Paper feeding buffer device for positive and negative paper rolls

Abstract

The utility model discloses a positive and negative paper roll feeding buffer device which is installed between a printing mechanism and a paper roll support and comprises two buffer shaft supports, two buffer rods and four tension springs. The two buffering shaft supports are arranged in a spaced mode and provided with rail grooves. The two buffer rods are transversely arranged and distributed at intervals, the two ends of each buffer rod are slidably arranged in the two corresponding track grooves respectively, and the ends of the buffer rods penetrate out of the track grooves; one ends of the tension springs are fixed to the buffer shaft support, the other ends of the tension springs are connected with the ends of the buffer rods, the two tension springs provide downward tension for the buffer rod close to the lower end of the track groove, and the other two tension springs provide upward tension for the buffer rod close to the upper end of the track groove. The compression phenomenon of the printed content can be avoided, and the paper roll can be suitable for paper rolls which are arranged in a forward and reverse mode.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a paper feeding buffer device for front and back paper rolls. Background Art

[0002] The printing paper of the ticket or label printer is installed on the printer in the form of a paper roll. When working, the motor drives the paper roll to rotate, and one end of the printing paper continues to move forward into the printing port. When using a large-capacity paper roll, the weight of the paper roll will increase a lot, the diameter will also increase, the angle of paper entry will also become larger, the transmission resistance during printing is large, resulting in compression of the printed content.

[0003] In the prior art, a paper feed buffer structure is used to reduce the paper feed angle and transmission resistance. However, there are two types of paper roll installation: positive installation and reverse installation. The existing paper feed buffer structure can only be used with one of the paper roll installation types. Utility Model Content

[0004] To this end, the utility model provides a buffer device for feeding front and back paper rolls to solve one or more of the above problems.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A forward and reverse paper roll feeding buffer device is installed between a printing mechanism and a paper roll holder, comprising two buffer shaft holders, two buffer rods and four tension springs; the two buffer shaft holders are arranged at intervals, and the buffer shaft holders are provided with track grooves; the two buffer rods are arranged transversely and distributed at intervals, and the two ends of the buffer rods are respectively slidably arranged in the two track grooves and the ends of the buffer rods pass through the track grooves; one end of the tension spring is fixed to the buffer shaft holder, and the other end is connected to the end of the buffer rod, wherein the two tension springs provide downward pulling force to the buffer rod close to the lower end of the track groove, and the other two tension springs provide upward pulling force to the buffer rod close to the upper end of the track groove.

[0007] Furthermore, two hanging ears are provided on the side of the buffer shaft bracket, one of the hanging ears is located above the track groove and is spaced apart from the track groove, and the other hanging ear is located above the track groove and is spaced apart from the track groove; one end of the tension spring is hooked on the hanging ear, and the other end is hooked on the end of the buffer rod.

[0008] Furthermore, the hanging ear is provided with a notch, and one end of the tension spring is hooked on the notch; the end of the buffer rod is provided with a groove, and a retaining spring is provided in the groove, and the other end of the tension spring is hooked on the buffer rod between the retaining spring and the buffer shaft bracket.

[0009] Furthermore, the hanging ear and the buffer shaft bracket are stamped integrally.

[0010] Furthermore, the front and back paper roll feeding buffer device also includes a base plate and a support shaft, the bottom of the buffer shaft bracket is connected to the side of the base plate, the two buffer shaft brackets are respectively located on both sides of the base plate, and the two ends of the support shaft are respectively connected to the two buffer shaft brackets.

[0011] Furthermore, the printing mechanism and the paper roll holder are installed on the bottom plate at intervals, the buffer shaft holder is located between the printing mechanism and the paper roll holder, and the paper inlet of the printing mechanism faces the paper roll holder.

[0012] The utility model has the following advantages:

[0013] When in use, one end of the positive roll paper passes over the upper buffer shaft and enters the printing mechanism, and one end of the reverse roll paper passes over the lower buffer shaft and enters the printing mechanism. During the movement of the paper, the buffer rod is moved in the track groove by the force of the paper, so that the pulling force when the paper enters the printing mechanism is reduced, avoiding compression of the printed content. It is also suitable for both positive and negative paper rolls.

[0014] The above summary is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the present application will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the implementation or the prior art description. Obviously, the drawings in the following description are only exemplary, and for ordinary technicians in this field, other implementation drawings can be derived from the provided drawings without creative work.

[0016] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment in size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0017] Figure 1 A schematic diagram of the structure of a buffer device for feeding front and back paper rolls provided in an embodiment of the utility model;

[0018] Figure 2 A schematic diagram of the side structure of a positive and negative paper roll feeding buffer device provided by an embodiment of the utility model, in which a positive paper roll is installed on a paper roll support;

[0019] Figure 3 A schematic diagram of the side structure of a paper feed buffer device for front and back paper rolls provided by an embodiment of the utility model, in which a reverse paper roll is mounted on a paper roll support;

[0020] Figure 4 A schematic structural diagram of a buffer shaft support of a front and back paper roll feeding buffer device provided by an embodiment of the utility model;

[0021] Figure 5 A schematic diagram of the partial structure of a buffer shaft support, a buffer rod and a tension spring of a buffer device for feeding a front and back paper roll provided by an embodiment of the utility model;

[0022] Figure 6 A schematic structural diagram of a first buffer rod of a buffer device for feeding front and back paper rolls provided in an embodiment of the utility model;

[0023] Figure 7 A schematic structural diagram of a second buffer rod of a buffer device for feeding front and back paper rolls provided in an embodiment of the utility model.

[0024] In the figure: 1-printing mechanism, 2-paper roll holder, 3-first buffer rod, 4-second buffer rod, 5-paper inlet, 6-paper outlet, 7-large paper roll, 8-buffer shaft holder, 9-mounting circular hole, 10-support shaft, 11-track groove, 12-hanging ear, 13-notch, 14-groove, 15-circlip, 16-tension spring, 17-positive paper roll, 18-negative paper roll. DETAILED DESCRIPTION

[0025] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present application. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0026] like Figure 1-7 As shown, this embodiment provides a front and back paper roll feeding buffer device, which is installed between the printing mechanism 1 and the paper roll support 2 and includes two buffer shaft supports 8, two buffer rods and four tension springs 16.

[0027] The directions of front, back, left, and right in this document are defined with the direction from the paper roll holder 2 to the printing mechanism 1 as the front.

[0028] The buffer shaft bracket 8 is arranged vertically, and the two buffer shaft brackets 8 are arranged at intervals along the left-right direction. The buffer shaft bracket 8 is provided with a vertical track groove 11. The two buffer rods are arranged horizontally (meaning along the left-right direction), and are spaced one above and one below; the two ends of the buffer rod are respectively slidably arranged in the two track grooves 11, and the ends of the buffer rods pass through the track grooves 11; the upper buffer rod is called the first buffer rod 3, and the lower buffer rod is called the second buffer rod 4. One end of the tension spring 16 is fixed to the buffer shaft bracket 8, and the other end is connected to the end of the buffer rod; the two tension springs 16 provide a downward pulling force to the buffer rod close to the lower end of the track groove 11, that is, the two tension springs 16 located at the bottom provide a downward pulling force for the second buffer rod 4; the other two tension springs 16 provide an upward pulling force to the buffer rod close to the upper end of the track groove 11, that is, the two tension springs 16 located at the top provide an upward pulling force for the first buffer rod 3.

[0029] The large paper roll 7 is installed on the paper roll support 2. The installation of the large paper roll 7 is divided into positive installation and reverse installation, which are respectively called positive paper roll 17 and reverse paper roll 18. One end of the positive paper roll 17 is pulled out from the upper position and moved to the printing mechanism 1, and one end of the reverse paper roll 18 is pulled out from the lower position and moved to the printing mechanism 1. By setting the positive and negative paper roll feeding buffer device, one end of the positive paper roll 17 enters the printing mechanism 1 after bypassing the first buffer shaft, and one end of the reverse paper roll 18 enters the printing mechanism 1 after bypassing the second buffer shaft. During the movement of the paper, the buffer rod is moved in the track groove 11 by the force of the paper, so that the pulling force when the paper enters the printing mechanism 1 is reduced, and the compression phenomenon of the printed content is avoided. In addition, the positive and negative paper roll feeding buffer device of this embodiment can be applied to both positive and negative paper rolls.

[0030] In this embodiment, for a single buffer shaft bracket 8, two hanging ears 12 are arranged on the side of the buffer shaft bracket 8, one hanging ear 12 is located above the track groove 11 and is spaced apart from the track groove 11, and the other hanging ear 12 is located above the track groove 11 and is spaced apart from the track groove 11; one end of the tension spring 16 is hooked on the hanging ear 12, and the other end is hooked on the end of the buffer rod. In this way, it is convenient to install the tension spring 16 so that the first buffer rod 3 can be elastically moved upward and the second buffer rod 4 can be elastically moved downward. When the paper bypasses the buffer rod, it will cause the buffer rod to move toward the other buffer rod. At this time, the buffer rod that moves a certain distance causes the tension spring 16 hooked thereon to be stretched.

[0031] It should be pointed out that for the buffer shaft bracket 8 on the left, the two ears 12 are located on the left side of the buffer shaft bracket 8; for the buffer shaft bracket 8 on the right, the two ears 12 are located on the right side of the buffer shaft bracket 8; this prevents the tension spring 16 from affecting paper feeding or scratching the edge of the paper.

[0032] In this embodiment, the hanging ear 12 is provided with a notch 13, and one end of the tension spring 16 is hooked at the notch 13; the end of the buffer rod is provided with a groove 14, and a clamping spring 15 is provided in the groove 14, and the other end of the tension spring 16 is hooked on the buffer rod between the clamping spring 15 and the buffer shaft bracket 8. In this way, the tension spring 16 can be effectively prevented from being decoupled from the hanging ear 12 or the buffer shaft. Among them, the clamping spring 15 is a semicircular ring, made of spring steel, easy to install, and firmly fixed after being clamped in the groove 14.

[0033] In this embodiment, the hanging ear 12 is integrally stamped with the buffer shaft bracket 8 . For example, a bending piece is punched out of the buffer shaft bracket 8 by stamping, and the bending piece is the hanging ear 12 .

[0034] In this embodiment, the front and back paper roll feed buffer device also includes a bottom plate and a support shaft 10. The bottom of the buffer shaft bracket 8 is provided with three mounting circular holes 9 for inserting bolts, and the left and right sides of the bottom plate are respectively provided with two threaded holes, and the bottom of the buffer shaft bracket 8 is connected to the side of the bottom plate by bolts. The two buffer shaft brackets 8 are respectively located on the left and right sides of the bottom plate. A threaded hole is respectively provided at both ends of the support shaft 10, and the support shaft 10 is connected to the two buffer shaft brackets 8 by bolts. By providing the support shaft 10, the firmness of the two buffer shaft brackets 8 can be effectively strengthened.

[0035] In this embodiment, the printing mechanism 1 and the paper roll holder 2 are arranged at intervals, the printing mechanism 1 is installed at the upper front end of the base plate, the paper roll holder 2 is installed at the upper rear end of the base plate, the buffer shaft holder 8 is located between the printing mechanism 1 and the paper roll holder 2, the paper outlet 6 of the printing mechanism 1 faces forward, and the paper inlet 5 of the printing mechanism 1 faces backward.

[0036] In the description of this specification, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0039] In the present application, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0040] The disclosure above provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described above. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numerals and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0041] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A paper feeding buffer device for front and back paper rolls, characterized in that: It is installed between the printing mechanism and the paper roll holder, and includes two buffer shaft holders, two buffer rods and four tension springs; the two buffer shaft holders are arranged at intervals, and the buffer shaft holders are provided with track grooves; the two buffer rods are arranged transversely and distributed at intervals, and the two ends of the buffer rods are respectively slidably arranged in the two track grooves and the ends of the buffer rods pass through the track grooves; one end of the tension spring is fixed to the buffer shaft holder, and the other end is connected to the end of the buffer rod, wherein the two tension springs provide downward pulling force to the buffer rod close to the lower end of the track groove, and the other two tension springs provide upward pulling force to the buffer rod close to the upper end of the track groove.

2. The front and back paper roll feeding buffer device according to claim 1, characterized in that: Two hanging ears are arranged on the side of the buffer shaft bracket, one of the hanging ears is located above the track groove and is spaced apart from the track groove, and the other hanging ear is located above the track groove and is spaced apart from the track groove; one end of the tension spring is hooked on the hanging ear, and the other end is hooked on the end of the buffer rod.

3. The front and back paper roll feeding buffer device according to claim 2, characterized in that: The hanging ear is provided with a notch, and one end of the tension spring is hooked on the notch; the end of the buffer rod is provided with a groove, and a retaining spring is provided in the groove, and the other end of the tension spring is hooked on the buffer rod between the retaining spring and the buffer shaft bracket.

4. The front and back paper roll feeding buffer device according to claim 2, characterized in that: The hanging ear and the buffer shaft bracket are integrally stamped.

5. The front and back paper roll feeding buffer device according to claim 1, characterized in that: The front and back paper roll feeding buffer device also includes a base plate and a support shaft. The bottom of the buffer shaft bracket is connected to the side of the base plate. The two buffer shaft brackets are respectively located on both sides of the base plate. The two ends of the support shaft are respectively connected to the two buffer shaft brackets.

6. The front and back paper roll feeding buffer device according to claim 5, characterized in that: The printing mechanism and the paper roll holder are installed on the bottom plate at intervals, the buffer shaft holder is located between the printing mechanism and the paper roll holder, and the paper inlet of the printing mechanism faces the paper roll holder.

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