HK1128521B - Weighing scale - Google Patents

Description

Weighing machine

Technical Field

The present invention relates to a weighing machine for measuring body weight.

Background

Conventionally, a weighing scale for measuring a body weight of a person has been known. For example, a health management policy advising apparatus having a weight scale capable of measuring the weight of a person is proposed. The weight scale of the health management guideline advising apparatus includes a scale body having a tread base (top cover) having a flat substantially rectangular parallelepiped shape along an installation surface, a weight sensor provided below the scale body, the weight sensor being disposed at 4 positions below each of left rear portion, right rear portion, left front portion and right front portion of the scale body (tread base), the left rear portion sensor and the left front portion sensor being disposed at substantially the same distance from a left-right center line of the tread base, the right rear portion sensor and the right front portion sensor being disposed at substantially the same distance from the left-right center line of the tread base, and a weight sensor for detecting a load (body weight) if a measurer is placed on the tread base of the scale body to apply the load to the tread base (see patent document 1 and fig. 12).

[ patent document 1 ] Japanese patent laid-open No. 2003-220048

However, when the body weight sensor is disposed such that the distance from each of the left and right center lines is substantially the same between the left and right rear sensors and between the right and right rear sensors, the following problems arise.

That is, the width of the front part of the foot (the part of the foot substantially in front of the center of the foot) of a typical person is wider than the width of the heel part of the rear part of the foot. Therefore, for example, if the respective heel portions of the left foot and the right foot are aligned with substantially upper positions of the weight sensors of the left rear portion and the right rear portion, and the left and right feet are placed on the tread platform in the front-rear direction so that the distances between the front portions of the left and right feet and the distances between the heel portions are substantially the same, the center portion of the front portion of the left foot is offset to the left by a predetermined distance from the position of the weight sensor of the left front portion, and the center portion of the front portion of the right foot is offset to the right by a predetermined distance from the position of the weight sensor of the right front portion. As a result, it is difficult for the weight sensor to directly receive the load applied from the left and right feet, and it is often difficult for the weight sensor to accurately detect the load.

In addition, in the case of the standing posture, there are many persons who have the front portions of the left and right feet at a distance greater than the distance between the heel portions, and it is inconvenient for such persons to have to consciously and awkwardly place the feet on the stepping deck with the front portions of the left and right feet aligned to the distance between the heel portions. On the other hand, if such a person freely steps on the stepping deck to take a normal upright posture during measurement, the center of the front portion of each of the left and right feet is more likely to be displaced from the position of the weight sensor.

Disclosure of Invention

The invention provides a weighing scale which can easily detect the load of a weight sensor at the heel part of a foot and the central part of the front part of the foot and can easily and accurately detect the load.

In order to solve the above-mentioned problems, the invention according to claim 1 provides a weight scale in which a weight of a person to be measured is measured by placing the person on a stepping deck provided on a scale body in a state of being installed on an installation surface such as a floor surface and by detecting a load acting on the stepping deck by weight sensors provided on a plurality of legs projecting downward from the scale body, the weight scale being characterized in that the legs include a 1 st leg portion disposed below a left rear portion of the stepping deck, a 2 nd leg portion disposed below a right rear portion of the stepping deck, a 3 rd leg portion disposed below a left front portion of the stepping deck, and a 4 th leg portion disposed below a right front portion of the stepping deck; each of the leg portions has a mounting surface contact portion that contacts the mounting surface on a lower side of the body weight sensor; the installation surface contact portion of the 1 st leg portion is configured to be shorter in distance from a left-right center line of the stepping table than the installation surface contact portion of the 3 rd leg portion; the installation surface contact portion of the 2 nd leg portion is configured to be shorter in distance from the left and right center lines than the installation surface contact portion of the 4 th leg portion; on the upper surface of the stepping table, a left heel placing clear indication part for clearly indicating the position of the heel of the left foot of the measurer is arranged at the position approximately above the installation surface contact part of the 1 st foot part, and a right heel placing clear indication part for clearly indicating the position of the heel of the right foot of the measurer is arranged at the position approximately above the installation surface contact part of the 2 nd foot part.

As recited in claim 2, preferably, the left and right heel placement indicators are recessed from an upper surface of the tread platform; a toe-placement preventing portion provided at a substantially right-and-left center portion of a front portion of an upper surface of the stepping table, the toe-placement preventing portion protruding upward from the upper surface of the stepping table and preventing a front portion of a foot from being placed thereon; the 3 rd installation surface contact portion is disposed on the left side of the toe mount preventing portion, and the 4 th installation surface contact portion is disposed on the right side of the toe mount preventing portion.

As described in claim 3, preferably, the toe rest prevention portion is configured such that a width in the left-right direction on a rear end side thereof is substantially equal to a distance between the left heel rest indication portion and the right heel rest indication portion, and is formed to gradually increase as it goes forward from the rear end thereof.

The invention has the following effects:

according to claim 1 of the present invention, since the installation surface abutment portion of the 1 st leg portion is configured to have a distance from the left-right center line of the stepping table shorter than the distance from the left-right center line of the installation surface abutment portion of the 3 rd leg portion, and the installation surface abutment portion of the 2 nd leg portion is configured to have a distance from the left-right center line shorter than the distance from the left-right center line of the 4 th installation surface abutment portion, the heel portions of the left and right legs of the measurement subject placed on the stepping table can be respectively arranged at substantially upper positions of the 1 st installation surface abutment portion and the 2 nd installation surface abutment portion, and the center portions of the front portions of the legs having a width wider than the heel portions can be easily arranged at substantially upper positions of the 3 rd installation surface abutment portion and the 4 th installation surface abutment portion, respectively.

Therefore, since the central portion where the leg is not mounted hardly requires rigidity, it is possible to reduce the number of ribs or rigid bodies, and to secure a space for accommodating the control member and the battery in this portion, thereby making it possible to make the entire thickness thinner.

Further, the size of the stepping deck can be minimized, and the weight and the size can be reduced. In addition, even when the person takes the normal upright posture, the person can take the normal upright posture as described above and place the person on the stepping deck, and the person can measure the body weight in the normal easy posture and can easily use the device.

According to claim 2 of the present invention, since the left heel placement indication portion and the right heel placement indication portion are recessed from the upper surface of the stepping table, the measurement subject feels a sense of discomfort or the like when only a part of the heel enters the left heel placement indication portion or the right heel placement indication portion. As a result, the measurer can naturally put the heels into the left heel placement indication portion and the right heel placement indication portion, and can be prompted to put the heels into the left heel placement indication portion and the right heel placement indication portion. Thus, the 1 st installation surface contact portion and the 2 nd installation surface contact portion arranged below the left heel placing explicit portion and the right heel placing explicit portion are easily aligned with the heel portions, respectively.

Further, since the toe rest prevention portion protruding upward from the upper surface of the stepping table is provided on the upper side of the upper surface of the stepping table between the 3 rd installation surface contact portion and the 4 th installation surface contact portion, the measurement person feels a sense of incongruity if the foot is placed on the toe rest prevention portion. As a result, the measurer can avoid placing the front part of the foot on the toe placing prevention unit, and can be prompted to place the front part of the foot on the left and right side sides of the toe placing prevention unit. Thus, the 3 rd installation surface contact portion disposed on the left side of the toe placement prevention portion can be easily aligned with the center portion of the front portion of the left foot, and the 4 th installation surface contact portion disposed on the right side of the toe placement prevention portion can be easily aligned with the center portion of the front portion of the right foot.

According to claim 3 of the present invention, since the toe rest prevention unit is configured such that the width of the rear end side is substantially the same as the distance between the left and right heel rest indication units and the width thereof gradually increases as the toe rest prevention unit advances forward from the rear end thereof, the measurer places the toe rest prevention unit on the stepping deck with the distance between the front portions of the left and right feet being greater than the distance between the center portions of the heel portions. This facilitates the disposition of the central portions of the heel portions of the left and right legs at positions substantially above the 1 st mounting surface contact portion and the 2 nd mounting surface contact portion, respectively, and the disposition of the central portions of the front portions of the left and right legs at positions substantially above the 3 rd mounting surface contact portion and the 4 th mounting surface contact portion, respectively. This makes it possible to easily align the 3 rd mounting surface contact portion with the center portion of the front portion of the left leg and the 4 th mounting surface contact portion with the center portion of the front portion of the right leg.

Drawings

Fig. 1 is a front view of a body composition weighing scale according to an embodiment of the present invention.

Fig. 2 is a side view of fig. 1.

Fig. 3 is a bottom view of fig. 1.

FIG. 4 is a view of a weighing scale (body) as a component viewed obliquely from belowAdult weight ).

Fig. 5 is an enlarged sectional view of the foot.

Fig. 6 is an enlarged perspective view of the sensor receiving member of the leg portion in a state where the sensor receiving member is removed.

Fig. 7 is a sectional view taken along line VII-VII of fig. 1.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings. Fig. 1 is a front view, fig. 2 is a side view, fig. 3 is a bottom view, and fig. 4 is a perspective view seen from an obliquely lower side of a body composition weighing scale according to an embodiment of the present invention.

The scale of the present embodiment is implemented as a body composition scale 1 capable of measuring body weight and body composition such as body fat percentage. The weighing scale 1 includes a scale body 2, leg portions 31 to 34 projected from a lower side of the scale body 2, inclination suppressing portions 41 to 44, and an operation portion 5.

The scale body 2 includes a stepping table 21 on which a measurer who measures body weight or the like steps. The outer peripheries of the left end side and the right end side of the step base 21 of this embodiment are formed in arc shapes, and the entire shape is formed in a substantially circular shape. A left heel placement display portion 22a and a right heel placement display portion 22b are provided on the upper surface of the tread base 21.

The left heel placement clear section 22a is a section for clearly indicating the position of the heel of the left foot on which the measurement subject is placed, and is disposed on the left rear portion of the upper surface of the tread table 21. The right heel placement clear indication portion 22b is a portion for clearly indicating the position of the heel of the right foot on which the measurement subject is placed, and is disposed on the right rear portion of the upper surface of the tread base 21 so as to be bilaterally symmetrical to the left heel placement clear indication portion 22 a.

In this embodiment, as shown in fig. 2 and 7, the left and right heel placing indicators 22a and 22b are formed to be recessed from the upper surface by a predetermined depth downward in a substantially circular shape, so that the user can know the positions.

The left heel placement indicator 22a and the right heel placement indicator 22b are provided with measuring electrodes 24, respectively, so as to be able to contact the heel portions placed on the left heel placement indicator 22a and the right heel placement indicator 22 b. These measuring electrodes 24 are used together with an external electrode 27 described later in the measurement of the body composition, and detect a resistance potential generated by a current applied to the external electrode 27.

In addition, a toe-rest preventing portion 25 is provided in the center portion of the left and right sides of the front portion of the upper surface of the stepping deck 21. The toe-placement preventing section 25 is a section for not placing the left and right forefoot portions of the measurer thereon and urging the center portions of the left and right forefoot portions to approach the upper positions of the 3 rd and 4 th foot portions 33 and 34, respectively, which will be described later, and in this embodiment, the toe-placement preventing section 25 is provided so as to protrude upward from the upper surface of the stepping deck 21, thereby giving a sense of discomfort or the like when the measurer places the left or right forefoot portion thereon, thereby urging the measurer to place the left forefoot portion on the left side of the toe-placement preventing section 25 and the right forefoot portion on the right side of the toe-placement preventing section 25, respectively.

In the present embodiment, the width of the toe rest prevention unit 25 in the left-right direction is configured to be the narrowest and smallest width V at the rear end side and gradually increase as it advances toward the front side. The minimum width V is set to be approximately equal to the distance L1 between the left heel placement indicator 22a and the right heel placement indicator 22 b.

Further, the external electrodes 27 are attached to the left and right sides of the toe mount preventing portion 25 on the upper surface of the stepping deck 21 so as to form a pair. These extra electrodes 27 are in contact with the front of the left foot and the front of the right foot of the measurer, respectively. And current is applied from these applied electrodes 27 to the anterior left and anterior right foot portions to which they are in contact.

As shown in fig. 2, the step platform 21 configured as described above is fixed to the upper side of the floor member 26 having substantially the same outer peripheral shape as the step platform 21, while covering the upper side.

Although not shown, the scale main body 2 houses a scale mechanism such as an a/D converter between the tread table 21 and the bottom plate member 26.

Next, the leg portions 31 to 34 will be explained. In the present embodiment, as shown in fig. 3 and 4, the leg portions 31 to 34 are configured by 4 of a 1 st leg portion 31 disposed on the left rear portion (on the right rear side in fig. 3 and 4) of the floor member 26, a 2 nd leg portion 32 disposed on the right rear portion, a 3 rd leg portion 33 disposed on the left front portion, and a 4 th leg portion 34 disposed on the right front portion. In addition, in the present embodiment, the leg portions 31 to 34 are formed of a synthetic resin separate from the scale main body 2.

As shown in fig. 3 to 6, the 1 st leg 31 includes a cylindrical body 6, a weight sensor 35 (shown in fig. 5 and 6), and a sensor receiving member 7 (only the cylindrical body 6 and the weight sensor 35 are shown in fig. 6, and the sensor receiving member 7 is omitted).

The upper end side (lower end side in fig. 6) of the cylinder 6 is fixedly (immovably) attached to the lower surface of the bottom plate member 26 of the scale main body 2, and the lower end side (upper end side in fig. 6) protrudes to a predetermined length below the bottom plate member 26 of the scale main body 2. The cylindrical body 6 includes an outer circumferential wall 61 and an inner circumferential wall 62. As shown in fig. 3, the cylindrical body 6 is provided with a cylindrical body extending portion 63 formed by extending the outer peripheral wall 61 and the inner peripheral wall 62 in an arc shape centered on the center O of the arc of the outer periphery of the floor member 26 (tread base 21) by a predetermined length in the counterclockwise direction (clockwise direction in fig. 1) in fig. 3 and 4.

Further, locking projections 64 (only the projection of the inner peripheral wall 62 is shown in fig. 6) are provided on the inner surface of the outer peripheral wall 61 and the inner surface of the inner peripheral wall 62, respectively. These locking projections 64 are provided at positions facing each other so as to project toward the inside of the cylindrical body 6 as locking members for locking the sensor receiving member 7.

The weight sensor 35 is a member for detecting a load (body weight) acting on the stepping platform 21 of the scale main body 2, and in the present embodiment, is constituted by a load cell having a strain gauge. The weight sensor 35 is disposed substantially below the left heel placement indicator 22a of the tread base 21 in the tubular body 6 so as to mainly receive a load acting on the left heel placement indicator 22 a.

As shown in fig. 4 and 5, the sensor receiving member 7 includes a receiving portion body 70, and an outer peripheral wall 73 and an inner peripheral wall 74 protruding upward from the receiving portion body 70. As shown in fig. 5, the receiving portion body 70 includes a receiving portion 71 on the upper surface side for receiving the weight sensor 35 from the lower side. Further, an installation surface contact portion 72 is provided on the lower surface side of the sensor receiving member 7.

The installation surface contact portion 72 is a portion that contacts an installation surface 100 such as a floor surface on which the body scale 1 is installed, and in this embodiment, is formed on a lower surface of a circular thin plate-like member 77 made of synthetic rubber that is separate from the receptacle main body 70.

Then, the upper surface side of the thin plate-like member 77 is bonded to a position below the receiving portion 71 on the lower surface of the receiving portion body 70 by an adhesive means such as an adhesive, whereby the installation surface abutting portion 72 is provided at a position below the receiving portion 71 on the lower surface of the receiving portion body 70. The installation surface contact portion 72 is formed so as to protrude downward from the lower surface of the receiving portion main body 70.

Further, a sensor receiving member extension portion 76 is provided on the sensor receiving member 7. As shown in fig. 3 and 4, the sensor receiving member extension portion 76 is formed by extending the receiving portion main body 70, the outer peripheral wall 73, and the inner peripheral wall 74 in an arc shape having substantially the same shape as the outer peripheral wall 61 and the inner peripheral wall 62 of the cylindrical body 6, toward the counterclockwise direction (the clockwise direction in fig. 1) in fig. 3.

As shown in fig. 5, receiving holes 75 for receiving the locking projections 64 of the cylindrical body 6 are formed in the outer circumferential wall 73 and the inner circumferential wall 74, respectively.

The height above and below the accommodation hole 75 is higher than the height above and below the locking projection 64 of the cylindrical body 6, and the locking projection 64 can move in the vertical direction in the accommodation hole 75 in a state of entering the accommodation hole 75.

The sensor receiving member 7 configured as described above is fitted into the cylindrical body 6 so as to close the lower surface side of the cylindrical body 6 in a state where the locking projection 64 of the cylindrical body 6 is accommodated in the accommodation hole 75, and receives the weight sensor 35 from the lower side by the receiving portion 71. Thereby, the sensor receiving member 7 is locked to the cylindrical body 6 so as to be movable up and down.

The sensor receiving member 7 inserted into the cylindrical body 6 is biased downward by a coil spring 8 as a biasing member. Specifically, the upper side of the coil spring 8 is housed in a cylindrical spring housing 63a provided in the cylinder extension 63 of the cylinder 6, and the upper end of the coil spring 8 abuts on the rear end surface of the spring housing 63 a.

The lower side of the coil spring 8 is accommodated in a cylindrical spring accommodating portion 76a provided in the sensor receiving member extending portion 76 of the sensor receiving member 7 when the sensor receiving member 7 is placed in the cylindrical body 6, and the lower end of the coil spring 8 abuts on the back end surface of the spring accommodating portion 76 a. Thus, the sensor receiving member 7 is always biased in the backward direction in which the scale main body 2 and the cylinder 6 are backward by the coil spring 8. Further, by this biasing force, the upper end of the locking projection 64 of the cylindrical body 6 comes into contact with the upper inner wall surface 75a of the receiving hole 75.

The installation surface contact portion 72 of the sensor receiving member 7 locked to the cylinder 6 is disposed substantially below the left heel placement explicit portion 22a of the platform 21 of the scale body 2.

As shown in fig. 3, the 2 nd leg unit 32 is disposed so as to be bilaterally symmetric to the 1 st leg unit 31 about a left-right center line P1 of the stepping deck 21, and is set so that a distance L2 from the installation surface contact portion 72 of the 2 nd leg unit 32 to the left-right center line P1 is substantially equal to a distance L3 from the installation surface contact portion 72 of the 1 st leg unit 31 to the left-right center line P1.

Although not shown, the installation surface contact portion 72 of the 2 nd leg portion 32 is disposed substantially below the right heel placement explicit portion 22b of the stepping deck 21 of the scale body 2. The other parts of the 2 nd leg part 32 have the same structure as the 1 st leg part 31.

The weight sensor 35 and the installation surface contact portion 72 of the 3 rd leg portion 33 are disposed below the toe placement prevention portion 25 of the tread base 21 on the left side (the right side in fig. 3). As shown in fig. 3, the distance L5 from the installation surface contact portion 72 of the 3 rd leg portion 33 to the left-right center line P1 of the step base 21 is configured to be longer than the distance L3 of the installation surface contact portion 72 of the 1 st leg portion 31.

The cylinder extension 63 of the cylinder 6 and the sensor receiving member extension 76 of the sensor receiving member 7 of the 3 rd leg 33 are extended in the clockwise direction in fig. 3 (counterclockwise direction in fig. 1) to the position of the front-rear center line P2 of the stepping table 21. The other portions have the same structure as the above-described 1 st leg portion 31.

The 4 th leg part 34 is disposed so as to be bilaterally symmetric to the 3 rd leg part 33 about a left-right center line P1 of the stepping table 21, and a distance L4 from the installation surface contact part 72 of the 4 th leg part 34 to the left-right center line P1 is set to be longer than the distance L2 of the installation surface contact part 72 of the 2 nd leg part 32. The other parts of the 4 th leg part 34 have the same structure as the 3 rd leg part 33.

Next, the inclination suppressing parts 41 to 44 will be described. The inclination suppressing portions 41 to 44 suppress inclination of the stepping platform 21 with respect to the installation surface 100 (shown in fig. 5) when the measurer is placed on the outer peripheral side of the stepping platform 21 of the scale body 2.

As shown in fig. 3 and 4, the inclination suppressing portions of the present embodiment are configured by 4 of a 1 st inclination suppressing portion 41 configured by the cylinder extending portion 63 of the cylinder 6 of the 1 st leg portion 31 and the sensor receiving member extending portion 76 of the sensor receiving member 7, a 2 nd inclination suppressing portion 42 configured by the cylinder extending portion 63 of the cylinder 6 of the 2 nd leg portion 32 and the sensor receiving member extending portion 76 of the sensor receiving member 7, a 3 rd inclination suppressing portion 43 configured by the cylinder extending portion 63 of the cylinder 6 of the 3 rd leg portion 33 and the sensor receiving member extending portion 76 of the sensor receiving member 7, and a 4 th inclination suppressing portion 44 configured by the cylinder extending portion 63 of the cylinder 6 of the 4 th leg portion 34 and the sensor receiving member extending portion 76 of the sensor receiving member 7.

As shown in fig. 5, in the state where the body composition weighing scale 1 is set with the respective setting surface contact portions 72 in contact with the setting surface 100, the inclination suppressing portions 41 to 44 configured as described above are arranged at a position higher than the setting surface contact portions 72 and are in a non-contact state with the setting surface 100.

As shown in fig. 3, the 1 st inclination suppression portion 41 and the 3 rd inclination suppression portion 43 protrude from the outer circumferential side of the line Q1 connecting the installation surface contact portions 72 of the 1 st leg portion 31 and the adjacent 3 rd leg portion 33 of the tread base 21 to each other, and are disposed at positions below the exposed portion 21a exposed to such a large extent that the legs can be placed. The 2 nd inclination suppressing portion 42 and the 4 th inclination suppressing portion 44 protrude from the outer circumferential side of the line Q2 connecting the installation surface contact portions 72 of the 2 nd leg portion 32 and the adjacent 4 th leg portion 34 of the tread base 21 to each other, and are disposed at positions below the exposed portion 21a exposed to such an extent that the legs can be placed.

The rear end portions of the 3 rd inclination suppression portion 43 and the 4 th inclination suppression portion 44 are disposed at positions below the front-rear center of the stepping table 21.

Returning to fig. 1, the operation unit 5 will be described. The operation unit 5 of the present embodiment includes a display unit 51 on the front side, and the display unit 51 numerically displays, for example, the measured body weight and body composition. Further, a plurality of operation buttons 52 are provided on both the left and right sides of the display unit 51, and by pressing the operation buttons 52, it is possible to input information such as age, height, and sex in the case of measuring body composition, or to select numerical data displayed on the display unit 51.

The operation unit 5 of the present embodiment is connected to the scale main body 2 in a wired or wireless communication manner (in the present embodiment, although not shown, it may be connected by a wire), is detachable from the scale main body 2, and is configured to be detachable from the scale main body 2 to measure the body composition on the upper side of the body. More specifically, grip portions 53 to be gripped by hand are provided at both left and right ends of the operation portion 5, and a measurement electrode 54 and an external electrode 55 (shown in fig. 4) are provided on each of the grip portions 53.

In the present embodiment, the measurement electrode 54 and the additional electrode 55 are provided on the left and right grip portions 53 of the operation portion 5, respectively, but may be provided on either the left or right side, and may be changed as appropriate.

The operation unit 5 includes, although not shown, a memory as a storage device in which programs and the like of the present system are recorded, a CPU as a control device which executes the programs and the like recorded in the memory, and the like.

When the body weight scale 1 configured as described above is used to measure, for example, the body weight, the respective installation surface contact portions 72 of the body weight scale 1 are brought into contact with the floor surface 100 as the installation surface, the power supply is turned on, the operation buttons 52 of the operation unit 5 are operated, and the display unit 51 is brought into a state in which the body weight measurement value can be displayed.

In this state, for example, the heel of the left foot is placed on the left heel placement explicit section 22a of the platform 21 of the scale main body 2, and the heel of the right foot is placed on the right heel placement explicit section 22 b.

At this time, the measurer places the left forefoot portion on the left side of the left heel placement explicit section 22a so as not to be placed on the toe placement preventing section 25, and places the right forefoot portion on the right side of the right heel placement explicit section 22b so as not to be placed on the toe placement preventing section 25.

This allows the heel portions to be positioned and arranged substantially above the weight sensor 35 and the mounting surface contact portion 72 of each of the 1 st leg portion 31 and the 2 nd leg portion 32. Further, the center portion of the left foot front portion can be disposed so as to be positioned substantially above the body weight sensor 35 and the mounting surface contact portion 72 of the 3 rd foot portion 33, and the center portion of the right foot front portion can be disposed so as to be positioned substantially above the body weight sensor 35 and the mounting surface contact portion 72 of the 4 th foot portion 34.

The load applied to the stepping deck 21 is detected by the weight sensors 35 of the legs 31 to 34, and the operation unit 5 performs calculation and the like based on the data detected by the weight sensors 35 and displays the result as a weight measurement value on the display unit 51.

In this case, since the weight sensor 35 and the mounting surface contact portion 72 of each of the 1 st leg portion 31 to the 4 th leg portion 34 are disposed substantially below the portion on which the weight of the measurement subject acts, the stepping platform 21 and the like can transmit the force to the weight sensor 35 vertically without causing unnecessary warpage due to the load, the weight of the measurement subject can be detected as directly as possible, and the accurate weight can be obtained.

When the user places the left foot on the protruding portion 21a on the left outer peripheral side of the step platform 21 when the user places the foot on the step platform 21, the 1 st hydrogen inclination suppressing portion 41 and the 3 rd inclination suppressing portion 43 are in contact with the floor surface 100, and therefore the step platform 21 is hardly inclined with respect to the floor surface 100, and a safe structure can be obtained.

Similarly, when the measurer places the right foot on the right outer peripheral extension 21a of the stepping deck 21, the 2 nd inclination suppression portion 42 and the 4 th inclination suppression portion 44 are in contact with the floor surface 100, so that the stepping deck 21 is hardly inclined with respect to the floor surface 100, and a safe structure can be obtained.

When measuring the body composition of the foot of the measurer, for example, the body composition measurement value is set to a displayable state on the display unit 51 by operating the operation button 52 of the operation unit 5, and is set to a state in which the current can be applied from the external electrode 27 provided on the stepping table 21. In this state, the measurer may be placed on the stepping platform 21 as in the case of the above-described weight measurement.

Thereby, the resistance potential generated by the applied current is detected by the measurement electrode 24. The operation unit 5 calculates the body composition such as the body fat percentage and the body fat mass of the legs of the measurement subject based on the detected impedance, the measured weight value, and the information such as the height, age, and sex of the measurement subject inputted to the operation unit 5 in advance, and displays the body composition on the display unit 51.

When the body composition of the upper part of the body of the measurement subject is measured, for example, the operation button 52 of the operation unit 5 is operated to set a state in which the current can be applied to the external electrode 55 provided on the operation unit 5. The operation unit 5 is detached from the scale main body 2, the left and right grip portions 53 are held by the left and right hands, respectively, and the hands are brought into contact with the measurement electrodes 54 and the additional electrodes 55, and the arms are extended.

Thus, similarly, the impedance is detected by the measurement electrode 54, and the operation unit 5 calculates the body composition such as the body fat percentage and the body fat mass of the upper part of the body of the measurement subject based on the impedance, the body weight measurement value, and the information of the height of the measurement subject previously input to the operation unit 5, and displays the body composition on the display unit 51.

In the above embodiment, the left and right heel placement indicators 22a and 22b are shown as being recessed from the upper surface, but this embodiment is not limiting and may be modified as appropriate. For example, the left heel placement explicit unit 22a and the right heel placement explicit unit 22b may be depicted on the upper surface of the stepping table 21.

In the above embodiment, the toe-placement preventing portion 25 is provided, but may not be provided. In the case where the toe cap prevention unit 25 is provided, the surface of the toe cap prevention unit 25 may be formed as a smooth surface or a concave-convex surface. By forming the uneven surface, if a measurer places a foot on the toe-placement preventing unit 25, it is immediately determined that the foot is placed on the toe-placement preventing unit 25 by the unevenness, and in this point, the uneven surface is preferably formed.

In the above embodiment, the scale according to the present invention is constituted by a body composition scale, but the present invention is not limited to this embodiment, and may be constituted by a dedicated scale for measuring only body weight, for example, and may be appropriately modified.

Claims (2)

1. A weighing scale for measuring the weight of a person to be measured by placing the person to be measured on a stepping platform provided on a scale body in a state of being installed on an installation surface and detecting the load applied to the stepping platform by weight sensors provided on a plurality of legs projecting downward from the scale body,

the leg parts include a 1 st leg part disposed below a left rear part of the stepping deck, a 2 nd leg part disposed below a right rear part of the stepping deck, a 3 rd leg part disposed below a left front part of the stepping deck, and a 4 th leg part disposed below a right front part of the stepping deck;

each of the leg portions has a mounting surface contact portion that contacts the mounting surface on a lower side of the body weight sensor;

the installation surface contact portion of the 1 st leg portion is configured to be shorter in distance from a left-right center line of the stepping table than the installation surface contact portion of the 3 rd leg portion;

the installation surface contact portion of the 2 nd leg portion is configured to be shorter in distance from the left and right center lines than the installation surface contact portion of the 4 th leg portion;

a left heel placement display section for displaying a position of a heel portion of a left foot of a measurement subject placed thereon is provided substantially above the installation surface contact section of the 1 st leg, and a right heel placement display section for displaying a position of a heel portion of a right foot of a measurement subject placed thereon is provided substantially above the installation surface contact section of the 2 nd leg;

a toe-placement preventing portion provided at a substantially right-and-left center portion of a front portion of an upper surface of the stepping table, the toe-placement preventing portion protruding upward from the upper surface of the stepping table and preventing a front portion of a foot from being placed thereon;

the toe-placement prevention section is configured such that a width in the left-right direction on a rear end side thereof is substantially equal to a distance between the left heel-placement indication section and the right heel-placement indication section, and gradually increases as it goes forward from the rear end thereof.

2. The scale of claim 1,

the left heel placing indication part and the right heel placing indication part are recessed from the upper surface of the stepping platform;

the installation surface contact portion of the 3 rd leg is disposed on the left side of the toe mount preventing portion, and the installation surface contact portion of the 4 th leg is disposed on the right side of the toe mount preventing portion.