JPH0463495A - Waterproof cap for transceiver - Google Patents

Abstract

PURPOSE:To eliminate invasion of water into a nose upon strong washing and to obviate a decrease in optical input/output by branching an elastic insertion unit to be engaged within a front chamber of a transceiver to a forked state, and forming holes for noses at the branched parts. CONSTITUTION:An elastic insertion unit 11 to be inserted into the opening of a front chamber 3 of a casing is branched to a forked state, and holes 14a, 14b for noses are formed at the branched parts 11a, 11b. Accordingly, even if the holes 14a, 14b are not severely coincident in size with the noses 5, 6, an error is absorbed by the elastic deformations of the parts 11a, 11b themselves to be branched in the forked state, and the engaging states of the noses 5, 6 with the holes 14a, 14b are improved. Deterioration of close contact engaging state based on the difference of thermal expansion coefficients of the noses 5, 6 and the holes 14a, 14b are eliminated by the elastic deformations of the parts 11a, 11b. Further, the outer periphery of the root side of the unit 11 is formed at a close contact sealer 15 in close contact with the inner periphery of the opening of the chamber 3. Thus, in the case of washing, invasion of water into the noses and a decrease in optical input/output are eliminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a waterproof cap for plugging an opening of a transceiver that emits and receives optical signals between computers.

[Conventional technology]

In recent years, computers have been used in large numbers in various technical fields, and the frequency of communication between computers has increased. Recently, such communication between computers has come to be performed by optical communication. In other words, electrical signals are used within computers, but communication with other computers is
The electrical signal is converted into an optical signal and output. Furthermore, optical signals from other computers are input by converting the optical signals into electrical signals.

A transceiver is a converting element between such an electrical signal and an optical signal, and is attached to the input/output section of each computer.

As shown in FIG. 6, this type of transceiver divides the inside of a square cylindrical casing 1 made of hard plastic into a front chamber 3 and a rear chamber 4 by a central partition wall 2, and transmits electrical signals into the rear chamber 4. A semiconductor element (not shown) having a function of converting optical signals is housed therein, and a lid (not shown) on the surface is closed and sealed. This semiconductor element has insertion pins (not shown) protruding from the back surface of the transceiver, and is connected to a computer by inserting the pins. As shown in FIG. 7, a cylindrical light emitting element nose portion 5 for converting an electrical signal into an optical signal and outputting the converted signal is protruded from a portion of the central partition wall 2 on the side of the front chamber 3. At the same time, a cylindrical light-receiving element nose portion 6 is provided in a protruding manner for converting optical signals into electrical signals and inputting the same. And, on the root side of both nose parts 5 and 6,
Grooves 5a and 6a are formed respectively. In addition, the 6th
In the figure, 8 is a pin for attaching a transceiver, and 9 is a window for latching with a connector plug. Reference numeral 16 designates inner lead pins for exchanging electrical signals with the computer internal board, and the connection between the computer groove plate and the transceiver is achieved by soldering this lead pin 16 and the mounting pin 8 to the board. During soldering, flux is generally used to improve wettability, but residual flux has a negative effect on electronic components, so they are usually cleaned with Freon or water.

[Problem to be solved by the invention]

However, during this cleaning, the transceiver cannot be used for cleaning as is because fluorocarbons and water containing flux enter and remain in the nose section, causing a problem of reducing optical input and output.

Therefore, as shown in FIG. 6, the inventors came up with the idea of sealing the entrance of the front chamber 3 of the transceiver by inserting an insertion part 11 of a waterproof cap 10 made of hard rubber. 12 is an operating section, 13 is a non-slip section, and 14 is a nose hole for accommodating the nose section 5.6. However, this waterproof cap 10 is made of hard rubber, and its dimensions vary slightly due to differences in shrinkage of the rubber material. Therefore, slight variations occur in the formation value Hp of the nose hole 14, and due to this variation, the state of close fitting between the nose hole 14 and the nose portions 5, 6 varies, and the waterproof cap 10 and the casing 1. Since the material of the nose part 5.6 is different and the coefficient of thermal expansion is also different, the nose hole 14 is different when the material expands or contracts.
The adhesion between the nose parts 5 and 6 deteriorates, and water enters into the cylindrical nose part 6 through the space between the nose hole 14 and the nose parts 5 and 6 during the washing process, staining the inside of the nose part and preventing light from entering. The problem arose of reducing input/output.

This invention was made in view of the above circumstances, and when removing flux by washing the transceiver with water, etc.,
The purpose of the present invention is to provide a waterproof cap for a transceiver that does not cause a decrease in optical input and output due to the intrusion of dirty water into the nose part.

[Means to solve the problem]

In order to achieve the above object, the transceiver waterproof cap of the present invention has a central corner wall that divides the inside of the cylindrical casing into a front chamber and a rear chamber, the rear chamber is formed as a sealed chamber for accommodating semiconductor elements, and the front chamber side is divided into a front chamber and a rear chamber. A waterproof cap for plugging the front chamber opening of a transceiver in which a light-emitting element nose part and a light-receiving element nose part are formed in the partition wall of the transceiver, the cap comprising an elastic insertion part to be inserted into the front chamber, and an elastic insertion part provided at the rear end. the insertion part is bifurcated along the insertion direction, and one branch is formed with a first nose hole that tightly fits the outer periphery of the light emitting element nose part. At the same time, a second nose hole is formed in the other branch part to tightly fit the outer periphery of the light receiving element nose part, and a tight seal whose outer periphery on the root side of the insertion part tightly contacts the inner wall surface of the opening of the front chamber. It has a structure in which it is formed in the section.

C action] That is, the waterproof cap for transceiver of this invention has the following effects:
The elastic insertion part that is inserted into the front chamber opening of the casing is bifurcated, and each branch has a nose hole, so the dimensions of the nose hole and the nose part do not exactly match. However, the elastic deformation of the bifurcated bifurcated portion itself absorbs the error and improves the close fitting between the nose portion and the nose hole. Further, deterioration in the close fitting state between the nose portion and the nose hole due to the difference in coefficient of thermal expansion between the nose portion and the nose hole is also eliminated by the elastic deformation of the branch portion. Furthermore, since the outer periphery of the base side of the insertion part is formed into a tight seal that tightly contacts the inner periphery of the opening of the front chamber, even if pressure is applied during the above-mentioned washing,
The tight seal portion temporarily prevents water from entering. Therefore, water will not enter the nose portion during washing.

Next, examples will be described.

〔Example〕

1 to 3 show one embodiment of the present invention. That is, in the transceiver waterproof cap 10a of this embodiment, a rectangular plate-shaped elastic insertion part 11 to be inserted into the front chamber 3 of the transceiver is bifurcated, and one branch part 11a has a light emitting element nose part 5 attached thereto. A first nose hole 14a that tightly fits on the outer periphery is formed, and a 20th nose hole 14b that tightly fits into the light receiving element nose portion 6 is formed on the other branch portion 11b. Then, the outer circumferential surface of the base side of the insertion portion 11 is in close contact with the inner wall surface of the opening of the front chamber 3, as shown by the mesh in FIGS. 1 and 2.
5. And both nose holes 14a
, 14b, a plurality of circumferential cut grooves 18 are formed at predetermined intervals along the longitudinal direction of the hole, and the portion of the inner wall surface between the grooves 18 is, so to speak, O
The ring functions to firmly adhere to the outer periphery of the nose portions 5 and 6 and prevent them from coming off.

As a result of this configuration, when the insertion part 11 of the waterproof cap 10a is inserted under pressure into the front chamber 3 of the transceiver in the state shown in FIG. firmly adheres to. and,
Projections 11c and 11d at the tip of each branch 11a and 11b
However, the groove 5a on the outer periphery of the root of the nose portion 5.6 shown in FIG.
, 6a, and position the tips of each branch portion 11a, llb at an appropriate position. When inserting the insertion part 11, even if there is a dimensional error between the nose holes 14a, 14b and the nose parts 5, 6, the error is absorbed by the elastic deformation of each branch part 11a, 11b, and the nose Holes 14a, 14b
Coupled with the action of the plurality of cut grooves 18 formed on the inner wall surface, strong waterproofing is achieved. Then, the tight seal portion 15 at the base of the insertion portion 11 is in close contact with the inner wall surface of the entrance of the front chamber 3,
This part prevents water from entering. As described above, the transceiver waterproof cap 10a of this embodiment has a two-stage structure for waterproofing, first, the primary waterproofing is performed at the close seal portion 15 on the base side, and then the nose hole 14a,
14b and the nose portions 5 and 6 are closely fitted to provide secondary waterproofing. Therefore, even if the transceiver is washed with a strong stream of water, water will not enter the nose of the transceiver, and the transceiver can be attached to the computer using the attachment bin 8.

4 and 5 show other embodiments. In this embodiment, the branch portion 11a of the insertion portion 11 is shown.

A notch 17 that reaches the nose holes 14a and 14b is formed along the longitudinal direction on opposing surfaces of the nose portion 11b. The other parts are the same as those in the previous embodiment. In this way, the difference in diameter between the nose hole 14a14b and the nose portion 5.6 can also be absorbed by the cut 17.

〔Effect of the invention〕

As described above, in the waterproof cap for a transceiver of the present invention, the elastic insertion part that is fitted into the front chamber of the transceiver is branched into two parts, and each branch part is formed with a nose hole. Even if the distance between the light-emitting element nose section and the light-receiving element nose section provided in the section is slightly different from the distance between the first and second nose holes formed in each branch section, each branch section remains elastic. It deforms and absorbs the deviation. Therefore, the work of inserting the waterproof cap becomes easier, and at the same time, the nose hole is tightly fitted to the outer periphery of the nose portion, and a good watertight state is maintained. Further, since the outer periphery of the base side of the insertion portion is formed as a tight seal portion that tightly contacts the inner wall surface of the front chamber opening of the transceiver, this portion is primarily waterproof. The water that has passed through this area is then subjected to secondary waterproofing due to the tight fit between the nose hole and the nose portion. Therefore, even if strong water washing is performed, water will not enter the nose portion and cause a decrease in optical input and output. Further, the waterproof cap of the present invention can be used as an entrance cover when storing a transceiver, and has the effect of preventing dust from entering during storage.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the usage state of one embodiment of this invention, and FIG.
The figure is a plan view, Figure 3 is a perspective view of the exterior, and Figure 4 is a perspective view of the same.
5 and 5 are perspective views of other embodiments, FIG. 6 is an explanatory view of the use of the waterproof cap which is the basis of the present invention, and FIG. 7 is a sectional view taken along the line AA' in FIG. 6. 11... Elastic insertion part 11a, llb... Branch part 1
4a, 24b...Nose hole 15...Tight sealing part Patent applicant: Tokai Rubber Industries, Ltd. Sumitomo Electric Industries, Ltd. Agent: Patent attorney Yukihiko Nishifuji 1112 Figure 4 Figure 5

Claims (2)

[Claims] (1) The interior of the cylindrical casing is divided into a front chamber and a rear chamber by the central partition, and the rear chamber is formed as a sealed chamber for accommodating semiconductor elements;
A waterproof cap for plugging the front chamber opening of a transceiver in which a light emitting element nose part and a light receiving element nose part are formed in the partition wall on the front chamber side. and an operating section provided therein, the insertion section is bifurcated along the insertion direction, and one branch is formed with a first nose hole that tightly fits on the outer periphery of the light emitting element nose section. At the same time, a second nose hole is formed in the other branch part to tightly fit the outer periphery of the light receiving element nose part, and the outer periphery of the base side of the insertion part is in close contact with the inner wall surface of the opening of the front chamber. A waterproof cap for a transceiver characterized by being formed on a tight seal part. (2) The transceiver according to claim (1), wherein a plurality of cut grooves are formed on the inner wall surfaces of the first and second nose holes along the circumferential direction and at predetermined intervals in the longitudinal direction of the holes. waterproof cap.