Hard disk video recorder

Abstract

The utility model provides a hard disk video recorder, which comprises a case, a sliding locking structure and a panel shell, a hanging lug structure used for limiting and installing the panel shell is arranged at an opening in the front side of the case, and the sliding locking structure comprises a sliding assembly and a locking assembly which are arranged in the panel shell. The sliding assembly is provided with a first switching end and a limiting end which are oppositely arranged in the sliding direction of the sliding assembly, and the first switching end is connected with the hanging lug structure. The locking assembly is movably arranged and provided with a locking end, the panel shell is installed at the front side opening of the case in a locked mode under the condition that the locking end moves to be matched with the limiting end in a limiting mode, and the sliding assembly can slide to separate the first switching end from the hanging lug structure under the condition that the locking end is separated from the limiting end. According to the technical scheme provided by the utility model, the locking assembly and the sliding assembly are separately arranged, so that the structural strength is improved and the service life is prolonged on the basis of ensuring the disassembly and assembly reliability, and the reliability and the stability of mounting and locking the panel shell are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of hard disk video recorders, in particular to a hard disk video recorder. Background Art

[0002] In the prior art, the panel shell of the hard disk recorder needs to be disassembled and assembled to install, replace or maintain the hard disk. The disassembly and assembly structure of the panel shell is generally fixed by all screws or screws and buckles, but this is usually a multi-point installation, and the single disassembly and assembly of the panel shell is cumbersome and difficult; the prior art also adopts a rotating installation method, but the structure is complex and the precision requirements are high, resulting in a relatively high processing and manufacturing cost of the panel shell of the hard disk recorder;

[0003] There are also methods of fixing with locks in the related technologies. For example, only the lock is used to simultaneously install and lock the panel shell, or the lock is used to drive the movement of the structure used to transfer and install the panel shell to install and lock the panel shell. Although this installation method improves the efficiency of disassembly and assembly of the panel shell, the durability of the lock tongue of the lock will decrease and the rotation angle will become larger, which may easily cause looseness during installation, resulting in unreliable installation or unreliable adjustment of the sliding part. In addition, the method of installing the panel shell by driving the structure to move with the lock converts the rotational force into other forces such as driving force. The force loss during the conversion process is large, and the force required for disassembly and assembly is also large. Utility Model Content

[0004] The utility model provides a hard disk video recorder to improve the reliability and stability of the installation and locking of a panel shell in the prior art.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a hard disk video recorder, including a chassis, a sliding locking structure and a panel shell, the front opening of the chassis has a hanging ear structure for limiting the installation of the panel shell, the sliding locking structure includes a sliding component and a locking component arranged in the panel shell, the sliding component has a first adapter end and a limiting end relatively arranged along its sliding direction, the first adapter end is connected to the hanging ear structure; the locking component is movably arranged and has a locking end, when the locking end moves to limit the cooperation with the limiting end, the panel shell is locked and installed at the front opening of the chassis, when the locking end is separated from the limiting end, the sliding component can slide to separate the first adapter end and the hanging ear structure.

[0006] Furthermore, the sliding assembly includes a sliding unlocking member and a limit protrusion, a limit seat and a stop seat connected in sequence along the sliding direction. The limit seat is limitedly installed in the chassis, and the two ends of the limit protrusion and the stop seat that are opposite to each other form a first transfer end and a locking end respectively. The front side of the panel shell has an installation opening extending along the sliding direction of the sliding assembly. The sliding unlocking member can be slidably arranged at the installation opening and connected to the limit seat.

[0007] Further, the sliding direction of the sliding component, the extending direction of the limiting protrusion, and the length direction of the panel housing are all parallel to the length direction of the panel housing. The sliding component includes a plurality of limiting protrusions, and the plurality of limiting protrusions are arranged on the limiting seat at intervals along the width direction and / or the height direction of the panel housing.

[0008] Further, the sliding locking structure further includes a guiding and limiting component arranged inside the panel housing. The guiding and limiting component has a first stop end and a second stop end arranged oppositely in the sliding direction of the sliding component. The limiting seat has a limiting plate arranged perpendicular to the sliding direction. The first stop end and the second stop end are respectively located on both sides of the limiting plate. The first stop end is fixedly connected to the inner side of the side wall of the first adapter end protruding from the panel housing. One side of the limiting plate is in stop cooperation with the first stop end, and the other side of the limiting plate is in stop cooperation with the second stop end.

[0009] Further, the guiding and limiting component includes a mounting seat, a guiding post, and a spacer screw connected in sequence along the sliding direction of the sliding component. The extending direction of the guiding post is parallel to the sliding direction of the sliding component. The guiding post is slidably passed through the limiting plate and is in limiting cooperation with the limiting plate. The mounting seat and the spacer screw are respectively located on both sides of the limiting plate. One side of the mounting seat facing the guiding post forms the first stop end, and one side of the spacer screw facing the guiding post forms the second stop end.

[0010] Further, the sliding locking structure further includes an elastic member, and both ends of the elastic member are respectively abutted against the limiting plate and the second stop end.

[0011] Further, the sliding direction of the sliding component is parallel to the length direction of the front opening of the chassis. The hanging ear structure includes a first hanging ear and a second hanging ear. The first hanging ear and the second hanging ear are arranged on both sides of the chassis along the length direction of the front opening of the chassis. The first hanging ear and the second hanging ear are respectively in limiting cooperation with the two side walls in the length direction of the panel housing. In the sliding direction of the sliding locking structure, one side wall of the panel housing is connected to the first hanging ear through the sliding locking structure, and / or, the other side wall of the panel housing is connected to the second hanging ear through the sliding locking structure.

[0012] Further, one side wall of the panel housing is connected to the first hanging ear through the sliding locking structure. A panel side convex is provided on the side wall of the panel housing in limiting cooperation with the second hanging ear. The first hanging ear and the second hanging ear have hanging ear side grooves respectively used for passing through the first adapter end and the panel side convex. A panel groove for passing through the first adapter end is opened on the side wall of the panel housing in limiting cooperation with the first hanging ear. The panel side convex is detachably clamped with the hanging ear side groove of the second hanging ear.

[0013] Further, the locking assembly includes a locking tongue and a lock disposed on the panel housing. The lock core of the lock is rotatably disposed within the panel housing. The locking tongue is fixedly sleeved on the outer periphery of the lock core. The lock has a keyhole for rotating the lock core and the locking tongue by a matching key; one end of the locking tongue away from the center of the lock core forms a locking end.

[0014] Further, the DVR further includes an alarm module. The alarm module has a tactile switch disposed within the ear structure. The tactile switch is electrically connected to the alarm module. The first transfer end is separably in contact with the tactile switch. When the first transfer end is separated from the tactile switch, the alarm module gives an alarm.

[0015] Further, the DVR further includes an alarm module. The alarm module has a tactile switch disposed within the ear structure. The ear structure includes a first ear and a second ear disposed on both sides of the front opening of the chassis along the length direction of the front opening of the chassis. The panel housing has a second transfer end. The first transfer end extends into the first ear, and the second transfer end correspondingly extends into the second ear to snap-fit the panel housing at the front opening of the chassis; a tactile switch is disposed within both the first ear and the second ear. The first transfer end is separably in contact with the tactile switch within the first ear, and the second transfer end is separably in contact with the tactile switch within the second ear. When the first transfer end is separated from the tactile switch and the second transfer end is separated from the tactile switch, the alarm module gives an alarm.

[0016] Further, the DVR further includes a main power supply disposed within the chassis and an auxiliary power supply disposed within the ear structure. Both the main power supply and the auxiliary power supply are electrically connected to the alarm module.

[0017] Further, the interior of the chassis is divided into a main control area, a power supply area, and a hard disk area. There is an air guiding duct within the chassis. The air guiding duct flows through the main control area, the power supply area, and the hard disk area. Air inlets communicating with the air guiding duct are disposed on the side walls of the main control area, the power supply area, and the hard disk area. An air outlet is disposed on the side wall of the chassis. The DVR further includes a fan assembly disposed at the air outlet. The fan assembly is used to form an air flow flowing from multiple air inlets to the air outlet within the air guiding duct.

[0018] Further, the hard disk area includes a transfer area and an installation area formed by multiple hard disk slides. The DVR further includes multiple hard disks, a main control PCB, a power transfer PCB, an ear PCB, a central transfer PCB, and a main power supply. The multiple hard disks are respectively and pluggably disposed within the multiple hard disk slides. The main control PCB is disposed within the main control area. The power transfer PCB and the main power supply are disposed within the power supply area. The ear PCB is disposed within the ear structure. The central transfer PCB is disposed within the transfer area. The main control PCB and the central transfer PCB are powered by the main power supply through the power transfer PCB. The central transfer PCB is electrically connected to the ear PCB through a flexible PCB line.

[0019] Further, the ear-hanging structure includes a first ear-hanging part and a second ear-hanging part with the same structure. The first ear-hanging part or the second ear-hanging part includes an ear-hanging seat, an ear-hanging PCB, and a non-loosening screw. The ear-hanging seat has a PCB area and a transfer and adjustment area. The ear-hanging PCB is arranged in the PCB area. The transfer and adjustment area has a rotating plate that is rotatably opened and closed through a torsion spring and a pin shaft to open or block the transfer and adjustment area. The non-loosening screw is rotatably arranged in the transfer and adjustment area to transfer the chassis onto the cabinet.

[0020] Applying the technical solution of the present utility model, there is provided a digital video recorder, including a chassis, a sliding locking structure, and a panel shell. An ear-hanging structure for limiting and installing the panel shell is provided at the front opening of the chassis. The sliding locking structure includes a sliding component and a locking component arranged in the panel shell. The sliding component has a first transfer end and a limiting end arranged oppositely along its sliding direction. The first transfer end is connected to the ear-hanging structure. The locking component has a locking end with adjustable position. When the locking end is in limiting cooperation with the limiting end, the panel shell is tightly locked and installed at the front opening of the chassis. When the locking end is separated from the limiting end, the sliding component can slide to separate the first transfer end and the ear-hanging structure.

[0021] With this solution, the installation of the panel housing is guided through the ear-hanging structure, facilitating the quick positioning and installation of the panel housing. The position of the first adapter is adjusted by the movement of the sliding component within the panel housing, and then the quick disassembly and assembly of the panel housing are achieved through the connection or separation of the first adapter and the ear-hanging structure, which is conducive to improving the disassembly and assembly efficiency. The locking end of the locking component abuts against the limiting end of the sliding component to achieve adjustable locking of the sliding component. Specifically, when it is not necessary to disassemble the sliding component, the installation of the panel housing needs to be locked. At this time, the operator can adjust the locking end to a state where it abuts against the limiting end, making the sliding component unable to move into the panel housing, so that the first adapter is always connected to the ear-hanging structure. When it is necessary to disassemble the panel housing, the operator can adjust the locking end to separate it from the limiting end. During the adjustment process, the locking end will give way to a disassembly and assembly gap for the sliding component to move into the box. Then, the operator adjusts the sliding component to slide inward and separates the first adapter from the ear-hanging structure, thereby achieving the disassembly of the panel housing. Compared with the method of using fastening components such as screws and bolts to install the panel housing at multiple points in the prior art, the disassembly and assembly of the panel housing in this solution are more convenient; compared with the method of directly installing the panel housing through a lock in some cases and the method of installing through the linkage of a lock and a sliding part in some cases, this solution avoids the problem that when directly installing and locking the panel housing with a locking component or jointly installing the panel housing with a linked locking component and sliding component in the related art, due to the over-concentration of functions, both the locking and installation effects will decline synchronously over time, and it is extremely likely to lead to unreliable installation. The locking component and the sliding component in this solution are separately arranged, which is conducive to improving the structural strength and service life on the basis of ensuring the reliability of disassembly and assembly. Moreover, the separate arrangement can also avoid the loss of force caused by the linkage of the locking component and the sliding component, dispersing the force required for installation and the force required for locking, and improving the convenience of adjustment. With such a setting, while achieving the quick disassembly and assembly of the panel housing, it is also possible to achieve anti-disassembly locking of the panel housing, ensuring the reliability and stability of the installation of the panel housing and improving the anti-theft performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The schematic diagrams in the specification, which form a part of this application, are used to provide a further understanding of the present utility model. The illustrative embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the drawings:

[0023] Figure 1 shows the schematic structural diagram of the digital video recorder provided by the embodiment of the present utility model;

[0024] Figure 2 shows Figure 1 the exploded view of the digital video recorder;

[0025] Figure 3 showsFigure 1 Exploded view of the front panel housing, hanging ear structure and sliding locking structure of a hard disk video recorder;

[0026] Figure 4 Shows Figure 1 Schematic diagram of the internal structure of the front panel housing of a hard disk video recorder;

[0027] Figure 5 Shows Figure 4 Schematic diagram of the sliding locking structure in the locked state in

[0028] Figure 6 Shows Figure 4 Schematic diagram of the sliding locking structure in the unlocked state in

[0029] Figure 7 Shows Figure 4 Schematic diagram of the sliding locking structure in the disassembly and assembly state in

[0030] Figure 8 Shows Figure 1 Internal cross-sectional view of a hard disk video recorder;

[0031] Figure 9 Shows Figure 8 Partial enlarged view of

[0032] Figure 10 Shows Figure 1 Enlarged view of a hard disk video recorder at the first hanging ear;

[0033] Figure 11 Shows Figure 1 Schematic diagram of the internal structure of the hanging ear structure;

[0034] Figure 12 Shows Figure 1 Partial cross-sectional view of a hard disk video recorder in the locked state.

[0035] Among them, the above-mentioned drawings include the following reference numerals:

[0036] 10, chassis; 101, main control area; 102, power supply area; 103, hard disk area; 1031, transfer area; 1032, installation area; 10321, hard disk slide; 105, air inlet; 106, air outlet; 107, chassis side port; 11, hanging ear structure; 111, first hanging ear; 112, second hanging ear; 1101, hanging ear side groove; 113, hanging ear seat; 1131, PCB area; 1132, transfer adjustment area; 114, non-loosening screw; 115, torsion spring; 116, pin shaft; 117, rotating plate; 118, first buckle; 119, second buckle; 12, upper cover; 13, power supply box bracket; 14, hard disk bracket;

[0037] 20. Sliding locking structure; 21. Sliding component; 211. Sliding unlocking member; 212. Limiting protrusion; 213. Limiting seat; 2131. Limiting plate; 214. Stopping seat; 2101. First transfer end; 2102. Limiting end; 22. Locking component; 2201. Locking end; 221. Lock tongue; 222. Lock; 2221. Keyhole; 23. Guiding and limiting component; 2301. First stopping end; 2302. Second stopping end; 231. Mounting seat; 232. Guiding column; 233. Spacer screw; 24. Elastic member;

[0038] 30. Panel shell; 301. Mounting opening; 302. Panel side convex; 303. Panel groove;

[0039] 40. Alarm module; 41. Tactile switch;

[0040] 51. Main power supply;

[0041] 60. Fan assembly;

[0042] 71. Hard disk; 72. Main control PCB; 73. Power transfer PCB; 74. Hanging ear PCB; 75. Central transfer PCB; 76. Flexible PCB line; 771. Wiring seat; 772. Hard disk socket;

[0043] 80. Key. Detailed implementation manners

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way restrictive of the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0045] Such as Figures 1 to 12As shown in the figure, an embodiment of the present utility model provides a digital video recorder, which includes a chassis 10, a sliding locking structure 20 and a panel housing 30. The front side opening of the chassis 10 is provided with a lug structure 11 for limiting and installing the panel housing 30. The sliding locking structure 20 includes a sliding component 21 and a locking component 22 arranged in the panel housing 30. The sliding component 21 has a relatively arranged first transfer end 2101 and a limiting end 2102 along its sliding direction. The first transfer end 2101 is connected to the lug structure 11. The locking component 22 is movably arranged and has a locking end 2201. When the locking end 2201 moves to be in limiting cooperation with the limiting end 2102, the panel housing 30 is locked and installed at the front side opening of the chassis 10. When the locking end 2201 is separated from the limiting end 2102, the sliding component 21 can slide to separate the first transfer end 2101 and the lug structure 11.

[0046] With this solution, the installation of the panel housing 30 is guided through the ear-hanging structure 11, facilitating the quick positioning and installation of the panel housing 30. The position of the first adapter end 2101 is adjusted by the movement of the sliding component 21 within the panel housing 30. Furthermore, the quick disassembly and assembly of the panel housing 30 are achieved by the connection or separation of the first adapter end 2101 and the ear-hanging structure 11, which is conducive to improving the disassembly and assembly efficiency. The locking end 2201 of the locking component 22 abuts against and stops the limiting end 2102 of the sliding component 21, thereby realizing the adjustable locking of the sliding component 21. Specifically, when it is not necessary to disassemble the sliding component 21, the installation of the panel housing 30 needs to be locked. At this time, the operator can adjust the locking end 2201 to a state where it abuts against the limiting end 2102, making the sliding component 21 unable to move into the panel housing 30, so that the first adapter end 2101 always remains connected to the ear-hanging structure 11. When it is necessary to disassemble the panel housing 30, the operator can adjust the locking end 2201 to separate it from the limiting end 2102. During the adjustment process, the locking end 2201 will yield a disassembly and assembly gap for the sliding component 21 to move inward. Then, the operator adjusts the sliding component 21 to slide inward and separates the first adapter end 2101 from the ear-hanging structure 11, thereby realizing the disassembly of the panel housing 30. Compared with the prior art method of using fastening components such as screws and bolts to install the panel housing 30 at multiple points, this solution is more convenient for the disassembly and assembly of the panel housing 30. Compared with some methods of directly installing the panel housing 30 through locks and some methods of installing through the linkage of locks and sliding parts, this solution avoids the problem that when directly installing and locking the panel housing with a locking component or jointly installing the panel housing with a linked locking component and sliding component in the related art, due to the over-concentration of functions, the locking and installation effects will decline synchronously over time, and it is extremely easy to lead to unreliable installation. In this solution, the locking component 22 and the sliding component 21 are separately arranged, which is conducive to improving the structural strength and service life on the basis of ensuring the reliability of disassembly and assembly. Moreover, the separate arrangement can also avoid the loss of force caused by the linkage of the locking component and the sliding component, dispersing the force required for installation and the force required for locking, and improving the convenience of adjustment. With such a setting, while achieving the quick disassembly and assembly of the panel housing 30, it is also possible to achieve the anti-disassembly locking of the panel housing 30, ensuring the reliability and stability of the installation of the panel housing 30 and improving the anti-theft performance.

[0047] It should be noted that in this embodiment, the side of the panel housing 30 for inserting the hard disk 71 is the front side of the chassis 10.

[0048] Such as Figures 1 to 7As shown in the figure, the sliding component 21 includes a sliding unlocking member 211, and a limiting protrusion 212, a limiting seat 213, and a stop seat 214 that are sequentially connected along the sliding direction. The limiting seat 213 is installed in the chassis 10 in a limited manner. The two ends of the limiting protrusion 212 and the stop seat 214 facing away from each other respectively form a first transfer end 2101 and a locking end 2201. The front side of the panel shell 30 has an installation opening 301 extending along the sliding direction of the sliding component 21. The sliding unlocking member 211 is slidably arranged at the installation opening 301 and is connected to the limiting seat 213.

[0049] In this embodiment, a guiding strip group is provided inside the front side of the panel shell 30. The guiding strip group is used to guide and limit the sliding of the limiting seat 213, ensuring the reliability and stability of the limited installation and sliding adjustment of the sliding component 21. The sliding unlocking member 211 and the limiting seat 213 are fixedly connected by fastening components such as screws. The sliding unlocking member 211 protrudes from the installation opening 301. When an operator needs to adjust the sliding component 21, the operator only needs to correspondingly adjust the sliding unlocking member 211, which is convenient for the operator to perform the overall sliding adjustment of the sliding component 21. Further, by providing the limiting protrusion 212 and the stop seat 214, it is convenient to form the first transfer end 2101 and the limiting end 2102.

[0050] It can be understood that the sliding distance of the sliding unlocking member 211 in the installation opening 301 is greater than or equal to the length of the disassembly and assembly gap in the sliding direction. The length of the disassembly and assembly gap in the sliding direction needs to be greater than or equal to the distance required for the first transfer end 2101 to be disengaged from the hanging ear structure 11 to ensure the reliability and stability of unlocking.

[0051] Specifically, the sliding direction of the sliding component 21, the extending direction of the limiting protrusion 212, and the length direction of the panel shell 30 are all parallel to the length direction of the panel shell 30. The sliding component 21 includes a plurality of limiting protrusions 212, and the plurality of limiting protrusions 212 are arranged at intervals on the limiting seat 213 along the width direction and / or the height direction of the panel shell 30.

[0052] In this embodiment, the sliding component 21 has two limiting protrusions 212, and the two limiting protrusions 212 are arranged at intervals on the limiting seat 213 along the height direction of the panel shell 30. Such a setting is beneficial to improving the stability and reliability of the connection between the panel shell 30 and the chassis 10 and enhancing the connection strength.

[0053] Such as Figures 3 to 7As shown, the sliding locking structure 20 further includes a guiding and limiting component 23 disposed within the panel housing 30. The guiding and limiting component 23 has a first stop end 2301 and a second stop end 2302 that are oppositely arranged in the sliding direction of the sliding component 21. The limiting seat 213 has a limiting plate 2131 disposed perpendicular to the sliding direction. The first stop end 2301 and the second stop end 2302 are respectively located on both sides of the limiting plate 2131. The first stop end 2301 is fixedly connected to the inner side of the side wall of the first transfer end 2101 protruding from the panel housing 30. One side of the limiting plate 2131 is in stop cooperation with the first stop end 2301, and the other side of the limiting plate 2131 is in stop cooperation with the second stop end 2302.

[0054] With such an arrangement, the sliding range of the sliding component 21 within the panel housing 30 is limited by the first stop end 2301 and the second stop end 2302 of the guiding and limiting component 23, avoiding the situation where the limiting protrusion 212 of the sliding component 21 extends too deep into the hanging ear structure 11, or the entire sliding component 21 moves too deep into the interior of the panel housing 30, which may easily interfere with or damage other structures inside the hanging ear structure 11 or the interior of the panel housing 30. At the same time, the situation where the limiting protrusion 212 of the sliding component 21 completely retracts into the panel housing 30 is avoided.

[0055] Specifically, the guiding and limiting component 23 includes a mounting seat 231, a guiding post 232, and a gasket screw 233 that are sequentially connected along the sliding direction of the sliding component 21. The extending direction of the guiding post 232 is parallel to the sliding direction of the sliding component 21. The guiding post 232 is slidably passed through the limiting plate 2131 and is in limiting cooperation with the limiting plate 2131. The mounting seat 231 and the gasket screw 233 are respectively located on both sides of the limiting plate 2131. One side of the mounting seat 231 facing the guiding post 232 forms the first stop end 2301, and one side of the gasket screw 233 facing the guiding post 232 forms the second stop end 2302.

[0056] In this embodiment, the mounting seat 231 is fixedly disposed on the inner wall of the panel housing 30 and is fixedly connected with the gasket screw 233 through the guiding post 232, that is, the position of the guiding and limiting component 23 within the panel housing 30 is fixed. The limiting plate 2131 of the limiting seat 213 is located therebetween and is in stop cooperation with the two opposite end faces (i.e., the first stop end 2301 and the second stop end 2302), realizing the limitation of the position of the limiting plate 2131 in the sliding direction. By providing the limiting plate 2131, it is convenient for the installation of the limiting protrusion 212, which is beneficial to adjusting the installation position of the limiting protrusion 212 according to the actual situation. At the same time, through the limiting cooperation between the limiting plate 2131 and the guiding post 232, it is beneficial to further guide the sliding of the sliding component 21, ensuring the reliability and stability of sliding unlocking. Further, by providing the mounting seat 231 and the gasket screw 233, it is convenient for the formation of the first stop end 2301 and the second stop end 2302.

[0057] As shown Figures 1 to 7 in FIG. 3, the locking assembly 22 includes a locking tongue 221 and a lock 222 disposed on the panel housing 30. The lock core of the lock 222 is rotatably disposed within the panel housing 30. The locking tongue 221 is fixedly sleeved on the outer periphery of the lock core. The lock 222 has a keyhole 2221 for rotating the lock core and the locking tongue 221 by a matching key 80. One end of the locking tongue 221 away from the center of the lock core forms a locking end 2201.

[0058] With this arrangement, by inserting the corresponding key 80 and rotating it, the rotational adjustment of the locking end 2201 can be achieved, and further the stop adjustment of the locking end 2201 to the limiting end 2102 can be realized. Compared with the method of directly installing the lock 222 on the panel housing 30 and the method of installing through the linkage between the lock 222 and the sliding assembly 21, in this solution, the locking assembly 22 and the sliding assembly 21 are separately arranged on the basis of ensuring the convenient disassembly and assembly of the panel housing 30, which is beneficial to improving the structural strength and service life on the basis of ensuring the reliability of disassembly and assembly. Specifically, when the locking end 2201 is separated from the limiting end 2102, a disassembly and assembly gap is formed between the limiting end 2102 and the locking tongue 221.

[0059] Furthermore, the sliding locking structure 20 further includes an elastic member 24 sleeved on the outer periphery of the guiding post 232. Two ends of the elastic member 24 are respectively abutted against the limiting plate 2131 and the second stop end 2302. With this arrangement, the automatic reset of the sliding assembly 21 is realized through the elastic member 24. Combined with the rotational adjustment of the locking assembly 22, the hard disk recorder can be applicable to both non - anti - theft usage scenarios and compatible states of anti - theft usage scenarios. Specifically, when the hard disk recorder is applicable to non - anti - theft usage scenarios, the locking end 2201 of the locking assembly 22 can always remain in a separated state from the limiting end 2102. When the hard disk recorder is applicable to anti - theft usage scenarios, the locking or unlocking of the sliding assembly 21 is realized through the rotational adjustment of the locking end 2201 of the locking assembly 22 by the key 80.

[0060] In this embodiment, the limiting plate 2131 is located on one side in the sliding direction of the limiting seat 213, and the panel housing 30 has a locked state, an unlocked state, and a disassembly and assembly state.

[0061] As Figure 5 shown in FIG. 4, in the locked state, the limiting protrusion 212 extends into the hanging ear structure 11. The limiting plate 2131 abuts against the first stop end 2301 under the action of the elastic member 24. The lock 222 is rotated by the key 80 until the locking end 2201 at the end of the locking tongue 221 abuts against the limiting end 2102 of the stop seat 214 to ensure that the limiting protrusion 212 will not retract by itself, thereby realizing the locking of the position of the sliding assembly 21;

[0062] AsFigure 6 As shown, in the unlocked state, the lock 222 is rotated by the key 80 until the locking end 2201 at the end of the lock tongue 221 is separated from the limiting end 2102 of the stop seat 214 (the locking end 2201 rotates around the center of the lock core and rotates from the horizontal state to the vertical state), so as to avoid the disassembly and assembly gap for the movement of the sliding assembly 21;

[0063] As Figure 7 shown, in the disassembly and assembly state, the operator manually adjusts the sliding unlocking member 211 to drive the entire sliding assembly 21 to move towards the disassembly and assembly gap until the limiting protrusion 212 disengages from the hanging ear structure 11, and the disassembly of the panel shell 30 can be realized.

[0064] Relatively, the installation of the panel shell 30 only needs to be operated in the reverse direction. With this setting, after the installation of the panel shell 30 is completed, it can be locked to ensure the stability and anti-theft performance of the installation.

[0065] Among them, the sliding direction of the sliding assembly 21 is parallel to the length direction of the front side opening of the chassis 10. The hanging ear structure 11 includes a first hanging ear 111 and a second hanging ear 112. The first hanging ear 111 and the second hanging ear 112 are arranged on both sides of the chassis 10 along the length direction of the front side opening of the chassis 10. The first hanging ear 111 and the second hanging ear 112 are respectively in limit fit with the two side walls in the length direction of the panel shell 30. In the sliding direction of the sliding locking structure 20, one side wall of the panel shell 30 is connected to the first hanging ear 111 through the sliding locking structure 20, and / or the other side wall of the panel shell 30 is connected to the second hanging ear 112 through the sliding locking structure 20. With this setting, the reliability of the installation of the panel shell 30 is further ensured.

[0066] As Figures 1 to 12 shown, one side wall of the panel shell 30 is connected to the first hanging ear 111 through the sliding locking structure 20. The side wall of the panel shell 30 that is in limit fit with the second hanging ear 112 is provided with a panel side convex 302. The first hanging ear 111 and the second hanging ear 112 have hanging ear side grooves 1101 respectively used for passing through the first transfer end 2101 and the panel side convex 302. A panel groove 303 for passing through the first transfer end 2101 is formed on the side wall of the panel shell 30 that is in limit fit with the first hanging ear 111. The panel side convex 302 is detachably clamped with the hanging ear side groove 1101 of the second hanging ear 112.

[0067] In this embodiment, the panel groove 303 and the panel side convex 302 are respectively arranged on two side walls in the length direction of the panel housing 30. The connection between the panel housing 30 and the hanging ear structure 11 is designed such that the whole panel housing 30 can rotate slightly around its connection position with the second hanging ear 112. When installing the panel housing 30, first install it on the second hanging ear 112. The operator passes the panel side convex 302 into the hanging ear side groove 1101 of the second hanging ear 112 from one side (as Figure 1 shown), and then turn the other side of the panel housing 30 to correspond to the hanging ear side groove 1101 of the first hanging ear 111. Then, adjust the sliding locking structure 20 to make the limit protrusion 212 extend into the hanging ear side groove 1101 of the first hanging ear 111, and then lock the sliding locking structure 20 to complete the locking and clamping of the panel housing 30.

[0068] As Figure 12 shown, the hard disk video recorder further includes an alarm module 40. The alarm module 40 has a touch switch 41 arranged in the hanging ear structure 11. The touch switch 41 is electrically connected to the alarm module 40. The first transfer end 2101 is separably in contact with the touch switch 41. When the first transfer end 2101 is separated from the touch switch 41, the alarm module 40 alarms. With such a setting, the forced removal alarm of the panel housing 30 is realized through the alarm module 40, and the anti-theft monitoring of the hard disk video recorder is realized. Among them, the structures of the first hanging ear 111 and the second hanging ear 112 are the same. The first hanging ear 111 or the second hanging ear 112 includes a hanging ear seat 113 and a hanging ear PCB 74 arranged in the hanging ear seat 113. The touch switch 41 is arranged on the hanging ear PCB 74.

[0069] It can be understood that the triggering of the touch switch 41 can be adjusted according to the actual situation. For example, Figure 12 in the embodiment shown, the press-and-release trigger is adopted. After the panel housing 30 is installed, the limit protrusion 212 will press against the touch switch 41. When they are separated, the touch switch 41 detects the separation and makes the alarm module 40 alarm. Or in other embodiments not shown in the figure, the triggering of the touch switch 41 can also adopt the lever method. For example, after the panel housing 30 is installed, the limit protrusion 212 will toggle the touch switch 41 to a non-alarm position. After the limit protrusion 212 comes out, the touch switch 41 automatically resets to the alarm position under the action of an elastic structure or the like and makes the alarm module 40 alarm.

[0070] Preferably, the user can independently set whether to activate the alarm module 40 to prevent the alarm from sounding when the user removes the panel housing 30 for normal maintenance of the DVR. Further, an external remote control device for controlling the alarm module 40 can be set. After the user activates the anti-theft alarm function of the alarm module 40, when removing the panel housing 30 for maintenance, the alarm module 40 can be controlled to turn off through the external remote control device, or the alarm module 40 can be controlled to turn off through the host interface software. It can be understood that an auxiliary structure can also be set at a concealed position within the ear structure 11 so that when maintaining, the alarm module 40 can be stopped from alarming by controlling the auxiliary structure to touch the touch switch 41.

[0071] Further, the panel housing 30 has a second transfer end, the first transfer end 2101 extends into the first ear 111, and the second transfer end correspondingly extends into the second ear 112 to snap-fit the panel housing 30 at the front opening of the chassis 10; touch switches 41 are provided in both the first ear 111 and the second ear 112. The first transfer end 2101 is detachably in contact with the touch switch 41 in the first ear 111, and the second transfer end is detachably in contact with the touch switch 41 in the second ear 112. When the first transfer end 2101 is separated from the touch switch 41 and the second transfer end is separated from the touch switch 41, the alarm module 40 alarms.

[0072] In this embodiment, one side of the panel housing 30 is snap-connected to the first ear 111 through the sliding locking structure 20, and the other side of the panel housing 30 is directly snap-connected to the second ear 112 through the panel side protrusion 302. The end of the panel side protrusion 302 forms the second transfer end. This embodiment defines the alarm situation. The alarm module 40 alarms only when the first transfer end 2101 is separated from the corresponding touch switch 41 and the second transfer end is separated from the corresponding touch switch 41, avoiding false alarms caused by loose contacts on either side due to the vibration of the DVR and ensuring the reliability and stability of the alarm.

[0073] Preferably, in order to avoid false alarms caused by short-term loosening, the separation time between the limit protrusion 212 and the touch switch 41 can also be limited. For example, a short-term separation within 5 s can be set as a normal scenario where no alarm occurs.

[0074] Preferably, the alarm module 40 includes a buzzer and alarms through the buzzer.

[0075] Among them, the DVR further includes a main power supply 51 provided in the chassis 10 and an auxiliary power supply provided in the ear structure 11. Both the main power supply 51 and the auxiliary power supply are electrically connected to the alarm module 40.

[0076] With such a setting, dual-control power supply for the alarm module 40 is achieved. When the hard disk video recorder is normally started, it is powered by the main power supply 51 set in the chassis 10. When the hard disk video recorder is turned off, it is powered by the auxiliary power supply (such as a small battery like a button battery) set in the ear structure 11, which can meet the requirement that the anti-theft alarm recording function can be realized whether the device is powered off or on under the anti-theft function enabled. Among them, the auxiliary power supply in this embodiment is set on the ear PCB 74 in the ear seat 113.

[0077] As Figure 8 shown, the interior of the chassis 10 is divided into a main control area 101, a power supply area 102, and a hard disk area 103. There is an air guiding duct in the chassis 10, and the air guiding duct flows through the main control area 101, the power supply area 102, and the hard disk area 103. Air inlets 105 communicating with the air guiding duct are provided on the side walls of the main control area 101, the power supply area 102, and the hard disk area 103. An air outlet 106 is provided on the side wall of the chassis 10. The hard disk video recorder further includes a fan assembly 60 provided at the air outlet 106. The fan assembly 60 is used to form an air flow flowing from multiple air inlets 105 to the air outlet 106 in the air guiding duct. Among them, Figure 8 the direction indicated by the arrow shown is the flow condition of the air flow. With such a setting, on the basis of improving the space utilization rate of the interior of the chassis 10, the internal temperature is reduced by using the side-draft heat dissipation method to ensure the reliability of heat dissipation. At the same time, the high density of the chassis 10 is achieved by using the side-draft scheme and the reduction and stacking of the chassis 10 structure.

[0078] Among them, the air guiding duct in this embodiment is an irregular duct formed by multiple interconnected gap areas inside the chassis 10.

[0079] As Figure 8 and Figure 9 shown, the hard disk area 103 includes a transfer area 1031 and an installation area 1032 formed by multiple hard disk slides 10321. The hard disk video recorder further includes multiple hard disks 71, a main control PCB 72, a power transfer PCB 73, an ear PCB 74, a central transfer PCB 75, and a main power supply 51. The multiple hard disks 71 are respectively and pluggably arranged in the multiple hard disk slides 10321. The main control PCB 72 is arranged in the main control area 101. The power transfer PCB 73 and the main power supply 51 are arranged in the power supply area 102. The ear PCB 74 is arranged in the ear structure 11. The central transfer PCB 75 is arranged in the transfer area 1031. The main control PCB 72 and the central transfer PCB 75 are powered by the main power supply 51 through the power transfer PCB 73. The central transfer PCB 75 is electrically connected to the ear PCB 74 through a flexible PCB line 76.

[0080] In this embodiment, the hard disk area 103 is formed on the front side, the power area 102 and the main control area 101 are formed side by side on the rear side, and the installation area 1032 is formed on the front side of the adapter area 1031, which improves the space utilization rate inside the chassis 10. Multiple air inlets 105 are distributed on the front and rear sides of the chassis 10, and the exhaust port 106 is arranged on the side wall of the chassis 10 close to the main control area 101. Specifically, a power box bracket 13 is arranged at the power area 102, and the power box bracket 13 has an opening on the rear side of the chassis 10. The main power supply 51 extends into the power box bracket 13 from the opening and is connected to the power adapter PCB 73. The front air inlet 105 is formed on the panel shell 30, and part of the rear air inlet 105 is formed on the rear side plate between the power adapter PCB 73 and the main control PCB 72, and the other part of the rear air inlet 105 is formed in the gap between the main power supply 51 and the opening of the power box bracket 13.

[0081] Among them, the chassis 10 is also provided with a hard disk socket 772 and a plurality of hard disk brackets 14, and the plurality of hard disk brackets 14 are slidably arranged in a plurality of hard disk slideways 10321 in a one-to-one correspondence. When the hard disk 71 needs to be installed, the hard disk bracket 14 is first pulled out, and then the hard disk 71 is installed, and then the hard disk bracket 14 is pushed back into the hard disk slideway 10321 and cooperates with the hard disk socket 772 stopper to complete the installation of the hard disk 71. Specifically, in this embodiment, there are 12 hard disk slideways 10321, which are distributed in 3 rows and 4 columns.

[0082] It can be understood that the main control PCB72 and the central switching PCB75 are powered by the built-in power supply (main power supply 51) through the power switching PCB73, and the ear PCB74 in the first ear 111 and the second ear 112 is connected to the central switching PCB75 through the flexible PCB line 76 for control. In addition to the functional connector required by itself, the ear PCB74 can be equipped with an alarm module 40, and the alarm module 40 can be powered by the auxiliary power supply and the main power supply 51 according to the scenario.

[0083] Specifically, the ear PCB 74 is connected to the central switching PCB 75 through the flexible PCB line 76. The flexible PCB line 76 is first inserted into the terminal block 771 of the ear PCB 74 and then fixed to the ear seat 113 as a whole. The ear seat 113 is fixed on the chassis 10. The flexible PCB line 76 can pass through and then be fixed to the terminal block 771 of the central switching PCB 75 with the help of the hard disk slide 10321 and the existing chassis side port 107 of the chassis 10; because the thickness of the flexible PCB line 76 is only about 0.5 mm, there is a possibility that the equipment is roughly manufactured and inserted into the gap. For this reason, a cavity is designed between the upper and lower parts of the hard disk slide 10321, so that the flexible PCB line 76 can be assisted in maintenance without affecting the sliding space of the hard disk 71.

[0084] like Figure 10 andFigure 11 As shown, the first hanging ear 111 includes a hanging ear seat 113, a hanging ear PCB74 and a captive screw 114, the hanging ear seat 113 has a PCB area 1131 and a transfer adjustment area 1132, the hanging ear PCB74 is arranged in the PCB area 1131, the transfer adjustment area 1132 has a rotating plate 117 that can be rotatably opened and closed by a torsion spring 115 and a pin 116 to open or close the transfer adjustment area 1132, and the captive screw 114 is rotatably arranged in the transfer adjustment area 1132 to transfer the chassis 10 to the cabinet. In this embodiment, the structure of the second hanging ear 112 is symmetrical to that of the first hanging ear 111.

[0085] In this embodiment, the torsion spring 115 is wound around the outer periphery of the pin 116, and the ear structure 11 further includes a first buckle 118 and a second buckle 119, the first buckle 118 is fixedly arranged on the inner side of the rotating plate 117, and the second buckle 119 is fixedly arranged in the ear seat 113, and the two ends of the torsion spring 115 are respectively clamped on the first buckle 118 and the second buckle 119 to realize the rotation and reset of the rotating plate 117. The user can bend down the rotating plate 117 and use a screwdriver to fix the internal captive screws 114 to assist in fixing the chassis 10 on the cabinet. Among them, the captive screws 114 are not used for bearing force.

[0086] In summary, the utility model provides a hard disk video recorder, which improves the utilization rate of the chassis 10 and realizes the high density of the chassis 10 by using the side exhaust solution and the reduced stacking of the chassis 10 structure. On the other hand, a sliding locking structure 20 is provided that combines sliding unlocking with lock fixation, which can realize direct mechanical locking and fixation of the panel shell 30 while supporting quick disassembly and quick installation, thereby ensuring the reliability and stability of the installation. Furthermore, the present embodiment adds a software and hardware solution, which uses press separation or conductive separation to trigger the alarm module 40, so as to alarm when the panel shell 30 is removed, thereby improving the anti-theft performance. Moreover, the alarm module 40 in the present embodiment adopts a dual power supply solution, which can realize automatic selection of the power supply by using voltage, so that the hard disk video recorder as a whole can meet the buzzer alarm function after removal in both the power-on and power-off states.

[0087] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0088] Unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and values set forth in these embodiments do not limit the scope of the present utility model. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationship. Technologies, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0089] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. is usually based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description. Without contrary description, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and thus cannot be construed as limiting the protection scope of the present utility model; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0090] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" and the like can be used here to describe the spatial positional relationship between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to include different orientations in use or operation in addition to the orientation described in the drawings of the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0091] In addition, it should be noted that the use of words such as "first", "second" to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above words have no special meaning, and thus cannot be construed as limiting the protection scope of the present utility model.

[0092] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. For those skilled in the art, the present utility model may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A digital video recorder, characterized in that, The invention comprises a chassis (10), a sliding locking structure (20) and a panel shell (30); the front opening of the chassis (10) is provided with a hanging ear structure (11) for limiting the installation of the panel shell (30); the sliding locking structure (20) comprises a sliding component (21) and a locking component (22) arranged in the panel shell (30); the sliding component (21) has a first adapter end (2101) and a limiting end (2102) arranged opposite to each other along its sliding direction; the first adapter end (2101) and the limiting end (2102) are connected to each other The locking assembly (22) is connected to the ear structure (11); the locking end (2201) has an adjustable locking end (2201); when the locking end (2201) is limitedly matched with the limiting end (2102), the panel shell (30) is locked and installed at the front opening of the chassis (10); when the locking end (2201) is separated from the limiting end (2102), the sliding assembly (21) can slide to separate the first adapter end (2101) and the ear structure (11).

2. The digital video recorder according to claim 1, wherein, The sliding assembly (21) comprises a sliding unlocking member (211) and a limiting protrusion (212), a limiting seat (213) and a stop seat (214) connected in sequence along the sliding direction; the limiting seat (213) is limitedly installed in the chassis (10); the two ends of the limiting protrusion (212) and the stop seat (214) which are separated from each other respectively form the first transfer end (2101) and the locking end (2201); the front side of the panel shell (30) has an installation opening (301) extending along the sliding direction of the sliding assembly (21); the sliding unlocking member (211) is slidably arranged at the installation opening (301) and connected to the limiting seat (213).

3. The digital video recorder according to claim 2, wherein The sliding direction of the sliding component (21), the extending direction of the limiting protrusion (212) and the length direction of the panel shell (30) are all parallel to the length direction of the panel shell (30). The sliding component (21) includes a plurality of limiting protrusions (212), and the plurality of limiting protrusions (212) are arranged on the limiting seat (213) at intervals along the width direction and / or height direction of the panel shell (30).

4. The digital video recorder according to claim 2, characterized in that The sliding locking structure (20) further includes a guiding and limiting component (23) disposed within the panel housing (30). The guiding and limiting component (23) has a first stop end (2301) and a second stop end (2302) oppositely arranged in the sliding direction of the sliding component (21). The limiting seat (213) has a limiting plate (2131) disposed perpendicular to the sliding direction. The first stop end (2301) and the second stop end (2302) are respectively located on both sides of the limiting plate (2131). The first stop end (2301) is fixedly connected to the inner side of the side wall of the first transfer end (2101) protruding from the panel housing (30). One side of the limiting plate (2131) is in stop cooperation with the first stop end (2301), and the other side of the limiting plate (2131) is in stop cooperation with the second stop end (2302).

5. The hard disk video recorder according to claim 4, characterized in that The guiding and limiting component (23) includes a mounting seat (231), a guiding post (232), and a gasket screw (233) sequentially connected along the sliding direction of the sliding component (21). The extending direction of the guiding post (232) is parallel to the sliding direction of the sliding component (21). The guiding post (232) slidably passes through the limiting plate (2131) and is in limiting cooperation with the limiting plate (2131). The mounting seat (231) and the gasket screw (233) are respectively located on both sides of the limiting plate (2131). One side of the mounting seat (231) facing the guiding post (232) forms the first stop end (2301), and one side of the gasket screw (233) facing the guiding post (232) forms the second stop end (2302).

6. The digital video recorder according to claim 5, wherein The sliding locking structure (20) further includes an elastic member (24). Two ends of the elastic member (24) are respectively in abutment with the limiting plate (2131) and the second stop end (2302).

7. The digital video recorder according to claim 1, wherein The sliding direction of the sliding component (21) is parallel to the length direction of the front opening of the chassis (10). The hanger structure (11) includes a first hanger (111) and a second hanger (112). The first hanger (111) and the second hanger (112) are arranged on both sides of the chassis (10) along the length direction of the front opening of the chassis (10). The first hanger (111) and the second hanger (112) are respectively in limiting cooperation with two side walls in the length direction of the panel housing (30). In the sliding direction of the sliding locking structure (20), one side wall of the panel housing (30) is connected to the first hanger (111) through the sliding locking structure (20), and / or, the other side wall of the panel housing (30) is connected to the second hanger (112) through the sliding locking structure (20).

8. The digital video recorder according to claim 7, characterized in that, One side wall of the panel case (30) is connected to the first lugs (111) through the sliding locking structure (20). A side wall of the panel case (30) that is in limit fit with the second lugs (112) is provided with panel side protrusions (302). The first lugs (111) and the second lugs (112) have lug side slots (1101) respectively for passing through the first adapter end (2101) and the panel side protrusions (302). A panel slot (303) for passing through the first adapter end (2101) is formed on the side wall of the panel case (30) that is in limit fit with the first lugs (111). The panel side protrusions (302) are detachably clamped with the lug side slots (1101) of the second lugs (112).

9. The digital video recorder according to claim 1, characterized in that The locking assembly (22) includes a locking tongue (221) and a lock (222) arranged on the panel case (30). The lock core of the lock (222) is rotatably arranged in the panel case (30). The locking tongue (221) is fixedly sleeved on the outer periphery of the lock core. The lock (222) has a keyhole (2221) to rotate the lock core and the locking tongue (221) through a matching key (80). One end of the locking tongue (221) far from the center of the lock core forms the locking end (2201).

10. The digital video recorder according to claim 1, wherein The hard disk video recorder further includes an alarm module (40). The alarm module (40) has a touch switch (41) arranged in the lug structure (11). The touch switch (41) is electrically connected to the alarm module (40). The first adapter end (2101) is detachably in contact with the touch switch (41). When the first adapter end (2101) is separated from the touch switch (41), the alarm module (40) gives an alarm.

11. The digital video recorder according to claim 1, characterized in that The hard disk video recorder further includes an alarm module (40). The alarm module (40) has a touch switch (41) arranged in the lug structure (11). The lug structure (11) includes a first lug (111) and a second lug (112) arranged on both sides of the front opening of the chassis (10) along the length direction of the front opening of the chassis (10). The panel case (30) has a second adapter end. The first adapter end (2101) extends into the first lug (111), and the second adapter end correspondingly extends into the second lug (112) to clamp the panel case (30) at the front opening of the chassis (10). The touch switch (41) is arranged in both the first lugs (111) and the second lugs (112). The first adapter end (2101) is detachably in contact with the touch switch (41) in the first lugs (111), and the second adapter end is detachably in contact with the touch switch (41) in the second lugs (112). When the first adapter end (2101) is separated from the touch switch (41) and the second adapter end is separated from the touch switch (41), the alarm module (40) gives an alarm.

12. The digital video recorder according to claim 10, characterized in that, The DVR further includes a main power supply (51) disposed within the chassis (10) and an auxiliary power supply disposed within the ear structure (11). Both the main power supply (51) and the auxiliary power supply are electrically connected to the alarm module (40).

13. The digital video recorder according to claim 1, characterized in that, The interior of the chassis (10) is divided into a main control area (101), a power supply area (102), and a hard disk area (103). There is an air guiding duct within the chassis (10), and the air guiding duct flows through the main control area (101), the power supply area (102), and the hard disk area (103). Air inlets (105) communicating with the air guiding duct are provided on the side walls of the main control area (101), the power supply area (102), and the hard disk area (103). An air outlet (106) is provided on the side wall of the chassis (10). The DVR further includes a fan assembly (60) disposed at the air outlet (106). The fan assembly (60) is configured to form an air flow within the air guiding duct flowing from the plurality of air inlets (105) to the air outlet (106).

14. The hard disk video recorder according to claim 13, characterized in that, The hard disk area (103) includes a transfer area (1031) and an installation area (1032) formed by a plurality of hard disk slides (10321). The DVR further includes a plurality of hard disks (71), a main control PCB (72), a power supply transfer PCB (73), an ear PCB (74), a central transfer PCB (75), and a main power supply (51). The plurality of hard disks (71) are respectively and detachably disposed within the plurality of hard disk slides (10321). The main control PCB (72) is disposed within the main control area (101). The power supply transfer PCB (73) and the main power supply (51) are disposed within the power supply area (102). The ear PCB (74) is disposed within the ear structure (11). The central transfer PCB (75) is disposed within the transfer area (1031). The main control PCB (72) and the central transfer PCB (75) are powered by the main power supply (51) through the power supply transfer PCB (73). The central transfer PCB (75) is electrically connected to the ear PCB (74) through a flexible PCB line (76).

15. The digital video recorder according to claim 1, characterized in that The ear structure (11) includes a first ear (111) and a second ear (112) having the same structure. The first ear (111) or the second ear (112) includes an ear seat (113), an ear PCB (74), and a non-loosening screw (114). The ear seat (113) has a PCB area (1131) and a transfer adjustment area (1132). The ear PCB (74) is disposed within the PCB area (1131). The transfer adjustment area (1132) has a rotating plate (117) rotatably opened and closed through a torsion spring (115) and a pin shaft (116) to open or block the transfer adjustment area (1132). The non-loosening screw (114) is rotatably disposed within the transfer adjustment area (1132) to transfer the chassis (10) onto a cabinet.

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