. At this time, the printing platform can no longer move to the left. Therefore, in this method, each time the button mechanism is pressed (and then released), the printing platform moves a predetermined distance in the first direction, which is the distance between two adjacent teeth on the escapement plate. This ensures that the printed characters do not overlap. (When the button mechanism is pressed down, the printing platform moves a distance A to the left. After the button is released, the printing platform also moves a distance A to the left. A + A = 2A. The distance 2A is the distance between two adjacent characters on the paper, ensuring that each character can be printed in the blank space of the paper without overlapping. Therefore, during one press of the button mechanism, the printing platform will intermittently move to the left twice. The distance 2A is the predetermined distance moved after each press of the button mechanism. The value of 2A is the distance between two adjacent teeth on the escapement plate.)

[0089] At the same time, when the space bar is pressed, the printing bar will not work, but the support and transmission mechanism will work simultaneously, causing the printing platform to move to the left a predetermined distance, leaving a blank space at that point during subsequent printing.

[0090] Once the printing platform has moved to its left position, it indicates that a line has been printed on the paper. When printing needs to start from the beginning (from left to right), to facilitate the operator moving the printing platform to the right, the limit gear assembly can rotate normally without being restricted by the second transmission mechanism. Therefore, see [link to relevant documentation]. Figure 7As shown, the limiting gear assembly 61 includes a first gear 611, a second gear 612, and a ratchet 613. The first gear 611 is rotatably connected to the housing 1. The ratchet 613 is coaxially mounted on the side wall of the first gear 611. The second gear 612 has a ratchet cavity 614 in the middle, and the ratchet 613 is disposed in the ratchet cavity 614. The second gear 612 meshes with the rack 41. The first gear 611 is connected to the transmission mechanism. The first gear meshes with the escapement disc or with the side gear. In this embodiment, the first gear meshes with the side gear.

[0091] When the printing platform and rack move in the first direction (in the diagram, the first direction is leftward movement and the second direction is rightward movement), the rack 41 drives the second gear 612, ratchet 613, and first gear 611 to rotate in the third direction (in the diagram, the third direction is counterclockwise rotation and the fourth direction is clockwise rotation); when the printing platform 4 and rack 41 move in the second direction, the rack 41 drives the second gear 612 to rotate in the fourth direction, and the ratchet 613 and first gear 611 do not rotate with it.

[0092] In this embodiment, the ratchet and the first gear are fixed together to form a whole and are rotatably connected to the housing. The second gear is rotatably disposed outside the ratchet. Taking the ratchet disposed on the front side wall of the first gear as an example, the second gear is located in front of the first gear. The first gear restricts the second gear from moving backward, preventing it from disengaging from the ratchet. The ratchet cavity is disposed on the rear side of the second gear. The front middle part of the second gear is rotatably connected to the housing, while the rear side of the first gear is rotatably connected to the housing. This restricts the axial position of the first and second gears, preventing the second gear from disengaging from the ratchet and ensuring that the second gear is always outside the ratchet. It also ensures that the second gear is coaxially disposed with the first gear and the ratchet. The ratchet includes a main body and multiple elastic protrusions annularly mounted on the outside of the main body. Multiple ratchet grooves are provided on the inner wall of the ratchet cavity. One end of each elastic protrusion is connected to the main body, and the other end is inclined clockwise. The outer surface of the elastic protrusion abuts against the inner wall of the ratchet cavity. When the ratchet is stationary, and the second gear rotates clockwise, the inner wall of the ratchet cavity abuts against the elastic protrusion. Because the elastic protrusion is inclined clockwise, the second gear can rotate clockwise relative to the ratchet. However, when the second gear wants to rotate counterclockwise relative to the ratchet, the elastic protrusion will abut against the ratchet groove in the ratchet cavity, being stopped and limited, thus preventing the second gear from rotating counterclockwise relative to the ratchet alone. Therefore, when the rack is pulled to the left by the power component, the rack provides the second gear with a counterclockwise rotational force. When the rack moves to the left, it drives the second gear to rotate counterclockwise. When the second gear rotates counterclockwise, it simultaneously drives the ratchet and the first gear to rotate counterclockwise. When the printing platform moves to the far left and a new line needs to be started from the left side of the paper, the user grasps the printing platform and applies a rightward push to overcome the power of the power unit. This moves the printing platform to the right, simultaneously moving the rack to the right as well. Due to the meshing of the rack and the second gear, the rack drives the second gear to rotate clockwise. (Because the escape pawl restricts the rotation of the escape plate and the side gear, the side gear will jam the first gear, preventing the first gear and the ratchet from rotating.) Since the second gear can rotate clockwise relative to the ratchet, the escape pawl and escape plate will not be damaged when the printing platform moves to the right, ensuring that the printing platform can move to the right normally and smoothly for the change of line.

[0093] In this embodiment, the power component includes an elastic reset member. One end of the elastic reset member is connected to the housing, and the other end of the elastic reset member is connected to the printing platform. The elastic reset member provides a pulling or pushing force to the printing platform to move in a first direction.

[0094] The elastic reset component can be a tension spring, a coil spring, etc. In this embodiment, the elastic reset component is a coil spring (similar to a measuring tape structure). The left end of the coil spring is connected to the housing. The left end of the housing is provided with a coil spring shaft. The left end of the coil spring is connected to the coil spring shaft. The coil spring is wound on the coil spring shaft. The right end of the coil spring is connected to the printing platform. The coil spring will always apply a pulling force to the left of the printing platform (a pulling force that moves in the first direction), and the stroke is relatively long.

[0095] See Figure 1 , 13 As shown in Figure 14, the printing platform 4 is provided with a positioning roller 42 and a limiting member 43. The two ends of the positioning roller 42 are rotatably connected to the printing platform 4. The limiting member 43 is rotatably disposed on the printing platform 4. The limiting member 43 can be rotatably disposed on the positioning roller 42 or away from the positioning roller 42. The text tape mechanism 5 is disposed on the front side of the positioning roller 42.

[0096] There is a certain gap between the bottom surface of the positioning roller and the top surface of the printing platform. This gap value is adapted to the paper thickness, or slightly larger than the paper thickness, or slightly smaller than the paper thickness (if the gap value is smaller than the paper thickness, the outer surface of the positioning roller is made of a flexible positioning roller with an elastically deformable material, which can be deformed for paper pressing). When loading the paper, insert its rear end from the front of the positioning roller between the positioning roller and the printing platform. Then, flip the front end of the paper over the positioning roller, and flip the limiting member over to press it onto the top surface of the support (the rotating connection between the limiting member and the printing platform is located on the rear side or above the rear side of the positioning roller; the front end of the limiting member can rotate to press against the top surface of the positioning roller, pressing the paper firmly. When the front end of the limiting member is flipped towards the rear and upward, the limiting member moves away from the top of the positioning roller, releasing the limiting of the paper; the front end of the limiting member can be a rotatable roller structure). This limits the paper, and the area directly in front of the positioning roller is the printing position. During printing, when the character bar strikes the character tape, it presses the character tape onto the paper directly in front of the positioning roller, thus leaving the printed characters on the paper.

[0097] See Figure 1 , 13 As shown in Figure 14, one end of the positioning roller 42 is provided with a gripper disc 44, and the other end of the positioning roller 42 is also provided with an external ratchet 45; an adjusting component 46 is movably installed on the printing platform 4, the adjusting component 46 has a cavity inside, the external ratchet 45 is disposed in the cavity, and the size of the cavity is larger than the outer diameter of the external ratchet 45; a push rod 47 is rotatably installed on the adjusting component 46, and the end of the push rod 47 abuts against the external ratchet 45;

[0098] The front end of the push rod 47 is rotatably connected to the adjusting member 46, and the rear end of the push rod 47 abuts against a tooth groove of the external ratchet 45.

[0099] In this embodiment, after the rear end of the paper is inserted from the front between the positioning roller and the printing platform, the positioning roller presses the end of the paper firmly onto the printing platform. To ensure the paper can move normally on the positioning roller, the operator grasps the gripper disc and rotates the positioning roller. As the positioning roller rotates, it simultaneously moves the rear end of the paper backward, so that only a portion of the front end of the paper is exposed in front of the positioning roller. The exposed portion of the paper is then flipped under the limiting member and pressed down by it. When a new line needs to be printed, the operator grasps the adjusting piece and moves it backward. This pushes the external ratchet to rotate by an angle, thereby rotating the positioning roller by an angle. The rotation of the positioning roller moves the front end of the paper forward by one line, ensuring the blank area of ​​the paper is aligned with the text tape for easy character printing. Then, the adjusting component is moved forward to reset. After resetting, the push rod also moves forward, disengaging from the outer ratchet's toothed slot. Due to its own weight, the front end of the push rod rotates downwards and falls into the next toothed slot, awaiting the next push of the push rod to rotate the outer ratchet. After the next line, the operator grasps the printing platform and moves it to the right, so that the contact point between the text tape and the text rod is directly opposite the left side of the blank area on the paper, and the next line of characters is printed from left to right.

[0100] Furthermore, a handle 460 is connected to the front end of the adjusting component. One end of the handle is rotatably connected to the machine housing, and the middle of the handle is rotatably connected to the front end of the adjusting component. When the operator grasps the handle and rotates it, the machine housing moves the adjusting component back and forth, making it easier to move the adjusting component forward and backward to achieve paper line changing. A forward push spring 461 is located on the machine housing behind the adjusting component. The rear end of the forward push spring is connected to the machine housing, and the front end contacts or connects to the rear end face of the adjusting component. When the adjusting component moves backward, the forward push spring is compressed, pushing the positioning roller to rotate. After releasing the backward push force, the restoring force of the forward push spring pushes the adjusting component to move forward automatically, thus improving ease of use and ensuring the adjusting component self-reset, preventing the adjusting component from failing to move backward during subsequent line changes (if the adjusting component was not moved forward and reset after the previous line change). Of course, other mechanisms that facilitate the forward and backward movement of the adjusting component can also be used.

[0101] A scale 15 can also be installed on the front side of the printing platform to indicate its left and right movement. A decorative table 16 can also be installed on the rear side of the button mechanism's housing or support, where DIY decorations such as lighting components can be added for a more aesthetically pleasing appearance.

[0102] See Figure 2-4As shown, the character belt mechanism 5 includes a character belt 51, a character belt lifting part 52, and two pulleys 53. The character belt lifting part 52 is disposed between the two pulleys 53. The character belt lifting part 52 is vertically movable on the housing 1. The two pulleys 53 are detachably rotatably connected to the housing 1. The two ends of the character belt 51 are respectively wound around the two pulleys 53, and the middle part of the character belt 51 is inserted into the character belt lifting part 52.

[0103] The bottom of the character strip lifting part 52 is connected to the top of the second connecting plate 621;

[0104] The bottom of the text ribbon lifting part 52 is connected to the top of the second connecting plate 621 via the intermediate connector 54.

[0105] In this embodiment, the character strip is a colored ribbon or a material similar to carbon paper, which, when subjected to external force, can transfer its color onto the paper. To ensure that the printing platform does not come into contact with the ribbon when it moves or when the paper is installed or replaced, the character strip is positioned below the front end of the positioning roller when the button mechanism is not pressed. After the button mechanism is pressed, it moves the first and second connecting plates forward. When the first connecting plate moves forward, the top of the second connecting plate also moves forward a certain distance. As the top of the second connecting plate moves forward, the character strip lifting part moves upward through the intermediate connector, facing the front end of the positioning roller where printing is required. At this time, the character rod rotates backward and upward, pushing the character strip into contact with the paper, thus printing the characters on the character rod onto the paper. After the button mechanism's pressure is released, the character rod mechanism, button mechanism, and support reset, and the character strip lifting part also resets and moves downward by gravity and the pulling force of the second connecting plate moving backward.

[0106] In this embodiment, the second connecting plate 621 is an L-shaped structure with a rearward opening, including a vertical plate 6210 and a longitudinal plate 6211. The front end of the longitudinal plate is connected to the bottom of the vertical plate, and the rear end of the longitudinal plate is connected to the side of the escapement pawl (it can be fixedly connected or rotatably connected). The top of the vertical plate is connected to the text lifting part via an intermediate connector, and the rear end of the first connecting plate is rotatably connected to the middle of the vertical plate. Furthermore, there are two second connecting plates, which are spaced apart from each other. The rear end of the first connecting plate is located between the two second connecting plates, and the bottoms of the two second connecting plates are connected by a connecting plate. Above the connecting plate, there is also a first connecting shaft 6212. The two ends of the first connecting shaft are connected to the vertical plates of the two second connecting plates, and the rear end of the first connecting plate is rotatably connected to the first connecting shaft. The vertical plates of the two second connecting plates are connected to the text lifting part via an intermediate connector, which is located between the two vertical plates. Above the first connecting shaft 6212, there is a second connecting shaft 540, and the two ends of the second connecting shaft are respectively connected to the vertical plates on the second connecting plates on both sides.

[0107] In this embodiment, the intermediate connector is a V-shaped structure, a C-shaped structure, or an L-shaped structure. In this embodiment, the intermediate connector adopts a V-shaped structure as an example. The middle part of the intermediate connector is rotatably connected to the housing. The two ends of the intermediate connector are respectively provided with a second connecting shaft 540 and a third connecting shaft 541. The second connecting shaft is connected to the top of the vertical plate of the second connecting plate on both sides, and the third connecting shaft is connected to the bottom of the character belt lifting part. The second connecting shaft is located above the first connecting shaft. The bottom of the character belt lifting section has a longitudinal strip groove 520, and the vertical plate has a vertical strip groove 6213. The two ends of the second connecting shaft are respectively inserted into the vertical strip grooves on both sides, and the two ends or one end of the third connecting shaft are inserted into the longitudinal strip groove. The longitudinal strip groove is set perpendicular to the vertical strip groove. The outer diameter of the third connecting shaft is less than or equal to the width of the longitudinal strip groove, but the outer diameter of the third connecting shaft is less than the length of the longitudinal strip groove. The outer diameter of the second connecting shaft is less than or equal to the width of the vertical strip groove, but the outer diameter of the second connecting shaft is less than the length of the vertical strip groove. The end of the second connecting shaft can move vertically up and down along the vertical strip groove, and the end of the third connecting shaft can move longitudinally back and forth along the longitudinal strip groove. The V-shaped opening of the intermediate connector faces downwards. After the button mechanism is pressed, the rear end of the bracket rotates forward and upward, causing the first connecting plate to move forward. The first connecting plate then pulls the second connecting plate forward. When the second connecting plate moves forward, it causes the second connecting shaft to move forward. Because the middle part of the intermediate connector is rotatably connected to the housing (the rotatable connection point is located between the second and third connecting shafts, and also above them), and because the position of the rotatable connection point between the intermediate connector and the housing does not change or move, when the second connecting shaft moves forward, it will cause... The intermediate connecting piece rotates around the casing. As the second connecting shaft moves forward, it simultaneously moves downward along the vertical strip groove. The third connecting shaft moves upward and forward along the longitudinal strip groove (if the rotation angle is too large, it will also move backward after moving forward). This creates an arc-shaped trajectory for the second and third connecting shafts around the connection between the casing and the intermediate connecting piece. When the third connecting shaft moves upward and forward, it pushes the character belt lifting part upward, lifting the character belt and aligning it with the positioning rollers and paper on the printing platform. Simultaneously, the forward movement of the second connecting plate temporarily moves the escapement pawl forward, allowing the escapement disc to rotate by a predetermined angle. The limit gear assembly can also rotate by a predetermined angle, allowing the printing platform to move a predetermined distance to the left. After the button mechanism is released, the front end of the bracket rotates upward and the rear end rotates downward and backward. At this time, the first connecting plate and the second connecting plate move backward, and the second connecting shaft moves upward along the vertical strip groove as it moves backward. The third connecting shaft follows the downward rotation and backward movement, causing the character belt lifting part to move downward. At this time, the escape pawl moves backward, the escape plate can rotate a predetermined angle, the limit gear assembly can also rotate a predetermined angle, and the platform to be printed can move a predetermined distance to the left.

[0108] To ensure clear characters on the paper after the type rod strikes the type tape and comes into contact with it, a type tape lifting mechanism is installed. This mechanism only lifts when the type rod needs to strike the type tape, thus guaranteeing the printing quality.

[0109] The top of the text lifting mechanism has two locking pieces with a gap between them. When the text rod is lifted, it is positioned at this gap, and the text belt passes through the two locking pieces. The locking pieces restrict the text belt, ensuring that the text belt moves up and down with the text lifting mechanism. Furthermore, when the pulley rotates, the text belt can move within this gap, ensuring that it is struck by the text rod and comes into contact with the paper.

[0110] To ensure that the ink on the printing tape is clearly printed onto the paper during the printing process, the printing tape is movable. This allows the printing rod to strike different positions on the tape during printing, transferring the ink onto the paper and ensuring clear printing. (If the printing rod remains in contact with the same position on the printing tape, most of the ink in that area will be used up quickly, or almost completely depleted, resulting in unclear characters on the paper.) Therefore, in this embodiment, see... Figure 6 As shown, a transmission gear 14 is rotatably mounted on the housing 1, and a pulley 53 is detachably connected to the transmission gear 14. The second transmission mechanism also includes a transmission component 64, the two ends of which are respectively connected to the limiting gear assembly 61 and the transmission gear 14. When the limiting gear assembly 61 rotates, it synchronously drives the transmission gear 14 to rotate via the transmission component 64. A column is located at the top of the center of the transmission gear, and a column is also provided on the housing. The two columns are used for mounting two pulleys. The pulley mounted on the transmission gear column rotates along with the rotation of the transmission gear. This pulley is rotatably connected to the housing via the transmission gear, and the pulley mounted on the housing column can rotate on this column.

[0111] In this embodiment, the transmission component uses multiple gears that mesh sequentially or are connected by a shaft. One gear meshes with the first gear, and another gear meshes with the transmission gear. When the rack drives the limiting gear assembly (first gear) to rotate, it also synchronously drives the transmission gear to rotate. As the transmission gear rotates, it drives the pulley mounted on it to rotate, pulling out and rewinding the character tape on another pulley. In other words, the character tape moving after passing through the character tape lifting section. Taking the transmission gear located on the right side of the character tape lifting section as an example, initially, the character tape is wound on the pulley on the left. After the end of the character tape is pulled out and passes through the character tape lifting section, it connects to the pulley on the transmission gear. During typing, the pulley on the right rotates, pulling out the character tape on the pulley on the left and rewinding it. The character tape moving to the right after passing through the character tape lifting section means that the contact position between the character rod and the character tape is different each time, thus fully utilizing the ink in different parts of the character tape and ensuring clear printed characters. After the right pulley finishes winding the text tape onto the left pulley, remove both pulleys. Install the pulley with the wound text tape onto the left side of the casing near the text tape lifter. Install the empty pulley onto the drive gear. Reconnect the text tape from the left pulley through the text tape lifter and onto the right pulley for reuse. If printing becomes unclear after multiple uses, it indicates insufficient ink on the text tape, and it should be replaced with new, unused text tape.

[0112] In this embodiment, the axis of the limiting gear assembly is arranged longitudinally, and the axis of the transmission gear is arranged vertically. The transmission component includes a third gear 640, a fourth gear 641, a fifth gear 642, a sixth gear 643, and a seventh gear 644 rotatably mounted on the housing. The third gear meshes with the first gear, and its axis is parallel to the axis of the first gear. The fourth gear and the fifth gear are connected by a shaft. The axes of the fourth, fifth, sixth, and seventh gears are parallel to each other and arranged laterally. When the third gear meshes with the fourth gear, it drives the third gear to rotate. When the third gear meshes with the fourth gear, it also drives the fourth gear to rotate. The fourth gear synchronously drives the fifth gear to rotate via the shaft. The fifth gear meshes with the sixth gear, the sixth gear meshes with the seventh gear, and the seventh gear meshes with the transmission gear, thereby driving the transmission gear to rotate. Of course, the transmission component can also use only one gear, with its two sides meshing with the first gear and the transmission gear respectively, so that when the first gear rotates, it simultaneously drives the transmission gear to rotate. The transmission component is designed to drive the transmission gear to rotate, and the number and layout of gears are determined based on the distance between the transmission gear and the limit gear assembly. The transmission component can be a belt structure, with the belt connecting the first gear and the transmission gear, or it can be any other structure that can drive the transmission gear to follow the rotation of the first gear of the limit gear assembly.

[0113] To inform users that after the printing platform has moved to the predetermined position to the left (when the print position on the paper is at or near the right edge, a line break is required to prevent multiple characters from being printed repeatedly in the same position on the paper or onto the positioning roller), see [link to relevant documentation]. Figure 1 , 10 As shown in -12, the housing 1 is also provided with a prompting component 7, and the printing platform 4 is provided with a pusher 48 facing the prompting component 7. When the printing platform 4 moves to the first position in the first direction, the pusher 48 contacts the prompting component 7.

[0114] After the printing platform moves to the left to the first position, the pusher and the prompting component come into contact, and the prompting component issues a prompt to remind the user to perform the change action (the positioning roller rotates at an angle, while simultaneously moving the printing platform to the right, so that the striking position of the letter bar is directly opposite the left end of the paper).

[0115] In one embodiment, the prompting component may include an interconnected prompting element, a battery, and a touch switch. The prompting element may be a speaker and / or an LED light. After the pusher and the touch switch come into contact, the electrical connection between the prompting element and the battery is established, and the speaker emits a sound and / or the LED light illuminates, prompting the user to perform a line break operation.

[0116] In this embodiment, a battery-dependent structure is not used; purely mechanical components are employed. See also... Figure 10-12 As shown, the prompting component 7 includes a bell cover 71 and a striking component 72, the striking component 72 being disposed on the side of the bell cover 71; when the printing platform 4 moves to the first position in the first direction, the pushing component 48 contacts the striking component 72 and drives the striking component 72 to rotate;

[0117] The striking assembly 72 includes a striking element 721 and a striking connector 722. The striking element 721 is rotatably mounted on the housing 1, and the striking connector 722 is rotatably mounted on the striking element 721. The striking connector 722 is positioned directly opposite the pusher 48.

[0118] A striking element tension spring 73 is also provided. One end of the striking element tension spring 73 is connected to the striking element 721, and the other end is connected to the housing 1. The striking element 721 is disposed between the striking element tension spring 73 and the bell cover 71. The striking element tension spring 73 provides the striking element 721 with a pulling force that rotates in the fifth direction (in the figure, the fifth direction is clockwise).

[0119] See Figure 10-12As shown, taking the illustrated direction as an example, a second position is located to the right of the first position. When the printing platform moves towards the first position in the first direction, it will first move to the second position. At the second position, the pusher first contacts the right side of the rear end of the striking connector. When it continues to move to the left to the first position, it will cause the striking connector to rotate (in the illustrated direction, the striking connector rotates counterclockwise, the bell cover is located on the left side of the striking assembly, and the striking spring is located on the right side of the striking assembly). When the striking connector rotates, it simultaneously causes the striking component to rotate, which will stretch the striking spring. When the striking connector rotates counterclockwise... After rotating to a certain angle, the pushing component and the striking connector separate, with the pushing component positioned on the left side of the rear end of the striking connector. At this point, the restoring force of the striking component's tension spring causes the striking component and the striking connector to rotate clockwise. During this process, due to the tension of the striking component's tension spring, the striking component and the striking connector rotate rapidly clockwise, and due to the inertia of the striking component's rotation, the front end of the striking component rotates to the left and rear to strike the bell cover, causing the bell cover to ring. The bell cover emits a sound, reminding the user that the printing platform needs to be moved to the left and then moved to the right. After the striking component strikes the bell cover, the striking component's tension spring returns to its original state, causing the front end of the striking component to rotate to the right and return to its original position. The front end of the striking component 721 is the striking head 7210, which faces the bell cover. When the striking component is pulled by the striking component's tension spring to rotate rapidly clockwise, the striking head strikes the bell cover, causing the bell cover to emit a sound as a reminder.

[0120] In this embodiment, the right end of the power component is connected to the pusher, but not directly to the printing platform. The power component is connected to the printing platform through the pusher, which facilitates the connection between the power component and the printing platform and makes assembly easier.

[0121] The pusher 48 has a forward-extending pusher 481 on its left front end. The pusher is used to contact the striking connector and push the striking connector to rotate. After the bell is struck, the pusher is on the left side of the striking connector. If the striking connector and the striking piece are fixedly connected, when the printing platform moves to the right, the pusher will first contact the left side of the rear end of the striking connector and drive the striking connector and the striking piece to rotate clockwise (the striking piece's tension spring is compressed or deformed). This continues until the striking connector rotates to the point of separation from the pusher. Then, the restoring force of the striking piece's tension spring will push the striking piece to rotate counterclockwise and return to its initial position.

[0122] During this process, when the pusher pushes the striking connector to rotate clockwise, it also causes the striking component to rotate clockwise, making the striking head of the striking component contact the bell cover and preventing the pusher (the platform to be printed) from moving to the right.

[0123] Therefore, to ensure that the striking part is not blocked by the bell cover during the rightward movement of the printing platform, see [reference needed]. Figure 11 , 12 As shown, the striking member 721 has a mounting groove 7211 facing the bell cover. The middle part of the striking connector 722 is rotatably mounted in the mounting groove 7211 via a pivot 723. The first end of the striking connector 722 extends out of the mounting groove 7211 and is located outside the striking member 721, with the first end facing the pusher 48. The first and second ends of the striking connector are respectively the rear and front ends of the striking connector.

[0124] In this embodiment, the mounting groove is disposed inside the striking member, the left side of the mounting groove is connected to the left side of the striking member, and the front end and rear end of the mounting groove are connected to the front end and rear end of the striking member, respectively.

[0125] A push spring 724 is also provided. One end of the push spring 724 is connected to the striking member 721, and the other end of the push spring 724 is connected to or in contact with the striking connector 722. The contact point between the push spring 724 and the striking connector 722 is located between the rotating shaft 723 and the first end of the striking connector 722.

[0126] A positioning groove 7212 is provided at the right end of the mounting groove 7211. The positioning groove is located on the right side of the rear end of the rotating shaft. The right end of the push spring is inserted into the positioning groove, and at the same time, the right end of the push spring is also fixed to the right end of the positioning groove. The left end of the push spring extends out of the positioning groove and is located in the mounting groove at the right end of the striking connector. Furthermore, the right side of the mounting groove is a V-shaped surface, including a first side 7213 and a second side 7214 that are connected to each other. The front end of the first side is connected to the front end face of the striking member, the front end of the second side is connected to the rear end of the first side, and the rear end of the second side is connected to the rear end face of the striking member. The second side is inclined to the right from front to back. The included angle between the first side and the second side exceeds 180°, preferably between 200° and 225°. In the illustrated direction, in the normal state of the striking member tension spring, the first side is arranged longitudinally, and the second side is inclined to the right from front to back. The positioning groove is provided on the second side, and the rotating shaft is located at the connection between the first side and the second side. On the left side, the left end of the push spring rests against the right side of the striking connector. With the push spring extended, the right side of the striking connector at the front end of the shaft rests against the first side. As the pusher moves to the left and contacts the right rear side of the striking connector, and continues to move to the left, because the right side of the striking connector at the front end of the shaft rests against the first side, when the pusher pushes the striking connector to rotate counterclockwise, the right front side of the striking connector simultaneously pushes the striking piece to rotate counterclockwise along with the striking connector, stretching the striking piece's tension spring. After the pusher and the striking connector separate, the striking piece's tension spring pulls the striking piece and the striking connector to rotate clockwise, striking the bell cover. When the pusher moves to the right... After the pusher head of the pusher contacts the left side of the rear end of the striking connector, as the pusher continues to move to the right, there is a gap between the right side and the second side of the striking connector at the rear end of the pivot. Therefore, the striking connector will rotate clockwise around the striking member via the pivot and compress the push spring. At this time, the striking member will not follow the clockwise rotation (or the rotation angle is small, and the striking member will not contact the bell cover, or the striking member will first follow the striking connector to rotate until the striking member contacts the bell cover, after which the striking connector continues to rotate in the same direction, and the bell cover will not affect the pusher's rightward movement past the striking connector). When the pusher head of the pusher passes the striking connector and moves to the right end of the striking connector, the restoring force of the push spring will push the striking connector to rotate counterclockwise around the striking member via the pivot to reset, at most causing the right side of the striking connector at the front end of the pivot to abut against the first side. In this method, when the printing platform moves to the left, the pusher and the striking connector work together to rotate the striking component. After the pusher and the striking connector separate, the striking component's tension spring pulls it to rotate, striking the bell cover and ringing to indicate a new line. When the printing platform moves to the right, the pusher pushes the striking connector without being limited by the striking component or the bell cover, ensuring that the printing platform moves normally to the right past the striking component.

[0127] In the description of this utility model, it should be understood that the terms "upper," "lower," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0128] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. For instance, the two components can be mechanically connected by abutting or contacting each other; they can also be directly hung or connected by an intermediate medium; or they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

Claims

1. A typewriter model, characterized in that: Includes the casing, the key mechanism mounted on the casing, the type rod mechanism, the print platform, and the type tape mechanism; The text tape mechanism is located on the front side of the printing platform, and the housing is provided with a power component connected to the printing platform. The power component provides the printing platform with power to move in the first direction. The type rod mechanism is rotatably mounted on the housing, and the button mechanism is mounted on the housing via a bracket. The bracket is rotatably connected to the housing, and the button mechanism is connected to the type rod mechanism. The button mechanism is used to drive the type rod mechanism to rotate and strike the type tape on the type tape mechanism to contact the printing platform. The housing is also provided with a limiting mechanism, which is connected to the bracket and the printing platform. The limiting mechanism can restrict the printing platform from moving in the first direction.

2. The typewriter model according to claim 1, characterized in that: The button mechanism includes multiple button sections, each button section including a button and a button connecting rod. The button is mounted on the top front end of the button connecting rod, and the bottom rear end of the button connecting rod is connected to the bracket. The letter bar mechanism includes multiple letter bar sections, each of which is connected to a key section; each letter bar section includes a letter bar component and a letter bar component connecting rod, the letter bar component is installed at the front end of the letter bar component connecting rod, and the rear end of the letter bar component connecting rod is rotatably connected to the housing; A connector is also provided, one end of which is rotatably connected to the button linkage, and the other end of which is rotatably connected to the rear end of the character rod linkage; the connection point between the connector and the button linkage is located above the front end of the connection point between the button linkage and the bracket, and the connection point between the connector and the character rod linkage is located at the rear end of the connection point between the character rod linkage and the housing; And / or, when the front end of the button is pressed down, it drives the button connecting rod to rotate around the bracket, and at the same time drives the connector to move forward, and pulls the character rod connecting rod to rotate through the connector, so that the character rod contacts the character tape, and pushes the character tape to contact the platform to be printed.

3. The typewriter model according to claim 2, characterized in that: The bracket is provided with a stop bar, the extension direction of which is parallel to the movement direction of the printing platform. The stop bar is located above the front end of the connection between the button link and the bracket. The top of the button link is provided with a stop member, which is located on the rear side of the stop bar.

4. The typewriter model according to claim 1, characterized in that: The bottom of the bracket is rotatably connected to the housing, and the rear end of the bracket is connected to the housing via a bracket tension spring. The bracket tension spring pulls the front end of the bracket to rotate upwards. The front end of the limiting mechanism is rotatably connected to the rear end of the bracket. And / or, the rotatable connection between the limiting mechanism and the bracket is located on the rear side of the connection between the bracket and the housing.

5. The typewriter model according to claim 1 or 4, characterized in that: The limiting mechanism includes a limiting gear assembly and a transmission mechanism. The bottom of the printing platform is provided with a rack that meshes with the limiting gear assembly. The limiting gear assembly is rotatably mounted on the housing. One end of the transmission mechanism is rotatably connected to the rear end of the bracket, and the transmission mechanism is connected to the limiting gear assembly.

6. The typewriter model according to claim 5, characterized in that: The transmission mechanism includes a first transmission mechanism and a second transmission mechanism. The front end of the first transmission mechanism is rotatably connected to the rear end of the bracket, the rear end of the first transmission mechanism is connected to the second transmission mechanism, and the second transmission mechanism is connected to the limiting gear assembly. And / or, the first transmission mechanism includes a first connecting plate and a second connecting plate, the front end of the first connecting plate is rotatably connected to the bracket, the rear end of the first connecting plate is rotatably connected to the middle part of the second connecting plate, and the rear end of the second connecting plate is connected to the second transmission mechanism.

7. The typewriter model according to claim 6, characterized in that: The second transmission mechanism includes an escapement device, which includes an escape disc and an escape pawl. The escape disc is rotatably connected to the housing, and the escape pawl is movably connected to the housing. The direction of movement of the escape pawl is parallel to the axis of the escape disc. The escape pawl engages with the escape disc, and the escape disc meshes with the limiting gear assembly, or the escape disc meshes with the limiting gear assembly via a side gear. The rear end of the second connecting plate is connected to the escape pawl. A return spring is provided on the housing, and the return spring provides a return force to the escape pawl to move backward.

8. The typewriter model according to claim 7, characterized in that: The escape pawl is provided with two limiting protrusions at a lateral interval, namely a first limiting protrusion and a second limiting protrusion, and the two limiting protrusions are respectively positioned opposite to the two tooth grooves on the escape plate; And / or, the first limiting tooth and the second limiting tooth are arranged in a staggered manner; When the escape pawl moves forward, the first limiting tooth is disposed in a tooth groove of the escape plate, and the second limiting tooth is disposed on the front side of the escape plate; when the escape pawl moves backward, the first limiting tooth is disposed on the rear side of the escape plate, and the second limiting tooth is disposed in a tooth groove of the escape pawl.

9. The typewriter model according to claim 7, characterized in that: The character belt mechanism includes a character belt, a character belt lifting part, and two pulleys. The character belt lifting part is disposed between the two pulleys and is vertically movable on the housing. The two pulleys are detachably rotatably connected to the housing. The two ends of the character belt are respectively wound around the two pulleys, and the middle part of the character belt is inserted into the character belt lifting part. The bottom of the character strip lifting part is connected to the top of the second connecting plate; And / or, the bottom of the character strip lifting part is connected to the top of the second connecting plate via an intermediate connector.

10. The typewriter model according to claim 9, characterized in that: A transmission gear is rotatably mounted on the housing, and one of the pulleys is detachably connected to the transmission gear; the second transmission mechanism also includes a transmission component, the two ends of which are respectively connected to the limiting gear assembly and the transmission gear. When the limiting gear assembly rotates, it synchronously drives the transmission gear to rotate via the transmission component.

11. The typewriter model according to claim 5, characterized in that: The limiting gear assembly includes a first gear, a second gear, and a ratchet. The first gear is rotatably connected to the housing. The ratchet is coaxially mounted on the side wall of the first gear. The second gear has a ratchet cavity in the middle, and the ratchet is disposed in the ratchet cavity. The second gear meshes with the rack, and the first gear is connected to the transmission mechanism. And / or, when the printing platform and rack move toward the first direction, the rack drives the second gear, ratchet and the first gear to rotate toward the third direction; when the printing platform and rack move toward the second direction, the rack drives the second gear to rotate toward the fourth direction, and the ratchet and the first gear do not rotate accordingly.

12. The typewriter model according to claim 1, characterized in that: The power component includes an elastic reset member, one end of which is connected to the housing and the other end of which is connected to the printing platform. The elastic reset member provides a pulling or pushing force to the printing platform to move in a first direction.

13. The typewriter model according to claim 1, characterized in that: The casing is also provided with a prompting component, and the printing platform is provided with a pusher facing the prompting component. When the printing platform moves to a first position in a first direction, the pusher contacts the prompting component.

14. The typewriter model according to claim 13, characterized in that: The prompting component includes a bell cover and a striking component, the striking component being disposed beside the bell cover; when the printing platform moves to a first position in a first direction, the pushing component contacts the striking component and drives the striking component to rotate; And / or, the housing is provided with a striking element tension spring, one end of which is connected to the striking assembly, and the striking assembly is disposed between the striking element tension spring and the bell cover; the striking element tension spring provides the striking assembly with a pulling force to rotate in the fifth direction.

15. The typewriter model according to claim 14, characterized in that: The striking assembly includes a striking element and a striking connector. The striking element is rotatably mounted on the housing, and the striking connector is rotatably mounted on the striking element, with the striking connector facing the pushing element. A tension spring is connected to the striking element, and the tension spring provides a pulling force to the striking element to rotate in a fifth direction.

16. The typewriter model according to claim 15, characterized in that: The striking component is provided with a mounting groove, which faces the bell cover. The middle part of the striking connector is rotatably mounted in the mounting groove via a pivot. The first end of the striking connector extends out of the mounting groove and is located outside the striking component. The first end of the striking connector is positioned directly opposite the pusher. And / or, a push spring is also provided, one end of which is connected to the striking member, and the other end of which is connected to or in contact with the striking connector, and the contact point between the push spring and the striking connector is located between the rotating shaft and the first end of the striking connector.

17. The typewriter model according to claim 1, characterized in that: The printing platform is provided with a positioning roller and a limiting member. The two ends of the positioning roller are rotatably connected to the printing platform. The limiting member is rotatably disposed on the printing platform. The limiting member can be rotatably disposed on the positioning roller or away from the positioning roller. The text tape mechanism is disposed on the front side of the positioning roller.

18. The typewriter model according to claim 17, characterized in that: One end of the positioning roller is provided with a gripper disc, and the other end of the positioning roller is also provided with an external ratchet; an adjusting component is movably installed on the printing platform, the adjusting component has a cavity inside, the external ratchet is disposed in the cavity, and the size of the cavity is larger than the outer diameter of the external ratchet; a push rod is rotatably installed on the adjusting component, and the end of the push rod abuts against the external ratchet; And / or, the front end of the push rod is rotatably connected to the adjusting member, and the rear end of the push rod abuts against the tooth groove of the external ratchet.

Images