JPS6230241Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a portable electric lamp.

Conventionally, electrical wiring from the switch part of a portable light bulb to the light bulb is carried out by contacting a conductive lead plate from the switch part to a reflector that is electrically connected to the light bulb, as disclosed in, for example, Japanese Utility Model Publication No. 40-25826. was common.

However, in such a structure, the contact pressure at the contact portion is weak and unstable, which tends to cause poor conduction. Furthermore, when replacing a light bulb or battery, when removing the reflector or lens frame, the operator may accidentally touch the lead plate, causing deformation such as twisting or distortion of the lead plate. , which caused poor continuity.

Furthermore, as disclosed in Japanese Utility Model Publication No. 43-23350, if the free end of the lead plate protrudes from the battery case opening and no fixing means is provided, the lead plate can be easily moved by the operator. Even if you are not careful, it can easily become deformed, resulting in poor conduction. These conduction defects have significantly reduced the reliability of portable lamps.

On the other hand, in terms of manufacturing costs, the switch structures disclosed in the above-mentioned publications require a large number of parts, such as the use of rivets to fix the parts, and the process is complicated, which is not desirable.

This idea was made in view of the above-mentioned circumstances.
The present invention aims to eliminate deterioration in reliability due to poor conduction, thereby obtaining a highly reliable portable lamp, and also to reduce manufacturing costs by reducing the number of parts and manufacturing steps.

The portable electric lamp of the present invention includes a body tube having a cylindrical shape with a bottom, a head tube communicating with the body tube and having an inclined inner wall that becomes larger in diameter as it moves away from the body tube, and the body tube and the head tube. It has a lead plate made of an elastic conductive plate disposed across the head tube, and a socket that is disposed in the head tube and has a power supply terminal that can contact the lead plate and holds a light bulb. , a protrusion is formed on the inner wall of the boundary between the body tube and the head tube, an insertion hole is formed in the body tube, and an insertion hole is formed in the lead plate in the center thereof through which the protrusion is inserted. and a bent piece that is inserted and fixed into the insertion hole at its base end, and the free end of the lead plate is formed at the top of the protruding piece against the elastic force of the lead plate. The present invention is characterized in that a latching protrusion is formed for latching the edge of the insertion hole so as to hold the insertion hole in a state substantially parallel to the inclined inner wall.

By configuring the portable light as described above, the contact pressure of the power supply part from the lead plate to the bulb socket becomes stronger, the deformation of the lead plate becomes less likely to occur, and the structure from the switch to the power supply part becomes stronger. Simplified.

Embodiments of the portable electric lamp of the present invention shown in the drawings will be described below.

1 consists of a bottomed cylindrical body tube 2 and a head tube 4 which communicates with the body tube 2 and has an inclined inner wall 3 which becomes larger in diameter as it moves away from the body tube 2. This is a hollow synthetic resin battery case with an opening 5 in the head of the cylinder 4, and a recess 6 for the switch knob to slide on the surface of the body cylinder 2 of the battery case 1.
is recessed therein, and the recess 6 has an elongated hole 7 in the center thereof, and first and second insertion holes 8a and 8b are provided in front and behind the elongated hole 7, respectively. A projecting piece 10 is provided on the inner wall of the boundary between the cylinder 2 and the head cylinder 4. Furthermore, a locking protrusion 9 facing the opening 5 is formed on the protruding piece 10 .

Reference numeral 11 denotes a first lead plate made of an elastic conductive plate material, and near its tip, there is an articulated protrusion 11a and a first bending piece 13 that is inserted into the first insertion hole 8a and bent. The other end is in elastic contact with the negative electrode side of the battery 12 housed in the battery case 1 through the opening 5.

Reference numeral 14 denotes a second lead plate made of an elastic conductive plate material, and has an insertion hole 15 bored in its center and a second bent piece 16 cut and raised at its base end. The protruding piece 10 is inserted into the insertion hole 15 of the lead plate 14, and the protruding piece 10 is attached to the edge of the insertion hole 15.
The second bent piece 1 is latched by the latching protrusion 9 and further bent while maintaining elasticity at the bent portion 14b.
6 is inserted into the second insertion hole 8b and bent and locked. That is, the second lead plate 14 is connected to the body tube 2.
and the latching protrusion 9 which is disposed astride the head cylinder 4.
As a result, the second lead plate 14 is held substantially parallel to the inclined inner wall 3 against the elastic force of the second lead plate 14 itself. Therefore, the free end 14a faces the opening 5 in a state that is slightly raised from the inner wall 3.

Reference numeral 17 indicates a switch contact plate made of an elastic conductive plate that constantly slides on the tip of the first lead plate 11 and also contacts and separates from the base end of the second lead plate 14 for on/off operation; A name plate is placed on the stepped portion 6a at a distance from the first and second contact pieces 13 and 16, and 19 is a switch knob having a leg 21 having a hook 20 at the tip;
Loosely insert the leg 21 into the long groove hole 7 of the battery case 1 through the loose elongated hole 22 of the name plate 18, insert it into the knob hole 23 of the switch ground plate 17, and insert the leg 21 around the periphery of the knob 23. A slide switch mechanism is constructed by hooking the hook 20.

24 is a socket, and the socket 24 is a light bulb 25.
A metal light bulb receiver 2 to which a peripheral terminal is screwed and attached.
6, and a resin socket plate 2 for fixing the receiving tube 26.
7, one end 28a protrudes from the socket plate 27, and the other end 28b extends from the socket plate 27 surface 27.
a power supply terminal 28 made of an elastic conductive plate, which is led out to the receiving tube 26 and attached to the socket plate 27;
Then, move the socket plate 27 from the front surface 27a to the back surface 27.
The socket 24 is inserted into the head cylinder 4 of the battery case 1 from the opening 5 and a central terminal 29 is buried through the terminals 1 and 2 to connect the tail terminal of the light bulb 25 and the positive electrode of the battery 12. The power supply terminal 28 is arranged so that one end 28a of the power supply terminal 28 comes into elastic contact with the free end 14a of the second lead plate 14.

30 is a reflecting mirror, and 31 is a lens frame that holds the lens 32 and is screwed and fixed into the opening 5 of the battery case 1.

Therefore, the assembly of this portable electric lamp is carried out as follows. First, after storing the battery 12 in the battery case 1, insert the socket 24 through the opening 5 and insert it into the third
The state is as shown in the figure. At this time, the free end portion 14a of the second lead plate 14 has an initial pressure biased in a direction away from the inclined inner wall 3 due to the elasticity of the bent portion 14b, and is in a state obtained by the latching protrusion 9. .
Next, attach the reflector 30 and lens 32 to the battery case 1.
When the lens frame 31 is screwed in and fixed, the socket 24 and battery 12 pressed by the reflecting mirror 30 are displaced to the right from the position shown in the figure.
At this time, the second lead plate 14 is pressed against the power supply terminal 28, but since both are made of elastic conductive plate material, both bend, and the second lead plate 14 is displaced toward the inclined inner wall 3, causing contact between the two. The pressure is equal to the sum of the elastic force due to the amount of deflection and the above-mentioned initial pressure.

Since the second lead plate 14 and the power supply terminal 28 are brought into pressure contact with each other by this sufficiently large contact pressure, the gaseous connection between them is reliably established. Moreover, since the second lead plate 14 is held in a state substantially parallel to the inclined inner wall 3 by the latching protrusion 9 with the protruding piece 10 inserted into its insertion hole 23, there is no possibility of making a mistake when replacing the battery. There is almost no possibility that the second lead plate 14 will be deformed.

In addition, the manufacturing of this portable electric lamp includes the first and second lead plates 11, 14, the switch contact plate 10, the knob 1
9. Assembling the nameplate 28 to the battery case 1,
It is only necessary to hook, fit, or bend engaging portions such as the first and second insertion holes 8a and 8b provided therein and the first and second bending pieces 13 and 16. Therefore, compared to the case where screws, rivets, etc. are used, the number of parts and steps are reduced, and manufacturing costs can be reduced.

As is clear from the above description, the portable electric lamp of the present invention has protrusions, latching protrusions, and insertion holes on the inner wall of the battery case, and insertion holes and bent pieces on the lead plate. It can be attached to the battery case by simply hooking the latch protrusion onto the edge of the hole and inserting and fixing the bent piece into the insertion hole, eliminating the need for screws and other work as in the past. Manufacturing costs can be reduced. Furthermore, since the free end of this lead plate is biased in a direction away from the inner wall of the battery case, when the socket is stored in the battery case, the power supply terminal of the socket and the free end of the lead plate come into strong elastic contact. Moreover, there is almost no risk of accidentally deforming the lead plate.
The contact conduction state is ensured, and a highly reliable portable electric lamp can be obtained.

[Brief explanation of the drawing]

The drawings all show embodiments of the portable electric light of the present invention.
FIG. 1 is an overall perspective view, FIG. 2 is an overall exploded perspective view, FIG. 3 is a sectional view of a main part, and FIG. 4 is an exploded perspective view of a main part. DESCRIPTION OF SYMBOLS 1... Battery case, 2... Body tube, 3... Inclined inner wall, 4... Head tube, 8b... Second insertion hole, 9...
...Latching protrusion, 10... Projection piece, 14... Second lead plate, 14a... Free end, 15... Insertion hole, 16...
Second bent piece, 24... socket, 28... power supply terminal.

Claims (1)

[Scope of utility model registration request] A body tube having a cylindrical shape with a bottom, a head tube communicating with the body tube and having an inclined inner wall that becomes larger in diameter as it moves away from the body tube, and disposed astride the body tube and the head tube. A lead plate made of an elastic conductive plate material is provided, and a socket is provided in the head tube and has a power supply terminal that can contact the lead plate and holds a light bulb, and A protruding piece is formed on the inner wall of the boundary with the head tube, an insertion hole is formed in the body tube, and the lead plate has an insertion hole in the center thereof through which the protruding piece is inserted, and a proximal end thereof. and a bent piece that is inserted and fixed into the insertion hole,
and a latch on the top of the protruding piece for hanging the edge of the insertion hole so as to hold the free end of the lead plate in a state substantially parallel to the inclined inner wall against the elastic force of the lead plate. A portable electric light characterized by forming protrusions.