JP3160911U - Ear thermometer - Google Patents

Abstract

When each detection element is fixed adjacent to an opening of a probe, the opening of the probe can always be maintained in a liquid-tight state, can sufficiently withstand external force, and cost can be reduced. An ear thermometer is provided. An ear-type thermometer for measuring a body temperature by incorporating 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 into a probe. The probe has an end surface portion 32 formed so as to have an opening 31 at the tip thereof, an inner side surface portion 34 of the hollow cylindrical body, and an engaging portion 33 protruding inward, and the detection element storage body 20 is probed. The O-ring 40 is further provided between the window members 26. [Selection] Figure 8

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.

  A thermistor, which is a temperature detection element, and a thermopile composed of a cold junction and a hot junction are provided at positions separated from the probe opening, and infrared rays introduced from the probe opening are guided to the thermopile using a light guide tube. An ear-type thermometer configured so as to be 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, it is only necessary to directly arrange each detection element in the opening of the probe. An ear thermometer having a structure in which an element is fixed adjacent to an opening of a probe has been proposed.

  On the other hand, when each detection element is fixed in the vicinity of the opening of the probe, if a foreign substance, liquid, or the like enters the inside of the probe through the opening of the probe, accurate body temperature measurement cannot be performed due to these effects. In particular, it is necessary to be able to maintain a liquid-tight state in preparation for the case where the opening of the probe is cleaned in a state where alcohol is soaked in a cotton swab. Further, it is necessary to be able to withstand the external force applied toward the inside of the probe when performing such cleaning.

JP-A-11-123179

  Therefore, the present invention has been made in view of the circumstances as described above, and when each detection element is fixed adjacent to the probe opening, the probe opening can always be maintained in a liquid-tight state. In addition, an object of the present invention is to provide an ear-type thermometer that can sufficiently withstand external force and can realize cost reduction.

  In order to solve the above-described problems, according to the ear thermometer of the present invention, 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 are probed. And an ear-type thermometer that measures body temperature based on the detection results of the two detection elements, wherein the probe has an end surface portion formed to have an opening at a tip thereof, and a hollow cylindrical body. An inner surface portion, an engagement portion projecting inwardly from the inner surface portion, an attachment base member for fixing the two detection elements, and a hole facing the infrared detection element on the opening side A detection element housing comprising: a cylindrical container member fixed to the attachment base member and enclosing the two detection elements; and a window member attached on the hole to close the hole and transmit infrared rays Equipped with a body, The window member of the detection element housing is brought into contact with the detection element side surface of the end surface portion so as to close the opening of the probe via a seal member, and the mounting base member is the engagement portion It is characterized by being fixed by.

  Further, the surface on the detection element side extends in the radial direction from the opening to the inner side surface portion, and forms an inner wall portion in which a groove portion for accommodating the seal member is formed. A contact surface formed away from the inner wall so as to be a position obtained by subtracting the elastic deformation of the seal member from a position obtained by adding the height of the window member to the height of the outer peripheral surface of the container member And an inclined surface inclined from the inner side surface portion toward the center of the probe, and press-fitting the detection element housing toward the opening so that the surface of the window member compresses the seal member The back surface of the attachment base member is engaged with the contact surface.

The mounting base member includes an outer flange extending in a radial direction from an edge thereof, and a back surface of the outer flange is engaged with the contact surface of the engagement portion. .

Further, the outer flange has a disk-shaped portion, the engagement portions are formed inwardly at least two pieces, and the engagement portions are engaged with the back surface of the disk-shaped portion. It is said.
Further, the outer flange is characterized in that at least two protrusions are extended in the radial direction, and an engaging part that engages with the protrusion is continuously formed on the inner peripheral surface of the probe.

  Further, the sealing member is characterized in that the cross section thereof is made of a rubber, an elastomer, or a metal O-ring having a circular shape, a diamond shape, a C shape, and an inverted C shape.

  In addition, the seal member is a liquid adhesive that fills the groove so that the liquid surface uniformly overflows from the groove and maintains a liquid-tight state after curing.

  The apparatus further includes a main body cover that covers a liquid crystal display device that displays a measurement result of body temperature, and the probe is integrally formed with the main body cover so as to be on the same side as the display surface of the liquid crystal display device. . Here, further features of the present invention will become apparent from the embodiments for carrying out the present invention and the accompanying drawings.

  According to the present invention, when each detection element is fixed adjacent to the opening of the probe, the opening of the probe can always be maintained in a liquid-tight state, can withstand external forces sufficiently, and cost is reduced. Can be realized.

(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. (A) is sectional drawing which showed the mode before press-fitting the detection element storage body 20 so that the opening of a probe might be plugged up, (b) is the window member 26 of the detection element storage body 20 contact | abutted to the O-ring 40 after press-fit. Sectional drawing which showed a mode that the back surface 23c of the attachment base member 23 was engaged with the engaging part 33, and was fixed, (c) is XX arrow sectional drawing of (b). (A) is sectional drawing which showed the mode after press-fitting the detection element storage body 20 of another structure so that the opening of a probe might be plugged up, (b) is XX arrow sectional drawing of (a), (c ), The container member 20 of the detection element housing 20 is brought into contact with the O-ring 40 after the press-fitting, the back surface 23c of the mounting base member 23 is engaged and fixed, and the window member 26 is placed in the opening 31. It is sectional drawing which showed a mode that it located.

  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 resin materials colored in different colors. In particular, the main body cover 4 is made of a translucent resin, and two light emitting LED elements 13 provided therein are provided. 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 (in particular, preferably the tympanic membrane and / or its surroundings) has an outer diameter of the tip of about 3. 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, mounting studs 2b and 2h are integrally formed in the main body base 2 at positions corresponding to 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 connected to 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 one-dot chain 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, the main body base 2 is integrally formed with a concentric stepped portion 2x that comes into contact with the lower surface of the flange portion 10f of the probe cover 10 (shown by a one-dot chain line in the figure) 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 the respective locking projection portions 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 an opening 31 at the tip thereof and an inner side surface portion of the hollow cylindrical body, and an opening portion 2 a of the main body base 2. It is formed so as to communicate with. 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 base 23b of a 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 to detect a relative temperature change. 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 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 detection element housing 20 is press-fitted so as to close the opening of the probe, and FIG. 8B is a window member 26 of the detection element housing 20 after the press-fitting. FIG. 8C is a cross-sectional view showing a state in which the rear surface 23c of the mounting base member 23 is engaged with and fixed to the engaging portion 33, and FIG. It is X-ray arrow sectional drawing.

  In this figure, components and components that have already been described are given the same reference numerals and description thereof is omitted, and the opening 31 of the probe 3 is formed at the apex portion of the chamfered portion 32c of the end surface portion 32 of the probe 3 as shown in the figure. It is integrally molded so that its diameter dimension d1 is a circle of about 3 to 4 mm. The end surface portion 32 forms a flat inner wall portion 35 in an annular shape as an inner flange portion projecting inwardly from a portion of the inner side surface portion 34 of the probe 3. A groove 36 having an outer diameter d2 smaller than the inner diameter of the inner side surface 34 is formed on the inner wall 35. The groove 36 accommodates an O-ring (gasket) 40 that is a seal member by moving it in the direction of the arrow. The outer diameter dimension d2 of the groove 36 is set larger than the diameter d3 of the window member 26. On the other hand, the container 20 is separated from the inner wall 35 by a distance h2 so that the height h1 is obtained by adding the height of the window member 26 to the height of the outer peripheral surface 25a of the container member 25 of the container 20. Engagement portions 33 having a height of about 1 to 2 mm on which the formed contact surface 33a is formed are integrally formed at 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 or 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 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 further moved upward, the outer peripheral surface 25a of the container member 25 is in a state in which the tip of the engaging portion 33 is guided, and the flange portion 23a (see FIG. 5) of the mounting base member 23 comes into contact with the inclined surface 33b. If it moves so that it may further press-fit from this state, as a result of the edge part of the collar part 23a riding on the inclined surface 33b, the probe 3 is elastically deformed so as to expand in the radial direction.

  Subsequently, when it moves upward, the surface of the window member 26 of the detection element housing 20 contacts the O-ring (gasket) 40 so as to close the opening 31 of the probe 3 as shown in FIG. As a result of the elastic deformation of the protruding O-ring 40, a liquid-tight state can be maintained. Further, since the window member 26 is fixed on the container member 25, the window member 26 is not dropped from the hole 24 by an external force. Then, the back surface 23c of the mounting base member 23 is engaged with the engaging portion 33 and fixed. That is, as shown in FIG. 8C, 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 can be formed between the inner side surface portion 34 of the probe 3 and the outer peripheral surface 25a of the container member 25 as shown in FIG.

  Here, the O-ring (gasket) 40 having a circular cross section is generally used as the seal member, but other than this, the cross-sectional shape is made of a rubber or an elastomer having a rhombus, a C shape, or an inverted C shape. An O-ring (gasket) 40 can also be used. Alternatively, a metal O-ring may be used.

  Further, as the sealing member, a liquid adhesive that is filled so that the liquid surface thereof uniformly overflows from the groove 36 and is cured so as to maintain a liquid-tight state after the curing can be used.

  By configuring as described above, the air layer K can function as a heat insulating layer, so that it is possible to eliminate the influence of thermal shock conducted through the probe that directly contacts the skin. Further, by fixing the detection element housing 20 from above and below via an O-ring (gasket) 40 between the opening 31 and the engaging portion 33, the number of parts and the number of man-hours can be reduced.

  As described above, the outer flange has a disk-shaped portion, and at least two engaging portions 33 are formed inward, and the engaging portions 33 are engaged with the back surface of the disk-shaped portion. You can do that. Alternatively, twelve engaging portions 33 may be provided every 30 degrees. 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. 9A is a cross-sectional view showing a state after the detection element housing 20 having another configuration is press-fitted into the probe 3 having another configuration, and FIG. 9B is a view taken along line XX in FIG. 9A. FIG. 9C is a cross-sectional view showing that the window member 26 of the detection element housing 20 is brought into contact with the O-ring 40 after the press-fitting, and the back surface 23c of the mounting base member 23 is engaged with and fixed to the engaging portion 33. FIG. 5 is a cross-sectional view showing a state in which a member 26 is positioned in an opening 31.

  In FIGS. 9A and 9B, the same reference numerals are given to the components or parts that have already been described, and the description thereof is omitted. From the edge of the mounting base member 23, three protrusions are spaced at 120 degree intervals. 23d is extended in the radial direction. On the other hand, an annular engaging portion 33 is integrally formed from the inner side surface portion 34 of the probe 3, and the projection 23 d is supported by the contact surface of the annular engaging portion 33.

On the other hand, in FIG. 9C, after press-fitting as described above, the container member 20 of the detection element housing 20 is brought into contact with the end surface portion 32 as shown in the figure, and the back surface 23c of the mounting base member 23 is engaged with the engaging portion 33. The window member 26 is configured to be in contact with the O-ring (gasket) 40 and to be positioned in the opening 31. Even when configured as described above, the liquid-tight state can be maintained.

Claims (8)

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 an end surface portion formed so as to have an opening at a tip thereof, an inner side surface portion of a hollow cylindrical body, and an engagement portion protruding inward from the inner side surface portion,
An attachment base member that fixes the two detection elements; a cylindrical container member that has a hole facing the infrared detection element on the opening side and is fixed to the attachment base member so as to surround the two detection elements; And a window member that is attached to the hole and closes the hole and transmits infrared rays,
The window member of the detection element housing is in contact with the detection element side surface of the end surface portion so as to close the opening of the probe via a seal member, and the mounting base member is the engagement portion Ear thermometer, characterized by being fixed by The surface on the detection element side forms an inner wall portion extending in a radial direction from the opening to the inner side surface portion and forming a groove portion for accommodating the seal member,
The engaging portion is separated from the inner wall portion so as to be a position obtained by subtracting the elastic deformation of the seal member from a position obtained by adding the height of the window member to the height of the outer peripheral surface of the container member. Forming a contact surface 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 opening, the surface of the window member is brought into contact with the seal member and the back surface of the mounting base member is engaged with the contact surface. The ear-type thermometer according to claim 1.   The said mounting base member is provided with the outer collar part extended in the radial direction from the edge part, The back surface of the said outer collar part is engaged with the said contact surface of the said engaging part. The ear-type thermometer according to 2.   The outer flange has a disk-shaped part, and the engaging parts are formed inwardly at least two pieces, and the engaging parts are engaged with the back surface of the disk-shaped part. The ear-type thermometer according to claim 3.   The said outer collar part extended at least 2 protrusion part to radial direction, and the engaging part engaged with the said protrusion part was continuously formed in the said internal peripheral surface of the said probe. Ear thermometer as described.   6. The seal member according to claim 1, wherein the seal member is made of a rubber, an elastomer, or a metal O-ring having a circular, diamond-shaped, C-shaped, or inverted-C-shaped cross section. Ear thermometer as described.   6. The seal member is a liquid adhesive that fills the groove portion so that the liquid surface thereof uniformly overflows from the groove portion and maintains a liquid-tight state after curing. The ear-type thermometer according to any one of the above.   The main body cover for covering the liquid crystal display device for displaying the measurement result of the body temperature is further provided, and the probe is integrally formed with the main body cover so as to be on the same side as the display surface of the liquid crystal display device. The ear-type thermometer according to any one of 1 to 7.

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