A print head assembly for a printer

Abstract

The application discloses a printing head assembly structure of a printer, which comprises a base, a pair of supports and a substrate. Symmetrical empty-avoiding positions are formed on both ends of the base. A pivoting connection structure and a first clamping structure are arranged between the base and the supports. The substrate is connected with the supports through a second clamping structure, and the second clamping structure limits and fixes the substrate between the supports. A thermal sensitive sheet is adapted on the upper part of the substrate, and a limiting structure is arranged between the thermal sensitive sheet and the supports. The supports are installed on both ends of the substrate through the second clamping structure in advance. The thermal sensitive sheet is inserted into the supports through a guide channel and arranged on the substrate. The upper surface of the thermal sensitive sheet is pressed by the limiting structure, and the thermal sensitive sheet and the substrate are completely assembled and fixed on the cavity of the supports. The supports with the assembled thermal sensitive sheet and substrate are aligned on the base through the pivoting connection structure, and then the supports are rotated to be close to the base, so that the supports and the empty-avoiding positions of the base are completely clamped and fixed through the first clamping structure.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of printers, and particularly relates to a printing head assembly structure of a printer. BACKGROUND

[0002] The heat-sensitive printer is a type of printer that realizes printing through heating of a heat-sensitive sheet, and is one of common types of printers. The heat-sensitive printing head is one of core accessories. The existing printing head structure is complex, resulting in relatively complex and tedious assembly. SUMMARY

[0003] The present application aims to provide a printing head assembly structure of a printer to solve the problems in the background art.

[0004] Therefore, the present application provides a printing head assembly structure of a printer, which comprises:

[0005] A base, symmetrical empty spaces are provided on both ends of the base;

[0006] A pair of brackets, a pivot connection structure and a first clamping structure are provided between the bracket and the base. When the bracket is assembled on the base, the bracket is first aligned with the base through the pivot connection structure. When the bracket is aligned with the base through the pivot connection structure, the bracket is rotated by a certain angle on the side close to the base to be clamped on the other side of the bracket through the first clamping structure, and the bracket and the base are completely fixed.

[0007] A substrate, connected to the bracket through a second clamping structure, the substrate is fixed between the pair of brackets through the second clamping structure;

[0008] A heat-sensitive sheet, adapted to the upper part of the substrate, a limiting structure is provided between the heat-sensitive sheet and the bracket, the substrate and the heat-sensitive sheet are completely fixed between the brackets through the limiting structure.

[0009] In the present application, further embodiments are that the bracket is provided with a cavity, the pivot connection structure and the first clamping structure are respectively distributed on the front and back sides of the cavity, the second clamping mechanism is arranged in the cavity, the limiting structure is located above the cavity, and the upper and lower sides formed by the heat-sensitive sheet and the substrate are respectively fixed between the cavity and the limiting structure.

[0010] In the present application, further embodiments are that the pivot connection structure comprises a positioning shaft formed on the base, and a waist-shaped groove arranged on one side of the bracket opposite to the positioning shaft. When the bracket and the base are arranged through the waist-shaped groove and the positioning shaft, the bracket and the base only have axial and rotational degrees of freedom along the positioning shaft.

[0011] In the present application, further embodiments are that convexities are formed on the upper and lower sides of the opening of the waist-shaped slot, so that the positioning shaft is positioned in the waist-shaped slot and cannot be separated from the convexities.

[0012] In the present application, further embodiments are that the first clamping structure includes a bent portion formed on the lower part of the other side of the bracket away from the waist-shaped slot, the bent portion can pass through the air avoidance position, a first rib position is formed on one side of the bent portion, and the first rib position is clamped and adapted to the bottom of the air avoidance position. When the bracket and the base are positioned in place through the pivotal connection structure, the bracket is pressed close to the base, so that the first rib position is clamped and fixed to the bottom surface of the air avoidance position.

[0013] In the present application, further embodiments are that the second clamping structure includes a second rib position formed on one side wall of the accommodating cavity, and a groove opened on one side of the base plate, the second rib position is clamped and adapted to the groove, so that the bracket is mounted on both ends of the base plate, and the both ends of the base plate are accommodated in the accommodating cavity.

[0014] In the present application, further embodiments are that the limiting structure includes a limiting rib formed on the bracket, and the limiting rib is located above the accommodating cavity. When the base plate and the thermal sensitive sheet are connected to the bracket, the bottom of the limiting rib abuts against the upper surface of the thermal sensitive sheet, so that the base plate and the thermal sensitive sheet are fixed on the bracket.

[0015] In the present application, further embodiments are that the base is provided with a limiting block, and the inner wall of the limiting block is attached to the outer side of the bracket.

[0016] In the present application, further embodiments are that the bracket is provided with a guide channel on the front and rear sides between the accommodating cavity and the limiting block, and the thermal sensitive sheet can pass into the bracket through the guide channel.

[0017] In the present application, further embodiments are that the base is provided with a positioning hole in the bottom, the positioning hole is provided with a positioning column, a spring is sleeved on the positioning column, and the spring is elastically abutted between the positioning column and the bottom surface of the base plate.

[0018] The present application has the following beneficial effects:

[0019] The printing head assembly structure includes a pair of brackets, base plates, thermal sensitive sheets and bases. When assembled, the bracket is mounted on both ends of the base plate through the second clamping structure, the thermal sensitive sheet is inserted into the bracket through the guide channel and arranged on the base plate, and the thermal sensitive sheet and the base plate are completely assembled and fixed on the accommodating cavity of the bracket through the limiting structure.

[0020] The support assembled with the thermal sensitive sheet and the substrate is firstly positioned on the base through the pivotal connection structure, then the support is rotated to be close to the base, so that the clearance between the support and the base is completely clamped and fixed through the first clamping structure, thereby the assembly of the support and the base is completed, and the printing head assembly structure does not need to be fastened by punching screw throughout the whole process, and the assembly is simple, fast and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0022] Figure 2 It is a schematic diagram of the exploded structure of the present application;

[0023] Figure 3 It is a schematic diagram of the assembly structure between the substrate, the thermal sensitive sheet and the support;

[0024] Figure 4 It is a schematic diagram of the exploded structure of the present application; Figure 3

[0025] Figure 5 It is a schematic diagram of the assembly process structure of the support and the base;

[0026] Figure 6 It is a schematic diagram of the structure of the support. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0028] In the description of the present application, it should be noted that the terms used herein are only for describing the specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For the convenience of description, the sizes of the parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those skilled in the relevant art can not be discussed in detail, but should be regarded as part of the authorized specification under appropriate circumstances. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary, and not as a limitation. Therefore, other examples of the exemplary embodiments can have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in the subsequent drawings.

[0029] ​It should be noted that the terms "first", "second", and the like in the description and claims of the application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the use of such terms as "first" and "second" are arbitrary labels and are used merely for purposes of nomenclature. For example, a first element could be termed a second element without departing from the scope of the application. Furthermore, the terms "comprise", "comprising", "include", "including", and the like are used synonymously with the term "containing" or "containing at least" in the description and claims of the application. It will be appreciated that the scope of embodiments of the present application is not limited to specific embodiments described or illustrated. Many modifications, variations, alternatives and equivalents will be apparent to those skilled in the art in light of the foregoing disclosure. Accordingly, the scope of the present application will be governed by the following claims and their equivalents.

[0030] It should be noted that in the description of the present application, the terms of orientation such as "front, back, up, down, left, right", "horizontal, vertical, perpendicular, horizontal" and "top, bottom" and the like indicated orientation or position relationship is generally based on the orientation or position relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, in the absence of the opposite description, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the scope of protection of the present application; the orientation words "inner, outer" refer to the inner and outer of the contour of each component.

[0031] It should be noted that in the present application, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or device. Without more limitation, the element defined by the sentence "including a" does not exclude the existence of other identical elements in the process, method, article or device including the element. In addition, it should be pointed out that the scope of the method and device in the embodiments of the present application is not limited to performing functions in the order shown or discussed, but can also include performing functions in a substantially simultaneous manner or in the opposite order according to the functions involved, for example, the described method can be performed in an order different from that described, and various steps can also be added, omitted or combined. In addition, the features described with reference to certain examples can be combined in other examples.

[0032] Embodiment 1

[0033] The embodiment provides a print head assembly structure of a printer, comprising:

[0034] The base 1 is symmetrically provided with an empty space 10 on both ends, and the empty space 10 is a through slot structure.

[0035] The print head assembly structure further comprises a pair of supports 2, a pivoting connection structure and a first clamping structure are arranged between the supports 2 and the base 1, the pivoting connection structure mainly realizes the pre-positioning between the supports 2 and the base 1, under the cooperation of the pivoting connection structure, the supports 2 are first inserted into the base 1 for pre-positioning, at this time, there is only a rotational degree of freedom and a degree of freedom along the length direction of the base 1 between the supports 2 and the base 1, secondly, the supports 2 can be completely assembled and fixed on the base 1 through the first clamping structure, the pre-positioning and then the fastening assembly process before and after the assembly make the assembly more accurate, compared with the one-time assembly method, the assembly failure rate is reduced, and the assembly is more accurate.

[0036] When the supports 2 are assembled on the base 1, the supports 2 are first arranged in position with the base 1 through the pivoting connection structure, when one side of the supports 2 is arranged in position with the base 1 through the pivoting connection structure, the other side of the supports 2 is clamped on the clearance 10 through the first clamping structure by rotating the side of the supports 2 close to the base 1 by a certain angle, and the supports 2 are completely fixed with the base 1.

[0037] The print head assembly structure of the embodiment further comprises a substrate 3, the substrate 3 is connected with the supports 2 through a second clamping structure, the substrate 3 is limited and fixed between the pair of supports 2 by the second clamping structure, before the supports 2 are installed on the base 1, the substrate 3 is assembled with the supports 2 through the second clamping structure, under the limiting of the second clamping structure, the substrate 3 can be quickly and accurately assembled with the supports 2, the base 1 is provided with a positioning hole 11 at the bottom, the positioning hole 11 is provided with a positioning column 12, a spring 13 is sleeved on the positioning column 12, and the spring 13 is elastically abutted between the positioning column 12 and the bottom surface of the substrate 3.

[0038] In the embodiment, the print head assembly structure further comprises a thermal sensitive sheet 4, the thermal sensitive sheet 4 is adapted on the upper part of the substrate 3, a limiting structure is arranged between the thermal sensitive sheet 4 and the supports 2, the substrate 3 and the thermal sensitive sheet 4 are completely limited and fixed between the supports 2 through the limiting structure, before the supports 2 are assembled on the base 1, the substrate 3 is assembled on the supports 2 first, and then the thermal sensitive sheet 4 is assembled on the supports 2 through the limiting structure, and the thermal sensitive sheet 4 is tightly adapted on the substrate 3.

[0039] In the embodiment, more specifically, the supports 2 are provided with a cavity 20, the pivoting connection structure and the first clamping structure are respectively arranged on the front and back sides of the cavity 20, the second clamping structure is arranged in the cavity 20, and the limiting structure is located above the cavity 20, the upper and lower sides formed by the thermal sensitive sheet 4 and the substrate 3 are respectively limited and fixed between the cavity 20 and the limiting structure.

[0040] Embodiment 2

[0041] A print head assembly structure of a printer comprises:

[0042] The base 1 is symmetrically provided with an empty space 10 at both ends, and the empty space 10 is in the form of a through groove.

[0043] The print head assembly structure further comprises a pair of brackets 2, and a pivoting connection structure and a first clamping structure are arranged between the bracket 2 and the base 1. The pivoting connection structure mainly realizes the pre-positioning between the bracket 2 and the base 1. Under the cooperation of the pivoting connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, there is only the freedom of rotation and the freedom along the length direction of the base 1 between the bracket 2 and the base 1. Then, the bracket 2 is completely assembled and fixed on the base 1 through the first clamping structure. The pre-positioning and then the fastening assembly make the assembly more accurate, and compared with the one-time assembly mode, the assembly failure rate is reduced, and the assembly is more accurate.

[0044] When the bracket 2 is assembled on the base 1, the bracket 2 is first arranged in position with the base 1 through the pivoting connection structure. When the bracket 2 is arranged in position with the base 1 through the pivoting connection structure, the bracket 2 is rotated by a certain angle on the side close to the base 1 to make the other side of the bracket 2 clamped on the empty space 10 through the first clamping structure, and the bracket 2 is completely fixed with the base 1.

[0045] The print head assembly structure of the embodiment further comprises a substrate 3, and the substrate 3 is connected with the bracket 2 through a second clamping structure. The substrate 3 is limited and fixed between the pair of brackets 2 by the second clamping structure. Before the bracket 2 is installed on the base 1, the substrate 3 is assembled with the bracket 2 through the second clamping structure. Under the limiting of the second clamping structure, the substrate 3 can be quickly and accurately assembled with the bracket 2. The base 1 is provided with a positioning hole 11 at the bottom, the positioning hole 11 is provided with a positioning column 12, the positioning column 12 is provided with a spring 13, and the spring 13 is elastically abutted between the positioning column 12 and the bottom surface of the substrate 3.

[0046] In the embodiment, the print head assembly structure further comprises a thermal sensitive sheet 4, and the thermal sensitive sheet 4 is adapted on the upper part of the substrate 3. A limiting structure is arranged between the thermal sensitive sheet 4 and the bracket 2, and the substrate 3 and the thermal sensitive sheet 4 are completely limited and fixed between the brackets 2. Before the bracket 2 is assembled on the base 1, the substrate 3 is first assembled on the bracket 2, and then the thermal sensitive sheet 4 is assembled on the bracket 2 through the limiting structure. The thermal sensitive sheet 4 is tightly adapted on the substrate 3.

[0047] In this embodiment, more specifically, the bracket 2 is provided with a cavity 20, the pivot connection structure and the first clamping structure are respectively arranged on the front and rear sides of the cavity 20, the second clamping mechanism is arranged in the cavity 20, and the limiting structure is located above the cavity 20. The upper and lower sides of the heat-sensitive sheet 4 and the substrate 3 are respectively limited and fixed between the cavity 20 and the limiting structure.

[0048] In this embodiment, the pivot connection structure includes a positioning shaft 14 formed on the base 1 and a waist-shaped slot 21 arranged on one side of the bracket 2 opposite the positioning shaft 14. When the bracket 2 is inserted and arranged with the base 1 through the waist-shaped slot 21 and the positioning shaft 14, the bracket 2 and the base 1 only have axial and rotational degrees of freedom along the positioning shaft 14. The design significance of the waist-shaped slot 21 and the positioning shaft 14 is to provide a predetermined position between the bracket 2 and the base 1. The assembly steps are as follows: first, the waist-shaped slot 21 is inserted into the positioning shaft 14 in the axial direction of the positioning shaft 14, then the bracket 2 is moved to the two ends of the base 1, and when the outer side of the bracket 2 abuts against the base 1, the bracket 2 is completely in place. Since the positioning shaft 14 and the waist-shaped slot 21 are in a rotational insertion and arrangement relationship, the bracket 2 can rotate on the base 1 and move along the axial direction of the positioning shaft 14 at the same time.

[0049] Embodiment 3

[0050] A printhead assembly structure of a printer, comprising:

[0051] The base 1 is symmetrically provided with an empty space 10 at both ends, and the empty space 10 is in the form of a through slot.

[0052] The printhead assembly structure further comprises a pair of brackets 2, and a pivot connection structure and a first clamping structure are arranged between the bracket 2 and the base 1. The pivot connection structure mainly realizes the pre-positioning between the bracket 2 and the base 1. Under the cooperation of the pivot connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, the bracket 2 and the base 1 only have a rotational degree of freedom and a degree of freedom along the length direction of the base 1. Then, the bracket 2 is completely assembled and fixed to the base 1 through the first clamping structure. The pre-positioning and then fastening assembly process makes the assembly more accurate, and compared with the one-time assembly method, the assembly failure rate is reduced, and the assembly is more accurate.

[0053] When the bracket 2 is assembled on the base 1, the bracket 2 is first arranged in position with the base 1 through the pivot connection structure. When one side of the bracket 2 is arranged in position with the base 1 through the pivot connection structure, the other side of the bracket 2 is clamped on the empty space 10 through the first clamping structure by rotating the side of the bracket 2 close to the base 1 by a certain angle. The bracket 2 and the base 1 are completely fixed.

[0054] The printing head assembly structure of the embodiment further comprises a substrate 3 connected with the bracket 2 through a second clamping structure, and the substrate 3 is fixed between the pair of brackets 2 by the second clamping structure. Before the bracket 2 is mounted to the base 1, the substrate 3 is assembled with the bracket 2 through the second clamping structure. Under the limiting of the second clamping structure, the substrate 3 can be quickly assembled with the bracket 2. The base 1 is provided with a positioning hole 11 at the bottom, and a positioning column 12 is arranged in the positioning hole 11. A spring 13 is sleeved on the positioning column 12 and elastically abuts between the positioning column 12 and the bottom surface of the substrate 3.

[0055] In the embodiment, the printing head assembly structure further comprises a thermal sheet 4 fitted on the upper part of the substrate 3. A limiting structure is arranged between the thermal sheet 4 and the bracket 2. The substrate 3 and the thermal sheet 4 are completely fixed between the brackets 2 through the limiting structure. Before the bracket 2 is assembled on the base 1, the substrate 3 is assembled on the bracket 2 first, and then the thermal sheet 4 is assembled on the bracket 2 through the limiting structure. The thermal sheet 4 is tightly fitted on the substrate 3.

[0056] In the embodiment, more specifically, the bracket 2 is provided with a containing cavity 20. The pivot connection structure and the first clamping structure are respectively arranged on the front and rear sides of the containing cavity 20. The second clamping mechanism is arranged in the containing cavity 20. The limiting structure is located above the containing cavity 20. The upper and lower sides of the thermal sheet 4 and the substrate 3 are respectively fixed between the containing cavity 20 and the limiting structure.

[0057] In the embodiment, the pivot connection structure comprises a positioning shaft 14 formed on the base 1 and a waist-shaped groove 21 arranged on one side of the bracket 2 opposite to the positioning shaft 14. When the bracket 2 is inserted and arranged with the base 1 through the waist-shaped groove 21 and the positioning shaft 14, the bracket 2 and the base 1 only have the axial freedom and the rotational freedom along the positioning shaft 14. The design significance of the waist-shaped groove 21 and the positioning shaft 14 is to provide the pre-positioning between the bracket 2 and the base 1. The assembly step is to first insert the waist-shaped groove 21 to the positioning shaft 14 in the axial direction of the positioning shaft 14, and then push the bracket 2 to move to the two ends of the base 1. When the outer side of the bracket 2 abuts against the base 1, it is completely in place. Since the positioning shaft 14 and the waist-shaped groove 21 are in a rotating insertion and fitting relationship, the bracket 2 can rotate on the base 1 and can move along the axial direction of the positioning shaft 14 at the same time.

[0058] In this embodiment, further, in order to avoid dislocation of the support 2 when moving to the two ends of the base 1 after the waist-shaped slot 21 and the positioning shaft 14 are inserted, further, a convex bump 210 is formed on the upper and lower sides of the opening of the waist-shaped slot 21, so that the positioning shaft 14 is positioned in the waist-shaped slot 21 and cannot be separated from the convex bump 210, thereby avoiding dislocation of the assembly adjustment of the support 2 and ensuring normal assembly.

[0059] Embodiment 4

[0060] A print head assembly structure of a printer comprises:

[0061] The base 1 is symmetrically provided with an empty space 10 at the two ends, and the empty space 10 is a through slot structure.

[0062] The print head assembly structure further comprises a pair of supports 2, and a pivoting connection structure and a first clamping structure are arranged between the support 2 and the base 1. The pivoting connection structure mainly realizes the pre-positioning between the support 2 and the base 1. Under the cooperation of the pivoting connection structure, the support 2 is first inserted into the base 1 for pre-positioning. At this time, there is only a rotational degree of freedom and a degree of freedom along the length direction of the base 1 between the support 2 and the base 1. Secondly, the first clamping structure can be used to completely assemble and fix the support 2 on the base 1. The pre-positioning and then the fastening assembly process make the assembly more accurate, and compared with the one-time assembly method, the assembly failure rate is reduced, and the assembly is more accurate.

[0063] When the support 2 is assembled on the base 1, the support 2 is first arranged in position with the base 1 through the pivoting connection structure. When one side of the support 2 is arranged in position with the base 1 through the pivoting connection structure, the other side of the support 2 is clamped on the empty space 10 through the first clamping structure by rotating the side of the support 2 close to the base 1 by a certain angle, and the support 2 is completely fixed with the base 1.

[0064] The print head assembly structure of this embodiment further comprises a substrate 3, and the substrate 3 is connected with the support 2 through a second clamping structure. The second clamping structure limits the substrate 3 to be fixed between the pair of supports 2. Before the support 2 is installed on the base 1, the substrate 3 is assembled with the support 2 through the second clamping structure. Under the limiting of the second clamping structure, the substrate 3 can be quickly and accurately assembled with the support 2. The base 1 is provided with a positioning hole 11 at the bottom, the positioning hole 11 is provided with a positioning column 12, the positioning column 12 is sleeved with a spring 13, and the spring 13 is elastically abutted between the positioning column 12 and the bottom surface of the substrate 3.

[0065] In the embodiment, the print head assembly structure further comprises a thermal sheet 4, which is fitted on the upper part of the substrate 3, and a limiting structure is arranged between the thermal sheet 4 and the bracket 2. The substrate 3 and the thermal sheet 4 are completely limited and fixed between the bracket 2 by the limiting structure. Before the bracket 2 is assembled to the base 1, the substrate 3 is assembled to the bracket 2 first, and then the thermal sheet 4 is assembled to the bracket 2 through the limiting structure. The thermal sheet 4 is tightly fitted on the substrate 3.

[0066] In the embodiment, more specifically, the bracket 2 is provided with a containing cavity 20. The pivot connection structure and the first clamping structure are respectively arranged on the front and rear sides of the containing cavity 20. The second clamping mechanism is arranged in the containing cavity 20. The limiting structure is located above the containing cavity 20. The upper and lower sides of the thermal sheet 4 and the substrate 3 are respectively limited and fixed between the containing cavity 20 and the limiting structure.

[0067] In the embodiment, the pivot connection structure comprises a positioning shaft 14 formed on the base 1 and a waist-shaped slot 21 arranged on one side of the bracket 2 and opposite to the positioning shaft 14. When the bracket 2 is inserted and arranged with the base 1 through the waist-shaped slot 21 and the positioning shaft 14, only the axial freedom and the rotational freedom exist between the bracket 2 and the base 1 along the positioning shaft 14. The design significance of the waist-shaped slot 21 and the positioning shaft 14 is to provide the pre-positioning between the bracket 2 and the base 1. The assembly step is to first insert the waist-shaped slot 21 to the positioning shaft 14 in the axial direction of the positioning shaft 14, then push the bracket 2 to move to the two ends of the base 1. When the outer side of the bracket 2 and the base 1 abut, it is completely in place. Since the positioning shaft 14 and the waist-shaped slot 21 are in a rotational insertion and fitting relationship, at this time, the bracket 2 can rotate on the base 1 and can also move along the axial direction of the positioning shaft 14.

[0068] In the embodiment, further, in order to avoid dislocation of the bracket 2 when moving to the two ends of the base 1 after the waist-shaped slot 21 and the positioning shaft 14 are inserted, a convex bump 210 is further formed on the upper and lower sides of the opening of the waist-shaped slot 21, so that the positioning shaft 14 is positioned in the waist-shaped slot 21 and cannot be separated from the convex bump 210, thereby avoiding dislocation of the bracket 2 during assembly and adjustment, and ensuring normal assembly.

[0069] In the embodiment, the first clamping structure comprises a bent part 22 formed on the lower part of the other side of the bracket 2 away from the waist-shaped slot 21. The bent part 22 can pass through the avoidance position 10. A first muscle position 220 is formed on one side of the bent part 22. The first muscle position 220 is clamped and fitted with the bottom of the avoidance position 10. After the bracket 2 is positioned in place with the base 1 through the pivot connection structure, the bracket 2 is pressed close to the base 1, so that the first muscle position 220 is clamped and fixed to the bottom surface of the avoidance position 10.

[0070] In the embodiment, the second clamping structure comprises a second rib 23 formed on one side wall of the accommodating cavity 20 and a groove 30 opened on one side of the base plate 3, the second rib 23 is clamped and matched with the groove 30, so that the bracket 2 is installed on both ends of the base plate 3, both ends of the base plate 3 are accommodated in the accommodating cavity 20, and when the base plate 3 and the bracket 2 are assembled, the bracket 2 is inserted into both ends of the base plate 3 after the second rib 23 is aligned with the groove 30.

[0071] Embodiment 5

[0072] A print head assembly structure of a printer comprises:

[0073] The base 1 is symmetrically provided with an empty space 10 on both ends, and the empty space 10 is in the form of a through groove.

[0074] The print head assembly structure further comprises a pair of brackets 2, and a pivoting connection structure and a first clamping structure are arranged between the bracket 2 and the base 1. The pivoting connection structure mainly realizes the pre-positioning between the bracket 2 and the base 1. Under the cooperation of the pivoting connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, the bracket 2 and the base 1 only have the freedom of rotation and the freedom along the length direction of the base 1. Then, the bracket 2 is completely assembled and fixed on the base 1 through the first clamping structure. The pre-positioning and then the fastening assembly make the assembly more accurate, and compared with the one-time assembly method, the assembly failure rate is reduced, and the assembly is more accurate.

[0075] When the bracket 2 is assembled on the base 1, the bracket 2 is first aligned with the base 1 through the pivoting connection structure. When one side of the bracket 2 is aligned with the base 1 through the pivoting connection structure, the other side of the bracket 2 is clamped on the empty space 10 through the first clamping structure, and the bracket 2 is rotated by a certain angle towards one side of the base 1. The bracket 2 and the base 1 are completely fixed.

[0076] The print head assembly structure of the embodiment further comprises a base plate 3, and the base plate 3 is connected with the bracket 2 through a second clamping structure. The base plate 3 is limited and fixed between the pair of brackets 2 through the second clamping structure. Before the bracket 2 is installed on the base 1, the base plate 3 is assembled with the bracket 2 through the second clamping structure. Under the limiting of the second clamping structure, the base plate 3 can be quickly and accurately assembled with the bracket 2.

[0077] In the embodiment, the printhead assembly structure further comprises a thermal sheet 4, which is fitted on the upper portion of the substrate 3, and a limiting structure is arranged between the thermal sheet 4 and the bracket 2, so that the substrate 3 and the thermal sheet 4 are completely limited and fixed between the bracket 2 by the limiting structure. Before the bracket 2 is assembled to the base 1, the substrate 3 is first assembled to the bracket 2, and then the thermal sheet 4 is assembled to the bracket 2 through the limiting structure. The thermal sheet 4 is tightly fitted on the substrate 3. The base 1 is provided with a positioning hole 11 at the bottom, and a positioning column 12 is arranged in the positioning hole 11. A spring 13 is sleeved on the positioning column 12 and elastically abuts between the positioning column 12 and the bottom surface of the substrate 3.

[0078] In the embodiment, more specifically, the bracket 2 is provided with a containing cavity 20, the pivot connection structure and the first clamping structure are respectively arranged on the front and rear sides of the containing cavity 20, the second clamping mechanism is arranged in the containing cavity 20, and the limiting structure is located above the containing cavity 20. The upper and lower sides formed by the thermal sheet 4 and the substrate 3 are respectively limited and fixed between the containing cavity 20 and the limiting structure.

[0079] In the embodiment, the pivot connection structure comprises a positioning shaft 14 formed on the base 1 and a waist-shaped groove 21 arranged on one side of the bracket 2 and opposite to the positioning shaft 14. When the bracket 2 is inserted and arranged with the base 1 through the waist-shaped groove 21 and the positioning shaft 14, only the axial freedom and the rotational freedom exist between the bracket 2 and the base 1 along the positioning shaft 14. The design significance of the waist-shaped groove 21 and the positioning shaft 14 is to provide the pre-positioning between the bracket 2 and the base 1. The assembly step is to first insert the waist-shaped groove 21 to the positioning shaft 14 in the axial direction of the positioning shaft 14, then push the bracket 2 to move to the two ends of the base 1. When the outer side of the bracket 2 abuts against the base 1, it is completely in place. Since the positioning shaft 14 and the waist-shaped groove 21 are in a rotational insertion and fitting relationship, the bracket 2 can rotate on the base 1 at this time, and can also move along the axial direction of the positioning shaft 14.

[0080] In the embodiment, further, in order to avoid dislocation of the bracket 2 when moving to the two ends of the base 1 after the waist-shaped groove 21 and the positioning shaft 14 are inserted, a convex bump 210 is further formed on the upper and lower sides of the opening of the waist-shaped groove 21, so that the positioning shaft 14 is positioned in the waist-shaped groove 21 and cannot be separated from the convex bump 210, thereby avoiding dislocation of the bracket 2 during assembly and adjustment, and ensuring normal assembly.

[0081] In the embodiment, the first clamping structure comprises a bent portion 22 formed on the lower portion of the bracket 2 on the side away from the waist-shaped slot 21, the bent portion 22 can pass through the air-avoiding position 10, a first rib position 220 is formed on one side of the bent portion 22, the first rib position 220 is clamped and adapted to the bottom of the air-avoiding position 10, when the bracket 2 is positioned with the base 1 through the pivotal connection structure, the bracket 2 is pressed close to the base 1, so that the first rib position 220 is clamped and fixed to the bottom surface of the air-avoiding position 10.

[0082] In the embodiment, the second clamping structure comprises a second rib position 23 formed on one side wall of the accommodating cavity 20, and a groove 30 opened on one side of the substrate 3, the second rib position 23 is clamped and adapted to the groove 30, so that the bracket 2 is installed on both ends of the substrate 3, both ends of the substrate 3 are accommodated in the accommodating cavity 20, when the substrate 3 and the thermal sensitive sheet 4 are assembled with the bracket 2, the bracket 2 is inserted on both ends of the substrate 3 after the second rib position 23 is aligned with the groove 30.

[0083] In the embodiment, further, the limiting structure comprises a limiting rib 24 formed on the bracket 2, the limiting rib 24 is located above the accommodating cavity 20, when the substrate 3 and the thermal sensitive sheet 4 are connected on the bracket 2, the bottom of the limiting rib 24 abuts against the upper surface of the thermal sensitive sheet 4, so that the substrate 3 and the thermal sensitive sheet 4 are fixed on the bracket 2, and further, guide channels 25 are arranged on the front and back sides of the bracket 2 between the accommodating cavity 20 and the limiting block 15, the thermal sensitive sheet 4 can pass into the bracket 2 through the guide channels 25, so that the thermal sensitive sheet 4 can be smoothly and correctly pushed onto the substrate 3, and then the thermal sensitive sheet 4 and the substrate 3 are tightly pressed on the bracket 2 through the limiting rib 24 to complete the correct assembly, finally, the bracket 2 and the base 1 are pre-positioned through the pivotal connection structure, the bent portion 22 on the first clamping structure passes through the air-avoiding position 10, and the first rib position 220 is clamped on the bottom surface of the air-avoiding position 10 to complete the assembly.

[0084] Further, the limiting blocks 15 are arranged on both sides of the air-avoiding position 10 of the base 1, the inner wall of the limiting block 15 is attached to the outer side of the bracket 2, so as to limit the bracket 2 from separating from the base 1.

[0085] The embodiments of the present application are described above with reference to the drawings, the embodiments and the features in the embodiments in the present application can be combined with each other without conflict, the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative but not limited, the person skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, all of which belong to the protection of the present application.

Claims

1. A print head assembly structure for a printer, characterized in that: include: The base has symmetrically opened spaces at both ends; The brackets are arranged in pairs, and a pivot connection structure and a first clamping structure are provided between the brackets and the base. When the brackets are assembled on the base, the brackets are first aligned with the base via the pivot connection structure. After one side of the bracket is in place with the base via the pivot connection structure, the bracket is rotated a certain angle closer to the base until the other side of the bracket is clamped in the avoidance position via the first clamping structure, and the brackets are completely fixed to the base. A substrate is connected to the brackets via a second clamping structure, and the second clamping structure constrains and fixes the substrate between the pair of brackets; A thermal sheet is adapted to be mounted on the upper portion of the substrate, and a limiting structure is provided between the thermal sheet and the bracket, so that the substrate and the thermal sheet are completely constrained and fixed between the brackets by the limiting structure; The bracket is provided with a cavity, the pivot connection structure and the first clamping structure are respectively distributed on the front and rear sides of the cavity, the second clamping structure is arranged in the cavity, the limiting structure is located above the cavity, and the upper and lower sides formed by the thermal sheet and the substrate are respectively constrained and fixed between the cavity and the limiting structure; The pivot connection structure includes a positioning shaft formed on the base, and a waist-shaped groove provided on one side of the bracket and arranged opposite to the positioning shaft. When the bracket and the base are plugged into each other through the waist-shaped groove and the positioning shaft, the bracket and the base only have axial freedom and rotational freedom along the positioning shaft. The first clamping structure includes a bent portion formed at the lower portion of the other side of the bracket away from the waist-shaped groove, the bent portion can pass through the avoidance position, and a first rib is formed on one side of the bent portion. The first rib is clamped and adapted to the bottom of the avoidance position. When the bracket and the base are positioned in place through the pivot connection structure, the bracket is pressed close to the base so that the first rib is clamped and fixed to the bottom surface of the avoidance position; The second clamping structure includes a second rib formed on a side wall of the cavity and a groove formed on one side of the substrate. The second rib and the groove are clamped and adapted to each other, so that the bracket is mounted on both ends of the substrate, and the two ends of the substrate are accommodated in the cavity. The limiting structure includes a limiting rib formed on the bracket, the limiting rib is located above the cavity, and when the substrate and the thermal sheet are connected to the bracket, the bottom of the limiting rib abuts against the upper surface of the thermal sheet, so that the substrate and the thermal sheet are fixed to the bracket; A limit block is provided on the base, and the inner wall of the limit block is in contact with the outer side surface of the bracket; Guide channels are provided on the front and rear sides of the bracket between the cavity and the limiting block, and the thermal sheet penetrates into the bracket through the guide channels.

2. The print head assembly structure of a printer according to claim 1, characterized in that: The upper and lower sides of the opening of the waist-shaped groove form convex hulls, so that the positioning shaft is positioned in the waist-shaped groove and cannot escape from the convex hulls.

3. The print head assembly structure of a printer according to claim 1, characterized in that: A positioning hole is provided at the bottom of the base, a positioning post is provided in the positioning hole, a spring is sleeved on the positioning post, and the spring elastically abuts between the positioning post and the bottom surface of the base plate.

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