CN111332025A

CN111332025A - Thermal printer

Info

Publication number: CN111332025A
Application number: CN202010269668.1A
Authority: CN
Inventors: 陈海; 汪发; 刘武
Original assignee: Shenzhen Elanda Commercial Equipment Co ltd
Current assignee: Shenzhen Elanda Commercial Equipment Co ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2020-06-26
Anticipated expiration: 2040-04-08
Also published as: CN111332025B

Abstract

The invention relates to the technical field of thermal printers, in particular to a thermal printer, which comprises an upper cover and an inner shell, wherein the rotating end of the upper cover is rotatably connected with the inner shell, the free end of the upper cover is rotatably connected with a rubber roller, a thermal sheet is arranged in the inner shell, when the free end of the upper cover is closed with the inner shell, the rubber roller is abutted against the side surface of the thermal sheet, a printing channel is formed between the rubber roller and the thermal sheet, the thermal printer also comprises a paper bin box for placing thermal paper, an accommodating cavity for installing the paper bin box, a cover opening device for separating the free end of the upper cover from the inner shell when detecting that the printing channel has no thermal paper, and a flip structure for turning the upper cover to the free end, keeping away from the inner shell and connecting the rotating end of the upper cover; the opening of the paper bin box faces the upper cover and is detachably fixed with the upper cover; when the upper cover is closed, the paper bin box is positioned in the accommodating cavity. The paper bin box can be ejected out in time after the thermal paper is printed, so that the rubber roller is separated from the thermal sheet, and the thermal sheet and the rubber roller are protected.

Description

Thermal printer

Technical Field

The invention relates to the technical field of thermal printers, in particular to a thermal printer.

Background

The invoice printer is also called a thermal printer, and the thermal printer is mainly used for printing transaction receipts, bills, labels and the like, so that the thermal printer is widely applied to the fields of retail industry, diet industry, logistics industry and the like, and due to the particularity of the industries, the use frequency of the thermal printer is far higher than that of a conventional commercial printer. At present, a semiconductor heating element is arranged on a printing head of the thermal printer, and the printing head can print required patterns after heating and contacting thermal paper, and the principle of the thermal printer is similar to that of a thermal fax machine. The image is generated by heating the thermal paper and causing a chemical reaction on the surface of the thermal paper. The chemical reaction of the thermal printer is carried out at a certain temperature, and the chemical reaction is accelerated by high temperature. When the temperature is lower than 60 ℃, the paper needs to be changed into dark color for a long time, even for several years; and when the temperature is 200 ℃, the reaction is completed within several microseconds.

The printing assembly of the existing thermal printer mainly comprises a thermal sensitive sheet and a rubber roller, and the replacement or addition of the paper roll is convenient to print, most thermal printers can set the printing assembly into a split structure at present, namely one of the thermal sensitive sheet and the rubber roller is installed on a shell, the other one is installed on a paper bin cover, so that the paper bin cover is opened, the thermal sensitive sheet is separated from the rubber roller, the paper bin cover is closed, the thermal sensitive sheet is attached to the rubber roller, a printing channel is formed, and the printing paper roll passes through the printing channel to perform image forming. In the printing process, the temperature of the thermal sensitive sheet can reach 200 ℃, after the thermal sensitive paper in the paper bin is used up, no paper is separated between the thermal sensitive sheet and the rubber roller, the surface of the rubber roller is easily melted by the thermal sensitive sheet, so that the rubber roller is damaged, and meanwhile, the thermal sensitive sheet is also stained with glue after the rubber roller is melted, so that the thermal sensitive sheet is damaged.

The above prior art solutions have the following drawbacks: although the thermal printer can display a paperless state, the prompt is not obvious enough, so that people often forget to replace the thermal paper, and the thermal sheet still generates a large amount of heat to heat and melt the rubber roller, so that the prior art needs to be improved.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a thermal printer, which can eject a paper bin box in time after thermal paper is printed, so that a rubber roller is separated from a thermal sheet, and the thermal sheet and the rubber roller are protected.

The above object of the present invention is achieved by the following means.

The utility model provides a thermal printer, includes upper cover and inner shell, the rotation end and the inner shell of upper cover rotate to be connected, the free end of upper cover rotates and is connected with the rubber roll, be provided with the heat-sensitive piece in the inner shell, when the free end of upper cover and inner shell were closed, the side butt of rubber roll and heat-sensitive piece, form between rubber roll and the heat-sensitive piece and print the passageway, still include:

the paper bin box is used for placing thermal paper, the opening of the paper bin box faces the upper cover, and the paper bin box and the upper cover are detachably fixed;

the containing cavity is used for installing the paper bin box, the containing cavity is arranged in the inner shell, and when the upper cover is closed, the paper bin box is positioned in the containing cavity;

the cover opening device is used for separating the free end of the upper cover from the inner shell when detecting that the printing channel has no thermal paper;

the flip structure is connected between the rotating end of the upper cover and the inner shell and used for turning the upper cover to the free end to be far away from the inner shell.

By adopting the technical scheme, the paper bin box and the inner shell are arranged in a separable manner, and the paper bin box and the upper cover are detachably fixed, so that the paper bin box moves along with the upper cover under the driving of the cover opening device and is separated from the accommodating cavity, and meanwhile, the rubber roller arranged on the upper cover is also separated from the thermosensitive sheet, so that the heating effect of the thermosensitive sheet on the rubber roller is blocked, the thermosensitive sheet is not easy to damage the rubber roller, and meanwhile, the thermosensitive sheet is not easy to collect and pollute; the paper bin box is separated from the inner shell, and the upper cover drives the paper bin box to leave the inner shell, so that a relatively obvious prompting effect can be achieved, and people can be reminded of replacing the thermal sensitive paper in time.

The present invention in a preferred example may be further configured to: the cap opening device includes:

the rubber roll clamping device comprises a turnover plate, locking plates are fixed at two ends of the turnover plate, a clamping hook for clamping a rubber roll is arranged on each locking plate, the two locking plates are arranged in parallel, mounting holes are formed in the two locking plates, the two mounting holes are coaxially arranged, a rotating shaft penetrates through the two mounting holes, the rotating shaft is circumferentially and fixedly connected with the mounting holes, and two ends of the rotating shaft are rotatably connected with an inner shell;

the rotating arm is used for driving the turnover plate to turn over so as to realize that the locking plate releases the rubber roller; the rotating arm comprises a linkage block fixed with the rotating shaft, a limiting pin is arranged on the linkage block, a fan-shaped hole for providing a rotating space for the limiting pin is formed in the inner shell, and the limiting pin penetrates through the fan-shaped hole;

the driving assembly is connected with the rotating arm and used for driving the rotating arm to rotate so as to release the rubber roller;

the position sensor is used for detecting light rays passing through the printing channel; the position sensor is electrically connected with the driving assembly to drive the driving assembly to release the rubber roller.

Through adopting above-mentioned technical scheme, position sensor can detect whether have the temperature sensing paper in the printing passageway, and position sensor can be with signal transmission to drive assembly, when not having the temperature sensing paper in the printing passageway, means not having or being about to use up the temperature sensing paper in the paper storehouse box, and the rocking arm can rotate under drive assembly's drive this moment for the returning face plate drives the locking plate at both ends simultaneously with the rubber roll separation, makes the rubber roll change by the release.

The present invention in a preferred example may be further configured to: the drive assembly includes electric jar and travel switch, the electric jar rotates with the inner shell to be connected, the output and the linkage piece of electric jar are articulated, travel switch installs in the inner shell outside and is located the rocking arm and keeps away from the one end of electric jar, be provided with the response end on the output of electric jar, be provided with the transmission conductor that is used for communicateing the response end of electric jar and travel switch on the rocking arm, the output of electric jar switches on back reverse motion with travel switch.

By adopting the technical scheme, when the position sensor transmits a signal without the thermosensitive paper in the printing channel to the electric cylinder, the output end of the electric cylinder pushes the linkage block to rotate, so that the switch device releases the rubber roller; at the moment, the linkage block rotates to be in contact with the travel switch, the travel switch is communicated with the electric cylinder through a transmission conductor on the rotating arm, and the electric cylinder can pull the linkage block to restore the original state, so that the function of automatically restoring the original state of the switching device can be realized.

The present invention in a preferred example may be further configured to: the linkage block is connected with a rotating block for driving the turnover plate to turn over; the rotating block is sunken towards the inner shell to form a pressing groove.

Through adopting above-mentioned technical scheme, can realize that the manual work presses down the groove and realizes that the rocking arm drives the upset of returning face plate, realize the function that manual control opened the upper cover.

The present invention in a preferred example may be further configured to: one side of the paper bin box, which is close to the rotating end of the upper cover, is rotatably connected with the upper cover; the side edges of the upper cover adjacent to the rubber roller are provided with magnet strips, and the side surfaces of the paper bin box adjacent to the rotating end are also provided with ferromagnetic strips used for attracting the magnet strips.

Through adopting above-mentioned technical scheme, ferromagnetic strip and magnet strip inter attraction realize the relatively fixed of upper cover and paper storehouse box to can part paper storehouse box and upper cover under the effect of external force, realize the fixed function dismantled of upper cover and paper storehouse box, the mode of fixed and split is convenient.

The present invention in a preferred example may be further configured to: the flip structure comprises a hinge leg integrally connected with the upper cover, a support plate, a torsion spring and a connecting rod, wherein the support plate, the torsion spring and the connecting rod are arranged in parallel with the side surface of the inner shell, hinge holes, via holes and through holes are respectively and coaxially arranged on the hinge leg, the inner shell and the support plate, the connecting rod penetrates through the hinge holes, the via holes and the through holes, one end, penetrating out of the hinge holes, of the connecting rod is provided with a limiting end, one end, penetrating out of the through holes, of the connecting rod is provided with an eccentric plate, the free end of the eccentric plate is provided with a limiting arm, one end of the limiting; the torsional spring cover is established on the connecting rod to the both ends of torsional spring respectively with backup pad, eccentric plate butt, the upper spring foot and the upper cover joint of torsional spring are fixed, the lower spring foot butt of torsional spring is on spacing arm.

Through adopting above-mentioned technical scheme, realize the elastic connection between upper cover and the inner shell through the torsional spring for the rubber roll of upper cover is from switching device release back, and the upper cover can be bounced open under the effort that the torsional spring resumes deformation, makes the free end of upper cover keep away from the inner shell.

The present invention in a preferred example may be further configured to: the upper cover and the paper bin box are rotatably connected through a hinge structure; the hinge structure comprises a box part hinge lug integrally connected with the paper bin box and a cover body hinge lug integrally connected with the upper cover, and a hinge rod penetrates between the box part hinge lug and the cover body hinge lug.

Through adopting above-mentioned technical scheme, upper cover and paper storehouse box can realize through hinge structure that it is simple and convenient to rotate to connect articulated mode.

The present invention in a preferred example may be further configured to: the bottom in holding chamber is provided with the arc spring leaf that is used for popping out the paper storehouse box holding chamber, the bottom of paper storehouse box is provided with the loss prevention gasket that is used for with arc spring leaf looks butt.

By adopting the technical scheme, when the rubber roller is hooked with the switching device, the bottom of the paper bin box compresses the arc-shaped spring piece; when the rubber roll is released from the switch device, the paper bin box does not press the arc-shaped spring piece any more, so the arc-shaped spring piece needs to restore the deformation, the arc-shaped spring piece converts elastic potential energy into kinetic energy in the process, the paper bin box is popped out of the accommodating cavity, and the upper cover is convenient for moving the paper bin box to separate from the inner shell.

The present invention in a preferred example may be further configured to: and a paper transfer port for transferring thermal paper is formed in one side surface of the paper bin box corresponding to the rubber roll.

Through adopting above-mentioned technical scheme, pass the paper mouth and be convenient for thermal paper conveying to printing the passageway for the conveying of thermal paper is more smooth.

The present invention in a preferred example may be further configured to: the upper cover is provided with a transparent observation window for observing the residual quantity of the thermal paper.

Through adopting above-mentioned technical scheme, transparent observation window is convenient for the staff can in time observe the surplus quantity of thermal paper in the paper storehouse box.

In summary, the invention includes at least one of the following beneficial technical effects:

the paper bin box can be ejected out in time after the thermal sensitive paper is printed, so that the rubber roller is separated from the thermal sensitive sheet, and the thermal sensitive sheet and the rubber roller are protected;

the paper bin box can be detached from the inner shell, and can be popped out of the accommodating cavity along with the upper cover, so that the thermal printer can give a stronger feedback when the thermal paper is used up, and people can be reminded to replace the thermal paper in time;

the paper bin box and the upper cover are detachably fixed, so that the paper core of the thermal paper is not easy to pop out of the paper bin box when the thermal paper is popped out, and the ground is not easy to pollute.

Drawings

Fig. 1 is a schematic view of an overall structure of a thermal printer according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of an upper cover opening of a thermal printer according to an embodiment of the present invention.

Fig. 3 is a schematic structural view of a connection between a paper storage box and an upper cover according to an embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a thermal printer forming a printing channel according to an embodiment of the present invention.

Fig. 5 is a schematic structural diagram of an accommodating chamber in a thermal printer according to an embodiment of the present invention.

Fig. 6 is a schematic structural view of a rotating arm according to an embodiment of the present invention.

Fig. 7 is a schematic structural diagram of an inner casing for thermal printing according to an embodiment of the present invention.

In the figure, 001, the housing; 002. pressing the hole; 1. an upper cover; 11. a transparent viewing window; 12. a magnet bar; 13. the cover body is hinged with the lug; 2. a rubber roller; 3. an inner shell; 301. an accommodating cavity; 302. opening a hole; 303. a sector hole; 304. a via hole; 31. an arc-shaped spring piece; 32. a heat-sensitive sheet; 4. a paper cartridge; 401. a paper transfer port; 42. a loss-prevention gasket; 43. a ferromagnetic strip; 44. a box part hinge lug; 5. a cap opening device; 51. a turnover plate; 52. a locking plate; 521. mounting holes; 522. a hook; 523. a circular hole; 53. a rotating shaft; 54. a rotating arm; 541. a linkage block; 542. a spacing pin; 543. rotating the block; 544. pressing the groove; 545. a transfer conductor; 6. a drive assembly; 61. an electric cylinder; 62. a travel switch; 7. a position sensor; 8. a flip structure; 81. a hinged leg; 811. a hinge hole; 82. a support plate; 821. perforating; 83. a torsion spring; 831. a spring foot; 832. a lower spring foot; 84. a connecting rod; 841. a limiting end; 842. an eccentric plate; 843. a limiting arm; 9. a hinge structure; 91. a hinged lever.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, the thermal printer provided by the invention comprises an upper cover 1, an outer shell 001 and an inner shell 3, wherein the inner shell 3 is located inside the outer shell 001, and a rotating end of the upper cover 1 is rotatably connected with the inner shell 3, further, the upper cover 1 is connected with the inner shell 3 through a flip structure 8, so that a free end of the upper cover 1 can be turned from a position close to the inner shell 3 to a position where the free end is far away from the inner shell 3.

Specifically, the above-described flip structure 8 includes a hinge leg 81, a support plate 82, a torsion spring 83, and a connection rod 84. Wherein the hinge legs 81 are integrally connected with the upper cover 1, the hinge legs 81 are disposed at both sides of the free end in the upper cover 1, and hinge holes 811 are provided in the two hinge legs 81, and the two hinge holes 811 are coaxially disposed. The support plate 82 is integrally connected to the inner case 3, and the side surfaces of the support plate 82 are parallel to the inner wall of the inner case 3. The inner casing 3 and the support plate 82 are coaxially provided with a through hole 304 and a through hole 821, respectively, and the connecting rod 84 is inserted through the hinge hole 811, the through hole 304 and the through hole 821. One end of the connecting rod 84 penetrating through the hinge hole 811 is integrally connected with a limiting end 841, and the limiting end 841 is positioned at the outer side of the inner shell 3. The end of the connecting rod 84 penetrating through the through hole 821 is integrally connected with an eccentric plate 842, the free end of the eccentric plate 842 is integrally formed with a limiting arm 843, the length direction of the limiting arm 843 is perpendicular to the eccentric plate 842, and the limiting arm 843 faces the inner shell 3 from the eccentric plate 842. The torsion spring 83 is sleeved on the connecting rod 84, two ends of the torsion spring 83 are respectively abutted against the supporting plate 82 and the eccentric plate 842, an upper spring foot 831 of the torsion spring 83 is clamped and fixed with the upper cover 1, and a lower spring foot 832 of the torsion spring 83 is perpendicular to the limiting arm 843.

Referring to fig. 3, further, one side of the paper bin box 4 close to the rotating end of the upper cover 1 is rotatably connected with the upper cover 1; the side edges of the upper cover 1 adjacent to the rubber roller 2 are provided with magnet strips 12, and the side surface of the paper bin box 4 adjacent to the rotating end is also provided with ferromagnetic strips 43 used for attracting the magnet strips 12 mutually.

Referring to fig. 4, the free end of the upper cover 1 is rotatably connected with a rubber roller 2, a heat sensitive sheet 32 is arranged in the inner shell 3, when the free end of the upper cover 1 is closed with the inner shell 3, the rubber roller 2 is abutted against the side surface of the heat sensitive sheet 32, and a printing channel is formed between the rubber roller 2 and the heat sensitive sheet 32. Since the above is the prior art, the description is not repeated in this embodiment.

Referring to fig. 5, an accommodating cavity 301 is formed in the inner shell 3, a paper bin box 4 is arranged in the accommodating cavity 301, and when the upper cover 1 is closed, the paper bin box 4 is located in the accommodating cavity 301; wherein the paper bin box 4 is used for placing thermal paper. The opening of the paper bin box 4 faces the upper cover 1, the paper bin box 4 and the upper cover 1 are detachably fixed, and the paper bin cover and the upper cover 1 can be in any one of clamping fit, threaded connection or hinged fixation.

Referring to fig. 3, further, the upper cover 1 and the paper cartridge 4 are rotatably connected by a hinge structure 9. In particular, the hinge structure 9 comprises a box portion hinge lug 44 and a cover portion hinge lug 13. Wherein the box part hinge lug 44 is integrally connected with the paper bin box 4, the cover body hinge lug 13 is integrally connected with the upper cover 1, and a hinge rod 91 penetrates between the box part hinge lug 44 and the cover body hinge lug 13. Therefore, the above-described magazine 4 can be rotated with respect to the upper cover 1.

Referring to fig. 4, the upper cover 1 and the inner shell 3 are connected through a cover opening device 5, and the cover opening device 5 can detect whether the printing channel has thermal paper or not; when detecting that the printing passage is free of the thermal paper, the cap opening device 5 can separate the free end of the upper cap 1 from the inner case 3.

Specifically, the uncapping device 5 includes a flipping panel 51, a rotating arm 54, a driving assembly 6, and a position sensor 7.

The two ends of the turning plate 51 are fixedly provided with locking plates 52, one sides of the two locking plates 52 are integrally connected with the turning plate 51, the two locking plates 52 are oppositely arranged and are parallel to each other, one ends of the two locking plates 52 are flush with one side edge of the turning plate 51, the other ends of the two locking plates 52 protrude out of the turning plate 51 and are provided with hooks 522, the hooks 522 are arranged towards the turning plate 51, and the hooks 522 are used for clamping two ends of the rubber roller 2; the two locking plates 52 are provided with mounting holes 521 at the ends far away from the hooks 522, and the two mounting holes 521 are coaxially arranged. The turning plate 51 is arranged on the inner side of the inner shell 3, the locking plate 52 faces the rubber roller 2, two opposite side surfaces of the inner shell 3 are provided with openings 302, a rotating shaft 53 penetrates through the two mounting holes 521, and the rotating shaft 53 is circumferentially and fixedly connected with the mounting holes 521; two ends of the rotating shaft 53 respectively penetrate through the opening 302 and are rotatably connected with the opening 302; the flipping panel 51 can thus be rotatably connected with respect to the inner shell 3.

When the upper cover 1 is closed, two adjacent sides of the free end of the upper cover 1 are tightly attached to the inner shell 3, and two ends of the rubber roller 2 of the upper cover 1 are hooked with the hooks 522. When the turning plate 51 rotates towards one side of the rubber roller 2, the hook 522 is released from the rubber roller 2, so that the locking plate 52 releases the rubber roller 2, and the free end of the upper cover 1 is far away from the inner shell 3.

Referring to fig. 6 and 7, the rotating arm 54 is used for driving the turning plate 51 to turn so as to release the rubber roller 2 by the locking plate 52. Specifically, the swivel arm 54 is disposed on a side of the inner casing 3 facing away from the flipping plate 51, and is circumferentially fixed to the rotation shaft 53. The rotating arm 54 includes a linking block 541, a limiting pin 542 integrally formed on the linking block 541, a sector hole 303 formed on the inner shell 3, the sector hole 303 being located above the opening 302, and the limiting pin 542 on the linking block 541 being located in the sector hole 303 (not shown in the figure), when the limiting flipping plate 51 is flipped, the limiting pin 542 moves from one side of the sector hole 303 to the other side of the sector hole 303. The scallops 303 have the effect of limiting the flip angle of the flipping panel 51. Further, a round hole 523 is formed in the locking plate 52, the limit pin 542 is in clearance fit with the round hole 523, and when the rotating arm 54 rotates, the limit pin 542 and the rotating shaft 53 drive the locking plate 52 to rotate at the same time.

Further, the rotating arm 54 further includes a rotating block 543, and the rotating block 543 is integrally connected with the linkage block 541. The rotating block 543 is arranged on one side of the inner shell 3 far away from the turnover plate 51; further, the rotary block 543 is recessed toward the inner case 3 to form a pressing groove 544. Correspondingly, the housing 001 is provided with a pressing hole 002 at the position of the rotary block 543. When the pressing groove 544 is pressed down through the pressing hole 002, the linkage block 541 is driven to rotate, so as to drive the turnover plate 51 to rotate, and the function of releasing the rubber roller 2 by the locking plate 52 or driving the locking plate 52 to return to the original position is realized.

Referring to fig. 4 and 7, the driving assembly 6 includes an electric cylinder 61 and a stroke switch 62, the electric cylinder 61 is rotatably connected to the outside of the inner housing 3, in this embodiment, the electric cylinder 61 is disposed on one side of the rotating arm 54 close to the linkage block 541, the output end of the electric cylinder 61 is hinged to the linkage block 541, and a sensing end is disposed on the output end of the electric cylinder 61, the stroke switch 62 is mounted on the outside of the inner housing 3 and located at one end of the rotating block 543 away from the electric cylinder 61, and the stroke switch 62 is spaced from the rotating arm 54 in the original position, and when the rotating arm 54 rotates to the position at the other side of the sector hole 303, the stroke switch 62 just contacts with the rotating block 543; the rotating arm 54 is provided with a transmission conductor 545, and the transmission conductor 545 is used for communicating the sensing end of the electric cylinder 61 with the travel switch 62; further, the transmission conductor 545 may be any one of a wire and a conductive sheet, and in this embodiment, the conductive sheet extends from the end of the rotation block 543 that may contact the stroke switch 62 to the end of the linkage block 541 hinged to the electric cylinder 61 along the upper side of the rotation arm 54. When the automatic resetting device works, the output end of the electric cylinder 61 extends to push the rotating arm 54 to rotate, the rotating arm 54 drives the overturning plate 51 to rotate so that the hook 522 releases the rubber roller 2, after the rotating arm 54 is contacted with the travel switch 62, the travel switch 62 transmits a signal to the induction end of the electric cylinder 61 through the transmission conductor 545, the electric cylinder 61 moves reversely after receiving the signal, the linkage block 541 is pulled to restore the original position, and the automatic resetting function of the overturning plate 51 is realized.

Referring to fig. 2 and 4, the position sensor 7 is disposed outside the inner casing 3 and faces the printing channel, and is configured to detect whether there is no thermal paper in the printing channel, and when there is no thermal paper in the printing channel, the position sensor 7 can send a detection signal to the electric cylinder 61, so that after the electric cylinder 61 obtains the detection signal, the output end of the electric cylinder 61 is extended to drive the rotating arm 54 to rotate, thereby driving the turning plate 51 to rotate, so as to enable the hook 522 to release the rubber roller 2, and the thermal sheet 32 does not heat the rubber roller 2 any more.

Specifically, in the present embodiment, the position sensor 7 is an infrared sensor, and the infrared sensor can release detection light, detect that the light passes through the printing channel, and monitor the condition of the printing channel in real time; the infrared sensor is electrically connected with the electric cylinder 61 to drive the assembly 6 to release the rubber roller 2.

Referring to fig. 3 and 5, further, an arc-shaped spring leaf 31 for ejecting the paper bin box 4 out of the accommodating cavity 301 is disposed at the bottom of the accommodating cavity 301, and a damage-preventing gasket 42 for abutting against the arc-shaped spring leaf 31 is disposed at the bottom of the paper bin box 4. When the rubber roller 2 is hooked with the switch device, the bottom of the paper bin box 4 compresses the arc-shaped spring piece 31; when the rubber roller 2 is released from the switch device, the paper bin box 4 does not press the arc-shaped spring piece 31 any more, so the arc-shaped spring piece 31 is to restore the deformation, the arc-shaped spring piece 31 converts the elastic potential energy into the kinetic energy in the process, the paper bin box 4 is ejected out of the accommodating cavity 301, and the upper cover 1 is convenient to drive the paper bin box 4 to be separated from the inner shell 3.

One side surface of the paper bin box 4 corresponding to the rubber roller 2 is provided with a paper transfer port 401 for transferring thermal paper. The thermal paper is conveyed from the paper conveying port 401 to the printing passage, so that the conveyance of the thermal paper is smoother.

The upper cover 1 is provided with a transparent observation window 11 for observing the remaining amount of the thermal paper. The transparent observation window 11 is convenient for the staff to observe the remaining amount of the thermal paper in the paper bin 4 in time, and the remaining amount of the thermal paper can be displayed more intuitively.

The implementation principle of the above embodiment is as follows: the position sensor 7 monitors the printing channel in real time, when no thermal paper exists in the printing channel, the position sensor 7 transmits a detection signal to the electric cylinder 61, the output end of the electric cylinder 61 is hinged with the rotating arm 54, when the electric cylinder 61 pushes the rotating arm 54 to rotate, the turnover plate 51 also drives the locking plate 52 to rotate, so that the hook 522 is separated from the rubber roller 2, and after the rubber roller 2 is released, the torsion spring 83 drives the upper cover 1 to bounce, so that the free end of the upper cover 1 is far away from the inner shell 3; the upper cover 1 drives the paper bin box 4 to be separated from the accommodating cavity 301; after the rotating arm 54 rotates to be in contact with the travel switch 62, the travel switch 62 transmits a signal to the electric cylinder 61, the output end of the electric cylinder 61 retracts after receiving the signal, and the rotating arm 54 is pulled to rotate until the overturning plate 51 returns to the original position. The invention has the advantages that the paper bin box 4 is ejected out in time after the thermal paper is printed, so that the rubber roller 2 is separated from the thermal sheet 32, and the thermal sheet 32 and the rubber roller 2 are protected.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. The utility model provides a thermal printer, includes upper cover (1) and inner shell (3), the rotation end and the inner shell (3) of upper cover (1) are rotated and are connected, the free end of upper cover (1) is rotated and is connected with rubber roll (2), be provided with heat-sensitive piece (32) in inner shell (3), when the free end of upper cover (1) and inner shell (3) were closed, the side butt of rubber roll (2) and heat-sensitive piece (32), form between rubber roll (2) and the heat-sensitive piece (32) and print the passageway, its characterized in that: further comprising:

the paper bin box (4) is used for placing thermal paper, the opening of the paper bin box (4) faces the upper cover (1), and the paper bin box (4) and the upper cover (1) are detachably fixed;

the accommodating cavity (301) is used for installing the paper bin box (4), the accommodating cavity (301) is arranged in the inner shell (3), and when the upper cover (1) is closed, the paper bin box (4) is located in the accommodating cavity (301);

the cover opening device (5) is used for separating the free end of the upper cover (1) from the inner shell (3) when detecting that the printing channel has no thermal paper;

the flip structure (8) is connected between the rotating end of the upper cover (1) and the inner shell (3) and used for turning the upper cover (1) to the free end to be far away from the inner shell (3).

2. A thermal printer according to claim 1, wherein: the cap opening device (5) includes:

the rubber roller clamping device comprises a turnover plate (51), locking plates (52) are fixed at two ends of the turnover plate (51), a clamping hook (522) used for clamping a rubber roller (2) is arranged on each locking plate (52), the two locking plates (52) are arranged in parallel, mounting holes (521) are formed in the two locking plates (52), the two mounting holes (521) are coaxially arranged, a rotating shaft (53) penetrates through the two mounting holes (521), the rotating shaft (53) is circumferentially fixedly connected with the mounting holes, and two ends of the rotating shaft (53) are rotatably connected with an inner shell (3);

the rotating arm (54) is used for driving the overturning plate (51) to overturn so as to release the rubber roller (2) by the locking plate (52); the rotating arm (54) comprises a linkage block (541) fixed with the rotating shaft (53), a limiting pin (542) is arranged on the linkage block (541), a fan-shaped hole (303) providing a rotating space for the limiting pin (542) is formed in the inner shell (3), and the limiting pin (542) penetrates through the fan-shaped hole (303);

the driving assembly (6), the said driving assembly (6) is connected with tumbler (54), is used for driving the tumbler (54) to rotate in order to release the rubber roller (2);

a position sensor (7), wherein the detection light of the position sensor (7) passes through the printing channel; the position sensor (7) is electrically connected with the driving component (6) so that the driving component (6) releases the rubber roller (2).

3. A thermal printer according to claim 2, wherein: the driving assembly (6) comprises an electric cylinder (61) and a travel switch (62), the electric cylinder (61) is rotatably connected with the inner shell (3), the output end of the electric cylinder (61) is hinged to the linkage block (541), the travel switch (62) is installed on the outer side of the inner shell (3) and located at one end, far away from the electric cylinder (61), of the rotating arm (54), an induction end is arranged at the output end of the electric cylinder (61), a transmission conductor (545) used for communicating the induction end of the electric cylinder (61) and the travel switch (62) is arranged on the rotating arm (54), and the output end of the electric cylinder (61) and the travel switch (62) conduct and then move reversely.

4. A thermal printer according to claim 2, wherein: the linkage block (541) is connected with a rotating block (543) for driving the turnover plate (51) to turn over; the rotating block (543) is recessed towards the inner shell (3) to form a pressing groove (544).

5. A thermal printer according to claim 1, wherein: one side of the paper bin box (4) close to the rotating end of the upper cover (1) is rotatably connected with the upper cover (1); the side edges of the upper cover (1) adjacent to the rubber roller (2) are provided with magnet strips (12), and the side surfaces of the paper bin box (4) adjacent to the rotating end are also provided with ferromagnetic strips (43) used for attracting the magnet strips (12) mutually.

6. The thermal printer according to claim 5, wherein: the flip structure (8) comprises a hinge leg (81) integrally connected with the upper cover (1), a support plate (82) arranged in parallel with the side surface of the inner shell (3), a torsion spring (83) and a connecting rod (84), hinge holes (811), through holes (304) and through holes (821) are coaxially arranged on the hinge legs (81), the inner shell (3) and the support plate (82) respectively, the connecting rod (84) penetrates through the hinge hole (811), the through hole (304) and the through hole (821), one end of the connecting rod (84) penetrating through the hinge hole (811) is provided with a limit end (841), one end of the connecting rod (84) penetrating through the through hole (821) is provided with an eccentric plate (842), a limiting arm (843) is arranged at the free end of the eccentric plate (842), one end of the limiting arm (843) faces the inner shell (3), the length direction of the limiting arm (843) is vertical to the eccentric plate (842); the connecting rod (84) is sleeved with the torsion spring (83), two ends of the torsion spring (83) are respectively abutted to the supporting plate (82) and the eccentric plate (842), an upper spring foot (831) of the torsion spring (83) is fixedly connected with the upper cover (1) in a clamping mode, and a lower spring foot (832) of the torsion spring (83) is abutted to the limiting arm (843).

7. The thermal printer according to claim 5, wherein: the upper cover (1) is rotatably connected with the paper bin box (4) through a hinge structure (9); hinge structure (9) include box portion hinge lug (44) and lid hinge lug (13) with upper cover (1) body coupling with paper storehouse box (4) body coupling, it has hinge lever (91) to run through between box portion hinge lug (44) and lid hinge lug (13).

8. A thermal printer according to claim 1, wherein: the bottom in holding chamber (301) is provided with arc spring leaf (31) that are used for popping out holding chamber (301) with silo box (4), the bottom of silo box (4) is provided with and is used for loss prevention gasket (42) with arc spring leaf (31) looks butt.

9. A thermal printer according to claim 1, wherein: one side surface of the paper bin box (4) corresponding to the rubber roller (2) is provided with a paper transfer port (401) for transferring thermal paper.

10. A thermal printer according to claim 1, wherein: the upper cover (1) is provided with a transparent observation window (11) for observing the residual quantity of the thermal paper.