CN220192576U - Electronic contest chair foot support retraction structure - Google Patents

Abstract

The utility model discloses a foot support retraction structure of an electronic competition chair, which relates to the technical field of electronic competition chair design and comprises a seat support, an inclination adjusting unit, a contraction unit and a foot support adjusting unit; the seat support is vertically arranged, and the rear side of the upper end of the seat support is fixedly connected with a transverse mounting frame; the inclination adjusting units are arranged at the left end and the right end of the mounting frame; the two shrinkage units are respectively arranged in the connecting frames at the two sides of the inclination adjusting unit; the foot support adjusting unit comprises a rotating shaft, a clamping strip, a sliding clamping block, a clamping sliding rail, a spring, a connecting fixing rod, a mounting hole, a clamping arm and a first limiting block, wherein the mounting hole is formed in one side opposite to the lower end of the clamping arm. The utility model has a multi-stage retraction device, can realize the effective retraction of the foot support, can be singly used for adjusting the inclination angle of the foot support plate, and meets the requirement of a user for randomly placing two feet, thereby improving the practicability of the device.

Description

Electronic contest chair foot support retraction structure

Technical Field

The utility model relates to the technical field of electronic competition chair design, in particular to an electronic competition chair foot support retraction structure.

Background

The electronic competition chair has very practical function, and the design accords with human engineering, thereby being convenient for the operation and experience of users. Because part of games require high investment of energy of users and keep sitting postures for a long time, the electronic competition chair can ensure the comfort level of the users. With the development of industry technology, the electronic competition chair is not limited to a game chair, and is widely popularized to the places of work, study and production of people at present. The electronic competition chair has very high human engineering in design and has great benefits on human health.

In the prior art, the electronic racing chair is often provided with a foot rest structure, but in the design process, the folding and unfolding of the foot rest are not deeply considered, so that in daily use, the steering of the electronic racing chair is affected due to the fact that the foot rest cannot be folded, and most electronic racing chairs are inconvenient to use because the adjustment of the angle of the foot rest is realized through the inclination adjustment of the chair body. Therefore, we propose a kind of electronic contest chair foot holds in palm and receive the structure.

Disclosure of Invention

The utility model aims to overcome the existing defects, and provides the foot support retraction structure of the electronic contest chair, which can realize the effective retraction of the foot support, can be singly used for adjusting the inclination angle of the foot support plate, and meets the requirement of a user for randomly placing two feet, thereby improving the practicability of the device and effectively solving the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: a foot support retraction structure of an electronic competition chair comprises a seat support, an inclination adjusting unit, a contraction unit and a foot support adjusting unit;

seat post: the seat is vertically arranged, and the rear side of the upper end of the seat pillar is fixedly connected with a transverse mounting frame;

tilt adjustment unit: are arranged at the left end and the right end of the mounting frame;

a shrinkage unit: two shrinkage units are symmetrically arranged in the connecting frames at two sides of the inclination adjusting unit;

a foot rest adjusting unit: contain axis of rotation, joint strip, slip joint piece, joint slide rail, spring, connection dead lever, mounting hole, centre gripping arm and stopper one, the centre gripping arm is equipped with two, the upper end of two centre gripping arms respectively with shrink unit left and right sides two lower extreme fixedly connected with of taking out the pull rod, the mounting hole has all been seted up to opposite one side of centre gripping arm lower extreme, the inside fixedly connected with connection dead lever of mounting hole, the left end circumference array of connection dead lever circumference side is provided with horizontal joint slide rail, the right-hand member of axis of rotation is rotated with the left end of connection dead lever and is connected, circumference array is provided with many horizontal joint strips on the right-hand member circumference side of axis of rotation, the joint slide rail sliding connection of slip joint piece and connection dead lever left end, the right-hand member fixedly connected with stopper one, the right-hand member fixedly connected with spring of slip joint piece, the hole has been seted up to the left end of slip joint piece, and offered the joint groove that is mutually joint with the joint of joint strip on the inner wall in hole.

The seat pillar is used for the seat to support and fixed connection mounting bracket, the mounting bracket is used for the installation of each unit and part of this device, the inclination adjustment unit is used for adjusting the inclination of link, the shrink unit is used for controlling the shrink of arm, the arm is used for the installation of each part in the foot rest adjustment unit, thereby realize the centre gripping and the adjustment of inclination to the foot layer board, the mounting hole is used for connecting the installation of dead lever, the connection dead lever is used for the installation of joint slide rail and forms rotatable coupling with the axis of rotation, the joint slide rail is used for forming the joint with the slip joint piece and makes slip joint piece can left and right sides sliding, the spring is used for propping up tight slip joint piece, make slip joint piece and epaxial joint strip looks joint of axis of rotation, thereby realize the restriction to axis of rotation pivoted, the axis of rotation makes the foot layer board can rotate around the axle, stopper one is used for restricting the distance that slip joint piece slides rightwards.

Further, the foot rest adjusting unit still contains round pin post, connection slide bar, stopper two and foot-operated adjusting frame, the lower extreme of centre gripping arm just is located the upper position department fixedly connected with horizontal connection slide bar of mounting hole, connection slide bar perpendicular to round pin post setting and with round pin post sliding connection, the lower extreme and the circumference side fixed connection of slip joint piece of connection slide bar, the upper end fixedly connected with foot-operated adjusting frame of connection slide bar, the left end fixedly connected with stopper two of round pin post. The pin post enables the connecting slide bar to transversely slide, the connecting slide bar is used for driving the foot-operated adjusting frame to move left and right, and the second limiting block is used for preventing the connecting slide bar from sliding from the left end of the pin post.

Further, still include foot rest receiver and foot rest board, the intermediate position of foot rest board left and right sides is respectively with the relative one end fixed connection of two axis of rotation about, fixedly connected with horizontal foot rest receiver between the link of inclination adjustment unit both sides, horizontal prolate opening has been seted up to the lower extreme of foot rest receiver. The foot support plate is used for placing the feet of a user, and when the foot support storage box is used for storing the foot support plate, the foot support plate is stored.

Further, the tilt adjusting unit comprises a connecting frame, a rotating shaft, a first spur gear, a motor, a transmission rod and a second spur gear, wherein the rotating shaft transversely penetrates through the upper end of the mounting frame, the rotating shaft is rotationally connected with the mounting frame, the left end and the right end of the rotating shaft are fixedly connected with the connecting frame, the first spur gear is sleeved on the outer side of the rotating shaft, the motor is installed in a square groove on the right side of the rear end of the mounting frame, one end of the transmission rod is fixedly connected with an output shaft of the motor, the second spur gear is sleeved at the other end of the transmission rod and is meshed with the first spur gear, and the input end of the motor is electrically connected with the output end of an external power supply through an external control switch group. The motor is used for driving the transmission rod to rotate, so that the rotation shaft is driven to rotate through the meshing connection of the spur gear II and the spur gear I, the adjustment of the inclination angle of the connecting frame is further realized, the modulus of the spur gear I is far greater than that of the spur gear II, and the accurate adjustment of the inclination angle of the connecting frame is facilitated.

Further, the inclination adjustment unit still contains and holds the piece, spout, spacing, slide connecting rod and fastening knob, the right side fixedly connected with of mounting bracket holds the piece, it has seted up curved spout on the right-hand member face of holding the piece, slide connecting rod's one end transversely passes the link and stretches into the spout inside to with the inside slip nut threaded connection of spout, slide connecting rod's the other end fixedly connected with fastening knob. The bearing block is used for being arranged in the chute, the chute is used for enabling the sliding screw cap in the chute to slide along the chute, the threaded end of the sliding connecting rod is in threaded connection with the sliding screw cap, and therefore the connecting frame can be fixed after the angle is adjusted by rotating the fastening knob, and the limiting strip is used for preventing the sliding screw cap from falling off from the chute.

Further, the shrink unit contains mounting groove, pneumatic cylinder, fixed block, fixing bolt, connecting rod and pull rod, the mounting groove with the pole syntropy has been seted up in the outside of link, the inside first regional fixedly connected with pneumatic cylinder of mounting groove, the lower extreme of pneumatic cylinder passes through fixing bolt and fixed block fixed connection, the one end of connecting rod and the flexible end fixed connection of pneumatic cylinder, the other end and the upper end fixed connection of pull rod of connecting rod, the pull rod passes the inside lower extreme of mounting groove and with the upper end fixed connection of centre gripping arm, the input of pneumatic cylinder passes through outside control switch group and is connected with external power source's output electricity. The mounting groove is used for the installation of pneumatic cylinder, and fixing bolt is used for fastening pneumatic cylinder and fixed block, and the connecting rod is used for driving the pull rod to remove along the direction of mounting groove under the effect of pneumatic cylinder flexible end.

Compared with the prior art, the utility model has the beneficial effects that: the electronic competition chair foot support retraction structure has the following advantages:

1. the foot rest is provided with a multistage retraction device, so that the foot rest can be effectively retracted and extended: when the foot supporting plate is folded, the foot supporting plate rotates to a position flush with the clamping arm under the action of foot force around the rotating shaft by controlling the sliding clamping block to loosen the clamping strip through the foot-operated adjusting frame, so that the first-step storage is completed; then the hydraulic cylinder controls the drawing rod to move, so that the foot supporting plate moves upwards and moves upwards to the inside of the foot supporting receiving box along with the drawing rod, and the second step of receiving is completed; the inclination adjusting unit controls the connecting frame to attach to the front side surface of the seat post, and the third step of storage is completed; the same reverse operation is the outward release process of the device;

2. when the foot support is not required to be folded or unfolded, the foot support adjusting unit can also be used for a user to randomly adjust the inclination angle of the foot support plate: the user pushes the sliding clamping blocks away by the side surfaces of the two feet, and the toe or heel is used for controlling the foot supporting plate to reach a proper angle, then the two feet are folded, the sliding clamping blocks clamp the clamping strips under the action of the springs, so that the rotation of the rotating shaft is limited, and the effect of fixing the inclination angle of the foot supporting plate is achieved;

3. the utility model has a multi-stage retraction device, can realize the effective retraction of the foot support, can be singly used for adjusting the inclination angle of the foot support plate, and meets the requirement of a user for randomly placing two feet, thereby improving the practicability of the device.

Drawings

FIG. 1 is a schematic view of the left front side of the present utility model;

FIG. 2 is a schematic view of a partial enlarged structure of the portion A in FIG. 1 according to the present utility model;

FIG. 3 is a schematic view of the right rear side of the present utility model;

FIG. 4 is a schematic view of a partially enlarged structure of the present utility model at B in FIG. 3;

FIG. 5 is a schematic view of the right front side of the present utility model;

fig. 6 is a schematic view of a partially enlarged structure at C in fig. 5 according to the present utility model.

In the figure: 1 seat pillar, 2 mounting brackets, 3 tilt adjusting unit, 31 link, 32 axis of rotation, 33 straight gear one, 34 motor, 35 transfer line, 36 straight gear two, 37 bearing block, 38 spout, 39 spacing, 310 sliding connection pole, 311 fastening knob, 4 shrink unit, 41 mounting groove, 42 pneumatic cylinder, 43 fixed block, 44 fixing bolt, 45 connecting rod, 46 pull rod, 5 foot support receiving box, 6 foot support board, 7 foot support adjusting unit, 71 axis of rotation, 72 joint strip, 73 sliding joint block, 74 joint slide rail, 75 spring, 76 connection dead lever, 77 mounting hole, 78 clamp arm, 79 first stopper, 710 pin, 711 connection slide bar, 712 second stopper, 713 foot motion adjusting frame.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-6, the present embodiment provides a technical solution: the foot support retraction structure of the electronic contest chair comprises a seat support column 1, an inclination adjusting unit 3, a contraction unit 4 and a foot support adjusting unit 7;

seat post 1: the seat is vertically arranged, and the rear side of the upper end of the seat post 1 is fixedly connected with a transverse mounting frame 2;

tilt adjustment unit 3: are arranged at the left end and the right end of the mounting frame 2;

shrink unit 4: two shrinkage units 4 are symmetrically arranged in the connecting frames 31 at two sides of the inclination adjusting unit 3;

foot rest adjusting unit 7: the clamping device comprises a rotating shaft 71, clamping bars 72, sliding clamping blocks 73, clamping sliding rails 74, springs 75, connecting fixing rods 76, mounting holes 77, clamping arms 78 and limiting blocks I79, wherein two clamping arms 78 are arranged, the upper ends of the two clamping arms 78 are fixedly connected with the lower ends of the left and right two drawing rods 46 of a shrinkage unit 4 respectively, the mounting holes 77 are formed in opposite sides of the lower ends of the clamping arms 78, the connecting fixing rods 76 are fixedly connected to the inside of the mounting holes 77, transverse clamping sliding rails 74 are arranged on the circumferential array of the left end of the circumference side of the connecting fixing rods 76, the right end of the rotating shaft 71 is rotatably connected with the left end of the connecting fixing rods 76, a plurality of transverse clamping bars 72 are arranged on the circumferential array of the circumference side of the right end of the rotating shaft 71, the sliding clamping blocks 73 are fixedly connected with the limiting blocks I79, the right end of the sliding clamping blocks 73 are fixedly connected with the springs 75, holes are formed in the left end of the sliding clamping blocks 73, and clamping grooves 72 are formed in the inner walls of the holes.

The seat pillar 1 is used for supporting the seat and fixedly connecting the mounting bracket 2, the mounting bracket 2 is used for the installation of each unit and part of the device, the inclination adjusting unit 3 is used for adjusting the inclination angle of the connecting frame 31, the contraction unit 4 is used for controlling the contraction of the clamping arm 78, the clamping arm 78 is used for installing each part in the foot support adjusting unit 7, thereby realizing the clamping of the foot support plate 6 and the adjustment of the inclination angle, the mounting hole 77 is used for installing the connecting fixing rod 76, the connecting fixing rod 76 is used for installing the clamping slide rail 74 and forming rotary connection with the rotating shaft 71, the clamping slide rail 74 is used for forming clamping with the sliding clamping block 73 and enabling the sliding clamping block 73 to slide left and right, the spring 75 is used for propping up against the sliding clamping block 73, the sliding clamping block 73 is clamped with the clamping strip 72 on the rotating shaft 71, thereby realizing the limitation of the rotation of the rotating shaft 71, the foot support plate 6 can rotate around the shaft, and the limiting block 79 is used for limiting the distance of the sliding clamping block 73 to the right.

The foot rest adjusting unit 7 further comprises a pin 710, a connecting slide bar 711, a second limiting block 712 and a foot movement adjusting frame 713, wherein the lower end of the clamping arm 78 is fixedly connected with the transverse connecting slide bar 711 at the position above the mounting hole 77, the connecting slide bar 711 is perpendicular to the pin 710 and is in sliding connection with the pin 710, the lower end of the connecting slide bar 711 is fixedly connected with the circumference side of the sliding clamping block 73, the upper end of the connecting slide bar 711 is fixedly connected with the foot movement adjusting frame 713, and the left end of the pin 710 is fixedly connected with the second limiting block 712. The pin 710 makes the connecting slide bar 711 slide laterally, the connecting slide bar 711 is used for driving the foot-operated adjusting frame 713 to move left and right, and the second limiting block 712 is used for preventing the connecting slide bar 711 from sliding from the left end of the pin 710.

Still include foot rest receiver 5 and foot rest board 6, the intermediate position of the left and right sides of foot rest board 6 respectively with the relative one end fixed connection of two axis of rotation 71 about, fixedly connected with horizontal foot rest receiver 5 between the link 31 of inclination adjustment unit 3 both sides, the lower extreme of foot rest receiver 5 has seted up horizontal prolate opening. The foot supporting plate 6 is used for placing feet of a user, and when the foot supporting receiving box 5 is used for folding the foot supporting plate 6, the foot supporting plate 6 is stored.

The tilt adjusting unit 3 comprises a connecting frame 31, a rotating shaft 32, a first spur gear 33, a motor 34, a transmission rod 35 and a second spur gear 36, wherein the rotating shaft 32 transversely penetrates through the upper end of the mounting frame 2, the rotating shaft 32 is rotationally connected with the mounting frame 2, the left end and the right end of the rotating shaft 32 are fixedly connected with the connecting frame 31, the first spur gear 33 is sleeved on the outer side of the rotating shaft 32, the motor 34 is installed in a square groove on the right side of the rear end of the mounting frame 2, one end of the transmission rod 35 is fixedly connected with an output shaft of the motor 34, the second spur gear 36 is sleeved on the other end of the transmission rod 35, the second spur gear 36 is meshed with the first spur gear 33, and the input end of the motor 34 is electrically connected with the output end of an external power supply through an external control switch group. The motor 34 is used for driving the transmission rod 35 to rotate, so that the rotation shaft 32 is driven to rotate through the meshing connection of the spur gear II 36 and the spur gear I33, and further the adjustment of the inclination angle of the connecting frame 31 is realized, and the modulus of the spur gear I33 is far greater than that of the spur gear II 36, so that the accurate adjustment of the inclination angle of the connecting frame 31 is facilitated.

The inclination adjusting unit 3 further comprises a bearing block 37, a sliding groove 38, a limiting strip 39, a sliding connecting rod 310 and a fastening knob 311, the right side of the mounting frame 2 is fixedly connected with the bearing block 37, the right end face of the bearing block 37 is provided with an arc-shaped sliding groove 38, one end of the sliding connecting rod 310 transversely penetrates through the connecting frame 31 and stretches into the sliding groove 38 and is in threaded connection with a sliding nut in the sliding groove 38, and the other end of the sliding connecting rod 310 is fixedly connected with the fastening knob 311. The bearing block 37 is used for forming the chute 38, the chute 38 is used for enabling a sliding nut in the chute to slide along the chute, the threaded end of the sliding connecting rod 310 is in threaded connection with the sliding nut, so that the connecting frame 31 can be fixed after the angle is adjusted by rotating the fastening knob 311, and the limit strip 39 is used for preventing the sliding nut from falling off from the chute 38.

The contraction unit 4 comprises a mounting groove 41, a hydraulic cylinder 42, a fixed block 43, a fixed bolt 44, a connecting rod 45 and a drawing rod 46, wherein the mounting groove 41 which is in the same direction with the rod is formed in the outer side of the connecting frame 31, the hydraulic cylinder 42 is fixedly connected to the upper half area inside the mounting groove 41, the lower end of the hydraulic cylinder 42 is fixedly connected with the fixed block 43 through the fixed bolt 44, one end of the connecting rod 45 is fixedly connected with the telescopic end of the hydraulic cylinder 42, the other end of the connecting rod 45 is fixedly connected with the upper end of the drawing rod 46, the drawing rod 46 penetrates through the lower end inside the mounting groove 41 and is fixedly connected with the upper end of the clamping arm 78, and the input end of the hydraulic cylinder 42 is electrically connected with the output end of an external power supply through an external control switch group. The mounting groove 41 is used for mounting the hydraulic cylinder 42, the fixing bolt 44 is used for fastening the hydraulic cylinder 42 and the fixing block 43, and the connecting rod 45 is used for driving the drawing rod 46 to move along the direction of the mounting groove 41 under the action of the telescopic end of the hydraulic cylinder 42.

The utility model provides a foot support retraction structure of an electronic competition chair, which has the following working principle:

the multistage retraction device works sequentially to finish the effective retraction of the foot rest: when the foot supporting plate 6 is retracted, the foot supporting plate 6 rotates to a position flush with the clamping arm 78 under the action of foot force around the rotating shaft 71 by controlling the sliding clamping block 73 to loosen the clamping strip 72 through the foot rotation adjusting frame 713, so that the first-step storage is completed; then the hydraulic cylinder 42 controls the drawing rod 46 to move, so that the foot supporting plate 6 moves upwards and moves upwards to the inside of the foot supporting and accommodating box 5 along with the drawing rod 46, and the second step of accommodating is completed; the inclination adjusting unit 3 controls the connecting frame 31 to attach to the front side surface of the seat post 1, and the third step of storage is completed; the reverse operation is the outward release process of the device. When the foot rest is not required to be folded or unfolded, the foot rest adjusting unit 7 can also be used for the user to randomly adjust the inclination angle of the foot rest 6: the user pushes the sliding clamping block 73 away by the side surface of the two feet, and controls the foot supporting plate 6 to reach a proper angle by using the toe or the heel, then the two feet are folded, the sliding clamping block 73 clamps the clamping strip 72 under the action of the spring 75, thereby limiting the rotation of the rotating shaft 71 and achieving the effect of fixing the inclination angle of the foot supporting plate 6; further, by fastening the side surfaces of the connection frame 31 and the receiving block 37 by rotating the fastening knob 311, the connection frame 31 can be fixed after the angle is adjusted.

It is noted that the control switch set disclosed in the above embodiments controls the operation of the motor 34 and the hydraulic cylinder 42 using methods commonly used in the art.

The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes or direct or indirect application in other related technical fields are included in the scope of the present utility model.

Claims (6)

1. An electronic contest chair foot holds in palm receive and releases structure, its characterized in that: comprises a seat pillar (1), a tilt adjusting unit (3), a contraction unit (4) and a foot rest adjusting unit (7);

seat post (1): the seat is vertically arranged, and the rear side of the upper end of the seat support column (1) is fixedly connected with a transverse mounting frame (2);

tilt adjustment means (3): are arranged at the left end and the right end of the mounting frame (2);

shrink unit (4): two shrinkage units (4) are respectively arranged in the connecting frames (31) at the two sides of the inclination adjusting unit (3);

foot support adjustment unit (7): the device comprises a rotating shaft (71), clamping strips (72), sliding clamping blocks (73), clamping sliding rails (74), springs (75), connecting fixing rods (76), mounting holes (77), clamping arms (78) and a first limiting block (79), wherein two clamping arms (78) are arranged, the upper ends of the two clamping arms (78) are fixedly connected with the lower ends of the left and right drawing rods (46) of a contraction unit (4) respectively, the mounting holes (77) are formed in opposite sides of the lower ends of the clamping arms (78), the connecting fixing rods (76) are fixedly connected to the inside of the mounting holes (77), the left end circumference array of the connecting fixing rods (76) is provided with transverse clamping sliding rails (74), the right end of the rotating shaft (71) is rotatably connected with the left end of the connecting fixing rods (76), the circumference array on the right end circumference of the rotating shaft (71) is provided with a plurality of transverse clamping strips (72), the sliding clamping blocks (73) are in sliding connection with the clamping sliding rails (74) at the left end of the connecting fixing rods (76), the right end of the sliding blocks (73) are fixedly connected with the sliding blocks (73), and the inner wall of the hole is provided with a clamping groove which is clamped with the clamping strip (72).

2. The electronic contest chair foot support retraction structure according to claim 1, wherein: the foot support adjusting unit (7) further comprises a pin (710), a connecting sliding rod (711), a second limiting block (712) and a foot-operated adjusting frame (713), the lower end of the clamping arm (78) is fixedly connected with a transverse connecting sliding rod (711) which is located above the mounting hole (77), the connecting sliding rod (711) is perpendicular to the pin (710) and is in sliding connection with the pin (710), the lower end of the connecting sliding rod (711) is fixedly connected with the circumference side of the sliding clamping block (73), the upper end of the connecting sliding rod (711) is fixedly connected with the second limiting block (713), and the left end of the pin (710) is fixedly connected with the second limiting block (712).

3. The electronic contest chair foot support retraction structure according to claim 1, wherein: still include foot rest receiver (5) and foot rest board (6), the intermediate position of foot rest board (6) left and right sides is respectively with the relative one end fixed connection of two axis of rotation (71) about, fixedly connected with horizontal foot rest receiver (5) between link (31) of slope adjustment unit (3) both sides, horizontal prolate opening has been seted up to the lower extreme of foot rest receiver (5).

4. The electronic contest chair foot support retraction structure according to claim 1, wherein: the utility model provides a tilt adjustment unit (3) contains link (31), axis of rotation (32), straight-tooth wheel one (33), motor (34), transfer line (35) and straight-tooth wheel two (36), the inside transversely running through in upper end of mounting bracket (2) has an axis of rotation (32), axis of rotation (32) are connected with the rotation of mounting bracket (2), and the equal fixedly connected with link (31) in both ends about axis of rotation (32), straight-tooth wheel one (33) has been cup jointed in the outside of axis of rotation (32), motor (34) are installed in the square groove on mounting bracket (2) rear end right side, the one end of transfer line (35) and the output shaft fixed connection of motor (34), the other pot head of transfer line (35) has straight-tooth wheel two (36), straight-tooth wheel two (36) are connected with straight-tooth wheel one (33) meshing, the input of motor (34) is connected with the output electricity of external power source through external control switch group.

5. The electronic contest chair foot support retraction structure according to claim 4, wherein: the inclination adjusting unit (3) further comprises a bearing block (37), a sliding groove (38), a limiting strip (39), a sliding connecting rod (310) and a fastening knob (311), the right side of the mounting frame (2) is fixedly connected with the bearing block (37), the right end face of the bearing block (37) is provided with the arc-shaped sliding groove (38), one end of the sliding connecting rod (310) transversely penetrates through the connecting frame (31) and stretches into the sliding groove (38) and is in threaded connection with a sliding nut in the sliding groove (38), and the other end of the sliding connecting rod (310) is fixedly connected with the fastening knob (311).

6. The electronic contest chair foot support retraction structure according to claim 1, wherein: the shrinkage unit (4) contains mounting groove (41), pneumatic cylinder (42), fixed block (43), fixing bolt (44), connecting rod (45) and pull rod (46), mounting groove (41) with pole syntropy are seted up in the outside of link (31), inside first regional fixedly connected with pneumatic cylinder (42) of mounting groove (41), the lower extreme of pneumatic cylinder (42) passes through fixing bolt (44) and fixed block (43) fixed connection, the one end of connecting rod (45) and the flexible end fixed connection of pneumatic cylinder (42), the other end of connecting rod (45) and the upper end fixed connection of pull rod (46), the upper end fixed connection with centre gripping arm (78) of pull rod (46) through the inside lower extreme of mounting groove (41), the input of pneumatic cylinder (42) is connected with the output electricity of external power source through outside control switch group.