CN211505970U

CN211505970U - QSFP28 optical module shell structure

Info

Publication number: CN211505970U
Application number: CN202020531885.9U
Authority: CN
Inventors: 路绪刚
Original assignee: HEBEI HYMAX OPTOELECTRONIC Inc
Current assignee: HEBEI HYMAX OPTOELECTRONIC Inc
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-09-15
Anticipated expiration: 2030-04-10

Abstract

The application discloses QSFP28 optical module shell structure includes: the optical module comprises a bottom shell, an upper shell, an unlocking part, an adapter and a return spring, wherein the bottom shell and the upper shell are assembled to form an optical module cavity for accommodating a functional circuit board and an optoelectronic device, the unlocking part can be slidably mounted on the optical module and can unlock the optical module and withdraw from a host device when the unlocking part is pulled, and the adapter is fixedly mounted in the optical module cavity and used for inserting and fixing an optical joint and inserting and locking an MPO optical fiber jumper connector. According to the QSFP28 optical module shell structure, a functional circuit board, an optoelectronic device and an adapter can be stably installed in a cavity of an optical module under the condition that the occupied space is smaller; the unlocking part can enable the optical module to be locked and unlocked in the host device simply, stably and smoothly; the bottom shell, the upper shell, the unlocking part and the adapter are convenient and quick to mount and dismount, and can be repeatedly used, so that the cost is saved.

Description

QSFP28 optical module shell structure

Technical Field

The application relates to the technical field of optical communication, in particular to a QSFP28 optical module shell structure.

Background

The steady development of the global telecommunication industry and the steady growth of broadband users lay a solid foundation for the development of the optical communication industry. With the continuous improvement of the global bandwidth demand and the expansion of the application fields of data centers and security monitoring optical communication industries, the optical fiber broadband access has become the mainstream communication mode. Under the promotion of popularization of terminals such as smart phones and the like and applications such as video and cloud computing, telecom operators continuously invest in building and upgrading mobile broadband networks and optical fiber broadband networks, and the investment scale of optical communication equipment is further enlarged.

The rapid development of the optical communication industry drives the updating of the optical module. Under the market competition environment where optical communication is increasingly intense at present, the demand of communication equipment for reducing the size of the equipment and increasing the interface density is also increasing. To meet this demand, optical modules are also being developed in a small package with high integration. Such as XFP, QSFP (small Pluggable optical module), QSFP +, CFP/CFP2/CFP4, QSFP28, etc. are all optical modules with small-sized Pluggable high-density interfaces, where QSFP28 is suitable for 4 × 25GE access ports, provides four high-band interconnection channels, and each channel has the highest transmission rate and can achieve 40 Gbps. The QSFP28 optical module can be directly upgraded to 100G from 25G without passing through 40G, so that the wiring system of the data center is greatly simplified, the cost and the cable density of the wiring system are reduced, and a more cost-effective solution is provided for enterprise upgrading and Ethernet connection. Therefore, a shell structure of an optical module of QSFP28 is needed, which enables an optoelectronic device, a functional circuit, an optical connector and the like of the optical module to be stably fixed in a cavity of the optical module, enables the optical module to be used in combination with optical fiber communication equipment, converts an optical signal of the optical fiber communication equipment into an electrical signal through the optoelectronic device, transmits the electrical signal to a functional circuit board, receives the electrical signal from the functional circuit board and communicates with a circuit board in a host device, and conversely, transmits the electrical signal from the circuit board in the host device to the functional circuit board in the optical module, and converts the electrical signal into an optical signal through the optoelectronic device and transmits the optical signal to the optical fiber communication; the optical module is stably locked in the host device through the unlocking component in the optical module shell structure, and the optical module is smoothly unlocked and withdrawn from the host device through the unlocking component.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model aims at providing a QSFP28 optical module shell structure, makes photoelectronic device, functional circuit board and the optical splice of optical module etc. stabilize in the cavity of optical module, through the unblock part in the optical module shell structure, makes the firm lock of optical module in the host computer device to make the optical module unblock and withdraw from the host computer device through the unblock part.

In order to achieve the above object, an embodiment of the present invention provides a QSFP28 optical module housing structure, including: the optical module comprises a bottom shell, an upper shell, an unlocking part, an adapter and a return spring, wherein the bottom shell and the upper shell are assembled to form an optical module cavity for accommodating a functional circuit board and an optoelectronic device of the optical module, the unlocking part can be slidably arranged On the optical module and can unlock the optical module and withdraw from a host device when the unlocking part is pulled, the adapter is fixedly arranged in the optical module cavity and is used for inserting and fixing an optical connector and an MPO (Multi-Fiber Push On) optical Fiber jumper connector, and the optical module is characterized in that,

the bottom shell is provided with a first accommodating space corresponding to the unlocking part on one side face, the first accommodating space is provided with a locking surface, a sliding groove, a spring groove and an accommodating groove, the locking surface is used for being matched with a spring plate lock catch on a metal cage in a host device to lock the optical module in the metal cage, the sliding groove is used for providing a sliding route of the unlocking part, the spring groove is used for accommodating a return spring to provide a reset force of the unlocking part, an opening of the accommodating groove is formed in the locking surface, the bottom shell is further provided with a stop block and a part of installing grooves, the stop block is used for clamping the optical connector, and the part of installing grooves are used for installing the adapter;

the side face of one end of the upper shell is provided with a second accommodating space corresponding to the first accommodating space, the accommodating space formed by matching the first accommodating space with the second accommodating space accommodates the unlocking part, the unlocking part slides in the accommodating space to unlock the optical module, the second accommodating space is provided with a stroke limiting groove for limiting the stroke of the unlocking part, one end of the upper shell is also provided with a partial mounting groove, and the partial mounting groove of the upper shell is matched with the partial mounting groove of the bottom shell to form a complete mounting groove for accommodating and fixing the adapter;

the unlocking part is provided with an unlocking rod and a handle, the unlocking rod is made of metal materials and is provided with a left sliding rod, a right sliding rod and a connecting cross beam, the left sliding rod and the right sliding rod are symmetrically arranged at two sides of the connecting cross beam, an unlocking wedge, a sliding block, a spring block, a stroke limiting block and a handle block are symmetrically arranged on the left sliding rod and the right sliding rod, the unlocking wedge is accommodated in the accommodating groove and slides outwards to jack the elastic sheet lock catch when unlocking, the sliding block is accommodated in the sliding groove and slides in the sliding groove when unlocking, a sliding route is provided for the unlocking part, the spring block is accommodated in the spring groove and is abutted against one end of the reset spring, the stroke limiting block is accommodated in the stroke limiting groove and is matched with the stroke limiting groove to limit the sliding stroke of the unlocking part when unlocking is carried out, and the handle block is provided with a through hole, and is processed into a whole with the handle; the handle is made of rubber materials and is provided with a handheld surface and two symmetrical pull arms, one end of each pull arm and the handle block are processed into a whole, the unlocking rod and the handle form an integral component to form the unlocking part, the handheld surface is arranged at the other end of each pull arm to provide external tension so as to pull the unlocking part to unlock the optical module, and the handheld surface is provided with a handheld protrusion and a LOGO protrusion;

the adapter is accommodated in the complete mounting groove, is provided with an optical connector port, an MPO optical fiber jumper wire port and an elastic arm hook and is used for inserting and pulling the optical connector and the MPO optical fiber jumper wire connector.

In the QSFP28 optical module housing structure, the two side surfaces of the bottom shell at one end are symmetrically provided with the first accommodating space, correspondingly, the two side surfaces of the upper shell at one end are also symmetrically provided with the second accommodating space, and the first accommodating space and the second accommodating space are matched to form a symmetrical accommodating space for accommodating the left slide bar and the right slide bar.

In the QSFP28 optical module housing structure, the main bodies of the left slide bar and the right slide bar are flat strip-shaped; the unlocking wedge body is arranged on the end face of one end of the main body and corresponds to the containing groove; the handle block is arranged at the other end of the main body and corresponds to the pull arm; the sliding block is arranged on the lower side of the main body and corresponds to the sliding groove; the stroke limiting block is arranged on the upper side of the main body and corresponds to the stroke limiting groove; the spring block is arranged on the inner side of the main body and corresponds to the spring groove.

In the QSFP28 optical module housing structure, the bottom case is further provided with a positioning column, a lower positioning surface, a bottom case label slot and an identification protrusion, and the positioning column and the lower positioning surface are arranged in a cavity of the bottom case and used for clamping and fixing a functional circuit board; the bottom shell label grooves are symmetrically arranged on two side surfaces of the bottom shell and used for sticking label descriptions; the identification bulge is arranged on the inner bottom surface of the cavity of the bottom shell and used for identifying and explaining the production date of the optical module and the LOGO of a company.

In the QSFP28 optical module housing structure, the upper case is further provided with an upper positioning surface and a label slot, and the upper positioning surface is matched with the lower positioning surface in the bottom case to clamp and fix the functional circuit board; the label slot is a groove arranged on the outer surface of the upper shell and used for sticking label instructions.

According to the QSFP28 optical module shell structure, a functional circuit board, an optoelectronic device and an adapter can be stably installed in a cavity of an optical module under the condition that the occupied space is smaller; the unlocking part can enable the optical module to be locked and unlocked in the host device simply, stably and smoothly; the bottom shell, the upper shell, the unlocking part and the adapter are convenient and quick to mount and dismount, and can be repeatedly used, so that the cost is saved.

Drawings

Fig. 1 is an exploded view of a QSFP28 optical module housing structure according to an embodiment of the present invention;

fig. 2 is an exploded view of a QSFP28 optical module housing structure according to an embodiment of the present invention;

FIG. 3 is a first assembly diagram of an embodiment of a QSFP28 optical module housing structure according to the present invention;

fig. 4 is a second assembly diagram of an embodiment of a QSFP28 optical module housing structure according to the present application:

fig. 5 is a third assembly diagram (unlocked state) of an embodiment of the QSFP28 optical module housing structure according to the present application;

FIG. 6 is an assembly diagram of a QSFP28 optical module housing structure according to an embodiment of the present invention (with the upper case removed);

FIG. 7 is a schematic bottom view of a QSFP28 optical module housing structure according to the present invention;

FIG. 8 is a first schematic diagram of an upper case of a QSFP28 optical module case structure according to the present invention;

fig. 9 is a second schematic top case diagram of a QSFP28 optical module case structure according to the present application;

FIG. 10 is a schematic diagram of an unlocking portion of a QSFP28 optical module housing structure according to the present application;

FIG. 11 is a schematic view of an unlocking lever in an unlocking portion of a QSFP28 optical module housing structure according to the present application;

fig. 12 is a schematic view of a pull handle in an unlocking portion of a QSFP28 optical module housing structure according to the present application;

FIG. 13 is a first schematic diagram of an adapter according to an embodiment of the QSFP28 optical module housing structure of the present application;

FIG. 14 is a second schematic diagram of an adapter according to an embodiment of the QSFP28 optical module housing structure of the present application;

FIG. 15 is a first optical-electrical component schematic diagram of an embodiment of a QSFP28 optical module according to the present application;

FIG. 16 is a second optical-electrical component schematic diagram (with an adapter) of an embodiment of a QSFP28 optical module according to the present application;

fig. 17 is a schematic diagram of a metal cage in a host device matched with an embodiment of a QSFP28 optical module according to the present application.

The reference numerals are explained below:

100 bottom shell

110 first receiving space 111, locking surface 112, sliding groove 113, spring groove 114, receiving groove 120, part of mounting groove 130, stopper 140, bottom cover label groove 170 identification protrusion of positioning column 150, bottom cover label groove 160

200 upper case

210 second accommodation space 211 distance limiting groove 220 part mounting groove 230 upper positioning surface 240 label groove

300 unlocking part

310 unlocking rod 311, left sliding rod 312 and right sliding rod 313 are connected with crossbeam 311-1 unlocking wedge 311-2 sliding block 311-3 spring block 311-4 stroke limiting block 311-5 handle block

320 handle 321, handle arm 322, handle 323, handle protrusion 324LOGO protrusion

400 adapter 410 optical connector port 420MPO optical fiber jumper port 421 spring arm hook

500 return spring

600 screw

700 dust plug

800 photoelectric part

810 optoelectronic device 820 function circuit board 821 locating slot 830 optical connector 831 block surface 840 optical ribbon fiber 850 protective cover

900 metal cage 910 spring buckle

Detailed Description

Specific embodiments of the present application will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present application.

Fig. 1 and fig. 2 are exploded views of an embodiment of a QSFP28 optical module housing structure of the present application, fig. 3 and fig. 4 are assembled effect views of an embodiment of a QSFP28 optical module housing structure of the present application, fig. 5 is a schematic view of an unlocked state of an embodiment of a QSFP28 optical module housing structure of the present application, fig. 6 is an assembled schematic view of a QSFP28 optical module housing structure of the present application after an upper case 200 is removed, fig. 7 to fig. 14 are schematic views of components in a QSFP28 optical module housing structure of the present application, fig. 15 and fig. 16 are assembled schematic views of a functional circuit board 820, an optoelectronic device 810, an optical connector 830 and an adapter 400 of an embodiment of a QSFP28 optical module of the present application, and fig. 17 is a schematic view of a metal cage 900 matched with an embodiment of a QSFP28 optical module of the present application. As shown in the above figures, the optical module includes a bottom case 100, an upper case 200, an unlocking unit 300, and an adapter 400.

As shown in fig. 1 and fig. 2, the bottom case 100 and the top case 200 are assembled by screws 600 to form a cavity for accommodating the optoelectronic device 810, the functional circuit board 820, the optical connector 830 and the adaptor 400 of the optical module.

Referring to fig. 7, the bottom chassis 100 is provided with a first receiving space 110 corresponding to the left sliding rod 311 and the right sliding rod 312 on two side surfaces of one end, the first receiving space 110 has a locking surface 111, a sliding groove 112, a spring groove 113 and a receiving groove 114, the locking surface 111 cooperates with a spring catch 910 on the metal cage 900 to lock the optical module, the sliding groove 112 provides a sliding path of the unlocking unit 300, the spring groove 113 is used for receiving a return spring 500 to provide a return force of the unlocking unit 300, the receiving groove 114 is used for receiving an unlocking wedge 311-1, the bottom chassis 100 is further provided with a portion of the mounting groove 120 and a stopper 130, a portion of the mounting groove 120 is used for mounting the adapter 400, and the stopper 130 is used for stopping the optical connector 830.

Referring to fig. 8, the upper case 200 is provided with a second accommodating space 210 corresponding to the first accommodating space 110 at two side surfaces of one end, the accommodating space formed by the first accommodating space 110 and the second accommodating space 210 in a matching manner accommodates the unlocking rod 310, the unlocking rod 310 slides in the accommodating space to unlock the optical module, the second accommodating space 210 is provided with a stroke limiting groove 211 for limiting the stroke of the unlocking rod 310, the upper case 200 is further provided with a partial mounting groove 220 at one end, and the partial mounting groove 120 and the partial mounting groove 220 are matched to form a complete mounting groove for accommodating the fixed adapter 400.

Referring to fig. 10 to 12, the unlocking part 300 is provided with an unlocking rod 310 and a handle 320, the unlocking rod 310 is made of metal material and is provided with a left sliding rod 311, a right sliding rod 312 and a connecting beam 313, the connecting beam 313 connects the left sliding rod 311 and the right sliding rod 312 into a whole to form the unlocking rod 310, an unlocking wedge 311-1, a sliding block 311-2, a spring block 311-3, a stroke limiting block 311-4 and a handle block 311-5 are symmetrically arranged on the left sliding rod 311 and the right sliding rod 312, the unlocking wedge 311-1 is accommodated in the accommodating groove 114, and slides outwards to jack up a spring sheet lock 910 locked on the locking surface 111 during unlocking; the slide block 311-2 is accommodated in the slide groove 112, slides in the slide groove 112 during unlocking, and provides a sliding path for the unlocking part 300; the spring block 311-3 is accommodated in the spring slot 113 and abuts against one end of the return spring 500, and the spring block 311-3 is driven by the unlocking part 300 to compress the return spring 500 during unlocking; the stroke limiting block 311-4 is accommodated in the stroke limiting groove 211 to limit the sliding stroke of the unlocking part 300; the handle block 311-5 is provided with a through hole and is processed with the handle 320 into a whole; the handle 320 is made of rubber materials and is provided with a pull arm 321 and a hand-held surface 322, one end of the pull arm 321 and the handle block 311-5 are processed into a whole, the rubber materials of the handle 320 are poured into the outer surface of the handle block 311-5 and the through hole on the handle block 311-5, the pull arm 321 and the handle block 311-5 can be firmly integrated into a whole, and the unlocking rod 310 and the handle 320 form an integrated part to form the unlocking part 300; the handheld surface 322 is arranged at the other end of the pull arm 321, provides external tension for the unlocking part 300 to pull the unlocking part 300 to unlock the optical module, and is provided with the handheld protrusion 323 and the LOGO protrusion 324, the handheld protrusion 323 provides friction resistance to prevent slipping when fingers pull the handheld surface 322, and the LOGO protrusion 324 is used for marking a trademark of the optical module.

Referring to fig. 13 and 14 in combination, the adapter 400 is accommodated and fixed in a complete installation slot formed by assembling a part of the installation slot 120 and a part of the installation slot 220, and is provided with an optical connector port 410, an optical fiber jumper port 420 and a spring arm hook 421, wherein the optical connector port 410 is used for plugging an optical connector 830, the optical fiber jumper port 420 is used for plugging and unplugging an MPO optical fiber jumper connector, and the spring arm hook 421 is used for locking or unlocking the MPO optical fiber jumper connector.

As shown in fig. 7 to 9, the first accommodating spaces 110 formed on two sides of one end of the bottom case 100 are symmetrical, and correspondingly, the second accommodating spaces 210 formed on two sides of one end of the upper case 200 are also symmetrical, and the first accommodating spaces 110 and the second accommodating spaces 210 cooperate to form symmetrical accommodating spaces for accommodating the left sliding bar 311 and the right sliding bar 312.

As shown in fig. 10 to 12, the main bodies of the left sliding rod 311 and the right sliding rod 312 are flat strips, and the unlocking wedge 311-1 is disposed on an end surface of one end of the main body, corresponding to the accommodating groove 114; the handle block 311-5 is arranged on the end surface of the other end of the main body and is processed into a whole with the pull arm 321; the slide block 311-2 is arranged at the lower side of the main body and corresponds to the sliding groove 112; the spring block 311-3 is disposed at the inner side of the body corresponding to the spring groove 113, and the stroke limiting block 311-4 is disposed at the upper side of the body corresponding to the stroke limiting groove 211.

Referring to fig. 7, the bottom case 100 is provided with a positioning column 140, a lower positioning surface 150, a label slot 160 and an identification protrusion 170, wherein the positioning column 140 and the lower positioning surface 150 are used for fixing the functional circuit board 820; the label slots 160 are symmetrically arranged on two side surfaces of the bottom case 100 and used for sticking label descriptions; the mark protrusion 170 is disposed on the inner bottom surface of the cavity of the bottom case 100, and is used for explaining the date of manufacture and LOGO (pattern) of the optical module.

Referring to fig. 8 and 9, the upper case 200 has an upper positioning surface 230 and a label slot 240, and the upper positioning surface 230 and the lower positioning surface 150 cooperate with each other to fix the functional circuit board 820; the label slot 240 is a groove provided on the outer surface of the upper case 200 for attaching a label guide.

With reference to fig. 3 and fig. 17, the following describes an unlocking and recovering process of an embodiment of the QSFP28 optical module housing structure according to the present invention. Before unlocking, it is assumed that the optical module is inserted into the metal cage 900 shown in fig. 17, and the locking surface 111 on the side surface of the bottom chassis 100 is locked by the elastic sheet lock 910 on the metal cage 900, so as to lock the optical module in the metal cage 900.

Next, when unlocking is required, pulling force is applied to the handheld surface 322 to pull the unlocking portion 300, the unlocking portion 300 compresses the return spring 500 to slide outwards, the unlocking wedge 311-1 is driven to slide outwards, the unlocking wedge 311-1 jacks up the elastic sheet lock 910 locked on the locking surface 111 to separate from the locking surface 111, so that the optical module is unlocked, meanwhile, the stroke limiting block 311-4 slides to one end of the stroke limiting groove 211 in the stroke limiting groove 211 and stops sliding, the unlocking portion 300 stops sliding relative to the optical module, at this time, the unlocking portion 300 is pulled outwards, and the unlocking portion 300 drives the whole optical module to exit the metal cage 900, so that the optical module is unlocked and exits the metal cage 900.

After the optical module is unlocked and pulled out of the metal cage 900, the external force applied to the handheld surface 322 disappears, the restoring spring 500 in the compressed state in the spring groove 133 starts to release the restoring elastic force due to the external force, and the pushing spring block 311-3 slides backward to reset by pushing the unlocking part 300.

As shown in fig. 1, 15 and 16, the QSFP28 optical module according to the present application further includes a dust plug 700 and an optical electrical component 800, where the optical electrical component 800 includes: optoelectronic device 810, functional circuit board 820, optical connector 830, optical ribbon fiber 840 and protective cover 850, where functional circuit board 820 is provided with positioning groove 821, and positioning groove 821 cooperates with positioning pillar 140 to position functional circuit board 820 in the optical module cavity; the optoelectronic device 810 is coupled and mounted on the device of the functional circuit board 820, and is used for converting optical signals and electric signals; the optical connector 830 is fixed to the optical connector port 410 of the adapter 400 in an inserting manner, and is provided with a stopper surface 831, after the stopper surface 831 is blocked by the stopper 130, the optical connector 830 is fixed in the optical connector port 410 in a stable manner, and performs optical signal transmission with the MPO optical fiber jumper connector; the optical ribbon fiber 840 connects the optoelectronic device 810 and the optical connector 830 for optical signal transmission; the passport 850 is attached to the optoelectronic device 810 to protect the optoelectronic device 810; the dust plug 700 is inserted into the MPO fiber jumper port 420 of the adapter 400 in the non-operating state, and is used to protect the optical connector 830 in the non-operating state of the optical module.

The present invention has been described in terms of the preferred embodiment, and not as a limitation, it is to be understood that the terminology used is intended to be in the nature of words of description and illustration, rather than of limitation. As the present application may be embodied in several forms without departing from the spirit or essential characteristics thereof, it should also be understood that the above-described embodiments are not limited by any of the details of the foregoing description, but rather should be construed broadly within its spirit and scope as defined in the appended claims, and therefore all changes and modifications that fall within the meets and bounds of the claims, or equivalences of such meets and bounds are therefore intended to be embraced by the appended claims.

Claims

1. A QSFP28 optical module housing structure, comprising: the optical module comprises a bottom shell, an upper shell, an unlocking part, an adapter and a return spring, wherein the bottom shell and the upper shell are assembled to form an optical module cavity for accommodating a functional circuit board and an optoelectronic device, the unlocking part can be slidably arranged on the optical module and can unlock the optical module and withdraw from a host device when the unlocking part is pulled, the adapter is fixedly arranged in the optical module cavity and is used for inserting and fixing an optical joint and inserting and locking an MPO optical fiber jumper connector, and the optical module is characterized in that,

2. The QSFP28 optical module housing structure of claim 1, wherein the bottom shell has the first receiving space symmetrically disposed on two sides of one end, and correspondingly, the upper shell has the second receiving space symmetrically disposed on two sides of one end, and the first receiving space and the second receiving space cooperate to form a symmetric receiving space for receiving the left sliding rod and the right sliding rod.

3. The QSFP28 optical module housing structure of claim 1, wherein the bodies of said left slide bar and said right slide bar are flat bar-shaped; the unlocking wedge body is arranged on the end face of one end of the main body and corresponds to the containing groove; the handle block is arranged at the other end of the main body and corresponds to the pull arm; the sliding block is arranged on the lower side of the main body and corresponds to the sliding groove; the stroke limiting block is arranged on the upper side of the main body and corresponds to the stroke limiting groove; the spring block is arranged on the inner side of the main body and corresponds to the spring groove.

4. The QSFP28 optical module housing structure of claim 1, wherein the bottom shell is further provided with a positioning column, a lower positioning surface, a bottom shell label slot and an identification protrusion, the positioning column and the lower positioning surface are arranged in a cavity of the bottom shell and used for clamping and fixing a functional circuit board; the bottom shell label grooves are symmetrically arranged on two side surfaces of the bottom shell and used for sticking label descriptions; the identification bulge is arranged on the inner bottom surface of the cavity of the bottom shell and used for identifying and explaining the production date of the optical module and the LOGO of a company.

5. The QSFP28 optical module shell structure of claim 1, wherein the upper shell is further provided with an upper positioning surface and a label slot, and the upper positioning surface is matched with a lower positioning surface in the bottom shell to clamp and press a functional circuit board; the label slot is a groove arranged on the outer surface of the upper shell and used for sticking label instructions.