Printing head assembly structure of printer

Abstract

The invention discloses a printing head assembly structure of a printer, which comprises a base, and clearance positions are symmetrically formed in two ends of the base; pivotal connection structures and first clamping structures are arranged between the supports and the base; the base plate is connected with the supports through a second clamping structure, and the base plate is limited and fixed between the paired supports through the second clamping structure; and the thermosensitive sheet is adapted to the upper part of the substrate, and a limiting structure is arranged between the thermosensitive sheet and the bracket. The supports are installed at the two ends of the base plate in advance through the second clamping structures, the thermosensitive pieces are inserted into the supports through the guide channels and arranged on the base plate, the limiting structures abut against the upper surfaces of the thermosensitive pieces, and the thermosensitive pieces and the base plate are completely assembled and fixed to the containing cavities of the supports. The support on which the thermosensitive sheet and the substrate are assembled is aligned to the base through the pivoting connection structure, and then the support is rotated to be close to the base, so that the support and the clearance position of the base are completely clamped and fixed through the first clamping connection structure.

Description

Technical Field

[0001] The invention belongs to the technical field of printers, and in particular relates to a print head assembly structure of a printer. Background Art

[0002] A thermal printer is a type of printer that prints by heating a thermal film. It is one of the most common types of printers, in which the thermal print head is one of the core accessories. The existing print head has a complex structure, which makes the assembly relatively complicated and cumbersome. Summary of the invention

[0003] The object of the present invention is to provide a print head assembly structure for a printer to solve the problems raised in the above background technology.

[0004] In view of this, the present invention provides a print head assembly structure of a printer, comprising: The base has symmetrically opened escape spaces at both ends; The brackets are arranged in pairs, and a pivot connection structure and a first clamping structure are arranged between the brackets and the base. When the brackets are assembled on the base, the brackets are first aligned with the base through the pivot connection structure. When one side of the brackets and the base are arranged in place through the pivot connection structure, the brackets are rotated to a certain angle close to one side of the base until the other side of the brackets is clamped in the avoidance position through the first clamping structure, and the brackets are completely fixed to the base; A base plate connected to the bracket via a second clamping structure, wherein the base plate is restricted and fixed between the paired brackets by the second clamping structure; The thermal sheet is adapted to be mounted on the upper portion of the substrate. A limiting structure is provided between the thermal sheet and the bracket, and the substrate and the thermal sheet are completely restricted and fixed between the brackets by the limiting structure.

[0005] In the present invention, a further implementation scheme is that a cavity is provided on the bracket, the pivot connection structure and the first clamping structure are respectively distributed on the front and rear 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 thermal sheet and the substrate are respectively restricted and fixed between the cavity and the limiting structure.

[0006] In the present invention, a further implementation scheme is that the pivot connection structure includes a positioning axis formed on the base, and a waist-shaped groove arranged on one side of the bracket and configured relative to the positioning axis. When the bracket and the base are plugged into each other through the waist-shaped groove and the positioning axis, there are only axial freedom and rotational freedom along the positioning axis between the bracket and the base.

[0007] In the present invention, a further implementation scheme is that convex hulls are formed on the upper and lower sides of the opening of the waist-shaped groove, so that the positioning shaft is positioned in the waist-shaped groove and cannot be separated from the convex hulls.

[0008] In the present invention, a further implementation scheme is that the first clamping structure includes a bending portion formed at the lower part of the other side of the bracket away from the waist-shaped groove, and the bending portion can pass through the avoidance position. A first rib position is formed on one side of the bending portion, and the first rib position 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 position is clamped and fixed to the bottom surface of the avoidance position.

[0009] In the present invention, a further implementation scheme is that the second clip-on structure includes a second rib formed on one side wall of the cavity, and a groove opened on one side of the substrate, and the second rib and the groove are clip-fitted together so that the bracket is installed on both ends of the substrate, and the two ends of the substrate are accommodated in the cavity.

[0010] In the present invention, a further implementation scheme is that the limiting structure includes limiting ribs formed on the bracket, and the limiting ribs are located above the cavity. When the substrate and the thermal sensitive film are connected to the bracket, the bottom of the limiting ribs abuts against the upper surface of the thermal sensitive film, so that the substrate and the thermal sensitive film are fixed on the bracket.

[0011] In the present invention, a further implementation scheme is that 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.

[0012] In the present invention, a further implementation scheme is that guide channels are provided on the front and rear sides of the bracket between the cavity and the limit block, and the thermal sheet can pass through the guide channels to penetrate into the bracket.

[0013] In the present invention, a further implementation scheme is that a positioning hole is opened at the bottom of the base, a positioning column is arranged in the positioning hole, a spring is sleeved on the positioning column, and the spring elastically abuts between the positioning column and the bottom surface of the substrate.

[0014] The beneficial effects of the present invention are: The print head assembly structure includes a pair of brackets, a substrate, a thermal film and a base. During assembly, the bracket is pre-installed on both ends of the substrate through a second clamping structure, the thermal film is inserted into the bracket through a guide channel and arranged on the substrate, and the thermal film and the substrate are completely assembled and fixed on the cavity of the bracket by pressing the upper surface of the thermal film through a limiting structure.

[0015] The bracket with the thermal film and substrate assembled is first aligned to the base through a pivot connection structure, and then the bracket is rotated close to the base so that the bracket and the base's avoidance position are completely clamped and fixed through a first clamping structure, thereby completing the assembly of the bracket and the base, so that the print head assembly structure does not require drilling and screw tightening throughout the process, and the assembly is simple and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the explosion structure of the present invention; Figure 3 It is a schematic diagram of the assembly structure between the substrate, the thermal film and the bracket; Figure 4 for Figure 3 Schematic diagram of the explosion structure; Figure 5 It is a structural schematic diagram of the assembly process of the bracket and the base; Figure 6 A schematic diagram of the structure of the bracket. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0018] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers 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 subsequent drawings.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0020] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0021] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples.

[0022] Example 1 This embodiment provides a print head assembly structure of a printer, including: The base 1 has symmetrically disposed avoidance spaces 10 at both ends thereof, and the avoidance spaces 10 are through-groove structures.

[0023] The print head assembly structure also includes a bracket 2 arranged in a pair, 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. With the cooperation of the pivot connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, there are only rotational freedom and freedom along the length direction of the base 1 between the bracket 2 and the base 1. Secondly, the bracket 2 can be completely assembled to the base 1 for fixation through the first clamping structure. The front and back matching process of pre-positioning and then tightening and assembling makes the assembly more precise, reduces the assembly error rate compared to the one-time assembly method, and makes the assembly more accurate.

[0024] As mentioned above, when the bracket 2 is assembled on the base 1, the bracket 2 is first aligned with the base 1 through the pivot connection structure. After one side of the bracket 2 is in place with the base 1 through the pivot connection structure, the bracket 2 is rotated a certain angle close to one side of the base 1 until the other side of the bracket 2 is clamped on the avoidance position 10 through the first clamping structure, and the bracket 2 is completely fixed to the base 1.

[0025] The print head assembly structure of the present embodiment also includes a substrate 3, and the substrate 3 is connected to the bracket 2 via a second clamping structure. The second clamping structure restricts and fixes the substrate 3 between the paired brackets 2. Before the bracket 2 is installed on the base 1, the substrate 3 and the bracket 2 are first assembled via the second clamping structure. Under the limitation of the second clamping structure, the substrate 3 can be quickly assembled into place with the bracket 2. A positioning hole 11 is provided at the bottom of the base 1, and a positioning column 12 is provided in the positioning hole 11. A spring 13 is sleeved on the positioning column 12, and the spring 13 elastically abuts between the positioning column 12 and the bottom surface of the substrate 3.

[0026] In this embodiment, the print head assembly structure also includes a thermal film 4, which is adapted to the upper part of the substrate 3. A limiting structure is set between the thermal film 4 and the bracket 2. The substrate 3 and the thermal film 4 are completely restricted and fixed between the bracket 2 through the limiting structure. Before the bracket 2 is assembled to the base 1, the assembly steps are to first assemble the substrate 3 to the bracket 2, and then assemble the thermal film 4 to the bracket 2 through the limiting structure. The thermal film 4 is tightly adapted to the substrate 3.

[0027] In this embodiment, more specifically, a cavity 20 is provided on the bracket 2, the pivot connection structure and the first clamping structure are respectively distributed on the front and rear sides of the cavity 20, the second clamping mechanism is arranged in the cavity 20, the limiting structure is located above the cavity 20, and the upper and lower sides formed by the thermal film 4 and the substrate 3 are respectively restricted and fixed between the cavity 20 and the limiting structure.

[0028] Example 2 A print head assembly structure of a printer, comprising: The base 1 has symmetrically disposed avoidance spaces 10 at both ends thereof, and the avoidance spaces 10 are through-groove structures.

[0029] The print head assembly structure also includes a bracket 2 arranged in a pair, 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. With the cooperation of the pivot connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, there are only rotational freedom and freedom along the length direction of the base 1 between the bracket 2 and the base 1. Secondly, the bracket 2 can be completely assembled to the base 1 for fixation through the first clamping structure. The front and back matching process of pre-positioning and then tightening and assembling makes the assembly more precise, reduces the assembly error rate compared to the one-time assembly method, and makes the assembly more accurate.

[0030] As mentioned above, when the bracket 2 is assembled on the base 1, the bracket 2 is first aligned with the base 1 through the pivot connection structure. After one side of the bracket 2 is in place with the base 1 through the pivot connection structure, the bracket 2 is rotated a certain angle close to one side of the base 1 until the other side of the bracket 2 is clamped on the avoidance position 10 through the first clamping structure, and the bracket 2 is completely fixed to the base 1.

[0031] The print head assembly structure of the present embodiment also includes a substrate 3, and the substrate 3 is connected to the bracket 2 via a second clamping structure. The second clamping structure restricts and fixes the substrate 3 between the paired brackets 2. Before the bracket 2 is installed on the base 1, the substrate 3 and the bracket 2 are first assembled via the second clamping structure. Under the limitation of the second clamping structure, the substrate 3 can be quickly assembled into place with the bracket 2. A positioning hole 11 is provided at the bottom of the base 1, and a positioning column 12 is provided in the positioning hole 11. A spring 13 is sleeved on the positioning column 12, and the spring 13 elastically abuts between the positioning column 12 and the bottom surface of the substrate 3.

[0032] In this embodiment, the print head assembly structure also includes a thermal film 4, which is adapted to the upper part of the substrate 3. A limiting structure is set between the thermal film 4 and the bracket 2. The substrate 3 and the thermal film 4 are completely restricted and fixed between the bracket 2 through the limiting structure. Before the bracket 2 is assembled to the base 1, the assembly steps are to first assemble the substrate 3 to the bracket 2, and then assemble the thermal film 4 to the bracket 2 through the limiting structure. The thermal film 4 is tightly adapted to the substrate 3.

[0033] In this embodiment, more specifically, a cavity 20 is provided on the bracket 2, the pivot connection structure and the first clamping structure are respectively distributed on the front and rear sides of the cavity 20, the second clamping mechanism is arranged in the cavity 20, the limiting structure is located above the cavity 20, and the upper and lower sides formed by the thermal film 4 and the substrate 3 are respectively restricted and fixed between the cavity 20 and the limiting structure.

[0034] In this embodiment, the pivot connection structure includes a positioning axis 14 formed on the base 1, and a waist-shaped groove 21 arranged on one side of the bracket 2 and arranged opposite to the positioning axis 14. When the bracket 2 and the base 1 are plugged together through the waist-shaped groove 21 and the positioning axis 14, there are only axial freedom and rotational freedom along the positioning axis 14 between the bracket 2 and the base 1. The significance of the design of the waist-shaped groove 21 and the positioning axis 14 is to provide pre-positioning between the bracket 2 and the base 1. The assembly steps are to first insert the waist-shaped groove 21 against the positioning axis 14 along the axial direction of the positioning axis 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 axis 14 and the waist-shaped groove 21 are in a rotationally plugged matching relationship, the bracket 2 can be rotated on the base 1 at this time, and can also be moved along the axial direction of the positioning axis 14.

[0035] Example 3 A print head assembly structure of a printer, comprising: The base 1 has symmetrically disposed avoidance spaces 10 at both ends thereof, and the avoidance spaces 10 are through-groove structures.

[0036] The print head assembly structure also includes a bracket 2 arranged in a pair, 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. With the cooperation of the pivot connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, there are only rotational freedom and freedom along the length direction of the base 1 between the bracket 2 and the base 1. Secondly, the bracket 2 can be completely assembled to the base 1 for fixation through the first clamping structure. The front and back matching process of pre-positioning and then tightening and assembling makes the assembly more precise, reduces the assembly error rate compared to the one-time assembly method, and makes the assembly more accurate.

[0037] As mentioned above, when the bracket 2 is assembled on the base 1, the bracket 2 is first aligned with the base 1 through the pivot connection structure. After one side of the bracket 2 is in place with the base 1 through the pivot connection structure, the bracket 2 is rotated a certain angle close to one side of the base 1 until the other side of the bracket 2 is clamped on the avoidance position 10 through the first clamping structure, and the bracket 2 is completely fixed to the base 1.

[0038] The print head assembly structure of the present embodiment also includes a substrate 3, and the substrate 3 is connected to the bracket 2 via a second clamping structure. The second clamping structure restricts and fixes the substrate 3 between the paired brackets 2. Before the bracket 2 is installed on the base 1, the substrate 3 and the bracket 2 are first assembled via the second clamping structure. Under the limitation of the second clamping structure, the substrate 3 can be quickly assembled into place with the bracket 2. A positioning hole 11 is provided at the bottom of the base 1, and a positioning column 12 is provided in the positioning hole 11. A spring 13 is sleeved on the positioning column 12, and the spring 13 elastically abuts between the positioning column 12 and the bottom surface of the substrate 3.

[0039] In this embodiment, the print head assembly structure also includes a thermal film 4, which is adapted to the upper part of the substrate 3. A limiting structure is set between the thermal film 4 and the bracket 2. The substrate 3 and the thermal film 4 are completely restricted and fixed between the bracket 2 through the limiting structure. Before the bracket 2 is assembled to the base 1, the assembly steps are to first assemble the substrate 3 to the bracket 2, and then assemble the thermal film 4 to the bracket 2 through the limiting structure. The thermal film 4 is tightly adapted to the substrate 3.

[0040] In this embodiment, more specifically, a cavity 20 is provided on the bracket 2, the pivot connection structure and the first clamping structure are respectively distributed on the front and rear sides of the cavity 20, the second clamping mechanism is arranged in the cavity 20, the limiting structure is located above the cavity 20, and the upper and lower sides formed by the thermal film 4 and the substrate 3 are respectively restricted and fixed between the cavity 20 and the limiting structure.

[0041] In this embodiment, the pivot connection structure includes a positioning axis 14 formed on the base 1, and a waist-shaped groove 21 arranged on one side of the bracket 2 and arranged opposite to the positioning axis 14. When the bracket 2 and the base 1 are plugged together through the waist-shaped groove 21 and the positioning axis 14, there are only axial freedom and rotational freedom along the positioning axis 14 between the bracket 2 and the base 1. The significance of the design of the waist-shaped groove 21 and the positioning axis 14 is to provide pre-positioning between the bracket 2 and the base 1. The assembly steps are to first insert the waist-shaped groove 21 against the positioning axis 14 along the axial direction of the positioning axis 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 axis 14 and the waist-shaped groove 21 are in a rotationally plugged matching relationship, the bracket 2 can be rotated on the base 1 at this time, and can also be moved along the axial direction of the positioning axis 14.

[0042] In the present embodiment, further, after the waist-shaped groove 21 and the positioning shaft 14 are plugged into each other, in order to prevent the bracket 2 from being dislocated when moving toward the two ends of the base 1, convex bumps 210 are 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 preventing the bracket 2 from being dislocated during assembly and adjustment, and ensuring that the assembly can proceed normally.

[0043] Example 4 A print head assembly structure of a printer, comprising: The base 1 has symmetrically disposed avoidance spaces 10 at both ends thereof, and the avoidance spaces 10 are through-groove structures.

[0044] The print head assembly structure also includes a bracket 2 arranged in a pair, 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. With the cooperation of the pivot connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, there are only rotational freedom and freedom along the length direction of the base 1 between the bracket 2 and the base 1. Secondly, the bracket 2 can be completely assembled to the base 1 for fixation through the first clamping structure. The front and back matching process of pre-positioning and then tightening and assembling makes the assembly more precise, reduces the assembly error rate compared to the one-time assembly method, and makes the assembly more accurate.

[0045] As mentioned above, when the bracket 2 is assembled on the base 1, the bracket 2 is first aligned with the base 1 through the pivot connection structure. After one side of the bracket 2 is in place with the base 1 through the pivot connection structure, the bracket 2 is rotated a certain angle close to one side of the base 1 until the other side of the bracket 2 is clamped on the avoidance position 10 through the first clamping structure, and the bracket 2 is completely fixed to the base 1.

[0046] The print head assembly structure of the present embodiment also includes a substrate 3, and the substrate 3 is connected to the bracket 2 via a second clamping structure. The second clamping structure restricts and fixes the substrate 3 between the paired brackets 2. Before the bracket 2 is installed on the base 1, the substrate 3 and the bracket 2 are first assembled via the second clamping structure. Under the limitation of the second clamping structure, the substrate 3 can be quickly assembled into place with the bracket 2. A positioning hole 11 is provided at the bottom of the base 1, and a positioning column 12 is provided in the positioning hole 11. A spring 13 is sleeved on the positioning column 12, and the spring 13 elastically abuts between the positioning column 12 and the bottom surface of the substrate 3.

[0047] In this embodiment, the print head assembly structure also includes a thermal film 4, which is adapted to the upper part of the substrate 3. A limiting structure is set between the thermal film 4 and the bracket 2. The substrate 3 and the thermal film 4 are completely restricted and fixed between the bracket 2 through the limiting structure. Before the bracket 2 is assembled to the base 1, the assembly steps are to first assemble the substrate 3 to the bracket 2, and then assemble the thermal film 4 to the bracket 2 through the limiting structure. The thermal film 4 is tightly adapted to the substrate 3.

[0048] In this embodiment, more specifically, a cavity 20 is provided on the bracket 2, the pivot connection structure and the first clamping structure are respectively distributed on the front and rear sides of the cavity 20, the second clamping mechanism is arranged in the cavity 20, the limiting structure is located above the cavity 20, and the upper and lower sides formed by the thermal film 4 and the substrate 3 are respectively restricted and fixed between the cavity 20 and the limiting structure.

[0049] In this embodiment, the pivot connection structure includes a positioning axis 14 formed on the base 1, and a waist-shaped groove 21 arranged on one side of the bracket 2 and arranged opposite to the positioning axis 14. When the bracket 2 and the base 1 are plugged together through the waist-shaped groove 21 and the positioning axis 14, there are only axial freedom and rotational freedom along the positioning axis 14 between the bracket 2 and the base 1. The significance of the design of the waist-shaped groove 21 and the positioning axis 14 is to provide pre-positioning between the bracket 2 and the base 1. The assembly steps are to first insert the waist-shaped groove 21 against the positioning axis 14 along the axial direction of the positioning axis 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 axis 14 and the waist-shaped groove 21 are in a rotationally plugged matching relationship, the bracket 2 can be rotated on the base 1 at this time, and can also be moved along the axial direction of the positioning axis 14.

[0050] In the present embodiment, further, after the waist-shaped groove 21 and the positioning shaft 14 are plugged into each other, in order to prevent the bracket 2 from being dislocated when moving toward the two ends of the base 1, convex bumps 210 are 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 preventing the bracket 2 from being dislocated during assembly and adjustment, and ensuring that the assembly can proceed normally.

[0051] In this embodiment, the first clamping structure includes a bending portion 22 formed at the lower part of the other side of the bracket 2 away from the waist-shaped groove 21, and the bending portion 22 can pass through the avoidance position 10. A first rib position 220 is formed on one side of the bending portion 22, and the first rib position 220 is clamped and adapted to the bottom of the avoidance position 10. When the bracket 2 and the base 1 are positioned in place through the pivot 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 avoidance position 10.

[0052] In this embodiment, the second clamping structure includes a second rib 23 formed on a side wall of the cavity 20, and a groove 30 opened on one side of the substrate 3. The second rib 23 and the groove 30 are clamped and adapted to each other, so that the bracket 2 is installed on both ends of the substrate 3. The two ends of the substrate 3 are accommodated in the cavity 20. When the base and the bracket 2 are assembled, the second rib 23 is aligned with the groove 30 and the bracket 2 is inserted into the two ends of the substrate 3.

[0053] Example 5 A print head assembly structure of a printer, comprising: The base 1 has symmetrically disposed avoidance spaces 10 at both ends thereof, and the avoidance spaces 10 are through-groove structures.

[0054] The print head assembly structure also includes a bracket 2 arranged in a pair, 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. With the cooperation of the pivot connection structure, the bracket 2 is first inserted into the base 1 for pre-positioning. At this time, there are only rotational freedom and freedom along the length direction of the base 1 between the bracket 2 and the base 1. Secondly, the bracket 2 can be completely assembled to the base 1 for fixation through the first clamping structure. The front and back matching process of pre-positioning and then tightening and assembling makes the assembly more precise, reduces the assembly error rate compared to the one-time assembly method, and makes the assembly more accurate.

[0055] As mentioned above, when the bracket 2 is assembled on the base 1, the bracket 2 is first aligned with the base 1 through the pivot connection structure. After one side of the bracket 2 is in place with the base 1 through the pivot connection structure, the bracket 2 is rotated a certain angle close to one side of the base 1 until the other side of the bracket 2 is clamped on the avoidance position 10 through the first clamping structure, and the bracket 2 is completely fixed to the base 1.

[0056] The print head assembly structure of this embodiment also includes a substrate 3, and the substrate 3 is connected to the bracket 2 via a second clamping structure. The second clamping structure restricts and fixes the substrate 3 between the paired brackets 2. Before the bracket 2 is installed on the base 1, the substrate 3 and the bracket 2 are first assembled via the second clamping structure. Under the limitation of the second clamping structure, the substrate 3 can be quickly assembled into place with the bracket 2.

[0057] In this embodiment, the print head assembly structure also includes a thermal film 4, which is adapted to the upper part of the substrate 3. A limiting structure is set between the thermal film 4 and the bracket 2, and the substrate 3 and the thermal film 4 are completely restricted and fixed between the bracket 2 through the limiting structure. Before the bracket 2 is assembled to the base 1, the assembly steps are to first assemble the substrate 3 to the bracket 2, and then assemble the thermal film 4 to the bracket 2 through the limiting structure. The thermal film 4 is tightly adapted to the substrate 3, and a positioning hole 11 is opened at the bottom of the base 1, and a positioning column 12 is arranged in the positioning hole 11. A spring 13 is sleeved on the positioning column 12, and the spring 13 elastically abuts between the positioning column 12 and the bottom surface of the substrate 3.

[0058] In this embodiment, more specifically, a cavity 20 is provided on the bracket 2, the pivot connection structure and the first clamping structure are respectively distributed on the front and rear sides of the cavity 20, the second clamping mechanism is arranged in the cavity 20, the limiting structure is located above the cavity 20, and the upper and lower sides formed by the thermal film 4 and the substrate 3 are respectively restricted and fixed between the cavity 20 and the limiting structure.

[0059] In this embodiment, the pivot connection structure includes a positioning axis 14 formed on the base 1, and a waist-shaped groove 21 arranged on one side of the bracket 2 and arranged opposite to the positioning axis 14. When the bracket 2 and the base 1 are plugged together through the waist-shaped groove 21 and the positioning axis 14, there are only axial freedom and rotational freedom along the positioning axis 14 between the bracket 2 and the base 1. The significance of the design of the waist-shaped groove 21 and the positioning axis 14 is to provide pre-positioning between the bracket 2 and the base 1. The assembly steps are to first insert the waist-shaped groove 21 against the positioning axis 14 along the axial direction of the positioning axis 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 axis 14 and the waist-shaped groove 21 are in a rotationally plugged matching relationship, the bracket 2 can be rotated on the base 1 at this time, and can also be moved along the axial direction of the positioning axis 14.

[0060] In the present embodiment, further, after the waist-shaped groove 21 and the positioning shaft 14 are plugged into each other, in order to prevent the bracket 2 from being dislocated when moving toward the two ends of the base 1, convex bumps 210 are 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 preventing the bracket 2 from being dislocated during assembly and adjustment, and ensuring that the assembly can proceed normally.

[0061] In this embodiment, the first clamping structure includes a bending portion 22 formed at the lower part of the other side of the bracket 2 away from the waist-shaped groove 21, and the bending portion 22 can pass through the avoidance position 10. A first rib position 220 is formed on one side of the bending portion 22, and the first rib position 220 is clamped and adapted to the bottom of the avoidance position 10. When the bracket 2 and the base 1 are positioned in place through the pivot 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 avoidance position 10.

[0062] In this embodiment, the second clamping structure includes a second rib 23 formed on a side wall of the cavity 20, and a groove 30 opened on one side of the substrate 3. The second rib 23 and the groove 30 are clamped and adapted to each other, so that the bracket 2 is installed on both ends of the substrate 3. The two ends of the substrate 3 are accommodated in the cavity 20. When the base and the bracket 2 are assembled, the second rib 23 is aligned with the groove 30 and the bracket 2 is inserted into the two ends of the substrate 3.

[0063] In this embodiment, further, the limiting structure includes a limiting rib 24 formed on the bracket 2, and the limiting rib 24 is located above the cavity 20. When the substrate 3 and the thermal sensitive film 4 are connected to the bracket 2, the bottom of the limiting rib 24 abuts against the upper surface of the thermal sensitive film 4, so that the substrate 3 and the thermal sensitive film 4 are fixed on the bracket 2, and further, the bracket 2 is provided with a guide channel 25 on the front and rear sides between the cavity 20 and the limiting block 15. The thermal sensitive film 4 can pass through the guide channel 25 to pass through the bracket 2, so as to ensure that the thermal sensitive film 4 is smoothly and correctly pushed onto the substrate 3, and then the thermal sensitive film 4 and the substrate 3 are tightly pressed against the bracket 2 through the limiting rib 24 to complete the correct assembly. Finally, the bracket 2 and the base 1 are pre-positioned by the pivot connection structure. After the bending portion 22 on the first clamping structure passes through the avoidance position 10, the first rib position 220 is clamped on the bottom surface of the avoidance position 10 to complete the assembly.

[0064] Furthermore, limit blocks 15 are provided on both sides of the avoidance position 10 of the base 1 , and the inner walls of the limit blocks 15 are in contact with the outer side surfaces of the bracket 2 , thereby limiting the bracket 2 from being separated from the base 1 .

[0065] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A print head assembly structure of a printer, characterized in that: include: The base has symmetrically opened escape spaces at both ends; The brackets are arranged in pairs, and a pivot connection structure and a first clamping structure are arranged between the brackets and the base. When the brackets are assembled on the base, the brackets are first aligned with the base through the pivot connection structure. When one side of the bracket is arranged in place with the base through the pivot connection structure, the bracket is rotated to a certain angle close to one side of the base until the other side of the bracket is clamped in the avoidance position through the first clamping structure, and the bracket is completely fixed to the base; A base plate connected to the bracket via a second clamping structure, wherein the base plate is restricted and fixed between the paired brackets by the second clamping structure; The thermal sheet is adapted to be mounted on the upper portion of the substrate. A limiting structure is provided between the thermal sheet and the bracket, and the substrate and the thermal sheet are completely restricted and fixed between the brackets by the limiting structure.

2. The print head assembly structure of a printer according to claim 1, characterized in that: 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 mechanism 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 restricted and fixed between the cavity and the limiting structure.

3. The print head assembly structure of a printer according to claim 2, characterized in that: The pivot connection structure includes a positioning axis formed on the base, and a waist-shaped groove arranged on one side of the bracket and arranged opposite to the positioning axis. When the bracket and the base are plugged into each other through the waist-shaped groove and the positioning axis, there are only axial freedom and rotational freedom along the positioning axis between the bracket and the base.

4. The print head assembly structure of a printer according to claim 3, 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 be separated from the convex hulls.

5. The print head assembly structure of a printer according to claim 4, characterized in that: The first clamping structure includes a bending portion formed at the lower part of the other side of the bracket away from the waist-shaped groove, and the bending portion can pass through the avoidance position. A first rib is formed on one side of the bending portion, and 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.

6. The print head assembly structure of a printer according to claim 5, characterized in that: The second clamping structure includes a second rib formed on a side wall of the cavity and a groove opened on one side of the substrate. The second rib is clamped and adapted with the groove so that the bracket is installed on both ends of the substrate, and the two ends of the substrate are accommodated in the cavity.

7. A print head assembly structure for a printer according to claim 6, characterized in that: The limiting structure includes limiting ribs formed on the bracket, the limiting ribs are located above the cavity, and when the substrate and the thermal film are connected to the bracket, the bottom of the limiting ribs abuts against the upper surface of the thermal film, so that the substrate and the thermal film are fixed on the bracket.

8. The print head assembly structure of a printer according to claim 7, characterized in that: A limiting block is provided on the base, and the inner wall of the limiting block is in contact with the outer side surface of the bracket.

9. The print head assembly structure of a printer according to claim 8, characterized in that: The bracket is provided with guide channels at the front and rear sides between the cavity and the limiting block, and the thermal sheet can pass through the guide channels to penetrate into the bracket.

10. 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 column is provided in the positioning hole, a spring is sleeved on the positioning column, and the spring elastically abuts between the positioning column and the bottom surface of the base plate.

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