CN115291337A - MT interface optical fiber connecting and fixing device - Google Patents
MT interface optical fiber connecting and fixing device Download PDFInfo
- Publication number
- CN115291337A CN115291337A CN202210875603.0A CN202210875603A CN115291337A CN 115291337 A CN115291337 A CN 115291337A CN 202210875603 A CN202210875603 A CN 202210875603A CN 115291337 A CN115291337 A CN 115291337A
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- fiber optic
- optic connection
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- 239000013307 optical fiber Substances 0.000 title abstract description 35
- 239000000835 fiber Substances 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 5
- 238000003825 pressing Methods 0.000 claims description 4
- 230000003287 optical effect Effects 0.000 abstract description 13
- 238000011161 development Methods 0.000 abstract description 5
- 238000005452 bending Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 6
- 238000001125 extrusion Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3869—Mounting ferrules to connector body, i.e. plugs
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
- G02B6/3881—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using grooves to align ferrule ends
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Light Guides In General And Applications Therefor (AREA)
Abstract
Compared with the prior art, the MT interface optical fiber connection and fixing device disclosed by the application comprises: a first housing structure; a second housing structure mated with the first housing structure; a first inner structure disposed inside the first outer shell structure; a second inner structure disposed inside the second outer shell structure; the first inner structure and the second inner structure are respectively provided with a groove structure, and the groove structures are used for placing MT interfaces; and the connecting and fastening structure is used for connecting and fastening the first shell structure and the second shell structure. Compared with the prior art, the technical scheme provided by the invention can facilitate MT interface connection and fixation, avoid the problems of bending and damage of the optical fiber, protect short-distance optical fiber interconnection in a case, and facilitate application and development of chip-level optical interconnection.
Description
Technical Field
The present application relates to the field of optical fiber communication technologies, and more particularly, to an optical fiber connection and fixation device for an MT interface.
Background
At present, various processing chips in a data center are electrically interconnected to exchange data, and with the continuous improvement of the speed of electrical signals, the problems of short distance, increased power consumption, frequent crosstalk, limited bandwidth and the like occur, and due to some inherent constraints of electrical signal transmission, such as the requirement of equidistant layout of differential lines, system expansion is difficult, and further development of computers, communication technologies and related industries is seriously influenced. Currently, optical interconnects are penetrating from long to short distances, and chip-level optical interconnects need to highly integrate components such as digital circuits, analog circuits, optical transceivers, and the like together to achieve the purpose of integration with application chips.
In the prior art, an MT interface or an MPO interface is adopted for the external optical interconnection, an optical fiber of the MPO interface is applied to the chip-level optical interconnection, the structure and the size of the optical interconnection are relatively bulkier, the internal part of the optical interconnection is still the MT interface, only a buckle and a spring device are additionally arranged on the external part of the optical interconnection, and an optical fiber protective sleeve is larger in size and is suitable for the external connection.
Therefore, it is an urgent technical objective of the present invention to provide an optical fiber connection and fixation device with an MT interface, which can facilitate the connection and fixation of the MT interface and avoid the problem that the optical fiber is easily bent and damaged.
Disclosure of Invention
In order to solve the technical problem, the application provides an MT interface optical fiber connection and fixing device, which can facilitate MT interface connection and fixation, and avoid the problem that optical fibers are easily bent and damaged.
The technical scheme provided by the application is as follows:
the application provides an MT interface optical fiber connection and fixing device, includes: a first housing structure;
a second housing structure mated with the first housing structure; a first inner structure disposed inside the first outer shell structure; a second inner structure disposed inside the second outer shell structure; the first inner structure and the second inner structure are respectively provided with a groove structure, and the groove structures are used for placing MT interfaces; and the connecting and fastening structure is used for connecting and fastening the first shell structure and the second shell structure.
Further, in a preferred mode of the present invention, the connection fastening structure includes: the buckle structure is arranged on the first shell structure; the bayonet structure is arranged on the second shell; the bayonet structure is matched and connected with the buckle structure.
Further, in a preferred mode of the present invention, the number of the fastening structures is specifically 4, and the fastening structures are distributed on the first housing structure; the bayonet structures are four in number and are distributed on the second shell.
Furthermore, the first inner structure and the second inner structure are made of rubber materials.
Further, in a preferred mode of the present invention, the connection fastening structure includes:
the hinge rotating shaft is connected with the first shell structure and the second shell interface;
the buckle structure is arranged on the first shell structure and is arranged on one side opposite to the hinged rotating shaft;
and the bayonet structure is arranged on the second shell structure and on the opposite side of the hinged rotating shaft.
Further, in a preferred aspect of the present invention, the method further includes: the compressing structure is arranged on the first inner structure and/or the second inner structure and used for pressing the MT interface in a propping mode, and the compressing structure is arranged close to one side of the hinged rotating shaft.
Further, in a preferred aspect of the present invention, the method further includes: and the perspective window structure is arranged on the first shell structure and/or the second shell structure.
Further, in a preferred aspect of the present invention, the method further includes: the through hole structure is arranged on the first inner structure, and the groove structure is arranged on the second inner structure.
Further, in a preferred aspect of the present invention, the method further includes: and the fixing structure is arranged on the first shell structure and/or the second shell structure and is used for being fixedly connected to a PCB or a case.
Further, in a preferred mode of the present invention, the fixing structure is a stud structure.
Further, in a preferred mode of the present invention, the first housing structure and the second housing structure are both plastic housing structures.
Compared with the prior art, the optical fiber connecting and fixing device for the MT interface provided by the invention comprises the following components: a first housing structure; a second housing structure mated with the first housing structure; a first inner structure disposed inside the first outer shell structure; a second inner structure disposed inside the second outer shell structure; groove structures are arranged on the first inner structure and the second inner structure, and the groove structures are used for placing MT interfaces; and the connecting and fastening structure is used for connecting and fastening the first shell structure and the second shell structure. Compared with the prior art, the technical scheme provided by the invention can facilitate MT interface connection and fixation, avoid the problem that the optical fiber is easy to bend and damage, protect short-distance optical fiber interconnection in a case, and facilitate application and development of chip-level optical interconnection.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an MT interface optical fiber connection and fixing device according to an embodiment of the present invention;
fig. 2 is an internal schematic view of an MT interface fiber optic connection and fixation device according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an MT interface fiber according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of the theory of fiber core alignment in an MT interface with two butt joints by inserting a guiding needle according to an embodiment of the present invention;
fig. 5 and fig. 6 are schematic installation diagrams of two MT interfaces using an MT interface optical fiber connection and fixing device according to an embodiment of the present invention;
fig. 7 is a schematic diagram of the MT interface optical fiber connecting and fixing device according to an embodiment of the present invention fixed to a PCB;
fig. 8 is an enlarged schematic view of a pressing structure portion according to an embodiment of the present invention.
Reference numerals: a first housing structure 1; a second housing structure 2; a first inner structure 3; a second inner structure 4; an MT interface 5; a buckle structure 6; a see-through window structure 7; a groove structure 8; a hinge shaft 9; an introducer needle 10; a fixed structure 11; the compacting structure 12.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to the protection scope of the present application.
It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or be indirectly disposed on the other element; when an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "first," "second," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "plurality" or "a plurality" means two or more unless specifically limited otherwise.
It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used for limiting the conditions that the present application can be implemented, so that the present application has no technical significance, and any structural modification, ratio relationship change or size adjustment should still fall within the scope of the disclosure of the present application without affecting the efficacy and the achievable purpose of the present application.
As shown in fig. 1 to 4 and fig. 8, an MT interface optical fiber connecting and fixing device provided in the embodiment of the present application includes: a first housing structure 1; a second housing structure 2 cooperating with said first housing structure 1; a first inner structure 3 arranged inside the first outer shell structure 1; a second inner structure 4 provided inside the second outer shell structure 2; the first inner structure 3 and the second inner structure 4 are both provided with groove structures 5, and the groove structures are used for placing MT interfaces 5; and the connecting and fastening structure is used for connecting and fastening the first shell structure 1 and the second shell structure 2.
The invention provides an MT interface optical fiber connecting and fixing device, which specifically comprises: a first housing structure 1; a second housing structure 2 cooperating with said first housing structure 1; a first inner structure 3 arranged inside the first outer shell structure 1; a second inner structure 4 provided inside the second outer shell structure 2; the first inner structure 3 and the second inner structure 4 are both provided with groove structures 5, and the groove structures are used for placing MT interfaces 5; and the connecting and fastening structure is used for connecting and fastening the first shell structure 1 and the second shell structure 2. Compared with the prior art, the technical scheme provided by the invention can facilitate MT interface connection and fixation, avoid the problem that the optical fiber is easy to bend and damage, protect short-distance optical fiber interconnection in a case, and facilitate application and development of chip-level optical interconnection.
The technical scheme of the invention is specifically explained by combining the specific embodiment as follows:
specifically, in an embodiment of the present invention, the connection fastening structure includes: the buckle structure 6 is arranged on the first shell structure 1; the bayonet structure is arranged on the second shell; the bayonet structure is connected with the buckle structure in a matched mode.
Specifically, in the embodiment of the present invention, the number of the fastening structures 6 is specifically 4, and the fastening structures are distributed on the first housing structure 1; the number of the bayonet structures is four, and the bayonet structures are distributed on the second shell.
In addition, the number of the snap structures 6 in the embodiment of the present invention may be 2, and the specific arrangement structure is shown in fig. 5.
More specifically, the first inner structure 3 and the second inner structure 4 are both inner structures made of rubber.
Specifically, in an embodiment of the present invention, the connection fastening structure includes:
a hinge shaft 9 connecting the first housing structure 1 and the second housing interface;
the buckle structure 6 is arranged on the first shell structure 1 and is opposite to the hinged rotating shaft 9;
and the bayonet structure is arranged on the second shell structure 2 and is opposite to the hinged rotating shaft 9.
Specifically, in an embodiment of the present invention, the method further includes: and the compressing structure 12 is arranged on the first inner structure 3 and/or the second inner structure 4 and is used for pressing the MT interface 5 and the guide needle 10 in an abutting mode, and the compressing structure 12 is arranged close to one side of the hinged rotating shaft 9.
The first inner structure 3 and/or the second inner structure 4 are/is provided with inner side cavities, and the inner side cavities cover the edge of the MT port 5 close to the hinged rotating shaft 9 and the edge of the guiding needle 10 close to the hinged rotating shaft 9. The compressing structure 12 is an elastic extrusion piece, one end of the compressing structure 12 is connected with the inner side cavity, and the local part of the compressing structure 12 is abutted against the side wall of the inner side cavity.
More specifically, the compacting structure 12 is integral with the second inner structure 4; after the MT interface 5 is put in and the cover is closed, the compressing structure 12 protrudes towards the inner cavity to reduce the rubber material, and has the technical effects of making the interface connection more compact and the shell closing easier.
Specifically, in an embodiment of the present invention, the method further includes: a see-through window structure 7 provided on the first housing structure 1 and/or the second housing structure 2.
Specifically, in an embodiment of the present invention, the method further includes: the through hole structure is arranged on the first inner structure 3 and corresponds to the perspective window structure 7; and a groove structure 8 arranged on the second inner structure 4.
Specifically, in an embodiment of the present invention, the method further includes: and the fixing structure 11 is arranged on the first shell structure 1 and/or the second shell structure 2 and is used for being fixedly connected to a PCB or a chassis.
Specifically, in the embodiment of the present invention, the fixing structure 11 is a stud structure.
Specifically, in the embodiment of the present invention, the first housing structure 1 and the second housing structure 2 are both plastic housing structures.
More specifically, in an embodiment of the present invention, the method further includes: and the anti-drop protective frame structure is used for fastening the first shell structure 1 and the second shell structure 2.
More specifically, in an embodiment of the present invention, the method further includes: a dust-proof rotary cover for covering the through-hole structure 8.
More specifically, in an embodiment of the present invention, the method further includes: locate the inboard elasticity extrusion piece structure of 3 insides of first interior structures and the inboard 4 insides of second interior structures, the antiskid line structure is located to the outside of elasticity extrusion piece structure.
More specifically, in the embodiment of the present invention, the first inner structure 3 and the second inner structure 4 are provided with the hole structures, so that the production cost of the product can be saved under the condition that the use condition is met.
More specifically, the embodiment of the invention relates to an MT interface optical fiber connecting and fixing device, which aims to solve the problems that MT interface optical fibers are directly interconnected and cannot be fixed and the optical fibers are easy to damage in chip-level optical interconnection application; in addition, the optical fiber connecting and fixing device of the MT interface, which is related to the embodiment of the invention, can be arranged on a PCB or a chassis, so that the MT interface connection position is fixed, the optical fiber is protected, and the application and the development of chip-level optical interconnection are facilitated.
Fig. 3 to 7 are schematic diagrams of installation processes according to embodiments of the present invention, where fig. 5 and 6 use an inventive apparatus according to an embodiment of the present invention, in this embodiment, the optical fiber connection and fixing apparatus for MT interfaces is composed of a plastic housing, a rubber inner, a buckle, and a fixing structure, a groove portion is cut in the rubber according to the form of two MT interfaces, the rubber itself has a certain stress, which can make connection of the two MT interfaces convenient and reliable, and especially the rubber at the fiber outlet portion can protect the pigtail and avoid damage to the optical fiber due to excessive bending.
The inner grooves of the rubber at the upper side and the lower side of the device are consistent, one side of the device is provided with 4 bayonets, the other side of the device is provided with 4 buckles, the device can be used repeatedly, and the device can also be designed into a mode that a fixing shaft is arranged at one side of a shell and a buckle is arranged at the other side of the shell. The fixing structure of the device can be in a stud form, and is conveniently fixed on a PCB or a case.
Only one device is described here in its form, but in an environment where large-scale use of the device is required, the device can also be designed in a side-mounted form, which can fix the connections of multiple MT interfaces in a small space.
The specific installation steps are as follows:
1. butting the optical fibers of the two MT interfaces 5;
2. inserting a guide needle 10 to ensure that the fiber cores in the two butt-jointed MT interfaces 5 are aligned;
3. putting the two MT interfaces 5 connected in the step 2 into the device;
4. fastening the cover;
5. fixed to the PCB or chassis.
In addition, the MT interface optical fiber connecting and fixing device provided by the embodiment of the invention can be further improved into a mode that the upper cover and the lower cover of the plastic shell are connected in a hinged and buckled mode, so that the MT interface optical fiber connecting and fixing device is more convenient to close and is prevented from being lost.
In addition, the compression structure 12 is additionally arranged on one side of the rubber inner lining close to the hinged part of the shell, so that rubber materials can be reduced, the interface connection is tighter, and the shell is easier to close.
Furthermore, the MT interface optical fiber connecting and fixing device according to the embodiment of the present invention further includes a transparent window structure 7, and a through hole is provided at a corresponding position in the rubber, which facilitates observation of the interface connection state.
In the description provided herein, numerous specific details are set forth, however, it will be understood that embodiments of the invention may be practiced without these specific details, and in some instances, well-known methods, structures, and techniques have not been shown in detail in order not to obscure the understanding of this description; similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects; however, the disclosed method should not be interpreted as reflecting an intention that: rather, the invention as claimed requires more features than are expressly recited in each claim.
Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components of the embodiments may be combined into one module or unit or component, and furthermore they may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the invention and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An MT interface fiber optic connection and securement device, comprising:
a first housing structure;
a second housing structure mated with the first housing structure;
a first inner structure disposed inside the first outer shell structure;
a second inner structure disposed inside the second outer shell structure;
the first inner structure and the second inner structure are respectively provided with a groove structure, and the groove structures are used for placing MT interfaces;
and the connecting and fastening structure is used for connecting and fastening the first shell structure and the second shell structure.
2. The MT interface fiber optic connection and fixation device of claim 1, wherein said connection securing structure comprises: the buckle structure is arranged on the first shell structure; the bayonet structure is arranged on the second shell; the bayonet structure is matched and connected with the buckle structure.
3. The MT interface fiber optic connection and holding device of claim 2, wherein said latching structures are specifically 4, distributed on said first housing structure; the bayonet structures are four in number and are distributed on the second shell.
4. The MT interface fiber optic connection and fixation device of claim 1, wherein said connection securing structure comprises:
a hinge shaft connecting the first housing structure and the second housing interface;
the buckle structure is arranged on the first shell structure and is arranged on one side opposite to the hinged rotating shaft;
and the bayonet structure is arranged on the second shell structure and on the opposite side of the hinged rotating shaft.
5. The MT interface fiber optic connection and securing device of any of claims 1 to 4, further comprising: the compressing structure is arranged on the first inner structure and/or the second inner structure and used for pressing the MT interface in a propping mode, and the compressing structure is arranged close to one side of the hinged rotating shaft.
6. The MT interface fiber optic connection and securement device of claim 5, further comprising: and the perspective window structure is arranged on the first shell structure and/or the second shell structure.
7. The MT interface fiber optic connection and securement device of claim 6, further comprising: the through hole structure is arranged on the first inner structure, and the groove structure is arranged on the second inner structure.
8. The MT interface fiber optic connection and securement device of claim 7, further comprising: and the fixing structure is arranged on the first shell structure and/or the second shell structure and is used for being fixedly connected to a PCB or a case.
9. The MT interface fiber optic connection and securement device of claim 8, wherein said securement structure is a stud structure.
10. The MT interface fiber optic connection and securement device of claim 9, wherein said first housing structure and said second housing structure are each plastic housing structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210875603.0A CN115291337A (en) | 2022-07-25 | 2022-07-25 | MT interface optical fiber connecting and fixing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210875603.0A CN115291337A (en) | 2022-07-25 | 2022-07-25 | MT interface optical fiber connecting and fixing device |
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| Publication Number | Publication Date |
|---|---|
| CN115291337A true CN115291337A (en) | 2022-11-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210875603.0A Pending CN115291337A (en) | 2022-07-25 | 2022-07-25 | MT interface optical fiber connecting and fixing device |
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| CN (1) | CN115291337A (en) |
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| CN216748221U (en) * | 2022-01-27 | 2022-06-14 | 浙江热刺激光技术有限公司 | Optical fiber device with variable output laser energy distribution |
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| US20230204888A1 (en) * | 2020-05-06 | 2023-06-29 | Commscope Technologies Llc | Splice enclosure with connectorized patching functionality |
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