CN211363980U - Miniature thermal printer with longitudinal cover - Google Patents

Abstract

The utility model provides a miniature thermal printer who vertically uncaps, including the heat-sensitive piece, the rubber roll, lid and base are articulated, heat-sensitive piece and rubber roll are relative and form the paper feed passageway, form the exit slot between lid and the base, paper feed passageway and exit slot intercommunication, the lid extends towards the base in and is provided with the rocking arm, the rocking arm is provided with first articulated portion, be provided with second articulated portion in the base, first articulated portion is articulated with second articulated portion, the rocking arm can be at last hinge position and remove for second articulated portion between the hinge position down, go up the top of hinge position same vertical direction down. Remove the lid through vertical direction when uncapping, make lid and base form vertical dislocation then, avoid the lid to interfere with the base when rotating to open then, guarantee that the lid opens smoothly, and the lid closes the accurate cooperation of the rubber roll on heat-sensitive piece on the lid and the base behind and, guarantee to print the quality.

Description

Miniature thermal printer with longitudinal cover

Technical Field

The utility model relates to a thermal printing field especially relates to a miniature thermal printer who vertically uncaps.

Background

With the popularization and application of thermal printers, the thermal printers are used not only in automatic teller machines of banks, cash registers of supermarkets and delivery places of e-commerce, but also in commercial fields such as e-commerce industry and express delivery industry, and now portable thermal printers are gradually and widely applied to the field of personal consumption and use.

The thermal printer is generally provided with a shell, a paper bin, a rubber roller and a thermal sensitive sheet, wherein the printing paper in the paper bin is input to the rubber roller and the thermal sensitive sheet, and then is printed to form an image, because printing paper needs to be replaced, a cover body of the printer needs to be opened frequently, the cover body is covered after the replacement, and the thermal sensitive sheet is opposite to the rubber roller, while a commercial seat type thermal printer has larger whole machine and more structural arrangement space, so the problem of interference between a cover and a base can be solved less when the cover opening structure is designed, and a portable micro thermal printer has smaller whole machine, the size and palm of the whole machine are not large, the components need to be arranged in the micro thermal printer, so the structure layout of the micro thermal printer is particularly important, the integrity and the smoothness of the shell of the micro thermal printer have higher requirements, so the cover opening structure and the cover opening interference problem need to be designed emphatically, so as to ensure the use hand feeling of the micro thermal printer.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a miniature thermal printer that vertical dislocation removed uncaps.

In order to realize the purpose of the utility model, the utility model provides a miniature thermal printer with a vertically opened cover, which comprises a thermal sensitive sheet, a rubber roller, a cover body and a base, wherein one of the thermal sensitive sheet and the rubber roller is arranged on the cover body, the other one of the thermal sensitive sheet and the rubber roller is arranged on the base, the cover body is hinged with the base, the thermal sensitive sheet and the rubber roller are opposite and form a paper feeding channel, a paper outlet is formed between the cover body and the base, the paper feeding channel is communicated with the paper outlet, the cover body is provided with a first clamping part near the paper outlet, the base is provided with a second clamping part near the paper outlet, the first clamping part and the second clamping part are clamped, the cover body is provided with a rotating arm extending towards the base, the rotating arm is provided with a first hinged part, the base is internally provided with a second hinged part, the first hinged part is hinged with the second hinged, the upper hinge position is positioned above the lower hinge position in the same vertical direction.

It is obvious by above-mentioned scheme, remove the lid through vertical direction when uncapping, make lid and base form vertical dislocation then, avoid the lid to interfere with the base when rotating to open then, guarantee that the lid opens smoothly, and the lid closes the accurate cooperation of the rubber roll on the last heat-sensitive piece of lid and the base, guarantee to print the quality.

In a further aspect, a connecting channel is disposed in communication between the upper hinge location and the lower hinge location, and the connecting channel extends in a vertical direction or an arc direction.

It is from top to bottom visible, when the lid dislocation was removed, can carry out the dislocation removal along the mode of vertical direction, pitch arc, realize then that block portion breaks away from each other, the lid is opened.

It is further preferred that a through slot is provided at the upper surface of the base, the swivel arm passes through the through slot, and a guide projection is provided toward the upper surface of the swivel arm, the guide projection being movable from the through slot to a position adjacent to the upper surface with rotation of the swivel arm.

From top to bottom, utilize the rocking arm to pass the design of wearing the groove to and utilize the sliding fit of guide lug and upper surface, make the lid lift the lid when opening, in order to cooperate the rocking arm to move up along vertical direction, effectively form the height dislocation then, make the lid open smoothly.

In a further aspect, the swivel arm is provided with a limit bump in the base, the limit bump is located at the periphery of the first hinge portion, the base is provided with a first positioning bump, the first positioning bump is located above the limit bump, and the first positioning bump is adjacent to the upper limit surface of the limit bump.

Therefore, the first positioning lug positioned above is abutted with the upper limiting surface of the limiting lug, so that when the cover body is covered, the longitudinal position is limited by the first positioning lug and the limiting lug relative to the other side of the clamping part, and the cover body is more firm and stable when the cover body is covered.

A second positioning lug is arranged in the base and is positioned below the limiting lug, and the second positioning lug is adjacent to the lower limiting surface of the limiting lug; the distance between the surface profile of the lower limiting surface and the center of the first hinge is increased from the center of the first hinge to the rear outer wall of the base.

Therefore, the second positioning lug can be arranged below the limiting lug, the surface contour of the lower limiting surface is utilized to be arranged in a cam surface manner, when the cover body and the rotating arm rotate, the rotating arm is displaced in the vertical direction through the support of the second positioning lug, then the lifting of the cover body is realized, the height dislocation is effectively formed, and the cover body is smoothly opened.

A second rear outer wall is arranged on the base, and the second rear outer wall and the paper outlet are respectively positioned on two opposite sides of the paper feeding channel; the first rear outer wall and the second rear outer wall are in clearance fit.

Therefore, the outer wall is in clearance fit with the second rear outer wall after the first rear outer wall is in clearance fit with the second rear outer wall, so that the integrity and the flatness of the shell can be guaranteed, and the use hand feeling of the miniature thermal printer is greatly improved.

In a further aspect, the first hinge is a hinge post disposed on the swivel arm; the second hinge part is a groove body arranged in the base, the hinge column is matched with the groove body, the upper hinge position is located at the upper end part of the groove body, and the lower hinge position is located at the lower end part of the groove body.

The groove body is provided with an upper hinge groove at the upper end part, a lower hinge groove at the lower end part, the upper hinge groove is positioned above the lower hinge groove in the same vertical direction, the groove body is provided with a connecting groove between the upper hinge groove and the lower hinge groove in a communicated manner, and the width of the connecting groove is smaller than the inner diameter of the upper hinge groove or/and the inner diameter of the lower hinge groove.

Still further, the connecting groove may extend in a vertical direction or in an arc shape.

It is from top to bottom, through the cooperation of hinge post and cell body to guarantee lid and pedestal connection stability, it is spacing to utilize width and the poor realization corresponding position of internal diameter promptly, improves the smoothness nature when uncapping and the position accuracy nature when closing the lid.

In a further scheme, the cover body is provided with a clamping hook close to the paper outlet, and the clamping hook extends towards the base; the base is provided with a latch hook close to the paper outlet, the latch hook is rotatably connected with the base, and the latch hook is clamped with the latch hook; the micro thermal printer further comprises an elastic piece, and the elastic piece is abutted between the lock hook and the base.

It is from top to bottom visible, latch hook through the rotary type, cooperation dislocation removal's lid and pothook for the lid can break away from the latch hook smoothly then realizes smoothly opening.

Drawings

FIG. 1 is a view showing a structure of a first embodiment of a thermal printer according to the present invention.

Fig. 2 is an exploded view of a first embodiment of the thermal printer of the present invention.

Fig. 3 is a cross-sectional view of the first embodiment of the thermal printer of the present invention in a closed state.

Fig. 4 is a sectional view of the first embodiment of the thermal printer of the present invention in a separated state.

Fig. 5 is a sectional view of the first embodiment of the thermal printer of the present invention in an open state.

Fig. 6 is an exploded view of a second embodiment of the thermal printer of the present invention.

Fig. 7 is a cross-sectional view of a second embodiment of the thermal printer of the present invention in a closed position.

Fig. 8 is a sectional view of a second embodiment of the thermal printer of the present invention in a separated state.

Fig. 9 is a sectional view of a second embodiment of the thermal printer of the present invention in an open state.

Fig. 10 is an exploded view of a third embodiment of the thermal printer of the present invention.

Fig. 11 is a cross-sectional view of a third embodiment of the thermal printer of the present invention in a closed state.

Fig. 12 is a sectional view of a third embodiment of the thermal printer of the present invention in an open state.

Fig. 13 is an exploded view of a fourth embodiment of the thermal printer of the present invention.

Fig. 14 is a cross-sectional view of a fourth embodiment of the thermal printer of the present invention in a closed position.

Fig. 15 is a sectional view of a fourth embodiment of the thermal printer of the present invention in a separated state.

Fig. 16 is a cross-sectional view of a fourth embodiment of the thermal miniature printer of the present invention in an open position.

The present invention will be further explained with reference to the drawings and examples.

Detailed Description

First embodiment of the micro thermal printer:

referring to fig. 1 to 5, the thermal printer 1 mainly achieves a longitudinal cover opening, and a cover 11 is rotatably hooked to secure a cover. The micro thermal printer 1 comprises a thermal sensitive sheet 15, a rubber roller 14, a cover 11 and a base 12, wherein the thermal sensitive sheet 15 is arranged on the cover 11, the rubber roller 14 is rotatably arranged on the base 12, of course, the rubber roller 14 is rotatably arranged on the cover 11, the thermal sensitive sheet 15 is arranged on the base 12, the cover 11 is hinged to the base 12, the thermal sensitive sheet 15 is opposite to the rubber roller 14 and forms a paper feeding channel, a paper outlet 13 is formed between the cover 11 and the base 12, the base 12 is provided with an inner shell 122, the inner shell 122 is provided with a paper bin 123, the paper bin 123 is used for placing printing paper 16, the paper feeding channel is linearly communicated between the paper bin 123 and the paper outlet 13, the paper outlet 13 is positioned on the front side of the paper feeding channel based on the horizontal direction, and the paper bin 123 is positioned on the.

The cover 11 is provided with two rotating arms 113 extending towards the base 12, the two rotating arms 113 are respectively located on two sides of the paper bin 123, the upper surface of the inner shell 122 is provided with through slots 124 on two sides of the paper bin 123, the rotating arms 113 penetrate through the through slots 124, the rotating arms 113 are provided with first hinge portions 114 in the base 12, the first hinge portions 114 are hinge posts arranged on the rotating arms 113, the first hinge portions 114 and the paper outlets 13 are respectively located on two opposite sides of the micro thermal printer 1, and the first hinge portions 114 and the rotating arms 113 are close to the second rear outer wall 121.

The pivot arm 113 is bent, and a guide protrusion 117 is disposed at the bent position, the guide protrusion 117 has an outer convex arc-shaped wall, the guide protrusion 117 is disposed toward the upper surface, and the guide protrusion 117 is movable from the through groove 124 to a position adjacent to the upper surface of the through groove 124 with the rotation of the pivot arm 113.

The rotation arm 113 is provided with a limit protrusion 19 in the base, the limit protrusion 19 is located at the periphery of the first hinge 114, the limit protrusion 19 is arranged in a cam shape, the upper surface of the limit protrusion 19 is provided with an upper limit surface 191, the upper limit surface 191 is arranged in a plane, the lower surface of the limit protrusion 19 is provided with a lower limit surface 192, and the lower limit surface 192 extends in a curved surface, specifically, the distance between the surface profile of the lower limit surface and the center of the first hinge 114 increases from the center of the first hinge 114 to the rear outer wall of the base, that is, the part of the surface profile of the lower limit surface 192 close to the first hinge 114 is relatively smaller from the first hinge 114, and the part of the surface profile of the lower limit surface 192 far from the first hinge 114 is relatively larger from the first hinge 114.

Two second hinge parts 17 are arranged in the base 12, the second hinge parts 17 are groove bodies arranged in the base 12, the two groove bodies are respectively located on two sides of the paper bin 123, an upper hinge groove 171 is arranged at the upper end part of each groove body, a lower hinge groove 172 is arranged at the lower end part of each groove body, the upper hinge groove 171 is located above the lower hinge groove 172 in the same vertical direction, a connecting groove 173 is arranged between the upper hinge groove 171 and the lower hinge groove 172 in a communicating mode, the width of the connecting groove 173 is smaller than the inner diameter of the upper hinge groove 171 and the inner diameter of the lower hinge groove 172, the connecting groove 173 extends along an arc shape, and the connecting groove 173 protrudes towards the rubber roller 14.

The upper hinge position is located in the upper hinge groove 171 of the slot body, the lower hinge position is located in the lower hinge groove 172 of the slot body, a connecting channel is arranged between the upper hinge position and the lower hinge position in a communicating manner, the connecting channel is arranged along the connecting groove 173, the hinge post is inserted into the slot body and is matched with the slot body, the first hinge part 114 and the rotating arm 113 can move relative to the second hinge part 17 along the connecting channel and the connecting groove 173 between the upper hinge position and the lower hinge position, and then the first hinge part 114 can be hinged with different parts of the second hinge part 17, so that the cover body 11 can rotate under the action of the cooperation of the slot body.

The cover body 11 is provided with two hooks 115 near the paper outlet 13, the two hooks 115 are located on two sides of the heat-sensitive sheet, the hooks 115 extend towards the base 12, the first clamping portion is arranged at the hook 115, the base 12 is provided with two clamping grooves 126 near the paper outlet 13, the two clamping grooves 126 are respectively located on two sides of the rubber roller, each clamping groove 126 is rotatably provided with a locking hook 18, the locking hook 18 is provided with a limiting portion 182, a rotating shaft portion 183 and a clamping portion 181, the locking hook 18 is hinged to the base 12 through the rotating shaft portion 183, the limiting portion 182 and the clamping portion 181 are located on the periphery of the rotating shaft portion 183, the clamping portion 181 is clamped with the first clamping portion of the hooks 115, and the limiting portion 182 is in limited fit with.

The micro thermal printer 1 further includes an elastic member 184, the elastic member 184 is a spring, a first end of the spring is connected to the base 12, a second end of the spring passes through a groove wall of the engaging groove 126 to be connected to the engaging portion 181 of the locking hook 18, and applies an elastic force toward the rear side, and when the cover 11 covers the base 12, the engaging hook 115 extends into the engaging groove 126 to engage with the locking hook 18. The cover 11 is provided with a first positioning portion 116 near the hook 115, the base 12 is provided with a second positioning portion 125 near the hook 18, the first positioning portion 116 is a positioning column, the second positioning portion 125 is a positioning hole, and the positioning column is in limit fit with the positioning hole.

Referring to fig. 3, when the cover 11 covers the base 12, the cover 11 is provided with a first rear outer wall 111, the first rear outer wall 111 and the paper outlet 13 are respectively located on two opposite sides of the paper feeding channel, the base 12 is provided with a second rear outer wall 121, the second rear outer wall 121 and the paper outlet 13 are respectively located on two opposite sides of the paper feeding channel, and the first rear outer wall 111 and the second rear outer wall 121 are in clearance fit, so that the outer walls of the cover 11 and the base 12 maintain flatness. Moreover, the first hinge part 114 is located at the lower hinge groove 172, the first positioning protrusion 127 is located above the limiting protrusion 19, and the first positioning protrusion 127 is adjacent to the upper limiting surface of the limiting protrusion 19, so that the position of the cover body at the hinge part is stabilized.

Referring to fig. 4, when the cover 11 is opened, the first hinge portion 114 moves along the connecting groove 173 in an arc shape, and drives the locking hook 18 to rotate along with the movement of the cover 11 and the locking hook 115, so as to separate the locking hook 115 and the locking hook 18, referring to fig. 5, because the cover 11 and the base 12 are longitudinally misaligned, after the cover 11 rotates, the guide protrusion 117 rotates out of the through groove 124, abuts against the upper surface of the through groove 124 by using the arc surface, and then, along with the rotation of the rotating arm, the guide protrusion 117 lifts the rotating arm and the cover in the vertical direction, and then the first rear outer wall 111 and the second rear outer wall 121 are misaligned with each other, so that the cover can be smoothly opened.

Of course, the first hinge portion 114 can also be a groove body disposed on the rotating arm 113, the second hinge portion 17 is a hinge post disposed in the base 12, the hinge post is matched with the groove body, the groove body is disposed at the upper end portion and is provided with a lower hinge groove, the upper hinge groove is disposed above the lower hinge groove in the same vertical direction, the groove body is disposed between the upper hinge groove and the lower hinge groove and is communicated with the connecting groove, the upper hinge position is disposed at the lower hinge groove, the lower hinge position is disposed at the upper hinge groove, and the purpose of the present invention can be achieved by the arrangement.

Second embodiment of the micro thermal printer:

under the basic concept and the same principle of the first embodiment of the micro thermal printer, the second embodiment of the micro thermal printer changes the second hinge 27, referring to fig. 6, the second hinge 27 is a groove body disposed in the base 12, the two groove bodies are respectively disposed on two sides of the paper compartment, the groove body is provided with an upper hinge groove 271 at the upper end portion, the groove body is provided with a lower hinge groove 272 at the lower end portion, the upper hinge groove 271 is disposed above the lower hinge groove 272 in the same vertical direction, the groove body is provided with a connecting groove 273 communicatively between the upper hinge groove 271 and the lower hinge groove 272, the connecting groove 273 extends in the vertical direction, and the width of the connecting groove 273 is smaller than the inner diameter of the upper hinge groove 271 and the inner diameter of the lower hinge groove.

The upper hinge position is located in the upper hinge groove 271 of the groove body, the lower hinge position is located in the lower hinge groove 272 of the groove body, a connecting channel is arranged between the upper hinge position and the lower hinge position in a communicating manner, the connecting channel is arranged along the connecting groove 273, the hinge column is inserted into the groove body and matched with the groove body, the first hinge portion 114 and the rotating arm 113 can move relative to the second hinge portion 27 along the connecting channel and the connecting groove 273 between the upper hinge position and the lower hinge position, and then the first hinge portion 114 can be hinged with different portions of the second hinge portion 27, so that the cover body 11 can rotate under the matching action of the groove body.

In addition, a second positioning lug 128 is further disposed in the base, the second positioning lug 128 is located below the second hinge portion 27, the second positioning lug 128 has an upward convex arc surface, and the upward convex arc surface of the second positioning lug 128 is used for rotationally matching and limiting matching with the lower limiting surface 192 of the limiting lug 19.

Referring to fig. 7, when the cover 11 covers the base 12, the cover 11 is provided with a first rear outer wall 111, the first rear outer wall 111 and the paper outlet 13 are respectively located on two opposite sides of the paper feeding path, the base 12 is provided with a second rear outer wall 121, the second rear outer wall 121 and the paper outlet 13 are respectively located on two opposite sides of the paper feeding path, the first rear outer wall 111 and the second rear outer wall 121 are in clearance fit, thereby maintaining the flatness of the outer walls of the cover 11 and the base 12, and, at this time, the first hinge 114 is located in the lower hinge groove 272, the first positioning projection 127 is located above the limiting projection 19, the first positioning projection 127 is located at the rear side of the second hinge portion 27 in the horizontal direction, the first positioning projection 127 is adjacent to the upper limiting surface of the limiting projection 19, the second positioning projection 128 is located below the limiting projection 19, and the second positioning projection 128 is in limiting fit with the lower limiting surface 192 of the limiting projection 19, so that the cover body at the hinge portion is fixed in position.

Referring to fig. 8, when the cover 11 is opened, the first hinge portion 114 moves upward along the connecting groove 273 in the vertical direction, and drives the latch hook 18 to rotate along with the movement of the cover 11 and the latch hook 115, thereby achieving the separation of the latch hook 115 and the latch hook 18, and at the same time, the rotation of the rotation arm drives the rotation of the lower limit surface 192 of the limit projection 19, and the rotation arm and the cover are lifted in the vertical direction by using the profile change of the lower limit surface 192, and the limit projection 19 is separated from between the first limit projection 127 and the second limit projection 128, referring to fig. 9, the first hinge portion 114 is located in the upper hinge groove 271, and after the cover 11 is opened by rotation, the first rear outer wall 111 and the second rear outer wall 121 are staggered with each other due to the longitudinal dislocation between the cover 11 and the base 12, thereby opening smoothly.

Third embodiment of the micro thermal printer:

under the basic concept and the same principle of the first embodiment of the micro thermal printer, the third embodiment of the micro thermal printer changes the second hinge part and the clamping part, referring to fig. 10, the second hinge part 37 is a groove body arranged in the base, the two groove bodies are respectively arranged at two sides of the paper bin, the groove body extends along the horizontal direction, the front end part of the groove body is provided with a front hinge groove 371, the groove body is provided with a rear hinge groove 372 at the rear end part, the front hinge groove 371 is arranged at the front part of the rear hinge groove 372 close to the paper outlet in the same horizontal direction, the groove body is provided with a connecting groove 373 and 373 between the front hinge groove 371 and the rear hinge groove 372 in a communicating manner, the connecting groove 373 extends along the horizontal direction, the front hinge position is arranged at the front end part of the groove body, the rear hinge position is arranged at the rear end part of the groove body, a connecting channel is arranged between the. The cover body is provided with a rotating arm 313 extending towards the inside of the base, the rotating arm 313 is provided with a first hinge part 314, and the first hinge part 314 can adopt a hinge post which is inserted into the groove body and is matched with the groove body in a sliding and rotating way.

The micro thermal printer further includes an elastic member 384, the base is provided with a positioning column 385, and the elastic member 384 employs a spring, which is arranged in a horizontal direction and is connected between the positioning column 385 and the first hinge portion 314.

The cover body is provided with a hook 315 extending towards the base, the first clamping portion is arranged on the hook 315, the base is provided with a clamping groove 326, the second clamping portion is arranged at the clamping groove 326, when the cover body is closed, the hook 315 is clamped with the clamping groove 326, and the hook 315 can move in the clamping groove 326 along the horizontal direction.

Referring to fig. 11, when the cover is closed on the base, the first hinge 314 is located in the front hinge groove 271, and the hook 315 is tightly engaged with the engaging groove 326 under the elastic force of the elastic member 384 toward the front side.

Referring to fig. 12, when the cover 11 is opened, the first hinge portion 314 moves along the connection groove 373 toward the rear side in the horizontal direction, and drives the hook 315 to move horizontally in the slot 326 along with the horizontal movement of the cover, so that the rotating arm 313 can move between the front hinge position and the rear hinge position relative to the second hinge portion 37, the first hinge portion 314 is located in the rear hinge groove 372, and is matched with the corresponding opened and rotated position, so as to separate the hook 315 from the slot 326, and since the cover and the base are laterally dislocated, after the cover is rotated and opened, the first rear outer wall and the second rear outer wall are staggered with each other, and then are smoothly opened.

Of course, the first hinge 314 may be a horizontally extending slot provided on the rotation arm 313, the second hinge 37 may be a hinge post provided in the base, the hinge post is engaged with the slot, and the elastic member is connected with the rotation arm. In addition, the width of the connecting groove 373 is smaller than the inner diameter of the front hinge groove 371 and the inner diameter of the rear hinge groove 372, and the hinge columns are limited and positioned through the inner diameters of the groove bodies.

Fourth embodiment of the micro thermal printer:

under the basic concept and the same principle of the first embodiment of the micro thermal printer, the fourth embodiment of the micro thermal printer changes the second hinge part and the clamping part, referring to fig. 13, the second hinge part 47 is a groove body arranged in the base, the two groove bodies are respectively arranged at two sides of the paper bin, the groove body extends along the inclined direction of the inclined direction and the horizontal direction, the groove body is provided with a front lower hinge groove 471 at the front lower end part, the groove body is provided with a rear upper hinge groove 472 at the rear upper end part, the rear upper hinge groove is arranged above the vertical direction of the front lower hinge groove, the front lower hinge groove is arranged in the front of the rear upper hinge groove close to the paper outlet in the horizontal direction, the groove body is provided with a connecting groove 473 between the front lower hinge groove 471 and the rear upper hinge groove 472, the width of the connecting groove 473 is smaller than the inner diameter of the front lower hinge groove 471 and the inner diameter of the rear upper hinge groove 472, the connecting groove 473 can extend in an, and the connecting groove 473 either protrudes towards the rear of the horizontal direction or protrudes towards the front of the horizontal direction, the purpose of the present invention can be achieved.

The front lower hinge position is located in the front lower hinge groove 471 of the groove body, the rear upper hinge position is located in the rear upper hinge groove 472 of the groove body, a connecting channel is arranged between the rear upper hinge position and the front lower hinge position in a communicating manner, and the connecting channel extends along the extending direction of the connecting groove 473.

The lid extends towards the base and is provided with pothook 415, first block portion sets up on pothook 415, the base is provided with draw-in groove 426, second block portion is located draw-in groove 426 department, pothook 415 and draw-in groove 426 block, draw-in groove 426 is provided with slope guide slot wall 427 at the rear of horizontal direction, pothook 415 can be adjoined with slope guide slot wall 427, and pothook 415 can move along the horizontal direction in draw-in groove 426, in addition, pothook 415 is provided with spacing 417 at horizontal lateral wall, spacing 417 extends along vertical direction, and along horizontal arch, when pothook 415 inserts draw-in groove 426, spacing 417 is adjoined with the slot wall of draw-in groove 426, then realize horizontal direction spacing.

The first hinge 414 is a hinge post disposed on the rotating arm 413, the hinge post is engaged with the slot, and the hinge post is inserted into the slot and slidably and rotatably engaged with the slot.

Referring to fig. 14, when the cover is closed on the base, the first hinge 414 is located in the front lower hinge groove 471, and the hook 315 is tightly engaged with the engaging groove 326.

Referring to fig. 15, when the cover 11 is opened, an external force is applied to pull the cover in the upward and rearward direction, the first hinge 414 moves along the connection slot 473 in the upward and rearward direction, and the inclined guide surface 416 of the bottom of the hook 415 is guided and engaged with the inclined guide slot wall 427 in the upward direction, so that the hook 415 and the slot 426 are separated, referring to fig. 16, the rotation arm 313 can move between the front hinge position and the rear hinge position relative to the second hinge 47, the first hinge 414 is located in the upper and rear hinge slots 472 and is engaged with the corresponding opening rotation, and after the cover is rotated and opened, the first and second rear outer walls are staggered from each other, so that the cover is smoothly opened.

Of course, the first hinge 414 could be a horizontally extending slot provided on the swivel arm 413 and the second hinge 47 could be a hinge post provided in the base that mates with the slot.

Above-mentioned embodiment is only the utility model discloses a preferred embodiment, in-service use, the arrangement of spread groove to and connect channel's design mode can have a variety, and the present case mainly is according to the dislocation of the lid that takes place between the articulated position of two differences and base, realizes then that the lid does not have the interference and opens. And the different clamping structures between the cover body and the base in the embodiment can also be adapted to the moving mode and the opening mode of various cover bodies. All of the above variations are within the scope of the present invention.

It is from top to bottom visible, remove the lid through vertical direction when uncapping, make lid and base form vertical dislocation then, avoid the lid to interfere with the base when rotating to it is smooth to guarantee that the lid opens, and the lid closes the accurate cooperation of the rubber roll on the last temperature sensing piece of lid and the base, guarantees to print the quality. When the lid dislocation was removed, can carry out the dislocation removal along the mode of vertical direction, pitch arc, realize then that block portion breaks away from each other, the lid is opened. Through outer wall clearance fit behind first back outer wall and the second to can guarantee the integrality and the roughness of shell, thereby improve miniature thermal printer's use greatly and feel. Through the cooperation of articulated post and cell body to guarantee lid and pedestal connection stability, it is spacing to utilize width and the poor realization corresponding position of internal diameter promptly, improves the smoothness nature when uncapping and the position accuracy nature when closing the lid.

In addition, through rotatable latch hook for the lid is opening when driving the pothook and rotate, and two pivoted pothooks each other and latch hook can realize rotating the unblock, then open the lid smoothly, and pivoted latch hook simple structure and space occupy for a short time, and the structural layout of uncapping of easily miniature thermal printer is convenient for miniature thermal printer's miniaturization. Stretch into draw-in groove and latch hook cooperation through the pothook, realize then that the stable lid of lid closes to be connected to the elasticity joint of cooperation elastic component and the circumference of spacing portion are spacing, thereby make the lid open and shut stably. Through the spacing cooperation of first location portion and second location portion, locating hole and reference column promptly to it is stable to make lid and base position cooperation, thereby guarantees the relative position of temperature sensing piece and rubber roll, improves and prints the quality.

Moreover, remove the lid through the horizontal direction when uncapping, make lid and base form horizontal dislocation then, avoid the lid to interfere with the base when rotating to open then, guarantee that the lid opens smoothly, and the lid closes the accurate cooperation of the rubber roll on the last temperature sensing piece of lid and the base, guarantee to print the quality. The positions of the cover body and the base are locked by the elastic piece, so that the locking stability is improved, and the printing quality is stabilized. The clamping hook can move in the clamping groove along the horizontal direction and is clamped with the clamping groove, so that the cover body can transversely move within a reasonable stroke range, and the cover opening and closing locking can be realized. Through the cooperation of articulated post and cell body to guarantee lid and pedestal connection stability, it is spacing to utilize width and the poor realization corresponding position of internal diameter promptly, improves the smoothness nature when uncapping and the position accuracy nature when closing the lid.

Finally, remove the lid through the incline direction when uncapping, make lid and base form vertical and horizontal dislocation then, avoid the lid to interfere with the base when rotating to open then, guarantee that the lid opens smoothly, and the lid closes the accurate cooperation of the rubber roll on the last temperature sensing piece of lid and the base, guarantee to print the quality. When the lid dislocation was removed, can carry out the dislocation removal along the mode of incline direction, pitch arc, realize then that block portion breaks away from each other, the lid is opened. Through outer wall clearance fit behind first back outer wall and the second to can guarantee the integrality and the roughness of shell, thereby improve miniature thermal printer's use greatly and feel. The clamping hook can move in the clamping groove along the horizontal direction, is clamped with the clamping groove and is matched with the guide of the inclined guide groove wall, so that the cover body can move in the inclined movement stroke range, and the inclined upper cover opening and the inclined lower cover closing locking are realized.

Claims (10)

1. A miniature thermal printer with a cover opened longitudinally comprises a thermal sensitive sheet, a rubber roller, a cover body and a base, wherein one of the thermal sensitive sheet and the rubber roller is arranged on the cover body, the other of the thermal sensitive sheet and the rubber roller is arranged on the base, the cover body is hinged with the base, the thermal sensitive sheet and the rubber roller are opposite to each other and form a paper feeding channel, a paper outlet is formed between the cover body and the base, the paper feeding channel is communicated with the paper outlet, a first clamping part is arranged on the cover body close to the paper outlet, a second clamping part is arranged on the base close to the paper outlet, and the first clamping part and the second clamping part are clamped;

the method is characterized in that:

the cover body extends towards the base to be provided with a rotating arm, the rotating arm is provided with a first hinge portion, a second hinge portion is arranged in the base, the first hinge portion is hinged to the second hinge portion, the rotating arm can move relative to the second hinge portion between an upper hinge position and a lower hinge position, and the upper hinge position is located above the lower hinge position in the same vertical direction.

2. The miniature thermal printer according to claim 1, wherein:

and a connecting channel is arranged between the upper hinge position and the lower hinge position in a communicated manner and extends along the vertical direction or the arc direction.

3. The miniature thermal printer according to claim 1, wherein:

the upper surface of the base is provided with a through groove, the rotating arm penetrates through the through groove, the rotating arm is provided with a guide lug towards the upper surface, and the guide lug can move from the through groove to a position adjacent to the upper surface along with the rotation of the rotating arm.

4. The miniature thermal printer according to claim 1, wherein:

the base is internally provided with a limiting lug on the rotating arm, the limiting lug is positioned on the periphery of the first hinged part, the base is internally provided with a first positioning lug, the first positioning lug is positioned above the limiting lug, and the first positioning lug is abutted to the upper limiting surface of the limiting lug.

5. The miniature thermal printer according to claim 4, wherein:

a second positioning lug is arranged in the base and is positioned below the limiting lug, and the second positioning lug is adjacent to the lower limiting surface of the limiting lug;

the lower stop surface has a surface profile that increases in distance from the center of the first hinge to the rear outer wall of the base.

6. The miniature thermal printer according to claim 1, wherein:

the cover body is provided with a first rear outer wall, the first rear outer wall and the paper outlet are respectively positioned on two opposite sides of the paper feeding channel, the base is provided with a second rear outer wall, and the second rear outer wall and the paper outlet are respectively positioned on two opposite sides of the paper feeding channel;

the first rear outer wall and the second rear outer wall are in clearance fit.

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

the first hinge part is a hinge column arranged on the rotating arm;

the second hinge part is arranged on a groove body in the base, the hinge column is matched with the groove body, the upper hinge position is located at the upper end part of the groove body, and the lower hinge position is located at the lower end part of the groove body.

8. The miniature thermal printer according to claim 7, wherein:

the cell body is provided with the hinge groove at last tip, the cell body is provided with down the hinge groove at tip down, go up the hinge groove and be located the top of the same vertical direction in hinge groove down, the cell body is in go up the hinge groove with be provided with the spread groove under between the hinge groove with communicateing, the width of spread groove is less than go up the internal diameter in hinge groove or/and the internal diameter in hinge groove down.

9. The miniature thermal printer according to claim 8, wherein:

the connecting groove extends along a vertical direction or along an arc shape.

10. The micro thermal printer according to any one of claims 1 to 6, wherein:

the cover body is provided with a clamping hook close to the paper outlet, and the clamping hook extends towards the base;

a latch hook is arranged on the base close to the paper outlet and can be rotatably connected with the base, and the latch hook is clamped with the latch hook;

the micro thermal printer further comprises an elastic piece, and the elastic piece is abutted between the lock hook and the base.

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