JPH0727077U - Lamp socket - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a lamp socket for holding a lamp without tilting it. [Structure] A base 1 has a cylindrical tubular portion 8, and a holding recess 8a for inserting a lamp base is formed in the tubular portion 8. In the holding recess 8a, a pair of peripheral side contactors 4a contacting the outer peripheral electrode of the base are provided so as to sandwich the base so as to face each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a lamp socket applied to a lamp provided with an E-shaped base having a threaded portion on its peripheral surface.

[0002]

[Prior art]

 In general, lamps such as incandescent bulbs that are commercially available have E-type caps such as E11 and E12. In this type of die, a screw portion that serves as an outer peripheral electrode is formed on the outer peripheral surface, and a tip electrode is provided at the center of the front end surface. As shown in FIG. 10, a lamp socket for holding a lamp provided with such a base is provided with a base 1 on which a cylindrical tubular portion 8 is provided in a protruding manner, and is provided inside the tubular portion 8. The base of the lamp is inserted into the recess 8a. A screw receiver 8b is formed on the inner peripheral surface of the holding recess 8a so as to be screwed into the screw portion of the base. In this screw receiver 8b, a screw thread formed along the inner peripheral surface of the holding recess 8a is divided at two circumferential positions of the tubular portion 8 by groove portions 9a and 9b extending over substantially the entire length in the central line direction of the tubular portion 8. It is formed in the shape. A peripheral side contactor 4a that contacts the outer peripheral electrode of the base is provided in one groove 9a, and a bottom side contactor 3a that contacts the tip electrode of the base is provided along the bottom surface of the cylindrical part 8 from the other groove 9b. It will be extended. The peripheral side contactor 4a and the bottom side contactor 3a are respectively formed of sheet metal having conductivity, and when the base of the lamp is screwed into the holding recess 8a, the peripheral side contactor 4a is a threaded portion. It makes elastic contact with the electrode, and the bottom contact 3a makes elastic contact with the tip electrode. Here, as shown in FIG. 11, a contact portion 4b which is bent inward of the holding recess 8a is formed at the tip of the peripheral contactor 4a. (In FIG. 11, two peripheral side contactors 4a are shown, but only one of them is provided.) As a lamp socket, as shown in FIG. 12, the groove 9a is formed on the inner peripheral surface of the cylindrical portion 8. , 9b, another groove portion 9c is formed, and instead of the groove portion 9a, the peripheral portion contactor 4a is arranged in the groove portion 9c.

[0003]

Problems to be Solved by the Invention In any of the above-described lamp sockets, the following problems occur because the peripheral contact 4a is elastically contacted only at one location on the side surface of the base. That is, when the height of the contact portion 4b from the bottom surface of the holding recess 8a is relatively high as shown in the right circumferential contactor 4a in FIG. 11, when the base 11 is inserted into the holding recess 8a. Since the contact portion 4b elastically contacts the upper portion of the base 11, the upper portion of the lamp 10 is inclined in the protruding direction of the contact portion 4b according to the play between the screw portion of the base 11 and the screw receiver 8b. Further, when the height position of the contact portion 4b is relatively low as shown in the left peripheral contactor 4a in FIG. 11, the contact portion 4b comes into contact with the tip side of the base 11, so that the upper portion of the lamp 10 has a connecting portion. 4b will be inclined to the opposite side to the protruding direction. Inclination of the lamp 10 with respect to the center line of the holding recess 8a causes a problem that the lighting device for a house, such as a ceiling light or a pendant, does not look good. As a result, with a lighting fixture for light projection using a halogen lamp or the like, there is a problem in that the light distribution in the desired direction cannot be obtained.

In order to prevent the inclination of the lamp 10 as described above, as shown in FIG. 13, at a plurality of circumferential locations on the inner peripheral surface of the holding recess 8a, a plurality of locations along the center line direction of the tubular portion 8 are provided. It is possible to project the rib 20. With this structure, when the base 11 is inserted into the holding recess 8a, the ribs 20 come into contact with the threaded portions of the base 11, so that the inclination of the lamp 10 can be reduced. However, even if such a configuration is adopted, the lamp 10 tilts unless the base 11 is sufficiently inserted into the holding recess 8a, and the tilt of the lamp 10 changes depending on the amount of the base 11 inserted. There is. Also, the smaller the play between the rib 20 and the threaded portion of the base 11, the smaller the inclination of the lamp 10, but if the play is made smaller, when the base 11 is deformed into a non-circular shape, There is a problem that it becomes difficult to screw in the screw 10, and the insertability of the base 11 into the holding recess 8a is impaired.

The present invention has been made in view of the above problems, and an object of the present invention is to enable the lamp to be held without tilting without impairing the insertability of the base into the holding recess. The purpose of this is to provide a lamp socket that holds the lamp in a good condition and allows the light distribution as designed to be obtained.

[0006]

[Means for Solving the Problems]

 According to the invention of claim 1, a base having a holding recess into which the base of the lamp is inserted, and a screw receiver that is screwed into a screw portion formed on the peripheral surface of the base is formed on the inner peripheral surface of the holding recess. The peripheral side contactor that contacts the outer peripheral electrode provided on the peripheral surface of the base, the bottom side contactor that contacts the tip electrode formed on the front end surface of the base, the peripheral side contactor and the bottom side contactor. It is equipped with a connecting part that connects to the circuit and a pair of spring pieces that are arranged along the inner peripheral surface of the holding recess so as to face each other across the base, and at least one spring piece serves as the peripheral contact. It is characterized by being used in combination.

According to a second aspect of the invention, in the configuration of the first aspect, both spring pieces are integrally connected via a connecting piece. A third aspect of the present invention is characterized in that, in the structure of the first aspect, one spring piece is shared by the peripheral contacts and the other spring piece is separated from the one spring piece.

[0008]

[Action]

 According to the structure of claim 1, since the pair of spring pieces are arranged along the inner peripheral surface of the holding recess so as to face each other with the base sandwiched therebetween, the base is inserted into the holding recess. In this state, the base is held from both sides by both spring pieces, and the lamp can be held so as not to tilt. Furthermore, since both spring pieces are in elastic contact with the mouthpiece, even if the cross-sectional shape of the mouthpiece is deformed into a non-circular shape, the mouthpiece can be rotated within the bending range of both spring pieces, and the holding recess of the mouthpiece The insertability into the place is not impaired.

According to the structure of claim 2, since both spring pieces are integrally connected via the connecting piece, both spring pieces can be treated as one part, and the number of parts can be reduced. This facilitates parts management and reduces the work process. According to the structure of claim 3, since the spring pieces are separated from each other, the material used is small and the material cost can be reduced.

[0010]

【Example】

 (Embodiment 1) As shown in FIG. 1, the lamp socket shown in the present embodiment includes a base 1 on which a cylindrical tubular portion 8 is projected, and a holding recess 8a which is an internal space of the tubular portion 8. The base 11 of the lamp 10 (see FIG. 4) is inserted into the. On the inner peripheral surface of the cylindrical portion 8, a screw receiver 8b that is screwed into a screw portion formed on the peripheral surface of the mouthpiece 11 is formed. The screw receiver 8b has screw threads formed along the inner peripheral surface of the holding recess 8a at four locations in the circumferential direction of the tubular portion 8 over the substantially entire length of the tubular portion 8 in the center line direction. It is formed in a divided shape by 9d. In the pair of groove portions 9a and 9c facing each other, the circumferential side contactors 4a are arranged respectively. Each peripheral contactor 4a is provided along the inner peripheral surface of the holding recess 8a in the direction of the center line of the tubular portion 8. On the other hand, the bottom contact 3a is extended from the groove 9b along the bottom surface of the holding recess 8a toward the center of the holding recess 8a.

As shown in FIG. 2, the lower end portions of the both-side contactors 4a are integrally connected by a connecting piece 4b. A substantially T-shaped lower piece 4c is integrally extended at the center of the lower edge of the connecting piece 4b, and the lower piece 4c is integrally formed with a pair of locking pieces 4d that form terminals together with the lower piece 4c. It Each locking piece 4d is formed in such a shape that the leading edge thereof faces the lower piece 4c after being integrally raised from one end edge of the lower piece 4c and folded back. Further, the locking piece 4d is provided with a connection hole 4e for introducing the electric wire between the locking piece 4d and the lower piece 4c. However, if an electric wire is introduced between the locking piece 4d and the lower piece 4c through the connection hole 4e, the electric wire will be sandwiched between the locking piece 4d and the lower piece 4c, and the tip of the locking piece 4d will be caught. The edge is cut into the electric wire to prevent the electric wire from coming off. The pair of peripheral contacts 4a, the connecting piece 4b, the lower piece 4c, and the locking piece 4d are integrally formed by a sheet metal, and the integrated body is one part as the peripheral receiving member 4.

On the other hand, on the bottom side contactor 3a, as shown in FIG. 3, terminals having the same structure as the terminals provided on the peripheral side receiving member 4 are continuously and integrally formed. The bottom side contactor 3a and this terminal are integrally formed as a bottom side receiving metal 3 by a sheet metal. The bottom side receiving money 3 and the peripheral side receiving money 4 are installed in the base 1. As shown in FIG. 4, the side wall of the base 1 is provided with introduction holes 1e at positions corresponding to the connection holes 4e of the peripheral side receiving metal 4 and the connection holes 4e of the bottom side receiving metal 3, respectively. ing.

Further, as shown in FIG. 4, a holding hole 1d used for attaching to a mounting panel 21 such as an instrument body is vertically provided at an end portion of the base 1. The mounting panel 21 is provided with a mounting piece 21a and a through hole 21b. The base 1 is fixed to the mounting panel 21 by inserting the attachment piece 21a into the holding hole 1d of the base 1 and screwing a screw into the base 1 through the through hole 21b.

When the base 11 of the lamp 10 is screwed into the holding recess 8a, the outer peripheral electrode 11a contacts each peripheral contactor 4a, and the tip electrode 11b contacts the bottom contactor 3a. The contact pressures of the contacts 4a on both sides of the both sides with respect to the base 11 are set to be substantially equal, and the lamp 10 can be mounted without tilting. That is, the contacts 4a on both sides function as spring pieces for holding the lamp 10. Further, since the lamp 10 does not tilt, the insulation distance between the bottom contact 3a and the peripheral contact 4a is maintained. Further, even if the cross-sectional shape of the base 11 is slightly deformed, the deformation of the base 11 should be absorbed within the bending range of the peripheral contact 4a because both the peripheral side contacts 4a have elasticity. Therefore, the insertability of the mouthpiece 11 into the holding recess 8a is not impaired. Moreover, since each terminal of the peripheral side receiving member 4 is disposed so as to face each peripheral side contact 4a, the weight of the peripheral side receiving member 4 is well balanced, and the peripheral side receiving member 4 can be easily supported. Holding the peripheral side receiving plate 4 The work for incorporating the peripheral side receiving plate 4 inside the recess 8a becomes easy.

This lamp socket can be used in a lighting fixture having a circuit configuration as shown in FIG. That is, the lamp 10 mounted in the lamp socket is connected to the power source E via the switch SW ₁ , and the fluorescent lamp 13 is connected to the power source E via the switch SW ₂ and the ballast 12. In this circuit configuration, it is necessary to connect one electrode of the lamp 10 to the power source E and the ballast 12 at two points. However, since a pair of terminals are connected to the peripheral contactor 4a of the lamp socket, the circuit configuration described above can be accommodated.

Second Embodiment The basic configuration of this embodiment is the same as that of the first embodiment, and as shown in FIG. 6, the members functioning as spring pieces are respectively the holding metal 5 and the connecting metal 6. The configuration is different from that of the first embodiment in that only one terminal is provided separately and electrically connected to the outer peripheral electrode 11a.

The holding metal 5 does not have a terminal, and is formed in a substantially J shape in which an end portion of a substantially rectangular sheet metal is folded back, as shown in FIG. The upper portion of the long piece of the holding metal 5 is an abutting piece 5a that comes into contact with the outer peripheral electrode 11a, and a pair of upper engaging claws 5b are provided on both side edges of the lower portion of the abutting piece 5a. Below the upper locking claw 5b, a pair of lower locking claws 5c are provided so as to project. The lower surfaces of the lower locking claws 5c are inclined so that the lower locking claws 5c are closer to each other, and the upper surfaces of the lower locking claws 5c are orthogonal to each other in the vertical direction. When the bent portion of the holding bracket 5 is inserted into the fixing hole 8c formed in the bottom surface of the holding recess 8a from above, the lower engaging claw 5c is inserted into the fixing hole 8c, and both upper engaging claws 5b are inserted. The peripheral portion of the fixing hole 8c is sandwiched between the lower engaging claws 5c, and the holding bracket 5 is fixed to the bottom of the holding recess 8a as shown in FIG.

On the other hand, as shown in FIG. 9, the connection receiving member 6 is provided with a peripheral side contactor 4a that contacts the outer peripheral electrode 11a, and is continuously connected to the terminal of Example 1 integrally from the peripheral side contactor 4a. Terminals of similar shape are formed. The connection receiving member 6 is mounted on the base 1 so that the peripheral side contactor 4a is exposed in the holding recess 8a, and as shown in FIG. 6, the peripheral side contactor 4a faces the contact piece 5a. It is arranged so that. Further, the contact pressures of the peripheral contactor 4a and the contact piece 5a on the mouthpiece 11 are set to be substantially equal. That is, the peripheral contactor 4a and the contact piece 5a function as a spring piece.

In this embodiment, the portion corresponding to one terminal and the connecting piece 4b having the configuration of the first embodiment can be reduced, and the material cost can be reduced as compared with the first embodiment. Other configurations and functions are similar to those of the first embodiment.

[0020]

[Effect of device]

 Since the invention of claim 1 includes the pair of spring pieces arranged along the inner peripheral surface of the holding recess so as to face each other with the base sandwiched therebetween, the base is inserted into the holding recess. In the state, the base is held by each spring piece from both sides, and the lamp can be held so as not to tilt. As a result, there is an effect that the appearance of the lamp in a held state becomes beautiful and the designed light distribution can be obtained. Further, since the base is sandwiched between both spring pieces and both spring pieces are in elastic contact with the base, even if the cross-sectional shape of the base is deformed into a non-circular shape, the base is rotated within the bending range of both spring pieces. Therefore, there is an effect that the insertability of the mouthpiece into the holding recess is not impaired.

According to the second aspect of the invention, since both spring pieces are integrally connected via the connecting piece, both spring pieces can be treated as one part, and the number of parts can be reduced. There are advantages that the parts management becomes easy and the number of working steps is reduced. The invention of claim 3 has the advantage that the spring pieces are separated from each other, so that the material used is small and the material cost can be reduced.

[Brief description of drawings]

FIG. 1 is a plan view of a first embodiment.

FIG. 2 is a perspective view showing a peripheral side receiving metal used in the first embodiment.

FIG. 3 is a perspective view showing a bottom side receiving metal used in the first embodiment.

FIG. 4 is an exploded perspective view showing a usage example of the first embodiment.

FIG. 5 is a circuit diagram showing a usage example of the first embodiment.

FIG. 6 is a plan view of the second embodiment.

FIG. 7 is a perspective view of a holding money used in Example 2 before being attached to a base.

FIG. 8 is a perspective view after attaching the holding money used in the second embodiment to the base.

FIG. 9 is a perspective view showing a connection receiver used in the second embodiment.

FIG. 10 is a plan view of a conventional example.

FIG. 11 is a side view showing a problem of the conventional example.

FIG. 12 is a plan view of another conventional example.

FIG. 13 is a plan view of still another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base 3a Bottom side contactor 4a Circumferential side contactor 8a Holding recess 10 Lamp 11 Base 11a Outer peripheral electrode 11b Tip electrode

Claims (3)

[Scope of utility model registration request] 1. A base having a holding recess into which the base of the lamp is inserted and screwed into a screw portion formed on the peripheral surface of the base, the base being formed on the inner peripheral surface of the holding recess. The peripheral side contactor which contacts the outer peripheral electrode provided on the peripheral surface of the base, the bottom side contactor which contacts the tip electrode formed on the front end surface of the base, the peripheral side contactor and the bottom side contactor are connected to an external circuit. A pair of spring pieces arranged along the inner peripheral surface of the holding recess so as to face each other across the base, and at least one spring piece is also used as a peripheral side contact. Consisting of a lamp socket. 2. The lamp socket according to claim 1, wherein both spring pieces are integrally connected via a connecting piece. 3. One of the spring pieces is shared by the peripheral side contactor,
The lamp socket according to claim 1, wherein the other spring piece is separated from the one spring piece.