printer

Abstract

This utility model relates to a printer, comprising: a frame; a printer core including a support assembly, a printhead assembly, and a roller assembly, wherein the support assembly is movably mounted on the frame, the printhead assembly is connected to the support assembly, and the roller assembly is disposed opposite to the printhead assembly; a paper feed motor mounted on the frame; a cutter assembly including a fixed bracket positioned above the frame; a contact spring located between the fixed bracket and the frame, the contact spring including a base plate and a support leg, the base plate being disposed on the outer bottom wall of the fixed bracket, and the support leg being connected to the housing of the paper feed motor and the support assembly; and a wire, the first end of which is connected to at least one of the support assembly, the housing of the paper feed motor, the fixed bracket, and the contact spring, and the second end being used for grounding; the housing of the paper feed motor, the support assembly, the fixed bracket, and the contact spring are all made of conductive materials. This device can discharge static electricity generated by the paper feed motor, the printer core, and the cutter assembly through a single contact spring, making assembly and disassembly convenient.

Description

Technical Field

[0001] This utility model relates to the field of printing apparatus technology, and in particular to a printer. Background Technology

[0002] During the printing process, printers are prone to generating static electricity due to the high-speed sliding friction of paper. When static electricity accumulates in the thermal printhead assembly, it can easily cause malfunctions or damage. To address this, some printers on the market typically have multiple metal structural components or multiple grounding wires to discharge static electricity from key components. This setup makes the printer's structure cumbersome and complex, causing inconvenience for the printer's assembly, disassembly, and maintenance. Utility Model Content

[0003] Therefore, it is necessary to address the problem that the anti-static measures adopted by some printers on the market result in a complicated printer structure, which brings inconvenience to the assembly, disassembly, and maintenance of the printer, and to provide a printer solution.

[0004] A printer includes: a frame; a printer core including a support assembly, a printhead assembly, and a roller assembly, the support assembly being movably mounted on the frame, the printhead assembly being connected to the support assembly, and the roller assembly being disposed opposite to the printhead assembly; a paper feed motor mounted on the frame and drivenly connected to the roller assembly; a cutter assembly including a fixed bracket disposed above the frame; a contact spring located between the fixed bracket and the frame, the contact spring including a base plate and a support foot disposed around the base plate, the base plate being disposed on the outer bottom wall of the fixed bracket, and the support foot being connected to the housing of the paper feed motor and the support assembly; and a wire, a first end of which is connected to at least one of the support assembly, the housing of the paper feed motor, the fixed bracket, and the contact spring, and a second end of which is used for grounding; the housing of the paper feed motor, the support assembly, the fixed bracket, and the contact spring are all made of conductive material.

[0005] This application provides a printer, including a frame, a printhead, a paper feed motor, and a cutter assembly. The cutter assembly has a contact spring at its bottom mounting bracket. When the mounting bracket is assembled with the frame, the contact spring's feet abut against the support assembly of the printhead and the housing of the paper feed motor, both mounted on the frame. Furthermore, a first end of a wire is connected to at least one of the support assembly, the housing of the paper feed motor, the mounting bracket, and the contact spring; the second end of the wire is used for grounding. This simple grounding method effectively discharges static electricity generated by the paper feed motor, printhead, and cutter assembly. This solution uses a single contact spring connected to the cutter assembly, printhead, and paper feed motor housing. Under pressure from the support assembly and / or the paper feed motor, the contact spring's feet can undergo stable elastic deformation, ensuring stable series connection and effective conductivity among multiple hardware components in the printer. Simultaneously, the contact spring has a simple and compact structure, is easy to install and remove, and can improve the assembly and maintenance efficiency of the printer.

[0006] In one embodiment, the second end of the wire is electrically connected to the ground wire of the circuit board assembly.

[0007] In one embodiment, the system further includes a housing comprising a housing body and a front cover. The front cover is movably disposed on the housing body and surrounds the housing body to form a first mounting cavity. The frame is disposed in the first mounting cavity. The roller assembly is disposed on the side of the front cover facing the first mounting cavity. The front cover is rotatable relative to the housing body to open or close, and to move the roller assembly away from or towards the printhead assembly. The support assembly includes a locking member and a rotating shaft. The two opposite sides of the locking member are rotatably disposed on the frame via the rotating shaft. The locking member has a limiting portion for locking the roller assembly. The locking member is rotatable relative to the frame to lock or unlock the roller assembly. The support leg includes a first support leg. One end of the first support leg is connected to the substrate, and the other end of the first support leg abuts against the locking member. The locking member is made of a conductive material. By adopting the above structure, the locking member has a limiting part that can lock the roller assembly. At the same time, the locking member can rotate relative to the frame to switch between locked and unlocked states. When the locking member is in the locked state, the limiting part locks and limits the roller assembly to ensure that the front cover cannot be opened and that the roller assembly can stably cooperate with the printhead assembly for printing. When the locking member is in the unlocked state, the limiting part of the limiting part on the roller assembly disappears, allowing the front cover to open and move the roller assembly away from the first mounting cavity. In addition, by using the first leg to abut against the movable locking member, the first leg can elastically deform relative to the substrate under the pressure of the locking member, so that the locking member can maintain connection with the first leg and discharge static electricity regardless of whether the locking member is in the locked or unlocked state.

[0008] In one embodiment, the locking member includes a mounting plate and two limiting portions. The two limiting portions extend from opposite sides of the mounting plate away from the contact spring. The bottoms of the two limiting portions are rotatably connected to the frame via a pivot. The top wall of the mounting plate is bent away from the limiting portions to form an abutment wall, which abuts against the first support leg. By adopting this structure, on the one hand, the two limiting portions can rotate synchronously via the mounting plate transmission; on the other hand, the abutment wall formed on the mounting plate for abutting against the first support leg makes it easier for designers to arrange the contact spring, allowing the contact spring to easily connect with the locking member via the abutment wall.

[0009] In one embodiment, the first leg includes a first segment and a second segment. The first segment extends downward and outward from the substrate to below the abutment wall, and the second segment extends upward from the end of the first segment away from the substrate, abutting against the bottom wall of the abutment wall. By adopting the above structure, the first leg is inclined relative to the substrate, making it easier for the first leg to undergo elastic deformation under the pressure of the abutment wall. Specifically, the first segment extends inclined from the substrate to below the abutment wall and has an upwardly extending second segment. When the installer connects the contact spring and the locking member, the abutment wall presses down on the second segment to fix and limit the first leg, making installation easier. At the same time, the elastically deformed first leg will tend to abut against the abutment wall, thus ensuring that the locking member remains connected to the second segment and discharges static electricity regardless of whether the locking member is in the locked or unlocked state.

[0010] In one embodiment, the second segment is capable of elastic deformation relative to the first segment.

[0011] In one embodiment, the angle between the second segment and the first segment is ≥ °.

[0012] In one embodiment, the support assembly further includes a compression spring, the two ends of which abut against the locking element and the printhead assembly, respectively. The pressure of the compression spring drives the printhead assembly to fit against the roller assembly. The compression spring allows the printhead assembly to effectively cooperate with the roller assembly for printing while also providing a certain amount of elastic movement relative to the frame. This improves the stability of paper feeding and reduces issues such as carbon buildup, print compression, and unclear printing.

[0013] In one embodiment, the two limiting portions cooperate with the mounting plate to form a second mounting cavity, and the compression spring is disposed in the second mounting cavity, with the two ends of the compression spring abutting against the mounting plate and the printhead assembly, respectively.

[0014] In one embodiment, the compression spring is made of a conductive material to ensure good conductivity when the support assembly is connected to the contact spring.

[0015] In one embodiment, the compression spring is a V-shaped compression spring with its opening facing upwards. The two ends of the V-shaped compression spring abut against the locking element and the printhead assembly, respectively. By using a V-shaped compression spring to abut against both, compared to traditional elastic elements such as cylindrical coil springs, the contact method changes from point contact to surface contact. This increases the connection area, resulting in more stable force application. Furthermore, the V-shaped compression spring is easier for installers to deform for installation, making the connection more convenient and reliable, and ultimately improving production efficiency.

[0016] In one embodiment, the printhead assembly includes a thermal pad and a heat sink. The heat sink is movably mounted on the frame. The end of the compression spring away from the locking member abuts against the heat sink. The thermal pad is disposed on the side of the heat sink away from the compression spring. Specifically, the heat sink is made of metal to ensure good electrical conductivity when the printhead assembly is connected to the support assembly. The heat generated by the thermal pad during operation can be conducted to the heat sink, thereby accelerating heat dissipation and cooling, which helps the thermal pad maintain stable operation.

[0017] In one embodiment, the bottom of the heat sink is rotatably connected to the frame via the pivot, and the end of the compression spring away from the locking member is fixedly connected to the heat sink.

[0018] In one embodiment, the support leg includes a second support leg, one end of which is connected to the substrate, and the other end of which extends along the length of the frame and abuts against the housing of the paper feed motor. The first support leg extends along the width of the frame. By providing a second support leg with an extension direction different from that of the first support leg for abutting against the housing of the paper feed motor, the movement of the locking mechanism can be prevented from affecting the connection between the paper feed motor housing and the contact spring, ensuring a stable abutment between the paper feed motor housing and the contact spring with good conductivity.

[0019] In one embodiment, a hook-shaped latch is formed on the side of the limiting part away from the mounting plate, which is used to lock the roller assembly. Specifically, bushings are formed at both ends of the roller assembly. When the outer cover is closed, the bushings at both ends of the roller assembly are engaged with the latches of the two limiting parts, thereby limiting and fixing the roller assembly. When the limiting part is switched to the unlocked state, the bushings are released from the latches, and the outer cover can be opened to move the roller assembly away from the printhead assembly.

[0020] In one embodiment, the cutter assembly further includes a moving blade, a fixed blade, and a paper-cutting motor. The paper-cutting motor and the moving blade are mounted on the fixed bracket. The fixed blade is mounted on the frame body and / or the front cover. The paper-cutting motor is driven to the moving blade to extend and retract relative to the fixed blade. When the moving blade extends, it can cooperate with the fixed blade to cut the printing medium.

[0021] In one embodiment, the substrate has a first connecting hole, and the fixing bracket has a second connecting hole. The first connecting hole and the second connecting hole are connected to the substrate and the fixing bracket by a first fastener. By adopting the above connection method, the first fastener and the connecting hole generate a preload through threaded engagement, forming a rigid mechanical connection between the contact spring and the fixing bracket. This effectively resists external impacts, vibrations, and load changes, and reduces the risk of loosening in vibrating environments.

[0022] In one embodiment, the first fastener is made of a conductive material to ensure good conductivity when the fixing bracket is connected to the contact spring.

[0023] In one embodiment, the frame has a clearance hole on the side facing the fixed bracket, and at least a portion of the first fastener is located in the clearance hole. By providing a clearance hole on the fixed bracket to allow the first fastener to pass, the printer structure can be made more compact, and the cooperation between the first fastener and the clearance hole can form a positioning effect, making the positioning and assembly of the fixed bracket and the frame bracket more convenient, and making it easier for the contact spring feet to be aligned and connected with the housing and support components of the paper feed motor.

[0024] In one embodiment, the frame has a recessed positioning groove on the side facing the fixed support, and at least a portion of the contact spring is located in the positioning groove. The positioning groove provides a positioning function for the contact spring, making it easier for the contact spring's support legs to align and connect with the housing and support assembly of the paper feed motor.

[0025] In one embodiment, the bottom wall of the positioning groove is provided with the clearance hole.

[0026] In one embodiment, the substrate is provided with a first positioning hole, and the fixing bracket is formed with a first positioning post, which is inserted into the first positioning hole. By adopting the above structure, the cooperation between the first positioning hole and the first positioning post can provide a positioning function for the assembly of the contact spring and the fixing bracket, so that when the fixing bracket is assembled with the frame, the support feet of the contact spring can be more easily aligned and connected with the housing and support components of the paper feed motor.

[0027] In one embodiment, one of the fixed bracket and the frame is provided with a second positioning hole, and the other of the fixed bracket and the frame is provided with a second positioning post, which is inserted into the second positioning hole. By adopting the above structure, the cooperation of the second positioning hole and the second positioning post provides a positioning function for the assembly of the fixed bracket and the frame, making it easier for the support feet of the contact spring to align and connect with the housing and support components of the paper feed motor during the assembly of the fixed bracket and the frame.

[0028] In one embodiment, the frame is made of plastic. Using a plastic frame as a carrier for fixing and installing components such as the printer core, paper feed motor, and cutter assembly has the advantages of being lightweight, low-cost, and easy to mold. It can also effectively prevent contact between the internal circuitry and external metal parts, reducing the risk of short circuits. Especially in humid environments or high static electricity scenarios, it can prevent leakage accidents. Attached Figure Description

[0029] Figure 1 A perspective view of the internal structure of a printer according to one embodiment;

[0030] Figure 2 An exploded view of a portion of the structure of a printer according to one embodiment;

[0031] Figure 3 This is a schematic diagram of the first assembly of the contact spring and the fixing bracket according to one embodiment.

[0032] Figure 4 This is a schematic diagram of the second assembly of the contact spring and the fixing bracket according to one embodiment;

[0033] Figure 5 This is a first partial structural cross-sectional view of a printer according to one embodiment (with the locking mechanism in the unlocked state).

[0034] Figure 6 for Figure 5 Enlarged view of region A;

[0035] Figure 7 This is a second partial structural cross-sectional view of a printer according to one embodiment (when the locking element is in the locked state).

[0036] Figure 8 An exploded view of a portion of the structure of a printer cartridge according to one embodiment;

[0037] Figure 9 This is a third partial structural cross-sectional view of a printer according to one embodiment.

[0038] The correspondence between the reference numerals and the component names is as follows:

[0039] 1. Frame, 101. Clearance hole, 102. Positioning groove, 11. Second positioning post;

[0040] 2 Printer core, 201 Second mounting cavity, 21 Support assembly, 211 Locking fastener, 2111 Mounting plate, 21111 Abutting wall, 2112 Limiting part, 21121 Hook, 212 Rotating shaft, 213 Compression spring, 22 Print head assembly, 221 Thermal sheet, 222 Heat sink, 23 Glue roller assembly;

[0041] 3. Paper feed motor;

[0042] 4. Cutting blade assembly, 401 second connecting hole, 402 second positioning hole, 41 fixed bracket, 411 first positioning post, 42 moving blade, 43 fixed blade;

[0043] 5 Contact spring, 501 First connecting hole, 502 First positioning hole, 51 Substrate, 52 Support, 521 First support, 5211 First segment, 5212 Second segment, 522 Second support;

[0044] 6. Electrical wires;

[0045] 7. First fastener. Detailed Implementation

[0046] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0047] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0048] The printer described below with reference to the accompanying drawings is an example of some embodiments of the present invention.

[0049] like Figures 1 to 4As shown, this embodiment discloses a printer, including: a frame 1; a printer core 2, which includes a support assembly 21, a printhead assembly 22, and a roller assembly 23. The support assembly 21 is movably mounted on the frame 1, the printhead assembly 22 is connected to the support assembly 21, and the roller assembly 23 is disposed opposite to the printhead assembly 22; a paper feed motor 3, which is mounted on the frame 1 and drivenly connected to the roller assembly 23; a cutter assembly 4, which includes a fixing bracket 41 disposed above the frame 1; and a contact spring 5. The contact spring 5 is located between the fixed bracket 41 and the frame 1. The contact spring 5 includes a base plate 51 and a support leg 52 disposed around the base plate 51. The base plate 51 is disposed on the outer bottom wall of the fixed bracket 41. The support leg 52 is connected to the housing of the paper feed motor 3 and the support assembly 21. The wire 6 has its first end connected to at least one of the support assembly 21, the housing of the paper feed motor 3, the fixed bracket 41 and the contact spring 5. The second end of the wire 6 is used for grounding. The housing of the paper feed motor 3, the support assembly 21, the fixed bracket 41 and the contact spring 5 are all made of conductive material.

[0050] This application provides a printer, including a frame 1, a print core 2, a paper feed motor 3, and a cutter assembly 4. The bottom of the fixing bracket 41 of the cutter assembly 4 is provided with a contact spring 5. When the fixing bracket 41 is assembled with the frame 1, the support foot 52 of the contact spring 5 will abut against the support assembly 21 of the print core 2 and the housing of the paper feed motor 3, which are mounted on the frame 1. In addition, the first end of the wire 6 is connected to at least one of the support assembly 21, the housing of the paper feed motor 3, the fixing bracket 41, and the contact spring 5, and the second end of the wire 6 is used for grounding. Thus, the static electricity generated by the paper feed motor 3, the print core 2, and the cutter assembly 4 can be discharged through this simple grounding method. This solution uses a contact spring 5 to connect to the cutter assembly 4, the printer core 2, and the paper feed motor 3 housing respectively. Under the pressure of the support assembly 21 and / or the paper feed motor 3, the support foot 52 of the contact spring 5 can undergo stable elastic deformation, which can ensure that multiple hardware parts on the printer maintain stable series connection and effective conductivity. At the same time, the contact spring 5 has a simple and compact structure and is easy to install and disassemble, which can help improve the assembly and maintenance efficiency of the printer.

[0051] In addition to the features of the above embodiments, this embodiment further specifies that the second end of the wire is electrically connected to the ground wire of the circuit board assembly.

[0052] like Figures 5 to 8As shown, in addition to the features of the above embodiments, this embodiment further includes: a housing, the housing including a housing body and a front cover, the front cover being movably disposed on the housing body and surrounding the housing body to form a first mounting cavity, the frame 1 being disposed in the first mounting cavity, the roller assembly 23 being disposed on the side of the front cover facing the first mounting cavity, the front cover being rotatably open or close relative to the housing body and driving the roller assembly 23 away from or closer to the printhead assembly 22, the support assembly 21 including a locking member 211 and a rotating shaft 212, the opposite sides of the locking member 211 being rotatably disposed on the frame 1 via the rotating shaft 212, the locking member 211 forming a limiting portion 2112 for locking the roller assembly 23, the locking member 211 being rotatable relative to the frame 1 to lock or unlock the roller assembly 23, the support leg 52 including a first support leg 521, one end of the first support leg 521 being connected to the base plate 51, the other end of the first support leg 521 abutting against the locking member 211, the locking member 211 being made of conductive material. By adopting the above structure, the locking member 211 has a limiting part 2112 that can lock the roller assembly 23. At the same time, the locking member 211 can rotate relative to the frame 1 to switch between the locked state and the unlocked state. When the locking member 211 is in the locked state, the limiting part 2112 locks and limits the roller assembly 23 to ensure that the front cover cannot be opened and that the roller assembly 23 can stably cooperate with the print head assembly 22 for printing. When the locking member 211 is in the unlocked state, the limiting part 2112 removes the restriction on the roller assembly 23, allowing the front cover to open and drive the roller assembly 23 away from the first mounting cavity. In addition, the first support leg 521 abuts against the movable locking member 211. The first support leg 521 can elastically deform relative to the substrate 51 under the pressure of the locking member 211, so that the locking member 211 and the first support leg 521 can remain connected and discharge static electricity regardless of whether the locking member 211 is in the locked state or the unlocked state.

[0053] like Figures 5 to 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the locking member 211 includes a mounting plate 2111 and two limiting parts 2112. The two limiting parts 2112 extend from opposite sides of the mounting plate 2111 away from the contact spring 5. The bottom of the two limiting parts 2112 is rotatably connected to the frame 1 via a pivot 212. The top wall of the mounting plate 2111 is bent away from the limiting parts 2112 to form an abutment wall 21111, which abuts against the first support leg 521. By adopting the above structure, on the one hand, the two limiting parts 2112 can rotate synchronously through the transmission of the mounting plate 2111. On the other hand, the mounting plate 2111 has an abutment wall 21111 for abutting against the first support leg 521, which makes it easier for designers to arrange the contact spring 5, so that the contact spring 5 can easily connect with the locking member 211 through the abutment wall 21111.

[0054] like Figures 5 to 7 As shown, in addition to the features of the above embodiments, this embodiment further defines that: the first leg 521 includes a first segment 5211 and a second segment 5212. The first segment 5211 extends downward and outward from the substrate 51 to below the abutment wall 21111. The second segment 5212 extends upward from the end of the first segment 5211 away from the substrate 51. The second segment 5212 abuts against the bottom wall of the abutment wall 21111. By adopting the above structure, the first leg 521 is inclined relative to the substrate 51, which makes it easier for the first leg 521 to undergo elastic deformation under the pressure of the abutment wall 21111. Specifically, the first segment 5211 extends inclinedly from the substrate 51 to the lower part of the abutment wall 21111 and has an upwardly extending second segment 5212. When the installer connects the contact spring 5 and the locking member 211, the abutment wall 21111 presses down on the second segment 5212 to fix and limit the first leg 521, making the installation easier. At the same time, the elastically deformed first leg 521 will have a tendency to press tightly against the abutment wall 21111, so that the locking member 211 and the second segment 5212 can be kept connected and static electricity can be discharged regardless of whether the locking member 211 is in the locked or unlocked state.

[0055] In addition to the features of the above embodiments, this embodiment further specifies that the second segment 5212 is capable of elastic deformation relative to the first segment 5211.

[0056] like Figure 6 As shown, in addition to the features of the above embodiments, this embodiment further defines that the included angle between the second segment 5212 and the first segment 5211 is ≥90°.

[0057] like Figures 5 to 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the support assembly 21 also includes a compression spring 213, the two ends of which abut against the locking member 211 and the printhead assembly 22 respectively, and the pressure of the compression spring 213 drives the printhead assembly 22 to fit against the roller assembly 23. The compression spring 213 allows the printhead assembly 22 to effectively cooperate with the roller assembly 23 for printing while also providing a certain amount of elastic movement space relative to the frame 1, thereby improving the stability of paper feeding and reducing the occurrence of carbon buildup, print compression, and unclear printing.

[0058] like Figures 5 to 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: two limiting parts 2112 cooperate with the mounting plate 2111 to form a second mounting cavity 201, and a compression spring 213 is disposed in the second mounting cavity 201, with the two ends of the compression spring 213 abutting against the mounting plate 2111 and the printhead assembly 22 respectively.

[0059] In addition to the features of the above embodiments, this embodiment further specifies that the compression spring 213 is made of conductive material to ensure good conductivity when the support assembly 21 is connected to the contact spring 5.

[0060] like Figures 5 to 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the compression spring 213 is a V-shaped compression spring, with the opening of the V-shaped compression spring facing upwards, and the two ends of the V-shaped compression spring abutting against the locking member 211 and the print head assembly 22 respectively. By using a V-shaped compression spring to abut against both, compared with traditional elastic elements such as cylindrical coil springs, the contact method is changed from point contact to surface contact, thereby increasing the connection area and making the force application more stable. At the same time, the V-shaped compression spring is easier for installers to squeeze and deform for installation, making the connection more convenient and reliable, which is conducive to improving production efficiency.

[0061] like Figures 5 to 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the printhead assembly 22 includes a thermal sheet 221 and a heat sink 222. The heat sink 222 is movably mounted on the frame 1. The end of the compression spring 213 away from the locking member 211 abuts against the heat sink 222. The thermal sheet 221 is disposed on the side of the heat sink 222 away from the compression spring 213. Specifically, the heat sink 222 is made of metal to ensure good electrical conductivity when the printhead assembly 22 is connected to the support assembly 21. The heat generated by the thermal sheet 221 during operation can be conducted to the heat sink 222, thereby accelerating heat dissipation and cooling, which is beneficial for the thermal sheet 221 to maintain stable operation.

[0062] like Figures 5 to 8 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the bottom of the heat sink 222 is rotatably connected to the frame 1 via the pivot 212, and the end of the compression spring 213 away from the locking member 211 is fixedly connected to the heat sink 222.

[0063] like Figure 2 , Figure 3 and Figure 9 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the support leg 52 includes a second support leg 522, one end of the second support leg 522 is connected to the base plate 51, and the other end of the second support leg 522 extends along the length direction of the frame 1 and abuts against the housing of the paper feed motor 3, while the first support leg 521 extends along the width direction of the frame 1. By providing a second support leg 522 with an extension direction different from that of the first support leg 521 for abutting against the housing of the paper feed motor 3, the movement of the locking member 211 can be prevented from affecting the connection between the housing of the paper feed motor 3 and the contact spring 5, ensuring that the housing of the paper feed motor 3 and the contact spring 5 are stably abutted and have good conductivity.

[0064] like Figure 7 and Figure 8As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a hook-shaped latch 21121 is formed on the side of the limiting part 2112 away from the mounting plate 2111, and the latch 21121 is used to lock the roller assembly 23. Specifically, bushings are formed at both ends of the roller assembly 23. When the outer cover is closed, the bushings at both ends of the roller assembly 23 are engaged with the latches 21121 of the two limiting parts 2112, thereby limiting and fixing the roller assembly 23; when the limiting part 2112 is switched to the unlocked state, the bushings are released from the latches 21121, and the outer cover can be opened to drive the roller assembly 23 away from the printhead assembly 22.

[0065] like Figure 1 and Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the cutter assembly 4 also includes a moving blade 42, a fixed blade 43 and a paper cutting motor, the paper cutting motor and the moving blade 42 are disposed on the fixed bracket 41, the fixed blade 43 is mounted on the frame 1 and / or the front cover, the paper cutting motor is drivenly connected to the moving blade 42 to drive the moving blade 42 to extend and retract relative to the fixed blade 43, and when the moving blade 42 extends, it can cooperate with the fixed blade 43 to cut the printing medium.

[0066] like Figure 3 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the substrate 51 is provided with a first connecting hole 501, and the fixing bracket 41 is provided with a second connecting hole 401. The first connecting hole 501 and the fixing bracket 41 are connected by a first fastener 7 through the second connecting hole 401. By adopting the above connection method, the first fastener 7 and the connecting hole generate a preload through threaded engagement, so that a rigid mechanical connection is formed between the contact spring 5 and the fixing bracket 41, which can effectively resist external impact, vibration and load changes, and reduce the risk of loosening in a vibration environment.

[0067] In addition to the features of the above embodiments, this embodiment further specifies that the first fastener 7 is made of a conductive material to ensure good conductivity when the fixing bracket 41 is connected to the contact spring 5.

[0068] like Figure 2 , Figure 3 and Figure 7As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a clearance hole 101 is provided on the side of the frame 1 facing the fixed bracket 41, and at least a portion of the first fastener 7 is located in the clearance hole 101. By providing a clearance hole 101 on the fixed bracket 41 to avoid the first fastener 7, the printer structure can be made more compact, and the cooperation between the first fastener 7 and the clearance hole 101 can form a positioning effect, making the positioning and assembly of the fixed bracket 41 and the frame 1 bracket more convenient, and making it easier for the support foot 52 of the contact spring 5 to be aligned and connected with the housing and support assembly 21 of the paper feed motor 3.

[0069] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: a positioning groove 102 is recessed on the side of the frame 1 facing the fixed bracket 41, and at least a portion of the contact spring 5 is located in the positioning groove 102. By providing the positioning groove 102, the contact spring 5 can be positioned, making it easier for the support leg 52 of the contact spring 5 to be aligned and connected with the housing and support assembly 21 of the paper feed motor 3.

[0070] like Figure 2 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the bottom wall of the positioning groove 102 is provided with a clearance hole 101.

[0071] like Figure 3 and Figure 4 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: the substrate 51 is provided with a first positioning hole 502, and the fixing bracket 41 is formed with a first positioning post 411, which is inserted into the first positioning hole 502. By adopting the above structure, the cooperation between the first positioning hole 502 and the first positioning post 411 can provide a positioning function for the assembly of the contact spring 5 and the fixing bracket 41, so that when the fixing bracket 41 is assembled with the frame 1, the support leg 52 of the contact spring 5 can be more easily aligned and connected with the housing and support assembly 21 of the paper feed motor 3.

[0072] like Figure 2 and Figure 3 As shown, in addition to the features of the above embodiments, this embodiment further specifies that: one of the fixed bracket 41 and the frame 1 is provided with a second positioning hole 402, and the other of the fixed bracket 41 and the frame 1 is formed with a second positioning post 11, which is inserted into the second positioning hole 402. By adopting the above structure, the cooperation between the second positioning hole 402 and the second positioning post 11 can provide a positioning function for the assembly of the fixed bracket 41 and the frame 1, so that when the fixed bracket 41 and the frame 1 are assembled, the support leg 52 of the contact spring 5 can be more easily aligned and connected with the housing and support assembly 21 of the paper feed motor 3.

[0073] In addition to the features of the above embodiments, this embodiment further specifies that: the frame 1 is made of plastic material. Using a plastic frame 1 as a carrier for fixing and installing components such as the printer core 2, paper feed motor 3, and cutter assembly 4 has the advantages of being lightweight, low-cost, and easy to mold. It can also effectively block the contact between its internal circuits and external metal parts, reducing the risk of short circuits. Especially in humid environments or high static electricity scenarios, it can prevent leakage accidents.

[0074] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0075] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A printer characterized by comprising: include: Rack (1); Printer core (2), the printer core (2) includes a support assembly (21), a print head assembly (22) and a rubber roller assembly (23), the support assembly (21) is movably disposed on the frame (1), the print head assembly (22) is connected to the support assembly (21), and the rubber roller assembly (23) is disposed opposite to the print head assembly (22); Paper feed motor (3), the paper feed motor (3) is mounted on the frame (1), and the paper feed motor (3) is drivenly connected to the rubber roller assembly (23); The cutter assembly (4) includes a fixed bracket (41) disposed above the frame (1); Contact spring (5), the contact spring (5) is located between the fixed bracket (41) and the frame (1), the contact spring (5) includes a base plate (51) and a support leg (52) disposed around the base plate (51), the base plate (51) is disposed on the outer bottom wall of the fixed bracket (41), and the support leg (52) is connected to the outer shell of the paper feed motor (3) and the support assembly (21); The first end of the wire (6) is connected to at least one of the support assembly (21), the housing of the paper feed motor (3), the fixing bracket (41) and the contact spring (5), and the second end of the wire (6) is used for grounding; The outer shell of the paper feed motor (3), the support assembly (21), the fixing bracket (41), and the contact spring (5) are all made of conductive material.

2. The printer of claim 1, wherein, It also includes a housing, which comprises a housing body and a front cover. The front cover is movably disposed on the housing body and surrounds the housing body to form a first mounting cavity. The frame (1) is disposed in the first mounting cavity. The roller assembly (23) is disposed on the side of the front cover facing the first mounting cavity. The front cover can be rotated to open or close relative to the housing body and drive the roller assembly (23) away from or towards the printhead assembly (22). The support assembly (21) includes a locking member (211) and a rotating shaft (212). The two opposite sides of the locking member (211) The side is rotatably mounted on the frame (1) via the pivot (212). The locking member (211) has a limiting part (2112) for locking the rubber roller assembly (23). The locking member (211) can rotate relative to the frame (1) to lock or unlock the rubber roller assembly (23). The support leg (52) includes a first support leg (521). One end of the first support leg (521) is connected to the base plate (51), and the other end of the first support leg (521) abuts against the locking member (211). The locking member (211) is made of conductive material.

3. The printer of claim 2, wherein, The locking member (211) includes a mounting plate (2111) and a limiting part (2112). There are two limiting parts (2112). The two limiting parts (2112) extend from opposite sides of the mounting plate (2111) away from the contact spring (5). The bottom of the two limiting parts (2112) is rotatably connected to the frame (1) through the pivot (212). The top wall of the mounting plate (2111) is bent away from the limiting part (2112) to form an abutment wall (21111). The abutment wall (21111) abuts against the first support leg (521).

4. The printer of claim 3, wherein, The first leg (521) includes a first segment (5211) and a second segment (5212). The first segment (5211) extends downward and outward from the substrate (51) to below the abutment wall (21111). The second segment (5212) extends upward from the end of the first segment (5211) away from the substrate (51). The second segment (5212) abuts against the bottom wall of the abutment wall (21111).

5. The printer of claim 2, wherein, The support assembly (21) also includes a compression spring (213), the two ends of which abut against the locking member (211) and the print head assembly (22) respectively. The pressure of the compression spring (213) drives the print head assembly (22) to fit against the rubber roller assembly (23).

6. The printer according to claim 5, characterized in that, The compression spring (213) is made of a conductive material; and / or The compression spring (213) is a V-shaped compression spring with its opening facing upwards. Both ends of the V-shaped compression spring abut against the locking element (211) and the printhead assembly (22), respectively; and / or The printhead assembly (22) includes a thermal sheet (221) and a heat sink (222). The heat sink (222) is movably mounted on the frame (1). The end of the compression spring (213) away from the locking member (211) abuts against the heat sink (222). The thermal sheet (221) is located on the side of the heat sink (222) away from the compression spring (213).

7. The printer according to claim 2, characterized in that, The support leg (52) includes a second support leg (522), one end of which is connected to the base plate (51), and the other end of which extends along the length of the frame (1) and abuts against the housing of the paper feed motor (3). The first support leg (521) extends along the width of the frame (1); and / or The limiting portion (2112) has a hook-shaped latch (21121) on the side away from the mounting plate (2111), the latch (21121) being used to lock the rubber roller assembly (23); and / or The cutter assembly (4) further includes a movable blade (42) and a fixed blade (43). The movable blade (42) is telescopically mounted on the fixed bracket (41), and the fixed blade (43) is mounted on the frame (1) and / or the front cover. When the movable blade (42) extends, it can cooperate with the fixed blade (43) to cut the printing medium.

8. The printer of claim 1, wherein, The substrate (51) is provided with a first connection hole (501), and the fixing bracket (41) is provided with a second connection hole (401). The first connection hole (501) and the fixing bracket (41) are connected by a first fastener (7) through the second connection hole (401).

9. The printer according to claim 8, characterized in that, The first fastener (7) is made of a conductive material; and / or The frame (1) has a clearance hole (101) on the side facing the fixed bracket (41), and at least a portion of the first fastener (7) is located in the clearance hole (101).

10. The printer according to any one of claims 1 to 9, characterized in that, The frame (1) has a recessed positioning groove (102) on the side facing the fixed bracket (41), and at least a portion of the contact spring (5) is located in the positioning groove (102); and / or The substrate (51) is provided with a first positioning hole (502), and the fixing bracket (41) is formed with a first positioning post (411), the first positioning post (411) being inserted into the first positioning hole (502); and / or One of the fixed bracket (41) and the frame (1) is provided with a second positioning hole (402), and the other of the fixed bracket (41) and the frame (1) is formed with a second positioning post (11), which is inserted into the second positioning hole (402); and / or The frame (1) is made of plastic material.

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