WO2008134922A1

WO2008134922A1 - Stool for alarming occupant to pay attention to posture

Info

Publication number: WO2008134922A1
Application number: PCT/CN2008/000778
Authority: WO
Inventors: Zhengcai Li
Original assignee: Zhengcai Li
Priority date: 2007-04-29
Filing date: 2008-04-16
Publication date: 2008-11-13
Also published as: CN101292820A; CN101292820B

Abstract

A stool for alarming an occupant to pay attention to the posture includes a seat board (1), brackets (2) which support the seat board (1), a pressure-sensing device and an alarming device. The seat board (1) is connected to brackets (2) moveablely. The pressure-sensing devices sense the pressure information of different positions of the seat board (1) real time and according to the pressure information estimate the posture of the occupant and control the alarming device to activate.

Description

Remind the sitting stool

Technical field

BACKGROUND OF THE INVENTION 1. Field of the Invention This invention relates to a stool, and more particularly to a stool suitable for a student to be used to alert a sitting posture when sitting is not correct.

Background technique

There are many measures to prevent students from leaning forward and even leaning on the table when they are learning. For example: Use the brackets set on the edge of the table to hold the chin. When you write your homework, your eyes should move back and forth between the textbook and the homework. Head activities can cause inconvenience. When reading a book, you can't adjust your line of sight to the best angle. Using the strap attached to the back of the chair to prevent the upper body from leaning forward too much on the shoulder or chest of the student is inconvenient to use. Emergency situations such as fires are even more deadly; Chinese patent specification CN1210711 discloses a myopia preventer, which is provided with a signal receiver on the table with a guide cover that can block other signals, for receiving on the student's head or The signal from the signal transmitter on the body, when the student sitting on the stool (hereinafter referred to as the seater) excessively bows and causes the signal receiver to receive no signal, it will alarm. This kind of myopia preventor will put a part of the device on the head. The seater feels uncomfortable and limits the scope of the head too much. If you want to look down on the falling pen or leave the seat for a short time, you will be alerted. All of the above products limit the freedom of movement of certain parts of the body of the sitting person, and require the students to maintain a straight posture for a long time, which is very disadvantageous for the physical development of the adolescents, especially the neck muscles.

Summary of the invention

The technical problem to be solved by the present invention is to provide a free movement that does not restrict any part of the body of the person, when the seated person is in a posture in which the upper body is excessively leaning forward or sitting too close to the front edge of the stool (hereinafter referred to as sitting posture is not correct) or continuously maintained. A stool that can send a reminder signal after a certain period of time.

In order to solve the above technical problem, the technical solution of the present invention is: the stool is composed of a seat plate, a bracket, a pressure measuring and controlling device, and a reminding device, and a movable connection is adopted between the seat plate and the bracket for supporting the seat plate, and the pressure measuring and controlling device can be qualitatively Or quantitatively measure the pressure position information of the pressure position and size of the seat plate on the seat plate in real time, and determine the critical pressure information of the seat plate on the seat plate that reflects the correct sitting posture by using the structure of the stool itself or the preset manner. The pressure information measured in real time or the comprehensive pressure information in the continuous time period is compared with the critical pressure information, and according to the comparison result, whether or not the reminding device is actuated to issue a reminder signal, which may be a voice prompt, a music, a buzzer, etc. The sound signal can also be a vibration signal, or a light signal. When the upper body leans forward, the buttocks are slightly raised, the middle of the thigh is pressed against the front edge of the stool, the center of gravity of the body is moved forward, or the arm moves forward, which causes the front edge of the seat plate to be When the pressure is increased, the pressure on the trailing edge side of the seat plate is correspondingly reduced, and the seat plate is moved forward by the pressing point. Thus, the pressure of the seat on the seat plate and the front and rear position and upper body of the seated person sitting on the stool are visible. It is related to the degree of forward tilt. By qualitatively or quantitatively monitoring the pressure of the seat on the seat plate, it can be judged whether the seated person is sitting correctly.

This kind of stool does not limit the activities of the rider. It is not exposed on the table and stool that obstructs the freedom of movement and affects the appearance. It can be allowed to pick up items or read some small characters on the book, such as certain annotations. Bending down and bowing, just asking the rider not to lie on the table for a long time or to lean forward too much; Remind that sitting posture is more conducive to cultivating adolescents' consciousness than being forced to maintain a certain sitting position, and is more likely to be accepted by teenagers.

DRAWINGS

The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

Figure 1 is a schematic view of a first embodiment of the present invention.

Fig. 2 is an enlarged view of the vibrator 4 shown in Fig. 1.

Figure 3 is a schematic illustration of a second embodiment of the present invention.

Figure 4 is a schematic view of a third embodiment of the present invention.

detailed description

Figure 1 shows a first embodiment of the present invention, the stool that can be used to remind the sitting posture includes a seat plate 1, a bracket 2, a pressure measuring device, a reminding device 4, for the sake of simplicity, in all the drawings and the abstract drawing In the middle, the section lines of each component are uniformly drawn into metal section lines. The bracket 2 is a shelf composed of four bench legs; the pressure measuring and controlling device is composed of four pressure measuring devices 3, a circuit composed of a processor, a memory, a battery, a switch, etc., wherein the circuit is not shown in the figure, the switch and the battery case Appropriate position on the seat plate 1 for easy operation but not inconvenience, the rest of the circuit is placed inside the seat plate 1, and the four load cells 3 are respectively located between the four contact faces of the seat plate 1 and the bracket 2, each test The pressure device 3 is equivalent to an electronic scale, and can measure the pressure of the person sitting on the stool or the object placed on the stool in real time. The circuit uses the pressure measured by the four load cells 3 as an input signal, and the output signal is used for the output signal. To control the action of the reminding device; as shown in FIG. 2, the reminding device 4 is composed of a vibrating block 5, a cam mechanism composed of the cam 7 and the follower 8, and a compression spring 6, and the reminding device 4 is located on the seat plate 1 and is pressed by the thigh of the seated person. In a groove of a suitable position, the cam 7 is mounted on the seat plate 1 to be rotatable about a fixed center line, the compression spring 6 is supported by the follower 8, and the vibrating block 5 having a round cup shape is placed in the groove. On one of the steps, and cover The compression spring 6 is held, the top of which is exactly flush with the surface of the seat plate 1, and the compression spring 6 is in a free state, and the upper support surface is just in contact with the vibration block 5, at this time, the contact point of the follower 8 with the cam 7 is The distance of the rotation center line of the cam 7 is minimized. In order to prevent the vibration block 5 from protruding from the surface of the seat plate 1 when the distance between the contact point of the follower 8 and the cam 7 to the rotation center line of the cam 7 is not the smallest, it is conceivable to install two pulls. Extending the spring 9, the sum of the elastic coefficients is less than the pressure The elastic modulus of the contraction spring 6 is fixed to both the seat plate 1 and the vibration block 5 at both ends of the tension spring 9, and is slightly stretched to function to reset the vibration block 5. When the cam 7 rotates about its rotation center line, the follower 8 performs a complex linear motion in the direction of the surface of the vertical seat plate 1, such as when the vibration block 5 is pressed by the seater's leg and cannot move sufficiently upward, the follower 8 forces the compression spring 6 to be compressed, and the vibration of the vibration block 5 can also be felt in the thigh of the seat. Hereinafter, the ratio of the sum of the pressures measured by the two pressure measuring devices 3 on the hind legs of the stool to the sum of the pressures of the two pressure measuring devices 3 on the front legs of the stool is said to be the pressure ratio at that moment. According to the relevant standard or experimental data, a critical pressure ratio is selected. The difference between the pressure ratio at a certain moment and the critical pressure ratio is called the net pressure ratio at that moment. If the net pressure ratio at a certain moment is less than 0, the seated posture is assumed. Not correct, otherwise, the seater is sitting correctly. In addition, the parameters t, m, and n are set in advance, generally taking nm. From the time when the circuit is turned on, the processor calculates the net pressure ratio every time t, and sends a reminder signal when one of the following two conditions is satisfied, that is, the cam 7 Rotating at a certain speed for several weeks, through the upper and lower movement of the follower 8 and the action of the compression spring 6, the vibrating block 5 vibrates, reminding the occupant to move the stool forward and sit up straight, one, from the circuit or After the last reminder that the sum of the n net pressure ratios is not less than 0, and after the time mt, the net pressure ratio is added to each of the previous net pressure ratios until the sum is less than 0 and is issued. Reminder signal; Second, calculate the sum of the consecutive n net pressure ratios after each reminder, if less than 0, remind again. Obviously, the pressure ratio at a certain moment accurately reflects the position of the seat plate 1 at the time of the seater's pressure. The smaller the pressure ratio is, the higher the action point is, indicating that the seater is sitting higher or the upper body is leaning forward. . As you sit up straight and look up at the blackboard during the lecture, the critical pressure ratio should be larger. In comparison, the upper body should be slightly inclined forward when writing, and the critical pressure ratio can be smaller. Therefore, multiple presets can be set (usually 2~) 3) Critical pressure ratio and its selection key, only one of which can be selected at a time; each parameter can be designed according to specific requirements, such as t=6 seconds, m=60, n=40 _o. This circuit is relatively simple, the required memory The capacity is not large, the pressure ratio is basically irrelevant to the weight of the person sitting. The vibration reminder is very concealed, does not affect others and aggravates the psychological pressure of the rider. It can be used by students in any occasion, sitting at the rear edge of the seat plate 1 Increasing the pressure ratio will prompt the students to move the stool forward. This not only makes it inconvenient and unnecessary for the upper body to lean forward too much, but also achieves the purpose of developing a good sitting habit, and avoids leaning the backrest of the stool against the back table to influence others to learn.

3 shows a second embodiment, the pressure measuring and controlling device is composed of a sleeve 10, a rotating shaft 11, a compression spring 14, a circuit composed of a processor, a memory, a battery, a switch, a contact 12, a contact 13, and the like, reminding The device is a buzzer, and the sleeve 10 is fixed on the bracket 2, substantially at an intermediate position, and the rotating shaft 11 matched with the sleeve 10 is integrally connected with the seat plate 1 (the sleeve 10 can also be connected to the seat plate, The rotating shaft 11 is connected to the bracket. The front and rear sides of the seat plate 1 or the bracket 2 are based on the center line of the rotating shaft 11, and the contact 12 on the front lower surface of the seat plate 1 and the front side of the bracket 2 are on the front side. The contact of the contact 13 on the surface is The necessary conditions for the whole circuit to be turned on, wherein the rest of the circuit and the buzzer are not shown in the figure, and the switch, the battery case, and the buzzer are disposed on the seat plate 1 or the bracket 2 for convenient operation but not in a proper position, by the processing The memory integrated circuit board is placed inside the seat plate 1 or the bracket 2. Normally, the seat plate 1 and the rear side of the bracket 2 are fitted to each other, and the upper surface of the seat plate 1 is in a horizontal position, and a small opening is formed between the front lower surface of the seat plate 1 and the front upper surface of the bracket 2. In order to make the seat plate 1 adhere to the bracket 2 when the seat plate 1 is not pressed, the following measures are taken: a predetermined amount of preload is placed in the middle of the front edge between the seat plate 1 and the bracket 2 but is not pressed to The compression spring 14 in the extreme position (may also be provided with a plurality of compression springs having a certain preload amount, generally arranged in a line parallel to the rotation shaft 11); the sleeve 10 is fixed at the position on the middle leading edge side of the bracket 2, so that the seat The center of gravity of the board 1 is on its rear side. When the sitting posture is not correct, the pressure on the front surface of the front side of the seat plate 1 is correspondingly increased or the action point is moved forward. After reaching a certain level, the seat plate 1 can be rotated relative to the bracket 2, and the contact 12 is in contact with the contact 13 The circuit is turned on. When the circuit is in the continuous ON state for a certain set time, the buzzer beeps to remind the occupant to pay attention to the sitting posture. After the reminder signal is issued, if the original setting time or shorter is set The circuit remains in the ON state for a certain period of time, indicating that the seater has not corrected the sitting posture during this period, and continues to beep to remind the rider to pay attention to the sitting posture. Contacting the contact 12 with the contact 13 requires that the force applied to the seat plate 1 to the center line of the rotating shaft 11 is the critical pressure information, depending on the gravity of the seat plate 1 and the distance from the center of gravity to the center line of the rotating shaft 11, compression The amount of preload of the spring 14, the coefficient of elasticity, and its distance from the centerline of the shaft 11. The pressure measuring and controlling device of the embodiment can qualitatively measure the pressure information of the seat on the seat plate 1. When the circuit is turned on, the sitting posture is not correct. Otherwise, the sitting posture is correct, and the circuit is simpler than the first embodiment.

Figure 4 shows a third embodiment. The stool that can be used to remind the sitting posture also includes a seat plate 1, a bracket 2, a pressure measuring device, and a reminding device. The pressure measuring and controlling device is composed of a sleeve 10, a rotating shaft 11, and a compression spring 14, and the structural features of the portion are the same as those of the second embodiment, which is only reduced compared with the pressure measuring and controlling device of the second embodiment. The circuit portion is composed of a vibration block 5, a compression spring 6, and a spring seat 15. The seat plate 1 has a stepped through hole at a suitable position pressed by the seated thigh of the seat, and a corresponding position in the bracket 2 The groove and the axial section of the spring seat 15 are in a "convex" shape, and are placed in the groove on the bracket 2, and the spring seat 15 and the bracket 2 can also be integrally formed, and the compression spring 6 is placed on the step of the spring seat 15. The vibrating block 5 has a round cup shape, is placed on the through hole step of the seat plate 1, and covers the compression spring 6, the top of which is flush with the surface of the seat plate 1, and the compression spring 6 is in a free state, and the upper support surface thereof Just in contact with the vibration block 5. When the sitting posture is not correct, the pressure on the front surface of the front side of the seat plate 1 is correspondingly increased or the action point is moved forward. After reaching a certain degree, the seat plate 1 is rotated relative to the bracket 2, and the compression spring 6 is compressed, the seated thigh The feeling of pressure from the vibrating block 5 jacked up by the compression spring 6 can be felt, and the seated person is reminded to pay attention to the sitting posture. After correcting the sitting posture, the seat plate 1 is rotated backward (counterclock). The sense of oppression naturally disappears. In order to overcome the gravity of the seat plate 1 and the supporting force of the compression spring 14 against the seat plate 1 to rotate the seat plate 1, the minimum moment of the force applied to the center line of the rotating shaft 11 by the seat plate 1 is the critical pressure information. The stool of the embodiment has a simple structure, and the reminder signal can be sent in real time when the sitting posture is not correct, and the more the seater sits forward or the upper body leans forward, the stronger the reminder signal is.

Obviously, for the first two embodiments, the reminder devices can be interchanged, and voice prompts, music, flashing lights, and the like can also be adopted. For the latter two embodiments, the relative rotation of the rotating shaft 11 and the sleeve 10 is not only related to the sitting posture of the seater, but also related to the weight of the seater, and the compression spring 14 of the appropriate elastic coefficient is selected according to the weight of the seater; The moving device makes the rotating shaft 11 and the sleeve 10 unable to rotate relative to each other.

Claims

Claim

1. A stool for reminding attention to sitting posture, comprising a seat plate (1), a bracket (2), a pressure measuring and controlling device, and a reminding device, wherein the bracket (1) is for supporting the seat plate (2), and the feature thereof In: the seat plate

(I) adopting an active connection with the bracket (2); the pressure measuring and controlling device is used for real-time measuring the pressure information of the seat on the seat plate (1), and determining a seater who can reflect the correct sitting posture to the seat plate The critical pressure information of (1) compares the pressure information measured in real time or the comprehensive pressure information in the continuous time period with the critical pressure information, determines whether the sitting posture of the seat is correct according to the comparison result, and controls the action of the reminding device.

2. The stool according to claim 1, wherein: said pressure measuring and controlling device comprises four voltage measuring devices (3) and a circuit composed of a processor, a memory, a battery, a switch, etc., said four measuring The pressure device (3) is respectively located between the seat plate (1) and the four contact faces of the bracket (2), and can measure the pressure of the object on the stool in real time; select a critical pressure ratio and a parameter t, m, n, from the moment of turning on the circuit, the processor calculates the net pressure ratio every time t, and causes the reminding device to issue a reminding signal when one of the following two conditions is satisfied, one, from the circuit or after After the last reminder that the sum of the net pressure ratios is not less than 0, and then the time of the time mt, the net pressure ratio is added to each of the previous net pressure ratios until the sum is less than 0 and a warning signal is issued. Second, calculate the sum of the consecutive n net pressure ratios after each reminder. If it is less than 0, remind again.

3. A stool according to claim 2, wherein: a plurality of threshold pressure ratios and corresponding radio buttons are preset in said circuit.

4. The stool according to claim 1, wherein: said pressure measuring and controlling device comprises a sleeve (10), a rotating shaft (11), a processor, a memory, a battery, a switch, a contact (12), a contact (13) The circuit component of the composition, the contact (12) is located on the lower surface of the front side of the seat plate (1), and the contact (13) is located at a corresponding position on the upper surface of the front side of the bracket (2) The contact of the contact (12) with the contact (13) is a necessary condition for the whole circuit to be turned on, and the sleeve (10) is fixed on the seat plate (1) or the bracket (2). , substantially in an intermediate position, the shaft that matches the sleeve (10)

(II) being integrated with the bracket (2) or the seat plate (1), taking measures to make the seat plate (1) without pressure, the seat plate (1) and the The rear sides of the brackets (2) are fitted to each other, and a small opening is formed between the front lower surface of the seat plate (1) and the front upper surface of the bracket (2), and the seat plate (1) The contact (12) can be brought into contact with the contact (13) by rotating relative to the bracket (2); the reminding device is reminded when the circuit is in a continuously on state for a certain set time The signal, if the circuit is still kept on for another set time after the original set time or shorter after the reminder signal is issued, continues to cause the reminding device to issue a reminder signal.

5. A stool according to claim 2 or 4, characterized in that the reminding device consists of a vibration block (5), a cam mechanism consisting of a cam (7) and a follower (8), a compression spring (6) a component mounted in a recess on the seat panel (1) at a suitable position pressed by the thigh of the occupant, the cam (7) being rotatable about a fixed centerline to cause the slave The member (8) performs a complex linear motion in a direction perpendicular to the surface of the seat plate (1), the compression spring (6) is supported by the follower (8), and the vibration block 5 is placed on a step in the groove And covering the compression spring (6), the top of the vibration block (5) is flush with the surface of the seat plate (1), the compression spring (6) is in a free state and the upper support surface is exactly the same The vibration block (5) contacts, and the distance between the contact point of the follower (8) and the cam (7) to the center line of rotation of the cam (7) is minimized.

The stool according to claim 1, wherein: the pressure measuring and controlling device comprises a sleeve (10) and a rotating shaft (11), and the sleeve (10) is fixed to the seat plate (1) or On the bracket (2), substantially at an intermediate position, the rotating shaft (11) matched with the sleeve (10) is integrally connected with the bracket (2) or the seat plate (1), and measures are taken When the seat plate (1) is not pressed, the seat plate (1) and the rear side of the bracket (2) are in contact with each other, and the front lower surface of the seat plate (1) is There is a small opening between the upper surface of the front side of the bracket (2), and the seat plate (1) is rotatable relative to the bracket (2); the reminding device is composed of a vibration block (5) and a compression spring ( 6), the spring seat (15) is composed of a stepped through hole at a suitable position on the seat plate (1) pressed by the seated thigh, and the spring seat (15) is fixed to the bracket a corresponding position of (2) for supporting the compression spring (6), the vibration block (5) being placed on the step of the through hole and covering the compression bomb (6), the top of the vibration block (5) is flush with the surface of the seat plate (1), the compression spring (6) is in a free state and the upper support surface is just in contact with the vibration block (5) .

7. A stool according to claim 4 or 6, wherein: the means for attaching the seat panel (1) to the bracket (2) when the seat panel (1) is unstressed may be: At least one compression spring (14) in a compressed state and which can be continuously compressed is disposed between the front lower surface of the plate (1) and the front upper surface of the bracket (2).

The stool according to claim 4 or 6, wherein: the means for attaching the seat panel (1) to the bracket (2) when the seat panel (1) is not pressed may be: The center of gravity of the plate (1) is on the back side.