JP3229071U - Anti-pinching safety device for electric lift chairs - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pinch prevention safety device for an electric lift chair capable of detecting the presence or absence of a foreign substance in a space below a seat and preventing a pinch accident. SOLUTION: This is a pinch prevention safety device for an electric lifting chair, which is applied to an electric lifting chair including a seat, a backrest, and a footrest, and also includes a central processing unit 10 and a plurality of detection devices 20. The elevating device 30, the power supply device 40, and the control device 50 are provided, and the plurality of detection devices are electrically connected to the central processing unit and detect the presence or absence of foreign matter in the space below the seat of the electric elevating chair. The first detection sensor 21 and at least one second detection sensor 22 are included, and the first detection sensor and the second detection sensor are different types of sensors, and the plurality of lifting devices are seats of an electric lifting chair. , The backrest and the footrest are connected to the seat, the backrest and the footrest so that the backrest and the footrest can be moved respectively, the power supply device is electrically connected to the central processing unit, and the control device is electrically connected to the central processing unit. Will be done. [Selection diagram] Fig. 1

Description

The present invention relates to a chair safety device, and more particularly to a pinch prevention safety device for an electric lift chair.

With the aging society, the demand for elderly-friendly daily necessities such as height-adjustable chairs is increasing. In recent years, electric lift chairs that assist the elderly with weak legs to stand up and sit down are on the market. There are many on the market.

The existing electric lift chair includes a seat, a backrest, a footrest, and a linkage mechanism connected to the seat, the backrest, and the footrest, and the user can use the linkage mechanism via a control device. By controlling, the height of the seat, the inclination of the backrest, and the insertion and removal of the footrest can be adjusted. According to such a configuration, the seat can be raised so as to be close to the user's buttocks so that the user can easily sit on the seat, and after sitting, the seat can be raised again as desired. You can also adjust the backrest and footrest to a comfortable position to your liking.

However, the existing electric lift chair has the following drawbacks.

1. Since there is a blind spot area of the user's line of sight in the space below the seat, if a child or pet enters this blind spot area while the seat is descending, it will be sandwiched between the seat or the linkage mechanism. , There was a risk of an accident.

2. If the existing electric lift chair pinches a foreign object in the space below the seat, it may be broken or damaged.

The present invention has been made in view of the above-mentioned drawbacks of the prior art, and by installing a plurality of detection devices, it is possible to detect the presence or absence of foreign matter in the space below the seat and prevent a pinch accident. It is an object of the present invention to provide a pinch prevention safety device for an electric lift chair.

In order to achieve the above object, the present invention is a pinch prevention safety device for an electric lift chair, which is applied to an electric lift chair including a seat, a backrest, and a footrest, and also includes a central processing device and a plurality of devices. The detection device, the plurality of elevating devices, the power supply device, and the control device are provided, and the plurality of detection devices are electrically connected to the central processing device and the space below the seat of the electric elevating chair. The first detection sensor and at least one second detection sensor are included, and the first detection sensor and at least one second detection sensor are different types of sensors, and the plurality of lifting devices Is connected to the seat, backrest, and footrest so that the seat, backrest, and footrest of the electric lift chair can be moved, and the power supply device is electrically connected to the central processing device. The control device is electrically connected to the central processing device and is used to transmit a command signal to the central processing device. When the first detection sensor detects a foreign object, the first detection sensor sends a command signal to the central processing device. 1 The detection signal is transmitted, whereby the central processing device enters a lock mode for stopping the movement of the plurality of elevating devices, and when the at least one second detection sensor detects a foreign object, the central processing device A second detection signal is transmitted to the central processing device, whereby the central processing device enters a lock mode for stopping the movement of the plurality of elevating devices.

According to the above-mentioned technical features, the pinch prevention safety device for the electric lift chair according to the present invention uses a plurality of different types of detection devices, so that even if some of the detection devices stop working, other devices can be used. The detection device can still prevent pinching accidents, and when a foreign object is detected in the space below the seat, it automatically enters the lock mode and the operation of the electric lift chair can be stopped instantly. , Ensuring high safety.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings, and the technical measures taken by the present invention to achieve the intended creative purpose will be further described.

It is a figure which shows the structural baht of the pinch prevention safety device for an electric lift chair which concerns on this invention. It is a side view schematic diagram which shows the state which the pinch prevention safety device for an electric lift chair which concerns on this invention is attached to an electric lift chair. It is a schematic diagram which shows the use state of the pinch prevention safety device for an electric lift chair which concerns on this invention. It is a schematic diagram which shows the use state of the pinch prevention safety device for an electric lift chair which concerns on this invention.

In the first embodiment shown in FIGS. 1 and 2, the pinch prevention safety device for an electric lift chair according to the present invention is applied to the electric lift chair 80, and the electric lift chair 80 includes a seat portion 81 and a seat portion 81. A backrest 82, a footrest 83, and a linkage mechanism 84 installed in the electric lift chair 80 are provided. The linkage mechanism 84 is made of a conductive material, and has a seat portion 81, a backrest 82, and feet. It is connected to the loading platform 83. Since the electric lift chair 80 is an existing commercially available product, its features and detailed structure will not be described here.

The pinch prevention safety device for an electric lift chair according to the present invention includes a central processing unit 10, a plurality of detection devices 20, a plurality of lift devices 30, a power supply device 40, and a control device 50. The detection device 20, the plurality of elevating devices 30, the power supply device 40, and the control device 50 are electrically connected to the central processing unit 10.

In the first embodiment of the present invention, the central processing unit 10 is a microcomputer and is used to drive the elevating device 30 based on the signals received from the plurality of detection devices 20 and the control device 50. ..

As shown in FIG. 1, the plurality of detection devices 20 include a first detection sensor 21 and at least one second detection sensor 22 that detect the presence or absence of foreign matter in the space below the seat 81 of the electric lift chair 80. Including. As shown in FIG. 3, in the first embodiment of the present invention, the first detection sensor 21 is a touch sensor, and the at least one second detection sensor 22 is two, a pyroelectric sensor and a microwave sensor. It is a wave sensor.

The first detection sensor 21 is mounted on the linkage mechanism 84 in the space below the seat portion 81, and by applying a voltage to the linkage mechanism 84, an electric field is generated in the linkage mechanism 84 and the linkage mechanism 84 is said to have an electric field. The value of the capacitance of the linkage mechanism 84 is constantly measured, and when a human or an animal touches the linkage mechanism 84, the value of the capacitance changes, and the first detection sensor 21 moves to the central processing device 10. The first detection signal is transmitted. More specifically, the linkage mechanism 84 in the first embodiment of the present invention is made of a metal material, and the surface thereof is coated with a conductive paint. The two second detection sensors 22 are the seat portion 81. It is attached to the bottom of the electric lift chair 80 at intervals, and detects the presence or absence of foreign matter in the space below the seat portion 81 of the electric lift chair 80.

As shown in FIGS. 3 and 4, the plurality of elevating devices 30 are provided in the linkage mechanism 84 and are electrically driven, and the plurality of elevating devices 30 are provided with the seat portion 81 and the backrest 82, respectively. It expands and contracts in order to move the footrest 83. Specifically, in the first embodiment of the present invention, the plurality of elevating devices 30 include a first push rod 31 and a second push rod 32 for performing different functions, and the first push rod 31 is In conjunction with the linkage mechanism 84, the backrest 82 is used to tilt the backrest 82 so as to correspond to a lying posture or a sitting posture according to a user's request. The second push rod 32 is used to raise or lower the seat portion 81 or the footrest 83 in order to adjust the height to the user.

The power supply device 40 for supplying power to the pinch prevention safety device for an electric lift chair according to the present invention includes a plug 41 for connecting to a power supply outlet of a facility and a transformer connected to the plug 41. The transformer 42 converts the power from the plug 41 into direct current (DC) having a predetermined direct current voltage and supplies the power to each component of the pinch prevention safety device.

The control device 50 has buttons for raising and lowering the seat 81 and the footrest 83, tilting the backrest 82, and releasing the lock mode. The control device 50 may be a wired remote controller 51 connected to the central processing unit 10 or a wireless remote controller 52.

Further, the central processing unit 10 may have a function capable of remote communication such as Bluetooth (registered trademark), and with such a design, the central processing unit 10 may be provided via a terminal device 60 such as a mobile phone. By transmitting a wireless signal to, the pinch prevention safety device according to the present invention can be controlled as described above.

As shown in FIGS. 2 to 4, the user transmits a command signal to the central processing unit 10 via the control device 50 or the terminal device 60 to optimally adjust the electric lift chair 80 to his / her preference. Control is performed so as to adjust to the position, and when a child or a pet invades the space below the seat portion 81 and touches the linkage mechanism 84 during the adjustment, the first detection sensor 21 determines the capacitance value. The fluctuation is detected and the first detection signal is transmitted to the central processing unit 10, and the central processing unit 10 enters a lock mode for stopping the elevating device 30 to prevent a pinching accident.

Further, since the two second detection sensors 22, which are pyroelectric sensors and microwave sensors, respectively, can detect the presence of living organisms, children and pets can use the electric lift chair 80. Upon entering the space below the seat 81, the second detection sensor 22 detects it and transmits a second detection signal to the central processing unit 10, which causes the elevating device 30 to stop. Enter the lock mode. The second detection sensor 22 may further have a modulation unit for adjusting the detection range, and the second detection sensor 22 may further improve the safety of the electric lift chair 80. Two or more installation quantities of 22 may be installed.

Further, once a child, a pet, or another foreign substance enters the space below the seat portion 81 of the electric lifting chair 80 and the central processing unit 10 enters the lock mode, the plurality of lifting devices 30 expand and contract. It goes from operation to stop. After that, in order for the plurality of elevating devices 30 to perform the expansion / contraction operation again, it is first necessary to remove the obstacle in the space below the elevating device 30, and then the lock mode on the control device 50 or the terminal device 60 is set. The seat portion 81 can be continuously lowered by pressing the button for releasing the lock mode to release the lock mode and then performing the expansion / contraction operation again by the plurality of elevating devices 30.

The second embodiment of the pinch prevention safety device according to the present invention is substantially the same as the first embodiment, and the difference is that an ultrasonic sensor is simply used for the second detection sensor 22. The ultrasonic sensor continuously generates ultrasonic waves toward the lower side of the seat 81 to receive reflected waves, and measures the reflection time thereof. When an obstacle appears in the space below the seat 81, when a change in the reflection time is detected, the two second detection sensors 22 transmit a second detection signal to the central processing unit 10, and the elevating device Stop 30.

The third embodiment of the pinch prevention safety device according to the present invention is substantially the same as the first embodiment, and the difference is that the Hall effect sensor is simply used for the first detection sensor 21. The first detection sensor 21, which is a Hall effect sensor, is electrically connected to the central processing unit 10 and the power supply device 40, and is attached to one of the plurality of elevating devices 30, and the seat portion 81 is attached. It is used to detect the current value that flows when moving up and down. When an obstacle is sandwiched in the space below the seat portion 81, if the seat portion 81 is to be completely lowered, it is necessary to supply a large current to the plurality of elevating devices 30, and the current is supplied. When the current value exceeds the permissible current value, the first detection sensor 21 transmits a first detection signal to the central processing unit 10 to stop the elevating device 30.

The fourth embodiment of the pinch prevention safety device according to the present invention will be described by the first detection sensor 21 which is a Hall effect sensor having the functions as described in the third embodiment described above and the second embodiment described above. It is a combination with the second detection sensor 22 which is an ultrasonic sensor having such a function.

In the first to fourth embodiments of the pinch prevention safety device according to the present invention, the first detection sensor 21 may be a Hall effect sensor or a touch sensor, and the second detection sensor 22 is , It may be an ultrasonic sensor, a pyroelectric sensor, or a microwave sensor. Further, in order to further improve the present invention, the detection sensors 21 and 22 may be arbitrarily increased or decreased or replaced as necessary.

By the above technical means, the pinch prevention safety device for an electric lift chair of the present invention has at least the following excellent points and effects.

1. By using different types of the first detection sensor 21 and the second detection sensor 22 at the same time, even if one of the detection sensors does not operate, the other detection sensor still prevents a pinch accident. Can be prevented.

2. Since the lock mode is designed so that the user must manually release it, children and pets, or other obstacles in the space below the seat 81 are excluded. Unless confirmed, the seat 81 will not descend again.

3. Since the pinch prevention safety device according to the present invention can be controlled via a terminal device 60 such as a mobile phone, the convenience of operation for the user is improved.

The above description is merely a preferred embodiment of the present invention, and does not limit the present invention in any way. The present invention has been disclosed as described above with relatively preferred embodiments, but this is not a limitation of the present invention and, to the extent that all skilled in the art do not deviate from the technical concept of the present invention, Any simple modifications, modifications and modifications made to the above embodiments on the basis of the essence are still within the technical concept of the present invention.

10 Central processing unit 20 Detection device 21 1st detection sensor 22 2nd detection sensor 30 Lifting device 31 1st push rod 32 2nd push rod 40 Power supply device 41 Plug 42 Transformer 50 Control device 51 Wired remote control 52 Wireless remote control 60 Terminal Equipment 80 Electric lift chair 81 Seat 82 Backrest 83 Footrest 84 Linkage mechanism

Claims (10)

It is a pinch prevention safety device for electric lift chairs, and is applied to electric lift chairs including seats, backrests, and footrests, as well as a central processing unit, multiple detection devices, multiple lift devices, and electric power. Equipped with a supply device and a control device,
The plurality of detection devices include a first detection sensor and at least one second detection sensor that are electrically connected to the central processing unit and detect the presence or absence of foreign matter in the space below the seat of the electric lift chair. , The first detection sensor and at least one second detection sensor are different types of sensors.
The plurality of lifting devices are connected to the seat, backrest, and footrest so that the seat, backrest, and footrest of the electric lift chair can be moved, respectively.
The power supply device is electrically connected to the central processing unit,
The control device is electrically connected to the central processing unit and is used to transmit a command signal to the central processing unit.
When the first detection sensor detects a foreign object, it transmits a first detection signal to the central processing unit, whereby the central processing unit enters a lock mode in which the movement of the plurality of elevating devices is stopped.
When the at least one second detection sensor detects a foreign object, it transmits a second detection signal to the central processing unit, whereby the central processing unit enters a lock mode in which the movement of the plurality of elevating devices is stopped. A pinch prevention safety device for electric lift chairs that is characterized by being able to enter. The plurality of elevating devices
A first push rod used to incline the backrest of the electric lift chair,
The pinch prevention safety device for an electric lift chair according to claim 1, further comprising a second push rod used for raising and lowering the seat portion of the electric lift chair. The pinch prevention safety device for an electric lift chair according to claim 2, wherein the first detection sensor is a touch sensor attached to the linkage mechanism of the electric lift chair. The electric lifting chair according to claim 2, wherein the first detection sensor is a Hall effect sensor attached to the plurality of lifting devices so as to be electrically connected to the central processing unit and the power supply device. For pinch prevention safety device. The electric lift chair according to claim 3 or 4, wherein the at least one second detection sensor is a pyroelectric type sensor or a microwave sensor attached to the bottom of the seat portion of the electric lift chair. For pinch prevention safety device. The pinch prevention safety for an electric lift chair according to claim 3 or 4, wherein the at least one second detection sensor is an ultrasonic sensor attached to the bottom of the seat portion of the electric lift chair. apparatus. The electric lift chair according to claim 5, wherein the control device is a wired remote controller connected to the central processing unit by wiring and has a button for releasing the plurality of lift devices from the lock mode. A safety device to prevent pinching. The electric lift chair according to claim 6, wherein the control device is a wired remote controller connected to the central processing unit by wiring and has a button for releasing the plurality of lift devices from the lock mode. A safety device to prevent pinching. The sandwiched electric lift chair according to claim 5, wherein the control device is a wireless remote controller connected to the central processing unit and has a button for releasing the plurality of lift devices from the lock mode. Preventive safety device. The sandwiched electric lift chair according to claim 6, wherein the control device is a wireless remote controller connected to the central processing unit and has a button for releasing the plurality of lift devices from the lock mode. Preventive safety device.

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