CN111421966A - Printer capable of preventing paper from being stuck - Google Patents

Abstract

The invention relates to a paper jam prevention printer, which comprises a main body and an upper cover body, wherein the upper cover body is pivoted on the main body and can rotate around a pivoting shaft so as to correspondingly open or close the printer; the main part and the upper cover body cover form the paper bin for storing printing paper, the paper feeding channel for printing paper and the printing paper output port in sequence after closing, the printing unit is arranged on the paper feeding channel, the main part and the upper cover body are in a triangular shape in the first direction, the paper bin is close to the pin joint shaft end, and the printer is arranged along the outer contour of the paper bin, and a control circuit board, a reduction gear set and a motor are obliquely arranged towards the printing unit direction to control or drive the printing unit to work. Due to the adoption of the technical scheme, the length of the paper feeding channel can be effectively reduced, so that paper jam or poor printing quality caused by overlong paper feeding channel in the printing and conveying process can be effectively reduced.

Description

Printer capable of preventing paper from being stuck

Technical Field

The invention relates to the technical field of thermal printers, in particular to a printer capable of preventing paper from being stuck.

Background

In a conventional thermal printer, a print module rotates a print roller with a recording paper sandwiched between the print roller and a thermal head, and heats a print surface of the recording paper by the thermal head while conveying the recording paper, thereby developing color on the print surface to perform printing. For example, a patent printing apparatus, with patent publication number CN103660622B, discloses the following main technologies: a printing apparatus is characterized by comprising: a print head that prints on one surface of a long-sized print medium, and forms a plurality of oblique lines having the same inclination angle on the other surface of the print medium at regular intervals; a transport roller for transporting the printing medium; a sensor arranged in front of the transport roller in a transport path of the print medium and configured to detect the oblique line; and a control unit that controls the print head so as to detect a deviation in a transport direction of the printing medium based on an interval between the oblique lines that are opposite to the transport direction of the printing medium and detected by the sensor, and controls a rotation pressure of the transport roller so as to correct the transport direction based on the deviation, thereby performing printing by changing a printing position on the printing medium.

The above-mentioned publication shows that the printing paper needs to be transported for a long distance to reach the position of the printing head for printing after coming out of the paper bin in the printing process, and the paper feeding path is still bent, which is more unfavorable for transporting the printing paper. The long distance of the paper feeding causes paper jam when the printing paper is fed, or the printing paper is flexible, so that the printing paper is fast and slow at the printing head due to the friction force on the paper feeding channel, thereby affecting the printing quality.

Disclosure of Invention

The invention discloses a paper jam prevention printer, which aims to solve the problem that the printing quality of the printer is influenced by overlong paper feeding channels.

The invention adopts the following scheme:

a paper jam prevention printer comprises a main body and an upper cover body, wherein the upper cover body is pivoted on the main body and can rotate around a pivoting shaft to correspondingly open or close the printer; after the main body and the upper cover body are covered, a paper bin for storing printing paper, a paper feeding channel for the printing paper and a printing paper output port are sequentially formed, and a printing unit is arranged on the paper feeding channel; the main body and the upper cover body are covered to form a prism body with at least four prisms, the output port and the pivot shaft are respectively positioned on two nonadjacent prisms, and the joint surface of the output port and the pivot shaft is positioned between the two nonadjacent prisms and cuts the printer along the prism direction; the main body and the upper cover body are triangular in the first direction, and the paper bin is close to the pivoting shaft end; the printer is obliquely provided with a control circuit board, a reduction gear set and a motor which are used for controlling or driving the printing unit to work along the outer contour of the paper bin towards the direction of the printing roller.

As a further improvement, the printing unit includes a thermal head and a printing roller which are oppositely arranged, one of which is arranged on the upper cover body, and the other of which is arranged on the main body.

As a further improvement, an upper cavity forming the paper bin is arranged on one side, close to the pivot shaft, of the upper cover body, and a control circuit board is arranged on the back face of the upper cavity and is obliquely arranged towards the output port along the top of the upper cavity.

As a further improvement, the main part includes base and lower casing, the base is close to one side of pin joint axle is equipped with the formation the lower cavity in paper storehouse, down the back of cavity is from high toward keeping away from pin joint axle direction slope is equipped with battery, motor and reduction gear group in proper order, reduction gear group with the print roller is connected.

As a further improvement, an adjusting mechanism for fixing printing paper with different widths is arranged in the lower cavity of the main body.

As a further improvement, the adjusting mechanism comprises a moving rod and a blocking piece arranged on the moving rod, the blocking piece can move along the moving rod, and the moving rod is parallel to the pivot shaft.

As a further improvement, the length of the paper feeding channel is less than 3.0 cm.

As a further improvement, a detection device for detecting the printing paper information is arranged on the paper feeding channel.

As a further improvement, the detection device comprises a transmitting unit and a receiving unit, one of which is arranged on the main body, and the other of which is arranged on the upper cover body.

As a further improvement, a cutter for cutting the printing paper is arranged at the output port.

By adopting the technical scheme, the invention can obtain the following technical effects:

1. according to the invention, the printing paper output port and the pivot shaft are arranged at two ends of the same diagonal line, so that more space can be reserved for the paper bin, and more printing paper can be accommodated at one time.

2. According to the invention, the motor and the reduction gear set for driving the printing roller to rotate are obliquely arranged between the printing roller and the top or the bottom of the paper bin so as to reduce the length of the paper feeding channel and further improve the printing quality of the printer.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the first direction projection of the present invention;

FIG. 3 is a schematic structural diagram of the upper cover body after being turned over;

FIG. 4 is an exploded view of the upper cover of the present invention;

FIG. 5 is an exploded view of the upper bracket of the present invention;

FIG. 6 is a schematic view of the upper bracket of the present invention from a first perspective;

FIG. 7 is an exploded view of the upper bracket of the present invention from a first perspective;

FIG. 8 is a schematic exploded view of the main body of the present invention;

FIG. 9 is a schematic cross-sectional view A-A of FIG. 2 of the present invention;

FIG. 10 is a schematic view of a first perspective of the subject invention;

FIG. 11 is a schematic cross-sectional view of the adjustment mechanism of FIG. 10B-B shown in FIG. 10 with the adjustment mechanism locked;

FIG. 12 is a schematic cross-sectional view of the adjustment mechanism of FIG. 10B-B of the present invention shown unlocked;

icon: 1. a main body; 2. an upper cover body; 3. an output port; 4. a button; 5. a paper bin; 6. an adjustment mechanism; 7. a thermal head; 8. a print roller; 9. a cutter; 11. a base; 12. a lower housing; 13. a V-shaped decorative piece; 21. an upper bracket; 22. an upper housing; 23. a decorative member; 51. an upper cavity; 52. a lower cavity; 61. a travel bar; 62. a baffle plate; 63. a control lever; 71. a support portion; 72. an elastic member; 91. a fixing hole; 92. a square hole; 100. a pivot shaft; 101. a transmitting unit; 102. a receiving unit; 103. a connecting shaft; 111. a battery; 112. a motor; 113. a reduction gear set; 114. a hinge portion; 200. a diagonal line; 211. a separator plate; 212. a reinforcing strip; 213. a control circuit board; 214. a hinged tube; 215. an accommodating chamber; 216. a wire guide groove; 521. a sliding groove; 522. a fixed block; 621. mounting grooves; 622. a limiting block; 623. a groove; 624. an inner wall; 625 a reinforcing part; 631. a protrusion; 1141. a hole of abdication; 2111. fixing a column; 2112. positioning blocks; 2121. a projection; 2141. a wire hole; 2151. a limiting groove; 2152. a stop bar; 2153. and (6) mounting the column.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

The first direction in the present invention is the X direction and the-X direction in the drawing, the second direction is the Y direction and the-Y direction in the drawing, and the third direction is the Z direction and the-Z direction in the drawing.

The structure and function of the solution of the present application will now be described in detail with reference to fig. 1 to 12.

With reference to fig. 1 to 3, the present embodiment provides a printer, which includes a main body 1 and an upper cover 2, the upper cover 2 is pivoted to the main body 1 and can rotate around a pivot shaft 100 to open or close the printer correspondingly, the main body 1 and the upper cover 2 cover a paper compartment 5 for storing printing paper and a printing paper output port 3, a printing unit is disposed on the paper feeding channel, and the printing unit includes a printing roller 8 and a thermal head 7 which are disposed oppositely. As shown in fig. 1 and 2, the main body 1 and the upper cover 2 are covered to form a prism with four prisms, and the joint surface formed by covering the main body 1 and the upper cover 2 is located between two opposite prisms and cuts the printer along the prism direction. The printer also comprises a control button 4, the control button 4 and the pivot shaft 100 are arranged on one of the two prisms, and a printing paper output port 3 is arranged on the other prism. The pivot shaft 100 passes through the control button 4. The printer is provided with a pivot shaft 100, a paper bin 5 for containing printing paper, a paper feeding channel, a printing area formed by oppositely arranging a thermal head 7 and a printing roller 8 and a printing paper output port 3 along a combining surface in sequence. In this embodiment, a quadrangular prism is preferred, and the concept of the present invention may be applied to other prisms, such as a pentagonal prism, where the junction surface of the quadrangular prism passes through two non-adjacent prisms.

As shown in fig. 2, the main body 1 and the upper cover 2 are triangular in the first direction, and one of the preferred embodiments of the present invention is triangular with right angles, and the right angles have circular chamfer angles to prevent sharp edges and easy scratching. The main body 1 and the upper cover 2 are covered and projected in a substantially square shape in a first direction, the two prisms are connected in the first direction to form a diagonal line 200, and the pivot shaft 100 and the printing paper output port 3 are respectively located at both ends of the diagonal line 200, that is, on the two prisms. The printer is a regular body or an approximate cube as a whole. In this embodiment, the printer is a cube, most of the joint surface of the main body 1 and the upper cover 2 after covering is overlapped with the diagonal line 200, and the paper bin 5 is close to the pivot shaft 100, so that the space at the front end of the printer can be effectively utilized to arrange other functional components. Due to the adoption of the shape and the structural layout of the printer, the volume of the paper bin can be increased to 40-70% of the volume of the printer. Therefore, the printing paper amount placed in the paper bin can be maximized.

Referring to fig. 4, the upper cover 2 includes an upper bracket 21, an upper case 22 for wrapping the upper bracket 21, and a decoration 23 for decorating the upper case 22. The shape of the upper bracket 21 is similar to a bucket, the projection of the middle end of the thermal head 7 in the first direction is arranged at the front end of the upper bracket and is in a semicircular arc shape, the upper cavity 51 for placing printing paper is used for matching and installing a winding drum with the printing paper, and the projection of the rear end in the first direction is in a cylindrical shape and is used as a hinged pipe 214 for connecting the printer main body 1 and the upper cover body 2. The projection of the upper casing 22 in the first direction is approximately triangular, and the top is a right angle with a circular arc chamfer, the upper bracket 21 can be completely accommodated in the upper casing 22, the front end of the upper casing 22 is provided with a square opening for printing paper output port 3, and the rear end of the upper casing 22 is a circular arc chamfer to match the hinged pipe 214 of the upper bracket 21, and the upper cover 2 can have a sufficient opening angle to facilitate installation of a roll of printing paper without mutual interference with the main body 1. The projection of decoration 23 on the first direction is the V type in order to match the two right-angle sides of casing 22, and decoration 23 can select different colours according to different hobbies for use, makes the appearance of printer more pleasing to the eye, and can select different materials such as metal film material in order to increase the intensity of printer, prevents that the printer from crushing easily because the size is small and exquisite.

Referring to fig. 1 and 3, after the main body 1 and the upper cover 2 are closed, a projection in the first direction is substantially square, the pivot shaft 100 is disposed on the center of the hinge pipe 214 at the end of the substantially square diagonal line 200 and extends in the first direction, the printer is further provided with the control button 4, the control button 4 is disposed on the side surface of the printer, and the pivot shaft 100 is perpendicular to the side surface and passes through the control button 4, so that the length of the electrical connection path between the control button 4 and the upper cover 2 or the main body 1 and the wire material can be reduced, and the assembly is easier. The output port 3 of the printer is arranged on the other end part of the diagonal line 200 and is arranged in parallel with the pivot shaft 100, so that the output port 3 of the printer is divided into an upper part and a lower part when the main body 1 and the upper cover body 2 are opened so as to facilitate the installation of printing paper, and the front end of the printing paper is stretched to the position of the output port 3 of the printing paper.

Referring to fig. 4 and 5, when the upper frame 21 is disposed in the upper housing 22, since the upper cavity 51 is disposed at the rear end of the upper frame 21, after the upper frame 21 is matched with the upper housing 22, the front end of the upper frame has a certain space for placing other components, so that the printer has a smaller size and is convenient to carry. An upper cavity 51 forming the paper bin 5, namely, a middle-end semicircular arc of the upper support 21, is arranged on one side of the upper cover body 2 close to the pivot shaft 100, a control circuit board 213 is arranged on the back surface of the upper cavity 51 and used for controlling printing of the thermal head, four support columns are arranged on the upper support 21 on the back surface of the upper cavity 51 to fix the control circuit board 213, preferably, the support columns are respectively fixed on the periphery of the control circuit board 213, the control circuit board 213 is arranged in parallel with the surface of the upper shell 22 opposite to the surface of the upper shell at the downward inclination angle of the arc surface, the support columns on the arc top are longer, the support columns on the arc bottom are shorter, the control circuit board 213 is arranged in an inclined mode along the top of the upper cavity 51 to the output port 3 so as to compactly and reasonably utilize the inner space of. The control circuit board 213 is electrically connected to the control button 4, and the control circuit board 213 is controlled by the control button 4 to turn on or off the printer.

Referring to fig. 5 and 6, connecting arms extending forward on both sides of the front end of the upper frame 21 are provided with a partition plate 211, so that the partition plate 211 and the upper frame 21 form a receiving cavity 215 for mounting the thermal head 7 on the inner side, and a cutter 9 is fixed on the outer side of the partition plate 211 for cutting and separating the printed printing paper from the printer. The partition plate 211 separates the thermal head 7 and the cutter 9 to prevent static electricity on the cutter 9 from affecting the printing quality of the thermal head 7 on the printing paper. It can be understood that the cutter 9 is basically made of a metal material, and the front end of the cutter 9 is exposed to air for a long time, and static electricity is easily accumulated during use. If the partition board 211 is not arranged between the cutter 9 and the thermal head 7, the cutter 9 is easy to generate static electricity to influence the printing quality of the thermal head 7 on printing paper, and the thermal head 7 is arranged in the accommodating cavity 215, so that the static electricity on the cutter 9 can be reduced to be transmitted to the thermal head 7, and the printing quality is improved. In this embodiment, it is preferable that the isolation plate 211 and the upper bracket 21 are integrally formed by a resin material, preferably, an insulating resin material.

A positioning block 2112 and a fixing column 2111 are arranged on one side of the upper shell 22 above the isolation plate 211, and a square hole 92 matched with the positioning block 2112 is arranged on the cutter 9 to limit the left and right movement of the cutter 9 when cutting printing paper, so that the paper cutter is convenient to use. The cutter 9 is fixed on the isolation board 211 through the fixing column 2111 in a hot melting mode, the interior of the printer is generally formed by plastic injection, the isolation board 211 is also formed by plastic injection, the thickness of the cutter 9 is thinner, a plurality of fixing holes 91 are formed in the cutter 9, the fixing columns 2111 are melted on the fixing holes 91 through the hot melting mode, the cutter 9 is fixed on the isolation board 211, the cutter 9 and the isolation board 211 are integrated, and the cutter 9 is prevented from falling off due to vibration of a thermal head 7 in the printing process. Of course, other fastening means such as screws may be used. The partition 211 is close to the output port 3, which enables the serrated end of the cutter 9 to protrude out of the output port 3 to cut and separate printed printing paper. A stopper 2152 for preventing the printing paper from entering the housing chamber 215 when the printing paper is retracted is provided on the side of the partition plate 211 facing the housing chamber 215 of the thermal head 7. Specifically, because thermal head 7 can vibrate from top to bottom at the printing in-process, consequently thermal head 7 installs the front end that holds in chamber 215 and can not butt division board 211, and have the gap between division board 211, after printing paper printing has been finished cutting the separation back through cutter 9 like this, the foremost end of printing paper can beat printing paper delivery outlet 3 parallel and level, because beat printing paper and cut and be the pull-up, beat printing paper and roll back in-process front end and can upwards curl up, make easily beat printing paper front end and get into from the gap and hold chamber 215, and set up shelves strip 2152 on division board 211, beat printing paper after having prevented to print once more and roll up the possibility that holds chamber 215, thereby prevent the card paper jam. Preferably, there are a minimum of 4 bars 2152, and the bars 2152 are spaced apart, so that there are multiple supporting points when the printing paper is retracted, which can greatly reduce the possibility that the printing paper enters the accommodating chamber 215 when the printing paper is retracted, and thus cause a paper jam.

Referring to fig. 5 and 7, a limit groove 2151 is formed in the printing paper accommodating chamber 215, support portions 71 matched with the limit groove 2151 are formed at both ends of the thermal head 7, and the front and rear movement of the thermal head 7 is limited by the cooperation of the limit groove 2151 and the support portions 71. An elastic member 72 is arranged between the isolation plate 211 and the thermal head 7, a mounting post 2153 is arranged on the isolation plate 211, and the elastic member 72 is mounted in the mounting post 2153 to provide downward pressure for the thermal head 7, so that the thermal head 7 and the printing roller 8 clamp printing paper to print pictures. A reinforcing strip 212 for increasing the strength of the front end of the upper support 21 is arranged in the accommodating cavity 215, and preferably, the reinforcing strip 212 is made of hard metal material, so that the influence on the output of printing paper due to the change of the height of the paper feeding channel caused by the deformation of the front end of the upper support 21 caused by the heating of the thermal head 7 is prevented. The reinforcing bar 212 is further provided with a projection 2121 which abuts against the rear end of the thermal head 7, so that the thermal head 7 is balanced in the abutment of the elastic member 72 and the projection 2121, and the thermal head 7 is prevented from tilting back and forth.

Referring to fig. 8, the main body 1 includes a base 11 and a lower case 12, and has a triangular shape in a first direction similarly to the upper frame 21 and the upper case 22, and a V-shaped garnish 13 is also provided outside the lower case 12. One side of the base 11 close to the pivot shaft 100 is provided with a lower cavity 52 of the paper bin 5, the back of the lower cavity 52 is sequentially provided with a battery 111, a motor 112 and a reduction gear set 113 from high to far away from the pivot shaft 100, the length of the printer extending forwards can be reduced by the inclined arrangement, the size of the printer is favorably reduced, and the printer is more compact in structure and more convenient to carry. The printing roller 8 is fixed on the base 11 near the output port 3, the printing roller 8 is connected with the reduction gear set 113, the reduction gear set 113 is driven to rotate by the motor 112 so as to drive the rotation of the printing roller 8, and the printing is carried out by the rotation of the printing roller 8 and the clamping of the thermal head 7 so as to convey the printing paper forwards. Two hinge parts 114 are provided on the base 11, the hinge parts 114 and the hinge pipe 214 of the upper frame 21 are coaxially provided with the pivot shaft 100 and rotatably connected together through the connecting shaft 103, and the hinge pipe 214 is connected together with the hinge parts 114 at both sides through the connecting shaft 103 so that the main body 1 and the upper cover 2 can rotate along the pivot shaft 100. The connecting shaft 103 is a hollow shaft, and the middle part of the connecting shaft can allow a conductive wire body to pass through.

Referring to fig. 8 and 9, the hinge tube 214, the hinge portion 114 and the connecting shaft 103 are all hollow, so that the electric wire can pass through the hinge tube 214, the hinge portion 114 and the connecting shaft 103, in order to make the main body 1 and the cover have a threading path and not expose the electric wire for enhancing the appearance, the hinge portion 114 of the base 11 is provided with an abdicating hole 1141 for passing the electric wire through the connecting motor 112, and the abdicating hole 1141 is provided on the other side opposite to the control button 4, so that the limited internal space of the printer can be more reasonably arranged and utilized. A wire hole 2141 for passing a wire is formed in the middle of the hinge pipe 214 so that the control circuit board 213 of the upper cover 2 and the control button 4 can be electrically connected together to control the printer.

Specifically, the electric wire connected to the motor 112 on the base 11 is electrically connected to the control circuit board 213 through the abdicating hole 1141 to control the opening of the printer, and the electric wire connected to the control circuit board 213 of the upper cover 2 is connected to the control button 4 through the electric wire hole 2141 and the connecting shaft 103 to transmit the control information to the control circuit board 213 to start printing.

Referring to fig. 3, 6 and 10, after the main body 1 and the upper cover 2 are closed, a paper bin 5 for storing printing paper, a paper feeding channel for the printing paper, a printing area formed by oppositely arranging the thermal head 7 and the printing roller 8, and a printing paper output port 3 are sequentially formed, wherein the paper feeding channel is directly formed by the upper surface of the main body 1 and the lower surface of the upper cover 2 and is used for connecting the paper bin 5 with the printing area, and the length of the paper feeding channel can be reduced by obliquely arranging a circuit control board in the upper cover 2 and a battery 111, a motor 112 and a reduction gear set 113 in the main body 1, generally, the length of the paper feeding channel can be smaller than 3.0cm, so that the problems of paper jam, paper inclination or slow transmission speed possibly caused by overlong printing paper feeding channel can be reduced, and the printing quality can be improved.

A detection device for detecting the information of the printing paper is arranged on the paper feeding channel, the detection device comprises a transmitting unit 101 and a receiving unit 102, one of the transmitting unit 101 and the receiving unit 102 is arranged on the main body 1, the other is arranged on the upper cover body 2, the transmitting unit 101 transmits the information to the receiving unit 102 when detecting that the printing paper passes through the paper feeding channel, and the receiving unit 102 provides the information to the control circuit board 213 after receiving the information.

Referring to fig. 10, a paper width adjusting mechanism 6, a moving bar 61, and a sliding slot 521 are provided on the lower chamber 52, and the paper width adjusting mechanism 6 is provided on the moving bar 61 and is movable along the moving bar 61 and the sliding slot 521 to accommodate printing paper of different paper widths. The movable rod 61 traverses the entire width of the lower cavity 52 and is fixed on both sides of the lower cavity 52, the lower end of the sliding groove 521 is a circular arc-shaped curved surface, and the upper end is a linear plane, so that the lower end can better slide when the paper width adjusting mechanism 6 is unlocked, and the upper end can be better limited when the paper width adjusting mechanism 6 is locked.

The adjusting mechanism 6 comprises a blocking piece 62 and a control rod 63, the blocking piece 62 is arranged on the moving rod 61 and can move left and right along the moving rod 61, specifically, a through hole for the moving rod 61 to pass through is arranged at the front end of the blocking piece 62, the blocking piece 62 is sleeved on the moving rod 61, the shape of the blocking piece 62 is consistent with that of the sliding groove 521, and the rear end of the blocking piece 62 is clamped in the sliding groove 521 and can move along a first direction when in use. The lower end of the baffle plate 62 is provided with an arc-shaped part matched with the lower cavity 52 so that the baffle plate 62 is tightly attached to the lower cavity 52. The stopper piece 62 is provided with a mounting groove 621 for the control lever 63, the control lever 63 is mounted in the mounting groove 621 and pivotally connected to the moving rod 61, and the stopper piece 62 is locked by the control lever 63 and fixed to the moving rod 61. Specifically, referring to fig. 11 and 12, a limiting block 622 is disposed in the mounting groove 621, when the control rod 63 swings downward, the control rod 63 contacts against an inner wall 624 of the mounting groove 621 in an interference fit manner to fix the stopper 62 on the moving rod 61, and simultaneously, the rear end of the stopper 62 contacts against the sliding groove 521 to limit the stopper 62 from moving in the second direction. In order to prevent the control rod 63 from swinging back, a stop block 622 is disposed in the mounting groove 621, and when the control rod 63 swings down to the locking stop piece 62, the stop block 622 just abuts against the side wall of the control rod 63 to prevent the control rod 63 from swinging back by rotating around the moving rod 61. When the control rod 63 swings upwards, the control rod 63 is in clearance fit with the inner wall 624 of the mounting groove 621, so that the moving rod 61 and the blocking piece 62 are unlocked, the blocking piece 62 can move along the moving rod 61, two inclined grooves 623 are further arranged in the mounting groove 621, the control rod 63 is provided with a protrusion 631 matched with the two grooves 623, the protrusion 631 is elastically connected to the control rod 63, the control rod 63 can rotate under the action of external force, otherwise, the protrusion 631 abuts against the side wall of the groove 623 to fix the control rod 63. The mode that moves along carriage release lever 61 and sliding tray 521 through adjustment mechanism 6 adapts to the printing paper of different paper widths, locks washer 62 by control lever 63 again, through washer 62 and control lever 63 interference fit's mode direct lock carriage release lever 61 to the regulation of the printing paper width of having realized paper storehouse 5 is fixed, and the back of adjusting is beaten printing paper stable fixed like this, easy operation simultaneously.

As shown in fig. 10, the stopper piece 62 is formed with a mounting groove 621 of the lever 63 so that a portion of the stopper piece 62 which contacts against the moving bar 61 in the interference fit is too small, and a reinforcing portion 625 is formed in the stopper piece 62 extending in the direction of the moving bar 61 in order to prevent looseness, and the reinforcing portion 625 has a curved surface which is fitted against the fixed moving bar 61 so that the reinforcing portion 625 completely contacts against the moving bar 61 when the lever 63 locks the stopper piece 62.

If the width of the printing paper width is too small, the width of the paper feeding path is not changed during the printing process, and the smaller the width of the printing paper is, the more easily the deviation occurs on the paper feeding path, so that errors can occur during printing, and the printing quality is affected, so that the minimum paper width needs to be set. The sliding groove 521 is provided with a fixing block 522 to limit the movement of the blocking piece 62 so as to form the printing paper bin 5 with a minimum paper width. The moving rod 61 and the upper surface of the lower cavity 52 form a limiting channel for limiting the printing paper to move in a mess, and the limiting channel is connected with the paper feeding channel so that the printing paper can be more smoothly transmitted towards the printing roller.

The step for accommodating the adjusting mechanism 6 is arranged on the side edge of the upper bracket 21, the back of the step is provided with a wire groove 216 through which a wire passes, so that the wire connected through the control button 4 or the main body 1 is arranged in the wire groove 216, the neatness of the wire is facilitated, and the wire can be prevented from being damaged due to the fact that the wire is easily rubbed with the upper shell 22 when being exposed on the side edge.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above-mentioned embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention.

Claims (10)

1. A paper jam prevention printer comprises a main body and an upper cover body, wherein the upper cover body is pivoted on the main body and can rotate around a pivoting shaft to correspondingly open or close the printer; after the main body and the upper cover body are covered, a paper bin for storing printing paper, a paper feeding channel for the printing paper and a printing paper output port are sequentially formed, and a printing unit is arranged on the paper feeding channel; it is characterized in that the preparation method is characterized in that,

the main body and the upper cover body are covered to form a prism body with at least four prisms, the output port and the pivot shaft are respectively positioned on two nonadjacent prisms, and the joint surface of the output port and the pivot shaft is positioned between the two nonadjacent prisms and cuts the printer along the prism direction;

the printer is characterized in that the main body and the upper cover body are triangular in the first direction, the paper bin is close to the pivoting shaft end, and a control circuit board, a reduction gear set and a motor for controlling or driving the printing unit to work are obliquely arranged along the outline of the paper bin towards the direction of the printing unit.

2. The paper jam prevention printer of claim 1 wherein the print unit includes a thermal head and a print roller disposed in opposition, one of which is disposed on the upper cover and the other of which is disposed on the main body.

3. The anti-jamming printer according to claim 1, wherein an upper cavity forming the paper bin is arranged on one side of the upper cover body close to the pivot shaft, a control circuit board is arranged on the back of the upper cavity, and the control circuit board is obliquely arranged along the top of the upper cavity to the output port.

4. The printer of claim 1, wherein the main body comprises a base and a lower housing, a lower cavity forming the paper bin is arranged on one side of the base close to the pivot shaft, a battery, a motor and a reduction gear set are sequentially arranged on the back of the lower cavity from the high side to the printing roller in an inclined manner, and the reduction gear set is connected with the printing roller.

5. The jam resistant printer as recited in claim 4 wherein the lower chamber of the main body has an adjustment mechanism for holding different width printing paper.

6. The anti-jamming printer according to claim 5, wherein the adjustment mechanism includes a movable bar and a stop on the movable bar, the stop being movable along the movable bar, the movable bar being parallel to the pivot axis.

7. The anti-jam printer of claim 1, wherein the length of the paper path is less than 3.0 cm.

8. The paper jam prevention printer of claim 1 wherein the paper feed path is provided with a detection device for detecting information of the printing paper.

9. The anti-jam printer of claim 1, wherein the detection device includes a transmitter unit and a receiver unit, one of which is disposed on the main body and the other of which is disposed on the upper cover.

10. The anti-jam printer of claim 1, wherein the output port has a cutter for cutting the print paper.

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