TWI488567B - Casing structure and electronic device - Google Patents

Description

Chassis structure and electronic device

The present invention relates to a casing structure and an electronic device, and more particularly to a casing structure and an electronic device in which a built-in plate body and a casing are substantially free of gaps.

Most of the conventional electronic devices are provided with a standoff on the bottom plate for carrying and fixing the motherboard. However, since the fixing seat is riveted to the bottom plate, the fixing and dismounting of the fixing seat is not easy.

Therefore, some manufacturers have improved the problem that the fixing base is not easy to assemble and disassemble. As shown in Fig. 1, a gap G is left between the outer casing 1a and the bottom plate 2a to design the fixing base 3a to be screwed to the bottom plate 2a. However, this structure makes it impossible to further reduce the thickness of the electronic device because a gap G is required between the outer casing 1a and the bottom plate 2a.

Therefore, the present inventors have felt that the above-mentioned deficiencies can be improved, and they have devoted themselves to research and cooperated with the application of the theory, and finally proposed a present invention which is reasonable in design and effective in improving the above-mentioned defects.

An embodiment of the present invention provides a chassis structure and an electronic device, which are mainly designed through the structure of the bottom plate, so that the support unit can be quickly disassembled and assembled under the premise that the inner plate body and the outer casing are substantially free of gaps. Base plate.

An embodiment of the present invention provides a casing structure, including: a casing; a bottom plate disposed in the casing, and the bottom plate includes: a built-in plate body having an opposite first plate surface and a second plate surface The first plate surface of the inner plate body abuts against the inner edge of the outer casing substantially without a gap; a spring arm, In order to gradually move away from the inclined extension of the inner plate body and the outer casing, the elastic arm is connected at one end to the inner plate body, and the other end of the elastic arm is elastically displaced and defined as a free end, the free end and the inner plate a distance between the planes in which the body is located; and a stop body coupled to the inner plate body, the stop body being disposed at a position relative to the elastic arm; and a support unit including a substantially a frame-shaped positioning body and a top abutting body, and the positioning body has a positioning portion and a connecting portion, the top abutting body is formed to extend from the connecting portion of the positioning body; wherein the first part of the inner plate body In the two planes, the blocking body and the free end of the elastic arm enclose a defining space, and the outer contour shape and size of the positioning body of the supporting unit are opposite to the limiting space.

Another electronic device includes a casing structure and a power supply. The casing structure includes: a casing; a bottom plate disposed in the casing, and the bottom plate comprises: a built-in plate body, Having a first plate surface and a second plate surface, the first plate surface of the inner plate body abuts the inner edge of the outer casing substantially without a gap; and an outer plate body substantially opposite to the inner plate body Vertically intersecting, and the external board body is formed with a power hole; a spring arm is gradually extended away from the inner plate body and the outer casing, and the elastic arm is connected at one end to the inner plate body, and the other end of the elastic arm Capable of being elastically displaced and defined as a free end having a distance from a plane in which the inner plate body is located; and a stop body connected to the inner plate body, and the stop body is disposed at And a supporting unit comprising a substantially frame-shaped positioning body and a topping body, and the positioning body has a positioning portion and a connecting portion, the topping body is self-aligned The connecting portion of the body is extended; wherein In the second plate surface of the inner plate, the stopper body and the free end of the elastic arm jointly define a limiting space surrounded The outer contour shape and size of the positioning unit of the supporting unit are opposite to the limiting space; the power supply device is disposed in the power supply hole of the external board body and located in the outer casing, and the elastic arm and the blocking body The position is adjacent to the area where the power supply is projected onto the built-in board.

In summary, the casing structure and the electronic device provided by the embodiments of the present invention have a resilient arm and a blocking body formed through the bottom plate, so that the supporting plate body and the outer casing have substantially no gap contact, and the support is supported. The unit can be quickly mounted to or detached from the bottom plate by pressing against the spring arm.

The detailed description of the present invention and the accompanying drawings are to be understood by the claims The scope is subject to any restrictions.

[First Embodiment]

Please refer to FIG. 2, which is a first embodiment of the present invention. The present invention is an electronic device 100, which may be, for example, a host computer. The electronic device 100 includes a casing structure, a power supply, and a motherboard. The power supply 2 and the motherboard 3 are mounted in the casing structure 1.

It should be noted that the electronic device 100 further includes other components, such as a hard disk drive, a CD player, or a transmission cable. However, since the improvement of the present invention is more related to the above-described casing structure 1, the power supply 2, and the motherboard 3, other components will not be described herein.

The casing structure 1 includes a casing 11 , a bottom plate 12 and a supporting unit 13 . The bottom plate 12 is disposed in the casing 11 , and the supporting unit 13 is detachably mounted on the bottom plate 12 .

Specifically, the bottom plate 12 includes an inner plate body 121, an outer plate body 122, a spring arm 123, and a three-stop body 124. In the embodiment, the built-in board body 121, the external board body 122, the elastic arm 123, and the positioning bodies 131 are integrally formed by bending and bending, but other methods (such as welding) are not excluded. Connect the above components.

In addition, the external board body 122 can also be separated from the built-in board body 121, that is, the external board body 122 and the built-in board body 121 substantially perpendicularly intersect, but are not connected. That is to say, in practical applications, the external board 122 can also be designed as a part of the housing 11 or as a separate component.

The outer plate body 122 is bent and extended from the end edge of the inner plate body 121 in a substantially vertical shape, and the outer plate body 122 is formed with a power hole 1221. The outer shape of the power supply hole 1221 substantially corresponds to the cross section of the power supply 2.

Therefore, the power supply device 2 is disposed in the power supply hole 1221 of the external board body 122 to be located in the outer casing 11, and the power supply device 2 is locked to the external board body 122 by screws.

Furthermore, the position of the elastic arm 123 and the blocking body 124 is adjacent to the area where the power supply 2 is projected onto the inner plate 121. Further, the elastic arm 123 and the blocking body 124 are substantially at the power source. The supplier 2 is remote from the outer plate body 122 and adjacent to the inner corner of the bottom plate 12.

It should be noted that, in this embodiment, the casing structure 1 is described by a group of elastic arms 123 and a blocking body 124 adjacent to the power supply 2, but in practical applications, other parts of the bottom plate 12 may also be used. A plurality of sets of matching elastic arms 123 and blocking bodies 124 are formed, which are not limited herein. Similarly, the support unit 13 can be arranged in multiple groups (as shown in FIG. 3).

In more detail, referring to FIG. 4 to FIG. 6 , the built-in board body 121 is The flat plate has a first plate surface 1211 and a second plate surface 1212 opposite to each other, and the first plate surface 1211 of the inner plate body 121 abuts against the inner edge of the outer casing 11 substantially without a gap.

Furthermore, the elastic arm 123 has a long strip shape and is gradually inclined away from the inner plate body 121 and the outer casing 11. The elastic arm 123 is connected to the inner plate body 121 at one end, and the other end of the elastic arm 123 is elastically displaced. It is defined as a free end 1231, and the free end 1231 has a distance from the plane in which the built-in board body 121 is located (eg, the second board surface 1212). The length of the elastic arm 123 can be adjusted according to different elastic force requirements or according to the type of the installed model.

Each of the blocking bodies 124 has a substantially L-shaped cross section and has a lateral stopping portion 1241 and a longitudinal stopping portion 1242. One end of the lateral stopper portion 1241 is substantially perpendicularly connected to the inner plate body 121, and the other end of the lateral stopper portion 1241 is substantially perpendicularly connected to the longitudinal stopper portion 1242. The longitudinal stop portion 1242 and the inner plate body 121 have a height difference and are substantially parallel to each other.

The three blocking bodies 124 are disposed at positions relative to the elastic arms 123. Further, the two blocking bodies 124 are substantially located on opposite sides of the extending direction of the elastic arms 123, and the longitudinal stops of the two blocking bodies 124 are provided. The end edges of the stopping portions 1242 face each other; and the other blocking body 124 of the three blocking bodies 124 are located substantially in the extending direction of the elastic arm 123, and the end edge of the longitudinal blocking portion 1242 of the blocking body 124 faces the The arm 123.

Furthermore, in the second plate surface 1212 of the built-in plate body 121, the inner edge of the blocking body 124 and the end edge of the free end 1231 of the elastic arm 123 together define a limiting space 125.

It should be noted that, in this embodiment, the three blocking bodies 124 are lifted. For example, in actual application, the position or shape of the stopper body 124 may be adjusted to reduce the number of formations of the stopper body 124. For example, the bottom plate 12 may only form one stop body 124, which is designed to be substantially U-shaped, and the U-shaped stop body 124 is notched toward the elastic arm 123 (see FIG. 8). Alternatively, only the opposite end corner portions of the U-shaped stopper body 124 are left, so that the bottom plate 12 forms two stoppers 124 (see FIG. 9).

The supporting unit 13 is adapted to press the elastic arm 123 to displace the free end 1231 of the elastic arm 123 toward the outer casing 11 , thereby enabling the supporting unit 13 to be detached to the bottom plate 12 along the second plate surface 1212 of the inner plate 121 . The stop body 124 and the free end 1231 of the elastic arm 123.

Specifically, the support unit 13 includes a support member 13a and a fixing member 13b (as shown in FIG. 7). In the embodiment, the support member 13a is a structure formed by integrally punching and bending. In the embodiment, the fixing member 13b is exemplified by a screw, but the fixing member 13b may be replaced by other components having a fixing function, such as an R-type pin.

The support member 13a has a substantially frame-shaped positioning body 131, a top abutting body 132 and a supporting body 133. The positioning body 131 is substantially annular and has an outer contour and a size opposite to the limiting space 125. The positioning body 131 has a positioning portion 1311 and a connecting portion 1312 which are integrally connected, that is, the positioning portion 1311 is substantially U. The connecting portion 1312 has an elongated shape and is connected to opposite end edges of the U-shaped positioning portion 1311.

The top body 132 has a substantially L-shaped cross section and has a top abutting portion 1321 and a limiting portion 1322. The abutting portion 1321 is formed by bending and extending perpendicularly from the outer edge of the connecting portion 1312 of the positioning body 131, and is continuously bent and extended to form the limiting portion 1322. The limiting portion 1322 and the positioning body 131 have a height difference and are substantially parallel to each other, and the end edge of the limiting portion 1322 It faces in a direction away from the positioning portion 1311. In more detail, the abutting portion 1321 is vertically extended by the positioning body 131 by a predetermined height. In the embodiment, the predetermined height corresponds to the plane of the limiting portion 1322 and the built-in plate body 121 (eg, the second plate surface 1212). )the distance between. The predetermined height is slightly larger than the distance between the free end 1231 of the elastic arm 123 and the inner plate 121 to allow the top abutting body 132 to abut against the free end 1231 of the elastic arm 123.

The support body 133 is formed from the annular inner edge of the positioning body 131 and has a bearing portion 1331 and a supporting portion 1332. Further, the supporting portion 1332 has a two-piece structure and connects the annular inner edge of the positioning body 131 and The opposite ends of the carrying portion 1331 are such that the relative positions of the carrying portion 1331 and the positioning body 131 remain unchanged. Furthermore, the bearing portion 1331 can be formed inwardly at a substantially central portion thereof with a through hole 1334 (for example, a screw hole) corresponding to the fixing member 13b.

When the supporting member 13a is to be mounted on the bottom plate 12, the elastic arm 123 is first pressed by the positioning body 131, so that the elastic arm 123 is substantially coplanar with the second plate surface 1212, so that the positioning body 131 is located on the second plate surface 1212, and then The positioning portion 1311 of the positioning body 131 is moved toward the stopper body 124 and further abuts against the inner edge of the stopper body 124. While the positioning portion 1311 abuts against all the blocking bodies 124, the elastic arm 123 will no longer be pressed and rebound to abut against the abutting portion 1321.

At this time, the support member 13a is mounted on the bottom plate 12. Specifically, the positioning body 131 is received in the limiting space 125, and the positioning portion 1311 of the positioning body 131 is limited to the second plate of the blocking body 124 and the inner plate 121. Between the faces 1212, the top abutting body 132 abuts against the free end 1231 of the elastic arm 123 to maintain the relative position of the support member 13a and the bottom plate 12.

In more detail, the positioning portion 1311 of the positioning body 131 abuts against the lateral blocking portion 1241 of the blocking body 124, and the abutting portion of the topping body 132 1321 abuts the free end 1231 of the spring arm 123 so that the support member 13a cannot be laterally displaced along the second plate surface 1212.

Furthermore, the positioning portion 1311 of the positioning body 131 is limited to the longitudinal blocking portion 1242 of the blocking body 124 and the second plate surface 1212 of the built-in plate body 121, so that the supporting member 13a cannot be along the vertical second plate surface. Longitudinal displacement in the 1212 direction.

Moreover, after the support member 13a is mounted on the bottom plate 12, the height of the support body 133 relative to the second plate surface 1212 of the inner plate body 121 is greater than the height of the top abutting body 132 relative to the second plate surface 1212 of the inner plate body 121. And the height of the support body 133 with respect to the second plate surface 1212 of the inner plate body 121 is greater than the height of the stopper body 124 with respect to the second plate surface 1212 of the inner plate body 121.

As shown in FIG. 7, the main board 3 is formed with a plurality of through holes 31. When the main board 3 is mounted, the main board 3 is placed on the support body 133 of the support member 13a, and the through holes 31 of the main board 3 correspond to the load. A perforation 1334 of the portion 1331. Thereafter, the fixing member 13b is bored through the through hole 31 of the main board 3 and the through hole 1334 of the supporting portion 1331 of the supporting body 133, so that the main board 3 is clamped between the fixing member 13b and the carrying portion 1331 of the supporting body 133.

In addition, if the support member 13a is to be detached from the bottom plate 12, the spring arm 123 is first applied so that the elastic arm 123 is substantially coplanar with the second plate surface 1212. Thereafter, the support member 13a may be taken out along the second plate surface 1212 of the inner plate body 121 in a direction opposite to the mounting direction.

Thereby, the structural design of the elastic arm 123 and the blocking body 124 of the bottom plate 12, and the supporting member 13a of the elastic arm 123 and the blocking body 124 are designed, so that the present invention can conform to the inner plate 121 and the outer casing 11. The support unit 13 can be quickly attached to or detached from the bottom plate 12 on the premise of substantially no gap contact.

[Second embodiment]

Referring to FIG. 10 to FIG. 13 , which is a second embodiment of the present invention, the present embodiment is similar to the first embodiment, and the same portions are not repeated. The difference between the two is mainly the support portion 1332 of the support body 133 .

Specifically, the support portion 1332 of the present embodiment has a substantially one-piece structure, and the two ends of the support portion 1332 are respectively connected to one end of the positioning portion 1311 away from the connecting portion 1312 and one end of the carrying portion 1331, so that the carrying portion 1331 can It swings elastically with respect to the positioning body 131.

Therefore, the supporting portion 1331 of the support member 13a of the present embodiment can provide a supporting force smaller than that of the first embodiment, so as to be suitable for the case where the supporting force for the supporting member 13a is small.

[Third embodiment]

Referring to FIG. 14 to FIG. 17 , which is a third embodiment of the present invention, the present embodiment is similar to the foregoing first and second embodiments, and the same portions are not repeated, and the difference mainly lies in the support of the embodiment. The unit 13 has only the support member 13a without the need for the fixing member 13b.

Specifically, the support body 133 of the embodiment has two bearing portions 1331, two support portions 1332, and an engaging portion 1333. The two bearing portions 1331 are not formed with the through holes 1334 and are spaced apart. The two supporting portions 1332 are in a sheet-like configuration, and one ends of the two supporting portions 1332 are respectively connected to opposite ends of the annular inner edge of the positioning body 131. The other ends of the two supporting portions 1332 are respectively connected to opposite ends of the bearing portion 1331. The engaging portion 1333 is located substantially between the two supporting portions 1332, and one end of the engaging portion 1333 is connected to the connecting portion 1312, and the other end of the engaging portion 1333 is suspended.

In more detail, when the support member 13a is mounted on the bottom plate 12, the height of the engaging portion 1333 relative to the second plate surface 1212 of the built-in board body 121 It is larger than the height of the carrying portion 1331 with respect to the second plate surface 1212 of the built-in plate body 121.

Therefore, when the motherboard 3 is mounted, the motherboard 3 is placed on the support 133 of the support member 13a, and the engaging portion 1333 is inserted through the through hole 31 of the motherboard 3 and engaged with the motherboard 3. The main board 3 is clamped between the engaging portion 1333 of the support body 133 and the carrying portion 1331.

Thereby, the structural design of the support member 13a (that is, the engaging portion 1333 is formed) is omitted to omit the fixing member 13b, and the effect of quickly mounting the main board 3 is achieved.

It should be noted that the engaging portion 1333 of the supporting member 13a is exemplified by the structure of FIG. 17 in the present embodiment. However, in actual application, the engaging portion 1333 is configured to clamp the main board 3 to the supporting body. The engagement between the engaging portion 1333 of the 133 and the carrying portion 1331 is not limited to FIG. For example, the engaging portion 1333 shown in FIG. 18 can also be configured.

[Effect of the embodiment of the invention]

According to the embodiment of the present invention, the electronic device is formed with the elastic arm and the blocking body through the bottom plate, so that the supporting unit can be quickly pressed against the elastic arm under the premise that the inner plate body and the outer casing have substantially no gap contact. The effect of being installed on the floor or detached from the floor.

Furthermore, through the support member design, the support unit can be adapted to different situations, for example, when the weight of the object to be supported is light, the connection portion of the support member can be designed as a cantilever structure; or, When the piece is formed, the engaging portion can be further formed.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of the invention.

[prior art]

1a‧‧‧shell

2a‧‧‧floor

3a‧‧‧ fixed seat

G‧‧‧ gap

[Embodiment of the Invention]

100‧‧‧Electronic devices

1‧‧‧Shell structure

11‧‧‧Shell

12‧‧‧floor

121‧‧‧ Built-in board

1211‧‧‧ first board

1212‧‧‧ second board

122‧‧‧External board

1221‧‧‧Power hole

123‧‧‧Bounce arm

1231‧‧‧Free end

124‧‧‧stop body

1241‧‧‧Horizontal stop

1242‧‧‧ longitudinal stop

125‧‧‧Limited space

13‧‧‧Support unit

13a‧‧‧Support

131‧‧‧ Positioning body

1311‧‧‧ Positioning Department

1312‧‧‧Connecting Department

132‧‧‧Top body

1321‧‧‧Abutment

1322‧‧‧Limited

133‧‧‧Support

1331‧‧‧Loading Department

1332‧‧‧Support

1333‧‧‧Care Department

1334‧‧‧Perforation (eg screw hole)

13b‧‧‧Fixed parts (eg screws)

2‧‧‧Power supply

3‧‧‧ motherboard

31‧‧‧Perforation

1 is a partial cross-sectional view of a conventional electronic device.

2 is a perspective view of a first embodiment of an electronic device according to the present invention.

3 is a schematic view showing another aspect of the casing structure of the first embodiment of the electronic device of the present invention.

Fig. 4 is a partially enlarged schematic view showing the area A of Fig. 2;

Figure 5 is an exploded perspective view of Figure 4.

Figure 6 is a cross-sectional view of Figure 4.

7 is a cross-sectional view showing a first embodiment of an electronic device of the present invention.

FIG. 8 is a perspective view showing the first embodiment of the electronic device according to the present invention.

FIG. 9 is a perspective view showing the first embodiment of the electronic device of the present invention with two blocking bodies.

FIG. 10 is a perspective view of a second embodiment of an electronic device according to the present invention.

Fig. 11 is a partially enlarged schematic view showing the area A of Fig. 10.

Figure 12 is a cross-sectional view of Figure 11 .

Figure 13 is a cross-sectional view showing a second embodiment of the electronic device of the present invention.

FIG. 14 is a perspective view of a third embodiment of an electronic device according to the present invention.

Fig. 15 is a partially enlarged schematic view showing the area A of Fig. 14;

Figure 16 is a cross-sectional view of Figure 15.

Figure 17 is a cross-sectional view showing a third embodiment of the electronic device of the present invention.

18 is a cross-sectional view showing another aspect of a support unit of a third embodiment of the electronic device of the present invention.

100‧‧‧Electronic devices

1‧‧‧Shell structure

11‧‧‧Shell

12‧‧‧floor

121‧‧‧ Built-in board

1211‧‧‧ first board

1212‧‧‧ second board

123‧‧‧Bounce arm

1231‧‧‧Free end

124‧‧‧stop body

1241‧‧‧Horizontal stop

1242‧‧‧ longitudinal stop

13‧‧‧Support unit

13a‧‧‧Support

131‧‧‧ Positioning body

1311‧‧‧ Positioning Department

1312‧‧‧Connecting Department

132‧‧‧Top body

1321‧‧‧Abutment

1322‧‧‧Limited

133‧‧‧Support

1331‧‧‧Loading Department

1332‧‧‧Support

1334‧‧‧Perforation (eg screw hole)

13b‧‧‧Fixed parts (eg screws)

3‧‧‧ motherboard

31‧‧‧Perforation

Claims (8)

A casing structure includes: a casing; a bottom plate disposed in the casing, and the bottom plate comprises: a built-in plate body having an opposite first plate surface and a second plate surface, the inner plate body The first plate surface abuts the inner edge of the outer casing substantially without a gap; a spring arm is gradually extended away from the inner plate body and the outer casing, and the elastic arm is connected at one end to the inner plate body, and The other end of the elastic arm is elastically displaceable and defined as a free end having a distance from a plane in which the inner plate body is located; and a stop body connected to the inner plate body and the block The stop body is disposed at a position relative to the elastic arm; and a support unit includes a substantially frame-shaped positioning body, a top abutting body, and a support body, and the positioning body has a positioning portion and a a connecting portion extending from the connecting portion of the positioning body, the supporting body extending from the positioning body, wherein the supporting body has a bearing portion and a supporting portion, the supporting portion connecting the positioning body and the supporting portion One end of the carrying portion, and the carrying portion can be phased The positioning body elastically oscillates; wherein, in the second plate surface of the inner plate body, the blocking body and the free end of the elastic arm jointly define a limiting space, the positioning of the supporting unit The outer contour shape and size of the body is relative to the limit space. The casing structure of claim 1, wherein the top abutting body has a substantially L-shaped cross section and has a top abutting portion and a limiting portion extending perpendicularly from the abutting portion, the abutting portion is Vertically extending from the positioning body The predetermined height is slightly larger than the distance between the free end of the elastic arm and the inner plate body to allow the top abutting body to abut the free end of the elastic arm. The casing structure of claim 1, wherein the positioning portion of the positioning body is located between the blocking body and the second plate surface of the inner plate body, and the top abutting body abuts The free end of the spring arm maintains the relative position of the support unit and the bottom plate. The casing structure of claim 2, wherein when the supporting unit is mounted on the bottom plate, the height of the supporting body relative to the second plate surface of the inner plate body is greater than the top abutting body relative to the inner plate The height of the second plate surface of the body, and the height of the support body relative to the second plate surface of the inner plate body is greater than the height of the blocking body relative to the second plate surface of the inner plate body. The casing structure of claim 1, wherein the support body has a engaging portion, the engaging portion is coupled to the supporting portion; when the supporting unit is mounted to the bottom plate, the engaging portion is opposite to the supporting portion The height of the second plate surface of the inner plate body is greater than the height of the bearing portion relative to the second plate surface of the inner plate body. An electronic device includes a casing structure and a power supply, the casing structure includes: a casing; a bottom plate disposed in the casing, and the bottom plate comprises: a built-in plate body having an opposite first a plate surface and a second plate surface, the first plate surface of the inner plate body abuts the inner edge of the outer casing substantially without a gap; an outer plate body substantially perpendicularly intersects the inner plate body, and the outer plate body The external board body is formed with a power hole; a resilient arm extending away from the inner plate body and the outer casing, the elastic arm is connected to the inner plate body at one end, and the other end of the elastic arm is elastically displaced and defined as a free end, the free a distance between the end and the plane in which the inner plate body is located; and a blocking body connected to the inner plate body, wherein the blocking body is disposed at a position relative to the elastic arm; and a supporting unit The locating body has a positioning portion, a top abutting body, and a supporting body, and the positioning body has a positioning portion and a connecting portion, and the topping body extends from the connecting portion of the positioning body. The support body is formed by extending from the positioning body, wherein the support body has a bearing portion and a supporting portion, the supporting portion is connected to the positioning body and one end of the bearing portion, and the bearing portion can elastically swing relative to the positioning body Wherein, in the second plate surface of the inner plate body, the blocking body and the free end of the elastic arm jointly define a limiting space, and the outer contour shape and size of the positioning body of the supporting unit Relative to the limit space; Source power supply disposed through the hole in the external plate and located within the housing, and the elastic arm and the position of the stop member adjacent the power supply to the area of the orthogonal projection of the inner plate. The electronic device of claim 6, wherein the top abutting body has a substantially L-shaped cross section and has a top abutting portion and a limiting portion extending perpendicularly from the top abutting portion, the abutting portion is The positioning body extends vertically to a predetermined height which is slightly larger than the distance between the free end of the elastic arm and the inner plate body to allow the top abutting body to abut the free end of the elastic arm. The electronic device of claim 6, wherein the positioning portion of the positioning body is located on the second surface of the blocking body and the inner plate body. And the top abutting body abuts the free end of the elastic arm to maintain the relative position of the supporting unit and the bottom plate.