Fastening structure for paper feeding central shaft of thermal transfer printer

Abstract

The utility model provides a fastening structure of a paper feeding center shaft of a thermal transfer printer. The fastening structure of the paper feeding center shaft of the thermal transfer printer comprises a center shaft, a gear disc, a limiting plate, a reinforcing plate, a synchronizing wheel, an expansion sleeve and a plurality of positioning screws. In the working process of the fastening structure of the paper feeding center shaft of the thermal transfer printer, the sleeve of the conical tubular structure is inserted into the positioning conical hole to be firmly connected with the gear disc, the limiting plate, the reinforcing plate and the synchronizing wheel. And one end of the central shaft is inserted into the sleeve and is connected with the sleeve. And each positioning screw is correspondingly inserted into one second fixing hole and one first fixing hole to connect the annular connecting disc with the synchronizing wheel. Therefore, the central shaft is firmly fixed on the synchronizing wheel. The paper feeding center shaft of the thermal transfer printer is high in working stability, and the mechanical connecting part of the center shaft cannot be loosened in a long-time working state, so that the working stability of the thermal transfer printer is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat transfer printer paper center shaft field, especially heat transfer printer paper center shaft's fastening structure of tight. BACKGROUND

[0002] Heat transfer printer is through the ink head and combines various different colors of ink and prints on the heat transfer paper, and presents the pattern we want on the heat transfer paper. The ink head is installed on the printing trolley assembly, and the trolley drives the ink head to move transversely and reciprocally to print the pattern on the heat transfer paper, and then the heat transfer paper is moved forward by the forward rolling paper center shaft to meet the printing demand. In the process of "paper feeding", the stable rotation of the paper center shaft is very important. Once the mechanical connection part of the paper center shaft is loose, the rotation will be unstable, which may cause the problems of paper arching or inaccurate stepping. These problems will directly affect the printing accuracy and finally have adverse effects on the effect of the printed product.

[0003] However, the traditional heat transfer printer, such as the patent with the application number CN202323491623.7 and the patent name "adjustable heat transfer printer", has low working stability of the paper center shaft. In the long-term working state, the mechanical connection part of the paper center shaft will be loose, thereby affecting the working stability of the heat transfer printer. UTILITY MODEL CONTENT

[0004] Therefore, it is necessary to provide a fastening structure of a heat transfer printer paper center shaft to solve the technical problems of low efficiency, high labor intensity and high labor cost of manual feeding.

[0005] A fastening structure of a heat transfer printer paper center shaft, comprising: a center shaft, a gear disc, a limiting plate, a reinforcing plate, a synchronous wheel, an expansion sleeve and a plurality of positioning screws.

[0006] A plurality of driving teeth are uniformly arranged on the side wall of the gear disc in a circle; a first through taper hole is formed in the middle region of the gear disc; one side of the gear disc is connected with the limiting plate, and a second through taper hole is formed in the middle region of the limiting plate; the reinforcing plate is connected with the side of the limiting plate away from the gear disc, and a third through taper hole is formed in the middle region of the reinforcing plate; the synchronous wheel is connected with the side of the reinforcing plate away from the limiting plate, and a fourth through taper hole is formed in the middle region of the synchronous wheel; the first through taper hole, the second through taper hole, the third through taper hole and the fourth through taper hole are connected with each other to form a positioning taper hole; a plurality of first fixing holes are uniformly formed in the side of the synchronous wheel away from the reinforcing plate, and each first fixing hole is formed in the circumference of the synchronous wheel;

[0007] The expansion sleeve includes a sleeve and an annular connecting disk; the sleeve is a conical tubular structure, and the end of the sleeve with a larger width is connected to the middle area of ​​the annular connecting disk; the side wall of the sleeve is provided with a first wide limit opening, and the annular connecting disk is provided with a second wide limit opening, and the first wide limit opening is connected to the second wide limit opening; the sleeve is adapted to the positioning conical hole, and the sleeve is inserted into the positioning conical hole; the inner diameter of the sleeve is consistent from top to bottom and is the same as the inner diameter of the annular connecting disk; the central axis is adapted to the sleeve, and one end of the central axis is inserted in the sleeve and connected to the sleeve; a plurality of second fixing holes are evenly provided on the annular connecting disk, and each second fixing hole is correspondingly connected to a first fixing hole; the first fixing hole and the second fixing hole are both adapted to the positioning screw, and each positioning screw is correspondingly inserted into a second fixing hole and a first fixing hole to connect the annular connecting disk to the synchronous wheel together.

[0008] In one embodiment, the gear plate and the limiting plate are integrally formed.

[0009] In one embodiment, the limiting plate and the reinforcing plate are integrally formed.

[0010] In one embodiment, the synchronous wheel and the reinforcing plate are integrally formed.

[0011] In one embodiment, the diameter of the limiting plate is greater than the diameter of the gear plate.

[0012] In one embodiment, the size of the reinforcement plate is smaller than the size of the gear plate.

[0013] In one embodiment, the sleeve and the annular connecting disk are integrally formed.

[0014] In one embodiment, the limiting plate is a circular plate structure.

[0015] In one embodiment, the reinforcing plate is a circular plate structure.

[0016] In one embodiment, the size of the reinforcing plate is smaller than the size of the limiting plate.

[0017] The fastening structure of the paper feeding center shaft of the heat transfer printer inserts the sleeve of the conical tubular structure into the positioning conical hole to firmly connect the gear plate, the limiting plate, the reinforcing plate and the synchronous wheel together in the working process. One end of the center shaft is inserted into the sleeve and connected with the sleeve. Each positioning screw is inserted into a second fixing hole and a first fixing hole to connect the annular connecting disc with the synchronous wheel. Thus, the center shaft is firmly fixed on the synchronous wheel. The working stability of the paper feeding center shaft of the heat transfer printer is high. In the long-time working state, the mechanical connection part of the center shaft will not be loose, thereby ensuring the working stability of the heat transfer printer. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a disassembled structure schematic view of the fastening structure of the paper feeding center shaft of the heat transfer printer in an embodiment.

[0019] Figure 2 It is a sectional view of the fastening structure of the paper feeding center shaft of the heat transfer printer in an embodiment. Figure 1 It is a sectional view of the fastening structure of the paper feeding center shaft of the heat transfer printer in an embodiment.

[0020] Figure 3 It is a disassembled structure schematic view of the fastening structure of the paper feeding center shaft of the heat transfer printer in an embodiment.

[0021] Figure 4 It is a structure schematic view of the expansion sleeve in an embodiment. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, many specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below. In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying 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.

[0023] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and do not connote or imply any relative importance or any meaning pertaining to the quantity of the features being described. Thus, a feature defined with "first", "second", etc. can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. 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.

[0025] In the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature. The first and second features can be in direct contact, or the first and second features can be in indirect contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0026] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on another element or there can be a middle element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only embodiment.

[0027] Please see Figures 1 to 4 The present application provides a fastening structure of a paper feed center shaft of a thermal transfer printer, which comprises a center shaft 100, a gear plate 200, a limiting plate 300, a reinforcing plate 400, a synchronous wheel 500, an expansion sleeve 600 and a plurality of positioning screws 700.

[0028] The side wall of the gear disc 200 is uniformly provided with a plurality of driving teeth in a circle. The middle region of the gear disc 200 is provided with a first through taper hole. One side of the gear disc 200 is connected with the limiting plate 300. In this embodiment, the gear disc 200 and the limiting plate 300 are integrally formed. The diameter of the limiting plate 300 is larger than that of the gear disc 200. The limiting plate 300 is a circular plate structure. The middle region of the limiting plate 300 is provided with a second through taper hole. The reinforcing plate 400 is connected with the side of the limiting plate 300 away from the gear disc 200. In this embodiment, the limiting plate 300 and the reinforcing plate 400 are integrally formed. The size of the reinforcing plate 400 is smaller than that of the limiting plate 300. The reinforcing plate 400 is a circular plate structure. The middle region of the reinforcing plate 400 is provided with a third through taper hole. The synchronous wheel 500 is connected with the side of the reinforcing plate 400 away from the limiting plate 300. In this embodiment, the reinforcing plate 400 and the synchronous wheel 500 are integrally formed. The size of the reinforcing plate 400 is smaller than that of the gear disc 200. The middle region of the synchronous wheel 500 is provided with a fourth through taper hole. The first through taper hole, the second through taper hole, the third through taper hole and the fourth through taper hole are communicated to form the positioning taper hole 101. The side of the synchronous wheel 500 away from the reinforcing plate 400 is uniformly provided with a plurality of first fixing holes 501. Each first fixing hole 501 is circumferentially provided at the edge of the synchronous wheel 500.

[0029] The expansion sleeve 600 comprises a sleeve 610 and an annular connecting disc 620. The sleeve 610 is a tapered tubular structure. The end of the sleeve 610 with a larger width is connected with the middle region of the annular connecting disc 620. In this embodiment, the sleeve 610 and the annular connecting disc 620 are integrally formed. The side wall of the sleeve 610 is provided with a first wide limiting port 601. The annular connecting disc 620 is provided with a second wide limiting port 602. The first wide limiting port 601 and the second wide limiting port 602 are communicated. The sleeve 610 is matched with the positioning taper hole 101. The sleeve 610 is inserted into the positioning taper hole 101. The inner diameter of the sleeve 610 is consistent from top to bottom and is the same as the inner diameter of the annular connecting disc 620. The center shaft 100 is matched with the sleeve 610. One end of the center shaft 100 is inserted into the sleeve 610 and connected with the sleeve 610. The annular connecting disc 620 is uniformly provided with a plurality of second fixing holes 603. Each second fixing hole 603 is communicated with a first fixing hole 501. The first fixing hole 501 and the second fixing hole 603 are matched with the positioning screw 700. Each positioning screw 700 is inserted into a second fixing hole 603 and a first fixing hole 501 to connect the annular connecting disc 620 and the synchronous wheel 500 together.

[0030] The fastening structure of the paper feed center shaft 10 of the thermal transfer printer firmly connects the sleeve 610 of the conical tubular structure in the positioning conical hole 101 with the gear plate 200, the limiting plate 300, the reinforcing plate 400 and the synchronous wheel 500. One end of the center shaft 100 is inserted into the sleeve 610 and connected with the sleeve 610. Each positioning screw 700 is inserted into a second fixing hole 603 and a first fixing hole 501 to connect the annular connecting disc 620 with the synchronous wheel 500. Thus, the center shaft 100 is firmly fixed on the synchronous wheel 500. The working stability of the paper feed center shaft 10 of the thermal transfer printer is high. In the long-time working state, the mechanical connection part of the center shaft 100 will not be loose, thus ensuring the working stability of the thermal transfer printer.

[0031] The technical features of the above-described embodiments can be combined in any manner. For the sake of brevity, not all possible combinations of the technical features in the above-described embodiments are described, but it should be understood that any combination of the technical features is within the scope of the present disclosure as long as the combination does not result in contradictions.

[0032] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the present application. It should be noted that, for those skilled in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A fastening structure for the paper feed center shaft of a thermal transfer printer, characterized in that: include: Center shaft, gear plate, limit plate, reinforcement plate, synchronous wheel, expansion sleeve and several positioning screws; The side wall of the gear plate is evenly provided with a plurality of driving teeth in a circumferential manner; a first through-conical hole is opened in the middle area of ​​the gear plate; one side of the gear plate is connected to the limit plate, and a second through-conical hole is opened in the middle area of ​​the limit plate; the reinforcing plate is connected to the side of the limit plate facing away from the gear plate, and a third through-conical hole is opened in the middle area of ​​the reinforcing plate; the synchronous wheel is connected to the side of the reinforcing plate facing away from the limit plate, and a fourth through-conical hole is opened in the middle area of ​​the synchronous wheel; the first through-conical hole, the second through-conical hole, the third through-conical hole and the fourth through-conical hole are connected to each other to form a positioning conical hole; a plurality of first fixing holes are evenly opened on the side of the synchronous wheel facing away from the reinforcing plate, and each of the first fixing holes is circumferentially opened on the periphery of the synchronous wheel; The expansion sleeve includes a sleeve and an annular connecting disk; the sleeve is a conical tubular structure, and the end of the sleeve with a larger width is connected to the middle area of ​​the annular connecting disk; the side wall of the sleeve is provided with a first wide limit opening, and the annular connecting disk is provided with a second wide limit opening, and the first wide limit opening is connected to the second wide limit opening; the sleeve is adapted to the positioning conical hole, and the sleeve is inserted into the positioning conical hole; the inner diameter of the sleeve is consistent from top to bottom and is the same as the inner diameter of the annular connecting disk; the central axis is adapted to the sleeve, and one end of the central axis is inserted in the sleeve and connected to the sleeve; a plurality of second fixing holes are evenly provided on the annular connecting disk, and each second fixing hole is correspondingly connected to a first fixing hole; the first fixing hole and the second fixing hole are both adapted to the positioning screw, and each positioning screw is correspondingly inserted into a second fixing hole and a first fixing hole to connect the annular connecting disk to the synchronous wheel together.

2. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The gear plate and the limiting plate are integrally formed.

3. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The limiting plate and the reinforcing plate are integrally formed.

4. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The synchronous wheel and the reinforcing plate are integrally formed.

5. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The diameter of the limiting plate is greater than the diameter of the gear plate.

6. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The size of the reinforcing plate is smaller than that of the gear plate.

7. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The sleeve and the annular connecting disk are integrally formed.

8. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The limiting plate is a circular plate structure.

9. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The reinforcing plate is a circular plate structure.

10. The fastening structure of the paper feed center shaft of the thermal transfer printer according to claim 1, characterized in that: The size of the reinforcing plate is smaller than that of the limiting plate.

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