Thermal printer with two-section type buffer uncovering function

Abstract

The utility model provides a two-section type buffering uncovering thermal printer, which comprises a base, a cover body, a rubber roller, a thermal sensitive sheet, a torsion spring, a locking sheet and a support frame, the cover body is provided with a rotating shaft, the locking sheet is fixedly arranged on the cover body, the locking sheet is provided with an extension part, the outer end part of the extension part is provided with a clamping part, the locking sheet is fixedly arranged on the base, and the support frame is fixedly arranged on the base. The locking plate is provided with a first clamping groove and a second clamping groove, the first clamping groove and the second clamping groove are distributed around the hinge hole in an arc shape, the second clamping groove is located above the first clamping groove, the rotating shaft is hinged to the hinge hole, and when the cover body is in a closed state, the clamping part is located in the first clamping groove and separated from the first limiting wall; when the cover body is in a first open state, the clamping part is positioned in the first clamping groove and is adjacent to the first limiting wall; and when the cover body is in the second opening state, the clamping part moves into the second clamping groove from the first clamping groove, and the clamping part is adjacent to the second limiting wall. In the opening process of the cover body, the two-section type buffering design is utilized, the opening impact of the cover body is reduced, and the use experience degree of a user is improved.

Description

Technical Field

[0001] The utility model relates to a thermal printer, in particular to a thermal printer with a two-stage buffer cover opening. 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, it is necessary to open the printer cover to replace the printing paper. Most of the existing cover opening structures use a torsion spring as an elastic member. After the cover is opened, the elastic force of the torsion spring is used to open the cover upward. The cover is opened upward too quickly and then impacts the base, thereby affecting the user experience. For this reason, a simple structure needs to be designed to achieve buffered cover opening. Utility Model Content

[0003] The utility model aims to provide a thermal printer with a two-stage buffer cover opening.

[0004] In order to achieve the purpose of the utility model, the utility model provides a two-stage buffer cover opening thermal printer, including a base, a cover body, a rubber roller, a thermal sheet and a torsion spring, the base is provided with a paper bin, the cover body is hinged to the base and covers the top of the paper bin, one of the thermal sheet and the rubber roller is arranged on the base, and the other of the thermal sheet and the rubber roller is arranged on the cover body, the thermal printer also includes a locking piece and a support frame, the cover body is provided with a rotating shaft along the paper width direction, the locking piece is fixedly arranged on the cover body, the locking piece is provided with an extension part, the extension part extends in an arc shape around the rotating shaft, and the outer end of the extension part is provided with a clamping part; the locking piece is fixedly arranged on the base, the locking piece is provided with a reaming hole at the upper end, the locking piece is provided with a first clamping slot and a second clamping slot, the first clamping slot The slot and the second slot are distributed in an arc around the reaming hole, and the second slot is located above the first slot; the rotating shaft is hinged to the reaming hole, the torsion spring is sleeved outside the rotating shaft, the first end of the torsion spring abuts against the base, the second end of the torsion spring abuts against the cover body, the extension part and the clamping part rotate along the rotation direction with the rotating shaft as the center, the first slot is provided with a first limiting wall above the rotation direction, and the second slot is provided with a second limiting wall above the rotation direction; when the cover body is in the closed state, the clamping part is located in the first slot and separated from the first limiting wall; when the cover body is in the first open state, the clamping part is located in the first slot and adjacent to the first limiting wall; when the cover body is in the second open state, the clamping part moves from the first slot to the second slot, and the clamping part is adjacent to the second limiting wall.

[0005] A further solution is that the clamping portion is arranged in an arc-shaped protrusion, and matching arc surfaces are respectively provided above and below the clamping portion in the rotation direction.

[0006] A further solution is that the base is provided with a placement groove on the upper end surface, the placement groove is penetrated by a through groove in the vertical direction, the support frame passes through the through groove, the lower end of the support frame is fixedly connected to the base, and the extension part can move in the placement groove.

[0007] A further solution is that the base includes an inner shell and an outer shell, the paper bin and the placement slot are both arranged on the inner shell, an opening is arranged below the rotation direction of the first card slot, the inner shell is provided with a slot connected to the opening, the card part moves from the opening to the slot, the outer shell is sleeved on the outside of the inner shell and covers the outside of the slot.

[0008] A further solution is that the cover body is provided with an installation groove, and a through groove is provided through the installation groove toward the rotating shaft; the locking plate includes a fixed part and a connecting part, the fixed part extends along the paper width direction, the fixed part is fixedly installed in the installation groove, the connecting part is perpendicular to the fixed part, and the connecting part passes through the through groove and is connected with the extension part.

[0009] A further solution is that the cover body includes an inner cover and an outer cover, the mounting groove and the rotating shaft are both arranged on the inner cover, the outer cover is sleeved outside the inner cover, and the edge of the outer cover is located outside the rotating shaft based on the paper width direction.

[0010] A further solution is that a avoidance groove is provided on the lower end surface of the inner cover, and the upper end of the support frame is located in the avoidance groove.

[0011] The beneficial effect of the utility model is that the support frame provides hinge support for the cover body so that it can rotate stably, and further, by setting an arc-shaped extension part and a clamping part, and cooperating with two clamping grooves on the support frame, the clamping part is located in the first clamping groove and adjacent to the first limiting wall when the cover body is in the first open state, and the clamping part moves from the first clamping groove to the second clamping groove, and the clamping part is adjacent to the second limiting wall when the cover body is in the second open state, so as to realize the use of a two-stage buffer design during the opening process of the cover body, reduce the opening impact of the cover body, and improve the user experience. Furthermore, the arc-shaped protrusion is convenient for the clamping part to move between the two clamping grooves, and the placement groove is convenient for the installation and fixation of the support frame, and the locking piece operates more stably in the placement groove, and the arrangement of the opening and the slot is coordinated to expand the total stroke of the two clamping grooves, and the average two-stage buffer distance, so as to further improve the stability of the cover body opening, and the arrangement of the connecting part and the fixing part improves the stability of the extension part and the clamping part, and the cover of the shell and the outer cover is coordinated to keep the appearance of the whole machine flat. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of an embodiment of a thermal printer of the utility model.

[0013] Figure 2 It is a structural diagram of the thermal printer embodiment of the utility model when the cover is opened.

[0014] Figure 3 It is a structural diagram of an embodiment of the thermal printer of the utility model with the housing omitted.

[0015] Figure 4It is an exploded view of an embodiment of the thermal printer of the utility model.

[0016] Figure 5 It is an exploded view of the thermal printer embodiment of the utility model in a closed state.

[0017] Figure 6 It is an exploded view of the thermal printer embodiment of the utility model in a first open state.

[0018] Figure 7 It is an exploded view of the thermal printer embodiment of the utility model in the second open state.

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0020] Reference Figures 1 to 7 The thermal printer includes a base 11, a cover 12, a rubber roller 121, a thermal sheet 114, a torsion spring, a locking piece 3 and a support frame 2. The base 11 is provided with a paper bin 111. The cover 12 is hinged to the base 11 and covers the paper bin 111. The thermal sheet 114 is arranged on the base 11. The rubber roller 121 is arranged on the cover 12. The cover 12 is provided with a rotating shaft 124 along the paper width direction Y. The locking piece 3 is fixedly arranged on the cover 12. A paper outlet 10 is arranged between the base 11 and the cover 12. The thermal sheet 114 and the rubber roller 121 are opposite to each other and form a paper feeding channel. The paper feeding channel is connected with the paper outlet 10.

[0021] Specifically, the cover body 12 includes an inner cover 122 and an outer cover 123. The cover body 12 is provided with a mounting groove 125. The mounting groove 125 and the rotating shaft 124 are both arranged on the inner cover 122. The mounting groove 125 and the rotating shaft 124 are both close to the edge of the paper bin 111. A cutting device 13 is provided on the side 121 of the inner cover 122 close to the rubber roller. The mounting groove 125 is provided with a slot 126 extending through the rotating shaft 124. The locking piece 3 includes a fixing portion 31 and a connecting portion 32. The fixing portion 31 extends along the paper width direction Y. The fixing portion 31 is fixedly installed in the mounting groove 125. The connecting portion 32 is perpendicular to the fixing portion 31. The connecting portion 32 passes through the slot 126 and is connected to the extending portion 33. The outer cover 123 is sleeved outside the inner cover 122. The edge of the outer cover 123 is located on the outer side of the rotating shaft 124 based on the paper width direction Y.

[0022] The locking piece 3 is provided with an extension portion 33, which extends in an arc shape around the rotating shaft 124. A clamping portion 34 is provided at the outer end of the extension portion 33. The extension portion 33 is connected between the connecting portion 32 and the clamping portion 34. The clamping portion 34 is arranged in an arc-shaped protrusion, and the clamping portion 34 is provided with matching arc surfaces above and below the rotation direction R respectively.

[0023] The base 11 is provided with a placement groove 115 on the upper end surface. The base 11 includes an inner shell 113 and an outer shell 112. The paper bin 111 and the placement groove 115 are both provided on the inner shell 113. The placement groove 115 is provided with a through groove in the vertical direction. The support frame 2 passes through the through groove. The lower end 22 of the support frame 2 is fixedly connected to the inner shell 113 of the base 11. The locking plate 3 is provided with a reaming hole 21 at the upper end. The locking plate 3 is provided with a first card slot 23 and a second card slot 22. The first card slot 23 and the second card slot 22 are provided. The slots 22 are distributed in an arc shape around the reaming hole 21. The second slot 22 is located above the first slot 23. The first slot 23 is provided with a first limiting wall 232 above the rotation direction R. The second slot 22 is provided with a second limiting wall 221 above the rotation direction R. An opening 231 is provided below the first slot 23 in the rotation direction R. The inner shell 113 is provided with a slot 116 connected to the opening 231. The outer shell 112 is sleeved on the outside of the inner shell 113 and covers the outside of the slot 116.

[0024] The rotating shaft 124 is hinged to the reaming hole 21, and a torsion spring (not shown) is sleeved outside the rotating shaft 124. The first end of the torsion spring abuts against the base 11, and the second end of the torsion spring abuts against the cover body 12. The locking plate 3, the extension portion 33 and the clamping portion 34 rotate along the rotation direction R with the rotating shaft 124 as the center, and the extension portion 33 can move in the placement groove 115.

[0025] Reference Figure 5 When the cover body 12 is in the closed state, the clamping portion 34 moves from the opening 231 to the groove 116, and the clamping portion 34 is located in the first clamping groove 23 and separated from the first limiting wall 232. The lower end surface of the inner cover 122 is provided with an avoidance groove 127, and the upper end of the support frame 2 is located in the avoidance groove 127.

[0026] Reference Figure 6 When the cover body 12 is in the first open state, that is, in the semi-open state, with the action of the torsion spring, the cover body 12 opens upward around the rotation direction R, and the clamping portion 34 is located in the first clamping groove 23 and adjacent to the first limiting wall 232, thereby limiting the position of the cover body 12 for the first time.

[0027] Reference Figure 7 The cover body 12 is in the second open state, that is, in the fully open state. As the cover body 12 is driven upward by external force, the clamping portion 34 moves from the first clamping slot 23 to the second clamping slot 22. As the clamping portion 34 is adjacent to the second limiting wall 221, the position of the cover body 12 is limited for the second time.

[0028] Of course, the invention of this case can also be adapted to other types of thermal printers, such as when the rubber roller is arranged on the base and the thermal sheet is arranged on the cover, the purpose of the present invention can also be achieved.

[0029] As can be seen from the above, the support frame provides hinge support for the cover body so that it can rotate stably. Furthermore, by setting an arc-shaped extension and a card portion, and cooperating with the two card slots on the support frame, the card portion is located in the first card slot and adjacent to the first limiting wall when the cover body is in the first open state. When the cover body is in the second open state, the card portion moves from the first card slot to the second card slot, and the card portion is adjacent to the second limiting wall, thereby realizing the use of a two-stage buffer design during the opening of the cover body, reducing the opening impact of the cover body, and improving the user experience. Furthermore, the arc-shaped protrusion facilitates the movement of the card portion between the two card slots, and the placement slot facilitates the installation and fixation of the support frame, and the locking piece operates more stably in the placement slot, and the arrangement of the opening and the slot is combined to expand the total stroke of the two card slots, and the average two-stage buffer distance, so as to further improve the stability of the cover body opening, and the arrangement of the connecting portion and the fixing portion improves the stability of the extension portion and the card portion, and the cover of the shell and the outer cover is combined to keep the appearance of the whole machine flat.

Claims

1. A two-stage buffered cover opening thermal printer, comprising a base, a cover, a rubber roller, a thermal sheet and a torsion spring, wherein the base is provided with a paper bin, the cover is hinged to the base and covers the top of the paper bin, one of the thermal sheet and the rubber roller is provided on the base, and the other of the thermal sheet and the rubber roller is provided on the cover; Features: The thermal printer further comprises a locking piece and a support frame, the cover body is provided with a rotating shaft along the paper width direction, the locking piece is fixedly provided on the cover body, the locking piece is provided with an extension part, the extension part extends in an arc shape around the rotating shaft, and the outer end of the extension part is provided with a clamping part; The locking plate is fixedly arranged on the base, and a reaming hole is arranged at the upper end of the locking plate. The locking plate is provided with a first card slot and a second card slot, and the first card slot and the second card slot are distributed in an arc shape around the reaming hole, and the second card slot is located above the first card slot; The rotating shaft is hinged with the reaming hole, the torsion spring is sleeved outside the rotating shaft, the first end of the torsion spring is in contact with the base, the second end of the torsion spring is in contact with the cover, the extension part and the clamping part rotate along the rotation direction with the rotating shaft as the center, the first clamping slot is provided with a first limiting wall above the rotation direction, and the second clamping slot is provided with a second limiting wall above the rotation direction; When the cover body is in a closed state, the clamping portion is located in the first clamping slot and is separated from the first limiting wall; When the cover is in a first open state, the clamping portion is located in the first clamping slot and is adjacent to the first limiting wall; When the cover is in the second open state, the latch portion moves from the first latch slot to the second latch slot, and the latch portion is adjacent to the second limiting wall.

2. The thermal printer according to claim 1, characterized in that: The clamping portion is arranged in an arc-shaped protrusion, and matching arc surfaces are respectively provided above and below the clamping portion in the rotation direction.

3. The thermal printer according to claim 1, characterized in that: The base is provided with a placement groove on the upper end surface, the placement groove is penetrated by a through groove in the vertical direction, the support frame passes through the through groove, the lower end of the support frame is fixedly connected to the base, and the extension part can move in the placement groove.

4. The thermal printer according to claim 3, characterized in that: The base includes an inner shell and an outer shell, the paper bin and the placement slot are both arranged on the inner shell, an opening is arranged below the rotation direction of the first card slot, the inner shell is provided with a slot connected to the opening, the card portion moves from the opening to the slot, and the outer shell is sleeved outside the inner shell and covers the outside of the slot.

5. The thermal printer according to any one of claims 1 to 4, characterized in that: The cover body is provided with a mounting groove, and the mounting groove is provided with a through groove extending toward the rotating shaft; The locking piece includes a fixing portion and a connecting portion, wherein the fixing portion extends along the paper width direction, the fixing portion is fixedly installed in the installation slot, the connecting portion is perpendicular to the fixing portion, and the connecting portion passes through the slot and is connected to the extending portion.

6. The thermal printer according to claim 5, characterized in that: The cover body comprises an inner cover and an outer cover, the mounting groove and the rotating shaft are both arranged on the inner cover, the outer cover is sleeved outside the inner cover, and the edge of the outer cover is located outside the rotating shaft based on the paper width direction.

7. The thermal printer according to claim 6, characterized in that: The lower end surface of the inner cover is provided with an escape groove, and the upper end of the support frame is located in the escape groove.

Images