TWI422209B - Key module and portable eletronic device using the same - Google Patents

Description

Button module and portable electronic device using the same

The invention relates to a button module and a portable electronic device using the button module.

With the development of wireless communication and information processing technology, portable electronic devices such as mobile phones and personal digital assitants (PDAs) are competing to emerge, enabling consumers to fully enjoy the convenience brought by high technology whenever and wherever possible. In the portable electronic device, the button as a user input has become an indispensable part of the portable electronic device.

The button module of the conventional portable electronic device generally only includes a button cover and a key cap, and the button cover is adhered to the key cap. The key cap is an elastic body which can be deformed by an external force and restored to a shape after the external force is removed. The button module is sleeved in the housing hole of the portable electronic device, and a fine gap is formed between the button module and the portable electronic device. If the button module is frequently placed in a humid or rainy day, the water or water vapor may penetrate into the portable electronic device through the small gap between the button and the mobile phone casing, thereby affecting the portable electronic device. The circuit board operating system. In addition, the floating dust in the air can affect the performance of the mobile phone if it enters the inside of the mobile phone.

In order to avoid accidental water ingress or dust in life, it is caused in portable electronic devices. The board is often damaged by water and dust. In the prior art, the waterproof keyboard is often wrapped with a waterproof film on the surface of the button, but the process is complicated, difficult to control, and the waterproof film is easily damaged. In addition, the key cap is also adhered to the casing of the portable electronic device by using an adhesive form. However, since the key cap is generally a soft body, and the soft body is difficult to be bonded to the casing, the bonding effect is obtained. Not ideal, which affects the waterproof and dustproof effect.

In view of this, it is necessary to provide a button module that can improve waterproof and dustproof performance.

In addition, it is also necessary to provide a portable electronic device using the button module.

A button module includes a button cover and a key cap. The button cover is adhered to the key cap. The button module further includes a base body. The base body is a hard body, and the key cap is disposed on the base body. on.

A portable electronic device includes a casing, a circuit board and a button module. The casing includes a peripheral wall. The peripheral wall defines a button hole. The button assembly includes a button cover and a key cap. The button cover is adhered to the key cap, and the button cover and the key cap are sleeved in the button hole. The button module further includes a base body. The base body is a hard body, and the key cap is disposed on the base body. The substrate is adhered to the peripheral wall by an adhesive.

Compared with the prior art, the button module has its key cap bonded to its base body, and the base body is a hard body, and the hard body can be firmly adhered to the portable electronic device using the button module. On the case. In addition, the portable electronic device adheres the button module to the peripheral wall of the casing by adhesive, thereby preventing moisture or dust from being well protected. The assembly gap between the button cover and the button hole enters the accommodating cavity of the casing.

10‧‧‧Key Module

12‧‧‧Key cover

122‧‧‧ bottom wall

124‧‧‧Walls

126, 223‧‧‧ 容 cavity

14‧‧‧Key body

142‧‧‧Key Cap

1421‧‧‧ positive

1422‧‧‧Back

1423‧‧‧ Groove

1424‧‧‧Bumps

1445‧‧‧ bumps

1425‧‧‧Flange

1426‧‧‧Contacts

1427‧‧‧With holes

144‧‧‧ base

1441‧‧‧ first surface

1442‧‧‧ second surface

1443‧‧‧through hole

1444‧‧‧ accommodating slots

20‧‧‧Portable electronic devices

22‧‧‧Shell

221‧‧‧Wall

2212‧‧‧Key hole

222‧‧‧ bottom wall

30‧‧‧Viscos

1 is a perspective exploded view of a key module according to a preferred embodiment of the present invention; FIG. 2 is a perspective exploded view of another embodiment of the key module of the preferred embodiment of the present invention; FIG. 3 is a preferred embodiment of the present invention. FIG. 4 is an exploded perspective view of a portable electronic device according to a preferred embodiment of the present invention; FIG. 5 is a schematic view of the assembled electronic device according to a preferred embodiment of the present invention; FIG. Partial section view.

Referring to FIG. 4 and FIG. 5, the preferred embodiment of the present invention is described by taking the button module 10 applied to the casing of the portable electronic device 20 (such as a mobile phone) as an example. The portable electronic device 20 includes a casing 22 and a circuit board (not shown). The casing 22 is a square frame including a peripheral wall 221 and a bottom wall 222. The bottom wall 222 and the peripheral wall 221 define an accommodating cavity 223. The circuit board is disposed on the bottom wall 222 and located in the accommodating cavity 223. A rectangular button hole 2212 is defined in the peripheral wall 221, and the button module 10 is adhered to the peripheral wall 221, and the button module 10 is partially received in the button hole 2212. At the same time, the button module 10 is disposed corresponding to the circuit board, so that the information input of the portable electronic device 20 is realized by the button module 10.

Referring to FIG. 1 , FIG. 2 and FIG. 3 , the button module 10 of the preferred embodiment of the present invention includes a button cover 12 and a button body 14 . The button cover 12 is disposed on the button body 14 .

The button cover 12 is substantially a rectangular button housing and includes a bottom wall 122 and a peripheral wall 124. The bottom wall 122 and the peripheral wall 124 define an accommodating cavity 126 for engaging with the button body 14.

The button body 14 includes a keycap 142 and a base 144. The key cap 142 is disposed on the base 144.

The keycap 142 is an elastic body, such as an elastic rubber, which can be deformed by an external force and restored to a shape after the external force is removed.

The keycap 142 has a front surface 1421 and a back surface 1422 opposite the front surface. The middle portion of the front surface 1421 is recessed toward the back surface 1422, so that a rectangular recess 1423 is formed on the front surface 1421. Correspondingly, a rectangular bump 1424 is formed on the back surface 1422. The key cap 142 itself forms a flange 1425 surrounding the recess 1423. Similarly, the flange 1425 also surrounds the projection 1424. The protrusion 1424 is received in the receiving cavity 126 of the button cover 12 to integrate the button cover 12 and the key cap 142.

The groove bottom of the groove 1423 is convexly provided with a plurality of truncated body contacts 1426, and the number of the contacts 1426 may be different according to actual needs. In this embodiment, two contacts, the contact 1426 and the portable type Corresponding to the signal sensing point on the circuit board of the electronic device 20, the contact 1426 is used to press the contact sensing area of the circuit board to sense the input information. The key cap 142 defines a plurality of matching holes 1427 formed in the flange thereof. The matching holes 1427 penetrate the front surface 1421 and the rear surface 1422, and the matching holes 1427 are disposed around the groove 1423. The mating hole 1427 is for mating with the base 144.

The base 144 is a hard body, such as a hard plastic. The base 144 is made of a hard body because the button module 10 is adhered to the portable electronic device 20 . The base 144 is bonded to the peripheral wall 221 of the portable electronic device 20, and the base 144 is a hard body to firmly adhere the base 144 to the peripheral wall 221.

The base 144 is substantially a square annular plate-like body including a first surface 1441 and a second surface 1442 opposite the first surface 1441. The second surface 1442 is a surface that engages the keycap 142. A through hole 1443 is formed in the middle of the base 144. The shape and size of the through hole 1443 are substantially the same as the shape and size of the recess 1423 of the key cap 142. The through hole 1443 is disposed corresponding to the groove 1423, and the through hole 1443 passes the contact 1426 of the key cap 142 through the base 144. The receiving portion 1444 defines a shape and a size corresponding to the shape and size of the flange 1425 of the key cap. The receiving groove 1444 is for receiving the flange 1425. The base 144 has a plurality of protrusions 1445 protruding from the bottom wall forming the receiving groove 1444. The protrusions 1445 are correspondingly disposed with the matching holes 1427 of the key cap 142. The protrusion 1445 is received in the fitting hole 1427.

When the button module 10 is assembled, the following steps can be performed: firstly, the flange 1425 of the key cap 142 is adhered to the receiving groove 1444 of the base body, and the protrusion 1445 of the base body 144 is adhered to the key. The keyhole 142 is tightly engaged with the base 144 to prevent moisture and dust from passing through the joint surface of the key cap 142 with the base 144; and then the bump 1424 of the key cap 142 is bonded. The assembly of the button module 10 is completed in the accommodating cavity 126 of the button cover 12.

When the button module 10 is mounted on the portable electronic device 20, please refer to FIG. 4 to FIG. 6 , which can be performed as follows: firstly, the peripheral wall 221 of the portable electronic device 20 adjacent to the button hole 2212 is attached. An adhesive 30 having a shape and a size corresponding to the shape and size of the second surface 1442 of the base 144 of the button module 10, the double-sided tape Preferably, the waterproof adhesive is used to effectively prevent moisture from entering the portable electronic device 20; and then the button module 10 is adhered to the peripheral wall 221 of the portable electronic device 20, specifically, the button module 10 is The button cover 12 and the key cap 142 are received in the button hole 2212 of the peripheral wall 221, and the base body 14 of the button group 10 and the peripheral wall 221 are integrally bonded by the adhesive 30, that is, the button module is completed. 10 is mounted on the portable electronic device 20.

The button module of the prior art is not provided with a base body, but only a button cover and a key cap are provided, and the key cap is an elastic body, and the elastic body is difficult to be adhered to the casing of the portable electronic device. The key module 142 of the present invention has its key cap 142 adhered to the base 144 thereof, and the base body 144 is a hard body, and the hard body can be firmly adhered to the portable electronic device using the button module 10. On the casing 221.

In addition, the button module 10 is adhered to the inner side of the peripheral wall 221 of the casing 11 by the adhesive, thereby preventing moisture or dust from entering the casing 11 through the assembly gap between the button cover 12 and the button hole 2212. Capacitance inside the cavity.

It can be understood that the bonding between the button cover 12, the keycap 142 and the base 144 is not limited to adhesive bonding, and can be integrally formed by two-color two-material molding.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and the scope of the present invention is not limited to the above embodiments, and those skilled in the art will be able to make equivalent modifications or variations in accordance with the spirit of the present invention. It should be covered by the following patent application.

10‧‧‧Key Module

12‧‧‧Key cover

142‧‧‧Key Cap

144‧‧‧ base

Claims (6)

A button module includes a button cover and a key cap, and the button cover is adhered to the key cap. The improvement is that the button module further includes a base body, the base body is a hard body, and the base body is oriented A plurality of protrusions are formed on the surface of the keycap, and a plurality of protrusions are protruded from the bottom wall of the keycap. The side of the keycap forms a groove and a flange surrounding the groove, corresponding to another Forming a bump on one side, the key cap is provided with a plurality of matching holes on the flange thereof, the flange is received in the receiving groove, and the protrusion is received in the matching hole to the key cap It is disposed on the substrate. The button module of claim 1, wherein the key cap is recessed toward a surface away from the base body toward a surface of the base body to form a groove, and the key cap is convex on a bottom wall forming the groove. A plurality of contacts are disposed, and a through hole is formed in the corresponding portion of the base and the groove to allow the contact to pass through the base. The button module of claim 1, wherein the key cap is disposed on the base body by adhesive bonding or two-color two-piece molding. A portable electronic device includes a casing, a circuit board and a button module. The casing includes a peripheral wall. The peripheral wall defines a button hole. The button assembly includes a button cover and a key cap. The button cover is adhered to the key cap, and the button cover and the key cap are sleeved in the button hole. The improvement is that the button module further includes a base body, the base body is a hard body, and the base body is oriented A plurality of protrusions are formed on the surface of the keycap, and a plurality of protrusions are protruded from the bottom wall of the keycap. The side of the keycap forms a groove and a flange surrounding the groove, corresponding to another Forming a bump on one side, the key cap is provided with a plurality of matching holes on the flange thereof, and the flange is received in the receiving groove, the convex The pick-up is placed in the mating hole to place the key cap on the base body, and the base body is adhered to the peripheral wall by an adhesive. The portable electronic device of claim 4, wherein the key cap is recessed toward a surface away from the base body toward a surface of the base body to form a recess, and the key cap is formed on a bottom wall of the recess. A plurality of contacts are disposed on the upper portion, and a through hole is formed in the corresponding portion of the base and the groove to allow the contact to pass through the base. The portable electronic device of claim 5, wherein the key cap is disposed on the substrate by adhesive bonding or two-color two-piece molding.