JPH0644059Y2 - Conductive film connector - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an electric blanket, a carpet with built-in electric heat, that is, an ordinary carpet to which a heat transfer type under carpet is attached, a film heater, a flexible cord, and other flats. The present invention relates to a connector for connecting a conductive film used in a cable or the like, that is, an electrode part of the conductive film that generates Joule heat when energized to a terminal attached to a power source side electric wire.

<Prior Art> Conventionally, a pair of electrodes, which are generally provided on a conductive film of this type so as to be isolated from each other, is made of a metal foil such as a copper foil or an aluminum foil. Then, these electrodes are connected to the electric wire end portion on the power supply side through a considerably thick connecting member. As an example, the thickness of the conductive film is around 0.2 mm and the thickness of the foil as the electrode is about 0.5 mm, but the connecting member is several m
It can reach a thickness of up to m.

Despite the fact that the central main part of the electric blanket, electric carpet, etc. is extremely thin, the connecting portion at the periphery thereof is thick and unnaturally raised due to the thick connecting member. Could be uncomfortable.

As a countermeasure against this, some attempts have been made to solder the electrode to a connection member (terminal) that is sufficiently thin corresponding to the thinness of the electrode made of copper foil or the like. Due to the thinness of the members, a reliable joining state cannot always be obtained, but rather the local high temperature during soldering may cause significant deformation of the electrodes or the like, or the electrodes and the thin conductive film itself joined to the electrodes. It might even be damaged.

<Problems to be Solved by the Invention> The present invention has been made in consideration of the above circumstances, and an object of the invention is to mount the foil-like electrode (compression bonding) in spite of a sufficiently thin conductive material sheet. ) Is strong, reliable and easy, and is also easy to manufacture, and to provide a conductive film connector.

<Means for Solving the Problem> As a result of various studies by the present inventors in order to achieve this object, the inventors have created a novel conductive film connector according to the present invention.

That is, the conductive film connector of the present invention is a connector for connecting an electrode made of a conductive material foil attached to a conductive film that generates heat when energized to a terminal on the power supply side, and is fixed to the terminal. And a tongue-shaped portion for electrode connection, which is formed from a thin conductive metal sheet and extends from the projection, to which the uncovered electric wire is crimped. The tongue-shaped portion for connecting to the electrode has one or more cut-and-raised pieces surrounded by narrow slits on three sides, and the electrode has a shape to be connected and fixed to the terminal. The cut-and-raised piece is pressed and deformed in a state of being inserted between the body portion and the cut-and-raised piece, and the cut-and-raised piece is restored so as to be flush with the main body portion. The width of the slit surrounding the tongue-shaped portion on three sides is slightly larger than the thickness of the electrode. Is shall.

Here, in consideration of the thickness and flexibility of the electrode to be connected, or the thickness of the conductive film itself, the slit is at least as thick as the electrode so that the electrode or the conductive film is not damaged. Designed to a wide range.

It should be noted that the rounding (formation of the protector) at the slit end portion as shown in Examples described later is a preferable shape in order to prevent damage to the foil electrode or the conductive film itself. However, this is not always an essential component in the present invention.

Further, in an example in which a reinforcing rib as described below is provided on the tongue-shaped body portion and the cut-and-raised piece, or on either one of them, a thin slit that is difficult to form by other methods is used. It is extremely convenient because it can be naturally generated as the ribs are formed. However, again, this is not an essential requirement of the present invention.

The conductive metal sheet is selected from copper sheet, aluminum sheet and the like in consideration of workability, durability, conductivity and the like. Although the thickness is preferably about 0.8 mm as an example, the thickness is not limited to this and is a matter that should be appropriately determined according to the required conditions of the electric blanket or the like.

Further, the number, specific shape, arrangement, etc. of the above-mentioned cut and raised pieces per connector of the present invention can be freely designed as appropriate.

Incidentally, such a tongue-shaped portion for electrode connection is preferably made of a single metal sheet integrally with the projection to be connected to the electric wire terminal, but is not limited only to this. It may be manufactured by using different materials and then firmly bonded so as not to be separated.

<Operation> Since the conductive film connector according to the present invention is configured as described above, the electrode portion fixed to the conductive film is cut off from the main body portion of the electrode connecting tongue portion during use. Before being cut and raised so that the cut and raised piece is substantially flush with the tongue portion main body portion by inserting it into the gap between the raised piece and an appropriate pinching or pressing means such as a punch. It is only necessary to perform a simple operation to restore the shape.

As a result, the pressure-bonded electrode portion passes through one slit from the lower side to the upper side of the main body portion of the tongue portion, and then,
The adjacent slit is reached along the upper surface of the main body portion, and conversely, the slit passes through the adjacent slit from the upper side to the lower side, and then is guided along the lower surface of the main body portion again to form a zigzag state.

Moreover, since the width of the slit is only slightly larger than the thickness of the electrode portion, it is sandwiched between the edges of the narrow slits, and due to the frictional resistance at the edge, the electrode portion is kept above the It is almost impossible to pull out from the tongue-shaped portion for electrode connection, and there is no risk of damage when the electrode connected to the conductive film or the film itself is pressure-bonded to the tongue-shaped portion.

When the electrode part is inserted, the edge of the electrode is rubbed against the end of the slit. Therefore, if the above-mentioned roundness (protector) is formed at the end, the electrode or the conductive material bonded to it This is advantageous because damage to the membrane is prevented.

After the above electrode crimping operation, the above-mentioned projection is inserted and fixed to the crimped terminal with the stripped end of the electric wire on the power source side.

<Embodiment> Hereinafter, the present invention will be described in more detail with reference to the embodiment shown in the drawings.

In the embodiment shown in FIG. 1, a projection (16) for terminal connection and a tongue (1) for electrode connection are provided by using one copper sheet having a thickness of about 0.8 mm.
8) is a conductive film connector formed with and the tongue (1
8) is a cut-and-raised piece (22) surrounded by a slit (20) having a width of about 0.4 mm, and its lower surface and the upper surface of the main body portion (18a) of the tongue-like portion (18). Clearance between and about 0.8mm
Has been cut and raised (Figs. 2 and 3).

The end of the slit (20) and the corner have a diameter of approximately
2mm roundness (24) is provided. The operation of this is as described above.

The protrusion (16) is inserted into the terminal (14) (Figs. 4 and 5) to which the electric wire (E) from the power source is fixed, and the terminal is pressed and deformed and fixed there. However, it is convenient to perform this operation after connecting the electrode (12) formed or attached to the side edge of the conductive film (10) to the tongue. The protrusion (16) has dimples (16
a) That is, small depressions are formed.

On the other hand, a copper foil electrode (12) connected to the conductive film (10)
Is the lower surface of the cut-and-raised piece (22) and the main body of the tongue (18
After being inserted between the upper surface of (a) (Fig. 4 (a)), the cut-and-raised piece (22) is pushed down toward the main body part (18a) and cut-and-raised so as to be flush with the part. The state is restored to that shown in FIG. 4B to FIG. 5B.

As a result, the electrode (12) is repeatedly "sneaking through" the narrow slit (20) and the body portion (18).
The upper surface of a) and the lower surface of the cut-and-raised piece (22) are alternately attached to each other, and are brought into close contact with these surfaces.

As a result, as shown in FIG. 5 (a, b), almost no unnatural swelling is observed in the joint area between the electrode (12) and the connector of the present invention.

In the first embodiment, one strip-shaped (rectangular) cut-and-raised piece (22) is formed as described above, but in the embodiments shown in FIGS. 6 to 11, a plurality of strips are provided for each connector. The cut-and-raised pieces (22) are provided, or one cut-and-raised piece having a shape corresponding to two cut-and-raised pieces in its operation is provided.

In the second embodiment of FIG. 6, since the two cut-and-raised pieces (22) in the same direction are provided, the electrode (12) is more firmly fixed to the connector.

In this example, since the projections (16) are formed by folding back both side edges of the rectangular plate portion and making the edges have a thickness of two butting plate members, the wire side terminal Depending on the model, it may be possible to more firmly fix the terminal to the terminal than the protrusion in the first embodiment. Since the other points are all the same as those of the first embodiment, the description thereof will be omitted.

The third embodiment of FIG. 7 is the same as the second embodiment in that two cut-and-raised pieces (22) are arranged side by side in the longitudinal direction of the tongue-like portion (18) for electrode connection. This is different from the second embodiment in that the raising directions of these cut-and-raised pieces (22) are opposite to each other (B in the figure). Therefore, the connector of the third embodiment has strip-shaped electrodes as shown in FIG.
It is suitable for fastening in a posture that intersects the longitudinal direction of the tongue-like portion, the electrode is sandwiched from both sides by the base of the cut-and-raised piece, and a plurality of the cut-and-raised pieces are arranged in two vertical and horizontal directions. It will be fixed by (22).

The projections (16) in the example of FIG. 7 are formed as rods as a whole by bending and abutting both edge portions of the plate material twice, so that the strength is improved, and depending on the model of the terminal, It is possible to attach it more firmly to.

In the fourth embodiment of FIG. 8, two cut-and-raised pieces (22) in a direction intersecting the extension direction of the tongue (18) are arranged in the same direction. The operation and the like are similar to those of the second embodiment.

The fifth embodiment of FIG. 9 is the same as that of the fourth embodiment except that the directions of the two cut-and-raised pieces are opposite to each other, and the operation and the like are almost the same as those of the third embodiment of FIG. Is the same. However,
The strip electrodes are connected in a state in which the longitudinal direction of the strip electrodes coincides with the longitudinal direction of the tongue portion of the connector of this example.

In the sixth embodiment of FIG. 10, the larger slit among the two U-shaped slits (20) is opened so as to surround the smaller slit, and the slit is sandwiched by the two slits. One "U" -shaped cut and raised piece (22) is formed.
Therefore, the same action as that in which the two strip-shaped cut-and-raised pieces are arranged side by side in each of the above-described examples is exerted, and the electrode holding action is large.

In the seventh embodiment of FIG. 11, a minimum slit (20) is additionally formed further inside the smaller inner slit (20) in the sixth embodiment. In this case,
A small strip-shaped cut-and-raised piece (22) is arranged inside the "U" -shaped cut-and-raised piece (22). Therefore, in this example, since the appearance (C in the same figure) as if a total of three rectangular cut-and-raised pieces were provided is provided, a stronger electrode holding action can be obtained.

In the eighth embodiment shown in FIG. 12, the main body portion (18) of the tongue-shaped portion (18) inside the one U-shaped cut-and-raised piece (22)
In addition, a reinforcing rib (26) having a "U" shape and a "U" cross section is also provided in a). The ribs (26) serve to facilitate the production of the connector of the present invention. That is, the width of the slit in the present invention is very thin corresponding to the thickness of the electrode (12), and it is not easy to punch (punch) this with two blades, but the rib In the case of this example in which (26) is provided, a simple score line is formed by a shearing device, and in the subsequent formation of the U-shaped rib, the dimension in plan view is reduced in the direction in which the material intersects the rib. Therefore, by utilizing this phenomenon, a slit having a predetermined width can be naturally generated.

In addition, the same figure (C) shows the rib (26) of the tongue-shaped body portion (18a).
And a rib (26) of the cut-and-raised piece (22) is a modified example in which the direction of the protrusion is reversed. According to this modified example, in the case of the figure, the electrode can be brought into close contact with the upper surface of the tongue-shaped body portion (18a) and the lower surface of the cut and raised piece (22), respectively, despite the presence of the rib. It is possible, and it is more preferable than the case of FIG. 9A from the viewpoint of appearance and electrode holding action.

FIG. 13 shows an example of using the connector of the present invention for the electrode (12) attached to the conductive film (10) in an S-shape. Different,
The operation and effects of the connector itself are exactly the same, so will not be described again.

<Effects of the Invention> The present invention provides the conductive film connector as described above, and the effects thereof are clear from the above description.
The following is a brief summary.

(I) Bending one half of the conductive metal sheet having a required thickness,
Or, as it is a flat plate, there is no projection to be connected to the wire connection terminal, and a tongue-shaped portion for electrode connection can be formed only by engraving a thin slit in the other half part, so that its manufacture is easy, In particular, when the reinforcing ribs as described above are provided, it is easy to form the slits. (Ii) At the time of use, the projection is inserted into the terminal and crimped, that is, in the middle of the longitudinal direction of the terminal. It can be attached only by flattening the part or the whole length, and the electrode is inserted between the tongue-shaped body portion and the cut-and-raised piece and crimped, that is, the cut-and-raised piece is pressed to be flush with the body portion. It is easy to use because it can be attached simply by making it, and since the width of the slit is slightly larger than the thickness of the electrode, there is no risk of damaging the electrode or conductive film during crimping, especially Protector such as the end of the slit and If it is provided in the inner part, there is no risk of damaging the thin electrode when it is inserted. (Iii) Since the thin electrode can be fixed to the thin tongue for electrode connection in a flat posture, There is no risk of the wearing part rising unnaturally as in the past, and therefore, not only in appearance but also in the risk of hitting other objects during use of the electric appliance, even if hit, the impact will be It is not as big as in the case, (iv) Furthermore, it can be connected simply by inserting the above-mentioned protrusion into the commercially available terminal for crimping the end of the wire and pressing it, and no special terminal is required. Various advantages such as being able to easily correspond to the power supply side terminal and the like can be obtained.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, and FIGS. 1 to 5 are views showing the first embodiment. FIG. 1 is a plan view of a conductive film connector.
2 is a front view, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, FIGS. 4 (a) and 4 (b) are sectional views showing the usage state, and FIG. 5 (a). ) Is a perspective view, and FIG.
FIG. 6A is a perspective view of the second embodiment, FIG. 6B is a plan view in use, and FIG. 6C is a same view as FIG. Sectional view taken along line VI-VI in Fig. 7,
FIG. 6A is a perspective view of the third embodiment, FIG.
FIG. 8C is a plan view of a state of use, FIG. 8 is a plan view of the fourth embodiment, FIG. 9 is a plan view of the fifth embodiment, and FIG. 10A is a plan view of the sixth embodiment. , (B) is the X- line in (b).
A cross-sectional view taken along the X-ray, FIG. 11 (a) is a plan view of the seventh embodiment, FIG. 11 (b) is a plan view in use, and FIG. 11 (c) is XI- in FIG. A sectional view taken along the line XI, FIG. 12 (a) is a plan view of the eighth embodiment, FIG. 12 (b) is XII-X in FIG.
A sectional view taken along line II, FIG. 13C is a sectional view of the same modified example, and FIG. 13 is a plan view showing another example of use. In the figure, (10) is a conductive film, (12) is an electrode, (14) is a terminal,
(16) is a protrusion, (16a) is a dimple, (18) is a tongue for electrode connection, (18a) is its body, (20) is a slit, (22) is a cut and raised piece, (24) Is the protector, (2
6) is a reinforcing rib and (E) is an electric wire.

Claims (1)

[Scope of utility model registration request] 1. A connector for connecting an electrode (12) made of a conductive material foil, which is attached to a conductive film (10) which generates heat when energized, to a terminal (14) on the power supply side, the terminal (14) 1
4) which has a protrusion (16) to be fixed to the protrusion and a tongue (18) extending from the protrusion and formed of a thin conductive metal sheet for connecting electrodes. The protrusion (16) has a shape to be connected and fixed to the terminal (14) to which the electric wire whose coating has been removed is crimped, and the tongue (18) for electrode connection has a width of an electrode. (1
2) has one or more U-shaped cut-and-raised pieces (22) surrounded on three sides by a slit (20) which is slightly larger than the thickness of the electrode (12) of the tongue-like portion. The cut-and-raised piece (22) is pressed and deformed while being inserted between the body portion (18a) and the cut-and-raised piece (22), and is flush with the body portion (18a). A conductive film connector characterized in that it is pressed onto the electrode when restored.