Patent Description:
Commode chair is a chair which allows user to go to the toilet directly beside the bed and is very convenient. Commode chair can also be carried for outdoor travel to avoid the situation that one cannot promptly go to the toilet due to long distance. The commode chair does not need to be flushed and is convenient and portable. With the update and development of technology, the existing commode chair can automatically package and collect excrement for heat sealing, thereby solving the problems of being unhygienic, highly infective, and difficult in bag replacement. For example, <CIT> discloses a heat sealing assembly, the transmission unit of which uses a motor gear to drive a synchronous wheel to move so that the heat sealing assembly exerts the function of heat sealing in a transmission manner. However, since the transmission unit needs to move for a long distance and a long time to achieve the closing, and the overall cost of the transmission unit is relatively high, the further application of the trash container is limited. Due to the high frequency of automatic packaging and collection of the trash container, using this transmission mode requires relatively high energy consumption. Replacing this unit with a range-extending mechanism can achieve the effect of energy-saving, thereby reducing energy consumption and cost. In view of the foregoing problems, the present application designs a trash bag closing mechanism.

<CIT> discloses an automatic packaging and bag changing garbage can, having a bag feeding mechanism, a lifting mechanism and a packaging mechanism for automatic bag changing and automatic packaging of garbage bags. <CIT> discloses a garbage packaging machine for medical postoperative dirt. <CIT> discloses a bag-opening heat-sealing device where symmetrically arranged heat-sealing knives are adopted to conduct heat-sealing on a contracted bag opening. <CIT> discloses a flushing-free toilet structure and a fixed and lifting-type flushing-free toilet system.

The present invention provides a trash bag closing mechanism, a commode chair and control method thereof, which can effectively solve the above problems.

The present invention is implemented as follows:
A trash bag closing mechanism used in a commode chair includes:.

The power unit is used to drive the scissor-hinge unit to expand and contract, which consequently drives the first guide plate to slide toward the second guide plate to effect the closing and opening of the trash bag.

The power unit comprises a second motor (<NUM>) and a first gear (<NUM>) connected to the second motor (<NUM>); the scissor-hinge unit (<NUM>) comprises a fixing member (<NUM>), a guide groove (<NUM>) arranged on the fixing member (<NUM>), a first rack (<NUM>) received in the guide groove (<NUM>) and meshed with the first gear (<NUM>) , and a scissor hinge (<NUM>) connected to the first rack (<NUM>).

The scissor hinge (<NUM>) comprises <NUM> to <NUM> scissor sets, and the length of each scissor set increases along the direction away from the first rack (<NUM>).

A control method for the package-type commode chair includes the following steps:.

The present invention has the following advantages:
The present application includes a transmission assembly including a power unit and a scissor-hinge unit; a first guide plate arranged on the scissor-hinge unit; a second guide plate arranged opposite to the first guide plate; the power unit is used to drive the scissor-hinge unit to expand and contract, which consequently drives the first guide plate to slide toward the second guide plate to effect the closing and opening of the trash bag; a heat sealing assembly arranged on the first guide plate and/or the second guide plate and used for heat sealing a closed trash bag. The range-extending effect of the transmission is effected through the scissor-hinge unit, reducing the energy consumption of operation and achieving the effect of energy saving.

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation on the scope. Those skilled in the art can also obtain other related drawings based on these drawings without creative work.

In order to make the purposes, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the embodiments described herein are some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention. Accordingly, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention, but merely represents selected embodiments of the present invention.

Referring to <FIG>, a commode chair capable of closing a trash bag includes: a commode chair body <NUM> which includes a trash bag receiving port, a discharge port and a collection device <NUM> which is arranged on the lower part of the commode chair body <NUM>. The collection device <NUM> includes: a trash bag fixing unit <NUM> which is used to provide a hollow trash bag <NUM>; a bag feeding unit <NUM> which is arranged at the bottom of the trash bag fixing unit <NUM> and used to clamp two sides of the trash bag <NUM> and deliver the trash bag <NUM> downwards; and a trash bag closing mechanism which includes a transmission assembly <NUM>, a closing assembly <NUM>, and a heat sealing assembly <NUM>. The transmission assembly <NUM> includes a power unit <NUM> and a scissor-hinge unit <NUM>. The closing assembly <NUM> includes a first guide plate <NUM> arranged on the scissor-hinge unit <NUM> and a second guide plate <NUM> arranged opposite to the first guide plate <NUM>. The heat sealing assembly <NUM> is arranged at the bottom of the closing assembly <NUM> and used to seal the trash bag <NUM>. The commode chair can effect functions such as automatic bag feeding, automatic collection, automatic packaging, and heat sealing of excrement. In addition, the commode chair capable of closing the trash bag is portable and suitable for use outdoors or by children and middle-aged and elderly people.

As shown in <FIG>, the trash bag fixing unit <NUM> includes: a hollow column <NUM> which is used to support the hollow trash bag <NUM>; a chassis <NUM> which extends outward from the bottom of the hollow column <NUM> horizontally and is fixed on the commode chair body <NUM>; and a ring-shaped cover <NUM> covering the top of the hollow column <NUM>. One end of the trash bag <NUM> passes around the ring-shaped cover <NUM> from the outer side of the hollow column <NUM> and enters the inner side of the hollow column <NUM>. The chassis <NUM> further includes a surrounding side <NUM> arranged upward along the edge of the chassis <NUM> vertically, so that the trash bag <NUM> will not move outward during use. The present device can support bag in another way without using the trash bag fixing unit <NUM>. A folded soft bag is set in an annular groove of the base of the mechanism, and the ring-shaped cover <NUM> covers on the annular groove. Preferably, the height of the surrounding side <NUM> is <NUM>-<NUM>. In the present embodiment, the height of the surrounding side <NUM> is <NUM>. The other end of the hollow column <NUM> extends inwardly to form an engaging ring <NUM>; the ring-shaped cover <NUM> further includes an engaging portion <NUM> matched with the engaging ring <NUM>. Ribs <NUM> are uniformly and vertically arranged on the side wall of the hollow column <NUM>. The trash bag fixing unit <NUM> further includes a sensor <NUM> arranged on the surface of the chassis <NUM> close to the ring-shaped cover <NUM> for detecting the supply status of the trash bag <NUM>. Preferably, the thickness of the material for the trash bag <NUM> is <NUM>-<NUM>; more preferably, the thickness of the material for the trash bag <NUM> is <NUM>-<NUM>. In the present embodiment, the thickness of the material for the trash bag <NUM> is <NUM>.

Referring to <FIG>, the bag feeding unit <NUM> includes: a first motor <NUM>; a first gear set <NUM> connected to the first motor <NUM>; a transmission shaft <NUM> arranged on the first gear set <NUM>; a second gear set <NUM> connected to the transmission shaft <NUM> and symmetrical to the first gear set <NUM>, each gear set including a driving gear and a driven gear that cooperates with the driving gear; and a bag feeding wheel set <NUM> symmetrically arranged on the first gear set <NUM> and the second gear set <NUM>, each bag feeding wheel set <NUM> including a first driving wheel <NUM> arranged on the driving gear and a first driven wheel <NUM> arranged on the driven gear, and the first driving wheel <NUM> and the first driven wheel <NUM> in each bag feeding wheel set <NUM> being tangent. The first driving wheel <NUM> and the first driven wheel <NUM> are arranged on the same plane. The bag feeding unit <NUM> further includes a gear installation housing <NUM> receiving the first gear set <NUM> and the second gear set <NUM>, respectively. The torsion spring assembly <NUM> includes a straight notch <NUM> arranged at the end of the gear installation housing away from the driving gear, the first driven wheel <NUM> passes through the straight notch <NUM> via a rotating shaft <NUM> to connect to the driven gear, and the rotating shaft <NUM> is sleeved with an arc-shaped stopper <NUM>. A torsion spring <NUM> is arranged below the rotating shaft <NUM>, and the torsion spring <NUM> abuts against the arc-shaped stopper <NUM> to achieve a small displacement of the first driven wheel <NUM> to fix the trash bag <NUM>. The gear installation housing <NUM> also includes a torsion spring stopper <NUM> arranged below the straight notch <NUM>. One end of the torsion spring <NUM> abuts against the torsion spring stopper <NUM>, and the other end abuts against the arc-shaped stopper <NUM>. In the process of setting bag, since a bag setting correction device is needed to tightly clamp one end of the trash bag <NUM> in the bag feeding wheel set <NUM>, the design of the bag feeding unit <NUM> enables the driven gear to effect a small downward displacement, so that a gap is formed between the first driving wheel <NUM> and the first driven wheel <NUM> to allow the entry of the bag setting correction device therein. That is, the trash bag <NUM> is placed in the bag feeding wheel set <NUM>, the bag setting correction device is then removed, the torsion spring <NUM> drives the first driven wheel <NUM> to reset, and the bag feeding wheel set <NUM> clamps the trash bag <NUM> tightly.

The replacement of the trash bag <NUM> of the present invention is as follows. After the trash bag <NUM> is used, the ring-shaped cover <NUM> is removed from the hollow column <NUM>, a new trash bag <NUM> is taken and set on the hollow column <NUM>, and then the ring-shaped cover <NUM> covers on the hollow column <NUM>. One end of the trash bag <NUM> is pulled up from the outer side of the hollow column <NUM> to pass around the ring-shaped cover <NUM> and enter the inner side of the hollow column <NUM>. The bag setting correction device is used to place one end of the trash bag <NUM> together in the bag feeding wheel set <NUM> and then removed for normal use. When a soft bag is used, the ring-shaped cover <NUM> is removed from the base of the mechanism, the soft bag is set in the annular groove of the mechanism, and then the ring-shaped cover <NUM> covers. The soft bag is pulled up to pass around the ring-shaped cover and placed in the bag feeding wheel set <NUM> for fixation.

Referring to <FIG>, a trash bag closing mechanism include:.

The power unit <NUM> is used to drive the scissor-hinge unit <NUM> to expand and contract, which consequently drives the first guide plate <NUM> to slide toward the second guide plate <NUM> to effect the closing and opening of the trash bag <NUM>.

The power unit <NUM> includes a second motor <NUM> and a reducer (not labeled in the figure) connected to the second motor <NUM>. In the present embodiment, the second motor <NUM> is preferably a direct current (DC) motor, which is for the purpose of reducing the cost. The second motor <NUM> is connected to the first gear <NUM>. The scissor-hinge unit includes a fixing member <NUM>, and the fixing member <NUM> is provided with a guide groove <NUM>. A first rack <NUM> can be slidably connected to the guide groove <NUM>, the first gear <NUM> meshes with the first rack <NUM>, and the first rack <NUM> is connected to a scissor hinge <NUM>. The end of the fixing member <NUM> away from the first gear <NUM> is provided with a smooth wheel <NUM>. The smooth wheel <NUM> abuts against the first rack <NUM> to make the first rack <NUM> run more stably and prevent the first rack <NUM> from jumping vertically under force, which avoids unsmooth movement or decelerates the wear of the first rack <NUM>. In other embodiments, the first rack is further fixed by using a gear. At this time, meshing teeth are arranged on both sides of the first rack <NUM> and the stability of the first rack <NUM> is increased by using a two-way gear fixing mode. The scissor hinge <NUM> includes: <NUM> to <NUM> scissor sets, and the length of each scissor set increases along the direction away from the first rack <NUM>. Preferably, the scissor hinge <NUM> includes: <NUM>-<NUM> scissor sets. This is because on the one hand, if the number is too small, the range extending is not obvious, and the bag cannot be effectively closed; on the other hand, if the number is too large, the mechanism is prone to being unstable. In one of the embodiments, the scissor hinge <NUM> includes: <NUM> scissor sets. Specifically, the scissor hinge <NUM> includes: a first scissor set 2323a which includes two first scissor arms 2323a1. One end of the first scissor arm 2323a1 is rotatably arranged on the first rack <NUM>;
a second scissor set 2323b includes two second scissor arms 2323b1 intersected, and the second scissor arms 2323b1 are each provided with a second through hole 2323b2 at the intersection. One end of each second scissor arm 2323b1 is rotatably connected to the other end of each first scissor arm 2323a1, respectively. The fixing member <NUM> further includes a first bolt <NUM> passing through the second through hole 2323b2, so that the second scissor arms 2323b1 can swing around the first bolt <NUM> to extend the range. The second through hole 2323b2 is provided at the end of the second scissor arm 2323b1 close to the first scissor set 2323a, and the second scissor arm 2323b1 is divided into a second front scissor arm 2323b11 and a second rear scissor arm 2323b12, that is, the length of the second front scissor arm 2323b11 is less than that of the second rear scissor arm 2323b12. At this time, the first rack <NUM> is moved to make the angle A between the second front scissor arms 2323b11 and the angle B between the second rear scissor arms 2323b12 equal. Since the length of the second front scissor arm 2323b11 is less than that of the second rear scissor arm 2323b12, according to the triangle theorem, the horizontal movement distance of the second rear scissor arm 2323b12 is greater than that of the second front scissor arm 2323b11 to effect the range-extending effect. When the first bolt <NUM> fixes the second through hole 2323b2, the stability of the scissor hinge <NUM> is significantly improved. A third scissor set 2323c includes two third scissor arms 2323c1 intersected and a second bolt 2323c3, and the third scissor arms 2323c1 are each provided with a third through hole 2323c2 at the intersection. One end of each third scissor arm 2323c1 is rotatably connected to the other end of each second scissor arm 2323b1, respectively, and the second bolt 2323c3 passes through the third through hole 2323c2. The third scissor arm exerts the function of conduction, and multiple third scissor sets 2323c can be set. In the present embodiment, one third scissor set 2323c is set.

A fourth scissor set 2323d includes two fourth scissor arms 2323d1 intersected and a third bolt 2323d3, and the fourth scissor arms 2323d1 are each provided with a fourth elongated through hole 2323d2 at the intersection. One end of each fourth scissor arm 2323d1 is rotatably connected to the other end of each third scissor arm 2323c1, respectively, and the third bolt 2323d3 passes through the fourth elongated through hole 2323d2. According to the principle of scissor hinge, in order to achieve the rotational connection between the end of the fourth scissor arm 2323d1 away from the third scissor set 2323c and the first guide plate <NUM> and increase the movement stability of the scissor hinge <NUM>, the fourth elongated through hole 2323d2 is set to effect the angle change between the fourth scissor arms 2323d1 to allow the movement of the scissor hinge <NUM>. The fourth scissor arm 2323d1 also has a limit function to limit the movement of the scissor hinge <NUM> within the length range of the fourth elongated through hole 2323d2. The stability of the scissor hinge <NUM> ensures the stability of reciprocating movement. In the present invention, the length of each scissor set of the scissor hinge <NUM> increases along the direction away from the first rack <NUM>, which reflects the range-extending effect of the transmission assembly <NUM>, reduces the rotation of the second motor <NUM> in each closing process, and achieves the effect of energy saving.

As shown in <FIG>, the closing assembly <NUM> includes the first guide plate <NUM> arranged on the scissor-hinge unit <NUM> and the second guide plate <NUM> arranged opposite to the first guide plate <NUM>. The first guide plate <NUM> slides toward the second guide plate <NUM> to close the trash bag. Both the first guide plate <NUM> and the second guide plate <NUM> have a double-layer structure. The first guide plate <NUM> includes an upper clamping sheet <NUM> and a lower clamping sheet <NUM>. The second guide plate <NUM> is provided with an upper clamping sheet guide groove <NUM> and a lower clamping sheet guide groove <NUM> which are respectively adapted to the upper clamping sheet <NUM> and the lower clamping sheet <NUM>. The upper clamping sheet <NUM> is slidably connected to the upper clamping sheet guide groove <NUM> to effect the closing of the upper part of the trash bag, and the lower clamping sheet <NUM> can be slidably connected to the lower clamping sheet guide groove <NUM> to effect the closing of the lower part of the trash bag, so as to more accurately seal the trash bag <NUM>. The sealing stability of the trash bag is improved by the guiding function of the first guide plate <NUM> and the second guide plate <NUM>. A guide shaft <NUM> is provided in a positioning hole, a first spring set <NUM> is arranged at the end of the guide shaft <NUM> close to the first guide plate <NUM>, and a second spring set <NUM> is arranged at the end of the guide shaft <NUM> close to the second guide plate <NUM>. In the initial state, the scissor-hinge unit <NUM> and the power unit <NUM> are in a stress state, the first guide plate <NUM> compresses the first spring set <NUM>. When the power unit <NUM> drives the scissor-hinge unit <NUM> to extend out, the first guide plate <NUM>, under the biasing force of the first spring set <NUM>, tightly pushes the second guide plate <NUM> to eliminate the movement caused by the gap between the scissor-hinge unit <NUM>, so that the scissor-hinge unit <NUM> remains in a stable state during operation. If the gap is not eliminated by the first spring set <NUM>, the scissor-hinge unit <NUM> will not move unless the gap between the scissor-hinge unit <NUM> is eliminated by movement when the power unit <NUM> starts. In other words, the movement of the scissor-hinge unit <NUM> will lag behind, resulting in unsmooth movement of the scissor-hinge unit <NUM> and affecting the transmission of the equipment. When the first guide plate <NUM> contacts the second guide plate <NUM>, the second guide plate <NUM> compresses the second spring set <NUM> to resist the force of the heat sealing assembly. After the heat sealing is completed, the power unit <NUM> drives the scissor-hinge unit <NUM> to retract, and the second spring set <NUM> tightly pushes the second guide plate <NUM> to assist in discharge.

Referring to <FIG>, in one of the embodiments, the heat sealing assembly <NUM> includes: a first heat-sealing knife <NUM> and a second heat-sealing knife <NUM> opposite to the first heat-sealing knife <NUM>. The second heat-sealing knife is configured to move, driven by the transmission assembly <NUM>, toward the first heat-sealing knife <NUM> to achieve the heat sealing of a closed trash bag. Each heat-sealing knife includes a heat-sealing knife base <NUM> and a heat-sealing blade <NUM> vertically connected to the heat-sealing knife base <NUM>. The first heat-sealing knife base <NUM> is arranged between the upper clamping sheet guide groove <NUM> and the lower clamping sheet guide groove <NUM> of the first guide plate <NUM>. The second heat-sealing knife base is fixed between the upper clamping sheet <NUM> and the lower clamping sheet <NUM> of the second guide plate <NUM>. The heat sealing device further includes a heating wire (not shown in the figure), and the heating wire is arranged on the inner side of the heat-sealing knife base <NUM>.

The advantages of using the present invention are as follows: The use of soft bag or the trash bag fixing unit <NUM> allows the convenient use and quick replacement of the trash bag <NUM>. The symmetrically arranged bag feeding unit <NUM> permits synchronous bag feeding on both sides, ensuring the consistency of the movement of the trash bag <NUM>. The closing assembly <NUM> allows the closing of the trash bag after a single use of the commode chair. The heat sealing assembly <NUM> achieves the heat sealing of the trash bag <NUM> being closed, completes the heating sealing and packaging of the trash bag <NUM>, and prevents the excrement from overflowing. Further, in the present invention, the range-extending effect of the transmission assembly <NUM> is achieved because the length of each scissor set of the scissor hinge <NUM> increases along the direction away from the first rack <NUM>, which reduces the rotation of the second motor <NUM> during each sealing process and achieves the effect of energy saving. Moreover, this transmission mode of the present invention can also greatly reduce the overall cost compared to the existing mode. Further, the sealing stability of the trash bag is increased through the guiding functions of the first guide plate <NUM>, the second guide plate <NUM>, and the guide shaft <NUM>, and the first guide plate <NUM> is tightly pushed by the first spring set <NUM> to eliminate the movement caused by the gap between the scissor-hinge unit <NUM>, so that the scissor-hinge unit <NUM> remains in a stable state during operation. The second spring set <NUM> is used to resist the force of the heat sealing assembly <NUM> to prevent the excessive large force of the heat sealing assembly <NUM> from melting the opening of the trash bag, which avoids breakage and odor escaping from the trash bag <NUM>. After the heat sealing is completed, the power unit <NUM> drives the scissor-hinge unit <NUM> to retract, and the second spring set <NUM> tightly pushes the second guide plate <NUM> to prevent the heat-sealed trash bag <NUM> from adhering to the second guide plate to assist in discharge.

The present invention also includes a control method for a commode chair capable of closing a trash bag, including the following steps:.

Referring to <FIG>, the present embodiment is basically the same as Embodiment <NUM> except that the power unit <NUM> includes a first cylinder <NUM> connected to the second scissor set 2323b; the second scissor arm 2323b1 further includes a fifth through hole 2323b13 arranged at the end of the second front scissor arm 2323b11 away from the second through hole <NUM>, where the fifth through hole 2323b13 of one second scissor arm 2323b1 is connected to the first cylinder <NUM>, and the first bolt <NUM> passes through the fifth through hole 2323b13 of the other second scissor arm 2323b1 to improve the stability of the scissor hinge <NUM>. In the present embodiment, the structure of the transmission assembly <NUM> is simplified, and the scissor hinge <NUM> is driven due to the stability of the first cylinder <NUM>, which avoids problems such as unstable transmission and poor sealing effect caused by the large matching tolerance of the first rack <NUM>.

As shown in <FIG>, the present embodiment is different from the above trash bag closing mechanism embodiments in that a foldable support stand assembly <NUM> is provided at the bottom of the commode chair body <NUM>. The support stand assembly <NUM> includes four mounting bases <NUM> arranged on the rectangular bottom plate of the commode chair body <NUM>. The four mounting bases <NUM> are symmetric about the symmetric axis of the bottom plate of the commode chair body <NUM>. Each mounting base <NUM> is internally provided with a stand accommodating recess <NUM> which extends through the mounting base <NUM> to a sidewall at an end of the axis of width direction. The stand accommodating recess <NUM> is internally provided with a fixation rod <NUM> at an end proximal to an opening of the stand accommodating recess <NUM>. The stand accommodating recess <NUM> is internally provided with a first limiting rod <NUM> and a second limiting rod <NUM> at an end proximal to the bottom plate of the commode chair body <NUM>. The fixation rod <NUM>, first limiting rod <NUM>, and second limiting rod <NUM> are arranged in parallel, and the second limiting rod <NUM> is arranged in proximal to the end of the axis of width direction.

The support stand assembly <NUM> further includes two support stands <NUM>, each support stand <NUM> is arranged in a pair of mounting bases <NUM> that are symmetrical about an axis of length direction. The support stand <NUM> is integrally formed by bending a round tube. The support stand <NUM> includes a support part <NUM> and mounting parts <NUM> arranged at two ends of the support part <NUM>. The mounting parts <NUM> are symmetrical about the support part <NUM>. Through holes 322a having an elongate slot shape are arranged on the sidewall of the mounting parts <NUM>. The diameter of the fixation rod <NUM> is smaller than the width of the through hole 322a. The fixation rod <NUM> is arranged in the through hole 322a to enable the support stand <NUM> to rotate about the fixation rod <NUM>, so as to achieve the function of folding and unfolding the support stand <NUM>. Inside the tube wall of each mounting part <NUM>, a limiting spring <NUM> is provided. One end of the limiting spring <NUM> abuts a tail end of the mounting part <NUM>, and another end of the limiting spring <NUM> abuts the fixation rod <NUM>. Under the action of the limiting spring <NUM>, the fixation rod <NUM> is slidable inside the through hole 322a with elongate slot shape. The rectangular bottom plate of the commode chair body <NUM> is provided with four clamps <NUM>, and the clamps <NUM> are configured to secure the tube wall of the mounting parts <NUM>. When the support stand <NUM> is folded up, the clamps can secure the tube wall of the mounting parts <NUM> and the support stand <NUM> cannot rotate anymore, so as to achieve the folding and securing of the support stand <NUM> and facilitate the remove of the commode chair. When the commode chair is to be used, the support stand <NUM> is detached from the clamps <NUM>, then the limiting spring <NUM> is compressed to make the fixation rod <NUM> slide to a side of the through hole 322a proximal to the tail end of the mounting part <NUM>, such that the tail end of the mounting part <NUM> rotates to pass through a space between the first limiting rod <NUM> and an end proximal to the opening of the stand accommodating recess <NUM>. Afterwards, the limiting spring <NUM> is reset, and the fixation rod <NUM> slides to a side of the through hole 322a away from the tail end of the mounting part <NUM>. The mounting part <NUM> is secured between the first limiting rod <NUM> and the second limiting rod <NUM>, the tube diameter of the mounting part <NUM> is equal to the distance between the first limiting rod <NUM> and the second limiting rod <NUM>. The two support stands <NUM> prop up the commode chair body <NUM>. The installation and configuration of the support stand assembly <NUM> can facilitate the remove and storage of the commode chair.

As shown in <FIG>, the present embodiment is different from the above trash bag closing mechanism embodiments in that a fordable support stand assembly <NUM> is provided at the bottom of the commode chair body <NUM>. The support stand assembly <NUM> includes mounting brackets <NUM> which are symmetrically arranged on the rectangular bottom plate of the commode chair body <NUM>. The mounting brackets <NUM> are arranged at a side of the rectangular bottom plate proximal to a cover plate of the commode chair. The mounting brackets <NUM> are symmetric about an axis of length direction of the rectangular bottom plate. Each mounting bracket <NUM> is provided with a first stand sleeve <NUM> in hinge connection. The first stand sleeve <NUM> is slidably connected around a first stand <NUM>. The first stand <NUM> is a tubular structure with a U-shaped cross section. The first stand sleeves <NUM> of the mounting brackets <NUM> are connected around the tube wall of the first stand <NUM> at two sides. The bottom part of the first stand <NUM> is configured to support the commode chair, and the top part of the first stand <NUM>, namely, the opening of the U-shaped structure, is connected with a second stand sleeve <NUM> in sleeve manner. The second stand sleeve <NUM> is slidably connected with a second stand <NUM>. The second stand <NUM> is a tubular structure with a closed loop shape. The second stand <NUM> includes a connecting end <NUM> and a support end <NUM> arranged in opposite to the connecting end <NUM>. The second stand sleeve <NUM> sleeves around the connecting end <NUM> of the second stand <NUM>. The wall of the tube between the connecting end <NUM> and the support end <NUM> is provided with through holes for connecting the rectangular bottom plate of the commode chair body <NUM> at an end away from the mounting brackets <NUM> by bolts, and the second stand <NUM> is rotatable about the bolts.

When the support stand assembly <NUM> is in folded state, the connecting end <NUM> and support end <NUM> of the second stand <NUM> are located at the same height. At this time, the first stand sleeve <NUM> slid to an end proximal to the second stand sleeve <NUM>, the first stand <NUM> is parallel to the ground plane, and the commode chair is propped up by the connecting end <NUM> and the support end <NUM> of the second stand <NUM>. When the commode chair is to be unfold, the second stand <NUM> rotates about the bolts and the connecting end <NUM> moves toward the cover plate of the commode chair. The second stand sleeve <NUM> rotates to make the first stand sleeve <NUM> slide to an end away from the second stand sleeve <NUM>, and the first stand <NUM> follows the rotation. The tube wall at two sides of the first stand <NUM> are provided with limiting pins <NUM>. When the first stand sleeve <NUM> abuts the limiting pin <NUM>, the bottom part of the first stand <NUM> and the support end <NUM> of the second stand <NUM> serve as supporting points and prop up the whole commode chair. The installation and configuration of the support stand assembly <NUM> can facilitate the remove and storage of the commode chair.

As shown in <FIG>, the present embodiment is different from the above trash bag closing mechanism embodiments in that the power unit <NUM> includes an installation component <NUM> fixed on the commode chair. The installation component <NUM> is a detachable installation casing. A third motor <NUM> is transversely disposed at a side close to the top of the installation component <NUM>, and the third motor <NUM> is connected to a speed reducer (not labelled in the drawing). In the present embodiment, preferably, the third motor <NUM> is a DC motor, the use of the DC motor can reduce cost, and since the DC motor has reduction gear box which has fixed reduction ratio, the output speed is fixed, by controlling the operation time of the motor through PCB, the number of rotation turns can be controlled, and by controlling the input current of the motor, the output torque can be controlled. The third motor <NUM> is configured to drive a second gear <NUM> in the installation component <NUM>, and the second gear <NUM> is engaged with a third gear <NUM>. The installation component <NUM> is provided with a positioning groove <NUM> below the third gear <NUM>. A second rack <NUM> is accommodated in the positioning groove <NUM>, and the second rack <NUM> is engaged with the third gear <NUM>. The second rack <NUM> is connected to the scissor-hinge unit <NUM>. The configuration that the third motor <NUM> is transversely disposed at a side close to the top of the installation component <NUM> facilitates the wiring of the device, and the configuration that the second rack <NUM> is located below the third gear <NUM> can reduce the height of the installation component <NUM>, such that the structure is more compact, the volume of the commode chair is reduced, it is more convenient to move the commode chair at night and easier to carry the commode chair outdoors or during traveling, and the bag feeding distance of the bag feeding unit <NUM> can be shortened, thus reducing energy consumption. An angle A formed by a line connecting the center of the second gear <NUM> and the center of the third gear <NUM> and the ground plane ranges <NUM>-<NUM>°. In the present embodiment, the angle A formed by the line connecting the center of the first gear <NUM> and the center of the second gear <NUM> and the ground plane is <NUM>°. In order to facilitate wiring, the third motor <NUM> should be positioned near the top of the installation component <NUM>, if a single gear is used to engage with a rack, collision may be caused between the bag feeding unit <NUM> and the trash bag closing mechanism. Accordingly, in the present embodiment, two gears engaged with each other are used to drive the scissor-hinge unit <NUM> to move, which can reduce friction caused by mechanical movement. In order to reduce the height of the installation component <NUM> and make the structure of the bag feeding unit <NUM> and trash bag closing mechanism more compact, when the angle A formed by the line connecting the center of the second gear <NUM> and the center of the third gear <NUM> and the ground plane is <NUM>°, in the present embodiment, the overall height of the bag feeding unit <NUM> is <NUM>, the height of the first guide plate <NUM> is <NUM>, the overall height of the fixing member <NUM> is <NUM>, the distance between the bottom of the bag feeding unit <NUM> and the top of the first guide plate <NUM> is <NUM>. In the previous configuration, the overall height of the bag feeding unit <NUM> is <NUM>, the height of the first guide plate <NUM> is <NUM>, the overall height of the installation component <NUM> is <NUM>, the distance between the bottom of the bag feeding unit <NUM> and the top of the first guide plate <NUM> is <NUM>. Compared with the previous configuration, the configuration of the present embodiment can effectively reduce the height of the installation component <NUM> by <NUM>, and the distance between the bag feeding unit <NUM> and the trash bag closing mechanism is short, such that the structure is more compact, energy consumed by the bag feeding unit during the feeding of the bag can be reduced, the volume can be reduced, and it is more convenient to move.

As shown in <FIG>, the sidewall of the positioning groove <NUM> is provided with a limiting block 23311a, and the second rack <NUM> is provided with a limiting groove 2335a matched with the limiting block 23311a. The limiting block 23311a is slidably connected with the limiting groove 2335a. The bottom of the second rack <NUM> is symmetrically provided with two limiting steps 2335b, and the bottom of the positioning groove <NUM> is provided with step grooves 23311b matched with the limiting steps 2335b. The limiting steps 2335b are slidably connected with the step grooves 23311b. In the prior art of the trash bag closing mechanism, in order to let the second rack <NUM> move stably, a smooth wheel is provided above the second rack <NUM>, the smooth wheel abuts against the second rack <NUM> so as to prevent the second rack <NUM> from jumping vertically under force. However, the smooth wheel may get stuck or interfered during operation, which would render the movement of the second rack <NUM> not going smoothly. To avoid this situation, in the present disclosure, the smooth wheel is replaced with two symmetrically arranged limiting steps 2335b located at the bottom of the second rack <NUM>, the connection between the limiting steps 2335b and the step grooves 23311b can make the operation smoother and prevent the second rack <NUM> from jumping vertically under force.

As shown in <FIG>, in the present embodiment, the transverse arrangement of the third motor <NUM> can facilitate wiring of the commode chair. The battery assembly <NUM> may be installed inside the hollow column <NUM>. The battery assembly <NUM> includes a battery installation housing <NUM> installed at a lower end of the hollow column <NUM>. In the present embodiment, the battery installation housing <NUM> is an integrally molded plastic casing. The use of plastic casing can reduce cost. Since the battery is relatively light, the plastic casing made of PC material can make sure that the battery installation housing <NUM> has enough installation strength. The battery installation housing <NUM> includes battery accommodating groove <NUM>, the battery <NUM> is installed in the battery accommodating groove <NUM>. Two ends of the battery accommodating groove <NUM> are provided with installation parts <NUM> for being fixed on the bottom of the hollow column <NUM>. The installation parts <NUM> are fixed on the hollow column <NUM> by bolts, the battery assembly <NUM> is configured inside the hollow column <NUM>, such that the overall structure of the commode chair is more compact and the volume of the commode chair is reduced.

As shown in <FIG>, the present invention further provides a trash container, including:.

The shape and structure of the trash container body <NUM> are not limited and can be selected according to actual needs. For example, it may be a cuboid, a cube, or the like. In one of the embodiments, the trash container body <NUM> is a cuboid, and the trash bag receiving port is set at the top of the cuboid, and the discharge port is set on the side wall of the cuboid (not shown in the figure).

A control method for a trash container includes the following steps:.

Further, the trash bag closing mechanism further includes a heat sealing assembly which is arranged on the first guide plate <NUM> and/or the second guide plate <NUM>, and the control method further includes:
S60: heat sealing through the range-extending trash bag closing mechanism.

Claim 1:
A trash bag closing mechanism, comprising:
a transmission assembly (<NUM>) comprising a power unit (<NUM>) and a scissor-hinge unit (<NUM>);
a closing assembly (<NUM>) comprising a first guide plate (<NUM>) arranged on the scissor-hinge unit (<NUM>) and a second guide plate (<NUM>) arranged opposite to the first guide plate (<NUM>); and
a heat sealing assembly (<NUM>) arranged on the first guide plate (<NUM>) and/or the second guide plate (<NUM>)) and used for heat sealing a closed trash bag (<NUM>);
wherein the power unit (<NUM>) is used to drive the scissor-hinge unit (<NUM>) to expand and contract, which consequently drives the first guide plate (<NUM>) to slide toward the second guide plate (<NUM>) to effect the closing and opening of the trash bag (<NUM>); characterised in that:
the power unit comprises a second motor (<NUM>) and a first gear (<NUM>) connected to the second motor (<NUM>); the scissor-hinge unit (<NUM>) comprises a fixing member (<NUM>), a guide groove (<NUM>) arranged on the fixing member (<NUM>), a first rack (<NUM>) received in the guide groove (<NUM>) and meshed with the first gear (<NUM>) , and a scissor hinge (<NUM>) connected to the first rack (<NUM>); and wherein the scissor hinge (<NUM>) comprises <NUM> to <NUM> scissor sets, and the length of each scissor set increases along the direction away from the first rack (<NUM>).