JPH08129076A - Wrist watch - Google Patents

Abstract

PURPOSE: To make the pressure inside a water-proof wrist watch agree with the atmospheric pressure by forming an air introduction opening at the wrist watch and opening/closing the opening by a push button or the like. CONSTITUTION: This wrist watch can be switched by a push button 13 into a mode to measure the blood pressure. The push button 13 is air-tightly engaged with a case 14 by a packing 18. Moreover, a semiconductor pressure sensor communicates with the side of a reference pressure through a groove 15. A packing 17 and an auxiliary member 16 intended to shut between the interior of the watch and the space of a push button part are set inside a case. The auxiliary member 16 has a packing 19 to be air-tightly engaged with the button 13. When the button 13 is depressed fully to switch the mode, the packing 18 is separated from an end part 14a of the case, so that the groove 15 is opened to the outside air. An air introduction opening is opened only when the blood pressure is measured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wristwatch, and particularly to a wristwatch having a relative pressure sensor inside the wristwatch.

[0002]

2. Description of the Related Art A wristwatch has multiple functions and many functions are added, one of which is a blood pressure monitor. If you can always measure your blood pressure with your wrist watch, it is convenient because not only people with high or low blood pressure but also healthy people can always check their physical condition.

Wristwatches capable of measuring blood pressure have already been commercialized. The measurement principle is to measure the cardiac potential and pulse wave transit time,
It is calculated by a program that calculates blood pressure based on the systolic blood pressure and the diastolic blood pressure that have been measured and input in advance. Therefore, a wristwatch capable of measuring blood pressure has a drawback that it cannot be used by others because it is for personal use.

In order to solve the above-mentioned drawbacks, a wristwatch conforming to the cuff type (usually, blood pressure is measured at the upper arm. The blood pressure meter is mainly a rubber bag wrapped around the arm, which is called the cuff type). I examined whether I could do it. It was confirmed that the digital sphygmomanometer using a semiconductor pressure sensor can be downsized and can be incorporated into a wristwatch. There are an absolute pressure sensor and a relative pressure sensor in the semiconductor pressure sensor, but a relative pressure sensor can be used in the sphygmomanometer.

[0005]

Although the semiconductor pressure sensor has many features, it has the drawback that the zero-point drift due to temperature is large, and therefore the relative pressure sensor must be opened to atmospheric pressure each time it is measured. . Further, since the blood pressure is a slight pressure, it is affected by the atmospheric pressure, and therefore it is necessary to open the relative pressure sensor to the atmospheric pressure each time the measurement is performed.

In order to open the pressure sensor incorporated in the waterproof watch to the atmosphere, it is necessary to provide a hole for connecting the inside of the wristwatch with the outside air while maintaining the waterproof property.

FIG. 4 is a partial sectional view of a wristwatch having a relative pressure sensor for explaining the present invention, and FIG. 5 is a top view thereof. The case 1 has a stepped recess and a hole 6. The semiconductor pressure sensor 2 is housed in the concave portion, and the upper portion is covered with the lid member 8 in a state where a space connected to the hole 6 is provided. The case 1 and the lid member 8 are kept airtight by the seal member 9.

The semiconductor pressure sensor 2 has a semiconductor pressure sensor chip 3 fixed to a container 11, and the semiconductor pressure sensor chip 3 has a diaphragm portion in which a gauge resistor for sensing pressure provided in a semiconductor is embedded. The hole 12 formed in the container is one side (lower surface) of the diaphragm.
Is for applying an atmospheric pressure (reference pressure) to the semiconductor pressure sensor 2 and is open to the space 10 below the semiconductor pressure sensor 2. A nozzle 4 that engages with a hole 6 is connected to a rubber bag having an air chamber 5, and a packing 7 is provided on the outer periphery of the nozzle 4 so that it can be engaged with the hole 6 in an airtight manner. The rubber bag is sandwiched between the wristwatch and the arm, and air is put into the air chamber 5 by the pump to pressurize it. Since the air chamber 5 and the upper surface of the diaphragm of the semiconductor pressure sensor are open, the pressure can be measured.

Since the space 10 serving as the reference pressure is in the case 1 and is an airtight space, a pressure difference with the atmosphere is generated. As described above, when measuring blood pressure, the reference pressure must be the same as atmospheric pressure.

[0010]

According to the present invention, a waterproof wristwatch is provided with an outside air inlet for matching the pressure of the inside of the wristwatch with the pressure of the atmosphere, if necessary. The outside air inlet for making the reference pressure of the relative pressure sensor equal to the atmospheric pressure each time of measurement is opened or closed by a push button, a crown, or a register ring.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a first embodiment of the present invention, and is a partial cross-sectional view of the main part of the structure for opening and closing the outside air introduction port with a push button. The push button 13 is for switching the mode of the wristwatch to blood pressure measurement. 18 is a packing for hermetically engaging the push button 13 and the case 14. Reference numeral 15 is a groove communicating with the reference pressure side of the semiconductor pressure sensor. Inside the case, there are a packing 17 and an auxiliary member 16 for the purpose of shielding the inside of the timepiece from the push button space, and the auxiliary member 16 has a packing 19 for hermetically engaging the push button 13. ing. When the push button 13 is pushed down to switch the mode, the packing 18 is released from the end 14a of the case and the groove 15 and the outside air are opened.

FIG. 2 is a second embodiment of the present invention and is a main part sectional view of a structure for opening and closing the outside air introduction port by a crown. A winding stem 21 is connected to the crown 20 and
By pulling out, the switching member (not shown) engaged with the winding stem 21 is actuated, and the calendar correction position, the display needle correction position, etc. are reached. In this embodiment, the packing 22 attached to the crown is removed from the hole 23 of the case when pulled out to the maximum, and the inside of the case and the outside air are opened. Other structures are the same as in the first embodiment.

FIG. 3 shows a third embodiment of the present invention, and is a main sectional view of a structure for opening and closing the outside air introduction port by a register ring. Hole 24 communicating with the reference pressure side (outside air inlet)
Is formed on the sliding surface of the register ring. One of the register rings 26 is open to the outside air and the other is the hole 24.
A hole 25 is opened to the inside. A packing 27 for keeping the sliding surface of the case and the register ring 26 airtight is provided around the hole 24. According to this structure, the outside air introduction port is opened only when the hole 24 provided in the case and the hole 25 provided in the register ring are aligned with each other.

The outside air inlet is opened only when measuring blood pressure, and water does not enter at the time of opening,
It is safer to hermetically separate the storage portion of the semiconductor pressure sensor from the storage portion of other timepiece parts.

[0015]

【The invention's effect】

1. According to the present invention, the inside of the timepiece and the outside air can be released, so that the inside of the timepiece and the atmospheric pressure can be matched. According to 2.1, it is possible to realize a sphygmomanometer in which the relative pressure sensor is incorporated in the watch. According to 3.2, one blood pressure monitor can be used by multiple people on the spot.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part in a first embodiment of the present invention.

FIG. 2 is a sectional view of a main part in a second embodiment of the present invention.

FIG. 3 is a sectional view of a main part in a third embodiment of the present invention.

FIG. 4 is a sectional view of a main part of a wrist watch having a relative pressure sensor for explaining the present invention.

FIG. 5 is a top view of a main part of a wrist watch having a relative pressure sensor for explaining the present invention.

[Explanation of symbols]

 1 Case 2 Semiconductor Pressure Sensor 3 Semiconductor Pressure Sensor Chip 4 Nozzle 5 Air Chamber 6 Hole 7 Packing 8 Lid Member 9 Sealing Member 10 Space 11 Container 12 Hole 13 Push Button 14 Case 14a Case Edge 15 Groove 16 Auxiliary Member 17 Packing 18 Packing 19 Packing 20 Crown 21 Winding stem 22 Packing 23 Hole 24 Hole (outside air inlet) 25 Hole 26 Register ring 27 Packing

Claims (5)

[Claims] 1. A wristwatch having a waterproof structure, which is provided with an outside air inlet. 2. The wristwatch according to claim 1, wherein the outside air inlet is opened and closed by a push button. 3. The wristwatch according to claim 1, wherein the outside air inlet is opened and closed with a crown. 4. The wristwatch according to claim 1, wherein the outside air inlet is opened and closed by a register ring. 5. A relative pressure sensor inside the wristwatch,
5. The wristwatch according to claim 1, 2, 3, or 4, wherein the relative pressure sensor and the other timepiece parts are hermetically separated from each other.