CN213734165U

CN213734165U - Thermal printer convenient to maintenance

Info

Publication number: CN213734165U
Application number: CN202022123769.6U
Authority: CN
Inventors: 杨纪端; 刘丹
Original assignee: Zhuhai Xinye Electronic Technology Co Ltd
Current assignee: Zhuhai Xinye Electronic Technology Co Ltd
Priority date: 2020-09-24
Filing date: 2020-09-24
Publication date: 2021-07-20
Anticipated expiration: 2030-09-24

Abstract

The utility model relates to a thermal printer technical field discloses a thermal printer convenient to maintenance, the front portion and the rear portion of its base all are connected with the mesochite through the screw, the inside at the base is installed to the circuit board, the front end of base is equipped with the supporting piece vertically, the front end of mesochite corresponds to be equipped with the supporting groove upwards concavely, the supporting piece is inserted and is located in the supporting groove, form the shaft hole between supporting piece and the supporting groove, be equipped with the connecting axle on the flip, the connecting axle is inserted and is located the shaft hole, but the middle part of flip's rear end joint mesochite, beat the rear portion that the printer head installed at the mesochite, the mesochite middle part is equipped with the second of 7 fonts and detains the piece, the upper cover front end is equipped with the first knot piece that detains of L shape, first knot piece and second knot piece lock joint, the mesochite rear end is equipped with first jack, the upper cover rear end corresponds and is equipped with the inserted block, the inserted block is inserted and is located in first jack, the upper cover is covered the top that beats printer head. The shell frames of the base, the middle shell, the upper cover and the turnover cover are easy to disassemble, and the printing heads and the circuit board are independently installed, so that the inspection and the maintenance are convenient.

Description

Thermal printer convenient to maintenance

Technical Field

The utility model relates to a thermal printer technical field especially relates to a thermal printer convenient to maintenance.

Background

With the popularization and application of thermal printers, the thermal printers are used in automatic teller machines of banks, cash registers of supermarkets and delivery places of e-commerce, especially printing of the e-commerce industry and the express delivery industry is rapidly increased, and higher requirements are put forward on the stability, the manufacturing process and the cost control of the printers. However, some thermal printers have a complicated structure, which is not favorable for inspection and maintenance of the thermal printer.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a thermal printer convenient to maintain, which is easy to maintain.

The utility model provides a technical scheme that its technical problem adopted does:

a thermal printer convenient for maintenance comprises a base, a middle shell, an upper cover, a turnover cover, a printing head and a circuit board, wherein the printing head is electrically connected with the circuit board, the front end and the lower end of the middle shell are coated on the base, the front part and the rear part of the base are connected with the middle shell through screws, the circuit board is arranged in the base, the front part of the middle shell is provided with a paper bin, the front end of the base is vertically provided with a supporting block, the front end of the middle shell is correspondingly provided with a supporting groove in an upward concave manner, the supporting block is inserted in the supporting groove, the upper end face of the supporting block and the upper part of the supporting groove form a shaft hole, the turnover cover is rotatably provided with a connecting shaft, the connecting shaft is inserted in the shaft hole, a torsion spring is arranged on the turnover cover in a penetrating manner, one end of the torsion spring is abutted to the middle shell, the other end of the torsion spring is abutted to the connecting shaft, and the rear end of the turnover cover can be clamped to the middle part of the middle shell, the flip can cover the top of the paper bin, the printing head is arranged at the rear part of the middle shell, the printing head comprises a rubber roller and a heat-sensitive sheet which are arranged front and back, the heat-sensitive sheet is abutted against the rubber roller, the rubber roller is positioned at the rear upper part of the paper bin, a 7-shaped second buckling block is vertically arranged in the middle of the middle shell, a first L-shaped buckling block is vertically arranged at the front end of the upper cover, the first buckling block and the second buckling block are buckled, a first jack is arranged at the front and back of the rear end of the middle shell in a penetrating manner, an inserting block is arranged at the rear end of the upper cover in a protruding manner correspondingly, the inserting block is inserted into the first jack, and the upper cover covers the top of the printing head.

As an improvement of the technical scheme, the base comprises a lower shell at the bottom and a front shell integrally arranged at the front end of the lower shell, a step protruding backwards is arranged at the joint of the lower shell and the front shell, the rear side face of the step is hollow, an inverted L-shaped reinforcing sheet is arranged on the step, the reinforcing sheet covers the rear side face of the step, and a splicing hole is formed in the reinforcing sheet.

As an improvement of the above technical scheme, a support is arranged at the rear part of the upper end of the lower casing, a threaded blind hole is vertically arranged on the support, a screw mounting hole is correspondingly arranged on the circuit board, the circuit board and the lower casing are connected in the screw mounting hole and the threaded blind hole through screws, a data interface module is arranged at the front part of the circuit board, and the front end of the data interface module is inserted into the insertion hole.

As the improvement of above-mentioned technical scheme, the left end of inferior valve is equipped with the switch mounting bracket, run through about on the switch mounting bracket and be equipped with the switch mounting hole, the left surface of mesochite is equipped with the switch hole, the switch hole is located the left side of switch mounting hole, just the switch hole covers the switch mounting hole, install switch module in the switch mounting hole, switch module and circuit board electricity are connected, switch module's left end is equipped with the switch button, the switch button is located the switch hole.

As an improvement of the above technical scheme, an inverted L-shaped supporting clamping block is arranged at the lower end of the front part of the middle shell, the supporting clamping block is located on the outer wall of the lower end of the paper bin, the supporting clamping block is clamped on the reinforcing sheet, a 7-shaped hook is arranged at the front end of the middle shell, a hanging groove is arranged at the corresponding position at the rear end of the front shell, and the front part of the hook is inserted into the hanging groove.

As above-mentioned technical scheme's improvement, the rear end of mesochite is equipped with the demonstration forward concavely and dodges the groove, the demonstration dodges the downside outer wall in groove and installs the demonstration lamp plate, show lamp plate and circuit board electricity and connect, be equipped with lamp pearl and button on the demonstration lamp plate, lamp pearl and button all insert and locate to show the lower lateral wall that dodges the groove.

As an improvement of the technical scheme, the front part of the middle shell is provided with a printing head mounting groove, the left side and the right side of the bottom surface of the printing head mounting groove are respectively provided with a first limiting bulge and a second limiting bulge, the printing head comprises a printing head support, the rubber roller and the thermosensitive plate are arranged at the front part of the printing head support, the lower end of the printing head support is arranged between the first limiting bulge and the second limiting bulge, and the lower end of the printing head support is connected with the bottom wall of the printing head mounting groove through screws.

As an improvement of the above technical solution, the lower end of the rear portion of the flip is horizontally provided with a connecting plate, the left side of the lower end of the connecting plate is vertically provided with a clamping plate, the rear end of the clamping plate is provided with a bayonet, the bayonet is a U-shaped groove with an opening facing backwards, the middle shell is internally provided with a curved plate, the front end of the curved plate is provided with a clamping shaft, the curved plate is connected to the middle shell through a hinge shaft, the hinge shaft is located at the rear lower portion of the clamping shaft, the curved plate can rotate around the hinge shaft, the front end of the curved plate is horizontally provided with a first shifting plate, the left side of the middle shell is provided with a toggle switch, the toggle switch can slide up and down, the right side of the toggle switch is provided with a second shifting plate, the second shifting plate is located right above the first shifting plate, and when the flip is fastened to the middle shell, the clamping shaft is clamped in the bayonet.

As an improvement of the above technical solution, a switch groove is vertically provided on the left side of the middle shell, the toggle switch is inserted into the switch groove, a third insertion hole and a guide hole are vertically provided on the bottom surface of the switch groove, a second buckle block and a guide pillar are vertically provided on the lower end of the toggle switch, the second buckle block and the guide pillar are respectively inserted into the third insertion hole and the guide hole, the toggle switch can slide up and down along the guide hole, a dial groove is provided on the left side of the toggle switch, a dial hole is further provided on the left side of the switch groove in a penetrating manner, and the dial hole covers the dial groove.

As an improvement of the above technical scheme, an identification strip is installed at the rear end of the middle shell, a second jack is arranged at the rear end of the middle shell in a penetrating manner, the second jack and the first jack are horizontally arranged, a buckle group is arranged on the identification strip forwards and comprises a first buckle and a second buckle which are horizontally arranged, the first buckle and the second buckle are horizontal 7-shaped blocks, and the first buckle and the second buckle are respectively inserted into the first jack and the second jack.

The utility model discloses wherein the beneficial effect of one side has:

according to one aspect of the present disclosure, the housing frames of the thermal printer base, the middle case, the upper cover and the flip cover are easily disassembled, the base and the middle case are connected by screws, a connecting shaft for hinging the flip cover is installed in a shaft hole formed between the base and the middle case, the flip cover is naturally disassembled after the base and the middle case are separated, the insert block of the upper cover is drawn out from the first jack of the middle case, the first buckle block and the second buckle block are staggered and unfastened, the upper cover and the middle case are also disassembled, and the easy disassembly of the housing frames greatly facilitates inspection and maintenance; moreover, the printing head is an independent module and is arranged on the middle shell, the printing head is positioned between the upper cover and the middle shell, so that when the printing head has any fault, only the upper cover needs to be uncovered without detaching other places, the circuit board is arranged in the base in the same way, and when the circuit board needs to be checked, only the screw for connecting the base and the middle shell needs to be unscrewed, so that the printing head can be checked or replaced independently, important parts are mutually independent, the maintenance is further facilitated, and the time cost of the maintenance can be reduced.

Drawings

The present invention will be further described with reference to the accompanying drawings and specific embodiments, wherein:

fig. 1 is a schematic perspective view of one embodiment of the present invention;

fig. 2 is a side view of one of the embodiments of the present invention;

FIG. 3 is a schematic cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is a schematic cross-sectional view taken at B-B of FIG. 2;

fig. 5 is a partial schematic structural view of one embodiment of the present invention;

FIG. 6 is an enlarged view of a portion of FIG. 5 at C;

FIG. 7 is an enlarged view of a portion of FIG. 5 at D;

fig. 8 is a schematic perspective view of a flip cover according to one embodiment of the present invention;

fig. 9 is a schematic perspective view of a base in one embodiment of the present invention.

Detailed Description

Referring to fig. 1 to 9, the present invention discloses a thermal printer convenient for maintenance, which includes a base 1, a middle casing 2, an upper cover 3, a flip 4, a printing head 5 and a circuit board 6, wherein the printing head 5 is electrically connected with the circuit board 6, the base 1 covers the front end and the lower end of the middle casing 2, the front part and the rear part of the base 1 are both connected with the middle casing 2 through screws, the circuit board 6 is installed inside the base 1, the front part of the middle casing 2 is provided with a paper bin 213, the front end of the base 1 is vertically provided with a supporting block 12, the front end of the middle casing 2 is correspondingly provided with a supporting groove 24 in an upward concave manner, the supporting block 12 is inserted into the supporting groove 24, the upper end surface of the supporting block 12 and the upper part of the supporting groove 24 form a shaft hole 101, the flip 4 is rotatably provided with a connecting shaft 10, the connecting shaft 10 is inserted into the shaft hole 101, the torsional spring 9 is penetrated through the connecting shaft 10, one end of the torsion spring 9 is abutted to the middle shell 2, the other end of the torsion spring 9 is abutted to the flip 4, the rear end of the flip 4 can be clamped to the middle part of the middle shell 2, the flip 4 can cover the upper part of the paper bin 213, the printing head 5 is installed at the rear part of the middle shell 2, the printing head 5 is positioned between the upper cover 3 and the middle shell 2, the printing head 5 comprises a rubber roller 51 and a heat-sensitive sheet which are arranged in the front and at the back, the heat-sensitive sheet is abutted to the rubber roller 51, the rubber roller 51 is positioned at the rear upper part of the paper bin 213, the middle part of the middle shell 2 is vertically provided with a 7-shaped second buckling block 23, the front end of the upper cover 3 is vertically provided with an L-shaped first buckling block 32, the first buckling block 32 and the second buckling block 23 are buckled, the rear end of the middle shell 2 is provided with a first jack 22 in a penetrating manner from the front to the back, the rear end of the upper cover 3 is correspondingly provided with an insertion block 31 in a protruding manner, and the insertion hole 31 is inserted into the first jack 22, the upper cover 3 covers the upper side of the print head 5.

Specifically, firstly, the shell frames of the base 1, the middle shell 2, the upper cover 3 and the flip cover 4 are easily disassembled, the base 1 and the middle shell 2 are connected through screws, the connecting shaft 10 for hinging the flip cover 4 is installed in the shaft hole 101 formed between the base 1 and the middle shell 2, after the base 1 and the middle shell 2 are separated, the flip cover 4 is naturally disassembled, the insert block 31 of the upper cover 3 is drawn out from the first jack 22 of the middle shell 2, and the first buckle block 32 and the second buckle block 23 are staggered and untied, so that the upper cover 3 and the middle shell 2 are also disassembled, and the shell frames are easily disassembled, thereby greatly facilitating the inspection and the maintenance; secondly, print head 5 is an independent module, install on mesochite 2, print head 5 and be located between upper cover 3 and mesochite 2, print head 5 has what trouble like this, just need only to open upper cover 3, and need not tear other places open, circuit board 6 installs in the inside of base 1 like the same, when circuit board 6 needs the inspection, also only need unscrew the screw of connecting base 1 and mesochite 2, can inspect or change alone, important part is independent each other, further made things convenient for the maintenance, can reduce the time cost of maintenance.

Referring to fig. 6, a printing head mounting groove 220 is formed in the front portion of the middle casing 2, a first limiting protrusion and a second limiting protrusion are respectively formed on the left side and the right side of the bottom surface of the printing head mounting groove 220, the printing head 5 includes a printing head bracket 53, the rubber roller 51 and the thermal sensitive sheet are both disposed in the front portion of the printing head bracket 53, the lower end of the printing head bracket 53 is disposed between the first limiting protrusion and the second limiting protrusion, and the lower end of the printing head bracket 53 is connected to the bottom wall of the printing head mounting groove 220 through a screw. The entire module of the printhead 5 can be removed for further inspection and replacement, conveniently and quickly, by removing the attachment screws of the printhead holder 53 and the bottom wall of the printhead mounting slot 220.

Referring to fig. 9, the base 1 includes a lower shell 13 at the bottom and a front shell 14 integrally arranged at the front end of the lower shell 13, a step 15 protruding backward is arranged at the joint of the lower shell 13 and the front shell 14, the rear side surface of the step 15 is hollow, an inverted L-shaped reinforcing sheet 7 is arranged on the step 15, the reinforcing sheet 7 covers the rear side surface of the step 15, and an insertion hole is formed in the reinforcing sheet 7.

Further, a slot 16 is formed in the base 1, the slot 16 is located at the rear side of the step 15, a positioning column 17 is arranged on the upper end face of the step 15, a positioning hole is correspondingly formed in the upper end of the reinforcing sheet 7, the lower end of the reinforcing sheet 7 is inserted into the slot 16, and the positioning column 17 is inserted into the positioning hole. The positioning column 17 is connected with the positioning hole, the slot 16 and the lower end of the reinforcing sheet 7 in an inserting mode, so that the positioning is accurate, and the operation of installation and disassembly is convenient.

Moreover, a support is arranged at the rear part of the upper end of the lower shell 13, a threaded blind hole is vertically arranged on the support, a screw mounting hole 61 is correspondingly arranged on the circuit board 6, the circuit board 6 and the lower shell 13 are connected in a mode of being mounted in the screw mounting hole 61 and the threaded blind hole through screws, a data interface module 62 is arranged at the front part of the circuit board 6, and the front end of the data interface module 62 is inserted into the insertion hole.

Furthermore, the left end of inferior valve 13 is equipped with switch mounting bracket 131, run through on switch mounting bracket 131 about and be equipped with the switch mounting hole, the left surface of mesochite 2 is equipped with the switch hole, the switch hole is located the left side of switch mounting hole, just the switch hole covers the switch mounting hole, install switch module 18 in the switch mounting hole,

switch module

18 and 6 electricity connections of circuit board, switch module 18's left end is equipped with switch button 181, switch button 181 is located the switch hole.

Further, an inverted L-shaped supporting clamping block is arranged at the lower end of the front portion of the middle shell 2, the supporting clamping block is located on the outer wall of the lower end of the paper bin 213, the supporting clamping block is clamped on the reinforcing sheet 7, a 7-shaped hook is arranged at the front end of the middle shell 2, a hanging groove 19 is formed in the corresponding position of the rear end of the front shell 14, and the front portion of the hook is inserted into the hanging groove 19.

Specifically, the rear end of mesochite 2 is equipped with the demonstration forward concavely and dodges groove 216, show that the downside outer wall of dodging groove 216 is installed and is shown lamp plate 217, show that lamp plate 217 is located between mesochite 2 and the base 1, show

lamp plate

217 and 6 electricity of circuit board and connect, be equipped with lamp pearl 218 and button 219 on the display lamp plate 217, lamp pearl 218 and button 219 all insert and locate to show the lower lateral wall of dodging groove 216. Circuit board 6, switch module 18 and display lamp plate 217 all are located between mesochite 2 and the base 1, and in same space, both made things convenient for the plug wire, the convenient inspection together again.

Referring to fig. 6 and 8, a connecting plate 43 is horizontally disposed at the lower end of the rear portion of the flip 4, a clamping plate 42 is vertically disposed at the left side of the lower end of the connecting plate 43, a bayonet 41 is disposed at the rear end of the clamping plate 42, the bayonet 41 is a U-shaped groove with an opening facing backward, a curved plate 26 is disposed in the middle shell 2, a clamping shaft is disposed at the front end of the curved plate 26, in this embodiment, the clamping shaft is a core shaft of a rubber roller 51, the curved plate 26 is connected to the middle shell 2 through a hinge shaft 27, the hinge shaft 27 is located behind and below the clamping shaft, the curved plate 26 is rotatable around the hinge shaft 27, a first toggle plate 261 is horizontally disposed at the front end of the curved plate 26, a toggle switch 28 is disposed at the left side of the middle shell 2, the toggle switch 28 is slidable up and down, a second toggle plate 281 is disposed at the right side of the toggle switch 28, the second toggle plate 281 is located directly above the first toggle plate 261, and when the flip 4 is fastened to the middle shell 2, the latch shaft is latched in the latch opening 41.

Specifically, when the flip cover 4 is in a state of being fastened to the middle case 2, the toggle switch 28 is moved downward, that is, when the user presses the toggle switch 28 downward, the second toggle plate 281 presses the first toggle plate 261, and the first toggle plate 261 is integrated with the curved plate 26, so that the curved plate 26 is rotated rearward and downward around the hinge shaft 27 by a downward force, the latch shaft rotates rearward and downward along with the curved plate 26, the latch shaft located in the bayonet 41 drives the latch plate 42 to move downward, since the latch plate 42 and the flip cover 4 are integrated, the flip cover 4 is rotated forward and downward around the hinge shaft 10 by a downward force, so that the bayonet 41 rotates forward and downward, and since the latch shaft rotates rearward and downward, when a certain position is reached, the latch shaft and the bayonet 41 are disengaged, and the flip cover 4 is automatically rotated forward and upward and opened under the action of the torsion spring 9.

Referring to fig. 2, a switch groove 29 is vertically arranged on the left side of the middle shell 2, the toggle switch 28 is inserted into the switch groove 29, a third insertion hole and a guide hole are vertically arranged on the bottom surface of the switch groove 29, a second fastening block and a guide pillar are vertically arranged at the lower end of the toggle switch 28, the second fastening block and the guide pillar are respectively inserted into the third insertion hole and the guide hole, the toggle switch 28 can slide up and down along the guide hole, a shifting groove 282 is arranged on the left side of the toggle switch 28, a shifting hole 210 is further penetratingly arranged on the left side surface of the switch groove 29, and the shifting hole 210 covers the shifting groove 282. The dial hole 210 functions to communicate the dial groove 282 with the outside, and the user presses the toggle switch 28 by pressing the lower side of the dial groove 282.

Referring to fig. 3 and 4, the back end of the middle shell 2 is provided with an identification strip 8, the back end of the middle shell 2 is provided with a second jack 25 passing through the front and back, the second jack 25 and the first jack 22 are horizontally arranged, the identification strip 8 is provided with a buckle group forwards, the buckle group comprises a first buckle 82 and a second buckle 81 which are horizontally arranged, the first buckle 82 and the second buckle 81 are both horizontal 7-shaped blocks, and the first buckle 82 and the second buckle 81 are respectively inserted into the first jack 22 and the second jack 25. The insert block 31 is inserted into the upper portion of the first insertion hole 22, and the first latch 82 is inserted into the lower portion of the first insertion hole 22. In the present embodiment, the length of the first insertion hole 22 in the vertical direction is greater than the length of the second insertion hole 25 in the vertical direction. The effect of sign strip 8, on the one hand can be as the sign of the different colours of product, on the other hand is, at equipment mesochite 2 and upper cover 3, reserve sufficient margin in order to make things convenient for the assembly for the space that inserts first jack 22 for inserted block 31, first jack 22 is longer than offered at vertical direction, after upper cover 3 lid is on mesochite 2, install sign strip 8 again, the lower part of first jack 22 can be sheltered from to sign strip 8, and is pleasing to the eye, also avoid dust debris to get into inside the casing through first jack 22.

Moreover, the rear end and the left and right sides of inferior valve 13 all are equipped with constant head tank 11, the rear end and the left and right sides of mesochite 2 lower extreme all correspond and are equipped with locating piece 21, the left and right sides of preceding 14 rear end faces all is equipped with constant head tank 11, the left and right sides of mesochite 2 front end all corresponds and is equipped with locating piece 21, locating piece 21 is inserted and is located in constant head tank 11. The constant head tank 11 is the recess along base 1 circumference edge, and locating piece 21 is the lug along 2 circumference edges of mesochite, and a large amount of uses of constant head tank 11 and locating piece 21 can conveniently aim at base 1 and mesochite 2 counterpoint each other on the one hand, and on the other hand has certain waterproof nature, can avoid liquid to get into inside the casing from the clearance between base 1 and mesochite 2 fingers to a certain extent.

It is noted that the terms first, second, third, etc. are used herein to describe various components or features, but these components or features are not limited by these terms. These terms are only used to distinguish one element or part from another element or part. Terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. For convenience of description, spatially relative terms such as "inner", "outer", "upper", "lower", "left", "right", "upper", "left", "right", and the like are used herein to describe the orientation relation of the components or parts in the present embodiment, but these spatially relative terms do not limit the orientation of the technical features in practical use.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention should be all included in the protection scope of the present invention as long as the technical effects are achieved by any of the same or similar means.

Claims

1. A thermal printer that facilitates maintenance, characterized by: comprises a base (1), a middle shell (2), an upper cover (3), a turnover cover (4), a printing head (5) and a circuit board (6), wherein the printing head (5) is electrically connected with the circuit board (6), the base (1) covers the front end and the lower end of the middle shell (2), the front part and the rear part of the base (1) are connected with the middle shell (2) through screws, the circuit board (6) is arranged in the base (1), the front part of the middle shell (2) is provided with a paper bin (213), the front end of the base (1) is vertically provided with a supporting block (12), the front end of the middle shell (2) is correspondingly provided with a supporting groove (24) in an upward concave manner, the supporting block (12) is inserted in the supporting groove (24), the upper end surface of the supporting block (12) and the upper part of the supporting groove (24) form a shaft hole (101), the turnover cover (4) is rotatably provided with a connecting shaft (10), the connecting shaft (10) is inserted in the shaft hole (101), a torsion spring (9) is arranged on the connecting shaft (10) in a penetrating manner, one end of the torsion spring (9) is abutted to the middle shell (2), the other end of the torsion spring (9) is abutted to the flip cover (4), the rear end of the flip cover (4) can be clamped to the middle part of the middle shell (2), the flip cover (4) can cover the upper part of the paper bin (213), the printing head (5) is arranged at the rear part of the middle shell (2), the printing head (5) comprises a rubber roller (51) and a heat-sensitive sheet which are arranged front and back, the heat-sensitive sheet is abutted to the rubber roller (51), the rubber roller (51) is positioned at the rear upper part of the paper bin (213), the middle part of the middle shell (2) is vertically provided with a second buckling block (23) in a shape like the 7, the front end of the upper cover (3) is vertically provided with a first buckling block (32) in an L shape, and the first buckling block (32) and the second buckling block (23), the rear end of the middle shell (2) is provided with a first jack (22) in a penetrating manner from front to back, the rear end of the upper cover (3) is provided with an insert block (31) in a protruding manner backwards correspondingly, the insert block (31) is inserted into the first jack (22), and the upper cover (3) covers the upper part of the printing head (5).

2. A maintenance-friendly thermal printer as set forth in claim 1, wherein: the base (1) comprises a lower shell (13) and a front shell (14), wherein the lower shell (13) comprises a bottom, the front shell (14) is integrally arranged at the front end of the lower shell (13), a backward convex step (15) is arranged at the joint of the lower shell (13) and the front shell (14), the rear side face of the step (15) is hollowed out, an inverted L-shaped reinforcing sheet (7) is arranged on the step (15), the rear side face of the step (15) is covered by the reinforcing sheet (7), and a splicing hole is formed in the reinforcing sheet (7).

3. A maintenance-friendly thermal printer as set forth in claim 2, wherein: the improved multifunctional socket is characterized in that a support is arranged at the rear part of the upper end of the lower shell (13), a threaded blind hole is vertically formed in the support, a screw mounting hole (61) is correspondingly formed in the circuit board (6), the circuit board (6) and the lower shell (13) are connected in the screw mounting hole (61) and the threaded blind hole through screws, a data interface module (62) is arranged at the front part of the circuit board (6), and the front end of the data interface module (62) is inserted into the plug hole.

4. A maintenance-friendly thermal printer as set forth in claim 2, wherein: the left end of inferior valve (13) is equipped with switch mounting bracket (131), run through about on switch mounting bracket (131) and be equipped with the switch mounting hole, the left surface of mesochite (2) is equipped with the switch hole, the switch hole is located the left side of switch mounting hole, just the switch hole covers the switch mounting hole, install switch module (18) in the switch mounting hole, switch module (18) and circuit board (6) electricity are connected, the left end of switch module (18) is equipped with switch button (181), switch button (181) are located the switch hole.

5. A maintenance-friendly thermal printer as set forth in claim 2, wherein: the lower extreme of mesochite (2) front portion is equipped with the support fixture block of falling L shape, support the outer wall that the fixture block is located paper storehouse (213) lower extreme, support the fixture block card on strengthening piece (7), the front end of mesochite (2) is equipped with 7 font couples, the rear end of preceding shell (14) is equipped with in corresponding position and hangs groove (19), the front portion of couple is inserted and is located hanging groove (19).

6. A maintenance-friendly thermal printer as set forth in claim 1, wherein: the rear end of mesochite (2) is equipped with the demonstration forward concavely and dodges groove (216), the demonstration dodges the downside outer wall of groove (216) and installs demonstration lamp plate (217), show lamp plate (217) and circuit board (6) electricity and connect, be equipped with lamp pearl (218) and button (219) on demonstration lamp plate (217), lamp pearl (218) and button (219) all insert and locate to show the downside wall of dodging groove (216).

7. A maintenance-friendly thermal printer as set forth in claim 1, wherein: the front portion of mesochite (2) is equipped with and beats printer head mounting groove (220), the left and right sides of beating printer head mounting groove (220) bottom surface is equipped with first spacing arch and the spacing arch of second respectively, it includes beats printer head support (53) to beat printer head (5), the front portion that beats printer head support (53) is all located to rubber roll (51) and temperature sensing piece, the lower extreme that beats printer head support (53) is arranged in between first spacing arch and the spacing arch of second, the lower extreme that beats printer head support (53) and the diapire that beats printer head mounting groove (220) pass through screw connection.

8. A maintenance-friendly thermal printer as set forth in claim 1, wherein: the lower end of the rear part of the flip cover (4) is horizontally provided with a connecting plate (43), the left side of the lower end of the connecting plate (43) is vertically provided with a clamping plate (42), the rear end of the clamping plate (42) is provided with a clamping opening (41), the clamping opening (41) is a U-shaped groove with a backward opening, a curved plate (26) is arranged in the middle shell (2), the front end of the curved plate (26) is provided with a clamping shaft, the curved plate (26) is connected to the middle shell (2) through a hinge shaft (27), the hinge shaft (27) is positioned at the rear lower part of the clamping shaft, the curved plate (26) can rotate around the hinge shaft (27), the front end of the curved plate (26) is horizontally provided with a first shifting plate (261), the left side of the middle shell (2) is provided with a toggle switch (28), the toggle switch (28) can slide up and down, the right side of the toggle switch (28) is provided with a second shifting plate (281), and the second shifting plate (281) is positioned right above the first shifting plate (261), when the flip cover (4) is buckled on the middle shell (2), the clamping shaft is clamped in the bayonet (41).

9. A maintenance-friendly thermal printer as set forth in claim 8, wherein: the left side of the middle shell (2) is vertically provided with a switch groove (29), the toggle switch (28) is inserted into the switch groove (29), the bottom surface of the switch groove (29) is vertically provided with a third jack and a guide hole, the lower end of the toggle switch (28) is vertically provided with a second buckling block and a guide post, the second buckling block and the guide post are respectively inserted into the third jack and the guide hole, the toggle switch (28) can slide up and down along the guide hole, the left side of the toggle switch (28) is provided with a shifting groove (282), the left side surface of the switch groove (29) is also provided with a shifting hole (210) in a penetrating manner, and the shifting hole (210) covers the shifting groove (282).

10. A maintenance-friendly thermal printer as set forth in claim 1, wherein: sign strip (8) are installed to the rear end of mesochite (2), the rear end of mesochite (2) is equipped with second jack (25) around running through, second jack (25) and first jack (22) level are arranged, be equipped with buckle group forward on sign strip (8), buckle group is including first buckle (82) and second buckle (81) that the level was arranged, first buckle (82) and second buckle (81) are the 7 style of calligraphy blocks of horizontally, first buckle (82) and second buckle (81) are inserted respectively and are located first jack (22) and second jack (25).