Thermal printer with power switch integrally arranged

Abstract

The utility model provides a power switch integrated thermal printer, which comprises a base, a cover body, a rubber roller, a thermosensitive sheet and a main control circuit board, the base comprises an inner seat and a shell, a power switch is welded on the main control circuit board, the main control circuit board is fixed at the bottom of the inner seat, the power switch comprises a shell, a button and a pin, and the shell is fixed on the shell. The shell is provided with a limiting protruding edge on the periphery of the button, the bottom of the inner base is provided with a first positioning step, the limiting protruding edge is matched with the first positioning step in a limiting mode, the shell is provided with a bottom wall and a peripheral wall, the peripheral wall is provided with an open hole in a penetrating mode, the peripheral wall is provided with a second positioning step, the inner base and the main control circuit board are installed in the shell, and the button is located at the open hole. And the lower part of the limiting convex edge is in limiting fit with the second positioning step. The power switch is directly welded on the main control circuit board, the shell can be used for being adjacent to the main control circuit board, and the two positioning steps are matched to fix the power switch, so that the power switch is fixed, and the stability of the power switch is improved.

Description

Technical Field

[0001] The utility model relates to the field of thermal printing, in particular to a thermal printer with an integrated power switch. Background Art

[0002] With the popularization of thermal printers, they have been widely used in the warehousing and logistics industry. Thermal printers include thermal transfer printers that use the carbon ribbon thermal transfer principle, and thermal printers that use thermal paper for thermal imaging. After thermal printing, the printed paper is output outward for users to use.

[0003] Thermal printers are generally equipped with a power switch, which is set on the outer wall of the base for user operation. The power switch is generally connected to the main control circuit board through a wire, which is not only not conducive to reducing costs, but the wiring layout of the wires will also affect assembly efficiency. Utility Model Content

[0004] The utility model aims to provide a thermal printer with an integrated power switch.

[0005] In order to achieve the purpose of the utility model, the utility model provides a thermal printer with an integrated power switch, including a base, a cover, a rubber roller, a thermal sheet and a main control circuit board. The base is provided with a paper bin, the cover is hinged to the base and covers the paper bin, a paper outlet is formed between the cover and the base, 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, the thermal sheet and the rubber roller are opposite to each other and form a paper feed channel, and the paper feed channel is connected between the paper outlet and the paper bin; the base includes an inner base and an outer shell, a power switch is welded on the main control circuit board, the main circuit board is arranged in a horizontal direction and fixed to the bottom of the inner base; the power switch includes a shell, a button and a pin, the shell is arranged in a horizontal direction The extended arrangement is that the pin is located on the inner side of the shell based on the horizontal direction, the button is located on the outer side of the shell based on the horizontal direction, the pin is welded to the main control circuit board, the shell is provided with a limiting ridge on the outer periphery of the button, and the bottom of the inner seat is provided with a first positioning step, the upper part of the limiting ridge is located on the outer side of the first positioning step and is limited by the first positioning step; the outer shell is provided with a bottom wall and a peripheral wall located on the outer periphery of the bottom wall, the bottom wall and the peripheral wall form an accommodating cavity, the peripheral wall is provided with an opening, and the peripheral wall is provided with a second positioning step at the bottom of the opening, the inner seat and the main control circuit board are installed in the accommodating cavity, the button is located at the opening, and the lower part of the limiting ridge is located on the outer side of the second positioning step and is limited by the second positioning step.

[0006] A further solution is that the peripheral wall includes side walls, front end walls and rear end walls located on both sides of the paper width direction, the front end wall and rear end wall are located on both sides of the length direction, the opening is located on the side wall, and the second positioning step is located on the inner side of the side wall.

[0007] A further solution is that the side wall is provided with a placement groove on the inner side of the opening, side retaining walls are provided on both sides of the placement groove in the length direction, a bottom retaining wall is provided at the bottom of the placement groove in the vertical direction, the placement groove has an upper opening above the vertical direction, a second positioning step is provided on the bottom retaining wall, and the shell is installed into the placement groove from the upper opening.

[0008] A further solution is that a guide plate is connected to the side wall vertically above the side retaining wall.

[0009] A further solution is that the housing is adjacent to the upper surface of the main control circuit board.

[0010] A further solution is to bend the pin into an L-shape.

[0011] A further solution is that a transverse plate and a longitudinal plate are provided at the bottom of the inner seat, the transverse plate and the longitudinal plate form a first positioning step, and an end of the transverse plate is adjacent to the inner surface of the peripheral wall.

[0012] A further solution is that the cover body is provided with two slide grooves near the paper outlet, the slide grooves extend along the length direction, the two slide grooves are respectively located on both sides of the paper width direction, the slide groove is connected to an entrance vertically below, and the slide groove is connected to an operation port on the outside in the paper width direction; the base is provided with two lock hooks near the paper outlet, and the two lock hooks are respectively located on both sides of the paper width direction; the thermal printer includes two cover opening members and two elastic members, one cover opening member and an elastic member are arranged in the slide groove, the cover opening member moves in the length direction in the slide groove, the cover opening member is provided with a lock groove connected to the entrance, a lock part is provided in the lock groove, the lock hook enters the lock groove from the entrance, the lock part and the lock hook are detachably engaged, the elastic member is connected between the cover opening member and the cover body, and the elastic member applies an elastic force toward the lock hook to the lock part.

[0013] A further solution is that the elastic member is a spring, and the spring is arranged along the length direction.

[0014] A further solution is that the cover opening member is provided with a wrench at the operating opening.

[0015] The beneficial effects of the present invention are as follows: by directly welding the power switch to the main control circuit board, utilizing the adjacent connection between the housing and the main control circuit board, and cooperating with two positioning steps to fix the power switch, the power switch is fixed, thereby improving the stability of the power switch; furthermore, by arranging the placement groove and the upper opening, and guiding the guide plate, the assembly and positioning of the power switch are facilitated; and by arranging a separately movable cover opening member on the cover body, the cover body can be locked from both sides, thereby achieving a simplified locking structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of an embodiment of the thermal printer of the present utility model.

[0017] Figure 2 This is a structural diagram of an embodiment of the thermal printer of the present invention when the cover is opened.

[0018] Figure 3 It is an exploded view of an embodiment of the thermal printer of the present utility model.

[0019] Figure 4 It is a structural diagram of the shell of the thermal printer embodiment of the present invention.

[0020] Figure 5 It is a cross-sectional view of the thermal printer embodiment of the present utility model at the power switch.

[0021] Figure 6 It is a cross-sectional view of an embodiment of a thermal printer of the present invention at the opening of the cover.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0023] Reference Figures 1 to 6 The thermal printer includes a base 1, a cover 2, a rubber roller 103, a thermal film 104 and a main control circuit board 3. The base 1 is provided with a paper bin 102. The cover 2 is hinged to the base 1 and covers the paper bin 102. A paper outlet 101 is formed between the cover 2 and the base 1. The rubber roller 103 is provided on the base 1, and the thermal film 104 is provided on the cover 2. The thermal film 104 and the rubber roller 103 are opposite to each other and form a paper feeding channel. The rubber roller 103 and the thermal film 104 extend along the paper width direction Y respectively. The paper feeding channel is connected between the paper outlet 101 and the paper bin 102.

[0024] The base 1 includes an inner base 11 and an outer shell 12. A power switch 31 is welded to the main control circuit board 3. The main control circuit board 3 is arranged horizontally and fixed to the bottom of the inner base 11. The paper bin 102 is located above the inner base 11, and the main control circuit board 3 is located at the bottom of the paper bin 10. The longitudinal direction X, the paper width direction Y, and the vertical direction Z are mutually perpendicular. The longitudinal direction X and the paper width direction Y are each one of the horizontal directions, and the longitudinal direction X and the paper width direction Y are parallel to the horizontal plane.

[0025] The power switch 31 includes a shell 311, a button 313 and a pin 314. The shell 311 extends in the horizontal direction. The pin 314 is located on the inner side of the shell 311 based on the horizontal direction. The pin 314 is bent in an L shape. The button 313 is located on the outer side of the shell 311 based on the horizontal direction. The pin 314 is welded to the main control circuit board 3. The shell 311 is provided with a limiting ridge 312 on the outer periphery of the button 313. The bottom of the inner seat 11 is provided with a horizontal plate 111 and a vertical plate 113. The horizontal plate 111 and the vertical plate 113 form a first positioning step 112. The upper part of the limiting ridge 312 is located on the outer side of the first positioning step 112 and is limited by the first positioning step 112.

[0026] The outer shell 12 is provided with a bottom wall 123 and a peripheral wall located on the outer periphery of the bottom wall 123, and the peripheral wall includes a side wall 121, a front end wall 1221 and a rear end wall 1222 located on both sides of the paper width direction Y. The side wall 121, the front end wall 1221, the rear end wall 1222 on one side and the side wall 121 on the other side are connected end to end, and the front end wall 1221 and the rear end wall 1222 are located on both sides of the length direction X. Then the bottom wall 123 and the peripheral wall form a accommodating cavity 120, and one of the side walls 121 is penetrated by an opening 123, and the side wall 121 is provided with a second positioning step 126 at the bottom of the opening 123, and the second positioning step 126 is located on the inner side of the side wall 121.

[0027] The side wall 121 is provided with a placement groove 124 on the inner side of the opening 123, and the placement groove 124 is provided with side retaining walls 125 on both sides of the length direction X. The placement groove 124 is provided with a bottom retaining wall 129 at the bottom of the vertical direction Z. The placement groove 124 has an upper opening above the vertical direction Z, and the second positioning step 126 is provided on the bottom retaining wall 129. The side wall 121 is connected to a guide plate 127 vertically above the side retaining wall 125, and a guide groove is formed between the two guide plates 127.

[0028] The inner seat 11 and the main control circuit board 3 are installed in the accommodating cavity 120, and the shell 311 of the power switch 31 is installed from the upper opening to the placement groove 124 along the guide groove. The button 313 is located at the opening 123, and the lower part of the limiting protrusion 312 is located on the outer side of the second positioning step 126 and is limited by the second positioning step 126. The end of the horizontal plate 111 is adjacent to the inner surface of the side wall 121, and cooperates with the shell 311 to be adjacent to the upper surface of the main control circuit board 3, thereby stabilizing the position of the power switch 31.

[0029] The cover body 2 is provided with two slide grooves 24 near the paper outlet 101, and the slide grooves 24 extend along the length direction X. The two slide grooves 24 are respectively located on both sides of the paper width direction Y. The slide groove 24 is connected to an entrance 21 vertically below, and the slide groove 24 is connected to an operation port 22 on the outside of the paper width direction Y. The base 1 is provided with two lock hooks 15 near the paper outlet 101, and the lock hooks 15 extend along the vertical direction Z. The two lock hooks 15 are respectively located on both sides of the paper width direction Y.

[0030] The thermal printer includes two cover opening members 23 and two elastic members 231. The elastic members 231 are springs, which are arranged along the length direction X. One cover opening member 23 and one elastic member 231 are arranged in a slide groove 24. The cover opening member 23 moves along the length direction X in the slide groove 24. The cover opening member 23 is provided with a lock groove 232 connected to the inlet 21. A lock portion 233 is provided in the lock groove 232. The lock portion 233 is arranged in a hook shape. The cover opening member 23 is provided with a wrench 234 at the operating port 22.

[0031] When the cover 2 is closed, the lock hook 15 enters the lock slot 232 from the entrance 21, the lock portion 233 engages with the lock hook 15, and the elastic member 231 is connected between the cover opening member 23 and the cover 2. The elastic member 231 applies an elastic force to the lock portion 233 toward the lock hook 15. When the cover 2 is opened, the cover opening members 23 on both sides are pulled, and the lock portion 233 is separated from the lock hook 15. Then, the lock hook 15 can be disengaged from the lock slot 232, and the cover is opened.

[0032] Of course, other types of elastic members, such as torsion springs, tension springs, etc., can also achieve elastic reset and elastic holding of the cover. In addition to the above embodiment, the opening can also be set at other positions of the peripheral wall, and the power switch can be set accordingly to achieve the purpose of this case.

[0033] Moreover, the above-mentioned power switch and cover opening structure can also be applied to another model or type of thermal printer, such as a thermal sheet arranged on a base, and a rubber roller rotatably arranged on a cover. This type of printer can also achieve the purpose of the invention of this case by applying the power switch and cover opening structure of this case.

Claims

1. A thermal printer with an integrated power switch, comprising a base, a cover, a rubber roller, a thermal sheet, and a main control circuit board; the base being provided with a paper bin; the cover being hingedly connected to the base and covering the paper bin; a paper outlet being formed between the cover and the base; one of the rubber roller and the thermal sheet being disposed on the base; and the other of the rubber roller and the thermal sheet being disposed on the cover; the thermal sheet and the rubber roller facing each other and forming a paper feed path, the paper feed path communicating between the paper outlet and the paper bin; Its characteristics are: The base includes an inner base and an outer shell, a power switch is welded on the main control circuit board, and the main control circuit board is arranged in a horizontal direction and fixed to the bottom of the inner base; The power switch includes a housing, a button, and a pin. The housing extends in a horizontal direction, the pin is located on a side of the housing that is closer to the inside in the horizontal direction, and the button is located on a side of the housing that is closer to the outside in the horizontal direction. The pin is welded to the main control circuit board. The housing is provided with a limiting convex edge on the periphery of the button. A first positioning step is provided at the bottom of the inner seat. The upper portion of the limiting convex edge is located on the outer side of the first positioning step and is limitedly engaged with the first positioning step. The shell is provided with a bottom wall and a peripheral wall located on the outer periphery of the bottom wall, the bottom wall and the peripheral wall form an accommodating cavity, the peripheral wall is penetrated by an opening, the peripheral wall is provided with a second positioning step at the bottom of the opening, the inner seat and the main control circuit board are installed in the accommodating cavity, the button is located at the opening, and the lower part of the limiting protrusion is located on the outer side of the second positioning step and is limited by the second positioning step.

2. The thermal printer according to claim 1, wherein: The peripheral wall includes side walls, a front end wall and a rear end wall located on both sides of the paper width direction, the front end wall and the rear end wall are located on both sides of the length direction, the opening is located on the side wall, and the second positioning step is located on the inner side of the side wall.

3. The thermal printer according to claim 2, wherein: The side wall is provided with a placement groove on the inner side of the opening, the placement groove is provided with side retaining walls on both sides of the length direction, the placement groove is provided with a bottom retaining wall at the bottom in the vertical direction, the placement groove has an upper opening above the vertical direction, the second positioning step is provided on the bottom retaining wall, and the shell is installed into the placement groove from the upper opening.

4. The thermal printer according to claim 3, wherein: The side wall is connected to a guide plate vertically above the side baffle wall.

5. The thermal printer according to claim 1, wherein: The housing is adjacent to the upper surface of the main control circuit board.

6. The thermal printer according to claim 5, wherein: The pin is bent in an L shape.

7. The thermal printer according to claim 1, wherein: A transverse plate and a longitudinal plate are provided at the bottom of the inner seat, the transverse plate and the longitudinal plate form the first positioning step, and an end portion of the transverse plate is adjacent to the inner surface of the peripheral wall.

8. The thermal printer according to any one of claims 1 to 7, wherein: The cover body is provided with two chutes near the paper outlet, the chutes extending along the length direction, the two chutes are respectively located on both sides of the paper width direction, the chutes are connected with an entrance vertically below, and the chutes are connected with an operation port on the outside in the paper width direction; The base is provided with two locking hooks near the paper outlet, and the two locking hooks are respectively located on both sides in the paper width direction; The thermal printer includes two cover opening members and two elastic members, one of the cover opening member and the elastic member is arranged in the slide groove, the cover opening member moves along the length direction in the slide groove, the cover opening member is provided with a lock groove connected to the entrance, a lock portion is provided in the lock groove, the lock hook enters the lock groove from the entrance, the lock portion and the lock hook are detachably engaged, the elastic member is connected between the cover opening member and the cover body, and the elastic member applies an elastic force to the lock portion toward the lock hook.

9. The thermal printer according to claim 8, wherein: The elastic member is a spring, and the spring is arranged along the length direction.

10. The thermal printer according to claim 8, wherein: The cover opening member is provided with a wrench at the operating port.

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