High-speed cable independent type bending-free welding fixing structure and optical module

Abstract

The utility model relates to an independent bending-free welding and fixing structure for a high-speed cable, which is characterized in that at least one grounded base is fixed on a PCB (Printed Circuit Board), each base is provided with a compartment, two signal bonding pads are arranged in an area enclosed by the compartment of each base on the PCB, a metal block is welded on each signal bonding pad, and the metal block is connected with the PCB. A limiting hole communicated with the compartment is formed in the side face of each base, two signal lines of each high-speed cable enter the compartment through the limiting holes in the base and are horizontally welded to the two metal blocks respectively after the protective layers are peeled off, and a ground wire of each high-speed cable is welded to the base. And an upper cover for sealing and covering the opening of the compartment is arranged on the base. An optical module comprises a high-speed cable independent type bending-free welding fixing structure. 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] This utility model relates to the field of optical module technology, specifically to a high-speed cable independent non-bending welding and fixing structure and an optical module. Background Technology

[0002] In traditional optical modules, the signal lines and ground lines of high-speed cables (i.e., these high-speed cables are called dual-core coaxial cables with ground lines, which have two signal lines and two ground lines, with the two ground lines distributed outside the two signal lines) are all directly soldered onto the PCB board. The disadvantage of this method is that after soldering, UV glue must be applied and cured with a UV lamp to prevent the signal lines from falling off and affecting performance. If too much glue is applied during the glue application process, it will affect the impedance, thereby affecting the performance of the optical module. This problem has a smaller impact on low-speed optical modules such as 10G, 25G, 40G, 100G, and 200G, but a very large impact on high-speed optical modules such as 800G and 1600G. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a high-speed cable independent non-bending welding fixing structure and optical module to overcome the shortcomings of the prior art.

[0004] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0005] A high-speed cable independent, bend-free, welded fixing structure includes:

[0006] The PCB board and high-speed cables are provided. At least one grounded base is fixed on the PCB board. Each base has a compartment. There are two signal pads in the area enclosed by the compartment of each base on the PCB board. A metal block is soldered on each signal pad. A limiting hole communicating with the compartment is opened on the side of each base. The two signal lines of each high-speed cable enter the compartment through the limiting hole on the base and are horizontally soldered to the two metal blocks after the protective layer is peeled off. The ground line of each high-speed cable is soldered to the base. The base is provided with a cover to seal the compartment opening.

[0007] The beneficial effects of this utility model are:

[0008] 1) This fixing structure does not require glue application, so there is no need to consider the impedance increase caused by excessive glue application, thus ensuring that it does not affect the performance of the high-speed optical module.

[0009] 2) By introducing a metal block, the signal lines entering the compartment can be directly and horizontally soldered to the metal block without bending, so as to avoid the stress caused by bending the signal lines after soldering and thus prevent the signal pads from being scrapped. At the same time, the signal lines can be cut relatively short to reduce impedance, which is better for the signal and ensures performance.

[0010] 3) The base and the top cover together form a shield, which can effectively prevent signal lines in high-speed cables from being interfered with;

[0011] 4) All units exist independently, meaning each base is limited to only one high-speed cable, which facilitates maintenance and replacement, and allows for arrangement according to needs to be suitable for more scenarios.

[0012] Based on the above technical solution, the present invention can be further improved as follows.

[0013] Furthermore, the section of the high-speed cable with a protective sleeve is located within the limiting hole and is limited by the limiting hole.

[0014] The further beneficial effect of adopting the above is that the limiting hole on the base of the solution limits the section of the high-speed cable with a protective sleeve, thereby reducing the risk of the high-speed cable becoming loose.

[0015] Furthermore, the base has grooves on both sides of the compartment on the surface away from the PCB board, which are respectively connected to the compartment and the limiting hole and serve as ground wire soldering positions.

[0016] The further beneficial effect of adopting the above is that when the signal wire in the high-speed cable enters the compartment through the limiting hole, the ground wire in the high-speed cable also enters the groove through the limiting hole at the same time. Subsequently, the ground wire can be soldered into the groove, which makes the soldering of the ground wire very convenient.

[0017] Furthermore, the section of the high-speed cable within the limiting hole has copper / aluminum foil. On the surface of the base away from the PCB board, a first solder hole communicating with the limiting hole is opened in the area of ​​the copper / aluminum foil in the high-speed cable. The top cover has a second solder hole communicating with the first solder hole. A solder block is inserted into the second solder hole and the first solder hole to weld the top cover, the base, and the copper / aluminum foil together.

[0018] The further beneficial effects of adopting the above are: welding the copper / aluminum foil in the top cover, base and high-speed cable together effectively reduces the risk of high-speed cable loosening, and the top cover and base have only one welding point, which facilitates repair.

[0019] Furthermore, the end of the top cover furthest from the high-speed cable is snapped into the base.

[0020] The further beneficial effects of adopting the above are: since there is only one welding point between the top cover and the base, the snap-fit ​​connection is used to ensure the stability of the fit between the top cover and the base, and to facilitate repairs.

[0021] Furthermore, a buckle is provided on the side of the top cover away from the high-speed cable, and a slot is provided on the side of the base. The buckle on the top cover is inserted into the slot on the base to achieve the connection between the top cover and the base.

[0022] The further beneficial effect of adopting the above is that after the welding relationship between the top cover and the base is removed, the snap-fit ​​structure makes it easy to remove the top cover from the base.

[0023] Furthermore, a positioning block is provided on each side of the top cover, and a positioning groove matching the positioning block is provided on each side of the base.

[0024] The further beneficial effect of adopting the above is that when the top cover is placed on the base, the positioning block enters the positioning groove to achieve positioning of the top cover and the base, which makes it easier to ensure assembly accuracy.

[0025] Furthermore, the PCB board has at least one grounding pad, and each base is soldered to one of the grounding pads on the PCB board. The top cover is made of tin-plated copper, and the base is made of tin-plated copper.

[0026] The further beneficial effect of adopting the above is that it facilitates grounding of the base.

[0027] Furthermore, the side of the top cover facing away from the high-speed cable has a slope.

[0028] The further beneficial effect of adopting the above is that when a PCB board has multiple adjacent bases along its length on the same side, the ramp on the top cover facilitates the passage of high-speed cables over another base in front of it, reducing the bending angle of the high-speed cables.

[0029] Based on the above technical solution, this utility model also provides an optical module, including a high-speed cable independent non-bending welded fixing structure.

[0030] The further beneficial effect of adopting the above is that it ensures that the performance of the high-speed optical module is not affected. Attached Figure Description

[0031] Figure 1 This is a diagram of the first layout structure for a freestanding, non-bending welded fixing structure for high-speed cables.

[0032] Figure 2 This is a diagram of the second layout structure for a high-speed cable independent, non-bending welded fixing structure.

[0033] Figure 3 First exploded view of the independent, non-bending welded fixing structure for high-speed cables;

[0034] Figure 4 Second exploded view of the independent, non-bending welded fixing structure for high-speed cables;

[0035] Figure 5 This is a partial enlarged view of the independent, non-bending welded fixing structure for high-speed cables.

[0036] Figure 6 This is a second enlarged view of a portion of the independent, bend-free, welded fixing structure for high-speed cables.

[0037] The attached diagram lists the components represented by each number as follows:

[0038] 1. PCB board, 110, signal pad, 120, ground pad; 2. High-speed cable, 210, signal line, 220, ground wire, 230, copper / aluminum foil; 3. Base, 310, compartment, 320, limiting hole, 330, groove, 340, first solder hole, 350, slot, 360, positioning groove; 4. Metal block; 5. Top cover, 510, second solder hole, 520, buckle, 530, positioning block, 540, ramp; 6. Solder block. Detailed Implementation

[0039] 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.

[0040] Example 1

[0041] like Figures 1-6 As shown, a high-speed cable independent, bend-free welding fixing structure includes:

[0042] PCB board 1 and high-speed cable 2. At least one grounding base 3 is fixed on PCB board 1, that is, the base 3 is made of metal. The number of bases 3 fixed on PCB board 1 can be one, two, four, six, twelve, etc. Since each base 3 is independent, they can be arranged in a 4+4+4+4 or 4+6+6 manner, such as... Figure 1 The diagram shows a 4+4+4+4 arrangement, as shown below. Figure 2 The diagram shows a 4+6+6 arrangement. Of course, this is just an example; you can arrange it according to your needs to suit more scenarios.

[0043] Each base 3 has a compartment 310, which can be understood as a hole penetrating the upper and lower surfaces of the base 3. The PCB board 1 has two signal pads 110 within the area enclosed by the compartment 310 of each base 3. Each signal pad 110 has a metal block 4 soldered onto it. Therefore, each base 3 has two metal blocks 4 within the area enclosed by the compartment 310. The metal blocks 4 can be copper, or other materials can be selected according to actual needs. Each base 3 has a limiting hole 320 on its side that communicates with the compartment 310. The cross-sectional dimensions of the limiting hole 320 are determined based on the cross-sectional dimensions of the high-speed cable 2 at the protective sleeve location; usually, the two are consistent. Each high-speed cable... The two signal lines 210 of cable 2 enter the compartment 310 through the limiting hole 320 on the base 3 and are horizontally welded to the two metal blocks 4 after the protective layer (insulating medium) is stripped off. That is, the signal lines 210 entering the compartment 310 are not bent. The section of the signal line 210 with the protective layer stripped off is preferably welded to the surface of the metal block 4 away from the PCB board. The ground wire 220 of each high-speed cable 2 is welded to the base 3. Since the base 3 is grounded, the ground wire 220 in the high-speed cable 2 is also grounded when the ground wire 220 is welded to the base 3. In addition, the base 3 is provided with a cover 5 that seals the opening of the compartment 310. The cooperation between the base 3 and the cover 5 forms a shield.

[0044] Example 2

[0045] like Figures 1-6 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0046] The section of the high-speed cable 2 with a protective sleeve is located within the limiting hole 320 and is limited by the limiting hole 320, thereby reducing the risk of the high-speed cable 2 becoming loose (usually referring to rotation).

[0047] Example 3

[0048] like Figure 4 , Figure 5 As shown, this embodiment is a further improvement on embodiment 1 or 2, as detailed below:

[0049] On the surface of the base 3 facing away from the PCB board, there is a groove 330 on each side of the compartment 310, which serves as a ground wire soldering position. That is, each base 3 has two grooves 330, and each groove 330 is connected to the compartment 310 and the limiting hole 320 respectively. When the signal line 210 in the high-speed cable 2 enters the compartment 310 through the limiting hole 320, the ground line 220 in the high-speed cable 2 also enters the groove 330 through the limiting hole 320 at the same time. The ground line 220 can then be soldered into the groove 330.

[0050] Example 4

[0051] like Figures 3-6 As shown, this embodiment is a further improvement on any one of embodiments 1 to 3, as detailed below:

[0052] The section of the high-speed cable 2 within the limiting hole 320 has copper / aluminum foil 230. On the surface of the base 3 facing away from the PCB board 1, a first solder hole 340 is opened in the area corresponding to the copper / aluminum foil 230 in the high-speed cable 2, which communicates with the limiting hole 320. The upper cover 5 has a second solder hole 510 connected to the first solder hole 340 at the corresponding location. A solder block 6 is inserted into the second solder hole 510 and the first solder hole 340 to weld the upper cover 5, the base 3, and the copper / aluminum foil 230 together, which effectively reduces the risk of the high-speed cable 2 becoming loose. The upper cover 5 and the base 3 have only one solder point, which is convenient for rework. Since the upper cover 5 and the base 3 are fixed by welding, the upper cover 5 is also made of metal.

[0053] Example 5

[0054] like Figure 3 , Figure 4 As shown, this embodiment is a further improvement on embodiment 4, as detailed below:

[0055] The end of the top cover 5 away from the high-speed cable 2 is snapped into the base 3. Since the top cover 5 and the base 3 only have one welding point, they are further engaged by snapping to ensure the stability of the fit between the top cover 5 and the base 3 and to facilitate repair.

[0056] As a further optimization of the above technical solution, a buckle 520 is provided on the side of the top cover 5 away from the high-speed cable 2, and a slot 350 is provided on the side of the base 3. The buckle 520 on the top cover 5 is inserted into the slot 350 on the base 3 to realize the snap-fit ​​connection between the top cover 5 and the base 3. After the welding relationship between the top cover 5 and the base 3 is removed, this snap-fit ​​structure makes it easy to remove the top cover 5 from the base 3.

[0057] Example 6

[0058] like Figures 1-4 As shown, this embodiment is a further improvement on any one of embodiments 1 to 5, as detailed below:

[0059] The upper cover 5 has a positioning block 530 on each side. The base 3 has a positioning groove 360 ​​on each side that matches the positioning block 530. When the upper cover 5 is placed on the base 3, the positioning block 530 enters the positioning groove 360 ​​to achieve positioning of the upper cover 5 and the base 3, which makes it easy to ensure assembly accuracy.

[0060] Example 7

[0061] like Figure 6 As shown, this embodiment is a further improvement on any one of embodiments 1 to 6, as detailed below:

[0062] The PCB board 1 has at least one grounding pad 120. Each base 3 is soldered to one of the grounding pads 120 on the PCB board 1 to facilitate grounding of the base 3. The top cover 5 is preferably made of tin-plated copper, and the base 3 is preferably made of tin-plated copper. Of course, in actual application, it is not excluded that the top cover 5 and the base 3 are made of other materials.

[0063] Example 8

[0064] like Figures 1-4 As shown, this embodiment is a further improvement on any one of embodiments 1 to 7, as detailed below:

[0065] The top cover 5 has a ramp 540 on the side away from the high-speed cable 2. When a PCB board 1 has multiple adjacent bases 3 along its length on the same side, the ramp 540 on the top cover 5 facilitates the high-speed cable 2 in another base 3 in front of it to pass over it, reducing the bending angle of the high-speed cable 2.

[0066] Example 9

[0067] An optical module includes a high-speed cable independent non-bending welded fixing structure as described in any of embodiments 1 to 8.

[0068] 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 independent, bend-free, welded fixing structure, characterized in that, include: The PCB board (1) and the high-speed cable (2) are provided. At least one grounded base (3) is fixed on the PCB board (1). Each base (3) has a compartment (310). The PCB board (1) has two signal pads (110) in the area enclosed by the compartment (310) of each base (3). Each signal pad (110) is soldered with a metal block (4). A limiting hole (320) communicating with the compartment (310) is opened on the side of each base (3). The two signal lines (210) of each high-speed cable (2) enter the compartment (310) through the limiting hole (320) on the base (3) and are horizontally soldered to the two metal blocks (4) after the protective layer is peeled off. The ground line (220) of each high-speed cable (2) is soldered to the base (3). The base (3) is provided with a cover (5) that seals the opening of the compartment (310).

2. The high-speed cable independent non-bending welded fixing structure according to claim 1, characterized in that, The section of the high-speed cable (2) with a protective sleeve is located within the limiting hole (320) and is limited by the limiting hole (320).

3. The high-speed cable independent non-bending welding fixing structure according to claim 1, characterized in that, The base (3) has grooves (330) on both sides of the compartment (310) on the surface away from the PCB board (1), which are respectively connected to the compartment (310) and the limiting hole (320) and serve as ground wire welding positions.

4. The high-speed cable independent non-bending welded fixing structure according to claim 1, characterized in that, The high-speed cable (2) has copper / aluminum foil (230) in the section within the limiting hole (320). The base (3) has a first solder hole (340) on the surface away from the PCB board (1) in the area corresponding to the copper / aluminum foil (230) in the high-speed cable (2) that communicates with the limiting hole (320). The upper cover (5) has a second solder hole (510) corresponding to the first solder hole (340) that communicates with it. A solder block (6) is inserted into the second solder hole (510) and the first solder hole (340) to weld the upper cover (5), the base (3) and the copper / aluminum foil (230) together.

5. The high-speed cable independent non-bending welding fixing structure according to claim 4, characterized in that, The end of the top cover (5) away from the high-speed cable (2) is snapped into the base (3).

6. The high-speed cable independent non-bending welding fixing structure according to claim 5, characterized in that, The top cover (5) has a buckle (520) on the side away from the high-speed cable (2), and the base (3) has a slot (350) on the side. The buckle (520) on the top cover (5) is inserted into the slot (350) on the base (3) to achieve the connection between the top cover (5) and the base (3).

7. The high-speed cable independent non-bending welded fixing structure according to claim 1, characterized in that, The upper cover (5) is provided with a positioning block (530) on each side, and the base (3) is provided with a positioning groove (360) on each side of the corresponding positioning block (530).

8. A high-speed cable independent non-bending welding fixing structure according to any one of claims 1 to 7, characterized in that, The PCB board (1) has at least one grounding pad (120), and each base (3) is soldered to one of the grounding pads (120) on the PCB board (1). The top cover (5) is made of tin-plated copper, and the base (3) is made of tin-plated copper.

9. The high-speed cable independent non-bending welding fixing structure according to claim 1, characterized in that, The top cover (5) has a slope (540) on the side opposite to the high-speed cable (2).

10. An optical module, characterized in that, Including the high-speed cable independent non-bending welded fixing structure as described in any one of claims 1 to 9.

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