JPH0650949Y2 - Elastic holding member for rod-shaped incandescent lamp base - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elastic holding member which detachably holds a cap of a rod-shaped incandescent lamp.

[0002]

2. Description of the Related Art In recent years, the development of a rod-shaped incandescent lamp has made great progress and is reaching a practical level. Even if the rod-shaped incandescent lamp is put to practical use, it can be said that the cap of the rod-shaped incandescent lamp has a different structure and shape from the caps of the conventional spherical incandescent lamp and rod-shaped fluorescent lamp. That is, unlike the structure and shape in which a plurality of cap pins are axially projected from the end face of a cylindrical base such as a spherical incandescent lamp or a cylindrical base such as a rod-shaped fluorescent lamp, a relatively thick wall It is assumed to have a prismatic plate-like structure. However, even if the rod-shaped incandescent lamp has such a relatively thick-walled prismatic plate-shaped base, there is currently no socket adapted to it. Therefore, development of a socket adapted to a rod-shaped incandescent lamp is desired.

In order to provide the developed socket with a conductive function and a holding function for a rod-shaped incandescent lamp, a base contact portion corresponding to a base protruding outside the diameter of the rod-shaped incandescent lamp and a power source connecting portion connected to the power source side are provided. It is necessary to assemble the conductive terminal member provided with and the elastic holding member of the base which detachably elastically holds the base inserted in the socket.

By the way, as the elastic holding member for the mouthpiece incorporated in this type of socket, the members shown in FIGS. 3 and 4 can be considered. That is, the socket includes a base 1 molded from an electrically insulating material, and a case 2 molded from an electrically insulating material that is detachably integrated with the base 1 by fitting the base 1 from the front side. A recess 5 is formed to allow the base 4 of the rod-shaped incandescent lamp 3 to be inserted and withdrawn. Further, although not shown, a conductive terminal member provided with a base contact portion corresponding to the base 4 and a power supply connection portion connected to the power source side is attached to the base 1, and the base contact portion of the conductive terminal member is attached. Faces the recess 5. The elastic holding member 6 of the mouthpiece is made of a plate-shaped high-elasticity metal, and is attached to the back surface of the base 1 by attaching means such as screws, and extends horizontally in the width direction of the base 1.
And arm portions 6B, 6B extending from the both ends of the horizontal base 6A in the width direction of the base 1 to the front (upper in the illustrated example) of the surface, and the front ends of the arm portions 6B, 6B in the width direction of the base 1. Spread inward and extend forward,
It is provided with arcuate sandwiching portions 6C, 6C facing each other, and the arcuate sandwiching portions 6C, 6C are made to face the concave portion 5. With the elastic holding member 6 of such a base, as shown in FIG. 4, until a part of the outer peripheral surface of the rod-shaped incandescent lamp 3 comes into contact with the substantially semicircular recessed surface of the ceiling of the case 2, When the base 4 is inserted into the recess 5 of the case 2, the top of the base 4 is brought into electrical contact with the base contact portion of a conductive terminal member (not shown). Further, during the insertion of the mouthpiece 4 into the recess 5 of the case 2, the holding portions 6C, 6C of the elastic holding member 6 of the mouthpiece which is exposed to the recess 5 interferes with both side surfaces of the mouthpiece 4 and the arm portion 6B, 6B once expands elastically.
At the insertion completion position of the mouthpiece 4 into the recess 5 of the case 2, the recess 4a formed in the mouthpiece 4 holds the sandwiching portions 6C and 6C.
Corresponding to C, the arms 6B and 6B elastically return to the expanded state, which is close to the free state. That is, the sandwiching portions 6C, 6C enter the recess 4a to elastically sandwich and hold the base 4, thereby ensuring a reliable electrical contact state between the rod-shaped incandescent lamp 3 and the socket, and occurrence of contact failure and rod-shaped. The incandescent lamp 3 will be prevented from falling off. Of course, by grasping the rod-shaped incandescent lamp 3 and pulling it in the direction opposite to the base 4, the rod-shaped incandescent lamp 3 can be easily removed from the socket.

However, the elastic holding member 6 of the mouthpiece described above allows elastic expansion of the arms 6B and 6B,
The value of the moment arm L increases, and the elastic holding member 6
The value of the elastic clamping force with respect to the spring constant becomes smaller. Therefore, as when mounting the socket on the ceiling,
In the mounting posture in which the rod-shaped incandescent lamp 3 is suspended below the socket, the rod-shaped incandescent lamp 3 may fall off due to the weak elastic clamping force.

[0006]

The problem to be solved is that the value of the elastic holding force with respect to the spring constant of the elastic holding member is small because the value of the moment arm of the arm portion of the elastic holding member of the mouthpiece is large. In the mounting posture in which the rod-shaped incandescent lamp is hung below the socket, the rod-shaped incandescent lamp may fall off due to its own weight due to the weak elastic clamping force.

[0007]

SUMMARY OF THE INVENTION The present invention comprises a base molded from an electrically insulating material, and a case molded from an electrically insulating material and removably integrally coupled by fitting the base from the surface side. In a rod-shaped incandescent lamp socket, which detachably and elastically retains a base projecting to the outside of the rod-shaped incandescent lamp, a horizontal base attached to the base and extending in the width direction of the base, and a horizontal base in the horizontal base. Arm portions that extend forward from the both widthwise positions of the base and are in contact with or close to the inner surface of the case, and extend from the front ends of these arm portions inward in the width direction of the base toward the surface. A sandwiching portion that has a first extending portion and a second extending portion that continuously extends from the extending end of the first extending portion toward the surface outward in the width direction of the base and that faces each other. It is equipped with a large elastic clamping force so that even if the rod-shaped incandescent lamp is suspended under the socket, the rod-shaped incandescent lamp can be reliably prevented from falling off due to its own weight even in the mounting position. Realized the purpose to.

[0008]

According to the present invention, the elastic expansion of the arm portion of the elastic holding member of the base in the width direction of the base can be restricted by the inner surface of the case fitted to the base. That is, since elastic expansion of the arm portion is not allowed, the value of the moment arm is reduced to a small value corresponding to the length of the first extending portion. Therefore, the value of the elastic holding force with respect to the spring constant of the elastic holding member becomes large, and the base can be elastically held with a strong holding force.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a vertical cross-sectional view, and the same or corresponding parts as those in the conventional example will be described with the same reference numerals. Socket is
A base 1 molded of an electrically insulating material and a case 2 molded of an electrically insulating material that is detachably integrally fitted by fitting the base 1 from the surface side are provided, and the case 2 includes a rod-shaped incandescent lamp 3. A recess 5 is formed to allow the base 4 to be taken in and out. Further, although not shown, a conductive terminal member provided with a base contact portion corresponding to the base 4 and a power supply connection portion connected to the power source side is attached to the base 1, and the base contact portion of the conductive terminal member is attached. Faces the recess 5. The elastic holding member 6 of the mouthpiece is made of a plate-shaped high-elasticity metal, is attached to the back surface of the base 1 by attaching means such as screws, and extends horizontally in the width direction of the base 1, and the horizontal base portion 6A. 6A, arm portions 6 extending from both widthwise end positions of the base 1 to the front side (upper side in the illustrated example) of the surface and contacting the inner surface of the case 2.
B, 6B, a first extending portion 6X extending inward in the width direction of the base 1 toward the surface from the front ends of the arm portions 6B, 6B, and an extending end of the first extending portion 6X. The base 1 is provided with the sandwiching portions 6Z and 6Z facing each other with the second extending portion 6Y extending outward in the width direction, and the sandwiching portions 6Z and 6Z are made to face the recess 5. ing.

With the elastic holding member 6 of such a base, as shown in FIG. 2, a part of the outer peripheral surface of the rod-shaped incandescent lamp 3 is brought into contact with a substantially semicircular recessed surface of the ceiling of the case 2. Until the base 4 is inserted into the recess 5 of the case 2,
The top of the base 4 is brought into electrical contact with a base contact portion of a conductive terminal member (not shown). Further, while inserting the mouthpiece 4 into the recess 5 of the case 2, the first extending portion 6X and the second extending portion 6Y of each of the holding portions 6Z, 6Z of the elastic holding member 6 of the die that is exposed to the recess 5 are provided. The boundary part between and interferes with both side surfaces of the base 4. Since the arms 6B, 6B are in contact with the inner surface of the case 2, elastic expansion of the base 1 in the width direction is restricted, so that both side surfaces of the mouthpiece 4 have the first extending portion 6X.
The first extension portion 6X is elastically expanded with the boundary portion between the second extension portion 6Y and the second extension portion 6Y as a free end. At the insertion completion position of the base 4 into the recess 5 of the case 2, the recess 4a formed in the base 4 corresponds to the sandwiching portions 6Z and 6Z, and the first extending portion 6
X elastically returns to the expanded state close to the free state. That is,
The holding portions 6Z, 6Z enter the concave portion 4a and hold the base 4 by elastically holding it. In this way, the arm portions 6B, 6B
Since elastic expansion of is not allowed, the value of the moment arm is reduced to a small value corresponding to the length L1 of the first extending portion 6X. Therefore, since the value of the elastic holding force with respect to the spring constant of the elastic holding member 6 can be increased, the rod-shaped incandescent lamp 3 can be used as in the case where a socket is attached to the ceiling or the like.
It is possible to reliably prevent the rod-shaped incandescent lamp 3 from falling off even in a mounting posture in which the lamp is hung below the socket. Also, by grasping the rod-shaped incandescent lamp 3 and pulling it in the direction opposite to the base 4,
Since the first extending portion 6X can be elastically expanded by applying a load to the first extending portion 6X via the second extending portion 6Y, the rod-shaped incandescent lamp 3 can be easily removed from the socket.

In the above-mentioned embodiment, when the case 2 is fitted from the front surface side of the base 1 and detachably integrally coupled, the arm portions 6A, 6A are brought into contact with the inner surface of the case 2. However, the arm portions 6A and 6A may be arranged close to the inner surface of the case 2.

[0012]

As described above, according to the present invention, the value of the moment arm is reduced to a small value corresponding to the length of the first extending portion, and the elastic holding force with respect to the spring constant of the elastic holding member is reduced. By increasing the value of, the base can be elastically held by a strong clamping force, so even if the rod-shaped incandescent lamp is hung below the socket, the rod-shaped incandescent lamp does not fall off due to its own weight. It has the advantage that it can be elastically retained.

[Brief description of drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of an elastic holding member for a base incorporated in a rod-shaped incandescent lamp socket.

FIG. 2 is a vertical sectional view showing an elastically held state of a die.

FIG. 3 is a vertical sectional view of a comparative example.

FIG. 4 is a vertical cross-sectional view of a comparative example of FIG. 3 in a state in which a die is elastically held.

[Explanation of symbols]

 1 base 2 case 3 rod-shaped incandescent lamp 4 base 6 elastic holding member of base 6A horizontal base 6B arm part 6X first extension part 6Y second extension part 6Z sandwiching part

Claims (1)

[Scope of utility model registration request] 1. A rod-shaped incandescent lamp socket provided with a base molded from an electrically insulating material, and a case molded from the electrically insulating material and fitted to the base from the surface side to be detachably integrated. An elastic holding member for a base that detachably elastically holds a base projecting outside the diameter of a rod-shaped incandescent lamp, the horizontal base being attached to the base and extending in the width direction of the base, and the base of the horizontal base. An arm portion extending from both end positions in the width direction to the front side of the surface and contacting or approaching the inner surface of the case,
A first extending portion extending inward in the width direction of the base toward the surface from the front ends of the arm portions, and the surface extending outward in the width direction of the base continuously from the extending end of the first extending portion. An elastic holding member for a rod-shaped incandescent lamp base, comprising a sandwiching portion that has a second extending portion that extends toward and that faces each other.