TWM460309U - Apparatus for fastening housing - Google Patents

Abstract

The utility model discloses a latch and a shell fixing device. The latch is applicable to fixing a back plate on a shell. The shell is provided with a base and an upper cover plate, wherein the base is provided with at least one fixing rib; the back plate is arranged at one end of the fixing rib; and the upper cover plate is arranged above the fixing rib. The latch comprises a main body part, an elastic part and an interference part, wherein the main body part is arranged on an upper plate surface of the upper cover plate; one end of the main body part is pivoted on a first pivot part of the upper cover plate; a first end of the elastic part is connected to the main body part; a second end of the elastic part is pivoted on a second pivot part of the upper cover plate; the interference part is connected to the main body part; the elastic part is used for providing elastic force for the main body part to rotate the latch in a first state or a second state; when the latch is rotated in the first state, the interference part is protruded at the front edge of the upper cover plate and pressed against the upper edge of the back plate; and when the latch is rotated in the second state, the interference part is separated from the upper edge of the back plate and releases interference to the back plate. By the utility model, the back plate can be easily and conveniently assembled and disassembled.

Description

Case fixing device

This creation is related to a server accessory, and in particular to a housing fixture.

The advent of today's diversified information era has flooded all kinds of electronic products around the living environment. As technology continues to innovate and advance, it also moves electronic products toward versatility, use, and the addition of more hardware devices. Many electronic products use computers to control their actions or perform functions, so computers occupy an extremely important position.

As computer processing becomes more and more powerful, the hard disk needs to store more and more data. The hard disk on the computer server can be electrically connected to the backplane and electrically connected to the motherboard through the backplane. The operator may need to disassemble the backing plate during its use, such as when the backboard is to be maintained or serviced. However, under the limited space structure of the casing fixing device, if the assembly or loading and unloading operation of the backboard is inconvenient, it is easy for the operator to damage the backboard during the assembly or loading and unloading operation of the backboard.

The present embodiment provides a casing fixing device for arranging the backboard and allowing the user to complete the installation or removal of the backboard without using other tools.

The present embodiment provides a cabinet fixing device including a base, an upper cover, and a latch. The base has at least one fixing rib, and the upper cover is disposed above the fixing rib. One end of the fixing rib is provided with a fixing portion for arranging the back plate. The latch member is pivotally disposed on the upper surface of the upper cover for rotating to the first a state or a second state, and the latch has an interference portion. When the latch member is rotated to the first state, the interference portion protrudes from the leading edge of the upper cover plate and abuts against the upper edge of the back plate. When the latch member is rotated to the second state, the interference portion is separated from the upper edge of the backing plate and releases interference with the backing plate.

The casing fixing device of the present embodiment is fixed to the back plate through the latch member pivoted to the upper cover plate and is rotated to the first state by the latch member to fix the back plate. On the other hand, the above-mentioned casing fixing device releases the interference with the backboard when the latch member is rotated to the first state, thereby realizing a simple and convenient backplane assembly and disassembly operation.

In order to make the above features and advantages of the present invention more comprehensible, the following detailed description of the embodiments and the accompanying drawings will be described below.

In order to fully understand the present invention, the embodiments are described in detail below with reference to the accompanying drawings, and are not intended to limit the present invention.

Please refer to FIG. 1 and FIG. 2, which is an embodiment of the present invention. As shown in the figure, the present embodiment provides a casing fixing device 100 for accommodating server components such as a motherboard or a hard disk. The casing fixing device 100 of the present embodiment includes a base 110, an upper cover 120, and a latch 130. The base 110 is configured to provide a backboard 200 and has a rectangular parallelepiped receiving slot 113 for receiving server components such as a backplane 200, a motherboard, a power supply, or a hard disk. The size and shape of the accommodating groove 113 can correspond to the size and shape of the server component, and the design of the base 110 is based on the accommodating requirements of the server component. The casing fixing device 100 in this embodiment may be a Rack Mount casing fixing device 100 having a rack unit (U) height; the backing plate 200 may be a connector (FIG. Not shown) for connection to storage devices such as Hard Disk Drive (HDD) or CD player (not shown) The circuit board is formed; the material forming the base 110 may be a metal material, an alloy material, a conductive polymer material or other conductive materials, but the creation is not limited thereto.

The base 110 has at least one fixing rib 111. One end of the fixing rib 111 is provided with a fixing portion 112 for fixing the back plate 200. As shown in the figure, the fixing rib 111 of the embodiment is located at the rear end of the accommodating groove 113 and is fixed to the bottom surface of the accommodating groove 113 parallel to the opposite side walls of the accommodating groove 113. The fixing rib 111 is used to support the pedestal 110. Upper cover 120 above. The size and shape of the fixing ribs 111 are designed according to the storage requirements of a storage device such as a hard disk or a CD player. The base 110 in this embodiment has two fixing ribs 111, and the fixing ribs 111 are approximately rectangular in shape, and the fixing ribs 111 are fixed. The height of the receiving plate 113 is slightly smaller than the height of the receiving groove 113, so that the upper cover 120 disposed above the fixing rib 111 can be received in the receiving groove 113.

The upper cover 120 is disposed above the fixing rib 111. The shape of the upper cover 120 is approximately rectangular, and the shape and size of the upper cover 120 can be matched. The shape and size of the receiving groove 113. After the upper cover 120 is disposed on the fixing rib 111, the upper cover 120, the base 110, the fixing rib 111, and the back plate 200 can form a plurality of accommodating spaces at the rear end of the accommodating groove 113 to accommodate a storage device such as a hard disk. In this embodiment, the upper cover 120 can be fixed on the upper edge 102 of the fixing rib 111 by screws or heat fusion, and the length of the upper cover 120 is substantially the same as the length of the fixing rib 111, so that the leading edge of the upper cover 120 The front end 101 of the fixed rib 111 may be substantially flush with the 1202. In addition, the upper edge 201 of the back plate 200 may also be substantially flush with the upper plate surface 1201 of the upper cover 120. In this embodiment, the material forming the upper cover 120 may be a metal material, an alloy material, a conductive polymer material or other conductive materials, but the shape and material of the upper cover plate are not limited thereto.

Please refer to FIG. 3A and FIG. 4A. FIG. 3A is the A area of FIG. A partially enlarged view, FIG. 4A is a partial enlarged view of a B region of the present FIG. As shown in the figure, the front end 101 of the fixing rib 111 is provided with a fixing portion 112 for arranging the back plate 200. In the embodiment, the fixing portion 112 has a first fixing piece 1121 and a second fixing piece 1122. One end of the first fixing piece 1121 is disposed at the front end 101 of the fixing rib 111, and the other end of the first fixing piece 1121 has a first blocking wall 1123 of an approximately L shape. The first fixing piece 1121 passes through the fixing hole 210 of the back plate 200 such that the back plate 200 is disposed between the first retaining wall 1123 and the front end 101 of the fixing rib 111. Thereby, the back plate 200 disposed on the fixing portion 112 can abut against the first retaining wall 1123 or abut the front end 101 of the fixing rib 111 in the direction of the X-axis.

The second fixing piece 1122 is located below the first fixing piece 1121 for supporting the lower edge 202 of the back plate 200. Specifically, the back plate 200 disposed on the fixing portion 112 can abut against the second fixing piece 1122 in the direction of the Z axis. In this embodiment, the front end of the second fixing piece 1122 is provided with a second retaining wall 1124, and the second retaining wall 1124 is formed by bending the front end of the second fixing piece 1122 upward. The back plate 200 disposed on the fixing portion 112 is located between the second retaining wall 1124 and the front end 101 of the fixing rib 111. Thereby, the back plate 200 disposed on the fixing portion 112 can abut the second block in the direction of the X-axis. Wall 1124. It should be noted that the shape, size and setting position of the fixing portion 112 are designed according to actual needs by those skilled in the art, for example, according to the shape, size, mounting position or setting of the fixing hole 210 of the backboard 200. Designed for location, this creation is not limited to this.

Please refer to FIG. 3B and FIG. 4B. FIG. 3B is a partially enlarged top view of the area A of FIG. 1 of the present creation, and FIG. 4B is a partially enlarged top view of the area B of the present drawing. As shown in the figure, the upper plate surface 1201 of the upper cover 120 is further provided with a first pivot portion 121 and a second pivot portion 122 for enabling the latch member 130. The upper plate surface 1201 of the upper cover 120 is pivoted. The first pivot portion 121 and the second pivot portion 122 are both adjacent to the front edge 1202 of the upper cover 120, and the distance from the first pivot portion 121 to the front edge 1202 of the upper cover 120 is smaller than the second pivot portion 122 to the upper cover. The distance from the leading edge 1202 of 120. Furthermore, the first pivot portion 121 and the second pivot portion 122 are both located at a common reference axis W, and the direction of the common reference axis W is substantially parallel to the direction of the X axis.

The upper plate surface 1201 of the upper cover 120 is further provided with a first stopping portion 123 and a second stopping portion 124. The first stopping portion 123 and the second stopping portion 124 are respectively located at two sides of the common reference axis W. The first stop portion 123 and the second stop portion 124 are both protruded from the upper plate surface 1201 of the upper cover 120 , and the distance from the first stop portion 123 to the front edge 1202 of the upper cover plate 120 is smaller than the second stop portion 124 . The distance to the leading edge 1202 of the upper cover 120. As shown in the figure, the first stopper portion 123 is a sheet body that is erected on the upper plate surface 1201, and the second stopper portion 124 is a cylindrical body that is erected on the upper plate surface 1201. It is worth mentioning that the first stopping portion 123 has a fastening structure 1231. The fastening structure 1231 is connected to the top end of the first stopping portion 123 and extends from the top end of the first stopping portion 123 toward the front edge 1202 of the upper cover 120. In addition, the size, shape and arrangement position of the first stopping portion 123 and the second stopping portion 124 are designed according to actual needs by those skilled in the art, for example, according to the shape, size and mounting of the latching member 130. Designed with location, this creation is not limited by this.

Referring to FIG. 3A to FIG. 5, the latching member 130 is pivotally disposed on the upper plate surface 1201 of the upper cover 120 for rotating to a first state or a second state along a rotational path P. The latch 130 has an interference portion 131, a body portion 132 and an elastic portion 133, and the interference portion 131 is an extension of the front end 1322 of the body portion 132. When the latch member 130 is rotated to the first state along the rotational path P, that is, when the main body portion 132 abuts against the first stopper portion 123, the interference portion 131 can protrude. The front edge 1202 of the upper cover 120 is protruded and abuts against the upper edge 201 of the back plate 200 for interference with the back plate 200. When the latching member 130 is rotated to the second state along the rotational path P, that is, when the main body portion 132 abuts against the second stopping portion 124, the interference portion 131 can be separated from the upper edge 201 of the back plate 200, and The interference with the backing plate 200 is released.

One end of the main body portion 132 is pivotally disposed on the first pivot portion 121 of the upper cover 120 . The first end 1331 of the elastic portion 133 is connected to the main body portion 132 , and the second end 1332 of the elastic portion 133 is pivotally disposed on the second pivot portion 122 of the upper cover 120 . In this embodiment, the main body portion 132 is a substantially L-shaped plate body having oppositely disposed upper surfaces 1323 and lower surfaces (not shown), and the upper surface 1323 and the lower surface of the plate body are substantially parallel to the upper cover 120. Upper plate surface 1201. The main body portion 132 also has a connecting post 1325 for connecting the elastic portion 133. The connecting post 1325 protrudes from the upper surface 1323 of the main body portion 132 and is located at a substantially central position of the main body portion 132. The end portion 1321 of the main body portion 132 is pivotally disposed on the first pivot portion 121 so that the main body portion 132 can rotate in a direction parallel to the horizontal surface of the upper cover 120 with the tail end 1321 as an axis; the elastic portion 133 can have a telescopic force. Elastic materials, such as linear springs, rubber, but this creation is not limited to this.

The first end 1331 of the elastic portion 133 in this embodiment is connected to the center position of the main body portion 132. Specifically, the first end 1331 of the elastic portion 133 is coupled to the connecting post 1325 of the main body portion 132. The second end 1332 of the elastic portion 133 is pivotally disposed on the second pivot portion 122. The distance between the first pivot portion 121 and the second pivot portion 122 is smaller than the distance between the connecting post 1325 and the second pivot portion 122. The elastic portion 133 is configured to provide an elastic force to the main body portion 132, so that the main body portion 132 rotates to the first state along the rotation path P with the tail end 1321 as an axis, and abuts against the first stopping portion 123 of the upper cover 120. . When the main body portion 132 is rotated to the first state, the elastic portion 133 is biased toward the first stopping portion 123 From the common reference axis W.

In detail, when the elastic portion 133 is located at the common reference axis W, it has a large tensile deformation amount, that is, the extension length when the elastic portion 133 is deviated from the common reference axis W is smaller than the elastic portion 133 is located at the common reference axis W. The length of the extension. Therefore, when the latch member deviates from the common reference axis W, the elastic portion 133 generates a deformation restoring force to provide an elastic force to the main body portion 132, and shrinks the main body portion 132 so that the main body portion 132 can face the first through the rotational path P The stopper 123 is rotated to the first state.

Furthermore, the first stopping portion 123 protrudes from the upper plate surface 1201 of the upper cover 120, and the first stopping portion 123 is located on the rotating path P of the main body portion 132, as shown in FIG. 3B. When the main body portion 132 is rotated to the first state and abuts against the first stopper portion 123, the elastic portion 133 provides an elastic force to the main body portion 132 to fix the latch member 130. In detail, when the latch member 130 is in the first state, the elastic portion 133 still has a tensile deformation, and thus the elastic portion 133 continues to generate a deformation restoring force to continuously provide an elastic force to the main body portion 132 while contracting and pulling the main body portion 132. At this time, the main body portion 132 abuts against the first stopper portion 123, whereby the elastic force provided by the elastic portion 133 causes the main body portion 132 not to be displaced to fix the latch member 130. In addition, after the main body portion 132 abuts against the first stopping portion 123 , the fastening structure 1231 of the first stopping portion 123 can be fastened to the outer edge of the main body portion 132 to help fix the latching member 130 .

On the other hand, the elastic portion 133 is configured to provide an elastic force to the main body portion 132, so that the main body portion 132 rotates to the second state along the rotation path P with the tail end 1321 as an axis, and abuts against the second cover 120. Stop portion 124. When the main body portion 132 is rotated to the second state, the elastic portion 133 is deviated from the common reference axis W toward the second stopper portion 124. Therefore, the elastic portion 133 generates a deformation restoring force to provide an elastic force to the main body portion 132, and shrinks and pulls the main body portion. 132, the main body portion 132 is rotatable toward the second stopping portion 124 to the second state along the rotation path P.

Furthermore, the second stopping portion 124 protrudes from the upper plate surface 1201 of the upper cover 120 and is located on the rotation path P of the main body portion 132 as shown in FIG. 4B. The elastic portion 133 provides an elastic force to the main body portion 132 to fix the latch member 130. Similarly, when the latch member 130 is in the second state, the elastic portion 133 still has a tensile deformation, and thus the elastic portion 133 continues to provide an elastic force to the main body portion 132 while contracting and pulling the main body portion 132. At this time, the main body portion 132 abuts against the second stopper portion 124, whereby the elastic force provided by the elastic portion 133 causes the main body portion 132 not to be displaced to fix the latch member 130.

It should be noted that in this embodiment, the user can push the latching member 130 to move the latching member 130 away from the first state, and rotate along the rotational path P toward the second stopping portion 124 to rotate to Second state. Conversely, the user can also push the latch member 130 to move the latch member 130 away from the second state and rotate toward the first stop portion 123 along the rotational path P to rotate to the first state. Thereby, the interference of the latching member 130 with the backing plate 200 is switched. For example, as shown, the main body portion 132 further has a pushing wall 1326 protruding from the upper surface 1323 of the main body portion 132 and located at the front end 1322 of the main body portion 132. The user can push the body portion 132 via the pusher wall 1326 to move the latch member 130 away from the first state or the second state.

Additionally, the cabinet fixture 100 can have one or more latches 130. In this embodiment, the casing fixing device 100 has two latching members 130 for enhancing the stability of the interference of the latching member 130 with the backboard 200, and the upper plate surface 1201 of the upper cover 120 can correspond to the latching. The member 130 is provided with one or more sets of the first pivot portion 121, the second pivot portion 122, the first stopping portion 123 and the second stopping portion 124, so that the latching members 130 can be respectively pivoted on the upper cover 120. Upper plate surface 1201.

Referring to FIG. 3A and FIG. 4A , the first fixing piece 1121 can also abut against the conductive member 220 of the back plate 200 , wherein the conductive member 220 is disposed around the fixing hole 210 . The conductive member 220 is electrically connected to a grounding circuit (not shown) on the backplane 200, so that the charge accumulated by the grounding circuit of the backing plate 200 can be derived from the first fixing piece 1121 via the fixing rib 111 by the conductive member 220 and the first fixing piece 1121. . Specifically, the first fixing piece 1121 can be sandwiched between the first conductive piece 221 and the second conductive piece 222 of the conductive member 220. In another embodiment of the present invention, the conductive member 220 disposed around the fixing hole 210 includes a first conductive sheet 221 and a second conductive sheet 222. The first conductive sheet 221 and the second conductive sheet 222 are respectively disposed on the two sides of the fixing hole 210. The first conductive sheet 221 or the second conductive sheet 222 is electrically connected to the grounding circuit on the back board 200, and the first conductive sheet 221 or the first conductive sheet 221 One end of the two conductive sheets 222 may extend to the fixing holes 210. Thereby, the first fixing piece 1121 passing through the fixing hole 210 can abut against the ends of the first conductive piece 221 and the second conductive piece 222 and sandwiched between the first conductive piece 221 and the second conductive piece 222 The first conductive sheet 221 and the second conductive sheet 222 in this embodiment may be metal domes, conductive tapes or other conductive materials, and the present invention is not limited thereto.

According to various embodiments of the present invention, the above-mentioned casing fixing device 100 is latched by the latching member 130 pivoted on the upper surface 1201 of the upper cover 120 and is rotated to the first state by the latching member 130. The interference portion 131 of the member 130 can protrude from the front edge 1202 of the upper cover 120 and abut against the upper edge 201 of the back plate 200 to fix the back plate 200 disposed on the fixing rib 111. On the other hand, when the latch member 130 is rotated to the second state, the interference portion 131 of the latch member 130 can be separated from the upper edge 201 of the back plate 200 to release interference with the back plate 200. Thereby, the above-mentioned casing fixing device 100 allows the user to use no other The installation or removal of the backboard 200 is completed under the premise of the tool, and the damage of the backboard 200, the base 110 or the upper cover 120 in the operation of installing or removing the backboard 200 can be reduced.

The above description is only an embodiment of the present invention, and is not intended to limit the scope of patent protection of the present invention. Anyone who is familiar with the art of the artist, within the spirit and scope of the creation, the equivalent of the change and retouching is still within the scope of the patent protection of this creation.

100‧‧‧Cabinet fixture

200‧‧‧ Backplane

201‧‧‧back plate edge

202‧‧‧ lower edge of the backplane

210‧‧‧Fixed holes

220‧‧‧Electrical parts

221‧‧‧First conductive sheet

222‧‧‧Second conductive sheet

110‧‧‧Base

113‧‧‧ accommodating slots

111‧‧‧Fixed ribs

101‧‧‧Fixed rib front end

102‧‧‧Fixed rib upper edge

112‧‧‧Fixed Department

1121‧‧‧First fixed piece

1123‧‧‧First retaining wall

1122‧‧‧Second fix

1124‧‧‧Second retaining wall

120‧‧‧Upper cover

1201‧‧‧ Upper cover upper plate

1202‧‧‧Top cover front edge

121‧‧‧First pivot

122‧‧‧Second pivot

123‧‧‧First stop

124‧‧‧Second stop

130‧‧‧Latch

131‧‧‧Interference Department

132‧‧‧ Main body

1321‧‧‧The end of the main body

1322‧‧‧ front end of the main body

1323‧‧‧ Upper surface of the main body

1325‧‧‧Connecting column

1326‧‧‧ push the wall

133‧‧‧Flexible Department

1331‧‧‧The first end of the elastic part

1332‧‧‧Second end of the elastic part

1 is a perspective view of a casing fixing device according to an embodiment of the present invention in a first state.

2 is a perspective view of the casing fixing device according to an embodiment of the present invention in a second state.

Fig. 3A is a partially enlarged view of the area A of Fig. 1 of the creation.

Fig. 3B is a partially enlarged top plan view showing the area A of Fig. 1;

4A is a partial enlarged view of the area B of FIG. 2 of the creation.

4B is a partially enlarged top view of the area B of the creation of FIG. 2.

Figure 5 is a partially enlarged exploded view of the area B of Figure 2 of the present invention.

100‧‧‧Cabinet fixture

200‧‧‧ Backplane

201‧‧‧back plate edge

202‧‧‧ lower edge of the backplane

110‧‧‧Base

113‧‧‧ accommodating slots

111‧‧‧Fixed ribs

112‧‧‧Fixed Department

120‧‧‧Upper cover

1201‧‧‧ Upper cover upper plate

1202‧‧‧Top cover front edge

121‧‧‧First pivot

122‧‧‧Second pivot

123‧‧‧First stop

124‧‧‧Second stop

130‧‧‧Latch

131‧‧‧Interference Department

Claims (23)

A latching member is adapted to fix a backboard to a casing, the casing having a base and an upper cover, wherein the base has at least one fixing rib, and the backing plate is disposed at one end of the fixing rib, The upper cover plate is disposed above the fixing rib. The latching member includes: a main body portion disposed on one of the upper cover plates, and one end of the main body portion is pivotally disposed on the first pivot of the upper cover plate a resilient portion, a first end of the resilient portion is coupled to the body portion, a second end of the resilient portion is pivotally disposed on a second pivot portion of the upper cover; and an interference portion is coupled to the portion The main body portion; wherein the elastic portion is configured to provide an elastic force to the main body portion to rotate the latch member to a first state or a second state, when the latch member is rotated to the first state, The interference portion protrudes from a front edge of the upper cover plate and abuts against an upper edge of the back plate, and when the latch member is rotated to the second state, the interference portion is separated from the upper edge of the back plate and released Interference with the backplane. The latching member of claim 1, wherein the elastic portion is configured to provide an elastic force to the main body portion, the latch member is rotated to the first state and abuts against the upper cover a stop. The latch member of claim 2, wherein the elastic portion is configured to provide an elastic force to the main body portion, the latch member is rotated to the second state and abuts against the upper cover Two stop parts. The latching member of claim 3, wherein the first stopping portion and the second stopping portion are respectively protruded from the upper plate surface of the upper cover. The latching member of claim 1, wherein the elastic portion extends in a direction parallel to the upper plate surface of the upper cover. The latching member of claim 1, wherein the first pivot portion and the second pivot portion are disposed on the upper plate surface of the upper cover. The latching member of claim 1, wherein the first end of the elastic portion is connected to a connecting post of the main body portion, and the connecting post protrudes from an upper surface of the main body portion. The latching member of claim 7, wherein a distance between the first pivot portion and the second pivot portion is smaller than a distance between the connecting post and the second pivot portion. The latching member of claim 7, wherein the main body portion has a pushing wall protruding from the upper surface of the main body portion. A housing fixing device includes: a base having at least one fixing rib, one end of the fixing rib is provided with a fixing portion for arranging a back plate; and an upper cover plate disposed above the fixing rib; a latching member having an interference portion pivotally disposed on an upper surface of the upper cover for rotating to a first state or a second state; wherein when the latch member is rotated to In the first state, the interference portion protrudes from a front edge of the upper cover plate and abuts against an upper edge of the back plate. When the latch member is rotated to the second state, the interference portion is separated from the back portion. The upper edge of the plate releases interference with the backing plate. The housing fixing device of claim 10, wherein the latching member has a main body portion and an elastic portion, and one end of the main body portion is pivotally disposed on a first pivot portion of the upper cover plate, a first end of the elastic portion is connected to the main body portion, and a second end of the elastic portion is pivotally disposed on a second pivot portion of the upper cover plate for providing an elastic force to the main body portion, so that the main body portion Rotating to the first state and abutting against one of the first stops of the upper cover. The casing fixing device of claim 11, wherein the elastic portion is configured to provide an elastic force to the main body portion, and the main body portion is rotated to the second state and abuts against one of the upper cover plates. Two stop parts. The casing fixing device of claim 12, wherein the first stopping portion and the second stopping portion are respectively protruded from the upper plate surface of the upper cover. The casing fixing device of claim 11, wherein the elastic portion extends in a direction parallel to the upper plate surface of the upper cover. The casing fixing device of claim 11, wherein the first pivot portion and the second pivot portion are disposed on the upper plate surface of the upper cover. The housing fixing device of claim 11, wherein the first end of the elastic portion is connected to a connecting post of the main body portion, and the connecting post protrudes from an upper surface of the main body portion. The casing fixing device of claim 16, wherein a distance between the first pivot portion and the second pivot portion is smaller than a distance between the connecting post and the second pivot portion. The casing fixing device of claim 16, wherein the main body portion has a pushing wall protruding from the upper surface of the main body portion. The casing fixing device of claim 10, wherein the fixing portion has a first fixing piece for passing through a fixing hole of the back plate, and one end of the first fixing piece is disposed on the fixing rib. The other end of the first fixing piece has a first retaining wall disposed between the first retaining wall and the end of the fixing rib. The casing fixing device of claim 19, wherein the fixing portion has a second fixing piece located below the first fixing piece, Support the lower edge of the back panel. The casing fixing device of claim 20, wherein one end of the second fixing piece is provided with a second retaining wall, and the backing plate is disposed between the second retaining wall and the end of the fixing rib. The casing fixing device of claim 19, wherein the first fixing piece abuts against one of the conductive members of the back plate, and the conductive member is disposed around the fixing hole. The casing fixing device of claim 22, wherein the first fixing piece is sandwiched between one of the first conductive piece and the second conductive piece of the conductive member.