CN2406236Y

CN2406236Y - Luminous thermometer

Info

Publication number: CN2406236Y
Application number: CN 99253321
Authority: CN
Inventors: 薛海英; 薛海燕
Original assignee: 薛碧
Priority date: 1999-11-16
Filing date: 1999-11-16
Publication date: 2000-11-15
Anticipated expiration: 2009-11-16

Abstract

The utility model relates to a luminous thermometer. The tail end of an existing glass thermometer, which is engraved with 42 DEG C, is connected with a light-reflecting cover, and a light source is arranged in a cavity that is enclosed by the tail end of the thermometer and the light-reflecting cover. With the thermometer, the detected temperature can be seen clearly without any external illumination, even under the condition of entire darkness. The luminous thermometer, therefore, has the advantage of more practical and convenient use.

Description

Night bright clinical thermometer

A kind of night bright clinical thermometer.

Self is not with light source present clinical thermometer, the temperature that needs exterior light to watch to record, and also see clearly daytime.One to evening, sees that under light the thermometric degree is just very difficult.If, light dark slightly a bit or the old man have poor eyesight a bit, you just do not want to have seen! And illly be regardless of evening on daytime.Present clinical thermometer uses, and is tangible inconvenient!

The purpose of this utility model is, utilizes existing glass clinical thermometer, by the light source that is connected with clinical thermometer is set, no matter utilize the characteristic and the geometric optical theory of glass, invent a kind ofly, be daytime or night, no longer use extraneous light, just the novel clinical thermometer of the absolutely clear observation body temperature of energy.This not only has made things convenient for huge numbers of families, and rescues for field work personnel's such as army medical care convenience also is provided!

The utility model is achieved through the following technical solutions: 1, existing glass tube body temperature meter end (holding 42 ℃ of these ends), link to each other with reflection shield, be mounted with light source in the enclosed cavity of clinical thermometer end and reflection shield.2 or without reflection shield, and directly be provided with reflector layer at the rear portion of light source, also can reach the effect of reflection shield, make that light is as much as possible to enter clinical thermometer by the body temperature end.3,, also can establish reflector layer in (mercury bulb 6 these ends) outside on the clinical thermometer top in order to save luminous energy.

Utilize embodiment shown in the drawings below, the utility model is described in further detail.

Fig. 1 is the structural representation of bright clinical thermometer at night.

Fig. 2 does not have scale, does not have the light schematic diagram of white lining for glass tube.

Fig. 3 is existing glass clinical thermometer, use the present invention after, how to become the light schematic diagram of bright clinical thermometer at night.

With reference to Fig. 1, clinical thermometer (1) is terminal to be connected with reflection shield (3), and reflection shield is the bowl-type cover, is reflectorized material in the cover.In the enclosed cavity of clinical thermometer (1) and reflection shield (3), settle light source (2) light source rear portion to be connected battery and switch composition.

With reference to Fig. 2, when light by C ₁During directive C, when having only incident angle r less than 42 °, light C ₁, C could enter the optically thinner medium air by optically denser medium glass at the C point, the folding body is to H.According to path reversal principal, when light HC after the C point enters optically denser medium glass, the refraction to C ₁, at C ₁Point is formed into firing angle r ₁, work as B ₄B ₅During perpendicular to AB, r ₁Inevitable greater than 48 ° of (because r ₁With r be complementary angle each other).Like this, light CC ₁At C ₁Point just can not leave optically denser medium glass, enters in the optically thinner medium air, and inevitable total reflection is to C ₂Direction is penetrated.Because A ₁B ₁Be parallel to AB, so, light C ₁C ₂At A ₁B ₁On incident angle, also equal r ₁, light is also wanted total reflection.Suppose AB and A ₁B ₁Endless, C ₁C ₂This light just can't leave optically denser medium glass, forever forever at AB and A ₁B ₁Between total reflection go down.See another light again, light D ₁D leaves the refraction of optically denser medium glass to H at the D point, forms people's firing angle r at the D point ₂(H ₁DD ₁), inevitable less than 42 °.Because B ₃B ₄Be hypotenuse, we draw the parallel lines A of an AB by the D point ₂B ₂, just can find out D ₁D and A ₂The angle r that D forms ₃, be far smaller than r ₂, and r ₂Less than 42 °, r so ₃Must be far smaller than 42 °.Because A ₂B ₂Be parallel to AB, r ₄And r ₃Be complementary angle each other, so r ₄Must be far longer than 48 °, therefore, light DD ₁At D ₁Point also can not be refracted into from optically denser medium glass in the optically thinner medium air, also with light CC ₁The same, at AB and A ₁B ₁In carry out total reflection.Like this, theoretically, we are at AB, A ₁B ₁Be to can't see light source H on these two limits from BB ₁This end-fire is gone into any light of glass medium.So, how does existing glass tube body temperature meter make it become bright which at night?

With reference to Fig. 3, existing glass tube body temperature meter A ₁B ₁A white lining is arranged on the limit, and actual is that very little thickly dotted white particle is formed, when light from H directive C point, and after C point enters optically denser medium glass, reflect to C ₁, because white particle has changed reflection angle, when light reflected to the E point, incident angle was less than 42 °, light has just left optically denser medium glass at the E point and has been refracted in the optically thinner medium air, to E ₁Direction is penetrated, and we have just seen this light.If, at C ₁Point reflection is to C ₂Point is at C ₂The incident angle of point is still greater than 42 °, again can total reflection to C ₃Point, C ₃Point is a white particle, again light is reflexed to C ₄Point is worked as C ₄When putting incident less than 42 °, light just can be at C ₄Point leaves the glass medium, folds into to dredge in the medium air, to C ₅Direction is penetrated, light HD, and other light is also all like this.Slowly the reflection of this white lining just makes us can see that it is the leukorrhea of " luminous ", and the mercury line is absolutely clear under the holder of white light belt material, and the word at quarter and scale are also absolutely clear.Though, also have sub-fraction light, can be refracted to the F point and the F of mercury bulb ₁Point reflects again, but to night bright clinical thermometer clear, practicality do not had big influence.If, in order to save luminous energy, under the prerequisite that does not strengthen cost, also can be at AA ₁To F ₁This tip, coating is reflector layer once, night bright clinical thermometer seem can be more clear!

Claims

1, a kind of night bright clinical thermometer, with existing glass clinical thermometer (1), it is characterized in that: the end of glass clinical thermometer (1) links to each other with reflection shield (3), is mounted with light source (2) in the enclosed cavity of clinical thermometer (1) end and reflection shield (3), rear portion in light source (2) is formed with battery and switch.

2, night according to claim 1 bright clinical thermometer, it is characterized in that: or do not establish reflection shield (3), and at the rear portion of light source (2), near battery (5) here, direct coating reflector layer.

3, night according to claim 1 bright clinical thermometer, it is characterized in that: the skin on the top of bright clinical thermometer at night (this end of mercury bulb) is provided with reflector layer.