JP4862940B2 - Biological information measuring device - Google Patents

Description

  The present invention relates to a biological information measuring device.

Conventionally, wristwatches having a function of measuring biological information such as pulse and blood pressure are known. For example, in a wristwatch, an air chamber is formed in a case body, a cuff communicating with the air chamber is provided, and a pressure sensor is provided so as to face the air chamber (see, for example, Patent Document 1). In this wristwatch, the air in the cuff is intermittently pressurized in accordance with the pulsation of the blood vessel of the wrist, and is transmitted to the air chamber as a pressure fluctuation. The pressure change in the air chamber is detected by a pressure sensor and displayed as blood pressure.
By the way, as a band for mounting such a wristwatch on a wrist, for example, a band that can be fixed to a wrist by inserting a stick provided on a buckle into a hole formed in the band is known. (For example, refer to Patent Document 2).

Japanese Utility Model Publication No. 6-11701 JP 2001-87013 A

  However, in the case of the band described in Patent Document 2, the degree of tightening of the wristwatch on the wrist is adjusted based on the interval between the holes formed in the band. By adjusting the length, the degree of tightening of the wristwatch having a pulse measurement function on the wrist varies depending on the wearer's preference. Therefore, when wearing the watch relatively tightly on the wrist, the cuff and the wrist are in close contact, so the pulsation is reliably transmitted to the cuff and there is no problem with the measurement, but when the watch is worn loosely on the wrist Has a problem that a gap is formed between the cuff and the wrist, and the pulse and blood pressure cannot be reliably detected.

  Accordingly, an object of the present invention is to provide a biological information measuring device that can be brought into close contact with the wrist and reliably detect biological information regardless of the degree of tightening of the wearer on the wrist.

In order to solve the above problems, the present invention has the following configuration.

The biological information measuring apparatus according to the invention of claim 1 (e.g., wristwatch 500 in FIG. 13, 14) is,
A biological information detection unit (for example, the pulse detection unit P in FIGS. 13 and 14) that detects biological information based on the pulsation of the artery near the wrist (for example, the wrist R in FIGS. 13 and 14);
Bands (for example, the band 2D (first band 207, second band 208) in FIGS. 13 and 14) for mounting the apparatus main body (for example, the apparatus main body 1 in FIGS. 13 and 14) having the biological information detection unit on the wrist. )When,
A first stretchable portion (for example, the first stretchable member 21e in FIGS. 13 and 14) provided on the back side of the band and stretchable in the thickness direction of the band;
Provided inside of the band, the second extensible portion of elastic in the thickness direction of the band (e.g., a second elastic member 22e of Fig. 13, 14) comprises a,
The first stretchable part and the second stretchable part are made of a stretchable fiber material .

According to the first aspect of the present invention, when the apparatus main body is attached to the wrist by the band, a tensile force acts on the band by the operation of the wearer, and the wrist is provided on the back side of the band by the tensile force. The apparatus main body is attached to the wrist in a state in which the first expansion / contraction part contacting with the first compression / contraction part is compressed in the thickness direction and the first expansion / contraction part is compressed. When the wearer removes his / her hand from the band after the apparatus main body is mounted, a restoring force for restoring the original state acts on the compressed first stretchable part, and the first stretchable part is Try to return to the thickness of. Since the inner diameter of the band is reduced by the first stretchable portion returning to the original thickness, the band is tightened.
Further, the second stretchable part provided inside the band is compressed in the thickness direction by the tensile force acting on the band, and the apparatus main body is attached to the wrist in a state where the second stretchable part is compressed. When the wearer removes his / her hand from the band after the apparatus main body is mounted, a restoring force for restoring the original state acts on the compressed second stretchable part, and the second stretchable part becomes the original Try to return to the thickness of. The band expands and tightens because the inner diameter of the band is reduced by the second stretchable portion returning to the original thickness.
Thus, even when the wearer tightens the band loosely, the apparatus main body comes into close contact with the wrist by tightening the band.
Therefore, regardless of the degree of tightening of the apparatus main body to the wrist by the wearer, the apparatus main body can be brought into close contact with the wrist, and biological information can be detected reliably.

According to the first aspect of the invention , not only that, the first stretchable portion and the second stretchable portion are made of stretchable fiber material. Since the material is lightweight, the weight of the band can be reduced.

According to the first aspect of the present invention, when the apparatus main body is attached to the wrist by the band, a tensile force acts on the band by the operation of the wearer, and the wrist is provided on the back side of the band by the tensile force. The apparatus main body is attached to the wrist in a state in which the first expansion / contraction part contacting with the first compression / contraction part is compressed in the thickness direction and the first expansion / contraction part is compressed. When the wearer removes his / her hand from the band after the apparatus main body is mounted, a restoring force for restoring the original state acts on the compressed first stretchable part, and the first stretchable part is Try to return to the thickness of. Since the inner diameter of the band is reduced by the first stretchable portion returning to the original thickness, the band is tightened.
Further, the second stretchable part provided inside the band is compressed in the thickness direction by the tensile force acting on the band, and the apparatus main body is attached to the wrist in a state where the second stretchable part is compressed. When the wearer removes his / her hand from the band after the apparatus main body is mounted, a restoring force for restoring the original state acts on the compressed second stretchable part, and the second stretchable part becomes the original Try to return to the thickness of. The band expands and tightens because the inner diameter of the band is reduced by the second stretchable portion returning to the original thickness.
Thus, even when the wearer tightens the band loosely, the apparatus main body comes into close contact with the wrist by tightening the band.
Therefore, regardless of the degree of tightening of the apparatus main body to the wrist by the wearer, the apparatus main body can be brought into close contact with the wrist, and biological information can be detected reliably.

According to the first aspect of the present invention, the thickness of the band is not limited thereto, and is provided on the back side of the band and is extendable in the thickness direction of the band. The second stretchable portion that is stretchable in the vertical direction is made of a stretchable fiber material. Therefore, among the stretchable materials, the fiber material is lightweight, so the weight of the band can be reduced. .

It is a top view of the wristwatch in the present invention. It is sectional drawing before wrist wearing of the wristwatch in Embodiment 1 of this invention, and is II-II sectional drawing of FIG. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 1 of this invention. It is an expanded sectional view of the apparatus main body of the wristwatch in the present invention. It is an expanded sectional view of the pulse detection part of the wristwatch in the present invention. It is sectional drawing of the back cover part of the wristwatch in this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 2 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 2 of this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 3 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 3 of this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 4 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 4 of this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 5 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 5 of this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 6 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 6 of this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 7 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 7 of this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 8 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 8 of this invention. It is sectional drawing before wrist mounting | wearing of the wristwatch in Embodiment 9 of this invention. It is sectional drawing after wrist mounting | wearing of the wristwatch in Embodiment 9 of this invention.

BEST MODE FOR CARRYING OUT THE INVENTION The best embodiment of the biological information measuring device according to the present invention will be described in detail below. In the present embodiment, a wristwatch with a pulse measuring function will be described as an example of the biological information measuring device.
<Embodiment 1>
The configuration of the wristwatch in the first embodiment will be described.
1 is a plan view of the wristwatch 100, FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1 when the wristwatch 100 is not worn on the wrist, and FIG. 3 is a case where the wristwatch 100 is worn on the wrist. It is II-II sectional drawing of FIG. FIG. 4 is an enlarged cross-sectional view of the device main body 1 of the wristwatch 100.
As shown in FIG. 1, the wristwatch 100 includes a device main body 1 that measures time and measures a pulse, a band 2 that attaches the device main body 1 to a wrist R, and the like.

  As shown in FIGS. 2 to 4, the apparatus main body 1 is provided with a case body 3 that is arranged on the outside and is formed in an annular shape. A liquid crystal display unit 5 for displaying time and pulse is provided below the watch glass 4 inside the case body 3, and a clock timing unit 6 connected to the liquid crystal display unit 5 is provided on the lower surface side of the liquid crystal display unit 5. Is provided. An operation key 7 for operating the wristwatch 100 is provided on the outer surface of the case body 3, and one end of the operation key 7 is provided so as to penetrate the case body 3 and reach the clock timing unit 6. Yes. That is, by pressing the operation key 7, a predetermined circuit in the clock timing unit 6 is connected, and an operation corresponding to this circuit is executed. A partition plate 8 that partitions the space in the case body 3 is provided below the clock timing unit 6. The partition plate 8 is formed from, for example, a stainless steel plate (SUS steel plate), and a support member 9 that supports the clock unit 6 is provided on the upper surface side of the partition plate 8. In addition, a pulse detection unit P as a biological information detection unit is provided on the lower surface side of the partition plate 8.

FIG. 5 is an enlarged cross-sectional view of the pulse detection unit P, and FIG. 6 is a cross-sectional view of the back cover unit 15.
As shown in FIG. 5, the pulse detector P is provided with a housing 10 for fixing the partition plate 8, and the partition plate 8 is fixed to the housing 10 with screws (not shown). The housing 10 is formed in a substantially disk shape, and a recess 10 a having a center is formed at a position slightly deviated from the center of the housing 10. Further, an opening 10b penetrating the lower surface side of the housing 10 is formed in a part of the bottom surface of the recess 10a. Further, a groove 10c is formed in an annular shape on the bottom surface of the recess 10a, and an O-ring 11 formed from elastic rubber or the like is provided in the groove 10c. A thin plate 12 is provided on the bottom surface of the recess 10a so as to cover substantially the entire bottom surface and the opening 10b. The thin plate 12 is formed from, for example, a stainless steel plate (SUS steel plate) and is formed thinner than the partition plate 8. On the upper surface of the thin plate 12 facing the opening 10b, a piezoelectric element 13 for detecting blood vessel pulsation near the wrist is attached. In addition, a spacer 14 is provided between the partition plate 8 and the thin plate 12 so as to create a space around the piezoelectric element 13. When the spacer 14 is pressed by the partition plate 8, the spacer 14 is thin. The plate 12 is pressed toward the groove 10c. Thereby, a pressing force acts on the O-ring 11 so that airtightness between the upper surface side and the lower surface side of the thin plate 12 is achieved. The spacer 14 is preferably formed from a hard material such as acrylonitrile butadiene styrene resin (ABS resin) so that the partition plate 8 does not bend easily.

A back cover portion 15 that shields the inside of the case body 3 is provided on the lower surface side of the housing 10.
The back cover portion 15 is provided at a position that comes into contact with the wrist R when the wristwatch 100 is worn, and is formed from a soft material that can be elastically deformed by the pulsation of a blood vessel near the wrist R at the time of wearing. Here, for example, urethane or silicon is preferably used as the soft material. The back cover portion 15 includes a fixing portion 15a that is pressed against the case body 3 by the pressing plate 16, and a protruding portion 15b that protrudes to the outside and contacts the wrist R when worn. The fixed portion 15 a is provided with a protruding portion 15 c that protrudes toward the case body 3 over the entire circumference of the back cover portion 15. And when the back cover part 15 is fixed to the case body 3, the protrusion part 15c and the recessed part 3a formed in the lower end side of the case body 3 engage, and it positions so that the back cover part 15 may not shift | deviate. It has become so.

As shown in FIG. 6, the fixed portion 15 a is formed with a first protrusion 15 d that protrudes toward the case body 3 on the inner side of the protrusion 15 c and contacts the case body 3. Further, a second protrusion 15e that protrudes toward the pressing plate 16 and contacts the pressing plate 16 is formed on the back side of the first protruding portion 15d. Further, the fixed portion 15 a is formed with a third protrusion 15 f that protrudes toward the case body 3 inside the first protrusion 15 d and contacts the housing 10.
Further, the overhanging portion 15b is formed to project downward so as to be separated from the housing 10, and an airtight space V is formed between the housing 9 and the overhanging portion 15b.

The pressing plate 16 is formed from a hard material such as a stainless steel plate (SUS steel plate), for example, and is pressed in such a manner that the fixing portion 15a of the back cover portion 15 is slightly deformed to the case body 3 side. These are attached to the case body 3 by screws (not shown).
At this time, the first projecting portion 15 d that contacts the case body 3 is deformed, so that airtightness between the case body 3 and the back cover portion 15 is achieved. Further, the second projecting portion 15e is deformed, so that airtightness between the pressing plate 16 and the back cover portion 15 is achieved. Furthermore, the third protrusion 15f is deformed, so that airtightness between the housing 9 and the back cover 15 is achieved. These first protrusion 15d, second protrusion 15e, and third protrusion 15f and the case body 3, the back cover 15 and the housing 10 are kept airtight.

  A hard plate 17 formed of a hard material such as a stainless steel plate (SUS steel plate) is bonded to the lower surface side of the overhanging portion 15b by vulcanization adhesion. The hard plate 17 has a role of causing the pulsation transmitted from the wrist R to equally act on the overhanging portion 15b.

As shown in FIGS. 1 to 4, the band 2 includes a first band 21 and a second band 22, and is connected to both ends facing each other across the center of the case body 3.
The first band 21 is provided at one end, and is provided adjacent to the sticking portion 21a for connecting the first band 21 to the case body 3 and wound around the wrist R. The main body 21c is provided.
The tacking portion 21a is formed from, for example, leather or urethane, and the tacking portion 21a is provided with a tacking bar 211a. The first band 21 can be connected to the case body 3 by inserting the stick 211a through holes formed at both ends of the case body 3.
The main body portion 21c is formed from, for example, genuine leather, synthetic leather, urethane, or the like, and a plurality of mounting holes 211c (see FIG. 1) are formed along the longitudinal direction.
In addition, a plurality of elastic members 2e as elastic parts that are elastic in the thickness direction of the main body part 21c are provided on the back side of the main body part 21c with appropriate intervals. The elastic member 2e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is attached to the back side of the main body portion 21c with an adhesive.

The second band 22 is provided at one end, and is provided adjacent to the attaching portion 22a for connecting the second band 22 to the case body 3 and wound around the wrist R. And a main body portion 22c.
The tacking portion 22a is formed from, for example, leather or urethane, and the tacking portion 22a is provided with a tacking rod 221a. The second band 22 can be connected to the case body 3 by inserting the stick 221 a through holes formed at both ends of the case body 3.
The main body portion 22c is formed of, for example, genuine leather, synthetic leather, urethane, or the like. At the end opposite to the end connected to the attaching portion 22a, a beautiful lock 221c and a mounting stick 222c are provided. Is provided.
A plurality of elastic members 2e are also provided on the back side of the main body 22c with an appropriate interval. The stretchable members 2e provided on the main body portion 21c of the first band 21 and the main body portion 22c of the second band 22 are preferably made of the same material and the same shape because there is a sense of unity. It is good also as a shape.

Next, an operation when the wristwatch 100 is worn on the wrist R will be described.
As shown in FIGS. 2 and 3, the first plate 21 and the second band 22 are wound around the wrist R by placing the hard plate 17 on the back side of the wrist R, and the tip of the first band 21 is wound. Is inserted into a beautiful tablet 221 c provided on the second band 22. By the operation at this time, a tensile force acts on the first band 21 and the second band 22, and the elastic member 2e in contact with the wrist R is compressed.
Thereafter, when the wearer releases his / her hands from the first band 21 and the second band 22, a restoring force acting to restore the original state acts on the stretchable parts 21 b and 22 b in a compressed state. Band 2 is tightened.

Next, the mechanism of pulse measurement by the wristwatch 100 will be described.
As shown in FIG. 3, when the wristwatch 100 is attached to the wrist R with the band 2 so that the device main body 1 of the wristwatch 100 is on the back side of the hand, it is orthogonal to the ulnar artery and radial artery flowing in the vicinity of the ulna S and radius T in the forearm. The band 2 will be arranged in the direction to be. Of the two bones on the forearm, the axial long bone on the little finger side is called the ulna, and the axial long bone on the thumb side is called the radius.

  Each artery repeats dilation and contraction due to pressure fluctuations in blood pumped from the heart in synchronization with the pulse. When the artery is expanded, a force is applied to the band 2 in the expanding direction with respect to the ulna S and the radius T, and when the artery is contracted, the force applied in the expanding direction is released and the force to return the band 2 is applied. . For this reason, when the tension acts on the band 2 and when it is released from the tension alternately. Since this tension fluctuation is transmitted to the pulse detector P via the band 2 and the case body 3, when the artery is expanded, the tension acting on the band 2 is transmitted to the pulse detector P, and the pulse detector P Is pressed against the wrist R.

  When the pulse detector P is pressed against the wrist R, the back cover 15 is elastically deformed to the inside of the case body 3 via the hard plate 17, and an airtight space formed between the back cover 15 and the housing 10. V is compressed. Then, the air pressure in the airtight space V rises, and this air pressure presses the thin plate 12. The pressed thin plate 12 is bent toward the concave portion 10a, and the piezoelectric element 13 is also bent along with this bending. And the voltage according to the magnitude | size of the bending of the piezoelectric element 13 generate | occur | produces in the piezoelectric element 13, This voltage is sent to the clock timing part 6 as an electrical signal, The clock timing part 6 calculates a pulse, It is displayed on the liquid crystal display unit 5.

According to the wristwatch 100 according to the first embodiment, when the apparatus main body 1 is attached to the wrist R by the band 2, a tensile force acts on the band 2 by the operation of the wearer, and the tensile force acts on the back side of the band 2. The expansion / contraction member 2e provided and in contact with the wrist R is compressed in the thickness direction, and the apparatus main body 1 is attached to the wrist R in a state where the expansion / contraction member 2e is compressed. When the wearer removes his / her hand from the band 2 after the apparatus main body 1 is mounted, the expansion / contraction member 2e in a compressed state is subjected to a restoring force to restore the original state, and the expansion / contraction member 2e has the original thickness. I want to go back. When the elastic member 2e attempts to return to the original thickness, the inner diameter of the band 2 becomes smaller, and the band 2 is tightened. Thus, even when the wearer loosely tightens the band 2, the apparatus main body 1 comes into close contact with the wrist R due to the additional tightening of the band 2.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

<Embodiment 2>
Next, a second embodiment of the wristwatch according to the present invention will be described with reference to FIGS. The watch 200 according to the second embodiment is different from the watch 100 according to the first embodiment in that the guide portion 28 is provided. Therefore, the guide portion 28 will be described, and the other components are denoted by the same reference numerals. Description is omitted.
7 is a cross-sectional view of the wristwatch 200 similar to the II-II cross-sectional view in FIG. 1, and FIG. 8 is a cross-sectional view showing a state in which the wristwatch 200 of FIG.

  As shown in FIGS. 7 and 8, the wristwatch 200 has a cover member 18 extending in the longitudinal direction of the first band 201 and the second band 202 at both ends facing each other with the center of the case body 3 interposed therebetween. Is provided. The cover member 18 is formed in a substantially cylindrical shape so as to surround the portions 21 a and 22 a attached to the first band 201 and the second band 202 and the base end portions of the main body portions 201 c and 202 c. Of the cover member 18, a guide portion 28 formed so as to extend along the main body portions 201c and 202c is provided on the back side of the base end portions of the main body portions 201c and 202c. The guide portion 28 has a role of regulating the bending direction of the main body portions 201c and 202c so that the main body portions 201c and 202c are not bent toward the wrist R side when the wristwatch 200 is attached to the wrist R.

According to the wristwatch 200 according to the second embodiment, when the apparatus main body 1 is attached to the wrist R by the band 2A, a tensile force acts on the band 2A by the operation of the wearer, and this tensile force causes the band 2A to move to the back side of the band 2A. The expansion / contraction member 2e provided as an expansion / contraction portion that contacts the wrist R is compressed in the thickness direction, and the apparatus main body 1 is attached to the wrist R in a state where the expansion / contraction member 2e is compressed. When the wearer removes his / her hand from the band 2A after the apparatus main body 1 is mounted, the elastic member 2e in a compressed state is subjected to a restoring force to restore the original state, and the elastic member 2e has the original thickness. I want to go back. When the elastic member 2e tries to return to the original thickness, the inner diameter of the band 2A becomes smaller, so the band 2A is tightened. Thereby, even when the wearer loosely tightens the band 2A, the apparatus main body 1 comes into close contact with the wrist R by the additional tightening of the band 2A.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

  Further, according to the wristwatch 200, when the apparatus main body 1 is attached to the wrist R by the band 2A, a tensile force acts on the band 2A by the operation of the wearer, and the band 2A is directed toward the inside of the wrist R by the tensile force. Although pulled, the guide portion 28 is provided on the back side of the band 2A, so the guide portion 28 restricts the movement of the band 2A to the inside of the wrist R. For this reason, the apparatus main body 1 is attached to the wrist R in a state where the band 2A extends away from the wrist R by the action of the guide portion 28. As a result, even when the wearer loosely tightens the band 2A, there is no gap between the band 2A and the wrist R by the amount that the band 2A is extended away from the wrist R. It becomes easy to contact R.

<Embodiment 3>
Next, a third embodiment of the wristwatch according to the present invention will be described with reference to FIGS. The watch 300 of the third embodiment is different from the watch 200 of the second embodiment in that the elastic member 2e is provided inside the band 2B. Therefore, the band 2B will be described, and the other components are denoted by the same reference numerals. The description is omitted.
9 is a cross-sectional view of a wrist watch 300 similar to the II-II cross-sectional view of FIG. 1, and FIG. 10 is a cross-sectional view showing a state where the wrist watch 300 of FIG.

As shown in FIGS. 9 and 10, the wristwatch 300 is provided with a band 2 </ b> B, which is composed of a first band 203 and a second band 204 and sandwiches the center of the case body 3. Are respectively connected to opposite ends.
The first band 203 is provided at one end, and is provided adjacent to the sticking portion 21a for connecting the first band 203 to the case body 3 and wound around the wrist R. The main body 203c is provided.
The tacking portion 21a is formed from, for example, leather or urethane, and the tacking portion 21a is provided with a tacking bar 211a. The first band 203 can be connected to the case body 3 by inserting the stick 211a through holes formed at both ends of the case body 3.

The main body 203c is formed from, for example, genuine leather, synthetic leather, urethane, or the like, and a plurality of mounting holes 211c (see FIG. 1) are formed along the longitudinal direction.
Further, of the main body portion 203c, a close contact portion 203d that is positioned on the side surface of the wrist R when the apparatus main body 1 is attached to the wrist R and is in close contact with the wrist R is formed thicker than other portions of the main body portion 203c. It is filled with an expansion / contraction member 2e as an expansion / contraction portion that can expand and contract in the thickness direction of the main body portion 203c. The elastic member 2e is formed of, for example, a material such as silicon, rubber, non-woven fabric, or sponge, and is filled in a tightly sealed state in the contact portion 203d.

The second band 204 is provided at one end, and is provided adjacent to the sticking portion 22a for connecting the second band 204 to the case body 3 and wound around the wrist R. The main body 204c is provided.
The tacking portion 22a is formed from, for example, leather or urethane, and the tacking portion 22a is provided with a tacking rod 221a. The second band 204 can be connected to the case body 3 by inserting the stick 221a through holes formed at both ends of the case body 3.

The main body 204c is made of, for example, genuine leather, synthetic leather, urethane, or the like. At the end opposite to the end connected to the attaching portion 22a, a beautiful lock 221c and a mounting stick 222c are provided. Is provided.
Of the main body portion 204c, a close contact portion 204d that is located on the side surface of the wrist R when the apparatus main body 1 is attached to the wrist R and is in close contact with the wrist R is formed thicker than other portions of the main body portion 204c. It is filled with an expansion / contraction member 2e as an expansion / contraction portion that can expand and contract in the thickness direction of the main body portion 204c. The elastic member 2e is made of, for example, a material such as silicon, rubber, non-woven fabric, or sponge, and is filled in a tightly sealed state in the contact portion 204d.

According to the wristwatch 300 in the third embodiment, when the apparatus main body 1 is attached to the wrist R by the band 2B, a tensile force acts on the band 2B by the operation of the wearer, and the tensile force is provided inside the band 2B. The main body 1 is attached to the wrist R in a state where the stretchable member 2e is compressed in the thickness direction and the stretchable member 2e is compressed. When the wearer removes his / her hand from the band 2B after the apparatus main body 1 is mounted, the elastic member 2e in a compressed state is subjected to a restoring force to restore the original state, and the elastic member 2e has the original thickness. I want to go back. When the elastic member 2e attempts to return to the original thickness, the inner diameter of the band 2B becomes smaller, and the band 2B is tightened. Thereby, even when the wearer loosely tightens the band 2B, the apparatus main body 1 comes into close contact with the wrist R by the additional tightening of the band 2B.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

<Embodiment 4>
Next, a fourth embodiment of the wristwatch according to the present invention will be described with reference to FIGS. The watch 400 of the fourth embodiment is different from the watch 300 of the third embodiment in that the stretchable member 2e as the stretchable portion is provided over the entire area inside the band 2C. Constituent elements are denoted by the same reference numerals and description thereof is omitted.
11 is a cross-sectional view of a wrist watch 400 similar to the II-II cross-sectional view of FIG. 1, and FIG. 12 is a cross-sectional view showing a state where the wrist watch 400 of FIG.

As shown in FIGS. 11 and 12, the wristwatch 400 is provided with a band 2 </ b> C, which is composed of a first band 205 and a second band 206 and sandwiches the center of the case body 3. Are respectively connected to opposite ends.
The first band 205 is provided at one end and is provided adjacent to the attachment portion 21a for connecting the first band 205 to the case body 3 and the attachment portion 21a. And a main body 205c.
The tacking portion 21a is formed from, for example, leather or urethane, and the tacking portion 21a is provided with a tacking bar 211a. The first band 205 can be connected to the case body 3 by inserting the stick 211a through holes formed at both ends of the case body 3.

The main body portion 205c is formed from, for example, genuine leather, synthetic leather, urethane, or the like, and a plurality of mounting holes 211c (see FIG. 1) are formed along the longitudinal direction.
In addition, the entire interior of the main body 205c is filled with an expansion / contraction member 2e that can expand and contract in the thickness direction of the main body 205c. The elastic member 2e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is filled in a sealed state in the main body 205c.

The second band 206 is provided at one end portion, and is provided adjacent to the attachment portion 22a for connecting the second band 206 to the case body 3 and wound around the wrist R. Main body 206c.
The tacking portion 22a is formed from, for example, leather or urethane, and the tacking portion 22a is provided with a tacking rod 221a. The second band 206 can be connected to the case body 3 by inserting the stick 221a through the holes formed at both ends of the case body 3.

The main body portion 206c is formed of, for example, genuine leather, synthetic leather, urethane, or the like. At the end opposite to the end connected to the attaching portion 22a, a beautiful lock 221c and a mounting stick 222c are provided. Is provided.
Further, the entire interior of the main body portion 206c is filled with an expansion / contraction member 2e that can expand and contract in the thickness direction of the main body portion 206c. The elastic member 2e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is filled in a sealed state in the main body portion 206c.

According to the wristwatch 400 according to the fourth embodiment, when the apparatus main body 1 is attached to the wrist R by the band 2C, a tensile force acts on the band 2C by the operation of the wearer, and this tensile force covers the entire area inside the band 2C. The provided expansion / contraction member 2e is compressed in the thickness direction, and the apparatus main body 1 is attached to the wrist R in a state where the expansion / contraction member 2e is compressed. When the wearer removes his / her hand from the band 2C after the apparatus main body 1 is mounted, the elastic member 2e in a compressed state is subjected to a restoring force to restore the original state, and the elastic member 2e has the original thickness. I want to go back. When the elastic member 2e tries to return to the original thickness, the inner diameter of the band 2C becomes smaller, so that the band 2C is tightened. Thereby, even if the wearer tightens the band 2C loosely, the apparatus main body 1 comes into close contact with the wrist R by the additional tightening of the band 2C.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

<Embodiment 5>
Next, a fifth embodiment of the wristwatch according to the present invention will be described with reference to FIGS. The difference between the wristwatch 500 of the fifth embodiment and the wristwatch 300 of the embodiment is the structure of the band 2D. Therefore, the band 2D will be described, and the other components will be denoted by the same reference numerals and the description thereof will be omitted.
13 is a cross-sectional view of a wrist watch 500 similar to the II-II cross-sectional view of FIG. 1, and FIG. 14 is a cross-sectional view showing a state where the wrist watch 500 of FIG.

As shown in FIGS. 13 and 14, the wristwatch 500 is provided with a band 2D, which is composed of a first band 207 and a second band 208 and sandwiches the center of the case body 3. Are respectively connected to opposite ends.
The first band 207 is provided with a fixing portion 207m whose one end is connected to the case body 3, and a deforming portion 207n which is connected to the other end of the fixing portion 207m and is wound around the wrist R.
The fixing portion 207m is formed of a hard material that is not deformed by an action force from the wrist R, such as metal or acrylonitrile butadiene styrene resin (ABS resin). In addition, on the back surface side of the fixed portion 207m, a first expansion / contraction member 21e is provided as a first expansion / contraction portion that can expand and contract in the thickness direction of the fixed portion 207m. The first elastic member 21e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is attached to the back surface side of the fixing portion 207m with an adhesive.
The deforming portion 207n is formed from, for example, a leather, synthetic leather, urethane, or the like, and a plurality of mounting holes (not shown) are formed along the longitudinal direction. In addition, the entire interior of the deformable portion 207n is filled with a second elastic member 22e as a second expandable portion that can expand and contract in the thickness direction of the deformable portion 207n. The second elastic member 22e is formed of, for example, a material such as silicon, rubber, non-woven fabric, or sponge, and is filled in the deformed portion 207n in a sealed state.

The second band 208 is provided with a fixing portion 208m having one end connected to the case body 3 and a deforming portion 208n connected to the other end of the fixing portion 208m and wound around the wrist R.
The fixing portion 208m is formed of a hard material that is not deformed by an action force from the wrist R, such as metal or acrylonitrile butadiene styrene resin (ABS resin). In addition, on the back surface side of the fixed portion 208m, a first extendable member 21e is provided as a first extendable portion that is extendable in the thickness direction of the fixed portion 208m. The first elastic member 21e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is attached to the back surface side of the fixing portion 208m with an adhesive.
The deformed portion 208n is formed from, for example, genuine leather, synthetic leather, urethane, or the like, and a plurality of mounting holes (not shown) are formed along the longitudinal direction. Further, the entire interior of the deformable portion 208n is filled with a second stretchable member 22e as a second stretchable portion that is stretchable in the thickness direction of the deformable portion 208n. For example, the second elastic member 22e is formed of a material such as silicon, rubber, non-woven fabric, or sponge, and is filled in the deformed portion 208n in a sealed state. In addition, a beautiful lock 221c and a mounting bar 222c are provided at the end opposite to the end connected to the case body 3.

According to the wristwatch 500 according to the fifth embodiment, when the apparatus main body 1 is attached to the wrist R using the band 2D, a tensile force acts on the band 2D by the operation of the wearer, and the tensile force causes the band 2D to move to the back side of the band 2D. The device 1 is mounted on the wrist R in a state where the first elastic member 21e provided and in contact with the wrist R is compressed in the thickness direction, and the first elastic member 21e is compressed. When the wearer removes his / her hand from the band 2D after the apparatus main body 1 is mounted, the first expansion / contraction member 21e in a compressed state is subjected to a restoring force to restore the original state, and the first expansion / contraction is performed. The member 21e tries to return to the original thickness. When the first elastic member 21e attempts to return to the original thickness, the inner diameter of the band 2D becomes smaller, and the band 2D is tightened.
In addition, the second elastic member 22e provided inside the band 2D is compressed in the thickness direction by the tensile force acting on the band 2D, and the apparatus main body 1 is connected to the wrist R while the second elastic member 22e is compressed. It is attached to. When the wearer removes his / her hand from the band 2D after the apparatus main body 1 is mounted, the second expansion / contraction member 22e in the compressed state is subjected to a restoring force to restore the original state, and the second expansion / contraction is performed. The member 22e tries to return to the original thickness. When the second elastic member 22e attempts to return to the original thickness, the inner diameter of the band 2D becomes smaller, and the band 2D is tightened.
As a result, even when the wearer loosely tightens the band 2D, the apparatus main body 1 comes into close contact with the wrist R by tightening the band 2D.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

<Embodiment 6>
Next, a sixth embodiment of the wristwatch according to the present invention will be described with reference to FIGS. 15 and 16. The difference between the wristwatch 600 of the sixth embodiment and the wristwatch 400 of the fourth embodiment is that a fiber material is used as the elastic member 2e. Therefore, the band 2E will be described, and the other components are denoted by the same reference numerals. Therefore, the description is omitted.
15 is a cross-sectional view of a wrist watch 600 similar to the II-II cross-sectional view of FIG. 1, and FIG. 16 is a cross-sectional view showing a state where the wrist watch 600 of FIG.

As shown in FIGS. 15 and 16, the wristwatch 600 is provided with a band 2 </ b> E, which is composed of a first band 209 and a second band 210 and sandwiches the center of the case body 3. Are respectively connected to opposite ends.
The first band 209 is provided at one end portion, and is provided adjacent to the attachment portion 21a for connecting the first band 209 to the case body 3 and wound around the wrist R. The main body 209c is provided.
The tacking portion 21a is formed from, for example, leather or urethane, and the tacking portion 21a is provided with a tacking bar 211a. The first band 209 can be connected to the case body 3 by inserting the stick 211a through holes formed at both ends of the case body 3.

The main body portion 209c is formed from, for example, a leather of synthetic leather or synthetic leather, and a plurality of mounting holes 211c (see FIG. 1) are formed along the longitudinal direction.
In addition, the entire interior of the main body 209c is filled with an expansion / contraction member 2e as an expansion / contraction section that can expand and contract in the thickness direction of the main body 209c. The elastic member 2e is formed of, for example, a fiber material having elasticity, and is filled in a sealed state in the main body portion 209c.

The second band 22 is provided at one end, and is provided adjacent to the attaching portion 22a for connecting the second band 210 to the case body 3 and wound around the wrist R. And a main body portion 22c.
The tacking portion 22a is formed from, for example, leather or urethane, and the tacking portion 22a is provided with a tacking rod 221a. The second band 210 can be connected to the case body 3 by inserting the stick 221a through holes formed at both ends of the case body 3.

The main body 210c is formed from, for example, leather of leather or synthetic leather, and a beauty lock 221c and a mounting stick 222c are provided on the end opposite to the end connected to the attachment 22a. Yes.
The entire interior of the main body 210c is filled with an expansion / contraction member 2e that can expand and contract in the thickness direction of the main body 210c. The elastic member 2e is formed of, for example, a fiber material and filled in a sealed state in the main body 210c.

  According to the wristwatch 600 in the sixth embodiment, the weight of the band 2E can be reduced by using a fiber material as the elastic member 2e having elasticity.

<Embodiment 7>
Next, a seventh embodiment of the wristwatch according to the present invention will be described with reference to FIGS. The difference between the wristwatch 700 of the seventh embodiment and the wristwatch 100 of the first embodiment is that a stretchable member 2e as a stretchable portion is provided on the band 2F composed of a plurality of metal pieces 25 and 26. Explanation will be given, and the other components will be given the same reference numerals and description thereof will be omitted.
17 is a cross-sectional view of a wrist watch 700 similar to the II-II cross-sectional view of FIG. 1, and FIG. 18 is a cross-sectional view showing a state where the wrist watch 700 of FIG.

As shown in FIGS. 17 and 18, the wristwatch 700 is provided with a band 2 </ b> F, which is composed of a first band 250 and a second band 260 and sandwiches the center of the case body 3. Are respectively connected to opposite ends.
The first band 250 is configured by connecting a plurality of metal pieces 25. One end of the first band 250 is connected to the case body 3 by a hinge member 25a, and the other end of the first band 250 makes the length of the band 2F constant when the wrist of the apparatus main body 1 is worn. It is connected by a hinge member 25b to one end of a band fixing portion 29 that is fixed so as to be held. The band fixing part 29 is connected so that a plurality of plate members can rotate with each other. The band fixing part 29 holds the band 2F at a certain length by folding and attaches the apparatus main body 1 to the wrist R. The metal pieces 25 are connected to each other by a hinge member 25c.
In addition, on the back side of each metal piece 25, an elastic member 2e is provided as an elastic part that can be extended and contracted in the thickness direction of the metal piece 25. The elastic member 2e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is attached to the back surface side of the metal piece 25 with an adhesive.

The second band 260 is configured by connecting a plurality of metal pieces 26. One end of the second band 260 is connected to the case body 3 by a hinge member 26a, and the other end of the second band 260 has a constant length of the band 2F when the wrist of the apparatus main body 1 is worn. The other end portion of the band fixing portion 29 that is fixed so as to be held is connected by a hinge member 26b. The metal pieces 26 are connected to each other by a hinge member 26c.
In addition, on the back side of each metal piece 26, an expansion / contraction member 2 e is provided as an expansion / contraction part that can expand and contract in the thickness direction of the metal piece 26. The elastic member 2e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is attached to the back side of the metal piece 26 with an adhesive.

According to the wristwatch 700 in the seventh embodiment, when the apparatus main body 1 is attached to the wrist R by the band 2F, a tensile force acts on the band 2F by the operation of the wearer, and the metal constituting the band 2F by this tensile force. The expansion / contraction member 2e provided on the back side of the pieces 25 and 26 and contacting the wrist R is compressed in the thickness direction, and the apparatus main body 1 is attached to the wrist R in a state where the expansion / contraction member 2e is compressed. When the wearer removes his / her hand from the band 2F after the apparatus main body 1 is mounted, the elastic member 2e in a compressed state is subjected to a restoring force to restore the original state, and the elastic member 2e has the original thickness. I want to go back. When the elastic member 2e tries to return to the original thickness, the inner diameter of the band 2F becomes smaller, so that the band 2F is tightened. Thus, even when the wearer loosely tightens the band 2F, the apparatus main body 1 comes into close contact with the wrist R by the additional tightening of the band 2F.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

<Eighth embodiment>
Next, an eighth embodiment of the wristwatch according to the present invention will be described with reference to FIGS. 19 and 20. The wristwatch 800 of the eighth embodiment is different from the wristwatch 700 of the seventh embodiment in that the elastic member 2e as an elastic part is provided in the band fixing part 29. Therefore, the band 2G will be described and other components Are denoted by the same reference numerals and description thereof is omitted.
19 is a cross-sectional view of a wrist watch 800 similar to the II-II cross-sectional view of FIG. 1, and FIG. 20 is a cross-sectional view showing a state where the wrist watch 800 of FIG.

As shown in FIGS. 19 and 20, the wristwatch 800 is provided with a band 2 </ b> G. The band 2 </ b> G includes a first band 270 and a second band 280 and sandwiches the center of the case body 3. Are respectively connected to opposite ends.
The first band 270 is configured by connecting a plurality of metal pieces 25. One end of the first band 270 is connected to the case body 3 by a hinge member 25a, and the other end of the first band 270 makes the length of the band 2G constant when the wrist of the apparatus main body 1 is worn. It is connected by a hinge member 25b to one end of a band fixing portion 29 that is fixed so as to be held. The band fixing part 29 is connected so that a plurality of plate members can rotate with each other. The band fixing part 29 holds the band 2G at a certain length by folding and attaches the apparatus main body 1 to the wrist R. The metal pieces 25 are connected to each other by a hinge member 25c.

  The second band 280 is configured by connecting a plurality of metal pieces 26. One end of the second band 280 is connected to the case body 3 by the hinge member 26a, and the other end of the second band 280 makes the length of the band 2G constant when the wrist of the apparatus main body 1 is worn. The other end portion of the band fixing portion 29 that is fixed so as to be held is connected by a hinge member 26b. The metal pieces 26 are connected to each other by a hinge member 26c.

  Here, in the band fixing part 29, when the band 2G is fixed to the wrist R by the band fixing part 29, the band fixing part 29 comes into contact with the back side of the wrist R so that the band fixing part 29 can expand and contract in the thickness direction. An elastic member 2e is provided as a part. The elastic member 2e is formed of, for example, a material such as silicon, rubber, nonwoven fabric, or sponge, and is attached to a position on the back side of the band fixing portion 29 with an adhesive.

According to the wristwatch 800 in the eighth embodiment, when the apparatus main body 1 is attached to the wrist R by the band 2G, a tensile force acts on the band 2G by the operation of the wearer, and the back surface of the band fixing portion 29 is caused by this tensile force. The expansion / contraction member 2e provided on the side and in contact with the wrist R is compressed in the thickness direction, and the apparatus main body 1 is attached to the wrist R in a state where the expansion / contraction member 2e is compressed. When the wearer removes his / her hand from the band 2G after the apparatus main body 1 is mounted, the elastic member 2e in a compressed state is subjected to a restoring force to restore the original state, and the elastic member 2e has the original thickness. I want to go back. When the elastic member 2e tries to return to the original thickness, the inner diameter of the band 2G becomes small, and the band 2G is tightened. Thereby, even when the wearer loosely tightens the band 2G, the apparatus main body 1 comes into close contact with the wrist R by the additional tightening of the band 2G.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

<Ninth Embodiment>
Next, a ninth embodiment of the wristwatch according to the present invention will be described with reference to FIGS. The watch 900 of the ninth embodiment is different from the watch 700 of the seventh embodiment in that a plurality of metal pieces 25 and 26 constituting the band 2H are connected by expansion / contraction pieces 27 and 37. Explanation will be given, and the other components will be given the same reference numerals and description thereof will be omitted.
21 is a cross-sectional view of a wrist watch 900 similar to the II-II cross-sectional view of FIG. 1, and FIG. 22 is a cross-sectional view showing a state where the wrist watch 900 of FIG.

As shown in FIGS. 21 and 22, the wristwatch 900 is provided with a band 2 </ b> H, which is composed of a first band 291 and a second band 292, and sandwiches the center of the case body 3. Are respectively connected to opposite ends.
The first band 291 is configured by connecting a plurality of metal pieces 25. One end of the first band 291 is connected to the case body 3 by a hinge member 25a, and the other end of the first band 291 makes the length of the band 2H constant when the wrist of the apparatus main body 1 is worn. It is connected by a hinge member 25b to one end of a band fixing portion 29 that is fixed so as to be held. The band fixing part 29 is connected so that a plurality of plate members can rotate with each other. The band fixing part 29 holds the band 2H at a certain length by folding and attaches the apparatus main body 1 to the wrist R.
In addition, between each metal piece 25, there is provided an extendable piece 27 that is extendable in the thickness direction of the band 2H, and the metal piece 25 and the extendable piece 27 are connected by a hinge member 27c. That is, the telescopic piece 27 also functions as a connecting member that connects the metal pieces 25 together. Here, the telescopic piece 27 is formed of a material such as silicon, rubber, non-woven fabric, or sponge.
A protrusion 27 d is formed on the back surface of the expansion / contraction piece 27 so as to protrude to the wrist R side from the back surface of the metal piece 25 while being connected to the metal piece 25. A gap portion 27e is formed as a cushion when is applied.

The second band 292 is configured by connecting a plurality of metal pieces 26. One end of the second band 292 is connected to the case body 3 by a hinge member 26a, and the other end of the second band 292 makes the length of the band 2H constant when the wrist of the apparatus main body 1 is worn. The other end portion of the band fixing portion 29 that is fixed so as to be held is connected by a hinge member 26b.
In addition, between each metal piece 26, an expansion / contraction piece 37 that is extendable and contractible in the thickness direction of the band 2H is provided, and the metal piece 26 and the expansion / contraction piece 37 are connected by a hinge member 37c. That is, the telescopic piece 37 also functions as a connecting member that connects the metal pieces 26 to each other. Here, the expansion / contraction piece 37 is formed of a material such as silicon, rubber, nonwoven fabric, or sponge.
A projecting portion 37 d is formed on the back surface of the telescopic piece 37 so as to project to the wrist R side from the back surface of the metal piece 26 while being connected to the metal piece 26. A gap portion 37e is formed as a cushion when is applied.

  According to the wristwatch 900 in the ninth embodiment, the hard plate 17 is applied to the back side of the wrist R, the first band 21 and the second band 22 are wound along the wrist R, and the band fixing portion 29 is folded. It fixes so that the length of the band 2H may be kept constant. Here, as shown in FIG. 22, when the band 2H is wound loosely around the wrist R, a gap is formed between the back surface of the metal pieces 25, 26 constituting the band 2H and the wrist R. . However, since the telescopic pieces 27 and 37 are connected between the metal pieces 25 and 26, the protrusions 27d and 37d of the telescopic pieces 27 and 37 are connected to the wrist R even if the metal pieces 25 and 26 do not contact the wrist R. To touch. When the projecting portions 27d and 37d come into contact with the wrist R, the projecting portions 27d and 37d are pushed up to the outside of the wrist R. However, since the void portions 27e and 37e are formed inside the telescopic pieces 27 and 37, the projecting portions 27d and 37d act on the projecting portions 27d and 37d. The force to be released is released by the gap portions 27e and 37e serving as cushions. Thereby, the apparatus main body 1 is securely attached to the wrist R without pushing only the telescopic pieces 27 and 37 to the outside of the wrist R.

Further, a tensile force is applied to the band 2H by the operation of the wearer, and the expansion / contraction pieces 27 and 37 which are provided between the metal pieces 25 and 26 constituting the band 2H and come into contact with the wrist R by the tensile force are provided in the thickness direction. The apparatus main body 1 is attached to the wrist R in a state where the telescopic pieces 27 and 37 are compressed. When the wearer removes his / her hand from the band 2H after the apparatus main body 1 is mounted, the expansion / contraction pieces 27 and 37 in a compressed state are subjected to a restoring force to restore the original state, and the expansion / contraction pieces 27 and 37 are restored. Tries to return to its original thickness. Since the inner diameter of the band 2H is reduced when the telescopic pieces 27 and 37 return to the original thickness, the band 2H is tightened. Thus, even when the wearer loosely tightens the band 2H, the apparatus main body 1 comes into close contact with the wrist R by the additional tightening of the band 2H.
Therefore, regardless of the degree of tightening of the apparatus main body 1 to the wrist R by the wearer, the apparatus main body 1 can be brought into close contact with the wrist R, and the pulse can be reliably detected.

The wristwatch according to the present invention is not limited to the above embodiment. For example, the elastic member is not necessarily provided in both the first band and the second band, and may be provided in any one of the bands. Further, the elastic member is not limited to one that expands and contracts only in the thickness direction of the band, and may be one that can expand and contract in the longitudinal direction of the band. Moreover, the material which comprises a band, the attachment position of an expansion-contraction member, etc. can be combined or changed freely.
Further, the guide portion may be provided as a member separate from the cover member. Further, the shape and number of the metal pieces and the expansion / contraction pieces are also arbitrary, and it is needless to say that specific detailed structures and the like can be appropriately changed.

1 Device body 2, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H bands 21, 201, 203, 205, 207, 209, 250, 270, 291 First bands 22, 202, 204, 206, 208, 210, 260, 280, 292 Second band 2e Stretchable member (stretchable part)
21e Elastic member (first elastic part)
22e Elastic member (second elastic part)
25 metal piece 26 metal piece 27 telescopic piece 28 guide part 29 band fixing part 37 telescopic piece 100,200,300,400,500,600,700,800,900 wristwatch (biological information measuring device)
P Pulse detector (biological information detector)
R wrist

Claims (1)

A biological information detector that detects biological information based on the pulsation of an artery near the wrist;
A band for attaching the apparatus main body having the biological information detection unit to the wrist;
A first stretchable portion provided on the back side of the band and stretchable in the thickness direction of the band;
A second stretchable part provided inside the band and stretchable in the thickness direction of the band;
The biological information measuring device, wherein the first elastic part and the second elastic part are made of an elastic fiber material .

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