CN214505309U

CN214505309U - Key module and thermal printer

Info

Publication number: CN214505309U
Application number: CN202120663930.0U
Authority: CN
Inventors: 罗磊; 申小丹
Original assignee: Zhuhai Hengsheng Barcode Equipment Co Ltd
Current assignee: Zhuhai Hengsheng Barcode Equipment Co Ltd
Priority date: 2021-03-31
Filing date: 2021-03-31
Publication date: 2021-10-26
Anticipated expiration: 2031-03-31

Abstract

The utility model relates to the technical field of printers, a thermal printer is disclosed, including upper cover and following button module, the inside constant head tank that is equipped with of last shell of upper cover, button module installs in the constant head tank, goes up the shell and has seted up the mounting hole in corresponding position, and the light guide ring is inserted with the button and is located the mounting hole. Still disclose a button module, including circuit board, button and light guide plate, be equipped with contact switch and lamp pearl on the circuit board, the light guide plate is equipped with to the light-focusing groove of indent and the leaded light ring that runs through from top to bottom, and the up end of light guide plate is equipped with the light guide rail, and the last cell wall and the leaded light ring of light-focusing groove are connected to the leaded light rail, and the lamp pearl is located to the light-focusing groove cover, and the button is inserted and is located the leaded light ring, and the button can be followed the leaded light ring and reciprocated, and the button cover is located contact switch. The key module only needs to use one lamp bead, and the light that the light gathering groove was launched the lamp bead assembles, and the light transmission that the leaded light rail will assemble is to the leaded light ring, and light is passed through from the leaded light ring and is in order to show the button position. The design is simplified, the assembly efficiency is improved, and the cost is reduced.

Description

Key module and thermal printer

Technical Field

The utility model relates to a printer technical field especially relates to a button module, still relates to a thermal printer who has this kind of button module.

Background

In order to make the switch key sufficiently obvious, the existing thermal printer can install lamp beads at the position of the key, and in order to make the lighting effect of the module position good, a plurality of lamp beads are used for realization. This increases the complexity of the structural design of the key location and also increases the material cost.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a key module and a thermal printer, which solves the problem that the key position structure of the prior thermal printer is complex in one aspect.

The utility model provides a technical scheme that its technical problem adopted does:

the utility model provides a key module, includes circuit board, button and light guide plate, be equipped with contact switch and a lamp pearl on the circuit board, the both sides of light guide plate are equipped with respectively to the light-focusing groove of indent and the leaded light ring that runs through from top to bottom, the up end of light guide plate is equipped with the light guide rail, last cell wall and the leaded light ring of light-focusing groove are connected to the leaded light rail, the lamp pearl is located to the light-focusing groove cover, the button is inserted and is located the leaded light ring, the button can be followed the leaded light ring and reciprocated, the button cover is located contact switch.

As an improvement of the above technical solution, an upper groove wall of the light-gathering groove is a part of the light guide rail, an inner wall surface of an upper end of the light-gathering groove is a hemispherical surface, a longitudinal section of an upper side wall of the light guide rail is arc-shaped, and two ends of the upper side wall of the light guide rail are connected with an upper end surface of the light guide plate.

As an improvement of the above technical solution, the track of the light guide rail on the upper end surface of the light guide plate is U-shaped, the light guide ring is connected with the U-shaped opening end of the light guide rail, and the light collection groove is located at the U-shaped bottom end of the light guide rail.

As an improvement of the technical scheme, the key comprises a pressing block and a limiting edge arranged at the lower end of the pressing block, the pressing block is inserted in the light guide ring, and the limiting edge is positioned between the light guide ring and the circuit board.

As an improvement of the above technical solution, the lower end of the light guide plate is provided with a plurality of positioning columns, the limiting edge is correspondingly provided with a plurality of positioning holes, and the positioning columns are inserted into the positioning holes.

As an improvement of the technical scheme, the pressing block is cylindrical in shape, the pressing block is hollow, a cross reinforcing piece is arranged on the upper portion inside the pressing block, and the lower end of the cross reinforcing piece is in contact with the upper end of the contact switch.

As an improvement of the above technical scheme, the circuit board is a rectangular board, a first through hole is formed in the middle of the circuit board, the first through hole is located between the contact switch and the lamp bead, an avoiding notch is correspondingly formed in one side of the limiting edge, a second through hole is correspondingly formed in the middle of the light guide plate, and the second through hole is located between the light gathering groove and the light guide ring.

The utility model provides a thermal printer with button module, includes upper cover, organism and foretell button module, upper cover and organism are articulated each other, the upper cover includes shell and last inner cup, the inside of going up the shell is equipped with the constant head tank, button module installs in the constant head tank, go up the shell and still seted up the mounting hole in corresponding position, mounting hole and constant head tank intercommunication, the light guide ring is inserted with the button and is located the mounting hole.

As an improvement of the above technical scheme, a pin column is arranged in the positioning groove, the pin column penetrates through the second through hole and the avoidance notch, a threaded hole is formed in the center of the pin column, a screw is installed in the threaded hole, the screw penetrates through the first through hole, and a screw head of the screw is pressed on the circuit board.

The utility model discloses wherein the beneficial effect of one side has:

according to this disclosed one side, this thermal printer adopts this button module, and this button module only need use a lamp pearl, and the light that the light-focusing groove on the light guide plate was launched with the lamp pearl assembles, and the light guide rail further will assemble transmits the leaded light ring to, and the leaded light ring overlaps in the outside of button, and light is followed the leaded light ring and is passed through to show the button position. The light gathering of the light gathering groove and the light guiding of the light guiding rail and the light guiding ring enable the light efficiency transmitted by the light guiding ring to be uniform, the traditional design is simplified, the assembly efficiency is improved, and the cost is reduced.

Drawings

The present invention will be further described with reference to the accompanying drawings and specific embodiments, wherein:

FIG. 1 is a schematic perspective view of a portion of a thermal printer according to one embodiment of the present invention;

fig. 2 is a schematic perspective view of an upper cover according to one embodiment of the present invention;

fig. 3 is a schematic cross-sectional view illustrating the connection between the key module and the positioning groove according to one embodiment of the present invention;

fig. 4 is an exploded perspective view of the key module according to one embodiment of the present invention;

fig. 5 is a partial structural plan view of the key module according to one embodiment of the present invention;

fig. 6 is a schematic cross-sectional view taken at a-a in fig. 5.

Detailed Description

Referring to fig. 1 and 2, the thermal printer with the key module comprises an upper cover 6, a machine body and the key module, wherein the upper cover 6 and the machine body are hinged to each other, the upper cover 6 comprises an upper shell 61 and an upper inner cover, a positioning groove 63 is formed in the upper shell 61, the key module is mounted in the positioning groove 63, a mounting hole 62 is formed in the corresponding position of the upper shell 61, the mounting hole 62 is communicated with the positioning groove 63, and the light guide ring 32 and the key 2 are inserted into the mounting hole 62.

Specifically, a pin 64 is disposed in the positioning groove 63, the pin 64 passes through the second through hole 36 and the avoiding notch 25, a threaded hole 641 is formed in the center of the pin 64, a screw 65 is installed in the threaded hole 641, the screw 65 passes through the first through hole 11, and a screw head of the screw 65 is pressed on the circuit board 1, that is, the key module is fixed in the positioning groove 63 through the screw 65.

Referring to fig. 3, the utility model discloses a key module, including circuit board 1, button 2 and light guide plate 3, be equipped with contact switch 4 and a lamp pearl 5 on the circuit board 1, the both sides of light guide plate 3 are equipped with the leaded light ring 32 that runs through to the light-focusing groove 31 of indent and from top to bottom respectively, the up end of light guide plate 3 is equipped with light guide rail 33, light guide rail 33 connects light-focusing groove 31's last cell wall and leaded light ring 32, light-focusing groove 31 covers and locates lamp pearl 5, button 2 is inserted and is located leaded light ring 32, button 2 can follow leaded light ring 32 and reciprocate, button 2 covers and is located contact switch 4.

Specifically, this key module only needs to use a lamp pearl 5, and the light of the transmission of lamp pearl 5 is assembled to the light-gathering groove 31 on the light guide plate 3, and light guide rail 33 further will assemble the light transmission to leaded light ring 32, and leaded light ring 32 overlaps in the outside of button 2, and light passes through from leaded light ring 32 to show button 2 position. The light gathering of the light gathering groove 31 and the light guiding of the light guiding rail 33 and the light guiding ring 32 make the light effect transmitted out of the light guiding ring 32 uniform, simplify the traditional design, simplify the assembly, improve the assembly efficiency and reduce the cost.

Further referring to fig. 4 and 5, in order to better transmit the light emitted by the lamp bead 5 to the light guide rail 33, an upper groove wall of the light-gathering groove 31 is a part of the light guide rail 33, an inner wall surface of an upper end of the light-gathering groove 31 is a hemispherical surface 34, a longitudinal section of an upper side wall of the light guide rail 33 is arc-shaped, and two ends of the upper side wall of the light guide rail 33 are both connected with an upper end surface of the light guide plate 3. Like this, the regular change of thickness of cell wall on the groove 31 of gathering has the effect of lens, can gather the light that lamp pearl 5 emitted to great degree to conduct the light guide rail 33, increase the luminance of the light that light guide rail 33 conducts.

The track of the light guide rail 33 on the upper end surface of the light guide plate 3 is U-shaped, the light guide ring 32 is connected with the U-shaped opening end of the light guide rail 33, and the light collection groove 31 is located at the U-shaped bottom end of the light guide rail 33. Light emitted by the lamp beads 5 is transmitted to the light guide rings 32 from two sides of the U-shaped light guide rail 33, two parts of the light guide rings 32 are connected with the light guide rail 33, the uniformity of light effect transmitted out by the light guide rings 32 can be increased, the smoothness of the U-shaped light guide rails is favorable for light transmission, and light loss of the light guide rails 33 in the light guide process can be reduced.

Furthermore, in order to prevent the key 2 from falling off, the key 2 comprises a pressing block 21 and a limiting edge 22 arranged at the lower end of the pressing block 21, the pressing block 21 is inserted into the light guide ring 32, and the limiting edge 22 is positioned between the light guide ring 32 and the circuit board 1. Thus, the stopper edge 22 can move only between the light guide ring 32 and the circuit board 1.

Further, the lower end of the light guide plate 3 is provided with a plurality of positioning columns 35, the limiting edge 22 is correspondingly provided with a plurality of positioning holes 23, and the positioning columns 35 are inserted into the positioning holes 23. The positioning column 35 and the positioning hole 23 are arranged, so that the pressing block 21 can be prevented from rotating, and the stability of the key 2 is improved.

Referring to fig. 6, the pressing block 21 is shaped like a cylinder, the pressing block 21 is hollowed to reduce weight, a cross reinforcing piece 24 is disposed at an upper portion of the inside of the pressing block 21 to increase strength, and a lower end of the cross reinforcing piece 24 contacts an upper end of the contact switch 4.

In this embodiment, circuit board 1 is the rectangular plate, first through-hole 11 has been seted up at the middle part of circuit board 1, first through-hole 11 is located between contact switch 4 and the lamp pearl 5, one side of spacing limit 22 is corresponding has been seted up and has been dodged breach 25, second through-hole 36 has been correspondingly seted up at the middle part of light guide plate 3, second through-hole 36 is located between light-gathering groove 31 and the light guide ring 32.

It is noted that the terms "first," "second," "third," and the like are used herein to describe various elements or components, but these elements or components are not limited by these terms, which are only used to distinguish one element or component from another element or component. And terms such as "first," "second," and other numerical terms when used herein do not imply a sequence or order unless clearly indicated by the context. For convenience of description, spatially relative terms such as "inner", "outer", "upper", "lower", "left", "right", "upper", "left", "right", and the like are used herein to describe the positional relationship of the components or parts in the present embodiment, but these spatially relative terms do not limit the orientation of the technical features in practical use, and the words "inner" and "outer" refer to directions toward or away from the geometric center of a particular component, respectively.

The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the above embodiments, and the technical effects of the present invention should be all included in the protection scope of the present invention as long as the technical effects are achieved by any of the same or similar means.

Claims

1. A key module, comprising: including circuit board (1), button (2) and light guide plate (3), be equipped with contact switch (4) and a lamp pearl (5) on circuit board (1), the both sides of light guide plate (3) are equipped with light guide ring (32) that run through from top to bottom to light-concentrating groove (31) of upper concave respectively, the up end of light guide plate (3) is equipped with light guide rail (33), light guide rail (33) are connected the last cell wall and light guide ring (32) of light-concentrating groove (31), light-concentrating groove (31) cover is located lamp pearl (5), button (2) are inserted and are located light guide ring (32), button (2) can be followed light guide ring (32) and are reciprocated, button (2) cover is located contact switch (4).

2. The key module of claim 1, wherein: the upper groove wall of the light gathering groove (31) is a part of the light guide rail (33), the inner wall surface of the upper end of the light gathering groove (31) is a hemispherical surface (34), the longitudinal section of the upper side wall of the light guide rail (33) is arc-shaped, and two ends of the upper side wall of the light guide rail (33) are connected with the upper end surface of the light guide plate (3).

3. The key module of claim 2, wherein: the track of the light guide rail (33) on the upper end face of the light guide plate (3) is U-shaped, the light guide ring (32) is connected with the U-shaped opening end of the light guide rail (33), and the light collection groove (31) is located at the U-shaped bottom end of the light guide rail (33).

4. A key module according to any one of claims 1-3, wherein: the button (2) comprises a pressing block (21) and a limiting edge (22) arranged at the lower end of the pressing block (21), the pressing block (21) is inserted into the light guide ring (32), and the limiting edge (22) is located between the light guide ring (32) and the circuit board (1).

5. The key module of claim 4, wherein: the lower end of the light guide plate (3) is provided with a plurality of positioning columns (35), the limiting edge (22) is correspondingly provided with a plurality of positioning holes (23), and the positioning columns (35) are inserted into the positioning holes (23).

6. The key module of claim 4, wherein: the pressing block (21) is cylindrical in shape, the pressing block (21) is hollow, a cross reinforcing piece (24) is arranged on the upper portion of the inside of the pressing block (21), and the lower end of the cross reinforcing piece (24) is in contact with the upper end of the contact switch (4).

7. The key module of claim 4, wherein: the LED lamp is characterized in that the circuit board (1) is a rectangular plate, a first through hole (11) is formed in the middle of the circuit board (1), the first through hole (11) is located between the contact switch (4) and the lamp bead (5), an avoiding notch (25) is correspondingly formed in one side of the limiting edge (22), a second through hole (36) is correspondingly formed in the middle of the light guide plate (3), and the second through hole (36) is located between the light gathering groove (31) and the light guide ring (32).

8. A thermal printer having a key module, characterized in that: the key module comprises an upper cover (6), a machine body and the key module as claimed in any one of claims 1 to 7, wherein the upper cover (6) and the machine body are hinged to each other, the upper cover (6) comprises an upper shell (61) and an upper inner cover, a positioning groove (63) is formed in the upper shell (61), the key module is installed in the positioning groove (63), a mounting hole (62) is further formed in the corresponding position of the upper shell (61), the mounting hole (62) is communicated with the positioning groove (63), and the light guide ring (32) and the keys (2) are inserted in the mounting hole (62).

9. The thermal printer having a key module according to claim 8, wherein: be equipped with round pin post (64) in constant head tank (63), second through-hole (36) and dodge breach (25) are worn to locate by round pin post (64), screw hole (641) are seted up to round pin post (64) central authorities, install screw (65) in screw hole (641), first through-hole (11) are worn to locate by screw (65), the screwhead of screw (65) is pressed on circuit board (1).