CN216248436U - Optical module - Google Patents

Abstract

The application provides an optical module, includes: an upper housing; the lower shell is covered and connected with the upper shell to form a wrapping cavity; the circuit board is arranged in the wrapping cavity and is provided with a positioning hole; the fixing support is provided with clamping feet which are connected with the positioning holes in a clamping manner; the upper shell is in abutting connection with the top of the fixed support and used for fixing the circuit board in the wrapping cavity through the fixed support. The application provides an optical module, the circuit board is held through the pressure of fixed bolster and is fixed in the cavity of the parcel that last casing and lower casing formed, compares in through gluing fixed circuit board, makes the fixed of circuit board more convenient, makes things convenient for the dismantlement of circuit board to reprocess simultaneously.

Description

Optical module

Technical Field

The application relates to the technical field of optical fiber communication, in particular to an optical module.

Background

With the development of new services and application modes such as cloud computing, mobile internet, video and the like, the development and progress of the optical communication technology become increasingly important. In the optical communication technology, an optical module is a tool for realizing the interconversion of optical signals and is one of the key devices in optical communication equipment.

An optical module generally includes an upper housing, a lower housing, and a circuit board, wherein the circuit board is enclosed in a package cavity formed by the upper housing and the lower housing, and the circuit board is used for carrying electrical devices, optical devices, and the like and realizing electrical connection between the electrical devices. In order to ensure reliable operation of the optical module, the circuit board needs to be fixed in a wrapping cavity formed by the upper shell and the lower shell.

In order to realize the fixation of the circuit board in the wrapping cavity formed by the upper shell and the lower shell, the fixing modes such as spot gluing fixation and the like can be selected. Although the circuit board can be firmly fixed by the glue dispensing fixing mode, the glue dispensing fixing needs to be performed with high-temperature baking fixing after glue dispensing, so that the working hours are increased; when the optical module is repaired, glue needs to be scraped, the operation is complex, and the circuit board and devices on the circuit board are easy to damage; in addition, the requirement on the assembly size is high. Therefore, the dispensing and fixing method is not suitable for fixing the circuit board in the optical module.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides an optical module, which facilitates the fixation of a circuit board in the optical module.

The application provides an optical module, includes:

an upper housing;

the lower shell is covered and connected with the upper shell to form a wrapping cavity;

the circuit board is arranged in the wrapping cavity and is provided with a positioning hole;

the fixing support is arranged in the wrapping cavity and is provided with a clamping foot, and the clamping foot is connected with the positioning hole in a clamping manner;

the upper shell is in abutting connection with the top of the fixed support and used for fixing the circuit board in the wrapping cavity through the fixed support.

In the optical module that this application provided, go up casing and casing lid down and close to connect and set up circuit board and fixed bolster in the parcel cavity that forms, set up the locating hole on the circuit board, set up the block foot on the fixed bolster, block foot block connection locating hole, the top and the last casing of fixed bolster are contradicted and are connected. When the circuit board is required to be fixed in the wrapping cavity, the fixing support is assembled on the circuit board, the circuit board assembled with the fixing support is arranged in the lower shell, the upper shell and the lower shell are covered, the upper shell extrudes the fixing support, and then the circuit board can be fixed in the wrapping cavity by the fixing support. Consequently, in the optical module that this application provided, the circuit board is held through the pressure of fixed bolster and is fixed in the cavity of the parcel that last casing and lower casing formed, compares in through the fixed circuit board of point gluing, makes the fixed of circuit board more convenient, makes things convenient for the dismantlement of circuit board to repair simultaneously.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a diagram of an optical communication system connection according to some embodiments;

figure 2 is a block diagram of an optical network terminal according to some embodiments;

fig. 3 is a schematic structural diagram of a light module according to some embodiments;

FIG. 4 is an exploded view of a light module according to some embodiments;

FIG. 5 is a schematic structural view of a mounting bracket provided in accordance with some embodiments;

fig. 6 is an exploded view of a mounting bracket and a circuit board according to some embodiments;

FIG. 7 is a first assembly view of a mounting bracket and a circuit board according to some embodiments;

FIG. 8 is a second assembly view of a mounting bracket and circuit board according to some embodiments;

FIG. 9 is a cross-sectional view of FIG. 8;

FIG. 10 is a schematic structural view of a lower housing provided in accordance with some embodiments;

FIG. 11 is a cross-sectional view of a lower housing provided in accordance with some embodiments;

FIG. 12 is a schematic view of an assembly of a lower housing and a circuit board provided in accordance with some embodiments;

FIG. 13 is a cross-sectional view of a lower housing, circuit board and mounting bracket as assembled according to some embodiments;

FIG. 14 is a schematic view of an upper housing and mounting bracket assembly provided in accordance with some embodiments;

fig. 15 is a cross-sectional view of a light module provided in accordance with some embodiments.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present disclosure, the technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure, and it is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

In the optical communication technology, light is used to carry information to be transmitted, and an optical signal carrying the information is transmitted to information processing equipment such as a computer through information transmission equipment such as an optical fiber or an optical waveguide, so that the transmission of the information is completed. Because the optical signal has the passive transmission characteristic when being transmitted through the optical fiber or the optical waveguide, the information transmission with low cost and low loss can be realized. Further, since a signal transmitted by an information transmission device such as an optical fiber or an optical waveguide is an optical signal and a signal that can be recognized and processed by an information processing device such as a computer is an electrical signal, it is necessary to perform interconversion between the electrical signal and the optical signal in order to establish an information connection between the information transmission device such as an optical fiber or an optical waveguide and the information processing device such as a computer.

The optical module realizes the function of interconversion between the optical signal and the electrical signal in the technical field of optical fiber communication. The optical module comprises an optical port and an electrical port, the optical module realizes optical communication with information transmission equipment such as optical fibers or optical waveguides and the like through the optical port, realizes electrical connection with an optical network terminal (such as an optical modem) through the electrical port, and the electrical connection is mainly used for realizing power supply, I2C signal transmission, data signal transmission, grounding and the like; the optical network terminal transmits the electric signal to the computer and other information processing equipment through a network cable or a wireless fidelity (Wi-Fi).

Fig. 1 is a diagram of optical communication system connections according to some embodiments. As shown in fig. 1, the optical communication system mainly includes a remote server 1000, a local information processing device 2000, an optical network terminal 100, an optical module 200, an optical fiber 101, and a network cable 103;

one end of the optical fiber 101 is connected to the remote server 1000, and the other end is connected to the optical network terminal 100 through the optical module 200. The optical fiber itself can support long-distance signal transmission, for example, signal transmission of several kilometers (6 kilometers to 8 kilometers), on the basis of which if a repeater is used, ultra-long-distance transmission can be theoretically achieved. Therefore, in a typical optical communication system, the distance between the remote server 1000 and the optical network terminal 100 may be several kilometers, tens of kilometers, or hundreds of kilometers.

One end of the network cable 103 is connected to the local information processing device 2000, and the other end is connected to the optical network terminal 100. The local information processing apparatus 2000 may be any one or several of the following apparatuses: router, switch, computer, cell-phone, panel computer, TV set etc..

The physical distance between the remote server 1000 and the optical network terminal 100 is greater than the physical distance between the local information processing apparatus 2000 and the optical network terminal 100. The connection between the local information processing device 2000 and the remote server 1000 is completed by the optical fiber 101 and the network cable 103; and the connection between the optical fiber 101 and the network cable 103 is completed by the optical module 200 and the optical network terminal 100.

The optical module 200 includes an optical port and an electrical port. The optical port is configured to connect with the optical fiber 101, so that the optical module 200 establishes a bidirectional optical signal connection with the optical fiber 101; the electrical port is configured to be accessed into the optical network terminal 100, so that the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100. The optical module 200 converts an optical signal and an electrical signal to each other, so that a connection is established between the optical fiber 101 and the optical network terminal 100. For example, an optical signal from the optical fiber 101 is converted into an electrical signal by the optical module 200 and then input to the optical network terminal 100, and an electrical signal from the optical network terminal 100 is converted into an optical signal by the optical module 200 and input to the optical fiber 101.

The optical network terminal 100 includes a housing (housing) having a substantially rectangular parallelepiped shape, and an optical module interface 102 and a network cable interface 104 provided on the housing. The optical module interface 102 is configured to access the optical module 200, so that the optical network terminal 100 establishes a bidirectional electrical signal connection with the optical module 200; the network cable interface 104 is configured to access the network cable 103 such that the optical network terminal 100 establishes a bi-directional electrical signal connection with the network cable 103. The optical module 200 is connected to the network cable 103 via the optical network terminal 100. For example, the optical network terminal 100 transmits an electrical signal from the optical module 200 to the network cable 103, and transmits a signal from the network cable 103 to the optical module 200, so that the optical network terminal 100 can monitor the operation of the optical module 200 as an upper computer of the optical module 200. The upper computer of the Optical module 200 may include an Optical Line Terminal (OLT) and the like in addition to the Optical network Terminal 100.

The remote server 1000 establishes a bidirectional signal transmission channel with the local information processing device 2000 through the optical fiber 101, the optical module 200, the optical network terminal 100, and the network cable 103.

Fig. 2 is a structure diagram of an optical network terminal according to some embodiments, and fig. 2 only shows the structure of the optical module 200 of the optical network terminal 100 in order to clearly show the connection relationship between the optical module 200 and the optical network terminal 100. As shown in fig. 2, the optical network terminal 100 further includes a PCB circuit board 105 disposed in the housing, a cage 106 disposed on a surface of the PCB circuit board 105, and an electrical connector disposed inside the cage 106. The electrical connector is configured to access an electrical port of the optical module 200; the heat sink 107 has a projection such as a fin that increases a heat radiation area.

The optical module 200 is inserted into a cage 106 of the optical network terminal 100, the cage 106 holds the optical module 200, and heat generated by the optical module 200 is conducted to the cage 106 and then diffused by a heat sink 107. After the optical module 200 is inserted into the cage 106, an electrical port of the optical module 200 is connected to an electrical connector inside the cage 106, and thus the optical module 200 establishes a bidirectional electrical signal connection with the optical network terminal 100. Further, the optical port of the optical module 200 is connected to the optical fiber 101, and the optical module 200 establishes bidirectional electrical signal connection with the optical fiber 101.

Fig. 3 is a diagram of an optical module provided in accordance with some embodiments, and fig. 4 is an exploded structural view of an optical module provided in accordance with some embodiments. As shown in fig. 3 and 4, the optical module 200 includes a housing, a circuit board disposed in the housing, and an optical transceiver.

The shell comprises an upper shell 201 and a lower shell 202, wherein the upper shell 201 covers the lower shell 202 to form a wrapping cavity with two openings 204 and 205; the outer contour of the housing generally appears square.

In some embodiments, the lower housing 202 includes a bottom plate and two lower side plates disposed at both sides of the bottom plate and perpendicular to the bottom plate; the upper housing 201 includes a cover plate, and two upper side plates disposed on two sides of the cover plate and perpendicular to the cover plate, and is combined with the two side plates by two side walls to cover the upper housing 201 on the lower housing 202.

The direction of the connecting line of the two openings 204 and 205 may be the same as the length direction of the optical module 200, or may not be the same as the length direction of the optical module 200. For example, the opening 204 is located at an end (left end in fig. 3) of the optical module 200, and the opening 205 is also located at an end (right end in fig. 3) of the optical module 200. Alternatively, the opening 204 is located at an end of the optical module 200, and the opening 205 is located at a side of the optical module 200. Wherein, the opening 204 is an electrical port, and the gold finger of the circuit board 300 extends out of the electrical port 204 and is inserted into an upper computer (such as the optical network terminal 100); the opening 205 is an optical port configured to receive the external optical fiber 101, so that the optical fiber 101 is connected to an optical transceiver inside the optical module 200.

The upper shell 201 and the lower shell 202 are combined in an assembly mode, so that devices such as the circuit board 300 and the optical transceiver can be conveniently installed in the shells, and the upper shell 201 and the lower shell 202 can form packaging protection for the devices. In addition, when the devices such as the circuit board 300 are assembled, the positioning components, the heat dissipation components and the electromagnetic shielding components of the devices are convenient to arrange, and the automatic implementation production is facilitated.

In some embodiments, the upper housing 201 and the lower housing 202 are generally made of metal materials, which is beneficial to achieve electromagnetic shielding and heat dissipation.

In some embodiments, the optical module 200 further includes an unlocking component 203 located on an outer wall of a housing thereof, and the unlocking component 203 is configured to realize a fixed connection between the optical module 200 and an upper computer or release the fixed connection between the optical module 200 and the upper computer.

When the optical module 200 is inserted into the cage of the upper computer, the optical module 200 is fixed in the cage of the upper computer by the lock catch of the unlocking part 203; when the unlocking member 203 is pulled, the latch of the unlocking member 203 moves along with the unlocking member, so that the connection relationship between the latch and the upper computer is changed, the engagement relationship between the optical module 200 and the upper computer is released, and the optical module 200 can be drawn out from the cage of the upper computer.

The circuit board comprises circuit wiring, electronic elements (such as a capacitor, a resistor, a triode and an MOS (metal oxide semiconductor) tube), chips (such as an MCU (microprogrammed control unit), a laser driving chip, an amplitude limiting amplification chip, a Clock Data Recovery (CDR), a power management chip and a data processing chip DSP) and the like.

The circuit board connects the above devices in the optical module 200 together according to circuit design through circuit wiring to realize functions of power supply, electrical signal transmission, grounding, and the like.

The circuit board is generally a hard circuit board, and the hard circuit board can also realize a bearing effect due to the relatively hard material of the hard circuit board, for example, the hard circuit board can stably bear a chip; the hard circuit board can also be inserted into an electric connector in the cage of the upper computer, and in some embodiments disclosed in the application, a metal pin/golden finger is formed on the surface of the tail end of one side of the hard circuit board and is used for being connected with the electric connector; these are not easily implemented with flexible circuit boards.

Flexible circuit boards are also used in some optical modules; the flexible circuit board is generally used in combination with the rigid circuit board, and for example, the rigid circuit board may be connected to the optical transceiver device to supplement the rigid circuit board.

In the embodiment of the present application, in order to ensure reliable operation of the optical module, the optical module further includes a fixing bracket 400, the fixing bracket 400 is a structural member independent from the upper shell 201, the lower shell 202 and the circuit board 300, and the fixing bracket 400 is used to fix the circuit board 300 in a package cavity formed by the upper shell 201 and the lower shell 202. Illustratively, the top of the fixing bracket 400 contacts the upper casing 201, the bottom of the fixing bracket 400 is connected with the circuit board 300 in a clamping manner, and then when the upper casing 201 is assembled on the lower casing 202, the upper casing 201 presses the fixing bracket 400, and then the circuit board 300 is fixed in a packaging cavity formed by the upper casing 201 and the lower casing 202 through the fixing bracket 400.

In the embodiment of the present application, the fixing bracket 400 includes a bracket body and a fastening pin, one side of the bracket body abuts against the upper housing 201, the other side of the bracket body is connected to the fastening pin, and the fastening pin is used for fastening and connecting the circuit board 300. In the embodiment of the present application, the circuit board 300 is provided with corresponding positioning holes, and the engaging pins are engaged with the corresponding positioning holes. In order to avoid the setting of the fixing bracket 400 from affecting the setting of the devices on the circuit board 300, the positioning holes are formed in the side edge of the circuit board 300, and the clamping pins are clamped and connected with the side edge of the circuit board 300.

In some embodiments of the present application, the stent body may be a sheet, strip, or frame-like structure, etc.; the other side of the bracket body can be provided with 1, 2, 3 or 4 clamping feet and the like. In some embodiments of the present application, when the plurality of engaging pins are disposed on the bracket body, the plurality of engaging pins are uniformly distributed on two sides of the length direction of the circuit board 300.

In some embodiments of the present application, the engaging leg includes an engaging leg body and a slot disposed on the engaging leg, one end of the engaging leg body is connected to the bracket body, the other end of the engaging leg body is provided with a slot, and the slot is used for engaging with the circuit board 300, such as engaging with a positioning hole on the circuit board 300. In some embodiments, two opposite slots are disposed at the other end of the engaging script body, such that the other end of the engaging foot body forms an "i" shaped structure to form two slots engaging with the circuit board 300, for example, two slots engaging with the positioning holes on the circuit board 300 are formed.

In some embodiments of the present application, to further facilitate the fixing of the circuit board 300, a support member for supporting the connection circuit board 300 is provided on the lower case 202. Therefore, when the circuit board 300 is fixed, the circuit board 300 may be supported by the supporting members on the lower case 202 and the circuit board 300 may be pressed toward the bottom of the lower case 202 by the fixing brackets, and the circuit board 300 may be fixed by pressing the circuit board 300 in two directions. Further, in some embodiments of the present application, a limiting component may be disposed on the lower housing 202, and the limiting component is connected to the circuit board 300 in a matching manner, so that the positioning of the circuit board 300 during assembly is performed through the limiting component, which is convenient for ensuring the assembly accuracy of the circuit board 300.

In some embodiments of this application, the support component includes a supporting bench and a spacing post, and the casing is down connected to the supporting bench, and spacing post setting is at the top of a supporting bench, and a supporting bench is used for supporting the circuit board, and spacing post is used for the assembly positioning of circuit board 300. The circuit board 300 is provided with a positioning hole for matching with the limiting post, and the limiting post is arranged in the corresponding positioning hole.

In some embodiments of the present application, the corresponding engaging leg is engaged with the same positioning hole of the phase post, and the engaging leg is disposed on one side of the supporting member. Illustratively, the supporting platform is disposed on the bottom plate of the lower housing 202, i.e., the bottom of the supporting platform is connected to the lower housing 202, the top of the supporting platform is connected to the limiting column, a gap is disposed between the supporting platform and the sidewall of the lower housing 202, and the end of the engaging leg is disposed in the gap.

The following is a detailed description of the embodiment of the present application in which the circuit board 300 is fixed by the fixing bracket 400. Fig. 5 is a schematic structural diagram of a fixing bracket according to some embodiments, and fig. 5 shows that in some embodiments of the present application, 4 engaging legs 420 are disposed on a bracket body 410 of a fixing bracket 400, but in this embodiment, the fixing bracket 400 is not limited to be disposed with 4 engaging legs 420, and the natural engaging legs 420 may have the same structure or different structures. The fixing bracket 400 may be formed by die-casting a metal plate, but is not limited thereto.

As shown in fig. 5, in some embodiments of the present application, the fixing bracket 400 includes a bracket body 410, and 4 engaging legs 420 are disposed under the side of the bracket body 410. The bracket body 410 has a frame-shaped structure, such as a square frame-shaped structure, and the bracket body 410 with the frame-shaped structure can not only meet the requirement of the arrangement of the engaging legs 420, but also conveniently reduce the weight of the fixing bracket 400, and prevent the device arrangement on the circuit board 300 from being hindered by the arrangement of the fixing bracket 400. In addition, the bracket body 410 is convenient for the fixing bracket 400 to contact with the upper shell 201, so as to apply a pressing force to the clamping leg 420.

In some embodiments of the present application, the stent body 410 includes a stent frame 412 and a hollow region 413, and the stent frame 412 surrounds the hollow region 413, so as to further reduce the weight of the stent body 410 and reduce the space occupied by the fixing stent 400 in the packaging cavity. The hollow region 413 may have a regular rectangular shape, but may have any other shape that can be provided.

Further, in some embodiments of the present application, the bracket body 410 further includes a pressing protrusion 411, and the pressing protrusion 411 is disposed on the bracket body 410. As shown in fig. 5, the pressing protrusion 411 may be provided along the width direction of the holder body 410, but is not limited to the width direction of the holder body 410.

In some embodiments of the present application, as shown in fig. 5, the engaging leg 420 includes an engaging leg body 421, one end of the engaging leg body 421 is connected to the bracket body 410, and the other end of the engaging leg body 421 is provided with an engaging groove 422. In an example, the other end of the engaging script body 421 is provided with two axially symmetric engaging slots 422, and the other end of the engaging pin body 421 is an "i" shaped structure, and the "i" shaped structure facilitates the engaging connection of the other end of the engaging pin body 421 with the circuit board 300, so as to apply a force to the circuit board 300. In the embodiment of the present application, two clamping grooves 422 are not limited to be axially symmetrically disposed at the other end of the clamping script body 421, only one clamping groove 422 may be disposed, and the clamping groove 422 may be a flat surface.

As shown in fig. 5, the 4 engaging legs 420 are uniformly distributed under the bracket body 410. Along support body 410 length direction, the two bisymmetry distributions of 4 block feet 420 are in the both sides of support body 410, and 4 block feet 420 set up the tip at support body 410.

In some embodiments of the present application, a protrusion 423 is further disposed on the snap-fit script body 421, and the protrusion 423 is used for fixing the lateral positioning of the bracket 400 in the optical module. As shown in fig. 5, the engaging script body 421 of the 4 engaging legs 420 may be provided with the protrusion 423, but the engaging script body 421 is not limited to be provided with the protrusion 423. Correspondingly, in some embodiments of the present application, 1, 2, etc. protrusions 423 may be disposed on the snap-in script body 421, specifically, the protrusions 423 may be selected as needed, and usually, 1 protrusion 423 is disposed on the snap-in script body 421.

Fig. 6 is an exploded view of a mounting bracket and a circuit board according to some embodiments. As shown in fig. 6, in the circuit board 300 provided in the embodiment of the present invention, in order to be used in combination with the fixing bracket 400, 4 positioning holes 310 are correspondingly disposed on the side of the circuit board 300. Illustratively, the 4 positioning holes 310 are all U-shaped holes, and the U-shaped holes disposed at the side of the circuit board 300 are convenient for assembling with the fixing bracket 400.

Fig. 7 is a first assembly view of a fixing bracket and a circuit board according to some embodiments, fig. 8 is a second assembly view of a fixing bracket and a circuit board according to some embodiments, and fig. 9 is a cross-sectional view of fig. 8. As shown in fig. 7-9, in some embodiments of the present application, each of the fastening pins 420 is correspondingly engaged with one of the positioning holes 310, wherein the side wall of the fastening groove 422 of the fastening script 421 is engaged with the surface of the connecting circuit board 300, so that the fastening script 421 is fastened in the positioning hole 310, and the fastening script 421 is further assembled in the positioning hole 310; when the circuit board 300 is fixed in the optical module, the sidewall of the card slot 422 may press the surface of the circuit board to fix the circuit board 300 from the height direction of the optical module.

In some embodiments of the present invention, the top of the fixing bracket 400 contacts the upper housing 201, the bottom contacts the lower housing 202, and the slot 422 is in interference fit with the circuit board 300, so as to directly fix the circuit board 300 by the fixing bracket 400. However, the precision requirements of the engaging leg body 421 and the engaging leg body 421 on the engaging groove 422 are higher, and in order to reduce the precision requirements of the fixed circuit board 300 on the engaging leg body 421 and the engaging leg body 421 on the engaging groove 422, in some embodiments of the present application, the supporting member is disposed on the lower housing 202, and the supporting member is matched with the fixing bracket 400 to fix the circuit board 300.

Fig. 10 is a structural view illustrating a lower case provided according to some embodiments, and fig. 11 is a sectional view illustrating a lower case provided according to some embodiments. As shown in fig. 10 and 11, in some embodiments of the present application, 4 supporting components 2021 are disposed in the inner cavity of the lower housing 202, and the 4 supporting components 2021 are disposed corresponding to the positioning holes 310 on the circuit board 300, and the positioning holes 310 are matched with the connecting supporting components 2021; of course, the embodiment of the present application is not limited to the arrangement of 4 supporting components 2021 and the arrangement position shown in fig. 10, and the arrangement position can be specifically selected according to the space of the inner cavity of the lower housing 202 and the shape of the circuit board 300.

In some embodiments of the present application, the supporting component 2021 includes a supporting platform 211 and a position-limiting column 212, the position-limiting column 212 is disposed on the top of the supporting platform 211, the position-limiting column 212 is cooperatively connected to the positioning hole 310, the position-limiting column 212 facilitates the assembly and positioning of the circuit board 300 in the optical module, and the supporting platform 211 is used for supporting the circuit board 300; meanwhile, the limiting columns 212 can also assist in fixing the circuit board 300 in the width and length directions of the optical module.

In some embodiments of the present application, the supporting platform 211 is disposed on the bottom plate of the lower housing 202, and a gap is formed between the supporting platform 211 and the sidewall of the lower housing 202, so as to conveniently accommodate the bottom of the engaging leg 420.

Fig. 12 is a schematic view illustrating an assembly of a lower case and a circuit board according to some embodiments, and fig. 13 is a sectional view illustrating an assembly of a lower case, a circuit board, and a fixing bracket according to some embodiments. As shown in fig. 12 and 13, in some embodiments of the present invention, one positioning hole 310 may be adapted to connect with the corresponding limiting post 212 and the engaging body 421, so as to facilitate the supporting component 2021 and the engaging leg 420 of the fixing bracket 400 to cooperate with the fixing circuit board 300. Illustratively, the position-limiting columns 212 are fitted inside the connection positioning holes 310, and the engaging bodies 421 are fitted outside the connection positioning holes 310. Of course, in the embodiment of the present application, the positioning hole specially used for matching with the limiting column 212 may be provided.

Fig. 14 is a schematic view of an assembly of an upper housing and a fixing bracket according to some embodiments. As shown in fig. 14, the holder body 410 of the fixing holder 400 contacts the upper case 201. In order to facilitate the contact between the upper housing 201 and the bracket body 410, a supporting post 2011 is disposed on the upper housing 201, and the upper housing 201 is in contact with the top of the bracket body 410 through the supporting post 2011.

In some embodiments of the present application, as shown in fig. 14, 4 supporting columns 2011 are disposed on the upper housing 201, and the 4 supporting columns 2011 are correspondingly disposed above the position of the bracket body 410 where the engaging pins 420 are connected, so that the pressing force of the supporting columns 2011 on the bracket body 410 can coaxially act on the engaging pins 420, thereby facilitating the engaging pins 420 to apply the pressing force to the circuit board 300. Further, in some embodiments of the present application, the top of the pressing protrusion 411 contacts the upper casing 201, so that the upper casing 201 can apply a pressing force to the fixing bracket 400, thereby ensuring the firmness of the fixing bracket 400 fixing the circuit board 300.

In the optical module assembling process provided by the embodiment of the application, the fixing bracket 400 and the circuit board 300 can be assembled at first, then the circuit board 300 assembled with the fixing bracket 400 is assembled to the lower housing 202, and finally the upper housing 201 and the lower housing 202 are connected in a covering manner. The upper housing 201 and the lower housing 202 are covered and connected, so that the upper housing 201 extrudes the fixing bracket 400, the fixing bracket 400 extrudes the circuit board 300, and when the fixing bracket 400 and the supporting component 2021 on the lower housing 202 act on the circuit board 300 together, the circuit board 300 can be fixed in a wrapped cavity formed by covering the upper housing 201 and the lower housing 202. Thus, the optical module provided in the embodiment of the present application facilitates the fixing of the circuit board 300 through the fixing bracket 400, and simultaneously, the optical module is intersected with the circuit board through the dispensing, thereby facilitating the disassembly and repair of the circuit board 300.

Fig. 15 is a cross-sectional view of a light module provided according to some embodiments, and fig. 15 shows a fixing and assembling structure of a circuit board 300 in an embodiment of the present application. As shown in fig. 15, the circuit board 300 is fixed in a package cavity formed by the upper shell 201 and the lower shell 202 in a covering manner by the upper shell 201, the fixing bracket 400 and the lower shell 202; the ends of the engaging legs 420 are located in the gaps formed between the supporting platform 211 and the sidewalls of the lower housing 202.

As shown in fig. 15, in some embodiments of the present application, when the circuit board 300 is fixed in the package cavity formed by the upper housing 201 and the lower housing 202 being covered, the bottom surface of the upper housing 201 presses the pressing protrusion 411 on the holder body 410 and the supporting column 2011 on the bottom surface of the upper housing 201 presses the side of the holder body 410; the engaging pins 420 are engaged with the positioning holes 310 of the circuit board 300 through the engaging slots 422, and the supporting platform 211 on the lower housing 202 supports the circuit board 300; the fixing bracket 400 pressed by the upper housing 201 presses the circuit board 300 through the sidewall of the slot 422 of the engaging leg 420, so that the sidewalls of the supporting platform 211 and the slot 422 press the circuit board 300 together to fix the circuit board 300.

As shown in fig. 15, the tops of the protrusions 423 contact the side walls of the lower housing 202 to support the engaging legs 420 in the width direction of the optical module, so that the engaging legs 420 are prevented from being compressed and deformed when the fixing bracket 400 is pressed by the upper housing 201 and the circuit board 300; meanwhile, the fixing of the circuit board 300 in the width direction of the optical module can be assisted, and the circuit board 300 is further ensured to be fixed in a wrapping cavity formed by covering the upper shell 201 and the lower shell 202.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (10)

1. A light module, comprising:

an upper housing;

the lower shell is covered and connected with the upper shell to form a wrapping cavity;

the circuit board is arranged in the wrapping cavity and is provided with a positioning hole;

the fixing support is arranged in the wrapping cavity and is provided with a clamping foot, and the clamping foot is connected with the positioning hole in a clamping manner;

the upper shell is in abutting connection with the top of the fixed support and used for fixing the circuit board in the wrapping cavity through the fixed support.

2. The optical module according to claim 1, wherein the fixing bracket further comprises a bracket body, one side of the bracket body is connected with the upper housing in an abutting manner, and the clamping pin is connected with the other side of the bracket body;

the support body comprises a support frame and a hollow area surrounded by the support frame, and the tops of the clamping feet are connected with the support frame.

3. The optical module according to claim 2, wherein a support member is provided inside the lower housing, the support member being connected to the circuit board;

the supporting component comprises a supporting platform and a limiting column, the supporting platform is arranged on the bottom plate of the lower shell, the limiting column is arranged at the top of the supporting platform, the supporting platform supports the circuit board, and the limiting column is embedded in the positioning hole.

4. The optical module according to claim 1, wherein the engaging leg includes an engaging leg body and a engaging groove disposed on the engaging leg body, and the engaging groove engages with the positioning hole.

5. The optical module according to claim 1, wherein a protrusion is provided on the engaging leg, and the protrusion contacts with a sidewall of the lower housing.

6. The optical module of claim 1, wherein a support post is disposed on the upper housing, and the support post is abutted against the top of the fixing bracket.

7. The optical module according to claim 2, wherein a pressing protrusion is provided on the holder body, and the pressing protrusion contacts a bottom of the upper housing.

8. The optical module according to claim 3, wherein a gap is provided between the support platform and a sidewall of the lower housing, and a distal end of the engaging leg is located in the gap.

9. The optical module according to claim 2, wherein four positioning holes are arranged on the circuit board, and the four positioning holes are arranged on two sides of the circuit board in a pairwise symmetry manner;

and the other side of the bracket body is correspondingly provided with four clamping feet which are respectively connected with the corresponding positioning holes in a clamping way.

10. The optical module according to claim 4, wherein two card slots are axially symmetrically disposed on two sides of the engaging body, and side walls of the card slots contact a surface of the circuit board.

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