CN211410035U

CN211410035U - Seat occupation preventing mechanism

Info

Publication number: CN211410035U
Application number: CN201921131532.3U
Authority: CN
Inventors: 吴景华; 聂金双; 吕守熙
Original assignee: Fuan Rovos Fitness Co ltd
Current assignee: Fujian Glory Health Technology Co ltd
Priority date: 2019-07-18
Filing date: 2019-07-18
Publication date: 2020-09-04
Anticipated expiration: 2029-07-18

Abstract

The utility model discloses a seat occupation preventing mechanism, which comprises a back frame and a seat occupation preventing lifting frame; the back frame is crooked shape, prevents to account for the middle part of seat lifting frame and rotates the one end of connecting at the human shank of back frame contact, prevents to account for the one end of seat lifting frame and buckles to one side of back frame indent. The utility model belongs to the technical field of the seat structure is prevented accounting for by the massage armchair, the utility model aims to solve among the prior art consumer not consume and occupy the problem that commercial massage armchair had a rest. The technical effects achieved are as follows: effectively preventing the consumer from occupying the commercial massage chair to have a rest without consuming.

Description

Seat occupation preventing mechanism

Technical Field

The embodiment of the utility model provides a massage armchair prevents accounting for a technical field of seat structure, concretely relates to prevent accounting for a mechanism for prevent that unpaid consumer can't normally sit in.

Background

Because of the popularization of the existing commercial massage armchair, the paid massage armchair appears in a plurality of public places, but the situation that the massage armchair is not consumed and used but occupied for having a rest in the public places can occur, and the loss is caused to merchants, so that how to prevent the people who do not consume from occupying the seat for a long time is an important problem for solving the benefit improvement of the commercial massage armchair.

The existing seat occupation preventing device uses a double push rod to push and lift, the cost of the function is high, and the seat occupation preventing device can hardly be maintained once being damaged.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a prevent accounting for a seat mechanism to solve among the prior art consumer not consume and occupy the problem that commercial massage armchair had a rest.

In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:

according to a first aspect of an embodiment of the present invention, an anti-seating mechanism includes a back portion and an anti-seating lifting frame; the back frame is crooked shape, prevents to account for the middle part of seat lifting frame and rotates the one end of connecting at the human shank of back frame contact, prevents to account for the one end of seat lifting frame and buckles to one side of back frame indent.

Further, the base frame and the anti-occupation push rod are further included; the back side of the concave surface in the back frame is arranged on the base frame through a roller slide rail mechanism; the other end of the anti-occupation seat lifting frame is bent to one side of the back frame, which is connected with the seat frame, and is hinged with the telescopic end of the anti-occupation seat push rod, and the fixed end of the anti-occupation seat push rod is fixed on the seat frame.

Furthermore, the anti-occupation seat lifting frame comprises a first supporting arm plate, a second supporting arm plate, a rotating shaft sleeve, a first lifting plate and a second lifting plate; the two ends of the rotating shaft sleeve are rotatably connected to one end, contacting with legs of a human body, of the back frame, a first lifting plate and a second lifting plate are fixed to the two ends of the rotating shaft sleeve, the upper surfaces of the first lifting plate and the second lifting plate are located in the same plane, the first lifting plate and the second lifting plate are arranged on one side, recessed in the back frame, of the back frame, the first lifting plate and the second lifting plate are used for pushing out two thigh lower sides of the human body when sitting on the massage chair respectively, the first supporting arm plate and the second supporting arm plate are fixed to the middle of the rotating shaft sleeve, the first supporting arm plate and the second supporting arm plate are arranged at intervals and are parallel to each other, and one end, far away from the rotating shaft sleeve, of the first supporting arm plate and the.

Further, still include a plurality of support arm connecting rods, the both ends of a plurality of support arm connecting rods are equallyd divide and are fixed respectively on first support arm board and second support arm board, prevent occupying between first support arm board and the second support arm board the hinged end of the push rod of seat push rod.

Furthermore, the upper surface of the first lifting plate is provided with a first inductive switch groove in a downward sunken mode, the upper surface of the second lifting plate is provided with a second inductive switch groove in a downward sunken mode, and the first inductive switch groove and the second inductive switch groove are both used for placing a switch for driving the anti-occupation push rod to start.

Further, the base frame includes bottom support and two vertical supports, and the bottom support level sets up subaerial, and two equal vertical fixation of vertical support are on the bottom support, and two vertical supports are parallel to each other and the interval sets up, and the dorsal part of the concave surface passes through gyro wheel slide rail mechanism and sets up on two vertical supports in the back frame, and the back frame sets up in the space between two vertical supports.

Further, still include zero gravity push rod, rotate the connecting plate and support the horizontal pole, the stiff end of zero gravity push rod articulates on the bottom support, supports the horizontal pole and transversely sets up between two vertical supports, and the both ends of supporting the horizontal pole rotate with two vertical supports respectively and are connected, and the middle part of rotating the connecting plate is fixed at the middle part of supporting the horizontal pole, and the one end of rotating the connecting plate is articulated with the flexible end of zero gravity push rod, and the other end of rotating the connecting plate is articulated with the stiff end of preventing occupying a push rod.

Further, the zero gravity push rod is any one of an electric push rod, a hydraulic cylinder or an air cylinder.

Further, the anti-occupation seat push rod is any one of an electric push rod, a hydraulic cylinder or an air cylinder.

Furthermore, the back frame comprises a backrest frame and a seat frame, the backrest frame and the seat frame are connected with each other, the connection part is in smooth transition, the included angle between the plane where the seat frame is located and the plane where the backrest frame is located is 119-133 degrees, and the rotating shaft sleeve is rotatably connected to one end, far away from the backrest frame, of the seat frame.

Furthermore, when the telescopic end of the seat occupation preventing push rod extends to the limit position, the first lifting plate and the second lifting plate are abutted against the seat frame.

The utility model has the advantages of as follows: through the utility model discloses, the effectual consumer that has prevented from not consuming the action that occupies commercial massage armchair rest, just the utility model discloses a prevent accounting for a mechanism simple structure, prevent accounting for a effectual, when the consumer does not consume and occupies the massage armchair for a long time, can in time release it, the utility model discloses a prevent that accounting for a mechanism intensity is higher, and is not fragile, easy maintenance and maintenance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a structural diagram of an anti-seating mechanism according to some embodiments of the present invention.

Fig. 2 is a front view structural diagram of an anti-seating mechanism according to some embodiments of the present invention.

Fig. 3 is a structural diagram of an anti-occupation iron stand in an anti-occupation mechanism according to some embodiments of the present invention.

Fig. 4 is a state diagram of an un-activated anti-seating mechanism according to some embodiments of the present invention.

Fig. 5 is a starting state diagram of an anti-seating mechanism according to some embodiments of the present invention.

In the figure: 1. back frame, 2, prevent accounting for a lifting frame, 3, the rotation axle sleeve, 4, the base frame, 5, prevent accounting for a push rod, 6, zero gravity push rod, 7, the rotation connecting plate, 8, support horizontal pole, 9, the bottom support, 10, vertical support, 11, first arm board, 12, the second arm board, 13, the support arm connecting rod, 14, first lifting board, 15, the second lifting board, 16, first inductive switch groove, 17, the second inductive switch groove, 18, the back frame, 19, the seat frame.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1

As shown in fig. 1 and fig. 2, the seat occupation preventing mechanism in the present embodiment includes a back frame 1 and a seat occupation preventing lifting frame 2; the back frame 1 is bent, and the middle part of the seat-occupying lifting frame 2 is prevented from rotating and being connected to one end of the back frame 1 contacting with the legs of the human body, and one end of the seat-occupying lifting frame 2 is prevented from being bent to one side of the back frame 1 which is concave inwards.

The back frame 1 is connected to the base frame 4 in a sliding mode, the driving device is arranged on the base frame 4 and used for driving the anti-occupation lifting frame 2 to rotate forwards and backwards at the rotating connection position of the back frame 1, and the driving device adopts any one of belt transmission, gear transmission, chain transmission, an electric push rod, a hydraulic oil cylinder or an air cylinder; when the driving device adopts belt transmission, the driving motor is fixed on the base frame 4, a belt wheel is fixed at a rotating shaft of the anti-occupation seat lifting frame 2, and the anti-occupation seat lifting frame is driven to rotate forwards and reversely through the belt transmission; when the driving device adopts gear transmission, the driving motor is fixed on the base frame 4, a gear is fixed at a rotating shaft of the anti-occupation seat lifting frame 2, and the anti-occupation seat lifting frame is driven to rotate forwards and reversely through the gear transmission; when the driving device adopts chain transmission, the driving motor is fixed on the base frame 4, a chain wheel is fixed at the rotating shaft of the anti-occupation lifting frame 2, and the anti-occupation lifting frame is driven by the chain transmission to rotate positively and reversely; when the driving device is an electric push rod, the fixed end of the driving device refers to the motor end of the electric push rod, and the telescopic end refers to the push rod end of the electric push rod; when the anti-occupation seat push rod 5 is a hydraulic oil cylinder, the fixed end of the anti-occupation seat push rod refers to the cylinder body end of the hydraulic oil cylinder, and the telescopic end refers to the free end of a telescopic lever of the hydraulic oil cylinder; when the driving device is an air cylinder, the fixed end of the driving device refers to the cylinder body end of the air cylinder, and the telescopic end refers to the free end of a telescopic lever of the air cylinder; when the driving device is a nut screw pair, the fixed end of the driving device refers to the fixed end of the screw, the fixed end of the screw is rotationally connected to the driving motor, the telescopic end refers to the nut end, and the outer side wall of the nut is connected with one end, bent to the side, connected with the base frame 4, of the back frame 1, of the anti-occupation seat lifting frame 2; in addition, the lifting frame also comprises other driving structures for driving the anti-occupation seat lifting frame 2 to rotate.

Example 2

As shown in fig. 1 and fig. 2, the anti-occupation mechanism in this embodiment includes a base frame 4, a back frame 1, an anti-occupation push rod 5, and an anti-occupation lifting frame 2; the back frame 1 is in a bending shape, the bending shape of the back frame is matched with the radian between the back and the legs of a human body sitting on the massage chair, for example, the back frame 1 comprises two curved brackets connected by a cross bar, the two curved brackets are respectively positioned at the left side and the right side of the human body, the distance between the two brackets is larger than the width of the human body, the back side of the concave surface in the back frame 1 is arranged on the base frame 4 through a roller sliding rail mechanism, the concave surface of the back frame 1 refers to the side of the back frame 1 close to the human body when the human body sits on the massage chair, the roller sliding rail mechanism refers to that the outer sides of the two brackets of the back frame 1 are respectively and rotatably connected with rollers, two crossed sliding rail structures are arranged on the vertical side surfaces of the base frame 4, which are positioned at the two sides of the back frame 1, and the back frame 1 is respectively connected in the two crossed sliding rail structures in a sliding manner through rollers, so that the back frame 1 can swing on the base frame 4; prevent accounting for a mechanism that seat lifting frame 2 is similar L shape, the corner of its L shape is for preventing accounting for a middle part of seat lifting frame 2, prevent accounting for a middle part of seat lifting frame 2 and rotate the one end of connecting at the human shank of back frame 1 contact, prevent accounting for one end of seat lifting frame 2 and buckle to one side of back frame 1 indent, prevent accounting for the other end of seat lifting frame 2 and buckle to one side that back frame 1 is connected with base frame 4 and with prevent accounting for a flexible end hinge of push rod 5, prevent accounting for a stiff end of push rod 5 and fix on base frame 4, be provided with the inductive switch that the human body of response accounts for a long time on the upper portion of preventing accounting for a seat lifting frame 2.

As shown in fig. 4, when a human body just sits on the massage chair, the inductive switch of the anti-occupation seat is in a closed state, the anti-occupation seat push rod 5 is not started, the telescopic end of the anti-occupation seat push rod 5 is in an extending state, and one end of the anti-occupation seat lifting frame 2, which is positioned on the concave surface of the back frame 1, abuts against the surface of the back frame 1, which is positioned below the buttocks and thighs of the human body; when a human body sits on the massage chair for a long time and occupies the seat, the induction switch is started, at the moment, the seat occupation preventing push rod 5 is started, the seat occupation preventing push rod 5 retracts, the seat occupation preventing lifting frame 2 is driven to rotate around the rotating center of the seat occupation preventing lifting frame, as shown in fig. 5, one end, located below the hip and the thigh of the human body, of the seat occupation preventing lifting frame 2 is lifted upwards, and the human body is pushed out.

The technical effect that this embodiment reaches does: through this embodiment, through preventing accounting for a push rod 5 promotion and preventing accounting for a rotation of lifting frame 2, effectually prevented that the consumer from not consuming the action of occuping commercial massage armchair rest, just the utility model discloses a prevent accounting for a simple structure of mechanism, prevent accounting for a effectual, when the consumer does not consume and occupies massage armchair for a long time, can in time release it, this embodiment prevent accounting for a mechanism intensity higher, and is not fragile, easy maintenance and maintenance.

Example 3

As shown in fig. 1 and 3, an anti-seizing mechanism in the present embodiment includes all the technical features of embodiment 2, and in addition, the anti-seizing seat lifting frame 2 includes a first arm plate 11, a second arm plate 12, a rotating sleeve 3, a first lifting plate 14 and a second lifting plate 15; the two ends of the rotating shaft sleeve 3 are rotatably connected with one end of the back frame 1 contacting with the legs of the human body, the rotating connection mode can be that a rotating shaft is arranged in the rotating shaft sleeve 3, the rotating shaft is connected with the rotating shaft sleeve 3 through a sliding bearing or a rolling bearing, or the two ends of the rotating shaft sleeve 3 are respectively provided with a bearing to be connected with the back frame 1, the two ends of the rotating shaft sleeve 3 are fixedly provided with a first lifting plate 14 and a second lifting plate 15, the upper surfaces of the first lifting plate 14 and the second lifting plate 15 are positioned in the same plane, the first lifting plate 14 and the second lifting plate 15 are both arranged on one side of the back frame 1 which is concave inwards, the first lifting plate 14 and the second lifting plate 15 are respectively used for pushing out the lower sides of two thighs when the human body sits on the massage chair, the first lifting plate 14 and the second lifting plate 15 are both made of steel plates, the first supporting arm plate 11 and the second supporting arm plate 12 are both fixed in the middle part of the rotating, the first supporting arm plate 11 and the second supporting arm plate 12 are arranged at intervals and are parallel to each other, one ends, far away from the rotating shaft sleeve 3, of the first supporting arm plate 11 and the second supporting arm plate 12 are hinged with the telescopic end of the anti-occupation seat push rod 5, as shown in fig. 2, the first supporting arm plate 11 and the second supporting arm plate 12 are both formed by cutting steel plates, the side surfaces of the first supporting arm plate and the second supporting arm plate are bent, and the bent parts of the first supporting arm plate and the second supporting arm plate bend towards one side close to the anti-occupation seat push rod; still include a plurality of support arm connecting rods 13, support arm connecting rod 13 can be made for circular steel pipe or rectangle steel pipe, the both ends of a plurality of support arm connecting rods 13 are equallyd divide and are do not fixed on first arm board 11 and second arm board 12 through welded mode, the hinged end of the push rod of preventing accounting for a push rod 5 is located between first arm board 11 and the second arm board 12, the hinged mode is for having seted up the round hole on first arm board 11 and second arm board 12, wear to be equipped with the round pin axle in the round hole, the round pin axle passes and prevents accounting for a telescopic tip round hole of push rod 5.

In some specific embodiments, the upper surface of the first lifting plate 14 is provided with a first inductive switch groove 16 in a downward concave manner, the upper surface of the second lifting plate 15 is provided with a second inductive switch groove 17 in a downward concave manner, both the first inductive switch groove 16 and the second inductive switch groove 17 are used for placing a switch for driving the anti-occupation seat push rod 5 to start, the switch can be a contact switch, and when a human body is pressed when sitting down, the switch is in contact conduction.

The beneficial effects in this embodiment are: the first lifting plate 14 and the second lifting plate 15 are arranged, so that the left thigh and the right thigh of a human body can be jacked up respectively, the whole anti-occupation seat lifting frame 2 is simple in structure and light in weight, the driving force required by the anti-occupation seat lifting plate is reduced, the power requirement of the anti-occupation seat push rod 5 is reduced, the human body can be pushed out stably, and the legs of the human body are not uncomfortable when pushed out; the first arm supporting plate 11 and the second arm supporting plate 12 are connected through the supporting connecting rod, so that the connecting strength of the first arm supporting plate and the second arm supporting plate is enhanced, and the left-right shaking phenomenon of the seat occupation preventing lifting plate caused by the fact that the push rod extends out is reduced; the first inductive switch groove 16 is formed in the first lifting plate 14, and the second inductive switch groove 17 is formed in the second lifting plate 15, so that the inductive switches are approximately flush with the upper surfaces of the first lifting plate 14 and the second lifting plate 15, and the legs and the buttocks of a human body can not feel uncomfortable when the human body sits down.

Example 4

As shown in fig. 1 to 3, the anti-occupation mechanism in this embodiment includes all the technical features of embodiment 3, in addition to that, the base frame 4 includes a bottom frame 9 and two vertical frames 10, for example, the bottom frame 9 is a square structure formed by welding a plurality of rectangular steel pipes, each vertical frame 10 includes two vertical steel pipes, a first sliding rail and a second sliding rail are welded to the upper ends of the vertical steel pipes in an inclined manner, the first sliding rail and the second sliding rail are inclined in a cross manner, sliding grooves on the first sliding rail and the second sliding rail face a horizontal direction, sliding grooves on the first sliding rail on both sides of the back frame 1 face each other, similarly, sliding grooves on the second sliding rail on both sides of the back frame 1 face each other, the bottom frame 9 is horizontally arranged, the two vertical frames 10 are both vertically fixed on the bottom frame 9 on the ground, the two vertical frames 10 are mutually parallel and spaced, the back side of the concave surface in the back frame 1 is arranged on the two vertical supports 10 through a roller slide rail mechanism, for example, the back frame 1 is connected in a first slide rail and a second slide rail in a rolling way through rollers arranged on the left vertical side and the right vertical side of the back frame 1, and the back frame 1 is arranged in a space between the two vertical supports 10; still include zero gravity push rod 6, rotate connecting plate 7 and support horizontal pole 8, the stiff end of zero gravity push rod 6 articulates on bottom support 9, support horizontal pole 8 and transversely set up between two vertical supports 10, the both ends of supporting horizontal pole 8 rotate with two vertical supports 10 respectively and are connected, the middle part of rotating connecting plate 7 is fixed at the middle part of supporting horizontal pole 8, the one end of rotating connecting plate 7 is articulated with the flexible end of zero gravity push rod 6, the other end of rotating connecting plate 7 is articulated with the stiff end of preventing occupying seat push rod 5.

Optionally, the zero-gravity push rod 6 is any one of an electric push rod, a hydraulic cylinder or an air cylinder; the anti-occupation seat push rod 5 is any one of an electric push rod, a hydraulic cylinder or an air cylinder.

The beneficial effects in this embodiment are: through setting up base frame 4 to the connected mode of bottom support 9 and vertical support 10, base frame 4's low in manufacturing cost, and simple structure, better support intensity has, through setting up two criss-cross slip tracks on vertical support 10, back frame 1 has been realized rocking on two vertical supports 10, when the people sits on back frame 1, back frame 1 can rock to the comfortable angle of human body around, through the setting of zero gravity push rod 6, realized promoting the human body to zero gravity state, comfort level when making the human body use the massage armchair is showing and is promoting.

Example 5

As shown in fig. 1 and fig. 2, the anti-occupation mechanism of the present embodiment includes all the technical features of embodiment 4, in addition, the back frame 1 includes a back frame 18 and a seat frame 19, wherein the back frame 18 is a portion contacting the back of the human body, the seat frame 19 is a portion contacting the hip and thigh of the human body, the back frame 18 and the seat frame 19 are connected with each other and the connection is in smooth transition, the included angle between the plane where the seat frame 19 is located and the plane where the back frame 18 is located is 119 ° to 133 °, i.e. the angle between the back and the leg of the human body is limited within the range of plus or minus 7 ° of 126 °, and the rotating shaft sleeve 3 is rotatably connected to one end of the seat frame 19 away from the back frame 18; as shown in fig. 4, when the telescopic end of the anti-occupation push rod 5 extends to the limit position, both the first lifting plate 14 and the second lifting plate 15 abut against the seat frame 19.

The beneficial effects in this embodiment are: by limiting the angle between the backrest frame 18 and the seat frame 19 to 119-133 degrees, the body and the legs are at an obtuse angle of 126 degrees plus or minus 7 degrees, so that the pressure of the lower body is uniformly distributed on the whole body, the lung capacity is improved, the heart is relieved, the breath is smoother, the comfort of zero gravity is generated for the human body, and the sitting posture pressure is relieved or even completely eliminated.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

Claims

1. An anti-seat-occupation mechanism is characterized by comprising a back frame (1) and an anti-seat-occupation lifting frame (2); back frame (1) is crooked shape, the middle part of preventing accounting for a lifting frame (2) rotates to be connected back frame (1) contacts the one end of human shank, the one end of preventing accounting for a lifting frame (2) is buckled to one side of back frame (1) indent.

2. The anti-seating mechanism of claim 1, further comprising a base frame (4) and an anti-seating push rod (5); the back side of the concave surface in the back frame (1) is arranged on the base frame (4) through a roller sliding rail mechanism; prevent accounting for the other end of seat lifting frame (2) and buckle extremely back frame (1) is connected with one side of base frame (4) and with prevent accounting for the flexible end hinge of seat push rod (5), the stiff end that prevents accounting for seat push rod (5) is fixed on base frame (4).

3. The anti-seizing mechanism according to claim 2, wherein the anti-seizing lifting frame (2) comprises a first arm plate (11), a second arm plate (12), a rotating shaft sleeve (3), a first lifting plate (14) and a second lifting plate (15); the two ends of the rotating shaft sleeve (3) are rotatably connected to one end, contacting with legs of a human body, of the back frame (1), the first lifting plate (14) and the second lifting plate (15) are fixed to the two ends of the rotating shaft sleeve (3), the upper surfaces of the first lifting plate (14) and the second lifting plate (15) are located in the same plane, the first lifting plate (14) and the second lifting plate (15) are arranged on one side, inwards concave, of the back frame (1), the first lifting plate (14) and the second lifting plate (15) are used for pushing out the lower sides of two thighs of the human body when the human body sits on a massage chair respectively, the first supporting arm plate (11) and the second supporting arm plate (12) are fixed to the middle of the rotating shaft sleeve (3), the first supporting arm plate (11) and the second supporting arm plate (12) are arranged at intervals and are parallel to each other, one end of the first supporting arm plate (11) and one end of the second supporting arm plate (12) far away from the rotating shaft sleeve (3) are hinged with the telescopic end of the anti-occupation seat push rod (5).

4. An anti-occupancy mechanism according to claim 3, further comprising a plurality of arm connecting rods (13), both ends of the plurality of arm connecting rods (13) being fixed to the first arm plate (11) and the second arm plate (12), respectively, and the hinge end of the push rod of the anti-occupancy push rod (5) being located between the first arm plate (11) and the second arm plate (12).

5. The anti-occupation mechanism according to claim 4, wherein a first inductive switch groove (16) is formed in the upper surface of the first lifting plate (14) in a downward concave mode, a second inductive switch groove (17) is formed in the upper surface of the second lifting plate (15) in a downward concave mode, and the first inductive switch groove (16) and the second inductive switch groove (17) are used for placing a switch for driving the anti-occupation push rod (5) to be started.

6. A seat occupation prevention mechanism according to claim 5, wherein the base frame (4) comprises a bottom support (9) and two vertical supports (10), the bottom support (9) is horizontally arranged on the ground, the two vertical supports (10) are vertically fixed on the bottom support (9), the two vertical supports (10) are mutually parallel and are arranged at intervals, the back side of the concave surface in the back frame (1) is arranged on the two vertical supports (10) through a roller sliding rail mechanism, and the back frame (1) is arranged in the space between the two vertical supports (10).

7. The seat occupation preventing mechanism according to claim 6, further comprising a zero-gravity push rod (6), a rotating connecting plate (7) and a supporting cross rod (8), wherein the fixed end of the zero-gravity push rod (6) is hinged to the bottom support (9), the supporting cross rod (8) is transversely arranged between the two vertical supports (10), the two ends of the supporting cross rod (8) are respectively rotatably connected with the two vertical supports (10), the middle of the rotating connecting plate (7) is fixed to the middle of the supporting cross rod (8), one end of the rotating connecting plate (7) is hinged to the telescopic end of the zero-gravity push rod (6), and the other end of the rotating connecting plate (7) is hinged to the fixed end of the seat occupation preventing push rod (5).

8. An anti-occupancy mechanism according to claim 7, wherein the zero-gravity push rod (6) is any one of an electric push rod, a hydraulic cylinder or an air cylinder.

9. A seat occupation prevention mechanism according to claim 8, wherein the back frame (1) comprises a backrest frame (18) and a seat frame (19), the backrest frame (18) and the seat frame (19) are connected with each other and the connection part is in smooth transition, the included angle between the plane of the seat frame (19) and the plane of the backrest frame (18) is 119-133 degrees, and the rotating shaft sleeve (3) is rotatably connected to one end, away from the backrest frame (18), of the seat frame (19).

10. A seat occupation prevention mechanism according to claim 9, wherein when the telescopic end of the seat occupation prevention push rod (5) extends to the extreme position, the first lifting plate (14) and the second lifting plate (15) are abutted on the seat frame (19).