JP2000315558A - Waterproof socket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a waterproof socket from twisting of its packing. SOLUTION: A waterproof socket is configured so that a cover cylinder 10 surrounding the base of a lamp is screw fitted to the front face of a socket body S whereto the base end of the lamp abuts and a cylindrical packing 7 made of an elastic material arranged around the base of the lamp is accommodated in the cover cylinder 10, wherein the socket body S is equipped on its front face with a rib 1 which allows the packing to surround at the inside surface of the end part.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof socket, and more particularly to a socket whose lamp base is watertight to the outside.

[0002]

2. Description of the Related Art In a socket for fixing a lamp such as a fluorescent tube while sandwiching it between a pair of socket bodies, in order to make the base part watertight to the outside, the front end of the socket body to which the base of the lamp is to be abutted. There is a known socket in which a cover cylindrical body formed of a cylindrical body surrounding the base of the lamp is screwed, and a cylindrical packing made of an elastic material disposed on the circumferential side of the base of the lamp is accommodated in the cover. It is.

FIG. 7 shows an example of this type of socket. In the figure, reference numeral 21 denotes a socket main body, and a receiving plate 22 having a pin hole into which a base of a lamp (not shown) abuts and a lamp pin is inserted is provided on the front. Reference numeral 25 in the figure
Is a cover cylinder formed of a cylinder surrounding the periphery of the base of the lamp, and a screw cylinder 24 projecting from the front of the socket body 21.
The female screw 25A at one end is screwed to the male screw 24A at the outer periphery, so that the female screw 25A is detachably provided to the socket body. Reference numeral 27 in the figure denotes a cylindrical packing made of an elastic material disposed on the periphery of the base of the lamp, and is housed in the cover cylinder 25 described above. The packing 27 is sandwiched between the inner flange-shaped engaging step 26 provided on the inner periphery of the opening of the cover cylinder and the front of the socket body when the cover cylinder 25 is mounted on the socket body 21. The packing end and the engaging step 26 are provided so that the cover cylinder rotates freely with respect to the packing when the cover cylinder is screwed and rotated during mounting.
And a slip ring 28 is interposed.

[0004]

However, at present, the packing 27 is configured to be extremely thin due to a demand for downsizing the socket. Therefore, packing 2
7 is easily elastically deformed even by a small external force, and the portion whose end should originally abut against the front surface of the socket main body when mounted on the socket main body 21 is deformed inward as indicated by the symbol X in FIG. The situation of contact was often caused.
As a result, irregularities are generated on the outer periphery of the packing 27 due to this deformation, and the packing is hung on the cover cylinder when the cover cylinder is screwed and rotated at the time of attachment to the socket body, and is forcibly rotated and twisted. Occurred.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art, and surrounds the base of the lamp at the front side of the socket body to which the base of the lamp is to be abutted. In the socket which accommodates the cylindrical packing made of an elastic material arranged around the base of the lamp inside the cover cylindrical body while screwing the cover cylindrical body made of It is characterized in that a rib surrounding the peripheral surface is provided.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A specific embodiment of the socket of the present invention will be described below with reference to the accompanying drawings. Reference symbol S in the figure is a socket body. In the socket body S, a base plate end of a lamp (not shown) is brought into contact with a front surface, and a receiving plate 2 having pin holes 3, 3 into which lamp pins are inserted protrudes. The contacts to be contacted by the lamp pins are arranged in the pin holes 3, 3, but are not shown because they are not related to the gist of the present invention. Further, in this embodiment, in order to allow the lamp pins to be inserted into the pin holes 3 from the peripheral side of the socket body S, the pin holes are provided in an elongated hole shape with one end opened toward the receiving plate 2 peripheral side. Can be

In the drawing, reference numeral 10 denotes a cover cylinder composed of a cylinder surrounding the base of the lamp. This cover cylinder 10
Is detachably mounted on the socket body by screwing an internal thread 10A on one end to an external thread 4A on the outer circumference of the screw cylinder 4 protruding from the front face of the socket body S. Reference numerals 4B and 4B in the drawing denote lamp holes provided on the cover cylinder 10 for allowing the lamp pins to be inserted into the elongated pin holes 3 and 3 from the peripheral side of the socket body S. Notch.

Reference numeral 7 in the drawing denotes a cylindrical packing made of an elastic material disposed on the peripheral side of the end of the lamp, and is housed in the cover cylinder 10 described above. The packing 7 is sandwiched between an inner flange-shaped engaging step 11 provided on the inner periphery of the opening of the cover cylinder and the front of the socket body when the cover cylinder 10 is mounted on the socket body S. The packing end and the engaging step 11 are arranged so that the cover cylinder rotates freely with respect to the packing when the cover cylinder is screwed and rotated during mounting.
And a slip ring 9 is interposed therebetween.

Reference numeral 1 in the figure denotes a rib constituting a characteristic part of the present invention. The rib is provided so as to surround the inner peripheral surface of the end of the packing 7 along the position where the end of the packing 7 comes into contact with the front of the socket body S (refer to FIGS. 1, 2, and 4 in particular). In this embodiment, an annular rib 1 is illustrated, but the shape of the rib is not limited to this, and may be, for example, a partially arcuate shape.
Also, it goes without saying that the height of the rib is not particularly limited.

[0010]

According to the socket of the present invention having the above-described structure, even if the end of the packing is deformed inwardly when the packing 7 is mounted and is to be brought into contact with the front of the socket, the inner periphery of the front of the socket is formed at the inner periphery. Since the rib 1 is located, the deformation is corrected by the contact with the rib. Therefore, irregular irregularities do not occur on the outer periphery of the packing 7, and the situation in which the packing 7 is rotated and twisted by the cover cylinder 10 as in the related art is eliminated.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a waterproof socket according to the present invention during assembly.

FIG. 2 is a partially cutaway perspective view showing a state in which a cover cylinder is removed.

FIG. 3 is an exploded perspective view of the same.

FIG. 4 is a perspective view schematically showing the relationship between packing and ribs.

FIG. 5 is a front view showing a state where a cover cylinder is removed;

FIG. 6 is a sectional view of a conventional waterproof socket.

[Explanation of symbols]

 S Socket body 1 Rib 7 Packing 10 Cover cylinder

Claims (3)

[Claims] 1. A cover tube comprising a tube surrounding the lamp base is screwed into the front of the socket body to which the lamp base is to be brought into contact, and the lamp base is inserted into the cover tube. A waterproof socket, characterized in that a rib surrounding an inner peripheral surface of an end portion of the packing is provided on a front surface of the socket body in a socket accommodating a cylindrical packing made of an elastic material disposed in the socket. 2. The waterproof socket according to claim 1, wherein the rib provided on the front surface of the socket body is annular. 3. The waterproof socket according to claim 1, wherein the rib provided on the front surface of the socket body has an arc shape.