JP3017422U - Heat sensitive device - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a heat-sensitive device capable of stabilizing temperature coupling between a heat-sensitive body and a heat-sensing device by evenly pushing up a metal cap to enable accurate temperature detection. And [Structure] A movable cap is provided with a metal cap and an exterior body having a movable cylinder by providing a structure in which a notch is provided in a part of the movable cylinder, and the spring is brought into contact with a portion where the notch is bent inward. The outer body uniformly pushes the outer body upward by a spring provided between the body and the portion, so that the body to be heated and the metal cap can be brought into close contact with each other.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat-sensitive device used in a heating detector used in gas cooking equipment and the like.

[0002]

[Prior art]

 In a combustor such as a gas stove or a rice cooker, a conventional thermosensitive device for detecting the temperature of a heated portion such as a pan has a thermosensitive element fixed to a holder having a temperature measuring surface. In the temperature sensing operation of the heat-sensitive device having such a structure, the holder thermally expands due to the heat transmitted from the object to be heated, and the thermal coupling between the holder and the heat-sensitive element is changed, resulting in a heat-detection error. Will occur.

Furthermore, after the object to be heated has cooled, the holder undergoes thermal contraction, so the mechanical coupling between the holder and the heat-sensitive element changes. Since such thermal expansion and contraction occur each time the heating operation is stopped, the heat detection error tends to increase with each repeated use.

As a means for solving such a problem, Japanese Patent Application No. 6-310783 has been proposed.

That is, as can be seen from the overall view shown in FIG. 3 and the enlarged sectional view (b) near the metal cap portion shown in FIG. 4, the mounting member 3 having the spring portion 31 is A heat detection device 2 for detecting heat is fixed to the inside of the metal cap 1 while being held by the attachment member holding portion 4. Therefore, since the surface of the heat detecting device 2 is pressed against the inside of the metal cap 1 by the spring pressure of the spring portion 31, the heat of the heat-sensitive body 9 causes the metal cap 1 to thermally expand, or the heat-sensitive body to be heated. Even when 9 cools and the metal cap 1 contracts due to heat, the expansion and contraction of the metal cap 1 due to the thermal expansion and contraction are absorbed by the elasticity of the spring portion 31 of the mounting member 3, and the heat detecting device 2 operates as a metal. The metal cap 1 is stably thermally coupled to the metal cap 1 without being affected by the thermal expansion and contraction of the metal cap 1.

[0006]

[Problems to be solved by the device]

 However, as shown in the bottom view of the metal cap portion of FIG. 4, the spring 6 provided so as to closely contact the object to be heated 9 and the outside of the metal cap 1 to improve the thermal coupling, is attached to the spring portion 31. Since the metal cap 1 abuts on the member 3, the spring pressure of the spring 6 may not work to uniformly push the metal cap upward, and the metal cap 1 cannot be pressed against the heated body 9 stably. In some cases, the thermal coupling between the heat sensitive body 9 and the heat detecting device 2 is not stable and accurate temperature detection cannot be performed.

According to the present invention, the spring pressure of the spring 6 uniformly pushes the metal cap upward to stabilize the thermal coupling between the heat-sensitive body 9 and the heat detecting device 2 and enable accurate temperature detection. An object of the present invention is to provide a heat sensitive device.

[0008]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a heat-sensitive device including a metal cap and an exterior body including a movable tube, a heat detecting device, a mounting member, and a fixing portion, wherein the heat detecting device is the metal cap. A heat-sensitive device which is attached to the inner surface by the attachment member and has a structure in which the exterior body can be freely moved by a spring provided between the exterior body and the fixed portion. Provided is a thermosensitive device in which a notch is provided, the notch is bent inward, and the bent portion is brought into contact with the spring.

Further, in order to achieve the above object, the present invention provides a heat-sensitive device in which the bent portions are provided at least at three positions on the circumference of the movable cylinder.

[0010]

[Action]

 Between the fixed part and the metal cap fixed to the movable cylinder by welding, etc., by fitting the protrusion provided on the metal cap with the hollowed part provided on the movable cylinder, and the fixed part. A spring provided at the upper part evenly pushes the exterior body upward, so that the heated body and the metal cap can be in close contact with each other. The structure is such that the spring is brought into contact with the bent portion. If the notch bent inward is brought into contact with the spring, there will be no unevenness in the contact portion as in the case where the spring is brought into contact with the mounting member having the spring portion that suppresses the heat detection device. Therefore, the spring can stably push up the movable barrel, that is, the outer casing including the metal cap and the movable barrel.

[0011]

【Example】

 Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1A is a sectional view of the entire heat-sensitive device according to the present invention. As shown in this figure, the heat-sensitive device pushes the movable cylinder 5 upward by the spring 6 provided between the fixed portion 8 and the movable cylinder 5, and the metal cap 1 in which the heat detection device 2 is installed is panned. It has a structure to be pressed against the object 9 to be heated.

FIG. 1B shows an enlarged sectional view of the upper portion of the movable barrel 5. The heat detecting device 2 is attached to the inner surface of the metal cap 1 by a mounting member 3 having a spring portion, and the heat detecting device 2 is pressed inside the metal cap 1 by the spring pressure of the spring portion 31. Even if the metal cap 1 expands and contracts due to thermal expansion and contraction, it is absorbed by the elasticity of the spring portion 31 of the mounting member 3, and the heat detection device 2 is affected by the thermal expansion and contraction of the metal cap 1. Stable and heat-bonded to the metal cap 1.

Further, a portion 7 in which the cutout portion is bent inward is provided in the upper part of the movable cylinder, and the portion 7 in which the cutout portion is bent inward abuts the spring at the lower portion of the mounting member 3 having the spring portion. I am doing it.

FIG. 2 shows a perspective view of the upper portion of the movable cylinder 5 with the metal cap 1 removed. The metal cap 1 is fixed by fitting the metal cap fixing cutout 11 provided on the upper part of the movable cylinder 5 with the metal cap fixing protrusion 10 provided on the metal cap 1. By providing three or more fitting portions, the metal cap 1 can be stably fixed to the upper part of the movable barrel 5. Of course, the metal cap 1 may be attached to the movable barrel 5 by welding or the like so that it can be attached stably.

Further, as shown in the figure, the portion 7 in which the cutout portion is bent inward is provided at three positions on the circumference of the movable cylinder, and the spring 6 abuts on this portion. Since the battery 6 can evenly push up the entire exterior body including the movable cylinder to the upper part, the thermal coupling between the heat-sensitive body 9 and the heat detection device 2 can be stabilized and accurate temperature detection can be performed. it can.

Of course, if the spring 6 can uniformly push up the entire outer casing including the movable cylinder to the upper part, the number of the inwardly bent portions 7 may be three or more. A portion for holding the spring 6 may be provided in the.

[0018]

[Effect of device]

 It is possible to provide a heat-sensitive device in which a heated object such as a pot and the heat detection device have stable thermal coupling.

[Brief description of drawings]

FIG. 1 is a sectional view of a heat-sensitive device according to the present invention.

FIG. 2 is a perspective view of an upper portion of a movable cylinder of the heat-sensitive device according to the present invention.

FIG. 3 is a sectional view of a conventional heat sensitive device.

FIG. 4 is a structural diagram of a metal cap portion.

[Explanation of symbols]

 1. Metal cap 2. Heat detection device 3. Mounting member having a spring portion 4. Mounting member holding part 5. Movable tube 6. Spring 7. 7. The part where the notch is bent inward. Fixed part 9. Heat-sensitive body 10. Protrusion for fixing metal cap 11. Hollow-out part for fixing metal cap

Claims (2)

[Scope of utility model registration request] 1. An exterior body comprising a metal cap and a movable cylinder,
In a heat-sensitive device including a heat detecting device, a mounting member, and a fixing portion, the heat detecting device is attached to an inner surface of the metal cap by the attaching member, and the exterior body is provided between the fixing portion. A heat-sensitive device having a structure capable of moving freely by a spring, wherein a notch is provided in a part of a movable cylinder, the notch is bent inward, and the bent portion is brought into contact with the spring. Heat sensitive device. 2. The heat sensitive device according to claim 1, wherein the bent portion is provided at least at three positions on the circumference of the movable cylinder.