JPH0676902A - Screwing socket - Google Patents

Abstract

PURPOSE:To completely prevent an electrical shock by providing structure where a current is not easily supplied even if a human hand is accidentally inserted when a bulb is not disposed. CONSTITUTION:A screwing socket is provided with a socket metal 14 for screwing a bulb 21 and positive and negative terminals 6, 11 exposed to a bulb inserting portion A. One of the positive and negative terminals 6, 11 is connected to a terminal portion 5 on a side of a power source via a plate spring 10 for opening or closing a contact, having a contact 12 which can be freely brought into or out of contact therewith. The socket metal 14 is disposed movably in the direction D opposite to the screwing direction C of the bulb 21. When the socket metal 14 is moved in the direction D opposite to the screwing direction C of the bulb 21 against resilient force of a return spring 20, the contact 12 is brought into contact with one of the terminals 6, 11, thus leading to a continuity state. If the bulb 21 is not disposed, it is possible to prevent easy continuity even when a human hand is accidentally inserted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a screw-in socket having a contact opening / closing mechanism in which a light bulb is screwed into a conductive state.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 7, this kind of screw-in socket has an inside portion A of a light bulb provided with a receiving member 31 for screwing a light bulb through a terminal fixing member 30.
And the power source side B having the positive and negative polar terminals 32 and 33 built therein, and the contact portions 32a of the positive and negative polar terminals 32 and 33,
33a, a pair of contact springs 35 mounted on the movable plate 34,
The contact points 35a, 36a on the back side of 36 are arranged to face each other,
The return spring 37 keeps the off state, and the contact portions 35b, 36b on the front side of the pair of contact springs 35, 36 are provided.
Is arranged so as to face the receiving metal 31 of the screwed socket 1 '. Then, when the light bulb is screwed into the receiver 31, the movable plate 34 resists the spring force of the return spring 37 and the terminal fixing member 30.
The contact opening / closing mechanism P'is turned on to be turned on (see, for example, Japanese Utility Model Laid-Open No. 61-29481).

[0003]

However, since the ON operation of the above-mentioned conventional contact opening / closing mechanism P'is a method of pushing the movable plate 34, that is, a so-called push method, when a light bulb is not attached, it is erroneously operated by a person. When the hand is inserted,
Since the insertion direction of the hand (the direction C of the bulb approaching) and the moving direction of the movable plate 34 coincide with each other, there is a problem in that the electric conduction can be prevented simply by pushing the hand in and the electric shock cannot be prevented.

The present invention has been made in view of the above conventional problems, and an object thereof is to make a contact opening / closing mechanism even when a human hand is mistakenly inserted without a light bulb being attached. It is an object of the present invention to provide a screw-in socket having a structure that does not easily conduct electricity and capable of taking sufficient measures against electric shock.

[0005]

In order to solve the above-mentioned problems, the present invention comprises a receiving cap 14 for screwing a light bulb, and positive and negative polar terminals 6 and 11 exposed at the insertion portion A of the light bulb. In the screw-in socket 1 in which at least one of the terminals 6 and 11 of both poles is connected to the power source side terminal parts 5 and 4 via the contact opening / closing mechanism P which can be opened / closed, the female screw part 23 into which the base 22 of the light bulb 21 is screwed. The received money 14 provided is movably arranged in a direction D opposite to the screwing direction C of the light bulb 21, and a return spring 20 for constantly urging the money 14 in the screwing direction C of the light bulb 21 is arranged. When the light bulb 21 is screwed into the receiving metal 14, the receiving metal 14 moves in the direction D opposite to the screwing direction C of the light bulb 21 against the spring force of the return spring 20 to make the contact opening / closing mechanism P conductive. .

The receiving metal 14 may be pulled out by linear movement in a direction D opposite to the screwing direction C of the light bulb 21. The receiving metal 14 is pulled out by rotational movement in a direction D opposite to the screwing direction C of the light bulb 21, and
It may be configured to be in a conductive state when a torque of a certain level or more is applied to the receiving money 14.

[0007]

According to the present invention, when the light bulb 21 is screwed into the female threaded portion 23 of the receiver 14, the receiver 14 moves in the direction D opposite to the screwing direction C of the light bulb 21 against the spring force of the return spring 20. Since the contact opening / closing mechanism P is made conductive,
If the light bulb 21 is not attached, the inserting direction of the hand (the approach direction C of the light bulb 21) and the moving direction of the receiving pad 14 are opposite even when the hand of the person is accidentally inserted. Since the contact opening / closing mechanism P does not easily conduct only by putting a hand, no current flows in the screwed socket 1 and an electric shock can be prevented.

[0008]

EXAMPLE An example of the present invention will be described below. As shown in FIGS. 1A to 1D, the screw-in socket 1 used in this embodiment has a cylindrical body 2 made of an insulating material.
The interior is partitioned by the terminal fixing member 3, and the insertion portion A of the electric bulb is provided with the opening 24 for screwing in the electric bulb, and the power source side B that has the positive and negative pole terminals 6 and 11 exposed in the insertion portion A of the electric bulb. It is divided in two. Positive and negative pole terminals 6, 1
As shown in FIG. 1 (b), the first terminal 11 out of 1 is made of a substantially L-shaped conductive material that penetrates the peripheral opening 3 a of the terminal fixing member 3 and is arranged at the insertion portion A of the light bulb. The light bulb side terminal portion 7 and the power source side terminal portion 4 arranged on the power source side B are connected to each other. The power supply side terminal portion 4 is fixed to the lower surface side of the terminal fixing member 3 by a terminal screw 8. Further, the second terminal 6 is fitted through the central opening 3b of the terminal fixing member 3, and the surface 6a of the second terminal 6 is arranged so as to face the insertion portion A of the light bulb. The back surface 6b of the terminal 6 is arranged facing the power source side B.
A contact opening / closing leaf spring 10 forming a contact opening / closing mechanism P is arranged below the second terminal 6. A contact 12 is provided at the upper end of the contact opening / closing leaf spring 10 so as to be in contact with and separated from the back surface 6b of the second terminal 6, and the power source side terminal portion 5 is provided at the lower end of the contact opening / closing leaf spring 10. This power supply side terminal portion 5 is fixed to the lower surface side of the terminal fixing member 3 by a terminal screw 9.

The bracket 14 for screwing the light bulb is shown in FIG.
As shown in FIG. 3, it is composed of a substantially L-shaped spring member and penetrates the peripheral opening 3c of the terminal fixing member 3 to insert the bulb A.
And a contact drive section 13 arranged on the power source side B. The receiving contact piece 15 is vertically arranged along the inner surface of the body 2 of the insertion portion A of the light bulb, and has the female screw portion 23 into which the base 22 (FIG. 2) of the light bulb 21 is screwed. The upper end of the money receiving contact piece 15 is placed on a step surface 17 formed on the inner surface of the body 2 so that the money receiving 14 can be supported from below.
In addition, the contact drive unit 13 arranged on the power supply side B extends to a position overlapping the lower surface of the contact opening / closing leaf spring 10 on the lower surface side of the terminal fixing member 3 (state of FIG. 1D), and the whole. It is covered with an insulating piece 18. The insulating piece 18 electrically insulates the contact drive portion 13 and the contact opening / closing leaf spring 10 which overlap each other. Further, the return spring 20 is interposed between the contact drive unit 13 and the terminal fixing member 3, and in the state where the light bulb 21 is not mounted, the money receiving contact piece 15 is driven by the spring force of the first terminal 11 to move the light bulb 21 of the light bulb 21. The contact drive unit 13 is always pulled in the same direction as the approach direction C, and the contact drive unit 13 does not press the contact drive unit 13 toward the second terminal 6.

In the above structure, when the electric bulb 21 is mounted, the electric bulb 21 is attached to the opening 2 of the insertion portion A of the electric bulb.
Female thread portion 23 of the receiving contact piece 15 by inserting while rotating from 4
The positive and negative poles 25 and 26 of the light bulb 21 are brought into contact with the first terminal 11 to establish electrical connection with the bulb side terminal portion 7, and the other pole of the positive and negative poles 25 and 26 of the light bulb 21 is When the light bulb 21 is further rotated while being in contact with the surface 6a of the second terminal 6, the receiving contact piece 15 is smoothly pulled out toward the opening 24 side of the screwed socket 1 by the rotation of the base 22 of the light bulb 21. The contact drive portion 13 integrated with the receiving contact piece 15 presses the contact opening / closing leaf spring 10 toward the second terminal 6 against the spring force of the return spring 20. As a result, the contact 12 comes into contact with the back surface 6b of the second terminal 6, and the second terminal 6 and the power supply side terminal portion 5 are brought into conduction (FIG. 2).
State). Conversely, when the light bulb 21 is turned in the direction D, the receiving contact piece 15 is returned to the original position by the spring force of the return spring 20, and the contact drive section 13 releases the pressing of the contact opening / closing leaf spring 10. The contact 12 separates from the second terminal 6 and returns to the original off state in which no current flows.

As described above, since the contact opening / closing mechanism P is turned on by using the method in which the receiver 14 is pulled out toward the opening 24 of the screwed socket 1, the light bulb 2 is operated.
When the electric current flows for the first time in the state that 1 is completely attached and the light bulb 21 is not attached, the hand insertion direction (the approach direction C of the light bulb 21 C is inserted even when the hand of the person is accidentally inserted. ) And the moving direction C of the receiving metal 14 are opposite to each other, so that the contact opening / closing mechanism P does not easily conduct only by inserting a hand.
No current flows through the screw-in socket 1, so that electric shock can be prevented and safety can be ensured.

Another embodiment of the present invention is shown in FIGS. In this embodiment, the light receiving screw 14 'for screwing the light bulb is
As shown in FIGS. 3A to 3C and FIG. 4, the second terminal 6 is electrically connected to the power source side terminal portion 5. On the other hand, in the insertion portion A of the light bulb, a cylindrical receiving movable portion 16 having a female screw portion 23 is rotatably accommodated. An upper portion of a contact opening / closing contact spring 15 ′ is attached to the receiving movable portion 16, and a lower portion of the contact opening / closing contact spring 15 ′ has a detent rib 40 protrudingly provided on the outer surface of the receiving movable portion 16. Is bent along the lower surface of the. The anti-rotation rib 40 is inserted into a guide groove 41 formed on the inner surface of the body 2,
The rotation of the money receiving movable portion 16 is blocked by the guide groove 41, and the money receiving movable portion 16 can be linearly moved along the guide groove 41. Further, the guide groove 41 is provided at its upper end with a space portion 42 without the guide groove 41, and the light bulb side terminal portion 7 electrically connected to the first terminal 11 is arranged in the space portion 42. Therefore, the detent rib 40 of the movable receiving portion 16 enters the space 42 from the guide groove 41, so that the end of the contact opening / closing contact spring 15 'disposed on the lower surface of the detent rib 40 has the bulb-side terminal portion. You can touch 7. Further, a return spring 20 'composed of a coil spring is inserted below the money receiving movable portion 16. As shown in FIG. 4, one end 20 a of the return spring 20 ′ is hooked on a spring hooking portion 50 formed on the lower surface of the receiving movable portion 16, and the other end 20 b of the return spring 20 ′ is connected to the terminal fixing member 3. Fixing part 50 (Fig. 3 (b))
The receiving movable portion 16 is constantly pulled toward the approaching direction C of the light bulb 21 by the return spring 20 'while receiving a twisting force in a direction opposite to its rotating direction.

Here, when the electric bulb 21 is mounted, the electric bulb 21 is inserted through the opening 24 of the insertion portion A of the electric bulb while being rotated and screwed into the female screw portion 23 of the movable receiving part 16. The other poles of 25 and 26 come into contact with the surface 6a of the second terminal 6 and become conductive with the power source side terminal portion 5. When the light bulb 21 is further continuously rotated from this state, the money receiving movable part 16 is moved along the guide groove 41 to the opening 2
When the anti-rotation rib 40 reaches a position where the guide groove 41 does not exist, it is smoothly drawn out to the 4th side, and the receiving movable part 16 has a torque of a certain level or more ([tightening torque of the light bulb 21 + torque for overcoming the guide groove 41. Torque larger than the above), the anti-rotation rib 4 of the movable receiving part 16
When 0 passes over the guide groove 41 and enters the space portion 42, the movable receiving portion 16 rotates against the torsional force of the return spring 20 ', and the contact opening / closing contact spring 15' causes the contact opening / closing contact spring 15 'to move. The light bulb side terminal portion 7 is electrically connected (state in FIG. 6). Then, the pulling force of the return spring 20 'causes the contact opening / closing contact spring 15' and the bulb-side terminal portion 7 of the first terminal 11.
And are elastically contacted with each other, so that the conductive state is surely maintained. On the contrary, when the light bulb 21 is rotated in the direction D, the receiving movable part 16 is twisted by the return spring 20 'and the light bulb 2 is rotated.
1 is rotated in the opposite direction to that at the time of mounting, the contact between the contact portion 12 'of the contact opening / closing contact spring 15' and the light bulb side terminal portion 7 of the first terminal 11 is released, and further the terminal fixing member 3 is attached. It is attracted and returns to the off state where no current flows.

As described above, the light receiving movable part 1 is driven by the light bulb 21.
By tightening 6 with a certain torque or more, the light bulb 2
The base 22 of No. 1 is securely fitted to the female screw portion 23 of the movable receiving portion 16 so that a halfway tightened state does not occur.
The function of preventing the detachment of the electric bulb 21 can be obtained, and a reliable mounting feeling of the electric bulb 21 can be obtained. Further, when the light bulb 21 is not attached, even if a person's hand is mistakenly inserted, the contact opening / closing mechanism P does not easily become conductive simply by putting the hand in, and thus electric shock is sufficiently prevented. It will be possible to further enhance safety.

[0015]

As described above, according to the present invention, a receiver having a female screw portion into which a cap of a light bulb is screwed is arranged so as to be movable in a direction opposite to a screwing direction of the light bulb, and the receiver is arranged in a screwing direction of the light bulb. A return spring that constantly biases the spring is arranged, and when the light bulb is screwed into the receiver, the receiver moves in the direction opposite to the screwing direction of the light bulb against the spring force of the return spring to conduct the contact opening / closing mechanism. Therefore, the structure is such that the receiver is pulled out toward the opening of the screwed socket, and if the light bulb is not attached, the contact opening / closing mechanism can be easily conducted even if a human hand is accidentally inserted. It ’s hard to do,
Prevents electric shock. As a result, safety is improved and cost reduction is achieved as compared with non-lighting prevention measures on the ballast side.

Similarly, in the case where the receiving wire is pulled out by linear movement in the direction opposite to the screw-in direction of the light bulb, when the light bulb is not attached, the contact is made by merely pushing the receiving wire by a human hand. The open / close mechanism has a structure that makes it difficult to conduct electricity, thus ensuring complete electric shock prevention measures. Further, in the case where the receiving metal is pulled out by the rotational movement in the direction opposite to the screwing direction of the light bulb, and the conducting state is not established unless a certain torque is applied to the receiving metal, similarly,
The contact opening / closing mechanism does not easily conduct electricity simply by pulling out the receiving metal, and measures to prevent electric shock can be taken, and a function to prevent the bulb from coming off can be added, giving a secure fit of the bulb. .

[Brief description of drawings]

FIG. 1 shows a screwed socket used in an embodiment of the present invention, (a) is a plan view, (b) is a sectional view taken along line EE of (a), and (c) is F- of (a). F line sectional drawing, (d) is a bottom view.

FIG. 2 is a cross-sectional view showing a state in which a light bulb is attached to a screwed socket in the same as above.

FIG. 3 shows a screw-in socket used in another embodiment of the present invention, (a) is a plan view, (b) is GG of (a).
A line sectional view, (c) is a H-H line sectional view of (a).

FIG. 4 is an exploded perspective view of the money receiver and the return spring of FIG.

5 is a cross-sectional view taken along the line I-I of FIG. 3 (b).

FIG. 6 is a cross-sectional view showing a state in which a light bulb is attached to the screwed socket of FIG.

FIG. 7 is a cross-sectional view showing a conventional screwed socket.

[Explanation of symbols]

 1 Screw-in socket 6,11 Terminal 14 Receiving 20 Return spring 21 Light bulb 22 Base 23 Female screw portion 24 Opening A A Light bulb insertion portion C Screwing direction D Opposite direction

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takunobu Sagawa 1048, Kadoma, Kadoma, Osaka Prefecture Matsushita Electric Works Co., Ltd. Within

Claims (3)

[Claims] 1. A power source side through a contact opening / closing mechanism, which comprises a receiving member for screwing in a light bulb and terminals of positive and negative polarities exposed at an insertion portion of the light bulb, and at least one of the terminals of the positive and negative polarities is contact openable and closable. In the screw-in socket connected to the terminal part of the lamp, the receiver having the female screw part into which the base of the light bulb is screwed is arranged so as to be movable in the direction opposite to the screw-in direction of the light bulb, and the receiver is always springed in the screw-in direction of the light bulb. A return spring for urging is arranged, and when the light bulb is screwed into the above-mentioned receiving metal, the receiving metal moves in the direction opposite to the screwing direction of the light bulb against the spring force of the return spring to conduct the contact opening / closing mechanism. A screwed socket that is characterized by 2. The screw-in socket according to claim 1, wherein the socket is pulled out by linear movement in a direction opposite to a screw-in direction of the light bulb. 3. The receiving member is configured to be pulled out by rotational movement in a direction opposite to a screwing-in direction of a light bulb, and to be in a conductive state when a torque of a certain level or more is applied to the receiving member. A screwed socket.