Printhead mounting assembly, printer core and printer

Abstract

The utility model provides a kind of printhead mounting assembly, printer core and printer.Printer head mounting assembly includes support, printhead assembly and elastic piece, support is used to connect with the body of printer, support includes bottom and side, in first direction, two sides are connected in the opposite sides of bottom;Side is equipped with connecting shaft, bottom is equipped with elastic piece connecting structure and first buckling structure;The extension side of heat dissipation plate is equipped with clasp, the extension middle part of heat dissipation plate is equipped with second buckling structure;Clasp hooks connecting shaft, first buckling structure and second buckling structure buckle, elastic piece is connected between heat dissipation plate and elastic piece connecting structure.Printer core includes printhead mounting assembly and roll assembly, printer includes above-mentioned printer core.The utility model realizes that printhead assembly is directly connected with support, keeps the action requirement of printhead assembly and guarantees that connection is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, specifically to a printhead mounting assembly, a print core, and a printer. Background Technology

[0002] The printhead of an existing thermal printer includes a printhead assembly, a rotating frame, a support, springs, and a roller assembly. The rotating frame is rotatably mounted on the support about a first axis. The support has a first locking position, and the rotating frame has a second locking position. When the rotating frame is rotated, the first locking position aligns with the second locking position. The mating section of the roller assembly is installed in the first and second locking positions. The printhead assembly includes a heat sink and a printhead attached to the heat sink. The printhead assembly is rotatably mounted on the rotating frame about a second axis, and multiple springs abut against the rotating frame and the printhead assembly. The restoring force of the springs causes the printhead assembly to rotate and return to its original position. The printhead is bonded to the printhead assembly.

[0003] The problem with existing thermal printers of this type is that the printhead is relatively thick. Therefore, it is desirable to eliminate the rotating frame to reduce the thickness and instead mount the printhead assembly directly onto the frame.

[0004] However, how to facilitate the assembly of the printhead assembly and the support while maintaining the mobility of the printhead assembly has become a technical challenge. Utility Model Content

[0005] The primary objective of this invention is to provide a printhead mounting assembly that enables direct connection between the printhead assembly and the support.

[0006] The second objective of this invention is to provide a printer core that enables direct connection between the printhead assembly and the support.

[0007] The third objective of this invention is to provide a printer that facilitates miniaturization.

[0008] The first objective of this utility model is to provide a printhead mounting assembly including a bracket, a printhead assembly, and an elastic element. The bracket includes a bottom and sides. In a first direction, the two sides are connected to opposite sides of the bottom. Each side is provided with a connecting shaft, and the bottom is provided with a first fastening structure. The extended side of the printhead assembly is provided with a hook, and the extended middle part of the printhead assembly is provided with a second fastening structure. The hook hooks onto the connecting shaft, and the first and second fastening structures are fastened together. The elastic element abuts against the printhead assembly and the bottom.

[0009] As can be seen from the above solution, under the premise of restricting the movement of the printhead assembly in the first direction on both sides of the bracket, the hooks engage the connecting shaft and fasten it with a snap-fit ​​structure, so that the installation process of the printhead assembly does not require movement in the first direction. Installation can be completed by moving within a plane perpendicular to the first direction. After the elastic element is installed, its restoring force can keep the bracket and the printhead assembly in a stable snap-fit ​​state. With this setting, while eliminating the original rotating frame and achieving thickness reduction, the printhead assembly is directly installed on the bracket and the original movement requirements of the printhead assembly are maintained. In particular, the method of extending the hooks on both sides to engage the connecting shaft and extending the middle snap-fit ​​allows for coordination at all points in the extension direction, ensuring a stable and reliable connection between the bracket and the printhead assembly.

[0010] A further design is that one of the first and second fastening structures is a fastening position, and the other of the first and second fastening structures is a limiting buckle; the entry direction of the fastening position forms an angle with the entry direction of the hook position, and under the action of the restoring force of the elastic element, the connecting shaft tends to move along the entry direction of the hook position.

[0011] A further proposed solution is that the hook and the connecting shaft are mutually restrained along the second direction, and the first and second fastening structures are mutually restrained along the third direction, with the second direction and the third direction being perpendicular to each other.

[0012] As can be seen from the above, the different entry directions of the snap-fit ​​position and the hook position (exit direction) cause the two positions to mutually hinder each other's disengagement, effectively preventing them from disengaging. Furthermore, under the action of the spring's restoring force, the hook remains engaged with the connecting shaft, thus maintaining a stable connection between the hook-fit position and the snap-fit ​​position. In particular, when the direction in which the hook and the connecting shaft mutually limit each other is perpendicular to the direction in which the first and second snap-fit ​​structures mutually limit each other, it achieves a better mutual restriction and mutual hindering effect, ensuring assembly reliability.

[0013] Another further solution is that the first fastening structure is set as a fastening position, which is a through hole on the bottom wall; the second fastening structure is set as a limiting buckle, which includes a buckle protrusion that inserts into the through hole; the printhead assembly can be connected to the shaft for rotation and the through hole restricts the rotation range of the buckle protrusion, and the through hole restricts the buckle protrusion in the third direction and the first direction.

[0014] As can be seen from the above, under this setting, during installation or printing, the printhead assembly will rotate around the connecting shaft and float to a certain extent when subjected to force, thus achieving buffering. Moreover, because the rotation amplitude and movement in all directions are limited, it can be ensured that the buffering action will not cause a disengagement problem, ensuring that the printhead works stably and effectively.

[0015] Another further embodiment is that the printhead assembly includes a base plate portion and a side plate portion, with the side plate portion bent and connected to the edge of the base plate portion; the base plate portion is used to connect with the printhead; and hooks and / or second fastening structures are provided on a corresponding side plate portion.

[0016] As can be seen from the above, this configuration makes it easy to form the printhead assembly from a single piece of sheet material.

[0017] The second objective of this utility model is to provide a printer core including a printhead mounting assembly and a roller assembly. The roller assembly is detachably connected to the printhead mounting assembly, and each side of the roller assembly has a mating section. The printhead mounting assembly adopts the above-mentioned printhead mounting assembly. A first locking position is also provided on the side. The roller assembly is opposite to the printhead assembly, and each mating section is located in a corresponding first locking position.

[0018] As can be seen from the above solution, this setup eliminates the original rotating frame, allowing the printhead assembly to be rotatably mounted directly onto the bracket, effectively reducing the overall thickness of the print core and facilitating the miniaturization of the printer.

[0019] A further embodiment includes a cover-opening actuator and a reset component in the printhead mounting assembly. The cover-opening actuator has a shaft hole, an operating part, and a blocking part, which are located at different positions on the outer periphery of the shaft hole. The shaft hole mates with a connecting shaft, and the reset component is connected between the cover-opening actuator and the bracket. The force of the reset component keeps the cover-opening actuator in the locked position, with each mating segment located in a corresponding first locking position. The blocking part prevents the mating segment from exiting the first locking position. When an external force is applied to the operating part, the cover-opening actuator can be forced to rotate to the unlocked position. When the cover-opening actuator is in the unlocked position, the blocking part releases its obstruction of the mating segment.

[0020] As can be seen from the above, with this configuration, the roller assembly acts as a latch for the cover. Without external force, the cover-opening mechanism locks the mating section of the roller assembly in the first locking position, naturally keeping the cover in the closed position. Operating the cover-opening mechanism releases the lock on the roller assembly, allowing it to disengage from the first locking position, at which point the cover can be opened. This configuration reduces the number of printer parts and space requirements, further facilitating the miniaturization of the printer body.

[0021] A further proposed solution is to position the cover opening mechanism between the printhead assembly and the side in the first direction.

[0022] This configuration allows for the reservation of space on the outer side for the installation of gear sets and detection units, and the arrangement of the components in the pre-assembled body is more reasonable and compact, further facilitating the miniaturization of the machine body.

[0023] A further proposed solution is that the printer core also includes a motor and a gear set, with the motor connected to the motor connection structure and the gear set connected to the gear connection structure.

[0024] As can be seen from the above, in this configuration, the printer cartridge also integrates a motor and gear set.

[0025] The printer provided by the third objective of this utility model includes the aforementioned printer core. Attached Figure Description

[0026] Figure 1 This is a structural diagram of the first state of the printer core embodiment of this utility model.

[0027] Figure 2 This is a structural diagram of the second state of an embodiment of the printer core of this utility model.

[0028] Figure 3 This is an exploded view of the structure of an embodiment of the printer core of this utility model.

[0029] Figure 4 This is a partial view of the support frame of an embodiment of the printer core of this utility model.

[0030] Figure 5 This is a structural diagram of the heat sink plate in an embodiment of the printer core of this utility model.

[0031] Figure 6 This is a partial exploded view of the heat sink and bracket in an embodiment of the printer core of this utility model.

[0032] Figure 7 This is a structural diagram of the cover opening operating component and the reset component in an embodiment of the printer core of this utility model.

[0033] Figure 8 This is a partial view of the left-side cover opening mechanism in an embodiment of the printer core of this utility model.

[0034] Figure 9 This is a partial view of the right-side cover opening mechanism in an embodiment of the printer core of this utility model. Detailed Implementation

[0035] Printhead mounting assembly, printer core, and printer embodiment See Figure 1 and Figure 2 The thermal printer in this embodiment includes a printer core, which can be pre-installed as a universal pre-installed body and then installed into different models of printers to form different printers.

[0036] The printer cartridge includes a pre-mount body 91 and a roller assembly 92, the roller assembly 92 being detachably mounted to the pre-mount body 91. The printer includes a body and a cover, the cover being movably connected to the body in a closed position and an open position, for example, the cover being configured as a flip cover. When the printer cartridge is installed into the printer, the pre-mount body 91 is mounted to the body and the roller assembly 92 is mounted to the cover.

[0037] See Figure 3 and Figure 9 The pre-assembled body 91 includes a bracket 1, a heat sink 2, a print head 3, a cover opening actuator 4, an elastic element 51, a reset element 52, a detection unit 6, a gear set 7, and a motor 8. The heat sink 2 and the print head 3 bonded to the heat sink 2 constitute the print head assembly of this utility model; the print head assembly, bracket 1, and elastic element 51 constitute the print head mounting assembly of this utility model. The print head 3 includes an FPC flexible circuit board 39 pre-connected to it. The elastic element 51 is a pressure spring, the reset element 52 is a torsion spring, and the detection unit 6 is a contact-type detection switch.

[0038] See Figure 3 and Figure 4 The bracket 1 includes a bottom 11 and two sides 12. The bottom 11 extends along a first direction as shown by the x-axis in the figure. In the first direction, the two sides 12 are respectively connected to opposite sides of the bottom 11. The first direction is the width direction of the printer core and also the paper width direction of the paper to be printed by the printer, which is composed of the printer core.

[0039] The bottom 11 includes a bottom wall 111, and the side 12 includes a side wall 121. The bottom wall 111 is a flat wall panel extending along the x-axis direction, while the side wall 121 is a flat wall panel extending along a plane perpendicular to the x-axis direction. The bottom wall 111 and the side wall 121 are connected by a right-angle bend.

[0040] The bottom 11 is provided with an elastic element connection structure 114. In this embodiment, the elastic element connection structure 114 is a circular positioning post protruding from the upper surface of the bottom wall 111, and the pressure spring can be fitted onto the circular positioning post. In this embodiment, six elastic element connection structures 114 are distributed on the bottom 11 along the first direction.

[0041] The bottom 11 also includes a back wall 112, which is bent at a right angle to the bottom wall 111 and is perpendicular to the side wall 121. A first fastening structure 1120 is provided on the back wall 112, which is a fastening position, specifically a square through hole penetrating the back wall 112. Additionally, the bottom 11 also includes an extension wall 115, on which a connecting hole 1150 is provided. In this embodiment, four first fastening structures 1120 are distributed along a first direction on the back wall 112.

[0042] Next, we will describe side portion 12. First, side portion 12 includes a connecting shaft 122 extending from the inside of side wall 121 along the negative x-axis. Here, the inside of side portion 12 refers to the side of side portion 12 opposite to the other side portion 12 in the first direction. Further, the connecting shaft 122 is located opposite the bottom wall 111 in a third direction, as shown by the z-axis in the figure. The third direction is the height direction of the printing core.

[0043] The side portion 12 also includes a first retaining position 120. The first retaining position 120 is a notch provided on the side wall 121. The first retaining position 120 is located relatively far from the bottom wall 111 along the z-axis direction shown in the figure, and the first retaining position 120 opens obliquely towards the front and upper part of the printer core. The first retaining position 120 has an arc-shaped inner contour surface, which allows the first retaining position 120 to fit more closely with the outer contour of the cylindrical structure located within it.

[0044] Additionally, side portion 12 also includes a motor connection structure disposed on side wall 121, which includes a motor shaft hole 128 and a mounting hole 129. Side wall 121 extends along a second direction as shown by the y-axis in the figure, which is the front-to-back direction of the printer core. In this second direction, the motor connection structure is disposed on side wall 121 at a position away from and avoiding bottom wall 111. After motor 8 is positioned inside left side portion 12, bolt 63 passes through mounting hole 129 and threadedly engages with the housing of motor 8, thereby fixing motor 8 to bracket 1; the output shaft of motor 8 passes through motor shaft hole 128 and extends to the outside of left side portion 12.

[0045] See Figure 3 , Figure 4 and Figure 8 In the first direction, a gear connection structure 127 is also provided on the outer side of the left side 12. The gear connection structure 127 mainly includes a gear shaft. The gear set 7 includes three gears. The gear set 7 is installed on the outer side of the left side 12 through the gear shaft and the output shaft of the motor 8, and each gear meshes according to a preset transmission relationship.

[0046] See Figure 9 In the first direction, a detection unit connection structure is provided on the outer side of the right side 12. This connection structure mainly includes mounting through holes 1262 penetrating both sides of the thickness of the sidewall 121. Additionally, a positioning plate 1261 is provided on the right sidewall 121, extending outwards from the front edge of the sidewall 121 at a right angle. Bolts pass through the mounting through holes 1262 and engage with the housing of the detection unit 6 via threads to fix the detection unit 6 to the outer side of the right side 12. The positioning plate 1261 restricts the movement and rotation of the detection unit 6. The detection unit 6 has a movable contact end 69, and it emits different detection signals depending on the location of the contact end 69.

[0047] See Figure 3 and Figure 5 The heat sink 2 includes a base plate portion 21 and side plate portions, with multiple side plate portions connected to the edge of the base plate portion 21 at right angles. The print head 3 is mounted on the base plate portion 21.

[0048] In the first direction, the heat sink 2 has side plates on both opposite sides, each side plate having a hook 23 and a corresponding hook position 230. Figure 5 As shown by the arrow, the structure that needs to cooperate with the hook 23 can first move along the second direction and then move in the third direction to enter the hook position 230.

[0049] In the second direction, the front side of the heat sink 2 is provided with the aforementioned side plate portion, on which a second fastening structure 22 is provided. The second fastening structure 22 includes a snap-fit ​​protrusion 222 that is bent and extends outward in the second direction from its end. Four second fastening structures 22 are arranged along the middle extension of the heat sink 2 in the first direction. The middle extension in this invention refers to the remaining portion excluding the two sides of the extension. Additionally, in the second direction, the rear side of the heat sink 2 is provided with the aforementioned side plate portion, which is a complete rear side plate 24. The rear side plate 24 mainly provides the heat sink 2 with good resistance to bending deformation, while also making the fastening of the printhead assembly and the support more stable.

[0050] Combined Figure 6 After the elastic element 51 is connected to the elastic element connecting structure 114, the heat sink 2 moves forward in the second direction, and the front latch (second fastening structure 22) is inserted into the through hole (first fastening structure 1120). At the same time, the hook position 230 reaches directly below the connecting shaft 122. Then the heat sink 2 moves upward in the third direction, and the connecting shaft 122 enters the hook position 230. At this time, the latch 23 hooks the connecting shaft 122.

[0051] At this time, the hook 23 and the connecting shaft 122 are mutually restrained along the second direction, and the through hole (first fastening structure 1120) restricts the latch protrusion (second fastening structure 22) from the third direction and the first direction. The hook 23 restricts the connecting shaft 122 from the second direction. At this time, the movement freedom of the heat sink 2 is restricted. The heat sink 2 rotates about the connecting shaft 122. Since the through hole is large, the latch protrusion has a certain range of motion within the through hole. Under this setting, the through hole restricts the rotation range of the latch protrusion.

[0052] At this time, the elastic member 51 is connected between the base plate portion 21 and the elastic member connection structure 114 in a third direction. When the heat sink 2 rotates forward, the elastic member 51 is compressed, and the heat sink 2 can be reversed and reset under the restoring force of the elastic member 51. Furthermore, under the action of the restoring force of the elastic member 51, the connecting shaft 122 tends to move along the entry direction of the hook position 230 and is better held in the hook position 230.

[0053] In this configuration, while eliminating the original rotating frame to reduce thickness, the printhead assembly is directly mounted on the bracket 1, maintaining the original rotation and floating motion requirements of the printhead assembly. Specifically, in the first direction, the extended side hooks 23 engage with the connecting shaft 122, and the extended central protrusion engages with the through hole, ensuring that the heat sink 2 of the printhead assembly and the bracket 1 cooperate at various points in the first direction, resulting in a stable and reliable connection between the bracket 1 and the printhead assembly.

[0054] See Figure 7 In this embodiment, the opening mechanism 4 is manufactured entirely from a single sheet metal.

[0055] The opening mechanism 4 includes a side plate 49, which occupies the largest area. A shaft hole 40 is provided on the side plate 49, extending through both sides of its thickness. The shaft hole 40 serves as the rotation axis of the opening mechanism 4. The opening mechanism 4 also has a second locking position 41 and an operating part 42 respectively provided at different positions on the outer periphery of the shaft hole 40.

[0056] The second slot 41 is a notch on the side plate 49. A blocking part 411 is provided on the entrance side of the second slot 41. Specifically, the blocking part 411 is a slightly protruding part that protrudes in the direction that narrows the entrance of the second slot 41.

[0057] The operating part 42 is a small plate that is bent at a right angle to the side plate 49. The operating part 42 can be a part directly pressed by the user's fingers. The operating part 42 can also serve as a connecting part for direct connection with the finger-pressing component; for example, if a more suitable position for the operating point needs to be located on the exterior of the device, a component can be connected between the operating part 42 and this suitable position, and the operating part 42 is operated when the user presses the cover component. Therefore, the operating part 42 should not be limited to a part that the user directly contacts.

[0058] The side plate 49 is also provided with a hook hole 43 that runs through the two sides of its own thickness. In this embodiment, the hook hole 43 is a square hole, which is located in the circumferential position of the shaft hole 40 and between the second locking position 41 and the operating part 42.

[0059] In addition, to facilitate the distinction between the left and right opening actuators 4, “L” or “R” is engraved on the inner and / or outer surfaces of the side plate 49 for differentiation.

[0060] See also Figure 7 The reset member 52 is a torsion spring, which includes a winding portion 523, a first spring arm 521 and a second spring arm 522. Both the first spring arm 521 and the second spring arm 522 extend from the winding portion 523, and a hook 5211 is provided at the end of the first spring arm 521.

[0061] Combined Figure 8 The connecting shaft 122 passes through the shaft hole 40 to mount the cover opening actuator 4 to the inside of the side portion 12 with the connecting shaft 40 as the rotation axis; then, the winding portion 523 is fitted onto the connecting shaft 122. At this time, the side portion 12, the cover opening actuator 4, and the winding portion 523 are arranged sequentially along the first direction.

[0062] The second spring arm 522 abuts against the bottom wall 111, and the second spring arm 521 extends upward, with the hook 5211 passing through the hook hole 43 to hook the side plate 49. The hook 5211 and the hook hole 43 are positioned to avoid the side wall 12, so that the hook 5211 will not collide with the side wall 12 during the rotation of the cover opening actuator 4 within the preset rotation range.

[0063] Under the restoring force of the reset member 52, the cover opening actuator 4 remains in the position as described above. Figure 8 In the aforementioned locked position, although the first locking position 120 and the second locking position 41 are connected along the first direction, the blocking part 411 blocks part of the entrance of the first locking position on the projection of the first direction.

[0064] In this state, the cylindrical structure can pass through the first locking position 120 and the second locking position 41 along the first direction, but the cylindrical structure cannot exit the first locking position 120 along a plane perpendicular to the first direction.

[0065] Let's look again. Figure 3 The roller assembly 92 includes a roller body 921, two mating sections 922, and a driven gear 923. The mating sections 922 are sleeves, and the two mating sections 922 are rotatably fitted onto the two axial ends of the roller body 921. The driven gear 923 is installed at one axial end of the roller body 921. The outer circumferential surface of the mating section 922 is a cylindrical surface.

[0066] Combined Figure 8 and Figure 9 The roller assembly 92 is installed in a position opposite to the print head 3. The two mating sections 922 on both sides of the roller assembly 92 are located in the corresponding first locking position 120 and second locking position 41, and cannot disengage from their current position due to the obstruction of the blocking part 411. Furthermore, the mating section 922 on the right side pushes the contact end 69 of the detection unit 6 to the detection position.

[0067] Since the roller body 921 can rotate relative to the two mating sections 922, the forces exerted by the first locking position 120 and the second locking position 41 on the mating sections 922 do not affect the rotation of the roller body 921. Additionally, the output gear in the gear set 7 meshes with the driven gear 923.

[0068] See Figure 1 and Figure 2In this invention, the printer core, except for the roller assembly 92, comprises a pre-assembled body 91. The design of the pre-assembled body 91 eliminates the need for components such as the print head 3, heat sink 2, motor 8, gear set 7, and cover opening actuator 4 to be mounted on the printer body's casing. Different printer models can use the same printer core. Therefore, the bracket, as the foundation of the printer core, facilitates the construction of a highly versatile printer core, reducing printer production costs. More importantly, reducing the number of rotating frames effectively decreases the thickness of the printer core, contributing to the miniaturization of the printer.

[0069] Pre-assembled unit 91 is mainly connected to the printer body via bracket 1 using bolts, see [link / reference]. Figure 3 To this end, the extension wall 115 of the support 1 has a connecting hole 1150 for bolts to pass through. Mainly, the extension wall 115 is located in a position not obstructed by the print head 3 and the roller assembly 92, which facilitates bolting operations.

[0070] See Figure 8 and Figure 9 Furthermore, in the printer core of this utility model, the roller assembly 92 serves as a latch for the printer cover. Without external force, the cover-opening actuator 4 locks the mating section 922 of the roller assembly 92 in the first locking position 120, naturally keeping the cover in the closed position. When the user operates the cover-opening actuator 4, after the actuator 4 rotates to the unlocked position, the blocking part 411 moves away from the entrance of the first locking position 120 in the projection of the first direction, thus releasing the obstruction of the entrance. At this time, the roller assembly 92 can move along a plane perpendicular to the first direction, and the roller assembly 92 is in a state where it can disengage from the first locking position, allowing the cover to be opened. With this design, there is no need to set up a complex cover-opening button linkage structure inside the printer body, reducing the space occupied by the machine body, facilitating miniaturization, and reducing the assembly difficulty of the machine body.

[0071] Furthermore, in the first direction, a gap is formed between the heat sink 2 and the side portion 12, and the cover opening actuator 4 and the reset component 52 are disposed in the gap. This arrangement allows for the reservation of space on the outer side of the side portion 12 to accommodate the gear set 7 and the detection unit 6, making the arrangement of the components of the pre-assembled body 91 more reasonable and compact, further facilitating the miniaturization of the machine body.

[0072] Finally, it should be emphasized that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A printhead mounting assembly, including a bracket, a printhead assembly, and an elastic element, said bracket including a bottom and sides, wherein, in a first direction, two said sides are connected to opposite sides of the bottom; Its features are: Each side is provided with a connecting shaft, and the bottom is provided with a first fastening structure; The extended side of the printhead assembly is provided with a hook, and the extended middle part of the printhead assembly is provided with a second fastening structure; The hook engages with the connecting shaft, the first and second fastening structures engage, and the elastic element abuts between the printhead assembly and the bottom.

2. The printhead mounting assembly according to claim 1, characterized in that: One of the first and second fastening structures is a fastening position, and the other of the first and second fastening structures is a limiting buckle; The entry direction of the fastening position forms an angle with the entry direction of the hook position of the latch. Under the restoring force of the elastic element, the connecting shaft tends to move along the entry direction of the hook position.

3. The printhead mounting assembly according to claim 2, characterized in that: The hook and the connecting shaft are mutually limited along the second direction, the first fastening structure and the second fastening structure are mutually limited along the third direction, and the second direction and the third direction are perpendicular to each other.

4. The printhead mounting assembly according to any one of claims 1 to 3, characterized in that: The first fastening structure is configured as a fastening position, and the fastening position is a through hole on the bottom; The second fastening structure is configured as a limiting buckle, the limiting buckle including a locking protrusion that is inserted into the through hole; The printhead assembly can rotate around the connecting shaft, and the through hole limits the rotation range of the card protrusion. The through hole also limits the card protrusion in the third direction and the first direction.

5. The printhead mounting assembly according to any one of claims 1 to 3, characterized in that: The printhead assembly includes a base plate portion and a side plate portion, the side plate portion being bent and connected to the edge of the base plate portion; The substrate portion is used to connect to the print head; The hook and / or the second fastening structure are respectively disposed on one of the corresponding side plate portions.

6. A printer module, including a printhead mounting assembly and a roller assembly, wherein the roller assembly is detachably connected to the printhead mounting assembly, and each of the roller assembly has a mating section on both axial sides; Its features are: The printhead mounting assembly is the printhead mounting assembly described in any one of claims 1 to 5; The side portion is also provided with a first locking position; The roller assembly is opposite to the printhead assembly, and each of the mating segments is located in a corresponding first slot.

7. The printer cartridge according to claim 6, characterized in that: The printhead mounting assembly also includes a cover opening mechanism and a reset mechanism; The cover-opening actuator is provided with a shaft hole, and the cover-opening actuator is also provided with an operating part and a blocking part, the blocking part and the operating part being located at different positions on the outer periphery of the shaft hole; The shaft hole mates with the connecting shaft, and the reset component is connected between the cover opening actuator and the bracket. The force of the reset member keeps the opening mechanism in the locked position, each of the mating sections is located in a corresponding first locking position, and the blocking part prevents the mating section from exiting the first locking position; When an external force is applied to the operating part, the opening mechanism can be forced to rotate to the unlocked position. When the opening mechanism is in the unlocked position, the blocking part releases its obstruction to the mating section.

8. The printer cartridge according to claim 7, characterized in that: In the first direction, the cover opening actuator is disposed between the printhead assembly and the side portion.

9. The printer cartridge according to any one of claims 6 to 8, characterized in that: The printer core also includes a motor and a gear set. The side also includes a motor connection structure and a gear connection structure. The motor is connected to the motor connection structure, and the gear set is connected to the gear connection structure.

10. A printer, characterized in that: The printer also includes the printer core as described in any one of claims 6 to 9.

Images