JP2513636Y2 - Radiation thermometer - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radiation thermometer which detects a heat ray from an ear and measures a body temperature.

[0002]

2. Description of the Related Art A conventional radiation thermometer is provided with a case body having a built-in circuit portion, a probe projecting outward from a proper place of the case body, and an inside of an opening tip side of the probe. It is composed of a temperature detection sensor (for example, thermopile) (not shown). When measuring the body temperature, the tip of the tapered opening of the probe is slightly inserted into the ear canal. In this state, the thermopile detects heat rays radiated from the inner ear. And to the circuit part of the case body where the thermopile is electrically connected via the lead wire,
This detection signal is output. The circuit section determines the body temperature based on this detection signal. In other words, this radiation thermometer instantly measures body temperature without contact.

[0003]

In the above-mentioned conventional radiation thermometer, the temperature detecting sensor is arranged from the tip end surface of the opening of the probe.
There are a structure in which a considerable distance is opened, that is, a structure in which the temperature detecting sensor is fixedly arranged by retracting to the case body side, and a structure in which a temperature detection sensor is fixedly arranged near the opening tip side of the probe.

In the former case, since the temperature detecting sensor is fixed at a position retracted considerably from the tip end surface of the probe, there is no possibility that the sensor is contaminated by a factor from the outside, but the heat ray is detected. It has the disadvantage of being inaccurate. On the other hand, the latter one has a high accuracy of detecting the heat ray, but has a drawback that the sensor is likely to be contaminated and is easily affected by external heat.

An object of the present invention is to solve the above problems and to provide a radiation thermometer which has good measurement accuracy and is free from the risk of sensor contamination.

[0006]

In order to achieve this object, the radiation thermometer of the present invention has the following configuration. The radiation thermometer is a case body, a cylindrical probe that is arranged movably in the cylinder axis direction inside and outside the case body, and has a tip opening outside the case body, and temperature detection provided in the cylinder of the probe. A sensor, a support member in the case body for supporting the temperature detection sensor in the cylinder of the probe, and protruding in the thickness direction of the probe to restrict the movement range of the probe in the cylinder axis direction, and the support member. An elastic member that is present between the member and the probe and urges the probe in the cylinder axis direction so as to bring the tip opening portion to the outermost side with respect to the case main body; When the temperature detection sensor is located inside the case body against the member, the temperature detection sensor is located in the vicinity of the tip opening inside the probe. It is set to.

In the radiation thermometer having such a structure,
In the normal state, the tip end opening of the probe is urged to the outside of the case body by the elastic member, and the temperature detection sensor arranged in the probe cylinder is in a position retracted relative to the tip end opening of the probe. . In this state, insert the tip opening of the probe slightly into the ear canal, and push the probe in the ear direction, the probe retracts inside the case body against the bias of the elastic member, and the temperature detection sensor Located near the opening. In this way, the probe is movable with respect to the temperature detection sensor (movable in and out of the case body), so the temperature detection sensor is inside the probe when not in use, so the temperature detection sensor is contaminated from the outside, or There is no risk of being affected by external heat, and the temperature detecting sensor approaches the measuring section during use, so the temperature of the heat ray can be detected more accurately.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view showing a cross section of a main part of a concrete embodiment of a radiation thermometer according to the present invention.

The radiation thermometer includes a case body 1 having a built-in circuit portion, a supporting member 2 arranged at an appropriate position of the case body 1, and a temperature detecting sensor 3 arranged at the tip of the supporting member 2. The probe 4 is spring-biased with respect to the support member 2 and externally fitted to the sensor 3.

As shown in FIG. 1, the support member 2 includes a frame body portion 21 fixedly arranged on the upper portion of the case body 1, and a cylindrical pipe body 23 fixed to the frame body portion 21 with screws 22. The tip of the pipe body 23 is projected outward from the case body 1. The temperature detection sensor 3 is fixedly arranged at the tip of the pipe body 23 protruding outward. The temperature detection sensor 3 is a thermopile that detects heat rays, and is configured by incorporating a sensor element in the sensor box 31.

The probe 4 is a cylindrical body having a tapered tip, a collar plate portion 41 is provided around the base end portion, and the tip end surface is an opening portion 42. The probe 4 having a fixed length is externally fitted to the pipe body 23 including the thermopile 3, and in this external fitting state, the collar plate portion 41 has the frame body portion 21.
It is locked to the stopper portion 24.

In the embodiment, a detachable cover body 6 is fitted on the tip of the probe 4. This cover body 6
Can be automatically removed by advancing and retracting the push button 7 attached to the case body (support member 2) 1 by biasing the spring 71.

A feature of the present invention is that a coil spring 5 is interposed between the probe 4 and the support member (frame body portion 21) 2. That is, one end of the spring 5 is fixed to the probe 4 and the other end is fixed to the frame body portion 21, and the spring is biased so as to project the probe 4 outward in the normal state. In this normal state, as shown in FIG. 2, the opening tip portion 42 of the probe 4 projects outward more than the thermopile 3. That is, the thermopile 3 is located in a portion largely retracted inward from the tip of the probe 4.

In the radiation thermometer having such a structure,
As shown in FIG. 2, in a normal state, it is spring-biased outward, and projects largely outward from the sensor (thermopile) 3 fixed position. Therefore, in the unused state, the thermopile 3 is positioned so as to retreat largely inward from the tip of the probe 4. As a result, the sensor 3 can be prevented from being contaminated from the outside as well as being thermally affected. Further, as shown in FIG. 2, a micro switch 8 is arranged on the supporting member 2, and in this non-use state, the lever portion 81 of the switch and the probe (collar plate portion 41) 4 in the forward state are provided. It is in a remote position and the start switch is O
Not N. On the other hand, in measuring the body temperature, in this state (state of FIG. 2), the tapered opening tip portion 42 of the probe 4 is slightly inserted into the ear canal, and then the probe 4 is pressed in the ear direction. As a result, the probe 4 retracts toward the case body 1 side against the spring 5. As a result, as shown in FIG. 3, the sensor 3 is positioned near the tip end side of the opening of the probe 4.
In this state, the collar plate portion 41 of the probe 4 in the retracted state collides with the lever portion 81 of the microswitch 8 to make it stand up, and the start switch is turned on (measurement start state). Therefore, when the sensor 3 approaches the measurement site (the ear canal), the heat ray radiated from the ear canal can be accurately detected.

Since the probe 4 is movable (movable and retractable) with respect to the sensor 3, the sensor 3 is not likely to be contaminated from the outside when it is not used, and the heat ray can be accurately detected when it is used.

[0016]

As described above, according to the present invention, the temperature detecting sensor is arranged in the probe so that the probe can be moved in the cylinder axis direction with respect to the case body, and the probe is provided outside the case body by the elastic member. Since it is decided to urge it toward one side, the temperature detection sensor is located farther inward than the tip opening of the probe when not in use, and the temperature detection sensor is located near the tip opening of the probe when in use. be able to. Therefore, the temperature detection sensor is not likely to be contaminated from the outside when it is not used, and it is possible to detect the heat ray with high accuracy when it is used.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a section of a main part of a radiation thermometer according to an embodiment.

FIG. 2 is a sectional view of an essential part showing a non-use state of the radiation thermometer of the embodiment.

FIG. 3 is a cross-sectional view of essential parts showing a usage state of the radiation thermometer according to the embodiment.

[Explanation of symbols]

 1 case body 2 support member 3 temperature detection sensor 4 probe

Front page continuation (72) Hiroyuki Ota, 17 Hiroyuki Ota, Shimogyo-ku, Kyoto City Center Building, Omron Life Science Research Institute Co., Ltd. Omron Life Science Institute (56) References International Publication 90/2521 (WO, A)

Claims (1)

(57) [Scope of utility model registration request] 1. A case body, and a case inside and outside the case body.
It is arranged movably in the cylinder axis direction outside the case body
A cylindrical probe having a tip opening of
Inside the case body and the temperature detection sensor installed in the cylinder
The temperature detection sensor inside the tube of the probe.
And supports it in the thickness direction of the probe.
Support for regulating the range of movement of the probe in the cylinder axis direction
Between the support member and the probe,
The probe is urged in the cylinder axis direction to move the tip opening forward.
Elasticity that acts so as to extend to the outermost side of the case body
A member, and the probe is placed in front of the elastic member.
Temperature detection when inside the case body
The sensor is located inside the probe near the tip opening.
A radiation thermometer characterized by being placed.