Printing mechanism and POS machine

Abstract

The utility model is suitable for the technical field of payment equipment, and provides a printing mechanism and a POS machine. The printing mechanism is used for the POS machine, and the printing mechanism comprises a paper bin box which is provided with a containing groove, and the containing groove is provided with an opening; the paper bin cover is rotationally mounted on the paper bin box, and the paper bin cover is provided with a cover closing position for covering the opening of the accommodating groove; and the top cover assembly is installed on the paper bin box, the top cover assembly is provided with a top column, and the top column is configured to enable the paper bin cover located at the cover closing position to rotate on the paper bin box so that the opening of the containing groove can be exposed. By the adoption of the operation mode, the opening of the containing groove can be covered or exposed, the situation that the paper bin cover can cover the opening of the containing groove or expose the opening of the containing groove only through a torsional spring is avoided, and then the situation that when the paper bin cover is located at the cover closing position, the paper bin box deforms due to the acting force applied by the torsional spring is avoided; the integrity of the paper bin box is guaranteed, and the service life of the paper bin box is prolonged.

Description

Technical Field

[0001] The present application belongs to the technical field of payment equipment, and more specifically, to a printing mechanism and a POS machine. Background Art

[0002] POS (Point of Sale Machine) is a device used to complete sales transactions, commonly found in retail and service industries such as stores, supermarkets, restaurants, and hotels.

[0003] The paper bin cover in the POS machine in the related art is usually rotatably installed on the paper bin box using a torsion spring to realize functions such as opening and closing the cover. After the paper bin cover is closed, the torsion spring will be twisted to store elastic energy and apply pressing force to the paper bin cover; when the cover needs to be opened, the user can apply a thrust to the paper bin cover that can overcome the torsion force of the torsion spring to open the paper bin cover. During this process, the energy stored in the torsion spring will gradually be released; when the cover needs to be closed, the user can press down the paper bin cover, and the torsion spring will be twisted again and store elastic energy; through the elastic force of the torsion spring, the paper bin cover can realize functions such as opening and closing the cover.

[0004] In order to allow the paper bin box to hold printing paper, the paper bin box is usually slotted. In this case, the strength of the paper bin box itself will be reduced. In addition, the torsion spring will also apply torque to the paper bin cover. Under the influence of the above factors, the paper bin box is prone to deformation. Utility Model Content

[0005] The purpose of the embodiments of the present application is to provide a printing mechanism and a POS machine, aiming to solve the technical problem in the prior art that the paper bin box is prone to deformation.

[0006] To achieve the above-mentioned purpose, according to one aspect of the present application, a printing mechanism is provided for a POS machine, the printing mechanism comprising: a paper bin box, a receiving slot is provided on the paper bin box, and the receiving slot has an opening; a paper bin cover is rotatably mounted on the paper bin box, and the paper bin cover has a closed position covering the opening of the receiving slot; a top cover assembly is mounted on the paper bin box, and the top cover assembly has a top column, and the top column is configured to enable the paper bin cover in the closed position to rotate on the paper bin box to expose the opening of the receiving slot.

[0007] Optionally, the top cover assembly includes a top cover member, a mounting groove is provided on the paper bin box, and the top cover member is arranged in the mounting groove; the top cover member includes a top column and a mounting body, the top column is slidably installed on the mounting body along a first preset direction, the top column has an ejection position outside the mounting groove and an avoidance position retracted into the mounting groove, and in the process of the top column switching from the avoidance position to the ejection position, the top column can push the paper bin cover to rotate on the paper bin box.

[0008] Optionally, the top cover member also includes a first elastomer, which is arranged on the mounting body and is used to push the top column to switch from the avoidance position to the ejection position; the top cover assembly also includes a limit member, which is arranged in the mounting groove, and the limit member has a limit head, and the limit head of the limit member is configured to be able to contact with the top column and prevent the top column from switching from the avoidance position to the ejection position.

[0009] Optionally, the limit member includes a limit body and a second elastic body, the limit body is slidably mounted on the mounting body along a second preset direction, the second preset direction and the first preset direction form an angle with each other; the limit body includes a limit head and a limit body, the limit head is mounted on the limit body, and is configured to be able to slide to a position where the top column slides along the first preset direction; the second elastic body is located on the side of the limit head away from the top column, and the second elastic body is used to push the limit head to slide toward the top column, so that the limit head prevents the top column from switching from the avoidance position to the ejection position.

[0010] Optionally, the limit body also includes an adjusting head, which is installed on a side of the limit body away from the limit head; the top cover assembly also includes an adjusting member, which is slidably installed on the paper bin box along a first preset direction; the adjusting member has a first blocking surface and a second blocking surface that can both contact the adjusting head, and the second blocking surface of the adjusting member is located on the side of the first blocking surface of the adjusting member close to the adjusting head; when the adjusting head contacts the first blocking surface of the adjusting member, the limit head is configured to contact the ejector column and block the ejector column from switching from the avoidance position to the ejection position; when the adjusting head contacts the second blocking surface of the adjusting member, the limit head is configured to slide to a position where the ejector column slides along the first preset direction.

[0011] Optionally, the top cover assembly further includes a reset member, which is disposed on the paper bin box and is used to push the adjustment member to slide toward an opening close to the accommodating groove.

[0012] Optionally, the printing mechanism also includes a rubber roller group and a movement, the rubber roller group is installed on the surface of the paper bin cover close to the paper bin box, and the movement is installed in the accommodating groove; the movement has a switch, the adjusting member has an acting head, and the switch of the movement has a first position and a second position; when the switch of the movement is in the first position, the movement can be connected to the rubber roller group, and when the switch of the movement is in the second position, the movement can be separated from the rubber roller group; the acting head of the adjusting member can drive the switch of the movement to switch from the first position to the second position.

[0013] Optionally, the top column has a limit block, which is used to prevent the top column from leaving the installation groove; a first guide slope is formed on the surface of the limit block of the top column close to the limit head, and a second guide slope is formed on the surface of the limit head close to the top column for fitting with the first guide slope; the limit head is configured to be able to contact the limit block of the top column and prevent the top column from switching from the avoidance position to the ejection position; the first preset direction is perpendicular to the second preset direction.

[0014] Optionally, the paper bin cover also has an open position that exposes the opening of the paper bin box; the printing mechanism also includes a torsion spring, which is installed on the paper bin box, and the torsion spring has two torsion arms that are opposite to each other and both contact the paper bin box; when the paper bin cover is in the closed position, the two torsion arms of the torsion spring are separated from the paper bin cover; when the paper bin cover is in the open position, the two torsion arms of the torsion spring are in contact with the paper bin cover, so as to fix the paper bin cover in the open position.

[0015] According to another aspect of the present application, a POS machine is provided, and the POS machine includes the above-mentioned printing mechanism.

[0016] The beneficial effect of the printing mechanism provided by the present application is that, compared with the prior art, when the opening of the receiving slot in the present application needs to be covered, the paper bin cover is directly driven to rotate on the paper bin box, and the paper bin cover covers the opening of the receiving slot; in this case, when the opening of the receiving slot needs to be exposed, the paper bin cover in the closed position is rotated on the paper bin box by using the top column of the top cover assembly; by adopting the above-mentioned operation method, the opening of the receiving slot can be covered or the opening of the receiving slot can be exposed, thereby avoiding the need for the paper bin cover to rely on a torsion spring to cover the opening of the receiving slot or expose the opening of the receiving slot, thereby avoiding the deformation of the paper bin box due to the force exerted by the torsion spring when the paper bin cover is in the closed position, thereby ensuring the integrity of the paper bin box and extending the service life of the paper bin box. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 A schematic diagram of the structure of a POS terminal in a closed position provided in an embodiment of the present application;

[0019] Figure 2 A schematic diagram of the structure of a POS terminal in an open position provided in an embodiment of the present application at a first viewing angle;

[0020] Figure 3 A schematic diagram of the structure of a POS terminal in an open position provided by an embodiment of the present application at a second viewing angle;

[0021] Figure 4 A schematic diagram of the structure of a POS machine in an open cover position provided by an embodiment of the present application, with the outer frame hidden, from a third viewing angle;

[0022] Figure 5 A first front cross-sectional schematic diagram of a POS terminal in an open cover position provided by an embodiment of the present application;

[0023] Figure 6 A second front cross-sectional schematic diagram of a POS terminal in an open cover position provided by an embodiment of the present application;

[0024] Figure 7 for Figure 6 The enlarged schematic diagram of point A in the middle;

[0025] Figure 8 A simplified structural schematic diagram of a top cover assembly with a top column in an avoidance position provided in an embodiment of the present application;

[0026] Fig. 9 A schematic diagram of the structure of a POS machine in an open cover position provided by an embodiment of the present application, with the outer frame hidden, at a fourth viewing angle;

[0027] Fig.10 for Fig. 9 The enlarged schematic diagram of point B in the middle;

[0028] Fig.11 A schematic diagram of the structure of a torsion spring provided in an embodiment of the present application;

[0029] The reference numerals in the above drawings are as follows:

[0030] 100, paper bin box; 110, box body; 111, receiving slot; 1111, opening; 112, mounting slot; 120, outer frame; 121, adjustment port;

[0031] 200, paper bin cover;

[0032] 300, top cover assembly; 310, top cover member; 311, top column; 3111, limit block; 312, mounting body; 313, first elastic body;

[0033] 320, limiting member; 321, limiting body; 3211, limiting head; 3212, limiting body; 3213, adjusting head; 322, second elastic body;

[0034] 330, adjusting member; 331, adjusting body; 332, adjusting rod; 3321, first blocking surface; 3322, second blocking surface; 3323, action head; 340, resetting member;

[0035] 400, rubber roller assembly; 500, movement; 510, switch; 600, torsion spring; 610, torsion arm. DETAILED DESCRIPTION

[0036] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0037] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or indirectly connected to the other element. In the absence of conflict, the embodiments in this application and the features in the embodiments may be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0039] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] As described in the background technology, currently, a POS machine (full name in English: Point of Sale Machine, Chinese name: Point of Sale Terminal) is a device used to complete sales transactions, which is commonly found in retail and service industries such as stores, supermarkets, restaurants, and hotels. The paper bin cover in the POS machine in the related art is usually rotatably mounted on the paper bin box using a torsion spring to achieve functions such as opening and closing the cover. After the paper bin cover is closed, the torsion spring will be twisted to store elastic energy and apply a pressing force to the paper bin cover; when the cover needs to be opened, the user can apply a thrust to the paper bin cover that can overcome the torsion force of the torsion spring to open the paper bin cover, and in this process, the energy stored in the torsion spring will also be gradually released; when the cover needs to be closed, the user can press down the paper bin cover, and the torsion spring will be twisted again and store elastic energy; through the elastic force of the torsion spring, the paper bin cover can achieve functions such as opening and closing the cover. In order to allow the paper bin box to hold printing paper, the paper bin box is usually slotted. In this case, the strength of the paper bin box itself will be reduced. In addition, the torsion spring will also apply torque to the paper bin cover. Under the influence of the above factors, the paper bin box is prone to deformation.

[0041] Reference Figures 1 to 5 In order to solve the above problems, according to one aspect of the present application, an embodiment of the present application provides a printing mechanism for a POS machine, wherein the printing mechanism includes a paper bin box 100, a paper bin cover 200 and a top cover assembly 300, wherein the paper bin box 100 is provided with a receiving slot 111, and the receiving slot 111 has an opening 1111; the paper bin cover 200 is rotatably mounted on the paper bin box 100, and the paper bin cover 200 has a closed position covering the opening 1111 of the receiving slot 111; the top cover assembly 300 is mounted on the paper bin box 100, and the top cover assembly 300 has a top column 311, and the top column 311 of the top cover assembly 300 is configured to enable the paper bin cover 200 in the closed position to rotate on the paper bin box 100 so that the opening 1111 of the receiving slot 111 is exposed.

[0042] In the embodiment of the present application, the English full name of POS machine is Point of Sale Machine, and its Chinese full name is Point of Sale Terminal; the paper bin box 100 has a mounting surface, and the receiving groove 111 extends from the mounting surface of the paper bin box 100 toward the inside of the paper bin box 100. The receiving groove 111 in the paper bin box 100 is used to receive printing paper. The paper bin cover 200 is generally rotatably installed on the paper bin box 100 by relying on a rotating shaft. Its specific structure belongs to the common knowledge of technicians in this field and will not be elaborated here.

[0043] When the opening 1111 of the receiving slot 111 in the present application needs to be covered, the paper bin cover 200 is directly driven to rotate on the paper bin box 100, and the paper bin cover 200 covers the opening 1111 of the receiving slot 111; in this case, when the opening 1111 of the receiving slot 111 needs to be exposed, the top column 311 of the top cover assembly 300 is used to rotate the paper bin cover 200 in the closed position on the paper bin box 100; by adopting the above-mentioned operation method, the opening 1111 of the receiving slot 111 can be covered or the opening 1111 of the receiving slot 111 can be exposed, thereby avoiding the need for the paper bin cover 200 to rely on the torsion spring to cover the opening 1111 of the receiving slot 111 or expose the opening 1111 of the receiving slot 111, thereby avoiding the deformation of the paper bin box 100 due to the force applied by the torsion spring when the paper bin cover 200 is in the closed position, thereby ensuring the integrity of the paper bin box 100 and extending the service life of the paper bin box 100.

[0044] Reference Figures 4 to 8 In one embodiment, the top cover assembly 300 includes a top cover member 310, a mounting groove 112 is provided on the paper bin box 100, and the top cover member 310 is disposed in the mounting groove 112; the top cover member 310 includes a top column 311 and a mounting body 312, the top column 311 is slidably installed on the mounting body 312 along a first preset direction, and the top column 311 has an ejection position located outside the mounting groove 112 and an avoidance position retracted into the mounting groove 112; when the top column 311 switches from the avoidance position to the ejection position, the top column 311 can push the paper bin cover 200 to rotate on the paper bin box 100.

[0045] The cam 311 is in the position where the top post 311 is in the position of being pushed out of the opening 1111 of the receiving groove 111. When the cam 311 is in the position of being pushed out of the opening 1111 of the receiving groove 111, the top post 311 is driven to slide along the first preset direction toward the direction close to the paper bin cover 200 until the top post 311 slides to the top opening position. At this time, the paper bin cover 200 will be pushed open by the top post 311 and the opening 1111 of the receiving groove 111 is exposed. Before the paper bin cover 200 is in the closing position, the top post 311 is driven to slide along the first preset direction toward the direction away from the paper bin cover 200 until the top post 311 slides to the avoiding position. At this time, the top post 311 will not apply a thrust to the paper bin cover 200, and the paper bin cover 200 can be stably in the closing position to ensure the covering effect. The installation slot 112 provides installation space for the top cover 310 and plays a protective role. On the other hand, it also reduces the overall volume of the printing mechanism. Figures 3 to 7 The top pillars 311 in the embodiment are all in the ejection position. Figure 7 The adjusting head 3213 in the adjusting member 330 contacts the first blocking surface 3321 .

[0046] In addition, in order to allow the top column 311 to slide only along the first preset direction, the paper bin box 100 has a limiting opening for the top column 311 to pass through, and the limiting opening of the paper bin box 100 is connected to the mounting groove 112. At the same time, the mounting body 312 is provided with a limiting groove extending along the first preset direction and for the top column 311 to be inserted; to facilitate the formation of the mounting groove 112, the paper bin box 100 includes a box body 110 and an outer frame 120, the outer frame 120 is sleeved and installed on the outer periphery of the box body 110, the mounting groove 112 is provided on the surface of the box body 110 close to the outer frame 120, and the limiting opening of the paper bin box 100 is provided on the box body 110.

[0047] Reference Figures 6 to 8 In one embodiment, the top cover member 310 also includes a first elastic body 313, which is disposed on the mounting body 312 and is used to push the top column 311 to switch from the avoidance position to the ejection position; the top cover assembly 300 also includes a limit member 320, which is disposed in the mounting groove 112, and the limit member 320 has a limit head 3211, and the limit head 3211 of the limit member 320 is configured to be able to contact the top column 311 and prevent the top column 311 from switching from the avoidance position to the ejection position.

[0048] In this embodiment, the first elastic body 313 is a spring, and the length direction of the first elastic body 313 is generally parallel to the first preset direction. One end of the first elastic body 313 abuts against the top column 311, and the other end of the first elastic body 313 abuts against the mounting body 312. When the top column 311 is in the ejection position, the first elastic body 313 is in a natural telescopic state. When the top column 311 is in the avoidance position, the first elastic body 313 is in a compressed state. When the top column 311 needs to switch from the avoidance position to the ejection position, first separate the limit head 3211 of the limit member 320 from the top column 311, so that the limit head 3211 of the limit member 320 no longer blocks the top column 311 from sliding along the first preset direction, and then the top column 311 will slide toward the paper bin cover 200 along the first preset direction under the elastic force applied by the first elastic body 313, thereby pushing the paper bin cover 200 open; in this case, when the top column 311 needs to be stably kept in the avoidance position, drive the top column 311 to slide along the first preset direction away from the paper bin cover 200, so that the top column 311 switches from the top column 311 position to the avoidance position, and then make the limit head 3211 of the limit member 320 contact with the top column 311, and block the top column 311 from sliding along the first preset direction toward the paper bin cover 200, so that the top column 311 can stably stay in the avoidance position. In addition, Figure 8 The top column 311 in the middle is in the avoidance position.

[0049] In addition, in order to enable the first elastomer 313 to always abut against the top column 311 and the mounting body 312, a limiting column for the first elastomer 313 to be mounted is fixedly installed on the top column 311 and the mounting body 312; in addition, in order to reduce the volume of the top cover assembly 300, a groove is provided on the top column 311, and the limiting column on the top column 311 is installed in the groove, and at the same time, part of the structure of the first elastomer 313 is located in the groove.

[0050] Reference Figures 6 to 8 In one embodiment, the limit member 320 includes a limit body 321 and a second elastic body 322. The limit body 321 is slidably installed on the mounting body 312 along a second preset direction, and the second preset direction forms an angle with the first preset direction; the limit body 321 includes a limit head 3211 and a limit body 3212. The limit head 3211 is installed on the limit body 3212 and is configured to be able to slide to a position where the top column 311 slides along the first preset direction; the second elastic body 322 is located on a side of the limit head 3211 away from the top column 311, and the second elastic body 322 is used to push the limit head 3211 to slide toward the top column 311, so that the limit head 3211 blocks the top column 311 from switching from the avoidance position to the ejection position.

[0051] In this embodiment, the limit head 3211, the limit body 3212 and the second elastic body 322 are all installed in the installation groove 112; the second elastic body 322 is a spring, and the length direction of the second elastic body 322 is parallel to the second preset direction. One end of the second elastic body 322 abuts against the limit head 3211, and the other end of the second elastic body 322 abuts against the groove wall of the installation groove 112; when the limit head 3211 is in a position capable of preventing the top column 311 from switching from the avoidance position to the ejection position, the second elastic body 322 is in a natural telescopic state, and when the limit head 3211 is in a position capable of causing the top column 311 to slide along the first preset direction, the second elastic body 322 is in a compressed state. When the top column 311 needs to slide smoothly along the first preset direction, the limit head 3211 is driven to slide in the direction away from the top column 311 until the top column 311 can slide smoothly along the first preset direction. At this time, the second elastic body 322 is in a compressed state; in this case, when it is necessary to prevent the top column 311 from switching from the avoidance position to the ejection position, the second elastic body 322 is released, and the second elastic body 322 can use its own elastic force to push the limit head 3211 to slide in the direction close to the top column 311, so that the limit head 3211 contacts the top column 311, and can prevent the top column 311 from switching from the avoidance position to the ejection position along the first preset direction. In addition, to facilitate the processing of the limit body 321, the limit head 3211 and the limit body 3212 are integrally formed; to facilitate the assembly of the top cover assembly 300, the first preset direction and the second preset direction are perpendicular to each other; in order to make the limit head 3211 slide only along the second preset direction, a limit frame for inserting the limit head 3211 is installed on the groove wall of the installation groove 112.

[0052] Reference Figure 7 and Figure 8 In one embodiment, the limit body 321 further includes an adjusting head 3213, which is mounted on a side of the limit body 3212 away from the limit head 3211; the top cover assembly 300 further includes an adjusting member 330, which is slidably mounted on the paper bin box 100 along a first preset direction; the adjusting member 330 has a first blocking surface 3321 and a second blocking surface 3322, both of which can contact the adjusting head 3213, and the second blocking surface 3322 of the adjusting member 330 is located at the adjusting position. The first blocking surface 3321 of the member 330 is close to one side of the adjusting head 3213; when the adjusting head 3213 contacts the first blocking surface 3321 of the adjusting member 330, the limiting head 3211 is configured to be able to contact the top column 311 and block the top column 311 from switching from the avoidance position to the ejection position; when the adjusting head 3213 contacts the second blocking surface 3322 of the adjusting member 330, the limiting head 3211 is configured to be able to slide to a position where the top column 311 slides along a first preset direction.

[0053] In this embodiment, the adjusting member 330 includes an adjusting body 331 and an adjusting rod 332 mounted on the adjusting body 331. The first blocking surface 3321 and the second blocking surface 3322 of the adjusting member 330 are both arranged on the adjusting rod 332. The first blocking surface 3321 of the adjusting member 330 is located on the side of the second blocking surface 3322 of the adjusting member 330 away from the top column 311. In this case, if the top column 311 needs to be able to slide smoothly along the first preset direction, the adjusting member 330 needs to be driven to slide along the first preset direction away from the top column 311 so that The adjusting head 3213 contacts the second blocking surface 3322 of the adjusting member 330. At this time, the limiting head 3211 will no longer block the top column 311, and the top column 311 can smoothly switch from the avoidance position to the ejection position along the first preset direction. In this case, if it is necessary to block the top column 311 from switching from the avoidance position to the ejection position, the adjusting member 330 is driven to slide along the first preset direction toward the top column 311, so that the adjusting head 3213 contacts the first blocking surface 3321 of the adjusting member 330. At this time, the limiting head 3211 will block the top column 311. Of course, in other embodiments, the second blocking surface 3322 of the adjusting member 330 can also be located on the side of the first blocking surface 3321 of the adjusting member 330 away from the top column 311. In addition, Figure 7 and Figure 8 The adjusting heads 3213 in the adjusting member 330 are in contact with the first blocking surface 3321 .

[0054] In addition, in order to facilitate the processing of the adjusting member 330, the adjusting body 331 and the adjusting rod 332 are integrally formed; in order to facilitate the processing of the limiting member 320, the adjusting head 3213 and the limiting body 3212 are also integrally formed; in order to enable the adjusting head 3213 to smoothly contact the first blocking surface 3321 and the second blocking surface 3322 of the adjusting member 330, the first blocking surface 3321 is an inclined surface, and the first blocking surface 3321 gradually moves away from the limiting head 3211 from the limiting body 321 to the top column 311 Inclined, the second blocking surface 3322 is also an inclined surface, and the second blocking surface 3322 gradually inclines from the top column 311 to the limiting body 321 in the direction away from the limiting head 3211; in order to make the limiting body 321 slide only along the second preset direction, a limiting strip is installed on the groove wall of the mounting groove 112, and the limiting body 3212 is provided with a limiting hole extending along the second preset direction, and the limiting strip is inserted into the limiting hole; in order to reduce the volume of the printing mechanism and protect the adjusting member 330, the adjusting body 331 is installed in the mounting groove 112.

[0055] Reference Figures 4 to 6 as well as Figure 8 In one embodiment, the top cover assembly 300 further includes a reset member 340 , which is disposed on the paper bin box 100 and is used to push the adjustment member 330 to slide toward the opening 1111 close to the receiving groove 111 .

[0056] In the present embodiment, the reset member 340 is a reset spring, and the length direction of the reset member 340 is generally parallel to the first preset direction. One end of the reset spring abuts against the adjusting member 330, and the other end of the reset spring abuts against the paper bin box 100. When the adjusting member 330 slides along the first preset direction toward away from the top column 311, the reset member 340 is in a compressed state. At this time, if the adjusting member 330 needs to slide along the first preset direction toward close to the top column 311, it only needs to release the adjusting member 330. The adjusting member 330 will slide toward close to the top column 311 under the action of the elastic force applied by the reset member 340, thereby achieving reset.

[0057] In addition, in order to reduce the volume of the top cover assembly 300 and protect the reset member 340, the reset member 340 is installed in the installation groove 112. At this time, the end of the reset member 340 that abuts against the paper bin box 100 will also abut against the groove wall of the installation groove 112. In order to enable the reset member 340 to always abut against the adjustment body 331 and the groove wall of the installation groove 112, a limiting column for the reset member 340 to be mounted is fixedly installed on the surface of the adjustment body 331 away from the top column 311 and on the groove wall of the installation groove 112. In order to further reduce the volume of the top cover assembly 300, the reset member 340 is installed in the installation groove 112. The volume of the top cover assembly 300 is adjusted, and a groove is provided on the surface of the main body 331 away from the top column 311. The limit column on the main body 331 is installed in the groove, and part of the structure of the reset member 340 is located in the groove; in order to facilitate the adjustment member 330 to slide along the first preset direction, an adjustment port 121 is provided on the surface of the paper bin box 100, and the adjustment port 121 is connected to the installation groove 112 to be able to drive the adjustment member 330 to slide along the first preset direction. Specifically, the adjustment port 121 is provided on the surface of the outer frame 120. Figures 2 to 7 as well as Fig. 9 In one embodiment, the printing mechanism further includes a rubber roller group 400 and a movement 500, the rubber roller group 400 is installed on the surface of the paper bin cover 200 close to the paper bin box 100, and the movement 500 is installed in the accommodating groove 111; the movement 500 has a switch 510, the adjusting member 330 has an action head 3323, the switch 510 of the movement 500 has a first position and a second position, when the switch 510 of the movement 500 is in the first position, the movement 500 can be connected to the rubber roller group 400, and when the switch 510 of the movement 500 is in the second position, the movement 500 can be separated from the rubber roller group 400; the action head 3323 of the adjusting member 330 can drive the switch 510 of the movement 500 to switch from the first position to the second position.

[0058] In this embodiment, the action head 3323 of the adjusting member 330 is a part of the adjusting rod 332; the position of the switch 510 of the movement 500 when it is in the first position is located on the side close to the top column 311 of the position of the switch 510 of the movement 500 when it is in the second position; the specific structures of the rubber roller group 400 and the movement 500 are common knowledge to those skilled in the art, and the connection method of the rubber roller group 400 and the movement 500 is also common knowledge to those skilled in the art, and the specific structures and connection methods of the two will not be elaborated in detail here. When the paper bin cover 200 is in the closed position, the switch 510 of the movement 500 is in the first position, and the movement 500 is connected to the rubber roller set 400; when the paper bin cover 200 needs to be rotated on the paper bin box 100 to expose the opening 1111 of the receiving groove 111, the adjusting member 330 is driven to slide along the first preset direction away from the top column 311. During this process, the action head 3323 of the adjusting member 330 drives the switch 510 of the movement 500 to switch from the first position to the second position, so that the rubber roller set 400 and the movement 500 are separated. At the same time, along with the sliding of the adjusting member 330, the adjusting head 3213 will switch from contacting the first blocking surface 3321 of the adjusting member 330 to contacting the second blocking surface 3322 of the adjusting member 330. At this time, the limiting head 3211 will move to a position where the top column 311 can slide along the first preset direction. Under the elastic force of the first elastic body 313, the top column 311 will move in a direction away from the limiting body 321 and push the paper bin cover 200 to rotate on the paper bin box 100, so that the notch of the receiving groove 111 is exposed. In addition, Figures 5 to 7 The switches 510 of the movement 500 are all in the first position.

[0059] Reference Figure 7 and Figure 8 In one embodiment, the top column 311 has a stopper 3111, and the stopper 3111 of the top column 311 is used to prevent the top column 311 from escaping from the mounting groove 112. In this embodiment, the stopper 3111 is a triangular block, and the stopper 3111 is used to prevent the top column 311 from escaping from the limiting opening of the paper bin box 100.

[0060] Reference Figure 7 and Figure 8 In one embodiment, a first guiding slope is formed on the surface of the limit block 3111 of the top column 311 close to the limit head 3211, and a second guiding slope for fitting with the first guiding slope is formed on the surface of the limit head 3211 close to the top column 311; the limit head 3211 is configured to be able to contact the limit block 3111 of the top column 311 and prevent the top column 311 from switching from the avoidance position to the ejection position.

[0061] In this embodiment, the first guide slope is inclined from the top column 311 to the limit body 321 toward the direction away from the limit head 3211, and the second guide slope is inclined from the top column 311 to the limit body 321 toward the direction close to the top column 311, and the inclination direction of the first guide slope intersects with the inclination direction of the second guide slope; the first guide slope and the second guide slope are arranged to facilitate the limit block 3111 of the top column 311 to push the limit head 3211 to slide along the second preset direction to a position where the top column 311 can slide along the first preset direction during the process of switching from the ejection position to the avoidance position, so that the second elastic body 322 is in a compressed state, so that the limit head 3211 blocks the limit block 3111 of the top column 311 under the elastic force of the second elastic body 322.

[0062] Reference Figures 2 to 6 , Figures 9 to 11 In one embodiment, the paper bin cover 200 also has an open cover position that exposes the opening 1111 of the paper bin box 100; the printing mechanism also includes a torsion spring 600, which is installed on the paper bin box 100, and the torsion spring 600 has two torsion arms 610 that are opposite to each other and both contact the paper bin box 100; when the paper bin cover 200 is in the closed position, the two torsion arms 610 of the torsion spring 600 are separated from the paper bin cover 200; when the paper bin cover 200 is in the open cover position, the two torsion arms 610 of the torsion spring 600 are in contact with the paper bin cover 200, so as to fix the paper bin cover 200 in the open cover position.

[0063] In the present embodiment, the torsion spring 600 is in the shape of a "J", and the torsion spring 600 has two ends. Two opposite surfaces on the paper bin box 100 are provided with mounting holes for installing the torsion spring 600, and the two ends of the torsion spring 600 are respectively installed in the two mounting holes. The specific structure of the torsion spring 600 belongs to the common knowledge of those skilled in the art and will not be elaborated in detail here. In the process of switching the paper bin cover 200 from the closed position to the open position, the paper bin cover 200 will gradually come into contact with the two torsion arms 610 of the torsion spring 600, and will apply pressure to the two torsion arms 610 of the torsion spring 600 to twist the two torsion arms 610 of the torsion spring 600. After the paper bin cover 200 is in the open position, the vertical component of the torsion force applied to the paper bin cover 200 by the two torsion arms 610 of the torsion spring 600 is greater than the gravity of the paper bin cover 200, so that the paper bin cover 200 can be fixed at the open position, thereby preventing the paper bin cover 200 from rotating at will on the paper bin box 100. In addition, two mounting holes are provided on two opposite surfaces of the box body 110 .

[0064] Reference Figures 1 to 11 According to another aspect of the present application, an embodiment of the present application further provides a POS machine, which includes the above-mentioned printing mechanism.

[0065] In the embodiment of the present application, the English full name of POS machine is Point of Sale Machine, and its Chinese full name is Point of Sale Terminal; the paper bin box 100 has a mounting surface, and the receiving groove 111 extends from the mounting surface of the paper bin box 100 toward the inside of the paper bin box 100. The receiving groove 111 in the paper bin box 100 is used to receive printing paper. The paper bin cover 200 is generally rotatably installed on the paper bin box 100 by relying on a rotating shaft. Its specific structure belongs to the common knowledge of technicians in this field and will not be elaborated here.

[0066] In summary, the printing mechanism and POS machine provided by the present embodiment have at least the following beneficial technical effects: when the opening 1111 of the receiving slot 111 in the present application needs to be covered, the paper bin cover 200 is directly driven to rotate on the paper bin box 100, and the paper bin cover 200 covers the opening 1111 of the receiving slot 111; in this case, when the opening 1111 of the receiving slot 111 needs to be exposed, the top column 311 of the top cover assembly 300 is used to rotate the paper bin cover 200 in the closed position on the paper bin box 100. That's it; by adopting the above-mentioned operation method, the opening 1111 of the accommodating groove 111 can be covered or the opening 1111 of the accommodating groove 111 can be exposed, thereby avoiding the paper bin cover 200 relying on the torsion spring to cover the opening 1111 of the accommodating groove 111 or expose the opening 1111 of the accommodating groove 111, thereby avoiding the paper bin box 100 from being deformed due to the force applied by the torsion spring when the paper bin cover 200 is in the closed position, thereby ensuring the integrity of the paper bin box 100 and extending the service life of the paper bin box 100.

[0067] The above are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A printing mechanism, characterized in that: Used in a POS machine, the printing mechanism comprises: a paper bin box, the paper bin box is provided with a receiving slot, and the receiving slot has an opening; A paper bin cover is rotatably mounted on the paper bin box, and the paper bin cover has a closed position covering the opening of the receiving slot; A top cover assembly is installed on the paper bin box, and the top cover assembly has a top column, and the top column is configured to enable the paper bin cover in the closed position to rotate on the paper bin box to expose the opening of the accommodating groove.

2. The printing mechanism according to claim 1, characterized in that: The top cover assembly includes a top cover member, the paper bin box is provided with a mounting groove, and the top cover member is arranged in the mounting groove; The top cover member includes the top column and a mounting body, the top column is slidably mounted on the mounting body along a first preset direction, the top column has an ejection position located outside the mounting groove and an avoidance position retracted into the mounting groove, and during the process of the top column switching from the avoidance position to the ejection position, the top column can push the paper bin cover to rotate on the paper bin box.

3. The printing mechanism according to claim 2, characterized in that: The top cover also includes a first elastic body, which is arranged on the mounting body and is used to push the ejector column to switch from the avoidance position to the ejection position; The top cover assembly also includes a limit member, which is arranged in the installation groove. The limit member has a limit head, and the limit head of the limit member is configured to be able to contact the ejector column and prevent the ejector column from switching from the avoidance position to the ejection position.

4. The printing mechanism according to claim 3, characterized in that: The limiting member includes a limiting body and a second elastic body, the limiting body is slidably mounted on the mounting body along a second preset direction, and the second preset direction and the first preset direction form an angle with each other; the limiting body includes a limiting head and a limiting body, the limiting head is mounted on the limiting body, and is configured to be able to slide to a position where the top column slides along the first preset direction; The second elastic body is located on a side of the limit head away from the ejector column, and the second elastic body is used to push the limit head to slide toward the ejector column, so that the limit head blocks the ejector column from switching from the avoidance position to the ejection position.

5. The printing mechanism according to claim 4, characterized in that: The limiting body further comprises an adjusting head, and the adjusting head is mounted on a side of the limiting body away from the limiting head; The top cover assembly further includes an adjusting member, which is slidably mounted on the paper bin box along the first preset direction; the adjusting member has a first blocking surface and a second blocking surface both of which can contact the adjusting head, and the second blocking surface of the adjusting member is located on a side of the first blocking surface of the adjusting member close to the adjusting head; When the adjusting head contacts the first blocking surface of the adjusting member, the limit head is configured to be able to contact the ejector column and block the ejector column from switching from the avoidance position to the ejection position; when the adjusting head contacts the second blocking surface of the adjusting member, the limit head is configured to be able to slide to a position where the ejector column slides along the first preset direction.

6. The printing mechanism according to claim 5, characterized in that: The top cover assembly also includes a reset member, which is arranged on the paper bin box and is used to push the adjustment member to slide toward an opening close to the accommodating groove.

7. The printing mechanism according to claim 5, characterized in that: The printing mechanism further comprises a rubber roller group and a movement, wherein the rubber roller group is mounted on the surface of the paper bin cover close to the paper bin box, and the movement is mounted in the receiving groove; The movement has a switch, the adjusting member has an operating head, and the switch of the movement has a first position and a second position; when the switch of the movement is in the first position, the movement can be connected to the rubber roller group, and when the switch of the movement is in the second position, the movement can be separated from the rubber roller group; the operating head of the adjusting member can drive the switch of the movement to switch from the first position to the second position.

8. The printing mechanism according to claim 4, characterized in that: The top column has a limit block, and the limit block of the top column is used to prevent the top column from leaving the installation groove; a first guiding inclined surface is formed on the surface of the limit block of the top column close to the limit head, and a second guiding inclined surface used for abutting with the first guiding inclined surface is formed on the surface of the limit head close to the top column; the limit head is configured to be able to contact the limit block of the top column and prevent the top column from switching from the avoidance position to the ejection position; The first preset direction and the second preset direction are perpendicular to each other.

9. The printing mechanism according to any one of claims 1 to 8, characterized in that: The paper bin cover also has an open position that exposes the opening of the paper bin box; the printing mechanism also includes a torsion spring, which is installed on the paper bin box, and has two torsion arms that are opposite to each other and both contact the paper bin box; when the paper bin cover is in the closed position, the two torsion arms of the torsion spring are separated from the paper bin cover; when the paper bin cover is in the open position, the two torsion arms of the torsion spring are in contact with the paper bin cover, so as to fix the paper bin cover at the open position.

10. A POS machine, characterized in that: The POS machine comprises the printing mechanism according to any one of claims 1 to 9.

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