Central control reset pedal assembly and medical carrier

Abstract

The utility model relates to a central control reset pedal assembly and a medical carrier, and is characterized in that the central control reset pedal assembly comprises a groove shell and a sliding block arranged in the groove shell, the center of the sliding block is provided with a sliding block limiting groove and a rotor arranged in the sliding block limiting groove in a penetrating mode, and the two ends of the rotor are rotationally hinged to the groove shell; a compression spring is arranged between one side wall face of the sliding block and the groove shell, the rotating axis of the rotor is perpendicular to the sliding direction of the sliding block, a shifting block is rotationally hinged to the groove shell, a rotating shaft used for outputting different rotating stations is fixedly connected to the shifting block, the lower end of the shifting block is connected with the sliding block, and the lower end of the shifting block is connected with the groove shell. The upper end of the shifting block is connected with the pedal plate, when the pedal plate is treaded, the shifting block is driven to swing and rotate, and then the sliding block is driven to slide, so that the sliding block, the shifting block and the rotating shaft are locked on a station through the mutual clamping stagnation effect of the limiting groove and the rotor; the center control reset pedal assembly is simple in structure and reasonable in design, and one pedal can control one or more trundles to brake after the medical carrier is installed.

Description

Technical Field

[0001] The utility model relates to the field of caster brake control, in particular to a central control reset foot pedal assembly and a medical vehicle carrier. Background Art

[0002] A medical vehicle carrier refers to a vehicle used in a medical place for carrying items. It usually includes a platform board and four casters arranged on the platform board. In order to control the brakes of the medical vehicle carrier, brake pedals are provided on the casters. In case of emergency braking or for convenient braking, usually the user only steps on the brake pedal of a single caster to brake. The problem with this is that the other three casters are not braked, resulting in the offset of the platform board and the items carried thereon, and it is easy for the items carried to fall or topple over.

[0003] In order to enable a foot pedal to control the brakes of one or more casters, the currently retrieved Chinese patent "A Directional Caster" with the publication number CN209141809 is found. It includes a first control assembly, a second control assembly, a first connecting shaft and a caster; the first control assembly is installed on the first connecting shaft; the second control assembly is connected to the first control assembly for controlling the movement of the first control assembly; the top of the first support arm and the top of the second support arm are respectively rotatably installed at both ends of the first connecting shaft, the bottom of the first support arm is installed at one end of the rotating shaft of the caster, and the bottom of the second support arm is installed at the other end of the rotating shaft of the caster; the first control assembly is respectively connected to the first support arm and the second support arm; the first connecting shaft is installed at the bottom of the vehicle carrier in the transverse direction of the vehicle carrier. Although this directional caster can achieve braking of one or more casters by one pedal, its structure is complex and it is not convenient to adjust whether one pedal controls one caster or multiple casters according to different control requirements. Summary of the Invention

[0004] In view of the deficiencies of the above-mentioned existing technologies, the purpose of the present utility model is to provide a central control reset foot pedal assembly and a medical vehicle carrier. The central control reset foot pedal assembly has a simple structure and reasonable design, which is beneficial to realizing the braking of one or more casters by one foot pedal after the medical vehicle carrier is installed.

[0005] The central control reset foot pedal assembly of the utility model is characterized in that: it includes a groove housing and a slider arranged in the groove housing. A slider limiting groove and a rotor penetrating through the slider limiting groove are arranged at the central part of the slider. Both ends of the rotor are rotationally hinged on the groove housing. A compression spring is arranged between one side wall surface of the slider and the groove housing. The rotation axis line of the rotor is perpendicular to the sliding direction of the slider. A dial block is rotationally hinged on the groove housing. A rotating shaft for outputting different rotation stations is fixedly connected to the dial block. The lower end of the dial block is connected to the slider, and the upper end of the dial block is connected to the foot pedal. When the foot pedal is stepped on, it drives the dial block to swing, and then drives the slider to slide, so that the slider, the dial block and the rotating shaft are locked at a station under the mutual jamming action of the limiting groove and the rotor.

[0006] Preferably, the above-mentioned rotor is cylindrical, and V-shaped grooves are provided on both sides of its cylinder body. The slider limiting groove has a reset area, a limiting area and a rotor turning area. The reset area is rectangular, and the width direction of the reset area is larger than the long side of the rotor cross-section, so that the rotation can rotate within the reset area; the limiting area is misaligned with the reset area in the width direction, and the width of the connection position between the limiting area and the reset area is smaller than the long side of the rotor cross-section, so that the slider is blocked by the rotor and cannot slide at this connection position; the rotor turning area has a concave groove and a convex part adjacent to the concave groove, so that when the slider slides and the rotor is in this area, the rotor is turned by the convex part; when the rotor is located in the reset area, it is facing the foot pedal in the non-pressed position, that is, the foot pedal and the rotating shaft are not locked at the station; when the rotor is located in the limiting area, the foot pedal is in the middle position of being pressed down, that is, the foot pedal and the rotating shaft are locked at the station; when the rotor is located in the rotor turning area, the foot pedal is in the limit position of being pressed down, that is, the foot pedal and the rotating shaft are not locked at the station.

[0007] Preferably, a cover plate is fixedly installed on the notch of the above-mentioned groove housing. A support seat for rotationally hinging the rotating shaft is fixedly provided on the cover plate. The rotating shaft penetrates through the central hole of the dial block. A rotation stopping pin is fixedly provided in the middle of the rotating shaft, and a rotation stopping groove channel matching with the rotation stopping pin is provided in the central hole.

[0008] Preferably, a pair of convex ears arranged in parallel at intervals are provided on the above-mentioned slider. A cylindrical pin is provided on the convex ears. A fork groove for clamping the cylindrical pin is provided at the lower part of the dial block. When the dial block swings, the slider is driven to slide through the cooperation of the fork groove and the cylindrical pin.

[0009] Preferably, a fixed block and a pressing plate are arranged in parallel on the opposite sides inside the above-mentioned groove housing. A guide rod for guiding the sliding of the slider is arranged between the fixed block and the pressing plate. The compression spring is sleeved on the guide rod. Counterbores are provided on the side surfaces of the slider and the fixed block. Both ends of the compression spring are pressed in the counterbores of the slider and the fixed block.

[0010] Preferably, a rotor through hole for the rotor to pass through is provided on the bottom plate of the above-mentioned trough shell, a trough shell plate bridge is fixedly provided at the slot position of the trough shell, two ends of the rotor are provided with stepped portions for sleeved bearings, and the trough shell plate bridge is provided with a limiting hole for limiting and fixing the bearing at one end of the rotor, and the rotor through hole serves as a limiting hole for limiting and fixing the bearing at the other end of the rotor.

[0011] Preferably, the foot pedal is in a rectangular shape, and one side portion thereof is fixedly connected to the upper end surface of the shift block, so that the foot pedal has a suspended portion extending out of the upper end of the shift block.

[0012] The utility model uses a medical carrier using a central control reset pedal assembly, which is characterized by comprising a platform plate of the medical carrier and four controllable brake casters mounted on the platform plate, the central control reset pedal assembly being detachably connected to the platform plate, a lifting column in the controllable brake casters for controlling the brakes thereof passing through the platform plate from bottom to top, and a rotating sleeve for pressing the lifting column being fixedly provided on the rotating shaft of the central control reset pedal assembly.

[0013] Preferably, the rotating shaft of the above-mentioned central control reset pedal assembly is only set on one side, and the toggle sleeve set on the rotating shaft presses against the lifting column of one of the controllable brake casters, so that a group of central control reset foot pedal assemblies controls the brake of one controllable brake caster; or the central control reset foot pedal assembly is provided with a rotating shaft and a toggle sleeve fixed on the rotating shaft on both sides, and the toggle sleeves set on the two rotating shafts and the lifting columns on the two controllable brake casters respectively press against each other, so that a group of central control reset foot pedal assemblies controls the brakes of the two controllable brake casters; or the lifting columns of the two controllable brake casters at the rear of the platform plate and the two toggle sleeves fixed on a hexagonal rod press against each other, and the lifting columns of the two controllable brake casters at the front of the platform plate and the toggle sleeves on the rotating shafts on both sides of a central control reset foot pedal assembly press against each other, and the swing arms are respectively connected to the ends of the rotating shaft and the hexagonal rod, and a connecting rod is connected between the two swing arms, so that a group of central control reset foot pedal assemblies controls the brakes of four controllable brake casters.

[0014] The working method of the medical carrier of the present invention is characterized in that: when the foot pedal is stepped on, the shift block is driven to swing, thereby driving the slider to slide, so that the slider, the shift block and the rotating shaft are locked in a working position due to the mutual blocking action of the limiting groove and the rotor; when in a locked working position, the shift sleeve presses the lifting column, so that the controllable brake caster is in a braking state; when in an unlocked working position, the shift sleeve does not press the lifting column, so that the controllable brake caster is in a state where it can move freely.

[0015] When the rotating shaft of the central control reset foot pedal assembly is only provided on one side, one set of central control reset foot pedal assemblies controls the braking of one controllable braking caster wheel; when the central control reset foot pedal assemblies are provided on both sides, one set of central control reset foot pedal assemblies controls the braking of two controllable braking caster wheels; and one set of central control reset foot pedal assemblies controls the braking of four controllable braking caster wheels. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can also be obtained based on these drawings without creative efforts.

[0017] The central control reset foot pedal of the present invention and its combined connection method will be further described in detail below in conjunction with the drawings and specific implementation structures.

[0018] Figure 1 is a perspective view of the central control reset foot pedal assembly of the present invention;

[0019] Figure 2 is an exploded view of the central control reset foot pedal assembly of the present invention;

[0020] Figure 3 is a sectional view of the central control reset foot pedal assembly of the present invention;

[0021] Figure 4 is a perspective view of the groove housing of the present invention;

[0022] Figure 5 、 6 is a perspective view of the slider of the present invention;

[0023] Figure 7 is a perspective view of the rotor;

[0024] Figure 8 is a perspective view of the dial block;

[0025] Figure 9 is a perspective view of the rotating shaft;

[0026] Figure 10 、 11 is a perspective view of the abutting plate;

[0027] Figure 12 is a perspective view of the fixing block;

[0028] Figure 13 、 14 is a partial sectional view of the central control reset foot pedal assembly of the present invention;

[0029] Figure 15 This is a working diagram of the central control reset pedal assembly of the utility model;

[0030] Figure 16 This is a three-dimensional diagram of a set of central control reset pedal components controlling two casters of the utility model;

[0031] Figure 17 This is a three-dimensional diagram of a set of central control reset pedal components controlling four casters of the utility model;

[0032] Figure 18 The utility model is a three-dimensional diagram of a group of central control reset pedal components controlling one caster and a three-dimensional diagram of a group of central control reset pedal components controlling three casters.

[0033] In the figure: 01-reset area; 02-limiting area; 03-rotor turning area; 04-recessed groove; 05-protruding part; 1. foot pedal; 2-steering shaft; 2.1-stop pin; 2.2-fastening screw hole; 2.3 keyway; 2.4 blind hole; 2.5 retaining ring groove; 3-fastening screw; 4-large retaining ring; 5-small retaining ring; 6-cylindrical pin; 7-slider bearing; 8-slider; 8.1- Slider through-hole ;8.2-sink hole;8.3- Lug ;8.4-slider bearing hole;8.5-slider limiting groove;9-side fastening screw for support plate;10-support plate and guide rod fastening screw;11-support plate;11.1-side screw hole for support plate;11.2-support plate fixing hole;11.3-support plate and rubber pad fixing screw hole;12-rotor bearing;13-bearing pressing screw;14-gasket;15-rotor;15.1-V-groove;15.2-rotor bearing support surface step;15.3-rotor bearing cylindrical boss;15.4-rotor plane;16-slot housing;16.1-slot housing and cover fixing screw hole;16.2- Trough shell and fixing hole; 16.3-Trough shell bridge; 16.4-Gasket with holes superimposed on the bridge hole; 16.5-Rotor through hole; 16.6-Riveted nut at the bottom of the trough shell; 16.7-Trough shell side and abutment plate fixing hole; 17-Cover plate; 18-Support seat; 19-Support seat bearing; 20-Shift block; 20.1-Anti-rotation groove; 20.2-Fork groove; 20.3-Center hole; 21-Compression spring; 22-Guide rod; 23-Fixed block; 23.1-Fixed block fixing hole; 23.2-Fixed block blind hole; 24-Rubber pad; 25-Single-sided hexagonal rod; 26-Swing arm; 27-Connecting rod; 28-Hexagonal rod; 29-Platform plate; 30-Shift sleeve; 31-Lifting column; 32-Controllable brake caster. DETAILED DESCRIPTION

[0034] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Components of the embodiments of the present utility model described and illustrated in the accompanying drawings here can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed present utility model, but merely represents selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0036] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0037] In the description of the present utility model, it should be noted that, unless otherwise clearly defined and limited, the terms "arranged", "installed", "connected", and "coupled" should be construed broadly. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0038] The following will describe in detail some implementation structures of the present utility model with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0039] The central control reset pedal assembly of the present invention comprises a slot housing 16 and a slider 8 arranged in the slot housing, the center part of the slider 8 is provided with a slider limit slot 8.5 and a rotor 15 arranged in the slider limit slot, both ends of the rotor 15 pass through the slider limit slot 8.5 and are rotatably hinged on the slot housing 16, and a compression spring 21 is provided between one side wall of the slider and the slot housing, and the rotation axis of the rotor is perpendicular to the sliding direction of the slider. A shift block 20 is rotatably hinged on the slot housing, and the shift block 20 is fixedly connected to the rotation shaft 2 for outputting different rotation positions, one of the rotation positions of the rotation shaft 2 is a locking position. The lower end of the shift block 20 is connected to the slider 8, and the upper end of the shift block 20 is connected to the foot pedal 1. When the foot pedal is stepped on, the shift block 20 is driven to swing around its axis, thereby driving the slider 8 to slide, so that the slider 8, the shift block 20 and the rotation shaft 2 are locked in one position by the mutual blocking action of the limited slot 8.5 and the rotor 15.

[0040] During operation, when the foot pedal is stepped on, the shift block is driven to swing, which in turn drives the slider to slide, so that the slider, the shift block and the rotating shaft are locked in one position due to the mutual blocking action of the limiting groove and the rotor, thereby enabling the rotating shaft 2 to output different rotation positions. When in the locked position, the shift sleeve 30 on the rotating shaft 2 presses against the lifting column 31, so that the controllable brake caster 32 is in a braking state. When in the unlocked position, the shift sleeve 30 does not press against the lifting column 31, so that the controllable brake caster 32 is in a state where it can move freely.

[0041] The structure of the mutual locking of the limiting groove 8.5 and the rotor 15 is specifically realized. The rotor is cylindrical and has V-shaped grooves 15.1 on both sides of its cylindrical body. The slider limiting groove has a reset area 01, a limiting area 02 and a rotating rotor area 03. The reset area is rectangular, and the width of the reset area is larger than the long side of the rotor cross section, so that the rotation can be rotated within the reset area; the limiting area and the reset area are staggered in the width direction, and the width of the connection position between the limiting area and the reset area is smaller than the long side of the rotor cross section, so that the slider is blocked by the rotor and cannot slide at this connection position; the rotating rotor area has a recessed groove 04 and a pointed protrusion 05 adjacent to the recessed groove, so that when the slider slides and the rotor is in this area, the pointed protrusion that moves with the slider drives the rotor to rotate; when the rotor is in the reset area, the pedal is in an unpressed position opposite to the pedal, that is, the pedal and the rotating shaft are not locked (such as Figure 15 As shown in the upper left figure), the controllable brake caster 32 is in a state where it can move freely; when the rotor is in the limit zone, the foot pedal is in the middle position of the downward pressure, that is, the foot pedal and the rotating shaft are locked. At this time, the rotating shaft drives the dial sleeve 30 to press the lifting column 31 to achieve the brake of the caster (as shown in the upper left figure). Figure 15 When the rotor is in the rotating rotor area, the pedal is in the extreme downward position, that is, the pedal and the rotating shaft are not locked, so that the controllable brake caster 32 is in a state where it can move freely (such asFigure 15 as shown in the lower left and upper right figures).

[0042] The limiting area 02 is also the aforementioned locking station. That is, at this time, the slider 8, the shifting block 20, and the rotating shaft 2 are locked at this locking station due to the mutual jamming effect between the limiting groove 8.5 and the rotor 15 (mutually jammed in the limiting area 02). That is, at this time, the rotating shaft drives the rotating sleeve 30 to press against the lifting column 31 to realize the braking of the caster; the settings of the above-mentioned reset area 01, limiting area 02, and rotating rotor area 03 enable the operator to step on the foot pedal to the end once and then relax, the caster brakes, and the operator steps on the foot pedal to the end a second time and then relaxes, and the caster brake is unlocked.

[0043] For convenient independent use, a cover plate 17 is fixedly installed on the notch of the above-mentioned groove housing (the cover plate 17 is detachably connected to the platform plate 29 by bolts, etc.). A support seat 18 for rotatably hinging the rotating shaft is fixedly provided on the cover plate 17. The rotating shaft 2 passes through the central hole of the shifting block. A stop pin 2.1 is fixedly provided in the middle of the rotating shaft. A stop groove 20.1 for cooperating with the stop pin is provided in the central hole 20.3 of the shifting block 20. The stop groove 20.1 can penetrate the entire central hole of the shifting block 20. Its function is that after the stop pin 2.1 on the rotating shaft 2 is inserted, the two can rotate synchronously. That is, when the shifting block 20 rotates, it can drive the rotating shaft to rotate synchronously, and when the rotation of the shifting block 20 is restricted by the action of the slider, the rotating shaft is also restricted from rotating (this is the locking station at this time).

[0044] A pair of parallel and spaced lugs 8.3 are provided on the above-mentioned slider 8. The two ends of the cylindrical pin 6 are rotatably hinged by a slider bearing 7 on the two lugs. A fork groove 20.2 for engaging the cylindrical pin is provided at the lower part of the shifting block 20. When the shifting block swings, the slider is driven to slide through the cooperation of the fork groove and the cylindrical pin.

[0045] A fixed block 23 and a pressing plate 11 are provided in parallel on the opposite sides inside the above-mentioned groove housing. A guide rod 22 for guiding the sliding of the slider is provided between the fixed block and the pressing plate. A compression spring 21 is sleeved on the guide rod. The side surfaces of the slider 8 and the fixed block 23 (the opposite side surfaces of the two) are provided with counterbores. The two ends of the compression spring are pressed against the counterbores of the slider and the fixed block. Through the action of the compression spring, the slider 8, the shifting block 20, and the rotating shaft 2 have a tendency to reset (that is, to make the rotor in the reset area of the slider limiting groove), and the external force driving the slider 8, the shifting block 20, and the rotating shaft 2 comes from the operator stepping on the foot pedal.

[0046] A rotor through-hole 16.5 for the rotor to pass through is provided on the bottom plate of the above-mentioned groove housing 16. A groove housing bridge plate 16.3 is fixedly provided at the notch position of the groove housing. Step portions for sleeving bearings are provided at both ends of the rotor. A limit hole for limiting and fixing one end bearing of the rotor is provided on the groove housing bridge plate. The rotor through-hole 16.5 serves as a limit hole for limiting and fixing the other end bearing of the rotor. Screw holes are provided on the bottom plate beside the rotor through-hole 16.5. A gasket 14 capable of resisting the bearing is provided below the bottom plate. The gasket 14 is locked and fixed to the screw holes by screws, so that the rotor will not come out.

[0047] The pedal 1 is rectangular in shape, and one side portion thereof is fixedly connected to the upper end surface of the dial block, so that the pedal has a suspended portion extending out of the upper end of the dial block. By stepping on the suspended portion, it is beneficial to drive the dial block 20 to rotate.

[0048] The medical vehicle using the central control reset foot pedal assembly of the present utility model includes a platform plate 29 of the medical vehicle and four controllable brake casters 32 installed on the platform plate 29. The central control reset foot pedal assembly is detachably connected to the platform plate. The lifting column 31 for controlling the brake of the controllable brake caster passes through the platform plate 29 from bottom to top. A turning sleeve 30 for pressing against the lifting column is fixedly provided on the rotating shaft of the central control reset foot pedal assembly. The turning sleeve 30 is a cam structure. When the cam is at the apogee and abuts against the lifting column 31, the lifting column is pressed to realize the braking of the caster. When the cam is at the perigee and does not abut against the lifting column 31, the caster can move freely.

[0049] Applying the central control reset foot pedal assembly to a medical vehicle has various control methods, such as Figures 16 - 18 as shown, one set of central control reset foot pedal assemblies controls one caster, one set of central control reset foot pedal assemblies controls two casters, one set of central control reset foot pedal assemblies controls three casters, and one set of central control reset foot pedal assemblies controls four casters;

[0050] Specifically, the rotating shaft of the above-mentioned central control reset foot pedal assembly is only provided on one side. The turning sleeve provided on the rotating shaft abuts against the lifting column of one of the controllable brake casters to realize the braking of one controllable brake caster by one set of central control reset foot pedal assemblies;

[0051] Rotating shafts are provided on both sides of the central control reset foot pedal assembly, and turning sleeves 30 (the turning sleeves 30 can be installed on the unilateral hexagonal bars 25 installed on the rotating shafts) fixed on the rotating shafts. The turning sleeves provided on the two rotating shafts respectively abut against the lifting columns on the two controllable brake casters to realize the braking of two controllable brake casters by one set of central control reset foot pedal assemblies;

[0052] The lifting columns of the two controllable brake casters at the rear on the platform plate are pressed against two rotating sleeves fixedly arranged on a hexagonal bar 28, and the lifting columns of the two controllable brake casters at the front on the platform plate are pressed against the rotating sleeves on the bilateral rotating shaft of a central control reset foot pedal assembly. Swing arms 26 are respectively connected to the ends of the rotating shaft and the hexagonal bar, and a connecting rod 27 is connected between the two swing arms, so as to realize that a group of central control reset foot pedal assemblies control the braking of four controllable brake casters.

[0053] A rubber pad 24 is arranged on the inner side of the pressing plate 11 to play a role in buffering the slider. Support seat bearings 19 are sleeved at both ends of the rotating shaft 2 to realize the rotational hinge connection of the rotating shaft on the support seat 18. Snap ring grooves 2.5 are arranged at both ends of the rotating shaft. Snap rings 4 are clamped on the snap ring grooves 2.5 to limit the axial movement of the bearing. Small snap rings 5 are also arranged at both ends of the cylindrical pin 6 to limit the axial movement of the slider bearing.

[0054] The working method of the medical carrier of the present utility model is that when the foot pedal is stepped on, it drives the block to swing, and then drives the slider to slide, so that the slider, the block and the rotating shaft are locked at a working position under the mutual jamming action of the limiting groove and the rotor. When at a locked working position, the rotating sleeve presses against the lifting column, so that the controllable brake caster is in a braking state. When at an unlocked working position, the rotating sleeve does not press against the lifting column, so that the controllable brake caster is in a state where it can move freely.

[0055] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model.

Claims

1. A center control reset foot pedal assembly, characterized in that: It includes a groove housing and a slider disposed within the groove housing. A slider limiting groove and a rotor passing through the slider limiting groove are provided at the central portion of the slider. Both ends of the rotor are rotatably hinged to the groove housing. A compression spring is provided between one side wall surface of the slider and the groove housing. The rotation axis line of the rotor is perpendicular to the sliding direction of the slider. A dial is rotatably hinged to the groove housing. A rotating shaft for outputting different rotation stations is fixedly connected to the dial. The lower end of the dial is connected to the slider, and the upper end of the dial is connected to a foot pedal. When the foot pedal is stepped on, it drives the dial to swing, thereby driving the slider to slide, so that the slider, the dial, and the rotating shaft are locked at a station under the mutual jamming action of the limiting groove and the rotor.

2. The center control reset foot pedal assembly according to claim 1, characterized in that: The rotor is cylindrical and has V-shaped grooves on both sides of its cylinder. The slider limiting groove has a reset area, a limiting area, and a rotor turning area. The reset area is rectangular, and the width direction of the reset area is greater than the long side of the rotor cross-section, enabling rotation within the reset area; the limiting area is offset from the reset area in the width direction, and the width at the connection position between the limiting area and the reset area is less than the long side of the rotor cross-section, so that the slider is blocked by the rotor and cannot slide at this connection position; the rotor turning area has a concave groove and a convex portion adjacent to the concave groove, so that when the slider slides and the rotor is in this area, the rotor is turned by the convex portion; when the rotor is in the reset area, it is facing the foot pedal in the non-pressed position, that is, the foot pedal and the rotating shaft are not locked at a station; when the rotor is in the limiting area, the foot pedal is in the intermediate pressed position, that is, the foot pedal and the rotating shaft are locked at a station; when the rotor is in the rotor turning area, the foot pedal is in the extreme pressed position, that is, the foot pedal and the rotating shaft are not locked at a station.

3. The center control reset foot pedal assembly according to claim 1 or 2, characterized in that: A cover plate is fixedly installed on the groove opening of the groove housing. A support seat for rotatably hinging the rotating shaft is fixedly provided on the cover plate. The rotating shaft passes through the central hole of the dial. A rotation stop pin is fixedly provided in the middle of the rotating shaft, and a rotation stop groove channel matching the rotation stop pin is provided in the central hole.

4. The center control reset foot pedal assembly according to claim 1 or 2, characterized in that: A pair of convex ears are provided on the slider at parallel intervals. A cylindrical pin is provided on the convex ears. A fork groove into which the cylindrical pin is inserted is provided at the lower part of the dial. When the dial swings, the slider is driven to slide through the cooperation of the fork groove and the cylindrical pin.

5. The center control reset foot pedal assembly according to claim 1 or 2, characterized in that: A fixed block and a resisting plate are provided in parallel on opposite sides within the groove housing. A guide rod for guiding the sliding of the slider is provided between the fixed block and the resisting plate. The compression spring is sleeved on the guide rod. Counterbores are provided on the side surfaces of the slider and the fixed block, and both ends of the compression spring are pressed against the counterbores of the slider and the fixed block.

6. The center control reset foot pedal assembly according to claim 1 or 2, characterized in that: A rotor through hole for the rotor to pass through is provided on the bottom plate of the groove housing. A groove housing bridge plate is fixedly provided at the groove opening position of the groove housing. Step portions for sleeving bearings are provided at both ends of the rotor. A limiting hole for limiting and fixing one end bearing of the rotor is provided on the groove housing bridge plate, and the rotor through hole serves as a limiting hole for limiting and fixing the other end bearing of the rotor.

7. The center control reset foot pedal assembly according to claim 1 or 2, characterized in that: The foot pedal is rectangular, and one side portion thereof is fixedly connected to the upper end surface of the dial, so that the foot pedal has a suspended portion extending beyond the upper end of the dial.

8. A medical vehicle using the central control reset foot pedal assembly according to any one of claims 1-7, characterized in that: It includes a platform plate of a medical vehicle and four controllable brake casters installed on the platform plate. The central control reset foot pedal assembly is detachably connected to the platform plate. The lifting column for controlling the brake in the controllable brake caster passes through the platform plate from bottom to top, and a turning sleeve for pressing against the lifting column is fixedly provided on the rotating shaft of the central control reset foot pedal assembly.

9. The medical vehicle according to claim 8, wherein: The rotating shaft of the central control reset foot pedal assembly is only arranged on one side. The turning sleeve arranged on the rotating shaft presses against the lifting column of one of the controllable brake casters, so as to realize that one set of central control reset foot pedal assembly controls the brake of one controllable brake caster.

10. The medical vehicle according to claim 8, characterized in that: Rotating shafts and turning sleeves fixed on the rotating shafts are arranged on both sides of the central control reset foot pedal assembly. The turning sleeves arranged on the two rotating shafts respectively press against the lifting columns on the two controllable brake casters, so as to realize that one set of central control reset foot pedal assembly controls the brakes of the two controllable brake casters; or the lifting columns of the two rear controllable brake casters on the platform plate press against the two turning sleeves fixedly provided on a hexagonal bar, and the lifting columns of the two front controllable brake casters on the platform plate press against the turning sleeves on the bilateral rotating shafts of a central control reset foot pedal assembly. Swing arms are respectively connected to the ends of the rotating shaft and the hexagonal bar, and a connecting rod is connected between the two swing arms, so as to realize that one set of central control reset foot pedal assembly controls the brakes of the four controllable brake casters.

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