Small-size electrical isolation TOSA

Abstract

The utility model relates to a small-size electrical isolation TOSA, TO-CAN is sequentially and coaxially connected with a tube body, an adjusting ring, an LC ceramic ferrule crimping metal seat, an insulating part and an LC adapter metal head, and two ends of an LC opening ceramic ring are respectively and coaxially embedded in the LC ceramic ferrule crimping metal seat and the LC adapter metal head. The front end of the LC ceramic ferrule is crimped in the LC ceramic ferrule crimping metal seat, the tail end of the LC ceramic ferrule extends into the LC open ceramic ring, and an air gap with the height of 0.1-0.3 mm is formed between the LC adapter metal head and the LC ceramic ferrule crimping metal seat. The beneficial effects are that the LC ceramic ferrule in the TOSA only needs to be crimped once, and the total length can be reduced by 0.9 mm-1. 1mm under the condition of ensuring that the metal head of the LC adapter, the crimping metal seat of the LC ceramic ferrule and the TO-CAN form electrical isolation, so that the PCB layout is facilitated when an optical module is applied.

Description

Technical Field

[0001] The utility model relates to the technical field of TOSA, in particular to a small-size electrical isolation TOSA. Background Art

[0002] The traditional TOSA includes: LC ceramic ferrule, LC open ceramic ring, TO-CAN, tube body, adjustment ring, LC ceramic ferrule crimping metal seat and LC adapter metal head. TO-CAN, tube body, adjustment ring and LC ceramic ferrule crimping metal seat are coaxially connected in sequence. The front end of the LC ceramic ferrule is combined with the LC ceramic ferrule crimping metal seat by crimping, and the tail end of the LC ceramic ferrule is combined with the LC adapter metal head by crimping. The LC open ceramic ring is embedded in the LC adapter metal head, and the LC open ceramic ring is sleeved on the LC ceramic ferrule. Figure 1 As shown, in order to ensure that the LC adapter metal head is electrically isolated from the LC ceramic ferrule crimping metal seat and TO-CAN, the LC ceramic ferrule is relatively long. In order to ensure the crimping strength, the crimping length of the LC ceramic ferrule, the LC ceramic ferrule crimping metal seat and the LC adapter metal head is at least 1mm, which makes the total length of the LC ceramic ferrule increase by 1mm. When used in optical modules, an overly long TOSA leads to a small layout space for the PCB board. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a small-sized electrically isolated TOSA to overcome the deficiencies in the above-mentioned prior art.

[0004] The utility model solves the above technical problems with the following technical solutions: a small-size electrically isolated TOSA, comprising: an LC ceramic ferrule, an LC open ceramic ring and a TO-CAN, wherein a tube body, an adjustment ring, an LC ceramic ferrule crimping metal seat, an insulating member and an LC adapter metal head are coaxially connected to the TO-CAN in sequence, two ends of the LC open ceramic ring are coaxially embedded in the LC ceramic ferrule crimping metal seat and the LC adapter metal head respectively, a front end of the LC ceramic ferrule is crimped in the LC ceramic ferrule crimping metal seat, a rear end of the LC ceramic ferrule extends into the LC open ceramic ring, and an air gap with a height of 0.1 mm to 0.3 mm is provided between the LC adapter metal head and the LC ceramic ferrule crimping metal seat.

[0005] The beneficial effect of the utility model is that the LC ceramic ferrule in the TOSA is only crimped once, that is, the LC ceramic ferrule is only crimped on the LC ceramic ferrule crimping metal seat, and because the LC ceramic ferrule crimping metal seat is connected to the LC adapter metal head via an insulating member, the total length of the TOSA can be reduced by 0.9 mm to 1.1 mm while ensuring that the LC adapter metal head, the LC ceramic ferrule crimping metal seat and the TO-CAN are electrically isolated, which facilitates PCB layout when used in optical modules.

[0006] On the basis of the above technical solution, the present invention can also be improved as follows.

[0007] Furthermore, the height of the air gap is 0.2 mm.

[0008] A further beneficial effect of the above method is that the total length of the TOSA can be reduced by 1.0 mm.

[0009] Furthermore, the insulating member and the LC ceramic ferrule crimping metal seat are bonded with epoxy structural glue.

[0010] Furthermore, the insulating member is combined with the metal head of the LC adapter by crimping.

[0011] Furthermore, the insulating part is an I-shaped metal part that is subjected to insulation treatment.

[0012] Furthermore, a positioning step is provided on the LC ceramic ferrule crimping metal seat.

[0013] A further beneficial effect of adopting the above method is that the assembly position of the insulating member can be ensured to be accurate.

[0014] Furthermore, an optical isolator is coupled between the LC ceramic ferrule and the TO-CAN, and the optical isolator is fixed in the LC ceramic ferrule crimping metal seat.

[0015] The above method has the further beneficial effect that if the application module does not require an optical isolator, the optical isolator may not be coupled between the LC ceramic ferrule and the TO-CAN. If the optical isolator is not coupled, the total length of the TOSA may be shortened accordingly.

[0016] Furthermore, the TO-CAN uses a 6.5mm focal length aspherical TO-CAN.

[0017] The above further beneficial effects are: using a non-spherical 6.5mm focal length lens, the coupling efficiency is higher than 30%, the built-in optical isolator, the application range is wide, and the shorter focal length is used, so that the total length of the TOSA can be shortened accordingly. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a structural diagram of TOSA in the prior art;

[0019] Figure 2 It is a structural diagram of the small and medium-sized electrically isolated TOSA of the utility model.

[0020] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0021] 1. LC ceramic ferrule, 2. LC open ceramic ring, 3. TO-CAN, 4. Tube body, 5. Adjustment ring, 6. LC ceramic ferrule crimping metal seat, 7. Insulator, 8. LC adapter metal head, 9. Air gap, 10. Optical isolator. DETAILED DESCRIPTION

[0022] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0023] Example 1

[0024] like Figure 2 As shown, a small-size electrically isolated TOSA comprises: an LC ceramic ferrule 1, an LC open ceramic ring 2, a TO-CAN 3, a tube body 4, an adjustment ring 5, an LC ceramic ferrule crimping metal seat 6, an insulating member 7 and an LC adapter metal head 8, wherein the TO-CAN 3, the tube body 4, the adjustment ring 5, the LC ceramic ferrule crimping metal seat 6, the insulating member 7 and the LC adapter metal head 8 are coaxially connected in sequence, the two ends of the LC open ceramic ring 2 are coaxially embedded in the LC ceramic ferrule crimping metal seat 6 and the LC adapter metal head 8 respectively, the front end of the LC ceramic ferrule 1 is crimped in the LC ceramic ferrule crimping metal seat 6, and the rear end of the LC ceramic ferrule 1 extends into In the LC open ceramic ring 2, there is an air gap 9 with a height of 0.1mm-0.3mm between the LC adapter metal head 8 and the LC ceramic ferrule crimping metal seat 6. In the TOSA, the LC ceramic ferrule 1 is only crimped once, that is, the LC ceramic ferrule 1 is only crimped on the LC ceramic ferrule crimping metal seat 6. Since the LC ceramic ferrule crimping metal seat 6 and the LC adapter metal head 8 are connected via the insulating member 7, the total length of the TOSA can be reduced by 0.9mm-1.1mm while ensuring that the LC adapter metal head 8 is electrically isolated from the LC ceramic ferrule crimping metal seat 6 and the TO-CAN 3. When applied in an optical module, PCB layout is convenient.

[0025] Example 2

[0026] like Figure 2 As shown, this embodiment is a further improvement on the basis of embodiment 1, and the details are as follows:

[0027] The height of the air gap 9 is preferably 0.2 mm, so that the overall length of the TOSA can be reduced by 1.0 mm.

[0028] Example 3

[0029] like Figure 2 As shown, this embodiment is a further improvement on the basis of Embodiment 1 or 2, and the details are as follows:

[0030] The insulating member 7 and the LC ceramic ferrule crimping metal seat 6 are bonded by epoxy structural glue, and the insulating member 7 and the LC adapter metal head 8 are combined by crimping.

[0031] Example 4

[0032] like Figure 2 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 3, and the details are as follows:

[0033] The insulating member 7 is an I-shaped metal member that has been subjected to insulation treatment. The insulation treatment may be performed by oxidation and blackening, so that the I-shaped metal member becomes an insulating member.

[0034] Example 5

[0035] like Figure 2 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 4, and the details are as follows:

[0036] A positioning step is provided on the LC ceramic ferrule crimping metal seat 6 in the section matching with the insulating member 7, so as to ensure the accurate assembly position of the insulating member 7.

[0037] Example 6

[0038] like Figure 2 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 5, and the details are as follows:

[0039] If the application module requires the optical isolator 10, the optical isolator 10 can be coupled between the LC ceramic ferrule 1 and the TO-CAN 3, and the optical isolator 10 is fixed in the LC ceramic ferrule crimping metal seat 6. If the application module does not need the optical isolator 10, the optical isolator 10 can be not coupled between the LC ceramic ferrule 1 and the TO-CAN 3. If the optical isolator 10 is not coupled, the total length of the TOSA can be shortened accordingly.

[0040] Example 7

[0041] like Figure 2 As shown, this embodiment is a further improvement on any one of Embodiments 1 to 6, and the details are as follows:

[0042] TO-CAN3 adopts 6.5mm focal length non-spherical TO-CAN, with coupling efficiency higher than 30%, built-in optical isolator, wide application range, and shorter focal length, so that the total length of TOSA can be shortened accordingly.

[0043] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A small-size electrically isolated TOSA, characterized in that: include: An LC ceramic ferrule (1), an LC open ceramic ring (2) and a TO-CAN (3); the TO-CAN (3) is coaxially connected with a tube body (4), an adjustment ring (5), an LC ceramic ferrule crimping metal seat (6), an insulating member (7) and an LC adapter metal head (8) in sequence; the two ends of the LC open ceramic ring (2) are coaxially embedded in the LC ceramic ferrule crimping metal seat (6) and the LC adapter metal head (8), respectively; the front end of the LC ceramic ferrule (1) is crimped in the LC ceramic ferrule crimping metal seat (6); the rear end of the LC ceramic ferrule (1) extends into the LC open ceramic ring (2); and an air gap (9) with a height of 0.1 mm to 0.3 mm is provided between the LC adapter metal head (8) and the LC ceramic ferrule crimping metal seat (6).

2. A small-size electrically isolated TOSA according to claim 1, characterized in that: The height of the air gap (9) is 0.2 mm.

3. A small-size electrically isolated TOSA according to claim 1, characterized in that: The insulating member (7) and the LC ceramic ferrule crimping metal seat (6) are bonded with epoxy structural glue.

4. A small-size electrically isolated TOSA according to claim 1, characterized in that: The insulating member (7) and the LC adapter metal head (8) are combined by crimping.

5. The small-size electrically isolated TOSA according to claim 1, characterized in that: The insulating member (7) is an I-shaped metal member that has been subjected to insulation treatment.

6. A small-size electrically isolated TOSA according to any one of claims 1 to 5, characterized in that: The LC ceramic ferrule crimping metal seat (6) is provided with a positioning step in a section matching with the insulating member (7).

7. A small-size electrically isolated TOSA according to any one of claims 1 to 5, characterized in that: An optical isolator (10) is coupled between the LC ceramic ferrule (1) and the TO-CAN (3), and the optical isolator (10) is fixed in a LC ceramic ferrule crimping metal seat (6).

8. A small-size electrically isolated TOSA according to any one of claims 1 to 5, characterized in that: The TO-CAN (3) is a 6.5 mm focal length aspherical TO-CAN.

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