JPH0650956Y2 - Electrode plate for PTC heater - Google Patents

Description

[Detailed Description of the Invention] Industrial application The present invention relates to an improvement of an electrode plate for a PTC heater, which is assembled as a heating mechanism portion of an electronic mosquito trap, an air freshener, or the like.

2. Description of the Related Art Conventionally, for this type of electrode plate, a power supply terminal portion that is led out to the outside of the PTC heat generator and an electrode contact terminal portion that makes surface contact with the electrode of the PTC heating element inside the PTC heat generator are electrically conductive. It is known that a metal plate material with good properties is integrally formed, and a fine fuse part that cuts out a part of the plate surface and blows off by overcurrent is provided on the way (Actual No. 62-74301). .

In this PTC heater electrode plate, the power supply terminal part and the electrode-pair contacting terminal part are connected by a very fine fuse part, so the whole is integrally punched from a metal plate material with good conductivity and then formed into a predetermined shape. During the process from bending and assembling to the PTC heat generator, it is extremely troublesome to handle because it is necessary to pay close attention not to bend or twist the fuse part.

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention An object of the present invention is to provide an electrode plate for a PTC heater which can be easily handled by reinforcing an extremely fine fuse part with a simple structure.

Means for Solving the Problems In the electrode plate for the PTC heat generator according to the present invention, the power supply terminal portion projecting to the outside of the PTC heat generator is brought into surface contact with the electrode of the PTC heat generating element inside the PTC heat generator. A terminal portion for electrode pairing is integrally formed from a metal plate material, and the terminal portion for power feeding and the terminal portion for electrode pairing are connected by a fine fuse portion that electrically cuts off by fusing due to overcurrent, It is configured by cutting out a part of the plate surface of the metal plate member and providing a stripnable reinforcing plate portion in the vicinity of the fuse portion.

Function This PTC heater electrode plate connects the power supply terminal and the electrode contact terminal during the process of assembling the electrode plate of the PTC heater by punching the entire metal plate and bending it into a predetermined shape. Since the shape of the fine fuse portion can be retained by the strip-shaped reinforcing plate portion, the handling can be easily performed and the entire shape can be accurately retained. Also, since the reinforcing plate part is formed into a strip shape that can be cut by partially cutting out the plate surface of the metal plate material, by cutting the reinforcing plate partly at the time of assembly, the terminal part for electrode pairing and power supply Since the terminal portion and the fuse portion only need to be connected to each other, the assembly can be done easily.

Embodiments The following will be described with reference to the accompanying drawings.

The electrode plate 1 shown in FIG. 1 has two pairs of PTCs, as will be described later.
It is formed as an assembly of a heating element. The electrode plate 1 is formed by punching a metal plate material such as a stainless thin plate into a predetermined shape by a press or the like as a terminal plate on one side for sandwiching the PTC heating element from both sides. The electrode plate 1 has a power supply terminal portion 10 projecting outside of the PTC heat generator located at the center, and electrode pair contacting terminal portions 11a and 11b for making surface contact with the electrodes of the PTC heat generating element, respectively, being provided integrally on both sides. Has been formed. Further, the electrode pair contacting terminal portions 11a and 11b and the power feeding terminal portion 10 are formed continuously by a bridging plate portion 12 and integrally formed.

In this electrode plate 1, by partially cutting out the plate surface of the bridge plate portion 12, the power supply terminal portion 10 and the electrode pair contact terminal portion 11a,
Ultra-fine fuse portions 13a and 13b are provided to connect with 11b. In addition to the fuse portions 13a, 13b, a strip-shaped reinforcing plate portion 14a, 14b, which is relatively wide and can be cut, is provided so as to be substantially parallel to a neighboring position facing the fuse portions 13a, 13b with a space therebetween. ing. The reinforcing plate portions 14a, 14b are stamped and formed together with the fuse portions 13a, 13b by partially cutting out a plate surface extending from the electrode contacting terminal portions 11a, 11b to the bridging plate portion 12 into a substantially rectangular shape.

In the electrode plate 1, the fuse parts 13a, 13b described above are used.
In addition to the reinforcing plate portions 14a, 14b, the upper and lower bending flange portions 15a, 15b for positioning and locking the PTC heating element and the left and right protruding pieces 16a, 16b are provided on the electrode contact terminal portions 11a, 11b. There is. Further, the power supply terminal portion 10 is provided with a hole 17 for facilitating the plate surface to be bent at a right angle. This electrode plate 1 is
By bending the fuse parts 13a, 13b and the reinforcing plate parts 14a, 14b at right angles to each other, the terminal parts 11a, 11b for electrode contacting each other via the bridging plate part 12 are substantially U-shaped so as to face each other. It is bent and shaped. Further, the power supply terminal portion 10 is bent into a reverse L shape by being bent at a right angle at the connecting portion with the bridge plate portion 12 and the cutout hole 17, respectively.

With such a configuration, in the PTC heater electrode plate 1, the power feeding terminal portion 10 and the electrode pair contacting terminal portions 11a and 11b are connected to the bridging plate portion 12.
The fuses 13a and 13b are connected to each other via the vias, and the reinforcing plate portions 14a and 14b having a relatively wide band are connected to each other. Therefore, since the rigidity as a whole can be maintained when bending from a metal plate material into a predetermined shape after punching, not only the bending process can be easily performed, but also the upper and lower bending flange portions 15a, 15b and the protruding pieces 16a, 16b. It is possible to accurately shape the whole including the above. The electrode plate 1 is PT
It can be easily handled during the process of assembling to the C heat generator, and the fuse parts 13a and 13b can be prevented from being unnecessarily bent or twisted.

As shown in FIG. 2, the electrode plate 1 includes reinforcing plate portions 14a and 14b.
It can be cut out partially and attached to the PTC heater.
By cutting off the reinforcing plate portions 14a and 14b, the power feeding terminal portion 10 and the electrode pair contacting terminal portions 11a and 11b are connected only by the fuse portions 13a and 13b, so that the fuse portions 13a and 13b can be melted by overcurrent. Power supply terminal 10 and electrode pairing terminal 11a, 11b
It is possible to exert a fuse function of cutting off the electrical continuity of.

This electrode plate 1 can be assembled to the PTC heater 2 shown in FIG. The electrode plate 1 has a power supply terminal portion 10 as one terminal, and a PTC heat generating element to be described later is sandwiched between the electrode plate 20 and the electrode plate 20 assembled on the opposite side to form a power supply circuit. The electrode plate 20 has a substantially U-shaped main body and both ends of the body are electrode pair contact terminals 20a and 20b, and the PTC heating elements 21a and 21b are the electrode pair contact terminal portions 20a and 20b of the electrode plate 20 and the terminals. Assembled as a PTC heating element having an L-shaped protruding power supply terminal portion 20c of the electrode plate 20 as another terminal by sandwiching it between the electrode pair contacting terminal portions 11a and 11b of the plate 1 and making surface contact with each electrode. To be

As shown in FIG. 4, the PTC heating element is assembled to the PTC heating element 2 which is an insulative container body 22 such as alumina porcelain or heat resistant plastic having good thermal conductivity. In this assembly, the PTC heating elements 21a and 21b are fitted in the concave groove 22a of the container body 22, and the power supply terminal portions 10 and 20c of the electrode plates 1 and 20 are slit.
The electrode plates 1 and 20 and the PTC heating elements 21a and 21b may be housed and arranged inside the container body 22 by pulling them out from 22b and 22c and fitting the bottom plate 23 into the recess 22d. Further, the bottom plate 23 is fitted with a mounting bracket 24 having a plurality of hooking claws 24a on the concave groove surface 23a, and the heat radiation ring 25 is attached to the container body 22, the bottom plate 23, and the mounting bracket.
It is possible to configure the PTC heat generator 2 by integrally assembling the respective components by inserting the central apertures 22d, 23b, 24b of 24 and crimping at the projecting end side.

In the PTC heat generator 2, as shown in FIG. 5, the power supply terminal portions 10 and 20c are located on the bottom surface side of the container body 22 so as to project for power supply connection. Further, a detection circuit for notifying that the fuse parts 13a, 13b are blown by an overcurrent by turning off the mini lamp or the like can be incorporated.

In the above-described embodiment, the electrode connecting terminal portions 11a and 11b are connected by the bridging plate portion 12, and the two fuse portions 13a and 13b on the left and right and the reinforcing plate portions 14a and 14b are provided on the plate surface of the bridging plate 12. However, instead of this, as shown in FIG. 6, the left and right electrode pair connecting terminal portions 11a, 11 are provided.
It is also possible to provide one fuse portion 13 connecting the b and the power supply terminal portion 10 on the intermediate side of the bridge plate portion 12. The fuse portion 13 has a thickness of 0.1 mm and a width of 0 when using a voltage of 100 V, for example.
The width may be about 1 to 0.4 mm, preferably about 0.2 to 0.3 mm.

With this electrode plate 1, the left and right electrode pair contacting terminal portions 11a and 11b are held in a predetermined shape by the bridging plate portion 12 and are positioned relatively parallel to the bridging plate portion 12 so that the electrode pairing terminal portion on one side is positioned. It can be provided as a reinforcing plate portion 14 continuous with 11a. Further, if the fuse portion 13 that connects the reinforcing plate portion 14 and the bridging plate portion 12 is provided near the electrode pair contacting terminal portion 11b on the other side via the power feeding terminal portion 10 protruding from the reinforcing plate portion 14, Good. This electrode plate 1 has one PT
When an excessive current flows to the C heating element and the fuse portion 13 is blown, not only can the power supply to the PTC heating elements from the left and right electrode pair connecting terminal portions 15a and 15b be cut off, but the reinforcing plate portion 14 at the time of assembly. Since it only needs to be cut off at one place, it is preferable because it can save the labor for assembling work.

This PTC heater 2 is an electronic mosquito catcher 3 as shown in FIG.
Can be assembled on. The electronic mosquito trap 3 is of a chemical volatilization type in which a chemical container 32 is housed inside a bottom case 30 and an inner lid case 31, and a hook 24a of a mounting bracket 24 is provided on the upper side of the inner lid case 31. The PTC heat generator 2 is attached by fitting and the power source is connected to the power supply terminal portions 10 and 20c with lead wires 33a and 33b.
It is assembled by connecting with. In this electronic mosquito trap, the drug suction core 34 to be inserted into the drug container 32 is PT
Position it in the cylinder formed by the heat dissipation ring 25 of the C heat generator 2,
The sucking core 34 is heated by the heat radiating ring 25 to volatilize the drug and release it from the opening of the outer lid case 35 to exert an insecticidal effect.

Effect of the Invention As described above, according to the electrode plate for the PTC heater according to the present invention, an extremely fine fuse part that is blown by an overcurrent is provided between the power supply terminal part and the electrode pair contact terminal part. Since the power supply terminal portion and the electrode pair contacting terminal portion are connected by the strip-shaped reinforcing plate portion that can be cut off, not only the extremely fine fuse portion but also the entire shape can be reliably formed or the shape can be maintained. Assembly or other handling including shaping can be easily performed.

[Brief description of drawings]

FIG. 1 is a perspective view of an electrode plate for a PTC heater according to the present invention, FIG. 2 is a perspective view showing how the electrode plate is assembled in a PTC heater, and FIG. 3 is a PTC heating element to which the electrode plate is assembled. Fig. 4 is a side perspective view of the PTC heat generator assembled with the electrode plate, Fig. 5 is a bottom view of the PTC heat generator, and Fig. 6 is another embodiment of the present invention. FIG. 7 is a perspective view of an electrode plate for a PTC heater according to an example, and FIG. 7 is a schematic side sectional view of an electronic mosquito trap showing an example of use of the PTC heater. 1: electrode plate, 10: power supply terminal portion, 11a, 11b: electrode contact terminal portion, 13a, 13b, 13: fuse portion, 14a, 14b, 14: reinforcing plate portion,
2: PTC heating element, 21a, 21b: PTC heating element.

Claims (1)

[Scope of utility model registration request] 1. A power supply terminal portion (10) protruding to the outside of a PTC heat generator (2) and an electrode pair for making surface contact with the electrodes of the PTC heat generating elements (21a, 21b) inside the PTC heat generator (2). The contact terminals (11a, 11b) are integrally formed from a metal plate, and the power supply terminal (10) and the electrode pair contact terminals (11a, 11b) are electrically cut off by fusing due to overcurrent. In the electrode plate for the PTC heat generator connected with the extremely fine fuse parts (13a, 13b, 13), cut out a part of the plate surface of the above metal plate material, and cut out the strip-shaped reinforcing plate parts (14a, 14b, 14). Fuse section (13a, 13b, 1
An electrode plate for a PTC heater, which is provided in the vicinity of 3).