JP3304496B2 - Temperature sensor for cooker - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a temperature sensor for a cooker for detecting the temperature of an inner pot, which is an object to be heated, in a rice cooker comprising an outer pot and an inner pot detachable from the outer pot. About.

[0002]

2. Description of the Related Art FIG. 2 shows an embodiment of a conventional temperature sensor for a cooking appliance. A thermal element 4a is formed by the lid 1a, the holder 2a, the inner case 20, and a temperature-sensitive element (thermistor) 3a. The temperature-sensitive element 3a is protected by a protective tube 21 in a recess 5a provided in the holder 2a. It is installed. A terminal 22 is fixed to the lower portion of the holder 2a with an adhesive or the like after being press-fitted or inserted. The lead 6a of the temperature sensing element 3a is spot-welded to the terminal 22.
The lead of the detecting element (lead switch) 7a is spot-welded, and the lead wire 8a is spot-welded. After the lead wire 8a is spot-welded to the terminal 22, the lead wire 8a is hooked on the locking portion 9a of the holder 2a, and then led out. The holder 2a fits inside the inner case 20 and is covered with the lid 1a.
The holder 2a is fixed in the inner case 20, and
a is formed. The outer case 10a includes a magnet holder 23 on which the permanent magnet 11a is mounted. The thermal element 4a is connected to the coil spring 12a via the coil spring 12a.
Cut-and-raised portion 24 is formed in slit hole 25 of outer case 10a.
And held movably in the vertical direction.

[0003]

As described above,
The conventional structure as shown in FIG. 2 has a drawback that the number of parts is large and the work efficiency at the time of assembly is poor. Therefore, an object of the present invention is to provide a structure capable of solving these drawbacks.

[0004]

As shown in FIG. 1, a temperature sensor for a cooking appliance according to the present invention comprises, as shown in FIG. 1, a permanent magnet 11 for operating a reed switch 7a which is a component of the heat-sensitive body 4 of the cooking appliance temperature sensor. A guide 29 and a slide surface 3 are attached to the holder 2 so that the holder 2 can be smoothly moved up and down with respect to the permanent magnet 11.
2, the permanent magnet 11 is mounted on the side surface of the outer case 10, so that the magnet holder for mounting the permanent magnet, which is conventionally used, is eliminated, and the number of parts is reduced.

Further, the work time can be shortened by connecting the lead wires 6 and the lead terminal wires 8 of the temperature sensing element 3 and the lead switch 7 respectively by the crimp terminals 26 at a time, and then mounting the lead wires to the holder 2. . Also, crimp terminal 26
The lead wire is inserted into the locking portion 9 provided on the holder 2 and hooked, thereby increasing the tensile strength of the lead wire 8.

According to the present invention, the heat-sensitive body is moved by the mounting of the heated body, and the presence or absence of the heated body is detected by a reed switch provided on the heat-sensitive body, and the temperature of the heated body is changed to the heat-sensitive body. A cooker temperature sensor that is detected by a provided temperature-sensitive element, and is provided on a side surface of a holder constituting the heat-sensitive body so that the holder can easily move up and down with respect to a permanent magnet that operates the reed switch. A surface sensor and a guide, and a permanent magnet for operating the reed switch is mounted on a protrusion provided on a side surface of the outer case. Cooking characterized by combining the terminal wires into crimp terminals and crimping the connections, and inserting and fixing the lead wires to the locking parts provided on the holder that constitutes the thermal element It is a use temperature sensor.

[0007]

[Function] A permanent magnet is mounted on the outer case, a guide is provided on the side of the holder to allow the permanent magnet to slide relatively, and instead of the magnet holder, the magnet holder is eliminated, reducing the material costs and reducing work. The time is also shortened, and the work time is further shortened by connecting the temperature-sensitive element, the detecting element and the lead wire and then mounting the element on the holder.

[0008]

1 shows a temperature sensor for a cooking appliance according to the present invention. The heat sensing element 4 is mounted on the outer case 10 via a coil spring 12 and is movable in the vertical direction. The thermal element 4 includes a lid 1, a protective sheet 27, a holder 2, a temperature-sensitive element (thermistor) 3, a detecting element (lead switch) 7, a crimp terminal 26, and a lead terminal wire 8. A concave portion 5 for mounting a temperature sensing element is formed on the upper surface of the holder 2, and a guide 29 for sliding the permanent magnet 11 is formed on the side surface.
Is provided. A locking portion 9 is provided below the hollow portion 30 of the holder 2, and the crimp terminal 26 is fixed to the locking portion 9 by fitting the lead terminal wire 8 into the locking portion 9.

Temperature sensing element 3, detecting element 7, and lead terminal wire 8
Are connected by crimping terminals 26 outside the holder 2, the temperature-sensitive element 3 is mounted in the concave portion 5 on the upper surface of the holder 2, and the lead terminal wires 8 are fitted into the locking portions 9. Here, the locking portion 9 has a groove having a groove width larger than the outer diameter of the lead terminal wire 8 and smaller than the crimp terminal 26.
6 is fixed so as not to be hooked and come off. afterwards,
The thermosensitive element 4 is formed by leading the lead terminal wire 8 to the outside, protecting the thermosensitive element 3 with the protective sheet 27, and pressing the lid 1 to the holder 2. The thermal element 4 is a permanent magnet 11
Is mounted on a projection 31 provided on the inner side surface of the outer case 10 and fixed with an adhesive or the like, and then inserted into the outer case 10 via the coil spring 12, and is vertically moved by a hook 28 provided on the holder 2. The temperature sensor for a cooker of the present invention is completed by being supported by the outer case 10 so as to be movable downward.

[0010]

As described above, according to the present invention, the permanent magnet is mounted on the outer case, and the slide surface and the guide are provided on the holder, thereby eliminating the need for the magnet holder, thereby reducing the material cost and the magnet holder. The work time for installation of the sensor can be shortened, and by connecting the temperature sensing element, detection element and lead wire to the holder, the work time can be shortened and manufacturing becomes easier, making it possible to use it for low-cost cookers. A temperature sensor can be provided.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing a structure of a temperature sensor for a cooking appliance according to the present invention. FIG. 1A is a plan view. FIG.
FIG. FIG. 1 (c) is a cross-sectional view of FIG.
A front sectional drawing. FIG. 1D is a cross-sectional front view taken along the line BB of FIG. FIG. 1E is a cross-sectional plan view taken along the line CC of FIG. 1C.

FIG. 2 is an explanatory view showing the structure of a conventional temperature sensor for a cooking appliance. FIG. 2A is a plan view. FIG. 2B is an external front view of FIG. 2A. FIG. 2C is a front sectional view taken along the line AA of FIG. FIG. 2D is a front sectional view taken along line BB of FIG. 2A.
FIG. 2E is a plan view of the cooker temperature sensor viewed from the bottom surface direction.

[Explanation of symbols]

 1,1a Lid 2,2a Holder 3,3a Temperature Sensitive Element (Thermistor) 4,4a Heat Sensitive Element 5,5a Recess 6,6a Lead Wire 7,7a Detecting Element (Lead Switch) 8,8a Lead Terminal Wire 9,9a Stop portion 10, 10a Outer case 11, 11a Permanent magnet 12, 12a Coil spring 20 Inner case 21 Protective tube 22 Terminal 23 Magnet holder 24 Cut-and-raised portion 25 Slit hole 26 Crimping terminal 27 Protective sheet 28 Hook 29 Guide 30 Hollow portion 31 Projection 32 slide surface

Continuation of the front page (56) References JP-A-1-293810 (JP, A) JP-A-1-265919 (JP, A) JP-A-6-313137 (JP, A) , U) Fully open 1988-39321 (JP, U) Fully open 1432-1329 (JP, U) Fully open 1987-130518 (JP, U) Fully open 1986-133939 (JP, U) 7-27414 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01K 1/14 A47J 27/00 103

Claims (2)

(57) [Claims] 1. A thermosensitive body moves by mounting a heated body, and the presence or absence of the heated body is detected by a reed switch provided on the thermosensitive body, and the temperature of the heated body is provided to the thermosensitive body. In a temperature sensor for a cooker detected by a temperature-sensitive element, a permanent magnet for operating a reed switch provided on the heat-sensitive body is mounted on a protrusion provided on an inner surface of an outer case, and on a side surface of a holder constituting the heat-sensitive body, A temperature sensor for a cooking appliance, wherein a slide surface and a guide are provided so that the holder can slide up and down with respect to the permanent magnet. 2. The lead wire and the lead terminal wire of each of the reed switch and the temperature sensing element are collectively crimped and connected to a crimp terminal, and the lead terminal wire is fitted into a locking portion provided on a holder constituting the heat sensitive body. The cooker temperature sensor according to claim 1, wherein the temperature sensor is fixed.