CN112339445A

CN112339445A - Thermal printer

Info

Publication number: CN112339445A
Application number: CN202011275554.4A
Authority: CN
Inventors: 罗磊; 申小丹
Original assignee: Zhuhai Xinye Electronic Technology Co Ltd; Zhuhai Hengsheng Barcode Equipment Co Ltd
Current assignee: Zhuhai Xinye Electronic Technology Co Ltd; Zhuhai Hengsheng Barcode Equipment Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-02-09
Anticipated expiration: 2040-11-16
Also published as: CN112339445B

Abstract

The invention relates to the technical field of printers, and discloses a thermal printer which comprises an upper cover and a lower cover, wherein the left end of the upper cover and the left end of the lower cover are hinged with each other, a rubber roller is arranged at the upper end of the lower cover, the rubber roller axially extends along the left-right direction, a thermal sensitive sheet is arranged at the position of the upper cover corresponding to the rubber roller, a paper width adjusting mechanism is also arranged at the upper end of the lower cover, the paper width adjusting mechanism comprises two sliding blocks which are arranged on the lower cover in a left-right sliding manner, a paper inlet and a paper outlet are arranged between the upper cover and the lower cover, and the paper inlet and the paper outlet are respectively arranged at the front end and the. The hinged part of the upper cover and the lower cover falls on the axial direction of the rubber roller, and is separated from a printing paper transmission path of the rubber roller without mutual interference, when the upper cover and the lower cover are opened, the paper inlet and the printing paper transmission path are opened, the paper inlet is an open space, paper is conveniently loaded, and the position of printing paper is conveniently adjusted; the distance between the two sliding blocks can be limited by moving the sliding blocks, so that the width of printing paper is limited, and the printing paper is convenient to use.

Description

Thermal printer

Technical Field

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

Background

Now, thermal printer's use is more and more common, and a lot of printers are external hanging paper storehouse, and after changing the scroll, need will beat printing paper and fill in the printer from paper feed mouth, and in the printer of present, upper cover and lower cover articulated department are located the paper feed route of beating printing paper, and the paper feed mouth just sets up in upper cover and lower cover articulated position, and the paper feed mouth is too little, and inconvenient dress paper also is convenient for adjust the position of beating printing paper.

Disclosure of Invention

To overcome the above-mentioned deficiencies of the prior art, the present invention provides a thermal printer, which in one aspect solves the problem of a printer with a small paper feed port.

The technical scheme adopted by the invention for solving the technical problems is as follows:

the utility model provides a thermal printer, includes upper cover and lower cover, the left end of upper cover and the left end of lower cover are articulated each other, the upper end of lower cover is equipped with the rubber roll, the rubber roll axial is followed left right direction and is extended, the corresponding rubber roll position department of upper cover is equipped with the heat-sensitive piece, the upper end of lower cover still is equipped with paper width adjustment mechanism, paper width adjustment mechanism sets up in two sliders of lower cover including sliding from side to side, be equipped with paper feed mouth and exit slot between upper cover and the lower cover, the front end and the rear end of printer are located respectively to paper feed mouth and exit slot.

As an improvement of the technical proposal, the upper cover is provided with a paper feeding groove at the paper feeding port, a paper feeding roller is rotatably arranged in the paper feeding groove, the axial direction of the paper feeding roller and the axial direction of the rubber roller are mutually parallel, the paper feeding roller is provided with a plurality of convex rings along the axial direction, a gap is arranged between every two adjacent convex rings, the upper cover is provided with an inclined convex plate and a flat convex plate, the inclined convex plate and the flat convex plate are positioned between the paper feeding port and the heat-sensitive sheet, the lower cover is provided with a flat concave plate and an inclined concave plate at corresponding positions, the flat concave plate and the inclined concave plate are positioned between the paper inlet and the rubber roller, a paper feeding channel is formed between the inclined convex plate and the flat convex plate as well as between the flat concave plate and the inclined concave plate, the height of the paper feeding channel is reduced from front to back, the inclined convex plate, the flat concave plate and the inclined concave plate are all provided with a plurality of convex edges, a gap is reserved between every two adjacent convex edges, and the length direction of each convex edge is the same as the paper feeding direction.

As an improvement of the above technical solution, an elastic member is disposed at a left end of the upper cover, one end of the elastic member is movable to be away from or close to the upper cover, a concave portion is disposed at a position corresponding to a left end of the lower cover, a maximum distance from one end of the elastic member to a rotational connection position of the upper cover and the lower cover is greater than a minimum distance from a lower side wall of the concave portion to the rotational connection position of the upper cover and the lower cover in a natural state, and when the upper cover is opened by a predetermined angle relative to the lower cover, one end of the elastic member is located in the concave portion.

As an improvement of the technical proposal, the elastic piece is a first elastic piece, the left end of the upper cover is provided with a curved plate, the first curved surface end of the curved plate is connected with the left end of the upper cover, the other end of the first elastic sheet is connected with the second curved surface end of the curved plate, a curved plate avoiding groove is correspondingly arranged inside the left end of the lower cover, a second elastic sheet is arranged on the right side wall of the curved plate avoiding groove, the concave part is positioned in the middle of the second elastic sheet, the concave part is a strip-shaped groove extending forwards and backwards, the lower part of the second elastic sheet is provided with a strip-shaped convex part, the convex part is positioned at the lower side of the concave part, and the convex part and the concave part share a side wall surface, the inclined surface is arranged on the side wall surface shared by the convex part and the concave part, the maximum distance from one end of the first elastic sheet to the rotary joint of the upper cover and the lower cover is greater than the minimum distance from the convex part to the rotary joint of the upper cover and the lower cover.

As an improvement of the technical proposal, the two ends of the rubber roller are sleeved with shaft sleeves, the lower cover is provided with a rubber roller groove, the rubber roller is arranged in the rubber roller groove, the two ends of the rubber roller groove are respectively provided with a fixed groove and an auxiliary mounting groove, the two ends of the fixing groove are respectively communicated with the rubber roller groove and the auxiliary mounting groove, the shaft sleeve is positioned in the fixing groove, a contraction opening is arranged on the circumference of the fixing groove, an avoiding plane and a positioning cambered surface are arranged on the side surface of the shaft sleeve, the shaft sleeve is arranged in the fixed groove in a mode that the avoiding plane passes through the contraction opening, the positioning cambered surface is contacted with the inner wall of the fixed groove, the side wall of the shaft sleeve is provided with a positioning strip, the positioning strip is positioned in the auxiliary mounting groove, one side of the positioning strip is provided with a convex column, the side wall of the auxiliary mounting groove is provided with a groove, the convex column is inserted into the groove, the positioning strip is provided with a handle, and the handle protrudes out of the positioning strip.

As an improvement of the above technical scheme, the improved thermosensitive device further comprises a thermosensitive support, the thermosensitive plate is installed on the thermosensitive support, the thermosensitive groove is opened at the rear end of the upper cover, the thermosensitive support is installed in the thermosensitive groove, the spring is installed at the bottom of the thermosensitive groove, the lower end of the spring can abut against the thermosensitive support, the slot is opened on the front side wall of the thermosensitive groove, the insertion sheet is arranged on the front side of the thermosensitive support, the insertion sheet can be inserted into the slot, the front part of the left side wall of the thermosensitive groove and the front part of the right side wall of the thermosensitive groove are both provided with a stop block, the front part of the left side and the front part of the right side of the thermosensitive support are both.

As an improvement of the above technical solution, the upper cover is provided with a limiting block, the limiting block is located in front of the slot, and the limiting block covers part or all of the lower portion of the slot when viewed from the front-back direction of the upper cover.

As an improvement of the above technical scheme, the right-hand member of upper cover and the right-hand member of lower cover are equipped with the subassembly of uncapping and print switch subassembly respectively, the subassembly of uncapping includes pothook and reset spring, pothook and upper cover are connected respectively to reset spring's both ends, the pothook includes hook portion, print switch subassembly is including the micro-gap switch main part of locating the lower cover and locating the switch arm in the micro-gap switch main part, the lower cover is equipped with the hook groove, a part or whole of switch arm are located the hook groove, work as upper cover and lower cover lid close, hook portion gets into the hook groove under reset spring's effect, just hook portion butt switch arm.

As the improvement of above-mentioned technical scheme, the lower cover is equipped with switch mounting groove, switch mounting groove is located the side of hook groove, switch mounting groove and hook groove intercommunication, the micro-gap switch main part is located in the switch mounting groove, the hook groove includes hook groove body and locates the switch arm in hook groove body one side and dodges the groove, hook groove body can hold hook portion, the switch arm dodges the trench and is located between switch mounting groove and the hook groove, the switch arm dodges adjacent both sides in groove respectively with hook groove and switch mounting groove intercommunication, work as hook portion is located the hook groove body, the switch arm is located the switch arm and dodges the groove, works as hook portion breaks away from the hook groove, the switch arm is located the hook groove body.

As the improvement of the technical scheme, the lower cover comprises a lower shell, a lower inner cover and a dustproof cover arranged between the lower shell and the lower inner cover, the rubber roller and the paper width adjusting mechanism are both arranged on the lower inner cover, the sensor is also arranged on the lower inner cover, the circuit board is arranged at the lower end of the dustproof cover, and the rubber roller and the sensor are both connected with the circuit board through wires.

The beneficial effects of one aspect of the invention are as follows:

according to one aspect of the disclosure, the hinged part of the upper cover and the lower cover in the thermal printer falls on the axial direction of the rubber roller, and is separated from the printing paper transmission path of the rubber roller without mutual interference, when the upper cover and the lower cover are opened, the paper inlet and the printing paper transmission path are opened, the paper inlet is an open space, the paper is conveniently loaded, and the position of the printing paper is conveniently adjusted; and moreover, the distance between the two sliders can be limited by moving the sliders, so that the width of printing paper is limited, and the printing paper is convenient to use.

Drawings

The invention is further described with reference to the following detailed description of embodiments and drawings, in which:

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

FIG. 2 is an exploded view of a portion of the upper cover according to one embodiment of the present invention;

fig. 3 is a partially enlarged view of a portion a in fig. 2.

FIG. 4 is a perspective view of a portion of the upper inner cover in one embodiment of the present invention;

FIG. 5 is a perspective view of a portion of the lower inner cap in one embodiment of the present invention;

FIG. 6 is a schematic view of a partial cross-sectional structure of an embodiment of the present invention with the upper and lower covers opened at a predetermined angle;

fig. 7 is a partially enlarged view at B in fig. 6.

FIG. 8 is a perspective view of a portion of the lower cover of one embodiment of the present invention;

FIG. 9 is an enlarged view of a portion of FIG. 8 at C;

FIG. 10 is a schematic perspective view of a rubber roller mounting structure according to one embodiment of the invention;

FIG. 11 is a schematic perspective view of the lower inner cap of one embodiment of the present invention;

FIG. 12 is an enlarged view of a portion of FIG. 11 at D;

fig. 13 is a perspective view of a bushing in accordance with one embodiment of the present invention.

FIG. 14 is a schematic diagram of a partially exploded configuration of the upper cover in one embodiment of the present invention;

fig. 15 is a partial enlarged view at E in fig. 14;

FIG. 16 is a schematic cross-sectional view of a heat sensitive bracket during installation into a heat sensitive recess in accordance with one embodiment of the present invention;

FIG. 17 is a schematic cross-sectional view of a heat sensitive bracket installed in a heat sensitive recess in one embodiment of the invention.

Figure 18 is an exploded view of a door release assembly in one embodiment of the invention;

fig. 19 is an exploded view of a print switch assembly in one embodiment of the invention.

FIG. 20 is a schematic perspective view of the lower inner lid and dust cap of one embodiment of the present invention with the lower ends facing upward;

fig. 21 is a partially enlarged view at F in fig. 20.

Detailed Description

Referring to fig. 1-3, the invention discloses a thermal printer, which comprises an upper cover 1 and a lower cover 2, wherein the left end of the upper cover 1 and the left end of the lower cover 2 are hinged to each other, a rubber roller 3 is arranged at the upper end of the lower cover 2, the rubber roller 3 axially extends along the left-right direction, a thermal sensitive sheet 4 is arranged at the position of the upper cover 1 corresponding to the rubber roller 3, a paper width adjusting mechanism 210 is further arranged at the upper end of the lower cover 2, the paper width adjusting mechanism 210 comprises two sliders 2101 arranged on the lower cover 2 in a left-right sliding manner, a paper inlet and a paper outlet are arranged between the upper cover 1 and the lower cover 2, and the paper inlet and the paper outlet are respectively arranged at the front end and the rear end of the printer. Of course, in the thermal printer, the rubber roller 3 may be attached to the upper cover 1, and the thermal sheet 4 may be attached to the lower cover 2. These directions of the upper, lower, left, right, front, and rear are referred to herein as the states when the upper cover 1 and the lower cover 2 are closed.

Specifically, the hinged part of the upper cover 1 and the lower cover 2 in the thermal printer falls on the axial direction of the rubber roller 3, and is separated from a printing paper transmission path of the rubber roller 3 without mutual interference, when the upper cover 1 and the lower cover 2 are opened, a paper inlet and the printing paper transmission path are opened, the paper inlet is an open space, paper is conveniently loaded, and the position of printing paper is conveniently adjusted; moreover, the distance between the two sliders 2101 can be limited by moving the sliders 2101, so that the width of printing paper is limited, and the printing paper is convenient to use.

Further, upper cover 1 is equipped with paper feed groove 13 in the paper feed mouth, rotationally be equipped with paper feed roller 5 in paper feed groove 13, paper feed roller 5's axial and rubber roll 3's axial are parallel to each other, paper feed roller 5 is equipped with a plurality of bulge loops 51 along the axial, adjacent two it is gapped between the bulge loop 51, all be equipped with many beads 24 on upper cover 1 and the lower cover 2, many beads 24 on the upper cover 1 are located between paper feed mouth and the heat-sensitive sheet 4, many beads 24 on the lower cover 2 are located between paper feed mouth and the rubber roll 3, adjacent two it is gapped between the bead 24, the length direction and the paper feed direction syntropy of bead 24.

Thus, because the paper inlet is provided with the paper inlet roller 5, the printing medium is fed into the printer along the rolling of the paper inlet roller 5, the sliding friction between the printing medium and the printer shell during the existing paper feeding is converted into the rolling friction between the printing medium and the paper inlet roller 5, and the friction force is greatly reduced; and the convex ring 51 on the paper feeding roller 5 reduces the contact area of the printing medium and the paper feeding roller 5, and further reduces the friction force between the printing medium and the paper feeding roller; the convex edges 24 arranged on the upper cover 1 and the lower cover 2 ensure that the printing medium can not directly contact the printer shell in a large area, and greatly reduce the contact area between the printing medium and the printer shell, thereby greatly reducing the friction force between the printing medium and the printer shell; through these structures that reduce frictional force, frictional force when having alleviateed the paper feed has greatly produced the influence to the printing medium, has improved printing quality, has also reduced the damage of frictional force to the printer shell, guarantees the printing stability and the life of printer, simple structure, and is practical reliable.

Referring to fig. 3 again, two supporting sheets 132 are disposed in the paper feeding slot 13, the supporting sheets 132 are provided with mounting holes 133, a roller shaft 53 is disposed between the two supporting sheets 132, two ends of the roller shaft 53 are respectively inserted into the two mounting holes 133, a third shaft hole 52 is disposed in the center of the paper feeding roller 5, the roller shaft 53 is disposed in the third shaft hole 52, and the paper feeding roller 5 can rotate around the roller shaft 53.

Specifically, the roller shaft 53 includes the main shaft section 531 and locates the installation shaft section 532 at the main shaft section 531 both ends, the diameter of installation shaft section 532 is less than the diameter of main shaft section 531, the mounting hole 133 is the arch hole, the installation shaft section 532 corresponds to the arch axle, the diameter of mounting hole 133 is greater than the diameter of installation shaft section 532 and is less than the diameter of main shaft section 531, the installation shaft section 532 is inserted and is located the mounting hole 133, and the roller shaft 53 just can not rotate relative to the backing sheet 132 like this, and this kind of locking mode is reliable and stable, simple structure.

Further, the upper cover 1 includes an upper housing 11 and an upper inner cover 12 disposed in the upper housing 11, the supporting sheet 132 is vertically disposed on the upper housing 11, the paper feeding slot 13 is disposed on the upper inner cover 12, two first engaging grooves 131 are disposed at the bottom of the paper feeding slot 13, and the supporting sheet 132 is disposed through the first engaging grooves 131. The width of the first engaging groove 131 is greater than the width of the supporting piece 132, and a gap is formed between the side wall of the supporting piece 132 and the side wall of the first engaging groove 131. The supporting piece 132 has certain elasticity, and a certain movement margin is provided between the first engaging groove 131 and the supporting piece 132, so that the roller shaft 53 can be installed in the installation hole 133 only by slightly breaking the supporting piece 132 outwards, otherwise, the roller shaft 53 can be detached, the paper feeding roller 5 is sleeved on the roller shaft 53, that is, the installation and detachment method of the paper feeding roller 5 is simple, and the paper feeding roller 5 is convenient to assemble and replace.

In this embodiment, the protruding ring 51 includes a first ring arranged on the outer wall of the paper feeding roller 5 and a second ring arranged on the outer wall of the first ring, the cross section of the first ring is rectangular, the cross section of the second ring is trapezoidal, and the width of the top surface of the second ring is smaller than that of the first ring, so that the friction area between the printing medium and the top surface of the protruding ring 51 can be reduced as much as possible, friction is reduced, and the influence of paper feeding on the printing medium is reduced.

Specifically, the upper cover 1 is provided with an inclined convex plate 121 and a flat convex plate 122, the lower cover 2 is provided with a flat concave plate 222 and an inclined concave plate 221 at corresponding positions, the inclined convex plate 121, the flat convex plate 122, the flat concave plate 222 and the inclined concave plate 221 are all provided with a plurality of convex edges 24, the convex height of the front end of the inclined convex plate 121 is smaller than the convex height of the rear end, the flat convex plate 122 is arranged at the rear side of the inclined convex plate 121, that is, the convex height of the inclined convex plate 121 at the end close to the paper feeding port is smaller than the convex height of the inclined convex plate 121 at the end close to the heat-sensitive sheet 4, and the flat convex plate 122 is arranged at the side of the inclined convex plate 121 close to the rubber roller 3; the concave depth of the front end of the inclined concave plate 221 is greater than that of the rear end, the flat concave plate 222 is arranged on the front side of the inclined concave plate 221, that is, the concave depth of the inclined concave plate 221 close to the paper inlet end is greater than that of the inclined convex plate 121 close to the rubber roller 3, the flat concave plate 222 is arranged on one side of the inclined concave plate 221 close to the paper inlet, a paper feeding channel is formed between the inclined convex plate 121 and the flat convex plate 122 and between the flat concave plate 222 and the inclined concave plate 221, the height of the paper feeding channel is in a reduction state from the front to the rear, namely, the height of the paper feeding channel is in a reduction state from the paper inlet to the rubber roller 3. The height of the paper feeding channel at the paper inlet is larger so as to facilitate paper feeding and reduce friction between the paper feeding channel and a printing medium, and the height of the paper feeding channel at the rubber roller 3 is smaller so as to keep the printing medium smooth when the printing medium passes through the rubber roller 3 for printing, so that the printing quality is improved. Here, the state when the upper cover 1 and the lower cover 2 are closed is taken as a reference.

Referring to fig. 4-7, the left end of the upper cover 1 is provided with an elastic member 14, one end of the elastic member 14 is movable to be far away from or close to the upper cover 1, a concave portion 26 is provided at a corresponding position of the left end of the lower cover 2, the maximum distance from one end of the elastic member 14 to a rotary joint of the upper cover 1 and the lower cover 2 is greater than the minimum distance from the lower side wall of the concave portion 26 to the rotary joint of the upper cover 1 and the lower cover 2 in the natural state of the elastic member 14, and when the upper cover 1 is opened by a predetermined angle relative to the lower cover 2, one end of the elastic member 14 is located in the concave portion 26.

Specifically, after the printer is uncapped, that is, after the upper cover 1 is opened by a predetermined angle relative to the lower cover 2, one end of the elastic member 14 moves rightward, so that one end of the elastic member 14 extends into the concave portion 26, and the upper cover 1 and the lower cover 2 are relatively fixed; therefore, when the upper cover 1 or the lower cover 2 is touched lightly, the elastic piece 14 supports the upper cover 1 because one end of the elastic piece 14 is arranged in the concave part 26, the upper cover 1 and the lower cover 2 cannot rotate relatively, the risk that the upper cover 1 or the lower cover 2 rotates and falls to injure a user is avoided, and the structure is simple, stable and reliable, and the application range is wide.

Further, when the upper cover 1 opened by a predetermined angle is rotated downward relative to the lower cover 2, the lower side of one end of the elastic member 14 contacts with the lower side wall surface of the concave portion 26, the lower side of the elastic member 14 is provided with an arc surface 141, and the lower side wall surface of the concave portion 26 is correspondingly provided with a slope 261. When the printer needs to close the cover, a user rotates the upper cover 1 with force, one end of the elastic member 14 abuts against the lower side of the concave portion 26, and the side wall of the concave portion 26 reacts to one end of the elastic member 14, so that one end of the elastic member 14 moves leftwards until one end of the elastic member 14 is separated from the groove, and the upper cover 1 can rotate relative to the lower cover 2 to close the cover. The design of the arc surface 141 and the inclined surface 261 is convenient for a user to smoothly slide one end of the elastic member 14 out of the concave portion 26 when the user operates the printer cover.

Referring to fig. 4, the elastic member 14 is a first elastic sheet, the left end of the upper cover 1 is provided with a curved plate 15, the curved plate 15 is arched, two curved extending ends of the curved plate 15 are respectively a first curved end and a second curved end, both the two curved extending ends of the curved plate 15 are length ends, the length extending direction of the curved plate 15 is a front-back direction, the side of the curved plate 15 close to the curvature center is an inner curved side, the side of the curved plate 15 away from the curvature center is an outer curved side, the first curved end of the curved plate 15 is connected with the left end of the upper cover 1, the other end of the first elastic sheet is connected with the second curved end of the curved plate 15, the inner curved side of the curved plate 15 is provided with a connecting portion 151, the connecting portion 151 is connected with the lower cover 2 through a first rotating shaft 16, a curved plate avoiding groove 25 is arranged inside the left end of the lower cover 2, the concave portion 26 is arranged on the right side wall of the curved plate avoiding groove 25, when the upper cover 1 and the lower cover 2 are closed, the curved plate 15 is positioned in the curved plate avoiding groove 25, when the upper cover 1 is opened by a predetermined angle relative to the lower cover 2, the second curved end of the curved plate 15 is positioned in the curved plate avoiding groove 25.

Further, a first buffering through groove 152 is formed between each of two sides of the first elastic sheet and the curved plate 15, the length direction of the first buffering through groove 152 is perpendicular to the axial direction of the first rotating shaft 16, the arc surface 141 is arranged on the outer curved surface side of one end of the first elastic sheet, and the notch 142 is arranged at one end of the first elastic sheet. The first buffering through groove 152 separates the first elastic sheet from the curved plate 15, and has the functions of reducing the rigidity of the first elastic sheet, increasing the elasticity of the first elastic sheet, and facilitating the popping and compression of one end of the first elastic sheet when the cover is opened and closed. The function of the slot 142 is to reduce the contact area between one end of the first elastic sheet and the second elastic sheet 251, so as to reduce the friction force between the two, and facilitate the smooth closing of the cover.

Referring to fig. 5, a second elastic sheet 251 is disposed at the left end of the lower cover 2, the second elastic sheet 251 is a portion of the right sidewall of the curved plate avoidance groove 25, the upper end of the second elastic sheet 251 is connected to the lower cover 2, and the concave portion 26 is located in the middle of the second elastic sheet 251. The concave part 26 is a strip-shaped groove extending back and forth, a strip-shaped convex part 252 is arranged at the lower part of the second elastic sheet 251, the convex part 252 is positioned at the lower side of the concave part 26, the convex part 252 and the concave part 26 share a common side wall surface, the inclined surface 261 is arranged on the side wall surface shared by the convex part 252 and the concave part 26, and the maximum distance from one end of the first elastic sheet to the rotary joint of the upper cover 1 and the lower cover 2 is greater than the minimum distance from the convex part 252 to the rotary joint of the upper cover 1 and the lower cover 2. The concave portion 26 and the convex portion 252 form a hook to hook the first elastic sheet. A second buffer through groove 253 is arranged between the two sides of the second elastic sheet 251 and the lower cover 2. The second buffering through groove 253 divides the second elastic sheet 251 from the main body of the side wall of the curved plate avoiding groove 25, and has the functions of reducing the rigidity of the second elastic sheet 251, increasing the elasticity of the second elastic sheet 251 and facilitating the entry and extrusion of one end of the first elastic sheet into the concave part 26 when the cover is opened or closed.

In this embodiment, there are two connecting portions 151, two connecting portions 151 are respectively disposed at two length ends of the curved plate 15, that is, two connecting portions 151 are respectively disposed at the front end and the rear end of the curved plate 15, two partition plates 153 are further disposed on the inner curved surface side of the curved plate 15, the first elastic sheet and the two first buffer through grooves 152 are both located between the two partition plates 153, and the wire passing grooves 154 are formed between the partition plates 153 and the connecting portions 151. The wire between upper cover 1 and the lower cover 2 can be followed and passed through in the wire casing 154, crosses the wire casing 154 space big and the position is secret, and the wire is placed in easy to assemble, and the printer is opening the lid and the in-process that closes the lid because the second curved surface end of curved plate 15 all is arranged in the curved plate and dodges groove 25 always, therefore the wire can not expose, avoids the wire to be damaged, and is more pleasing to the eye.

Further, the right side of the curved plate avoiding groove 25 comprises a second elastic sheet 251 located in the center and side supporting sheets 254 located on two sides of the second elastic sheet 251, the right side of the side supporting sheets 254 is provided with an avoiding inclined surface 255, so that when the upper cover 1 and the lower cover 2 rotate relatively, the curved plate avoiding groove 25 cuts and scratches the second curved surface end of the curved plate 15. And when the upper cover 1 is opened by a predetermined angle, there is only a slight gap between the second curved end of the curved plate 15 and the escape slope 255.

Specifically, two front and back both ends of curved plate 15 are sealed to two connecting portion 151, and the first curved surface end of curved plate 15 is connected with upper cover 1, and the second curved surface end of curved plate 15 all lies in the curved plate and dodges groove 25 always, and like this, at 1 pivoted in-process of upper cover, the curved plate dodges groove 25 and is sealed by curved plate 15 and connecting portion 151 always, avoids uncapping the back foreign matter and falls into the curved plate and dodges groove 25, compact structure, and is practical simple and easy convenient.

In addition, one end of the partition 153 is provided with a rotation shaft avoiding groove 155, the connecting portion 151 and the partition 153 are both provided with a casing avoiding groove 156, and the casing avoiding groove 156 and the first elastic piece are respectively located at two sides of the first rotation shaft 16. The partition 153 can reinforce the strength of the curved plate 15 and prevent the wires from slipping out of the wire passing grooves 154.

Referring to fig. 8-13 in particular, the bushings 6 are sleeved at both ends of the rubber roller 3, the lower cover 2 is provided with a rubber roller groove 223, the rubber roller 3 is arranged in the rubber roller groove 223, the fixing groove 224 and the auxiliary mounting groove 225 are arranged at both ends of the rubber roller groove 223, both ends of the fixing groove 224 are respectively communicated with the rubber roller groove 223 and the auxiliary mounting groove 225, the bushings 6 are located in the fixing grooves 224, a contraction opening 2241 is arranged in the circumferential direction of the fixing grooves 224, the contraction opening 2241 is arranged at the upper side of the fixing grooves 224, the side surface of the bushings 6 is provided with an avoiding plane 61 and a positioning arc surface 62, the bushings 6 are installed in the fixing grooves 224 by the way of the avoiding plane 61 passing through the contraction opening 2241, the positioning arc surface 62 contacts the inner wall of the fixing grooves 224, the side wall of the bushings 6 is provided with the positioning bars 63, the positioning bars 63 are located in the auxiliary mounting, the side wall of the auxiliary mounting groove 225 is provided with a groove 2251, the protruding column 64 is inserted into the groove 2251, the positioning bar 63 is provided with a handle 65, and the handle 65 protrudes out of the positioning bar 63.

Further, when the rubber roller 3 in the thermal printer needs to be detached, the handle 65 on the shaft sleeve 6 can be directly pulled to separate the convex column 64 on the positioning strip 63 from the groove 2251, then the shaft sleeve 6 is rotated through the handle 65, the shaft sleeve 6 and the rubber roller 3 can pass through the contraction opening 2241 when the shaft sleeve 6 and the rubber roller are rotated to the avoiding plane 61, and at this time, the shaft sleeve 6 and the rubber roller 3 can be detached from the fixing groove 224 and the rubber roller groove 223 together; the order of installation of the rubber rollers 3 is opposite to that of installation. The rubber roller of the printer can be detached without the help of tools, is simple and convenient, can greatly improve the detaching speed of the rubber roller 3, and meets the detaching requirement anytime and anywhere.

Also, a handle escape groove 226 is provided at a side wall of the auxiliary mounting groove 225, and a part or the whole of the handle 65 is positioned in the handle escape groove 226.

Referring to fig. 13, the handle 65 includes an intermediate section 66 connected to the positioning strip 63 and a handle block 67 connected to the intermediate section 66, the intermediate section 66 and the positioning strip 63 are on the same plane when viewed in the radial direction of the rubber roller 3, the handle block 67 and the boss 64 protrude from the intermediate section 66 and the positioning strip 63, respectively, and the handle block 67 is buckled in the handle avoiding groove 226.

Specifically, the middle section 66 and the positioning strip 63 form an L-shape when viewed from the axial direction of the rubber roller 3, the middle section 66 and the handle block 67 form an L-shape when viewed from the radial direction of the rubber roller 3, and the handle block 67 and the convex column 64 are located on the same side of the positioning strip 63.

Referring to fig. 10 to 12, the sidewalls of the auxiliary installation groove 225 include a first sidewall 2253 and a second sidewall 2252 respectively disposed at both sides of the fixing groove 224, the handle escape groove 226 is formed at an upper end of the first sidewall 2253, the first sidewall 2253 is formed with a stopper groove 2254, the stopper groove 2254 is formed in the auxiliary installation groove 225, the positioning bar 63 is formed in the stopper groove 2254, and the groove 2251 is formed in the sidewall of the stopper groove 2254.

Also, the thickness of the first sidewall 2253 where the stopper groove 2254 is formed is smaller than that of the second sidewall 2252. Thus, if the sleeve 6 rotates in the fixing groove 224 in the opposite direction, the positioning bar 63 will touch the second sidewall 2252 and will not rotate, so that the sleeve 6 will not rotate in the wrong direction and cannot be installed.

Further, the shaft sleeve 6 includes a second limit ring 69 and a shaft sleeve body 68 connected with one end of the second limit ring 69, the avoiding plane 61, the positioning arc surface 62 and the positioning bar 63 are all disposed on the shaft sleeve body 68, the shaft sleeve body 68 is located in the fixing groove 224, the second limit ring 69 is located in the glue roller groove 223, and the end surface of the second limit ring 69 contacts the end surface of the glue roller groove 223. The second limit ring 69 is used for limiting the position of the rubber roller 3 and preventing the rubber roller 3 from axially moving. The second stop collar 69 has a notch 613 along the axial direction.

Referring specifically to fig. 13, the width of the avoiding plane 61 of the bushing 6 is smaller than the width of the positioning arc surface 62, so that the avoiding plane 61 can pass through the contraction opening 2241 and the positioning arc surface 62 cannot pass through the contraction opening 2241 during installation.

In this embodiment, the avoidance plane 61 and the positioning arc surface 62 are both provided with two, the avoidance plane 61 is arranged oppositely, the positioning arc surface 62 is arranged oppositely, and the positioning strip 63 is arranged on one of the positioning arc surfaces 62. The positioning arc surface 62 is an arc surface, the distance between the two avoiding planes 61 is smaller than the diameter of the positioning arc surface 62 and larger than the width of the contraction opening 2241, the fixing groove 224 is an arc groove, and the diameter of the fixing groove 224 is larger than that of the positioning arc surface 62.

Further, the other end of the second limit ring 69 is provided with a spacer 610, and the spacer 610 is located in the rubber roller groove 223. The shaft sleeve 6 is of an integrally formed structure, the shaft sleeve 6 is provided with a fourth shaft hole 611, a second through groove 612 is radially formed in the inner wall of the fourth shaft hole 611, and the end portion of the rubber roller 3 is inserted into the fourth shaft hole 611. The design of the second through groove 612 can facilitate the smooth rotation of the rubber roller 3 in the fourth shaft hole 611.

Referring to fig. 14-17, the printer further includes a thermal sensitive support 7, the thermal sensitive sheet 4 is mounted on the thermal sensitive support 7, the rear end of the upper cover 1 is provided with a thermal sensitive groove 17, the thermal sensitive support 7 is mounted in the thermal sensitive groove 17, the bottom of the thermal sensitive groove 17 is provided with a spring 10, the lower end of the spring 10 can be abutted to the thermal sensitive support 7, the front side wall of the thermal sensitive groove 17 is provided with a slot 18, the front side of the thermal sensitive support 7 is provided with an insertion sheet 72, the insertion sheet 72 can be inserted into the slot 18, the front part of the left side wall and the front part of the right side wall of the thermal sensitive groove 17 are both provided with a stopper 19, the front part of the left side and the front part of the right side of the thermal sensitive support 7 are both.

Like this, adopt the form of inserted sheet 72 and slot 18 combination and dog 19 and lug 73 combination to carry out the locking of temperature sensing support 7, when installing temperature sensing support 7, only need insert sheet 72 insert slot 18, press temperature sensing support 7 on spring 10, push away the lug 73 to the top of dog 19 again, just accomplished the installation step, and temperature sensing support 7 can move down automatically under the spring action of spring 10, can be until lug 73 upper end butt dog 19, temperature sensing support 7 is installed promptly, reverse operation is the dismantlement step promptly, can dismantle without the instrument, it is simple and convenient to dismantle, can accomplish the dismouting fast, can not destroy and also need not dismantle other structures, efficiency is greatly improved. Moreover, after the heat-sensitive support 7 is installed, the inserting piece 72 is hidden inside the upper cover 1, so that the structure is compact, the locking is stable and reliable, and the practicability is high.

Further, the upper cover 1 is provided with a limiting block 110, the limiting block 110 is located in front of the slot 18, and when viewed from the front-back direction of the upper cover 1, the limiting block 110 covers part or all of the lower portion of the slot 18. After the heat-sensitive support 7 is installed, the inserting sheet 72 is pushed against the lower part of the slot 18 under the action of the elastic force of the spring 10, and the design of the limiting block 110 can prevent the heat-sensitive support 7 from moving forwards and being misplaced, so that the locking of the heat-sensitive support 7 is safer and more reliable.

In this embodiment, the slot 18 is provided with two, two the front side wall of heat-sensitive recess 17 is arranged on one left and one right of slot 18, inserted sheet 72 and stopper 110 correspond and all are provided with two. The two inserting pieces 72 are inserted into the two inserting grooves 18 from left to right, so that the balance of the thermosensitive support 7 is facilitated.

Further, the stopper 19 is a 7-shaped stopper, the stopper 19 includes a horizontal stopper 191 and a vertical stopper 192 disposed at an upper end of the horizontal stopper 191, and the vertical stopper 192 is connected to a rear portion of the horizontal stopper 191. After the heat-sensitive support 7 is installed, the lower end of the bump 73 is abutted to the upper end of the horizontal stopper 191, and the vertical stopper 192 can limit the bump 73, so that the heat-sensitive support 7 is prevented from moving backwards, and the locking position is more accurate.

Moreover, the left and right side walls of the heat sensitive groove 17 are provided with first through grooves 171, and the first through grooves 171 are located on the upper side of the stopper 19. The first through groove 171 allows a larger mounting space for the bump 73 above the stopper 19, which facilitates the disassembling and assembling operation.

Referring to fig. 15 and 16, the upper end surface of the heat sensitive bracket 7 is provided with a salient point 71, and the lower end of the spring 10 can be sleeved on the salient point 71. The bottom of the heat-sensitive groove 17 is provided with a cross column 172 and a first limit ring 173, the cross column 172 is located in the first limit ring 173, a gap is formed between the cross column 172 and the first limit ring 173, and the upper end of the spring 10 is inserted between the cross column 172 and the first limit ring 173. The salient points 71, the cross columns 172 and the first limit rings 173 are designed to accurately position the spring 10 and ensure the direction of the elastic force of the spring 10.

Referring to fig. 18 and 19, an uncovering assembly and a printing switch assembly are respectively arranged on the upper cover 1 and the lower cover 2, the uncovering assembly comprises a hook 8 and a return spring 113, two ends of the return spring 113 are respectively connected with the hook 8 and the upper cover 1, the hook 8 comprises a hook main body 81 hinged to the upper cover 1 and a hook 82 arranged at one end of the hook main body 81, the printing switch assembly comprises a micro switch main body 9 arranged on the lower cover 2 and a switch arm 92 arranged on the micro switch main body 9, the lower cover 2 is provided with a hook groove 27, a part or all of the switch arm 92 is arranged in the hook groove 27, when the upper cover 1 and the lower cover 2 are closed, the hook 82 enters the hook groove 27 under the action of the return spring 113, and the hook 82 abuts against the switch arm 92.

Thus, when the upper cover 1 and the lower cover 2 of the printer are closed, the hook 82 enters the hook groove 27 under the reset action of the reset spring 113, and at this time, the printer is already closed, and because a part or all of the switch arm 92 is positioned in the hook groove 27, the hook 82 abuts against and touches the switch arm 92 in the process of entering the hook groove 27, so that the microswitch main body 9 is closed; when the printer is turned on, the hook 82 is retracted from the hook groove 27, the switch arm 92 is automatically reset, and the microswitch body 9 is turned off. The switch contact and the cover opening hook in the existing design are combined into a whole, the processes of controlling the printing switch and opening the cover are combined into a whole, the printer is not covered, namely when the hook part 82 does not enter the hook groove 27, the switch arm 92 can not be actuated, namely when the cover is opened and closed, the printing switch component can receive the cover opening and closing information through the hook part 82 at the first time, and the problem of mistakenly printing when the cover is opened or closed by the printer in the prior art can not be caused; in addition, the microswitch main body 9 and the switch arm 92 form a complete microswitch, and a mechanical switch, namely the microswitch, is used as a printing switch, so that the reliability of the switch is improved; the whole mechanism is stable and reliable, compact in structure, simple, practical and convenient to use.

Further, lower cover 2 is equipped with switch mounting groove 28, switch mounting groove 28 is located the side of hook groove 27, switch mounting groove 28 and hook groove 27 intercommunication, micro-gap switch main part 9 is located switch mounting groove 28, and switch arm 92 stretches into hook groove 27 through switch mounting groove 28 and hook groove 27's intercommunication department. A first preset included angle is formed between the switch installation groove 28 and the hook groove 27, and a second included angle is formed between the microswitch main body 9 and the switch arm 92 in a natural state, wherein the first included angle is equal to the second included angle. The width of the switch mounting groove 28 is the same as the width of the microswitch main body 9 to limit the translation of the microswitch main body 9 in a partial direction.

And, a pin 281 is arranged in the switch mounting groove 28, a pin hole 91 is correspondingly arranged in the microswitch main body 9, and the pin 281 is arranged in the pin hole 91 in a penetrating way to limit the rotation of the microswitch main body 9. The lower cover 2 is provided with a threaded hole 29, the threaded hole 29 is located beside the switch mounting groove 28, a screw is mounted in the threaded hole 29, the length direction of the screw is parallel to the length direction of the pin 281, and the head of the screw is pressed on the micro switch main body 9 to completely limit the movement of the micro switch main body 9.

Further, the hook groove 27 includes a hook groove body 271 and a switch arm avoiding groove 272 disposed on one side of the hook groove body 271, the switch arm avoiding groove 272 is located between the switch installation groove 28 and the hook groove 27, specifically, located at an included angle between the switch installation groove 28 and the hook groove 27, two adjacent sides of the switch arm avoiding groove 272 are respectively communicated with the hook groove 27 and the switch installation groove 28, the hook groove body 271 can accommodate the hook portion 82, when the hook portion 82 is located on the hook groove body 271, the hook portion 82 touches the switch arm 92, so that the switch arm 92 is located on the switch arm avoiding groove 272, and when the hook portion 82 is separated from the hook groove 27, the switch arm 92 is located on the hook groove body 271.

Moreover, the one end of pothook main part 81 and upper cover 1 are equipped with second shaft hole 84 and first shaft hole 111 respectively, the mode that upper cover 1 and pothook 8 wear to locate first shaft hole 111 and second shaft hole 84 through second pivot 112 is articulated, reset spring 113 is the torsional spring, the torsional spring cover is established in second pivot 112, the both ends of torsional spring support upper cover 1 and pothook 8 respectively.

Specifically, the other end of the hook main body 81 is provided with a spring portion 85, the second rotating shaft 112 penetrates through the position between the hook main body 81 and the spring portion 85, one end of the torsion spring abuts against the spring portion 85, the torsion force of the torsion spring enables the spring portion 85 to be far away from the upper cover 1, the hook portion 82 located on the other side of the second rotating shaft 112 moves in the direction of the torsion force of the torsion spring towards the upper cover 1 according to the lever distance, namely the elasticity of the torsion spring enables the hook portion 82 to be buckled into the hook groove 27. The printer can be ensured not to be opened easily after the cover is closed, and the printing is ensured to be smooth.

In addition, the hook main body 81 is provided with pressing parts 83, and the pressing parts 83 and the hook parts 82 are respectively positioned at two opposite sides of the hook main body 81. The cover of the printer can be opened by pressing the pressing part 83 to rotate the hook main body 81, for example, to separate the hook 82 from the hook groove 27.

Referring to fig. 20 and 21, the lower cover 2 includes a lower housing 21, a lower inner cover 22, and a dust cap 23 disposed between the lower housing 21 and the lower inner cover 22, the rubber roller 3 and the paper width adjusting mechanism 210 are both mounted on the lower inner cover 22, and a sensor 211 is further mounted on the lower inner cover 22.

Specifically, a dustproof cover 23 is arranged between the lower shell 21 and the lower inner cover 22 of the conventional printer, and the dustproof cover 23 can be designed into a corresponding inner shape according to the requirement of the inner structure of the printer, so that the place needing dustproof can be more comprehensively covered, foreign matters can be better prevented from falling into the printer, the normal use of the printer is avoided being influenced, and the dustproof effect is good; moreover, no matter how many holes are formed in the lower inner cover 22, only one dust cover 23 needs to be designed, so that the assembly can be simplified, and the internal layout of the printer is more tidy.

Further, a circuit board is installed at the lower end of the dustproof cover 23, and the rubber roller 3 and the sensor 211 are connected with the circuit board through wires. The circuit board is installed at the lower extreme of shield 23, and the part that need use the wire to connect just all concentrates on inner cup 22 and shield 23 down like this, and compact structure arranges the plug wire when the assembly easily like this, does not need the tool of other location circuit boards moreover, just can accomplish the plug wire work of wire, can optimize the process, raises the efficiency, practices thrift tool cost and time cost. Traditionally, the circuit board is installed inside the lower shell 21, and during assembly, because the space distance at the two ends of the wire is too long, the wire is distributed in disorder, and the wire plugging of the wire is not easy to perform, so that the assembly is not good, a jig is required during wire plugging, and the problems are solved well by the mechanism of the printer.

Specifically, the upper end of the dust cover 23 is circumferentially provided with a fastening edge 231, the lower end of the fastening edge 231 is provided with a fastening groove 232, and the upper end of the lower housing 21 is inserted into the fastening groove 232. The structure of the fastening edge 231 and the fastening groove 232 facilitates the alignment of the dust-proof cover 23 and the lower shell 21, and moreover, the outer side surface of the fastening edge 231 is exposed outside, so that the dust-proof cover 23 can be independently matched in color, is convenient to distinguish and is attractive.

Further, the upper end of shield 23 is equipped with the holding tank, the inner cup 22 is located in the holding tank down, the inner cup 22 is equipped with a plurality of buckle archs down along circumference, shield 23 corresponds and is equipped with a plurality of second draw-in grooves 233 along circumference, the buckle is protruding to be inserted and to be located second draw-in groove 233. When the dustproof cover is installed, the lower inner cover 22 is directly clamped into the dustproof cover 23, and the operation is simple.

Moreover, the dust cover 23 is provided with a plurality of positioning holes 234, the lower end of the lower inner cover 22 is provided with a plurality of positioning posts 227, the positioning posts 227 are inserted into the positioning holes 234, and the lower inner cover 22 and the lower housing 21 are connected by means of screws penetrating through the positioning posts 227.

Therefore, the lower inner cover 22 and the lower shell 21 clamp the dust cover 23 in the middle, the dust cover 23 does not need to be locked by screws, the installation is simple, practical and convenient, the locking is stable and reliable, and the structure can shorten the assembly time.

In addition, the dust cover 23 is provided with a motor through groove 235 and a wire passing hole 236, the rubber roller 3 is driven by a motor, the motor is located beside the rubber roller 3, the motor through groove 235 is arranged in the motor in a penetrating manner, and a wire connecting the sensor 211 and the circuit board penetrates through the wire passing hole 236, so that wiring is facilitated. Therefore, the motor is positioned in the lower shell 21, and the interior of the lower shell 21 is open, so that the heat dissipation of the motor is facilitated.

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 present invention shall fall within the protection scope of the present invention as long as the technical effects of the present invention are achieved by any similar or identical means.

Claims

1. A thermal printer, characterized by: including upper cover and lower cover, the left end of upper cover and the left end of lower cover are articulated each other, the upper end of lower cover is equipped with the rubber roll, the rubber roll axial is followed left right direction and is extended, the corresponding rubber roll position department of upper cover is equipped with the heat-sensitive piece, the upper end of lower cover still is equipped with paper width adjustment mechanism, paper width adjustment mechanism sets up in two sliders of lower cover including sliding from side to side, be equipped with paper feed mouth and exit slot between upper cover and the lower cover, the front end and the rear end of printer are located respectively to paper feed mouth and exit slot.

2. A thermal printer according to claim 1, wherein: the upper cover is provided with a paper feeding groove at the paper feeding port, a paper feeding roller is rotatably arranged in the paper feeding groove, the axial direction of the paper feeding roller is parallel to the axial direction of the rubber roller, the paper feeding roller is provided with a plurality of convex rings along the axial direction, a gap is arranged between every two adjacent convex rings, the upper cover is provided with an inclined convex plate and a flat convex plate, the inclined convex plate and the flat convex plate are positioned between the paper feeding port and the heat-sensitive sheet, the flat concave plate and the inclined concave plate are arranged at the corresponding positions of the lower cover, the flat concave plate and the inclined concave plate are positioned between the paper inlet and the rubber roller, a paper feeding channel is formed between the inclined convex plate and the flat convex plate as well as between the flat concave plate and the inclined concave plate, the height of the paper feed channel is reduced from front to back, a plurality of convex ribs are arranged on the inclined convex plate, the flat concave plate and the inclined concave plate, a gap is reserved between every two adjacent convex ribs, and the length direction of each convex rib is the same as the paper feed direction.

3. A thermal printer according to claim 1 or 2, wherein: the left end of the upper cover is provided with an elastic piece, one end of the elastic piece can move to be far away from or close to the upper cover, a concave part is arranged at the position corresponding to the left end of the lower cover, the maximum distance from one end of the elastic piece to the rotary joint of the upper cover and the lower cover is larger than the minimum distance from the lower side wall of the concave part to the rotary joint of the upper cover and the lower cover under the natural state of the elastic piece, and when the upper cover is opened at a preset angle relative to the lower cover, one end of the elastic piece is located in the concave part.

4. A thermal printer according to claim 3, wherein: the elastic piece is a first elastic piece, the left end of the upper cover is provided with a curved plate, the first curved end of the curved plate is connected with the left end of the upper cover, the other end of the first elastic piece is connected with the second curved end of the curved plate, a curved plate avoiding groove is correspondingly arranged inside the left end of the lower cover, a second elastic piece is arranged on the right side wall of the curved plate avoiding groove, the concave part is located in the middle of the second elastic piece, the concave part is a strip-shaped groove extending forwards and backwards, a strip-shaped convex part is arranged at the lower part of the second elastic piece, the convex part is located at the lower side of the concave part, the side wall surface between the convex part and the concave part is shared, the side wall surface shared by the convex part and the concave part is located on the inclined surface, and the maximum distance from one end of the first elastic piece to the rotating joint of the upper cover and the lower cover is greater than the minimum distance from the.

5. The thermal printer according to claim 1 or 4, wherein: the utility model discloses a rubber roll, including rubber roll, lower cover, axle sleeve, locating strip, fixing groove, locating strip, locating groove, locating strip, locating groove.

6. A thermal printer according to claim 1 or 2, wherein: the heat-sensitive support is further included, the heat-sensitive sheet is installed on the heat-sensitive support, the heat-sensitive groove is formed in the rear end of the upper cover, the heat-sensitive support can be installed in the heat-sensitive groove, the spring is installed at the bottom of the heat-sensitive groove, the lower end of the spring can abut against the heat-sensitive support, the slot is formed in the front side wall of the heat-sensitive groove, the inserting sheet is arranged on the front side of the heat-sensitive support in an inserting mode, the front portion of the left side wall of the heat-sensitive groove and the front portion of the right side wall of the heat-sensitive groove are both provided with a stop block, the front portion of the left side.

7. The thermal printer of claim 6, wherein: the upper cover is provided with a limiting block, the limiting block is positioned in front of the slot, and the limiting block covers part or all of the lower part of the slot when the upper cover is seen from the front-back direction.

8. A thermal printer according to claim 1 or 7, wherein: the right-hand member of upper cover and the right-hand member of lower cover are equipped with respectively and uncap subassembly and print switch subassembly, the subassembly of uncapping includes pothook and reset spring, pothook and upper cover are connected respectively at reset spring's both ends, the pothook includes hook portion, print switch subassembly including the micro-gap switch main part of locating the lower cover with locate the switch arm in the micro-gap switch main part, the lower cover is equipped with the hook groove, a part or whole of switch arm are located the hook groove, work as upper cover and lower cover lid close, hook portion gets into the hook groove under reset spring's effect, just hook portion butt switch arm.

9. The thermal printer of claim 8, wherein: the lower cover is provided with a switch mounting groove, the switch mounting groove is located at the side of the hook groove, the switch mounting groove is communicated with the hook groove, the micro switch main body is arranged in the switch mounting groove, the hook groove comprises a hook groove body and a switch arm arranged on one side of the hook groove body, the hook groove body can accommodate a hook portion, the switch arm is arranged between the switch mounting groove and the hook groove, the adjacent two sides of the groove are respectively communicated with the hook groove and the switch mounting groove through the switch arm, when the hook portion is located in the hook groove body, the switch arm is located in the switch arm and avoids the groove, when the hook portion is separated from the hook groove, the switch arm is located in the hook groove body.

10. A thermal printer according to claim 1 or 2, wherein: the lower cover comprises a lower shell, a lower inner cover and a dustproof cover arranged between the lower shell and the lower inner cover, the rubber roller and the paper width adjusting mechanism are all installed on the lower inner cover, the sensor is further installed on the lower inner cover, the circuit board is installed at the lower end of the dustproof cover, and the rubber roller and the sensor are all connected with the circuit board through wires.