CN111546792A - Thermal printer with retractable thermal sensitive sheet - Google Patents

Abstract

The invention provides a thermal printer with a retractable thermal sensitive sheet, which comprises a base, a thermal sensitive assembly and a rubber roller, wherein the base is provided with a paper feeding through groove along a paper feeding direction, the thermal sensitive assembly and the rubber roller are respectively arranged on one side of the paper feeding through groove opposite to each other based on the paper thickness direction, the thermal sensitive assembly comprises a mounting bracket, a thermal sensitive sheet, a bracket resetting piece and a connecting piece, the mounting bracket is provided with a first matching convex part, the connecting piece is provided with a second matching convex part, the second matching convex part is in adjacent matching with the first matching convex part, the bracket resetting piece is elastically connected between the mounting bracket and the base, the thermal sensitive sheet is arranged on the mounting bracket, the thermal sensitive sheet is opposite to the rubber roller, and the mounting bracket and the thermal sensitive. Through the thermal sensitive sheet backspacing structural design of the scheme, the printing paper can be conveniently loaded and positioned, and the printing paper can be adaptively applied to handheld thermal sensitive sheet printers, seat type thermal sensitive printers, seat type thermal transfer printers and paper bin-free type external delivery paper thermal sensitive printers.

Description

Thermal printer with retractable thermal sensitive sheet

Technical Field

The invention relates to the field of thermal printing, in particular to a thermal printer with a retractable thermal sensitive sheet.

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 handheld thermal printers are gradually and widely applied to the personal consumption field.

The thermal printer is generally provided with a cover body, a base, a rubber roller and a thermal sensitive sheet, wherein the cover body and the base enclose a paper bin, 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, the printing paper is replaced, the cover body of the printer needs to be opened, the opening mode generally adopts the mode that the cover body is opened from bottom to top along the paper thickness direction, the thermal sensitive sheet on the cover body is separated from the rubber roller on the base, after the printing paper is loaded, the cover body is covered and closed, the thermal sensitive sheet is opposite to the rubber roller, and the printing paper passes through the space between. The commercial seat type thermal printer has larger complete machine and more structural arrangement space, while the portable hand-held thermal printer has smaller complete machine, the size of the complete machine is almost the same as that of a palm, and the components are required to be arranged in the miniature thermal printer, so that the structural layout of the components of the hand-held thermal printer is particularly important, and the design of further improving the cover opening structure and the paper loading mode is required.

Disclosure of Invention

The invention aims to provide a thermal printer with a retractable thermal sensitive sheet for conveniently loading paper.

In order to achieve the purpose of the invention, the invention provides a thermal printer with a retractable thermal sensitive sheet, which comprises a base, a thermal sensitive assembly and a rubber roller, wherein the base is provided with a paper feeding through groove along a paper feeding direction, the thermal sensitive assembly and the rubber roller are respectively arranged on one side of the paper feeding through groove opposite to the paper thickness direction, the thermal sensitive assembly comprises a mounting bracket, a thermal sensitive sheet, a bracket resetting piece and a connecting piece, the mounting bracket is provided with a first matching convex part, the connecting piece is provided with a second matching convex part, the second matching convex part is in abutting fit with the first matching convex part, the bracket resetting piece is elastically connected between the mounting bracket and the base, the thermal sensitive sheet is arranged on the mounting bracket, the thermal sensitive sheet is opposite to the rubber roller, and the mounting bracket and the thermal sensitive.

By the above scheme, it is visible, through mobilizable connecting piece, with second cooperation convex part with have first cooperation convex part to adjoin to the cooperation, and the support resets and applys the elastic force to the installing support, then can realize connecting piece drive installing support and temperature sensing piece orientation or keep away from the rubber roll and remove, when the rubber roll was kept away from to the temperature sensing piece, then can conveniently pass the paper feed logical groove in the beat paper of tiling form, be close to the rubber roll and to the centre gripping of beat paper at the temperature sensing piece, can carry out the paper feed and print, the temperature sensing piece of present case rolls back structural design, conveniently in the location of packing into of beat paper, but its adaptation is used at handheld temperature sensing piece printer, seat formula thermal transfer printer and the outer defeated paper thermal printer.

Further, the connecting piece can move along the paper width direction, and the mounting bracket is hinged with the base and can rotate in the paper thickness direction.

Therefore, the connecting piece moves in the paper width direction and the mounting bracket rotates in the paper thickness direction, so that the heat-sensitive sheet can be conveniently retracted or pushed, and the connecting operation of the connecting piece is facilitated.

The connecting piece is provided with butt portion and lock portion respectively at the both ends of paper width direction, and thermal printer still resets and locking piece including connecting, connects the elastic butt of piece that resets between butt portion and base, and the locking piece is connected with the lock portion detachable.

From top to bottom, the locking piece is connected with the lock portion, can keep the position of connecting piece, keeps the relative position of installing support and heat sensitive piece then, improves operating stability, separates as locking piece and lock portion, and owing to connect the piece that resets and applys the elastic force along the paper width direction to the butt portion of connecting piece, the connecting piece pops out then, and heat sensitive piece separates with the rubber roll.

According to a further scheme, the thermal printer further comprises a locking reset piece, the locking piece is provided with a clamping block, the locking portion is arranged in a clamping groove, the locking reset piece is elastically abutted between the locking piece and the base, and the clamping block is separably connected with the clamping groove.

It is thus clear that the elasticity through locking reset piece to locking piece is pressed and is held power to improve the locking of locking piece to the connecting piece, thereby improve the operating stability of equipment.

The further scheme is that the base is provided with a positioning through hole and a positioning blind hole, the positioning through hole is arranged in a penetrating mode and communicated with the positioning blind hole along the paper width direction, the connecting piece penetrates through the positioning through hole, and the abutting portion and the connecting reset piece are both located in the positioning blind hole.

From top to bottom, through the installation location of location perforation and location blind hole to the connecting piece to stabilize the removal and the fixed of connecting piece, and pass the location perforation through the tip of connecting piece, can be convenient for push the operation to the connecting piece.

The further scheme is that the outer wall of the connecting piece is provided with a limiting block, the limiting block is located between the positioning through hole and the positioning blind hole, and the limiting block is in limiting fit with the positioning through hole.

It is from top to bottom seen, through being located inboard stopper and the spacing cooperation of perforation of location, prevent that the transition of connecting piece from popping out, avoid breaking away from of connecting piece.

Further, the mounting bracket is provided with an avoidance concave part on one side of the first matching convex part based on the paper width direction, and the second matching convex part can move to the avoidance concave part.

From the above, through set up first cooperation convex part and dodge the concave part on the installing support, utilize the great difference in height between convex part and the concave part to improve the movable range of installing support and heat-sensitive piece.

Further, the first fitting projection and/or the second fitting projection may be provided with a guide slope.

Therefore, through the arrangement of the guide inclined plane, the convex part which is convenient to move is matched, and the stable movement of the mounting bracket and the heat-sensitive sheet is realized.

The mounting bracket is provided with at least two first matching convex parts along the paper width direction, and the connecting piece is provided with at least two second matching convex parts along the paper width direction.

It can be seen from above that because temperature sensing piece and rubber roll all extend along the paper width direction, through two at least cooperation convex parts that set up along the paper width direction to the balanced support of installing support, also provide balanced supporting platform to the temperature sensing piece.

The base is provided with a paper bin groove, the paper feeding through groove is provided with a paper outlet at the front end of the paper feeding direction, the paper feeding through groove is communicated with the paper bin groove at the rear end of the paper feeding direction, the paper bin groove and the paper feeding through groove are provided with paper loading openings on the same side of the paper width direction, and the thermal printer further comprises a side cover which is connected with the base through the paper loading openings.

From top to bottom, it leads to the groove through the paper storehouse groove and the paper feed that set up the intercommunication, and set up dress paper opening on the same one side of paper width direction, then the printing paper of package can pull out one section tiling section, the printing paper of coiling section is adorned the paper storehouse groove, the printing paper of tiling section is adorned the paper feed and is led to the groove, and can be heat-sensitive piece and rubber roll separation when packing into, then beat printing paper and can slide into between heat-sensitive piece and the rubber roll without obstacle, after closing the side cap again, heat-sensitive piece is close to the centre gripping to the printing paper with the rubber roll, then can normally advance paper and print formation of image, through the heat-sensitive piece structural design that can retreat of dress paper mode cooperation of lateral part, simultaneously because heat-sensitive piece and rubber roll all set up on the base, simplify the opening structure and the structure of lid, need not remove by a.

Drawings

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

FIG. 2 is a block diagram of an embodiment of the handheld thermal printer of the present invention from another perspective.

FIG. 3 is a block diagram of an embodiment of a handheld thermal printer according to the present invention in an uncapped state.

FIG. 4 is a block diagram of an embodiment of the hand-held thermal printer of the present invention in a paper-loaded state.

Fig. 5 is an exploded view of a hand-held thermal printer according to an embodiment of the present invention.

FIG. 6 is a block diagram of a thermal assembly in an embodiment of the handheld thermal printer of the present invention.

FIG. 7 is a block diagram of a thermal assembly from another perspective in an embodiment of a handheld thermal printer according to the present invention.

FIG. 8 is an exploded view of a thermal assembly in an embodiment of the handheld thermal printer of the present invention.

FIG. 9 is a block diagram of a thermal assembly in a bottom-side view of a handheld thermal printer embodiment of the present invention.

Fig. 10 is a cross-sectional view of an embodiment of the hand-held thermal printer of the present invention at a cradle reset in a paper feeding direction in a closed state.

Fig. 11 is a cross-sectional view of an embodiment of the handheld thermal printer of the present invention at the joint in the paper width direction in a closed state.

Fig. 12 is a cross-sectional view of an embodiment of the handheld thermal printer of the present invention at the lock portion in the paper feeding direction in a closed state.

Fig. 13 is an exploded view of the side cover and locking member of the handheld thermal printer embodiment of the present invention.

Fig. 14 is a block diagram of a catch member in an embodiment of the handheld thermal printer of the present invention.

FIG. 15 is a diagram of a locking member engaging structure of the handheld thermal printer according to an embodiment of the present invention in a closed position.

FIG. 16 is a view showing the structure of the locking member of the handheld thermal printer according to the embodiment of the present invention in an uncapped state.

Fig. 17 is a block diagram of the locking member in the embodiment of the handheld thermal printer according to the present invention.

Fig. 18 is a cross-sectional view of an embodiment of the handheld thermal printer of the present invention at the lock portion in the paper feeding direction in the uncapped state.

Fig. 19 is a cross-sectional view of an embodiment of the hand-held thermal printer of the present invention at the joint in the paper width direction in the uncapped state.

Fig. 20 is a cross-sectional view of the handheld thermal printer embodiment of the present invention at the cradle reset in the paper feed direction in an uncapped state.

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

Detailed Description

Referring to fig. 1 to 4, the handheld thermal printer 1 includes a base 2, a side cover 25 and a side cover 3, the side cover 25 and the side cover 3 are respectively located on two opposite sides of the base 2, the side cover 25 is fixedly connected with the base 2, the side cover 3 is hinged to a side portion of the base 2 and can achieve an opening and closing function, printing paper 10 can be loaded into the base 2 from the side portion, and paper feeding printing can be achieved after the side cover is closed.

Referring to fig. 5, the base 2 includes a middle frame 21, an upper cover 241, and a lower cover 242, the middle frame 21 is provided with a paper compartment groove 211 and a paper feed through groove 212, the paper feed through groove 212 extends in the paper feed direction X, the paper feed through groove 212 and the paper compartment groove 211 both extend in the paper width direction Y, the paper feed through groove 212 is provided with a paper output port 225 at the front end in the paper feed direction X, the paper feed through groove 212 communicates with the paper compartment groove 211 at the rear end in the paper feed direction X, the paper compartment groove 211 and the paper feed through groove 212 are provided with a paper loading opening 213 on the same side in the paper width direction Y, that is, the paper loading opening of the paper compartment groove 211 and the paper loading opening of the paper feed through groove 212 are provided in communication, the middle frame 21 is provided with a side plate 228 on the paper compartment groove 211 and the paper feed through groove 212 in the paper width direction Y, the side plate 228 and the paper loading opening 213 are respectively located on opposite sides in the paper width direction Y, the side plate 228 connects the, the paper compartment slot 211 is a cylindrical slot with a bottom, and the paper feeding slot 212 is a narrow slot with a bottom.

The base 2 is provided with a wire accommodating groove 226 and a battery 23, the wire accommodating groove 226 is provided with a wire accommodating port on the same side of the paper loading opening 213, the wire accommodating groove 226 extends toward the paper width direction Y, the wire accommodating groove 226 is located on one side of the paper feed through groove 212 based on the paper thickness direction Z, and the battery 23 (see fig. 10) is located on the other side of the paper feed through groove 212 relative to the wire accommodating groove 226 based on the paper thickness direction Z.

The handheld thermal printer 1 comprises a main control circuit board 12, the main control circuit board 12 is electrically connected with a battery 23, the main control circuit board 12 is arranged on one side, based on the paper thickness direction Z, of a paper feeding through groove 212 of a middle frame 21, the main control circuit board 12 is arranged above a paper receiving groove 226 and fixed through screws, the main control circuit board 12 is provided with a key 122, a USB interface 121, a paper feeding key 124 and an annular light bar 123, the annular light bar 123 surrounds the paper feeding key 124, the paper feeding key 124 and the annular light bar 123 are arranged in the middle of the main control circuit board 12, the key 122 and the USB interface 121 are respectively arranged on two sides, the middle frame 21 is provided with a key hole 227 on one side of a paper loading opening 213, the key 122 is arranged in the key hole.

The handheld thermal printer 1 further includes a thermal component 4 and a rubber roller 223, the paper feeding through groove 212 is provided with an upper mounting position above the paper thickness direction Z, the paper feeding through groove 212 is provided with a lower mounting position below the paper thickness direction Z, and the upper mounting position and the lower mounting position are both close to the paper outlet 225. The lower mounting position is arranged in a mounting groove, the rubber roller 223 can be rotationally arranged in the axial direction, the rubber roller 223 is arranged in the paper width direction Y, the driving gear 222 is arranged at the axial end of the rubber roller 223, the driving gear 222 and the paper loading opening 213 are located on two opposite sides, the driving gear set 221 and the driving motor 220 are arranged on the same side of the driving gear 222, the driving motor 220 is electrically connected with the battery 23, the driving gear set 221 is connected between the driving motor 220 and the driving gear 222, under the driving action of the driving motor 220, the rubber roller 223 drives paper to move, printing and imaging can be completed, and the lower cover 242 covers the lower mounting position and is connected with the middle frame 21.

Referring to fig. 6 to 9 in combination with fig. 5, the heat-sensitive assembly 4 is disposed at the upper mounting position, the heat-sensitive assembly 4 includes a mounting bracket 41, a heat-sensitive sheet 42, a bracket returning member 46, a connecting member 43, a connecting returning member 44 and two springs 45, the mounting bracket 41 is provided with two hinge blocks 411 at a side facing away from the paper outlet 225, the hinge blocks 411 are provided with hinge holes, the middle frame 21 is provided with a fixing block 219 at an outer wall of the paper accommodating groove 226, the fixing block is also provided with hinge holes, a hinge shaft 224 passes through the hinge blocks 411 and the fixing block 219 in the paper width direction Y, so that the mounting bracket 41 is hinged to the middle frame 21, and the mounting bracket 41 can rotate in the paper thickness direction Z.

The mounting bracket 41 is provided with a mounting groove 417 and two limiting protrusions 418 at a lower side facing the rubber roller 223, the mounting groove 417 is located at a side close to the paper outlet 225, the mounting groove 417 is penetratingly provided along the paper width direction Y, the two limiting protrusions 418 are located at a side far from the paper outlet 225 and are respectively provided at both sides of the paper width direction Y, the thermal sensitive sheet 42 is arranged along the paper width direction Y, two sides in the paper width direction Y are respectively provided with two positioning protrusions 421 and two positioning grooves 422, the positioning grooves 422 are in spacing fit with the limiting protrusions 418, the positioning protrusions 421 are positioned in the mounting grooves 417, the positioning protrusion 421 has a certain moving space in the thickness direction Z in the mounting groove 417, the springs 45 are respectively disposed in the thickness direction Z, the two springs 45 are distributed in the width direction Y, the springs 45 are elastically abutted between the thermal sensitive strip 42 and the mounting bracket 41, and the springs 45 provide an elastic pressing force for the thermal sensitive strip 42.

The mounting bracket 41 is provided with two first engaging convex portions 412 and two escape concave portions 413 on the back side of the thermal sheet 42 in the paper thickness direction Z, the two first engaging convex portions 412 and the two escape concave portions 413 are both distributed in the paper width direction Y, the first engaging convex portion 412 is convex based on the plane of the mounting bracket 41, the escape concave portion 413 is concave based on the plane of the mounting bracket 41, and the escape concave portion 413 is located on one side of the first engaging convex portion 412 in the paper width direction Y. A guide slope 414 is provided between one fitting convex portion 412 and one escape concave portion 413, and the guide slope 414 is connected between the top surface of the fitting convex portion 412 and the bottom surface of the escape concave portion 413.

On the same side as the first fitting projection 412, the mounting bracket 41 is provided with a connecting groove 415, the connecting groove 415 being located on a rib of the mounting bracket 41, the rib extending in the paper width direction, the connecting groove 415 being located in the middle. The cradle reset piece 46 adopts a torsion spring, the hinge shaft 224 passes through the winding part of the cradle reset piece 46, the first end of the cradle reset piece 46 abuts on the middle frame 21, and the second end of the cradle reset piece 46 extends into the connecting groove 415, so as to apply an elastic acting force to the mounting cradle 41.

The connecting member 43 is arranged in a column shape and extends in the paper width direction Y, the outer wall of the connecting member 43 is provided with two second fitting protrusions 431, the two second fitting protrusions 431 are distributed in the paper width direction Y, and the first fitting protrusion 412 is provided with a guide inclined surface 432 on one side in the paper width direction Y.

The connector 43 is provided with an abutting portion 433 and a locking portion 215 at both ends in the paper width direction Y, respectively, the connector 43 is provided with an abutting portion 435 at the same end of the locking portion 215, the abutting portion 435 is located at the outermost end, and the locking portion 215 is provided in a catching groove arranged in the radial direction. The outer wall of the link 43 is provided with a stopper 436, and the stopper 436 is located near the side of the locking portion 215 between the locking portion 215 and the second fitting projection 431.

The middle frame 21 is provided with a positioning through hole 217 and a positioning blind hole 216 at an upper mounting position, the positioning through hole 217 is arranged in a penetrating mode and communicated with the positioning blind hole 216 along the paper width direction Y, the positioning through hole 217 is close to the paper loading opening 213, the positioning blind hole 216 is close to the side cover 25, the connecting piece 43 penetrates through the positioning through hole 217, the locking portion 215 and the abutting portion 435 penetrate through the positioning through hole 217 or are located in the positioning through hole 217, the connecting reset piece 44 is made of a spring, the abutting portion 433 and the connecting reset piece 44 are located in the positioning blind hole 216, and the connecting reset piece 44 is arranged along the paper width direction Y and elastically abutted between the abutting portion.

Referring to fig. 10 and 11, and fig. 19 and 20, since the link 43 is movable in the paper width direction Y and is brought into abutting engagement with the first engagement projection 412 via the second engagement projection 431, and the mounting bracket 41 is hinged to the base 2 and is rotatable in the paper thickness direction Z, the inward movement of the link 43 can drive the mounting bracket 41 and the heat-sensitive sheet 42 mounted on the mounting bracket 41 to move toward the rubber roller 223 and the heat-sensitive sheet 42 to oppose the rubber roller 223. When the connecting piece 43 moves outwards, the second matching convex part 431 moves to the avoiding concave part 413, and the upper support resetting piece 46 is matched with the upward elastic acting force of the mounting support 41, so that the mounting support 41 and the heat-sensitive sheet 42 are driven to move away from the rubber roller 223, and finally the heat-sensitive sheet 42 is separated from the rubber roller 223.

Referring to fig. 10 to 14, a hinge portion 31 is disposed at one end of the side cover 3, a limiting post 35 is disposed on one side of the side cover 3 opposite to the hinge portion 31, the limiting post 35 is provided with a connecting hole, the side cover 3 is provided with two second positioning grooves 33 inside, the two second positioning grooves 33 extend along the paper feeding direction X and are respectively located on two sides of the limiting post 35 in the paper thickness direction Z, the second positioning grooves 33 are provided with a first bottom wall 34, the side cover 3 is further provided with a sliding groove 36 in a penetrating manner, the sliding groove 36 extends along the paper feeding direction X, and the sliding groove 36 is close to the limiting post 35. The side cover 3 is provided with a positioning convex ring 32 at a position corresponding to the paper bin slot 211, and the positioning convex ring 32 is provided with a top surface facing to the paper width direction Y and used for limiting the printing paper and strengthening the side cover structure.

The handheld thermal printer further comprises a locking piece 51 and two locking resetting pieces 52, the locking piece 51 is provided with a first positioning groove 513 in the middle, the first positioning groove 513 extends along the paper feeding direction X, the limiting column 35 is in clearance fit with the first positioning groove 513, a limiting screw (not shown) is connected with the connecting hole, and the nut of the limiting screw is in limit fit with the locking piece 51. The hasp piece 51 is provided with two spacing strips 514, and two spacing strips 514 are located the both sides of first constant head tank 513 respectively, and spacing strip 514 is located second constant head tank 33 and moves along second constant head tank 33, and spacing strip 514 is the arc setting and forms spacing groove 517, and spacing groove 517 is provided with second diapire 515. The first bottom wall 34 is opposite to the second bottom wall 515, the first bottom wall 34 is located at a position closer to the hinge portion 31, the latch resetting member 52 is a spring, the latch resetting member 52 is located in the second positioning groove 33 and the limiting groove 517, and the latch resetting member 52 abuts between the first bottom wall 34 and the second bottom wall 515.

The locking member 51 is further provided with an operating portion 516, a locking portion 511 and a fitting portion 512, the operating portion 516 being located in the middle, the operating portion 516 passing through the slide groove 36 and being movable along the slide groove 36 when the locking member 51 is slidably disposed on the inner side of the side cover 3. The locking part 511 and the matching part 512 are respectively positioned at two sides of the first positioning groove 513 based on the paper thickness direction Z, and the locking part 511 is arranged in a buckling manner. The fitting portion 512 has an end surface facing the connecting member 43, and the fitting portion 512 has an end surface facing the connecting portion 532.

Referring to fig. 5, the middle frame 21 is provided with a hinge portion 214 near the paper compartment groove 211, the middle frame 21 is provided with a lock portion 215 near the paper discharge port 225, the hinge portion 214 is arranged in a groove shape, the hinge portion 31 of the side cover is hinged with the hinge portion 214, the side cover 3 rotates in the paper width direction Y, and the lock portion 215 is provided in a lock groove.

Referring to fig. 15 to 17 in conjunction with fig. 12, the middle frame 21 is provided with a first slide groove 231 and a second slide groove 218 communicating with each other on the side of the locking portion 215 opposite from the paper feed through groove 212, the second slide groove 218 is located on the inner side, the first slide groove 231 is located on the outer side, and the first slide groove 231 communicates with the positioning through hole 217.

The thermal printer 1 further includes a lock member 53 and a lock return member 54, the lock return member 54 is a spring, the lock member 53 is provided with a first slider 536 and a second slider 535, the first slider 536 is provided with a connecting portion 532 protruding toward the side cover 3, the first slider 536 is further provided with a locking portion 531, the locking portion 531 is arranged in a locking block, an outer periphery of the locking portion 531 is provided with an arc-shaped avoiding groove 534, the first slider 536 and the connecting portion 532 are provided in the first sliding groove 231 and are slidable therein, the second slider 535 is provided with a positioning post 533, the positioning post 533 and the first slider 536 are located on opposite sides in the paper feeding direction X, the first slider 536 is located on a side close to the connecting shaft 43, the second slider 535 is provided in the second sliding groove 218 and is slidable therein, the lock return member 54 is arranged in the paper feeding direction X and elastically abuts between the lock member 53 and the middle frame 21, and the lock return member 54 is provided in the second sliding groove 218, and is sleeved outside the positioning column 533, the locking member 53 is driven to move by moving the connecting portion 532, and the elastic force of the locking reset member 54 is used for further realizing that the clamping portion 531 of the locking member 53 is detachably clamped and connected with the locking portion 434 of the connecting member 43, meanwhile, the side cover 3 covers the paper loading opening 213, and the locking portion 511 is clamped with the locking portion 215. The closed state is as shown in fig. 10 to 12 and fig. 15. After the above-mentioned device has been assembled, the upper cover 241 covers and closes the installation position and outside and be connected with well frame 21, and upper cover 241 middle part position has the pilot hole, and paper feed button 124 and annular lamp strip 123 are located pilot hole department, can conveniently operate and use, also through circuit board, button and lamp strip integral type design, optimize assembly structure.

Referring to fig. 16, and fig. 18 to 20, when the side cover 3 is to be opened for loading, the operating portion 516 is pulled from the outside of the cover body 3 to move the locking member 51 in the opening direction, which is the same direction as the paper feeding direction in this embodiment, and as the locking member 51 is opened, the engaging portion 512 of the locking member 51 abuts against the connecting portion 532 of the locking member 53, which in turn drives the locking member 53 to move in the same direction, and at the same time, the locking portion 511 is separated from the locking portion 215, and the card portion 531 is also separated from the locking portion 434. Then, under the elastic force of the restoring member 44, the driving link 43 is ejected toward the side cover 3, the abutting part 435 is abutted with the matching part 512 to push the locking piece 51 and the side cover 3 to pop out, so that the side cover can be smoothly and smoothly opened, the limit block 436 is in limit fit with the positioning through hole 217 to prevent excessive popping out, and at the same time, since the second matching convex part 431 moves to the avoiding concave part 413 and the upper bracket resetting piece 46 drives the mounting bracket 41 and the thermal sensitive sheet 42 to move away from the rubber roller 223, so that the thermal sensitive sheet 42 is separated from the rubber roller 223, finally, referring to the paper loading mode of fig. 2, the printing paper 10 is pulled out of the one-section laying section 112, the winding section 111 of the printing paper 10 is loaded into the paper bin groove 211 from the paper loading opening 213, the lay-flat section 112 of the printing paper 10 is loaded into the paper-feeding through slot 212 from the paper-loading opening 213, and the lay-flat section 112 can be disposed between the heat-sensitive sheet and the rubber roller without hindrance.

Referring to fig. 10 to 12 in conjunction with fig. 15, the side cover 3 is closed, the engaging portion 512 of the locking member 51 pushes the connecting member 43 to extend inward as the closing of the side cover 3 advances, then the locking portion 531 engages with the locking portion 434, the locking portion 511 engages with the locking portion 215, and the side cover 3 covers the paper loading opening 213, and since the second engaging protrusion 431 is in abutting engagement with the first engaging protrusion 412, the mounting bracket 41 and the heat sensitive sheet 42 are driven to rotate in the paper thickness direction Z toward the glue roller 223, so that the heat sensitive sheet 42 is opposed to the glue roller 223 and clamps the printing paper, and then the paper feeding printing can be performed.

The above embodiment is only a preferred embodiment of the present application, and in practical application, the rubber roller may be disposed at the upper mounting position, the thermosensitive assembly may be disposed at the lower mounting position, and other structures may be adaptively changed according to the variation of the rubber roller and the thermosensitive assembly, so as to achieve the object. Certainly, a heat-sensitive sheet retraction structure is not arranged, and paper slides between the heat-sensitive sheet and the rubber roller when the paper is loaded from the side part.

Furthermore, for the relative arrangement of the first matching convex part, only a structure with height difference needs to be arranged on the mounting bracket, and a higher structure is used as the first matching convex part, namely, the first matching convex part can be a plane, and only one side of the first matching convex part needs to be provided with a groove, a concave part or an avoiding concave part, so that the second matching convex part can have the height difference in the process of advancing, and the heat-sensitive piece can be moved.

In addition, the mounting bracket can be connected with the base in a hinged mode, and can also be arranged with a corresponding sliding groove in a mode of sliding along the paper thickness direction, so that the mounting bracket and the thermosensitive plate can move along the paper thickness direction.

And, on some thermal printer models, such as a seat type or desktop type thermal printer, a paper bin groove or a paper bin can be omitted, an external paper bin or an external paper conveying mode is adopted, and a thermal sensitive sheet returning structure is matched, so that printing paper can smoothly pass through and is clamped by a thermal sensitive sheet and a rubber roller, and the purpose of the invention can be realized.

From top to bottom, it leads to the groove through the paper storehouse groove and the paper feed that set up the intercommunication, and set up dress paper opening on the same one side of paper width direction, then the beating of package is beaten paper and can be pulled out one section tiling section, the beating of coiling section is beaten paper and is adorned the paper storehouse groove, the beating of tiling section is beaten paper and is adorned paper feed and lead to the groove, and can slide in to between heat-sensitive piece and the rubber roll, can normally walk paper after the lid closes the side cap again and print the formation of image, dress paper mode through the lateral part, simultaneously because heat-sensitive piece and rubber roll all set up on the base, simplify the opening structure and the structure of lid, need not remove by a wide margin when adorn. Because need pull out one section of tiling section earlier when adorning paper, so set up articulated portion in the position department of being close to the paper storehouse groove, the locked portion is located paper exit department, so the opening of side cap and the rotation along the paper width direction have avoided the interference to package printing paper dress paper to improve dress paper convenience. Meanwhile, the whole volume of the handheld thermal printer is small, so that the paper feeding through groove is provided with the wire accommodating groove and the battery on two sides based on the paper thickness direction, and the wire accommodating groove is used for accommodating a charging wire or a data wire, so that the layout of devices is optimized, the space utilization rate is improved, and further miniaturization design of the printer is facilitated. And through the cooperation of well frame, upper cover and lower cover for each device of printer can conveniently be installed on well frame, and the lid of upper cover and lower cover closes and accomplishes the assembly, then makes things convenient for the installation assembly of each device. The side plates of the middle frame are arranged, so that the shapes of the paper bin groove and the paper feeding through groove are favorably kept, the peripheral integral structure is strengthened, the relative positions of the rubber roller and the thermosensitive plate are stabilized, and the printing stability is improved. In the open one side of side cap, the function button of main control circuit board can set up dress paper open-ended one side, not only realizes the hidden installation of button, also makes things convenient for the key operation after the side cap is opened.

In addition, through mobilizable connecting piece, with the second cooperation convex part with have the cooperation of first cooperation convex part to adjoin to, and the support resets and exerts the elastic force to the installing support, can realize then that connecting piece drive installing support and heat-sensitive piece move towards or keep away from the rubber roll, when the heat-sensitive piece kept away from the rubber roll, then can conveniently pass the paper feed logical groove in the beat paper of tiling form, after the heat-sensitive piece is close to the rubber roll and to the centre gripping of beat paper, can carry out the paper feed and print, the heat-sensitive piece of present case rolls back structural design, conveniently in the location of packing into of beat paper, but its adaptation is applied to handheld heat-sensitive piece printer, seat formula thermal printer, the outer defeated paper thermal printer of seat thermal transfer printer. Through the movement of the connecting piece in the paper width direction and the rotation of the mounting bracket in the paper thickness direction, the heat-sensitive sheet can be conveniently retracted or pushed, and the connecting operation of the connecting piece is convenient. The locking piece is connected with lock portion, can keep the position of connecting piece, keeps the relative position of installing support and temperature sensing piece then, improves operating stability, separates as locking piece and lock portion, and owing to connect the piece that resets and applys the elastic force along the paper width direction to the butt portion of connecting piece, the connecting piece pops out then, and temperature sensing piece separates with the rubber roll. The elastic pressing force of the locking reset piece on the locking piece is utilized, so that the locking of the locking piece on the connecting piece is improved, and the operation stability of the equipment is improved. The connecting piece is installed and positioned through the positioning through hole and the positioning blind hole, so that the connecting piece is stable to move and fix, and the end part of the connecting piece penetrates through the positioning through hole, so that the pushing operation of the connecting piece can be facilitated. Through the spacing cooperation of the stopper that is located inboard and the perforation of location, prevent that the transition of connecting piece from popping out, avoid breaking away from of connecting piece. The mounting bracket is provided with the first matching convex part and the avoiding concave part, so that the large height difference between the convex part and the concave part is utilized, and the movable range of the mounting bracket and the heat-sensitive sheet is enlarged. Through the arrangement of the guide inclined plane, the convex part which is convenient to move is matched, so that the stable movement of the mounting bracket and the heat sensitive sheet is realized. Because temperature sensing piece and rubber roll all extend along the paper width direction, through two at least cooperation convex parts that set up along the paper width direction to the balanced support of installing support, also provide balanced supporting platform to the temperature sensing piece.

Furthermore, a lock catch piece is arranged on the side cover in a sliding mode, and the side cover can be conveniently opened and closed and locked by the aid of the slidable lock catch piece for locking or unlocking. Not only carry out the installation location of hasp piece through first constant head tank cooperation spacing post and stop screw to and still slide spacingly through second constant head tank and spacing, still reset the piece through configuration hasp at second constant head tank and spacing inslot simultaneously, realize then that the restoration of hasp piece keeps the power with lasting elasticity. Can lock the position of connecting piece through the locking piece, and when opening the side cap, remove the hasp piece and drive the locking piece syntropy and remove, then make locking piece and connecting piece separation simultaneously, realize the unblock, the connecting piece also pops out the top-opening side cap along with popping out afterwards, and the optimization of its a series of linkage structure is uncapped and is felt, makes uncap and close the lid action more smooth.

Claims (10)

1. A thermal printer with a retractable thermal sensitive sheet is characterized by comprising a base, a thermal sensitive component and a rubber roller, wherein the base is provided with a paper feeding through groove along a paper feeding direction, and the thermal sensitive component and the rubber roller are respectively arranged on one side of the paper feeding through groove opposite to each other based on the paper thickness direction;

the temperature sensing subassembly includes installing support, temperature sensing piece, support piece and connecting piece that resets, the installing support is provided with first cooperation convex part, the connecting piece is provided with second cooperation convex part, second cooperation convex part with there is first cooperation convex part to adjoin the cooperation, the support piece elastic connection that resets be in the installing support with between the base, the temperature sensing piece is installed on the installing support, the temperature sensing piece with the rubber roll is relative, the removal drive of connecting piece the installing support with the temperature sensing piece orientation or keep away from the rubber roll removes.

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

the connecting piece can move along the paper width direction, and the mounting bracket is hinged with the base and can rotate in the paper thickness direction.

3. The thermal printer according to claim 2, wherein:

the connecting piece is in the both ends of paper width direction are provided with butt portion and lock portion respectively, thermal printer still resets and locking piece including connecting, connect and reset an elasticity butt and be in butt portion with between the base, the locking piece with lock portion detachable connects.

4. The thermal printer according to claim 3, wherein:

the thermal printer further comprises a locking reset piece, the locking piece is provided with a clamping block, the locking portion is arranged in a clamping groove, the locking reset piece is elastically abutted against the locking piece and the base, and the clamping block is detachably connected with the clamping groove.

5. The thermal printer according to claim 3, wherein:

the base is provided with location perforation and location blind hole, the location perforation be run through the setting and with the location blind hole is followed paper width direction intercommunication, the connecting piece passes the location perforation, butt portion with connect the piece that resets and all be located in the location blind hole.

6. The thermal printer according to claim 5, wherein:

the outer wall of connecting piece is provided with the stopper, the stopper is located the location perforate with between the blind hole of location, the stopper with the spacing cooperation of location perforation.

7. The thermal printer according to claim 2, wherein:

the mounting bracket is provided with an avoidance concave part on one side of the first matching convex part based on the paper width direction, and the second matching convex part can move to the avoidance concave part.

8. The thermal printer according to claim 1, wherein:

the first matching convex part and/or the second matching convex part are/is provided with a guide inclined surface.

9. The thermal printer according to any one of claims 1 to 8, wherein:

the temperature sensing piece, the connecting piece with the rubber roll all extends along the paper width direction, the installing support is followed the paper width direction is provided with two at least first cooperation convex parts, the connecting piece is followed the paper width direction is provided with two at least second cooperation convex parts.

10. The thermal printer according to any one of claims 1 to 8, wherein:

the base is provided with a paper bin groove, the front end of the paper feeding through groove in the paper feeding direction is provided with a paper outlet, the rear end of the paper feeding through groove in the paper feeding direction is communicated with the paper bin groove, and the paper bin groove and the paper feeding through groove are provided with a paper loading opening on the same side in the paper width direction;

the thermal printer further comprises a side cover which covers the paper loading opening and is connected with the base.

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