Pin and jack type self-floating beam expanding contact

Abstract

The utility model discloses a pin and jack type self-floating beam expanding contact, which comprises an inner sleeve. An inner ceramic ferrule and a lens are arranged in the outer ceramic ferrule, the end, away from the lens, of the inner ceramic ferrule extends out of the end face of the outer ceramic ferrule and is in interference press fit with the interior of the inner sleeve, and the end face of the outer ceramic ferrule abuts against the end face of the inner sleeve; the periphery of the outer ceramic ferrule is sleeved with a lens and a ceramic protection tube, and the two ends of the lens abut against the end face of the inner sleeve and the end face of the ceramic protection tube respectively. The contact element utilizes the characteristic of accurate light transmission of a beam expanding contact element, no spring is arranged at two ends, the structure of the contact element is optimized, and the contact element has a smaller appearance size, is beneficial to improving the arrangement density of the contact element of an adaptive connector, reduces the tail space of the connector, can greatly improve the floatability of the contact element by arranging a chamfer, and improves the reliability of the contact element. Meanwhile, the wall thickness of the ceramic protection tube is increased, the centering force constraint of the ceramic protection tube can be effectively improved, the pin and jack centering is ensured, and the insertion loss is reduced.

Description

A pin-and-socket type self-floating beam expander contact Technical Field

[0001] This utility model belongs to the field of optical fiber contact technology, and particularly relates to a pin-and-socket type self-floating beam expander contact. Background Technology

[0002] Beam expander optical contacts are fundamental core components in the field of optical fiber communication. They are mating contacts used in non-contact optical fiber connectors. They function to compress the diverging beam emitted from the optical fiber into a collimated beam through a self-focusing lens, transmit it over a spatial distance, and then be focused into another self-focusing lens, where it is focused into a point light source and coupled into the optical fiber.

[0003] Conventional optical fiber expander contacts typically incorporate springs to ensure a tight fit between the ceramic ferrule ends after mating. Additionally, when one end is mated, the fiber retracts, requiring sufficient space at the tail for cable retraction. This presents two problems: first, the spring design increases the overall outer diameter of the fiber contact, leading to a larger spacing between the contacts and a larger connector; second, spring compression and fiber retraction necessitate a longer connector tail for safe retraction, resulting in a longer connector design. These two factors contribute to a larger connector size, failing to meet the miniaturization and high-density requirements of current products.

[0004] Meanwhile, conventional beam-expanding optical contacts, due to beam expansion, no longer have large chamfers on the ceramic ferrule. When the contacts are mated, the guiding ability is greatly reduced. However, beam-expanding products are very sensitive to the mating angle. Therefore, conventional beam-expanding contacts are easy to assemble into connectors with increased insertion loss, thereby affecting the performance of the product and failing to meet the requirements of low-loss application scenarios. Summary of the Invention

[0005] This utility model addresses the problems in the prior art by proposing the following technical solution:

[0006] A pin-and-socket type self-floating beam expander contact includes:

[0007] Inner sleeve;

[0008] The outer ceramic ferrule contains an inner ceramic ferrule and a lens. The end of the inner ceramic ferrule furthest from the lens extends out of the end face of the outer ceramic ferrule and is press-fitted into the interior of the inner sleeve. The end face of the outer ceramic ferrule abuts against the end face of the inner sleeve.

[0009] The outer ceramic insert is surrounded by a lens and a ceramic protective tube, with the two ends of the lens abutting against the end faces of the inner sleeve and the ceramic protective tube, respectively.

[0010] As a preferred embodiment of the above technical solution, the lens is installed inside the outer ceramic ferrule by adhesive bonding, and the outer end face of the lens is recessed inside the outer ceramic ferrule.

[0011] As a preferred embodiment of the above technical solution, the inner ceramic ferrule is installed inside the outer ceramic ferrule by interference fit.

[0012] As a preferred embodiment of the above technical solution, a convex key is provided on the outer edge of the end face of the inner sleeve near the lens.

[0013] As a preferred embodiment of the above technical solution, the inner edge of the end face of the ceramic protective tube away from the lens is chamfered.

[0014] As a preferred embodiment of the above technical solution, the wall thickness of the ceramic protective tube is 0.4mm-0.6mm.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. This practical contact utilizes the optical transmission characteristics of the beam expander contact. It has no springs at either end, optimizes the contact structure, and has a smaller overall size, which is beneficial to improving the contact arrangement density of the adapter connector, while reducing the space at the tail of the connector.

[0017] 2. The inner edge of the end face of the ceramic tube away from the lens is chamfered, which can significantly improve the floating of the contact. At the same time, the increased wall thickness of the ceramic tube can effectively improve the centering force constraint of the ceramic tube, ensure the centering of the pin and the hole, and reduce the insertion loss.

[0018] 3. The outer end face of the lens is recessed and installed inside the outer ceramic ferrule, which helps to ensure the good condition of the outer end face of the lens and reduce the probability of damage.

[0019] 4. The inner sleeve has a raised key on the outer edge of the end face near the lens, which can cooperate with the connector slot to orient and position the contact, ensuring the consistency of insertion loss during repeated insertion and removal of the connector. Attached Figure Description

[0020] Figure 1 shows a front view of a pin-and-socket type self-floating expander contact in an embodiment;

[0021] Figure 2 shows a front sectional view of a pin-and-socket type self-floating expander contact in an embodiment;

[0022] Figure 3 shows a front view of the inner sleeve and outer ceramic ferrule after installation in a pin-and-socket type self-floating expander contact in an embodiment.

[0023] Figure 4 shows a front sectional view of the inner sleeve and outer ceramic ferrule after installation in a pin-and-socket type self-floating expander contact in an embodiment.

[0024] In the diagram: 10, inner sleeve; 12, convex key; 20, outer ceramic ferrule; 30, inner ceramic ferrule; 40, lens; 50, ceramic sheath; chamfer, bevel. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments.

[0026] Example

[0027] As shown in Figures 1 and 2, a pin-and-socket type self-floating expander contact includes:

[0028] Inner sleeve 10;

[0029] An outer ceramic ferrule 20 is provided inside an inner ceramic ferrule 30 and a lens 40. The end of the inner ceramic ferrule 30 away from the lens 40 extends out of the end face of the outer ceramic ferrule 20 and is press-fitted into the interior of the inner sleeve 10. The end face of the outer ceramic ferrule 20 abuts against the end face of the inner sleeve 10.

[0030] The outer ceramic insert 20 is surrounded by a lens 40 and a ceramic protective tube 50, with the two ends of the lens 40 abutting against the end faces of the inner sleeve 10 and the ceramic protective tube 50, respectively.

[0031] The beam expander contact itself is for spatial light collimation transmission. The end faces of the contact do not need to make direct contact during docking. Therefore, the contact at both ends of the pin and socket in this practical design does not have springs, so as to reduce the radial and axial space of the connector and meet the requirements of miniaturization and high density of the connector.

[0032] The lens 40 is installed inside the outer ceramic ferrule 20 by adhesive bonding, and the outer end face of the lens 40 is recessed inside the outer ceramic ferrule 20.

[0033] The outer end face of the lens 40 is recessed and installed inside the outer ceramic insert 20, which helps to ensure the good condition of the outer end face of 40 and reduce the probability of damage.

[0034] The inner ceramic ferrule 30 is installed inside the outer ceramic ferrule 20 by interference fit. In practical applications, it can also be installed by bonding, small clearance fit, or other methods.

[0035] The inner sleeve 10 has a protruding key 12 on the outer edge of the end face near the lens 40; it can cooperate with the connector slot to orient and position the contact, and ensure the consistency of the insertion loss of the connector during repeated insertion and removal.

[0036] As a preferred embodiment of the above technical solution, the inner edge of the end face of the ceramic protective tube 50 away from the lens 40 is chamfered 51, which can significantly improve the floating property of the contact. At the same time, the increased wall thickness of the ceramic protective tube can effectively improve the centering force constraint of the ceramic protective tube, ensure the centering of the pin and the insertion hole, and reduce the insertion loss.

[0037] The ceramic protective tube 50 has a wall thickness of 0.4mm-0.6mm. This thicker design increases the reliability of the ceramic protective tube 50, preventing breakage and other failure modes.

[0038] Increased centering force effectively ensures the alignment of pin and socket contacts.

[0039] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A pin-and-socket type self-floating beam expander contact, characterized in that, include: Inner sleeve (10); outer ceramic ferrule (20), the inner ceramic ferrule (30) and lens (40) are provided inside the outer ceramic ferrule (20), the end of the inner ceramic ferrule (30) away from the lens (40) extends out of the end face of the outer ceramic ferrule (20) and is press-fitted into the inner sleeve (10), and the end face of the outer ceramic ferrule (20) abuts against the end face of the inner sleeve (10); the outer ceramic ferrule (20) is surrounded by a lens (40) and a ceramic protective tube (50), and the two ends of the lens (40) abut against the end faces of the inner sleeve (10) and the ceramic protective tube (50) respectively.

2. The pin-and-socket type self-floating expander contact according to claim 1, characterized in that, The lens (40) is installed inside the outer ceramic ferrule (20) by adhesive bonding, and the outer end face of the lens (40) is recessed inside the outer ceramic ferrule (20).

3. The pin-and-socket type self-floating expander contact according to claim 1, characterized in that, The inner ceramic ferrule (30) is installed inside the outer ceramic ferrule (20) by interference fit.

4. A pin-and-socket type self-floating expander contact according to claim 1, characterized in that, The inner sleeve (10) has a protruding key (12) on the outer edge of the end face near the lens (40).

5. A pin-and-socket type self-floating expander contact according to claim 1, characterized in that, The ceramic protective tube (50) has a chamfer (51) on the inner edge of the end face away from the lens (40).

6. A pin-and-socket type self-floating expander contact according to claim 1, characterized in that, The wall thickness of the ceramic protective tube (50) is 0.4mm-0.6mm.

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