JP2600660Y2 - 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 cooking appliance.

[0002]

2. Description of the Related Art Conventionally, this type of cooker temperature sensor has
It is incorporated in a cooker such as a rice cooker in which a detachable inner pot is stored in an outer pot, and detects an abnormal temperature of the inner pot.

Referring to FIG. 5, a conventional temperature sensor for a cooking appliance has a lid 13, a substantially cylindrical top made of an insulator, a detecting element 23 for detecting an inner pot, and a temperature-sensitive element 1.
1; a cylindrical inner case 15 for housing and supporting the holder 14a; and an outer case 16 that is slidably fitted to the inner case and fixed to the outer pan. ing.

The heat sensitive body 14 is assembled by storing the holder 14 a in the inner case 15, closing the upper end of the opening with the lid 13, and then crimping the side edge of the lid 13. The lid 13 is disposed so as to be in contact with the bottom of the inner pan, and transfers the heat of the inner pan to the temperature sensing element (thermistor) 11 in the heat sensitive body 14.

[0005] The holder 14a of the thermal element 14 is provided with a concave portion 14-1 on the upper surface of the top. Recess 14-1
Contains a temperature-sensitive element 11 covered with a protective tube 20 made of a material having good thermal conductivity. After the terminals 19 and 19 are pressed into the side wall of the holder 14a,
It is fixed with an adhesive or the like. The lead wire 21 is connected to this terminal 1
After being spot-welded to the holders 9 and 19, the holders 14a are hooked on the locking portions 22 and are led out through holes in the arc-shaped portions below the holder 14a. Further, the holder 14a holds a reed switch 23 acting as a detection element at a lower portion. The leads at both ends of the reed switch 23 are spot-welded to the terminals 19, 19, respectively.

The inner case 15 has three projections 15b at the bottom.
It has. The thermal element 14 is loosely inserted inside the coil spring 15a.

On the bottom surface of the outer case 16, three slit holes 16a for accommodating the projections 15b are formed, and a permanent magnet support plate 17 for supporting permanent magnets 25 and 26 for driving the reed switch 23 is mounted. ing. The heat sensitive body 14 is supported in the outer case 16 via a coil spring 15a so as to be movable vertically and vertically.

[0008] When assembling the temperature sensor for a cooker,
The protrusion 15b is inserted into the slit hole 16a on the bottom surface of the outer case 16, and the heat sensitive body 14 is stored in the outer case 16 so that the protrusion 15b is hooked on the bottom surface.

When the temperature sensor for a cooking appliance is applied to a cooking appliance, when an inner pan (not shown) is installed in the outer pan, the inner pan is mounted on the lid 13 of the thermosensitive body 14, and the weight of the inner pan is weighted. Then, the heat sensitive body 14 descends against the coil spring 15a. As a result, the reed switch 23 is
When the reed switch 23 is moved to a position close to 26, the reed switch 23 receives a magnetic field from the permanent magnets 25 and 26, and the reed switch is short-circuited, thereby detecting that the inner pot is set.

[0010]

However, the temperature sensor for a conventional cooking device requires caulking the edge of the lid in order to attach the lid after the detection element of the inner pot and the temperature-sensitive element are assembled in the holder. . This caulking operation is complicated.

Further, since the conventional temperature sensor for a cooking device requires a component such as a permanent magnet support plate to be attached to the outer case, the number of components increases and the work efficiency at the time of assembly is poor. There is a disadvantage that.

Further, the conventional temperature sensor for a cooking appliance uses a holder for assembling the detecting element and the temperature-sensitive element of the inner pan, and after attaching the detecting element and the temperature-sensitive element to the holder, the holder is inserted into the inner case. Since it is necessary to attach a lid later, since there is a holder separately from the inner case, there are disadvantages that the number of parts is large and the assembling work is complicated.

[0013] Therefore, a technical problem of the present invention is to obtain a temperature sensor for a cooker which has a high work efficiency at the time of assembly and a small number of parts.

[0014]

According to the present invention, a lid to be pressed by the object to be heated of the cooker, a first cylindrical case having one end attached to the lid, A detection element supported in the case, for detecting whether or not the body to be heated is pressed by the lid, and a detection element for detecting the temperature of the body to be heated in the first case. A temperature sensing element fixed and supported in the vicinity, a second case slidably fitted to the first case from the other end of the first case,
A cooker temperature sensor for controlling the cooker based on a detection signal of the detection element and a temperature signal of the temperature sensing element, the spring including a spring for elastically supporting the first case with respect to the second case; , A spiral groove is formed on an outer peripheral wall of the one end of the first case, and a protrusion is provided on an outer peripheral edge of the lid to be screwed with the spiral groove. The lid is attached to the one end of the first case by the screwing of the spiral groove and the spiral groove, whereby a temperature sensor for a cooking appliance is obtained.

According to one aspect of the present invention, the detecting element is a reed switch, and is used for operating the reed switch when the first case moves when the object to be heated is pressed by the lid. A permanent magnet is fixedly supported on a side wall of the second case.

According to another aspect of the present invention, the lead terminal of the detection element and the lead terminal of the temperature sensing element are fixedly connected to a lead wire by a common crimp terminal, and are provided inside the first case. The crimp terminal is locked to a locking portion.

According to another aspect of the present invention, the first case is made of a cylindrical insulator having openings at both ends, and has a convex portion projecting inward from an inner surface of the one end, and the first case has a convex portion. An accommodation groove for accommodating the temperature sensing element is formed on a side surface of the convex portion, and a locking portion for locking the crimp terminal is formed on an inner surface of the opening at the other end.

According to still another aspect of the present invention, the second case is formed in a cylindrical shape having a predetermined diameter, and the permanent magnet is fixedly supported on an inner surface of the second case. The first case is formed in a small-diameter cylindrical shape having a diameter smaller than a predetermined diameter of the second case,
The outer peripheral wall is partially recessed inward from the small diameter cylinder to allow the permanent magnet to pass between the first and second cases when the first and second cases are fitted together. The part is formed.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A temperature sensor for a cooking appliance according to an embodiment of the present invention will be described with reference to the drawings.

Referring to FIG. 1, FIG. 2, FIG. 3, and FIG. 4, the illustrated cooker temperature sensor has a lid 33 to be pressed against a heated body of the cooker, and the lid 33 attached to one end. A cylindrical first case 34a and a detecting element 23 supported in the first case 34a for detecting whether the body to be heated (not shown) is pressed by the lid 33 or not. And the first case 34 for sensing the temperature of the object to be heated.
a temperature-sensitive element 30 fixedly supported in the vicinity of the lid 33 in FIG.
a, a second case 36 slidably fitted to the first case 34a from the other end of the first case, and the first case 34a elastically with respect to the second case. A coil spring 15a as a supporting spring,
This is a cooker temperature sensor for controlling the cooker based on a detection signal of the detection element 23 and a temperature signal of the temperature sensing element 30a.

In the illustrated embodiment, the second case 36
Is formed in a cylindrical shape having a predetermined diameter to constitute an outer case, and the first case 34a is formed in a small-diameter cylindrical shape having a diameter smaller than the predetermined diameter of the second case 36,
Make up the inner case.

The first case 34a is made of a cylindrical insulator having openings at both ends, and has a projection 34-1 projecting inward from the inner surface of the upper end 34a-1 as the one end. A storage groove 34-2 for storing the temperature-sensitive element (a thermistor is used as an example) 30a is formed on a side surface of the convex portion 34-1. The temperature sensing element 30a is housed in the housing groove 34-2, and the lead terminal of the detection element 23 and the lead terminal of the temperature sensing element 30a are fixedly connected to the lead wire 21 by a common crimp terminal 29. The crimp terminal 29 is locked to the crimp terminal locking portion 22 provided on the inner surface of the opening of the lower end 34a-2 as the other end of the first case, and the temperature sensing element 30a and the detection element 23 are connected to the first case. It is attached to the case 34a.

A spiral groove 34-3 is formed on the outer peripheral wall of the one end of the first case 34a, and the outer peripheral edge of the lid 33 is screwed into the spiral groove 34-3. The screwing projection 33a and the spiral groove 34
The cover 33 is attached to the one end of the first case 34a by screwing with the -3, and the heat sensitive body 34 is formed. Note that a protective sheet 32 that protects the temperature-sensitive element 30a may be provided between the lid 33 and the first case.

The lower end 34a-2 of the first case is provided with a hook projection 35b projecting downward.

The second case 36 has a cylindrical portion 36a and a flange-like bottom portion 36b extending outward from the lower end thereof, and the outer periphery of the cylindrical portion 36a has a coil spring 15 as a spring.
a, the heat-sensitive element 34 is inserted into the second case 36 from the lower end, so that the hook projection 35b is locked to the lower end of the second case 36 so that the coil spring 1
It is elastically supported at 5a.

The detecting element 23 is a reed switch, and the permanent magnet 26 for operating the reed switch 23 when the first case 34a is moved by pressing the object to be heated by the lid 33 is provided. , The second
Is fixedly supported on the side wall of the case 36. That is,
The permanent magnet 26 is fixedly supported by a mounting projection 24 provided on the inner surface of the second case 36. Accordingly, the outer peripheral wall of the first case 34a, which is the inner case,
In order to allow the permanent magnet 26 to pass between the first and second cases when the first and second cases are fitted together, a portion that is partially recessed inside the small-diameter cylinder is formed. ing. That is, in the first case 34a, a part of the cylindrical wall is formed on the flat surface 34a-3.

[0027]

[Effects of the Invention] As described above, according to the present invention,
The lid can be easily attached to the first case by screwing the screwing projection provided on the lid with the spiral groove provided on the outer periphery of one end of the first case. Further, since the permanent magnet for operating the detection element is directly attached to the side wall of the second case, no parts for supporting the permanent magnet are required, and the number of parts is reduced and the ease of assembly is realized. Furthermore, since the detecting element and the temperature sensing element are directly supported by the first case and connected to a common lead wire by a crimp terminal, and the crimp terminal is directly locked to the lower end of the first case, Since there is no need for a holder conventionally required, there is an effect that the number of parts can be reduced and the ease of assembly can be realized.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a temperature sensor for a cooking appliance according to an embodiment of the present invention.

FIG. 2 is a plan view, a front view, and a bottom view of the temperature sensing element of FIG. 1;

FIG. 3 is a sectional view taken along line AA ′ of the temperature sensing element of FIG. 1;

FIG. 4 is a sectional view taken along line BB ′ of the temperature sensing element of FIG. 1;

FIG. 5 is an exploded perspective view of a conventional example of a cooker temperature sensor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Temperature sensor for cookers 11 Temperature sensitive element (thermistor) 13 Lid 14 Heat sensitive body 14a Holder 15 Inner case 15a Coil spring 15b Projection 16 Outer case 17 Permanent magnet support plate 19 Terminal 20 Protective tube 21 Lead wire 22 Locking part 23 Detecting element (Reed switch) 24 Mounting projection 25, 26 Permanent magnet 29 Crimp terminal 30a Temperature sensing element (thermistor) 32 Protective sheet 33 Lid 33a Screw projection 34 Heat sensitive body 34-1 Convex section 34-2 Storage groove 34-3 Spiral Groove 34a First case (inner case) 34a-1 Upper end 34a-2 Lower end 34a-3 Flat surface 35b Hook projection 36 Second case (outer case) 36a Cylindrical portion 36b Bottom portion

Claims (5)

(57) [Scope of request for utility model registration] 1. A lid to be pressed against an object to be heated of a cooker, a first cylindrical case having the lid attached to one end, and a first case supported in the first case. A detection element for detecting whether or not the object to be heated is pressed, and a temperature-sensitive element fixedly supported near the lid in the first case to sense the temperature of the object to be heated; A second case slidably fitted to the first case from the other end of the first case, and a spring for elastically supporting the first case with respect to the second case. In the cooker temperature sensor for controlling the cooker with a detection signal of the detection element and a temperature signal of the temperature sensing element,
A spiral groove is formed on an outer peripheral wall of the one end portion of the first case, and a protrusion is provided on an outer peripheral edge of the lid so as to be screwed into the spiral groove. The temperature sensor for a cooking appliance, wherein the lid is attached to the one end of the first case by screwing with a spiral groove. 2. The temperature sensor for a cooking appliance according to claim 1, wherein the detecting element is a reed switch, and the reed is moved when the first case is moved by pressing the object to be heated by the lid. A temperature sensor for a cooker, wherein a permanent magnet for operating a switch is fixedly supported on a side wall of the second case. 3. The temperature sensor for a cooking appliance according to claim 1, wherein a lead terminal of the detection element and a lead terminal of the temperature sensing element are fixedly connected to a lead wire by a common crimp terminal, and the first case is provided. A temperature sensor for a cooking appliance wherein the crimp terminal is locked to a locking portion provided inside the cooking device. 4. The temperature sensor for a cooking appliance according to claim 1, wherein the first case is formed of a cylindrical insulator having both ends opened, and has a convex portion projecting inward from an inner surface of the one end. A storage groove for storing the temperature sensing element is formed on a side surface of the convex portion on the opening side, and a locking portion for locking the crimp terminal is formed on an inner surface of the opening at the other end. Temperature sensor for a cooking appliance. 5. The cooker temperature sensor according to claim 2, wherein the second case is formed in a cylindrical shape having a predetermined diameter, and the permanent magnet is fixedly supported on an inner surface of the second case. The first case is formed in a small-diameter cylindrical shape having a diameter smaller than a predetermined diameter of the second case, and an outer peripheral wall of the first case is fitted with the first and second cases. A temperature sensor for a cooking appliance, wherein a portion depressed partially inside the small-diameter cylinder is formed to allow the permanent magnet to pass between the first and second cases.