TW201348930A - Portable electronic device - Google Patents

Abstract

A portable electronic device includes a shell having a display on a front face thereof and multiple voice holes in a rear face thereof. A speaker is received in the shell corresponding to the voice holes. The rear face of the shell includes a contact face for in contact with a support and a voice outlet face defining the voice holes. The voice outlet face is depressed towards the display relative to the contact face, thereby forming a depression in the rear face of the shell. The depression communicates with the outside environment located at a lateral side of the device so that the voice produced from the speaker can spread to the outside environment through the voice holes and depression. The voice can normally spread to the outside environment even the device is put on the support.

Description

Portable electronic device

The present invention relates to an electronic device, and more particularly to a portable electronic device.

In portable, especially handheld electronic devices, such as mobile phones, tablets, handheld game consoles, and MP4 players, speakers are usually built in to satisfy the user's enjoyment of playing music or playing games. In order to ensure better sound effects, the sound hole of the speaker is preferably placed on the front side of the electronic device, that is, the side on which the display screen is provided.

On the front side of the handheld electronic device, a display screen is usually set, and some buttons for operation are also arranged near the screen. Since the sound hole of the speaker occupies a certain area, if the size of the display screen is large, it is impossible to open a sound hole in the excess position on the front side of the palm-type electronic device. Some people have set the sound hole of the speaker on the side of the handheld electronic device. However, when the user holds the electronic device, it is easy to cover the sound hole, resulting in a drop in sound quality. When it is disposed on the back of the electronic device, although the user does not easily touch the sound hole, when the electronic device is placed on the support (such as the desktop), the sound hole is blocked due to the shielding of the support, and the same. Causes a problem of degraded sound quality.

In view of this, the present invention aims to provide a palm-sized electronic device that does not easily affect sound quality.

A portable electronic device includes a housing having a display area on the front side, a sound hole on the back surface, a speaker corresponding to the sound hole inside the housing, and a rear surface of the housing including a contact surface that can be in contact with the support and opening a sound emitting surface of the sound hole, the sound emitting surface is recessed toward the display area with respect to the contact surface, and a groove is formed on the back surface of the housing, the groove communicates with the external environment of the portable electronic device, and the sound emitted by the speaker passes through the sound hole and the concave hole. The slot is transmitted to the outside environment.

Compared with the prior art, the sound outlet of the speaker is disposed on the back of the electronic device, and the distance between the contact surface and the contact surface is separated by the groove, so that when the contact surface is in contact with the support, the sound hole will not be blocked, thereby The sound is smoothly transmitted to the outside environment, thereby ensuring the sound quality.

1 and 2 show a portable electronic device 100 according to a first embodiment of the present invention. The portable electronic device 100 can be a mobile phone, a tablet computer, a handheld game console, an MP4 player, or the like.

The portable electronic device 100 has a flat housing 10 for housing various components of the portable electronic device 100, such as a circuit board, a processor, a battery, a multimedia module, a speaker, and the like. The front surface of the casing 10 has a display area 111. The back surface of the casing 10 has a flat portion 126 that is centered and parallel to the front surface, and two inclined portions 121 that are bent and extended from both sides of the flat portion 126. The edge of the portion 121 is engaged with the front surface of the casing 10, and each of the inclined portions 121 is provided with a set of sound holes 122. A speaker 20 is disposed inside the casing 10 corresponding to each set of sound holes 122, and the speaker 20 is received in a sound chamber 123.

The housing 10 includes a panel 11 and a rear cover 12 that engages the panel 11. The panel 11 and the rear cover 12 are combined to form a receiving space for receiving components of the portable electronic device 100. The panel 11 includes a substantially rectangular front plate body 112 and a side wall 113 extending from the periphery of the front plate body 112 toward the rear cover 12. The display area 111 is located in the middle of the front plate body 112.

Referring to FIG. 3 together, the rear cover 12 includes a substantially rectangular rear plate body 124 and a side wall 125 extending from the periphery of the rear plate body 124 toward the panel 11. The straight portion 126 is located in the middle of the rear plate body 124, and the two inclined portions 121 are respectively located on opposite sides of the flat portion 126. The inclined portion 121 is formed by obliquely bending and extending from both sides of the straight portion 126, and is tilted upward with respect to the straight portion 126 (refer to the direction shown in FIG. 2). The angle between the inclined portion 121 and the front surface of the casing 10 is preferably 30 to 60 degrees. As shown in FIG. 4, when the housing 10 is horizontally placed on a support 30 upward in the display area 111, the inclined portion 121 is higher than the flat portion 126 of the housing 10, so that the inclined portion 121 and the An outwardly expanding open space 31 is formed between the supports to facilitate the outward propagation of the sound transmitted from the sound hole 122.

The inclined portion 121 may be a plane or a curved surface, and the sound hole 122 is centrally disposed along the length direction of the inclined portion 121. In this embodiment, the inclined portion 121 is a flat surface, and the sound emitting holes 122 are distributed in a rectangular array. In other embodiments, the sound holes 122 may also be in other distribution forms, such as a circular array, a square array.

Referring to FIG. 5 together, the inner wall of the rear plate body 124 extends perpendicularly to each set of sound holes 122 to form an annular wall 127. The wall 127 and the rear plate body 124 form the sound cavity 123. The sound chamber 123 is substantially in the shape of a disk and includes a circular cavity and a rectangular cavity of a smaller area on one side of the circular cavity. The opening area of each set of sound holes 122 is located within the area of the housing 10 opposite to the sound chamber 123, and the aperture ratio of each set of sound holes 122 (ie, the total area of the sound hole 122 of the group and the sound hole 122) The ratio of the opening area is above 20%. Each speaker 20 is correspondingly disposed in a sound chamber 123, and the forward direction of the speaker 20 faces the area where the sound hole 122 is located on the casing 10, that is, the sound output mode of the speaker 20 is direct sounding (positive sounding). When the speaker 20 is in operation, the sound emitted by the speaker 20 is led out through the sound hole 122 and spreads obliquely outward, wherein the sound emitted by the speaker 20 passes through the sound hole 122 and the direction of the sound intensity is the largest (see FIG. 4). The middle arrow shows an acute angle with the plane of the display area 111, that is, it is not parallel or vertical.

In the portable electronic device 100, the housing 10 has a symmetrical structure, and the back inclined portions 121 are symmetrically disposed. The two sets of sound emitting holes 122 are symmetrically disposed on the housing 10 on the two inclined portions 121. The back surface of the casing 10 may also be provided with four inclined portions 121 at positions facing the four corners of the casing 10, and a set of sound holes 122 may be formed in each of the inclined portions 121, that is, the back surface of the casing 10 is provided with four The sound holes 122 are grouped. Correspondingly, a speaker 20 is disposed in the housing 10 corresponding to each set of sound holes 122.

In the portable electronic device 100, since the sound hole 122 is disposed on the back surface of the casing 10, the speaker 20 can be set to sound directly (positive sound) with respect to the sound hole 122, relative to the side sound. In the speaker of the mode, the speaker 20 has high fidelity to the medium and high frequency components (5 kHz to 20 kHz) in the sound, so that the user can enjoy the audiovisual enjoyment when listening to music or playing games.

6 to 7 show a portable electronic device 100a according to a second embodiment of the present invention, which differs from the first embodiment mainly in the structure of the rear cover 12a and the orientation in which the speaker 20a is disposed. The portable electronic device 100a has two recesses 130a respectively at positions close to the left and right sides of the rear cover 12a. The two grooves 130a are formed on the left and right sides of the flat portion 126a. The top surface of each of the grooves 130a is a plane parallel to the flat portion 126a and the display region 111a, and the side surface is a plane perpendicular to the flat portion 126a and the display region 111a. The sound hole 122a is formed on the top surface of the recess 130a and penetrates the rear cover 12a to form the sound surface 140a on the top surface of the recess 130a. The sound output surface 140a is recessed toward the display region 111a with respect to the flat portion 126a. The speaker 20a is fixed above the sound output hole 122a of the rear cover 12a so that the sound emission direction thereof faces the sound output surface 140a. Similar to the structure of the first embodiment, the speaker 20a of the present embodiment is also housed in a sound chamber formed by a wall (not shown) and a rear plate (not shown) to improve the sound emitting effect. The straight portion 126a is in contact with the support 30a via its contact surface 142a, thereby placing the portable electronic device 100a horizontally on the support 30a. When the portable electronic device 100a is placed on the support 30a, the contact surface 142a of the rear cover 12a abuts against the surface of the support 30a, and the sound output surface 140a is separated from the surface of the support 30a by the recess 130a. Thereby, the sound hole 122a is not covered by the support 30a, and the sound emitted from the speaker 20a can smoothly propagate from the groove 130a to the lateral external environment of the portable electronic device 100a.

Fig. 8 shows a portable electronic device 100b according to a third embodiment of the present invention. In order to prevent the sound from divulating in the groove 130b and affecting the sounding effect, a baffle 132b is further disposed in each of the grooves 130b in this embodiment. The baffle 132b has an arcuate configuration that is curved toward the flat portion 126b. Thereby, a concave acoustic wave reflecting structure is formed in the vicinity of each of the sound emitting holes 122b, so that the sound transmitted from the sound emitting hole 122b can be reflected by the baffle 132b toward the left and right sides of the portable electronic device 100b to improve the output sound quality. .

It can be understood that the speaker 20a in the second embodiment can also be obliquely fixed in the back cover 12a by a structure such as a bracket or a pad (not shown), and the sound hole 122a on the sound emitting surface 140a is correspondingly Tilt setting. The angle at which the speaker 20a is inclined may be the same as the angle of inclination of the speaker 20 in the first embodiment (i.e., between 30 and 60 degrees), and the direction of the tilt is also toward the outside of the electronic portable device 100a. This structure is more advantageous for the sound emitted from the sound hole 122a to propagate outward. Similarly, the third embodiment can also make the same changes.

The improvement of the external structure of the casing 10 and the adjustment of the sound holes 122, 122a of the present invention provide a means for the operator to effectively avoid sound shielding and ensure sound pressure, and the structural design can also change the speaker 20 accordingly. The sounding mode of 20a, and thus the sound effect, any partial or equivalent modification made in accordance with the present invention embodies the use of the inventive idea of the present invention and should be protected by the present invention.

In summary, the present invention complies with the requirements of the invention patent and submits a patent application according to law. The above description is only the preferred embodiment of the present invention, and equivalent modifications or variations made by those skilled in the art will be included in the following claims.

100. . . Portable electronic device

10. . . case

11. . . panel

111. . . Display area

112. . . Front plate

113. . . Side wall

12. . . Back cover

121. . . Inclined portion

122. . . Sound hole

123. . . Sound chamber

124. . . Back plate

125. . . Side wall

126. . . Straight part

127. . . Wall

20. . . speaker

30. . . Support

31. . . Open space

100a. . . Portable electronic device

111a. . . Display area

12a. . . Back cover

122a. . . Sound hole

126a. . . Straight part

130a. . . Groove

140a. . . Sound surface

142a. . . Contact surfaces

20a. . . speaker

30a. . . Support

100b. . . Portable electronic device

122b. . . Sound hole

126b. . . Straight part

130b. . . Groove

132b. . . Baffle

1 is a perspective view of a portable electronic device according to a first embodiment of the present invention.

2 is an exploded perspective view of the portable electronic device of FIG. 1.

3 is a back view of the portable electronic device of FIG. 1.

4 is a side elevational view of the portable electronic device of FIG. 1.

Figure 5 is an enlarged view of the portion V in Figure 4.

Figure 6 is a side elevational view of a portable electronic device in accordance with a second embodiment of the present invention.

Fig. 7 is an enlarged view of a portion VII of Fig. 6.

Figure 8 is a back view of a portable electronic device in accordance with a third embodiment of the present invention.

122a. . . Sound hole

130a. . . Groove

140a. . . Sound surface

142a. . . Contact surfaces

20a. . . speaker

Claims (10)

A portable electronic device includes a housing having a display area on the front side, a sound hole on the back side, and a speaker corresponding to the sound hole inside the housing, the improvement being that the back side of the housing includes contact with the support. And a sound emitting surface of the sound hole, the sound emitting surface is recessed toward the display area with respect to the contact surface, and a groove is formed on the back surface of the casing, the groove is open to the side of the portable electronic device, and the sound emitted by the speaker passes through the sound hole and The groove propagates outward. The portable electronic device of claim 1, wherein the sound emission direction of the speaker is perpendicular to the contact surface. The portable electronic device of claim 1, wherein the sound emitting surface is parallel to the contact surface. The portable electronic device of claim 1, wherein the sound emission direction of the speaker is inclined outward with respect to the contact surface. The portable electronic device of claim 1, wherein the sound hole extends in the same direction as the sound emission direction of the speaker. The portable electronic device of claim 1, wherein the housing forms a baffle partially surrounding the sound hole in the recess. The portable electronic device of claim 6, wherein the baffle has an arc curved toward the contact surface. The portable electronic device of claim 1, further comprising a sound chamber disposed inside the casing, the speaker being received in the sound cavity. The portable electronic device of claim 8, further comprising a wall formed on the casing, the sound chamber being surrounded by the wall. The portable electronic device of claim 1, wherein the number of sound holes is plural and distributed in a matrix on the sound emitting surface.