JPS6173617A - Seat heater for vehicle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a seat heater for a vehicle that heats the seat of an automobile or the like.

Conventional configurations and their problems In recent years, vehicle seat heaters equipped with heater units have been increasingly used to heat the seats of automobiles during the winter. Safety measures have become an important issue.

Therefore, conventionally, a safety measure has generally been used in which a plurality of thermostands are built into the heater unit.

Hereinafter, conventional vehicle seats will be explained with reference to FIGS. 1, 2, and 3.

In FIG. 1, reference numeral 1 indicates the seat portion of the seat, and 2 indicates the back portion, each of which is equipped with a heater unit 3.4 to heat the seating portion.

7.8 is a thermostand of a temperature controller connected in series to the heater units 3 and 4. 5.6 is the main pad for the seat and back.

FIG. 2 shows the heater unit 3 mounted on the seat 1, and the heating wires 9 near the thermostat 7.8 are arranged in a meandering manner and are densely wired.

FIG. 3 shows the electrical circuit diagram of the heater unit 3.4.

The operation of the conventional vehicle seat heater configured as described above will be described below.

First, if the temperature inside the vehicle is lower than the operating temperature of the thermostat 7.8, the vehicle battery power source 11 is connected to the heating wires 9.10 of the seat heater unit 3 and the back heater unit 4 through the thermostat 7.8. Electricity is applied to warm the seat 1 and back 2 of the newborn baby.

The boom-socket door 8 is heated by heating wires 9a and 9b which are meandered and closely wired nearby.
When the operating temperature of the thermostand 7.8 is reached, the boom-mounted door, 8 is made by ○FF#J, and each heater unit 7
) 3. Stop power supply to 4.

Here, since the thermostands 7.8 are connected in series, when one of them performs the FF operation, the power supply to the heater unit 3.4 is stopped. That is, the other thermostand is a protector, and is used to prevent overheating in the event that one of the thermostats 7) is short-circuited.

That is, the thermostats 7.8 set the heating temperatures of the seat portion 1 and the back portion 2, and also have the role of preventing overhumidification in the event that one of them is short-circuited.

In general, thermostats 7.8 that have the same operating temperature are used.
Heat-generating wires 9a, 9 are placed at the seam of the
By wiring b closely. Therefore, a method of forcibly raising the temperature is used.

Therefore, such a conventional configuration has the following problems.

Example: Even if the passenger is not present (not seated), there is a risk of overheating if the heater unit 3.4 is energized and heat-insulating items such as 7-pieces are left on the seat.

(a) In addition, especially in the case of vehicles, the operating conditions of the heater unit may range from room temperature to -30°C, so even in such cold regions, the thermostat 7.8 is set to 0.
It is necessary to wire the heating wires 9a and 9b so as to have enough temperature raising capacity for FF operation and to ensure safety.

Unfortunately, during normal use, the temperature inside the vehicle rises, so the time it takes for thermostands 7 and 8 to reach OFF operation becomes shorter, which may impair the heating effect. Ta.

(ri) obedience. Therefore, from a safety standpoint, it is necessary to forcibly increase the raising capacity using the heating wires 9a and 9b to ensure the FF operating temperature of the thermostat 7.8 even at a low temperature of -30"C, which will conversely impair the heating effect. To avoid this, it is necessary to moderate the heating capacity.

(Engineering) In this way, vehicle seat heaters are used in different environments than heating equipment used in general homes, and can be used in extremely cold regions ranging from room temperature to -30"C. It was difficult to come up with a design that satisfied both.

Incidentally, it is already known that a switch 23 is provided on the seat part 22 of a chair, an electric foot, etc. as shown in FIG. 4, but in this case, the purpose is simply to prevent forgetting to turn off the switch.
It has nothing to do with the heating effect. Seat heaters and vehicle seat heaters may be used in extremely cold regions ranging from room temperature to 130"C, or may be left unattended for long periods of time due to heat insulators being placed on them. In particular, safety is prioritized and the heating effect, which is the original function, is prioritized because it is extremely dangerous, and it is not possible to place a safety lug on the seating surface because the cushioning properties and the feeling of a foreign object when sitting will affect driving. spoil.

Purpose of the Invention In view of the above-mentioned problems, the present invention provides a seat heater for a vehicle that ensures safety by stopping power supply to the heater unit when no occupant is present, and that improves the heating effect. .

Structure of the Invention To achieve this object, the vehicle seat heater of the present invention includes a heater unit mounted on the seat, a temperature controller that controls the temperature of the heater unit, and a temperature controller that detects when a passenger is seated and controls the heater unit. It consists of a switch that opens and closes the energized circuit.

With this configuration, if the passenger is absent (not seated), power to the heater unit is automatically stopped, so safety can be ensured even if a heat-insulating object is left on the seat in any atmosphere, so the temperature The controller can be designed to focus only on the heating effect.

DESCRIPTION OF EMBODIMENTS An embodiment will be described with reference to the drawings.

FIG. 5 shows a sectional view of a seat portion of a vehicle seat heater according to an embodiment of the present invention.

z In Fig. 5, 13 is a main pad, - middle is a switch arranged with a concave part provided in the approximate center of the main pad 13,
Here, an example will be shown in which a microswitch is used to detect when a passenger is seated. Reference numeral 16 is a tong unit that is inserted between the skin 15 and the cushion material 14.

FIG. 6 is an enlarged sectional view of the microswitch 12 in FIG. 4, showing a case where no occupant is present (not seated). In this case, the microswitch 12 is the actuator 1
2a [Micro switch 12t/ because no load is applied
i does not operate, and power supply to the heater unit 16 is stopped.

Figure 7 shows the situation when the occupant is seated.
In this case, the actuator 12 of the microswitch 12
Since a load is applied to a and the microswitch 12 is activated, the heater unit 16 is energized.

FIG. 8 shows an electric circuit diagram in which the microswitch 12 is connected in series to the on-vehicle battery power source 11 and the energizing circuits of the heater units 3 and 4.

7 is a thermostat as a temperature regulator that controls the temperature of the heater unit; 9.9aI-i heating wire of the seat; 10
is the heating wire on the back, and the above structure is the same as that shown in Fig. 3.

That is, if the occupant is absent (not seated), the microswitch 12 will not operate, so the current supply circuit to the heater unit 3.4 will be opened and the power supply from the battery power source 11 will be stopped.

When the occupant is seated, the microswitch 12 is activated, and power supply from the battery power source 11 to the heater unit 3.4 is started.

As described above, according to this embodiment, by energizing the heater units 3 and 4 only when the occupant is seated, safety can be ensured in any atmosphere.

Therefore, it is possible to design the wiring of the heating wire 9a in the vicinity of the thermostat l-f of the temperature controller so as to obtain the optimum temperature raising ability considering only the heating effect when the passenger is seated.

9 to 14 are enlarged cross-sectional views of another embodiment in which the switch 12 is disposed in a recess 17 provided approximately at the center of the main pad 13 of the seat. It goes without saying that configurations other than these configurations can also be adopted as appropriate and necessary.

FIG. 9 shows an example in which a recess 17 smaller than the outer shape of the switch 12 is provided in the main pad 13, and the switch 12 is placed within the recess 17.

FIG. 10 shows that a recess 17 is provided in the main pad 13 at the same height as the switch 12 or deeper than the height of the switch 12.
This is an example of putting it inside.

Fig. 11 shows that the main pad 13 is provided with a recess 17 having a notched groove 19, and the notch t; This is an example in which the 7-ohms 18 are arranged with a space provided between them and the switch 12.

In FIG. 12, a recess 17 larger than the switch 12 is provided in the main pad 13, and the switch 12 is inserted into the recess 17 in advance.
This is an example in which a switch section 2o in which a switch section 2o is embedded is provided.

Figure 13 shows a recess 17 with a two-stage structure in the main pad 13.
(!: 17a ヲfl(ke, actuator 12a of switch 12) This is an example in which the actuator 12a is arranged in the opposite direction to the side facing the main pad.

FIG. 14 shows an example in which a concave portion 17 is provided on the back surface of the main pad 13, and a switch 12 fixed to a support base 21 is disposed therein.

Next, the effects of these embodiments will be described in order.

In the case of FIG. 9, the switch 12 can be fixed with the simplest configuration.

In FIG. 10, since the switch 12 is located below the surface of the main pad 13, the feeling of a foreign object when sitting can be reduced.

Figure 11 shows the switch 12 which eliminates the feeling of a foreign body when sitting.
operations can be performed more reliably.

In FIG. 12, since the switch portion 2o can be configured in advance, fixing and operation are more reliable, and the feeling of a foreign body when sitting in a shared seat can be eliminated.

Figure 14 shows the switch 1 which completely eliminates the feeling of a foreign body when sitting.
2 can be fixed securely.

Effects of the Invention As described above, the present invention can obtain the following effects by detecting the occupant's seating using a switch disposed in the seat and opening/closing the energizing circuit to the heater unit.

■ The heater unit is energized only when the passenger is seated, greatly improving safety.

That is, even if a heat insulating object is left on the seat, no electricity is applied to the heater unit, so there is no fear of overheating, and safety can be ensured.

■ Unlike conventional methods, there is no need to forcibly increase the temperature raising capacity of the thermostat to ensure safety at low temperatures.

■ Therefore, the 1M degree regulator can be designed considering only the heating effect of the heating section, which solves the conventional problem that during normal use, the time it takes for the thermostat to reach ○FF#J operation is shortened, which impairs the heating effect. can.

[Brief explanation of drawings]

FIG. 1 is a partial cross-sectional configuration diagram of a seat equipped with a conventional heater unit, FIG. 2 is a plan view of the conventional seat heater unit, and FIG. 3 is an electric circuit diagram of the conventional heater unit. Fig. 4 is a '8IIJ curve diagram of a conventional example, Fig. 5 is a sectional view of a seat part of an embodiment of the present invention, and Figs. 6 and 7 are enlarged sectional views of a switch part of an embodiment of the present invention. , FIG. 8 is an electrical circuit diagram of one embodiment of the present invention. 9 to 14 are enlarged cross-sectional views of an embodiment in which a concave g (ζ) is provided in the main pad and a switch is arranged. 1...Seat part, 2...Back part, 7...
...Temperature controller, 12...Switch, 13...
...Main pad, 16...Heater unit, 17...Recess. Name of agent: Patent attorney Toshio Nakao and one other name
・ 14th 2nd! CD
C' faction 9th mountain ((L)
(b) Figure 10 (Oshin
(b) Figure 11 (α) (b) W, Figure 12) (b) :I: Figure 13 ('') (b) 1'1 Figure 14

Claims (5)

[Claims] (1) For vehicles configured to include a heater unit attached to a seat, a temperature controller for the heater unit, and a switch placed on the seat, the switch opening and closing the energizing circuit to the heater unit. Seat heater. (2) The vehicular seat heater according to claim 1, wherein the switch is disposed in a recess provided approximately in the center of the main pad of the seat portion of the seat. (3) The vehicular seat heater according to claim 1, wherein the switch is disposed in a recess smaller than the switch provided substantially in the center of the main pad of the seat portion of the seat. (4) The vehicular seat heater according to claim 1, wherein the switch is disposed in a recess having a notched groove provided approximately at the center of the main pad of the seat portion. (5) The vehicle seat heater according to claim 1, wherein the switch is arranged in a recess provided on the back side of the main pad of the seat portion of the seat.