Printer and double-movable printer core

Abstract

The application provides a double-layer movable printer core, which comprises a main body frame, a head unit and a pressure roller unit, the head unit comprises a thermal head and a movable frame, and the main body frame comprises a supporting part; wherein a first elastic element is arranged between the thermal head and the movable frame, and a second elastic element is arranged between the movable frame and the supporting part. The printer core of the application can apply the force of cooperating with the pressure roller unit to clamp the recording paper to the thermal head by arranging the first elastic element between the thermal head and the movable frame and arranging the second elastic element between the movable frame and the supporting part of the main body frame, and the first elastic element and the second elastic element cooperate to apply the force to the thermal head, when the thermal paper is too thick, the first elastic element first elastically contracts, the thermal head moves away from the pressure roller unit earlier than the movable frame, so that the printer core can better adapt to the thickness change of the thermal paper. The application further provides a printer.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printers, and in particular to a printer and a double-layer movable printer core. BACKGROUND

[0002] A thermal printer is provided in the prior art, which presses a thermal head against thermal paper (recording paper) to perform printing. This kind of printer can perform printing of characters and graphics without using toner or ink, and is widely used in printing of various labels, receipts or tickets. A common thermal printer comprises a main frame, a head unit and a pressure roller unit, the thermal head of the head unit and the pressure roller unit can clamp the thermal paper therebetween, and the pressure roller unit can drive the thermal paper to move. In order to improve the clamping force of the thermal head and the pressure roller unit on the thermal paper, an elastic member is usually arranged on the side of the thermal head away from the pressure roller unit, and the elastic member applies an elastic force to the thermal head, so that the thermal head and the pressure roller unit can clamp the thermal paper. When the elastic force applied by the elastic member to the thermal head is too small, the thermal head and the pressure roller unit cannot clamp the thermal paper, which can easily lead to blurred printing. When the elastic force applied by the elastic member to the thermal head is too large, paper jam can easily occur when the thermal paper is too thick. That is, when the elastic force applied by the elastic member to the thermal head is too large or too small, the printing effect is affected. Therefore, the present application is proposed. SUMMARY

[0003] The technical problem to be solved by the present application is to overcome the shortcomings of the prior art, and to provide a double-layer movable printer core which can solve the problem that the elastic force applied by the elastic member to the thermal head is too small or too large, affecting the printing effect.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a double-layer movable printer core, comprising a main frame, a head unit and a pressure roller unit, the head unit and the pressure roller unit being combined in a separable manner; the head unit comprises a thermal head and a movable frame, and the main frame comprises a supporting portion; wherein a first elastic element is arranged between the thermal head and the movable frame to enable the thermal head to be movable relative to the movable frame, and a second elastic element is arranged between the movable frame and the supporting portion to enable the head unit to be movable relative to the main frame as a whole.

[0005] Preferably, the thermal head is fixed to a head support, and the head support is movably combined to the movable frame.

[0006] Preferably, the head support has a first fulcrum portion which is a swing fulcrum of the head support, and a first guide portion which guides the swing path of the head support; wherein the first fulcrum portion is located on one side of the head support, and the first guide portion is located on the other side of the head support opposite to the first fulcrum portion.

[0007] Preferably, the first guide portion is a hole, and the movable frame is provided with a rod-shaped portion matched with the hole.

[0008] Preferably, the first guide portion is arranged in the left-right direction as two opposite portions.

[0009] Preferably, the rod-shaped portion is a rod extending between the left and right sides of the head support.

[0010] Preferably, the movable frame is provided with a stop portion matched with the first fulcrum portion, and the stop portion is arranged such that the head support swings under the restriction of the first fulcrum portion.

[0011] Preferably, the stop portion is a protruding column extending from the movable frame into the first fulcrum portion.

[0012] Preferably, the movable frame is provided with a second fulcrum portion serving as a swing fulcrum of the movable frame, and a second guide portion guiding the swing path of the movable frame, wherein the second fulcrum portion is located on one side of the movable frame, and the second guide portion is located on the other side of the movable frame opposite to the second fulcrum portion.

[0013] Preferably, the main body frame is provided with a sliding groove matched with the second guide portion, and the second guide portion extends into the sliding groove.

[0014] Preferably, the movable frame is attached with a rod-shaped portion extending between the left and right sides thereof, and the end of the rod-shaped portion is formed as the second guide portion.

[0015] Preferably, the main body frame is provided with a support portion matched with the second fulcrum portion, and the support portion is arranged such that the movable frame swings under the restriction of the second fulcrum portion.

[0016] Preferably, the main body frame comprises a paper guide seat for guiding the travel of recording paper, and the support portion is formed on the paper guide seat.

[0017] Preferably, when the movable frame is assembled to the main body frame, the force exerted by the second elastic element can position the movable frame on the main body frame.

[0018] Preferably, when the head unit is assembled to the main body frame, the force exerted by the second elastic element on the movable frame is greater than the force exerted by the first elastic element on the head unit, so that the thermal head can move away from the platen unit prior to the movable frame when subjected to an external force exceeding a threshold value.

[0019] The application further provides a printer comprising the printer core as described in any one of the preceding aspects.

[0020] By adopting the technical scheme, the printer core has the following technical effects:

[0021] 1. The printer core has the following technical effects:

[0022] 2. The convex column is used as the stop portion and cooperates with the first supporting point portion, the overall structure is simple, and assembly is convenient.

[0023] 3. The supporting portion is formed on the paper guide seat, so that the paper guide seat has the function of guiding the record paper to travel and cooperates with the second supporting point portion, the second supporting point portion becomes the swing supporting point of the movable frame, and the overall structure of the printer core is relatively compact. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings of the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description only relate to some embodiments of the present application and are not a limitation on the present application.

[0025] Figure 1 and Figure 2 respectively show the schematic diagrams of the printer core of an embodiment from different perspectives.

[0026] Figure 3 and Figure 4 respectively show the first exploded view of the printer core of an embodiment from different perspectives.

[0027] Figure 5 show the second exploded view of the printer core of an embodiment.

[0028] Figure 6 show the third exploded view of the printer core of an embodiment.

[0029] Figure 7 and Figure 8 respectively show the first exploded view of the head unit from different perspectives.

[0030] Figure 9 show the schematic diagram of the head unit.

[0031] Figure 10 show the sectional view of the head unit.

[0032] Figure 11An exploded view of the head unit and the main frame is illustrated.

[0033] Figure 12 A cross-sectional view of the head unit and the main frame is illustrated.

[0034] BRIEF DESCRIPTION OF DRAWINGS

[0035] Main frame 1, cradle 1C, paper guide 1B, head unit 2, thermal head 2A, movable frame 2B, head support 2C, first elastic element 2D, second elastic element 2E, roller unit 3, cutter unit 4, fixed blade 4A, movable blade 4B, blade drive assembly 4C, motor 5, transmission gear set 6, first fulcrum portion T11, first guide portion T12, rod-shaped portion T13, stop portion T14, second fulcrum portion T21, second guide portion T22, slide groove T23, support portion T24. DETAILED DESCRIPTION

[0036] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will further describe the present application with reference to the accompanying drawings. The components of the embodiments of the present application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0037] It should be noted that: similar numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0038] Unless otherwise defined, technical terms or scientific terms used in the present patent document shall have the meanings as commonly understood by one of ordinary skill in the art to which this application belongs. The terms "first", "second", and similar terms as used in the specification and claims of the present patent document do not denote any ordinal, quantity or importance, but are used to distinguish different elements. Also, the terms "one", "a" or "the" as used in this specification and claims does not exclude the existence of more than one, unless otherwise specified. The term "including" as used in this specification and claims means the inclusion of the elements or objects listed after the term "including" or "comprising", but not excluding other elements or objects. The terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "far", "near" and the like are used only to indicate relative positions, and when the absolute positions of the described objects are changed, the relative positions can also be changed accordingly. They are only used to facilitate the description of the present application and simplify the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In the description of the present application, it should be noted that unless otherwise specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or separably connected, or integrally connected; it can be mechanically connected, or electrically connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0040] Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The features in the following examples can be combined with each other without conflict.

[0041] In combination Figures 1 to 12 In an embodiment, the double-layer movable printer core of the present application includes a main frame 1, a head unit 2, a pressure roller unit 3, a cutter unit 4, a motor 5, and a transmission gear set 6. The head unit 2 and the pressure roller unit 3 are mounted on the main frame 1 and combined in a separable manner. The cutter unit 4 is mounted on the main frame 1 and used to cut the recording paper (usually thermal paper). The motor 5 is mounted on the main frame 1, and the motor 5 drives the pressure roller 3A of the pressure roller unit 3 to roll through the transmission gear set 6. For the convenience of description, the X direction in the drawing is the left-right direction, and the Y direction is the front-rear direction.

[0042]

Main body frame

[0043]

Head unit

[0044] The cooperation manner of the head support 2C and the movable frame 2B will be described first as follows. Figures 7 to 10, the head holder 2C has a first fulcrum portion T11 and a first guide portion T12, the first fulcrum portion T11 is a swing fulcrum of the head holder 2C, and the first guide portion T12 is used to guide the swing path of the head holder 2C. The first fulcrum portion T11 is located on one side of the head holder 2C, and the first guide portion T12 is located on the other side of the head holder 2C opposite the first fulcrum portion T11. In this embodiment, the first fulcrum portion T11 and the first guide portion T12 are distributed on both sides of the head holder 2C in the front-rear direction Y. In this embodiment, the first guide portion T12 is configured as two opposite holes in the left-right direction X, and the first guide portion T12 is a hole, specifically, the first guide portion T12 is a waist-shaped hole or a long hole. The movable frame 2B is provided with a rod-shaped portion T13 matched with the hole, and the rod-shaped portion T13 is a rod extending between the left and right sides of the head holder 2C (in this embodiment, the first guide portion T12 is a waist-shaped hole, and the rod can slide along the waist-shaped hole). The movable frame 2B has a stop portion T14 matched with the first fulcrum portion T11, and the stop portion T14 is configured to swing the head holder 2C under the limitation of the first fulcrum portion T11, so as to move the thermal head 2A towards or away from the pressure roller 3A. In this embodiment, the stop portion T14 is a protruding column extending from the movable frame 2B to the inside of the first fulcrum portion T11, and the first fulcrum portion T11 is a through hole with a radial dimension slightly larger than that of the protruding column. Figure 10 In this embodiment, the head holder 2C can also rotate around the axis of the stop portion T14 to adjust the parallelism of the head holder 2C and the pressure roller 3A, so that each printing point on the thermal head 2A on the head holder 2C can contact the pressure roller 3A in the left-right direction. It should be understood that the specific embodiments of the first fulcrum portion T11 and the stop portion T14 are not limited to this, and they can also be adjusted to a spherical hinge structure, for example, the first fulcrum portion T11 is a ball head, and the stop portion T14 is a matched ball socket.

[0045] The cooperation mode of the movable frame 2B and the main body frame 1 will be further described below. In combination with Figure 11 and Figure 12The second fulcrum portion T21 is located on one side of the movable frame 2B, and the second guide portion T22 is located on the other side of the movable frame 2B opposite the second fulcrum portion T21. In this embodiment, the second fulcrum portion T21 and the second guide portion T22 are distributed on both sides of the movable frame 2B along the front-rear direction Y. The main frame 1 has a sliding groove T23 that cooperates with the second guide portion T22, and the second guide portion T22 extends into the sliding groove T23. The movable frame 2B is attached with a rod-shaped portion T13 extending between the left and right sides thereof, and the end of the rod-shaped portion T13 is formed as the second guide portion T22. The main frame 1 has a support portion T24 that cooperates with the second fulcrum portion T21, and the support portion T24 is provided in two and is arranged at intervals along the left-right direction X. In this embodiment, the second fulcrum portion T21 is a square hole. In this embodiment, the support portion T24 is formed on the paper guide seat 1B. The support portion T24 is arranged such that the movable frame 2B swings under the limitation of the second fulcrum portion T21, and at the same time, the second fulcrum portion T21 also limits the position of the paper guide seat 1B, thereby limiting the installation of the paper guide seat 1B relative to the main frame body 1A.

[0046] In this embodiment, the rod-shaped portion T13 cooperates with the first guide portion T12 to guide the swing path of the head bracket 2C, and cooperates with the sliding groove T23 to guide the swing path of the movable frame 2B, so that the overall structure of the printer core is relatively compact.

[0047] When the movable frame 2B is assembled to the main frame 1, the force exerted by the second elastic element 2E can position the movable frame 2B on the main frame 1. When the head unit 2 is assembled to the main frame 1, the force exerted by the second elastic element 2E on the movable frame 2B is greater than the force exerted by the first elastic element 2D on the head unit 2, so that when the thermal head 2A is subjected to an external force exceeding a threshold value, it can move away from the pressure roller unit 3 before the movable frame 2B.

[0048]

Pressure roller unit

[0049]

Cutter unit

[0050] The above is a printer core of an embodiment of the application, and the application further provides a printer having the printer core.

[0051] The above merely provides a specific implementation of the application, but the protection scope of the application is not limited thereto, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, which should be covered by the protection scope of the application. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A double-layer movable printer core, comprising a main frame (1), a head unit (2) and a pressure roller unit (3), the head unit (2) and the pressure roller unit (3) being combined in a separable manner; characterized in that: the head unit (2) comprises a thermal head (2A) and a movable frame (2B), and the main frame comprises a supporting part (1C) ; wherein a first elastic element (2D) is arranged between the thermal head (2A) and the movable frame (2B) to enable the thermal head (2A) to be movable relative to the movable frame (2B), and a second elastic element (2E) is arranged between the movable frame (2B) and the supporting part (1C) to enable the head unit (2) to be movable integrally relative to the main frame (1) ; when the head unit (2) is assembled to the main frame (1), the second elastic element (2E) exerts a force on the movable frame (2B) that is greater than a force exerted by the first elastic element (2D) on the head unit (2), so that the thermal head (2A) can generate a movement away from the pressure roller unit (3) prior to the movable frame (2B) when subjected to an external force exceeding a threshold value, thereby enabling the printer core to better adapt to changes in the thickness of thermal paper; the first elastic element (2D) or the second elastic element (2E) is a compression spring. The thermal head (2A) is fixed to a head support (2C), and the head support (2C) is movably combined to the movable frame (2B). The head support (2C) has: a first fulcrum part (T11) that is a swing fulcrum of the head support (2C) ; and a first guide part (T12) that guides a swing path of the head support (2C) ; wherein the first fulcrum part (T11) is located on one side of the head support (2C), and the first guide part (T12) is located on the other side of the head support (2C) opposite to the first fulcrum part (T11). The first guide part (T12) is a hole, and a rod-shaped part (T13) is provided on the movable frame (2B) to cooperate with the hole. The first guide part (T12) is configured as two opposite parts in the left-right direction. The rod-shaped part (T13) is a rod extending between the left and right sides of the head support (2C). The movable frame (2B) has a stop part (T14) cooperating with the first fulcrum part (T11), and the stop part (T14) is configured to enable the head support (2C) to swing under the limitation of the first fulcrum part (T11). The stop part (T14) is a protruding column extending from the movable frame (2B) into the first fulcrum part (T11). The movable frame (2B) has: a second fulcrum part (T21) that is a swing fulcrum of the movable frame (2B) ; and a second guide part (T22) that guides a swing path of the movable frame (2B) ; wherein the second fulcrum part (T21) is located on one side of the movable frame (2B), and the second guide part (T22) is located on the other side of the movable frame (2B) opposite to the second fulcrum part (T21). ​ ​ ​ ​ 2. The printer core of claim 1, wherein, ​ 3. The printer core of claim 2, wherein, ​ ​ ​ ​ 4. The printer core of claim 3, wherein, ​ 5. The printer core of claim 4, wherein, ​ 6. A printer core according to claim 4 or 5, wherein, ​ 7. The printer core of claim 3, wherein, ​ 8. The printer core of claim 7, wherein, ​ 9. The printer core of claim 1, wherein, ​ ​ ​ ​ 10. The printer core of claim 9, wherein, The main body frame (1) has a slide groove (T23) cooperating with the second guide portion (T22), and the second guide portion (T22) extends into the slide groove (T23).

11. The printer core of claim 10, wherein, The movable frame (2B) is attached with a rod-shaped portion (T13) extending between left and right sides thereof, and the end of the rod-shaped portion (T13) is formed as the second guide portion (T22).

12. The printhead core of claim 9 or 10 or 11, wherein, The main body frame (1) has a support portion (T24) cooperating with the second fulcrum portion (T21), and the support portion (T24) is configured to enable the movable frame (2B) to swing under the limitation of the second fulcrum portion (T21).

13. The printer core of claim 12, wherein, The main body frame (1) includes a paper guide seat (1B) for guiding the travel of recording paper, and the support portion (T24) is formed on the paper guide seat (1B).

14. The printer core of claim 1 or 13, wherein, When the movable frame (2B) is assembled to the main body frame (1), the force exerted by the second elastic element (2E) can enable the movable frame (2B) to be positioned on the main body frame (1).

15. A printer having the printer core according to any one of claims 1-14.

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