JPH0110871Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention relates to a screw-in socket such as a starter socket for mounting a screw-in type glow starter.

[Prior art]

Figures 1 and 2 are a perspective view and a plan view showing a screw socket integrally arranged in parallel with the fluorescent lamp socket part 7 shown in Japanese Utility Model Application Publication No. 56-129090. A center contact piece 3 and a side contact piece (not shown) are attached to the inside of the main body 1, which has a screw thread 2 formed on the inner peripheral surface for approximately half the circumference, and an insulating plate is attached to the main body 1 so as to close the back surface of the main body 1. 4 and insulating plate 4
A lid 5 was fixed to the outside of the main body 1, and a screw hole 6 for a base 9 of a glow starter 8 was formed by the inner circumferential surface of the main body 1, the insulating plate 4, and the lid 5.

However, this conventional screw-in socket has the disadvantage that the screw thread 2 of the screw-in hole 6 can be formed only for approximately half a circumference, making the screw-fitting of the glow starter unreliable. Also, attach the cap 9 of the glow starter 8 to the screw thread 2.
When screwed together, due to the action of the inclined portion of the screw thread 2, the screwing force turns into a force that pulls the main body 1 and the lid 5 apart, causing the main body 1 and the lid to open, making the screwing unreliable. . Furthermore, the dimensions of the inscribed circle of the screw hole 6 may overlap due to variations in multiple parts such as the main body 1, the insulating plate 4, and the lid 5, making the screwing of the glow starter uncertain when mass-produced. The problem was that it included factors.

[Summary of the idea]

In this device, a center contact piece and a side contact piece are attached to a main body having an open back surface and a locking part, and a cylindrical screw hole is formed above the center contact piece and the side contact piece. The above-mentioned drawbacks of the conventional method are improved by fitting a screw member having a thread of approximately one pitch on the inner surface of the screw hole and further locking a locked portion provided on the screw member to the locking portion. The purpose of this invention is to obtain a screw-in socket that can be securely screwed into a glow starter, etc.

[Example of idea]

An embodiment of this invention will be described below with reference to FIGS. 3 to 7 regarding a composite socket in which a fluorescent lamp socket and a glow starter socket are integrally formed.

Reference numeral 1 denotes a main body with a rear opening made of synthetic resin, 7 a lamp socket formed in the main body 1, 12 a lamp connection hole formed in the lamp socket 7, and 13 a lamp socket formed in the bottom of the lamp socket 7. 2 lamp side wire connection holes, 15
16 is a starter socket portion integrally formed on the side of the lamp socket portion 7; 16 is a starter side electric wire connection hole formed at the bottom of the starter socket portion 15; and 30 is a starter socket provided on the inner surface of the starter socket portion 15. 17 is a lid attached to the main body 1 so as to close the back surface of the main body 1; 18 is a screw member provided on the lid 17 and fitted into the starter socket portion 15; 6 is a screw member 18; A cylindrical threaded hole 2 is formed on the inner surface of the threaded hole 6, and numeral 2 is a screw thread formed in approximately one pitch on the inner surface of the threaded hole 6, into which the base 9 of the glow starter 8 is screwed. The locking part 21 is the lamp socket part 7 of the main body 1
22 is a lamp contact piece formed on the upper part of the lamp contact fitting 21 and comes into contact with the cap of the fluorescent lamp (none of which is shown); 23 is a lamp contact piece formed at the lower end of the lamp contact fitting 21; Lamp side terminal, 24 is a contact fitting that also serves as a starter, 2
Reference numeral 5 denotes a lamp contact piece formed on the upper part of the starter contact fitting 24 and in contact with the base of the fluorescent lamp;
Reference numeral 6 indicates a side contact piece that contacts the base 9 of the glow starter 8, 27 indicates a center contact fitting mounted below the starter socket portion 15, 28 indicates a starter side terminal formed at one end of the center contact fitting 27, and 29 is a center contact piece formed by bending the center contact fitting 27. 32 is a mounting screw for the lid 17.

In the composite socket constructed as described above, the base 9 of the glow starter 8 is screwed into the screw hole 6 and comes into contact with the side contact pieces 26 and the center contact piece 29. Since the screw hole 6 is formed as one component, there is little variation in the inner diameter, and the screwing of a glow starter, etc. is reliable. Further, the force for screwing together the cap 9 of the glow starter 8 changes into a force for pulling the main body 1 and the screw member 18 apart in the axial direction, but the locked portion 31 of the screw member 18 is attached to the locking portion 30 of the main body 1. Since the screw member 18 is locked, the threaded member 18 will not come up and the threaded engagement will not be reliable.

Further, since the screw thread 2 is formed with approximately one pitch, the screw threading is always reliable.Furthermore, in the above embodiment, since the screw member 18 is integrally formed with the lid 17, the number of parts is small and the structure is simple. Incidentally, in the above embodiment, a socket for a glow starter in a composite socket is shown, but the present invention is not limited to this in any way.

[Effect of idea]

Since this invention is constructed as described above, it has the effect of providing a screw-in socket that can be securely screwed into a glow starter or the like.

[Brief explanation of the drawing]

1 and 2 show a conventional composite socket, FIG. 1 is a perspective view, FIG. 2 is a plan view, and FIGS. 3 to 7 show a composite socket that is an embodiment of this invention. Figure 3 is a perspective view, Figure 4 is an exploded perspective view,
FIG. 5 is a rear view showing a state with the lid removed, FIG. 6 is a plan view, FIG. 7 is a sectional view of main parts, and FIG. 8 is a front view showing the glow starter. In the figure, 1 is the main body, 2 is the screw thread, 6 is the screw hole, 1
7 is a lid, 18 is a screw member, 26 is a side contact piece, 2
9 is a center contact piece. In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A main body with an opening on the back and a locking part, a center contact piece and side contact pieces installed inside this main body, and the center contact piece and side contact pieces. A screw member is provided with a locked part that is locked with the locking part in the upper part, a cylindrical screw hole, and a screw thread formed with approximately one pitch on the inner surface of the screw hole, and the back surface of the main body is closed. A screw-in socket characterized by being equipped with a lid. (2) The screw socket according to claim 1, wherein the screw member and the lid are integrally formed.