Disclosure of Invention
The present invention is directed to solving the above problems, and an object of the present invention is to provide a device that has advantages of forming a stable support structure for a person to place articles and external devices such as a tablet computer, and enabling the person to work or entertain themselves in a vehicle.
The invention is realized by the following technical scheme: the new energy automobile folding table comprises a support frame, wherein the support frame is of a frame type structure, a plurality of bottom supporting devices arranged in an array mode are arranged in the support frame, a turnover frame is rotatably arranged on the left side of the support frame, a vertical frame is rotatably arranged in the turnover frame, a seat clamping device used for being clamped and fixed with a seat is arranged on the upper side of the vertical frame, and a placing platform device which is located on the outer side of the vertical frame and is convenient for personnel to work or study is arranged on the lower side of the seat clamping device, so that the functions of being convenient to fold and store and enabling the personnel to work and study more conveniently are achieved by the aid of the device.
In a further technical scheme, the bottom supporting device comprises right angle blocks arranged on the inner side and the outer side of the supporting frame, an open matching groove is arranged in each right angle block, a circular groove opposite to the matching groove is arranged in each right angle block far away from the matching groove, the matching groove and the circular groove are completely arranged in the vertical end faces on the two sides of each right angle block, the right angle blocks positioned on the inner side of the supporting frame are connected with the supporting frame in a clamping and matching mode through the circular grooves, the right angle blocks positioned on the outer side of the supporting frame are connected with the supporting frame in a clamping and matching mode through the matching grooves, the right angle blocks on the two sides of the supporting frame are fixedly connected in a matching and matching mode through fixing components, and supporting components which are vertically symmetrical and are limited and fixed with the lower side of the automobile seat are arranged on the upper end face and the lower end face of the right angle blocks positioned on the inner side, thereby improving the stability of other structures in the device.
Further technical scheme, fixed subassembly including set firmly in the connecting lug of right angle piece up end, the connecting lug downside is provided with and is located the bottom of right angle piece lower extreme terminal surface is protruding, connecting lug and bottom arch set up in right angle department in the right angle piece is located the support frame both sides the right angle piece passes through connecting lug fixes, and fixed mode can adopt set up bolt and nut in the connecting lug and with both sides the right angle piece carries out indirect fixed cooperation and connects to make supporting component can stabilize the setting.
Further technical scheme, supporting component is including setting firmly the shell of terminal surface about the right angle piece, be provided with open-ended internal opening chamber in the shell, it has placed power spring to go into the oral cavity, power spring one end with internal opening chamber endwall is fixed, power spring other end elasticity is provided with the flat board that slides, keeps away from the right angle piece the flat board terminal surface that slides is provided with the push rod, the gliding running through of push rod the shell, be provided with in the push rod and be used for just this the push rod carries out the cooperation structure that sliding fit is connected with the seat to utilize cooperation structure to make supporting component and car seat slip support, make the support frame is convenient for set up in the car seat downside.
According to a further technical scheme, the matching structure comprises a base fixed with the pushing rod, and rollers are arranged in the base in a rotating mode, so that the base extends into a space between an automobile seat and the inside of an automobile body, and the supporting frame is elastically fixed in the space better.
Further technical scheme, seat clamping device include with vertical frame sliding fit connects and is located the upset piece of vertical frame upside, be provided with the open-ended inner chamber in the upset piece, the inner chamber upper end wall has set firmly driving motor, the power connection is provided with bilateral symmetry's transmission shaft in the driving motor, the transmission shaft with inner chamber end wall normal running fit connects, driving motor bilateral symmetry is provided with and is used for adorning the fixed dress card subassembly of card with car seat to utilize dress card subassembly to realize with vertical frame indirect is fixed so that place platform device's use.
Further technical scheme, dress card subassembly include with the slide plate that inner chamber upper end wall sliding fit connects, slide plate with transmission shaft screw-thread fit connects, keeps away from driving motor slide plate terminal surface has set firmly the push rod, the gliding running through of push rod the upset piece is kept away from slide plate push rod terminal surface has set firmly splint, be provided with the mode that adopts the both sides centre gripping in the splint with the car seat centre gripping in order to carry out indirect fixed clamping structure to equipment to it is fixed to utilize clamping structure to carry out indirect centre gripping with car seat.
According to the technical scheme, the clamping structure comprises an inner sliding cavity which is arranged in the clamping plate and penetrates through the clamping plate in the front and back direction, a clamping block is arranged on the end face of the clamping plate close to the vertical frame, a sliding plate is arranged in the inner sliding cavity in a sliding mode, a sliding push rod is arranged in the pushing rod in a matched mode, the sliding push rod far away from the vertical frame is provided with a rotating disc in the end face of the sliding push rod, the outer surface of the sliding push rod is provided with a side plate in a rotating mode, a rotating plate is arranged in the side plate in a rotating mode, the rotating plate is connected with the sliding plate in a rotating matched mode, and therefore the rotating disc drives the sliding push rod to rotate after rotating, the sliding push rod drives the sliding plate to indirectly slide, and the sliding.
Further technical scheme, the place the platform device includes the landing slab, be provided with open-ended opening chamber in the landing slab, the intercommunication is provided with the cooperation chamber of symmetry in the lower terminal wall of opening chamber, the cooperation chamber runs through the setting, the cooperation chamber with vertical frame is relative, be provided with the open-ended hole of placing in the lower terminal wall of opening chamber, the landing slab down the terminal surface be provided with be used for with vertical frame carries out indirect fixed coupling assembling to utilize coupling assembling to make the landing slab with vertical frame indirect is fixed.
The technical scheme is that the connecting assembly comprises bottom connecting blocks which are fixedly arranged on the lower end surface of the platform board and are symmetrical front and back, a round rotating shaft is fixedly arranged between the bottom connecting blocks, turnover connecting plates which are symmetrical front and back are rotationally arranged in the round rotating shaft, a base which is positioned on the other side of the bottom connecting blocks is fixedly arranged on the lower end surface of the platform board, the base is symmetrically arranged front and back, locking structures which are used for fixing the turnover connecting plates and the platform board on the outer surface of the vertical frame are arranged in the turnover connecting plates and the base, each locking structure comprises a round connecting rod which is in rotating fit connection with the turnover connecting plates and the base, power boxes which are symmetrical front and back are fixedly arranged on the front end surface and the rear end surface of the round connecting rod, a through fixed fit cavity is arranged in each power box, the vertical frame penetrates through the fixed fit cavity and abuts against the end wall of the fixed fit cavity, a side lug fixed with the power box is arranged on one side of the convex strip far away from the turnover connecting plate, an inner thread block is rotationally arranged in the side convex block, a rotating disc is fixedly arranged at one side of the inner thread block close to the convex strip, an inner rotating rod is arranged in the rotating disc and the inner thread block in a matching and connecting way, a push plate is fixedly arranged on the end surface of the inner rotating rod far away from the rotating disc, the pushing plate is arranged between the raised strips and is connected with the raised strips in a sliding fit manner, a side flat plate is fixedly arranged on the end surface of the inner rotating rod far away from the rotating disc, a sliding shaft is fixedly arranged on the end surface of the side flat plate close to the rotating disc, the sliding shaft is extended into the fixed matching cavity in a sliding way, a clamping fixed block is fixedly arranged on the end face of the sliding shaft far away from the side flat plate, the vertical frame fixing block is fixed by the clamping fixing block, so that the platform plate is fixed by the locking structure.
The invention has the beneficial effects that: this equipment has adopted bottom sprag device, seat clamping device and place the platform device, has realized adopting with the mode of car seat dress card, with supporting platform stable fixed to the personnel use peripheral equipment such as notebook or panel computer, very big improvement personnel's comfort level and experience feel, equipment wholly adopts folding mode to make equipment store convenient to carry.
Above-mentioned advantage concrete manifestation does, and equipment wholly adopts folding mode, and the personnel of being convenient for fold equipment and carry and use, frame-type beta structure that vertical frame, roll-over stand and support frame are constituteed makes the portable folding function that has of equipment, utilizes gyro wheel, base, push rod, the structure of sliding flat board, power spring, internal opening chamber and shell, makes the support frame is more smooth when slipping into the car seat downside, makes equipment firmly adorn the card in car seat downside, utilizes the design of circular recess and cooperation groove has adopted direct utilization right angle piece and connection lug will the support frame cladding is fixed, has practiced thrift the manufacturing cost of equipment, and makes the part change more convenient, utilizes. The turnover block can be turned over, so that the angle of the equipment can be changed more variously in the process of clamping the equipment with the automobile seat, the practicability of the equipment is improved, the driving motor is used for indirectly driving the pushing rod to slide, so that the clamping block and the sliding plate can better clamp the automobile seat, the rotating disc is used for rotating, the sliding rod is in threaded fit connection with the pushing rod, so that the side plate can move, the side plate drives the sliding plate to indirectly slide, the automobile seat is fully fixed between the clamping block and the sliding plate by using the sliding plate, the clamping stability of the equipment is improved, the open cavity and the placing hole are used for facilitating the placement of a notebook, a tablet computer, a water cup and the like by using the bottom connecting block, the turnover connecting plate, the round connecting rod, the base, the power box and the like, and the equipment can be used more conveniently by using the bottom connecting block, the turnover connecting plate, the round connecting rod, realized utilizing and rotating the mode of rolling disc makes the rolling disc drives the thrust plate slides, and then makes interior bull stick, side flat board, the axle that slides and the centre gripping fixed block slide, utilize the centre gripping fixed block is fixed the mode of vertical frame makes above-mentioned structure can make the inclination and the high emergence of landing slab change, make the better practical equipment of personnel, very big improvement the equipment practicality, the effect of sand grip lies in making the thrust plate fully adorn the card in between the sand grip and make the thrust plate slides stably.
Detailed Description
As shown in fig. 1 to 5, the present invention is explained in detail, and for convenience of description, the following orientations are defined as follows: the upper, lower, left, right, front and back directions are consistent with the upper, lower, left, right, front and back directions of the projection relation of the novel energy automobile folding table shown in the figure 1, the novel energy automobile folding table comprises a support frame 101, the support frame 101 is of a frame type structure, a plurality of bottom supporting devices 950 arranged in an array are arranged in the support frame 101, at least four fixing devices are arranged, a turnover frame 102 is arranged on the left side of the support frame 101 in a rotating mode, the turnover frame 102 is of the frame type structure, a vertical frame 103 is arranged in the turnover frame 102 in a rotating mode, the vertical frame 103 is of the frame type structure, a seat clamping device 951 used for being clamped and fixed with a seat is arranged on the upper side of the vertical frame 103, a placing platform device 952 which is located on the outer side of the vertical frame 103 and facilitates work or study of a person is arranged on the lower side of the seat clamping device 951, the diameters of the support frame 101, the turnover frame 102 .
Advantageously, wherein the bottom supporting device 950 comprises right-angle blocks 407 arranged on the inner side and the outer side of the supporting frame 101, the right-angle blocks 407 are of a right-angle structure, the height of the right-angle blocks 407 is greater than the diameter of the supporting frame 101, an open matching groove 409 is arranged in the right-angle blocks 407, a circular groove 408 opposite to the matching groove 409 is arranged in the right-angle blocks 407 far away from the matching groove 409, the circular groove 408 and the matching groove 409 are of a semicircular structure, the diameter of the circular groove 408 and the diameter of the matching groove 409 are the same as that of the supporting frame 101, the matching groove 409 and the circular groove 408 are both completely arranged in the vertical end faces on both sides of the right-angle blocks 407, the right-angle blocks 407 on the inner side of the supporting frame 101 are connected with the supporting frame 101 in a clamping and matching manner through the circular groove 408, the right-angle blocks 407 on the outer side of, the upper end face and the lower end face of the right-angle block 407 positioned on the inner side of the support frame 101 are provided with support components which are symmetrical up and down and are limited and fixed with the lower side of the automobile seat, so that the equipment and the automobile seat are fixed by utilizing the components, and the stability of other structures in the equipment is improved.
Advantageously, the fixing component comprises a connecting convex block 406 fixedly arranged on the upper end face of the right-angle block 407, a bottom protrusion 411 arranged on the lower end face of the right-angle block 407 is arranged on the lower side of the connecting convex block 406, the connecting convex block 406 and the bottom protrusion 411 are arranged at a right angle in the right-angle block 407, the right-angle blocks 407 arranged on two sides of the supporting frame 101 are fixed through the connecting convex block 406 by adopting a mode of arranging a bolt and a nut in the connecting convex block 406 to indirectly fixedly and cooperatively connect the right-angle blocks 407 on two sides, so that the supporting component can be stably arranged.
Beneficially, the supporting assembly includes a barrel 410 fixedly disposed on the upper and lower end surfaces of the right-angle block 407, an open inner open cavity 405 is disposed in the barrel 410, a power spring 404 is disposed in the inner open cavity 405, one end of the power spring 404 is fixed to the end wall of the inner open cavity 405, the other end of the power spring 404 is elastically provided with a sliding plate 403, the diameter of the sliding plate 403 is the same as that of the inner open cavity 405, a push rod 401 is disposed on the end surface of the sliding plate 403 far away from the right-angle block 407, the push rod 401 slidably penetrates through the barrel 410, and a matching structure for connecting the push rod 401 and the seat in a sliding fit manner is disposed in the push rod 401, so that the supporting assembly and the vehicle seat are slidably supported by the matching structure, and the supporting frame 101 is.
Advantageously, the cooperating structure comprises a base 402 fixed to the push rod 401, and a roller 412 is rotatably disposed on the base 402, wherein the diameter of the roller 412 is at least 4cm, so that the base 402 can be inserted into the space between the seat and the inside of the vehicle body, thereby allowing the support frame 101 to be elastically fixed in the space.
Beneficially, wherein, seat clamping device 951 includes the turning block 109 that is connected with vertical frame 103 sliding fit and is located the vertical frame 103 upside, be provided with open-ended inner chamber 110 in the turning block 109, the inner chamber 110 upper end wall has set firmly driving motor 112, power connection is provided with bilateral symmetry's transmission shaft 501 in driving motor 112, transmission shaft 501 is connected with inner chamber 110 end wall normal running fit, driving motor 112 bilateral symmetry is provided with and is used for carrying out the dress card subassembly fixed with the car seat, thereby utilize the dress card subassembly to realize fixing vertical frame 103 indirectly so that place platform device 952's use.
Beneficially, wherein, the clamping assembly comprises a sliding plate 111 connected with the upper end wall of the inner cavity 110 in a sliding fit mode, the sliding plate 111 is connected with the transmission shaft 501 in a threaded fit mode, a pushing rod 201 is fixedly arranged on the end face, far away from the driving motor 112, of the sliding plate 111, the pushing rod 201 penetrates through the turnover block 109 in a sliding mode, a clamping plate 212 is fixedly arranged on the end face, far away from the sliding plate 111, of the pushing rod 201, a clamping structure which clamps the automobile seat in a two-side clamping mode to indirectly fix the automobile seat is arranged in the clamping plate 212, and therefore the clamping structure is used for indirectly clamping and fixing the automobile.
Beneficially, the clamping structure comprises an inner sliding cavity 204 which is arranged in the clamping plate 212 and penetrates through the clamping plate in a front-back mode, a clamping block 202 is fixedly arranged on the end face of the clamping plate 212 close to the vertical frame 103, a sliding plate 205 is arranged in the inner sliding cavity 204 in a sliding mode, a sliding push rod 211 is arranged in the sliding push rod 201 in a matched and connected mode through internal threads, the length of the sliding push rod 211 is smaller than that of the sliding push rod 201, a rotating disc 209 is fixedly arranged on the end face of the sliding push rod 211 far away from the vertical frame 103, a side plate 210 is arranged on the outer surface of the sliding push rod 211 in a rotating mode, a rotating plate 207 is arranged in the side plate 210 in a rotating and matched and connected mode with the sliding plate 205, the rotating disc 209 is used for rotating the sliding push rod 211, the sliding plate 205 is driven.
Beneficially, wherein, the placing platform device 952 includes a platform plate 107, an open-ended open cavity 106 is provided in the platform plate 107, a symmetrical matching cavity 108 is provided in the lower end wall of the open cavity 106 in a communicating manner, the matching cavity 108 is disposed in a penetrating manner, the matching cavity 108 is opposite to the vertical frame 103, the diameter and width of the matching cavity 108 are greater than the diameter of the vertical frame 103, an open-ended placing hole 105 is provided in the lower end wall of the open cavity 106, and a connecting component for indirectly fixing with the vertical frame 103 is provided on the lower end surface of the platform plate 107, so that the platform plate 107 and the vertical frame 103 are indirectly fixed by the connecting component.
Beneficially, wherein the connecting assembly comprises bottom connecting blocks 504 which are fixed on the lower end surface of the platform plate 107 and are symmetrical in the front-back direction, a circular rotating shaft 503 is fixed between the bottom connecting blocks 504, a turnover connecting plate 505 which is symmetrical in the front-back direction is rotatably arranged in the circular rotating shaft 503, the length of the turnover connecting plate 505 is smaller than that of the platform plate 107, a base 509 which is located on the other side of the bottom connecting block 504 is fixed on the lower end surface of the platform plate 107, the base 509 is symmetrically arranged in the front-back direction, locking structures which are used for fixing the turnover connecting plate 505 and the platform plate 107 on the outer surface of the vertical frame 103 are arranged in the turnover connecting plate 505 and the base 509, the locking structures comprise circular connecting rods 508 which are in rotating fit connection with the turnover connecting plate 505 and the base, power boxes 510 which are symmetrical in the front-back direction are fixed on the front-back end surface of the circular connecting rods 508, a through fixed fit cavity 611 is arranged in the power boxes 510, the, a side convex block 606 fixed with the power box 510 is arranged on one side of the convex strip 603 far away from the turning connecting plate 505, an inner thread block 608 is arranged in the side convex block 606 in a rotating mode, a rotating disc 605 is fixedly arranged on one side of the inner thread block 608 close to the convex strip 603, an inner rotating rod 607 is arranged between the rotating disc 605 and the inner thread block 608 in a matching mode, the diameter of the rotating disc 605 is larger than that of the inner rotating rod 607, a pushing plate 604 is fixedly arranged on the end face of the inner rotating rod 607 far away from the rotating disc 605, the pushing plate 604 is arranged between the convex strips 603 and is in sliding matching connection with the convex strip 603, a side flat plate 609 is fixedly arranged on the end face of the inner rotating rod 607 far away from the rotating disc 605, a sliding shaft 610 is fixedly arranged on the end face of the side flat plate 609 close to the rotating disc 605, the sliding shaft 610 slidably extends into a fixed matching cavity 611, a clamping fixing block 612 is fixedly arranged on the end face of the sliding shaft 610.
During initial state, above-mentioned device, subassembly and structure are in the stop work state, before equipment works, install equipment in the vehicle inside earlier, and during initial state, equipment is in fold condition to be convenient for deposit, vertical frame 103 is located the position that is close to support frame 101 when fold condition, and platform board 107 is located the position that is close to vertical frame 103 and offsets with vertical frame 103.
When the device is unfolded, the support 101 is firstly placed in a space between the lower side of the automobile seat and the automobile body, at this time, the power spring 404 plays a role of elastic pushing, so that the sliding flat plate 403 drives the power spring 404, the base 402 and the rollers 412 to abut against the automobile body and the lower side of the automobile seat, at this time, the support 101 can completely slide into the space, then, the turnover frame 102 and the vertical frame 103 can freely swing, the clamp plate 212 is convenient to adjust and is limited and fixed with the automobile seat, at this time, after the turnover block 109 is turned over, the turnover block 109 is turned over to the right side, after the driving motor 112 works, the transmission shaft 501 is driven to rotate, the sliding plate 111 drives the pushing rod 201 to move, the clamp plate 212 and the automobile seat are in a clamping state, at this time, the rotating disc 209 is rotated, after the rotating disc 209 is rotated, because the sliding rod 211 is in threaded fit with, the sliding push rod 211 rotates to drive the side plate 210 to move, and the side plate 210 moves to drive the rotating plate 207 to swing, so that the rotating plate 207 drives the sliding plate 205 to slide, and at the moment, the sliding plate 205 and the clamping block 202 are used for limiting, clamping and fixing with the automobile seat.
When the platform plate 107 is used, the inclination angle and the set height of the platform plate 107 can be adjusted, specifically, the rotating disc 605 is rotated, the rotating disc 605 and the internal thread block 608 are rotated to drive the internal thread block 608 to slide, the internal thread block 608 slides to drive the side plate 609, the sliding shaft 610 and the clamping fixing block 612 to slide, the clamping fixing block 612 and the vertical frame 103 are in a state of being disengaged, at this time, the position of the power box 510 outside the vertical frame 103 is adjusted, the platform plate 107 is gradually in a certain angle and height by using the structures of the bottom connecting block 504, the turning connecting plate 505, the round connecting rod 508, the power box 510, the base 509 and the like, the rotating disc 605 is rotated after the adjustment is finished, the clamping fixing block 612 limits and fixes the vertical frame 103 again, a person can place a cup and the like by using the placing hole 105, and the platform plate 107 can also be used for placing a notebook computer or the like, the matching cavity 108 is used to prevent the platform board 107 from interfering with the vertical frame 103, and when the platform board 107 is adjusted, the matching cavity 108 can abut against the vertical frame 103 to prevent the interference.
The invention has the beneficial effects that: this equipment has adopted bottom sprag device 950, seat clamping device 951 and place the platform device 952, has realized the mode that adopts and car seat dress card, and is stable fixed with supporting platform to the personnel use peripheral equipment such as notebook or panel computer, very big improvement personnel's comfort level and experience feel, equipment wholly adopts folding mode to make equipment store convenient to carry.
The advantages are expressed in that the whole equipment adopts a folding mode, so that the equipment is conveniently folded, carried and used by personnel, the equipment has a portable folding function by a frame-type folding structure consisting of the vertical frame 103, the turnover frame 102 and the support frame 101, the support frame 101 is more smoothly slid into the lower side of the automobile seat by using the structures of the rollers 412, the base 402, the pushing rod 401, the sliding flat plate 403, the power spring 404, the inner opening cavity 405 and the cylinder shell 410, so that the equipment is firmly clamped at the lower side of the automobile seat, the support frame 101 is fixedly coated by directly using the right-angle block 407 and the connecting lug 406 by using the design of the circular groove 408 and the matching groove 409, the manufacturing cost of the equipment is saved, parts are more conveniently replaced, the equipment can be overturned by using the turnover block 109, the angle change is more diversified in the clamping process of the equipment and the automobile seat, the practicability of the equipment is improved, the pushing rod 201 is indirectly driven to slide by the driving motor 112, the clamping block 202 and the sliding plate 205 are enabled to better clamp the automobile seat, the rotating disc 209 is utilized to rotate, the sliding rod 211 and the pushing rod 201 are in threaded fit connection, the side plate 210 can move, the side plate 210 drives the sliding plate 205 to indirectly slide, the automobile seat is fully fixed between the clamping block 202 and the sliding plate 205 by the sliding plate 205, the clamping stability of the equipment is improved, the open cavity 106 and the placing hole 105 are utilized to facilitate the placement of a notebook, a tablet personal computer, a water cup and the like by a person, the equipment is more convenient to use by the person, and the structures such as the bottom connecting block 504, the overturning connecting plate 505, the round connecting rod 508, the base 509, the power box 510 and the like are utilized to rotate the rotating disc 605, the rotating disc 605 drives the pushing plate 604 to slide, and the inner rotating rod 607 is further utilized to rotate the rotating disc 607, The side flat plate 609, the sliding shaft 610 and the clamping fixing block 612 slide, and the inclination angle and the height of the platform plate 107 can be changed by the structure in a mode of fixing the vertical frame 103 by the clamping fixing block 612, so that the practical equipment is better for personnel, the equipment practicability is greatly improved, and the convex strips 603 are used for fully clamping the pushing plate 604 between the convex strips 603 and enabling the pushing plate 604 to slide stably.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although the support frame 101, the turning frame 102, the vertical frame 103, the placement hole 105, the open cavity 106, the platform plate 107, the engagement cavity 108, the turning block 109, the inner cavity 110, the sliding plate 111, the driving motor 112, the pushing rod 201, the holding block 202, the inner sliding cavity 204, the sliding plate 205, the rotating plate 207, the rotating disk 209, the side plate 210, the sliding rod 211, the clamping plate 212, the pushing rod 401, the base 402, the sliding plate 403, the power spring 404, the inner open cavity 405, the connection protrusion 406, the right-angled block 407, the circular groove 408, the engagement groove 409, the cylinder shell 410, the bottom protrusion 411, the roller 412, the transmission shaft 501, the circular rotating shaft 503, the bottom connection block 504, the turning connection plate 505, the circular connecting rod 508, the base 509, the power box 510, the protruding strip 603, the pushing plate 604, the rotating disk 605, the side protrusion 606, the inner rotating rod 607, the internal threaded block 608, the side plate 609, the fixed engagement cavity 611, the holding block 612, the fixed engagement, The terms bottom support device 950, seat clamp device 951, placement platform device 952, etc., do not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention and they are to be interpreted as any additional limitation which is not in accordance with the spirit of the present invention.