An optical module

Abstract

This invention proposes an optical module, comprising: a housing with an internal assembly cavity, an assembly hole at one end of the housing, and several through holes; a sleeve with a fixing part at its inner end, a fixing groove in the fixing part, and a light-transmitting hole coaxial with the sleeve at the bottom of the fixing groove, the outer end of the sleeve protruding through the assembly hole to the outside of the housing; and a TO optical component fixed in the fixing groove, with its light receiving end and / or light emitting end facing the light-transmitting hole, and its electrical pins protruding through the through holes to the outside of the housing. This invention's miniature optical module, with the TO optical component's electrical pins protruding to the outside of the housing for connection to an external circuit board, eliminates the need for a circuit board inside the housing, thus reducing the module's size. The TO optical component requires no complex support fixtures, has a compact structure and high integration, further reducing module size and achieving miniaturized packaging of the optical module.

Description

Technical Field

[0001] This utility model belongs to the field of optical communication technology, specifically, it relates to a miniature optical module. Background Technology

[0002] With the development of optical communication technology, various types of optical modules with different packages have emerged to adapt to different application scenarios. Some packaging forms are often made with a larger package size to achieve certain specific functions, mostly because their internal circuit structure occupies a large space and the structural design between various components is not very reasonable.

[0003] These optical modules are heavy, consume a lot of power, and are bulky due to their large package size, making them inconvenient to use and unable to meet the needs of applications in confined spaces. Summary of the Invention

[0004] In order to solve the technical problem of the large packaging size of existing optical modules, this utility model proposes an optical module that can solve the above-mentioned problem.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] An optical module, comprising:

[0007] The outer shell has an assembly cavity inside, an assembly hole is provided at one end of the outer shell, and several wire passage holes are also provided on the outer shell;

[0008] A sleeve has a fixing part formed at its inner end. The fixing part has a fixing groove. A light-transmitting hole that communicates with and is coaxial with the sleeve is formed on the bottom of the fixing groove. The outer end of the sleeve protrudes through the assembly hole to the outside of the outer shell.

[0009] The TO optical component is fixed in the fixing slot, and the light receiving end and / or light emitting end of the TO optical component is arranged facing the light transmission hole. The electrical pins of the TO optical component protrude through the wire through hole to the outside of the housing.

[0010] In some embodiments, the housing includes:

[0011] The upper shell has an upper assembly notch at one end;

[0012] The lower shell is detachably connected to the upper shell. The lower shell has a lower assembly notch at the same end as the upper assembly notch. The upper assembly notch and the lower assembly notch together form an assembly hole. A threaded section is formed on the sleeve adjacent to the fixing part. The threaded section and the fixing part clamp to form a groove. The edge of the assembly hole is inserted into the groove. The fixing part is located inside the outer shell, and the threaded section is located outside the outer shell.

[0013] In some embodiments, an upper positioning part is provided on the lower surface of the upper shell, and a lower positioning part that cooperates with the upper positioning part is provided on the upper surface of the lower shell.

[0014] In some embodiments, the inner sides of the upper shell and the lower shell are respectively provided with support portions, and the support surface of the support portion matches the peripheral surface of the fixing portion.

[0015] In some embodiments, the peripheral surface of the fixing part includes a transversely arranged transverse mating surface, a vertically arranged vertical mating surface, and a transition surface connecting the transverse mating surface and the vertical mating surface.

[0016] In some embodiments, the lower ends of the two side walls of the upper shell are folded inward to form a snap-fit ​​portion, and the lower surface of the lower shell has a step that mates with the snap-fit ​​portion along the length direction of the snap-fit ​​portion, and the snap-fit ​​portion snaps into the step.

[0017] In some embodiments, the fixing part is also provided with an avoidance notch.

[0018] In some embodiments, a ceramic sleeve is provided inside the sleeve.

[0019] In some embodiments, a plurality of adhesive grooves are provided on the inner sidewall of the fixing part.

[0020] In some embodiments, a positioning groove is provided at the outer end of the sleeve along its length.

[0021] In some embodiments, the through hole is formed on the lower housing, and the electrical pin of the TO optical component is bent downward and passes through the through hole to protrude to the outside of the housing.

[0022] Compared with existing technologies, the advantages and positive effects of this utility model are as follows: In this utility model, the electrical pins of the TO optical component extend to the outside of the housing for connection to an external circuit board, eliminating the need for a circuit board inside the housing and reducing the overall size of the optical module. A sleeve is used, with a fixing groove at its inner end and the other end extending to the outside of the housing for connection to an external ST connector. Because the light-transmitting hole in the fixing groove is coaxially aligned with the sleeve, the TO optical component is fixed within the fixing groove, with the light receiving end and / or light emitting end facing the light-transmitting hole. This facilitates alignment of the light receiving end and / or light emitting end with the optical axis of the ST connector, eliminating the need for complex support and fixing components. The compact structure and high degree of integration further reduce the module size, achieving micro-packaging of the optical module.

[0023] Other features and advantages of this utility model will become clearer after reading the detailed description of the embodiments of this utility model in conjunction with the accompanying drawings. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of the micro optical module proposed in this utility model;

[0025] Figure 2 yes Figure 1 Exploded view;

[0026] Figure 3 This is a schematic diagram of the upper shell structure in one embodiment of the micro optical module proposed in this utility model;

[0027] Figure 4 yes Figure 3 A schematic diagram of the changing angle of the upper and middle shells;

[0028] Figure 5 This is a schematic diagram of the lower shell structure in one embodiment of the micro optical module proposed in this utility model;

[0029] Figure 6 This is a schematic diagram of the bottom structure of the lower shell in one embodiment of the micro optical module proposed in this utility model;

[0030] Figure 7 yes Figure 5 This is a schematic diagram of the sleeve structure in one embodiment of the micro optical module proposed in this utility model;

[0031] Figure 8 This is a schematic diagram of the seven types of sleeve angle changes;

[0032] Figure 9 This is a schematic diagram of the cross-sectional direction of the sleeve in one embodiment of the micro optical module proposed in this utility model;

[0033] Figure 10 yes Figure 9 A-direction cross-section;

[0034] Figure 11 This is a schematic diagram of the structure of the TO optical component in one embodiment of the micro optical module proposed in this utility model;

[0035] In the diagram: 1. Outer shell; 11. Through hole; 13. Upper shell; 130. Upper assembly notch; 131. Upper positioning part; 132. Snap-fit ​​part; 14. Lower shell; 140. Lower assembly notch; 141. Lower positioning part; 142. Step; 143. Fixed pin; 15. Support part; 2. Sleeve; 21. Fixing part; 211. Lateral mating surface; 212. Vertical mating surface; 213. Transition surface; 214. Clearance notch; 215. Dispensing groove; 216. Positioning groove; 217. Positioning post; 22. Fixing groove; 23. Light passage hole; 24. Threaded section; 25. Slot; 26. Ceramic sleeve; 3. TO optical component; 31. Electrical pin; 32. Lens; 33. TO optical component tube body; 34. TO base boss. Detailed Implementation

[0036] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] It should be noted that in the description of this invention, terms such as "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] Example 1: This example proposes a miniature optical module, such as... Figure 1 As shown, the device includes a housing 1, an assembly cavity is formed inside the housing 1 for accommodating the TO optical component 3, an assembly hole is provided at one end of the housing 1, and a plurality of wire holes 11 are also provided on the housing 1, the wire holes 11 connecting the assembly cavity and the outside of the housing 1.

[0041] This miniature optical module is particularly suitable for low-speed control optical modules.

[0042] The micro optical module also includes a sleeve 2, the inner end of which is located in the assembly cavity of the outer shell 1, and a fixing part 21 is formed at the inner end of the sleeve 2. The fixing part 21 has a fixing groove 22, and a light-transmitting hole 23 that communicates with and is coaxial with the sleeve 2 is provided on the bottom of the fixing groove 22. The outer end of the sleeve 2 protrudes through the assembly hole to the outside of the outer shell 1.

[0043] The TO optical component 3 is fixed in the fixing groove 22, and the light receiving end and / or light emitting end of the TO optical component 3 are arranged facing the light transmission hole 23. The electrical pin 31 of the TO optical component 3 protrudes to the outside of the housing 1 through the wire hole 11.

[0044] In this embodiment, the electrical pins 31 of the TO optical component 3 protrude to the outside of the housing 1 for connecting to an external circuit board. The housing 1 no longer encapsulates a circuit board, reducing the size of the optical module. A sleeve 2 is provided, with a fixing groove 22 at its inner end and the other end protruding to the outside of the housing 1 for connecting to an external ST connector. Since the light-transmitting hole 23 on the fixing groove 22 is coaxially aligned with the sleeve 2, the TO optical component 3 is fixed within the fixing groove 22. The light receiving end and / or light emitting end face the light-transmitting hole 23, facilitating alignment between the light receiving end and / or light emitting end and the optical axis of the ST connector. This eliminates the need for complex support and fixing components, resulting in a compact structure and high integration, further reducing the module size and achieving micro-packaging of the optical module.

[0045] The TO optical component 3 can achieve optical path coupling with the sleeve 2 through active coupling.

[0046] In some embodiments, the outer shell 1 includes an upper shell 13 and a lower shell 14, which are detachably connected and together form an assembly cavity. An upper assembly notch 130 is formed at one end of the upper shell 13, and a lower assembly notch 140 is formed at the same end of the lower shell 14. When the upper shell 13 and lower shell 14 are assembled, the upper assembly notch 130 and the lower assembly notch 140 form an assembly hole. A threaded section 24 is formed on the circumferential side of the sleeve 2 near the fixing part 21. A groove 25 is formed between the threaded section 24 and the fixing part 21, and the edge of the assembly hole is inserted into the groove 25 to support and limit the sleeve 2. The fixing part 21 is located inside the outer shell 1, and the threaded section 24 is located outside the outer shell 1.

[0047] To facilitate the alignment of the upper shell 13 and the lower shell 14 during assembly, in some embodiments, an upper positioning part 131 is provided on the lower surface of the upper shell 13, and a lower positioning part 141 that cooperates with the upper positioning part 131 is provided on the upper surface of the lower shell 14.

[0048] In some embodiments, the upper positioning part 131 is a block structure with protrusions and recesses. The lower positioning part 141 is also a block structure with recesses that match the protrusions of the upper positioning part 131 and protrusions that match the recesses of the upper positioning part 131. When the upper positioning part 131 and the lower positioning part 141 are aligned, the upper shell 13 and the lower shell 14 are accurately positioned and matched.

[0049] In order to support and fix the fixing part 21, in some embodiments, the inner sides of the upper shell 13 and the lower shell 14 are respectively provided with support parts 15, and the support surface of the support part 15 matches the peripheral surface of the fixing part 21.

[0050] Since the sleeve 2 is a tubular structure, in order to improve the stability of the sleeve 2 assembled in the outer shell 1 and prevent it from rotating, in some embodiments, the peripheral side of the fixing part 21 includes a transversely arranged transverse mating surface 211, a vertically arranged vertical mating surface 212, and a transition surface 213 connecting the transverse mating surface 211 and the vertical mating surface 212. When the sleeve 2 is fixed in the outer shell 1, the supporting surface of the supporting part 15 is in contact with each mating surface and the transition surface 213. The transverse mating surface 211 and the vertical mating surface 212 are planes, and the transition surface 213 can be a plane or an arc surface. Therefore, the peripheral side of the fixing part 21 is no longer an arc surface, which can prevent the sleeve 2 from rotating and avoid the problem of the TO optical component 3 deviating after the optical axis is aligned.

[0051] To facilitate the detachment of the upper shell 13 and the lower shell 14, in some embodiments, the lower ends of the side walls of the upper shell 13 are folded inward to form a snap-fit ​​portion 132, and the lower surface of the lower shell 14 has a step 142 formed along the length of the snap-fit ​​portion 132 to engage with it. The snap-fit ​​portion 132 engages with the step 142. The snap-fit ​​portion 132 has a certain degree of elasticity, which allows the upper shell 13 and the lower shell 14 to be assembled and fixed very easily, or to be detached.

[0052] In some embodiments, the fixing part 21 is also provided with a clearance notch 214. The clearance notch 214 is used to avoid the TO base boss 34.

[0053] In some embodiments, a ceramic sleeve 26 is provided inside the sleeve 2.

[0054] In some embodiments, the ceramic sleeve 26 has an inner diameter accuracy of 1-3 μm and is used for optical positioning.

[0055] The ceramic sleeve 26 and the sleeve 2 can be integrally processed by injection molding. The outer wall of the ceramic sleeve 26 is wrapped and fixed by the plastic material of the sleeve 2. The inner diameter of the ceramic sleeve 26 has a precision tolerance of 1-3µm, which allows for precise connection and fit of the optical path of the TO optical component 3.

[0056] In order to facilitate fixing the TO optical component 3 in the fixing part 21, in some embodiments, a plurality of adhesive grooves 215 are provided on the inner side wall of the fixing part 21, and the TO optical component 3 and the fixing part 21 are fixed with structural adhesive.

[0057] To facilitate fixing the outer shell 1 to the external structure, a fixing pin 143 is provided on the lower surface of the lower shell 14 to provide mechanical fixing for the optical module.

[0058] In some embodiments, the fixed pin 143 is made of tin bronze, which has high mechanical strength. The fixed pin 143 and the lower shell 14 can be integrally processed by injection molding.

[0059] In some embodiments, a positioning groove 216 is provided at the outer end of the sleeve 2 along its length, and a positioning post 217 is also provided on the peripheral side of the sleeve 2. The positioning post 217 cooperates with the groove of the ST connector for fixing the ST connector.

[0060] The threaded section 24 is used to engage with the nut for fixing the external optical module, thereby fixing the external structure of the optical module.

[0061] In some embodiments, the wire hole 11 is formed on the lower housing 14, and the electrical pin 31 of the TO optical component 3 is bent downward and passes through the wire hole 11 to protrude to the outside of the housing 1.

[0062] The electrical pins 31 of the TO optical component 3 can be bent and shaped using a bending fixture. The leads of the TO optical component 3 pass through the wire holes 11 of the lower housing 14 and protrude to the outside of the outer housing 1.

[0063] The bent electrical pins 31 can be fitted and fixed to the lower housing 14. The spacing between the electrical pins 31 should conform to the international standard for DIP leads, ensuring good module installation versatility and replaceability.

[0064] In some embodiments, the TO optical component 3 includes a lens 32, a TO optical component 3 body, and a TO base boss 34. The lens 32 provides optical focusing for the TO optical component 3. The TO optical component 3 and the sleeve 2 are optically aligned using active coupling, and structural adhesive is used to fix the TO optical component 3 and the sleeve 2 together to ensure that the TO optical component 3 has a stable optical path structure.

[0065] The miniature optical module of this embodiment has a small package size and light weight, which helps save space on the user's motherboard. It is used for the transmission of control signals and can be applied to fields such as ships.

[0066] Of course, the above description is not intended to limit the present utility model, and the present utility model is not limited to the examples given above. Any changes, modifications, additions or substitutions made by those skilled in the art within the scope of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. An optical module, characterized in that, include: The outer shell has an assembly cavity inside, an assembly hole is provided at one end of the outer shell, and several wire passage holes are also provided on the outer shell; A sleeve has a fixing part formed at its inner end. The fixing part has a fixing groove. A light-transmitting hole that communicates with and is coaxial with the sleeve is formed on the bottom of the fixing groove. The outer end of the sleeve protrudes through the assembly hole to the outside of the outer shell. The TO optical component is fixed in the fixing slot, and the light receiving end and / or light emitting end of the TO optical component is arranged facing the light transmission hole. The electrical pins of the TO optical component protrude through the wire through hole to the outside of the housing.

2. The optical module according to claim 1, characterized in that, The outer casing includes: The upper shell has an upper assembly notch at one end; The lower shell is detachably connected to the upper shell. The lower shell has a lower assembly notch at the same end as the upper assembly notch. The upper assembly notch and the lower assembly notch together form an assembly hole. A threaded section is formed on the circumference of the sleeve near the fixing part. The threaded section and the fixing part clamp to form a groove. The edge of the assembly hole is inserted into the groove. The fixing part is located on the inner side of the outer shell, and the threaded section is located on the outer side of the outer shell.

3. The optical module according to claim 2, characterized in that, An upper positioning part is provided on the lower surface of the upper shell, and a lower positioning part that cooperates with the upper positioning part is provided on the upper surface of the lower shell.

4. The optical module according to claim 2, characterized in that, The upper and lower shells are respectively provided with support parts on their inner sides, and the support surface of the support part matches the peripheral surface of the fixing part.

5. The optical module according to claim 4, characterized in that, The peripheral surface of the fixing part includes a transversely arranged transverse mating surface, a vertically arranged vertical mating surface, and a transition surface connecting the transverse mating surface and the vertical mating surface.

6. The optical module according to claim 2, characterized in that, The lower ends of the two side walls of the upper shell are folded inward to form a snap-fit ​​portion. The lower surface of the lower shell has a step that matches the snap-fit ​​portion along the length of the snap-fit ​​portion, and the snap-fit ​​portion snaps into the step.

7. The optical module according to any one of claims 1-6, characterized in that, A ceramic sleeve is installed inside the sleeve.

8. The optical module according to any one of claims 1-6, characterized in that, Several adhesive grooves are provided on the inner wall of the fixing part.

9. The optical module according to any one of claims 1-6, characterized in that, The outer end of the sleeve is provided with a positioning groove along its length.

10. The optical module according to any one of claims 2-6, characterized in that, The through hole is formed on the lower housing, and the electrical pin of the TO optical component is bent downward and passes through the through hole to protrude to the outside of the housing.

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