JPH0132910Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a heated vehicle seat.

For example, in the automobile seat 1 shown in FIG.
It is known that a heating wire (heater) 3 is arranged on the inner surface of the skin 2 to heat the occupant M.

In this case, the temperature of the sheet 1 is controlled using a heat-sensitive element 4;
is placed near the joint of the seat portion 1a with the seat back 1b (near a in Fig. 1), so that the occupant M
Moreover, there is a problem in that the heat is easily radiated from the space S at the corner of the joint, and the temperature is detected as lower than the temperature actually transmitted to the passenger M.

Therefore, if the heat-sensitive element 4 is placed directly below the buttocks of the occupant M (range b in the figure), the heat-sensitive element 4 will always be in close contact with the body since the occupant M is normally held by the seat belt B, but the entire weight of the occupant will be transferred to the heat-sensitive element 4. Joining element 4,
There is a problem in that the durability is impaired.

It may be possible to avoid concentration of weight by placing it close to the rear of the occupant's buttocks (near c in the figure), but due to differences in occupant body shape and seating posture, the space S
It may be located in

Furthermore, when the seat bag is placed inside the seat bag 1b, depending on the seating position, it may not be in close contact with the occupant's body, which is inappropriate.

The purpose of the present invention is to solve the above-mentioned problems by disposing the heat-sensitive element 4 at a position close to the seat skin, and dividing the longitudinal length L of the seat portion 1a of the seat 1 into approximately four equal parts. However, it is located within a range L1 of approximately 3/4 of the front part thereof, and is disposed at a position corresponding to the lower part of the thigh M1 of the occupant M.

As shown in FIGS. 2 and 3, the heating wire 3 in the illustrated example is
A heating element unit 7 is constructed by arranging a plurality of heating wire circuits 3a, 3b on a core body 5, and pasting cloths 6a, 6b on both sides thereof. For example, a heating element 3 is placed between the core body 5 and the lower cloth 6b in the unit 7.
A heat-sensitive element 4 such as a thermistor is placed in close proximity to.

Then, as shown in FIG. 4, the unit 7 is inserted into the seat skin 2 through an opening 8 formed at the rear of the seat skin 2, and the heat-sensitive element 4 is placed at a position corresponding to the lower part of the thigh M1 of the occupant M. (Figure 1).

The position may be either the left or right thigh of the occupant M. Further, it is set at an arbitrary position within a range L1 of approximately 3/4 of the front portion of the length L in the longitudinal direction of the seat portion 1a, avoiding the buttocks M2 of the occupant M, etc.

Reference numeral 9 in FIG. 2 is a temperature control device for maintaining the temperature of the heat generating unit 7 at a predetermined temperature selected by the passenger, and converts changes in the temperature of the heat sensitive element 4 into an electrical signal via a comparator or the like. , In response to the signal, the power supply E is turned on and off to the heating wire 3 to automatically control the temperature to the above-mentioned predetermined temperature.

10 is a switching device that automatically switches and controls the energization to the plurality of heating line circuits 3a, 3b at set time intervals, for example in a tie, and 11a, 11b are provided in each of the circuits 3a, 3b to prevent overheating. This is an automatic reset type breaker. In FIG. 1, 12 indicates a cushion pad, and 13 indicates a reclining mechanism.

As described above, the present invention positions the heat-sensitive element 4 close to the seat skin, and the seat part 1a of the seat 1.
Since the heat-sensitive element 4 is placed in a position corresponding to the lower part of the thigh of the occupant M within a range L1 of about 3/4 of the front part of the longitudinal length L of Accurate temperature control is possible by detecting the temperature transmitted to the occupant's body, and the occupant's weight is not concentrated as in the case where the heat-sensitive element 4 is placed at the buttocks, so the heat-sensitive element is placed close to the seat skin. There is no foreign body sensation even when the heat-sensitive element is heated, and it has the effect of preventing damage to the heat-sensitive element and increasing its durability.

[Brief explanation of drawings]

Fig. 1 is a side view of the heated vehicle seat of the present invention, Fig. 2 is a plan view of the heating element unit, Fig. 3 is a cross-sectional view thereof, and Fig. 4 is a plan view of the heating element unit attached to the seat. It is a diagram. 1 is a sheet, 2 is a skin, 3 is a heating element, 4 is a heat-sensitive element, and 7 is a heating element unit.

Claims (1)

[Scope of utility model registration request] In a vehicle seat equipped with a heater in which heating wires are arranged on the inner surface of the seat surface, the heat-sensitive element for controlling the temperature of the seat is located close to the seat surface and in the longitudinal direction of the seat portion of the seat. A vehicle seat equipped with a heater, which is located within approximately 3/4 of the front part of the vehicle's length, corresponding to the lower portion of the occupant's thighs.