TWI781646B - Solid-state drive having housing with engaging mechanism - Google Patents

Abstract

The present invention relates to a solid-state drive comprising a first housing having a first engaging portion; a second housing having a second engaging portion corresponding to the first engaging portion in position, wherein the first housing and the second housing are fitted with each other; and a storage unit configured between the first housing and the second housing, wherein the first engaging portion and the second engaging portion form an engaged structure and the first housing and the second housing are fixed and connected with each other by the engaged structure.

Description

Solid state drives with snap-on housings

The present invention relates to a solid-state hard disk, in particular to a solid-state hard disk whose housing is combined through a locking mechanism.

A solid-state drive (SSD) is a digital data storage device that uses a high-density integrated circuit (IC) chip as a storage medium. If it is equipped with a non-volatile memory chip such as a flash memory, then It can be used as a permanent storage device, and if it is equipped with a volatile memory chip such as a random access memory, it can be used as a temporary storage device.

According to the current development status of solid-state hard disks, related technologies have matured. Compared with traditional mechanical hard disks (HDDs), solid-state hard disks have many advantages that mechanical hard disks cannot achieve, including fast read and write speeds, no noise, and no moving parts. Loss, vibration resistance, low power consumption, low power consumption, low heat generation, simple structure, and long life, etc., so although the price is high, its application has gradually become popular.

Generally speaking, the structure of the solid-state hard drive is very simple. After disassembling the solid-state hard drive case, it can be found that there is only one printed circuit board assembly (PCBA) inside the case. The PCBA consists of a control chip and multiple The memory chip is responsible for storing data, and the control chip is responsible for reading, writing data and managing all memory chips and circuits. The solid-state hard drive is equivalent to an additional shell PCBA.

In conventional technology, the casing of a solid-state drive usually includes two parts: an upper cover and a lower cover. In the early days, the upper cover and the lower cover were used to be locked by screws. However, in order to improve product competitiveness, the cost must be further reduced, and the volume must be designed towards miniaturization and thinning. In the case with limited space, more memory chips must be deployed. , the weight must also be light. To meet these conditions, it is necessary to abandon the screw locking and design other methods to make the upper and lower covers combined and fixed.

Therefore, in view of the shortcomings in the conventional technology, the inventor has tried and researched carefully, and with the spirit of perseverance, finally conceived the case "solid state hard disk with a snap-on housing", which can overcome the above-mentioned shortcomings. The following is a brief description of the present invention.

In view of the shortcomings of the conventional technology, the present invention proposes to use a snap-in mechanism instead of a screw lock to connect the two shells of the solid-state hard disk, and further eliminate several shortcomings of the snap-in mechanism, including the snap-in mechanism is not resistant to repeated disassembly, repeated disassembly It is easy to break, and it is also easy to be damaged during disassembly, and due to the small size of the solid state drive, the size of the locking mechanism is relatively small and it is not easy to disassemble.

The present invention proposes a solid state hard disk, which includes: a first housing with a first engaging portion; a second housing with a second engaging portion corresponding to the first engaging portion in position, and nested with the first housing; and a storage unit, which is disposed between the first housing and the second housing, wherein the first engaging portion and the second engaging portion are combined to form a mechanism The fastening structure, the first casing and the second casing are fixedly connected to each other through the fastening structure.

The described solid-state hard disk also includes: the first housing also has a first panel and a first side wall perpendicular to the first panel, the first side wall is from the edge of the first panel toward the direction of the storage unit set vertically, the first engaging portion is set on the first side wall; the second housing also has a second panel and a second side wall perpendicular to the second panel, the second side wall is formed from the second panel The edge is arranged vertically toward the direction of the storage unit, and the second locking part is arranged on the first Two side walls; the first engaging portion is formed by processing the first side wall; or the second engaging portion is formed by processing the second side wall.

The described solid-state hard disk also includes: the first housing is provided with a first through hole at a position where the first panel is close to the buckle structure; or the second housing is opened at a position where the second panel is close to the buckle A second through hole is opened at the position of the combined structure.

The first through hole allows a first tool to enter through the first through hole to release the fastening structure, and the second through hole allows a second tool to enter through the second through hole to release the fastening structure.

The described solid-state hard disk also includes: the second casing also has an attachment hole for the second casing to be attached to the host device; or the second casing also has an assembly positioning hole for the storage unit attached to the second housing.

The first engaging part is selected from a male fastener, a buckle, a fastener, a fastener, a tenon, a hook, a fastener, a bump, a protrusion, a female fastener, a groove, and a through hole. , snapping holes, slots, grooves, depressions, and blind holes, the second engaging portion is selected from male fasteners, snapping pieces, snapping pieces, fastening pieces, tenon pieces, hook pieces, One of clips, bumps, protrusions, female fasteners, clip grooves, through holes, clip holes, clip slots, grooves, depressions and blind holes.

The material of the first shell and the second shell is selected from polycarbonate (PC) material, acrylonitrile-butadiene-styrene copolymer (ABS) material, polycarbonate-acrylonitrile-butadiene - one of styrene copolymer mixture (PC/ABS) composite material, composite material based on acrylonitrile-butadiene-styrene copolymer, alloy material and combination thereof.

The storage unit includes a circuit substrate, a non-volatile memory array including a plurality of non-volatile memories arranged on the circuit substrate, and a connector.

These non-volatile memory systems are selected from 3D NAND flash memory, One of V-NAND flash memory, QLC NAND flash memory, TLC NAND flash memory, MLC NAND flash memory and SLC NAND flash memory, the transmission interface specification used by the connector is selected from One of PCIe interface, NVMe interface, M.2 interface, U.2 interface, mSATA interface, SATA interface, SATA Express interface, AHCI interface, UATA interface, ZIF interface, IDE interface, CF interface and CFast interface.

The present invention further proposes a solid-state hard disk, which includes: at least one engaging mechanism, which includes a first engaging portion and a second engaging portion corresponding to each other in position; a first housing, which has the first engaging part; a second shell, which has the second engaging portion, and fits with the first shell; and a solid state storage unit, which is arranged between the first shell and the second shell, wherein The first casing and the second casing are buckled and connected to each other through the at least one engaging mechanism.

The above summary of the invention is intended to provide a simplified summary of the disclosure to enable readers to have a basic understanding of the disclosure. This summary of the invention is not intended to disclose a complete description of the invention, and is not intended to point out important/key elements or components of the embodiments of the invention. define the scope of the invention.

10: SSD

100: first case

110: first panel

121, 123: the first side wall

122, 124: the first side wall

130: first connector opening

180: Rib

200: second shell

210: second panel

223: second side wall

222, 224: the second side wall

230: second connector opening

240: Connector opening

250: Second through hole

260: Attachment hole

270: Assembly positioning hole

300: snap mechanism

310: the first engaging part

312: Rectangular buckle

314: Stretch triangle buckle

320: the second engaging part

322: Rectangular slot

324: Concave triangular blind hole

330: buckle structure

400: storage unit

401: circuit substrate

403: connector

405: Main control chip

407: Random Access Memory Chip

409: Non-volatile memory chips

411: Non-volatile memory array

413: Capacitor

415: socket structure

417: Installation positioning hole

Figure 1 and Figure 2 are schematic diagrams showing the first embodiment of the solid state disk of the present invention;

Figure 3 is a schematic diagram showing the second embodiment of the solid state disk of the present invention;

Figure 4 and Figure 5 are schematic diagrams showing the third embodiment of the solid state disk of the present invention; and

Fig. 6 is a schematic diagram showing the functional block of the storage unit included in the solid state disk of the present invention.

The present invention will be fully understood by the following examples, so that those skilled in the art can complete it, but the implementation of the present invention cannot be determined by the following examples Its implementation is limited; the drawings of the present invention do not contain limitations on the size, size and scale, and the size, size and scale of the present invention cannot be limited by the drawings of the present invention during actual implementation.

The word "preferred" in this article is non-exclusive and should be understood as "preferably but not limited to". order, the scope of the present invention should be determined only by the appended claims and their equivalents, not by the examples illustrated in the implementation; when the term "comprising" and its variations appear in the specification and claims, it is An open-ended term without a restrictive meaning that does not exclude other features or steps.

FIG. 1 and FIG. 2 are schematic diagrams showing the first embodiment of the solid state hard disk of the present invention; the solid state hard disk 10 of the present invention includes a first casing 100, a second casing 200, an engaging mechanism 300, and The storage unit 400, in this embodiment, the first housing 100 is preferably used as the upper cover, the second housing 200 is preferably used as the lower cover, and at least one engaging mechanism 300 includes first joints that can be combined and separated from each other. The engaging portion 310 and the second engaging portion 320 .

The materials available for making the first housing 100 and the second housing 200 include but not limited to polycarbonate (PC) material, acrylonitrile-butadiene-styrene copolymer (ABS) material, polycarbonate-acrylic Nitrile-butadiene-styrene copolymer mixture (PC/ABS) alloy resin materials, ABS-based composite materials or alloy materials, etc., wherein ABS-based composite materials such as PA/ABS composite materials, PBT/ABS composite materials or ABS/PVC composite material.

The first housing 100 has a first panel 110 as an upper cover and a plurality of first side walls 121, 122, 123, and 124 arranged vertically to the first panel 110, to meet the current specifications of solid state drives, the first housing 100 The shape is preferably a rectangle, so the first panel 110 is roughly a rectangular flat plate shape, a plurality of first sidewalls 121, 122, 123 and 124 are disposed at the edge of the first panel 110 in a manner surrounding the edge of the first panel 110, and are vertically arranged toward the direction of the storage unit 400, and the plurality of first sidewalls 121 , 122, 123 and 124 may be arranged discontinuously or in a continuous arrangement as adopted in this embodiment.

Preferably, for example, on the first side walls 122 and 124, there is an unlimited number but at least one first engaging portion 310, and the form of the first engaging portion 310 is, for example but not limited to: a male fastener, a card Fasteners, clips, clips, mortises, hooks, clips, bumps or protrusions, etc. The first engaging portion 310 is preferably processed by the body materials of the first side walls 122 and 124 through stamping processes such as bending, refolding, stretching or forming (forming), and directly forms the bodies of the first side walls 122 and 124. to make.

For example, as shown in FIG. 1, the bodies of the first side walls 122 and 124 are extruded through stamping, and a protruding rectangular buckle 312 is directly formed on the first side walls 122 and 124, or, as shown in FIG. 2 Shown, extruding the body of the first side wall 122 and 124 through the stamping process directly forms a protruding triangular buckle 314 on the first side wall 122 and 124, or, through stamping the body of the first side wall 122 and 124, directly on the first side wall 122 and 124. A protruding circular bump is formed on the first sidewalls 122 and 124 , and the first engaging portion 310 is made of the body material of the first sidewalls 122 and 124 .

The second housing 200 has a second panel 210 as a lower cover and a plurality of second side walls 222, 223 and 224 arranged vertically to the second panel 210, corresponding to the shape of the first housing 100, the second housing 200 The shape is also preferably rectangular, so the second panel 210 is roughly in the shape of a rectangular flat plate, and a plurality of second side walls 222, 223 and 224 are arranged at the edge of the second panel 210 in a manner surrounding the edge of the second panel 210, and face toward The direction of the storage unit 400 is arranged vertically, and the plurality of second side walls 222 , 223 and 224 may be arranged continuously or discontinuously as in this embodiment.

Preferably, for example, on the second side walls 222 and 224, there is an unlimited number but at least one second engaging portion 320, and the form of the second engaging portion 320 is, for example but not limited to: a female fastener, a through holes, slots, slots, slots, grooves, depressions or blind holes, etc., in this embodiment, as disclosed in Figure 1 and Figure 2, the second engaging portion 320 is a rectangular slot 322 form to implement.

The second engaging portion 320 is preferably made directly from the bodies of the second side walls 222 and 224 by performing a stamping process to process the body materials of the second side walls 222 and 224 . For example, extruding the bodies of the second sidewalls 222 and 224 through stamping, directly forming a concave rectangular groove on the second sidewalls 222 and 224, or through the second sidewalls 222 and 224 through punching, An engaging groove is formed on the second sidewalls 222 and 224 , and the second engaging portion 320 is made of the body material of the second sidewalls 222 and 224 .

The first side wall 121 of the first shell 100 also has a notch of a first connector opening 130, and the second panel 210 of the second shell 200 also has a notch of a second connector opening 230, when the first shell After the body 100 and the second housing 200 are fit together, the first connector opening 130 and the second connector opening 230 will jointly form a connector opening 240 to expose the connector 403 on the storage unit 400 and form a plug-in structure. Insert it into the solid state drive slot of the host device.

Preferably, the size of the first shell 100 is designed to be slightly larger than the second shell 200, and the second shell 200 can be inserted into the first shell 100. When the first shell 100 and the second shell 200 fit together Afterwards, the plurality of first side walls 121, 122, 123 and 124 will surround the plurality of second side walls 222, 223 and 224, and the positions and shapes of the plurality of first engaging portions 310 and the plurality of second engaging portions 320 Corresponding to each other, the first shell 100 and the second shell 200 are pressed together to form a fit, and the multiple first engaging parts 310 are engaged with the multiple second engaging parts 320 to form multiple snap fits. The structure 330 , the first casing 100 and the second casing 200 will be firmly connected through the fastening structure 330 .

Figure 3 is a schematic diagram showing the second embodiment of the solid state hard drive of the present invention; in this embodiment, the first engaging part 310 is a stretched triangular buckle 314, and the second engaging part 320 is a concave triangular blind hole 324 , the first engaging part 310 stretches the body of the first side walls 122 and 124 through punching and stamping, and directly forms a stretched triangular buckle 314 on the first side walls 122 and 124, while the second engaging part 320 is punched. The body of the second sidewalls 222 and 224 is stretched by cutting and stamping to form a concave triangular blind hole 324 directly on the second sidewalls 222 and 224 .

The plurality of first engaging parts 310 and the plurality of second engaging parts 320 can be further described as a group of three-dimensional structures that correspond to each other in position and are complementary in structure, shape and form, so as to There is a height difference on the joint surface of the two engaging parts, resulting in a fastening effect. After being combined by force, a tightly combined but detachable fastening structure 330 is formed, so that the first housing 100 and the second housing 200 can pass through. The fastening structure 330 is fastened and connected to form a state of being tightly closed. At least one engaging mechanism 300 includes a first engaging portion 310 and a second engaging portion 320 .

Figure 4 and Figure 5 are schematic diagrams showing the third embodiment of the solid state hard disk of the present invention; in this embodiment, the second housing 200 is close to the first side wall 122 of the first housing 100 on the second panel 210 At the position of the engaging part 310, the second side wall 222 of the second housing 200, the second engaging part 320 or the engaging structure 330, an unlimited number but at least one second through hole 250 is selectively opened. When fastening the first housing 100 and the second housing 200, an auxiliary tool such as a screwdriver can be inserted through the second through hole 250, and the first engaging part 310 can be pushed out of the second engaging part 320 by using the auxiliary tool, so that The fastening structure 330 is released to complete the disassembly and separation of the first casing 100 and the second casing 200 .

The second through hole 250 is preferably also called a maintenance hole, which is convenient for multiple maintenance and disassembly or repeated disassembly of the solid state hard disk, and can be used for multiple maintenance and rework without damaging the fastening structure, or the second through hole 250 It can also be regarded as a quick-release design, so that the solid-state hard drive can be quickly disassembled. selectivity Alternatively, an unlimited number but at least one first locking portion 310, second locking portion 320 or locking structure 330 may also be selected on the first housing 100 at a position close to the first locking portion 310, the second locking portion 320 or the locking structure 330. A through hole serves as a service hole.

The second housing 200 is also provided with an unlimited number of attachment holes 260 on the second panel 210 or the second side walls 222 and 224, so as to provide the second housing 200 and the whole set of solid state hard disks 10 through, for example, but Not limited to screws, but attached to and locked on the host device. A plurality of reinforcing ribs 180 are selectively formed on the inner side of the first housing 100 to enhance the overall structural strength of the first housing 100 and the second housing 200 .

Figure 6 is a schematic diagram showing the functional block of the storage unit included in the solid state hard drive of the present invention; for example, the basic structure of the storage unit 400 includes a circuit board (PCB) 401, a connector 403, a main control chip 405, a random access memory A bulk chip 407, a non-volatile memory array 411 composed of a plurality of non-volatile memory chips 409 and a plurality of capacitors 413, each component is mounted on the circuit substrate 401 using, for example but not limited to, a surface mount method (SMT) On one side or both sides, these non-volatile memory particles are preferably such as but not limited to flash memory (flash memory), flash memory covers such as but not limited to 3D NAND flash memory, V-NAND flash memory, QLC NAND flash memory, TLC NAND flash memory, MLC NAND flash memory, SLC NAND flash memory.

The connector 403 has a socket structure 415 composed of a plurality of pins, which can be plugged and electrically connected to the solid state disk slot of the host device. The transmission interface specification of the connector 403 covers such as but not limited to PCIe, NVMe, M.2, U.2, mSATA, SATA, SATA Express, AHCI, UATA, ZIF, IDE, CF, CFast, etc., the storage unit 400 receives power supply from the host device through the connector 403, and from the host device through the connector 403 The host device receives commands and signals, and the master The chip 405 controls, manages, and schedules hundreds of millions of memory cells in the non-volatile memory array 411, and reads and writes data according to instructions. The main control chip 405 is preferably a system-on-a-chip (SoC).

The random access memory chip 407 is an optional component. In some embodiments, the storage unit 400 is not equipped with the random access memory chip 407, which can reduce the manufacturing cost, but the random access memory chip 407 can be equipped to improve the non-volatile The read and write speed of the memory array 411 can also play the role of a data buffer. The non-volatile memory array 411 is installed on one or both sides of the circuit substrate 401 in a single-sided or double-sided configuration. The mode of double-sided configuration will effectively increase the memory capacity of the solid-state hard disk. A plurality of capacitors 413 are installed on one side or both sides of the circuit substrate 401 to control the main control chip 405, the random access memory chip 407, and the non-volatile memory. Components such as the memory array 411 provide power-off protection during reading and writing.

The circuit substrate 401 is provided with, for example, an unlimited number of installation positioning holes 417, which can provide, for example, screws or studs to pass through, so that the circuit substrate 401 and the storage unit 400 can be fixed and positioned on the second housing 200, correspondingly, the second The housing 200 is provided with a number of assembly positioning holes 270 corresponding to the installation positioning holes 417 on the second panel 210, so as to fix and position the storage unit 400 on the second housing 200, so that the storage unit 400 is configured on the first In the accommodating space formed by the casing 100 and the second casing 200 .

The present invention proposes to be used in solid-state hard disk shells, to combine the first shell and the second shell with a snap-in mechanism instead of screw locking, and further overcome several shortcomings in the snap-in mechanism, including the snap-in mechanism It is not resistant to repeated disassembly, it is easy to break after repeated disassembly, and it is also easy to be damaged during disassembly. Due to the small size of the solid state drive, the size of the locking mechanism is too small and it is not easy to disassemble.

The above embodiments of the present invention can be arbitrarily combined or replaced with each other, thereby deriving more implementation forms, but none of them depart from the scope of protection intended by the present invention. Hereby further provide Many embodiments of the present invention are as follows:

Embodiment 1: A solid state hard disk, which includes: a first housing with a first engaging portion; a second housing with a second engaging portion corresponding in position to the first engaging portion, and fit with the first housing; and a storage unit, which is arranged between the first housing and the second housing, wherein the first engaging part and the second engaging part are combined A fastening structure is formed, and the first casing and the second casing are fixedly connected to each other through the fastening structure.

Embodiment 2: The solid-state hard disk as described in Embodiment 1 also includes: the first casing also has a first panel and a first side wall arranged perpendicular to the first panel, and the first side wall extends from the first panel The edge is vertically arranged toward the direction of the storage unit, and the first engaging portion is arranged on the first side wall; the second casing also has a second panel and a second sidewall arranged perpendicular to the second panel, the second The side wall is vertically arranged from the edge of the second panel toward the direction of the storage unit, and the second locking part is arranged on the second side wall; the first locking part is formed by processing the first side wall; or the second locking part is formed by processing the first side wall; The two locking parts are formed by processing the second side wall.

Embodiment 3: The solid-state hard disk as described in Embodiment 2 further includes: the first housing is provided with a first through hole at a position close to the fastening structure on the first panel; or the second housing is provided at the position A second through hole is opened on the second panel at a position close to the fastening structure.

Embodiment 4: As described in Embodiment 3, the solid state hard disk, the first through hole provides a first tool to enter through the first through hole to release the fastening structure, and the second through hole provides a second tool to enter through the second through hole. The through hole enters to release the snap-fit structure.

Embodiment 5: The solid-state hard disk as described in Embodiment 1 also includes: the second casing also has an attachment hole for the second casing to be attached to the host device; or the second casing also has an assembly location A hole is provided for the storage unit to be attached to the second housing.

Embodiment 6: The solid state hard disk as described in Embodiment 1, the first engaging part is selected from male fasteners, buckle parts, snap parts, clip parts, tenon parts, hook parts, clip parts, protrusions One of points, protrusions, female fasteners, card grooves, through holes, card connection holes, card slots, grooves, depressions and blind holes, the second engaging part is selected from male fasteners, card fasteners, card Fittings, clips, tenons, hooks, clips, bumps, protrusions, female fasteners, grooves, through holes, holes, slots, grooves, depressions, and blind holes one.

Embodiment 7: As described in Embodiment 1, the solid state hard disk, the material of the first casing and the second casing is selected from polycarbonate (PC) material, acrylonitrile-butadiene-styrene copolymer ( ABS) materials, polycarbonate-acrylonitrile-butadiene-styrene copolymer mixture (PC/ABS) composite materials, composite materials based on acrylonitrile-butadiene-styrene copolymers, alloy materials and combinations thereof one.

Embodiment 8: The solid-state hard disk as described in Embodiment 1, the storage unit includes a circuit substrate, a non-volatile memory array including a plurality of non-volatile memories disposed on the circuit substrate, and a connector.

Embodiment 9: The solid-state hard disk as described in embodiment 8, these non-volatile memory systems are selected from 3D NAND flash memory, V-NAND flash memory, QLC NAND flash memory, TLC NAND flash memory one of MLC NAND flash memory and SLC NAND flash memory, the transmission interface specification used by the connector is selected from PCIe interface, NVMe interface, M.2 interface, U.2 interface, mSATA interface, SATA One of interface, SATA Express interface, AHCI interface, UATA interface, ZIF interface, IDE interface, CF interface and CFast interface.

Embodiment 10: A solid state hard disk, which includes: at least one engaging mechanism, which includes a first engaging portion and a second engaging portion corresponding to each other in position; a first housing, which has the first engaging portion a locking part; a second housing, which has the second locking part, and fits with the first housing; and a solid state storage unit, which is arranged between the first housing and the second housing Between, wherein the first casing and the second casing are buckled and connected to each other through the at least one engaging mechanism.

The various embodiments of the present invention can be combined or replaced arbitrarily with each other, thereby deriving more implementation forms, but none of them depart from the intended protection scope of the present invention, and the definition of the protection scope of the present invention is fully defined by the patent scope of the present invention application The recorder shall prevail.

200: second shell

210: second panel

223, 224: the second side wall

230: second connector opening

240: Connector opening

250: Second through hole

260: Attachment hole

270: Assembly positioning hole

Claims (10)

A solid state hard disk, comprising: a first shell, which has a first engaging portion; a second shell, which has a second engaging portion corresponding in position to the first engaging portion and a The second working opening is fitted with the first housing; and a storage unit is arranged between the first housing and the second housing, wherein the first engaging portion and the second locking The joint parts are combined to form a fastening structure, the first housing and the second housing are firmly connected to each other through the fastening structure, and a maintenance tool is inserted into the second working opening to contact the first fastening part, so as to directly withdraw the first engaging part from the second engaging part to release the fastening structure. The solid-state hard disk according to claim 1, further comprising one of the following: the first casing also has a first panel and a first side wall perpendicular to the first panel, and the first side wall extends from the The edge of the first panel is vertically arranged toward the direction of the storage unit, and the first locking part is arranged on the first side wall; the second casing also has a second panel and a first panel perpendicular to the second panel. Two side walls, the second side wall is vertically arranged from the edge of the second panel toward the direction of the storage unit, the second locking part is arranged on the second side wall; the first locking part is processed by the first side wall formed; and the second engaging portion is formed by processing the second side wall. The solid-state hard disk according to claim 2, further comprising one of the following: the first casing defines a first panel at a position close to the buckling structure a working opening; and a second working opening is defined in the second shell at a position where the second panel is close to the fastening structure. The solid-state hard disk as described in claim 3, wherein the first working opening provides a first tool to enter through the first working opening to release the fastening structure, and the second working opening provides a second tool to enter through the second working opening. The working opening enters to release the snap-fit. The solid-state hard disk as claimed in claim 1, further comprising one of the following: the second casing also has an attachment hole for the second casing to be attached to a host device; and the second casing There is also an assembly positioning hole for the storage unit to be attached to the second casing. The solid-state hard disk as described in claim 1, wherein the first engaging part is selected from a male fastener, a fastener, a fastener, a fastener, a tenon, a hook, One of a clamping piece, a convex point, a protrusion, a female fastener, a clamping groove, a through hole, a clamping hole, a clamping groove, a groove, a depression and a blind hole, the first The two engaging parts are selected from a male fastener, a fastener, a fastener, a fastener, a mortise, a hook, a fastener, a bump, a protrusion, and a One of a female fastener, a locking groove, a through hole, a locking hole, a locking groove, a groove, a depression and a blind hole. The solid state drive as described in claim 1, wherein the material of the first casing and the second casing is selected from a polycarbonate (PC) material, an acrylonitrile-butadiene-styrene copolymer ( ABS) material, poly One of a composite material of carbonate-acrylonitrile-butadiene-styrene copolymer (PC/ABS), a composite material based on acrylonitrile-butadiene-styrene copolymer, an alloy material and a combination thereof. The solid-state hard disk according to claim 1, wherein the storage unit includes a circuit substrate, a non-volatile memory array including a plurality of non-volatile memories disposed on the circuit substrate, and a connector. The solid-state hard disk as described in claim 8, wherein the non-volatile memory systems are selected from a 3D NAND flash memory, a V-NAND flash memory, a QLC NAND flash memory, a TLC NAND flash memory One of flash memory, an MLC NAND flash memory and a SLC NAND flash memory, the transmission interface specification used by the connector is selected from a PCIe interface, an NVMe interface, an M.2 interface, a U .2 Interface, one of mSATA interface, one SATA interface, one SATA Express interface, one AHCI interface, one UATA interface, one ZIF interface, one IDE interface, one CF interface and one CFast interface. A solid state hard disk, comprising: at least one engaging mechanism, which includes a first engaging portion and a second engaging portion corresponding to each other in position; a first housing, which has the first engaging portion; a second housing, which has the second engaging portion corresponding to the first engaging portion in position and a second working opening, and fits with the first housing; and a solid state storage unit, It is disposed between the first casing and the second casing, wherein the first casing and the second casing are fastened together through the at least one engaging mechanism Therefore, a maintenance tool contacts the first engaging portion by protruding into the second working opening, so as to directly exit the first engaging portion from the second engaging portion to release the engaging mechanism.

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