High-speed cable penetrating type welding left-right type fixing structure and optical module

Abstract

The utility model relates to a high-speed cable penetrating type welding left-right type fixing structure, which is characterized in that grounding bases are fixed on a PCB (Printed Circuit Board), a plurality of limiting holes distributed in rows are formed in the side surfaces of the bases in a penetrating manner, an upper cover for sealing and covering the limiting holes in each base is arranged on one side of each base, and the upper covers are respectively fixed with the bases and the PCB; the lower surface of the upper cover is provided with an independent compartment corresponding to each limiting hole in the base, and the PCB is provided with two signal bonding pads in the area defined by each compartment. Signal lines in the multiple high-speed cables of each high-speed cable set enter the corresponding compartments of the upper cover through the limiting holes in one base and are welded to the signal bonding pads, the sections, provided with the protective sleeves, of the high-speed cables are limited through the limiting holes, and ground wires in the high-speed cables are welded to the bases. The fixing structure has the beneficial effects that the fixing structure does not need dispensing, so that the problem of impedance increase caused by excessive dispensing does not need to be considered, and the performance of the high-speed optical module is not influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to optical module technical field, concretely relates to a high speed cable through type welding left and right formula fixing structure and optical module. BACKGROUND

[0002] The signal line and ground wire of the high speed cable in the traditional optical module (that is, the high speed cable is called double-core coaxial line with ground wire, which has two signal lines and two ground wires, and the two ground wires are distributed on the outer side of the two signal lines) are all directly welded on the PCB board, and the defects of this mode are as follows: after welding, UV glue is coated, and ultraviolet light is cured to prevent the signal line from falling off and affecting the performance, if the amount of coated glue is too much during the coating process, the impedance will be affected, thereby affecting the performance of the optical module, and this problem has little effect on 10G, 25G, 40G, 100G and 200G low-speed optical modules, but has a very large effect on 800G and 1600G high-speed optical modules. SUMMARY

[0003] The technical problem to be solved by the utility model is to provide a high speed cable through type welding left and right formula fixing structure and optical module to overcome the defects in the prior art.

[0004] The technical scheme for solving the above technical problem of the utility model is as follows:

[0005] A high speed cable through type welding left and right formula fixing structure, comprising: a PCB board, at least one ground base is fixed on the PCB board along the length direction of the PCB board, a plurality of limiting holes distributed in rows are arranged between the two side surfaces of the length direction of the base, one upper cover covering all the limiting holes is arranged on one side of each base close to the gold finger of the PCB board, and the upper cover is fixed with the base and the PCB board; an independent compartment is arranged on the lower surface of the upper cover at each limiting hole on the base, two signal pads are arranged in the area surrounded by each compartment on the PCB board, the signal lines in the plurality of high speed cables of each high speed cable group enter the corresponding compartment in the upper cover through the limiting holes on each base and are welded with the signal pads, the limiting holes limit the section of the high speed cable with the protective sleeve, and the ground wire in the high speed cable is welded with the base.

[0006] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0007] Further, the section of the high speed cable in the limiting hole has a metal tin paper, a through hole communicating with the limiting hole is arranged on the upper surface of the base in the area above the metal tin paper of each high speed cable, and a solder block welding the metal tin paper in the high speed cable with the base is arranged in the through hole.

[0008] Further, the PCB has multiple grounding pads at different positions, and each of the base and the upper cover is welded to one of the grounding pads on the PCB.

[0009] Further, the upper cover is made of copper tinned, and the base is made of copper tinned, and the upper cover and the base are fixed by welding.

[0010] Further, the upper cover has a slope on the side close to the gold finger of the PCB.

[0011] Further, the base has a gap on the side away from the gold finger of the PCB, the gap connects all the limiting holes and penetrates through two adjacent sides of the base, the height of the gap is greater than the outer diameter of the ground wire, and the recesses as the ground wire welding positions are arranged on the middle region of the upper surface of the base between the adjacent two limiting holes and outside the two limiting holes at the most edge, the recesses are communicated with the gap, and the ground wire in the high-speed cable is welded in the recess.

[0012] Further, the upper cover covers the recess between the adjacent two limiting holes.

[0013] Further, the lower surface of the upper cover has a protrusion corresponding to each recess.

[0014] Based on the above technical scheme, the utility model also provides a kind of optical module, including the high-speed cable through type welding left-right fixed structure described above.

[0015] The utility model has the advantages that:

[0016] 1) the fixed structure does not need to glue, so it does not need to consider the problem of impedance increase caused by excessive glue, to ensure that it does not affect the performance of high-speed optical module;

[0017] 2) the limiting hole on the base in the scheme limits the section of the protective sleeve of the high-speed cable, so as to reduce the risk of loosening of the high-speed cable;

[0018] 3) the base and the upper cover with specific structure can effectively avoid the interference between signal lines in the high-speed cable;

[0019] 4) the metal tin paper in the high-speed cable is welded with the base by the soldering block, which further effectively reduces the risk of loosening of the high-speed cable and reduces the interference between signals in adjacent high-speed cables;

[0020] 5) the upper cover has a slope on the side close to the gold finger of the PCB, which facilitates the high-speed cable group in the front another base to pass above, and reduces the bending angle of the high-speed cable group;

[0021] 6) The groove on the base and the protrusion on the top cover can serve as welding points and also as positioning points for the top cover and the base. Attached Figure Description

[0022] Figure 1 This is a structural diagram of the through-type welding left and right type fixing structure for medium and high speed cables of this utility model;

[0023] Figure 2 A partial structural diagram of the high-speed cable through-welding left-right fixing structure of this utility model with one top cover removed;

[0024] Figure 3 A partial structural diagram showing the removal of a top cover and a base from the through-type welding left-right fixing structure for high-speed cables of this utility model.

[0025] Figure 4 This is an assembly drawing of the base and the top cover in this utility model;

[0026] Figure 5 This is an exploded view of the base and the top cover of this utility model;

[0027] Figure 6 This is a structural diagram of the base in this utility model.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. PCB board, 110, signal pad, 120, ground pad; 2. Base, 210, limit hole, 220, through hole, 230, gap, 240, groove; 3. Top cover, 310, compartment, 320, ramp, 330, bump; 4. High-speed cable, 410, signal line, 420, ground line, 430, metal foil; 5. Solder block. Detailed Implementation

[0030] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0031] Example 1

[0032] like Figures 1-6 As shown, a high-speed cable through-welding left-right fixing structure includes:

[0033] PCB board 1, at least one grounded base 2 is fixed on PCB board 1, that is, the base 2 is made of metal. The bases 2 on PCB board 1 are arranged in rows along the length direction of PCB board 1. Since the multiple high-speed cables 4 of the high-speed cable group are arranged in rows along the width direction of PCB board 1, the length direction of the base 2 is distributed along the width direction of PCB board 1.

[0034] Multiple limiting holes 210 are formed between the two sides of the base 2 along its length, and each base 2

[0035] All the limiting holes 210 on the base are arranged in a row along its length; a cover 3 is arranged on the side of each base 2 near the gold finger of the PCB board 1 to cover all the limiting holes 210 on it (the base 2). The cover 3 and the base 2 cooperate to form a shield. The cover 3 is fixed to the base 2. Similarly, the cover 3 is also fixed to the PCB board 1.

[0036] Each of the limiting holes 210 on the lower surface of the upper cover 3 is provided with an independent compartment 310 at each limiting hole 210 on the corresponding base 2. The compartment 310 can be understood as multiple partitions on the lower surface of the upper cover 3, with a compartment 310 formed between two adjacent partitions. The number of upper limiting holes 210 on the base 2 is the same as the number of compartments 310 on the upper cover 3. For example, if the number of upper limiting holes 210 on the base 2 is four or six, then the number of compartments 310 on the upper cover 3 is also four or six. Of course, this is just an example, and other numbers can be selected in actual applications.

[0037] The PCB board 1 has two signal pads 110 within the area enclosed by each compartment 310;

[0038] Each high-speed cable group has multiple high-speed cables 4, and their signal lines 410 enter the corresponding compartments 310 of the upper cover 3 through the limiting holes 210 on one of the bases 2. After being bent and stripped of their protective layer (insulating medium), they are soldered to the signal pads 110. For example, if each high-speed cable group has four or six high-speed cables 4, then the base 2 adapted to that high-speed cable group has four or six limiting holes 210, and the upper cover 3 has four or six compartments 310. The signal lines of the four or six high-speed cables 4... 410 then enters one of the four or six limiting holes 210 on the base 2, and then continues to enter one of the four or six compartments 310 on the top cover 3. The signal line 410 is first bent and then the protective layer (insulating medium) is stripped before being soldered to the signal pad 110. The limiting holes 210 limit the section of the high-speed cable 4 with the protective sleeve. The ground wire 420 in the high-speed cable 4 is soldered to the base 2. Since the base 2 is grounded, the ground wire 420 in the high-speed cable 4 is also grounded when the ground wire 420 is soldered to the base 2.

[0039] Example 2

[0040] like Figures 1-6 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0041] The section of the high-speed cable 4 in the limiting hole 210 has a metal tin paper 430, and the upper surface of the base 2 is provided with a through hole 220 corresponding to the area above the metal tin paper 430 in each high-speed cable 4, that is, the number of the through holes 220 is the same as that of the limiting holes 210, and the through hole 220 is filled with a solder block 5 for welding the base 2 and the metal tin paper 430 in the high-speed cable 4, so that the metal tin paper 430 in the high-speed cable 4 is welded with the base 2 as a whole through the solder block 5, effectively reducing the risk of loosening of the high-speed cable 4 and reducing the interference of the signals in adjacent high-speed cables.

[0042] Embodiment 3

[0043] As shown in Figure 1 , Figure 2 , Figure 3 This embodiment is a further improvement on the basis of embodiment 1 or 2, and the specific improvements are as follows:

[0044] The PCB board 1 has multiple grounding pads 120 at different positions, and each base 2 and upper cover 3 is welded with one of the grounding pads 120 on the PCB board 1, so as to facilitate the grounding of the base 2 and the upper cover 3.

[0045] Embodiment 4

[0046] As shown in Figure 1 , Figure 2 , Figure 4 , Figure 5 , Figure 6 This embodiment is a further improvement on the basis of embodiment 1 or 2 or 3, and the specific improvements are as follows:

[0047] The upper cover 3 is preferably made of copper tinned, and the base 2 is preferably made of copper tinned. Of course, other materials can also be used in actual application. Since the base 2 is made of metal and the upper cover 3 is also made of metal, the upper cover 3 and the base 2 are preferably fixed by welding.

[0048] Embodiment 5

[0049] As shown in Figure 1 This embodiment is a further improvement on the basis of any one of embodiments 1 to 4, and the specific improvements are as follows:

[0050] The side of the upper cover 3 close to the gold fingers of the PCB board 1 has a slope 320, which facilitates the high-speed cable group in the front another base 2 to pass above when the same face of a PCB board 1 has multiple bases 2 close to each other along the length direction, thereby reducing the bending angle of the high-speed cable group.

[0051] Embodiment 6

[0052] As shown inFigure 4 , Figure 5 , Figure 6 As shown, this embodiment is a further improvement on embodiment 5, as detailed below:

[0053] The base 2 has a gap 230 on the side away from the gold fingers of the PCB board 1, which connects all the limiting holes 210 and passes through the two adjacent sides of the base 2 (the side away from the gold fingers of the PCB board 1). The height of the gap 230 is greater than the outer diameter of the ground wire 420. The middle area of ​​the upper surface of the base 2 has grooves 240 as ground wire soldering positions between the two adjacent limiting holes 210 and outside the two limiting holes 210 at the outermost edge. The grooves 240 are connected to the gap 230. When the high-speed cable 4 is inserted into the compartment 310 through the limiting hole 210, the ground wire 420 in the high-speed cable 4 enters the corresponding groove 240 through the gap 230 and is soldered in the groove 240.

[0054] Example 7

[0055] like Figure 2 , Figure 6 As shown, this embodiment is a further improvement on embodiment 6, as detailed below:

[0056] The upper cover 3 covers the groove 240 located between two adjacent limiting holes 210. On the lower surface of the upper cover 3, there is a protrusion 330 extending into the groove 240 at each corresponding groove 240. The protrusion 330 can serve as a welding point between the upper cover 3 and the base 2, and the protrusion 330 can cooperate with the groove 240 to position the upper cover 3 and the base 2.

[0057] Example 8

[0058] An optical module includes a high-speed cable through-welded left and right fixed structure as described in any of embodiments 1 to 7.

[0059] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A high-speed cable feedthrough soldered left-right fixing structure, characterized by, It includes: PCB board (1), the PCB board (1) is fixed at least one ground base (2) along its length direction, the base (2) is opened through a plurality of row distribution limit hole (210) between the length direction of two sides, each base (2) is arranged one cover (3) covering all limit hole (210) near the side of the gold finger of PCB board (1), the cover (3) is fixed with base (2) and PCB board (1) respectively;The lower surface of the cover (3) is respectively provided with an independent compartment (310) at each limit hole (210) on the base (2), the PCB board (1) has two signal pads (110) in the area surrounded by each compartment (310), the signal line (410) in the plurality of high-speed cables (4) of each high-speed cable group respectively enters the corresponding compartment (310) in the cover (3) through each limit hole (210) on the base (2) and is welded with the signal pad (110), the limit hole (210) limits the section of the protective sleeve of the high-speed cable (4), and the ground wire (420) in the high-speed cable (4) is welded with the base (2).

2. The high speed cable feedthrough soldered and clamped structure according to claim 1, characterized in that, The section of the high-speed cable (4) in the limit hole (210) has a metal tin paper (430), and the base (2) is provided with a through hole (220) on the upper surface of the base (2) and in the area above the metal tin paper (430) of each high-speed cable (4), the through hole (220) is filled with a solder block (5) for welding the base (2) and the metal tin paper (430) in the high-speed cable (4).

3. The high speed cable feedthrough soldered and clamped structure according to claim 1, wherein, The PCB board (1) has a plurality of ground pads (120) at different positions, and each base (2) and cover (3) is welded with one of the ground pads (120) on the PCB board (1).

4. The high speed cable feedthrough soldered and clamped structure according to claim 1, wherein, The cover (3) is made of copper tinning, the base (2) is made of copper tinning, and the cover (3) and the base (2) are fixed by welding.

5. The high-speed cable feedthrough soldered and fixed structure of any one of claims 1 to 4, characterized in that, The cover (3) has a slope (320) near the side of the gold finger of the PCB board (1).

6. The high-speed cable feedthrough soldered and fixed structure of any one of claims 1-4, characterized in that, The base (2) is provided with a gap (230) on the side away from the gold finger of the PCB board (1), the gap (230) communicates all limit holes (210) and penetrates through two adjacent sides, the height of the gap (230) is greater than the outer diameter of the ground wire (420), and the upper surface of the base (2) is provided with a groove (240) as a ground wire welding position between two adjacent limit holes (210) and outside two limit holes (210) at the most edge, the groove (240) communicates with the gap (230), and the ground wire (420) in the high-speed cable (4) is welded in the groove (240).

7. The high speed cable feedthrough soldered and clamped structure according to claim 6, characterized in that, The cover (3) covers the groove (240) between the two adjacent limit holes (210).

8. The high speed cable feedthrough soldered and potted structure of claim 6, wherein, The lower surface of the cover (3) has a protrusion (330) extending into the groove (240) at each groove (240).

9. An optical module characterized by comprising: It includes the high-speed cable through type welding left and right type fixing structure as claimed in any one of claims 1-8.

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