JPH0120721Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a simple light, and particularly to a portable light in which a lighting device (lamp) is integrated with a dry battery.

Conventional portable lights use separate dry batteries placed inside a dry battery case that is equipped with a lamp, a reflector, and a switch.

The dry battery is usually constructed by filling a cathode case 2 made of a zinc can or the like as shown in FIG. 3 with a depolarizing mixture 20 and an electrolyte and sealing it. A common and well-known type of dry cell battery is used, in which a battery is inserted and one end thereof is covered with an electrically conductive material and protrudes from the battery. As disclosed in Japanese Utility Model Publication No. 15076/1983, these dry batteries are housed in a dry battery storage case in series, and wiring including the above-mentioned switch and lamp is connected between the anode and cathode of these dry batteries. It is formed separately from the dry battery.

When this portable light is used for a long period of time, poor continuity may occur at the contact points of each electric circuit, and even if new dry batteries are used in an emergency, the light may not emit light.

This is because the circuit from the dry battery to the lamp has many contacts that can be opened, including the electrodes of the dry battery, and conduction failures are likely to occur due to oxidation of these contacts.

The present invention has been made in view of the above points. The power source is a dry battery in which an anode 3 coaxial with the cathode case 2 is provided in a cylindrical cathode case 2 with a bottom. In the simple light in which the lamp 4 is inserted into the electric circuit of The technical challenge is to minimize the number of contact points.

The technical means of the present invention taken to solve the above-mentioned technical problems are as follows. The outer peripheral edge of the reflector is electrically connected and integrated with the upper edge of the cathode case 2 of the dry battery, and a threaded tube 11 is protruded from the center of the reflector 1, and the base 41 of the lamp 4 is attached to the screw tube 11. are screwed together, one pole 42 at the tip of this cap 41 is opposed to the anode 3 of the dry cell battery, the lamp 4 is movable in the axial direction, the one pole 42 can be freely moved toward and away from the anode 3, and this anode 3 and the reflecting mirror 1 are insulated.

The technical means of the present invention works as follows.

The base 41 of the lamp 4 is screwed into the center of the reflector 1, and the peripheral edge of the reflector 1 is electrically connected to the upper end of the cathode case of the dry battery. The electric circuit up to the base 41 is always in a connected state (conducting state).

Therefore, whether or not a conduction failure occurs in the circuit,
Or it becomes extremely unlikely to occur.

On the other hand, the circuit to the anode 3 side of the dry battery is connected to the lamp 4.
The lamp 4 is simply provided with a contact point between one pole 42 of the base 41 and the anode 3, and the lamp 4 is turned off or turned on by opening or closing this contact point.

Since the present invention has the above configuration, it has the following unique effects.

Since the number of contacts that can be connected and separated is only one, poor conduction of the contacts due to oxidation or the like is less likely to occur, compared to the conventional type with a large number of contacts.

Furthermore, since the periphery of the reflector 1 is directly connected and integrated with the cathode case 2 in an electrically conductive state, it is difficult to connect the reflector to the cathode case as described in Japanese Utility Model Publication No. 51-15076. Compared to an electric circuit in which conduction is ensured by press-contacting a large number of members to each other, conduction defects at conductor contact portions of the circuit are less likely to occur.

Further, since the cathode case 2 functions as a casing for a simple light, the cathode case 2 is significantly simpler and cheaper than the conventional one.

Embodiments of the present invention will be described below with reference to FIGS. 1 and 2.

In the first embodiment shown in FIG. 1, the space between the upper end of the anode 3 of the dry battery described above and the open end of the cathode case 2 containing the depolarization mixture 20, etc. is sealed by a reflecting mirror 1. At the same time, this and the anode 3 are insulated, and in order to connect and integrate the peripheral edge of the reflector 1 and the open end of the cathode case 2 in an electrically conductive state, the reflector 1 is insulated from the anode 3. A structure is adopted in which the cathode case 2 is made of a metal material and the joints thereof are caulked by the winding method employed in manufacturing metal containers.

Thereby, the peripheral edge of the reflecting mirror 1 and the open end edge of the cathode case 2 are integrally joined in a tight state over the entire area.

The reflecting mirror 1 is provided with a threaded cylinder 11 at the center, and this threaded cylinder 11 is provided concentrically above the anode 3. Further, in order to ensure insulation between the reflecting mirror 1 and the anode 3, an annular insulating member 3 is fitted over a protrusion 31 formed at the upper end of the anode 3.
0 is interposed between the reflective mirror 1 and the area around the base end of the threaded cylinder 11. Note that this insulating member 30
This is to ensure airtightness of the outer peripheral area of the anode 3.

Further, the thread groove of the threaded tube 11 is made to match the base 41 of the lamp 4.

In this embodiment, a transparent cap 5 is detachably fitted to the upper end of the cathode case 2.
The lamp is turned on and off with the cap 5 removed.

That is, when not in use, the one pole 42 provided at the tip of the base 41 and the anode 3 are kept separated, and the cap 5 is attached in this state.

When in use, the attached cap 5 is removed and the base 41 of the lamp 4 is screwed on. As a result, the one pole 42 and the anode 3 come into contact with each other, and the lamp 4 is inserted into an electrically connected state between the anode 3 of the dry cell battery and the threaded tube 11 that is electrically connected to the cathode case 2 as a cathode. , lamp 4 lights up.

On the other hand, loosen the screw of the base 41 and connect one pole 4.
When the lamp 2 is moved away from the protrusion 31, the electric circuit is cut off and the lamp 4 is turned off.

Next, in the second embodiment shown in FIG. The upper end of the base 41 and the screw tube 11 of the reflector 1
A cylindrical sealing means 43 is also interposed between the outer peripheral portion of the cylindrical member and the outer peripheral portion of the cylindrical member. This sealing means 43 is attached to the lamp 4 when the lamp 4 is turned on and off by screw rotation.
The sealing means 43 allows movement in the axial direction and ensures airtightness of the portion surrounded by the sealing means 43. Further, an antioxidant such as nitrogen gas is sealed in the cavity 7 surrounded by the sealing means 43, the threaded cylinder 11, and the cap 41.

In the second embodiment, even if it is left unused for a long period of time, it is possible to prevent poor conduction due to oxidation of the contact between the cap 41 and the threaded tube 11, compared to the first embodiment. This makes it even more difficult for contact failure to occur.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the first embodiment of the present invention, Fig. 2 is a sectional view of main parts of the second embodiment, and Fig. 3 is a sectional view of a conventionally known dry battery. Mirror, 2...Cathode case, 3...Anode, 4...Lamp, 41...Base, 42...Single pole, 7...Vacant room.

Claims (1)

[Scope of utility model registration request] The power source is a dry cell battery that has an anode 3 coaxial with the cathode case 2 in a cylindrical shape with a bottom, and a lamp 4 is connected to the electric circuit between the anode 3 and the cathode case 2.
In this simple light, the reflector 1 is the closing member that seals the open area between the upper end of the anode 3 and the upper end of the cathode case 2, and the outer periphery of this reflector is the cathode of the dry battery. The upper edge of the case 2 is electrically connected to the upper edge of the case 2, and the threaded barrel 11 is protruded from the center of the reflecting mirror 1.
The cap 41 of the lamp 4 is screwed onto the cap 41.
with one pole 42 at the tip facing the anode 3 of the dry battery,
The lamp 4 is movable in the axial direction so that the one pole 42 can be freely brought into contact with and separated from the anode 3.
A simple light in which the reflector 1 and the reflector 1 are insulated.