CN216885864U - Uncap stable heat-transfer seal printer of operation - Google Patents

Abstract

The utility model provides a heat transfer printer with a stably opened cover, which comprises two cover opening parts, two latch hook parts, a rotating shaft and an elastic part, wherein the two latch hook parts are respectively positioned at two sides; the lock hook piece is provided with a drive plate in the middle, the two side walls of the cover body in the paper width direction are respectively provided with an upper limiting sliding hole, a lower limiting sliding hole and a through hole, a blocking wall is arranged between the upper limiting sliding hole and the lower limiting sliding hole, the drive plate is located on the inner side of the blocking wall, the cover opening piece is provided with an upper clamping hook, a lower clamping hook and a drive clamping hook, the cover opening piece is located on the outer side of the blocking wall, the upper clamping hook, the lower clamping hook and the edge of the upper limiting sliding hole and the lower limiting sliding hole are clamped, and the drive clamping hook penetrates through the through hole and is clamped with the drive plate. The present case drive plate, keep off the wall and uncap and be spacing ground clearance fit each other between the piece, open cover piece and latch hook and remove under the limited condition, when avoiding the part not hard up, can realize stably uncapping and close the lid.

Description

Uncap stable heat-transfer seal printer of operation

Technical Field

The utility model relates to the field of thermosensitive printing, in particular to a thermal transfer printer with stable uncapping operation.

Background

Along with the popularization and application of thermal transfer printers such as bill printers and label printers, the thermal transfer printer is used in automatic teller machines of banks, cash counters of supermarkets, catering industries and delivery places of e-commerce, especially, the printing of the thermal transfer printer is rapidly increased in the e-commerce industry and the express delivery industry, and the thermal transfer printer has higher requirements on the use stability and the operation convenience.

The thermal transfer printer is generally provided with a base, a cover body, a carbon ribbon frame, a rubber roller and a thermal sensitive sheet, wherein a carbon ribbon is arranged on the carbon ribbon frame, and the carbon ribbon enters a position between the rubber roller and the thermal sensitive sheet through printing paper and the carbon ribbon, and characters and patterns are formed on the printing paper by thermal transfer through heating of the thermal sensitive sheet.

In prior art, the carbon area frame sets up on the lid and overturns along with opening of lid, releases the locking of carbon area frame again after opening the lid, realizes the upset of carbon area frame again then and opens, carries out the change of carbon area and the change of beating printing paper afterwards. However, since the cover opening member and the latch hook member on the cover body are in a relatively free state and are in driving connection, and the related cover closing locking and unlocking are completed, the virtual position of the cooperation of the cover opening member and the latch hook member is large, and looseness is easily caused due to the operational stability of the cover opening.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a thermal transfer printer with stable uncapping operation.

In order to achieve the purpose, the utility model provides a thermal transfer printer with stable uncapping operation, which comprises a base, a cover body, a carbon belt frame, a carbon belt roller assembly, a rubber roller and a thermal sensitive sheet, wherein the cover body hinge part of the cover body is hinged to the base; the thermal transfer printer further comprises two cover opening parts, two latch hook parts, a rotating shaft and an elastic part, wherein the rotating shaft is rotatably arranged on the cover body, the two latch hook parts are respectively positioned on two sides of the thermal sensitive sheet in the paper width direction, the upper parts of the latch hook parts are provided with connecting holes, the rotating shaft is connected between the two connecting holes, the lower parts of the latch hook parts are provided with hook parts, the hook parts are detachably clamped with the cover fixing parts, and the elastic part is connected between the latch hook parts and the cover body; the locking hook piece is provided with a driving plate in the middle, two side walls of the cover body in the paper width direction are respectively provided with a limiting hole group, each limiting hole group comprises an upper limiting sliding hole, a lower limiting sliding hole and a through hole, a blocking wall is arranged between the upper limiting sliding hole and the lower limiting sliding hole, and the driving plate is located on the inner side of the blocking wall; the cover opening part is provided with an upper clamping hook, a lower clamping hook and a driving clamping hook, the cover opening part is positioned on the outer side of the blocking wall, the upper clamping hook is clamped with the edge of the upper limiting sliding hole, the lower clamping hook is clamped with the edge of the lower limiting sliding hole, the driving clamping hook penetrates through the through hole to be clamped with the driving plate, the driving plate is in clearance fit between the outer end clamping part of the driving clamping hook and the blocking wall, and the driving clamping hook can move in the through hole and drive the driving plate to move.

The cover body is provided with a mounting groove on the outer side of the blocking wall, and the cover opening piece is positioned in the mounting groove and can move in the mounting groove.

The edge of the mounting groove is provided with a first positioning step, the edge of the cover opening part is provided with a second positioning step, and the first positioning step is adjacent to the second positioning step.

The upper limiting slide hole and the lower limiting slide hole extend along the horizontal direction, the upper clamping hook can slide along the upper limiting slide hole, and the lower clamping hook can slide along the lower limiting slide hole.

In a further scheme, the through hole is positioned between the upper limiting slide hole and the lower limiting slide hole, and the upper limiting slide hole is communicated with the through hole.

In a further aspect, the outer end of the driving hook extends in the horizontal direction.

In a further scheme, the driving plate is provided with a matching step, and the driving clamping hook is positioned in the matching step.

Still further, the drive plate extends in a horizontal direction and the mating step is located at an end of the drive plate.

The utility model has the advantages that the upper and lower clamping hooks are respectively clamped with the upper and lower limiting sliding holes, and then the driving clamping hooks pass through the through holes to be clamped with the driving plate, so that the driving plate, the blocking wall and the cover opening part are in clearance fit with each other in a limiting way, the cover opening part and the locking hook part move under the limited condition, the loosening of parts is avoided, the cover opening and closing can be realized stably, and the operation stability of the parts is improved. In addition, the assembly stability of the cover opening part on the cover body is further improved through the positioning of the mounting groove and the positioning step. And, through last spacing slide opening and perforation intercommunication, it is more convenient when assembling spacing punch combination to open the lid then, avoids the screens assembly not in good order, is connected with the drive pothook through the cooperation step of drive plate moreover for drive pothook and cooperation step are when spacing cooperation, guarantee both when drive and removal, and the separation of not misplacing guarantees connection stability.

Drawings

FIG. 1 is a block diagram of an embodiment of a thermal transfer printer according to the present invention.

Fig. 2 is a structural view of the thermal transfer printer according to the embodiment of the present invention when the cover is opened.

FIG. 3 is an exploded view of an embodiment of the thermal transfer printer of the present invention.

Fig. 4 is a structural view at the cover in the embodiment of the thermal transfer printer of the present invention.

FIG. 5 is a block diagram of a ribbon cartridge in an embodiment of a thermal transfer printer according to the present invention.

FIG. 6 is a schematic diagram of a thermal transfer printer according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view of an embodiment of the thermal transfer printer of the present invention as the cover is closed.

Fig. 8 is a cross-sectional view of an embodiment of the thermal transfer printer of the present invention with the cover opened.

FIG. 9 is a schematic diagram of a locking member and a plunger in an embodiment of the thermal transfer printer according to the utility model.

Fig. 10 is an exploded view of a cover release member and a latch member in an embodiment of the thermal transfer printer of the present invention.

FIG. 11 is a cross-sectional view of an embodiment of the thermal transfer printer of the present invention at the opening member.

Fig. 12 is a structural view at a base in an embodiment of the thermal transfer printer of the present invention.

FIG. 13 is a block diagram of a roll stand in an embodiment of the thermal transfer printer of the present invention.

FIG. 14 is a cross-sectional view of an embodiment of a thermal transfer printer of the present invention at a rotatable member.

FIG. 15 is a cross-sectional view of an embodiment of a thermal transfer printer of the present invention at a stop.

FIG. 16 is a block diagram of a mounting block and a clamping block in an embodiment of a thermal transfer printer according to the utility model.

FIG. 17 is an exploded view of a mounting block and a clamping block in an embodiment of a thermal transfer printer according to the utility model.

Fig. 18 is a cross-sectional view in the paper width direction of an embodiment of the thermal transfer printer of the present invention at a mounting block.

Fig. 19 is a cross-sectional view of an embodiment of a thermal transfer printer of the present invention at a mounting block in the direction of paper feed.

The utility model is further explained with reference to the drawings and the embodiments.

Detailed Description

Referring to fig. 1 to 8, the thermal transfer printer includes a base 4, a cover 1, a carbon belt frame 2, a carbon belt roller assembly, a rubber roller 102, and a thermal sensitive sheet 101, wherein a cover hinge 11 of the cover 1 is hinged to the base 4, the rubber roller 102 is rotatably disposed on the base 4, the thermal sensitive sheet 101 and the carbon belt roller assembly are disposed on the carbon belt frame 2, the thermal sensitive sheet 101 is disposed opposite to the rubber roller 102, the base 4 is provided with a paper bin 43, the thermal sensitive sheet 101 and the rubber roller 102 are opposite to each other and form a paper feeding channel, the paper feeding channel is communicated between the paper bin 43 and a paper outlet 401, and the cover hinge 11 and the rubber roller 102 are disposed on opposite sides. The carbon belt frame 2 is positioned in the cover body 1, the carbon belt frame hinge part of the carbon belt frame 2 is hinged to the base 4, and the carbon belt frame hinge part is positioned between the cover body hinge part 11 and the rubber roller 102.

The thermal transfer printer further includes two links 214 and a support 23, the two links 214 are located on both sides in a paper width direction, which refers to a width direction of the printing paper, a paper feeding direction of the paper feeding path refers to a length direction of the printing paper, and the paper width direction and the paper feeding direction are perpendicular to each other.

The inner side of the cover body 1 is respectively provided with a first hinge part 12 at two sides in the paper width direction, the first hinge part 12 is positioned above the cover body hinge part 11, the two sides of the carbon belt frame 2 in the paper width direction are respectively provided with a first positioning groove 212 and a second hinge part 213, the second hinge part 213 is positioned in the first positioning groove 212, the first hinge part 12 and the second hinge part 213 are arranged in a hinge column manner, the second hinge part 213 is positioned above the carbon belt frame hinge part, one end of a connecting rod 214 is positioned in the first positioning groove 212 in clearance fit, the connecting rod 214 at the same side is hinged between the first hinge part 12 and the second hinge part 213, then the connecting rod 214 is hinged between the cover body 1 and the carbon belt frame 2, and the cover body 1 drives the carbon belt frame 2 to rotate towards the same direction.

The hinge 11 of the cover, the hinge of the carbon ribbon holder, the first hinge 12 and the second hinge 213 are disposed in a parallelogram, the connecting rod 214 is located on the side of the hinge 11 of the cover close to the rubber roller 102 when the cover 1 and the base 4 are closed, and the connecting rod 214 is located above the hinge 11 of the cover when the cover 1 and the base 4 are opened.

The support member 23 includes a cross bar 231 and arms 233 at two ends of the cross bar 231, the arms 233 extend in an arc shape, a connecting portion 232 is disposed in the middle of the cross bar 231, a rotating shaft is disposed on the connecting portion 232, a support rod 234 is disposed at the lower end of the arms 233, the support rod 234 extends outward, and the connecting portion 232 is hinged to the inner surface of the cover body 1.

The carbon tape frame 2 comprises two side frames 21 and a cross frame 24 connected between the two side frames 21, the heat sensitive sheet 101 is arranged on the cross frame 24, the carbon tape roller assembly comprises a recovery roller 221 and a roller to be printed 222, the recovery roller 221 and the roller to be printed 222 are respectively rotatably arranged between the side frames 21 and are positioned above the cross frame 24, inner end surfaces of the two side frames 21 of the carbon tape frame 2 are respectively provided with a sliding groove 215, the sliding grooves 215 extend in an arc shape, the lower portion of the sliding groove 215 is provided with a second positioning groove 216, the lower portion of the second positioning groove 216 is provided with a supporting wall, and the supporting wall is positioned in the middle and is positioned between a hinged portion of the carbon tape frame and the heat sensitive sheet 101.

In the closed state of the cover 1 and the base 4, the support rod 234 can move from the sliding groove 215 into the second positioning groove 216, the support rod 234 is located above and adjacent to the support wall, and then the cover 1 is fixed as a support, the support rod 234 of the support 23 is used for providing downward pressing support for the carbon belt frame 2, and meanwhile, above the heat-sensitive sheet, the inner surface of the cover 1 is adjacent to the upper surface of the side frame 21 and also provides downward pressing support for the carbon belt frame 2, so that the heat-sensitive sheet is opposite to and in contact with the rubber roller. In the opened state of the cover 1 and the base 4, the supporting rod 234 is separated from the second positioning groove 216, and moves along the sliding groove 215 and moves to the middle of the sliding groove 215.

A carbon belt frame hinge part is arranged at the end part of the side frame 21 at one side, the carbon belt frame hinge part is arranged in a gear groove 211, two gear grooves 211 are arranged at two opposite sides in the paper width direction, the base 4 is respectively provided with a gear damper 41 at two opposite sides in the paper width direction, two gear dampers 41 are respectively arranged at two opposite sides in the paper width direction of the paper bin 43, the shell of the gear damper 41 is fixedly connected with the base 4, the gear damper 41 is arranged between the cover body hinge part 11 and the rubber roller 102, the gears of the two gear dampers 41 are oppositely arranged inwards, the two gear grooves 211 are arranged between the shells of the two gear dampers 41, the two gear dampers 41 are arranged at the inner side of the cover body 1, the gears of the gear dampers 41 are arranged in the gear grooves 211, the carbon belt frame 2 rotates around the gears of the gear dampers 41, thereby realizing the slow rotation of the carbon belt frame 2, and is communicated with the cover body 1 through a connecting rod 214, the cover is slowly opened.

The axial end part of the rubber roller 102 is provided with a first driving gear 103, the base 4 is provided with a driving motor (not shown), the driving motor is connected with the first driving gear 103 to drive the rubber roller 102 to feed paper, the axial end part of the recovery roller 221 is provided with a second driving gear 81, a transmission gear assembly is arranged on the side frame 21 of the carbon belt frame 2, the first driving gear 103, the second driving gear 81 and the transmission gear assembly are positioned on the same side, the transmission gear assembly comprises a first transmission gear 821, a second transmission gear 822 and a locking transmission gear 823, the first driving gear 103, the first transmission gear 821, the second transmission gear 822 and the second driving gear 81 are sequentially meshed and connected from bottom to top, the transmission gear assembly is connected with the first driving gear 103 in a closed state of the carbon belt frame 2, and the motor drives the recovery roller 221 to rewind and rotate. The lock transmission gear 823 is connected with the second transmission gear 822, a lock tooth is arranged on an axial end face of the lock transmission gear 823, and the pitch of the lock tooth is larger than that of the lock transmission gear 823.

Referring to fig. 9 in conjunction with fig. 7 and 8, the thermal transfer printer further includes a locking member 25, a first elastic member 261, a plunger 27, and a second elastic member 262, the locking member 25 is disposed in an arc shape, the locking member 25 is provided with a hinge portion 252, a driving portion 253, and a locking hook portion 251, the hinge portion 252 and the locking hook portion 251 are respectively disposed at two ends, the driving portion 253 is disposed between the hinge portion 252 and the locking hook portion 251, the hinge portion 252 is disposed in a hinge hole, the locking hook portion 251 is disposed in a hook with an inclined surface, the driving portion 253 is a rod body disposed at a middle portion, the plunger 27 is provided with an upper end 271, a lower end 272, and a positioning convex edge 273, the positioning convex edge 273 is disposed between the upper end 271 and the lower end 272, the first elastic member 261 is disposed in a torsion spring, and the second elastic member 262 is disposed in a spring.

The side frame 21 of the carbon belt frame 2 is provided with a hinged column, the hinged part 252 is matched with the hinged column, the locking piece 25 is rotatably arranged on the carbon belt frame 2, the first elastic piece 261 is sleeved outside the hinged column, two ends of the first elastic piece 261 are respectively abutted against the locking piece 25 and the carbon belt frame, and the second elastic piece 262 is sleeved outside the upper end 271 and is positioned above the positioning convex edge 273. Be provided with constant head tank 217 on carbon tape frame 2's side bearer 21, constant head tank 217 is located one side of hinge post, constant head tank 217 runs through at the lower extreme and is provided with through-hole 218, ejector pin 27 is located constant head tank 217, ejector pin 27 is the movably setting on carbon tape frame 2 then, the lower extreme 272 of ejector pin 27 is worn out in through-hole 218, second elastic component 262 is located constant head tank 217, location protruding edge 273 borders on the inboard at through-hole 218, the spring butt is between the cell wall of location protruding edge 273 and constant head tank 217, the spring exerts the elastic force down for ejector pin 27.

When the carbon ribbon frame 2 is in a closed state, the lower end 272 of the ejector rod 27 is adjacent to the base 4, so that the ejector rod 27 moves upwards, the upper end 271 of the ejector rod 27 is adjacent to the driving part 253 and drives the driving part 253 to move upwards, the locking piece 25 rotates, the locking hook part 251 is separated from the locking teeth of the locking transmission gear 823, and then the motor can drive the rewinding rotation of the recovery roller 221.

In the open state of the carbon ribbon holder 2, the first transmission gear 821 is separated from the first driving gear 103, meanwhile, the lower end 272 of the ejector rod 27 is separated from the base 4, then under the action of the second elastic member 262 and the first elastic member 261, the ejector rod 27 moves downwards, the locking hook part 251 moves towards the locking tooth of the locking transmission gear 823, is clamped into the locking tooth and rotates and locks the locking transmission gear 823, and then rotation locking of the second driving gear 81 and the recovery roller 221 is realized, and the carbon ribbon on the recovery roller 221 is prevented from rotating.

Certainly outside this embodiment, to the locking of second drive gear 81 and recovery roller 221, can directly adopt the locking piece to carry out the screens locking to second drive gear, first drive gear, second drive gear, it directly carries out the locking to the gear also, need not through the locking tooth, perhaps directly adopt mobilizable locking piece again and directly to adjoin to the cooperation with the base, make the locking piece remove when the lid closes, make the locking piece with second drive gear or drive gear subassembly separation, make ground locking piece elasticity reset when uncapping and remove, then locking piece and second drive gear or drive gear subassembly block locking.

Referring to fig. 10 and 11 in combination with fig. 2 and 3, the base 4 is provided with cover fixing portions 42 on both sides of the rubber roller 102 in the paper width direction, and the cover fixing portions 42 are arranged in a fixed groove, the thermal transfer printer further includes two cover opening members 14, two latch hook members 15, a rotating shaft 16 and an elastic member, the rotating shaft 16 is rotatably provided on the inner side of the cover body 1, the two latch hook members 15 are respectively located on both sides of the thermal sensitive sheet 101 in the paper width direction, the two latch hook members 15 are also respectively located on both sides of the carbon ribbon holder, the latch hook members 15 are provided with connecting holes 151 at the upper portion, and the rotating shaft 16 is connected between the two connecting holes 151.

The latch hook member 15 is provided with hook portion 152 in the lower part, and latch hook member 15 is provided with drive plate 153 in the middle part, and drive plate 153 extends along the horizontal direction, and the elastic component is connected between latch hook member 15 and lid 1, and the elastic component can adopt the torsional spring, and the torsional spring cover is on the pivot, and the both ends of torsional spring butt respectively between latch hook member 15 and lid 1.

The lid 1 is provided with spacing punch combination respectively at the both sides wall of paper width direction, spacing punch combination includes upper limit slide opening 131, lower limit slide opening 132 and perforation 133, be provided with between upper limit slide opening 131 and the lower limit slide opening 132 and keep off wall 135, the outside of keeping off wall 135 is provided with mounting groove 134, upper limit slide opening 131 all extends along the horizontal direction with lower limit slide opening 132, perforation 133 is located between upper limit slide opening 131 and lower limit slide opening 132, upper limit slide opening 131 and perforation 133 intercommunication.

The opening cover 14 is provided with an upper hook 141, a lower hook 142 and a driving hook 143, the opening cover 14 is located at the outer side of the blocking wall 135, the upper hook 141 is clamped with the edge of the upper limiting slide hole 131, the lower hook 142 is clamped with the edge of the lower limiting slide hole 132, the upper hook 141 can slide along the upper limiting slide hole 131, the lower hook 142 can slide along the lower limiting slide hole 132, the driving plate 153 is located at the inner side of the blocking wall 135, the driving hook 143 passes through the through hole 133 to be clamped with the driving plate 153, the driving plate 153 is provided with a matching step 154, the matching step 154 is located at the end of the driving plate 153, the outer end clamping part of the driving hook 143 extends along the horizontal direction and extends towards the opposite direction to the driving plate, the driving hook 143 is located in the matching step 154, then the driving plate 153 is in clearance fit between the outer end clamping part of the driving hook 143 and the blocking wall 135, the driving hook 143 can move in the through hole 133 and drive the driving plate 153, the edge of the installation groove 134 is provided with a first positioning step, the edge of the opening cover part 14 is provided with a second positioning step, the cover part 14 is positioned in the mounting groove 134 and can move in the mounting groove 134, and the first positioning step is adjacent to the second positioning step.

Under closing the lid state, hook portion 152 closes fixed part 42 block with the lid, realizes then that the lid of lid and carbon ribbon frame closes the locking, and through stirring the lid piece 14 of opening of both sides, drives the rotation of locking hook spare 15, then hook portion 152 closes fixed part 42 with the lid and separates, alright realization uncapping.

Referring to fig. 12 to 15, the thermal printer is provided with two paper roll frames 3 at the paper bin 43, the two paper roll frames 3 are arranged along the paper width direction, the paper roll frame 3 is provided with a paper roll supporting portion 31 at the upper portion, the paper roll supporting portion 31 is arranged in a cylindrical shape and is used for being matched with a paper roll, the lower portion of the paper roll frame 3 is provided with two supporting columns 341 arranged along the vertical direction, the two supporting columns 341 are distributed along the paper width direction, one supporting column 341 is provided with one rotating member 342, the rotating shaft 16 of the rotating member 342 is arranged along the vertical direction, the rotating member 342 can be a rolling bearing, and the inner ring of the rolling bearing is arranged outside the supporting column 341.

The fixed lid 45 that is provided with in below of base 4, be provided with two rack 351 and gear 352 on the lid, two rack 351 meshes in the both sides of gear 352, and a paper roll frame 3 is connected with a rack 351, and a rack 351 is connected with base 4 through a spring, and then two rack 351 can be elasticity reset inwards, realize paper roll frame 3 elasticity reset inwards then, and the location centre gripping to the scroll.

The base 4 is provided with a first sliding groove 441 on the bottom wall of the paper bin 43, the first sliding groove 441 extends in the paper width direction, the two sides of the first sliding groove 441 in the horizontal direction are respectively provided with a matching side wall extending in the paper width direction, the rotating member 342 is located in the first sliding groove 441, and the outer ring of the rolling bearing is in rolling fit with the matching side wall. The paper roll holder 3 is provided with a handle groove 32, and the handle groove 32 is positioned above the rotating member 342.

The base 4 is provided with a second sliding groove 442 on the bottom wall of the paper bin 43, the second sliding groove 442 is located on one side of the first sliding groove 441 close to the hinge portion 11 of the cover, the second sliding groove 442 extends along the paper width direction, the lower portion of the paper roll frame 3 is provided with a positioning strip 351, the positioning strip 351 is located in the second sliding groove 442 and can move along the second sliding groove 442, and the positioning strip 351 and the second sliding groove 442 are in clearance fit.

The base 4 is provided with a third sliding groove 443 in the bottom wall of the paper compartment 43, the third sliding groove 443 is located on one side of the first sliding groove 441 close to the rubber roller, the third sliding groove 443 extends in the paper width direction, a limiting block 461 is arranged in the third sliding groove 443, a first tooth portion is arranged on the inner end surface of the third sliding groove 443 located above, the limiting block 461 is provided with a second tooth portion, the first tooth portion is adjacent to the second tooth portion, the limiting block 461 is provided with a positioning column 462, an elastic element 463 is sleeved outside the positioning column 462 and located in the third sliding groove 443, the cover 45 is provided with a positioning groove 451, one end of the elastic element 463 is adjacent to the limiting block 461, and the other end of the elastic element 463 is adjacent to the bottom wall of the positioning groove 451. The limiting block 461 can relatively and fixedly move along the third sliding slot 443, the limiting block 461 is located between the two paper roll frames 3, the positioning baffle 352 is disposed at the lower portion of one of the paper roll frames 3, and the limiting block 461 is adjacent to the positioning baffle 352 of the paper roll frame 3.

The paper roll holder 3 is provided with a paper clamping groove 334 at one side close to the rubber roller 102, the paper clamping groove 334 comprises an upper guide wall 333, a lower guide wall 332 and a guide side wall 331, the upper guide wall 333 is positioned above the lower guide wall 332 is positioned below the lower guide wall 331, the guide side wall 331 is positioned outside, the upper guide wall 333 and the lower guide wall 332 are respectively connected with the guide side wall 331, the upper guide wall 333 and the lower guide wall 332 are arranged at an acute included angle, a guide outlet is arranged at one side close to the rubber roller between the upper guide wall 333 and the lower guide wall 332, a paper penetrating opening is arranged between the upper guide wall 333 and the lower guide wall 332 in the paper width direction, the paper penetrating openings of the two paper roll holders 3 are arranged oppositely, and printing paper passes through the paper penetrating opening and is output from the guide outlet.

Referring to fig. 16 to 19 and with reference to fig. 12, the base 4 is provided with an adjusting chute 471 at a position close to the paper outlet 401, the adjusting chute 471 extends in the paper width direction, the adjusting chute 471 is located at a side close to the paper bin relative to the rubber roller 102, a limiting bottom wall 473 is arranged at the bottom of the adjusting chute 471, limiting side walls 472 are arranged at two sides of the limiting bottom wall 473 in the paper feeding direction, the limiting side walls 472 extend in the paper width direction, a through groove 474 is penetratingly arranged on the limiting bottom wall 473, the through groove 474 extends in the paper width direction, a first tooth 476 is arranged on the bottom surface of the limiting bottom wall 473 outside the adjusting chute 471, and the first tooth 476 extends in the paper width direction.

The thermal printer further comprises a paper detection assembly, the paper detection assembly comprises a sensing device 51, a mounting block 52, a clamping block 53 and an elastic piece 54, the sensing device 51 is mounted in the mounting block 52, the sensing device 51 comprises a substrate and an infrared sensor mounted on the substrate, detection infrared light of the infrared sensor can upwards penetrate through the mounting block 52, and position detection is carried out on printing paper of a paper feeding channel. The lower end of the mounting block 52 is provided with a positioning column 521, and the mounting block 52 is provided with a buckle 522 on both sides of the positioning column 521 in the paper width direction.

The clamping block 53 is provided with a clamping end surface 531, the clamping end surface 531 is provided with a plurality of second tooth portions 532, the clamping end surface 531 is provided with a through hole 535 in a penetrating manner, the clamping block 53 is provided with clamping side walls 533 on both sides of the clamping end surface 531, the clamping side walls 533 extend in the paper width direction, and the clamping blocks 53 are provided with clamping chutes 534 on both sides of the paper width direction.

The mounting block 52 is arranged in the adjusting sliding groove 471 and is adjacent to the limiting bottom wall 473, the mounting block 52 can move along the adjusting sliding groove 471, the clamping block 53 is located outside the adjusting sliding groove 471, the positioning column 521 passes through the penetrating groove 474 and the penetrating hole 535, the fixing part 55 is arranged at the outer end part of the positioning column 521, the elastic part 54 is a spring, the spring is sleeved outside the positioning column 521, the elastic part 54 is abutted between the fixing part 55 and the clamping block 53, the fixing part 55 is in threaded fit with a screw, and then the compression stroke and the elastic force of the spring can be adjusted. And the outer circumference of the penetration hole 535 is provided with a seating groove 536 at a side facing the fixing member 55, and one end of the spring is seated in the seating groove 536.

The clamping side wall 533 of both sides is located the outside of spacing side wall 472 respectively and with spacing side wall 472 clearance fit, buckle 522 passes trough 474 and the spacing cooperation of grip block 53, the post portion of buckle 522 is located centre gripping spout 534, the card portion of buckle 522 is located the below of centre gripping spout 534, then carry out the lower part spacing to the grip block, realize then that mount block 52 and grip block 53 carry out the centre gripping of spacing diapire 473, second tooth portion 532 and first tooth portion 476 elasticity butt, the mount block 52 can move relatively fixedly.

Of course, in addition to this embodiment, the position arrangement of the paper detection assembly and the adjustment chute may also be located on the side of the rubber roller close to the paper outlet, and the position of the printing paper may also be detected. The paper roll frame design scheme and the paper detection component design scheme are also applicable to thermal printers, namely bill and label printers adopting thermal printing paper, and the thermal printer is provided with two arrangement schemes of thermal sensitive sheets and rubber rollers, wherein one thermal sensitive sheet is arranged on a cover body and is arranged on a base, the other thermal sensitive sheet is arranged on the base and is arranged on the cover body, and the arrangement schemes are also in the protection range of the scheme.

It is from top to bottom visible, it is articulated with the base respectively through lid and carbon ribbon frame, and articulate between lid and carbon ribbon frame through the connecting rod, then utilize the base as the support, make lid and carbon ribbon frame linkage relatively independent, when opening the lid, the lid drives the carbon ribbon frame and rotates up and open, the user alright conveniently carries out carbon ribbon and printer change, when closed lid, the lid drives the carbon ribbon frame and rotates the closure down, then accomplish the lid of lid and carbon ribbon frame and close, the mode of connecting rod linkage improves convenient to use nature, also alleviate the rotational impact of lid and carbon ribbon frame, optimize user's use experience on the whole.

In addition, it is articulated with the base respectively through lid and carbon ribbon frame, utilize the base as the support, make lid and carbon ribbon frame rotate relatively independently, because carbon ribbon frame weight is heavier, so make the carbon ribbon frame slowly uncap through setting up gear damper, lighten the rotational shock of carbon ribbon frame, and directly adopt the gear groove to be connected with gear damper's gear when the assembly, realize simple and easy assembly and simplified structure, also make things convenient for in the change of carbon ribbon, optimize user's use experience on the whole.

Furthermore, because the carbon tape frame is along with the lid switching, therefore the drive division detachable through the locking piece adjoins with the base, then realize under carbon tape frame open mode, utilize the elasticity restoring force of elastic component and lock hook portion and second drive gear or drive gear subassembly block, then realize the rotation locking of recovery roller, under carbon tape frame closed mode, drive division adjoins with the base, drive division drive lock hook portion and second drive gear or drive gear subassembly separation, thereby relieve the locking, make second drive gear or drive gear subassembly can normal rotation function, utilize the rotation locking function of carbon tape, avoid the deflection of carbon tape, thereby guarantee the carbon tape and beat the level and smooth cooperation of beating printing paper, in order to improve printing quality and operating stability.

And, through upper and lower pothook respectively with upper and lower spacing slide opening block, rethread drive pothook passes perforation and drive plate block, makes then between drive plate, fender wall and the piece of uncapping all spacing ground clearance fit each other, and the piece of uncapping and locking hook remove under the limited circumstances, when avoiding the part not hard up, can realize stably uncapping and close the lid, also improves the operating stability of part simultaneously. In addition, the assembly stability of the cover opening part on the cover body is further improved through the positioning of the mounting groove and the positioning step. And, through last spacing slide opening and perforation intercommunication, it is more convenient when assembling spacing punch combination to open the lid then, avoids the screens assembly not in good order, is connected with the drive pothook through the cooperation step of drive plate moreover for drive pothook and cooperation step are when spacing cooperation, guarantee both when drive and removal, and the separation of not misplacing guarantees connection stability.

In addition, generally when pulling the scroll frame along the paper width direction transversely, can form the horizontal deformation of certain degree to the scroll frame, then through the rotation piece of winding vertical direction pivoted for rotate the piece and be located the cooperation lateral wall roll cooperation of horizontal one side, the friction that can significantly reduce, thereby make the scroll frame can smoothly remove along first spout, thereby it avoids the card to optimize to pull to feel, and it is more convenient when making the user erect the scroll.

Moreover, connect between installation piece and grip block through the elastic component, utilize second tooth portion and first tooth portion elasticity butt, then the installation piece not only can conveniently remove the regulation in adjusting the spout, and the tooth portion of elasticity butt promotes to adjust and feels, avoids removing the card and pause, and the mounting hole also the position relatively stable fixed to improve and detect position stability.

Claims (8)

1. A thermal transfer printer with a stable uncapped operation comprises a base, a cover body, a carbon belt frame, a carbon belt roller assembly, a rubber roller and a thermal sensitive sheet, wherein the cover body of the cover body is hinged to the base, the rubber roller is rotatably arranged on the base, the carbon belt frame is positioned in the cover body, the thermal sensitive sheet and the carbon belt roller assembly are arranged on the carbon belt frame, and the thermal sensitive sheet and the rubber roller are oppositely arranged;

the method is characterized in that:

the base is provided with cover fixing parts at two sides of the rubber roller in the paper width direction;

the thermal transfer printer further comprises two opening cover parts, two locking hook parts, a rotating shaft and an elastic part, wherein the rotating shaft is rotatably arranged on the cover body, the two locking hook parts are respectively positioned on two sides of the thermal sensitive sheet in the paper width direction, the upper parts of the locking hook parts are provided with connecting holes, the rotating shaft is connected between the two connecting holes, the lower parts of the locking hook parts are provided with hook parts, the hook parts are detachably clamped with the cover fixing parts, and the elastic part is connected between the locking hook parts and the cover body;

the middle part of the hook locking part is provided with a driving plate, two side walls of the cover body in the paper width direction are respectively provided with a limit hole group, the limit hole group comprises an upper limit sliding hole, a lower limit sliding hole and a through hole, a blocking wall is arranged between the upper limit sliding hole and the lower limit sliding hole, and the driving plate is positioned on the inner side of the blocking wall;

the opening cover part is provided with an upper clamping hook, a lower clamping hook and a driving clamping hook, the opening cover part is located on the outer side of the blocking wall, the upper clamping hook is clamped with the edge of the upper limiting sliding hole, the lower clamping hook is clamped with the edge of the lower limiting sliding hole, the driving clamping hook penetrates through the through hole and is clamped with the driving plate, the driving plate is in clearance fit between the outer end clamping part of the driving clamping hook and the blocking wall, and the driving clamping hook can move in the through hole and drive the driving plate to move.

2. The thermal transfer printer of claim 1, wherein:

the cover body is arranged on the outer side of the blocking wall and is provided with a mounting groove, and the opening cover is positioned in the mounting groove and can move in the mounting groove.

3. The thermal transfer printer of claim 2, wherein:

the edge of mounting groove is provided with first location step, the edge of opening the lid is provided with the second location step, first location step with the second location step borders on.

4. The thermal transfer printer of claim 1, wherein:

the upper limiting slide hole and the lower limiting slide hole extend along the horizontal direction, the upper clamping hook can slide along the upper limiting slide hole, and the lower clamping hook can slide along the lower limiting slide hole.

5. The thermal transfer printer of claim 4, wherein:

the through hole is positioned between the upper limiting slide hole and the lower limiting slide hole, and the upper limiting slide hole is communicated with the through hole.

6. The thermal transfer printer of claim 4, wherein:

the outer end clamping part of the driving clamping hook extends along the horizontal direction.

7. The thermal transfer printer according to any one of claims 1 to 6, wherein:

the driving plate is provided with a matching step, and the driving clamping hook is positioned in the matching step.

8. The thermal transfer printer of claim 7, wherein:

the drive plate extends in a horizontal direction, and the fitting step is located at an end of the drive plate.

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