KR101255812B1

KR101255812B1 - Heater for steering wheel

Info

Publication number: KR101255812B1
Application number: KR1020100112716A
Authority: KR
Inventors: 경 태 김; 김동희
Original assignee: 썬텍 주식회사
Priority date: 2010-11-12
Filing date: 2010-11-12
Publication date: 2013-04-17
Also published as: KR20120051329A

Abstract

The present invention relates to a heater for a steering wheel of an automobile, and more particularly, in order to be suitable for attaching a planar heating element in the form of a thin film to a steering wheel having a three-dimensional curved surface, insulated printed conductive wires 30 of a predetermined pattern. In the planar heating element in which a carbon paste layer 22 is formed on the film 21 and the current input connector 40 is connected in parallel to the conductive line 30, the planar heating element has a bar shape having a predetermined length and has an edge. The cutout portion 200 is formed at a plurality of ends, and the conductive wire 30 is provided with a heater for the steering wheel spaced apart from the edge end of the planar heating element and the end of the cutout portion 200 inwardly.

Description

Heater for steering wheel {HEATER FOR STEERING WHEEL}

The present invention relates to a heater mounted on a steering wheel of a vehicle, and more particularly, to a heater for a steering wheel in which a plurality of cutouts are formed on a planar heating element so as to be adhered to the curved surface of the steering wheel of the vehicle without wrinkles.

Recently, as a way to improve the convenience of the car, a technology for promoting comfortable driving by heating the steering wheel of a car, which is cold in winter, has been proposed.

As an example, Korean Patent Laid-Open Publication No. 1997-0040841 (see Patent Document 1) is connected to a heating wire 2 disposed along a steering wheel 1 or a handle cover of an automobile, and one end of the heating wire 2, and the automobile. And an operation switch 3 which allows the driver to arbitrarily open and close the power applied from the battery B of the battery B. Optionally, the switch is electrically connected to the heating wire 2 to close the circuit at the time of overheating with the heating wire 2. A steering wheel heating apparatus of a vehicle in which a temperature control unit 4 or 5 is blocked is proposed.

However, in the case of using a heating wire that generates heat due to electrical resistance, a thermal sensor for preventing overheating and a temperature controller for controlling the power supply to be cut off during overheating must be provided. There is a disadvantage that it is difficult to maintain a constant temperature range is large.

As a result, a PTC (Positive Temperature Coefficient) heater that can maintain a constant temperature is rapidly used when a temperature rises up to a set temperature without a separate temperature sensor. In this regard, the present applicant has filed a patent application (see Patent Documents 2 and 3) in Korea for a planar heating element using PTC carbon paste as a heater attached to a side mirror of an automobile.

As in Patent Documents 2 and 3, a planar heating element using PTC carbon paste is printed on an insulating substrate (film) with a conductor such as silver, copper or aluminum in a predetermined pattern, and after the carbon paste is printed, current input terminals are connected in parallel. As one type of heater, the form is in the form of a thin thin film, so the present applicant intends to apply it to a steering wheel of a vehicle.

As is well known, however, the steering wheel has a donut shape, a circular cross section, and a finger grip portion having a curved surface, such that the surface of the steering wheel is three-dimensional curved. In fact, it is very difficult to apply it to the steering wheel because wrinkles occur even if it is attached.

1. Republic of Korea Patent Publication No. 1997-0040841 2. Korean Patent Registration No. 10-0411401 3. Republic of Korea Patent Registration No. 10-0672810

An object of the present invention for solving the above problems is to provide a heater for a steering wheel of a type suitable for attaching a planar heating element in the form of a thin film to a three-dimensional curved steering wheel.

In the present invention for achieving the above object, in the planar heating element in which a carbon paste layer is formed on an insulating film printed with a conductive line of a predetermined pattern and a current input connector is connected in parallel to the conducting line, the planar heating element is a predetermined length. It is manufactured in the form of a band having a plurality of edges, the cut portion is formed, the conductive line is characterized in that a predetermined distance spaced inward from the edge end of the planar heating element and the end of the cut portion.

In a preferred embodiment, the cutout is formed at equal intervals on both sides of the planar heating element, including slits vertically cut inwardly at the edge of the planar heating element, and inclined slits inclined both sides at the inlet of the slit. It features.

In addition, the cutout is characterized in that it further comprises an end slit inclined inwardly of the planar heating element at the corners of both ends in the longitudinal direction of the planar heating element.

At this time, the cutting width of each slit is preferably narrowed gradually toward the inside of the planar heating element.

In an exemplary embodiment, an auxiliary conductive line extending from the conductive line is further formed between the cutouts.

As an exemplary embodiment, an extension portion in which the insulating film and the carbon paste layer extend in the longitudinal direction is formed at one end of the planar heating element in the longitudinal direction, and a connector is formed in the extension portion.

According to the present invention, the entire surface of the planar heating element is uniform without wrinkles or crying on the steering wheel having a three-dimensional curved surface, since the incision is formed at a plurality of places of the planar heating element and the conductor has a unique pattern installed at a predetermined distance from the slit of the incision. Can be attached.

1 is a perspective view of a heater for a steering wheel according to an embodiment of the present invention.
2 is a plan view of a heater for a steering wheel according to an embodiment of the present invention.
3 is a cross-sectional view taken along line AA of FIG. 2.
4 is a state diagram used in the heater for the steering wheel according to an embodiment of the present invention.

While the present invention has been described with reference to exemplary embodiments, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It should be understood, however, that there is no intention to limit the invention to the form just described, and the spirit and scope of the present invention encompasses the ordinary variations, equivalents, and alternatives of the illustrated forms.

1 is a perspective view of a heater for a steering wheel according to an embodiment of the present invention, Figure 2 is a plan view of a heater for a steering wheel according to an embodiment of the present invention, Figure 3 is a cross-sectional view taken along the line AA of Figure 2, Figure 4 Is a state diagram used in the heater for the steering wheel according to an embodiment of the present invention.

As shown in Patent Documents 2 and 3, the planar heating element using PTC carbon paste is coated with a conductive film such as silver, copper, and aluminum on an insulating film such as PET or PI (polyimide) film, followed by an etching technique. After shaping | molding to a predetermined | prescribed pattern, PTC carbon paste is laminated | stacked on it.

Through this manufacturing method, as shown in FIG. 3, the conductive wire 30 is printed on the insulating film 21, and a planar heating element in which the carbon paste layer 22 is formed thereon can be manufactured. In addition, the planar heating element 20 may form a planar heating element attached to the steering wheel by the adhesive layer 50 by forming an adhesive layer 50 coated with an adhesive on the carbon paste layer 22, in which case the adhesive layer 50 is formed. A normal release paper 60 is attached to the surface to protect the adhesive layer 50.

1 and 2, in order to attach the planar heating element 20 to the steering wheel, the planar heating element 20 is manufactured in a band shape having a predetermined length, and the cutout 200 is provided at a plurality of edges. Is formed.

The cutouts 200 are provided in plural at equal intervals on both sides of the planar heating element 20 at equal intervals, as shown in FIG. 2, and the slits 201 vertically formed inwardly at the edge of the planar heating element 20 and the slit. It includes a pair of inclined slits 202 inclined to both sides at the entrance of the 201, and has a triangular shape similar to that of the trident.

In addition, the cutout 200 may further include an end slit 203 inclined inwardly at an edge portion of both end portions in the longitudinal direction of the planar heating element 20.

In consideration of the fact that the surface of the steering wheel has a donut shape, it is preferable that the cutting width of each of the slits 201, 202, 203 is designed to be gradually narrowed from the edge of the planar heating element 20 toward the inside. Will be apparent from the following description with reference to FIG. 4.

4 is a front and partial enlarged view of the steering wheel 10. As shown in FIG. 4, the steering wheel 10 has a known shape having a donut shape and a circular cross section. Therefore, when the planar heating element 20 is attached to the outer portion of the steering wheel 10 in the longitudinal direction, the planar heating element 20 can be attached without wrinkles along the curved surface of the steering wheel 10 due to the incision, wherein The slits 201, 202 having a width are engaged with each other. Of course, the degree of cutting width of the slits may be appropriately designed according to the diameter of the steering wheel 10 or the curvature of the curved surface.

As shown in FIG. 2, the conductive line 30 pattern is spaced a predetermined distance from the edge end of the cutout 200 to the inside of the planar heating element, including the edge end of the planar heating element 20.

At this time, since the area of the carbon paste layer 22 is relatively wider than the edge of the planar heating element 20 between the cutouts 200, the time may be delayed to reach the set temperature or may not reach the set temperature. Therefore, when the auxiliary conductive line 31 extending from the conductive line 30 between each cutout 200 is allowed to maintain a predetermined pattern, that is, each conductive line 31 at a constant interval, the planar heating element 20 as a whole The surface heats up to a constant temperature and the temperature rise time of each part is also uniform.

Each of the conductive wires 30 is connected in parallel with a pair of connectors 40 through which current is input. In order for the portion in which the connector 40 is installed to be uniformly heated together with the other portion, the planar heating element 20 An extension part 210 which extends the planar heating element 20 in the longitudinal direction may be formed at one end in the longitudinal direction, and the connector 40 may be provided in the extension part 210.

According to this configuration, since the conductive wire 30 is connected in parallel with a pair of connectors 40 for inputting current, the carbon paste layer 22 is applied when the current is applied to both connectors 40. When the carbon paste layer 22 rises to the set temperature when the carbon paste layer 22 generates heat, the resistance rapidly rises to block the flow of current so as not to rise above the set temperature.

Although one embodiment of the present invention has been illustrated and described above, the present invention is not limited to the above-described specific embodiments, and the present invention as claimed in the claims, such as changing and mixing some of the components of the embodiments. Various modifications can be made by those skilled in the art without departing from the gist of the present invention, and such modifications should not be individually understood from the technical spirit or the prospect of the present invention. .

10 ... steering wheel 20 ... planar heating element
21 Insulation film 22 Carbon paste layer
30 ... conductor 40 ... connector
50 ... adhesive layer 60 ... release paper
200 ... incision 201 ... slit
202 ... slant slit 203 ... end slit
210 ... Extension

Claims

For a steering wheel made of a planar heating element in which a carbon paste layer 22 is formed on an insulating film 21 on which a conductive line 30 of a predetermined pattern is printed and a current input connector 40 is connected in parallel to the conductive line 30. In the heater,
The heater for the steering wheel is in the form of a band having a predetermined length, the incision 200 is formed in a plurality of places of the edge end,
The conductive wire 30 pattern is installed at a predetermined distance spaced inward from the edge end of the heater for the steering wheel and the end of the cutout 200,
The cutout 200 is formed at equal intervals on both sides of the steering wheel heater,
A heater for a steering wheel comprising a slit (201) cut inwardly perpendicularly from an edge of a heater for a steering wheel and a pair of inclined slits (202) inclined in both directions at an inlet of the slit (201).

delete

The method according to claim 1,
The cutout 200 is a steering wheel heater, characterized in that it further comprises an end slit cut inclined inwardly of the heater for the steering wheel at the corners of both ends in the longitudinal direction of the heater for the steering wheel.

The method according to claim 1 or 3,
And the cutting width of each slit gradually narrows inward from an edge of the heater for the steering wheel.

The method according to claim 1,
A heater for a steering wheel, characterized in that the auxiliary conducting line (31) extending from the conducting line (30) is further formed between each cut.

The method according to claim 1,
Heater for a steering wheel, characterized in that the extension portion 210 is formed with an extension of the surface heating element is formed at one end in the longitudinal direction of the heater for the steering wheel, the connector (40) is formed in the extension portion (210).