JP4075996B2 - Lamp socket and lighting fixture - Google Patents

Description

  The present invention relates to a lamp socket and a lighting fixture using the lamp socket.

A conventional lamp socket includes a socket housing, a sliding body that is movably housed in the socket housing, a contact fitting that is housed in the sliding body and contacts the lamp terminal, and is housed in the socket housing. A connecting portion to which the contact fitting is connected, and a conductive fitting that is locked to the socket housing at the other end, and an engagement hole into which the contact fitting is inserted is provided in the connection portion. At the end of the lamp, when a lamp is mounted, a pair of cut and raised pieces having elasticity in a direction substantially perpendicular to the insertion direction of the lamp terminal and rotating and moving the contact fittings are opposed to each other. The contact metal fitting was clamped by the strip (see, for example, Patent Document 1).
JP-A-8-236231 (page 4, page 5, FIGS. 1 to 4)

  The lamp socket of Patent Document 1 has improved the connection reliability between the contact metal fitting and the conductive metal fitting. However, when the lamp is attached to the lamp socket, the pair of lamp cap terminals, such as when the lamp is tilted, is attached. Of these, the connection reliability between the lamp base terminal and the contact metal fitting that the connection between the one lamp base terminal and the contact metal fitting is ensured but the connection between the other lamp base terminal and the contact metal fitting is insufficient. There's a problem.

The present invention has been made to solve the above-described problems. Even when the lamp is inserted into the lamp socket at an angle, the connection between the lamp base terminal and the contact fitting becomes sufficient, and the connection reliability is improved. The purpose is to obtain a lamp socket.
It is another object of the present invention to obtain a lamp socket that can improve assemblability.

The lamp socket according to the present invention includes a socket housing having an opening on the front surface and an insertion hole into which a cylindrical lamp base protruding from the lamp end is inserted, and the opening of the socket housing And a pair of contact fittings installed on the center side of the insertion hole of the receiver, and a pair of elastically deformable installed on the inner wall in the insertion hole of the receiver A lamp holding member; a conductive member that electrically connects the contact fitting and the external wire; and a mounting portion that is attached to a lighting fixture. The lamp holding member and the contact fitting face each other and are integrally formed. Then, the interval between the pair of lamp holding members is made smaller than the outer diameter of the cylindrical lamp base, and the lamp base is inserted into the insertion hole of the receiving body, so that the cylindrical lamp base A pair of cap terminals on the inner wall Together brought into contact with a pair of contact fittings installed in the center of the insertion hole, the pair of lamp holding member in which elastic deformation, holding the lamp base.

  The lamp socket according to the present invention has an inner wall of a cylindrical lamp base by making the distance between the pair of lamp holding members smaller than the outer diameter of the cylindrical lamp base and inserting the lamp base into the insertion hole of the receiving body. The pair of base terminals are brought into contact with a pair of contact fittings installed on the center side of the insertion hole, and the pair of lamp holding members are elastically deformed to hold the lamp base. The pair of base terminals can be surely brought into contact with the respective contact fittings to improve the electrical connection reliability.

Embodiment 1 FIG.
1 is an exploded perspective view showing a lamp socket according to Embodiment 1 of the present invention, FIG. 2 is a front view of the lamp socket of FIG. 1, and FIG. 3 shows a conductive metal fitting of the lamp socket of FIG. 4 is a cross-sectional view illustrating the connection between the lamp base terminal and the contact fitting when the lamp is mounted on the lamp socket of FIG. 1 and the holding of the lamp base by the lamp holding member, and FIG. It is sectional drawing explaining the state of the electrically-conductive metal fitting and coil spring before and behind lamp mounting | wearing of the lamp socket of FIG.
In these figures, the lamp socket is inserted into the socket body 1 and the socket body 1 from the back side, and the front part protrudes from the front opening 1a of the socket body 1 in the front-rear direction (lamp insertion direction). The receiver 3 is movably attached, a pair of conductive fittings 7 and a pair of coil springs 12 installed between the receiver 3 and the socket cover 5 to urge the receiver 3 forward.

The socket body 1 is made of a synthetic resin, and has an opening 1a on the front side. The socket body 1 is covered with a socket cover 5 from the back side to form a socket housing that forms an accommodating portion.
The receiving body 3 is made of synthetic resin, is inserted into the opening 1a of the socket body 1, and is slidable in the front-rear direction. The receiving body 3 has an insertion hole 3a that opens to the front surface. The lamp cap 11a is inserted. Further, a member having a rectangular cross section when viewed from the front is provided at the center of the insertion hole 3a so as to protrude from the rear portion to form a partition portion 3d. When viewed from the front, the left and right side walls of the partition portion 3d are formed with a contact fitting housing portion 3c formed of a recess for housing the contact fitting 7a of the conductive fitting 7. Further, a lamp holding bracket housing portion 3b comprising a recess for housing a lamp holding bracket 7b, which is a lamp holding member of the conductive fitting 7, on the inner wall of the insertion hole 3a and facing the left and right contact fitting housing portions 3c of the partition portion 3d. Is formed. That is, the pair of contact metal fittings 7a and the lamp holding metal fittings 7b facing each other are accommodated in the respective accommodating portions.

The conductive metal fitting 7 is made of a plate-like conductive member, and is processed by punching and bending as a single piece as shown in FIG. The conductive metal fitting 7 has a generally U-shaped opposed portion in which a dog-shaped contact fitting 7a and a dog-shaped lamp holding fitting 7b are opposed to a dog-shaped bent projection. In addition, a connecting terminal portion 7d having a locking piece 7e for connecting an external electric wire to the lower portion is formed, and these are connected by an L-shaped connecting portion 7c which is a connecting portion. As shown in FIG. 1, a pair of conductive metal fittings 7 are used as a set.
The conductive metal fitting 7 is inserted from the back side of the receiving body 3 in the upper contact metal fitting 7a, and is accommodated in the contact metal fitting housing part 3c of the partition part 3d. At the same time, the lamp holder 7b is also housed in the lamp holder housing 3b. The connecting terminal portion 7d at the lower part of the conductive metal fitting 7 is accommodated in a predetermined accommodating portion at the lower part of the socket housing. And the L-shaped connection part 7c which is a connection part is accommodated in the socket housing | casing between these.

The pair of coil springs 12 is installed between the inner wall on the back side of the socket cover 5 and the receiving body 3 and biases the receiving body 3 toward the front side.
In this manner, the receptacle body 3, the pair of conductive fittings 7, and the pair of coil springs are accommodated in the socket body, and the socket cover 5 is covered from the back side to assemble the lamp socket.

The mounting of the fluorescent lamp to the lamp socket assembled in this way will be described.
4A shows a state before the lamp is mounted, and FIG. 4B shows a state when the lamp is mounted.
The lamp cap 11a of the lamp 11 has a cylindrical shape protruding from the end of the lamp, and has a pair of cap terminals 11c facing the inner side of the outer cap side wall portion 11b. The lamp cap 11a is inserted into the insertion hole 3a of the receiving body 3 so that the pair of cap terminals 11c are separated on both sides by the partition portion 3d. At this time, the contact metal fitting 7a is housed and fixed in the contact metal fitting housing part 3c so that the dog-shaped bent convex part is on the outside, and the lamp-holding metal fitting 7b has the dog-shaped bent convex part on the inner side. The bent holding portions of the contact fitting 7a and the lamp holding fitting 7b are opposed to each other with respect to the partition portion 3d.
Further, the interval between the bent convex portions of the lamp holding metal fitting 7b which is a pair of lamp holding members is made smaller than the outer diameter of the cylindrical lamp base 11a.
Therefore, by inserting the lamp cap 11a into the insertion hole 3a of the receiving body 3, the pair of lamp holding fittings 7b can be elastically deformed to hold the lamp cap 11a, and a pair of inner walls of the cylindrical lamp cap 11a. The base terminal 11c is brought into contact with a pair of contact fittings 7a installed on the center side of the insertion hole 3a. That is, even if the fluorescent lamp is inserted at an angle, both the pair of base terminals 11c reliably contact the contact fitting 7a.
Further, on each side of the partition portion 3d, the distance (gap) between the bent projections of the contact fitting 7a and the lamp holding fitting 7b is set to the inner wall of the base terminal 11c inside the lamp base 11a and the outer wall of the outer base side wall portion 11b. It is made smaller than the distance between them (lamp base thickness). That is, the distance between the contact fitting 7a and the lamp holding fitting 7b in the insertion hole 3a is made small so that the distance between the inner terminal 11c and the outer side wall 11b of the lamp base 11a is reduced. Therefore, when the lamp cap 11a is inserted, the distance between the contact fitting 7a and the lamp holding fixture 7b is widened, and the bent projection of the contact fitting 7a and the bent projection of the lamp holding fixture 7b are elastically held between the lamp fitting 11a. Therefore, the base terminal 11c reliably contacts the contact fitting 7a. That is, even if the fluorescent lamp is bent and inserted, both the pair of caps 11c reliably contact the contact fitting 7a.

  Moreover, the opposing part of the contact metal fitting 7a and the lamp holding metal fitting 7b which is a lamp holding member is formed in one end part, the quick connection terminal part 7d which has the locking piece 7e is formed in the other end part, and both ends are connected parts Are formed in one piece, and the contact fitting 7a and the lamp holding fitting 7b at one end are installed in the insertion hole 3a of the receiving body 3, the connecting portion is housed in the housing, and the other end Is housed in the lower part of the housing, so that the base terminal 11c of the lamp 11 and the external electric wire can be electrically connected by the integrally formed conductive metal fitting 7, and the contact resistance in the case of connecting a plurality of components can be achieved. Problems such as an increase and a decrease in connection reliability can be solved. Moreover, since the integrated conductive metal fitting 7 can be manufactured by cutting and bending, it is easy to manufacture. Furthermore, it is easy to incorporate the integrated conductive fitting 7 into the socket housing, and the lamp socket can be easily assembled.

As shown in FIG. 1, the lamp socket has an attachment portion 8 attached to a lighting fixture at the lower part of the socket cover 5. After the lamp socket is assembled, it is attached to the luminaire by the slit groove of the attachment portion 8. The lighting fixture using this lamp socket is a lighting fixture with high electrical connection reliability of the lamp cap terminal 11c.
FIG. 4B shows a state in which the fluorescent lamp 11 is mounted on the lamp socket. This figure is for explaining a state in which the lamp base 11a is held by the lamp holding metal fitting 7b, and is omitted, but a coil spring. 12 is contracted by the pressure from the lamp 11 when the lamp is mounted. This state is shown in FIG. When the lamp is mounted from the stretched state before the lamp is mounted in FIG. At the same time, the L-shaped connecting portion becomes a vertical body from the upper front inclination.

The conductive metal fitting 7 has been made by processing a conductive metal plate, but it is not limited to a single piece, and a separate part may be connected. The contact metal fitting 7a is connected by a conductive member and is electrically connected to an external electric wire. If you can take. Further, the lamp holding member 7b, which is a lamp holding member, may be a separate non-metal, and is made of an elastic material or an elastic material as a material. When the lamp is mounted, the lamp base 11a is inserted by being elastically deformed. Anything that holds the lamp cap 11a may be used. Further, the contact metal fitting 7a and the lamp holding metal fitting 7b are not limited to the letter-shaped shape, the contact metal fitting 7a is electrically connected to the lamp base terminal 11c, and the lamp holding metal fitting 7b is connected to the lamp base 11a. Anything that can be held is acceptable.
Furthermore, at least a pair of lamp holding fittings 7b, which are lamp holding members, are required to face the inner wall of the insertion hole 3a. By providing two or more, the lamp base 11a can be held more reliably.

  In this lamp socket, the contact fitting 7a and the lamp holding fitting 7b are integrally formed so as to face each other with a conductive material, and the cap terminal 11c is connected to the contact fitting even if this integrated portion is connected to a conductive member connected to an external electric wire. 7a and the lamp cap 11a is held by the lamp holder 7b, so that even if the lamp 11 is inserted at an angle, the pair of cap terminals 11c reliably contacts the respective contact fittings 7a, and the electrical connection reliability Can be improved.

Embodiment 2. FIG.
The lamp socket according to the second embodiment is obtained by partially deforming the conductive metal fitting 7 in the lamp socket according to the first embodiment so that no special member is installed as the lamp holding metal fitting 7b. Since the other configuration is the same as that of the lamp socket of the first embodiment, the difference will be mainly described below.

FIG. 6 shows a pair of conductive metal fittings 7 according to the present embodiment. This conductive metal fitting 7 is integrally formed, but does not have the lamp holding metal fitting 7b. Others are the same as those of the conductive metal fitting 7 of the first embodiment. Further, the contact fitting 7a is accommodated in the contact fitting accommodation portion 3c on the left and right side walls of the partition portion 3d in the insertion hole 3a of the receiver 3. Other attachments to the receiver 3 and the lamp housing are the same as in the first embodiment.
In this lamp socket, the distance between the outermost portions of the pair of contact fittings 7a, that is, the distance between the bent convex portions of the pair of contact fittings 7a in FIG. 6, is defined as a pair of base terminals on the inner wall of the cylindrical lamp base 11a. It is made larger than the interval between 11c. By doing in this way, by inserting the lamp cap 11a into the insertion hole 3a of the receiving body 3, the pair of contact fittings 7a is elastically deformed to hold the lamp cap 11a, and the pair of contact fittings 7a are respectively The cylindrical lamp base 11a comes into contact with a pair of base terminals 11c on the inner wall.
Even if it does in this way, even if the lamp | ramp 11 is inclined and inserted similarly to the lamp socket of Embodiment 1, a pair of cap terminals 11c will contact each contact metal fitting 7a reliably, and electrical connection reliability will be improved. it can.
Further, problems such as an increase in contact resistance and a decrease in connection reliability due to the connection of a plurality of components can be solved, and it is easy to incorporate the integrated conductive metal fitting 7 into the socket housing. It is also the same that it becomes easy. Furthermore, the integrated conductive metal fitting 7 can be manufactured by cutting and bending, and since it does not have a lamp holding metal fitting, it is easier to manufacture. Further, the contact metal fitting 7a, not limited to the U-shape, are the same as in the first embodiment.

It is a disassembled perspective view which shows the lamp socket in Embodiment 1 of this invention. It is a front view of the lamp socket of FIG. It is a perspective view which shows the electrically-conductive metal fitting of the lamp socket of FIG. It is sectional drawing explaining the connection of a lamp cap terminal and a contact metal fitting part at the time of mounting | wearing with the lamp socket of FIG. 1, and holding | maintenance of the lamp cap by a lamp holding member. It is sectional drawing explaining the state of the electrically-conductive metal fitting and coil spring before and behind lamp mounting | wearing of the lamp socket of FIG. It is a perspective view which shows the electrically-conductive metal fitting of the lamp socket in Embodiment 2 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1a Opening part, 3 Receiver body, 3a Insertion hole, 7 Conductive metal fitting, 7a Contact metal fitting, 7b Lamp holding member, 7d Fast connection terminal part, 7e Locking piece, 8 Mounting part, 11a Lamp cap, 11c Lamp cap base terminal .

Claims (3)

A socket housing having an opening on the front surface and an insertion hole into which a cylindrical lamp base protruding from the lamp end portion is inserted at the front, and is movably accommodated in the opening of the socket housing A receiver, a pair of contact fittings installed on the center side of the insertion hole of the receptacle, a pair of elastically deformable lamp holding members installed on an inner wall in the insertion hole of the receiver, and the contact fitting A conductive member that electrically connects the external electric wire, and a mounting portion that is attached to the lighting fixture, the lamp holding members and the contact fittings are opposed to each other, and are integrally formed.
A distance between the pair of lamp holding members is made smaller than an outer diameter of the cylindrical lamp base, and the lamp base is inserted into the insertion hole of the receiving body, whereby a pair of inner walls of the cylindrical lamp base is formed. And a pair of contact fittings installed at the center of the insertion hole, and the pair of lamp holding members are elastically deformed to hold the lamp base.   A contact fitting and a lamp holding member facing one end are formed, a quick connection terminal portion having a locking piece is formed on the other end portion, and the both end portions are integrally formed to be connected by an elastically deformable connection portion. A pair of conductive metal fittings are formed, the contact metal fitting and the lamp holding member at the one end are installed in the insertion hole of the receiver, the connecting portion is housed in the housing, and the other end is placed in the housing. 2. The lamp socket according to claim 1, wherein the lamp socket is housed in a lower part of the body. The lamp fixture according to claim 1 or 2, wherein the lamp socket according to claim 1 or 2 is attached by an attachment portion attached to the lighting fixture.

Images