JP2008241364A - Ear thermometer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an ear thermometer in which precise body temperature measurement is not impaired due to the effect of thermal impact when each detection element is fixed so as to be adjacent to an opening of a probe and which can achieve cost reduction. <P>SOLUTION: In the ear thermometer in which the temperature detection element 21 detecting an environmental temperature and an infrared detection element 22 detecting an infrared ray emitted from a temperature measurement region in an ear cavity are built in the probe 3 and which measures the body temperature, the probe 3 is formed as a double tube comprising a main probe body 103 having a main opening part 31 having its tip opened, and a sub probe body 203 including a sub opening part 231 having its tip opened and protruding so as to surround the main opening part and forming an air layer K. A detection element housing body 20 is fixed to the main probe body. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an ear thermometer.

  A thermopile consisting of a thermistor that is a temperature detection element that detects the environmental temperature, and a cold junction and a hot junction that is an infrared detection element that detects infrared rays emitted from the temperature measurement site in the ear cavity, is built in the probe, An ear thermometer configured to measure body temperature based on the detection result of each detection element has been put into practical use.

  The applicant of the present application provides a thermistor that is a temperature detection element and a thermopile composed of a cold junction and a hot junction at positions separated from the probe opening, and guides infrared rays introduced from the probe opening to the thermopile. An ear-type thermometer configured to guide using a tube has been put into practical use.

  With this configuration, the outer diameter of the end surface formed so as to have an opening at the tip of the probe can be reduced, so that it can be inserted into the ear cavity. In addition, when the probe is inserted into the ear cavity, the body temperature is conducted to the probe and accurate body temperature measurement cannot be performed. However, as described above, a light guide tube that guides infrared rays introduced from the opening of the probe to the thermopile is provided. By incorporating the probe in a separated state in the probe, accurate body temperature measurement can be performed even when the body temperature is conducted to the probe. (Patent Document 1) However, if each detection element is arranged at the base of the probe as described above and a light guide tube whose inner surface is gold-plated is provided in the probe, an increase in cost due to an increase in the number of parts and man-hours can be avoided. There will be no. Therefore, in order to reduce the cost by reducing the number of parts including the light guide tube, each detection element may be arranged directly in the opening of the probe. In recent years, each detecting element has been downsized, and an ear thermometer having a structure in which each detecting element is fixed adjacent to the opening of the probe has been put into practical use.

  However, in such a configuration in which each detection element is fixed adjacent to the opening of the probe, accurate body temperature measurement cannot be performed due to the influence of the thermal shock.

In addition, an adhesive is usually used to fix each detection element in the vicinity of the opening of the probe. However, if the amount of adhesive used is not strictly managed, Conducts heat. In other words, accurate manufacturing temperature measurement cannot be performed as a result of difficulty in manufacturing management against accurate thermal shock due to variations in the amount of adhesive used.
JP-A-11-123179

  Therefore, the present invention has been made in view of the above-described matters, and when each detection element is fixed adjacent to the opening of the probe, accurate temperature measurement cannot be performed due to the influence of thermal shock, and The aim is to provide an ear-type thermometer that can reduce costs.

  In order to solve the above-described problem, according to the ear thermometer of the present invention, a probe is provided with a temperature detection element for detecting an environmental temperature and an infrared detection element for detecting infrared rays emitted from a temperature measurement site in the ear cavity. An ear thermometer for measuring body temperature based on the detection results of the two detection elements, wherein the probe has a main probe body having a main opening with its tip opened; and the main opening A sub-probe body that has a sub-opening that is open and projecting so as to surround the portion, and that forms an air layer between the outer peripheral surface of the main probe body and the inner peripheral surface thereof. A tube formed as a tube and having a mounting base for fixing the two detection elements, and a hole facing the infrared detection element on the main opening side, and being fixed to the mounting base and enclosing the two detection elements Container And a detection element containing body that is attached to the hole and transmits infrared rays, and the detection element containing body is fixed to the main probe body so as to close the main opening. It is said.

  The main probe body and the sub probe body are formed in a range of about 6 to 15 mm from the sub opening between the outer peripheral surface of the main probe body and the inner peripheral surface of the sub probe body. It is characterized by being integrally formed through the first connection portion.

  The main probe body includes an end surface portion formed in the main opening, an inner side surface of a hollow cylindrical body, and an engaging portion protruding inward from the inner side surface, and the main opening is The window member or the container member of the detection element storage body is brought into contact with the detection element side surface of the end surface portion so as to be closed, and the attachment base member is engaged with and fixed to the engagement portion. It is characterized by that.

  In addition, an inner wall portion extending in a radial direction from the main opening portion to the inner side surface portion is formed, and the engaging portion is located at a position corresponding to a height of the outer peripheral surface of the container member or an outer peripheral surface of the container member. A contact surface formed apart from the inner wall at a position obtained by adding the height of the window member to the height, and an inclined surface inclined from the inner surface toward the probe center. By pressing the detection element storage body toward the main opening, the surface of the window member or the container member is brought into contact with the inner wall, and the back surface of the mounting base member is engaged with the contact surface. It is characterized by being combined.

  Further, at least two engagement portions are formed inwardly, and the engagement portions are engaged with the back surface of the mounting base member.

  In addition, the liquid crystal display device for displaying the measurement result of the body temperature, and a main body base for covering the liquid crystal display device, the probe and the probe so that the probe is on the same side as the display surface of the liquid crystal display device The body base is integrally formed with the second connecting portion, and the mounting base portion of the detection element housing is fixed on the main opening portion so that the window member is located deeper than the sub opening portion. It is characterized by.

  The mounting base of the detection element housing fixes a lead terminal connected from the two detection elements, and the lead terminal has a total length and strength connectable to a mounting board fixed to the main body base. It is characterized by.

  Further features of the present invention will become apparent from the best mode for carrying out the present invention and the accompanying drawings.

  According to the present invention, there is provided a main probe body having a main opening portion whose tip is opened, and a sub-opening portion whose tip is opened and protruded so as to surround the main opening portion. The probe is formed as a double tube including an outer peripheral surface and a sub-probe body that forms an air layer between the outer peripheral surface and the storage body that stores each detection element is fixed to the main opening of the main probe body. Thus, there is an effect that the cost can be reduced because it is not affected by thermal shock and the number of parts and man-hours can be reduced.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIG. 1A is an external perspective view of an ear thermometer 1 according to an embodiment of the present invention viewed from the probe side, and FIG. 1B is an external perspective view of the ear thermometer 1 viewed from the operation switch 5 side.

  In this figure, the ear-type thermometer 1 has a design shape and a weight that can be easily operated by being held with one hand. For this reason, the ear-type thermometer 1 is configured so that a main body base 2 that is injection-molded from a predetermined resin material and a main body cover 4 are divided into two, and a mounting board, which will be described later, can be fixed inside. Further, the main body base 2 and the main body cover 4 are molded from a resin material colored in a different color. In particular, the main body cover 4 is made of a translucent resin and has two light emitting LED elements 13 provided therein. The flashing state of can be seen from the outside. Incidentally, examples of resin materials that can be used include so-called engineering plastics including polyolefins such as polyethylene, polypropylene, and ethylene vinyl acetate polymers, and polyesters such as polyethylene terephthalate and polybutylene terephthalate.

  The probe 3 inserted into the ear cavity (the ear canal) in order to detect infrared rays radiated from a temperature measurement site in the ear cavity (especially, preferably the tympanic membrane and / or its surroundings) has an outer diameter of about a tip. It is formed in a 7 mm conical cylinder shape and is integrally formed with the main body base 2. Here, the probe 3 can be prepared as a separate part from the main body base 2, and in this case, the assembly process described later is further simplified.

  Referring to FIG. 1A, the probe 3 is provided with a probe cover 10 having the same shape as that of a part of the probe 3 illustrated by a one-dot chain line. The probe cover 10 is provided to prevent earwax or foreign matter from entering the opening of the probe 3 and to maintain a sanitary condition by periodically washing with water after removal. The probe cover 10 is usually prepared by vacuum forming a transparent vinyl material so that the wall thickness is a predetermined thickness, for example, about 0.1 to 0.005 mm, but other resin materials may be used. It can also be molded.

  A flange portion 10f is integrally formed on the probe cover 10 as shown in the figure, and the probe cover 10 can be detached from the probe 3 by clamping the flange portion by operating the probe cover mounting tool 11 as will be described later. ing. Further, since the probe cover mounting tool 11 has a taper shape with a diameter larger than that of the base of the probe 3 as shown in the figure, the probe cover mounting tool 11 prevents insertion before the probe 3 is excessively inserted into the ear cavity. Be considered to be able to.

  Subsequently, in FIG. 1A, a button of the power switch 5 that is pressed is provided below the probe 3. Below the power switch 5 is provided a liquid crystal display device 7 for displaying the measured body temperature in seven segments and displaying the measurement start state with characters such as pictographs. Below the liquid crystal display device 7 is provided a button battery cover 9 that is detachable from the main body base 2 when the button battery 8 shown by the broken line is replaced.

  On the other hand, in FIG. 1B, the main body cover 4 is provided with a measurement switch 6 at a position on the substantially back side of the probe 3. A piezoelectric speaker 12 shown by a broken line is fixed to the back side of the main body cover 4.

  Next, FIG. 2 is a three-dimensional exploded view of the ear thermometer 1 of FIG. In this figure, the components or components already described are denoted by the same reference numerals as those in FIG. 1 and are not described. The body cover 4 is formed with a recess having a hole 4a for fixing the measurement switch 6. The pair of claw portions 6a formed on the measurement switch 6 is inserted into the hole portion 4a so that the claw portions 6a are respectively locked to the back surface edge portions of the hole portions 4a so that they are prevented from coming off and fixed. The After the fixing, the measuring switch 6 can be moved in the front-rear direction with respect to the main body cover 4, so that the mechanical contact type switch 6a including the tact switch mounted on the main mounting surface 15a of the mounting board 15 is pressed and operated. It will be possible. Further, the piezoelectric speaker 12 shown in broken lines is fixed in advance on the back surface of the main body cover 4 as described above, and wiring 30 to the speaker 12 is provided from the main mounting surface 15 a of the mounting substrate 15.

  Near the edge of the inner peripheral surface of the main body cover 4, four convex portions 4f shown by broken lines in the drawing are formed at symmetrical positions, respectively. Moreover, the to-be-latched part 4k is formed in the upper part. On the other hand, the main body base 2 is formed with an edge portion having the same shape as the edge portion of the main body cover 4, and each convex portion is located at a position corresponding to the four convex portions 4f from the edge portion of the main body base 2. Four recesses 2f each formed with a groove portion that fits into 4f are integrally formed. A locking portion 2k that is locked to the locked portion 4k is integrally formed on the upper portion of the main body base 2.

  With the above configuration, as shown in the figure, the locked portion 4k of the main body cover 4 is first locked to the locking portion 2k and positioned, and then each convex portion 4f is fitted to the concave portion 4f so as to be screwed. Alternatively, it can be assembled and assembled without using any adhesives.

  Since the mounting substrate 15 is fixed in advance to the inside surrounded by the edge portion of the main body base 2, the mounting substrate 15 has a shape portion 15 f having a similar shape substantially along the edge wall portion of the main body base 2 as illustrated. The LED element 13, the CPU element, and various electronic components are mounted on the main mounting surface 15a of the mounting substrate 15. A mechanical switch 5a shown by a broken line and a battery box for setting the liquid crystal display device 7 and the button battery 8 are mounted on the sub-mounting surface 15b on the back surface side of the mounting substrate 15. Further, the wiring 30 connected from the detection element housing 20 described later is also connected on the sub-mounting surface 15b.

  In order to fix the mounting substrate 15 to the main body base 2, a screw hole portion 15c and a fixing hole portion 15h are formed at positions shown in the drawing, respectively. On the other hand, the mounting studs 2b and 2h are integrally formed in the main body base 2 at positions matching the screw hole 15c and the fixing hole 15h, and the screw hole 15c and the fixing hole 15h of the mounting substrate 15 are formed into the main body. The screw 39 is configured to be able to be screwed and fixed to the stud portion 2b after being set to match the mounting stud portions 2b and 2h of the base 2. In order to integrally mold the main body base 2 and the probe 3, an opening 2 a communicating with the inner peripheral surface of the probe 3 is formed.

  The body cover 2 is formed with a recess having a hole 2c for fixing the power switch 5, and a pair of claw portions 5a formed in the power switch 5 is inserted into the hole 2c so that the claw portion is formed. The 5a is locked to the back edge portion of the hole 2c to prevent the hole 5c from coming off. After the fixing, the power switch 5 can be moved in the front-rear direction with respect to the main body base 2, so that the mechanical switch 5a, which is a tact switch mounted on the sub-mounting surface 15b of the mounting substrate 15, can be operated. It becomes.

  The main body cover 2 has an opening 2d for forming an opening at a position matching the display surface of the liquid crystal display device 7 described above. Further, in order to make the button battery 8 replaceable, an opening 2g larger than the outer dimensions of the button battery 8 is formed, and a button battery cover 9 for covering the opening 2g is slidably assembled.

  As described above, it can be completed by fitting the main body cover 4 after fixing the mounting substrate 15 after mounting each component to the main body cover 2.

  On the other hand, the probe cover 10 is moved with respect to the probe 3 in the direction of the arrow and is set so as to cover the probe 3. After this setting, the probe mounting tool 11 is prevented from coming off by rotating in the direction of the arrow.

  FIG. 3 is an operation explanatory view illustrating the relationship between the probe cover mounting tool 11 for detachably mounting the probe cover 10 and the probe 3 formed integrally with the main body base 2. In this figure, the probe cover mounting tool 11 has a cylindrical shape in which an opening hole is formed in which a stepped portion 11b is formed which is prevented from coming off by abutting against a flange portion 10f of a probe cover 10 (shown by a dashed line in the drawing). The member is prepared by injection molding from a resin material having a different color from the main body base 2 described above. On the outer peripheral surface of the probe mounting tool 11, gripping portions 11 c and 11 c that are gripped by the fingertips are formed at symmetrical positions so that the probe mounting tool 11 can rotate in the direction of the arrow in the figure.

  Further, locking projections 11d and 11d (one of which is shown by a broken line) are formed to project outward from the grips 11c and 11c at a position of an angle of 90 degrees. Further, a locking groove 11k is formed at the center of each locking projection 11d.

  On the other hand, a concentric stepped portion 2x that abuts against the lower surface of the flange portion 10f of the probe cover 10 (shown by a one-dot chain line in the figure) is integrally formed on the main body base 2 at a position corresponding to the base portion of the probe 3. Yes. Further, the inner flange portions 2y and 2y are concentrically integrated with the probe 3 through the space portion 2w so as to surround the step portion 2x. Protrusions 2t and 2t shown in broken lines are formed at the centers of the inner flanges 2y and 2y to be engaged with the locking groove 11k at the center of the locking protrusion 11d.

  In the above configuration, after the probe cover 10 is put on the probe 3, the gripping portions 11c and 11c of the probe mounting tool 11 are gripped and moved downward, and the locking projections 11d and 11d (one is shown by a broken line). After entering the large-diameter space portion 2wk between the inner flange portions 2y and 2y, the respective locking groove portions 11k at the center of each locking projection portion 11d are turned into the respective projections 2t by rotating counterclockwise. Locking the probe 3 prevents the probe 3 from coming off.

  By the above operation, the probe cover 10 of FIG. 4 is attached and the state shown in the sectional view taken along the line XX in FIG. That is, as shown in FIG. 4, the lower surface of the flange portion 10 f of the probe cover 10 (shown by a one-dot chain line in the drawing) abuts on the step portion 2 x, and the upper surface of the flange portion 10 f contacts the step portion 11 b of the probe cover mounting tool 11. By coming into contact with each other, it can be clamped from above and below. Further, for example, when removing the probe cover 10 for washing with water, an operation reverse to the above may be performed.

  As shown in the cross-sectional view of FIG. 4, the probe 3 has an end surface portion formed so as to have a main opening 31 at the tip thereof and an inner side surface portion of the hollow cylindrical body and an opening portion of the main body base 2. It is formed so as to communicate with 2a. A detection element housing 20 is fixed to the tip of the probe 3 formed in this way as shown in the figure, and this detection element housing 20 is connected to the mounting substrate 15 via a wiring 30. Or it connects via the connector which is not shown in figure, and it is made to perform the below-mentioned body temperature measurement.

  Here, the distal end portion of the probe 3 has an outer diameter of about 7 mm because it is inserted into the outer ear. For this reason, in order to fix the detection element storage body 20 at the illustrated position, the outer diameter of the storage body 20 is set to, for example, a diameter of 5 mm, while the height dimension is set to about 4 mm. Become.

  FIG. 5 is an external perspective view in which a part of the detection element housing 20 is broken. In this figure, the detection element housing 20 includes a thermistor 21 which is a temperature detection element for detecting the environmental temperature, and an infrared detection element 22 for detecting infrared rays radiated from a temperature measurement site in the ear cavity. It is fixed on the top. The thermistor 21 thus fixed is adjusted at the manufacturing stage so that the absolute temperature, which is the use environment temperature, can be measured. For this reason, the attachment base member 23 is made of a good heat conductor such as an aluminum material, and is fixed so that the outside air temperature can be transmitted and the surface area of the attachment surface of the thermistor 21 is increased. After this fixing, the lead wire of the thermistor 21 is connected to the electrode lead 28 fixed in an insulated state with respect to the mounting base member 23.

  On the other hand, the infrared detecting element 22 for detecting the infrared IR cannot detect the absolute temperature but can detect only the relative temperature change. For this reason, body temperature is detected by adding the detection temperature by an infrared detection element to the detection temperature by a temperature detection element. Details of this detection operation are described in, for example, Japanese Patent Application Laid-Open No. 11-123179, and are omitted here.

  In FIG. 5, since this infrared detecting element 22 is preferably a thermocouple type (thermopile type), a hot contact 22a formed in a petal shape on a wafer carrier 22c fixed on a pedestal 23b of the mounting base member 23. And the cold junction 22b. Each hot junction and cold junction are formed of different metals and connected in series, and lead wires are connected to electrode leads 29 fixed in an insulated state to the mounting base member 23 as shown in the figure. ing. In addition, the range H surrounded by the hot junction 22a is painted black and facilitates absorption of infrared rays so that an electromotive force can be generated between the respective contacts and detection of the relative temperature change is performed. Yes.

  A cylindrical container member 25 having an outer peripheral surface 25a on the side wall and a hole 24 on the ceiling surface and formed so as to surround the two detection elements is shown in a half sectional view. Similarly to the mounting base member 23, the container member 25 is made of a metal having a good heat conductor such as an aluminum material or a stainless steel material so that the outside air temperature can be transmitted to the thermistor 21. Further, a window member 26 made of a ceramic material that transmits infrared rays is fixed to the hole portion 24 as shown in the figure, and constitutes a detection element housing 20 as shown in the figure.

  Here, according to the illustrated detection element housing 20, the mounting base member 23 forms an outer flange 23a extending in the radial direction from the edge thereof, and this back surface is used as a fixed portion. The detection element housing 20 may be configured as the mounting base member 23 having the same diameter as the outer peripheral surface 25a of the container member 25 without the need for the outer flange 23a.

  FIG. 6 is a cross-sectional view showing a state in which the ear thermometer 1 configured as described above is inserted into the ear cavity Y which is a measurement site. In this figure, components and components already described are denoted by the same reference numerals and description thereof is omitted. When the power switch 5 is turned on, the thermistor 21 waits until the ambient temperature is detected. The waiting time for this measurement is the time until the pictograph of the liquid crystal display device 7 is completed. When the waiting time elapses, the probe 3 is inserted into the ear cavity Y as shown in the figure. At this time, excessive insertion due to the distance D between the probe cover loading tool 11 and the probe tip is prevented. The

  After the insertion, when the measurement switch 6 is turned on, the LED elements 13 are sequentially turned on, and a beep sound is generated from the speaker 12 to inform the end of the measurement. Thereafter, the body temperature is displayed on the liquid crystal display device 7, and the process ends when the body temperature is known by looking at this. In particular, since the measurement switch 6 is provided on the opposite side of the probe 3, consideration is given so that the insertion position of the probe 3 can be easily grasped when measuring by itself. When the power switch 5 is left after being turned on, it is automatically turned off to prevent battery consumption.

  FIG. 7 is a block diagram of the ear thermometer 1. In this figure, the same reference numerals are given to the components or parts already described, and the description is omitted. The thermistor 21 built in the detection element housing 20 shown by the broken line in the figure is mounted via the wiring 30. The amplifier 15 is connected to the substrate 15. Further, the infrared detection element 22 that detects the infrared IR is connected to the amplification unit 54 on the mounting substrate 15 via the wiring 30.

  The control unit 50 on the mounting substrate 15 includes a CPU element, a RAM 51 as a storage element, and a ROM 52, an LED element 13, a liquid crystal display device 7 having a standby and temperature display unit, a speaker 12 as a notification unit, The power switch 5 and the measurement switch 6 are connected. Moreover, it is comprised so that it may receive the electric power supply from the power supply part 8 which is a button battery, and may operate | move.

  Next, FIG. 8A is a cross-sectional view showing a state before the probe 3 is configured as a double tube and the detection element housing 20 is press-fitted so as to close the main opening 31 of the main probe body 103. FIG. 8B shows a state where the container member 225 of the detection element housing 20 is brought into contact with the end surface portion 32 after the press-fitting, and the back surface 23c of the mounting base member 23 is engaged with the engaging portion 33 and fixed. FIG. FIG. 9 is a cross-sectional view taken along line XX in FIG.

  In FIG. 8 and FIG. 9, the components or components already described are denoted by the same reference numerals and the description thereof is omitted, and the probe 3 includes a main probe body 103 having a main opening 31 having an opening at the tip thereof. The tube is configured as a double tube having a sub-opening 231 having an opening with its tip protruding so as to surround the main opening 31. With this configuration, an air layer K is formed between the outer peripheral surface 104 of the main probe body 103 and the inner peripheral surface 106 of the sub probe body 203.

  The main probe body 103 and the sub probe body 203 are formed between the outer peripheral surface 104 of the main probe body and the inner peripheral surface 106 of the sub probe body 203 within a range of about 6 to 15 mm from the sub opening 231. It is integrally formed through the connection part 105.

  The main opening portion 31 of the main probe body 103 is formed from the end surface portion 32 so as to be a circle having a diameter of about 3 to 4 mm. The end surface portion 32 is formed as an inner flange portion projecting inwardly from the inner side surface portion 34 of the main probe body 103, and a flat inner wall portion 35 is formed in an annular shape.

  On the other hand, the distance from the inner wall portion 35 is a distance h1 so that the height h1 is obtained by adding the thickness of the mounting base member 23 to the height of the outer peripheral surface 25a of the container member 25 of the detection element housing 20 described above. Engagement portions 33 having a height of about 1 to 2 mm and forming a contact surface 33a formed at the position h2 are integrally formed at three equal intervals of 120 degrees inward. The engaging portions 33 may be continuously formed over the entire circumference, and the number of arrangements may be two, four or more.

  In the above configuration, the detection element storage body 20 in which the wiring 30 is connected to the electrode leads 28 and 29 is prepared in advance, and the attachment base is used using the jig J illustrated by the broken line in FIG. By moving the back surface 23 c of the member 23 in the direction of the white arrow, the corner portion of the container member 25 first comes into contact with the inclined surface 33 b of the engaging portion 33. When moved further upward, the outer peripheral surface 25a of the container member 25 is in a state where the tip of the engaging portion 33 is guided, and when moved so as to press-fit further upward from this state, the lower edge of the outer peripheral surface of the container member 25 As a result of the part riding on the inclined surface 33b, the main probe body 103 is elastically deformed so as to expand in the radial direction. Subsequently, as shown in FIG. 8B, the window member 26 of the detection element housing 20 is exposed from the main opening 31 and the surface of the container member 25 contacts the inner wall 35 as shown in FIG. The back surface 23c of the member 23 is engaged with the engaging portion 33 and fixed. That is, as shown in FIG. 9, the back surface 23 c of the mounting base member 23 is supported by the three engaging portions 33.

  By fixing as described above, an air layer K is formed between the outer peripheral surface 104 of the main probe body 103 and the inner peripheral surface 106 of the sub probe body 203 as shown in FIG.

  By configuring as described above, the air layer K can function as a heat insulating layer. As a result, it is possible to eliminate the influence of thermal shock conducted through the probe that directly contacts the skin. Further, by moving the detection element storage body 20 using the jig J and press-fitting and fixing it, no adhesive is required, and the number of parts and man-hours can be reduced. Here, in FIG. 8, the configuration in which the window member 26 is located in the main opening portion 31 is illustrated and described. However, the window member 26 may be configured to be large and contact the inner wall portion 35 below the end surface portion 32. It goes without saying that it is good.

  As described above, at least two engagement portions 33 are formed inwardly, and the engagement portions 33 may be engaged with the back surface 23c of the mounting base member 23. Twelve engaging portions 33 may be provided. On the other hand, in the mold for injection-molding the probe 3, each engaging portion 33 is an under part, so that a slide piece or the like is required, resulting in a more expensive molding die. It may be prepared with a member and fixed as shown.

  FIG. 10 is a cross-sectional view showing the state after the detection element storage body 20 is press-fitted into the probe 3 of another configuration together with the probe cover (shown by a one-dot chain line). In this figure, the same reference numerals are given to the components or parts that have already been described, and the description is omitted. The liquid crystal display device 7 for displaying the measurement result of the body temperature is mounted on the mounting substrate 15 as described above. Yes. And this mounting substrate 15 is being fixed with respect to the main body base 2 for covering so that it may become a frame of a display surface. Therefore, by providing the probe 3 so as to be on the same side as the display surface of the liquid crystal display device 7 as shown, it is possible to connect directly from the lead terminals 28 and 29.

  For this purpose, the probe body 103 and the sub probe body 203 are integrally formed through the second connecting portion 205, and the mounting base of the detection element housing 20 is positioned so that the window member 26 is located deeper than the sub opening 231. 23 is fixed on the main opening 31 via a flange 63.

  Even when configured as described above, the air layer K is formed, so that it can function as a heat insulating layer. As a result, it is possible to eliminate the influence of a thermal shock that is thermally conducted.

(A) is the external appearance perspective view which looked at the ear-type thermometer 1 of one Embodiment of this invention from the probe side, (b) is the external appearance perspective view which looked at the ear-type thermometer 1 from the operation switch side. It is a three-dimensional exploded view of the ear-type thermometer 1 of FIG. FIG. 6 is an operation explanatory diagram of a probe cover mounting tool 11 for mounting the probe cover 10. FIG. 2 is a cross-sectional view taken along line XX in FIG. 1 after the probe cover 10 is attached. FIG. 3 is an external perspective view showing a part of a detection element housing 20 in a broken state. It is sectional drawing which showed a mode that the ear-type thermometer 1 was inserted in a measurement site | part. 1 is a block diagram of an ear thermometer 1. FIG. 8A is a cross-sectional view showing a state before the probe 3 is configured as a double tube, and the detection element housing 20 is press-fitted so as to close the main opening 31 of the main probe body 103, FIG. ) Is a cross-sectional view showing a state in which the container member 225 of the detection element housing 20 is brought into contact with the end surface portion 32 after being press-fitted, and the back surface 23c of the mounting base member 23 is engaged and fixed with the engaging portion 33. . It is XX arrow directional cross-sectional view of FIG.8 (b). It is sectional drawing which showed a mode that the detection element accommodating body 20 was fixed to the probe 3 of another structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ear-type thermometer 2 Main body base 3 Probe 4 Main body cover 5 Power switch 6 Measurement switch 7 Liquid crystal display device 8 Button battery 9 Button battery cover 10 Probe cover 11 Probe cover mounting tool 12 Speaker 13 LED element 15 Mounting board 20 Detection element storage body 21 Temperature detecting element 22 Infrared detecting element 23 Mounting base member 24 Hole 25 Container member 26 Window member 28 Lead terminal 30 Wiring 31 Main opening 32 End surface 33 Engagement section 34 Inner side 35 Inner wall 103 Main probe body 105 First Connecting portion 104 Outer peripheral surface 106 Inner peripheral surface 203 Sub probe body 231 Sub opening J Jig K Air layer

Claims (7)

A temperature detection element for detecting the environmental temperature and an infrared detection element for detecting infrared rays emitted from a temperature measurement site in the ear cavity are built in the probe, and body temperature is measured based on the detection results of the two detection elements. An ear thermometer,
The probe has a main probe body having a main opening with its tip opened, and a sub-opening with its tip opened and projecting so as to surround the main opening, and the outer periphery of the main probe body A sub-probe body that forms an air layer between the surface and the inner peripheral surface thereof, and is formed as a double tube,
An attachment base for fixing the two detection elements; a cylindrical container member that has a hole facing the infrared detection element on the main opening side and is fixed to the attachment base and surrounds the two detection elements; A window member that is attached to the hole and transmits infrared rays, and a detection element housing,
An ear-type thermometer, wherein the detection element storage body is fixed to the main probe body so as to close the main opening.   The main probe body and the sub probe body are formed between the outer peripheral surface of the main probe body and the inner peripheral surface of the sub probe body in a range of about 6 to 15 mm from the sub opening. The ear-type thermometer according to claim 1, wherein the ear-type thermometer is integrally formed through a connection portion.   The main probe body has an end surface portion formed in the main opening, an inner side surface of a hollow cylindrical body, and an engagement portion protruding inward from the inner side surface, and closes the main opening. As described above, the window member or the container member of the detection element housing is brought into contact with the surface of the end surface portion on the detection element side, and the attachment base member is engaged with and fixed to the engagement portion. The ear-type thermometer according to claim 1 or 2. Forming an inner wall extending radially from the main opening to the inner side surface;
The engaging portion is separated from the inner wall portion at a position corresponding to the height of the outer peripheral surface of the container member or a height of the outer peripheral surface of the container member plus the height of the window member material. A contact surface to be formed, and an inclined surface inclined from the inner side surface portion toward the probe center portion,
By press-fitting the detection element housing toward the main opening, the surface of the window member or the container member is brought into contact with the inner wall, and the back surface of the mounting base member is engaged with the contact surface. The ear-type thermometer according to claim 3, wherein   The ear-type thermometer according to claim 3 or 4, wherein at least two engagement portions are formed inwardly, and the engagement portions are engaged with a back surface of the attachment base member. A liquid crystal display device for displaying a measurement result of the body temperature; and a main body base for covering the liquid crystal display device, the probe and the main body base so that the probe is on the same side as the display surface of the liquid crystal display device Are integrally formed through the second connecting portion,
The ear-type thermometer according to claim 1, wherein the mounting base of the detection element housing is fixed on the main opening so that the window member is located deeper than the sub-opening.   The mounting base of the detection element housing fixes a lead terminal connected from the two detection elements, and the lead terminal has a total length and strength connectable to a mounting board fixed to the main body base. The ear-type thermometer according to claim 6.

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