JPH0451772Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention is a pulse wave detection device that detects the pressure pulse wave of a living body by pressing a pulse wave sensor against the artery of that living body. The present invention relates to a protection device for protecting a pulse wave sensor when it is not worn.

Conventional technology and its problems For example, by wrapping a band around a part of a living body such as the wrist, a housing to which the band is attached is placed over the living body's artery, and pulse waves stored in the housing are detected. A pulse wave detection device has been provided which detects a pressure pulse wave generated within an artery by pressing a sensor directly above the artery with an appropriate pressing force.

In such conventional pulse wave detection devices, the housing is generally opened on the side that presses the living body, and when the device is attached and pulse wave detection is started, the pressing surface of the pulse wave sensor is on the surface of the living body. We're starting to come into contact. For this reason, in conventional devices, when the device is removed from the living body, some kind of impact may be applied to the pressing surface of the pulse wave sensor through the opening of the housing, or damage may be caused. .

Means for Solving the Problems The present invention has been made against the background of the above-mentioned circumstances with the purpose of providing a device for protecting a pulse wave sensor when the pulse wave detection device is not worn. The gist is that in a pulse wave detection device of the type that detects the pressure pulse wave of a living body by pressing the pulse wave sensor on the artery of the living body, (a) a housing that houses the pulse wave sensor; ,
(b) a pair of bands relatively rotatably attached to an end of the housing for attaching the housing to the part of the living body; and (c) at least one of the pair of bands is connected to the housing. and a biasing means that constantly biases the opening in the direction of closing the opening.

Operation and Effect of the Invention By doing this, at least one of the pair of bands attached to the end of the housing can
Since the biasing means is constantly biased in the direction of closing the opening of the housing, when the device is not attached to a living body, the opening of the housing is closed by at least one band. Therefore, according to the present invention, since the pulse wave sensor is protected by at least one of the pair of bands even when the device is not worn, damage to the pulse wave sensor can be suitably prevented. It will be done.

Embodiments Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 1 is a diagram showing a pulse wave detection device employing the protection device of this embodiment. The housing 10 is
The housing 10 is made of a relatively rigid material such as metal, and a pulse wave sensor 1 is disposed within the housing 10.
2 is accommodated. The pulse wave sensor 12 is equipped with a semiconductor piezoelectric element constructed on a relatively fragile semiconductor chip on its pressing surface, and when not measuring,
It is supported within the housing 10 by a diaphragm 14 at a position slightly away from the contact surface with the living body. The annular rubber diaphragm 14 has its peripheral edges fixed to partition plates 16 and 18 fixed to the inner wall surface of the housing 10, so that
An airtight pressure chamber 20 is formed within the housing 10. Pressure gas is supplied into the pressure chamber 20 from a pressure gas supply source (not shown) through the communication hole 22 and piping 24.
When pressure is supplied inside, the diaphragm 14 expands and the pulse wave sensor 12 moves into the housing 1.
It is pressed toward the surface of the living body through an opening formed in the bottom surface of the body.

Mounting parts 26 and 28 are formed at both lower ends of the housing 10, and two pairs of links 30 and 32 are attached to the mounting parts 26 and 28, respectively, as shown in FIGS. 2 and 3. and 3
4 and 36 are rotatably attached to the housing 10 by four pins 38, 40, 42, and 43, respectively. Of these four links 30, 32, 34, and 36, the link 30 is attached to the mounting portion 2 as shown in FIG. 2 (right side view in FIG. 1).
A spring 46 housed in a notch 44 at one end of the link 6 biases the opposite link 34, 36 in the direction of rotation. That is, the spring 46 is wound around the pin 38, and has one end 46a in contact with a protrusion 48 formed on the outer peripheral surface of the link 30, and the other end 46b in contact with the surface of the mounting portion 26 of the housing 10. The link 30 is always urged with a relatively strong urging force in the direction shown by the arrow in FIG. 1, that is, in the direction toward the opening of the housing 10.

Links 30 and 32 and links 34 and 36 are connected to bands 54 and 5 by connecting shafts 50 and 52.
6 are connected to each other at one end. band 5
4 and 56 are made of a relatively rigid material, such as hard cloth or plastic stick, and are designed to rotate integrally with the connecting shafts 50 and 52, respectively, unless relative rotation is actively applied. It's getting old. Note that while the length of the band 54 is set to approximately correspond to the opening of the housing 10, the band 56 is made longer than the band 54 to some extent, and the outer periphery of each other end of the bands 54 and 56 is made longer than the band 54. A pair of fasteners 58 and 60 attached at corresponding positions on the surface and the inner circumferential surface are bonded to each other, so that they can be wrapped around a living body's wrist or the like. A protective member 62 made of sponge or the like is fixed to the inner peripheral surface of the band 54 at a position corresponding to the surface of the pulse wave sensor 12 when the band 54 is in a position to close the opening of the housing 10. has been done. A recess 64 is formed in the center of the protective member 62 to correspond to the pressing surface of the pulse wave sensor 12 .

When detecting pulse waves in the arteries of a living body using the pulse wave detection device configured as described above, the bands 54 and 56 are wound around the wrists of the living body, the housing 10 is attached, and the pulse wave sensor is attached. 12 is positioned directly above the radial artery, etc., pressure is supplied from the pressure gas supply source to the pressure chamber 20, and the pulse wave sensor 12 is pressed against the artery with an appropriate pressing force, thereby causing pressure inside the artery. The pressure pulse wave is detected by the pulse wave sensor 12. When the device is removed from the living body after such pulse wave detection is completed, the link 30 and band 54 are urged toward the opening of the housing 10 by the action of the spring 46, as shown by the broken line in FIG. , the link 30 is connected to the housing 10
Since the opening of the housing 10 is closed by the band 54, the surface of the pulse wave sensor 12 is protected by the protection member 62 at a slight predetermined distance apart. Therefore, in this embodiment, the spring 46 functions as a biasing means.

As mentioned above, according to the protection device of this embodiment,
When the pulse wave detection device is removed from the living body, the band 54 is biased by the spring 46 to close the opening of the housing 10 and the pulse wave sensor 1
Since the surface of the pulse wave sensor 12 is protected, the pulse wave sensor 12 is suitably prevented from being damaged when the device is not worn.

Although one embodiment of the present invention has been described above based on the drawings, the present invention can be suitably implemented in other embodiments as well.

For example, in the above-mentioned embodiment, the opening of the housing 10 was closed by only one band 54, but by providing a biasing means on the other band 56, the opening of the housing 10 is closed. They may be protected in layers. This has the advantage that the pulse wave sensor 12 can be protected from even greater impact.

Further, the material of the protective member 62 is not particularly limited to sponge, as long as it can suitably absorb external impact and will not cause damage even if the surface of the pulse wave sensor 12 comes into contact with it. . Further, the protection member 62 does not need to be provided.

The above-mentioned embodiment is merely an embodiment of the present invention, and the present invention may be modified without departing from its spirit.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway front view showing a pulse wave detection device employing a protection device according to an embodiment of the present invention. FIG. 2 is a diagram showing the link and band surroundings when FIG. 1 is viewed from the right side. Figure 3 is the first
It is a figure which shows the link and band vicinity when the figure was seen from the left side. 10...Housing, 12...Pulse wave sensor, 4
6... Spring (biasing means), 54, 56... Band.

Claims (1)

[Claims for Utility Model Registration] A pulse wave detection device that detects a pressure pulse wave of a living body by pressing the pulse wave sensor on an artery of the living body, comprising: a housing that accommodates the pulse wave sensor; a pair of bands relatively rotatably attached to an end of the housing in order to attach the housing to the part of the living body; and at least one of the pair of bands in a direction that closes the opening of the housing. A protection device for a pulse wave detection device, comprising: a biasing means that constantly biases the pulse wave detection device toward the target.