Chassis and network video recorder

Abstract

The embodiments of the present disclosure provide a chassis and a network hard disk recorder, the chassis comprising: a chassis body, the depth of the chassis body is less than 350 mm, the chassis body is provided with a hanging ear for fixed connection to a cabinet, and the bottom of the interior of the chassis body is provided with a slide rail; a bottom box, the bottom of the exterior of the bottom box is configured to be compatible with the slide rail; a hard disk rack, the hard disk rack is installed above the bottom box and fixedly connected to the bottom box. Compared with the chassis in the prior art, the chassis provided by the embodiments of the present disclosure has a shorter depth and a higher height, and the bottom box and the hard disk rack fixedly connected to the bottom box can be pulled out of or pushed in from the chassis body like a drawer, so as to perform operations such as equipment maintenance or equipment replacement on the chassis. It can be seen that the chassis provided by the embodiments of the present disclosure is easier to install and maintain.

Description

Technical Field

[0001] The present disclosure relates to the technical field of servers, and in particular to a chassis and a network hard disk video recorder. Background Art

[0002] The chassis of a network video recorder (NVR) typically needs to be installed in a standard cabinet measuring 2000mm (height) x 600mm (width) x 600mm (depth). In existing technology, NVR chassis typically accommodate eight hard drives. Specifically, they consist of two four-slot hard drive racks stacked together and fixedly connected inside the chassis. The chassis also houses other components such as the motherboard and power supply. Therefore, sufficient space is required to accommodate these components. Typically, existing chassis are greater than 400mm deep.

[0003] However, due to the long depth of the chassis, when it is installed in the cabinet, it needs a matching tray or bracket to fix it, which makes the installation process more complicated and the installation cost is relatively high. In addition, in the existing technology, when performing wiring maintenance or subsequent repairs on the chassis, the operation can only be carried out at the back of the cabinet. According to the relevant specifications, the back of the cabinet needs to reserve a maintenance channel of about 800mm. During actual installation, the on-site environment often cannot meet such space requirements.

[0004] In summary, it can be seen that the chassis in the prior art is troublesome to install and inconvenient to maintain. Summary of the Invention

[0005] The purpose of the embodiments of the present disclosure is to provide a chassis and a network hard disk recorder to facilitate the installation and maintenance of the chassis. The specific technical solution is as follows:

[0006] A first aspect of an embodiment of the present disclosure provides a chassis, comprising: a box body, the depth of the box body being less than 350 mm, the box body being provided with hanging ears for fixedly connecting to a cabinet, and the bottom inside the box body being provided with slide rails; a bottom box, the bottom outside the bottom box being configured to be compatible with the slide rails; and a hard disk rack, the hard disk rack being installed above the bottom box and fixedly connected to the bottom box.

[0007] According to a chassis provided by an embodiment of the present disclosure, since the depth of its case is less than 350mm, its hard disk rack is installed above the bottom case and is fixedly connected to the bottom case, that is, the hard disk rack is installed stacked with the bottom case. It can be seen that compared with the chassis in the prior art, the chassis provided by the embodiment of the present disclosure has a shortened depth and increased height. When the overall chassis configuration remains unchanged, the center of the whole machine is closer to the front, so that the chassis can be fixedly installed in the cabinet through the hanging ears provided on the chassis body for fixed connection with the cabinet without being configured with a pallet or bracket; at the same time, since the bottom of the interior of the case is provided with a slide rail, and the bottom of the outside of the bottom case is configured to be compatible with the slide rail, the chassis provided by the embodiment of the present disclosure can be pulled out or pushed in from the case like a drawer, so as to perform equipment maintenance or equipment replacement operations on the chassis. It can be understood that there is no need to reserve a maintenance channel on the back side of the cabinet. In summary, compared with the prior art, the chassis provided by the embodiment of the present disclosure is easier to install and maintain.

[0008] In addition, a chassis provided according to an embodiment of the present disclosure may also have the following additional technical features:

[0009] In some embodiments of the present disclosure, a guide wheel adapted to the upper portion of the bottom box is provided on the side surface of the interior of the box.

[0010] In some embodiments of the present disclosure, a step column is provided at the rear end of the bottom inside the box body, and a guide groove adapted to the step column is provided at the rear end of the bottom outside the bottom box.

[0011] In some embodiments of the present disclosure, the hard disk rack includes: a mounting base, on which at least one hard disk mounting position is provided, the mounting base includes a base plate and a baffle provided at the rear of the base plate; and at least one hard disk fixing frame, the hard disk fixing frame being configured to fix the hard disk in a clamping manner, each of the hard disk fixing frames being correspondingly provided on one of the hard disk mounting positions, a base foot being provided at the bottom of the hard disk fixing frame, a slot hole for inserting the base foot extending in the front-to-back direction being provided on the base plate, a bite groove being formed on the rear side of the base foot, an elastic locking piece with a lock hole being provided at the rear of the hard disk fixing frame, and a protruding structure being provided on the top of the baffle; wherein, when the bite groove on the base foot of the hard disk fixing frame is engaged with the rear edge of the slot hole, the elastic locking piece is sleeved on the protruding structure through the lock hole and abuts against the rear side wall of the protruding structure.

[0012] In some embodiments of the present disclosure, the hard disk fixing frame includes a top plate, a first side plate and a second side plate, the first side plate and the second side plate are spaced apart and arranged in parallel, the first side plate and the second side plate are both connected to the top plate, and the first side plate, the second side plate and the top plate jointly define a rectangular hard disk accommodating cavity.

[0013] In some embodiments of the present disclosure, a first positioning column is provided on a side of the first side panel close to the second side panel, and a second positioning column is provided on a side of the second side panel close to the first side panel. The first positioning column and the second positioning column are configured to adapt to the positioning holes provided on both sides of the hard disk.

[0014] In some embodiments of the present disclosure, the chassis also includes a panel, which is arranged on the front side of the base box and has a wiring port, and a miniature cylinder lock adapted to the upper part of the front of the box body is provided on the upper part of the panel.

[0015] In some embodiments of the present disclosure, the chassis also includes a chassis cover, which is installed on the front side of the panel and is configured to be fixedly connected to the chassis body, and the chassis cover is provided with a cable outlet groove for leading the wiring of the wiring port to the cable organizer of the cabinet.

[0016] In some embodiments of the present disclosure, the panel is further provided with a ventilation hole group, and the chassis cover is further provided with an air guide baffle and a heat dissipation hole group adapted to the ventilation hole group.

[0017] A second aspect of the embodiments of the present disclosure provides a network hard disk video recorder, including the chassis provided by the first aspect of the embodiments of the present disclosure.

[0018] According to a network hard disk video recorder provided by an embodiment of the present disclosure, since the depth of its chassis is less than 350 mm, the hard disk rack is installed above the bottom box and fixedly connected to the bottom box, that is, the hard disk rack is stacked with the bottom box. It can be seen that compared with the network hard disk video recorder in the prior art, the network hard disk video recorder provided by the embodiment of the present disclosure has a shorter chassis depth and a higher height. When the overall chassis configuration remains unchanged, the center of the entire machine is closer to the front, so that the chassis can be fixedly installed in the cabinet by the hanging ears provided on the chassis body for fixed connection with the cabinet without being configured with a tray or bracket. At the same time, since the bottom of the inner part of the chassis is provided with a slide rail, and the bottom of the outer bottom of the bottom box is configured to be compatible with the slide rail, the network hard disk video recorder provided by the embodiment of the present disclosure can be pulled out or pushed in from the chassis body of the chassis like pulling a drawer, so that the chassis can be repaired or replaced. It can be understood that there is no need to reserve a maintenance channel at the back of the cabinet. In summary, compared with the prior art, the network hard disk video recorder provided by the embodiment of the present disclosure is easier to install and maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other embodiments can also be obtained based on these drawings.

[0020] Figure 1 A schematic structural diagram of a chassis provided in an embodiment of the present disclosure;

[0021] Figure 2 A schematic structural diagram of a chassis body provided in an embodiment of the present disclosure;

[0022] Figure 3 A schematic structural diagram of a bottom box of a chassis provided in an embodiment of the present disclosure;

[0023] Figure 4 A schematic structural diagram of a hard disk rack of a chassis provided in an embodiment of the present disclosure;

[0024] Figure 5 A schematic structural diagram of a hard disk fixing frame of a chassis provided in an embodiment of the present disclosure;

[0025] Figure 6 A schematic structural diagram of a hard disk fixing frame and a hard disk of a chassis provided in an embodiment of the present disclosure;

[0026] Figure 7 A schematic diagram of installing a hard disk rack of a chassis provided in an embodiment of the present disclosure;

[0027] Figure 8 A schematic structural diagram of a panel of a chassis provided in an embodiment of the present disclosure;

[0028] Figure 9 A schematic structural diagram of a chassis cover of a chassis provided in an embodiment of the present disclosure.

[0029] The symbols in the accompanying drawings represent the following:

[0030] 110—Box body; 1101—Mounting ear; 1102—Slide rail; 1103—Guide wheel; 1104—Step column; 1105—Panel mounting hole; 1106—Location piece;

[0031] 120—bottom box; 1201—guide wheel contact surface; 1202—guide groove; 1203—third positioning column;

[0032] 130—hard disk rack; 31—mounting seat; 32—hard disk fixing frame;

[0033] 311 - bottom plate; 312 - baffle; 313 - hard disk rack positioning hole; 314 - hard disk rack mounting hole;

[0034] 3121—raised structure;

[0035] 321 - bottom foot; 322 - elastic locking piece; 323 - top plate; 324 - first side plate; 325 - second side plate;

[0036] 3211—occlusal groove; 3221—locking hole; 3241—first positioning column; 3251—second positioning column;

[0037] 140—Panel; 1401—Micro-cylinder lock; 1402—Captive screw; 1403—Handle; 1404—Ventilation hole assembly;

[0038] 150—chassis cover; 1501—cable outlet trough; 1502—air guide baffle; 1503—heat dissipation hole group; 1504—positioning slot; 1505—magnetic suction cup;

[0039] 200—hard disk; 201—hard disk positioning hole;

[0040] 700—Cabinet. DETAILED DESCRIPTION

[0041] The following will be combined with the accompanying drawings in the embodiments of the present disclosure to clearly and completely describe the technical solutions in the embodiments of the present disclosure. Obviously, the embodiments described are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field based on the present disclosure are within the scope of protection of the present disclosure.

[0042] refer to Figure 1 As shown, the first aspect of the embodiment of the present disclosure provides a chassis, which may include: a box body 110, the depth of the box body 110 is less than 350 mm, the box body 110 is provided with a hanging ear 1101 for fixedly connected to the cabinet 700, and the bottom of the box body 110 is provided with a slide rail 1102; a bottom box 120, the bottom of the outside of the bottom box 120 is configured to be compatible with the slide rail 1102; and a hard disk rack 130, the hard disk rack 130 is installed above the bottom box 120 and is fixedly connected to the bottom box 120.

[0043] According to a chassis provided by an embodiment of the present disclosure, since the depth of its case body 110 is less than 350 mm, its hard disk rack 130 is installed above the bottom box 120 and is fixedly connected to the bottom box, that is, the hard disk rack 130 is stacked with the bottom box 120. It can be seen that compared with the chassis in the prior art, the chassis provided by the embodiment of the present disclosure has a shorter depth and an increased height. Under the condition that the overall chassis configuration remains unchanged, the center of the whole machine is closer to the front, so that the chassis can be fixed to the cabinet 700 through the chassis case body 110 without configuring a tray or bracket. The connected hanging ears 1101 are fixedly installed in the cabinet 700; at the same time, since the bottom of the interior of the box body 110 is provided with a slide rail 1102, and the bottom of the exterior of the bottom box 120 is configured to be compatible with the slide rail 1102, the chassis provided by the embodiment of the present disclosure can be pulled out of or pushed into the chassis body 110 like a drawer, so as to perform equipment maintenance or equipment replacement operations on the chassis. It can be understood that there is no need to reserve a maintenance channel on the rear side of the cabinet 700. In summary, compared with the prior art, the chassis provided by the embodiment of the present disclosure is easier to install and maintain.

[0044] In some embodiments of the present disclosure, the box body 110 may be made of sheet metal material, and the slide rail 1102 may be formed by bending the sheet metal material of the box body 110 , thereby reducing the friction force experienced by the bottom box 120 when sliding on the slide rail 1102 .

[0045] In some embodiments of the present disclosure, reference Figure 2 and Figure 3 As shown, the side surface of the interior of the case 110 can be provided with guide wheels 1103 that are adapted to the upper portion of the bottom case 120. By providing the guide wheels 1103, when the bottom case 120 and the hard disk rack 130 fixedly connected to the bottom case 120 need to be pushed into the case 110, the guide wheels 1103 can not only guide the advancement of the bottom case 120, but also limit the vertical displacement of the bottom case 120, so that the bottom case 120 can slide more smoothly on the slide rails 1102.

[0046] For example, the hard disk rack 130 can be fixedly installed on the front end part of the upper part of the bottom box 120, and the rear end part of the upper part of the bottom box 120 serves as the guide wheel contact surface 1201 that contacts the guide wheel 1103. The guide wheels 1103 are set on both sides of the inside of the box body 110 at positions that match the height of the bottom box 120 and the length of the guide wheel contact surface 1201. It can be understood that when it is necessary to push the bottom box 120 and the hard disk rack 130 fixedly connected to the bottom box 120 into the box body 110, the rear part of the bottom box 120 can be placed flat on the front opening of the box body 110 first, and then the bottom box 120 can be pushed inward along the bottom surface of the box body 110. After the guide wheel contact surface 1201 contacts the guide wheel 1103, the guide wheel 1103 applies a downward pressure on the guide wheel contact surface 1201, limiting the vertical displacement of the bottom box 120 to prevent the bottom box 120 from derailing and keep it moving along the bottom surface of the box body 110. At this time, the user can push the bottom box 120 into the box body 110 relatively easily.

[0047] In some embodiments of the present disclosure, reference Figure 2 and Figure 3 As shown, the rear end of the bottom of the box body 110 can be provided with a stepped column 1104, and the rear end of the bottom of the bottom box 120 can be provided with a guide groove 1202 that matches the stepped column 1104. When the rear portion of the bottom box 120 is pushed to the rear portion of the box body 110, the stepped column 1104 cooperates with the guide groove 1202 to position the bottom box 120 and limit the vertical displacement of the rear portion of the bottom box 120, thereby ensuring that the bottom box 120 is in a fixed position and remains stable without derailment each time it is installed.

[0048] In some embodiments of the present disclosure, reference Figure 4-Figure 6 As shown, the hard disk rack 130 may include: a mounting base 31 and at least one hard disk fixing frame 32. Furthermore, at least one hard disk mounting position may be provided on the mounting base 31, and the mounting base 31 may include a bottom plate 311 and a baffle 312 provided at the rear of the bottom plate 311; the hard disk fixing frame 32 may be configured to fix the hard disk 200 in a clamping manner, and each hard disk fixing frame 32 is correspondingly provided at a hard disk mounting position, and a foot 321 may be provided at the bottom of the hard disk fixing frame 32, and a slot extending in the front-to-back direction for inserting the foot 321 may be provided on the bottom plate 311, and an engaging groove 3211 is formed on the rear side of the foot 321, and an elastic locking piece 322 with a locking hole 3221 may be provided at the rear of the hard disk fixing frame 32, and a protruding structure 3121 may be provided on the top of the baffle 312. When the engagement groove 3211 on the bottom foot 321 of the hard disk fixing frame 32 engages with the rear edge of the slot, the elastic locking piece 322 is sleeved on the protruding structure 3121 through the locking hole 3221 and abuts against the rear side wall of the protruding structure 3121 .

[0049] When the hard disk 200 needs to be installed, the hard disk fixing frame 32 is removed from the mounting base 31, and the hard disk fixing frame 32 is used to clamp the hard disk 200. Then, the bottom foot 321 of the hard disk fixing frame 32 is inserted into the slot hole on the bottom plate 311 of the mounting base 31. At this time, the elastic locking piece 322 is placed on the protruding structure 3121. Then, the hard disk fixing frame 32 is pushed backward so that the engaging groove 3211 on the bottom foot 321 bites the rear edge of the slot hole. At this time, the elastic locking piece 322 bounces downward under the action of the toughness of the material, thereby using the locking hole 3221 to cover the protruding structure 3121, and then the protruding structure 3121 and the locking hole 3221 are engaged, and the hard disk 200 can be installed on the hard disk mounting position corresponding to the hard disk fixing frame 32. Conversely, when it is necessary to remove the hard disk 200, the elastic locking piece 322 is pushed upward to disengage the locking hole 3221 from the protruding structure 3121, and then the hard disk fixing frame 32 is pulled forward to disengage the engaging groove 3211 on the foot 321 from the rear edge of the slot. The hard disk fixing frame 32 is then removed from the mounting base 31, and the clamping effect of the hard disk fixing frame 32 on the hard disk 200 is released, and the hard disk 200 can be removed from the hard disk fixing frame 32. In summary, the installation and removal process of the hard disk 200 does not require the use of screws or other additional auxiliary accessories. It can be seen that compared with the prior art, the hard disk rack 130 provided by the embodiment of the present disclosure can make the disassembly and assembly of the hard disk simpler and faster.

[0050] Furthermore, the hard disk fixing frame 32 may include a top plate 323, a first side plate 324, and a second side plate 325. The first side plate 324 and the second side plate 325 are spaced apart and arranged in parallel. The first side plate 324 and the second side plate 325 are both connected to the top plate 323. The first side plate 324, the second side plate 325, and the top plate 323 together define a rectangular hard disk receiving cavity. Since the hard disk 200 is generally rectangular in shape, the rectangular hard disk receiving cavity defined in the present disclosure can be well adapted to the hard disk 200, thus avoiding space waste and also facilitating improved clamping stability of the hard disk 200.

[0051] Furthermore, a first positioning post 3241 can be provided on a side of the first side panel 324 proximate to the second side panel 325, and a second positioning post 3251 can be provided on a side of the second side panel 325 proximate to the first side panel 324. The first positioning post 3241 and the second positioning post 3251 are configured to mate with the hard drive positioning holes 201 provided on either side of the hard drive 200. In this way, the hard drive retaining frame 32 provides a multi-point support clamping method for the hard drive 200, which can achieve a more stable clamping method than a surface contact method. Furthermore, because the first positioning post 3241 and the second positioning post 3251 both fit within the hard drive positioning holes 201 on the hard drive 200, the position of the hard drive 200 within the hard drive retaining frame 32 remains fixed, thereby ensuring that the hard drive 200 is in a fixed position each time it is installed, thereby improving installation reliability.

[0052] In some embodiments of the present disclosure, reference Figure 7 As shown, the upper part of the bottom box 120 can be provided with a third positioning column 1203, the mounting base 31 can be provided with a hard disk rack positioning hole 313 compatible with the third positioning column 1203, and the mounting base 31 can also be provided with a hard disk rack mounting hole 314. The mounting base 31 is fixedly installed on the upper part of the bottom box 120 by screws passing through the hard disk rack mounting hole 314, so that the hard disk rack 130 is fixedly connected to the bottom box 120.

[0053] In some embodiments of the present disclosure, reference Figure 7 and Figure 8 As shown, the chassis may further include a panel 140, which is disposed on the front side of the base box 120 and is provided with a wiring port so that the user can perform wiring operations on the front side of the chassis. Compared with the prior art which requires reserving space on the rear side of the chassis for wiring operations, the present disclosure can save space occupied by the chassis installation.

[0054] Furthermore, a micro-cylinder lock 1401 that is compatible with the upper part of the front part of the box body 110 can be provided on the upper part of the panel 140. When the rear part of the bottom box 120 is pushed to the rear part of the box body 110, the micro-cylinder lock 1401 provided on the panel 140 can be rotated to engage with the upper part of the front part of the box body 110 to fix the bottom box 120 and prevent the bottom box 120 from sliding out of the box body 110.

[0055] Furthermore, a captive screw 1402 can be provided on the panel 140, and a panel mounting hole 1105 compatible with the captive screw 1402 can be provided on the box body 110, so that the panel 140 can be more firmly fixed to the box body 110 by utilizing the cooperation between the captive screw 1402 and the panel mounting hole 1105 and tightening the captive screw 1402, thereby enhancing the assembly reliability of the bottom box 120.

[0056] Furthermore, a handle 1403 may be provided on the panel 140 so that the user can pull the panel 140 to pull the bottom box 120 and the hard disk rack 130 fixedly connected to the bottom box 120 out of the box body 110.

[0057] In some embodiments of the present disclosure, reference Figure 9 As shown, the chassis may further include a chassis cover 150, which is mounted on the front side of the panel 140 and is configured to be fixedly connected to the chassis body 110. The chassis cover may be provided with a cable outlet trough 1501 for leading the wiring of the wiring port to the cable organizer in the cabinet 700. When the chassis does not need to be operated, the chassis cover 150 is mounted on the front side of the panel 140. On the one hand, it can protect the chassis panel 140, and on the other hand, it can also hide the chassis wiring, thereby enhancing the overall aesthetics of the chassis.

[0058] Furthermore, the panel 140 may be provided with a ventilation hole group 1404, and the chassis cover 150 may be provided with an air guide baffle 1502 and a heat dissipation hole group 1503 that are compatible with the ventilation hole group 1404. For example, the air guide baffle 1502 and the three surrounding edges of the chassis cover 150 may form a rectangular window. After the chassis cover 150 is aligned with the panel, the rectangular window is precisely buckled onto the ventilation hole group 1404 of the panel 140. In this case, the rectangular window formed by the air guide baffle 1502 and the three surrounding edges of the chassis cover 150 can effectively guide the hot air blown out of the ventilation hole group 1404 to the heat dissipation hole group 1503 provided on the chassis cover 150, allowing the hot air to dissipate from the heat dissipation hole group 1503.

[0059] Furthermore, the chassis cover 150 may also be provided with a positioning groove 1504, and the box body 110 may also be provided with a positioning piece 1106 adapted to the positioning groove 1504. During installation, the positioning groove 1504 provided on the chassis cover 150 is aligned with the positioning piece 1106 provided on the box body 110. The positioning of the chassis cover 150 can be achieved through the cooperation of the positioning groove 1504 and the positioning piece 1106, so that the chassis cover 150 can be more accurately aligned with the panel 140 fixedly installed on the box body 110.

[0060] Furthermore, the ear 1101 of the box body 110 can be made of magnetic metal, and the chassis cover 150 can be provided with a magnetic suction cup 1505. In this way, when the positioning groove 1504 provided on the chassis cover 150 is aligned with the positioning piece 1106 provided on the box body 110, the chassis cover 150 is brought close to the box body 110. Under the adsorption action of the magnetic suction cup 1505 and the ear 1101, the chassis cover 150 can be fixedly connected to the box body 110, and installation and disassembly are relatively convenient.

[0061] A second aspect of the embodiments of the present disclosure provides a network hard disk video recorder, which may include the chassis provided by the first aspect of the embodiments of the present disclosure.

[0062] According to a network hard disk video recorder provided by an embodiment of the present disclosure, since the depth of the case body 110 of the case is less than 350 mm, the hard disk rack 130 is installed above the bottom box 120 and is fixedly connected to the bottom box, that is, the hard disk rack 130 is installed stacked with the bottom box 120. It can be seen that compared with the network hard disk video recorder in the prior art, the network hard disk video recorder provided by the embodiment of the present disclosure has a shorter chassis depth and an increased height. Under the condition that the overall chassis configuration remains unchanged, the center of the whole machine is further forward, so that the chassis can be connected to the cabinet 70 through the chassis body 110 provided with a bracket without configuring a bracket or a support. 0 fixedly connected to the mounting ears 1101 is fixedly installed in the cabinet 700; at the same time, because the bottom of the inner part of the case body 110 of the chassis is provided with a slide rail 1102, and the bottom of the outer part of the bottom box 120 is configured to be compatible with the slide rail 1102, the network hard disk video recorder provided by the embodiment of the present disclosure can be pulled out of or pushed into the case body 110 of the chassis like a drawer, so as to perform equipment maintenance or equipment replacement operations on the chassis. It can be understood that there is no need to reserve a maintenance channel on the rear side of the cabinet 700. In summary, compared with the existing technology, the network hard disk video recorder provided by the embodiment of the present disclosure is easier to install and maintain.

[0063] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0064] The various embodiments of the present disclosure are described in a related manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0065] The above description is only a preferred embodiment of the present disclosure and is not intended to limit the scope of protection of the present disclosure. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present disclosure are included in the scope of protection of the present disclosure.

Claims

1. A chassis, characterized in that: include: A box body, the depth of which is less than 350 mm, the box body being provided with hanging ears for fixed connection with the cabinet, and the bottom of the box body being provided with a slide rail; A bottom box, the bottom of the bottom box being configured to fit with the slide rail; A hard disk rack, which is installed above the bottom box and fixedly connected to the bottom box; The hard disk rack includes: A mounting base, on which at least one hard disk mounting position is provided, the mounting base comprising a bottom plate and a baffle provided at the rear of the bottom plate; and At least one hard disk fixing frame, the hard disk fixing frame being configured to fix the hard disk in a clamping manner, each hard disk fixing frame being correspondingly disposed on one of the hard disk mounting positions, a foot being disposed at the bottom of the hard disk fixing frame, a slot being disposed on the bottom plate extending in a front-to-rear direction for inserting the foot, a snap-fitting slot being formed on the rear side of the foot, an elastic locking piece with a locking hole being disposed at the rear of the hard disk fixing frame, and a protruding structure being disposed on the top of the baffle; Wherein, when the engaging groove on the base of the hard disk fixing frame engages with the rear edge of the slot hole, the elastic locking piece is sleeved on the protruding structure through the locking hole and abuts against the rear side wall of the protruding structure.

2. The chassis according to claim 1, wherein: The side surface inside the box body is provided with a guide wheel adapted to the upper part of the bottom box.

3. The chassis according to claim 2, characterized in that A step column is provided at the rear end of the bottom inside the box body, and a guide groove adapted to the step column is provided at the rear end of the bottom outside the bottom box.

4. The chassis according to claim 1, wherein: The hard disk fixing frame includes a top plate, a first side plate and a second side plate. The first side plate and the second side plate are spaced apart and arranged in parallel. The first side plate and the second side plate are both connected to the top plate. The first side plate, the second side plate and the top plate jointly define a rectangular hard disk accommodating cavity.

5. The chassis according to claim 4, characterized in that: A first positioning column is provided on a side of the first side plate close to the second side plate, and a second positioning column is provided on a side of the second side plate close to the first side plate. The first positioning column and the second positioning column are configured to adapt to the positioning holes provided on both sides of the hard disk.

6. The chassis according to claim 1, wherein: The chassis also includes a panel, which is arranged on the front side of the bottom box and is provided with a wiring port. A miniature cylinder lock adapted to the upper part of the front of the box body is arranged on the upper part of the panel.

7. The chassis according to claim 6, characterized in that The chassis also includes a chassis cover, which is installed on the front side of the panel and is configured to be fixedly connected to the box body. The chassis cover is provided with a wire outlet groove for leading the wires of the wiring port to the wire organizer of the cabinet.

8. The chassis according to claim 7, characterized in that: The panel is further provided with a ventilation hole group, and the chassis cover is further provided with an air guide baffle and a heat dissipation hole group adapted to the ventilation hole group.

9. A network video recorder, characterized in that: Comprising the chassis according to any one of claims 1 to 8.

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