Shell and 800G OSFP optical module

Abstract

The utility model relates to a shell which is formed by assembling a lower shell and an upper shell, the lower surface of the upper shell is provided with a first retaining wall which serves as a reinforcing rib and enters an inner cavity of the lower shell, and the two side faces of the lower shell in the length direction are respectively provided with an assembling groove used for being matched with two unlocking arms of a pull ring. The upper end of a second matching surface, used for abutting against two tongue pieces of the cage, in the assembling groove is higher than the tongue piece located at the high position, the lower end of the second matching surface is lower than the tongue piece located at the low position, and the distance between the first matching surface, used for abutting against a gear of the cage, of the lower shell and the second matching surface is 44.59 + / -0.08 mm. The 800G OSFP optical module comprises the above housing. The beneficial effects of the utility model are that: because the tongue piece at the low position and the tongue piece at the high position abut against the two second matching surfaces of the same lower shell and do not abut against the upper shell, even if the lower shell and the upper shell have an assembly segment difference, the consistency of the matching size is not influenced, and the signal quality can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of optical module technology, specifically to a housing and an 800G OSFP optical module. Background Technology

[0002] The 800G OSFP packaged optical module has a single-channel signal transmission rate of up to 100Gbps. The optical module and the switch are hot-swappable, meaning that the gold fingers on the PCB board of the optical module are inserted into the connector in the cage of the switch, and electrical signals are transmitted by making contact between the gold fingers and the spring contacts of the connector. Under normal circumstances, the contact point between the spring contacts and the gold fingers is in the middle of the gold fingers, while the tail section of the gold fingers has an end reflection problem. The reflected signal will damage the signal quality of the optical module. The higher the signal rate, the greater the impact of reflection on signal quality.

[0003] The existing 800G OSFP optical module uses a housing assembled from a lower housing and an upper housing. The upper and lower housings are separated by a design as follows: Figure 17 As shown, in this structure, the upper shell is designed to be relatively thick to avoid deformation. In this design, the lower shell has lower mounting grooves on its two sides along its length to accommodate the two unlocking arms of the pull ring, and the upper shell has upper mounting grooves on its two sides along its length to accommodate the two unlocking arms of the pull ring. Within the upper mounting grooves, there are stroke grooves to accommodate the protrusions on the unlocking arms. Therefore, when this type of shell is assembled with the pull ring, the lower end of each unlocking arm is in the lower mounting groove, and the upper end of each unlocking arm is in the upper mounting groove. Because the two tongues on both sides of the cage have different heights, when using this type of shell in an 800G... When an OSFP optical module is inserted into the cage, the lower tongue abuts against the lower mating surface of the lower mounting slot in the lower housing, and the higher tongue abuts against the upper mating surface of the upper mounting slot in the upper housing. Simultaneously, the two stops within the cage abut against the two first mating surfaces of the lower housing insertion end (front end). The protocol requires a horizontal dimension of 44.59±0.08mm between the upper and first mating surfaces, and also 44.59±0.08mm between the lower and first mating surfaces. However, due to the assembly stage difference between the upper and lower housings, the consistency of the mating dimensions is poor, and the horizontal dimension between the lower or upper mating surface and the first mating surface cannot be completely guaranteed to be 44.59±0.08mm. Conventional solutions typically only control it to 44.59±0.13mm. In low-speed optical modules, this design does not affect signal quality. However, in high-speed optical modules, due to the high precision required for the mating of the gold fingers and the spring contacts in the connector, poor consistency in the mating dimensions will affect signal quality. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a housing and an 800G OSFP optical module to overcome the shortcomings of the prior art.

[0005] The utility model discloses a technical scheme that solves the above technical problem.

[0006] A shell for 800G OSFP optical module is assembled by lower shell and upper shell, the lower surface of the upper shell is provided with a first baffle wall as a reinforcing rib and entering the inner cavity of the lower shell, the assembly slot for adapting two unlocking arms of the pull ring is set on the two sides of the length direction of the lower shell, the upper end of the second matching surface for abutting with the two tongues of the cage in the assembly slot is higher than the tongue in the high position, the lower end of the second matching surface is lower than the tongue in the low position, and the distance between the first matching surface for abutting with the stop position of the cage and the second matching surface of the lower shell is 44.59+ / -0.08mm.

[0007] On the basis of the above technical scheme, the utility model can also be improved as follows.

[0008] Further, the distance between the first matching surface for abutting with the stop position of the cage and the second matching surface of the lower shell is 44.59+ / -0.05mm.

[0009] Further, the lower surface of the upper shell is provided with a stroke slot for adapting the upper protruding block of the unlocking arm along the length direction on the two sides.

[0010] Further, the second matching surface has a groove for the complete entry of the unlocking block of the unlocking arm in the middle region.

[0011] Further, the height dimension of the first baffle wall is not less than 1.5mm, and the width dimension of the first baffle wall is not less than 0.5mm.

[0012] Further, the first baffle wall is distributed close to the cavity wall of the inner cavity of the lower shell.

[0013] Further, the first baffle wall is in U-shaped form, and the opening thereof faces the front end of the upper shell.

[0014] The utility model has the beneficial effect that since the tongue in the low position and the tongue in the high position abut against the two second matching surfaces of the same lower shell, and the abutment against the upper shell is cancelled, even if there is assembly step difference between the lower shell and the upper shell, the consistency of the matching dimension is not affected, so that the signal quality can be ensured.

[0015] Based on the above technical scheme, the utility model further provides an 800G OSFP optical module comprising the above shell.

[0016] The above further beneficial effect is that even if there is assembly step difference between the lower shell and the upper shell, the consistency of the matching dimension is not affected, so that the signal quality can be ensured.

[0017] Further, the 800G OSFP optical module further comprises a pull ring, two unlocking arms of the pull ring are respectively in sliding fit with assembly grooves on two side surfaces of the lower shell, a protrusion on the unlocking arm enters a stroke groove on a lower surface of the upper shell, and the two unlocking arms are only abutted against second fit surfaces of the assembly grooves under the elastic force of the reset spring. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a first perspective view of a shell in the utility model;

[0019] Figure 2 It is a second perspective view of the shell in the utility model;

[0020] Figure 3 It is an exploded view of the shell in the utility model;

[0021] Figure 4 It is an assembly drawing of the shell and the pull ring in the utility model;

[0022] Figure 5 It is an exploded view of the shell and the pull ring in the utility model;

[0023] Figure 6 It is a cross-sectional view of a cage in the utility model;

[0024] Figure 7 It is an exploded view of the 800G OSFP optical module in the utility model;

[0025] Figure 8 It is a first perspective view of an electromagnetic shielding structure in the utility model in an exploded state;

[0026] Figure 9 It is a second perspective view of the electromagnetic shielding structure in the utility model in an exploded state;

[0027] Figure 10 It is a width direction cross-sectional view of the electromagnetic shielding structure in the utility model;

[0028] Figure 11 It is a length direction cross-sectional view of the electromagnetic shielding structure in the utility model;

[0029] Figure 12 It is an assembly drawing of the lower shell and the PCB board in the utility model;

[0030] Figure 13 It is an exploded view of the lower shell and the PCB board in the utility model;

[0031] Figure 14 It is a structural view of the lower shell in the utility model;

[0032] Figure 15 It is a local enlarged view of Figure 13 ;

[0033] Figure 16 This is an assembly drawing of the outer shell and PCB board fixing structure in this utility model;

[0034] Figure 17 This is a diagram showing the parting lines between the upper and lower shells of a typical low-speed optical module.

[0035] The attached diagram lists the components represented by each number as follows:

[0036] 1. Lower shell, 110. Rib, 120. Second retaining wall, 121. First gap, 130. First cavity, 140. Second cavity, 150. Assembly slot, 151. Second mating surface, 160. First mating surface, 170. Groove, 2. Upper shell, 210. Glue groove, 220. First retaining wall, 221. Second gap, 230. Third retaining wall, 240. Stroke groove, 3. PCB board, 4. Pull ring, 410. Unlocking arm, 411. Protrusion, 412. Unlocking block, 5. Cage, 510. Gear, 520. Tongue. Detailed Implementation

[0037] 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.

[0038] Example 1

[0039] like Figures 1-6 As shown, a housing for an 800G OSFP optical module is assembled from a lower housing 1 and an upper housing 2. As a common solution, the lower housing 1 and the upper housing 2 are fastened with screws. The lower surface of the upper housing 2 is provided with a first baffle 220 that acts as a reinforcing rib and enters the inner cavity of the lower housing 1. Through this design, it can be ensured that even if the thickness of the edge of the upper housing 2 (i.e., the thickness of the area overlapping with the edge of the lower housing 1) is reduced, the upper housing 2 is not easily deformed, thereby increasing the thickness of the lower housing 1. Then the parting position between the upper housing 2 and the lower housing 1 will become higher.

[0040] The lower shell 1 has a mounting groove 150 on each of its two sides along its length. Because the thickness of the lower shell 1 increases, the height of the mounting groove 150 also increases. The mounting groove 150 penetrates the upper surface and the tail end face of the lower shell 1. This is a common configuration and will not be described in detail here. The two mounting grooves 150 on the two sides of the lower shell 1 are used to accommodate the two unlocking arms 410 of the pull ring 4. In this design, the structure of the pull ring 4 remains unchanged. The mounting groove 150 has a second mating surface 151 for abutting against the two tongues 520 of the cage 5. The upper end of the second mating surface 151 is higher than the higher tongue 520 of the two tongues 520, and the lower end of the second mating surface 151 is lower than the lower tongue 520 of the two tongues 520. The front end of the lower shell 1 has a first mating surface 160 on both sides of the inner cavity for abutting against the stop 510 of the cage 5. The distance between the first mating surface 160 of the lower shell 1 for abutting against the stop 510 of the cage 5 and the second mating surface 151 of the assembly groove 150 for abutting against the tongue 520 of the cage 5 is 44.59±0.08mm. When 800G When the OSFP optical module is inserted into the cage to a predetermined length, the stop 510 of the cage 5 will abut against the first mating surface 160 of the lower shell 1. The lower tongue 520 and the higher tongue 520 abut against the second mating surfaces 151 of the two mounting slots 150 respectively. Since the lower tongue 520 and the higher tongue 520 abut against the two second mating surfaces 151 of the same lower shell 1 and do not abut against the upper shell 2, even if there is a difference in the assembly steps between the lower shell 1 and the upper shell 2, it will not affect the consistency of the mating dimensions, thereby ensuring signal quality.

[0041] Example 2

[0042] like Figures 1-6 As shown, this embodiment is a further improvement on embodiment 1, as detailed below:

[0043] Because of the above structural design adopted in this solution, the distance between the first mating surface 160 and the second mating surface 151 of the lower shell 1 that abuts against the stop 510 of the cage 5 is 44.59±0.05mm, which is better than the agreed size.

[0044] Example 3

[0045] like Figure 1 , Figure 3 , Figure 5As shown, the embodiment is a further improvement on the basis of any one of embodiments 1-3, and the specific improvements are as follows: two travel grooves 240 are respectively formed on the lower surface of the upper shell 2 along the length direction on both sides, and the two travel grooves 240 on the lower surface of the upper shell 2 are adapted to the protrusions 411 on the two unlocking arms 410, when the pull ring 4 is assembled with the shell, the protrusions 411 enter the travel grooves 240, effectively preventing the unlocking arms 410 from falling off the shell.

[0046] Embodiment 4

[0047] As shown, the embodiment is a further improvement on the basis of any one of embodiments 1-3, and the specific improvements are as follows: Figure 1

[0048] The second matching surface 151 has a groove 170 in the middle region for the unlocking block 412 of the unlocking arm 410 to enter completely.

[0049] Embodiment 5

[0050] As shown, the embodiment is a further improvement on the basis of any one of embodiments 1-4, and the specific improvements are as follows: Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, the embodiment is a further improvement on the basis of any one of embodiments 1-4, and the specific improvements are as follows:

[0051] The height of the first barrier wall 220 is not less than 1.5mm, and the width of the first barrier wall 220 is not less than 0.5mm, of course, the size cannot be too large, which cannot occupy the layout space of the PCB board, and also does not affect the loading of the PCB board.

[0052] Further, the first barrier wall 220 is distributed near the inner cavity wall of the lower shell 1, as a further preferred scheme, the first barrier wall 220 is U-shaped, and the opening thereof faces the front end of the upper shell 2.

[0053] Embodiment 6

[0054] As shown, an 800G OSFP optical module includes a shell as described in any one of embodiments 1-5. Figure 7 As a further preferred scheme, the 800G OSFP optical module further includes: a pull ring 4, the two unlocking arms 410 of the pull ring 4 are respectively slidably matched with the assembly grooves 150 on the two sides of the lower shell 1, the protrusions 411 on the unlocking arms 410 enter the travel grooves 240 on the lower surface of the upper shell 2, and the two unlocking arms 410 are pressed against the second matching surface 151 of the assembly groove 150 under the elastic force of the reset spring.

[0055] As shown, the embodiment is a further improvement on the basis of any one of embodiments 1-4, and the specific improvements are as follows:

[0056] Figures 8-11 ​​As shown, as a further optimization of the above scheme, the electromagnetic shielding structure is improved:

[0057] The inner cavity on the upper surface of the lower shell 1 is used to accommodate the PCB board 3, that is, the subsequent PCB board 3 is placed in the inner cavity on the upper surface of the lower shell 1, and the upper surface of the lower shell 1 is provided with a rib 110 on both side edges of the inner cavity in the area corresponding to the PCB board 3, and the lower surface of the upper shell 2 is provided with a glue groove 210, the position and shape of the glue groove 210 match the position and shape of the rib 110, and the glue groove 210 is provided with EM I glue, when the upper shell 2 is assembled on the lower shell 1, the rib 110 on the lower shell 1 enters the glue groove 210 and compacts the EM I glue in the glue groove 210, and the first stop wall 220 of the lower surface of the upper shell 2 is distributed along the direction of the glue groove 210;

[0058] When the rib 110 enters the glue groove 210 and compacts the EM I glue in the glue groove 210, sealing is achieved to prevent electromagnetic wave leakage, and since the first stop wall 220 enters the inner cavity of the lower shell 1, a reverse stop is formed between the first stop wall 220 and the lower shell 1, which can also improve the electromagnetic shielding performance, the electromagnetic shielding structure can achieve double shielding of electromagnetic radiation, improve the shielding effect between the lower shell 1 and the upper shell 2, and avoid the position of the PCB board 3 without occupying the layout space of the PCB board 3.

[0059] Furthermore, the outer side surface of the first stop wall 220 is preferably coplanar with the inner groove surface of the glue groove 210.

[0060] The tail end of the rib 110 on the upper surface of the lower shell 1 on both sides of the inner cavity is outside the tail end of the PCB board 3, and the front end of the rib 110 on the upper surface of the lower shell 1 on both sides of the inner cavity is adjacent to the gold finger of the PCB board 3, which can cover the section of the PCB board 3 in the lower shell 1 and the upper shell 2, effectively preventing electromagnetic wave leakage.

[0061] The inner cavity of the lower shell 1 is provided with a second stop wall 120 distributed along the width direction thereof, and the inner cavity of the lower shell 1 is divided into a first cavity 130 and a second cavity 140 independent of each other by the second stop wall 120, and the first cavity 130 and the second cavity 140 are respectively used to accommodate the PCB board 3 and the ferrule, and two first slits 121 for the passage of optical fibers are vertically formed on the second stop wall 120, since the first slits 121 are only for the passage of optical fibers, the second stop wall 120 can form a barrier to improve the electromagnetic shielding performance.

[0062] The upper surface of the lower shell 1 is provided with a rib 110 on both side edges of the first cavity 130 and on the upper surface of the second stop wall 120, at this time, the rib 110 is in the shape of U, and since the rib 110 cooperates with the glue groove 210, the glue groove 210 is also in the shape of U, forming a barrier to the PCB board 3 in three directions except the gold finger end, thereby improving the electromagnetic shielding performance.

[0063] The U-shaped end of the first barrier wall 220 is provided with a vertical second gap 221 at each first gap 121.

[0064] A third barrier wall 230 is arranged on the lower surface of the upper shell 2 at the opening end of the first barrier wall 220 and can abut against the PCB 3. The third barrier wall 230 can also form a barrier to the PCB 3, thereby improving the electromagnetic shielding effect.

[0065] As shown in Figures 12-16 As a further improvement of the above-mentioned scheme, the structure for fixing the shell and the PCB is improved as follows:

[0066] The PCB 3 is arranged in the inner cavity of the lower shell 1. A positioning slot 310 is arranged on each of the lengthwise side edges of the PCB 3. Each positioning slot 310 is adjacent to a gold finger. A positioning column 180 is arranged in the inner cavity of the lower shell 1 and matches the positioning slot 310. At least one rib 6 is arranged between each side surface of the PCB 3 and the cavity wall of the inner cavity of the lower shell 1. The rib 6 between the side surface of the PCB 3 and the cavity wall of the inner cavity of the lower shell 1 forms a transition fit between the PCB 3 and the lower shell 1. At least one rib 6 is arranged between the side surface of the positioning column 180 and the slot wall of the positioning slot 310 of the PCB 3. The rib 6 between the side surface of the positioning column 180 and the slot wall of the positioning slot 310 of the PCB 3 forms a transition fit between the PCB 3 and the positioning column 180.

[0067] In the present scheme, the rib 6 is arranged at the corresponding position. When the PCB 3 is arranged in the lower shell 1, the rib 6 forms a transition fit between the PCB 3 and the lower shell 1 and a transition fit between the PCB 3 and the positioning column 180. Therefore, even if the lower shell 1 and the PCB 3 have a certain interference after being formed, they can still be assembled. This prevents the PCB 3 from shaking in the lower shell 1 and improves the consistency of the relative position of the PCB 3 and the lower shell 1. This prevents the gold finger of the PCB 3 from being relatively dispersed from the inner spring contact of the connector of the switch and ensures the stability of the signal.

[0068] The rib 6 is preferably wedge-shaped. As a further improvement of the present scheme, the upper end of the rib 6 is obliquely cut to form an oblique guide surface 610 facing the PCB 3. The oblique guide surface 610 allows the PCB 3 to be assembled in place by being lightly pressed.

[0069] Furthermore, a rib 6 is arranged between each side surface of the PCB 3 and the cavity wall of the inner cavity of the lower shell 1 at the tail end. The rib 6 between the side surface of the PCB 3 and the cavity wall of the inner cavity of the lower shell 1 is preferably fixed to the cavity wall of the inner cavity of the lower shell 1.

[0070] The side of the positioning column 180 close to the gold finger of the PCB 3 and the groove wall of the positioning groove 310 on the PCB 3 and the side of the positioning column 180 away from the gold finger of the PCB 3 and the groove wall of the positioning groove 310 on the PCB 3 are respectively provided with a rib 6 to make the PCB 3 and the positioning column 180 form a transition fit, and the rib 6 of the side of the positioning column 180 close to the gold finger of the PCB 3 and the groove wall of the positioning groove 310 on the PCB 3 and the rib 6 of the side of the positioning column 180 away from the gold finger of the PCB 3 and the groove wall of the positioning groove 310 on the PCB 3 are respectively preferably fixed with the side of the positioning column 180.

[0071] The side of the positioning column 180 close to the gold finger of the PCB 3 is an arc surface, and the surface of the positioning groove 310 opposite to the arc surface of the positioning column 180 is also an arc surface.

[0072] The lower shell 1 is assembled with the upper shell 2, and as a common solution, a threaded hole 181 is downwardly formed on the upper surface of the positioning column 180, the lower shell 1 and the upper shell 2 are fastened and connected by screws 7, the screws 7 are threadedly connected with the threaded hole 181 on the positioning column 180, and a screw fixing column does not need to be additionally designed.

[0073] Although the embodiments of the utility model have been shown and described above, it can be understood that the above-mentioned embodiments are exemplary and cannot be understood as the limitation of the utility model, and the ordinary skilled in the art can change, modify, replace and transform the above-mentioned embodiments within the scope of the utility model.

Claims

1. A housing for an 800G OSFP optical module, the housing comprising: It is assembled by lower shell (1) and upper shell (2), the lower surface of the upper shell (2) is provided with first barrier wall (220) as reinforcing rib and into the inner cavity of the lower shell (1), the lower shell (1) is respectively provided with assembly slot (150) on the two sides of its length direction to fit two unlocking arms (410) of pull ring (4), the upper end of second matching surface (151) in assembly slot (150) to resist two tongue (520) of cage (5) is higher than the higher tongue (520), the lower end of second matching surface (151) is lower than the lower tongue (520), the distance between first matching surface (160) of lower shell (1) to resist barrier (510) of cage (5) and second matching surface (151) is 44.59±0.08mm.

2. A housing according to claim 1, wherein The distance between first matching surface (160) of lower shell (1) to resist barrier (510) of cage (5) and second matching surface (151) is 44.59±0.05mm.

3. A housing according to claim 1, wherein, The lower surface of the upper shell (2) is provided with travel slot (240) on its two sides along the length direction to fit the upper protrusion (411) of unlocking arm (410).

4. A housing according to claim 1, wherein The second matching surface (151) has groove (170) in the middle area for the complete entry of unlocking block (412) of unlocking arm (410).

5. A housing according to claim 1, wherein The height of first barrier wall (220) is not less than 1.5mm, and the width of first barrier wall (220) is not less than 0.5mm.

6. A housing according to claim 1, wherein, The first barrier wall (220) is distributed near the cavity wall of lower shell (1) inner cavity.

7. A housing according to claim 6, wherein The first barrier wall (220) is U-shaped, and its opening is towards the front end of upper shell (2).

8. An 800G OSFP optical module, characterized in that, The outer shell according to any one of claims 1-7 is included.

9. The 800G OSFP optical module of claim 8, wherein, Also included are: Pull ring (4), two unlocking arms (410) of the pull ring (4) are respectively slidably matched with assembly slot (150) on the two sides of lower shell (1), the protrusion (411) on the unlocking arm (410) enters the travel slot (240) on the lower surface of upper shell (2), and the front end of two unlocking arms (410) is against the second matching surface (151) of assembly slot (150) under the elastic force of return spring.

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