TWI398892B - Keypad assembly and electronic device using the same - Google Patents

Description

Key assembly and electronic device having the same

The invention relates to a button assembly and an electronic device having the same.

With the development of wireless communication and information processing technology, mobile electronic devices such as mobile phones and personal digital assistants (PDAs) are competing to emerge, enabling consumers to fully enjoy the convenience brought by high technology whenever and wherever possible. Consumers are no longer satisfied with the simple communication functions of receiving electronic devices, such as answering calls, sending and receiving information, etc., and have begun to put forward higher requirements for the entertainment functions and other auxiliary functions of portable electronic devices. For example, they hope that portable electronic devices have MP3, audio and video playback, photography and other functions. As the functions of the portable electronic device increase, corresponding function buttons must be added to the keypad of the portable electronic device or the side wall of the housing to implement functional control of the portable electronic device.

Most of the conventional function buttons are designed with single or double keys, and as the functions of the portable electronic devices continue to increase, more and more functional buttons of the portable electronic devices are designed with multiple keys. The conventional multi-key function button structure is relatively complicated, and the manufacturing cost is relatively high; in the process of use, especially when the middle button of the multi-key function button is pressed, the button adjacent to the middle button is likely to cause a linkage phenomenon, thereby causing a misoperation. Affects the performance of portable electronic devices.

In view of this, it is necessary to provide a button assembly that is simple in structure and can effectively prevent linkage and misoperation between adjacent buttons in use.

It is also necessary to provide an electronic device having the key assembly.

a button assembly comprising a pressing surface and a matching surface opposite to the pressing surface; the pressing surface is laterally convexly provided with a plurality of buttons, wherein the matching surface is provided with a plurality of protruding columns and a plurality of isolation protrusions; The plurality of protrusions are respectively protruded from the mating surface at a position opposite to the button, and the isolation protrusions are respectively protruded between the adjacent two buttons.

An electronic device includes a button assembly and a housing, the button assembly is mounted on the housing; the button assembly includes a pressing surface, a mating surface opposite the pressing surface; and the pressing surface is spaced apart a plurality of buttons, wherein the plurality of protrusions and the plurality of isolation protrusions are disposed on the mating surface; wherein the plurality of protrusions are respectively correspondingly protruded from the mating surface at a position opposite to the button, wherein the spacers are respectively Correspondingly protruding between each adjacent two buttons.

Compared with the prior art, the button assembly is designed to be integrated together by the plurality of buttons, thereby making the structure of the entire button assembly simpler and easier to disassemble. The button assembly effectively isolates the adjacent buttons by virtue of the isolation bumps disposed on the mating surface corresponding to the positions of the adjacent two buttons on the pressing surface, thereby avoiding the pressing process. Misoperation caused by linkage between adjacent buttons.

100‧‧‧ portable electronic device

10‧‧‧ Shell

12‧‧‧ side wall

121‧‧‧ outer surface

123‧‧‧Installation Department

124‧‧‧ bottom wall

1241‧‧‧Induction touch pad

1243‧‧‧ card block

1245‧‧‧ strip opening

126‧‧‧lateral edge

127‧‧‧ card holder

30‧‧‧Key components

31‧‧‧Substrate

311‧‧‧ first surface

3112‧‧‧Sinking blind hole

3113‧‧‧ cylindrical protrusion

3115‧‧‧Rectangular groove

312‧‧‧ second surface

313‧‧‧First engagement end

3131‧‧‧First engagement department

3132‧‧‧First fixed block

3133‧‧‧First fixed through hole

314‧‧‧Second snap end

3141‧‧‧Second engagement department

3142‧‧‧Second fixed block

3143‧‧‧Second fixed through hole

315‧‧‧ first side

316‧‧‧Bend

3161‧‧‧First rectangular gap

317‧‧‧ second side

3172‧‧‧ Second rectangular gap

35‧‧‧Keyboard

351‧‧‧ Pressing surface

3513‧‧‧ button

3515‧‧‧ strip groove

352‧‧‧Material

3521‧‧‧Installing grooves

3522‧‧‧stepped stud

3525‧‧‧Isolation bumps

353‧‧‧First assembly end

3531‧‧‧First rectangular groove

354‧‧‧Second assembly end

3541‧‧‧Second rectangular groove

355‧‧‧First side wall

3551‧‧‧Rectangular notch

3552‧‧‧Resistance of bumps

357‧‧‧ second side wall

3572‧‧‧ hook

1 is a partial perspective view of a key assembly mounted on a portable electronic device housing according to a preferred embodiment of the present invention; and FIG. 2 is a perspective view of the key assembly of FIG. 1 separated from a portable electronic device housing; FIG. FIG. 4 is a perspective view showing the key assembly of the preferred embodiment of the present invention, which is mounted on the outer casing of the portable electronic device; FIG. 4 is a perspective view of the key assembly of FIG. A schematic exploded view of a button assembly in accordance with a preferred embodiment of the present invention; FIG. 6 is a perspective exploded view of the button assembly of FIG. 5 from another perspective.

The preferred embodiment of the present invention discloses a key assembly of a portable electronic device, which is suitable for a portable electronic device such as a mobile phone or a personal digital assitant (PDA) or a digital camera.

Referring to FIG. 1 and FIG. 3 , the portable electronic device 100 includes a housing 10 and a button assembly 30 . The housing 10 includes a sidewall 12 . The button assembly 30 is detachably mounted on the side wall 12 of the casing 10 for controlling various functional modules (not shown) in the portable electronic device 100.

Referring to FIG. 2 and FIG. 4 together, the side wall 12 of the outer casing 10 includes an outer surface 121. The outer surface 121 is recessed to form a substantially rectangular cavity-shaped mounting portion 123 for mounting the button assembly 30. At the same time, a bottom wall 124 and a side edge 126 perpendicular to the bottom wall 124 are formed correspondingly on the side wall 12. The bottom wall 124 is laterally convexly provided with three substantially rectangular block-shaped sensing pads 1241 and a substantially "L" shaped card block 1243. The inductive contact pad 1241 is electrically connected to a corresponding function module (not shown) in the portable electronic device 100 to control the function module by using the electrical signal sent by the inductive touch pad 1241. . The card block 1243 is located between the two sensing pads 1241. A strip-shaped opening 1245 is formed through the bottom wall 124 at both ends parallel to the side edge 126. A positioning post 125 is respectively protruded from a position of the other side of the side wall 12 opposite to the bottom wall 124 corresponding to the strip opening 1245. In the embodiment, the two latching holes 127 are respectively disposed on the side edge 126 and located on the card block 1243. On both sides.

Referring to FIG. 5 and FIG. 6 , the button assembly 30 includes a substrate 31 and a keypad 35 detachably mounted with the substrate 31 . The substrate 31 has a substantially rectangular plate shape and is made of a rubber material or other flexible material. The substrate 31 includes a first surface 311, a first surface 311 An opposite second surface 312 , a first engaging end 313 , a second engaging end 314 opposite to the first engaging end 313 , a first side portion 315 and a first side portion 315 opposite to the first side portion 315 Second side portion 317. The first surface 311 of the substrate 31 is recessed with three countersunk head blind holes 3112 and two rectangular recesses 3115, and correspondingly, a three-column protrusion 3113 is formed on the second surface 312 of the substrate 31 and Two substantially rectangular ribs 3116. The two rectangular recesses 3115 are correspondingly recessed between the adjacent two countersunk head blind holes 3112 on the first surface 311, and the distance between the two rectangular recesses 3115 and the sidewalls 12 The distance between the holding holes 127 is substantially equal. The first engaging end 313 and the second engaging end 314 are respectively bent toward the second surface 312 to form a first engaging portion 3131 and a second engaging portion 3141 which are substantially "L" shaped. A first fixing block 3132 and a second fixing block 3142 are respectively protruded from the first engaging portion 3131 and the second engaging portion 3141 toward one side of the second surface 312. The first fixing block 3132 and the first fixing block 3132 A first fixing through hole 3133 and a second fixing through hole 3143 are defined in the second fixing block 3142, so that the first fixing block 3132 and the second fixing block 3142 are correspondingly fixedly sleeved on the outer casing 10. The positioning post 125 of the side wall 12 is. The first side portion 315 is bent perpendicularly toward the second surface 312 to form a substantially "L"-shaped plate-shaped bent portion 316. The bent portion 316 is firstly directed by the side portion 315 of the substrate 31. The two surfaces 312 are vertically bent and then bent along a direction parallel to the second surface 312 of the substrate 31 and away from the first side portion 315. A first rectangular notch 3161 is defined in the bending portion 316. The size of the first rectangular notch 3161 is equal to the size of the outer block 1243 of the side wall 12, so that the card 1243 can be stuck. The first rectangular notch 3161 is inserted into the first rectangular notch 3161. An edge of the second side portion 317 is spaced apart from the second rectangular recess 3115 by two second rectangular cutouts 3172. The distance between the second rectangular cutouts 3172 and the sidewall 12 is The distance between the two holding holes 127 is substantially equal.

The key sheet 35 has a substantially rectangular plate shape and is made of a plastic material. The key sheet 35 includes a pressing surface 351 , a mating surface 352 opposite to the pressing surface 351 , a first mounting end 353 , and a second mounting end 354 opposite to the first mounting end 353 . The pressing surface 351 is spaced apart from each other There are three buttons 3513, wherein a strip-shaped recess 3515 is formed between each adjacent two buttons 3513. The first surface 355 and a second side wall 357 opposite to the first side wall 355 are formed on the mating surface 352. The mounting recess 3521 is sized to correspond to the outer contour of the first surface 311 of the substrate 31 for being mounted to the substrate 31. A three-stepped protrusion 3522 and two isolation protrusions 3525 are spaced apart from each other on the bottom surface of the mounting surface 352 of the mounting groove 352 corresponding to the three countersunk blind holes 3112 and the two rectangular recesses 3115 of the substrate 31. When the key sheet 35 is mounted on the substrate 31, the three stepped protrusions 3522 and the two isolation protrusions 3525 of the key sheet 35 respectively correspond to the three countersunk head blind holes 3112 and the two rectangles on the substrate 31. The grooves 3115 are held together with each other. The first mounting end 353 of the key sheet 35 and the mating surface 352 of the second mounting end 354 are respectively recessed with a first rectangular recess 3531 and a second rectangular recess 3541 which are in communication with the mounting recess 3521. The first engaging portion 3131 and the second engaging portion 3141 of the substrate 31 respectively correspond to the first rectangular recess of the key sheet 35 when the key sheet 35 is mounted on the substrate 31. 3531 and a second rectangular recess 3541. A rectangular notch portion 3551 communicating with the mounting groove 3521 is formed on the first side wall 355 toward the mating surface 352 of the key plate 35. The two side walls of the rectangular notch portion 3551 are oppositely extended. The bump 3552 is abutted so that when the key sheet 35 is mounted on the substrate 31, the rectangular notch portion 3551 and the first rectangular notch 3161 on the bent portion 316 of the substrate 31 are fitted together. At the same time, the resisting bumps 3552 on the two side walls of the rectangular notch portion 3551 are correspondingly engaged with the first rectangular notch 3161 and are correspondingly held on the substrate 31. Two hooks 3572 are respectively formed on the second side wall 357 , and the two hooks 3572 are corresponding to the two rectangular recesses 3115 on the substrate 31 , so that when the key sheet 35 is mounted on the substrate 31 The two hooks 3572 respectively pass through the second rectangular notches 3172 on the substrate 31 and are correspondingly held in the two holding holes 127 of the side walls 12 .

Referring to FIG. 2, FIG. 4, FIG. 5 and FIG. 6, the key sheet 35 is mounted on the substrate 31 in a latched manner. When the button assembly 30 is assembled, the first surface 311 of the substrate 31 is first paired The first surface 311 of the substrate 31 is correspondingly engaged and disposed in the mounting groove 3521; the bent portion 316 of the substrate 31 is correspondingly disposed. Resisting on the first side wall 355 of the key sheet 35, the rectangular notch portion 3551 on the first side wall 355 of the key sheet 35 and the resisting protrusions 3552 on the two side walls thereof are correspondingly engaged with the substrate 31. The first rectangular notch 3161 is correspondingly held on the substrate 31. The three stepped protrusions 3522 and the two isolation protrusions 3525 in the recess 3521 of the button plate 35 are correspondingly clamped on the first surface 311 of the substrate 31, and the three countersunk blind holes 3112 and the two rectangular recesses. Inside the slot 3115. The two hooks 3572 on the second side wall 357 of the key sheet 35 respectively pass through the second rectangular notches 3172 on the substrate 31 and protrude from the second rectangular notches 3172. The first engaging portion 3131 and the second engaging portion 3141 at the two ends of the substrate 31 respectively correspond to the first rectangular recess 3531 and the second rectangular recess 3541 which are engaged at the two ends of the key sheet 35, that is, the completed The assembly of the button assembly 30 is described.

Referring to FIG. 1 and FIG. 3, when the button assembly 30 is mounted on the sidewall 12 of the casing 10 of the portable electronic device 100, the second surface 312 of the substrate 31 of the button assembly 30 is terminated. The first fixing block 3132 and the second fixing block 3142 at both ends of the substrate 31 of the button assembly 30 respectively pass through the bottom of the side wall 12, respectively, toward the mounting portion 123 on the outer surface 121 of the side wall 12. a strip-shaped opening 1245 at both ends of the wall 124, and the first fixed through-hole 3133 of the first fixing block 3132 and the second fixed through-hole 3143 of the second fixing block 3142 are respectively sleeved on the sidewall 12 On column 125. At the same time, the three columnar protrusions 3113 on the second surface 312 of the substrate 31 of the button assembly 30 respectively correspondingly resist the three sensing pads 1241 on the bottom wall 124 of the side wall 12; The two ribs 3116 on the second surface 312 correspondingly abut against the bottom wall 124. The card 1243 of the side wall 12 is correspondingly engaged with the rectangular notch portion 3551 of the button assembly 30, and the two hooks 3572 of the substrate 31 of the button assembly 30 are respectively correspondingly clamped to the side wall 12 The mounting work of the button assembly 30 is completed in the second card holding hole 127.

In use, the button 3513 of the button assembly 30 is pressed such that the button 3513 pushes the substrate The cylindrical protrusions 3113 on the second surface 312 of the lens 312 move and press the sensing pads 1241 on the sidewall 12 of the portable electronic device 100 to generate an electrical signal to control the corresponding components in the portable electronic device 100. Function module.

It can be understood that the substrate 31 and the key sheet 35 of the button assembly 30 can also be formed by in-mold bijection molding.

It can be understood that the number of the buttons 3513 of the button assembly 30 is not limited to three described in the embodiment, and the number of the buttons 3513 can be increased or decreased according to actual needs.

It can be understood that the number of the cylindrical protrusions 3113 of the substrate 31 and the protrusions 3522 on the key sheet 35 are not limited to three in the embodiment, and the number thereof corresponds to the number of the buttons 3513 of the button assembly 30.

The button assembly 30 includes a substrate 31 and a key sheet 35 mounted on the substrate 31. The button assembly 30 is integrally formed on the button board 35 by the plurality of buttons 3513, so that the structure of the entire button assembly 30 is It becomes simpler and easier to disassemble. The button assembly 30 effectively isolates the adjacent buttons 3513 by virtue of the ribs 3116 disposed on the substrate 31 corresponding to the spaced positions of the adjacent two buttons 3513 on the button plate 35, thereby avoiding pressing. The erroneous operation caused by the linkage between the adjacent buttons 3513 in the process.

100‧‧‧ portable electronic device

10‧‧‧ Shell

12‧‧‧ side wall

30‧‧‧Key components

Claims (14)

A button assembly includes a pressing surface and a matching surface opposite to the pressing surface; and the improvement is that: the pressing surface is convexly provided with a plurality of buttons, and the matching surface is provided with a plurality of protrusions and a plurality of isolation protrusions a block, wherein the plurality of protrusions are respectively protruded from the mating surface at a position opposite to the button, and the isolating protrusions are respectively protruded between the adjacent two buttons. The button assembly includes a button board and a substrate mounted with the button board, and the pressing surface and the mating surface are disposed on the button board. The button assembly of claim 1, wherein the substrate comprises a first surface and a second surface opposite to the first surface; the first surface corresponds to the plurality of studs and a plurality of isolations The bumps are respectively recessed with a plurality of countersunk head blind holes and a plurality of grooves, and correspondingly form a plurality of columnar protrusions and a plurality of ribs on the second surface of the substrate; the protrusions and the isolation protrusions respectively correspondingly The blind head blind holes and the grooves on the substrate are held together. The button assembly of claim 2, wherein the mating surface is recessed to form a mounting recess, and correspondingly defines a first sidewall and a second sidewall opposite the first sidewall. The substrate is mounted in the mounting recess. The button assembly of claim 3, wherein the substrate further includes a first engaging end and a second engaging end opposite to the first engaging end, the first engaging end and the first engaging end The two engaging ends are respectively bent toward the second surface to form a first engaging portion and a second engaging portion; the button plate further includes a first mounting end and a second opposite the first mounting end a first rectangular groove and a second rectangular groove respectively communicating with the mounting groove are respectively recessed on the mating surfaces of the first mounting end and the second mounting end, so as to make the first of the substrates The engaging portion and the second engaging portion are respectively engaged in the first rectangular groove and the second rectangular groove. The button assembly of claim 4, wherein the substrate further comprises a first side portion And a second side portion opposite to the first side portion, the first side portion is bent and bent toward the second surface to form a bent portion, and the bent portion is abutted on the mating surface of the key sheet On the first side wall. The button assembly of claim 5, wherein a first rectangular notch is formed in the bent portion, and a mating end of the first side wall facing the key plate corresponds to the first rectangular notch a rectangular notch portion communicating with the mounting groove is formed in the position, and a pair of opposite side walls of the rectangular notch portion respectively extend to form a resisting protrusion; the resisting bumps on the two side walls of the rectangular notch portion correspondingly The card is held on the first rectangular notch. The button assembly of claim 1, wherein the substrate and the key sheet are formed by in-mold bijection molding. An electronic device includes a button assembly and a housing, the button assembly is mounted on the housing; the button assembly includes a pressing surface and a mating surface opposite the pressing surface; and the improvement is: the pressing surface a plurality of buttons are disposed at intervals, and the plurality of protrusions and the plurality of isolation protrusions are disposed on the mating surface; wherein the plurality of protrusions are respectively correspondingly protruded from the mating surface at a position opposite to the button, The insulative bumps are respectively disposed between the two adjacent buttons. The button assembly includes a button board and a substrate mounted with the button board. The pressing surface and the mating surface are disposed on the board. On the keypad. The electronic device of claim 8, wherein the substrate comprises a first surface and a second surface opposite to the first surface; the first surface corresponds to the plurality of studs and a plurality of isolations The bumps are respectively recessed with a plurality of countersunk head blind holes and a plurality of grooves, and correspondingly form a plurality of columnar protrusions and a plurality of ribs on the second surface of the substrate; the protrusions and the isolation protrusions respectively correspondingly The blind head blind holes and the grooves on the substrate are held together. The electronic device of claim 9, wherein the outer casing comprises a side wall, the outer surface of the side wall is recessed to form a rectangular cavity-shaped mounting portion, and a bottom wall is formed correspondingly on the side wall. And a side edge perpendicular to the bottom wall and parallel to the direction in which the button is disposed; the bottom wall is opposite An inductive touch pad electrically connected to each functional module in the electronic device is disposed at intervals of the button, and the button component is installed in the mounting portion, and the columnar protrusion and the rib respectively correspond to Resisting on the inductive touch pad and the bottom wall. The electronic device of claim 10, wherein the mating surface is recessed to form a mounting recess, and correspondingly defines a first sidewall and a second sidewall opposite the first sidewall. The substrate is mounted in the mounting recess; the substrate further includes a first engaging end, a second engaging end opposite to the first engaging end, the first engaging end and the second card The joint ends are respectively bent toward the second surface to form a first engaging portion and a second engaging portion; the button plate further includes a first mounting end and a second mounting end opposite to the first mounting end a first rectangular groove and a second rectangular groove respectively communicating with the mounting groove are respectively recessed on the mating surfaces of the first mounting end and the second mounting end, so that the first engaging of the substrate The second engaging portion and the second engaging portion are respectively engaged in the first rectangular groove and the second rectangular groove. The electronic device of claim 11, wherein the bottom wall has a strip-shaped opening extending through the two ends parallel to the side edge direction, and the other end of the side wall opposite to the bottom wall A positioning post is respectively disposed at a position corresponding to the strip-shaped opening; a first fixing block and a second fixing block are respectively protruded from the first engaging portion and the second engaging portion toward the second surface side. A first fixed through hole and a second fixed through hole are respectively defined in the first fixed block and the second fixed block, and the first fixed block and the second fixed block are correspondingly fixedly sleeved on the positioning post . The electronic device of claim 12, wherein a first rectangular indentation is formed in the bent portion, and a mating end of the first side wall facing the key sheet corresponds to the first rectangular gap a rectangular notch portion communicating with the mounting groove is formed in the position, and a pair of opposite side walls of the rectangular notch portion respectively extend to form a resisting protrusion; the resisting bumps on the two side walls of the rectangular notch portion correspondingly The card is held on the first rectangular notch, and a card block is protruded from the bottom wall of the side wall, and the card block is held in the first rectangular notch. The electronic device of claim 13, wherein the edge of the second side portion is provided with two second rectangular notches at intervals corresponding to the positions of the two rectangular recesses; Two hooks are protruded at intervals along the second surface of the second rectangular notch on the substrate, and two latching holes are recessed in the side edges, and the two hooks respectively pass through the The second rectangular notches are protruded from the other side and are respectively held in the two holding holes.