JP5420391B2 - Electronic thermometer - Google Patents

Description

  The present invention relates to an electronic thermometer. In particular, the present invention relates to a rod-shaped electronic thermometer.

  Conventionally, an electronic thermometer has been widely used as a thermometer for measuring the temperature of a subject. In an electronic thermometer, a circuit board that calculates the body temperature of a subject based on the temperature detected by a temperature sensor, a battery that supplies power to the circuit board, and the like are usually attached to a predetermined holder, and the electronic thermometer It is mounted on. Also, a buzzer part for notifying the end of the body temperature measurement is directly attached inside the housing of the electronic thermometer. In order to protect these electronic components, the inside of the electronic thermometer generally has a liquid-tight structure.

JP 2002-195888 A

  However, in the case of an electronic thermometer that has a detachable cap and allows battery replacement, liquid can flow from the gap between the cap and the main body or from a screw hole for screwing the cap to the main body. There is sex. For this reason, in order to implement | achieve a liquid-tight structure, it is necessary to provide packing in several places, and cost starts.

  The present invention has been made in view of the above problems, and an object thereof is to realize a liquid-tight structure at low cost in an electronic thermometer capable of battery replacement.

An electronic thermometer according to the present invention includes a first housing on which a holder on which electronic components for body temperature measurement are mounted, a second housing configured to be detachable from the first housing, The first housing has a bottomless first screw hole for screwing the second housing, and the second housing is an outer periphery of the second housing. is configured to part of the surface is fitted into the inner peripheral surface of the first housing, and when is fitted a portion of the outer peripheral surface to the inner peripheral surface of said first housing, said first the inner peripheral surface of the second housing has a hollow structure which slides along the bottom surface of the holder, a portion of the outer peripheral surface is in a state of fitted into the inner peripheral surface of the first housing the first arranged at a position corresponding to the screw hole, the second screw hole in the bottom which is screwed by a first housing, said second screw And a packing member which is wound around the distal end side in the circumferential direction than the second housing is further out of the inner peripheral surface of the second housing, along the bottom surface of the holder sliding A rib is provided on a surface opposite to the surface to be engaged, and the rib is predetermined from the bottom surface of the holder in a state where a part of the outer peripheral surface is fitted to the inner peripheral surface of the first casing. The at least a part of the electronic component mounted on the holder is configured to regulate the movable range thereof, and the bottomed second screw hole is formed in the rib. that it has been formed in.

  According to the present invention, it is possible to realize a liquid-tight structure at low cost in an electronic thermometer capable of battery replacement.

It is a figure which shows the external appearance structure of the electronic thermometer 100 which concerns on one Embodiment of this invention. 1 is an exploded perspective view of an electronic thermometer 100. FIG. 2 is an exploded perspective view of a holder of the electronic thermometer 100. FIG. 3 is a diagram illustrating a configuration of a housing 102. It is the figure which showed a mode that the board | substrate was fixed by the projection part 301 of the housing. It is the figure which showed a mode that a battery was fixed by the rib 302 of the housing. It is the figure which showed a mode that the member for buzzers was fixed with the rib 303 of the housing. FIG. 6 is a view showing screw holes for fixing the casing 102 to the casing 101. It is the figure which showed the relationship between the screw hole of the housings 101 and 102, and packing.

  Hereinafter, the details of each embodiment of the present invention will be described with reference to the accompanying drawings as necessary. In addition, this invention is not limited to the following embodiment, It shall change suitably.

<1. External structure of electronic thermometer>
FIG. 1 is a diagram showing an external configuration of a rod-shaped electronic thermometer 100 according to an embodiment of the present invention. FIG. 1A is a plan view of the front side of the electronic thermometer 100, and FIG. 1B is a plan view of the back side of the electronic thermometer 100.

  In FIG. 1A, 101 is a main body housing (housing 101) of the electronic thermometer 100, and 102 is a tail housing (housing 102) of the electronic thermometer 100. The housing 102 is detachably attached to the housing 101.

  Reference numeral 103 denotes an end cap. The end cap 103 is covered with a metal such as stainless steel so that the body temperature of the subject can be easily conducted to a temperature measurement unit in which a temperature sensing element such as a thermistor is incorporated. A liquid crystal display unit 104 displays body temperature data and the like as a body temperature measurement result, and is covered with a window member 104a formed of a transparent thermoplastic resin. The window member 104a is two-color molded with a casing 101 formed of an impact-resistant thermoplastic resin, for example, butylene / styrene resin, and has high liquid tightness.

  In FIG. 1B, reference numeral 105 denotes a screw hole for screwing the housing 102 after attaching the housing 102 to the housing 101.

<2. Internal structure of electronic thermometer>
FIG. 2 is an exploded perspective view for explaining the internal configuration of the electronic thermometer 100. In FIG. 2, reference numeral 200 denotes a holder. The holder 200 is mounted with a circuit board mounting area 201 on which a circuit board for calculating the body temperature of the subject is mounted based on the temperature measured by the temperature measuring unit, and a liquid crystal display member for displaying the calculated body temperature. A liquid crystal display member mounting area 202 and a battery mounting area 203 on which a battery for supplying power to the circuit board and the liquid crystal display member are mounted.

  Reference numeral 210 denotes a buzzer part in which a diaphragm and a piezoelectric element are integrated to notify the end of body temperature measurement, and is inserted along an arrow from an insertion port 221 on the opposite side of the end cap 103 of the casing 101, and the casing 101 It is directly attached to the attachment member (not shown) of the back inner wall surface. Thereby, the buzzer component is electrically connected to a circuit board 301 described later.

  The holder 200 is inserted along the arrow through the insertion port 221 and attached to the housing 101 with the buzzer component 210 attached to the inner wall surface on the back side of the housing 101. When the holder 200 is attached to the casing 101, the button-type battery mounting area 203 is exposed to the outside of the casing 101, and is configured so that the user can easily replace the battery.

  The housing 102 is attached to the housing 101 by inserting the fitting portion 231 along the arrow through the insertion port 221 in a state where the holder 200 is attached to the housing 101. The casing 102 is formed of a thermoplastic resin material (for example, high impact polystyrene resin) for impact resistance and prevention of screw crushing. The fitting portion 231 has a hollow structure, and its outer wall is fitted to the inner wall of the casing 101, and the inner wall inserts the battery mounting region 203 of the holder 200.

<3. Configuration of holder>
FIG. 3 is a view for explaining the configuration of the holder 200 of the electronic thermometer 100, and shows a state seen from the back side of the electronic thermometer 100.

  In FIG. 3, reference numeral 301 denotes a circuit board that calculates the body temperature of the subject based on the temperature measured by the temperature measurement unit. A liquid crystal display member 302 displays the calculated body temperature. A button type battery 303 supplies power to the circuit board and the liquid crystal display member, and is attached to two places in the longitudinal direction of the casing 101. The circuit board 301, the liquid crystal display member 302, and the battery 303 are attached to the circuit board mounting area 201, the liquid crystal display member mounting area 202, and the battery mounting area 203, respectively.

<4. Structure of housing 102>
Next, a detailed configuration of the housing 102 will be described. 4A and 4B are diagrams for explaining a detailed configuration of the casing 102. FIG. 4A is a plan view of the casing 102, FIG. 4B is a side view of the casing 102, and FIG. ) Respectively show side views of the casing 102 when viewed from the insertion port 221 side.

  As shown in FIG. 4A, at both ends of the fitting portion 231 of the housing 102, the length is about 2.5 mm, the height is about 2.5 mm, and the width is about in consideration of the necessary minimum strength and action. A pair of 1 mm protrusions 401 is provided. Further, as shown in FIG. 4C, the fitting portion 231 of the housing 102 has a hollow structure so that the battery mounting region 203 can be inserted (see 402). Two different types of ribs (ribs 403 and 404) are provided. As shown in FIG. 4B, the ribs 403 and 404 extend in the entire insertion direction in the hollow structure 402.

<5. Function of the protrusion 401>
Next, the function of the protrusions 401 provided at both ends of the fitting portion 231 of the housing 102 will be described. FIG. 5 is a diagram for explaining the function of the protruding portions 401 provided at both ends of the fitting portion 231 of the housing 102.

  In FIG. 5, for easy understanding, the holder 200 attached to the housing 101 and the housing 102 before ((A)) and after ((B)) attachment to the housing 101 are extracted. In FIG. 5, the upper side of the drawing shows the front side of the electronic thermometer 100, and the lower side of the drawing shows the back side of the electronic thermometer 100.

  As shown in FIG. 5A, the circuit board 301 mounted in the circuit board mounting area 201 is attached to the position H2 from the front side plane 501 of the holder 200. Further, the protruding portion 401 is attached to the fitting portion 231 so that the front side end surface 502 is located at a distance H1 from the front side wall surface 503 of the hollow structure 402. Note that the distance H1 and the distance H2 are substantially equal.

  With this configuration, when the housing 102 is inserted in the insertion direction and the front side wall surface 503 of the housing 102 slides with respect to the front side plane 501 of the holder 200 and reaches a predetermined position, FIG. As shown in (B), the front side end surface 502 of the protrusion 401 comes into contact with the back side plane of the circuit board 301. As a result, the circuit board 301 is restrained from the back side to the front side of the electronic thermometer 100, and can be stably fixed to the holder 200. That is, the protrusion 401 has a function for stably fixing the circuit board 301 without rattling.

<6. Function of Rib 403>
Next, the function of the rib 403 provided in the housing 102 will be described. FIG. 6 is a diagram for explaining the function of the rib 403 of the housing 102.

  6, as in FIG. 5, in order to make the explanation easy to understand, the holder 200 in a state of being attached to the housing 101, and before ((A)) and after ((B)) attachment to the housing 101. In FIG. 6, the upper side of the drawing shows the front side of the electronic thermometer 100, and the lower side of the drawing shows the back side of the electronic thermometer 100.

  As shown in FIG. 6A, the two button-type batteries 303 mounted in the battery mounting area 203 are attached at a distance H4 from the front plane 501 of the holder 200. The rib 403 extends from the front side wall surface 503 of the hollow structure 402 to a position at a distance H3. Note that the distance H3 and the distance H4 are equal.

  With this configuration, when the casing 102 is inserted in the insertion direction and the front side wall surface 503 of the casing 102 slides with respect to the front side plane 501 of the holder 200 and reaches a predetermined position, FIG. As shown in (B), the rib 403 defines the position of the battery 303 (position relative to the back side direction of the electronic thermometer 100).

  The position of the battery 303 is fixed by a fixing member 601, but the fixing region of the fixing member 601 is only a part of the battery 303 in order to facilitate battery replacement by the user. For this reason, the rib 403 defines the position of the battery 303 in an area different from the area fixed by the fixing member 601, so that the battery 303 can be more stably fixed to the holder 200. That is, the rib 403 has a function for stably fixing the battery 303.

  Although not particularly shown in FIG. 6, it is assumed that the rib 403 is disposed so as to collide with the holder 200 when the casing 102 is to be inserted by being inverted between the front side and the back side. Thereby, when attaching the housing 102 to the housing 101, even if the front side and the back side are erroneously attached (so-called reverse insertion), the rib 403 collides with the holder 200 and the insertion is prevented. Become. That is, the rib 403 also has a function of preventing the casing 102 from being reversely inserted.

<7. Function of Rib 404>
Next, the function of the rib 404 provided in the housing 102 will be described. 7A and 7B are diagrams for explaining the function of the ribs 404 of the housing 102. FIG. 7A shows a state before the housing 102 is attached to the housing 101, and FIG. 7B shows a state after the housing 102 is attached to the housing 101. Each state is shown.

  As shown in FIG. 7A, an attachment member 701 for attaching a buzzer component 210 is provided on the back inner wall surface of the housing 101 of the electronic thermometer 100. The attachment member 701 has a U-shape having an opening that opens in the direction of the insertion port 221 at a distance H6 from the inner wall surface on the back side of the casing 101. Accordingly, the buzzer component 210 is attached to the attachment member 701 by inserting the buzzer component 210 from the opening.

  On the other hand, the rib 404 extends from the back inner wall surface of the casing 101 to a position of a distance H5 in a state where the fitting portion 231 is inserted from the insertion port 221 and attached to the casing 101. Note that the distance H5 and the distance H6 are substantially equal.

  With this configuration, when the housing 102 is inserted in the insertion direction and reaches a predetermined position, the rib 404 suppresses the opening of the attachment member 701 as shown in FIG. Become. As a result, the buzzer component 210 does not jump out of the opening of the attachment member 701 and can be stably fixed to the housing 101. That is, the rib 404 has a function for stably fixing the buzzer component 210.

<8. Configuration for attaching housing 102>
Next, the structure for attaching and screwing the housing 102 to the housing 101 will be described. FIG. 8 is a diagram for explaining a configuration of a screw hole 800 provided at a position corresponding to the screw hole 105 of the housing 101 when the housing 102 is attached to the housing 101 and screwed. The top view at the time of seeing the housing 102 from the back side, (B) has each shown AA sectional drawing of the housing 102. FIG.

  As shown in FIG. 8A, the screw hole 800 is provided on the back surface of the fitting portion 231. Further, when the fitting portion 231 is fitted to the inner wall surface of the housing 101, the screw hole 800 is inserted in a direction more than the packing 801 for liquid-tightening between the fitting portion 231 and the inner wall surface of the housing 101. It is provided upstream.

  Further, as shown in FIG. 8B, the bottom surface of the screw hole 800 is located in a rib 404 provided on the back inner wall surface of the fitting portion 231. This portion of the casing 102 is about twice as thick as the other portions due to the ribs 404. That is, the screw hole 800 does not penetrate the fitting portion 231 and has a bottomed screw hole structure.

<9. Function of screw hole 800>
Next, the function of the screw hole 800 provided in the housing 102 will be described. FIG. 9 is a diagram for explaining the function of the screw hole 800 of the housing 102, (A-1) shows a state before the housing 102 is attached to the housing 101, and (A-2) shows The state after attaching the housing 102 to the housing 101 is shown. Moreover, (B-1) is an AA cross-sectional view in (A-2), and shows a state before the housing 101 and the housing 102 are screwed, and (B-2) is ( It is AA sectional drawing in A-2), Comprising: The state after screwing the housing 101 and the housing 102 is shown.

  As shown in FIG. 9A-1, the fitting portion 231 of the housing 102 is provided with a screw hole 800 at a position corresponding to the screw hole 105 of the housing 101, so that the housing 102 is attached to the housing 101. 9A-2, the screw hole 105 and the screw hole 800 overlap each other.

  Further, as shown in FIG. 9 (B-1), the screw hole 800 provided in the fitting portion 231 is a bottomed screw hole and provided upstream of the packing 801 in the insertion direction. Yes. For this reason, as shown in FIG. 9 (B-2), the inflow paths 901 and 902 are the only inflow paths of the liquid into the electronic thermometer 100. That is, since the screw hole 800 is bottomed, the inflow of liquid into the electronic thermometer 100 through the inflow paths 903 and 904 can be avoided.

  Further, the inflow into the electronic thermometer 100 through the inflow paths 901 and 902 can be suppressed by the packing 801. That is, in the fitting portion 231, it is possible to avoid the inflow of liquid into the electronic thermometer 100 with only the packing provided on the downstream side of the screw hole 800 in the insertion direction (the packing needs to be provided at a plurality of positions). And a liquid-tight structure can be reliably realized).

  In addition, the screw 910 shown to FIG. 9 (B-1) and (B-2) shall be comprised by the SUS material which adsorb | sucks to magnetic force. Further, the screw pitch width is made larger than that of the conventional one to prevent thread breakage, and the screw head is made larger than that of the conventional one to prevent rattling.

DESCRIPTION OF SYMBOLS 100 ... Electronic thermometer, 101 ... Housing, 102 ... Housing, 103 ... End cap, 104 ... Liquid crystal display part, 105 ... Screw hole, 200 ... Holder, 201 ... Circuit board mounting area 202 ... Liquid crystal display member mounting area 203 ... Battery mounting area 210 ... Buzzer parts 221 ... Insertion port 231 ... Fitting part 301 ..Circuit board 302 ... Liquid crystal display member 303 ... Battery 401 ... Projection part 402 ... Hollow structure 403 ... Rib 404 ... Rib 501 ... Holder ,..., Front surface side surface of the projecting part, 503... Front wall surface of the hollow structure, 601... Fixing member, 701. 901 to 904... Inflow route, 10 ... screw

Claims (1)

An electronic thermometer comprising: a first housing on which a holder on which an electronic component for body temperature measurement is mounted is placed; and a second housing configured to be detachable from the first housing. ,
The first housing has a bottomless first screw hole for screwing the second housing;
The second housing is
A portion of the outer peripheral surface of the second housing is configured to fit into the inner peripheral surface of the first housing; and
When is fitted a portion of the outer peripheral surface to the inner peripheral surface of the first housing, a hollow structure the inner peripheral surface of the second housing slides along the bottom surface of the holder And
A part of the outer peripheral surface is
In a state fitted to the inner peripheral surface of the first housing, the disposed position corresponding to the first screw hole, a second threaded blind bore that is screwed by the first housing When,
A packing member wound in the circumferential direction on the tip side of the second screw hole ;
The second casing is further provided with a rib on a surface facing the surface sliding along the bottom surface of the holder among the inner peripheral surface of the second casing.
The rib is mounted on the holder by being positioned at a predetermined distance from the bottom surface of the holder in a state where a part of the outer peripheral surface is fitted to the inner peripheral surface of the first casing. Further, at least a part of the electronic component is configured to regulate the movable range thereof,
Said second threaded blind bore, the electronic thermometer characterized that you have been formed in the rib.

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