Printer

Abstract

The printer comprises a machine body, a pressure roller is arranged in the machine body, the pressure roller is provided with a main body and a shaft sleeve, and the shaft sleeve is arranged at at least one end of the main body and provided with a first limiting part; the machine body comprises a base, the base is provided with a lower frame and a baffle, one side of the first limiting part abuts against the lower frame, and the other side of the first limiting part abuts against the baffle to limit movement of the shaft sleeve relative to the base. According to the printer, the lower frame abuts against the first limiting part to limit the shaft sleeve to move or rotate towards the interior of the printer, the baffle abuts against the first limiting part to limit the shaft sleeve to move or rotate towards the exterior of the printer, and therefore positioning of the shaft sleeve is achieved. When the pressure roller needs to be detached, the baffle is detached from the lower frame firstly, at the moment, limiting of the baffle to the first limiting part is relieved, the first limiting part is pulled to drive the shaft sleeve to rotate to a proper angle, then the pressure roller can be detached from the base, the structure of the shaft sleeve cannot be damaged, the shaft sleeve cannot deform, and the shaft sleeve can be repeatedly used.

Description

Technical Field

[0001] This application relates to the field of printing technology, and particularly to a printer. Background Art

[0002] There is a pressure roller inside the printer. At least one side of the pressure roller is provided with a bushing. There are bumps on the cantilever of the bushing, and the bumps can be engaged with the grooves on the printer body to achieve positioning. When disassembling the pressure roller, it is necessary to bend the cantilever to deform so that the bumps disengage from the grooves. However, the cantilever cannot be restored after deformation, resulting in the bushing being unable to be reused. Utility Model Content

[0003] This application provides a printer, which is used to solve the problem of damage to the bushing when disassembling the pressure roller.

[0004] A printer provided by an embodiment of this application, the printer includes: a body, a pressure roller is arranged inside the body, the pressure roller has a main body and a bushing, the bushing is arranged at at least one end of the main body, and the bushing has a first limiting portion; the body includes a base, the base has a lower frame and a baffle, one side of the first limiting portion abuts against the lower frame, and the other side abuts against the baffle to limit the movement of the bushing relative to the base.

[0005] In a possible design, the bushing has a first limiting portion, and at least part of the projections of the first limiting portion and the main body on a plane perpendicular to the axis of the main body do not coincide.

[0006] In a possible design, a first convex portion is arranged on the lower frame, a second convex portion is arranged on the baffle, and when the baffle is connected to the lower frame, both sides of the first limiting portion abut against the first convex portion and the second convex portion respectively.

[0007] In a possible design, the first convex portion has a first abutting surface facing the second convex portion, the second convex portion has a second abutting surface facing the first convex portion, both the first abutting surface and the second abutting surface abut against the first limiting portion, and the first abutting surface is parallel to the second abutting surface.

[0008] In a possible design, the lower frame has a mounting plate, the first convex portion is arranged on the mounting plate, and the first limiting portion abuts against the mounting plate along the width direction of the body.

[0009] In a possible design, a mounting groove is further arranged on the mounting plate, the bushing has a connecting portion, and the connecting portion is rotatably connected to the mounting groove.

[0010] In a possible design, the bushing has a second limiting portion that protrudes from the connecting portion along the circumferential direction of the connecting portion; when the connecting portion is rotatably connected to the mounting groove, the second limiting portion abuts against the mounting plate.

[0011] In a possible design, one side of the connecting portion facing away from the first limiting portion has an avoidance plane, and when the first limiting portion extends along the height direction of the machine body, the avoidance plane is perpendicular to the height direction of the machine body.

[0012] In a possible design, the baffle has a sliding shaft, and the sliding shaft is arranged on the second convex portion; a sliding groove is arranged on the mounting plate, and the sliding shaft is connected to the sliding groove.

[0013] In a possible design, when the bushings are arranged on both sides of the main body, the structures of the two bushings are the same.

[0014] In this application, the lower frame abuts against the first limiting portion of the bushing to limit the movement or rotation of the bushing in the direction towards the inside of the printer, and the baffle abuts against the first limiting portion of the bushing to limit the movement or rotation of the bushing in the direction towards the outside of the printer, so as to realize the positioning of the bushing. When the pressure roller needs to be disassembled, first remove the baffle from the lower frame. At this time, the limiting effect of the baffle on the first limiting portion is released. By pulling the first limiting portion to drive the bushing to rotate to an appropriate angle, the pressure roller can be removed from the base, without damaging the structure of the bushing and without deformation of the bushing, so that the bushing can be reused.

[0015] It should be understood that the above general description and the following detailed description are only exemplary and do not limit this application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic structural diagram of the printer provided by this application in a specific embodiment, in which the machine body of the printer is in a closed state;

[0017] Figure 2 is Figure 1 a schematic structural diagram of the machine body of the printer in the opened state in;

[0018] Figure 3 is Figure 2 a schematic structural diagram of the pressure roller in;

[0019] Figure 4 is Figure 2 a partial schematic structural diagram of the first limiting portion of the pressure roller abutting against the first convex portion and the second convex portion in;

[0020] Figure 5 is Figure 2 a schematic structural diagram of the lower frame in;

[0021] Figure 6 is Figure 2 a schematic structural view of the middle baffle;

[0022] Figure 7 is Figure 3 a schematic structural view of the middle bushing;

[0023] Figure 8 is Figure 2 a partial structural view of the first limiting portion of the middle pressure roller abutting against the first convex portion;

[0024] Figure 9 is Figure 2 a schematic structural view of the middle pressure roller in another embodiment.

[0025] Reference numerals:

[0026] 1 - body;

[0027] 11 - cover;

[0028] 12 - base;

[0029] 121 - lower frame;

[0030] 121a - mounting plate;

[0031] 121b - first convex portion;

[0032] 121c - mounting groove;

[0033] 121d - sliding groove;

[0034] 121e - avoidance groove;

[0035] 122 - bottom shell;

[0036] 123 - baffle;

[0037] 123a - second convex portion;

[0038] 123b - sliding shaft;

[0039] 123c - extension portion;

[0040] 123d - body;

[0041] 13 - ribbon holder;

[0042] 14 - media outlet;

[0043] 2 - media roll;

[0044] 3 - pressure roller;

[0045] 31 - main body;

[0046] 32 - bushing;

[0047] 321 - The first limiting part;

[0048] 322 - The second limiting part;

[0049] 323 - The connecting part;

[0050] 4 - The print head.

[0051] The accompanying drawings here are incorporated into the description and form a part of this description, showing embodiments consistent with this application, and are used together with the description to explain the principles of this application. Detailed implementation manners

[0052] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0053] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope of protection of this application.

[0054] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms "a", "the", and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0055] It should be understood that the term " / and" used herein is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0056] It should be noted that the orientation terms such as "upper", "lower", "left", and "right" described in the embodiments of this application are described from the angles shown in the accompanying drawings, and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0057] This application provides a printer, such as Figure 1 and Figure 2As shown in the figure, the printer includes: a body 1, the body 1 includes a cover 11, a base 12 and a ribbon cassette 13, the cover 11 is rotatably connected to the base 12, and the ribbon cassette 13 is disposed between the two. The body 1 has an open state and a closed state. When the body 1 is in the closed state, the cover 11 covers the base 12, and the ribbon cassette 13 is enclosed between the cover 11 and the base 12; when the body 1 is in the open state, the cover 11 rotates and opens relative to the base 12 to expose the ribbon cassette 13 to the user.

[0058] As Figure 2 shown in the figure, the ribbon cassette 13 has a frame body and a supply shaft, a take-up shaft and a print head 4 disposed on the frame body. A ribbon roll is installed on the supply shaft, and the ribbon is supplied from the supply shaft to the print head 4 and then recovered from the print head 4 to the take-up shaft. A pressure roller 3 is disposed on the base 12. When the body 1 is in the closed state, the pressure roller 3 contacts the print head 4. A media roll 2 is installed between the ribbon cassette 13 and the base 12. The media and the ribbon are supplied to the print head 4 together. The pressure roller 3 presses the media and the ribbon against the print head 4, and the ink on the ribbon is transferred to the media. Therefore, the contact position between the pressure roller 3 and the print head 4 is the printing position. There is also a media outlet 14 between the cover 11 and the base 12. The printed media can be discharged from the media outlet 14 under the rotation of the pressure roller 3. In addition, the ribbon cassette 13 also has a connecting rod. The ribbon cassette 13 is rotatably connected to the cover 11 through the connecting rod. Thus, when the cover 11 rotates and opens relative to the base 12, the ribbon cassette 13 can also rotate and lift relative to the base 12 to expose the media roll 2, facilitating the installation, replacement and adjustment of the media roll 2 by the user.

[0059] As Figure 2 shown in the figure, the base 12 includes a lower frame 121, a bottom case 122 and a baffle 123. The lower frame 121 is installed on the bottom case 122, and the baffle 123 is detachably connected to the lower frame 121 and the bottom case 122.

[0060] As Figures 2 to 4 shown in the figure, a pressure roller 3 is disposed inside the body 1. The pressure roller 3 has a main body 31 and a bushing 32. The bushing 32 is disposed at at least one end of the main body 31. The bushing 32 has a first limiting portion 321; one side of the first limiting portion 321 abuts against the lower frame 121, and the other side abuts against the baffle 123 to limit the movement of the bushing 32 relative to the base 12.

[0061] In this embodiment, as Figure 4As shown in the figure, the lower frame 121 abuts against the first limiting portion 321 of the bushing 32 to limit the movement or rotation of the bushing 32 in the direction towards the inside of the printer, and the baffle 123 abuts against the first limiting portion 321 of the bushing 32 to limit the movement or rotation of the bushing 32 in the direction towards the outside of the printer, thereby realizing the positioning of the bushing 32. When the pressure roller 3 needs to be disassembled, first remove the baffle 123 from the lower frame 121. At this time, the limit of the first limiting portion 321 by the baffle 123 is released. By pulling the first limiting portion 321 to drive the bushing 32 to rotate to an appropriate angle, the pressure roller 3 can be removed from the base 12 without damaging the structure of the bushing 32, and the bushing 32 will not be deformed, so that the bushing 32 can be reused.

[0062] In a specific embodiment, as Figure 3 and Figure 4 shown, the projections of the first limiting portion 321 and the main body 31 on a plane along the direction perpendicular to the axis of the main body 31 do not coincide at least partially, that is, when observed along the axis of the main body 31, at least part of the first limiting portion 321 protrudes from the main body 31, so as to facilitate the limiting of the first limiting portion 321, and at the same time, limiting the first limiting portion 321 will not affect the rotation of the main body 31.

[0063] Specifically, as Figures 4 to 6 shown, the lower frame 121 is provided with a first convex portion 121b, and the baffle 123 is provided with a second convex portion 123a. When the baffle 123 is connected to the lower frame 121, both sides of the first limiting portion 321 abut against the first convex portion 121b and the second convex portion 123a respectively, thereby restricting the movement of the first limiting portion 321, and further restricting the movement of the bushing 32 relative to the base 12.

[0064] Among them, the first convex portion 121b may be a convex block structure on the lower frame 121, and the second convex portion 123a may be a protruding plate-like structure on the baffle 123.

[0065] More specifically, the first convex portion 121b has a first abutting surface facing the second convex portion 123a, and the second convex portion 123a has a second abutting surface facing the first convex portion 121b. Both the first abutting surface and the second abutting surface abut against the first limiting portion 321, and the first abutting surface and the second abutting surface are parallel, so that the force exerted by the first abutting surface on the first limiting portion 321 and the force exerted by the second abutting surface on the first limiting portion 321 are in opposite directions, and the limiting effect on the first limiting portion 321 is better.

[0066] Among them, the surface of the first limiting portion 321 facing the first abutting surface can be fitted with the first abutting surface, and the surface of the first limiting portion 321 facing the second abutting surface can be fitted with the second abutting surface, so that both the first abutting surface and the second abutting surface can provide a reliable limiting force to the first limiting portion.

[0067] It is understandable that the first abutting surface and the second abutting surface may not be parallel, as long as both can limit the first limiting portion 321. The first abutting surface and the second abutting surface may also be inclined surfaces.

[0068] Preferably, the first limiting portion 321 extends in a direction perpendicular to the axis of the main body 31 , so as to facilitate production and processing of the sleeve 32 .

[0069] Further, such as Figure 5 As shown, the lower frame 121 has a mounting plate 121a, the first protrusion 121b is arranged on the mounting plate 121a, and the first limiting portion 321 abuts against the mounting plate 121a along the width direction of the body 1, so that the mounting plate 121a can limit the movement of the first limiting portion 321 along the width direction of the body 1, so that the sleeve 32 is more stably installed on the base 12.

[0070] In some specific embodiments, Figure 5 , Figure 7 and Figure 8 As shown, the mounting plate 121a is further provided with a mounting groove 121c, and the shaft sleeve 32 has a connecting portion 323, and the connecting portion 323 is rotatably connected to the mounting groove 121c. The first protrusion 121b can be provided obliquely below the mounting groove 121c.

[0071] Specifically, the pressure roller 3 further includes a driving gear 33 , which is connected to the main body 31 . When the driving gear 33 receives a driving force, the driving gear 33 rotates and drives the main body 31 to rotate relative to the base 12 .

[0072] More specifically, a shaft portion with a smaller diameter is disposed at the end of the main body 31 , and the shaft sleeve 32 and the driving gear 33 are sequentially connected to the shaft portion of the main body 31 , and the driving gear 33 is located outside the shaft sleeve 32 .

[0073] Furthermore, two mounting plates 121a are provided on the lower frame 121, and the two mounting plates 121a are arranged opposite to each other. A mounting groove 121c is provided on each mounting plate 121a, and at least one shaft portion of the main body 31 is rotatably connected to the mounting groove 121c through a shaft sleeve 32, that is, most of the main body 31 is located between the two mounting plates 121a, and a small portion passes through the mounting groove 121c and is connected to the driving gear 33, and the driving gear 33 is located on the side of one of the mounting plates 121a away from the other mounting plate 121a.

[0074] Furthermore, Figure 7 and Figure 8As shown, the shaft sleeve 32 has a second limiting portion 322, and the second limiting portion 322 protrudes from the connecting portion 323 along the circumferential direction of the connecting portion 323; when the connecting portion 323 is rotatably connected to the mounting groove 121c, the second limiting portion 322 abuts against the mounting plate 121a, so that the limiting effect of the mounting plate 121a on the shaft sleeve 32 is more reliable, ensuring the installation stability of the shaft sleeve 32 relative to the base 12. At the same time, when the shaft sleeve 32 rotates relative to the base 12, the abutment of the second limiting portion 322 and the mounting plate 121a enables the shaft sleeve 32 to rotate more smoothly.

[0075] Preferably, Figure 7 As shown, the side of the connecting portion 323 away from the first limiting portion 321 has an avoidance plane 324. When the first limiting portion 321 extends along the height direction of the body 1, the avoidance plane 324 is perpendicular to the height direction of the body 1, so that when the cover body 11 covers the base 12, the sleeve 32 will not interfere with the cover body 11 and the ribbon frame 13.

[0076] In a specific embodiment, Figure 6 and Figure 8 As shown, the baffle 123 has a sliding shaft 123b, and the sliding shaft 123b is arranged on the second protrusion 123a; a sliding groove 121d is arranged on the mounting plate 121a, and the sliding groove 121d extends downward at an angle along the height direction of the body 1, so that the sliding shaft 123b can slide along the sliding groove 121d under the action of gravity, and gradually approach the installation position during the sliding process until it is installed in place, so the sliding groove 121d can provide guidance for the sliding shaft 123b, reducing the difficulty of installing the baffle 123.

[0077] Specifically, the baffle 123 has a body 123d, and the second protrusion 123a extends in a direction perpendicular to the body 123d, so that there is a certain distance between the sliding shaft 123b and the body 123d to prevent the baffle 123 from interfering with the lower frame 121 and the bottom shell 122.

[0078] Further, such as Figure 5 and Figure 6 As shown, the baffle 123 is also provided with an extension portion 123c, and the lower frame 121 is provided with an avoidance groove 121e. The extension portion 123c can pass through the avoidance groove 121e to connect with the bottom shell 122, thereby improving the tightness of the fit among the lower frame 121, the bottom shell 122 and the baffle 123, making the structure of the base 12 more reliable.

[0079] For the above embodiments, Figure 9 As shown, the shaft sleeves 32 can also be arranged on both sides of the main body 31 to improve the stability of the pressure roller 3 relative to the base 12. The two shaft sleeves 32 have the same structure, so they can be produced by the same set of molds, reducing the production cost of the shaft sleeves 32.

[0080] The above are only the preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A printer, characterized in that: The printer comprises: a machine body (1), a pressure roller (3) is arranged inside the machine body (1), the pressure roller (3) comprises a main body (31) and a shaft sleeve (32), the shaft sleeve (32) is arranged at at least one end of the main body (31), and the shaft sleeve (32) has a first limiting portion (321); The machine body (1) comprises a base (12), the base (12) having a lower frame (121) and a baffle (123), one side of the first limiting portion (321) abuts against the lower frame (121), and the other side abuts against the baffle (123) to limit the movement of the shaft sleeve (32) relative to the base (12).

2. The printer according to claim 1, characterized in that: The shaft sleeve (32) has a first limiting portion (321), and the projections of the first limiting portion (321) and the main body (31) on a plane perpendicular to the axial direction of the main body (31) at least partially do not overlap.

3. The printer according to claim 1, characterized in that: The lower frame (121) is provided with a first convex portion (121b), and the baffle (123) is provided with a second convex portion (123a); when the baffle (123) is connected to the lower frame (121), two sides of the first limiting portion (321) are respectively in contact with the first convex portion (121b) and the second convex portion (123a).

4. The printer according to claim 3, characterized in that: The first convex portion (121b) has a first abutting surface facing the second convex portion (123a), and the second convex portion (123a) has a second abutting surface facing the first convex portion (121b), and the first abutting surface and the second abutting surface both abut against the first limiting portion (321), and the first abutting surface and the second abutting surface are parallel.

5. The printer according to claim 3, characterized in that: The lower frame (121) has a mounting plate (121a), the first protrusion (121b) is arranged on the mounting plate (121a), and the first limiting portion (321) abuts against the mounting plate (121a) along the width direction of the machine body (1).

6. The printer according to claim 5, characterized in that: The mounting plate (121a) is also provided with a mounting groove (121c), and the shaft sleeve (32) has a connecting portion (323), and the connecting portion (323) is rotatably connected to the mounting groove (121c).

7. The printer according to claim 6, characterized in that: The shaft sleeve (32) has a second limiting portion (322), and the second limiting portion (322) protrudes from the connecting portion (323) along the circumferential direction of the connecting portion (323); When the connecting portion (323) is rotationally connected to the mounting groove (121c), the second limiting portion (322) abuts against the mounting plate (121a).

8. The printer according to claim 6, characterized in that: The connecting portion (323) has an avoidance plane (324) on a side facing away from the first limiting portion (321); when the first limiting portion (321) extends along the height direction of the machine body (1), the avoidance plane (324) is perpendicular to the height direction of the machine body (1).

9. The printer according to claim 5, characterized in that: The baffle (123) has a sliding shaft (123b), and the sliding shaft (123b) is arranged on the second protrusion (123a); The mounting plate (121a) is provided with a slide groove (121d), and the sliding shaft (123b) is connected to the slide groove (121d).

10. The printer according to any one of claims 1 to 9, characterized in that: When the shaft sleeves (32) are arranged on both sides of the main body (31), the two shaft sleeves (32) have the same structure.

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