Thermal printer capable of elastically supporting paper roll

Abstract

The utility model provides a thermal printer capable of elastically supporting a paper roll, which is characterized in that at least one side of a paper bin in the paper width direction is provided with a supporting mounting groove, the supporting mounting groove extends along the vertical direction, and one side of the supporting mounting groove facing the paper bin in the paper width direction is provided with a through groove; a supporting module of the supporting assembly comprises a base, a supporting arm and an elastic piece, the base is provided with a containing groove extending in the vertical direction, a notch is formed in the side, close to the paper bin, of the containing groove in the paper width direction, the upper portion of the containing groove is provided with a first hinge part, the upper portion of the supporting arm is provided with a second hinge part, and the first hinge part is hinged to the second hinge part; a supporting part is arranged on the lower portion of the supporting arm, the supporting arm extends into the paper bin in the paper width direction, and the elastic piece is located in the containing groove and connected between the supporting arm and the base in an abutting mode. The base is installed in the supporting installation groove from the installation opening, and the supporting arm can elastically rotate in the through groove, the groove opening and the containing groove. Through cooperation of the rotatable supporting arm and the elastic piece, the roll core is convenient to disassemble and assemble.

Description

Technical Field

[0001] The utility model relates to the field of thermal printing, in particular to a thermal printer with an elastically supported paper roll. Background Art

[0002] With the popularization of thermal printers, they are used in bank ATMs, supermarket cash registers, e-commerce delivery offices, restaurants or kitchens, etc. When the printing paper is exhausted, the cover needs to be opened for replacement. During this process, the support shaft and the winding core need to be removed together, and then the support shaft needs to pass through the new printing paper and then assembled in the paper bin of the printer. However, the separated support shaft is easy to lose, which affects the normal support use and is inconvenient to disassemble and assemble. Utility Model Content

[0003] The utility model aims to provide a thermal printer which elastically supports a paper roll.

[0004] In order to achieve the purpose of the utility model, the utility model provides a thermal printer that elastically supports a paper roll, including a base, a cover body, a rubber roller, a thermal sheet and a support assembly, one of the rubber roller and the thermal sheet is arranged on the base, the other of the rubber roller and the thermal sheet is arranged on the cover body, the thermal sheet and the rubber roller are opposite to each other and form a paper feeding channel, the base is provided with a paper bin, the paper feeding channel is connected to the paper bin, and the cover body covers the paper bin; the paper bin is provided with a support installation groove on at least one side of the paper width direction, the support installation groove extends in the vertical direction, a loading port is provided vertically above the support installation groove, and the support installation groove is provided on the side of the paper width direction facing the paper bin. The support assembly includes at least one support module, which includes a base, a support arm and an elastic member. The base is provided with a storage slot extending in a vertical direction, and a notch is provided on the side of the storage slot close to the paper bin in the paper width direction. A first hinge is provided at the upper part of the storage slot, and a second hinge is provided at the upper part of the support arm. The first hinge is hinged to the second hinge, and a support portion is provided at the lower part of the support arm. The support arm extends into the paper bin along the paper width direction, and the elastic member is located in the storage slot and abuts between the support arm and the base. The base is installed from the loading port into the support installation slot, and the support arm can rotate elastically in the over-slot, the notch and the storage slot.

[0005] A further solution is that the base is provided with first side walls on both sides of the storage slot based on the paper length direction, the first hinged portion is located at the upper part of the first side wall, and the support arm is located between the two first side walls; the support installation slot is provided with positioning protrusions on both sides of the slot based on the paper length direction, and the positioning protrusions on the same side are limitedly matched with the first side wall.

[0006] A further solution is that the support arm is provided with second side walls on both sides of the paper length direction, the second hinged part is arranged on the upper part of the second side wall, and the two second side walls are located between the two first side walls; the first side wall is provided with a guide groove, and the second side wall is provided with a guide block, the guide block is located in the guide groove and cooperates with the guide groove gap.

[0007] A further solution is that the base is provided with a first bottom wall at the lower part, the first bottom wall is connected between the two first side walls, and the first bottom wall is fixedly connected to the second bottom wall of the support mounting groove.

[0008] A further solution is that the elastic member is a spring, which is arranged along the paper width direction and abuts between the support arm and the base.

[0009] A further solution is that a third side wall is provided on the side of the storage slot away from the paper bin in the paper width direction, and the third side wall is connected between the two first side walls; a positioning column is provided on the support arm, a spring is sleeved outside the positioning column, and the spring abuts between the support arm and the third side wall.

[0010] A further solution is that the paper bin is provided with support installation grooves on both sides in the paper width direction, and one support installation groove is installed with a support module.

[0011] A further solution is that the support portion is provided with a convex arc surface at the upper part, and the central angle of the convex arc surface is less than 180°; the support portion is provided with a conical guide surface at the lower part, the tip of the conical guide surface faces the paper bin, and the central angle of the arc contour of the wide end of the conical guide surface is greater than 180°.

[0012] A further solution is that the outer end of the convex arc surface in the paper width direction is connected to the tip through a straight wall extending in the vertical direction.

[0013] The beneficial effect of the utility model is that, through the cooperation of the rotatable support arm and the elastic member, the support arm can retreat and avoid when loading or removing the printing paper roll, and the support arm bounces outward from the roll core part, and then the paper roll is supported by the support part. In addition, the positioning convex edge limits the first side wall and the fixed connection of the bottom wall can improve the installation stability of the support module, and the clearance cooperation of the guide block and the guide groove can make the rotation of the support arm more stable. Furthermore, the convex arc surface is used to support the roll core, and when disassembling, the roll core and the inclined surface of the conical guide surface cooperate to drive the support arm to move inward, thereby realizing convenient disassembly and assembly of the roll core. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of an embodiment of a thermal printer of the utility model.

[0015] Figure 2 It is a structural diagram of the thermal printer embodiment of the utility model after the cover is opened.

[0016] Figure 3 It is a structural diagram of the thermal printer embodiment of the utility model after the cover body is omitted.

[0017] Figure 4 It is a structural diagram of a support module in an embodiment of the thermal printer of the utility model.

[0018] Figure 5 It is an exploded view of the support module in the embodiment of the thermal printer of the utility model.

[0019] Figure 6 It is a cross-sectional view of an embodiment of the thermal printer of the utility model at the paper bin.

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0021] Reference Figures 1 to 6 The thermal printer includes a base 11, a cover 12, a rubber roller 121, a thermal sheet 13 and a supporting assembly. The thermal sheet 13 is arranged on the base 11, the rubber roller 121 is arranged on the cover 12, the thermal sheet 13 and the rubber roller 121 are opposite to each other and form a paper feeding channel, a paper outlet 10 is arranged on the front side of the paper feeding channel, a paper bin 14 is arranged on the base 11, the paper feeding channel is connected with the paper bin 14, and the cover 12 covers the paper bin 14.

[0022] The paper bin 14 is provided with support installation grooves 15 on opposite sides of the paper width direction Y. The support installation grooves 15 extend in the vertical direction. The support installation grooves 15 are provided with loading openings 151 vertically above. The support installation grooves 15 are provided with a through groove 152 on the side of the paper width direction Y facing the paper bin 14.

[0023] The support assembly includes two support modules 2, and a support installation groove 15 is installed with a support module 2. The support module 2 includes a base 21, a support arm 23 and an elastic member 22. The base 21 is provided with a storage groove 210 extending in the vertical direction. The storage groove 210 is provided with a third side wall 215 on the side away from the paper bin 14 in the paper width direction Y. The third side wall 215 is connected between the two first side walls 211. The base 21 is provided with first side walls 211 on both sides of the storage groove 210 based on the paper length direction X. The base 21 is provided with a first bottom wall 214 at the lower part, and the first bottom wall 214 is connected between the two first side walls 211.

[0024] The base 21 is installed into the support installation groove 15 from the loading entrance 151. The support installation groove 15 is provided with positioning protrusions 153 on both sides of the groove 152 based on the paper length direction X. The positioning protrusions 153 on the same side are limitedly matched with the first side wall 211, and the first bottom wall 214 is fixedly connected to the second bottom wall of the support installation groove 15 by screws.

[0025] The first side wall 211 and the third side wall 215 form a storage groove 210. The storage groove 210 is provided with a notch 217 on the side of the paper width direction Y close to the paper bin 14. The upper part of the storage groove 210 is provided with a first hinge part 213. The first hinge part 213 is located at the upper part of the first side wall 211. The first hinge part 213 is arranged in a hinge hole. The two first side walls 211 are respectively provided with guide grooves 212 in the middle, and the guide grooves 212 extend in an arc shape.

[0026] A second hinged portion 238 is provided on the upper portion of the support arm 23, and second side walls 231 are provided on both sides of the support arm 23 in the paper length direction X. The second hinged portion 238 is provided on the upper portion of the second side wall 231, and the second hinged portion 238 is arranged in a hinge column. The first hinged portion 213 is hinged to the second hinged portion 238, and the support arm 23 is located between the two first side walls 211. The two second side walls 231 are both located between the two first side walls 211, and the second side wall 231 is provided with a guide block 233, and the guide block 233 is located in the guide groove 212 and is gap-matched with the guide groove 212.

[0027] The elastic member 22 is located in the storage groove 210 and abuts between the support arm 23 and the base 21. The elastic member 22 is a spring. The spring is arranged along the paper width direction Y and abuts between the support arm 23 and the base 21. Specifically, the support arm 23 is provided with a positioning column 232, and the spring is sleeved outside the positioning column 232. The spring abuts between the support arm 23 and the third side wall 215.

[0028] A support portion 234 is provided at the lower portion of the support arm 23, and the support arm 23 extends into the paper bin 14 along the paper width direction Y. A convex arc surface 235 is provided at the upper portion of the support portion 234, and the central angle of the convex arc surface 235 is less than 180°. A conical guide surface 236 is provided at the lower portion of the support portion 234, and the tip of the conical guide surface 236 faces the paper bin 14, and the central angle of the arc profile of the wide end of the conical guide surface 236 is greater than 180°. The outer end portion of the convex arc surface 235 in the paper width direction Y is connected to the tip by a straight wall 237 extending along the vertical direction, and the support arm 23 can elastically rotate in the slot 152, the slot 217 and the storage slot 210.

[0029] Reference Figure 6 The printing paper roll 3 includes a roll core 31. When the printing paper roll 3 is installed in the paper bin 14, the support arm 23 can be retracted first, and then the printing paper roll 3 can be smoothly dropped and installed. Subsequently, when the support portion 234 is opposite to the hollow portion of the roll core 31, the support portion 234 is ejected and penetrated into the roll core 31 under the action of the elastic member, and then the convex arc surface 235 is used to support the roll core 31. When replacing the printing paper roll 3, the roll core 31 is moved outward by external force, and the roll core 31 cooperates with the inclined surface of the conical guide surface 236, and then the support arm 23 is driven to retract, so that the roll core 31 is smoothly withdrawn, and then the printing paper can be conveniently installed and removed.

[0030] Of course, the above embodiment is only a preferred embodiment of the present invention. In addition to the present embodiment, the support module can be arranged on one side, and another support column can be arranged on the other side. In addition, multiple support modules can be arranged according to actual needs. The above invention concept can also be applied to other types of printers, such as the rubber roller is arranged on the base, and the thermal sheet is arranged on the cover.

[0031] As can be seen from the above, through the cooperation of the rotatable support arm and the elastic member, the support arm can retreat and avoid when loading or removing the printing paper roll, and the support arm will spring outward from the roll core part, and then the paper roll is supported by the support part. In addition, the positioning convex edge limits the first side wall and the fixed connection of the bottom wall can improve the installation stability of the support module, and the clearance cooperation of the guide block and the guide groove can make the rotation of the support arm more stable. Furthermore, the convex arc surface is used to support the roll core, and when disassembling, the roll core and the inclined surface of the conical guide surface are cooperated to drive the support arm to move inward, thereby realizing convenient disassembly and assembly of the roll core.

Claims

1. A thermal printer with an elastically supported paper roll, comprising a base, a cover, a rubber roller, a thermal sheet and a support assembly, wherein one of the rubber roller and the thermal sheet is arranged on the base, and the other of the rubber roller and the thermal sheet is arranged on the cover, the thermal sheet and the rubber roller are opposite to each other and form a paper feeding channel, the base is provided with a paper bin, the paper feeding channel is connected to the paper bin, and the cover is covered on the paper bin; Features: The paper bin is provided with a support installation groove on at least one side in the paper width direction, the support installation groove extends in the vertical direction, a loading port is provided vertically above the support installation groove, and a through groove is provided on one side of the support installation groove facing the paper bin in the paper width direction; The support assembly includes at least one support module, the support module includes a base, a support arm and an elastic member, the base is provided with a storage slot extending in a vertical direction, the storage slot is provided with a notch on a side close to the paper bin in the paper width direction, the upper part of the storage slot is provided with a first hinge part, the upper part of the support arm is provided with a second hinge part, the first hinge part is hinged to the second hinge part, the lower part of the support arm is provided with a support part, the support arm extends into the paper bin along the paper width direction, the elastic member is located in the storage slot and abuts between the support arm and the base; The base is installed into the support installation groove from the loading port, and the support arm can be elastically rotated in the through groove, the notch and the receiving groove.

2. The thermal printer according to claim 1, characterized in that: The base is provided with first side walls on both sides of the storage slot based on the paper length direction, the first hinge portion is located at the upper part of the first side wall, and the support arm is located between the two first side walls; The support and installation slot is provided with positioning protrusions on both sides of the slot based on the paper length direction, and the positioning protrusions on the same side are limitedly matched with the first side wall.

3. The thermal printer according to claim 2, characterized in that: The support arm is provided with second side walls on both sides of the paper length direction, the second hinge portion is provided on the upper part of the second side wall, and the two second side walls are both located between the two first side walls; The first side wall is provided with a guide groove, and the second side wall is provided with a guide block. The guide block is located in the guide groove and is in clearance fit with the guide groove.

4. The thermal printer according to claim 3, characterized in that: The base is provided with a first bottom wall at the lower part, the first bottom wall is connected between the two first side walls, and the first bottom wall is fixedly connected to the second bottom wall of the support installation groove.

5. The thermal printer according to claim 2, characterized in that: The elastic member is a spring, which is arranged along the paper width direction and abuts between the support arm and the base.

6. The thermal printer according to claim 5, characterized in that: The storage slot is provided with a third side wall on a side away from the paper bin in the paper width direction, and the third side wall is connected between the two first side walls; The support arm is provided with a positioning column, the spring is sleeved outside the positioning column, and the spring abuts between the support arm and the third side wall.

7. The thermal printer according to claim 1, characterized in that: The paper bin is provided with the support installation grooves on both sides of the paper width direction, and one support installation groove is equipped with one support module.

8. The thermal printer according to any one of claims 1 to 7, characterized in that: The support portion is provided with an outer convex arc surface at the upper portion, and the central angle of the outer convex arc surface is less than 180°; The support portion is provided with a conical guide surface at the lower portion, the tip of the conical guide surface faces the paper bin, and the central angle of the arc profile of the wide end of the conical guide surface is greater than 180°.

9. The thermal printer according to claim 8, characterized in that: The outer end portion of the outer convex arc surface in the paper width direction is connected to the tip through a straight wall extending in the vertical direction.

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