Printer

Abstract

The utility model relates to the technical field of printing, in particular to a printer, which comprises a first rack, a second rack, a printing rubber roller assembly, a printing head assembly and a driving assembly, the first rack and the second rack are movably connected, and the second rack can move between a working position and a maintenance position relative to the first rack; the printing rubber roller assembly comprises a shaft sleeve arranged on the first rack, a core shaft rotationally inserted into the shaft sleeve and a roller fixedly arranged on the core shaft in a sleeving manner; the printing head assembly comprises a movable frame movably connected with the second rack and a printing head arranged on the movable frame, when the second rack is located at the working position, an open groove of the movable frame is connected with the shaft sleeve in a clamped mode, the printing head is oppositely matched with the roller, and a driving piece of the driving assembly drives the movable frame to always have the trend of moving in the first direction relative to the second rack. The groove wall of the open groove abuts against the periphery of the shaft sleeve, so that the positions of the printing head and the roller in the moving direction of the sheet medium are determined, and the printing precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a printer. Background Art

[0002] The printer provided by the related technology includes a first frame, a second frame, a printing rubber roller assembly and a printing head assembly. The second frame is movably connected to the first frame, and the second frame can move relative to the first frame, and has a working position and a maintenance position. The printing rubber roller assembly includes a shaft sleeve arranged on the first frame, a core shaft rotatably inserted into the shaft sleeve, and a roller fixedly sleeved on the core shaft; the printing head assembly includes a bracket and a printing head, the bracket is movably connected to the second frame, the printing head is arranged on the bracket, and is used to print on thin-sheet media. The bracket is provided with an opening groove. When the second frame is located at the working position, the printing head and the roller are relatively matched, and the opening groove is engaged with the shaft sleeve to limit the position of the printing head relative to the roller. The thin-sheet media passes between the printing head and the roller. At this time, the roller rotates to drive the thin-sheet media to move, and the printing head can print text, images and other contents on the surface of the thin-sheet media; when the second frame is located at the maintenance position, the printing head is separated from the roller, and the opening groove is separated from the shaft sleeve. At this time, the roller and the printing head can be cleaned, or the stuck thin-sheet media can be cleared.

[0003] However, in order to ensure smooth engagement between the opening groove and the sleeve, the printer provided by the related technology usually makes the width of the opening groove slightly larger than the outer diameter of the sleeve. Therefore, when the opening groove and the sleeve are engaged, there is a certain gap margin between the sleeve and the groove wall of the opening groove along the moving direction of the sheet medium, resulting in uncertainty in the position of the opening groove of the bracket relative to the sleeve along the moving direction of the sheet medium, which in turn causes the position of the print head relative to the roller to be unstable, affecting the printing accuracy of the print head. Utility Model Content

[0004] The utility model aims to provide a printer to solve the problem of unstable position of a print head relative to a roller along the moving direction of a sheet medium, thereby improving the printing accuracy of the print head.

[0005] The utility model provides a printer, which includes:

[0006] First rack;

[0007] A second frame is movably connected to the first frame, and the second frame can move relative to the first frame to have a working position and a maintenance position;

[0008] The printing rubber roller assembly comprises a shaft sleeve arranged on the first frame, a core shaft rotatably plugged into the shaft sleeve, and a roller wheel fixedly sleeved on the core shaft;

[0009] The print head assembly comprises a movable frame and a print head, wherein the first end of the movable frame is movably connected to the second frame, the second end of the movable frame is provided with an open slot, and the print head is arranged on the movable frame; when the second frame is located at the working position, the open slot is engaged with the shaft sleeve, and the print head is relatively matched with the roller; when the second frame is located at the maintenance position, the open slot is disengaged from the shaft sleeve, and the print head is separated from the roller;

[0010] The driving assembly includes a driving member connected to the second frame. When the second frame is located at the working position, the driving member drives the movable frame to always have a tendency to move along the first direction relative to the second frame, so that the groove wall of the open groove abuts against the outer periphery of the sleeve.

[0011] As a preferred technical solution of the printer, the second frame includes a cover body and a pressure plate, the cover body is pivotally connected to the first frame via a first pivot axis, the pressure plate is pivotally connected to the cover body via a second pivot axis, the first pivot axis and the second pivot axis are arranged parallel and spaced apart, and the movable frame is rotatably connected to the pressure plate;

[0012] The printer also includes a first elastic member connected between the pressure plate and the cover body. When the second frame is located at the working position, the first elastic member is configured to provide the pressure plate with an elastic force so that the pressure plate drives the movable frame to rotate along the first direction around the second pivot axis, and enables the movable frame to drive the print head to press the roller along the extension direction of the opening groove.

[0013] As a preferred technical solution of the printer, the second frame is pivotally connected to the first frame, and the second frame can rotate relative to the first frame along the first direction to the working position or along the second direction to the maintenance position, and the first direction and the second direction are opposite;

[0014] The movable frame is rotatably connected to the second frame. When the second frame is located at the working position, the driving member drives the movable frame to always have a tendency to rotate relative to the second frame along the first direction.

[0015] As a preferred technical solution of the printer, the driving member is pivotally connected to the second frame via a rotating shaft, and the driving assembly also includes a second elastic member, which is connected to the driving member. The driving member can rotate under the action of the second elastic member and drive the movable frame to move relative to the second frame along the first direction so that the groove wall of the open groove abuts against the outer periphery of the sleeve.

[0016] As a preferred technical solution of the printer, the driving member includes a first plate, a second plate and a third plate connected in sequence at an angle, the second plate and the second frame are pivotally connected through the rotating shaft, the second elastic member is connected between the third plate and the second frame, and when the second frame is in the working position, under the action of the second elastic member, the driving member can rotate around the axis of the rotating shaft so that the first plate drives the movable frame to move relative to the second frame along the first direction, so that the groove wall of the open groove abuts against the outer periphery of the sleeve.

[0017] As a preferred technical solution of the printer, the driving member is slidably connected to the second frame, and the driving assembly also includes a third elastic member, which is connected between the second frame and the driving member. When the second frame is located in the working position, the driving member can translate relative to the second frame under the action of the third elastic member, and the driving member drives the movable frame to move relative to the second frame along the first direction so that the groove wall of the open groove abuts against the outer periphery of the sleeve.

[0018] As a preferred technical solution of the printer, the movable frame includes a support column, and the second frame includes a support groove. When the second frame is located at the maintenance position, under the joint action of the first elastic member and the driving member, the support column abuts against the groove wall of the support groove; when the second frame is located at the working position, the support column is spaced apart from the groove wall of the support groove.

[0019] As an optimal technical solution for the printer, one of the pressure plate and the movable frame is provided with a spherical groove, and the other of the pressure plate and the movable frame is provided with a spherical protrusion adapted to the spherical groove, and the spherical protrusion cooperates with the spherical groove in a ball joint so that the movable frame can rotate relative to the pressure plate.

[0020] As a preferred technical solution of the printer, the printer includes two first elastic members connected between the pressure plate and the cover body, along the axial direction of the second pivot axis, the spherical groove is centrally arranged on the pressure plate, and the two first elastic members are symmetrically arranged on both sides of the spherical groove.

[0021] As a preferred technical solution of the printer, the opening groove includes a first side wall and a second side wall that are parallel and spaced apart, and a bottom wall connected between the first side wall and the second side wall, and an opening opposite to the bottom wall is formed between the first side wall and the second side wall. When the second frame is located in the working position, the core shaft is located between the first side wall and the second side wall and spaced apart from the bottom wall. The driving member drives the movable frame to move along the first direction so that the first side wall abuts against the outer periphery of the sleeve.

[0022] The printer provided by the utility model has at least the following beneficial effects:

[0023] The printer comprises a first frame, a second frame, a printing rubber roller assembly, a printing head assembly and a driving assembly. The second frame is movably connected to the first frame, and the second frame can move relative to the first frame and has a working position and a maintenance position; the printing rubber roller assembly comprises a sleeve arranged on the first frame, a core shaft rotatably plugged into the sleeve, and a roller fixedly sleeved on the core shaft; the printing head assembly comprises a movable frame and a printing head, the first end of the movable frame is movably connected to the second frame, the second end of the movable frame is provided with an opening groove, and the printing head is arranged on the movable frame; when the second frame is located at the working position, the opening groove is engaged with the sleeve, and the printing head is relatively matched with the roller; when the second frame is located at the maintenance position, the opening groove is disengaged from the sleeve, and the printing head is separated from the roller; the driving assembly comprises a driving member connected to the second frame, and when the second frame is located at the working position, the driving member drives the movable frame to always have a tendency to move relative to the second frame along the first direction, so that the groove wall of the opening groove abuts against the outer periphery of the sleeve. The printer provided by the utility model, when the second frame is located at the working position, the driving member drives the movable frame to make the groove wall of the open groove abut against the shaft sleeve, which can determine the position of the open groove relative to the shaft sleeve along the moving direction of the sheet medium, so that the relative position of the print head and the roller along the moving direction of the sheet medium is kept stable, thereby improving the printing accuracy of the print head on the sheet medium. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic cross-sectional structure diagram of a printer in an embodiment of the utility model;

[0025] Figure 2 The local structure of the printer in the embodiment of the utility model is shown in FIG. Figure 1 (the second frame is in the working position);

[0026] Figure 3 The local structure of the printer in the embodiment of the utility model is shown in FIG. Figure 2 (The second rack is in the maintenance position);

[0027] Figure 4 The exploded view of the local structure of the printer in the embodiment of the utility model Figure 1 ;

[0028] Figure 5 for Figure 1 Magnified view at A in the middle;

[0029] Figure 6 The exploded view of the local structure of the printer in the embodiment of the utility model Figure 2 ;

[0030] Figure 7 for Figure 4 Magnified view at B in the middle;

[0031] Figure 8 for Figure 2 Enlarged view at center C;

[0032] Fig. 9 for Figure 3 Magnified view at D in the middle;

[0033] Fig.10 The local structure of the printer in the embodiment of the utility model is shown in FIG. Figure 3 .

[0034] In the figure:

[0035] 1. first frame; 11. housing;

[0036] 2. Second frame; 21. Cover body; 211. First pivot axis; 212. Guide groove; 213. Support groove; 214. Support wall; 215. Limit wall; 22. Press plate; 221. Second pivot axis; 222. Guide axis; 223. Spherical groove; 224. Limit column; 225. Side wall;

[0037] 3. Printing rubber roller assembly; 31. Bushing; 32. Mandrel; 33. Roller;

[0038] 4. Print head assembly; 41. Movable frame; 411. Opening slot; 412. Support column; 413. First side wall; 414. Second side wall; 415. Bottom wall; 416. Spherical protrusion; 417. Limiting slot; 42. Print head;

[0039] 5. driving assembly; 51. driving member; 511. first plate; 512. second plate; 513. third plate; 514. plug post; 515. through hole; 52. rotating shaft; 53. fastener;

[0040] 61. a first elastic member; 62. a second elastic member;

[0041] 71. Card compartment; 72. Card receiving box;

[0042] 8. Conveying assembly; 81. Conveying roller; 82. Driven roller. DETAILED DESCRIPTION

[0043] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0044] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0045] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0046] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0047] This embodiment provides a printer, which can be used to print sheet media. In this embodiment, the sheet media printed by the printer is specifically a card, and in other embodiments, the sheet media printed by the printer can also be paper, bills, etc.

[0048] Please refer to Figures 1 to 5The printer includes a first frame 1, a second frame 2, a printing rubber roller assembly 3, a printing head assembly 4 and a driving assembly 5. The second frame 2 is movably connected to the first frame 1, and the second frame 2 can move relative to the first frame 1 and has a working position and a maintenance position; the printing rubber roller assembly 3 includes a sleeve 31 arranged on the first frame 1, a core shaft 32 rotatably plugged into the sleeve 31 and a roller 33 fixedly sleeved on the core shaft 32; the printing head assembly 4 includes a movable frame 41 and a printing head 42, the first end of the movable frame 41 is movably connected to the second frame 2, and the second end of the movable frame 41 is provided with an opening slot 411, and the printing head 42 is provided with a printing head 42. The print head 42 is arranged on the movable frame 41; when the second frame 2 is in the working position, the opening groove 411 is engaged with the shaft sleeve 31, and the print head 42 is matched with the roller 33; when the second frame 2 is in the maintenance position, the opening groove 411 is disengaged from the shaft sleeve 31, and the print head 42 is separated from the roller 33; the driving assembly 5 includes a driving member 51 connected to the second frame 2, and when the second frame 2 is in the working position, the driving member 51 drives the movable frame 41 to always have a relative movement along the first direction (such as Figure 1 In the printer provided in this embodiment, when the second frame 2 is in the working position, the driving member 51 drives the movable frame 41 to move in the first direction relative to the second frame 2, so that the wall of the open slot 411 abuts against the outer periphery of the shaft sleeve 31, and the moving direction of the open slot 411 relative to the shaft sleeve 31 (such as the moving direction of the sheet medium) can be determined. Figure 1 The position of the print head 42 and the roller 33 along the moving direction of the sheet medium is kept stable, thereby improving the printing accuracy of the print head 42 on the sheet medium.

[0049] In this embodiment, when the second frame 2 is located in the maintenance position, the direction in which the groove wall of the opening groove 411 abuts the sleeve 31 can be parallel to the moving direction of the sheet medium, or can be at a certain angle to the moving direction of the sheet medium. As long as the stable abutment between the opening groove 411 and the roller 33 can be ensured, the stability of the relative positions of the print head 42 and the roller 33 can be ensured in the moving direction of the sheet medium.

[0050] Optionally, see Figure 1In this embodiment, the printer further includes a card bin 71, a card receiving box 72, and a conveying assembly 8. The card bin 71 is arranged on the first frame 1, and is used to accommodate the card and output the card to the print head 42. The card receiving box 72 is arranged on the first frame 1 and is located below the card bin 71. The card receiving box 72 is used to receive the card printed by the print head 42. The conveying assembly 8 includes a conveying roller 81 and a driven roller 82 matched with the conveying roller 81. The conveying roller 81 and the driven roller 82 are both rotatably connected to the first frame 1. When the conveying roller 81 and the driven roller 82 rotate, they are used to clamp and drive the card to move between the print head 42 and the roller 33. The print head 42 is used to complete the printing operation on the card. Preferably, the printer includes a plurality of conveying assemblies 8, and the plurality of conveying assemblies 8 are arranged at intervals along the moving direction of the sheet medium.

[0051] Please refer again Figures 1 to 6 The second frame 2 includes a cover body 21 and a pressure plate 22. The cover body 21 is pivotally connected to the first frame 1 through a first pivot axis 211. The pressure plate 22 is pivotally connected to the cover body 21 through a second pivot axis 221. The first pivot axis 211 and the second pivot axis 221 are arranged in parallel and spaced apart. The movable frame 41 is rotatably connected to the pressure plate 22. The printer also includes a first elastic member 61 connected between the pressure plate 22 and the cover body 21. When the second frame 2 is in the working position, the first elastic member 61 is configured to provide an elastic force to the pressure plate 22 so that the pressure plate 22 drives the movable frame 41 to rotate around the second pivot axis 221 in the first direction, and enables the movable frame 41 to drive the print head 42 along the extension direction of the opening slot 411 (such as Figure 1 In this way, when the second frame 2 is located at the working position, the first elastic member 61 gives the pressing plate 22 an elastic force, and driven by the elastic force, the pressing plate 22 drives the movable frame 41 to rotate around the second pivot shaft 221 along the first direction, which can increase the power of the movable frame 41 to rotate along the first direction, thereby ensuring that the groove wall of the opening groove 411 can reliably abut against the shaft sleeve 31; in addition, under the action of the elastic force of the first elastic member 61, the movable frame 41 can also drive the print head 42 to elastically press against the roller 33, and when sheet media of different thicknesses pass between the print head 42 and the roller 33, it can ensure that the print head 42 has sufficient printing pressure on the sheet media.

[0052] Specifically, in this embodiment, the line between the rotation center of the movable frame 41 relative to the pressure plate 22 and the axis of the second pivot shaft 221 is the first line, the line between the rotation center of the movable frame 41 relative to the pressure plate 22 and the axis of the roller 33 (that is, the axis of the sleeve 31) is the second line, and the line between the axis of the second pivot shaft 221 and the axis of the roller 33 is the third line. The first line and the second line are arranged at an angle. When the second frame 2 is in the working position, the axis of the first pivot shaft 211 and the axis of the roller 33 are fixed, and only the rotation center of the movable frame 41 relative to the pressure plate 22 is movable, and the open groove 411 on the movable frame 41 is plugged into the sleeve 31. Therefore, when the pressure plate 22 drives the movable frame 41 to rotate around the second pivot shaft 221 along the first direction, the lengths of the first line and the third line remain unchanged, while the length of the second line is variable. Specifically, when the pressing plate 22 rotates relative to the cover body 21 along the first direction around the second pivot axis 221, the rotation center of the movable frame 41 relative to the pressing plate 22 will gradually approach the third connecting line, and the length of the second connecting line will gradually shorten, so that the depth of the opening groove 411 of the movable frame 41 inserted into the shaft sleeve 31 gradually increases. At the same time, the movable frame 41 drives the print head 42 to gradually approach and press against the roller 33 along the extension direction of the opening groove 411, thereby achieving the effect of the print head 42 elastically pressing against the roller 33. Preferably, the first elastic member 61 is a compression spring. In other embodiments, the first elastic member 61 can also be set as a tension spring or a disc spring as required.

[0053] Optionally, see Figures 2 to 4 , one of the cover body 21 and the pressing plate 22 is provided with a guide shaft 222, and the other of the two is provided with a guide groove 212 adapted to the guide shaft 222, the axis of the guide shaft 222 is parallel to the axis of the second pivot shaft 221 and is arranged at intervals, the guide shaft 222 is plugged and matched with the guide groove 212, the guide groove 212 is in an arc shape, and the center of the guide groove 212 coincides with the axis of the second pivot shaft 221. In this way, when the pressing plate 22 is installed on the cover body 21, the pressing plate 22 can be supported by the groove wall of the guide groove 212, so as to facilitate the installation of the pressing plate 22; the overall structural strength of the pressing plate 22 is also improved by the cooperation between the guide shaft 222 and the guide groove 212; in addition, the two ends of the guide groove 212 in the extension direction are respectively abutted against the guide shaft 222 to limit the rotation range of the guide shaft 222, thereby limiting the rotation angle of the pressing plate 22 relative to the cover body 21. Among them, this embodiment exemplifies a solution of setting a guide groove 212 on the cover body 21 and setting a guide shaft 222 on the pressure plate 22. In other embodiments, the guide shaft 222 can be set on the pressure plate 22 and the guide groove 212 can be set on the cover body 21 as needed.

[0054] As an alternative solution, the second frame 2 can be moved between the working position and the maintenance position along the extension direction of the opening slot 411, and the movable frame 41 is slidably connected with the second frame 2 along a set direction. When the second frame 2 is located at the working position, the driving member 51 drives the movable frame 41 to slide relative to the second frame 2 along the set direction so that the slot wall of the opening slot 411 abuts against the shaft sleeve 31. Such a configuration can also ensure that the slot wall of the opening slot 411 abuts against the shaft sleeve 31 reliably. Preferably, the set direction is parallel to the moving direction of the sheet medium. In other embodiments, the set direction may also be at an angle to the moving direction of the sheet medium.

[0055] Optionally, see Figure 1 In this embodiment, the first frame 1 includes a housing 11, and the housing 11 is provided with an opening. When the second frame 2 is located at the working position, the cover 21 closes the opening, and when the second frame 2 is located at the maintenance position, the cover 21 opens the opening. In this way, when the second frame 2 is located at the working position, the opening can be closed by the cover 21 to protect the components in the opening; when the second frame 2 is located at the maintenance position, the opening can be opened by the cover 21 to facilitate maintenance of the components in the opening.

[0056] Optionally, see Figure 2 and Figure 3 The second frame 2 is pivotally connected to the first frame 1, and the second frame 2 can rotate along a first direction to a working position or along a second direction to a maintenance position relative to the first frame 1, and the first direction and the second direction are opposite; the movable frame 41 is rotatably connected to the second frame 2, and the driving member 51 drives the movable frame 41 to always have a tendency to rotate along the first direction relative to the second frame 2. Such arrangement enables the driving force of the driving member 51 on the movable frame 41 to not only make the groove wall of the opening groove 411 abut against the outer periphery of the sleeve 31 when the second frame 2 is in the working position, but also when the second frame 2 rotates to the maintenance position, the driving member 51 drives the movable frame 41 to deflect along the first direction, so that the opening groove 411 gradually disengages from the sleeve 31, and the opening groove 411 also synchronously deflects along the first direction relative to the sleeve 31, which can avoid the sleeve 31 from blocking the groove wall of the opening groove 411, so as to ensure that the opening groove 411 and the sleeve 31 can be smoothly disengaged, and ensure that the second frame 2 can smoothly rotate to the maintenance position relative to the first frame 1, so as to ensure normal maintenance of the printer.

[0057] Optionally, the second frame 2 includes a limiting portion, and when the second frame 2 rotates to the maintenance position, the limiting portion abuts against the movable frame 41, and is used to limit the deflection angle of the movable frame 41 along the first direction under the action of the driving member 51. The setting of the limiting portion can prevent the movable frame 41 from being deflected too much relative to the second frame 2 along the first direction under the action of the driving member 51, thereby affecting the smoothness of the engagement between the open groove 411 and the shaft sleeve 31 during the rotation of the second frame 2 to the working position.

[0058] Optionally, see Figure 4 and Figure 7 In this embodiment, the driving member 51 is pivotally connected to the second frame 2 through the rotating shaft 52, and the driving assembly 5 further includes a second elastic member 62, which is connected to the driving member 51. When the second frame 2 is in the working position, the driving member 51 can rotate under the action of the second elastic member 62 and drive the movable frame 41 to move relative to the second frame 2 along the first direction, so that the groove wall of the opening groove 411 abuts against the outer periphery of the sleeve 31. In this way, the driving member 51 has a tendency to rotate relative to the second frame 2 under the drive of the second elastic member 62, so that the driving member 51 can always give the movable frame 41 the power to move along the first direction, thereby ensuring that the groove wall of the opening groove 411 can reliably abut against the sleeve 31. Preferably, the second elastic member 62 is a compression spring. In other embodiments, the second elastic member 62 can also be set as a tension spring or a disc spring as required. In other embodiments, the driving member 51 includes a spring, one end of which is connected to the movable frame 41, and the other end is connected to the second frame 2, and the spring causes the movable frame 41 to always have a tendency to rotate along the first direction; or, the driving member 51 is an elastomer that can produce elastic deformation, and when the elastomer produces elastic deformation, it generates a driving force to drive the movable frame 41 to move along the first direction; or, the first end of the driving member 51 is pivotally connected to the second frame 2 through a rotating shaft, and the second end of the driving member 51 includes a counterweight block, which always has a tendency to rotate around the axis of the rotating shaft and abut against the movable frame 41 under the action of its own gravity; or, the driving member 51 includes a linear actuator such as a cylinder or an electric cylinder, and the linear actuator drives the movable frame 41 to reciprocate along the first direction.

[0059] As an alternative solution, the driving member 51 is slidably connected to the second frame 2, and the driving assembly 5 further includes a third elastic member, which is connected between the second frame 2 and the driving member 51. When the second frame 2 is in the working position, the driving member 51 can translate relative to the second frame 2 under the action of the third elastic member, and the driving member 51 drives the movable frame 41 to move relative to the second frame 2 along the first direction, so that the groove wall of the opening groove 411 abuts against the outer periphery of the sleeve 31. In this way, the driving member 51 has a tendency to translate relative to the second frame 2 under the drive of the third elastic member, so that the driving member 51 can also always give the movable frame 41 the power to move along the first direction, and ensure that the groove wall of the opening groove 411 can reliably abut against the sleeve 31. Preferably, the third elastic member is a compression spring. In other embodiments, the third elastic member can also be set as a tension spring or a disc spring as required.

[0060] Optionally, see Figure 7In this embodiment, the driving member 51 includes a first plate 511, a second plate 512 and a third plate 513 connected in sequence at an angle, the second plate 512 is pivotally connected to the second frame 2 through the rotating shaft 52, and the second elastic member 62 is connected between the third plate 513 and the second frame 2. When the second frame 2 is in the working position, under the action of the second elastic member 62, the driving member 51 can rotate around the axis of the rotating shaft 52 so that the first plate 511 drives the movable frame 41 to move relative to the second frame 2 along the first direction, so that the groove wall of the opening groove 411 abuts against the outer periphery of the shaft sleeve 31. In this way, under the action of the second elastic member 62, the driving member 51 can reliably drive the movable frame 41. Specifically, in this embodiment, the first plate 511 and the second plate 512 are vertically connected, the second plate 512 and the third plate 513 are vertically connected, and the first plate 511 and the third plate 513 are vertically connected. Preferably, the second elastic member 62 is a compression spring, and a plug post 514 is provided on the third plate 513. The compression spring is sleeved on the plug post 514, which can ensure the stability of the deformation direction of the second elastic member 62 and improve the reliability of the second elastic member 62. Further preferably, a through hole 515 is provided on the second plate 512, and the rotating shaft 52 is rotatably inserted into the through hole 515 and connected to the rotating shaft 52 through a fastener 53 to limit the position of the driving member 51 and the rotating shaft 52 in the axial direction of the rotating shaft 52. In other embodiments, the second elastic member 62 is also configured as a tension spring or a torsion spring.

[0061] Optionally, see Figure 2 , Figure 3 , Figure 8 and Fig. 9The movable frame 41 includes a support column 412, and the second frame 2 includes a support groove 213. When the second frame 2 is located at the maintenance position, under the joint action of the first elastic member 61 and the driving member 51, the support column 412 abuts against the groove wall of the support groove 213; when the second frame 2 is located at the working position, the support column 412 is spaced apart from the groove wall of the support groove 213. In this way, when the second frame 2 is located at the maintenance position, the second frame 2 can stably support the support column 412, and then the second frame 2 can stably support the movable frame 41, and limit the rotation range of the movable frame 41 relative to the second frame 2 along the first direction under the action of the driving member 51, thereby improving the stability of the relative position of the print head assembly 4 and the second frame 2; when the second frame 2 is located at the working position, the support column 412 is spaced from the groove wall of the support groove 213, and the movable frame 41 has a certain movement space, so that under the action of the first elastic member 61, the movable frame 41 can drive the print head 42 to move along the extension direction of the opening groove 411 and enable the print head 42 to be pressed against the roller 33, thereby improving the printing effect; at the same time, under the action of the driving member 51, the groove wall of the opening groove 411 can reliably abut against the outer periphery of the shaft sleeve 31, thereby improving the stability of the printer in the working state. Specifically, in this embodiment, the support groove 213 is provided on the cover body 21, and the limiting portion is specifically the groove wall of the support groove 213. Preferably, the support groove 213 has a support wall 214 and a limiting wall 215 at an angle, and when the second frame 2 is located at the maintenance position, the support column 412 abuts against the support wall 214 and is supported by the support wall 214 under the action of the first elastic member 61, and the support column 412 moves relative to the second frame 2 and abuts against the limiting wall 215 under the action of the driving member 51, so as to limit the rotation range of the movable frame 41 along the first direction. Further preferably, when the second frame 2 is located at the working position, the first plate 511 abuts against the support column 412 tangentially, and is used to drive the movable frame 41 to move relative to the second frame 2 along the first direction.

[0062] Optionally, see Figure 4 and Figure 5 , one of the pressing plate 22 and the movable frame 41 is provided with a spherical groove 223, and the other of the pressing plate 22 and the movable frame 41 is provided with a spherical protrusion 416 adapted to the spherical groove 223, and the spherical protrusion 416 and the spherical groove 223 are ball-jointed, so that the movable frame 41 can rotate relative to the pressing plate 22. In this way, the spherical protrusion 416 can roll relative to the spherical groove 223, so that the movable frame 41 can rotate relative to the pressing plate 22 with the spherical groove 223 as a fulcrum, thereby improving the smoothness of the rotation of the movable frame 41 relative to the pressing plate 22. Specifically, in this embodiment, an exemplary solution of providing the spherical groove 223 on the pressing plate 22 and providing the spherical protrusion 416 on the movable frame 41 is given. In other embodiments, the spherical protrusion 416 can also be provided on the pressing plate 22, and the spherical groove 223 can be provided on the movable frame 41.

[0063] As an alternative, see Fig.10 One of the second frame 2 and the movable frame 41 is provided with a limiting groove 417, and the other of the two is provided with a limiting column 224. The limiting column 224 is plugged into the limiting groove 417 and abuts against the side wall 225 of the limiting groove 417. The movable frame 41 can deflect with the abutting position of the limiting column 224 and the side wall 225 of the limiting groove 417 as a fulcrum. Specifically, in this embodiment, the limiting groove 417 is provided on the movable frame 41, and the limiting column 224 is provided on the second frame 2. In other embodiments, the limiting groove 417 can also be provided on the second frame 2, and the limiting column 224 can be provided on the movable frame 41.

[0064] Optionally, see Figure 4 The printer includes two first elastic members 61 connected between the pressing plate 22 and the cover 21. Along the axial direction of the second pivot axis 221, the spherical groove 223 is centrally arranged on the pressing plate 22, and the two first elastic members 61 are symmetrically arranged on both sides of the spherical groove 223. In this way, under the action of the two first elastic members 61, the spherical groove 223 can be reliably matched with the spherical protrusion 416.

[0065] Optionally, see Figure 2 The opening groove 411 includes a first side wall 413 and a second side wall 414 which are arranged in parallel and spaced apart, and a bottom wall 415 which is connected between the first side wall 413 and the second side wall 414. An opening which is opposite to the bottom wall 415 is formed between the first side wall 413 and the second side wall 414. When the second frame 2 is located at the working position, the mandrel 32 is located between the first side wall 413 and the second side wall 414 and spaced apart from the bottom wall 415. The driving member 51 drives the movable frame 41 to move along the first direction so that the first side wall 413 abuts against the outer periphery of the sleeve 31. Such a configuration improves the reliability of the abutment between the groove wall of the opening groove 411 and the outer periphery of the sleeve 31 when the second frame 2 is located at the working position. In this embodiment, the opening groove 411 is a U-shaped structure. In other embodiments, the opening groove 411 may also be a V-shaped structure.

[0066] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. A printer, characterized in that: include: A first frame (1); A second frame (2) is movably connected to the first frame (1), and the second frame (2) can move relative to the first frame (1) to have a working position and a maintenance position; A printing rubber roller assembly (3), comprising a shaft sleeve (31) arranged on the first frame (1), a core shaft (32) rotatably plugged into the shaft sleeve (31), and a roller (33) fixedly sleeved on the core shaft (32); A print head assembly (4), comprising a movable frame (41) and a print head (42); a first end of the movable frame (41) is movably connected to the second frame (2); a second end of the movable frame (41) is provided with an opening slot (411); and the print head (42) is arranged on the movable frame (41); when the second frame (2) is located at the working position, the opening slot (411) is engaged with the shaft sleeve (31), and the print head (42) is relatively matched with the roller (33); when the second frame (2) is located at the maintenance position, the opening slot (411) is disengaged from the shaft sleeve (31), and the print head (42) is separated from the roller (33); A driving assembly (5) comprises a driving member (51) connected to the second frame (2); when the second frame (2) is located at the working position, the driving member (51) drives the movable frame (41) to always have a tendency to move relative to the second frame (2) along a first direction, so that the groove wall of the opening groove (411) abuts against the outer periphery of the shaft sleeve (31).

2. The printer according to claim 1, characterized in that: The second frame (2) comprises a cover body (21) and a pressure plate (22); the cover body (21) is pivotally connected to the first frame (1) via a first pivot axis (211); the pressure plate (22) is pivotally connected to the cover body (21) via a second pivot axis (221); the first pivot axis (211) and the second pivot axis (221) are arranged parallel to each other and spaced apart; the movable frame (41) is rotatably connected to the pressure plate (22); The printer further comprises a first elastic member (61) connected between the pressure plate (22) and the cover body (21); when the second frame (2) is located at the working position, the first elastic member (61) is configured to provide the pressure plate (22) with an elastic force so that the pressure plate (22) drives the movable frame (41) to rotate along the first direction around the second pivot axis (221), and enables the movable frame (41) to drive the print head (42) to press the roller (33) along the extension direction of the opening slot (411).

3. The printer according to claim 1 or 2, characterized in that: The second frame (2) is pivotally connected to the first frame (1), and the second frame (2) can rotate relative to the first frame (1) along the first direction to the working position or along the second direction to the maintenance position, and the first direction and the second direction are opposite; The movable frame (41) is rotatably connected to the second frame (2), and the driving member (51) drives the movable frame (41) to always have a tendency to rotate relative to the second frame (2) along the first direction.

4. The printer according to claim 1 or 2, characterized in that: The driving member (51) is pivotally connected to the second frame (2) via a rotating shaft (52). The driving assembly (5) further comprises a second elastic member (62). The second elastic member (62) is connected to the driving member (51). When the second frame (2) is located at the working position, the driving member (51) can rotate under the action of the second elastic member (62) and drive the movable frame (41) to move relative to the second frame (2) along the first direction, so that the groove wall of the opening groove (411) abuts against the outer periphery of the shaft sleeve (31).

5. The printer according to claim 4, characterized in that: The driving member (51) comprises a first plate (511), a second plate (512) and a third plate (513) which are connected in sequence at an angle, the second plate (512) and the second frame (2) are pivotally connected via the rotating shaft (52), the second elastic member (62) is connected between the third plate (513) and the second frame (2), and when the second frame (2) is located at the working position, under the action of the second elastic member (62), the driving member (51) can rotate around the axis of the rotating shaft (52) so that the first plate (511) drives the movable frame (41) to move relative to the second frame (2) along the first direction, so that the groove wall of the opening groove (411) abuts against the outer periphery of the shaft sleeve (31).

6. The printer according to claim 1 or 2, characterized in that: The driving member (51) is slidably connected to the second frame (2), and the driving assembly (5) further comprises a third elastic member, wherein the third elastic member is connected between the second frame (2) and the driving member (51); when the second frame (2) is located at the working position, the driving member (51) can translate relative to the second frame (2) under the action of the third elastic member, and the driving member (51) drives the movable frame (41) to move relative to the second frame (2) along the first direction, so that the groove wall of the opening groove (411) abuts against the outer periphery of the shaft sleeve (31).

7. The printer according to claim 2, characterized in that: The movable frame (41) comprises a support column (412), and the second frame (2) comprises a support groove (213); when the second frame (2) is located at the maintenance position, under the joint action of the first elastic member (61) and the driving member (51), the support column (412) abuts against a groove wall of the support groove (213); when the second frame (2) is located at the working position, the support column (412) is spaced apart from the groove wall of the support groove (213).

8. The printer according to claim 2, characterized in that: One of the pressure plate (22) and the movable frame (41) is provided with a spherical groove (223), and the other of the pressure plate (22) and the movable frame (41) is provided with a spherical protrusion (416) adapted to the spherical groove (223). The spherical protrusion (416) and the spherical groove (223) are ball-jointed to enable the movable frame (41) to rotate relative to the pressure plate (22).

9. The printer according to claim 8, characterized in that: The printer comprises two first elastic members (61) connected between the pressure plate (22) and the cover body (21); along the axial direction of the second pivot axis (221), the spherical groove (223) is centrally arranged on the pressure plate (22), and the two first elastic members (61) are symmetrically arranged on both sides of the spherical groove (223).

10. The printer according to claim 1 or 2, characterized in that: The opening groove (411) comprises a first side wall (413) and a second side wall (414) which are parallel and spaced apart, and a bottom wall (415) connected between the first side wall (413) and the second side wall (414); an opening opposite to the bottom wall (415) is formed between the first side wall (413) and the second side wall (414); when the second frame (2) is located at the working position, the core shaft (32) is located between the first side wall (413) and the second side wall (414) and spaced apart from the bottom wall (415); the driving member (51) drives the movable frame (41) to move along the first direction so that the first side wall (413) abuts against the outer periphery of the shaft sleeve (31).

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