JPS59101785A - Illuminator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a lighting device that prevents rainwater from entering between a light bulb base and a socket.

Conventionally, the base of the light bulb is screwed into the socket to connect the two, but the threaded surfaces of the base and the socket are formed by bending metal plates, so accuracy is rarely an issue. Therefore, a gap inevitably occurs between the threaded surfaces.

When used outdoors, such as in external lighting, rainwater often enters through the gap between the socket and the base, causing electrical leakage. Particularly in the case of decorative lights, they are equipped with highly sensitive earth leakage detectors, which would activate every time it rained and cut off the power, causing constant trouble. To solve this problem, increase the precision of the fit between the cap and the socket.
It would be better to increase the precision to such an extent that rainwater cannot enter the gaps, but it is impossible to perform metal bending for mass-produced caps and sockets with such high precision as shown on the left.

Conventionally, a heat-resistant rubber backing was placed between the light bulb and the socket to prevent rainwater from entering, and when the light bulb was tightened,
A type of bulb is used in which a glass bulb presses against the backing to seal the gap, but the heat generated by the bulb causes the heat-resistant rubber to age prematurely, rendering it useless.

In order to solve the above-mentioned technical problems, the present invention provides a light bulb in which a cap part is formed of a heat-resistant synthetic resin into a cylindrical shape with a bottom and an electrode is protruded from the bottom surface of the cap part, and the cap part is made of a heat-resistant synthetic resin. a light bulb socket formed into a cylindrical shape with a bottom into which the socket is tightly fitted, and having a contact piece at the bottom that can contact the electrode exposed from the base; a sealing member interposed between the socket and the base; The lighting device is characterized by comprising a socket and a locking member that is disposed on the base and locks the base at a rear end position of the socket.

The base and socket can be formed with high precision by molding synthetic resin, so the gap between the base and socket can be reduced as much as possible, and the backing is interposed between the synthetic resin base and socket. Since there is no direct contact with the glass bulb, the life of the backing can be extended and it can be used safely for a long time.

Moreover, the electrodes and contact pieces of the cap and socket are all provided at the bottom of the cap insertion hole in the socket, and unlike conventional light bulbs, the metal part of the bulb cap does not protrude from the socket and be exposed to the outside. The risk of short circuits and electric shocks caused by objects or fingers touching this metal part has been eliminated.

The present invention will be specifically described below based on embodiments shown in the drawings.

As shown in Figure 1, the base (1) of the light bulb is formed into a cylinder with a bottom by molding phenol resin, heat-resistant polyester resin, epoxy resin, or heat-resistant synthetic resin, and the glass is inserted into the opening of the base (1). A ball (2) is fixed with adhesive.

The base part (1) has two electrodes passing through the bottom part (11).
31 (311) is provided and the conductive wires connected to the filament are connected to each other. One electrode (3) protrudes outward from the center of the bottom in an axial shape, and the other electrode (01) is spaced apart from the central electrode (3). It protrudes briefly to the outside at a certain position.

A narrow notch hole 02 is formed on the circumferential surface of the cap part (1), and a claw piece (51) that engages with a receiving hole (521) of the socket (4), which will be described later, can be inserted into and retracted from the hole. It is deployed.

The end of the claw piece 61) facing the tip of the mouthpiece is pivotally fixed to the cylindrical wall of the mouthpiece, and the other end is biased by a spring.

The socket (4) is formed into a cylindrical body made of heat-resistant synthetic resin like the base part (11), and two contact pieces 16) (621 are provided at the bottom part (41) formed inside the cylindrical body). has been done.

One contact piece (6) is formed into a flanged tube with a groove, and has a through shaft hole +43 in the center of the bottom of the socket.
1 from the outside of the bottom (41), and the flange [F]
A conductive wire (8) is superimposed on υ and screwed to the bottom (41).

The length of the tube part of the contact piece (6) is shorter than the wall thickness of the socket bottom (41), so the contact piece (6) is attached to the socket (1).
It does not come out of the 1 gold insertion hole (40) in the light bulb.

E The slit of the tubular contact piece (6) widens when the axial electrode (3) of the light bulb is inserted, and the tubular contact piece (6) and the electrode come into close contact.

At the bottom of the large dust part of the 10-karat gold light bulb insertion hole (40), an annular contact piece (62) is arranged concentrically with the tubular contact piece (6).

The radial length of the center of the width of the annular contact piece (62) approximately corresponds to the distance between the two electrodes +31G11 of the base.

A conductive wire (81) is connected to the annular contact piece (621) through the socket bottom (41).

On the inner surface of the bulb cap insertion hole (4ω) of the socket (4), at the position where the cap portion (1) has reached the rear end,
) is provided at a position corresponding to the claw piece (51), and the claw piece 61) and the receiver 6 constitute the locking member (5) of the socket.

The receivers 621 are opened gradually deeper in the circumferential direction of the socket (4), and in the embodiment, they are opened at four equally spaced locations.

A ring groove (
421 is opened, and a sealing member (7) such as an O-ring made of heat-resistant synthetic rubber is provided in the groove (42).

To attach the socket (4) to the board (9), as is well known, the cylindrical part of the socket is fitted into the mounting hole made in the board (4), and the flange (screw hole (4)) protruding from the socket mouth part is inserted.
This is done by inserting a screw in 9, hooking it between the edge of the mounting hole on the board and the socket, and screwing the screw in.

However, when the bulb base (1) is inserted into the socket (4) attached to the circuit board (9), the central electrode (3) of the base (1) fits into the tubular contact piece (6) of the socket (4). Thus, the other electrode 31+ hits the annular contact piece -.

If you turn the light bulb a little, the claw (51) of the base (1) will face one of the four receivers (5) of the socket (4), and the claw (51) will release the spring. It pops out due to the bias and fits into the receiver 6'; iJ.

The claw piece (51) is attached to the spring (53) by the inclined surface of the receiver (5).
) The light bulb will not come out of the socket (4) unless it is turned in a direction that pushes it back toward the base (1).

There is almost no gap between the socket (4) and the base part +11, and the sealing member (7) prevents water from entering, so there is no risk of electrical leakage.

In addition, the two contact pieces f61 +621 of the socket (4) are both provided at the bottom (41), and one contact piece (6) in particular is not exposed from the bottom, so when the light bulb is attached or removed, the contact piece There is no risk of electric shock if your fingers touch (6).

4 to 9 show other embodiments, and the embodiment shown in FIG. 4 has a tip at a position equidistant from the center of the bottom (41) on the diameter line of the bottom of the bulb base (1). The enlarged axial electrode (31 (31+) is provided protrudingly.

The bottom of the socket (4) has a pair of arc-shaped insertion slots (441
(441 has been established.

Both insertion slots (4 (a) + 441) are rotationally symmetrical, and one end of each has an enlarged hole width to allow the passage of the enlarged tip of the electrode (31C1υ), and the other end has a hole width of The shaft portion of the electrode +31 (311) is allowed to pass through when the electrode is reduced, but the passage through the enlarged tip portion side (3) is not allowed.

An arc-shaped contact piece f6) +62) is provided on the bottom of the socket (4) (on the back surface of the socket (4), at a position facing the bottom (slightly floating downward from 4υ and facing the insertion slot f441 +44).

The base end of the contact piece t61 +62) is screwed to the bottom (41).

Therefore, insert the electrode (31 (311) of the cap part (1) into the slot (
If you fit it facing the large diameter part of 441+441, the electrode +
31 C11l presses the contact piece (6)-, then turns the insertion slot (4Φ) a little to the narrow side, and slides along the contact piece (6)-, then inserts the electrode +31 C11l and the socket. The insertion slot (4a < aa) of the bottom (41) constitutes a locking member (5) of the cap part, and the cap part (1) is set in the ring 4 (4).

In the embodiment shown in Fig. 6, two electrodes +31C311 with enlarged tips are provided protruding from the bottom of the base part (1) at positions equidistant from the center on the diameter line, as in Fig. 4. At the bottom of the electrode +31, there is a through hole (45
1 (451 has been established.

On the outer surface of the socket bottom (411), there is a contact piece f6+ +621 formed of a spring plate and exposed on the extension of the through hole (451).
There are multiple screws attached to the bottom.

Therefore, insert the bulb base (1) into the socket (4),
If you fit the electrode +31 (311 into the through hole f45) +45 of the socket bottom (41), the electrode (3) +311
are held by the spring contacts (6) (62), and the bulb will not come off the socket (4) unless you pull it out forcefully.

A ring groove (12) is formed on the outer periphery of the mouthpiece (1), and a sealing member (7) such as an O-ring is disposed therein.

The embodiment shown in FIG. 7 includes a shaft-shaped electrode (3) at the center of the base (1), and an electrode (311) formed by bending a spring plate and separated from the electrode (3).

The socket (4) has a tubular contact piece (6) passing through the center of the bottom.
, An annular contact piece (■) is arranged concentrically with the contact piece (6).

A thick flange (13) is provided protruding from the opening edge of the upper end of the mouthpiece (1), and a threaded surface α is formed on the outer periphery of the flange.

The outer periphery of the socket (4) is rotatably fitted into a tightening cylinder (side) with a threaded surface ωυ formed on the inner surface, and the core part (931) and the retaining piece (marked by the Foundation) on the opening edge of the socket (4) are engaged. A stop is drawn to prevent the tightening tube (93) from coming off.

You can do this by inserting the bulb 1's metal part (1) into the socket (4) and tightening the socket (4) with the tightening tube (931).

In the embodiments shown in FIGS. 8 and 9, a thread α9 is formed on the outer periphery of the base (1), and is located a little away from the tip of the socket bottom of the thread (15) and on the extension line of the thread (15). A protrusion 06) is provided protrudingly located at a position slightly lower than the thread.

A threaded groove (461) is formed on the socket (4), and a receiving portion (4η) into which the protrusion (10 is fitted) is formed on the extension of the groove (4ω) a little apart from the end of the groove (46). There is.

Between the end of the groove (4e) and the part (4η) is the protrusion (16
), forming a passageway slightly shallower than the height of .

Therefore, screw the bulb base part (1) into the socket (4),
The protrusion (16) of the cap part (1) is connected to the groove of the socket (4) (
After reaching the end of the socket (461), if you twist the bulb even more forcefully, the protrusion (16) will elastically deform and open the passage (4η) of the socket (4).
When it runs over the passageway (471) and reaches the receiving part (47) of the socket (4), it returns to its original shape and fits into the socket (4).

There is no risk of the bulb coming off unless you turn it in the opposite direction.

Two electrodes F3) of the base part (1) in Fig. 8 above 01)
As in Fig. 1, the two contacts T61 of the socket (4)
Among +621, one contact piece (6) is formed into a tubular shape and is placed in the center of the bottom part (41), and the other contact piece (@ is the base part (
It is arranged at a position corresponding to the shorter electrode c31) in 1).

In the case of No. 71 cutting and FIG. 8, an annular backing (711) is interposed between the opening edge of the socket (4) and the flange (13) of the mouthpiece (1) to prevent water from entering. It is referred to as member (7).

[Brief explanation of the drawing]

Figure 1 is a sectional view of the lighting device, Figure 2 is a sectional view taken along the line ■-■ in Figure 1, Figure 3 is a bottom view of the socket, Figure 4 is a sectional view of another lighting device, and Figure 5. 4 is a bottom view of the illumination device, FIGS. 6 to 8 are sectional views of other embodiments, and FIG. 9 is a sectional view taken along line IX-IX in FIG. 8. (1)...Base part +3) (3υ...Electrode (4)...Socket +6+ (621...Touch piece (
7) Seal member

Claims (1)

[Scope of Claims] ■ A light bulb in which a cap part (1) is formed of heat-resistant synthetic resin into a cylindrical shape with a bottom, and an electrode (3) cap υ is protruded from the bottom surface of the cap part txt, and a heat-resistant stand made of synthetic resin. The base part (1) is formed into a cylindrical shape with a bottom, into which the base part (1) is tightly fitted, and has a contact piece (6) at the bottom that can contact the electrodes (3) (31) of the base part (1). Light bulb socket (4), socket (4) and base part (1)
) and the sealing member (7) interposed between the socket (
4) and a locking member (5) that is provided on the base (1) and locks the base (1) at the rear end position of the socket (4). ■ One electrode (3) protrudes axially from the center of the bottom of the base part (1), the other electrode c1υ protrudes briefly, and one contact piece (6) is formed into a tubular shape and opens at the center of the bottom of the socket. The illumination device according to claim 1, wherein the contact piece (621) is attached to the inner surface of the through-shaft hole (43), and the other contact piece (621) is formed in an annular body concentric with the through-shaft hole (43). The locking member (5) includes a receiving hole which is gradually deepened in the circumferential direction on the inner surface of the socket (4), and a base part (1).
3. The illumination device according to claim 1, further comprising a claw piece (51) that is disposed on the outer circumferential surface of the lamp so as to be retractable by a spring force, and that engages and disengages from the receiving hole mark. ■ The electrode [3] (31) is protruded in the shape of a shaft with an enlarged tip at an equal distance from the center of the bottom part 01) on the diameter line of the bottom part 0D of the base part (1). A pair of through-insertion slots (fences) are opened in a pair of circular arc shapes with the center of curvature and one rotational direction side reduced to a width that does not allow passage of the enlarged part side (3) of the tip of the electrode +31C1υ.
The insertion slot (44) (44 and the electrode +31 f311 constitute a locking member (5), and each insertion slot (44114)
4) The illumination device according to claim 1, wherein the contact piece t6) (621) is disposed at a position opposite to the electrode [3) 01). The bottom of the socket has an electrode +3.
A through insertion hole +451 F45) was opened corresponding to 1011, and the insertion hole! 45) A contact piece F6) 1621 formed of a spring plate on the outside of (45) is arranged to protrude on the extension of the insertion hole (45), and the contact piece [61 (621) and the electrode (31 (31) The lighting device according to claim 1, wherein the locking member (5) is constituted by: (1) The sealing member (7) is an O-ring attached to the inner surface of the socket (4); The lighting device according to any one of items 1 to 5.