JP3245044U - Electric chair that prevents pinching - Google Patents

Abstract

An object of the present invention is to provide an electric chair that prevents pinching. A power chair for preventing pinching includes a base, a control module, a link mechanism, and a foot support base, the link mechanism is movably provided on the base and connected to a driver, and the foot support is The control module is pivotally mounted on the linkage and includes a control unit and a sensor set, the control unit electrically connecting with the driver and the sensor set. Under normal conditions, the foot support operates simultaneously with the linkage when the linkage is expanded or retracted. When the foot support hits an obstacle, the foot support pivots relative to the linkage, and when the sensor set detects that the foot support pivots relative to the linkage, the control unit activates. Stopping the operation of the device or controlling the expansion of the link mechanism prevents the occurrence of pinching, thereby preventing dangers such as babies and pets getting caught. [Selection diagram] Figure 1

Description

TECHNICAL FIELD The present invention relates to a power chair, and particularly to a power chair that prevents pinching.

An electric chair is powered by electric power and provides the user with the most comfortable sitting experience by adjusting the angle and position of components such as a backrest, a seat surface, and a foot support. Among them, the foot support is operated by a drive mechanism using electric power, and when in use, it is raised to rest the user's feet, and when not in use, it is folded downward and stored, thereby reducing the space occupied by the electric chair.

However, when the foot support of the electric chair is in the raised state, if an object (such as a basketball) gets under the foot support, the foot support will pinch the object when the foot support is folded and stored. As a result, the folding operation of the foot support by the drive mechanism may not work properly, and the drive mechanism may be damaged. Additionally, if an infant or pet accidentally puts a limb under the foot support or crawls under it, the infant or pet may become trapped in the foot support or related mechanisms, posing a danger.

In view of the above-mentioned problems, the present invention provides an electric chair that prevents the driving mechanism from being damaged and reduces the danger due to objects being caught when the foot support is folded and stored. The purpose is to

In order to achieve the above objectives, this invention
An electric chair that prevents pinching,
base and
a link mechanism movably provided on the base and connected to a driver;
at least one foot support base pivotably mounted on the linkage;
a control module including a control unit and at least one sensor set, the control unit being electrically connected to the driver and the sensor set, and controlling expansion or retraction of the linkage by the driver; The foot support base pivots relative to the linkage when the linkage is retracted, and the sensor set detects that the foot support base pivots relative to the linkage. The present invention has proposed an electric chair that prevents entrapment, wherein the control unit controls deactivation of the drive device or deployment of the link mechanism upon detecting this.

According to the present invention, the following excellent effects can be achieved.
1. When folding the foot support when there is an obstacle below the foot support, the actuator can trigger Controls the deactivation of the foot support or the expansion of the link mechanism, so that the link mechanism continues to fold even when an object is caught in the foot support, thereby preventing its structure from being destroyed. Even if your dog or pet puts their hands or feet under the foot support or crawls under it, you can avoid a dangerous situation caused by getting caught.
2. The entrapment prevention electric chair of the present invention may further include a warning unit, and when the control module detects that an obstacle is entrapment, the control unit controls the deactivation of the driver or the deployment of the link mechanism. Additionally, the alarm unit can be set to emit a sound to notify the user of the presence of an obstacle.

FIG. 2 is a schematic side view showing the internal structure of an embodiment of the present invention. FIG. 3 is a side view showing a contracted state of the link mechanism according to the embodiment of the present invention. FIG. 3 is a side operational view showing the expanded state of the link mechanism according to the embodiment of the present invention. FIG. 2 is a side view showing a link set and a foot support set according to an embodiment of the present invention. FIG. 1 is a perspective external view showing a link set and a foot support set according to an embodiment of the present invention. FIG. 3 is an exploded view showing members of an arm and a foot support base according to an embodiment of the present invention. FIG. 3 is an exploded view of the arm and foot support members according to the embodiment of the present invention, viewed from another direction; FIG. 3 is an exploded view showing sensor sets according to an embodiment of the present invention installed at different positions on an arm and a foot support base; FIG. 2 is a circuit block diagram of an embodiment of the present invention. FIG. 2 is a schematic side view showing a state in which an article is caught when the link mechanism of the electric chair shown in FIG. 1 is folded. 11 is a side operational view showing a state in which the foot support base shown in FIG. 10 pivots relative to the arm; FIG.

In order to understand the technical features and effects of the present invention in detail and to implement the present invention based on its contents, preferred embodiments shown in the drawings will be described in detail below.

As shown in FIGS. 1 and 9, the electric chair for preventing pinching according to the embodiment of the present invention includes a base 10, a link mechanism 20, a control module 50, a driver 60, two foot support sets 80, and a chair body 90. and two foot supports 91, the electric chair is arranged on a plane (for example, the ground) via a base 10, a link mechanism 20 is movably arranged on the base 10, and two foot supports 91 are provided on the link mechanism 20. The support set 80 is arranged, the chair main body 90 is arranged on the base 10, two foot supports 91 are connected to the chair main body 90, and are configured to be attached to the two foot support sets 80 respectively, so that the user can can place their feet on each of the two foot supports 91. The control module 50 is electrically connected to a driver 60, and the driver 60 is connected to the linkage 20, and the control module 50 allows the linkage 20 to be connected to the base 10 as shown in FIGS. 2 and 3. As a result, the two foot support sets 80 operate synchronously according to the operation of the link mechanism 20, and the foot support 91 can be folded or raised.

As shown in FIGS. 2 and 3, the linkage 20 includes two link sets 21, which are located at the distal ends of the linkage 20 and connected via other link members at the front end of the linkage 20. By being connected to the driver 60, it is driven by the driver 60. The driver 60 is an electric push rod, and the two foot support sets 80 are provided on the two link sets 21, respectively. Note that the detailed configuration in which the link set 21 is connected to the driver 60 via another link member at the front end of the link mechanism 20 belongs to the prior art related to electric chairs, so the details are not shown in the drawings. A detailed explanation will be omitted and will not be explained here. The combination of one link set 21 and the corresponding foot support set 80 will be described below.

As shown in FIGS. 2 to 5, the link set 21 includes two arms 22, a first link 23 and two second links 24, and the two arms 22 are a first arm 22A and a second arm 22A connected to each other. It consists of an arm 22B, two second links 24 are arranged apart from each other, one end of the two second links 24 is pivotally connected to the first link 23, and the other end of the two second links 24 is connected to the first link 23. It is pivotally connected to arm 22A. That is, the first link 23, the two second links 24, and the first arm 22A constitute one four-link mechanism. The four-link mechanism is connected to a link member at the front end of the link mechanism 20 via a first link 23 and one second link 24, and is accordingly expanded or contracted.

As shown in FIGS. 4 and 5, the foot support set 80 includes a foot support base 30 and an elastic member 40, and as shown in FIGS. 5 to 7, the foot support base 30 is pivotably attached to the link set 21. Specifically, the foot support base 30 is pivotally connected to the second arm 22B, and a foot support base 30 is provided to fix the foot support 91 to the foot support base 30 as shown in FIG. A plurality of positioning holes are formed. The elastic member 40 is coupled to the first arm 22A and the foot support base 30, and as shown in FIGS. 6 and 7, an installation hole 223 is formed in the first arm 22A and an engagement hole is formed in the foot support base 30. 31 is formed, the elastic member 40 is an elastic spring, one end of the elastic member 40 is engaged with the installation hole 223, and the other end of the elastic member 40 is engaged with the engagement hole 31.

In a normal state, as shown in FIGS. 2 and 3, when the link set 21 contracts or expands due to operation, it is restricted by the elastic member 40, so the foot support base 30 pivotally connected to the second arm 22B is linked. It operates with the operation of the set 21, but does not pivot with respect to the link set 21, so that the foot support 91 fixed to the foot support base 30 can be folded or raised.

As another condition, as shown in FIG. 10, when the link set 21 is folded and the foot support 91 is accommodated, if there is an obstacle S (for example, a basketball) below the foot support 91, the foot support 91 When hit, the foot support 91 and the foot support base 30 to which the foot support 91 is fixed are stopped by the obstacle S, but the link mechanism 20 is driven by the driver 60 and the link set 21 continues to contract. In such a situation, the foot support base 30 pivots and expands with respect to the second arm 22B, as shown in FIG. 11, and at the same time, the elastic member 40 is pulled accordingly. With such a configuration, the control module 50 can detect the pivoting of the foot support base 30 with respect to the second arm 22B and control the electric chair.

Specifically, as shown in FIG. 9, the control module 50 includes a control unit 51 and two sensor sets 52, and the control unit 51 is electrically connected to the two sensor sets 52 and a driver 60, and the control module 50 includes a control unit 51 and two sensor sets 52. Each sensor set 52 corresponds to two foot support sets 80, and the sensor set 52 can use a photoelectric sensor, and the photoelectric sensor is provided on the second arm 22B, and the photoelectric sensor is provided on the second arm 22B. When the foot support base 30 pivots, the change in light caused by the second arm 22B is no longer blocked, and this is converted into a change in an electrical signal, and the control unit 51 controls the driver 60 according to the change in the electrical signal. can be controlled.

In other embodiments, the sensor set 52 may use a magnetic element and a reed switch provided on the foot support base 30 and the second arm 22B, respectively, so that the foot support base 30 is attached to the second arm 22B. Upon pivoting, the movement of the magnetic element relative to the reed switch causes a circuit to break or conduct, creating a current change that allows the control unit 51 to control the driver 60 . In yet another embodiment, the sensor set 52 may include one of a micro switch, a membrane switch, a tact switch, and a pressure sensor, and the sensor set 52 may include one of a micro switch, a membrane switch, a tact switch, and a pressure sensor, When the foot support base 30 pivots, the control unit 51 can control the driver 60 by causing a contact or disengagement action by the sensor set 52 .

In yet another embodiment, the sensor set 52 can improve detection accuracy by combining two or more of photoelectric sensors, reed switches, microswitches, membrane switches, tactile switches, and pressure sensors according to needs. can be done. In addition, if the sensor set 52 adopts a microswitch, a tact switch, or other element to be contacted, as shown in FIG. 7, by providing the sensor set 52 on the top surface 225 of one of the second arms 22B, The foot support base 30 is brought into contact with the sensor set 52. Further, when the sensor set 52 employs a photoelectric sensor, as shown in FIG. 8, by providing the sensor set 52 on one side 226 of the second arm 22B, the foot support base 30 can pivot relative to the second arm 22B. When the light changes, a change in light can be detected. Note that the specific installation position of the sensor set 52 can be determined according to the operating principle of the elements used, so it is not limited thereto.

Since the photoelectric sensor, reed switch, microswitch, membrane switch, tactile switch, and pressure sensor described above are conventional technologies, detailed explanation thereof will be omitted here. In another embodiment, if it is possible to detect that the foot support base 30 is pivoted relative to the second arm 22B, and the control unit 51 can control the driver 60 accordingly, the sensor set 52 can be used as a foot support base. The sensor set 52 may also be provided on the base 30 and/or the first arm 22A and may use other sensing methods and is not limited to the preferred embodiment of the present invention.

When the sensor set 52 detects that the foot support base 30 has pivoted relative to the second arm 22B, the control unit 51 transmits an electric signal to the driver 60 to stop the operation of the driver 60 or to stop the link. The driver 60 is controlled to actuate the mechanism 20 in the opposite direction, thereby stopping the retracting motion of the linkset 21 or redeploying it so that the linkset 21 continues to retract and the foot Since the obstruction S below the support base 30 and the foot support 91 is prevented from being pinched, the electric chair that prevents pinching of the present invention is such that the foot support 91 folds up when there is an obstacle below the foot support 91. When the movement is started, it can be detected in real time and the linkage mechanism 20 can be operated in the opposite direction to redeploy it, which can prevent structural damage to the linkage mechanism 20 and also protect infants and pets. Even if a person puts his or her hands or feet under the foot support 91 or crawls under the foot support 91, a dangerous situation due to being caught can be avoided.

Furthermore, as shown in FIG. 9, in a preferred embodiment of the present invention, the power chair for preventing entrapment is electrically connected to the control unit 51 of the control module 50, and the sound is controlled by the control unit 51. It further includes a warning unit 71 that issues a warning, and specifically, the warning unit 71 is a buzzer, a speaker, or the like. According to this configuration, when the sensor set 52 detects that the foot support base 30 has pivoted with respect to the second arm 22B, the control unit 51 controls the driver 60 to stop the operation of the link set 21. At the same time, the warning unit 71 is controlled to emit a buzzer sound to notify the user of the presence of the obstacle S.

As shown in FIGS. 6 and 7, in the preferred embodiment of the present invention, each arm 22 is provided with a pivot part 221 and an extension part 222, and the first arm 22A and the second arm 22B are provided with a pivot part 221 and an extension part 222. The two second links 24 are pivoted to the extension part 222 of the first arm 22A, and the foot support base 30 is pivoted to the extension part 222 of the second arm 22B. It is pivoted. As a result, when an external force is applied to the foot support 91, the foot support base 30 pivots relative to the second arm 22B as shown in FIG. 11, as described above. Further, the sensor set 52 is provided on the extension portion 222 of the second arm 22B.

As shown in FIGS. 5 to 7, in a preferred embodiment of the present invention, the extending portion 222 is bent and extended from the pivot portion 221, and the first arm 22A and the second arm 22B are connected to each other. The extending portions 222 are spaced apart, that is, the first arm 22A and the second arm 22B have a fork-like structure. Further, the foot support base 30 includes a base plate 301 and a side plate 302, of which the side plate 302 is pivotally attached to the extension portion 222 of the second arm 22B, and the base plate 301 and the side plate 302 are provided perpendicularly to each other. , is provided so as to straddle above the extending portion 222 of the first arm 22A and the second arm 22B, and the elastic member 40 is disposed between the extending portion 222 of the first arm 22A and the extending portion 222 of the second arm 22B. At the same time, an installation hole 223 and an engagement hole 31, into which both ends of the elastic member 40 are respectively engaged, are provided in the pivot portion 221 of the first arm 22A and the base plate 301, respectively. By aligning the two arms 22 of the fork-like structure with the structure spanning the base plate 301, it is possible to prevent the elastic member 40 from tilting too much and to prevent interference with other mechanisms when the elastic member 40 is elastically deformed. Since it becomes difficult to use, the service life can be extended.

As shown in FIGS. 2, 3, and 9, in the preferred embodiment of the present invention, the electric chair for preventing pinching has a mechanism for detecting whether an object has accidentally entered the base 10. , further includes a sensor member 11 spaced apart inside the base 10 , and the sensor member 11 is electrically connected to a control unit 51 of the control module 50 . Incidentally, the sensor member 11 can employ a photoelectric sensor, and if a pet, infant, or other object accidentally enters the base 10 while the electric chair is in a stationary state, the photoelectric sensor detects a change in light. From the detection, it is possible to know that an object has accidentally entered the object, and when a change in the electrical signal occurs, the control unit 51 controls the driver 60 so as not to operate, even if the related operation button is pressed. Since the electric chair does not operate even when the electric chair is in operation, the control unit 51 prevents an object that has accidentally entered the base 10 from being caught, and also controls the warning unit 71 to prevent an object from accidentally entering the base 10. Make a buzzer sound to notify the user.

To explain in more detail, the base 10 is provided with two symmetrical base rods, and the sensor member 11 can employ a laser equipped with a time of flight (ToF) detection method. According to this, when a laser is emitted from one base rod of the base 10 and reaches the other base rod, it is reflected back to the original location and received, by utilizing the time difference between transmission and reception. The distance between the two base rods of the base 10 can be determined, and if an object accidentally falls between the two base rods, the change in distance will be detected by the sensor member 11 and the control unit will respond accordingly. 51 controls the driver 60.

On the other hand, in other embodiments, a light shielding sensor may be adopted as the sensor member 11. According to this configuration, if an object accidentally enters between the two base rods of the base 10, the object will be removed from the sensor member 11. Since the sensor member 11 blocks the light irradiated from one base rod to the other base rod, the presence of an object can be detected by the sensor member 11. In other embodiments, if the electric chair includes at least one sensor member 11, it is possible to detect that an object accidentally enters the base 10, but the number of sensor members 11 is limited. It can be determined according to needs and is not limited to the preferred embodiment of the present invention.

In other embodiments, a stop plate connected to the chair body 90 may be provided between the storage positions of the two link sets 21, and the stop plate also prevents objects from being accidentally dropped. It can also have the effect of preventing it from entering the base 10.

10 Base 11 Sensor member 20 Link mechanism 21 Link set 22 Arm 22A First arm 22B Second arm 221 Pivot part 222 Extension part 223 Installation hole 225 Top surface 226 Side surface 23 First link 24 Second link 30 Foot support base 301 Base Plate 302 Side plate 31 Engagement hole 40 Elastic member 50 Control module 51 Control unit 52 Sensor set 60 Driver 71 Warning unit 80 Foot support set 90 Chair body 91 Foot support S Obstacle

Claims (10)

An electric chair that prevents pinching,
base and
a link mechanism movably provided on the base and connected to a driver;
at least one foot support base pivotably mounted on the linkage;
a control module including a control unit and at least one sensor set, the control unit being electrically connected to the driver and the sensor set, and controlling expansion or retraction of the linkage by the driver; The foot support base pivots relative to the linkage when the linkage is retracted, and the sensor set detects that the foot support base pivots relative to the linkage. An electric chair that prevents entrapment, characterized in that the control unit controls deactivation of the driver or deployment of the link mechanism by detecting this. including at least one elastic member;
The electric chair as claimed in claim 1, wherein the elastic member is coupled to the foot support base and the link mechanism. The link mechanism includes two arms, a first arm and a second arm, the first arm is connected between the driver and the second arm, and the elastic member is coupled to the first arm. 3. The foot support according to claim 2, wherein the foot support is pivotally attached to the second arm so as to be pivotable relative to the second arm and the first arm. An electric chair that prevents pinching. Each of the arms includes a pivot portion and an extension portion, the two arms are pivoted to each other by the pivot portion, the extension portions of the two arms are spaced apart, and the elastic member The foot support base includes a base plate that is located between the extending parts of the arms, and the base plate extends across the extending parts of the two arms, and opposite ends of the elastic member are respectively connected to the base plate. The electric chair for preventing pinching according to claim 3, wherein the electric chair is coupled to a pivot joint of the first arm. The electric chair for preventing pinching according to any one of claims 2 to 4, wherein the elastic member is an elastic spring. at least one sensor member, the sensor member is provided inside the base to detect whether an object has entered the base, and the sensor member is a control unit of the control module. The electric chair for preventing pinching according to any one of claims 1 to 4, characterized in that the electric chair is electrically connected to the electric chair. The electric chair that prevents pinching according to claim 6, wherein the sensor member is a photoelectric sensor or a light shielding sensor. The electric chair for preventing entrapment according to claim 5, further comprising a warning unit electrically connected to the control unit of the control module and emitting a sound under the control of the control unit. The device for preventing pinching according to any one of claims 1 to 4, further comprising a warning unit electrically connected to a control unit of the control module and emitting a sound under the control of the control unit. electric chair. Pincer according to any one of claims 1 to 4, characterized in that the sensor set includes at least one of a photoelectric sensor, a reed switch, a microswitch, a membrane switch, a tactile switch, a pressure sensor. Electric chair to prevent.