CN111884645A - Key Modules and Electronic Scales - Google Patents

Abstract

The present application provides a key module and an electronic scale, which include a touch pad, a conductive ring, a display film, a light source and a circuit board. The touch pad is provided with a light-transmitting area, and the touch pad is in direct contact with the conductive ring; the conductive ring and the light source are both electrically connected to the circuit board, and the display film is provided between the light-transmitting area and the light source. When the operator touches the touch pad, the conductive ring senses the touch signal and transmits the signal to the circuit board, and the circuit board controls the light source to turn on. The light emitted by the light source passes through the display film to form a pattern in the light-transmitting area of the touch pad. For example, the pattern can be a symbol, letter or text such as turning on and off the electronic scale or resetting. Since the conductive ring is in direct contact with the touch pad, no isolation member is provided between the conductive ring and the touch pad, and the touch signal acting on the touch pad is transmitted to the conductive member more quickly and timely, thereby improving the sensitivity of the touch key, the key module has a fast response speed, and the user experience is high.

Description

Key Modules and Electronic Scales

technical field

The invention relates to the field of electronic products, in particular to a key module and an electronic scale.

Background technique

At present, electronic products on the market, such as electronic scales, use the key form of touch keys. Most of the touch keys on electronic scales are silk-screened or etched function indicators of the touch keys on the display panel, and the touch key PCB board is pasted under the display panel. ; There are also LED lights under the display panel to illuminate the edge of the silk screen indicator on the panel, but the button indicator in the middle cannot be illuminated, and the lighting is uneven, and the lights at individual positions are dazzling; there are also injection molding on the display panel. Button indicator, set the LED light under the indicator, and set the button spring on the outer ring.

After research, it is found that the existing touch buttons have the following shortcomings:

Low sensitivity when touched.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a key module and an electronic scale, which can improve the sensitivity of touch keys.

Embodiments of the present invention are implemented as follows:

In a first aspect, an embodiment of the present invention provides a button module, which includes:

A touch panel, a conductive ring, a display film, a light source and a circuit board, the touch panel is provided with a light-transmitting area, and the touch panel is in direct contact with the conductive ring; the conductive ring and the light source are both electrically connected to the circuit board, and the display film is provided in the light-transmitting area and the light source between.

In an optional embodiment, the conductive ring is provided with an annular portion and connecting pins, the annular portion is connected with the connecting pins, the annular portion is in contact with the touch panel, and the connecting pins are electrically connected with the circuit board.

In an optional embodiment, a positioning groove is provided on the touch panel, and the annular portion is inserted into the positioning groove.

In an optional embodiment, an annular surface of the annular portion facing away from the touch panel is provided with an annular assembling groove, the display film is located in the annular assembling groove, and the display film is in contact with the groove bottom wall of the annular assembling groove.

In an optional embodiment, the key module further includes a lampshade, the lampshade is connected to the circuit board, and the light source is located in the area enclosed by the lampshade;

The display film is sandwiched between the lampshade and the conductive ring.

In an optional embodiment, a positioning protrusion is provided on the annular surface of the lampshade away from the circuit board, a positioning groove is formed on the outer edge of the display film, the display film is attached to the lampshade, and the positioning protrusion and the positioning groove are engaged with each other. Match up.

In an optional embodiment, there are multiple positioning protrusions, and the multiple positioning protrusions are arranged at intervals in the circumferential direction of the lampshade; there are multiple positioning grooves, and the multiple positioning grooves are one with the multiple positioning protrusions. One-to-one card connection.

In an optional embodiment, the key module further includes a substrate, the touch panel is connected to the substrate, and the two together define an installation area, the conductive ring, the display film, the light source and the circuit board are all located in the installation area, and the circuit board and the substrate are located in the installation area. connect.

In an optional embodiment, the key module further includes an elastic member, the elastic member is arranged between the circuit board and the substrate to make the circuit board move closer to the touchpad, so that the conductive ring always abuts against the touchpad.

In a second aspect, an embodiment of the present invention provides an electronic scale, and the electronic scale includes:

The key module of any one of the preceding embodiments.

The beneficial effects of the embodiments of the present invention are:

In summary, this embodiment provides a case module, including a touch panel, a conductive ring, a display film, a light source and a circuit board, the conductive ring is in contact with the touch panel, the conductive ring and the light source are both electrically connected to the circuit board, and the display film Located between the light source and the light-transmitting area on the touchpad. When the operator touches the touchpad, the conductive ring senses the touch signal and transmits the signal to the circuit board. The circuit board controls the light source to turn on. The light emitted by the light source passes through the display film and forms a pattern in the light-transmitting area of the touchpad. For example, the pattern can be It is a symbol, letter or text such as switching electronic scale or clearing. Since the conductive ring is in direct contact with the touch pad, and there is no spacer between the conductive ring and the touch pad, the touch signal acting on the touch pad is transmitted to the conductive member more quickly and in a timely manner, thereby improving the sensitivity of the touch button and the response speed of the button module. Fast, high user experience.

This embodiment also provides an electronic scale, including the key module mentioned in the above-mentioned embodiment, the key module has high sensitivity, fast response speed, and high user experience.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore do not It should be regarded as a limitation of the scope, and for those of ordinary skill in the art, other related drawings can also be obtained according to these drawings without any creative effort.

1 is a schematic diagram of an exploded structure of a button module according to an embodiment of the present invention;

2 is a schematic diagram of an assembly structure of a key module according to an embodiment of the present invention;

3 is a schematic cross-sectional structural diagram of a key module according to an embodiment of the present invention;

4 is a schematic structural diagram of a touch panel according to an embodiment of the present invention;

5 is a schematic structural diagram of a conductive ring according to an embodiment of the present invention;

FIG. 6 is a schematic structural diagram of a lampshade according to an embodiment of the present invention.

icon:

001-button module; 100-touch panel; 110-light transmission area; 120-positioning slot; 200-conductive ring; 210-ring part; 211-notch; 300-display film; 310-bayonet; 400-light source; 500-circuit board; 600-substrate; 610-support plate part; 620-positioning plate part; ; 712-concentrating cone; 720-plug pin; 730-positioning post; 800-elastic part.

Detailed ways

In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

It should be noted that like numerals and letters refer to like items in the following figures, so once an item is defined in one figure, it does not require further definition and explanation in subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the product of the invention is usually placed in use, only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. Furthermore, the terms "first", "second", "third", etc. are only used to differentiate the description and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that a component is required to be absolutely horizontal or overhang, but rather may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal than "vertical", it does not mean that the structure must be completely horizontal, but can be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise expressly specified and limited, the terms "arranged", "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection, It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or the internal communication between the two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

Referring to FIGS. 1-6 , this embodiment provides a key module 001 that can be applied to an electronic scale. The key module 001 has high sensitivity, rapid response, and high user experience.

Obviously, the key module 001 can also be applied to other electronic products that are not electronic scales, such as microwave ovens, refrigerators, washing machines, or numerically controlled machine tools, etc., which are not listed here.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 . In this embodiment, the key module 001 includes a touch panel 100 , a conductive ring 200 , a display film 300 , a light source 400 and a circuit board 500 . The board 100 is in direct contact with the conductive ring 200 ; the conductive ring 200 and the light source 400 are both electrically connected to the circuit board 500 , and the display film 300 is disposed between the light transmission area 110 and the light source 400 .

In this embodiment, when the operator touches the touch panel 100 , the conductive ring 200 senses the touch signal, and transmits the signal to the circuit board 500 . The circuit board 500 controls the light source 400 to turn on, and the light emitted by the light source 400 passes through the display film 300 and is The light-transmitting area 110 of the touch panel 100 forms a pattern, for example, the pattern may be symbols, letters or characters such as switching an electronic scale or clearing zero. Since the conductive ring 200 is in direct contact with the touch panel 100 and no spacer is provided between the conductive ring 200 and the touch panel 100, the touch signal acting on the touch panel 100 is transmitted to the conductive member more quickly and in a timely manner, thereby improving the sensitivity of the touch keys , the button module 001 has a fast response speed and a high user experience.

At the same time, the display film 300 is hidden under the touch panel 100. When the light source 400 is not turned on, the touch panel 100 blocks the display film 300, and the pattern information on the display film 300 will not be displayed in the light-transmitting area 110 of the touch panel 100, which increases the The mystery of the key module 001 has a higher freshness when the user operates, thereby improving the user's experience. In addition, with this design, the information on the display film 300 is hidden under the touch panel 100, which is not easy to be found, and it is not easy to guide children to press the keys, thereby improving the safety of the device.

Referring to FIG. 1, in this embodiment, optionally, the key module 001 further includes a substrate 600, the touch panel 100 is connected to the substrate 600, and the two together define an installation area, the conductive ring 200, the display film 300, the light source 400 and the circuit The boards 500 are all located in the mounting area, and the circuit board 500 is connected with the substrate 600 . The whole key module 001 has a high degree of integration and is easy to assemble, and the conductive ring 200 , the display film 300 , the light source 400 and the circuit board 500 are not directly exposed to the external environment and are not easily damaged.

Optionally, the base plate 600 includes a support plate portion 610 and a positioning plate portion 620. The positioning plate portion 620 is connected to the support plate portion 610 and the plate surfaces of the two have an included angle, and the included angle is an obtuse angle. The circuit board 500 is mounted on the positioning plate portion 620 , and the circuit board 500 is parallel to the positioning plate portion 620 , that is, the circuit board 500 and the supporting plate portion 610 have an obtuse angle; the supporting plate portion 610 is connected to the touch panel 100 .

It should be noted that, the support plate portion 610 and the touch panel 100 may be connected by a buckle structure, or by a screw connection, or by a riveted structure.

Referring to FIG. 4 , in this embodiment, optionally, the touch panel 100 has an outer panel surface for the operator to contact and an inner panel surface opposite to the outer panel surface. The inner panel surface is provided with a positioning groove 120 , and the positioning groove 120 may be a circular slot, a square slot, or the like.

Referring to FIG. 5 , in this embodiment, optionally, the conductive ring 200 includes an annular portion 210 , an enclosure 220 and a connecting pin 230 . Matching, it can be snapped into the positioning groove 120 . The annular portion 210 has an outer annular surface that is in direct contact with the inner surface of the touchpad 100 and an inner annular surface opposite to the outer annular surface, and an outer edge of the inner annular surface is provided with an enclosure 220, which is common with the annular portion 210. An annular assembly groove 240 is defined, the inner annular surface is the groove bottom wall of the annular assembly groove 240 , and the inner peripheral wall of the enclosure 220 is the groove peripheral wall of the annular assembly groove 240 . The enclosure 220 may be a circular cylinder, the annular fitting groove 240 may be a circular groove, and the annular fitting groove 240 , the enclosure 220 and the annular portion 210 are coaxially disposed. The connecting pins 230 are connected to the enclosure 220 and are used for being plugged on the circuit board 500 .

Further, the annular portion 210 is further provided with a positioning notch 211 , the positioning notch 211 penetrates through the annular portion 210 along the axial extension direction of the annular portion 210 , and the positioning notch 211 may be a rectangular opening or the like.

In addition, the number of positioning notches 211 may be multiple, and the plurality of positioning notches 211 are evenly spaced in the circumferential direction of the annular portion 210 , for example, the number of positioning notches 211 is two.

Optionally, the number of the connecting feet 230 is two, and the two connecting feet 230 are evenly spaced in the circumferential direction of the enclosure 220 .

It should be noted that the enclosure 220 and the connecting feet 230 may be integrally formed, or the enclosure 220 , the connecting feet 230 and the annular portion 210 may be integrally formed.

Referring to FIG. 6 , in this embodiment, optionally, the key module 001 further includes a lampshade 700 , and the lampshade 700 includes a cover body 710 , a plug pin 720 and a positioning post 730 . Both the plug pins 720 and the positioning posts 730 are connected to the cover body 710 .

Optionally, the cover body 710 is provided with a light-passing hole 711 , and at least a part of the hole wall of the light-passing hole 711 is a condensing cone surface 712 . For example, the light-passing hole 711 includes a coaxial and communicating first hole section and a second hole section, the first hole section is a cylindrical hole, and the second hole section is a conical hole, that is, the hole wall of the second hole section For the condensing cone. The smaller open end of the second hole segment communicates with the first hole segment.

Optionally, the number of the plug pins 720 may be multiple, and the plurality of plug pins 720 are all connected to the cover body 710 and are evenly spaced in the circumferential direction of the cover body 710 . For example, the number of the plug pins 720 is two. The plug pins 720 are used for fixed connection with the circuit board 500 .

Optionally, the end face of the larger open end of the second hole segment is provided with a positioning post 730, the positioning post 730 does not protrude from the outer peripheral surface of the cover body 710 in the radially outward direction of the second hole segment, and the positioning post 730 It does not protrude into the second hole segment in the radially inward direction of the second hole segment. The number of the positioning columns 730 may be multiple, and the multiple positioning columns 730 are evenly spaced in the circumferential direction of the second hole segment. For example, the number of the positioning columns 730 is two.

In this embodiment, optionally, the display film 300 may be an LED film, and the display film 300 may be screen-printed with pattern information set thereon. Obviously, the display film 300 can also be other types of film structures.

Optionally, the display film 300 has a circular structure, and the outer edge of the display film 300 is provided with a bayonet 310 . For example, in this embodiment, the number of the bayonet openings 310 on the display film 300 is two, and the two bayonet openings 310 are evenly spaced in the circumferential direction of the display film 300 .

In this embodiment, optionally, the key module 001 further includes an elastic member 800, and the elastic member 800 may be a rubber pad, an elastic sheet, a spring, a sponge pad, or the like.

The key module 001 provided in this embodiment can be assembled in the following manner, for example:

Referring to FIG. 1 or FIG. 3 , the conductive ring 200 , the display film 300 , the light source 400 , the lampshade 700 , the circuit board 500 and the elastic member 800 are assembled to form a sub-unit. Specifically, the elastic member 800 is fixed on the back side of the circuit board 500 , and the light source 400 is welded on the front side of the circuit board 500 to be electrically connected to the circuit board 500 . Then use the plug pins 720 of the lampshade 700 to be plugged on the circuit board 500, so that the light source 400 is located in the middle of the first hole section, and the light emitted by the light source 400 can be collected under the action of the hole wall of the second hole section and directed toward the first hole section. The second hole segment propagates away from the open end of the first hole segment. The display film 300 is attached to the end face of the second hole segment away from one end of the hole segment, and the two bayonet openings 310 on the display film 300 are in one-to-one correspondence with the two positioning posts 730 on the cover body 710 and are snap-fitted, thereby realizing The initial positioning of the film 300 is shown. Then, the conductive ring 200 is sleeved outside the lampshade 700 , and the connecting pins 230 on the conductive ring 200 are fixed and electrically connected to the circuit board 500 . The display film 300 is located in the annular fitting groove 240 on the conductive ring 200 , and the two notches 211 on the annular portion 210 correspond to the two positioning posts 730 on the cover 710 one-to-one and are snap-fitted, thereby completing the assembly of the display film 300 . Repositioning, so far, the positioning and assembly of the conductive ring 200 , the display film 300 , the light source 400 , the lampshade 700 and the circuit board 500 are completed to form a subunit. Then, the elastic member 800 of the subunit is abutted against the positioning plate portion 620 of the base case, and the circuit board 500 is fixed on the positioning plate portion 620, and then the touch pad 100 is covered on the conductive ring 200. The annular shape of the conductive ring 200 The part 210 is snapped into the positioning groove 120 on the inner surface of the touchpad 100 , and the touchpad 100 is fixedly connected with the substrate 600 , and finally the assembly of the key module 001 is completed.

It should be noted that the assembly of the key module 001 may also be completed in other sequences.

In the key module 001 provided in this embodiment, the touchpad 100 and the support plate portion 610 of the substrate 600 have an included angle, so that the touchpad 100 is in an inclined state, which is convenient for use.

In the button module 001 provided in this embodiment, since the bayonet 310 is provided on the display film 300 and is snap-fitted with the positioning post 730 on the cover body 710 , the display film 300 needs less materials to be processed and costs are reduced. For example, take a film with a diameter D as an example for comparison:

When processing the display film 300 provided in this embodiment, a film with a diameter of D is first processed on the blank, and then a portion of the film is removed to form a bayonet 310 .

When processing the protrusion on the film to match the structure of the groove formed on the lampshade 700, it is necessary to first process the film D1 with a diameter larger than D on the blank, and then cut the edge of the film. The diameter of the diaphragm is D, and the diameter of the protruding portion is still D1, which increases the cost of the diaphragm structure.

That is, the diaphragm structure provided in this embodiment has few consumables and low cost.

In the key module 001 provided in this embodiment, the conductive ring 200 is in direct contact with the touch panel 100 , and has high sensitivity, fast response speed, and high user experience.

This embodiment also provides an electronic scale, including the key module 001 provided in the above embodiment, the touch panel 100 of the key module 001 can be integrally formed with the face cover of the electronic scale, and the substrate 600 of the key module 001 can be integrated with the bottom case of the electronic scale One piece.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims (10)

1. a key module, is characterized in that, it comprises: A touch panel, a conductive ring, a display film, a light source and a circuit board, the touch panel is provided with a light-transmitting area, and the touch panel is in direct contact with the conductive ring; the conductive ring and the light source are both connected to the circuit board Electrically connected, the display film is arranged between the light-transmitting area and the light source. 2. button module according to claim 1, is characterized in that: The conductive ring is provided with an annular portion and a connecting pin, the annular portion is connected with the connecting pin, the annular portion is in contact with the touch panel, and the connecting pin is electrically connected with the circuit board. 3. button module according to claim 2, is characterized in that: The touch panel is provided with a positioning groove, and the annular portion is inserted into the positioning groove. 4. button module according to claim 2, is characterized in that: The annular surface of the annular portion facing away from the touch panel is provided with an annular assembling groove, the display film is located in the annular assembling groove, and the display film is in contact with the groove bottom wall of the annular assembling groove. 5. button module according to claim 1, is characterized in that: The button module further includes a lampshade, the lampshade is connected to the circuit board, and the light source is located in the area enclosed by the lampshade; The display film is sandwiched between the lampshade and the conductive ring. 6. The button module according to claim 5, wherein: The annular surface of the lampshade facing away from the circuit board is provided with a positioning protrusion, the outer edge of the display film is provided with a positioning groove, the display film is attached to the lampshade, and the positioning protrusion is connected with the positioning protrusion. The positioning grooves are snap-fitted. 7. button module according to claim 6, is characterized in that: There are a plurality of the positioning protrusions, and the plurality of the positioning protrusions are arranged at intervals in the circumferential direction of the lampshade; the positioning grooves are provided with a plurality of the positioning grooves and the plurality of the positioning grooves. The positioning protrusions are snapped in one-to-one correspondence. 8. button module according to claim 1, is characterized in that: The button module further includes a substrate, the touch panel is connected to the substrate, and the two together define an installation area, and the conductive ring, the display film, the light source and the circuit board are all located in the installation area. area, and the circuit board is connected to the substrate. 9. The button module according to claim 8, wherein: The button module further includes an elastic member, which is arranged between the circuit board and the base plate, and is used to make the circuit board move closer to the touch panel, so that the conductive ring is always against the touchpad. 10. An electronic scale, wherein the electronic scale comprises: The button module according to any one of claims 1-9.

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