JPH01220366A - Electric lamp exchanging tool - Google Patents

Abstract

PURPOSE:To facilitate the fitting and removal of an electric lamp by utilizing the portion with a noncylindrical cross section located near the socket screwing metal of the halogen electric lamp, bringing a pair of springy holding tools facing each other and provided at the tip of a support bar into contact with it, and moving it downward with the holding tools after the screwing of the electric lamp is completed. CONSTITUTION:A pair of springy holding tools 22 facing each other are fitted at the tip section of a long support bar 21 with a fixing pin 23. Tips of the holding tools 22 are folded inward respectively in response to the noncylindrical portion below the screwing metal 1d of an electric lamp 1, these portions are used as coupling pieces 22c and brought into contact with the noncylindrical portion below the screwing metal. A pair of tip holding pieces 22e to be brought into slide contact with the lower cylinder section of the electric lamp 1 are provided at the bottoms of the holding tools 22. An electric lamp exchanging tool 20 is thus constituted, the electric lamp 1 is grasped with the coupling pieces 22c and holding pieces 22e, the electric lamp 2 is screwed into a socket, the coupling pieces 22c and holding pieces 22e are freely rotated after the screwing is completed, the support bar 21 is lowered, the coupling pieces 22c and holding pieces 22e are removed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a light bulb replacement tool for attaching and detaching a light bulb such as a halogen light bulb to and from a socket.

(Prior Art) Conventionally, when a light bulb such as a halogen light bulb screwed into a socket attached to the ceiling of a room burns out, the process of removing the burnt-out bulb from the socket and installing a new bulb is usually as follows: A person stands on a stepladder and holds a light bulb in his hand.

However, it is inconvenient and dangerous to attach or detach a light bulb that is located in a location such as the ceiling that cannot be reached by regular people.

In addition, regardless of whether it is within reach or not, bulbs are hot immediately after they burn out, and some bulbs, such as halogen bulbs, heat up immediately after they are installed, creating a risk of burns. . In this case, for example, in the case of store lighting bulbs, there are cases where it is not possible to wait until the burnt out bulb cools down or turn off the power before installing a new bulb.

In view of the above situation, a light bulb changing tool has been devised that eliminates the need to hold the light bulb directly by hand.

Figures 6A and 6B show a front view and side view of a halogen light bulb as an example of a light bulb that can be inserted into and removed from a socket, and Figure 7 shows the halogen light bulb shown in Figures 6A and 6B. FIG. 8 is a cross-sectional view showing an example of a socket into which the light bulb is screwed. FIG. 8 is a cross-sectional view of a conventional light bulb replacement tool used for attaching and detaching the halogen light bulb shown in FIGS. 6A and 6B. The conventional example shown in FIG. 8 will be explained using these figures.

A conventional light bulb replacement tool shown in Figure 8
O consists of a plastic cylinder 11 and a rubber holder 12 fixed to one end of the cylinder.
The halogen bulb 1 is inserted into the center of the socket 2 and held by the elasticity of the rubber, and the cylinder 11 is held by hand and rotated to be attached to and removed from the socket 2.

In addition, in order to attach and detach the light bulb 1 to the socket 2 attached to the ceiling etc. using this light bulb exchanger 10, the hole 3 provided in the cylinder 11 is used to insert another elongated cylinder (not shown). )
was connected to the cylinder 11, and the other end of the long cylinder was held.

(Problem 8 to be solved by the invention) The conventional light bulb changing tool 10 described above has a holder made of rubber, so
The glass tube 19 of the light bulb 1 can be held by the elasticity of rubber, and the light bulb can be easily inserted into and removed from the holder 2, and the cylinder 11 can be rotated to easily be attached to and removed from the socket 2.

However, some light bulbs, such as halogen light bulbs, have a glass tube 1a that reaches a very high temperature immediately after the light starts to turn on and for a while after the light is turned off. There are also light bulbs that are used while blowing air with a fan.

A light bulb replacement tool shown in Figure 8 is used to replace light bulbs that reach such high temperatures.
When the bulb was replaced using O, the portion of the rubber holder 12 that came into contact with the light bulb melted, and the diameter of the hole 12a expanded. Therefore, when screwing the light bulb 1 into the socket 2 using the light bulb changing tool IO, even if the light bulb 1 is firmly held in the hole 12a of the holder 12 and the light bulb 1 is firmly screwed into the socket 2. Regardless, when removing the light bulb 1 screwed into the socket 2, the hole 12a of the holder 12 warps a little and the holding force weakens, making it impossible to remove the light bulb firmly screwed into the socket. There were times when the exchanger lO would spin idly. Moreover, if the diameter of the hole 12a further increases, the socket 2
It became impossible to fully screw in the light bulb 1. For this reason, this light bulb replacement tool IO was considered to be a consumable item.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a light bulb replacement tool that is durable and allows a light bulb to be reliably attached to and removed from a socket.

(Means for Solving the Problems) The light bulb replacement tool of the present invention has a male screw screwed onto a socket at one end, and a holder for holding a light bulb having at least a non-cylindrical cross section is attached to a support rod. A light bulb changing tool is provided at one end and the light bulb is attached to and removed from the socket by rotating the support rod, wherein the holding tool is a metal fitting that fits into a non-cylindrical cross section of the light bulb with a spring force. When the light bulb held in the holder is screwed into the socket, the light bulb replacement tool idles when the screwing load reaches a predetermined value, and the light bulb screwed in the socket is screwed into the holder. The shape of the fitting portion and the spring force are determined so that the light bulb exchanger is prevented from idling even under a load exceeding the predetermined value when being held and removed from the socket.

(Function) The light bulb replacement tool of the present invention focuses on the fact that many light bulbs such as halogen light bulbs have a non-cylindrical cross-sectional shape at least in part, and the holder provided at one end of the support rod It has a fitting part that fits into the non-cylindrical cross section of the bulb, and when the bulb is screwed into the socket, when the screwing load reaches a predetermined value, the bulb replacement tool will idle and the bulb will not be screwed into the socket. When removing the light bulb, the shape and spring force of the above-mentioned fitting part are determined so that the light bulb replacement tool is prevented from idling even under a load that exceeds the above-mentioned predetermined value, so the above-mentioned predetermined value is set to an appropriate value. By doing so, by rotating the support rod, the light bulb held in the holder can be reliably screwed into the socket, and the light bulb screwed into the socket can be reliably removed. Furthermore, since the fitting part is made of metal, the bulb will not melt even if it gets hot, and can be used semi-permanently. Furthermore, since the fitting portion fits into the light bulb with a spring force, the light bulb can be easily inserted into and removed from the holder.

(Example) Hereinafter, preferred examples of the present invention will be described with reference to the drawings.

The light bulb replacement tool of the present invention focuses on the fact that, as described above, most light bulbs have a non-cylindrical cross section at least in part. 6A and 6B are front views, respectively, of an example of a halogen light bulb having a partially non-cylindrical cross section;
FIG.

The part of the glass tube 1a that contains the filament lb and emits light has a cylindrical cross section.
The vicinity of the base 1c has a substantially rectangular cross section. Also,
One end of the light bulb 1 is provided with a male screw 1d that is screwed onto a socket 2 (see FIG. 7). The light bulb replacement tool of the present invention is thus provided with a male thread at one end to be screwed into the socket, and is used when a light bulb having at least a portion of a non-cylindrical cross section is attached to and removed from the socket.

FIG. 1A and FIG. 1B are front sectional views showing an embodiment of the light bulb replacement tool of the present invention, respectively, in a state where a light bulb 1 is held and a state where the light bulb 1 is inserted halfway.

This light bulb replacement tool 20 includes a support rod 21 and a holder 22 provided at one end 21a of the support rod 21. - The second holder 22 has a fitting part 2 which has a non-cylindrical cross section and which fits into the vicinity 1e of the base of the glass tube 1a of the light bulb 1.
2a is provided. Further, the base of this holder 22 is fixed to the support rod 22 by a fixing pin 23. Two walls 22b rise from the vicinity of the fixing pin 22,
From the tip of this wall portion 22b, two fitting pieces 22c constituting the fitting portion 22a extend toward the inner side sandwiched by the wall portion 226 and toward the support rod 21 side.

These two fitting pieces 22c are located near the base of the light bulb 1.
At the position where they are fitted, they face each other with a gap 22d having a predetermined shape as described later. Furthermore, the wall portion 22b and the fitting piece 22c have a spring force, and therefore,
As shown in FIG. 1B, a gap 22d is provided depending on the shape of the light bulb 1.
Since the light bulb 1 is expanded, the light bulb 1 can be easily inserted into and removed from the holder 22. Further, when the light bulb 1 is inserted into the holder 22, a tip holding piece 2 is placed on the inner side sandwiched between the wall portions 22b and in contact with the vicinity of the tip 1e of the light bulb 1 so that the light bulb does not wobble.
2e is attached.

In this embodiment, the entire holder 22 is made of metal, but since the tip holding piece 22e is not necessary, it is sufficient that the fitting part 22a that contacts the light bulb 1 is made of metal.

However, when the tip holding piece 22e is provided as in this embodiment, this tip holding piece 22e also needs to be made of metal.

FIG. 2 shows that the light bulb 1 is screwed into the socket 2 attached to the ceiling 5 via the fixture 4, integrally with the light bulb shade 3, using the light bulb changing tool 20 shown in FIGS. 1A and 1B. FIG. By holding the support rod 21 near the other end 21b, which is different from the one end 21a to which the holder 22 is attached, by hand, and rotating the support rod 21, the holder 22 can be removed.
The light bulb 1 held in the socket 2 is screwed into the socket 2.

Incidentally, since the support rod 21 can have any thickness, one having a thickness that is easy to work with is used. Also, support rod 2
1 does not necessarily have to be long, and the light bulb replacement tool 20 can also be used when screwing a light bulb into a socket at hand, such as when the light bulb becomes hot the moment it is attached.

Therefore, the support rod 21 may be changed from a short length to a long length, such as a fishing rod, depending on the purpose.

FIGS. 3A to 3D show an example of the shape of the gap 22d of the fitting part 22a shown in FIG. FIG. 6B is a diagram showing a substantially rectangular cross section tr of FIG. 6B).

When screwing the light bulb 1 into the socket 2, the light bulb 1 is attached to the holder 22.
While the light bulb 1 is being held in the direction of arrow A and the support rod 21 is rotating, the third
As shown in Figure A, the gap 22d is kept narrow. When the screwing of the light bulb 1 into the socket 2 is completed, the light bulb 1 will no longer rotate, and only the light bulb holder 20 will continue to rotate in the direction of arrow A, and as shown in FIG. 3B, the fitting part 22a will be removed. The gap 22d widens, and finally, as shown in FIG. 3C, the light bulb 1 becomes relatively approximately 90 degrees compared to FIG. 3A.
It will be in a rotating state.

The operator can sense this 90'' rotation by the touch transmitted through the support rod 21, but the shape of the gap 22d (the shape of the fitting piece 22c) must be adjusted to positively create a click feeling. may be determined.

Similar to FIG. 1A, FIG. 4 is a front sectional view showing an example of the light bulb replacement tool 20 with the light bulb 1 held therein.
Compared to FIG. 1A, the held light bulb 1 has rotated by 90 degrees relative to the light bulb replacement tool 20.

After screwing the light bulb 1 into the socket 2, in order to remove the light bulb 1 from the light bulb exchanger by pulling the support rod 21 downward in the figure with the gap 22d narrow as shown in FIG. Since the gap 22d needs to be widened once during the process,
It takes some force to pull the support rod 21, which puts a load on the socket 2 and male screw ld, but as shown in Fig. 4, the light bulb 1 is rotated 90@, and the gap 22d is opened. By removing the light bulb 1 in this state, the light bulb 1 can be removed with less resistance, and no load is applied to the socket 2 or the male screw 1d.

FIG. 3D is a diagram showing a state when the light bulb 1 screwed into the socket 2 is removed. After the light bulb 1 is screwed into the socket 2, there may be some rust on the connection between the socket 2 and the light bulb 1, so if the light bulb 1 is not turned with strong rotational force, the light bulb 1 will not be removed from the socket 2. There may be cases where it cannot be removed.

When the light bulb replacement tool 20 is rotated in the direction of arrow B shown in FIG. 5D, the fitting piece 22c shown in FIGS. 5A to 5D has a
A wall portion 22g is provided with which a portion of the rectangular cross section tr comes into contact and provides a large resistance to the opening of the gap 22f. Thereby, even if the light bulb 1 is tightly screwed into the socket 2, the light bulb 1 can be removed from the socket 2.

5A to 5D show the gap 2 surrounded by the fitting piece 22c.
It is a figure showing other examples of the shape of 2d. Figure 3A-3
Corresponding parts in FIG. D and FIGS. 5A to 5D are designated by the same numbers, and explanations thereof will be omitted.

(Effects of the Invention) As explained above in detail, the light bulb replacement tool of the present invention is such that the holder provided at one end of the support rod is made of metal that fits into the non-cylindrical cross section of the light bulb with spring force. When the light bulb is screwed into the socket, the light bulb replacement tool will idle when the screwing load reaches a predetermined value, and when the light bulb screwed into the socket is removed, the light bulb replacement tool will rotate at the above predetermined value when the light bulb is screwed into the socket. Since the shape and spring force of the fitting part are determined so that the light bulb changing tool is prevented from idling even under a load exceeding , the light bulb screwed into the socket can be reliably removed. Additionally, even if the bulb gets hot, it will not emit any melt and can be used semi-permanently. Furthermore, the light bulb can be easily inserted into and removed from the holder.

[Brief explanation of the drawing]

1A and 1B are front cross-sectional views showing one embodiment of the light bulb changing tool of the present invention, and FIG. 2 is a front sectional view showing an embodiment of the light bulb changing tool of the present invention. Figures 3A to 3D, which show how the light bulb 1 is screwed in, show an example of the shape of the gap in the fitting part shown in Figure 1A, and a substantially rectangular cross section of the light bulb fitted into this gap. FIG. 4 is a front sectional view showing an example of a light bulb replacement tool in which the light bulb 1 is held in a different direction from that shown in FIG. 1A, and FIGS. 5A to 5D are Figures 6A and 6B are front and side views respectively showing an example of a halogen light bulb, and Figure 7 is a diagram showing other examples of the shape of the gap at the joint. Figures 6A and 6B are cross-sectional views showing an example of a socket into which the light bulbs are screwed, and Figure 8 is a cross-sectional view showing a conventional example of a light bulb exchanger. 1...Halogen light bulb 2...Socket 3...Light bulb shade 4...Installation
Tool 5...Ceiling 10.20...Light bulb replacement tool 21...Support rod 22...
・Holding tool 22a...fitting part 22b...
Part 22c...Fitting piece 22d...Gap 22e...Tip holding piece Fig. 18 3 Al missing! 1f 22Q Fig. 5A Fig. 6A Fig. 71'X1 No. 68 dollar l Fig. 8

Claims (1)

[Claims] A holder is provided at one end of a support rod for holding a light bulb having a non-cylindrical cross section at least in part, and is provided with a male thread at one end to be screwed into a socket, and by rotating the support rod. In the light bulb replacement tool for attaching and detaching the light bulb to the socket, the holder includes a metal fitting part that fits into a non-cylindrical cross section of the light bulb with a spring force, and the holder is held by the holder. When the light bulb is screwed into the socket, when the screwing load reaches a predetermined value, the light bulb replacement tool idles, and the light bulb screwed into the socket is held in the holder and removed from the socket. A light bulb replacement tool, characterized in that the shape of the fitting portion and the spring force are determined so that the light bulb replacement tool is prevented from idling up to a load exceeding the predetermined value when removed.