CN108287595B - HDD Tray and HDD Carrier Assembly - Google Patents

Abstract

A hard disk tray is suitable for carrying a hard disk, and the hard disk tray includes a base and a cover. The base includes a bottom plate and two base side plates connected to the bottom plate. The cover is pivotally connected to the base, and includes a top plate and two cover side plates connected to the top plate, wherein each cover side plate and one of the corresponding base side plates include a retractable first fixing member, and the other includes a fixing hole corresponding to the first fixing member. The hard disk is suitable to be located between the base and the cover, and when the cover is closed to the base, these first fixing members extend into the corresponding fixing holes to fix the relative position of the cover and the base. When the cover is flipped up relative to the base, each first fixing member retracts along the wall of the fixing hole and exits from the corresponding fixing hole. The present invention further provides a hard disk bracket assembly.

Description

HDD Tray and HDD Carrier Assembly

technical field

The present invention relates to a tray and bracket assembly, and more particularly, to a hard disk tray and hard disk bracket assembly.

Background technique

Generally speaking, if a hard disk is to be installed in a server, the hard disk is usually locked to a hard disk tray (HDDtray), and then a plurality of hard disk trays are fixed to a hard disk rack (HDD rack) to be installed in the server together. However, since the number of hard disks disposed in the server is quite large, when the operator wants to assemble, replace or repair the hard disks, there will be quite complicated locking and disassembly procedures.

In addition, a new type of server has been developed, which is also called Open Computing Project (OCP) server, which requires hot swap of hard disks. It is convenient to perform the function of hot insertion.

SUMMARY OF THE INVENTION

The present invention provides a hard disk tray, which can fix the hard disk to the hard disk tray without using screws, and can effectively improve the efficiency of assembling and disassembling the hard disk.

The present invention provides a hard disk bracket assembly, the hard disk tray of which can be fixed to the hard disk rack in a non-locking manner.

A hard disk tray of the present invention is suitable for carrying a hard disk, and the hard disk tray includes a base and a cover. The base includes a base plate and two base side plates connected to the base plate. The cover body is pivotally connected to the base, and includes a top plate and two cover body side plates connected to the top plate, wherein one of each cover body side plate and the corresponding base side plate includes a retractable first fixing member, and the other One includes a fixing hole corresponding to the first fixing member. The hard disk is suitable for being located between the base and the cover, and when the cover is closed on the base, the first fixing members extend into the corresponding fixing holes to fix the relative positions of the cover and the base. When the cover body is turned up relative to the base, each first fixing member shrinks inward along the wall surface of the fixing hole and withdraws from the corresponding fixing hole.

In an embodiment of the present invention, each of the above-mentioned first fixing members includes a casing with a concave hole, an elastic member located in the concave hole, and a ball connected to the elastic member, and the ball normally partially protrudes from the elastic member. A recessed hole, and is adapted to be retracted into the recessed hole when compressed.

In an embodiment of the present invention, the above-mentioned two base side plates respectively include a plurality of holes, and the holes surround a plurality of cantilevers, the cantilevers respectively include a plurality of second fixing members protruding from the inner surface, and the hard disk includes There are a plurality of screw holes on both sides. When the hard disk is located in the hard disk tray, the second fixing parts are adapted to extend into the screw holes of the hard disk.

In an embodiment of the present invention, the bottom plate of the base includes a third fixing member, the hard disk includes a screw hole on the bottom surface, and when the hard disk is located in the hard disk tray, the third fixing member is suitable for extending into the screw hole of the hard disk .

A hard disk bracket assembly of the present invention is suitable for carrying a hard disk, and the hard disk bracket assembly includes a hard disk rack and a hard disk tray. The hard disk rack includes a rack body, a plurality of fixing structures and a connector. The fixing structure is disposed on the frame body to form a track, and at least one fixing structure includes a first stopper. The connector is arranged on the frame body and is located at the end of the track. The hard disk tray is detachably arranged on the fixed structures along the track, and includes a base and a cover. The base includes a base plate and two base side plates connected to the base plate. The cover body is pivotally connected to the base, and includes a top plate and two cover body side plates connected to the top plate, wherein at least one cover body side plate includes a first arc-shaped edge corresponding to the first stopper, and each cover body side plate is connected to the top plate. One of the corresponding base side panels includes a retractable first fixing member, and the other includes a fixing hole corresponding to the first fixing member. The hard disk is suitable for being located between the base and the cover. When the hard disk tray is located on the track of the hard disk rack and the cover is closed on the base, the first arc-shaped edge of the side plate of the cover is located beside the first stopper of the fixing structure, and these The first fixing member extends into the corresponding fixing holes to fix the relative position of the cover body and the base. When the hard disk tray is located on the track of the hard disk rack and the cover is turned up relative to the base, the first arc-shaped edge of the side plate of the cover pushes against the first stopper of the fixed structure along with the rotation of the cover, so that the base moves away from the base. The direction of the connector moves, and each first fixing member shrinks inward along the wall surface of the fixing hole and exits the corresponding fixing hole.

In an embodiment of the present invention, the above-mentioned at least one fixing structure includes a second stopper, and at least one cover side plate includes a second arc-shaped edge corresponding to the second stopper. When the cover is closed on the base When the cover body rotates, the second arc-shaped edge of the side plate of the cover body pushes against the second stopper of the fixing structure as the cover body rotates, so that the base moves in the direction of the connector.

In an embodiment of the present invention, each of the above-mentioned first fixing members includes a casing with a concave hole, an elastic member located in the concave hole, and a ball connected to the elastic member, and the ball normally partially protrudes from the elastic member. A recessed hole, and is adapted to be retracted into the recessed hole when compressed.

In an embodiment of the present invention, the above-mentioned two base side plates respectively include a plurality of holes, and the holes surround a plurality of cantilevers, the cantilevers respectively include a plurality of second fixing members protruding from the inner surface, and the hard disk includes There are a plurality of screw holes on both sides. When the hard disk is located in the hard disk tray, the second fixing parts are adapted to extend into the screw holes of the hard disk.

In an embodiment of the present invention, the bottom plate of the base includes a third fixing member, the hard disk includes a screw hole on the bottom surface, and when the hard disk is located in the hard disk tray, the third fixing member is suitable for extending into the screw hole of the hard disk .

In an embodiment of the present invention, the above-mentioned at least one base side plate includes a fourth fixing member protruding from the outer surface, and at least one fixing structure includes a limiting portion corresponding to the fourth fixing member to limit the hard disk tray The position relative to the hard drive cage.

Based on the above, the hard disk tray of the hard disk tray assembly of the present invention is pivotally connected to the base through the cover body, and when the cover body is closed on the base, the first fixing member of the cover body side plate or the base side plate protrudes into the other's The fixing hole is used to fix the relative position of the cover body and the base, so that the hard disk is enclosed in the hard disk tray. When the cover body is turned up relative to the base, each first fixing member shrinks inward along the wall surface of the fixing hole, and can easily withdraw from the corresponding fixing hole. In addition, the hard disk bracket of the hard disk bracket assembly is arranged on the rack body through a fixed structure to form a track for the hard disk tray to slide. The second arc-shaped edge pushes against the second stopper of the fixed structure as the cover rotates, so that the base moves toward the connector, so that the hard disk in the hard disk tray is connected to the connector; when the hard disk tray is located in the hard disk rack When the cover body is turned up relative to the base on the track, the first arc-shaped edge of the side plate of the cover body pushes against the first stopper of the fixed structure as the cover body rotates, so that the base moves away from the connector, and Disengage the hard drive located in the hard drive tray directly from the connector on the hard drive cage.

In order to make the above-mentioned features and advantages of the present invention more obvious and easy to understand, the following embodiments are given and described in detail with the accompanying drawings as follows.

Description of drawings

FIG. 1 is a schematic diagram of a cover of a hard disk tray closed on a base according to an embodiment of the present invention.

FIG. 2 is a schematic view showing that the cover of the hard disk tray of FIG. 1 is lifted.

FIG. 3 is a schematic diagram of a hard disk being loaded into the hard disk tray of FIG. 1 .

FIG. 4A is an exploded schematic view of the hard disk and the hard disk tray of FIG. 1 .

FIG. 4B is a schematic cross-sectional view of the first fixing member of FIG. 4A .

5 is a schematic diagram of a hard disk tray assembly according to an embodiment of the present invention.

FIG. 6 is a schematic partial side view of FIG. 5 .

FIG. 7 is a schematic diagram illustrating that the hard disk tray of the hard disk tray assembly of FIG. 5 is installed in the hard disk rack and the cover body has not been closed on the base.

FIG. 8 is a schematic partial side view of FIG. 7 .

FIG. 9 is a schematic view of the cover body of FIG. 8 being closed on the base.

FIG. 10 is a schematic top view of the hard disk being put into the hard disk tray and the cover body being hidden.

FIG. 11 is a schematic partial side view of the hard disk tray of FIG. 7 being withdrawn from the hard disk rack.

Among them, reference numerals:

10: Hard Disk

12: Screw holes

20: Hard drive bay assembly

30: Hard drive bay

40: Frame

50: Fixed structure

52: First stopper

54: Second stopper

56: Limiting part

58: Orbit

60: Connector

100: Hard disk tray

110: Base

111: Bottom plate

112: Third fixing piece

113: Base side panel

114: Fixing hole

115: Hole

116: Cantilever

117: Second fastener

118: Fourth fastener

120: Cover

121: Top Plate

122: Cover side panel

123: Recessed hole

124: First Fixture

125: Elastic

126: Ball

127: First Arc Edge

128: Second Arc Edge

130: Elastic

Detailed ways

The hard disk tray 100 of the present embodiment is suitable for a hard disk 10 (shown in FIG. 3 and FIG. 4A ) to be fixed thereon, and installed together with other hard disk trays 100 in a hard disk rack (not shown) of a server (not shown). shown in Figure 5). In this embodiment, the hard disk tray 100 is a hard disk tray of a 3.5-inch hard disk, but in other embodiments, the hard disk tray 100 can also be a hard disk tray of a 2.5-inch hard disk, and the size of the hard disk tray 100 can correspond to the size of the hard disk to be fixed The size of the hard disk 10 is adjusted. The hard disk tray 100 of this embodiment can fix the hard disk 10 in a screw-free manner, so as to provide the operator with a more convenient and fast use effect, which will be further described below.

FIG. 1 is a schematic diagram of a cover of a hard disk tray closed on a base according to an embodiment of the present invention. FIG. 2 is a schematic view showing that the cover of the hard disk tray of FIG. 1 is lifted. FIG. 3 is a schematic diagram of a hard disk being loaded into the hard disk tray of FIG. 1 . FIG. 4A is an exploded schematic view of the hard disk and the hard disk tray of FIG. 1 .

Referring to FIGS. 1 to 4A , the hard disk tray 100 of the present embodiment is suitable for carrying a hard disk 10 (shown in FIGS. 3 and 4A ). The hard disk tray 100 includes a base 110 , a cover 120 and at least one elastic member 130 . The base 110 includes a base plate 111 and two base side plates 113 connected to the base plate 111 . The cover 120 is pivotally connected to the base 110 , and an elastic member 130 (shown in FIG. 4A , for example, a torsion spring) is disposed at the pivotal connection between the base 110 and the cover 120 .

The cover body 120 includes a top plate 121 and two cover body side plates 122 connected to the top plate 121, wherein one of each cover body side plate 122 and the corresponding base side plate 113 includes a retractable first fixing member 124, and the other One includes a fixing hole 114 corresponding to the first fixing member 124 .

As shown in FIG. 4A , in this embodiment, each cover side plate 122 includes a hole and a first fixing member 124 fixed on the hole. The hole of the cover side plate 122 may be a through hole, but in other embodiments , the hole of the cover side plate 122 can also be a hole punched in the cover side plate 122, which is not limited by the drawings. The first fixing member 124 passes through the hole of the cover side plate 122 and protrudes from the outer surface of the cover body side plate 122 . The base side plate 113 is provided with a fixing hole 114 at a position corresponding to the first fixing member 124 for The first fixing member 124 protrudes in.

FIG. 4B is a schematic cross-sectional view of the first fixing member 124 of FIG. 4A . Referring to FIG. 4B , each of the first fixing members 124 includes a housing with a recessed hole 123 , an elastic member 125 located in the recessed hole 123 , and a ball 126 connected to the elastic member 125 . The elastic member 125 is, for example, a spring, a ball 126 normally partially protrudes out of the concave hole 123 and is adapted to be retracted into the concave hole 123 when compressed.

As shown in FIG. 3 , the hard disk 10 is suitable to be placed between the base 110 and the cover 120 . When the cover 120 is closed on the base 110 , as long as the cover 120 is pressed down, the first fixing members 124 of the cover 120 The fixing holes 114 of the base 110 are inserted to fix the relative positions of the cover 120 and the base 110 to enclose the hard disk 10 in the hard disk tray 100 . At this time, the elastic element 130 will accumulate elastic potential energy. If the user wants to lift the cover body 120 , he only needs to lift the cover body 120 with a slight force. At this time, each first fixing member 124 retracts along the wall surface of the fixing hole 114 and withdraws from the corresponding fixing hole 114 , and elastically The member 130 releases the accumulated elastic potential energy, so that the cover body 120 is turned up relative to the base 110 . Of course, in other embodiments, the elastic member 130 can also be omitted, and the cover body 120 can be lifted up manually instead.

In addition, as shown in FIG. 4A , the hard disk 10 includes a plurality of screw holes 1212 located on both side surfaces and the bottom surface of the hard disk 10 . The two base side panels 113 of the hard disk tray 100 respectively include a plurality of holes 115 , and the holes 115 surround a plurality of cantilevers 116 , and the cantilevers 116 respectively include a plurality of second fixing members 117 protruding from the inner surface. In this embodiment, the bottom plate 111 of the base 110 includes a third fixing member 112 . The second fixing member 117 can be a structure in which the cantilever 116 is protruded, or the cantilever 116 is riveted, welded or screwed to the boss. The third fixing member 112 can be riveted, welded or screwed to the base 111. The types of the second fixing member 117 and the third fixing member 112 are not limited thereto.

When the hard disk 10 is located in the hard disk tray 100 , the second fixing members 117 and the third fixing members 112 extend into the screw holes 12 on the two sides and the bottom surface of the hard disk 10 to more firmly fix the hard disk 10 . Therefore, the hard disk tray 100 of the present embodiment utilizes the design that the hard disk 10 is provided with screw holes 12 at specific positions, and the second fixing member 117 and the third fixing member 112 are provided at the positions corresponding to the screw holes 12, so as to achieve a screw-free The hard disk 10 is fixed in a way to make the installation or removal more convenient for the operator.

5 is a schematic diagram of a hard disk tray assembly according to an embodiment of the present invention. FIG. 6 is a schematic partial side view of FIG. 5 . Please refer to FIG. 5 and FIG. 6 , the hard disk bracket assembly 20 includes a hard disk rack 30 and a hard disk tray 100 . In this embodiment, the hard disk tray 100 of the hard disk tray assembly 20 is taken as an example of the hard disk tray 100 in FIG. 1 . Therefore, the component symbols of the above-mentioned embodiment are continued below. Of course, in other embodiments, the hard disk tray assembly 20 can also use other hard disk trays.

The hard disk rack 30 includes a rack body 40 , a plurality of fixing structures 50 and a connector 60 . The fixing structures 50 are disposed on the frame body 40 to form at least one rail 58 . The hard disk tray 100 is detachably arranged on the fixing structures 50 along the rail 58 .

More specifically, in this embodiment, the hard disk rack 30 includes five sets of fixing structures 50 and four connectors 60 . Track 58. Thus, the five sets of securing structures 50 form four tracks 58 that can be used to guide the four hard disk trays 100 . Four connectors 60 are arranged at the ends of the four rails 58 for connecting the hard disks 10 in the hard disk trays 100 . Of course, the number of the fixing structures 50 is not limited thereto, and the designer can adjust the number and arrangement positions of the fixing structures 50 according to the size, so as to adjust the number of the hard disk trays 100 that can be fixed.

At least one fixing structure 50 includes a first blocking member 52 , a second blocking member 54 and at least one limiting portion 56 . At least one cover side plate 122 of each hard disk tray 100 includes a first arc-shaped edge 127 corresponding to the first stopper 52 and a second arc-shaped edge 128 corresponding to the second stopper 54 . At least one base side plate 113 of each hard disk tray 100 includes at least one fourth fixing member 118 protruding from the outer surface and corresponding to at least one limiting portion 56 . The fourth fixing member 118 can be blocked by the limiting portion 56 to limit the position of the hard disk tray 100 relative to the hard disk rack 30 .

More specifically, in this embodiment, each fixing structure 50 includes a first stopper 52 , a second stopper 54 and four limiting portions 56 , wherein two limiting portions 56 are located in the fixing structure 50 . On one side, the other two limiting portions 56 are located on the other side of the fixing structure 50 . Each cover side plate 122 of each hard disk tray 100 includes a first arc edge 127 and a second arc edge 128 , and each base side plate 113 of each hard disk tray 100 includes two fourth fixing members 118 . In this embodiment, the fourth fixing member 118 is a convex column, and the limiting portion 56 includes a horizontal wall surface parallel to the frame body 40 and a vertical wall surface perpendicular to the frame body 40 . Of course, the form of the fourth fixing member 118 and the limiting portion 56 is not limited to this.

FIG. 7 is a schematic diagram illustrating that the hard disk tray of the hard disk tray assembly of FIG. 5 is installed in the hard disk rack and the cover body has not been closed on the base. FIG. 8 is a schematic partial side view of FIG. 7 . FIG. 9 is a schematic view of the cover body of FIG. 8 being closed on the base. FIG. 10 is a schematic top view of the hard disk being put into the hard disk tray and the cover body being hidden. FIG. 11 is a schematic partial side view of the hard disk tray of FIG. 7 being withdrawn from the hard disk rack.

Please refer to FIGS. 7 and 8 first. When the hard disk tray 100 is to be installed on the hard disk rack 30 , first lift the cover 120 of the hard disk tray 100 from the base 110 , and place the hard disk tray 100 on the track 58 of the hard disk rack 30 . At this time, the second arc-shaped edge 128 of the cover side plate 122 is close to the second stopper 54 of the fixing structure 50 . Next, the cover body 120 of the hard disk tray 100 is closed on the base 110 , the second arc-shaped edge 128 of the cover side plate 122 will push against the second stopper 54 of the fixing structure 50 along with the rotation of the cover body 120 , so that the base 110 Move toward the connector 60 to the position shown in FIG. 9 . Since the hard disk tray 100 of the hard disk tray assembly 20 of this embodiment adopts the hard disk tray 100 of FIG. 1 , after the cover 120 is closed on the base 110 , the hard disk 10 is surrounded by the fixed cover 120 and the base 110 and is fixed by the second fixed cover 120 . The member 117 is fixed with the third fixing member 112 .

It is worth mentioning that, during the process of moving the hard disk tray 100 from the position in FIG. 8 to the position in FIG. 9 , the fourth fixing member 118 (see FIG. 6 ) of the base side plate 113 of the hard disk tray 100 will slide into the limit position Since the limiting portion 56 has a horizontal wall surface parallel to the frame body 40 and a vertical wall surface perpendicular to the frame body 40, the fourth fixing member 118 is restricted by the horizontal wall surface of the limiting portion 56 and cannot move away from the frame body 40. It moves in the direction (the upper part of the drawing), and is restricted by the vertical wall surface of the stopper 56 and cannot continue to move in the direction of the connector 60 (the right side of the drawing). In addition, in FIG. 10 , a schematic diagram of placing the hard disk 10 into the hard disk tray 100 and hiding the cover 120 is specially drawn. It can be seen from FIG. 10 that when the hard disk tray 100 is installed on the hard disk rack 30 , the connector 60 is connected to the hard disk 10 . docking. In this way, after the cover 120 of the hard disk tray 100 is closed on the base 110 , the hard disk tray 100 can be fixed to the hard disk rack 30 together with the hard disks 10 .

To move the hard disk tray 100 out of the hard disk rack 30 , as shown in FIG. 11 , when the cover 120 of the hard disk tray 100 is turned up relative to the base 110 , the first arc-shaped edge 127 of the cover side plate 122 follows the cover 120 rotates and pushes against the first stopper 52 of the fixing structure 50 , so that the base 110 moves away from the connector 60 (the left side of the drawing). In this way, the hard disk 10 (shown in FIG. 10 ) is directly separated from the connector 60 . After that, the user can directly remove the hard disk tray 100 from the hard disk rack 30 by simply lifting the cover 120 . Therefore, the hard disk tray assembly 20 of the present embodiment can fix the hard disk tray 100 on the hard disk rack 30 without screwing, which is quite convenient and simple to assemble and disassemble.

To sum up, the hard disk tray of the hard disk tray assembly of the present invention is pivotally connected to the base through the cover body. When the cover body is closed on the base, the first fixing member of the cover body side plate or the base side plate protrudes into the other. These fixing holes are used to fix the relative position of the cover body and the base, so that the hard disk is enclosed in the hard disk tray. When the cover body is turned up relative to the base, each first fixing member shrinks inward along the wall surface of the fixing hole, and can easily withdraw from the corresponding fixing hole. In addition, the hard disk bracket of the hard disk bracket assembly is arranged on the rack body through a fixed structure to form a track for the hard disk tray to slide. The second arc-shaped edge pushes against the second stopper of the fixed structure as the cover rotates, so that the base moves toward the connector, so that the hard disk in the hard disk tray is connected to the connector; when the hard disk tray is located in the hard disk rack When the cover body is turned up relative to the base on the track, the first arc-shaped edge of the side plate of the cover body pushes against the first stopper of the fixed structure as the cover body rotates, so that the base moves away from the connector, and Disengage the hard drive located in the hard drive tray directly from the connector on the hard drive cage.

Of course, the present invention can also have other various embodiments, without departing from the spirit and essence of the present invention, those skilled in the art can make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformation should belong to the protection scope of the claims of the present invention.

Claims (8)

1. A hard disk tray suitable for carrying a hard disk, the hard disk tray comprising:

the base comprises a bottom plate and two base side plates connected with the bottom plate; and

a cover body pivoted to the base and including a top plate and two cover body side plates connected to the top plate, wherein one of the cover body side plates and the corresponding base side plate includes a first fixing member which is telescopic, the other one includes a fixing hole corresponding to the first fixing member,

the hard disk is suitable for being positioned between the base and the cover body, when the cover body is closed on the base, the first fixing pieces extend into the corresponding fixing holes to fix the relative position of the cover body and the base,

when the cover body is turned over relative to the base, each first fixing piece retracts inwards along the wall surface of the fixing hole and exits from the corresponding fixing hole;

each first fixing piece comprises a shell of a concave hole, an elastic piece positioned in the concave hole and a ball connected with the elastic piece, wherein the ball is partially protruded out of the concave hole in a normal state and is suitable for being retracted into the concave hole when being pressed.

2. The hard disk tray according to claim 1, wherein the two base side plates respectively comprise a plurality of holes surrounding a plurality of cantilevers, the cantilevers respectively comprise a plurality of second fixing members protruding from an inner surface, the hard disk comprises a plurality of screw holes at both sides, and the second fixing members are adapted to extend into the screw holes of the hard disk when the hard disk is positioned in the hard disk tray.

3. The hard disk tray according to claim 1, wherein the bottom plate of the base includes a third fixing member, the hard disk includes a screw hole in a bottom surface, and the third fixing member is adapted to extend into the screw hole of the hard disk when the hard disk is positioned in the hard disk tray.

4. A hard disk carrier assembly adapted to carry a hard disk, the hard disk carrier assembly comprising:

a hard disk rack comprising:

a frame body;

a plurality of fixing structures arranged on the frame body to form a track, wherein at least one fixing structure comprises a first stop piece; and

the connector is configured on the frame body and is positioned at the tail end of the track; and

a hard disk tray detachably disposed on the fixing structures along the track, and comprising:

the base comprises a bottom plate and two base side plates connected with the bottom plate; and

a cover body pivoted to the base and including a top plate and two cover body side plates connected to the top plate, wherein at least one of the cover body side plates includes a first arc-shaped edge corresponding to the first stopper, one of each cover body side plate and the corresponding base side plate includes a first fixing member which is retractable, the other includes a fixing hole corresponding to the first fixing member,

the hard disk is suitable for being positioned between the base and the cover body, when the hard disk tray is positioned on the track of the hard disk frame and the cover body is closed on the base, the first arc-shaped edge of the side plate of the cover body is positioned beside the first stop piece of the fixing structure, and the first fixing pieces extend into the corresponding fixing holes to fix the relative position of the cover body and the base,

when the hard disk tray is positioned on the track of the hard disk frame and the cover body is turned over relative to the base, the first arc-shaped edge of the side plate of the cover body pushes against the first stop piece of the fixing structure along with the rotation of the cover body, so that the base moves in the direction away from the connector, and each first fixing piece retracts inwards along the wall surface of the fixing hole and exits from the corresponding fixing hole;

each first fixing piece comprises a shell with a concave hole, an elastic piece positioned in the concave hole and a ball connected with the elastic piece, wherein the ball is partially protruded out of the concave hole in a normal state and is suitable for being retracted into the concave hole when being pressed.

5. The hard disk carrier assembly as claimed in claim 4, wherein at least one of the fixing structures includes a second stopper, at least one of the cover side plates includes a second arc-shaped edge corresponding to the second stopper, when the cover is closed to the base, the second arc-shaped edge of the cover side plate pushes against the second stopper of the fixing structure along with the rotation of the cover, so as to move the base toward the connector.

6. The hard disk drive bracket assembly as claimed in claim 4, wherein the two base side plates respectively comprise a plurality of holes surrounding a plurality of cantilevers, the cantilevers respectively comprise a plurality of second fixing members protruding from the inner surface, the hard disk comprises a plurality of screw holes on both sides, and the second fixing members are adapted to extend into the screw holes of the hard disk when the hard disk is positioned in the hard disk tray.

7. The hard disk carrier assembly as recited in claim 4, wherein the bottom plate of the chassis includes a third fastener, the hard disk including a threaded hole in a bottom surface, the third fastener adapted to extend into the threaded hole of the hard disk when the hard disk is positioned in the hard disk tray.

8. The hard disk tray assembly of claim 4, wherein at least one of the chassis side plates includes a fourth fixing member protruding from an outer surface thereof, and at least one of the fixing structures includes a position-limiting portion corresponding to the fourth fixing member for limiting a position of the hard disk tray with respect to the hard disk rack.

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