Thermal printer capable of opening cover in labor-saving manner

Abstract

The utility model provides a laborsaving uncovering thermal printer, which comprises a base, a cover body, a rubber roller, a thermosensitive sheet, a thermosensitive support, a hold-down spring, two lock fasteners and two fastening elastic members, the cover body is provided with hinged supports on two sides of the thermosensitive sheet support based on the paper width direction, the hinged supports are provided with reamed holes along the paper width direction in a penetrating manner, and the reamed holes are provided with elastic fasteners. A through hole penetrating in the vertical direction is formed in the outer side of the reaming hole of the cover body, and a locking groove is formed in the position, below the through hole, of the base; the lock catch pieces are provided with hinge columns in the paper width direction and lock columns in the vertical direction, the outward end faces of the lock catch pieces are provided with operation parts, the hinge column of one lock catch piece is hinged to the hinge hole of the hinge support on one side, the lock catch pieces rotate around the hinge columns, and the lock columns penetrate through the through holes to be detachably clamped with the lock grooves. The buckling elastic piece is connected between the locking piece and the cover body support, and the buckling elastic piece applies buckling force to the locking piece. The hinge column is arranged on the lock catch piece, so that the structure is simpler, the cost is lower, and the cover opening is more labor-saving.

Description

Technical Field

[0001] The utility model relates to the field of thermal printing equipment, in particular to a thermal printer with labor-saving cover opening. Background Art

[0002] With the popularization of thermal printers, they are not only used in bank ATMs, supermarket cash registers and e-commerce delivery offices, but also in the rapidly growing e-commerce and express delivery industries, which have higher requirements for the stability, durability, and printing accuracy and speed of the printers.

[0003] The closing of the printer cover and its stable assembly with the base directly affect the stability of the printer. The existing cover is locked by rotating buckles, and a rotating shaft is connected between the rotating buckles. Since the transmission connection is achieved through the rotating shaft, a corresponding structural space needs to be designed for the rotating shaft, which is not conducive to further space saving layout and further cost saving. Utility Model Content

[0004] The utility model aims to provide a thermal printer with a simple structure and labor-saving cover opening.

[0005] In order to achieve the purpose of the utility model, the utility model provides a thermal printer with labor-saving cover opening, including a base, a cover body, a rubber roller and a thermal sheet, the cover body is located above the base, the first hinged portion of the cover body is hinged to the second hinged portion of the base, the rubber roller is arranged on the base, the thermal sheet is arranged on the cover body, a paper outlet is formed between the base and the cover body, the thermal sheet and the rubber roller are close to the paper outlet and opposite to each other to form a paper feeding channel, the paper feeding channel is connected to the paper outlet, and the paper outlet and the first hinged portion are located on opposite sides of the paper feeding channel; the thermal printer includes a thermal bracket, a holding spring, two locking parts and two buckling elastic parts; the cover body is provided with a thermal mounting groove, the cover body is provided with a supporting wall above the thermal mounting groove, the thermal sheet is installed on the bottom surface of the thermal bracket, the thermal bracket is arranged on the thermal mounting groove, the holding spring is located at the thermal bracket Above the frame, a holding spring elastically abuts between the supporting wall and the thermal bracket, and the holding spring applies a holding force toward the rubber roller to the thermal sheet, and the thermal sheet elastically abuts against the rubber roller; the cover body is respectively provided with hinged brackets on both sides of the thermal sheet bracket based on the paper width direction, and the hinged bracket is penetrated with a hinge hole along the paper width direction, and the cover body is provided with a through hole penetrating in the vertical direction on the outside of the hinge hole, and the base is provided with a locking groove below the through hole; the locking member is provided with a hinge column along the paper width direction, and the locking member is provided with a lock column along the vertical direction, and the locking member is provided with an operating part on the outward end surface, the hinge column of one locking member is hinged to the hinge hole of the hinge bracket on one side, and the locking member rotates around the hinge column, and the lock column passes through the through hole and is detachably engaged with the lock groove, and the buckling elastic member is connected between the locking member and the cover body bracket, and the buckling elastic member applies a buckling force to the locking member.

[0006] A further solution is that the buckling elastic member adopts a spring, the buckling elastic member is arranged along the radial direction of the hinge column, and the buckling elastic member elastically abuts between the locking member and the cover body.

[0007] A further solution is that the locking member is provided with a positioning groove along the radial direction of the hinge column, and the first end of the locking elastic member is located in the positioning groove.

[0008] A further solution is that a positioning column is provided in the positioning groove, and the positioning column is located in the first end of the buckling elastic member.

[0009] A further solution is that the cover body includes an inner cover shell and an outer cover shell, the thermal installation groove, the support wall, the hinged bracket and the through hole are arranged on the inner cover shell, the inner cover shell is provided with a placement groove on the outer side of the hinged bracket based on the paper width direction, and the locking piece is rotatably arranged in the placement groove; the outer cover shell is connected to the opening at the position corresponding to the placement groove, the outer cover shell covers the inner cover shell and the locking piece, and the operating part is located at the opening.

[0010] A further solution is that a clamping ring is provided at the outer end of the hinge column passing through the hinge hole, and the clamping ring is limitedly matched with the hinge bracket.

[0011] A further solution is that the thermal printer includes a main control circuit board, which is arranged in the cover body and close to the first hinge part, and the thermal sheet is connected to the main control circuit board through a control cable, and the control cable is located in the cover body.

[0012] A further solution is that a paper inlet is formed between the base and the cover, the paper inlet is close to the first hinged portion, and the paper feeding channel is connected between the paper outlet and the paper inlet.

[0013] The beneficial effect of the utility model is that the holding force applied to the thermal sheet toward the rubber roller is applied by the holding spring, so that the thermal sheet and the rubber roller are elastically contacted, and the hinge brackets located on both sides are used to install the locking member, and the locking member can be stably rotated in the placement groove through the cooperation of the hinge column and the hinge hole, so that the locking column can be stably rotated, and the elastic contact between the thermal sheet and the rubber roller is achieved to realize the separable engagement between the locking member and the locking groove. Since an integrated rotating shaft arrangement is not adopted, but a hinge column is arranged separately on the locking member, not only the structure is simpler and the cost is lower, but also the cover is more labor-saving. Furthermore, by the cooperation of the buckling elastic member with the positioning groove and the positioning column, the locking effect of the locking member is better. And by setting the clamping ring to limit the position of the locking member, the position of the locking member is made more stable. In addition, a main control circuit board is configured on the cover body, and the thermal sheet is also installed on the cover body. The main control circuit board is close to the thermal sheet, thereby reducing the control wiring distance between the thermal sheet and the main control circuit board. The reduction in line length means reducing voltage drop, improving the transmission stability of printing data, and then improving imaging stability. 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 an embodiment of the thermal printer of the utility model when the cover is opened.

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

[0017] Figure 4 It is an exploded view of the thermal printer embodiment of the utility model after the outer cover shell is omitted.

[0018] Figure 5 It is a structural diagram of a locking member in an embodiment of a thermal printer of the utility model.

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

[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 1, a cover 2, a rubber roller 12 and a thermal sheet 221. The cover 2 is located above the base 1. The cover 2 includes an inner cover shell 211 and an outer cover shell 212. A hinge arm 24 is provided on the bottom surface of the inner cover shell 211. A first hinge portion is provided on the hinge arm 24. The first hinge portion of the hinge arm 24 extends into the base 1 and is hinged to the second hinge portion of the base 1. The hinged manner can be achieved by combining a hinge column with a hinge hole.

[0022] The rubber roller 12 is arranged on the base 1, and the thermal sheet 221 is arranged on the cover body 2. A paper outlet 11 is formed between the base 1 and the cover body 2 on the first side, and a paper inlet 16 is formed between the base 1 and the cover body 2 on the second side. The thermal sheet 221 and the rubber roller 12 are opposite to each other near the paper outlet 11 and form a paper feeding channel. The paper inlet 16 is near the first hinge part. The paper feeding channel is connected between the paper outlet 11 and the paper inlet 16. The paper outlet 11 and the paper inlet 16 are located on opposite sides of the paper feeding channel. Two paper clamping blocks 15 are arranged at the paper inlet 16.

[0023] The thermal printer includes a thermal bracket 222, a holding spring, two locking members 3 and two buckling elastic members 36. The cover body 2 is provided with a thermal mounting groove 213. The cover body 2 is provided with a supporting wall 214 above the thermal mounting groove 213. The thermal mounting groove 213 is provided with slide grooves 2131 extending in the vertical direction on both sides of the paper width direction Y. The thermal sheet 221 is installed on the bottom surface of the thermal bracket 222. The thermal bracket 222 is provided with sliders 2221 on both sides of the paper width direction Y. The thermal bracket 222 is arranged on the thermal mounting groove 213. The slider 2221 is located in the slide groove 2131. The holding spring (not shown) is located above the thermal bracket 222. The holding spring elastically abuts between the supporting wall 214 and the thermal bracket 222. The holding spring applies a holding force toward the rubber roller 12 to the thermal sheet 221. The thermal sheet 221 elastically abuts against the rubber roller 12.

[0024] The cover body 2 is provided with hinged brackets 215 on both sides of the thermal sheet 221 bracket based on the paper width direction Y, and the hinged bracket 215 is penetrated with a reaming hole 216 along the paper width direction Y. The cover body 2 is provided with a through hole 218 penetrating in the vertical direction on the outer side of the reaming hole 216, and the base 1 is provided with a locking groove 13 below the through hole 218. The thermal installation groove 213, the support wall 214, the hinged bracket 215 and the through hole are arranged on the inner cover shell 211. The inner cover shell 211 is provided with a placement groove 217 on the outer side of the hinged bracket 215 based on the paper width direction Y, and the placement groove 217 is connected between the reaming hole 216 and the through hole 218. The outer cover shell 212 is provided with an opening 2121 at a position corresponding to the placement groove 217, and the outer cover shell 212 covers the outside of the inner cover shell 211.

[0025] The locking member 3 is provided with a hinge column 31 along the paper width direction Y, and a lock column 32 is provided along the vertical direction. A locking part is provided at the end of the lock column 32. The locking member 3 is provided with an operating part 35 on the outward end surface. The operating part 35 is arranged in a buckle groove or a buckle strip. The locking member 3 is provided with a positioning groove 33 along the radial arrangement of the hinge column 31. A positioning column 34 is provided in the positioning groove 33. One locking member 3 is rotatably arranged in a placement groove 217 on one side. The hinge column 31 of one locking member 3 is hinged to the hinge hole 216 of the hinge bracket 215 on one side. A snap ring (not shown) is provided at the outer end 311 of the hinge column 31 passing through the hinge hole 216, and the snap ring is limitedly matched with the hinge bracket 215. The lock member 3 rotates around the hinge column 31, and the lock column 32 passes through the through hole 218 and is detachably engaged with the lock groove 13. The locking elastic member 36 adopts a spring, and the locking elastic member 36 is arranged along the radial direction of the hinge column 31. The locking elastic member 36 elastically abuts between the lock member 3 and the cover body 2. The first end of the locking elastic member 36 is located in the positioning groove 33, and the positioning column 34 is located in the first end of the locking elastic member 36. The second end of the locking elastic member 36 is adjacent to the peripheral wall of the placement groove 217. The locking elastic member 36 is arranged close to the paper outlet 11, and the locking elastic member 36 is connected between the lock member 3 and the cover body 2 bracket. The locking elastic member 36 applies a locking force to the lock member 3.

[0026] The outer cover shell 212 is connected to the position corresponding to the placement groove 217 and is provided with an opening 2121 . The outer cover shell 212 covers the inner cover shell 211 and the lock member 3 . The operating part 35 is located at the opening 2121 , so that the user can pull the operating part 35 and subsequently rotate the lock column 32 .

[0027] The thermal printer includes a main control circuit board 23, which is arranged in the cover body 2 and close to the first hinge part, that is, away from the side of the thermal sheet 221. The thermal sheet 221 is connected to the main control circuit board 23 through a control cable, and the control cable is located in the cover body 2.

[0028] In the closed state, the lock column 32 passes through the through hole 218 and engages with the lock slot 13. When the cover body needs to be opened, the operating parts 35 on both sides are pulled to separate the lock column 32 from the lock slot 13, and then the elastic restoring force of the holding spring on the thermal film 221 is used to slightly lift the cover body 2. Then, the cover body 2 can be flipped over by external force to achieve the replacement of printing paper.

[0029] As can be seen from the above, the holding spring applies a holding force toward the rubber roller to the thermal sheet, so that the thermal sheet and the rubber roller are elastically abutted, and the hinge brackets located on both sides are used to install the locking member. The hinge column cooperates with the hinge hole to make the locking member stably rotate in the placement groove, so that the locking column can rotate stably, and the elastic abutment between the thermal sheet and the rubber roller is achieved to realize the separable engagement between the locking member and the locking groove. Since an integrated rotating shaft arrangement is not adopted, but a hinge column is arranged separately on the locking member, not only the structure is simpler and the cost is lower, but also the cover is more labor-saving. Furthermore, by the cooperation of the buckling elastic member with the positioning groove and the positioning column, the locking effect of the locking member is better. And by setting the clamping ring to limit the position of the locking member, the position of the locking member is made more stable. In addition, a main control circuit board is configured on the cover body, and the thermal sheet is also installed on the cover body. The main control circuit board is close to the thermal sheet, thereby reducing the control wiring distance between the thermal sheet and the main control circuit board. The reduction in line length means reducing voltage drop, improving the transmission stability of printing data, and then improving imaging stability.

Claims

1. A thermal printer with labor-saving cover opening, comprising a base, a cover body, a rubber roller and a thermal sheet, wherein the cover body is located above the base, a first hinged portion of the cover body is hinged to a second hinged portion of the base, the rubber roller is arranged on the base, the thermal sheet is arranged on the cover body, a paper outlet is formed between the base and the cover body, the thermal sheet and the rubber roller are close to the paper outlet and face each other to form a paper feeding channel, the paper feeding channel is connected to the paper outlet, and the paper outlet and the first hinged portion are located on opposite sides of the paper feeding channel; Features: The thermal printer comprises a thermal bracket, a holding spring, two locking parts and two buckling elastic parts; The cover body is provided with a thermosensitive mounting groove, the cover body is provided with a supporting wall above the thermosensitive mounting groove, the thermosensitive sheet is installed on the bottom surface of the thermosensitive bracket, the thermosensitive bracket is arranged on the thermosensitive mounting groove, the holding spring is located above the thermosensitive bracket, the holding spring elastically abuts between the supporting wall and the thermosensitive bracket, the holding spring applies a holding force toward the rubber roller to the thermosensitive sheet, and the thermosensitive sheet elastically abuts against the rubber roller; The cover body is provided with hinged brackets on both sides of the thermal sheet bracket based on the paper width direction, the hinged bracket is provided with a reaming hole penetrating along the paper width direction, the cover body is provided with a through hole penetrating along the vertical direction on the outer side of the reaming hole, and the base is provided with a locking groove below the through hole; The locking member is provided with a hinge column along the paper width direction, and a lock column is provided with the locking member along the vertical direction. The locking member is provided with an operating portion on the outward end surface. The hinge column of one locking member is hinged to the hinge hole of the hinge bracket on one side. The locking member rotates around the hinge column, and the lock column passes through the through hole and is detachably engaged with the lock groove. The locking elastic member is connected between the locking member and the cover body bracket, and the locking elastic member applies a locking force to the locking member.

2. The thermal printer according to claim 1, characterized in that: The buckling elastic member is a spring, and the buckling elastic member is arranged along the radial direction of the hinge column. The buckling elastic member elastically abuts between the locking member and the cover body.

3. The thermal printer according to claim 2, characterized in that: The locking member is provided with a positioning groove along the radial direction of the hinge column, and the first end of the buckling elastic member is located in the positioning groove.

4. The thermal printer according to claim 3, characterized in that: A positioning column is arranged in the positioning groove, and the positioning column is located in the first end of the buckling elastic member.

5. The thermal printer according to claim 4, characterized in that: The cover body comprises an inner cover shell and an outer cover shell, the thermal installation groove, the support wall, the hinge bracket and the through hole are arranged on the inner cover shell, the inner cover shell is provided with a placement groove on the outer side of the hinge bracket based on the paper width direction, and the locking member is rotatably arranged in the placement groove; The outer cover shell is connected to and provided with an opening at a position corresponding to the placement groove, the outer cover shell covers the inner cover shell and the locking member, and the operating part is located at the opening.

6. The thermal printer according to claim 1, characterized in that: The outer end of the hinge post passing through the reaming hole is provided with a clamping ring, and the clamping ring is limitedly matched with the hinge bracket.

7. The thermal printer according to any one of claims 1 to 6, characterized in that: The thermal printer comprises a main control circuit board, which is arranged in the cover body and close to the first hinge part. The thermal sheet is connected to the main control circuit board via a control cable, which is located in the cover body.

8. The thermal printer according to claim 7, characterized in that: A paper inlet is formed between the base and the cover, the paper inlet is close to the first hinge part, and the paper feeding channel is connected between the paper outlet and the paper inlet.

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