Electronic device

Abstract

The present application provides an electronic device. The electronic device comprises an outer box, a circular frame and a display. One side of the outer box is provided with a panel, the panel is provided with a circular opening, and the inner edge of the circular opening is provided with a first fixing structure. The circular frame is rotatably arranged in the circular opening and closes the circular opening, and the outer edge of the circular frame is provided with a second fixing structure which is buckled with the first fixing structure. The display is embedded in the circular frame and exposed on the panel, so that the display can be rotated according to different placement modes of the outer box.

Description

Technical Field

[0001] This invention relates to electronic devices, and more particularly to an electronic device capable of rotating its display according to its different orientations. Background Technology

[0002] Modern small and medium-sized electronic devices, such as uninterruptible power supplies, power strips, routers, network base stations, set-top boxes, and mini-computer hosts, are mostly flat rectangular in shape. They can be placed horizontally or vertically depending on the available space. Some of these devices have displays to show status information and can also be used with an interface for operation. However, the display screen cannot rotate with the orientation of the device. Therefore, to accommodate different device orientations, most electronic devices use square displays, which can be installed according to the device's orientation. However, disassembling the display is inconvenient, and the holes at the mounting point could expose internal circuitry, posing a risk of electric shock. Furthermore, safety regulations make the design more complex and costly.

[0003] In view of this, the inventor has devoted himself to researching and applying theoretical principles to address the aforementioned problems in the prior art, which is the target of the inventor's improvement. Summary of the Invention

[0004] The purpose of this invention is to provide an electronic device that can rotate the display on the display according to its different placement without disassembling the display.

[0005] This invention provides an electronic device comprising an outer casing, a circular frame, and a display. The outer casing has a panel on one side and multiple side panels adjacent to the periphery of the panel. The panel has a circular opening, and the inner edge of the opening has a first fixing structure. The circular frame is rotatably disposed within the circular opening and closes the opening. The outer edge of the circular frame has a second fixing structure, which slides with the circular frame and is constrained by the first fixing structure. The display is embedded in the circular frame and protrudes from the panel. The outer casing can be placed with one of its side panels as the bottom, each side panel corresponding to a different placement position, and the circular frame can be rotated to orient the display to any of these placement positions.

[0006] The electronic device of the present invention has a circular frame protruding from the panel. An operating interface is provided on the circular frame. The outer box is rectangular and the panel is rectangular.

[0007] The electronic device of the present invention has a first fixing structure comprising a barbed tenon, and a second fixing structure comprising an arcuate groove concentrically arranged with a circular frame, wherein the barbed tenon engages with the arcuate groove. Alternatively, the second fixing structure comprises a barbed tenon, and the first fixing structure comprises an arcuate groove concentrically arranged with a circular opening, wherein the barbed tenon engages with the arcuate groove. Or, the first fixing structure comprises a barbed tenon, and the second fixing structure correspondingly comprises an arcuate groove concentrically arranged with the circular frame; the second fixing structure comprises another barbed tenon, and the first fixing structure correspondingly comprises another arcuate groove concentrically arranged with the circular opening, wherein each barbed tenon engages with its corresponding arcuate groove.

[0008] The electronic device of the present invention has a first positioning structure at the inner edge of a circular opening and a second positioning structure at the outer edge of a circular frame. The circular frame is rotatable relative to the circular opening to one of a plurality of predetermined positions corresponding to a plurality of placement positions. When the circular frame is in any predetermined position, the first positioning structure and the second positioning structure stop each other along the circumference of the circular opening. When the circular frame is in one of the predetermined positions, the first positioning structure and the second positioning structure are engaged with each other along the circumference of the circular opening. When the circular frame is in any predetermined position, the first positioning structure and the second positioning structure are engaged with each other in a direction parallel to the central axis of the circular opening. The first positioning structure includes a spherical tenon, and the second positioning structure includes a positioning hole for engaging the spherical tenon; or the second positioning structure includes a spherical tenon, and the first positioning structure includes a positioning hole for engaging the spherical tenon.

[0009] The electronic device of the present invention has a circular frame that can be rotated by a multiple of 90 degrees from any predetermined position to reach another predetermined position.

[0010] The electronic device of the present invention includes a first positioning structure and a second positioning structure, each comprising a stop block. When the circular frame is located in one of the predetermined positions, the pair of stop blocks abut against each other and unidirectionally stop each other in the circumferential direction of the circular opening.

[0011] The electronic device of the present invention has a display that is rotatably mounted in a circular opening on an outer box via a circular frame, so that the display can be rotated according to different arrangements of the outer box for user convenience. Attached Figure Description

[0012] Figure 1 This is a perspective view of the electronic device of the first embodiment of the present invention located in one of the placement positions.

[0013] Figure 2 and Figure 3 This is an exploded perspective view of the electronic device according to the first embodiment of the present invention.

[0014] Figure 4 This is a schematic diagram of the circular frame located at a predetermined position in the first embodiment of the present invention.

[0015] Figure 5 This is a schematic diagram of the circular frame located at another predetermined position in the first embodiment of the present invention.

[0016] Figure 6 This is a perspective view of the electronic device of the first embodiment of the present invention located in another placement position.

[0017] Figure 7 and Figure 8 This is an exploded perspective view of the electronic device according to the second embodiment of the present invention.

[0018] Figure 9 This is a schematic diagram of the circular frame located at a predetermined position in the second embodiment of the present invention.

[0019] Figure 10 This is a schematic diagram of the circular frame located at another predetermined position in the second embodiment of the present invention.

[0020] Figure 11 and Figure 12 This is an exploded perspective view of the electronic device according to the third embodiment of the present invention.

[0021] Figure 13 This is a schematic diagram of the circular frame located at a predetermined position in the third embodiment of the present invention.

[0022] Figure 14 This is a schematic diagram of the circular frame located at another predetermined position in the third embodiment of the present invention.

[0023] The attached figures are labeled as follows:

[0024] 100: Outer box

[0025] 101: Round opening

[0026] 110: Panel

[0027] 111, 112, 113, 114: Side panels

[0028] 120: First fixed structure

[0029] 121: Arc groove

[0030] 122: Undercut sliding tenon

[0031] 130: First positioning structure

[0032] 131: Spherical tenon

[0033] 132: Stop

[0034] 133: Slot

[0035] 133a: Neck opening

[0036] 200: Circular frame

[0037] 220: Second fixed structure

[0038] 221: Undercut sliding tenon

[0039] 222: Arc groove

[0040] 230: Second positioning structure

[0041] 231: Positioning hole

[0042] 232: Stop

[0043] 233: Cylinder

[0044] 301: Sub-circuit board

[0045] 310: Monitor

[0046] 320: Electrical connector

[0047] 330: User Interface Detailed Implementation

[0048] See Figures 1 to 6 The first embodiment of the present invention provides an electronic device comprising an outer casing 100, a circular frame 200 and a display 310.

[0049] The outer box 100 is rectangular, and one side of the outer box 100 has a panel 110, which is also rectangular. The outer box 100 has multiple side panels 111 / 112 adjacent to the panel 100, and the outer box 100 can be placed in one of the corresponding placement positions using one of the side panels 111 / 112. In this embodiment, the outer box 100 has two side panels 111 / 112 that can serve as the bottom, corresponding to two placement positions respectively. Therefore, the outer box 100 can be placed as follows: Figure 1 As shown, it is placed flat in the first placement position with the first side panel 111 as the base, and the outer box 100 can also be placed as follows. Figure 6 The second side panel 112 is used as the base and is placed in the second placement position. The panel 110 has a circular opening 101, and the inner edge of the circular opening 101 has a first fixing structure 120.

[0050] See Figures 2 to 4The circular frame 200 can be a ring, a disk, or a cylinder. The outer contour of the circular frame 200 matches the inner contour of the circular opening 101. The circular frame 200 is rotatably disposed within the circular opening 101 and closes the circular opening 101. In this embodiment, the circular frame 200 preferably protrudes from the panel 110 to facilitate the user's rotation of the circular frame 200. However, the present invention is not limited to this. For example, the circular frame 200 can also be flush with the panel 110 or recessed within the circular opening 101. A second fixing structure 220 is provided on the outer edge of the circular frame 200. The second fixing structure 220 corresponds to the first fixing structure 120 and is distributed in a ring around the outer periphery of the circular frame 200. The second fixing structure 220 slides along with the circular frame 200 and is confined within the first fixing structure 120, thereby confining the circular frame 200 to the circular opening 101 of the panel 110 of the outer box 100. Moreover, the circular frame 200 can rotate relative to the circular opening 101 by sliding relative to the first fixing structure 120 along the circumferential direction through the second fixing structure 220 on the periphery of the circular frame 200. In this embodiment, the second fixing structure 220 corresponds to the first fixing structure 120 and is distributed in a ring around the outer periphery of the circular frame 200 to form a circular outline, but the present invention is not limited thereto.

[0051] The specific construction of the first fixing structure 120 and the second fixing structure 220 is described in detail below. In this embodiment, the first fixing structure 120 includes a barbed sliding tenon 122, and the second fixing structure 220 includes an arc groove 222 concentrically arranged with the circular frame 200, and the barbed sliding tenon 122 is engaged in the arc groove 222. When the circular frame 200 rotates within the circular opening 101, the barbed sliding tenon 122 can slide within the arc groove 222 without interfering with the rotation of the circular frame 200.

[0052] See Figures 1 to 2 The display 310 is embedded in the circular frame 200 and exposed on the panel 110. Preferably, the display 310 is electrically connected to the motherboard (not shown) of the electronic device via an electrical connector 320 for connecting a ribbon cable (not shown) to display relevant information about the electronic device's status. Furthermore, an operating interface 330, electrically connected to the motherboard, is provided on the circular frame 200 for user operation of the electronic device. The display 310, electrical connector 320, and operating interface 330 are preferably disposed on the same sub-circuit board 301. This invention does not limit the form of the operating interface 330; for example, the operating interface 330 may be a physical button or a touch interface integrated into the display 310.

[0053] See Figures 2 to 4To limit the rotation of the circular frame 200, a first positioning structure 130 is provided on the inner edge of the circular opening 101, and a second positioning structure 230 is provided on the outer edge of the circular frame 200. The circular frame 200 can rotate relative to the circular opening 101 to one of a plurality of predetermined positions, and the circular frame 200 preferably rotates from any predetermined position by a multiple of 90 degrees to reach another predetermined position. When the circular frame 200 is in any predetermined position, the first positioning structure 130 and the second positioning structure 230 can both stop each other along the circumference of the circular opening 101 to prevent the circular frame 200 from shifting unexpectedly.

[0054] The first positioning structure 130 and the second positioning structure 230 restrict the circular frame 200 relative to the circular opening 101 as follows: Figures 1 to 4 The first predetermined position shown and as Figures 5 to 6 Rotate between the second predetermined positions shown. (As shown) Figure 1 As shown, when the outer box 100 is placed horizontally with the first side panel 111 as its bottom, the circular frame 200 can be rotated to the corresponding first predetermined position, allowing the operator to view the display 310 directly; and as shown Figure 6 As shown, when the outer box 100 is in an upright position with the bottom set by the second side plate 112, the circular frame 200 can be rotated to a second predetermined position so that the operator can look directly at the display 310.

[0055] When the outer box 100 rotates between multiple flat and upright placement positions, its rotation angle is a multiple of 90 degrees. In the aforementioned embodiment, the two side panels 111 / 112 are adjacent and perpendicular to each other, and the rotation angle between the two predetermined positions that the circular frame 200 can rotate to is 90 degrees. However, the present invention does not limit the rotation angle between the predetermined positions. For example, the outer box 100 may also select two parallel side panels 111 / 113 (or 112 / 114) as the bottom, and the rotation angle between the two predetermined positions that the circular frame 200 can rotate to is configured to be 180 degrees. Furthermore, the present invention does not limit the number of predetermined positions. For example, the outer box 100 may also select three consecutive adjacent side panels 111 / 112 / 113 as the bottom, and the rotation angle between the three corresponding predetermined positions that the circular frame 200 can rotate to is configured to be 90 degrees.

[0056] The electronic device of the present invention may include a first positioning structure 130 and a second positioning structure 230, each of which may include a stop block 132 / 232. When the circular frame 200 is located at a predetermined position at the end of its rotation stroke, the stop blocks 132 / 232 abut against each other and unidirectionally stop each other in the circumferential direction of the circular opening 101 to prevent the circular frame 200 from rotating out of its predetermined stroke, causing the ribbon cable to be excessively twisted and damaged.

[0057] Furthermore, the first positioning structure 130 may include a spherical tenon 131, and the second positioning structure 230 includes a positioning hole 231 for engaging the spherical tenon 131. When the circular frame 200 is at any predetermined position within its rotational stroke, the first positioning structure 130 and the second positioning structure 230 position the circular frame 200 by engaging the spherical tenon 131 in a direction parallel to the central axis of the circular opening 101 through the positioning hole 231, thus preventing unintended rotation. The aforementioned spherical tenon 131 and positioning hole 231 are interchangeable, i.e., the second positioning structure 230 includes the spherical tenon 131, and the first positioning structure 130 includes the positioning hole 231 for engaging the spherical tenon 131. Depending on the configuration of the predetermined positions, multiple mating spherical tenons 131 or multiple positioning holes 231 can be provided. The function of the ball tenon 131 is that when the user applies sufficient rotational force to the round frame 200, the ball tenon 131 can slide out from the positioning hole 231 to allow the round frame 200 to rotate.

[0058] A second embodiment of the present invention provides an electronic device that is substantially the same as the first embodiment. Figure 1 As shown, it includes an outer box 100, a circular frame 200 and a display 310.

[0059] The outer box 100 is rectangular, and a panel 110 is provided on one side of the outer box 100. The panel 110 is rectangular. A circular opening 101 is provided on the panel 110, and a first fixing structure 120 is provided on the inner edge of the circular opening 101.

[0060] See Figures 7 to 9 The circular frame 200 can be a ring, a disk, or a cylinder. The outer contour of the circular frame 200 matches the inner contour of the circular opening 101. The circular frame 200 is rotatably disposed within the circular opening 101 and closes the circular opening 101. In this embodiment, the circular frame 200 preferably protrudes from the panel 110 to facilitate user rotation of the circular frame 200, but the invention is not limited thereto. For example, the circular frame 200 can also be flush with the panel 110 or recessed into the circular opening 101. A second fixing structure 220 is provided on the outer edge of the circular frame 200. The second fixing structure 220 engages with the first fixing structure 120 to fix the circular frame 200 to the outer box 100.

[0061] The specific construction of the first fixing structure 120 and the second fixing structure 220 is described in detail below. In this embodiment, the first fixing structure 120 includes a barbed tenon 122; the second fixing structure 220 correspondingly includes an arc groove 222 arranged concentrically with the circular frame 200. The second fixing structure 220 also includes a barbed tenon 221, which in this embodiment extends in an arc shape; the first fixing structure 120 also correspondingly includes an arc groove 121 arranged concentrically with the circular opening 101. Each barbed tenon 122 / 221 engages with the corresponding arc groove 222 / 121 to fix the circular frame 200 to the outer box 100. When the circular frame 200 rotates within the circular opening 101, each barbed tenon 122 / 221 can slide within the corresponding arc groove 222 / 121 without interfering with the rotation of the circular frame 200.

[0062] The display 310 is embedded in the circular frame 200 and exposed on the panel 110. Preferably, the display 310 is electrically connected to the motherboard of the electronic device via a connector 320 to display relevant information about the electronic device's status. Furthermore, an operating interface 330, electrically connected to the motherboard, is provided on the circular frame 200 for user operation of the electronic device. The display 310, connector 320, and operating interface 330 are preferably arranged in a... Figure 1 On the sub-circuit board 301. The present invention does not limit the form of the operation interface 330. For example, the operation interface 330 may be a physical button or a touch interface integrated into the display 310.

[0063] To limit the rotation of the circular frame 200, a first positioning structure 130 is provided on the inner edge of the circular opening 101, and a second positioning structure 230 is provided on the outer edge of the circular frame 200. Depending on the placement position of the outer box 100, the circular frame 200 can rotate relative to the circular opening 101 to one of a plurality of predetermined positions, and preferably, the circular frame 200 can rotate from any predetermined position by a multiple of 90 degrees to reach another predetermined position. In this embodiment, one of the predetermined positions is as follows: Figures 7 to 9 As shown, another predetermined location is as follows: Figure 10 As shown. See also Figure 9 and Figure 10 When the circular frame 200 is in any predetermined position, the first positioning structure 130 and the second positioning structure 230 can both stop each other along the circumference of the circular opening 101 to prevent the circular frame 200 from shifting unexpectedly.

[0064] See Figure 9 and Figure 10The electronic device of the present invention may include a first positioning structure 130 and a second positioning structure 230, which may each include a stop block 132 / 232. When the circular frame 200 is located at a predetermined position at the end of the rotation stroke, the stop blocks 132 / 232 abut against each other and unidirectionally stop each other in the circumference of the circular opening 101 to prevent the circular frame 200 from rotating out of its predetermined stroke, causing the ribbon cable to be excessively twisted and damaged.

[0065] Furthermore, the first positioning structure 130 may include a spherical tenon 131, and the second positioning structure 230 includes a positioning hole 231 for engaging the spherical tenon 131. When the circular frame 200 is at any predetermined position within its rotational stroke, the first positioning structure 130 and the second positioning structure 230 position the circular frame 200 by engaging the spherical tenon 131 in a direction parallel to the central axis of the circular opening 101 through the positioning hole 231, thus preventing unintended rotation. The aforementioned spherical tenon 131 and positioning hole 231 are interchangeable, i.e., the second positioning structure 230 includes the spherical tenon 131, and the first positioning structure 130 includes the positioning hole 231 for engaging the spherical tenon 131. Depending on the configuration of the predetermined positions, multiple mating spherical tenons 131 or multiple positioning holes 231 can be provided. The function of the ball tenon 131 is that when the user applies sufficient rotational force to the round frame 200, the ball tenon 131 has an arc surface and can slide out from the positioning hole 231 it engages with to allow the round frame 200 to rotate.

[0066] A third embodiment of the present invention provides an electronic device that is largely the same as the first embodiment. Figure 1 As shown, it includes an outer box 100, a circular frame 200 and a display 310.

[0067] See Figures 11 to 14 The outer box 100 is rectangular, and a panel 110 is provided on one side of the outer box 100. The panel 110 is rectangular. A circular opening 101 is provided on the panel 110, and a first fixing structure 120 is provided on the inner edge of the circular opening 101.

[0068] The circular frame 200 can be a ring, a disk, or a cylinder. The outer contour of the circular frame 200 matches the inner contour of the circular opening 101. The circular frame 200 is rotatably disposed within the circular opening 101 and closes the circular opening 101. In this embodiment, the circular frame 200 preferably protrudes from the panel 110 to facilitate user rotation of the circular frame 200, but the invention is not limited thereto. For example, the circular frame 200 can also be flush with the panel 110 or recessed into the circular opening 101. A second fixing structure 220 is provided on the outer edge of the circular frame 200. The second fixing structure 220 engages with the first fixing structure 120 to fix the circular frame 200 to the outer box 100.

[0069] The specific construction of the first fixing structure 120 and the second fixing structure 220 is described in detail below. In this embodiment, the second fixing structure 220 includes a barbed sliding tenon 221, and the first fixing structure 120 includes an arc groove 121 concentrically arranged with the circular opening 101. The barbed sliding tenon 221 engages with the corresponding arc groove 121 to fix the circular frame 200 to the outer box 100. When the circular frame 200 rotates within the circular opening 101, the barbed sliding tenon 221 can slide within the corresponding arc groove 121 without interfering with the rotation of the circular frame 200.

[0070] The display 310 is embedded in the circular frame 200 and exposed on the panel 110. Preferably, the display 310 is electrically connected to the motherboard of the electronic device via a connector 320 to display relevant information about the electronic device's status. Furthermore, an operating interface 330, electrically connected to the motherboard, is provided on the circular frame 200 for user operation of the electronic device. The display 310, connector 320, and operating interface 330 are preferably arranged in a... Figure 1 On the sub-circuit board 301. The present invention does not limit the form of the operation interface 330. For example, the operation interface 330 may be a physical button or a touch interface integrated into the display 310.

[0071] To limit the rotation of the circular frame 200, a first positioning structure 130 is provided on the inner edge of the circular opening 101, and a second positioning structure 230 is provided on the outer edge of the circular frame 200. The circular frame 200 can rotate relative to the circular opening 101 to one of a plurality of predetermined positions, and the circular frame 200 preferably rotates from any predetermined position by a multiple of 90 degrees to reach another predetermined position. When the circular frame 200 is in any predetermined position, the first positioning structure 130 and the second positioning structure 230 can both stop each other along the circumference of the circular opening 101 to prevent the circular frame 200 from shifting unexpectedly.

[0072] In this embodiment, the two ends of the rotation stroke of the circular frame 200 each have a predetermined position. When the circular frame 200 is in either predetermined position, the first positioning structure 130 and the second positioning structure 230 can be interlocked with each other along the circumference of the circular opening 101. In this embodiment, the second fixing structure 220 and the second positioning structure 230 are jointly disposed on the same rod extending from the circular frame 200. The barbed tenon 221 of the second fixing structure 220 is disposed at the end of the rod. The barbed tenon 221 is preferably spherical to facilitate interlocking with the arc groove 121. Specifically, the first positioning structure 130 includes a latching groove 133, and each latching groove 133 has at least one neck opening 133a. In this embodiment, the corresponding... Figure 13 and Figure 14Two pre-defined positions are provided with two fastening slots 133. The two fastening slots 133 are connected to the two ends of the arcuate groove 121 through neck openings 133a. The second positioning structure 230 includes a cylinder 233 passing through the arcuate groove 121 and used to engage with the fastening slots 133. The cylinder 233 is formed in the middle section of the rod and can move along the arcuate groove 121 as the circular frame 200 rotates. When the circular frame 200 is in any pre-defined position, the cylinder 233 can be forced into the neck opening 133a of the corresponding fastening slot 133 and locked in the fastening slot 133 to position the circular frame 200. When the user applies sufficient rotational force to the circular frame 200, the cylinder 233, having an arc surface, can slide out of the fastening slot 133 it engages with, allowing the circular frame 200 to rotate. In this example, a retaining groove 133 can also be added to the middle section of the arc groove 121, and the included angle between adjacent retaining grooves 133 and the center of the circular opening 101 can be a multiple of 90 degrees.

[0073] The electronic device of the present invention has a display 310 rotatably mounted in a circular opening 101 on an outer casing 100 via a circular frame 200. Therefore, the display 310 can be rotated according to different arrangements of the outer casing 100 for user convenience. The electronic device of the present invention allows the display 310 to be rotated without disassembling it, thus preventing the user from contacting exposed parts and potentially getting an electric shock. Furthermore, the display 310 does not need to be square.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Other equivalent variations that utilize the patent spirit of the present invention should all fall within the patent scope of the present invention.

Claims

1. An electronic device comprising: An outer box, one side of which has a panel and a plurality of side panels adjacent to the periphery of the panel, the panel having a circular opening and a first fixing structure on the inner edge of the circular opening; A circular frame is rotatably disposed within a circular opening and closes the opening. A second fixing structure is provided on the outer edge of the circular frame. This second fixing structure slides with the circular frame and is constrained by the first fixing structure. A display, embedded in the circular frame and protruding from the panel, The outer box can be placed with one of the multiple side panels as its bottom, each side panel as its bottom corresponds to a placement position, and the circular frame can be rotated so that the orientation of the display corresponds to any of the placement positions. The inner edge of the circular opening is provided with a first positioning structure, and the outer edge of the circular frame is provided with a second positioning structure. The circular frame can be rotated relative to the circular opening to one of a plurality of predetermined positions corresponding to the plurality of placement positions. When the circular frame is in any of the predetermined positions, the first positioning structure and the second positioning structure stop each other along the circumference of the circular opening. The first positioning structure and the second positioning structure each include a stop block. When the circular frame is located in one of the predetermined positions, the two stop blocks abut against each other and unidirectionally stop each other in the circumferential direction of the circular opening.

2. The electronic device of claim 1, wherein the circular frame protrudes from the panel.

3. The electronic device as claimed in claim 1, wherein an operation interface is provided on the circular frame.

4. The electronic device of claim 1, wherein the outer casing is rectangular and the panel is rectangular.

5. The electronic device of claim 1, wherein the first fixing structure includes a barbed tenon, the second fixing structure includes an arc groove concentrically arranged with the circular frame, and the barbed tenon engages with the arc groove.

6. The electronic device of claim 1, wherein the second fixing structure includes a barbed tenon, the first fixing structure includes an arc groove concentrically arranged with the circular opening, and the barbed tenon engages with the arc groove.

7. The electronic device of claim 1, wherein the first fixing structure includes a barbed tenon and the second fixing structure correspondingly includes an arc groove arranged concentrically with the circular frame, the second fixing structure includes another barbed tenon and the first fixing structure correspondingly includes another arc groove arranged concentrically with the circular opening, and each barbed tenon respectively engages with the corresponding arc groove.

8. The electronic device of claim 1, wherein when the circular frame is located in one of the predetermined positions, the first positioning structure and the second positioning structure are engaged with each other circumferentially along the opening of the circle.

9. The electronic device of claim 1, wherein when the circular frame is located at any of the predetermined positions, the first positioning structure and the second positioning structure are engaged with each other in a direction parallel to the central axis of the circular opening.

10. The electronic device of claim 9, wherein the first positioning structure includes a spherical tenon, and the second positioning structure includes a positioning hole for engaging the spherical tenon.

11. The electronic device of claim 9, wherein the second positioning structure includes a spherical tenon, and the first positioning structure includes a positioning hole for engaging the spherical tenon.

12. The electronic device of claim 1, wherein the circular frame is capable of rotating from any of the predetermined positions by a multiple of 90 degrees to another predetermined position.

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