WO2019179448A1

WO2019179448A1 - Optical module

Info

Publication number: WO2019179448A1
Application number: PCT/CN2019/078783
Authority: WO
Inventors: 陈金磊; 刘寅龙; 司宝峰
Original assignee: 青岛海信宽带多媒体技术有限公司
Priority date: 2018-03-19
Filing date: 2019-03-19
Publication date: 2019-09-26
Also published as: CN108471672A

Abstract

An optical module, comprising a fastener (3) separately connected to two circuit boards (2). The fastener (3) comprises a main plate (31), side plates (32), and two hooks (33); the side plates (32) are provided on the main plate (31) in a protruding manner, and end faces (B) of the side plates (32) are attached to the two circuit boards (2) to support the two circuit boards (2) connected to the fastener (3); the hooks (33) are provided at two ends of the main plate (31), and the hooks (33) are fastened to slots (21) provided on the circuit boards (2), so that the two circuit boards (2) are abutted against the main plate (31). The two circuit boards (2) are fixed on two end faces (B) of the side plates (32), so that the two circuit boards (2) are fixed in parallel, thereby ensuring parallelism of a fixed connection of the two circuit boards (2) and improving product yield. Moreover, contact areas are large when the circuit boards (2) are fixed on the end faces (B) and connection stability is high; the two circuit boards (2) can be fixed quickly by adopting a snap-fitting manner to connect the hooks (33) and the slots (21) of the two circuit boards (2), the operation is simple and the two circuit boards are protected from being damaged during the connection process; moreover, a detachable connection can be achieved and the utilization rate of the product is improved.

Description

Optical module

The present disclosure claims priority to Chinese Patent Application No. 201101232602.8, filed on Jan.

Technical field

The present disclosure relates to the field of optical device technologies, and in particular, to an optical module.

Background technique

In the field of electronic components, the circuit board as the medium for connecting electronic components is the basis of the optical module. As the transmission power and function of the optical module increase, especially in the case of a large amount of dense electronic components, the single-layer circuit board has Can not meet the product communication needs, need more board layout space to arrange components, in order to increase the layout space, a multi-layer circuit board structure that can better utilize space came into being.

Summary of the invention

The present disclosure provides an optical module capable of fast and stable assembly, a simple assembly process, high product yield, and high product yield of the optical module.

The present disclosure provides an optical module, including:

a first shell and a second shell, the first shell and the second shell enclosing a cavity, and the cavity is provided with:

a first circuit board and a second circuit board, the first circuit board and the second circuit board are oppositely disposed along a direction of the second shell toward the first shell, and are provided with a card slot; The first circuit board is connected to the first circuit board, and includes a main board, a side board, and a first hook and a second hook. The side board is convexly disposed above the main board and the two end faces of the side board are respectively Cooperating with the first circuit board and the second circuit board to support the first circuit board and the second circuit board connected to the card holder, the first hook and the second hook setting The first hook is engaged with the card slot on the first circuit board at the two ends of the main board, and the second hook is engaged with the card slot of the second circuit board. So that the first circuit board and the second circuit board abut against the main board.

In some embodiments, the two end faces of the side plate facing the first circuit board and the second circuit board respectively are in contact with the opposite surfaces of the first circuit board and the second circuit board, The side plates located between the first circuit board and the second circuit board support the first circuit board and the second circuit board.

In some embodiments, the length of the side panel is not greater than the length of the main board in a direction along the second shell toward the first shell.

In some embodiments, the first circuit board defines a first notch and the first notch is disposed corresponding to the card slot on the first circuit board, and the first notch is located on the first circuit board. The outer edge is recessed along the width direction of the first circuit board, the end of the main board is located in the first notch; the second circuit board is provided with a second notch and the second notch is a card slot on the second circuit board is correspondingly disposed, the second notch is located at an outer edge of the second circuit board and is recessed along a width direction of the second circuit board, and an end of the main board is located at the Said in the second gap.

In some embodiments, the first hooks are respectively disposed on one end of the main board near the first circuit board, and the first hooks are protruded in a direction toward the first circuit board. The second hooks are respectively disposed on one end of the main board near the second circuit board, and the second hooks are protruded in a direction toward the second circuit board.

In some embodiments, the number of the side plates is two, including a first side plate and a second side plate, and the first side plate and the second side plate are convexly disposed along a surface direction of the main board. Both sides of the motherboard.

In some embodiments, the number of the side plates is two, including a first side plate and a second side plate, and the first side plate and the second side plate are bent in a direction toward the inside of the first circuit board. Folded on both sides of the motherboard.

In some embodiments, the card holder is a sheet metal member.

DRAWINGS

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings used in the description of the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present disclosure. Other drawings may also be obtained from those of ordinary skill in the art in light of the inventive work.

1 is a schematic structural view showing a structure of a two-layer circuit board in the related art;

FIG. 2 is a schematic structural diagram of an optical module according to an embodiment of the present disclosure;

3 is a schematic structural view of an optical module at the A position in FIG. 2;

FIG. 4 is a schematic structural diagram of a position corresponding to a circuit board and a card holder in an optical module according to an embodiment of the present disclosure;

FIG. 5 is a schematic structural diagram of a card holder in an optical module according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of a card holder in an optical module according to an embodiment of the present disclosure.

detailed description

The technical solutions in the embodiments of the present disclosure are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present disclosure. It is obvious that the described embodiments are only a part of the embodiments of the present disclosure, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present disclosure without departing from the inventive scope are the scope of the disclosure.

It should be noted that at present, the existing two-layer circuit board structure adopts two copper pillars to support the fixing manner of two circuit boards. As shown in FIG. 1 , the main circuit board 01 and the sub-circuit board 02 are arranged in parallel above and below, and the copper pillars are arranged. 03 is respectively soldered on the side of the main circuit board 01 and the sub-board 02, and is supported by the copper post 03 and connected to the main circuit board 01 and the sub-board 02. After the main circuit board 01 and the sub-board 02 are fixed, the pair is doubled. The layer circuit board structure is loaded into the casing to form an optical module. Since the existing double-layer circuit board structure is fixed by the copper pillar 03 welding method, on the one hand, the high price of the copper pillar 03 makes the manufacturing cost of the double-layer circuit board structure increase. The welding process is complicated, and it is easy to affect the main circuit board 01 and the sub circuit board 02. On the other hand, the fixed support effect is poor, and the support strength of the copper post 03 to the sub circuit board 02 cannot meet the demand, and it is not easy to realize when welding. The parallel arrangement of the main circuit board 01 and the sub-board 02 has a low product yield. In order to achieve parallel arrangement of the two to avoid skew after soldering, additional parallelism detection is required to make the manufacturing cost of the double-layer circuit board structure. Was added, and further, the main circuit board 01 and the sub-circuit board by soldering the copper pillar 02 is connected to non-removable, and increase the difficulty of assembly work. Therefore, it is necessary to design an optical module capable of achieving a fast and stable assembly.

As shown in FIG. 2, FIG. 3, FIG. 4, FIG. 5 and FIG. 6, the optical module comprises a first shell 1 and a second shell 4 which are connected by a fastening, and are formed by the first shell 1 and the second shell 4. Two circuit boards 2 are disposed in the cavity, and the two circuit boards 2 are disposed opposite to each other in the direction in which the second casing 4 is directed to the first casing 1 (see A direction in FIG. 2), and also include two circuits respectively. The card holder 3 is connected to the card holder 3, and the card holder 3 includes a main board 31, a side plate 32 and two hooks 33. The side plate 32 is convexly disposed on the main board 31 and the end surface B of the side plate 32 is opposite to the two circuit boards 2. The two circuit boards 2 are connected to the card holder 3, and the hooks 33 are disposed at two ends of the main board 31. The two circuit boards 2 are provided with card slots 21, and the hooks 33 are opposite to the card slots 21. The card is connected so that both circuit boards 2 abut on the main board 31.

In the above optical module, by arranging the two circuit boards 2 arranged one above the other on the end faces B of the side plates 32, the opposite surfaces of the circuit board 2 are respectively attached to the end faces B of the side plates 32 so as to be located. The side plate 32 between the two circuit boards 2 supports the circuit board 2, and the hooks 33 are coupled to the card slots 21 so that the circuit board 2 abuts against the main board 21, ensuring the bonding of the circuit board 2 and the end surface B, preventing The circuit board 2 is rotated to be separated from the end face B. Since the side plates 32 are formed with two upper and lower end faces parallel to each other, the end faces of the side plates 32 and the hooks 33 together realize the assembly of the card holder 3 and the circuit board 2, and the circuit board 2 is protruded from the end face B provided on the main board 31. The two boards 2 are fixed to the two end faces B to support and fix the two circuit boards 2, which ensures the parallelism of the fixed connection of the two circuit boards 2 arranged up and down, and improves the product yield. At the same time, when the circuit board 2 is fixed to the end face B, the contact surface is large, and the strength of the fixed support is high, which can meet the support strength requirements of the two circuit boards 2, that is, the connection stability of the above optical module is better; The manner in which the hooks 33 on the card holders 3 are snap-connected to the card slots 21 on the two circuit boards 2 can quickly realize the fixed connection between the card holders 3 and the two circuit boards 2, that is, the two circuits can be quickly fixed. Compared with the prior art method of soldering connection, the above-mentioned snap connection mode is relatively simple to operate, the connection process does not cause damage to the two circuit boards 2, and the detachable connection can be realized, and the connection strength is high, and the connection is improved. Product utilization

Therefore, the above optical module can achieve fast and stable assembly, the assembly process is simple, and the product yield is high.

In order to better ensure the stability of the connection, specifically, as shown in FIG. 5, the main board 31 is provided with two side plates 32, and the two side plates 32 are respectively disposed on two sides of the main board 31, and the two side boards 32 are used. The four end faces B of the two circuit boards 2 are supported, and the two end faces B are arranged up and down, thereby ensuring the stability of the two circuit boards 2 connected by the card holder 3. Optionally, the two side plates 32 are respectively disposed on the two sides of the main board 31 along the surface direction of the main board 31, that is, the side boards 32 are protruded from the surface where the main board 31 is located, and the side boards 32 are provided. Coplanar with the motherboard 31. Optionally, the two side plates 32 are bent and disposed on two sides of the main board 31 in a direction toward the inside of the circuit board 2, that is, the side boards 32 are disposed obliquely to the surface of the main board 31, and the side boards 32 are facing the circuit board. The inner direction of 2 is to support the surface of the circuit board 2. Preferably, the side plates 32 are disposed in a direction perpendicular to the surface of the main board 31, so that the four end faces B formed by the two side plates 32 can ensure a good abutting effect on the circuit board 2, thereby ensuring the card holder 3 and After the circuit board 2 is fixedly connected, the fixing effect is good, and the support strength of the card holder 3 is ensured.

In order to provide a large contact area of the circuit board 2 and the end surface B, the positioning of the circuit board 2 is ensured to be stable. As shown in FIG. 4 and FIG. 5, specifically, each circuit board 2 is provided with a main board 31 for receiving the main board 31. The notch 22 is formed in the outer edge of the circuit board 2 and is recessed in the width direction of the circuit board 2. The end of the main board 31 is disposed in the notch 22, and the end of the main board 31 is abutted by the notch 22 to limit the circuit board 2. The degree of freedom along the width and length directions ensures the positioning of the circuit board 2. The notch 22 is disposed corresponding to the card slot 21 so that the end of the main plate 31 is received in the notch 22, and the hook 33 disposed on the main board 31 is easily engaged with the card slot 21.

In the above optical module, the end face B formed by the side plate 32 can be used for a large contact surface area in contact with the circuit board 2 with respect to the soldering surface of the copper post, and the card holder 3 is ensured to the circuit board 2. The support strength can meet the support strength requirements of the two circuit boards 2, that is, the connection stability of the above optical module is good.

For the above optical module, two hooks 33 are respectively disposed on the main board 31 near the two ends of the circuit board 2, and the hooks 33 are protruded from the main board 31 in the direction toward the circuit board 2, and the hooks 33 are facing the circuit board 2. The surface cooperates with the contact surface of the circuit board 2, thereby limiting the degree of freedom of the two circuit boards 2 in the A direction, ensuring that the two circuit boards 2 are relatively fixed in the up and down direction; the hooks 33 and the main board 31 connected to the hooks 33 are The cooperation limits the degree of freedom of the circuit board 2 along the width direction thereof, and ensures that the two circuit boards 2 are relatively fixed in the left-right direction; each of the hooks 33 is snap-connected with the card slots 21 of the two circuit boards 2, and the hooks are hooked. 33 and the card slot 21 are matched and limit the degree of freedom of the circuit board 2 along its length, which ensures that the two circuit boards 2 are relatively fixed in the front-rear direction; therefore, the card holder 3 can fix two circuit boards 2 to realize A relatively fixed connection of two circuit boards 2 in the optical module.

On the basis of the above optical module, in order to facilitate the snap connection between the card holder 3 and the two circuit boards 2, specifically, the direction in which the second housing 4 is directed toward the first housing 1 (refer to the A direction in FIG. 2) As shown, the length of the side plate 32 is not greater than the length of the main board 31, so that the assembly of the card holder 3 and the circuit board 2 can be facilitated, and the stable support of the card holder 3 and the circuit board 2 can be ensured. The length of the side plate 32 is equal to the length of the main plate 31 along the direction in which the second casing 4 is directed to the first casing 1. The side plates 32 and the end faces of the main plate 31 are located on the same plane to form a contact surface of the circuit board 2, At this time, the area of the contact surface of the circuit board 2 is relatively large, so that the contact surface area of the circuit board 2 and the card holder 3 is large, and the strength of the fixed support can be ensured to be high, and the support strength requirement for the two circuit boards 2 can be satisfied. That is, the connection stability of the above optical module is good.

On the basis of the above-mentioned optical module facilitating the snap connection between the card holder 3 and the two circuit boards 2, in order to ensure better connection stability of the optical module, specifically, the two hooks 33 are respectively disposed on the main board 31. The two ends of the circuit board 2 are protruded from the main board 31 in the direction of the circuit board 2, and the buckles of the card holders 3 and the circuit board 2 are buckled by the hooks of the hooks 33 and the card slots 21, The two hooks 33 respectively disposed at the two ends of the circuit board 2 are respectively engaged with the two circuit boards 2.

In order to better realize the snap connection between the card holder 3 and the two circuit boards 2, as shown in FIG. 4 and FIG. 5, in a preferred embodiment, the number of the card holders 3 in the optical module is two, each A circuit board 2 is symmetrically disposed on both sides in the width direction to be provided with a notch 22 for accommodating the main board 31. The two card holders 3 jointly support the two circuit boards 2 from both sides of the circuit board 2.

In the above optical module, two circuit boards 2 are arranged in parallel on the end faces B of the two card holders 3 in parallel, the main board 31 is housed in the notch 22, and then each card hook 33 and the card of the two circuit boards 2 are mounted. The slots 21 are snap-connected so that each circuit board 2 is fixed to the end surface B of the card holder 3, thereby fixing the two circuit boards 2 to the end surface B. At this time, the card 33 and the card slot 21 are used to implement the card. The seat 3 can realize the fixed connection of the card holder 3 and the two circuit boards 2 relatively quickly, that is, the two circuit boards 2 can be quickly fixed; compared with the manner of welding connection in the prior art, the above-mentioned hooks 33 and the card slots 21 The mode operation is relatively simple, the connection process does not cause damage to the two circuit boards 2, and the detachable connection can be realized, and the utilization rate of the product is improved.

For the shorter circuit board 2, one card holder 3 can be used, and for the longer circuit board 2, a plurality of card holders 3 can be used, two card holders 3 are used, and two card holders 3 are symmetrically disposed on the circuit board. The two of the two can ensure the balance of the board, ensure the balance of the optical module and the stability of the assembly, and improve the product yield.

In order to ensure the support strength of the card holder 3, the card holder 3 can be prepared from a metal material or other materials that satisfy the support strength of the card holder 3 to the circuit board 2. The preparation material of the card holder 3 can be made according to the actual situation of the optical module. select. Specifically, the card holder 3 may be a sheet metal member.

In the above optical module, the card holder 3 may be a sheet metal member or other integrally formed structure. The specific structure of the card holder 3 is selected according to the actual situation of the optical module.

When the card holder 3 is a sheet metal member, the card holder 3 of a specific shape is prepared by performing a cold working process such as punching and bending on the sheet metal material, since the sheet metal member has light weight, high strength, low cost, and large-scale amount. Features such as good production performance, widely used in the field of electronic devices.

It will be apparent to those skilled in the art that various modifications and changes can be made in the embodiments of the present disclosure without departing from the spirit and scope of the disclosure. Thus, it is intended that the present invention cover the modifications and the modifications

Claims

An optical module comprising:

a first shell and a second shell, the first shell and the second shell enclosing a cavity, and the cavity is provided with:

a first circuit board and a second circuit board, the first circuit board and the second circuit board are oppositely disposed along a direction of the second shell toward the first shell, and are provided with a card slot;

a card holder, connected to the first circuit board and the first circuit board, including a main board, a side board, and a first hook and a second hook, the side board protrudingly disposed above the main board and the side board The two end faces respectively fit the first circuit board and the second circuit board to support the first circuit board and the second circuit board connected to the card holder, the first hook and a second hook is disposed at two ends of the main board, the first hook is engaged with the card slot of the first circuit board, and the second hook is opposite to the second circuit board The card slot is snapped so that the first circuit board and the second circuit board abut against the main board.
The optical module according to claim 1, wherein two side faces of the side plate facing the first circuit board and the second circuit board respectively face an opposite surface of the first circuit board and the second circuit board. The bonding is such that the side plates located between the first circuit board and the second circuit board support the first circuit board and the second circuit board.
The optical module according to claim 1, wherein a length of the side plate is not greater than a length of the main board in a direction along the second case toward the first case.
The optical module of claim 1 , wherein a first notch is defined on the first circuit board and the first notch is disposed corresponding to a card slot on the first circuit board, and the first notch is located in the An outer edge of the first circuit board is recessed along a width direction of the first circuit board, an end of the main board is located in the first notch; a second gap is formed on the second circuit board, and the The second notch is disposed corresponding to the card slot on the second circuit board, the second notch is located at an outer edge of the second circuit board and is recessed along a width direction of the second circuit board, where the main board is The end is located within the second gap.
The optical module according to claim 1, wherein the first hooks are respectively disposed on one end of the main board near the first circuit board, and the first hooks are convex in a direction toward the first circuit board. The second hooks are respectively disposed on one end of the main board near the second circuit board, and the second hooks are convexly disposed in a direction toward the second circuit board.
The optical module according to claim 1, wherein the number of the side plates is two, including a first side plate and a second side plate, and the first side plate and the second side plate are along a surface direction of the main board. The protrusions are disposed on both sides of the main board.
The optical module according to claim 1, wherein the number of the side plates is two, including a first side plate and a second side plate, the first side plate and the second side plate facing the first circuit board The inner direction is bent at both sides of the main board.
The optical module of claim 1 wherein the card holder is a sheet metal member.