JPS60259211A - 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 vehicle seat heater that is attached to a vehicle seat and heats the seat.

Structure of the conventional example and its problems In the conventional vehicle seat heater of this type, as shown in Figs. Wire in the shape of
A seat heater main body 4 is constructed by thermocompression-bonding outer fabric 3 coated with hot-melt adhesive onto both sides of the core body 1 by means such as a heat press, and a part of the seat heater main body 4 is provided with a seat heater heating section. A thermostat 5 is installed so as to directly sense the heat of the heater 2, and a lead wire 6 is connected to the thermostat 5 and the heating heater 2. A connection plug 7 is provided to be connected to the The seat heater main body 4 is attached to a seat portion 8a and a backrest portion 8b of a vehicle seat 8, respectively, as shown in FIG. As shown in FIG. 4, the seat heater main body 4 is installed by inserting it between a pad 9 made of urethane foam and a cushion material 10 made of urethane foam. Further, in the heating section, it is inserted directly under the skin 11 of the seat, that is, between it and the cushion material 10.

However, in the conventional configuration described above, the temperature of the heater 2 is detected and the heater 2 is energized.

Since the thermostat 5 that controls de-energization is attached to a part of the seat heater body 4, and this seat heater body 4 is attached to the vehicle seat 8, when the user sits on the vehicle seat 8, the thermostat 5 is turned off. As a result, when the user sits on the seat 8, the thermostat 5 gives the user a feeling of a foreign body.

In order to remove this foreign body feeling, the user should remove the parts that do not come into contact when sitting on the vehicle seat 8, that is, the part where the seat part 8a and the backrest part 8b of the vehicle seat 8 overlap, or the user's crotch. However, in general, when installing a safety device where the seats overlap or even in the user's crotch area, the main thermostat, etc., is installed on the vehicle seat side. Depending on the insertion position, it may hit the human body's buttocks.The biggest problem is that the vehicle seat 8a does not have a backrest 8b.
This adds to the stress several times over. In addition, when the main thermostat is installed in the vehicle seat in this way, the buttocks of the human body come into contact with it, or mechanical stress is caused by the buttocks, which may cause the thermostat's set temperature to become unsafe over time. .

Purpose of the Invention In view of the above-mentioned conventional problems, the present invention provides a stable heating heater that does not give the user the feeling of a foreign body when sitting on the seat, and is independent of the shape of the vehicle seat or the stress caused by the human body. The object of the present invention is to provide a vehicle seat heater that can be controlled in a safe state and that is safe.

Structure of the Invention In order to achieve the above object, the present invention provides a pair of seat heater bodies attached to the seat and backrest of a vehicle seat under the skin of the vehicle seat, and the temperature of the heating heater is set. A control unit such as a thermostat that stops power supply to the heater when the temperature exceeds the temperature is disposed in the backrest of the vehicle seat. According to this configuration, when the temperature of the heating heater exceeds the set temperature, the heater is turned off. Since the control unit for the thermostat, etc. that turns off the electricity is not located on the vehicle seat side, there is no chance of foreign objects being thrown in when the user sits on the vehicle seat, and there is no possibility of the thermostat being sown due to the durability stress caused by the user's buttocks. This will reduce the amount of change in the set temperature. Moreover, even if the shape of the vehicle seat changes over time, the shape of the backrest does not change as much as the seat, and cushions, thick seat covers, clothing, etc. are left behind with the heater turned on. Even if the vehicle seat heater is kept warm, the controller such as the thermostat stops powering the heater when the temperature of the heating heater exceeds the set temperature, which prevents a dangerous situation from occurring. Therefore, it is possible to provide a vehicle seat heater that operates reliably in a stable state and has high safety, such as being able to prevent accidents.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 5 to 8. Note that in FIGS. 5 to 8, the same parts as in FIGS. 1 to 4 shown in the conventional example are given the same numbers, and only the points that are different from the conventional example will be explained. That is, in one embodiment of the present invention, as shown in FIG. A lead wire 6 is drawn out, and a connection plug 7 is provided at the end of this lead wire 6. Furthermore, this connection plug 7 is detachably attached, and when the temperature of the heating heater 2 becomes higher than the set temperature. , a control section 12 is provided to stop the power supply to the heater 2. This control unit 12 includes a plurality of thermostats 14 and a plurality of thermostats 14 in the vicinity thereof.
Thermo auxiliary heater section wired more densely than the heating section, 2
It is composed of 2°23. FIG. 6 is a sectional view of the seat showing the normal state of the seat when seated;
FIG. 7 is a layout diagram of the seat heater main body attached to the seat. In FIG. 7, the seat heater 24 disposed on the seat 8a is inserted between the notch 26 of the cushion material 10 and the seat skin 11. A seat heater second base placed on the backrest 8b is also placed in the same manner.

At this time, the control section 12 corresponding to a portion of the thermostat 14 is arranged between the cushion material 10 and the pad 9. Further, the thermostat 14 is locked by pulling the skin 11' so that it is buried in the pad 9. As a result, the position of this thermostat 14 is
It is arranged in a part out of line with the human body contacting part 33. Therefore, the position of the notch 26 in the cushioning material 10 has an important meaning.

Moreover, by using the thermostat 14 as the backrest portion 8b, the seat surface is pulled in the direction of FIG. 7 due to the vertical vibration of the human body's own weight, thereby preventing stress on the thermostat 14. In other words, the backrest portion 8b
There is almost no stress applied to the lower back area of the body. Therefore, the thermal atmosphere can always be kept constant.

27 is a pipe-shaped seat frame of the backrest portion 8b; 28;
29 are seat springs, 30 are fasteners for fixing the skin 11 and 11, 31 is a wire inserted into the end of the skin, and 32 is extending from the seat frame. The notch is shown.

FIG. 8 shows a circuit diagram of a vehicle seat heater according to an embodiment, in which two thermostats 14 are connected in series, and an auxiliary heater 17 is arranged near each thermostat. The auxiliary heater 17 and the pair of heating heaters 2 are connected in series. Note that the pair of heating heaters 2 and the auxiliary heater 17 are each connected in parallel.

Further, the backrest seat heater 24 attached to the seat portion 8b of the vehicle seat 8 corresponds to one thermo-auxiliary heater portion 22 that is thermally connected to the backrest portion attached to the seat portion 8a of the vehicle seat 8. The section seat heater 25 corresponds to the other thermo-auxiliary heater section 23. By doing so, even if one of the seat heaters 24 or 25 is disconnected for some reason, the other thermostat and auxiliary heater section will operate normally. Furthermore, since the two thermostats 14 are connected in series, the current flows through the two stages of thermostats 14, thus creating a double safety circuit.

In the above-mentioned embodiment, the control unit 12, which includes a thermostat 14, etc., which stops energizing the heater 2 when the temperature of the heating heater 2 exceeds a set temperature, is mounted on the backrest 8b of the vehicle seat 8 and on the lower back of the human body. Since the controller 12 is located in a corresponding area, the user does not feel like a foreign body when sitting on the vehicle seat 8, unlike in the conventional case where a thermostat is installed in the vehicle seat. ,
Since it is not affected by the heat caused by the shape and condition of the vehicle seat 8 and the configuration shown in FIG. 4, it is possible to obtain a thermotimer that always repeats on-off at a constant time.

Effects of the Invention As described above, according to the present invention, a control unit such as a thermostat that stops energizing the heater when the temperature of the heating heater exceeds a set temperature is located on the vehicle seat side as in the conventional case. This eliminates the feeling of a foreign body when the user sits on the vehicle seat, and even if changes occur over time, such as in the shape of the padding in the vehicle seat, there is no need to adjust the corresponding thermostat as in the past. It is no longer necessary to set the temperature of the control unit, etc., and a stable thermal atmosphere is maintained.

Even if the vehicle seat heater is kept warm due to clothes being left behind, the control unit such as the thermostat is designed to stop energizing the heater when the temperature of the heating heater exceeds the set temperature. It is possible to provide a vehicle seat heater that operates reliably in a stable state and has high safety, such as being able to prevent a dangerous situation from occurring.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional vehicle seat heater;
The figure is a sectional view taken along the line A-A in Fig. 1, Fig. 3 is a perspective view of a vehicle seat equipped with the same seat heater, and Fig. 4 is a sectional view taken along the line B-A in Fig. 3.
5 is a sketch of a vehicle seat heater showing an embodiment of the present invention, and FIG. 6 is a cross-sectional view of the seat in FIG. 3.
7 is an enlarged sectional view of the seat heater shown in FIG. 6 when it is inserted, and FIG. 8 is an electric circuit diagram of the seat heater. 2... Warming heater, 6... Lead wire, 7... Connection plug, 8... Vehicle seat, 8a... Seat Part, 8b...Backrest part, 12...Control unit, 14...Thermostat, 17...Auxiliary heater, 24.25.
... Seat heater. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 4 Figure 5 Figure 6 Figure 4 Figure 7 Figure 8

Claims (2)

[Claims] (1) A pair of seat heater bodies attached to the vehicle seat and backrest, and a control unit such as a thermostat that stops power supply to the heaters when the temperature of the heating section heater of the pair of seat heater bodies exceeds a set temperature. , comprising a lead wire connecting the control unit and the heating heater, and mounting the pair of seat heater bodies under the skin of a vehicle seat;
and a vehicle seat heater, wherein the control section is disposed in the backrest portion. (2) The control unit for controlling the temperature of the heating heater is constituted by a thermostat having a temperature-sensing unit and an auxiliary heater located near the thermostat, and is disposed in a portion of the backrest corresponding to the waist. The vehicle seat heater according to item 1.