Printer

Abstract

The printer comprises a host and a cover assembly, and the host is provided with a bearing part used for bearing a to-be-printed piece; the cover assembly comprises a first movable cover and a second movable cover, the first movable cover is movably connected with the host and provided with a window, and the first movable cover is used for abutting against the to-be-printed piece located on the bearing part when in the cover closing state and exposing the pressed state of the to-be-printed piece through the window; the second movable cover is movably connected with the host, and the second movable cover covers the bearing part in a closed state so as to carry out printing operation. According to the printer, an operator can abut against the to-be-printed piece through the first movable cover and observe the fixing state of the to-be-printed piece through the window, and if it is found that the to-be-printed piece is inclined after being fixed, the position of the to-be-printed piece can be adjusted in time, and the situation that the printing effect is affected due to the fact that the to-be-printed piece is inclined after being fixed is effectively avoided; therefore, the high-quality printing effect is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to a printer. BACKGROUND

[0002] With the wide application of printers, the requirement for printing quality is also higher and higher, and the line number tube printer is one of them. The line number tube printer can accurately print identification information for various cables, greatly facilitating the installation, management, maintenance and troubleshooting of the cable work flow.

[0003] Generally speaking, the printer mainly consists of a main machine and a cover. A print head for performing a printing task is installed on the main machine. When performing a printing operation, the to-be-printed object needs to be installed on the main machine first, for example, the line number tube is arranged on the main machine, and then the cover is closed to fix the to-be-printed object, so that the print head can accurately print it.

[0004] However, after the cover is closed, the fixing state of the to-be-printed object is completely hidden and the operator cannot directly observe it. In the actual installation process of the to-be-printed object, due to the interference of various human factors, such as the shaking of the operator's hands, or it is difficult to ensure uniformity during the force application process, it is extremely likely that the to-be-printed object will be in a skewed state when the cover is closed. As a result, the relative position between the print head and the to-be-printed object will deviate, and the printed content will present serious problems such as blurring, ghosting or misplacement, which is difficult to meet the demand for high-quality printing. UTILITY MODEL CONTENT

[0005] The printer provided by the embodiments of the present application can observe the fixing state of the to-be-printed object before printing, so as to avoid the to-be-printed object from being skewed after being fixed and affecting the printing effect.

[0006] In order to achieve the above-mentioned purpose, the printer provided by the embodiments of the present application comprises:

[0007] a main machine having a bearing part for bearing a to-be-printed object; and

[0008] a cover assembly comprising:

[0009] a first movable cover movably connected with the main machine and having a window, the first movable cover being used to press the to-be-printed object on the bearing part when in a closed state, and the pressed state of the to-be-printed object being exposed through the window; and

[0010] a second movable cover movably connected with the main machine, the second movable cover covering the bearing part when in a closed state to perform a printing operation.

[0011] In some embodiments, the first movable cover comprises a first cover body and at least one pressing arm connected to the first cover body, one of the first cover body and the pressing arm is movably connected to the main body, and the pressing arm and the first cover body jointly form the window.

[0012] In some embodiments, the first movable cover comprises a first cover body and two pressing arms connected to the first cover body and spaced apart along the conveying direction of the object to be printed, one of the first cover body and the pressing arms is movably connected to the main body, and the two pressing arms and the first cover body jointly form the window.

[0013] In some embodiments, the first movable cover is rotatably connected to the main body, and the second movable cover is rotatably connected to the main body, and the first movable cover is not linked with the second movable cover during the rotation of the first movable cover from the open cover state to the closed cover state.

[0014] In some embodiments, the second movable cover is linked with the first movable cover during the rotation of the second movable cover from the open cover state to the closed cover state, so as to drive the first movable cover to rotate to the closed cover state.

[0015] In some embodiments, the second movable cover comprises a second cover body and a driving arm connected to the second cover body, the driving arm is rotatably connected to the main body, the first movable cover comprises a first cover body and a pressing arm connected to the first cover body, the pressing arm comprises a pressing arm body for pressing the object to be printed and a linkage arm body for linking the driving arm, the linkage arm body is connected to the pressing arm body and rotatably connected to the main body.

[0016] The cover assembly further comprises a transmission member rotatably connected to the main body, one end of the transmission member is connected to the linkage arm body, and the other end of the transmission member is used for abutting against the driving arm.

[0017] In some embodiments, the rotation direction of the first movable cover and the rotation direction of the second movable cover each comprises an open cover direction and a closed cover direction opposite to each other, the second movable cover is in the open cover state, and when the first movable cover rotates along the closed cover direction, the linkage arm body drives the transmission member to rotate, and the transmission member does not interfere with the driving arm, so that the first movable cover is not linked with the second movable cover during the rotation of the first movable cover from the open cover state to the closed cover state; when the second movable cover rotates along the closed cover direction, the driving arm abuts against the transmission member, drives the transmission member to rotate along the open cover direction, and the transmission member drives the pressing arm and the first cover body to rotate along the closed cover direction to drive the first movable cover to rotate to the closed cover state.

[0018] In some embodiments, the transmission member comprises:

[0019] a connecting portion connected with the linkage arm body; and

[0020] an abutting portion connected with the connecting portion at an angle, used for abutting with the driving arm, and the abutting portion is rotationally connected with the main machine at the connection with the connecting portion.

[0021] In some embodiments, when the first movable cover is in the closed state, a first distance between an end of the connecting portion away from the abutting portion and the driving arm is not less than 1 mm and not more than 10 mm.

[0022] In some embodiments, the cover assembly further comprises:

[0023] a resilient member, one end of the resilient member is connected with the end of the connecting portion away from the abutting portion, and the other end of the resilient member is connected with the linkage arm body;

[0024] wherein, when the first movable cover and the second movable cover are both in the closed state, the resilient member stores elastic potential energy; and after the second movable cover is opened, the resilient member releases the elastic potential energy to drive the first movable cover to open.

[0025] In some embodiments, the resilient member comprises one of a tension spring and an elastic rubber member.

[0026] In some embodiments, the driving arm has a first contact surface, the abutting portion has a second contact surface for abutting with the first contact surface, and the contact form of the first contact surface with the second contact surface is linear contact.

[0027] In some embodiments, the first contact surface is an arc surface, and the second contact surface is a plane.

[0028] and / or, the length of the linear contact is not less than 5 mm and not more than 20 mm.

[0029] In some embodiments, the main machine further has an avoidance slot for the linkage arm body of the abutting arm to extend into, and the part of the linkage arm body extending into the avoidance slot is spaced apart from the slot wall of the avoidance slot.

[0030] In some embodiments, the part of the linkage arm body extending into the avoidance slot has two side surfaces perpendicular to the rotation axis of the linkage arm body, and the second distance between the side surfaces and the slot wall of the avoidance slot is not less than 1 mm and not more than 4 mm.

[0031] In some embodiments, when the first movable cover is in the limit position of opening, the angle between the linkage arm body and the horizontal plane is not less than 5° and not more than 85°.

[0032] In the printer provided by the embodiment of the present application, the first movable cover is movably connected with the main body and has a window, and when the first movable cover is in the closed state, the first movable cover presses the to-be-printed object on the bearing part and exposes the pressed state of the to-be-printed object through the window. In this way, before printing, the operator can press the to-be-printed object through the first movable cover and observe the fixing state of the to-be-printed object through the window. If it is found that the fixed to-be-printed object is skewed, the position of the to-be-printed object can be adjusted in time, so as to effectively avoid the influence of the skewed to-be-printed object on the printing effect after the to-be-printed object is fixed, thereby guaranteeing the high-quality printing effect. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0034] Figure 1 A structural schematic diagram of a printer bearing a to-be-printed object is provided for the embodiment of the present application;

[0035] Figure 2 A structural schematic diagram of a printer is provided for the embodiment of the present application;

[0036] Figure 3 A structural schematic diagram of a first movable cover is provided for the embodiment of the present application;

[0037] Figure 4 A structural schematic diagram of a printer with a hidden part of the main body structure is provided for the embodiment of the present application;

[0038] Figure 5 A structural schematic diagram of a driving arm, a transmission member, an elastic member and a pressing arm is provided for the embodiment of the present application;

[0039] Figure 6 Another structural schematic diagram of a printer bearing a to-be-printed object is provided for the embodiment of the present application;

[0040] Figure 7 A structural schematic diagram of a printer is provided for the embodiment of the present application; Figure 6 An enlarged view of A in FIG. 8.

[0041] BRIEF DESCRIPTION OF DRAWINGS

[0042] 1, host; 11, base; 100, bearing part; 200, window; 300, avoiding slot; 2, cover assembly; 21, first movable cover; 211, first cover body; 212, pressing arm; 2121, pressing arm body; 2122, linkage arm body; 22, second movable cover; 221, second cover body; 222, driving arm; 2221, first contact surface; 23, transmission member; 231, connecting part; 232, abutting part; 2321, second contact surface; 24, elastic member; 3, to-be-printed piece.

[0043] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will further describe the embodiments of the present application in combination with the drawings.

[0045] The following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all the embodiments consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0046] In the description of the present application, it is understood that the terms "first", "second" and the like are used only for the purpose of description and can not be understood as indicating or implying relative importance. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, unless otherwise specified, "multiple" means two or more. "And / or", the association between the associated objects, means that there can be three relationships, for example, A and / or B, which can represent the existence of A, the existence of A and B, and the existence of B. The character " / " generally represents the relationship between the front and rear associated objects is "or".

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0048] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationship in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present application. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0049] With the wide application of printers, the requirements for printing quality are also getting higher and higher.

[0050] Generally speaking, a printer mainly consists of a main body and a cover. A print head for performing a printing task is installed on the main body. When printing is performed, the object to be printed is first installed on the main body, and then the cover is closed to fix the object to be printed, so that the print head can accurately print the object to be printed.

[0051] However, after the cover is closed, the fixing state of the object to be printed is completely hidden and cannot be directly observed by the operator. In actual operation, due to the interference of various human factors, such as the shaking of the operator's hands or the difficulty in ensuring uniformity during the force application, it is very likely that the object to be printed will be in a skewed state when the cover is closed. As a result, the relative position between the print head and the object to be printed will be deviated, which will cause the printed content to be blurred, ghosted or misaligned, and other serious problems, which is difficult to meet the needs of high-quality printing.

[0052] To this end, the embodiments of the present application provide a printer which can observe the fixing state of the object to be printed before printing, so as to avoid the object to be printed from being skewed after being fixed and affecting the printing effect.

[0053] Specifically, please refer to Figures 1 to 3 , Figure 1 a structural schematic view of a printer provided by the embodiments of the present application and carrying an object to be printed; Figure 2 a structural schematic view of a printer provided by the embodiments of the present application; Figure 3 a structural schematic view of a first movable cover provided by the embodiments of the present application.

[0054] The printer of the embodiment can be applied to various types, such as a cable tube printer, a label printer, a barcode printer, etc. Correspondingly, the to-be-printed piece 3 can be in various forms, such as a cable tube, various labels, barcode paper, etc. Among them, the cable tube printer is a printer used for printing marks, such as numbers, letters, symbols, etc. on the cable tube to mark the cable. In the following, the printer of the embodiment will be described as a cable tube printer, and the to-be-printed piece 3 will be described as a cable tube.

[0055] The printer of the embodiment includes a host 1 and a cover assembly 2. The host 1 is the core bearing part 100 of the entire printer, which includes a base 11 and a printing assembly and a tube feeding assembly mounted on the base 11. The print head in the printing assembly is a component for realizing the printing of the identification information of the cable tube, and can accurately print characters, numbers or symbols on the surface of the cable tube according to the preset instructions. The conveying roller of the tube feeding assembly is used to convey the cable tube. The base 11 has a bearing part 100 for bearing the cable tube. For example, the bearing part 100 of the embodiment is a cable routing groove formed on the base 11. The cable tube is arranged in the cable routing groove on the base 11 and passes through the conveying roller. The conveying roller gradually conveys the cable tube to the corresponding position of the print head through the rotating motion, so as to ensure the smooth performance of the printing operation.

[0056] The cover assembly 2 is a key component for guaranteeing the printing quality of the embodiment, which includes a first movable cover 21 and a second movable cover 22. The first movable cover 21 is movably connected with the base 11, and the movable connection mode can adopt structures such as hinges and sliding rails, so as to ensure that the first movable cover 21 can be flexibly opened and closed, and facilitate the installation and position adjustment of the cable tube. The first movable cover 21 has a window 200, which can be an opening or a through hole directly formed on the first movable cover 21. The size of the window 200 can be set according to the length of the cable routing groove, so as to as far as possible display the fixing state of the cable tube, such as the contact details of the cable tube with the cable routing groove and the first movable cover 21.

[0057] In the closed state, the first movable cover 21 can press the cable tube against the cable routing groove. The pressing action of the first movable cover 21 on the cable tube when closing can be realized by the internal structure thereof. Exemplarily, on the inner side of the first movable cover 21, a pressing component is arranged at the position corresponding to the cable tube. The pressing component can be a rubber pad with a certain elasticity or a soft plastic protrusion. When the first movable cover 21 is closed, the pressing component contacts the cable tube and applies a certain pressure, so that the cable tube is fixed in the cable routing groove and is prevented from deviating in the printing process. During the pressing process, the operator can observe the pressed state of the cable tube through the window 200.

[0058] The first movable cover 21 of the embodiment can be embedded on the second movable cover 22. For example, the second movable cover 22 has a mounting cavity, and the first movable cover 21 can be mounted in the mounting cavity to be embedded on the second movable cover 22. When the first movable cover 21 is embedded on the second movable cover 22, the first movable cover 21 is hidden inside the second movable cover 22 in the initial state, and the entire cover assembly 2 appears to be a relatively simple overall structure from the appearance. In addition, the first movable cover 21 can also be located between the second movable cover 22 and the base 11. In this way, when the second movable cover 22 and the first movable cover 21 are in the closed state at the same time, the first movable cover 21 directly contacts and presses the cable tube when it is closed, so that the pressing relationship between the first movable cover 21 and the cable tube is more direct, and the cable tube can be more stably fixed.

[0059] The second movable cover 22 of the embodiment is also connected to the base 11 in a movable manner, and its main function is to cover the bearing part 100 after closing to create a closed, stable and minimally disturbed environment for printing operation, thereby effectively guaranteeing the accuracy and stability of the printing process.

[0060] When printing the cable tube, the operator places the cable tube on the cable groove of the base 11, then closes the first movable cover 21, and the first movable cover 21 presses the cable tube. At this time, through the window 200 of the first movable cover 21, the operator can directly see the fixed state of the cable tube. If any skew phenomenon of the cable tube is found, the operator can quickly open the first movable cover 21 and adjust the position of the cable tube to restore it to the relative accurate position with the print head, effectively avoiding the printing quality problem caused by the deviation of the position of the cable tube. During the printing process, since the cable tube always maintains an accurate and correct position, the print head of the printer can print characters, numbers, symbols and other marks on the cable tube in a complete and clear manner with extremely high accuracy, greatly improving the printing accuracy and quality of the cable tube marks.

[0061] In some embodiments, the first movable cover 21 includes a first cover body 211 and at least one pressing arm 212 connected thereto, one of the first cover body 211 and the pressing arm 212 is movably connected to the base 11, and the pressing arm 212 and the first cover body 211 jointly form the window 200.

[0062] The first cover body 211 is the main part of the first movable cover 21, which can be designed in shape and size according to the bearing part 100 of the base 11, and is made of a material with certain strength and stability, such as engineering plastic or metal sheet. The connection between the pressing arm 212 and the first cover body 211 is firm and reliable, which can be achieved by welding, one-piece molding or high-strength bolt connection. For example, when using one-piece molding, the first cover body 211 and the pressing arm 212 are molded at one time by a mold when the first movable cover 21 is manufactured, so as to ensure the strength and integrity of the connecting part 231.

[0063] The pressing arm 212 is a component that directly contacts and exerts pressure on the wire number tube, and is made of a material with certain elasticity and wear resistance, such as rubber or plastic. The number of the pressing arm 212 can be set according to the length of the wire number tube. When the number of the pressing arm 212 is two, the two pressing arms 212 are arranged at intervals along the conveying direction of the wire number tube, and the two pressing arms 212 are arranged together with the first cover body 211 to form the window 200. The interval arrangement of the two pressing arms 212 along the conveying direction of the wire number tube has multiple meanings. On the one hand, during the closing of the cover, the two pressing arms 212 can exert pressure on the wire number tube from different positions, so that the wire number tube is more evenly stressed, and displacement or deformation of the wire number tube caused by excessive single-point pressure is avoided. On the other hand, the space between the two pressing arms 212 forms the window 200, and the position and size of the window 200 can allow the operator to clearly observe the key parts of the wire number tube, such as whether the axis is parallel to the movement direction of the print head, and whether the wire number tube is in good contact with the wire slot. During the closing process of the cover, the two pressing arms 212 first contact the wire number tube and gradually exert pressure to stably fix the wire number tube in the wire slot. At this time, the operator can check the fixing effect through the window 200, and if there is a problem, the first movable cover 21 can be opened in time to adjust the position of the wire number tube.

[0064] Please refer to Figure 4 and Figure 5 , Figure 4 the structure schematic diagram of the printer provided by the embodiment of the application after hiding part of the structure of the host 1; Figure 5 the structure schematic diagram of the driving arm 222, the transmission member 23, the elastic member 24 and the pressing arm 212 provided by the embodiment of the application.

[0065] The first movable cover 21 of the embodiment does not affect the second movable cover 22 during rotation, and the second movable cover 22 can interact with the first movable cover 21 during opening and closing.

[0066] Specifically, the pressing arm 212 of the first movable cover 21 comprises a pressing arm body 2121 for pressing the cable number tube and a linkage arm body 2122 for linkage driving the arm 222. The linkage arm body 2122 is rotationally connected with the base 11, and the rotational connection can be achieved by a rotation shaft penetrating the linkage arm body 2122 and the base 11, or by a hinge structure. The linkage arm body 2122 is angularly connected with the pressing arm body 2121, so that the pressing arm 212 can effectively press the cable number tube and play a key role in linkage with the second movable cover 22. For example, when the first movable cover 21 rotates from the open cover state to the closed cover state, the pressing arm body 2121 gradually approaches the cable number tube and applies pressure to stably fix the cable number tube in the cable groove. In this process, the first movable cover 21 is not linked with the second movable cover 22, so it does not interfere with the second movable cover 22, ensuring the independence of each movement.

[0067] The second movable cover 22 comprises a second cover body 221 and a driving arm 222 connected with each other. The second cover body 221 covers the bearing part 100 of the main machine 1 in the closed cover state, providing a relatively closed and stable environment for printing operation and reducing the interference of external factors such as dust and air flow on the printing process. The driving arm 222 is a key component for linkage with the first movable cover 21. The driving arm 222 is rotationally connected with the base 11, and the rotational connection can be achieved by a rotation shaft penetrating the linkage arm body 2122 and the base 11, or by a hinge structure. In the process of rotating the second movable cover 22 from the open cover state to the closed cover state, the driving arm 222 is linked with the linkage arm body 2122 of the first movable cover 21 through the transmission member 23 to drive the first movable cover 21 to rotate to the closed cover state. In this way, only the second movable cover 22 needs to be operated to drive the first movable cover 21 to automatically close, greatly reducing the operation steps and improving the convenience of operation. For example, when printing the cable number tube, the operator does not need to perform complicated operations on the two cover bodies, saving time and effort.

[0068] The transmission member 23 is a key component for the linkage between the second movable cover 22 and the first movable cover 21. Specifically, the transmission member 23 is rotationally connected to the base 11 of the main machine 1, and includes a connecting portion 231 and an abutting portion 232. The connecting portion 231 is connected to the linkage arm body 2122 of the pressing arm 212, and the connection can be in an elastic manner to ensure that the linkage arm body 2122 does not disengage during linkage. The abutting portion 232 is connected to the connecting portion 231 at an angle, and is used to abut against the driving arm 222. The connection between the abutting portion 232 and the connecting portion 231 is rotationally connected to the base 11. In this way, the transmission member 23 can transmit power during the linkage between the first movable cover 21 and the second movable cover 22. When the second movable cover 22 rotates in the closing direction (counterclockwise in the figure), the driving arm 222 abuts against the abutting portion 232 of the transmission member 23, causing the transmission member 23 to rotate in the opening direction (clockwise in the figure). Since the connecting portion 231 of the transmission member 23 is connected to the linkage arm body 2122 of the first movable cover 21, the transmission member 23 drives the pressing arm 212 and the first cover body 211 to rotate in the closing direction, thereby driving the first movable cover 21. When the first movable cover 21 rotates in the closing direction, the linkage arm body 2122 drives the transmission member 23 to rotate, and the transmission member 23 does not interfere with the driving arm 222 at this time, ensuring the smoothness of the closing action of the first movable cover 21.

[0069] When the first movable cover 21 is in the closed state, the end of the connecting portion 231 away from the abutting portion 232 has a first spacing with the driving arm 222, and the first spacing is limited to a range of not less than 1 mm and not more than 10 mm. If the first spacing is less than 1 mm, during the operation of the printer, the connecting portion 231 is prone to collision or friction with the driving arm 222 due to internal mechanical vibration, temperature change and other factors. Such interference can cause damage to the surface of the components, thereby reducing the service life of the printer. When the first spacing is greater than 10 mm, the driving arm 222 is prone to reduce the transmission efficiency of the force when driving the transmission member 23 to rotate due to the overlong force arm or the non-compact force transmission path.

[0070] Further, the cover assembly 2 of the embodiment further comprises an elastic member 24, one end of the elastic member 24 is connected with the connecting part 231 away from one end of the abutting part 232, and the other end is connected with the linkage arm body 2122 of the abutting arm 212. The elastic member 24 can be a tension spring or an elastic rubber member and the like having elastic recovery capability. When the first movable cover 21 and the second movable cover 22 are both in the closed cover state, the elastic member 24 stores elastic potential energy. For example, when the second movable cover 22 drives the first movable cover 21 to close, the elastic member 24 is stretched or compressed and stores a certain amount of energy. After the second movable cover 22 is opened, the elastic member 24 releases the elastic potential energy to drive the first movable cover 21 to open. In this way, the automation of the cover opening is realized, and the convenience of operation is further improved. For example, when the printing is completed, the operator opens the second movable cover 22, and the first movable cover 21 will be automatically opened to a certain angle under the action of the elastic member 24, which is convenient for the operator to take out the thread tube or perform other operations.

[0071] Further, the elastic member 24 is selected as a tension spring, which provides auxiliary power in the linkage process of the first movable cover 21 and the second movable cover 22. When the first movable cover 21 is in the limit position of opening, the included angle between the linkage arm body 2122 of the abutting arm 212 and the horizontal plane is not less than 5° and not greater than 85°. If the included angle is less than 5°, the distance between the abutting arm body 2121 of the abutting arm 212 and the bearing part 100 is too small, and the operator's hand has difficulty in smoothly placing the thread tube on the bearing part 100 when installing the thread tube, which increases the difficulty of thread tube installation. On the contrary, if the included angle is greater than 85°, the torque of the tension spring on the linkage arm body 2122 is too small at this angle. Because the torque of the tension spring is closely related to the included angle, when the included angle is too large, the component of the tension of the spring in the direction perpendicular to the linkage arm body 2122 decreases, and it is difficult to effectively pull the linkage arm body 2122, so that the second movable cover 22 needs to overcome greater resistance when driving the first movable cover 21 to close, and even it can not be able to smoothly realize the closing action, which affects the normal use of the printer.

[0072] The driving arm 222 of the embodiment as a key component of the second movable cover 22 has a first contact surface 2221. The first contact surface 2221 is designed as an arc surface. The design of the arc surface has multiple meanings. On the one hand, the arc surface can better adapt to different motion states and stress conditions when in contact with the abutting part 232. For example, during the opening and closing process of the second movable cover 22, due to the change of the motion trajectory, the arc surface can smoothly make transitional contact with the second contact surface 2321 of the abutting part 232, reducing the impact and wear caused by the sudden contact. On the other hand, compared with a plane, the arc surface can disperse the pressure to a certain extent, avoid local stress concentration, and improve the durability of the driving arm 222.

[0073] The abutting portion 232 of the transmission member 23 has a second contact surface 2321 for abutting against the first contact surface 2221, and the second contact surface 2321 is a plane. The contact form between the abutting portion 232 and the driving arm 222 is linear contact, and the length of the linear contact is not less than 5 mm and not more than 20 mm. If the length of the linear contact is less than 5 mm, although the contact area is further reduced, due to the too short contact length, the machining precision and assembly precision of the components are extremely high in the force transmission process, and slight deviation will cause unstable force transmission. When the length of the linear contact is greater than 20 mm, although the stability of the contact is improved, the volume of the components is increased, and the structure of the entire cover assembly 2 becomes less compact.

[0074] Please refer to Figure 6 and Figure 7 , Figure 6 Another structural schematic diagram of a printer carrying the to-be-printed piece 3 provided by the embodiment of the present application is shown in FIG. 6. Figure 7 is Figure 6 an enlarged view of A in FIG. 5.

[0075] The base 11 of the embodiment also has an avoidance slot 300 for the linkage arm body 2122 of the abutting arm 212 to extend into. The shape, size and position of the avoidance slot 300 can be designed according to the linkage arm body 2122. The shape of the avoidance slot 300 is matched with the outer contour of the linkage arm body 2122, and sufficient space is provided for the linkage arm body 2122 during rotation. The depth of the avoidance slot 300 is sufficient to accommodate the maximum displacement of the linkage arm body 2122 during rotation, so as to ensure that the linkage arm body 2122 will not collide with other parts of the base 11. For example, during the entire rotation process of the first movable cover 21 from opening to closing, the linkage arm body 2122 can freely rotate in the avoidance slot 300 without being hindered by the structure of the base 11, effectively avoiding the problem of poor or impossible rotation of the first movable cover 21 due to interference between the base 11 and the linkage arm body 2122, and ensuring the smoothness and stability of the rotation of the first movable cover 21.

[0076] The part of the linkage arm body 2122 extending into the avoidance slot 300 has two side surfaces perpendicular to the rotation axis of the linkage arm body 2122, and the second spacing between the side surfaces and the slot wall of the avoidance slot 300 is not less than 1 mm and not more than 4 mm. If the second spacing is less than 1 mm, due to the slight deformation of the components caused by internal vibration, temperature change and other factors during the operation of the printer, the side surfaces of the linkage arm body 2122 are prone to contact and collide with the slot wall of the avoidance slot 300, thereby reducing the service life of the first movable cover 21. When the second spacing is greater than 4 mm, although the collision can be effectively avoided, the structure of the base 11 becomes less compact, and the overall volume of the printer is increased.

[0077] The above merely provides preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, and improvement made in the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A printer characterized by comprising: The application relates to a cover assembly of a printer. The cover assembly comprises: a first movable cover movably connected with the main body and provided with a window, the first movable cover being used to press the print object on the bearing part when the first movable cover is in a closed state and expose the pressed state of the print object through the window; and a second movable cover movably connected with the main body, the second movable cover covering the bearing part when the second movable cover is in a closed state to perform a printing operation. The first movable cover comprises a first cover body and at least one pressing arm connected with each other, one of the first cover body and the pressing arm is movably connected with the main body, and the pressing arm and the first cover body jointly form the window. The first movable cover comprises a first cover body and two pressing arms arranged at intervals along the conveying direction of the print object, one of the first cover body and the pressing arms is movably connected with the main body, and the two pressing arms and the first cover body jointly form the window. The first movable cover is rotatably connected with the main body, the second movable cover is rotatably connected with the main body, and the first movable cover is not linked with the second movable cover during the rotation of the first movable cover from an open state to a closed state.

2. The printer of claim 1, wherein, The second movable cover is linked with the first movable cover during the rotation of the second movable cover from an open state to a closed state to drive the first movable cover to rotate to the closed state.

3. The printer of claim 1, wherein, The second movable cover comprises a second cover body and a driving arm connected with each other, the driving arm is rotatably connected with the main body, the first movable cover comprises a first cover body and a pressing arm connected with each other, the pressing arm comprises a pressing arm body used to press the print object and a linkage arm body used to link the driving arm, the linkage arm body is connected with the pressing arm body and rotatably connected with the main body.

4. The printer of claim 1, wherein, The cover assembly further comprises a transmission member rotatably connected with the main body, one end of the transmission member is connected with the linkage arm body, and the other end is used to abut against the driving arm.

5. The printer of claim 1, wherein, The rotation directions of the first movable cover and the second movable cover both comprise an opening direction and a closing direction opposite to each other, the second movable cover is in an open state, and the linkage arm body drives the transmission member to rotate when the first movable cover rotates along the closing direction, the transmission member does not interfere with the driving arm, so that the first movable cover is not linked with the second movable cover during the rotation of the first movable cover from an open state to a closed state, and the driving arm abuts against the transmission member to drive the transmission member to rotate along the opening direction when the second movable cover rotates along the closing direction, and the transmission member drives the pressing arm and the first cover body to rotate along the closing direction to drive the first movable cover to rotate to the closed state.

6. The printer of claim 1, wherein, The transmission member comprises: a connecting part connected with the linkage arm body; and an abutting part connected with the connecting part at an angle, used to abut against the driving arm, and the connection position of the abutting part and the connecting part is rotatably connected with the main body.

7. The printer of claim 6, wherein, ​ ​ ​ 8. The printer of claim 7, wherein, When the first movable cover is in the closed state, a first distance is provided between the end of the connecting portion away from the abutting portion and the driving arm, and the first distance is not less than 1 mm and not more than 10 mm.

9. The printer of claim 7, wherein, The cover assembly further comprises: An elastic member, one end of the elastic member is connected with the end of the connecting portion away from the abutting portion, and the other end of the elastic member is connected with the linkage arm body; When the first movable cover and the second movable cover are both in the closed state, the elastic member stores elastic potential energy; after the second movable cover is opened, the elastic member releases the elastic potential energy to drive the first movable cover to be opened.

10. The printer of claim 9, wherein, The elastic member comprises one of a tension spring and an elastic rubber member.

11. The printer of claim 7, wherein, The driving arm has a first contact surface, the abutting portion has a second contact surface for abutting against the first contact surface, and the contact form of the first contact surface and the second contact surface is linear contact.

12. The printer of claim 11, wherein, The first contact surface is an arc surface, and the second contact surface is a plane. The length of the linear contact is not less than 5 mm and not more than 20 mm.

13. The printer of claim 6, wherein, The main machine further has an avoiding slot for the linkage arm body of the abutting arm to extend into, and the part of the linkage arm body extending into the avoiding slot is arranged to be spaced apart from the slot wall of the avoiding slot.

14. The printer of claim 13, wherein, The part of the linkage arm body extending into the avoiding slot has two side surfaces perpendicular to the rotation axis of the linkage arm body, and a second distance is provided between the side surfaces and the slot wall of the avoiding slot, and the second distance is not less than 1 mm and not more than 4 mm.

15. The printer of claim 6, wherein, When the first movable cover is in the limit position of being opened, the included angle between the linkage arm body and the horizontal plane is not less than 5° and not more than 85°.

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