JPH019339Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improved and created discharge lamp socket for a show case.

The discharge lamp used for this show case has a double structure with an airtight seal at the connection point between the socket and the discharge lamp for waterproofing, and a protective cover covering the discharge lamp to provide heat insulation and explosion protection. It was necessary to attach it while maintaining its properties, and it was also necessary to seal the lead-out hole with paint for the wire drawn out from the socket.

In order to satisfy these conditions, some holders have been manufactured and used from waterproof and highly elastic materials, but these are simply constructed to satisfy the above conditions, and there are no special considerations regarding the sockets used. Since it has not been improved, the holder is configured to be attached to a ready-made socket, and the holder itself is therefore large, which is uneconomical in terms of material usage and inconvenient to use. Ta. (Refer to Japanese Utility Model Publications No. 56-5763 and No. 56-7041.) The present invention is constructed as follows to ensure airtightness of the socket, discharge lamp, and protective cover, and also airtightness of the lead wire hole.

A bottomed cylinder is molded from a highly waterproof material such as rubber or synthetic rubber (silicon type), and placed on the outer periphery of the bottomed cylinder at a position close to the bottom of the bottomed cylinder (at a distance corresponding to the thickness of the socket). A flange is molded, and the outer circumferential surface of the flange is formed to be tapered toward the opening side of the bottomed cylinder to form a socket case.A step to stop the rotation of the socket is molded on the bottom surface of the bottomed cylinder, and a pair of grooves are formed on the outer periphery. A lead wire pull-out hole is drilled, and the socket that accommodates the lead wire can be fixed with rivets, etc. to the cover plate, which has a pair of pin insertion holes drilled in the opening of the case with a thickness corresponding to the length of the pin of the discharge lamp. Inside the case, a conductive spring material is folded in half, and at the center of the two pieces, a pin insertion guide is formed into an umbrella-shaped contact piece, which is fitted and held in a holding groove formed inside the case. The guides are aligned with the pin insertion holes, pin protrusion holes are drilled in the bottom of the case at positions corresponding to the center line passing through the pin insertion holes and the guides, and a pair of holes are provided for the lead wires connected to the contact pieces. A hole is formed in the case, and a notch is formed on the outer periphery of the case to prevent rotation.

The case is housed in a socket case, the lead wire is drawn out through the lead-out hole, and the stepped portion and the cutout are aligned to prevent rotation, thereby constructing a discharge lamp for a socket case.

A pair of the above-mentioned discharge lamp sockets are prepared.The discharge lamp is press-fitted into the show case, the pin is inserted into the guide of the contact piece through the pin insertion hole, the pin is held by the spring pressure of the contact piece, and the length of the pin is the same as that of the socket. If it is longer than the thickness, the pin protrudes out of the socket case through the pin protrusion hole to adjust the pin length error and ensure a secure connection between the discharge lamp and the socket.

Next, the protective cover is applied from the other end of the discharge lamp, and the covered end is press-fitted into the flange molded on the outer periphery of the socket case according to the taper of the outer peripheral surface, and in the same way, the other end of the discharge lamp and protective cover is covered. also connect to the socket.

As described above, in the case of the present invention, the thickness of the socket is approximately the same as the length of the pin of the discharge lamp, so the length of the socket case that accommodates it can be shortened, which is extremely beneficial in terms of saving materials. In addition, since the socket allows the lead wire to be pulled out from the socket through the pull-out hole drilled in the socket case, the lead wire is drawn out into the pull-out hole because the pull-out hole is made smaller in diameter than the outer diameter of the lead wire. It is possible to ensure complete airtightness by attaching the

Further, since the socket is housed in a socket cover and the discharge lamp is connected inside the cover, the socket is highly airtight and completely eliminates electrical failures such as ignition failures caused by moisture condensation.

In addition, when attaching the protective cover, the socket case becomes rigid due to the discharge lamp housed in the socket case, with the discharge lamp as the core, and the opening of the protective cover is press-fitted into the tapered surface of the flange that protrudes from this, like a bottle stopper. This has the advantages of easy installation and high airtightness.

Therefore, the discharge lamp socket of the present invention is advantageous in that it can save materials compared to the above-mentioned conventional holder, and at the same time is easy to install and can completely ensure three-point airtightness between the discharge lamp, protective cover, and lead wire. This is a practical idea.

Embodiment The socket case a is made of silicone-based synthetic rubber.

The shape of the case is the inner diameter of the discharge lamp LP
It consists of a bottomed tube 1 with a diameter slightly smaller than the outer diameter of the bottomed tube 1, and a flange 2 is overhang molded on the outer periphery at a position spaced apart from the bottom surface of the bottomed tube 1 by a distance corresponding to the thickness of the socket b.
The outer peripheral surface of the flange 2 is formed into a taper 3 toward the opening side of the bottomed cylinder 1, and the outer diameter of the flange 2, especially near the end of the taper 3, is equal to or slightly smaller than the inner diameter of the protective cover LK to be used. Exhibits a small outer diameter.

A part of the circular arc is buried in the inner bottom surface of the bottomed cylinder 1 to form a semi-arched step a1 on the front surface, which is used to stop the rotation of the socket.

A pair of extraction holes 4 for the lead wire L are provided on the outer periphery of the bottomed tube 1 at both ends of the stepped portion a1.
The diameter of the lead wire is smaller than that of the lead wire.

The socket b is configured such that a cover plate 12 having a pair of pin insertion holes 11 formed in the opening of a case 10 having a thickness equal to the length of the pin of the discharge lamp LP can be fixed with rivets or the like.

A contact piece c is fitted into a holding groove 14 and held in the case 10, and a lead wire L is connected to each contact piece c.

The contact piece c is made by folding a conductive spring material, for example, a phosphorescent copper metal material in half, and a pin insertion guide 13 is formed in the center of the two-fold seam in an open umbrella shape, and the guide 13 and the pin insertion hole 11 are aligned. Place it.

A pin protrusion hole 15 is located at a position where the center line passing through the pin insertion hole 11 and the guide 13 hits the bottom plate of the case 10.
The bottom plate is further provided with a notch b1 that fits the step a1 of the socket case a, and a pair of lead wire extraction holes 16 are bored in the case 10 at both ends of the notch b1. The lead wire L is drawn out from 16 to the outside.

Before inserting the socket b into the socket case a, the lead wire L should be pulled out from the draw-out hole 4 of the socket case a, or in some cases, the lead wire L should be inserted into the draw-out hole 4 of the socket case a, and the tip of the socket b should be pulled out from the draw-out hole 4 of the socket case a. It may also be connected to socket b.

When the lead wire L is drawn out, the socket b is accommodated in the socket case a, and the notch b1 of the socket b is aligned with the stepped portion a1 of the socket case a to form a discharge lamp socket.

To use the above discharge lamp socket, press-fit the discharge lamp LP into socket case a, and insert the pin into pin insertion hole 1.
1 into the guide 13, and is held in pressure contact by the contact piece c.

If the length of the pin of the discharge lamp LP is longer than the thickness of the socket due to an error, the pin end can protrude out of the socket through the pin protrusion hole 15 in the socket bottom plate, so that the error in the length of the pin can be adjusted.

When one side of the discharge lamp LP is connected to the socket, the protective cover LK is then placed over the other side of the discharge lamp, and the end of this is press-fitted into the three tapered surfaces of the collar 2 of the socket case a, the protective cover LK is attached, and then Attach the discharge lamp socket to the other side of the discharge lamp and protective cover in the same way, connect the L end of the lead wire to the discharge lamp starting circuit installed at the required location (outside the show case), and connect the discharge lamp to the required position inside the show case. It is to be attached to.

In this embodiment, the discharge lamp LP, the protective cover LK, and the lead wire L are connected to each other in a completely airtight manner through the socket cover, so that electricity such as malfunction of the discharge lamp due to condensation of moisture or cooling of the discharge lamp may occur. It is possible to completely eliminate mechanical failures.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing the socket of the present invention before installation, Fig. 2 is a front view of the same socket cover;
Figure 3 is a side view of the socket cover, Figure 4 is a front view of the socket case, Figure 5 is a rear view of the socket case, Figure 6 is a sectional view showing the socket case installed, and Figure 7 is the socket case before assembly. FIG. 8 is a perspective view of the same contact piece. In addition, the symbols in the figure are: a... Socket cover, 1... Bottomed tube, 2... Flange, 3... Taper, 4... Lead wire extraction hole, a1... Socket rotation stopper step, b... Socket, 10... Case, 11... Pin Insertion hole, 12...cover plate, c...contact piece, 13...guide, b1...notch.

Claims (1)

[Claim for Utility Model Registration] The bottomed tube 1 is molded from a waterproof and highly elastic material such as rubber, and the inner diameter of the bottomed tube 1 is slightly smaller than the outer diameter of the discharge lamp LP used. A flange 2 is over-molded at a position spaced apart from the bottom surface of the bottomed tube at a distance corresponding to the thickness of the socket to be housed on the outer periphery of the bottomed tube 1, and the outer circumferential surface of the flange 2 extends over the opening of the bottomed tube 1. It is formed into a taper 3 toward the side, and the outer diameter of the tapered end is made a small diameter that is slightly smaller than the inner diameter of the protective cover LK to be used, and it is made into the inner bottom surface of the bottomed cylinder 1 and fills a part of the inner circumferential arc. A socket rotation stopper step a1 having a substantially semi-arched front surface is formed, and a pair of lead wire pull-out holes 4 are bored at both ends of the step, and the diameter of the lead wire draw-out hole 4 is smaller than the diameter of the lead wire L. A show case characterized in that the socket case a is formed by molding to a small diameter, the socket b described in (a) below is housed in the socket case a, and the lead wire L is drawn out from the extraction hole 4 outside the socket case. discharge lamp socket. (a) The thickness of the case 10 is made approximately equal to the length of the pin of the discharge lamp LP to be used, and a cover plate 12 having a pair of pin insertion holes 11 is fixed to the front opening of the case 10, Inside the case 10, a contact piece c made by folding a conductive spring material in half and molding a pin insertion guide 13 in the center part is fitted and held in a holding groove 14 formed inside the case. Connect the lead wire L, drill a pin protrusion hole 15 in the case bottom plate at a position corresponding to the pin insertion hole 11, make a notch b1 on the outer periphery of the case bottom plate that matches the step a1 of the socket case a, and b1
A socket b has a pair of holes 16 for drawing out the lead wire L on the outside of both ends thereof.