JPH0416351Y2 - - Google Patents

Description

[Detailed description of the invention] <<Industrial application field>> This invention relates to an improvement of a dry battery for a marker light that can be used as a road sign light by simply attaching a miniature light bulb to a socket attached to the outer case.

<Prior Art> This type of dry cell battery for marker lights is used as a marker light at road construction sites, etc., and is designed to be discarded when the battery capacity runs out. are essentially different.
In other words, a plurality of unfinished batteries are housed inside a paper or plastic exterior cylinder, and a miniature light bulb socket connected to the internal battery is attached to one end of the exterior cylinder. It did not have a switch, and could be said to simply have a socket for a miniature light bulb as an output terminal for the battery. As is clear from the main purpose of this type of marker light, which is a disposable marker light, it is important for manufacturers to manufacture batteries for this type of marker light at a low cost without sacrificing the minimum required functionality. This is a challenge.

FIG. 3 shows a typical structure of a conventional dry battery for a marker light. This device consists of a bottomed cylindrical exterior cylinder 1, a plurality of cylindrical unit cells 2 housed coaxially within the exterior cylinder 1, and fitting and mounting on the inner periphery of the opening of the exterior cylinder 1. a socket mounting base 3, a socket 4 for a miniature light bulb fixed to this socket mounting base 3, lead wires 7a, 7b, 7c connecting this socket 4 and the above-mentioned unit cell 2, and the above-mentioned exterior cylindrical body 1.
The socket mounting base 3 is formed at the opening edge of the socket mounting base 3.
It has a curl locking part 1a that prevents it from coming off.

The above-mentioned exterior cylinder 1 and socket mounting base 3 are each integrally molded of plastic (blow molding, etc.)
It is composed of. The socket mounting base 3 is
A donut plate part 3a having an outer diameter approximately equal to the inner diameter of the exterior cylinder 1, an outer cylinder part 3b integrally formed on the lower surface of the outer peripheral side of the donut plate part 3a, and an integrally formed donut plate part 3a at the center of the donut plate part 3a. A socket 4 consisting of a mounting cylinder part 3c is fitted and fixed to the mounting cylinder part 3c.

When the socket mounting base 3 is fitted and mounted on the inner periphery of the opening of the exterior cylindrical body 1, and the curl locking portion 1a is formed, for example, by heat caulking, the locking force acting downward acts on the socket mounting base 3, The lower end of the outer cylindrical part 3b presses the upper surface of the unit cell 2, and the unit battery 2 is held in the outer cylindrical body 1.
Stabilize within.

Furthermore, conventionally, the unit cell 2 employs the structure of a general dry battery as it is. That is, as shown in FIG. 4, a positive electrode mixture 23 and a current collector rod 24 are loaded into a bottomed cylindrical negative electrode zinc can 21 via a separator 22, and a brim paper 25 is placed on the upper surface of the positive electrode mixture 23. At the same time, a sealing agent 26 such as pitch is applied to the upper part of the zinc can 21, and the upper end opening of the zinc can 21 is closed with a sealing plate 7, which is fixed by curling the zinc can 21. The upper end of the current collector rod 24 is covered with a positive electrode cap 28, which passes through the center hole of the sealing plate 27.

And the outer cylinder part 3b of the socket mounting base 3 mentioned above.
The lower end of the unit cell 2 is in contact with the upper surface of the sealing plate 27 of the unit cell 2 .

<<Problems to be solved by the invention>> The conventional dry cell batteries for marker lights mentioned above had the following problems. Plastic, which is the material of the outer cylindrical body 1, is sensitive to high temperature environments, and is also sensitive to vibrations, shocks, and loads. Therefore, the exterior cylinder 1 is likely to be deformed during transportation, storage, or use. When the upper end portion of the exterior cylindrical body 1 is deformed, the fixing force of the socket mounting base 3 is often loosened. Therefore, in the production stage, the tightening force by the curl locking portion 1a is made considerably large.

By the way, as shown in FIG. 3, a part 7c of the lead wire connecting the socket 4 and the unit cell 2
The upper surface of the uppermost unit cell 2 and the socket mounting plate 3 are
The wiring is routed through the lower end of the outer cylindrical portion 3b, and is sandwiched between them. In this configuration, if the above-mentioned tightening force that presses down the socket mounting base 3 is large, the lead wire 7c sandwiched therein may be cut. Even if the lead wire 7c is not cut during manufacture, it is very likely to be cut at the point where the lead wire 7c is pinched by the lower end of the outer cylindrical portion 3b due to vibration or impact during transportation or use. In addition, when the fixation of the socket mounting base 3 is loosened, the socket mounting base 3 itself becomes easy to rotate when it is attached to the socket 4 of the miniature light bulb, but at this time, the lead wire 7c may rub against the lower end of the outer cylindrical portion 3b. It may be severed due to stress. In addition, errors in the height of the exterior cylinder 1, the position of the curl locking portion 1a, and the heights of the unit cell 2 and socket mounting base 3 accumulate, and the tightening force by the curl locking portion 1a fluctuates greatly. When the tightening force becomes excessive, the above-mentioned problems are particularly likely to occur.

Furthermore, for the purpose of minimizing the cost, the structure of the unit cell 2 does not require a sealing plate 27 like a general dry battery, and there is no problem with the overall sealing performance even without the sealing plate 27. . However, in the conventional structure, the lower end of the outer cylindrical portion 3b of the socket mounting base 3 comes into contact with the upper surface of the sealing plate 27, so that the sealing plate 2
7 cannot be omitted. Therefore, the number of parts could not be reduced, the number of assembly steps could not be reduced, and the price could not be lowered.

This idea was devised in view of the conventional problems mentioned above, and its purpose was to eliminate breakage failures of internal lead wires, and to absorb the dimensional errors mentioned above to reduce variations between products. The purpose of the present invention is to provide a dry battery for a marker light.

Another object of this invention is to provide a structure that eliminates the sealing plate of the unit cell, eliminates the component cost and assembly cost, and does not cause any problems as a dry cell for a marker light.

<Means for Solving the Problems> Accordingly, in this invention, in a dry battery for a marker light using a socket mounting base in which the above-mentioned donut plate part, outer cylinder part, and socket mounting cylinder part are integrally formed, the above-mentioned outer cylinder A plurality of window holes are formed in the outer cylinder part so that the outer cylinder part can be elastically deformed in the height direction by the window holes, and an internal lead wire is routed through the window holes.

In addition, the sealing plate of the unit cell is omitted, and the inside of the unit cell is sealed only with the brim paper and the sealant. It has a structure that fits and abuts on the upper opening edge of the zinc can.

《Operation》 Even if various dimensional errors accumulate and the tightening force that presses the socket mounting base downward varies greatly, the above-mentioned outer cylindrical part can be elastically deformed by the above-mentioned window hole, so the variation will be reduced. This is absorbed by its elastic deformation, eliminating poor appearance and poor tightening force of the curl locking portion. Further, since the lead wire is routed through the window hole, no local force is exerted due to pinching as in the conventional case, so that no disconnection failure occurs.

The force that presses the socket mounting base downward is:
The lower end of the outer cylindrical part joins the upper edge of the negative electrode zinc can and is mechanically received there.

Embodiment FIG. 1 is a sectional view of the main part (upper end) of a dry battery for a marker light according to an embodiment of the present invention, and FIG. 2 is a perspective view of the socket mounting base of the battery shown in FIG. 1. Note that the same parts and corresponding parts as in the conventional example shown in FIG. 3 are given the same reference numerals.

The dry battery for marker lights according to this invention basically has the following characteristics:
A bottomed cylindrical exterior cylinder 1, a plurality of cylindrical unit cells 2 housed coaxially within this exterior cylinder 1, an outer cylinder part 3b on the lower surface of the outer peripheral side of the donut plate part 3a, and a center A socket mounting cylindrical portion 3c is integrally formed in each portion, and the socket is configured to be fitted and attached to the inner periphery of the opening of the outer cylindrical body 1, and to press the upper surface of the unit cell 2 with the lower end of the outer cylindrical portion 3b. A mounting base 3, a socket 4 for a miniature light bulb that is fitted and fixed to the mounting cylinder portion 3c of the socket mounting base 3, and lead wires 7b, 7c that connect the socket 4 and the unit cell 2.
and a curl locking portion 1a formed on the opening end edge of the exterior cylinder 1 to prevent the socket mounting base 3 from coming off.

The donut plate part 3a, outer cylinder part 3b, and mounting cylinder part 3c of the socket mounting base 3 are integrally molded from plastic. In particular, in the present invention, a plurality of horizontally long oval window holes 3d are provided in the outer cylinder portion 3b. By forming the window hole 3d, the remaining flesh part becomes columnar or beam-shaped to form an outer cylindrical part 3bwo. The beam-shaped portion at the lower end of the outer cylindrical portion 3b acts like a spring with appropriate elasticity, allowing the outer cylindrical portion 3b to be elastically deformed in the vertical direction.

In addition, in this invention, the unit cell 2 is constructed by loading a positive electrode mixture 23 and a current collector rod 24 on the inner surface of a bottomed cylindrical negative electrode zinc can 21 with a separator 22 interposed therebetween. 25 and a sealing agent 26 such as Pitch is applied on the top thereof, and the conventional sealing plate 27 shown in FIG. 4 is not provided. The upper end of the current collector rod 24 protruding from the sealant 26 is covered with a positive electrode cap 28.

Then, as shown in Fig. 1, the socket mounting base 3
A stepped portion 3e is formed at the lower end of the outer cylindrical portion 3b, and this stepped portion 3e is fitted into and abuts the upper opening edge of the negative electrode zinc can 21.

In addition, since the lead wire 7c is wired through the window hole 3d, the unit cell 2
It is not strongly pinched between the upper surface and the lower end of the outer cylindrical portion 3b, and the disconnection failure as in the conventional case does not occur.

In addition, since the outer cylindrical portion 3b can be elastically deformed in the vertical direction, errors in the height dimensions of the outer cylindrical body 1, the socket mounting base 3, and the unit cell 2 may accumulate, and the formation of the curl locking portion 1a may occur. Even if the position varies, the variation is absorbed by the elastic deformation of the outer cylindrical portion 3b, and no unreasonable force is applied to the curl locking portion 1a or the appearance of this portion is disturbed.

<<Effects of the invention>> As explained in detail above, according to this invention, disconnection failures of internal lead wires in dry cell batteries for marker lights are extremely reduced, and dimensional errors and assembly errors of parts are well absorbed. Because of the internal structure,
In this respect as well, the occurrence of defective products is reduced. Furthermore, since the sealing plate of the unit cell is omitted, the parts cost and assembly cost are reduced accordingly. Furthermore, since the socket mounting base directly contacts the upper edge of the negative electrode zinc can of the unit cell, its stability is increased.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of the main parts of a dry battery for a marker light according to an embodiment of this invention, Fig. 2 is a perspective view of the socket mounting base in Fig. 1, and Fig. 3 is a sectional view of a conventional dry battery for a marker light. FIG. 4 is a block diagram of a conventional unit cell. 1... Exterior cylindrical body, 1a... Curl locking part, 2...
...Battery, 3...Socket mounting base, 3a...Donut plate part, 3b...Outer tube part, 3c...Socket mounting cylinder part, 3d...Window hole, 4...Socket, 7a,
7b, 7c...Lead wire, 21...Negative electrode zinc can,
22... Separator, 23... Positive electrode mixture, 24...
... Current collector rod, 25 ... Collar paper, 26 ... Sealing agent.

Claims (1)

[Claims for Utility Model Registration] A cylindrical outer case with a bottom, a plurality of cylindrical unit cells housed coaxially within the outer case, and an outer cylinder on the lower surface of the outer periphery of the donut plate. and a socket mounting base having a structure in which a socket mounting cylinder is integrally formed in the center thereof, the socket mounting cylindrical part is fitted into the inner periphery of the opening of the outer cylindrical body, and the lower end of the outer cylinder part presses the top surface of the unit cell. , a socket for a miniature light bulb that is fitted and fixed to the mounting tube part of the socket mounting base, and a lead wire that connects this socket to the unit cell;
A curl locking portion is formed on the opening edge of the outer cylindrical body to prevent the socket mounting base from coming off, wherein the unit cell is placed inside a bottomed cylindrical negative electrode zinc can with a separator attached thereto. A positive electrode mixture and a current collector are loaded through the socket, a collar paper is placed on the upper surface of the positive electrode mixture, and a sealing agent is applied on the upper surface of the sealing structure. A plurality of window holes are formed in the outer cylinder part so that the outer cylinder part can be elastically deformed in the height direction by the window holes, and the lead wire is routed through the window holes, and the outer cylinder part A dry battery for a marker light, characterized in that a stepped portion formed at a lower end of the unit cell is fitted into and abuts an upper opening edge of the zinc can of the unit cell.