JPH076826B2 - Mattress selection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a mattress selection device for selecting a mattress having a hardness suitable for a user's weight and physique.

(Prior Art) Generally, a bed is constructed by placing a mattress on a bed frame, but the quality of this bed depends largely on whether or not the hardness of the mattress is suitable for the weight and physique of the user. To be done.

That is, when looking at the sleep state of human beings, the sleep is the deepest when sleeping with the spine straightened to some extent in a supine position, and when the body is laid on a mattress, the waist is placed against the tangent of the back of the chest and buttocks. It is comfortable to sleep when it fits within a certain height of 2-3 cm. On the other hand, it has been recognized from physiology and ergonomics that a mattress in which the chest and buttocks are extremely lowered and the lumbar region is relatively pushed up is painful and cannot sleep. Therefore, a hard mattress is preferable in order to reduce the fall of the chest and buttocks. However, if the mattress is too hard, the chest and buttocks are less likely to fall, but the human body is supported only by these areas, so that the pressure is concentrated on the chest and buttocks, which also makes the patient feel uncomfortable.

By the way, in order to choose a mattress that is comfortable to sleep in, even if you choose a mattress that is just a hard mattress or a soft mattress, the amount of depression in your chest and buttocks will differ depending on the weight and physique of the person using this mattress. Come on. Therefore, the quality of a mattress is determined not only by whether the mattress is hard or soft, but also by whether the hardness of the mattress is suitable for the weight and physique of the person using the mattress. It is necessary to select a mattress based on various criteria.

Therefore, the applicant of the present invention has proposed a mattress selection method disclosed in Japanese Patent Application No. 61-25330. In this prior art, when a user lies on a measurement mattress, the arm-shaped displacement bodies are rotated according to the elastic deformation amount of the mattress, and the displacement bodies are interlocked with each other. A cord is connected to the upper end of the vertically moving interlocking rod. Then, by knowing the deformed state of the mattress by the line graph drawn by the cord, the user can select the mattress suitable for the user.

However, according to this prior art, in order to display the elastic deformation of the mattress as a line graph, the elastic deformation of the mattress is mechanically transmitted by converting it into the interlocking movement of the displacement body and the vertical movement of the interlocking rod. ing. Therefore, a loss occurs in the transmission, and the loss in each part that measures the amount of deformation of the mattress varies, so an error also occurs in the line graph drawn by the cords connected to the upper ends of the interlocking rods. , Sometimes the deformation of the mattress cannot be displayed accurately.

Further, since the structure for mechanically transmitting the deformation amount of the mattress causes an increase in the number of parts and a complicated structure, it may be easily damaged early due to impact or friction.

(Problems to be Solved by the Invention) As described above, since the conventional device has a structure for mechanically transmitting the elastic deformation amount of the mattress and displaying it, accurate display cannot be performed, or the number of parts is increased. Not only did the structure become complicated, but it was easily damaged.

The present invention has been made in view of the above circumstances, and an object thereof is to electrically display the elastic deformation of a mattress so that an error does not occur in the display and the structure is simplified. The present invention is to provide a mattress selection device which is made to be more durable and less likely to be damaged.

[Structure of Invention]

(Means and Actions for Solving Problems) In order to solve the above problems, the present invention provides a measurement mattress on which a user lies, and the measurement mattress when the user lies on the measurement mattress. A plurality of detectors that detect the amount of deformation as a change in electrical resistance value and the optimum deformation state of the measurement mattress are displayed in advance, and the detection signal from the detector compares the optimum deformation state. By so doing, a display unit is provided for displaying an actual deformed state of the measurement mattress for selecting a mattress having a hardness suitable for the user.

As a result, the amount of deformation of the mattress for measurement is displayed on the display unit, and by comparing it with the optimal deformation state of the mattress for measurement displayed in advance on the display unit, the mattress with the hardness suitable for the user is displayed. Can be selected.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.
The mattress selection device shown in FIG. 1 is a bed frame 1
Is equipped with. The bed frame 1 has a mounting plate 2 supported by legs 3 substantially horizontally. A mattress 4 for measurement is provided on the placing plate 2. This mattress 4 has a large number of coil springs 5 on the mounting plate 2 described above.
Are arranged in a matrix to form the spring unit 6, and the net 10 made of synthetic resin is formed on the upper surface of the spring unit 6.
An elastic material 7 such as urethane foam is bonded to the outer surface of the elastic material 7 with the outer material 8 being covered.

One end of the first string 9 is connected to the net 10 at a position corresponding to the center of the upper end surface of each row of the coil springs 5 located at the center of the spring unit 6 in the width direction. The other end of the first string 9 is guided to the lower surface side through a through hole 11 formed at a position corresponding to each coil spring 5 of the mounting plate 2 described above, where the first winding of the pulley 12 is performed. It is wound around part 12a. Each pulley 12 is a rotatable adjustment shaft of a variable resistor 13 as a detector, as shown in FIG.
It is connected to 14. Each variable resistor 13 is attached to an attachment member 15 provided along the longitudinal direction at the central portion in the width direction of the lower surface of the mounting plate 2 described above.

One end of the second string 16 is wound around the second winding portion 12b of the pulley 12. The other end of the second string 16 is connected to the other end of a tension spring 17 whose one end is connected to the mounting member 15, respectively. As the tension spring 17, a spring weaker than the coil spring 5 of the spring unit 6 is used. Therefore, even if the pulling force of the tension spring 17 acts on the pulley 12, the pulley 12 does not pull the first cord 9
It is prevented from rotating due to the tension of. And
The coil spring 5 is deformed by compression and the first string 9
When the slackens, the second string 16 is pulled by the tension spring 17 and the pulley 12 rotates. When the pulley 12 rotates, the adjustment shaft 14 of the variable resistor 13 also rotates, so that the resistance value of the variable resistor 13 changes.

The change in the resistance value of each variable resistor 13 is input to the control unit 18 provided on the lower surface side of the mounting plate 2 described above. Although not shown, the control unit 18 has an A / D converter and a CPU incorporated therein, which converts the resistance value from the variable resistor 13 into a digital signal and inputs the signal to the CPU. . And this CPU
The digital signal from is transmitted to a CRT 19 as a display unit, whereby the difference in resistance value of the eight variable resistors 13 is displayed on the CRT 19 as, for example, a first line graph G ₁ .

In order for the user to select a mattress suitable for himself using the mattress selection device configured as described above, the user lies on the mattress 4. Then, the coil spring 5 of the mattress 4 is elastically deformed according to the weight and physique of the user, and the net 10 is also curved by the deformation. For example, since the user's buttocks are heavier than the other parts and are largely protruded, the coil spring 5 corresponding to that part is largely deformed as compared with the coil springs 5 of the other parts. Then, the first string 9 connected to the portion of the net 10 corresponding to the coil spring 5
Is slackened, the pulley 12 is rotated by the pulling force of the tension spring 17 in the direction in which the first cord 9 is wound up by the slackened amount. When the pulley 12 rotates, the adjustment shaft 14 of the variable resistor 13 rotates in conjunction with the rotation of the pulley 12. Therefore, the variable resistor 13 provided at a position corresponding to the coil spring 5 thereof.
Changes its resistance value and the value is input to the control unit 18.

In this way, when the coil spring 5 corresponding to each part such as the buttocks and back of the user is deformed and the resistance value of the variable resistor 13 which is changed by the deformation is input to the control unit 18, the difference between these resistance values is detected. The corresponding first line graph G ₁ is displayed on the CRT 19. Therefore, it is necessary to select a mattress suitable for the user by comparing the first line graph G ₁ with the second line graph G ₂ which shows the ideal deformation state of the mattress preprinted on the CRT 19. You can That is, if the actual amount of deformation of the mattress 4 is larger than the ideal amount of deformation, a mattress that is harder than the mattress 4 is preferable, and if the amount of deformation is small, a soft mattress is preferable. If the deformation of the mattress 4 is in an almost ideal deformation state, but it is partially large or, on the contrary, small, the coil spring 5 in that portion should be made to have a hardness corresponding to the deformation. , A mattress suitable for the user can be provided.

In the above embodiment, the first string is connected to the deformation amount of the upper surface of the mattress, that is, the portion corresponding to the upper end surface of the coil spring 5 of the net 10, and the variable resistor is driven according to the slack amount. However, the mattress may be placed on a leaf spring, for example, and the variable resistor may be driven according to the amount of deformation of the leaf spring. By doing so, the deformed state of the lower surface side of the mattress can be displayed.

Further, as the detector, a strain gauge may be used instead of the variable resistor, as long as it is capable of electrically detecting the elastic deformation amount of the mattress.

〔The invention's effect〕

As described above, the present invention detects the deformation amount of the mattress when the user is supine as a change in the electrical resistance value by the detector, and displays the deformation state of the mattress on the display unit by the detection signal, The optimal deformation state of the mattress is displayed on the display unit in advance, and the two deformation states are compared to select a mattress having a hardness suitable for the user. Therefore, since the deformed state of the mattress can be electrically displayed, it can be displayed more accurately than the conventional mechanical display, and the structure can be simplified. Further, the damage is performed by selecting a mattress having a hardness suitable for the user by comparing the actually deformed state of the measuring mattress with the preset optimal deformed state, so that the mattress is selected. Can be performed accurately and reliably.

[Brief description of drawings]

The drawings show an embodiment of the present invention. FIG. 1 is a schematic view of the entire apparatus in which a mattress is cross-sectioned, FIG. 2 is a front view of the arrangement state of pulleys, FIG. 3 is the same side view, and FIG. 4 is the same. It is an expanded sectional view. 4 ... Mattress, 5 ... Coil spring, 6 ... Spring unit, 13 ... Variable resistor, 18 ... Controller,
19 …… CRT (display).

Claims (1)

[Claims] 1. A measurement mattress on which a user lies, a plurality of detectors for detecting the amount of deformation of the measurement mattress when the user lies on the measurement mattress as a change in electrical resistance, and The optimal deformation state of the mattress for measurement is displayed in advance, and the measurement for selecting a mattress having a hardness suitable for the user by comparing with the optimal deformation state by the detection signal from the detector. A mattress selection device, comprising: a display unit for displaying the actual deformation state of the mattress for use in mattresses.