JP2002110304A - Socket for decorative light bulb - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a socket for a decorative light bulb which can prevent lighting faults caused by infiltration of water. SOLUTION: Once an insertion operation of an upper member 4 into a lower member 2 is finished, a horizontal face 53 formed on a brim part 43 of the upper member 4 comes in close contact with a stepped part 25 of the lower member 2 and a tapered perpendicular face 54 comes in close contact with a likewise tapered erected face 26, and at the same time, a protruding edge 27 of the lower member 2 is accepted in close contact into a concave downward opening part formed at the brim part of the upper member 4. Therefore, the protruding edge 27 of the lower member 2 has its outer and inner periphery faces in close contact with the concave part 55, to make up a double waterproof structure. Thus, infiltration of water into the interior through both members can surely be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a decorative light bulb socket used as an illumination by connecting a plurality of lamps.

[0002]

2. Description of the Related Art FIGS. 11 and 12 show a conventional socket for a decorative bulb. The decorative bulb socket 100 is made of synthetic resin, and includes a lower member 200 and an upper member 300 fitted and arranged on the upper portion of the lower member 200 as shown in FIG. The lower member 200 is cylindrical and has a cylindrical section 20 having a circular cross section at the upper end.
And a rectangular tube section 2 having a rectangular cross section
02 is formed. A pair of terminal plates 203, 203 are disposed on the inner peripheral portions of the rectangular tube portion 202 facing each other.
4 are connected.

On the other hand, the upper member 300 is also cylindrical,
As shown in FIGS. 1 and 12, a cylindrical portion 301 and a prism portion 302 to be fitted in the cylindrical portion 201 and the cylindrical portion 202 are integrally formed, and a flange 303 is formed at an upper end of the cylindrical portion 301. Have been. A concave portion 304 into which the lower portion of the electric bulb 400 is fitted is formed in the cylindrical portion 301, and a pair of lead wires 401 extending from the lower end portion of the electric lamp 400 are inserted into the rectangular column portion 302. 3
05 and 305 are provided. Further, the prism 302
Are formed at both corners at the lower end, and a guide groove 307 is formed in the chamfered portion 306.

In such a configuration, upon manufacture, the electric bulb 400 is fitted into the concave portion 404 of the upper member 300, and the lead wires 401, 401 are projected downward from the through holes 305, 305. Next, the protruding portions of the lead wires 401, 401 are bent laterally while being accommodated in the guide grooves 307, 307,
As shown in FIG. 11, it is located on the side surface of the prism 302.

After that, the lower end of the upper member 300 on which the light bulb 400 is mounted is inserted from the upper end of the lower member 200 into the inside. As a result, the cylindrical portion 301 is
01 and the prism portion 302 is
Fits. Further, by fitting the prism portion 302 into the prism portion 202, the lead wires 401, 401 come into contact with the terminal plates 203, 203 to be in a conductive state.
The decorative light is completed.

[0006] At this time, since the lead wires 401, 401 are accommodated and restrained in the guide grooves 307, 307, when inserting the upper member 300 into the lower member 200, the lead wires 401, 401 are in the middle of insertion. Is in contact with the inner wall of the lower member 200, the lead wires 401, 401 are not displaced due to the frictional resistance between the two, and the terminal plate 2
03, 203 and lead wires 401, 401 can be prevented from being poorly contacted.

[0007]

By the way, in many cases, a decorative lamp using such a decorative bulb socket 100 is used as an illumination in which a plurality of lamps are arranged in series and arranged on an outdoor tree. In addition, waterproofness against raindrops is required. However, in the above-described conventional decorative light bulb socket 100, although the flange 303 is formed at the upper end of the upper member 300, the lower surface of the flange 303 in the assembled state is the same as that of the cylindrical portion 201 of the lower member 200. It only makes linear contact with the upper edge. For this reason, water easily penetrates into the inside of the lower member 200 due to the capillary phenomenon from between the lower surface of the flange 303 and the upper edge of the cylindrical portion 201, and short-circuits the two terminal plates 203, 203. It was feared that this would occur.

The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a decorative light bulb socket that can prevent lighting failure due to intrusion of water. .

[0009]

In order to solve the above-mentioned problems, the present invention comprises a lower member and an upper member which fits inside the lower member, and the lower member has a cylindrical shape. A pair of terminal plates facing each other is disposed on the inner peripheral portion, and a fitting portion for fitting the lower member is formed on the upper member while the bulb is supported at the upper end. A pair of through-holes are formed in the lower end surface of the portion, and a pair of lead wires extending from the bulb are protruded downward from the through-hole to be folded and positioned on the corresponding both side surfaces of the fitting portion. And, with the fitting of the upper member and the lower member, in the decorative light bulb socket for contacting the lead wire located on both side surfaces of the fitting portion to the terminal plate, the upper member, Covering the upper edge of the lower member with the fitting, forming a flange close to the outer peripheral surface thereof That.

Therefore, when the upper member is fitted to the lower member, the flange of the upper member covers the upper edge of the lower member and comes into close contact with the outer peripheral surface of the upper edge. Therefore, the upper edge of the lower member is in close contact with the flange of the upper member on the outer peripheral surface thereof, so that waterproofness is ensured, and intrusion of water from between the two members to the inside is prevented. Therefore, it is possible to prevent the inconvenience of intrusion of water into the inside and short-circuiting of both terminal boards, thereby causing lighting failure.

Further, according to the present invention, the flange portion has a downwardly open concave portion for receiving an upper edge portion of the lower member with the fitting. Therefore, when the upper edge of the lower member is received in the recess, the upper edge of the lower member is in close contact with the recess on the outer peripheral surface and the inner peripheral surface, and a double waterproof structure is formed. Therefore, intrusion of water into the inside from between the two members is more reliably prevented.

The upper edge of the lower member has a tapered standing wall, and the flange has a tapered hanging wall closely contacting the outer peripheral surface of the standing wall. Therefore, since the rising wall of the lower member and the hanging wall of the upper member are tapered, they can be brought into close contact smoothly, and a recess is formed in the flange of the upper member, and The work of receiving the edge is facilitated.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the decorative bulb socket 1 according to the present embodiment is made of a synthetic resin, and includes a lower member 2 and an upper member 4 which is fitted inside the lower member 2 so as to be fitted therein.
It is composed of

The lower member 2 is cylindrical and has a non-cylindrical portion 21 and a cylindrical portion 22 at its inner peripheral portion as shown in FIGS.
Are connected to each other via a shelf 23. Non-cylindrical part 21
As shown in FIG. 3, opposing surfaces are flat, and the cylindrical portion 22 is circular in cross section. 4A, on both sides of the shelf 23, there are provided terminal plate arrangement portions 24, 24 which enter the non-cylindrical portion 21 side.
As shown in FIG. 3, the terminal plate arrangement portions 24, 24 have an inwardly curved shape. Further, as shown in FIGS. 2 and 4, the upper edge of the lower member 2 has a horizontal step 25.
And a tapered upright surface 26 connected to the base of the step portion 25 and having a reduced diameter on the upper side. This allows
A protruding edge 27 having a tapered upright surface 26 on the outer peripheral portion is formed on the step portion 25.

As shown in FIGS. 5 to 7, the upper member 4 includes a fitting portion 41, a leg portion 42 extending at a lower end of the fitting portion 41, and a flange portion formed at an upper portion. 43 integrally. The fitting portion 41 is cylindrical, and the lower member 2
And a cylindrical section 44 which can be fitted inside the non-cylindrical section 21 and has a rectangular cross section, and a cylindrical section 45 which can be fitted inside the cylindrical section 22 and has a circular section.

The leg 42 is provided at the lower end surface 46 of the prism 44.
It protrudes downward from the central part. The lower end surface 46 of the prism 44 is provided with a through hole 4 on both sides of the leg 42.
7, 47 are formed. As shown in FIG. 6, the through hole 47 has a substantially triangular shape approximating a fan shape,
The apex 48 corresponds to the corresponding side surface 4 of the prism portion 44.
It is formed in the direction toward 9, 49.

The side surfaces 49, 49 of the prism 44 are provided with a pair of holding ribs 50, 50, respectively.
The pair of holding ribs 50 have a width capable of holding a lead wire 61 extending under the bulb 6 shown in FIG. 1 therebetween. Also, the holding ribs 50, 50
Is provided at the upper end of the side surface 49 and is connected to the column 45.

As shown in FIG. 7, a concave portion 51 for supporting the lower portion of the bulb 6 is formed in the cylindrical portion 45 of the upper member 4, and the flange portion 43 is formed in the outer peripheral portion of the upper end. Have been. A horizontal surface 53 that can be in close contact with the step portion 25 of the lower member 2, a tapered hanging surface 54 that is continuous with the horizontal surface 53 and can be in close contact with the surface of the tapered upright surface 26, And this hanging surface 54,
A downwardly open concave portion 5 capable of receiving the protruding edge 27 in close contact therewith.
5 are provided.

On the other hand, the terminal plate arrangement portion 24 of the lower member 2
As shown in FIG. 8, the terminal plate 7 disposed in the unit 24 integrally has an upper terminal main body 71, a middle wire crimping portion 72, and a lower covered wire crimping portion 73, and has conductivity. It is formed of metal. The terminal body 71 is shown in FIG.
As shown in (c), similar to the terminal plate arrangement part 24,
The conductive wire crimping portion 72 and the covered wire crimping portion 73 are straight shapes.

When the terminal plate 7 is manufactured in the present embodiment having the above-described structure, as shown in FIG. The terminal wire 7 is connected to the cord 8 by bending and crimping the wire crimping portion 72 to 82. Next, a pair of cords 8 whose terminal portions are connected to the terminal plate 7 are attached to the cords 8.
1 into the lower member 2 through the cylindrical portion 22 of the lower member 2.
As shown at 0, the cord 8 is made to protrude from the lower part of the lower member 2 to the outside, and the terminal main body 71 is positioned at the terminal plate disposition portion 24.

On the other hand, a light bulb 6 is
1 and inserted into the recess 51, and the lower part of the bulb 6 is
To fit. Then, the pair of lead wires 61, 61
Each of the through holes 47 protrudes downward from the corresponding through hole 47. Next, the lead wires 61, 61 projecting downward from the through holes 47, 47 are folded back in the directions of both side surfaces 49 of the prism 44. Then, the lead wire 61 is guided by the polygonal through hole 47 and positioned within the vertex 48. Therefore, the lead wire 61 is positioned by the vertex 48, extends on both side surfaces 49 of the prism 44, and
Can be accurately extended on both side surfaces 49 of the prism 44 while positioning.

When the bending operation of the lead wire 61 is completed, the upper end of the lead wire 61 is further press-fitted between the holding ribs 50, 50. This allows
The portion of the lead wire 61 extending on both side surfaces 49 of the prism portion 44 has its lower end positioned within the vertex 48 of the through hole and its upper end positioned by the holding ribs 50, 50. Is located along the center on both side surfaces 49.

Thereafter, the lower member 2 of the prism 44 is inserted into the lower member 2 from the cylindrical portion 22 of the lower member 2 from the side of the leg 42 with the upper member 4 to which the light bulb 6 is mounted and the lead wire 61 is positioned. Then, the leg is interposed between the two cords 8, and the lead wires 61, 61 are respectively connected to the terminal plate and the terminal body 71.
To be in a conductive state. At this time, as described above, the portion of the lead wire 61 extending on both side surfaces 49 of the prism portion 44 has its lower end positioned within the vertex 48 of the through hole and its upper end fixed by the holding ribs 50, 50. Since the lead wires 61 are positioned, the lead wires 61 can be brought into contact with the terminal main body 71 with high precision without displacement.

Here, the lower end surface 4 of the prism portion 44 of the upper member 4
6 has a configuration in which only a substantially triangular through-hole is formed, that is, a configuration in which only a single element is formed in the lower end surface 46. Therefore, there is no difficulty in molding technology using a synthetic resin. Molding can be easily performed without any need. Therefore, the through hole 47 can be molded with high precision, and as a result, it is possible to reliably prevent the displacement of the lead wire 61 while facilitating the molding technique.

Further, as described above, since the terminal main body 71 of the terminal plate 7 has an inwardly curved shape, even if the chamfered portions 306, 306 (see FIG. 11) are not formed as in the prior art, Thus, the upper member 4 can be smoothly inserted into the lower member 2. Further, as described above, the upper member 4
Can be smoothly inserted into the lower member 2, so that the displacement of the lead wire 61 can be prevented.

When the operation of inserting the upper member 4 into the lower member 2 is completed, the flange 25 of the upper member 4 is attached to the step 25 of the lower member 2.
3, the vertical surface 54 is in close contact with the tapered upright surface 26, and the protruding edge 27 of the lower member 2 is formed in the flange 43 of the upper member 4. It is closely received in the concave part 55 of the shape. Therefore, with the fitting, the protruding edge 27 of the lower member 2 is in close contact with the concave portion 55 on the outer peripheral surface and the inner peripheral surface to form a double waterproof structure. Therefore, it is possible to reliably prevent water from entering between both members. For this reason, the decorative bulb socket 1
Even when is used outdoors, water does not enter the interior from between the upper end of the lower member 2 and the upper member 4 in rainy weather, and lighting failure due to intrusion of water can be prevented. .

Since both the upright surface 26 and the hanging surface 54 are tapered, the upright surface 26 of the lower member 2 is formed.
And the hanging surface 54 of the upper member 4 can be smoothly and closely contacted with each other. A concave portion 55 is formed in the flange 43 of the upper member 4 so that the projecting edge 27 of the lower member 2 can be received therein, thereby facilitating the operation. Can be done.

[0028]

As described above, the present invention comprises a lower member on which a terminal plate is arranged, and an upper member fitted inside the lower member, and is supported by the upper member having a fitting portion. In the decorative light bulb socket, the lead wire is projected downward from the through hole and folded, and is located on the corresponding both side surfaces of the fitting portion, and the lead wire is brought into contact with the terminal plate. When the upper member is fitted to the lower member, the upper edge portion of the lower member is covered with the fitting of the member, and the flange is formed so as to be in close contact with the outer peripheral surface of the lower member. The flange of the upper member covers the upper edge of the lower member and is in close contact with the outer peripheral surface of the upper edge. Therefore, since the upper edge of the lower member is in close contact with the flange of the upper member on the outer peripheral surface thereof, it is possible to ensure waterproofness, and to prevent water from entering between the two members. Can be. Therefore, water penetrates inside,
It is possible to prevent the inconvenience of short-circuiting both terminal boards, thereby causing lighting failure.

Further, since the flange is provided with a downwardly open concave portion for receiving the upper edge portion of the lower member along with the fitting, the upper edge portion of the lower member is received in the concave portion. Thereby, the upper edge portion of the lower member is in close contact with the concave portion on the outer peripheral surface and the inner peripheral surface, so that a double waterproof structure can be formed. Therefore, intrusion of water into the inside from between the two members can be more reliably prevented.

Also, the upper edge of the lower member has a tapered upright wall, and the flange has a tapered hanging wall which is in close contact with the outer peripheral surface of the upright wall. The hanging member of the upper member can be smoothly and closely contacted with each other, and a concave portion is formed in the flange portion of the upper member, so that the upper edge of the lower member can be received therein, thereby facilitating the operation.

[Brief description of the drawings]

FIG. 1 is an exploded front view showing an embodiment of the present invention.

FIG. 2A is a front view of a lower member, and FIG. 2B is a right side view.

FIG. 3 is a plan view of a lower member.

FIG. 4A is a cross-sectional view of the lower member taken along the line 3A-A of FIG. 3, and FIG.
FIG. 2 is a sectional view taken along the line B-B in FIG.

FIG. 5A is a front view of an upper member, and FIG. 5B is a right side view.

6A is a plan view of an upper member, and FIG. 6B is a bottom view.

7A is a cross-sectional view taken along line CC of FIG. 6A, and FIG. 7B is a cross-sectional view taken along line DD of FIG. 5A.

8A is a front view of a terminal plate, FIG. 8B is a right side view,
(C) It is a top view.

FIG. 9 is a front view of a state where a cord is connected to a terminal plate.

FIG. 10 is a vertical sectional view showing a completed state of the embodiment.

FIG. 11 is an exploded partial cross-sectional front view showing a conventional technique.

FIG. 12 is a vertical sectional view of a lower member according to the related art.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Decorative light bulb socket 2 Lower member 4 Upper member 6 Light bulb 7 Terminal plate 21 Non-cylindrical part 22 Cylindrical part 24 Terminal board arrangement part 25 Step part 26 Standing surface 27 Protrusion edge 41 Fitting part 43 Flange part 44 Square pillar part 45 Column part 47 through hole 48 apex 49 side surface 50 clamping rib 52 flange 53 horizontal surface 54 hanging surface 55 concave portion 61 lead wire 71 terminal body 72 conductor crimping part 73 sheathed wire crimping part

Claims (3)

[Claims] 1. A lower member comprising: a lower member; and an upper member which is fitted into the lower member. The lower member has a cylindrical shape, and has a pair of terminal plates opposed to each other on an inner peripheral portion thereof. The member has a fitting portion for fitting the lower member while a light bulb is supported at an upper end portion, and a pair of through holes are formed at a lower end surface of the fitting portion, and the member extends to the bulb. A pair of lead wires that have been folded back by projecting downward from the through hole,
Decoration in which lead wires located on both side surfaces of the fitting portion are located on both side surfaces corresponding to the fitting portion, and the lead wires located on both side surfaces of the fitting portion are brought into contact with the terminal plate as the upper member and the lower member are fitted. In the socket for a light bulb, the upper member is provided with a flange that covers an upper edge of the lower member with the fitting and is in close contact with an outer peripheral surface thereof. 2. The decorative bulb socket according to claim 1, wherein the flange portion has a downwardly open concave portion that receives the upper edge of the lower member in close contact with the fitting. . 3. An upper edge portion of the lower member has a tapered upright wall, and the flange portion has a tapered hanging wall closely contacting an outer peripheral surface of the upright wall. Or the socket for decorative bulbs according to 2.