A pedal assembly, a central brake system and a medical device

Abstract

The present invention discloses a pedal assembly, a central brake system and a medical device, wherein the pedal assembly comprises: a base; a first support member arranged on the base; a pedal, which is arranged on the first support member and can swing relative to the first support member around its middle; a second support member fixed relative to the base; a drive shaft, which is rotatably arranged on the second support member, and one end of the drive shaft cooperates with the adjustment hole of the caster to achieve the locking and unlocking of the caster; and a transmission mechanism, wherein the power input end of the transmission mechanism receives the pedal driving force, the power output end of the transmission mechanism drives the drive shaft to rotate, and the transmission mechanism converts the swing of the pedal into the rotation of the drive shaft. When the foot pedal swings, the transmission mechanism converts the swing of the pedal into the rotation of the drive shaft, and the locking and unlocking of the caster are achieved through the rotation of the drive shaft. The noise reduction mechanism of the present invention achieves the purpose of reducing noise by slowing down the speed of the drive shaft or the transmission mechanism.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and more specifically, to a pedal assembly, a central brake system and medical equipment. Background Art

[0002] The central brake system is a control system that controls the braking or release of multiple casters at the same time through a set of brake mechanisms. It is easy to operate and is widely used in medical equipment. At present, the pedal assembly of the central brake system can be switched between braking and release by stepping on the pedal, but the current pedal assembly is noisy during operation.

[0003] Therefore, how to reduce the noise during the operation of the pedal assembly and conform to ergonomics is a problem that needs to be urgently solved by those skilled in the art. Summary of the invention

[0004] In view of this, the technical problem to be solved by the present invention is how to reduce the noise during the operation of the pedal assembly to conform to ergonomics. To this end, the present invention provides a pedal assembly, a central brake system and a medical device.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] A pedal assembly for a medical device, the medical device comprising a plurality of casters, the pedal assembly comprising:

[0007] a base for fixing to one of the plurality of said casters;

[0008] a first support member disposed on the base;

[0009] a pedal, the pedal being arranged on the first support member and being capable of swinging relative to the first support member about a middle portion thereof;

[0010] A second support member fixed relatively to the base;

[0011] A drive shaft, the drive shaft is rotatably disposed on the second support member, one end of the drive shaft cooperates with the adjustment hole of the caster to achieve locking and unlocking of the caster;

[0012] a transmission mechanism, wherein a power input end of the transmission mechanism receives the pedal driving force, a power output end of the transmission mechanism drives the drive shaft to rotate, and the transmission mechanism converts the swing of the pedal into the rotation of the drive shaft; and

[0013] A noise reduction mechanism is arranged on the drive shaft or the transmission mechanism to reduce the speed of the drive shaft and the transmission mechanism when rotating.

[0014] In one embodiment of the present invention, when the locking portion of the pedal receives a force in a fifth direction, the pedal rotates in a first direction; when the unlocking portion of the pedal receives a force in a sixth direction, the pedal rotates in a second direction, wherein the fifth direction and the sixth direction are in the same direction.

[0015] In one embodiment of the present invention, the rotation center line of the pedal is perpendicular to the rotation center line of the drive shaft.

[0016] In one embodiment of the present invention, the noise reduction mechanism includes a first damper or an elastic member. When the noise reduction mechanism includes the first damper, one end of the first damper is hinged to a part of the transmission mechanism, and the second end of the first damper can slide through the base;

[0017] When the noise reduction mechanism includes an elastic member, one end of the elastic member abuts against a portion of the transmission mechanism, and a second end of the elastic member abuts against the base.

[0018] In one embodiment of the present invention, the elastic member is a spring, silicone, polyurethane or sponge.

[0019] In one embodiment of the present invention, when the noise reduction mechanism includes an elastic member, the noise reduction mechanism also includes a guide rod, a first end of the guide rod is hinged to a part of the transmission mechanism, and a second end of the guide rod passes through the base and can be slidably engaged.

[0020] In one embodiment of the present invention, a cantilever rod is further provided between the base and the noise reduction mechanism.

[0021] In one embodiment of the present invention, the transmission mechanism comprises:

[0022] A first connecting rod with a first end rotatably disposed on an end surface of the pedal close to the first supporting member;

[0023] A first end of a first swing rod is rotatably disposed at a second end of the first connecting rod, and the second end of the first swing rod is fixed to the driving shaft.

[0024] In one embodiment of the present invention, one end of the first damper is hinged to the first end of the first swing rod.

[0025] In one embodiment of the present invention, the first swing arm and the driving shaft are an integral structure or a detachable structure.

[0026] In one embodiment of the present invention, the second end of the first swing rod is fixed to the driving shaft by a screw.

[0027] In one embodiment of the present invention, the transmission mechanism further includes a first shifting rod, a first end of which is fixed to an end surface of the pedal close to the first support member; and a second end of the first shifting rod is slidably disposed on a first end of the first connecting rod.

[0028] In one embodiment of the present invention, the first lever comprises: a mounting portion and an optical axis portion fixed to the pedal;

[0029] The first end of the first connecting rod is provided with a sleeve which is sleeved on the optical axis portion and slidably matched with the optical axis portion, and the second end of the first connecting rod is provided with an axial hole and a limiting hole for limiting the swing of the first swing rod;

[0030] The first end of the first swing arm is rotatably disposed at the second end of the first connecting rod via a first rotating shaft installed in the shaft hole.

[0031] In one embodiment of the present invention, the transmission mechanism comprises:

[0032] A second lever having a first end rotatably disposed on an end surface of the pedal close to the first support member;

[0033] A second swing rod is slidably disposed at a first end thereof at a second end of the second lever, and the second end of the second swing rod is fixed on the driving shaft.

[0034] In one embodiment of the present invention, the circumferential surface of the drive shaft on which the second rocker arm is mounted is a profiled surface, and the second rocker arm has a profiled hole that matches the profiled surface. The second rocker arm can drive the drive shaft to rotate through the matching of the profiled hole and the profiled surface.

[0035] In one embodiment of the present invention, the first end of the first damper is hinged to the first end of the second swing rod.

[0036] In one embodiment of the present invention, the pedal is rotatably disposed on the first support member via a second rotating shaft.

[0037] In one embodiment of the present invention, the pedal is fixed on the second rotating shaft, and the second rotating shaft is rotatably disposed on the first supporting member.

[0038] In one embodiment of the present invention, the pedal is detachably arranged on the second rotating shaft.

[0039] In one embodiment of the present invention, one of the end surface of the pedal close to the second rotating shaft and the second rotating shaft is provided with a buckle, and the other one is provided with a buckle matching with the buckle.

[0040] In one embodiment of the present invention, one of the end surface of the pedal close to the second rotating shaft and the second rotating shaft is provided with a positioning hole, and the other of the two is provided with a positioning column matched with the positioning hole.

[0041] In one embodiment of the present invention, a second damper is disposed between the first support member and the second rotating shaft.

[0042] In one embodiment of the present invention, the locking portion of the pedal is provided with a locking mark, and the unlocking portion of the pedal is provided with an unlocking mark.

[0043] In one embodiment of the present invention, a bearing is disposed between the second support member and the driving shaft.

[0044] In one embodiment of the present invention, the noise reduction mechanism further includes a third damper, and the third damper is disposed between the second support member and the driving shaft.

[0045] In one embodiment of the present invention, the first support member and the second support member are coaxially arranged or staggeredly arranged.

[0046] In one embodiment of the present invention, when the first support member and the second support member are coaxially arranged, the first support member and the second support member are an integrated structure.

[0047] The present invention also discloses a central braking system, comprising a base, casters arranged at four corners of the base and a pedal assembly as described above, wherein the four casters are a first caster and a second caster located at the front end, a third caster and a fourth caster located at the rear end, the first caster and the third caster are located in the same row, the second caster and the fourth caster are located in the same row, and the rotational motion of the drive shaft in the pedal assembly is transmitted to the adjustment hole of the first caster and the adjustment hole of the second caster.

[0048] In one embodiment of the present invention, the first end of the driving shaft is disposed in the adjustment hole of the first caster; and the second end of the driving shaft is disposed in the adjustment hole of the second caster.

[0049] In one embodiment of the present invention, the rotational movement of the driving shaft in the pedal assembly is transmitted to the adjustment hole of the first caster through the first transmission assembly.

[0050] In one embodiment of the present invention, the rotational movement of the driving shaft in the pedal assembly is transmitted to the adjustment hole of the second caster through the second transmission assembly.

[0051] In one embodiment of the present invention, it further includes a third transmission assembly for transmitting the rotational motion of the drive shaft to the adjustment hole of the third caster.

[0052] In one embodiment of the present invention, it further includes a fourth transmission assembly for transmitting the rotational motion of the drive shaft to the adjustment hole of the fourth caster.

[0053] The present invention also discloses a medical device, comprising a body and any one of the above central braking systems, wherein the body is arranged on a base of the central braking system.

[0054] It can be seen from the above scheme that when the pedal assembly of the present invention is used, when the foot pedal swings, the transmission mechanism converts the swing of the pedal into the rotation of the drive shaft, and the locking and unlocking of the caster are achieved through the rotation of the drive shaft. The present invention sets a noise reduction mechanism between the drive shaft and the base or the transmission mechanism and the base, and the noise reduction mechanism achieves the purpose of reducing noise by slowing down the rotation speed of the drive shaft or the transmission mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0056] Figure 1 A schematic diagram of the three-dimensional structure of a medical device provided by one embodiment of the present invention;

[0057] Figure 2 A schematic diagram of the three-dimensional structure of a central brake system provided by an embodiment of the present invention;

[0058] Figure 3 A three-dimensional structural schematic diagram of a central brake system provided by another embodiment of the present invention;

[0059] Figure 4 A three-dimensional structural schematic diagram of a central brake system provided by another embodiment of the present invention;

[0060] Figure 5 A schematic diagram of the three-dimensional structure of a pedal assembly provided by one embodiment of the present invention;

[0061] Figure 6 A schematic diagram of an exploded structure of a pedal assembly provided by another embodiment of the present invention;

[0062] Figure 7 A schematic diagram of an exploded structure of a pedal assembly provided by another embodiment of the present invention;

[0063] Figure 8A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0064] Fig. 9 for Figure 8 A side structural schematic diagram of a provided pedal assembly;

[0065] Fig.10 A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0066] Fig.11 for Fig.10 A side structural schematic diagram of a provided pedal assembly;

[0067] Fig.12 A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0068] Fig.13 for Fig.12 A side structural schematic diagram of a provided pedal assembly;

[0069] Fig.14 A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0070] Fig.15 for Fig.14 A side structural schematic diagram of a provided pedal assembly;

[0071] Fig.16 A schematic diagram of an exploded structure of a pedal assembly provided by another embodiment of the present invention;

[0072] Fig.17 A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0073] Fig.18 for Fig.17 A side structural schematic diagram of a provided pedal assembly;

[0074] Fig.19 A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0075] Fig. 20 for Fig.19 A side structural schematic diagram of a provided pedal assembly;

[0076] Fig.21 A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0077] Fig. 22 for Fig.21A side structural schematic diagram of a provided pedal assembly;

[0078] Fig.23 A schematic diagram of the front structure of a pedal assembly provided by another embodiment of the present invention;

[0079] Fig.24 for Fig.23 A side structural schematic diagram of a provided pedal assembly;

[0080] Fig.25 A three-dimensional structural schematic diagram of a pedal assembly provided by another embodiment of the present invention;

[0081] In the figure, 100 is a pedal assembly, 200 is a caster, 300 is a noise reduction mechanism, 400 is a base, 500 is a first transmission assembly, 600 is a second transmission assembly, 700 is a third transmission assembly, and 300 is a fourth transmission assembly;

[0082] 101 is a base, 102 is a first support member, 103 is a pedal, 104 is a second support member, 105 is a driving shaft, 106 is a transmission mechanism, 1021 is a second rotating shaft, 1022 is a positioning column, 1031 is a locking portion, 1032 is an unlocking portion, 1033 is a locking mark, 1034 is an unlocking mark, 1061 is a first connecting rod, 1062 is a first swing rod, 1063 is a first lever, 1064 is a second lever, 1065 is a second swing rod, 1061-1 is a sleeve, 1061-2 is an axis hole, 1061-3 is a limiting hole, 1061-4 is a first rotating shaft, 1063-1 is a mounting portion, and 1063-2 is an optical axis;

[0083] 201 is a first caster, 202 is a second caster, 203 is a third caster, and 204 is a fourth caster;

[0084] 301 is a first damper, 302 is an elastic member, 303 is a guide rod, 304 is a cantilever rod, and 305 is a damping pad. DETAILED DESCRIPTION

[0085] The core of the present invention is to provide a pedal assembly, a central brake system and a medical device to reduce the noise during the operation of the pedal assembly and conform to ergonomics.

[0086] In addition, the embodiments shown below do not limit the invention described in the claims in any way. In addition, all the contents of the configurations shown in the embodiments below are not limited to the solutions required as the invention described in the claims.

[0087] To do this, see Figure 1The medical device according to the embodiment of the present invention includes a main body 20 and a central braking system 10 , and the main body 20 is arranged on the base of the central braking system 10 .

[0088] The specific structure of the central brake system 10 is described in detail below:

[0089] See also Figure 2 The central brake system of an embodiment of the present invention includes a base 400, casters 200 arranged at four corners of the base 400, and a pedal assembly 100, wherein the four casters 200 are a first caster 201 and a second caster 202 located at the front end, a third caster 203 and a fourth caster 204 located at the rear end, the first caster 201 and the third caster 203 are located in the same row, and the second caster 202 and the fourth caster 204 are located in the same row, and the rotational motion of the drive shaft 105 in the pedal assembly 100 is transmitted to the adjustment hole of the first caster 201 and the adjustment hole of the second caster 202.

[0090] In the embodiment of the present invention, the rotational motion of the drive shaft 105 is transmitted to the adjustment hole of the first caster 201 and the adjustment hole of the second caster 202, so as to achieve simultaneous control of the locking and unlocking of the first caster 201 and the second caster 202. The first end of the drive shaft 105 directly matches the adjustment hole of the first caster 201, and the second end of the drive shaft 105 directly matches the adjustment hole of the second caster 202; or a first transmission assembly 500 is arranged between the drive shaft 105 and the first caster 201, and the second end of the drive shaft 105 directly matches the adjustment hole of the second caster 202; or the first end of the drive shaft 105 directly matches the adjustment hole of the first caster 201, and a second transmission assembly 600 is arranged between the drive shaft 105 and the second caster 202; or a first transmission assembly 500 is arranged between the drive shaft 105 and the first caster 201, and a second transmission assembly 600 is arranged between the drive shaft 105 and the second caster 202.

[0091] The above is an introduction to realizing synchronous locking and unlocking of the first caster 201 and the second caster 202 located at the front end. The central brake system of the present invention can also realize synchronous locking and unlocking of the three casters 200, taking the synchronous realization of the first caster 201, the second caster 202 and the third caster 203 as an example:

[0092] like Figure 3 As shown, a first transmission assembly 500 is arranged between the drive shaft 105 and the first caster 201, a second transmission assembly 600 is arranged between the drive shaft 105 and the second caster 202, and a third transmission assembly 700 is arranged between the drive shaft 105 and the third caster 203. The third transmission assembly 700 transmits the rotational motion of the drive shaft 105 to the adjustment hole of the third caster 203. The first transmission assembly 500 and the second transmission assembly 600 refer to the above embodiments.

[0093] like Figure 4 As shown, the central braking system of the present invention can also realize the synchronous locking and unlocking of the four casters 200, wherein a first transmission assembly 500 is arranged between the drive shaft 105 and the first caster 201, a second transmission assembly 600 is arranged between the drive shaft 105 and the second caster 202, a third transmission assembly 700 is arranged between the drive shaft 105 and the third caster 203, and a fourth transmission assembly 300 is arranged between the drive shaft 105 and the fourth caster 204. The fourth transmission assembly 300 transmits the rotational motion of the drive shaft 105 to the adjustment hole of the fourth caster 204. The first transmission assembly 500, the second transmission assembly 600 and the third transmission assembly 700 refer to the above embodiments.

[0094] It should be noted that the drive shaft 105 is a split structure or an integrated structure. When it is a split structure, the two can be connected by a coupling or other structures.

[0095] The specific structure of the pedal assembly 100 is described in detail below:

[0096] See also Figure 5 The pedal assembly 100 in the embodiment of the present invention is used for a medical device, the medical device includes a plurality of casters 200, and the pedal assembly 100 includes:

[0097] A base 101 for fixing on a caster 200 among the plurality of casters 200;

[0098] A first support member 102 disposed on the base 101;

[0099] A pedal 103, the pedal 103 is disposed on the first support member 102 and the pedal 103 can swing relative to the first support member 102 around its center;

[0100] A second support member 104 fixed relatively to the base 101;

[0101] A drive shaft 105, the drive shaft 105 is rotatably disposed on the second support member 104, one end of the drive shaft 105 cooperates with the adjustment hole of the caster 200 to achieve locking and unlocking of the caster 200;

[0102] A transmission mechanism 106, wherein a power input end of the transmission mechanism 106 receives a driving force from the pedal 103, and a power output end of the transmission mechanism 106 drives the drive shaft 105 to rotate, and the transmission mechanism 106 converts the swing of the pedal 103 into the rotation of the drive shaft 105; and

[0103] The noise reduction mechanism 300 is disposed on the drive shaft 105 or the transmission mechanism 106 and is used to reduce the speed of the transmission mechanism 106 when rotating.

[0104] When the foot pedal swings, the transmission mechanism converts the swing of the pedal into the rotation of the drive shaft, and the locking and unlocking of the caster are realized through the rotation of the drive shaft. The present invention sets a noise reduction mechanism between the transmission mechanism and the base, and the noise reduction mechanism achieves the purpose of reducing noise by slowing down the rotation speed of the drive shaft or the transmission mechanism. In addition, by adopting the pedal assembly of the present invention, the locking and unlocking switching can be realized by directly stepping on the locking part and the unlocking part of the pedal. The pedal integrates the two functions of locking and unlocking, occupies a small space, and is in line with ergonomics.

[0105] The function of the transmission mechanism 106 in the embodiment of the present invention is to convert the swing of the pedal 103 into the rotational movement of the drive shaft 105. For the convenience of description, the pedal 103 includes a locking part 1031 and an unlocking part 1032 located on both sides of the middle part; when the pedal 103 rotates in a first direction, the transmission mechanism 106 drives the drive shaft 105 to rotate in a third direction, thereby locking the caster 200; when the pedal 103 rotates in the second direction, the transmission mechanism 106 drives the drive shaft 105 to rotate in a fourth direction, thereby unlocking the caster 200, wherein the first direction is opposite to the second direction, and the third direction is opposite to the fourth direction.

[0106] When using the pedal assembly 100 of the present invention, when the locking portion 1031 of the foot pedal 103 is pressed, the pedal 103 rotates in a first direction relative to the first support member 102, and the driving force of the pedal 103 is transmitted to the power input end of the transmission mechanism 106, and the power output end of the transmission mechanism 106 drives the drive shaft 105 to rotate in a third direction, thereby locking the caster 200; when the unlocking portion 1032 of the foot pedal 103 is pressed, the pedal 103 rotates in a second direction relative to the first support member 102, and the driving force of the pedal 103 is transmitted to the power input end of the transmission mechanism 106, and the power output end of the transmission mechanism 106 drives the drive shaft 105 to rotate in a fourth direction, thereby unlocking the caster 200.

[0107] It should be noted that when the locking portion 1031 of the pedal 103 receives a force in the fifth direction, the pedal 103 rotates in the first direction; when the unlocking portion 1032 of the pedal 103 receives a force in the sixth direction, the pedal 103 rotates in the second direction, wherein the fifth direction and the sixth direction are in the same direction. Of course, it is not excluded that other force application methods can also make the pedal 103 rotate in the first direction and the second direction. When the unlocking portion 1032 receives a force opposite to the sixth direction, the pedal 103 rotates in the first direction, and when the locking portion 1031 receives a force opposite to the fifth direction, the pedal 103 rotates in the second direction to prevent rotation. The above force application methods are all based on the structural form of the pedal 103.

[0108] For the convenience of description, the forward direction of the caster 200 is taken as the front, the backward direction of the caster 200 is taken as the rear, and the two sides of the caster 200 are respectively left and right. Normally, the rotation direction of the drive shaft 105 is the same as the rotation direction of the caster 200. The rotation center line of the pedal 103 and the rotation center line of the drive shaft 105 are parallel to each other or neither parallel nor intersecting. When the rotation center line of the pedal 103 and the rotation center line of the drive shaft 105 are parallel to each other, the locking part 1031 and the unlocking part 1032 of the pedal 103 are located on both sides of the rotation center line of the pedal 103 and are arranged along the front-rear direction of the caster 200. When the rotation centerline of the pedal 103 and the rotation centerline of the drive shaft 105 are neither parallel nor intersecting, and in particular, when the rotation centerline of the pedal 103 and the rotation centerline of the drive shaft 105 are perpendicular, the locking portion 1031 and the unlocking portion 1032 of the pedal 103 are located on both sides of the rotation centerline of the pedal 103 and are arranged along the left and right directions of the caster 200. Under the action of the transmission mechanism 106, the driving force of the pedal is transmitted to the drive shaft 105 and the drive shaft 105 is rotated in the required direction, and the arrangement of the pedal directly determines the force application method when pedaling, for example, front and rear pedals, or left and right pedals, and of course, there can also be forms between front and rear pedals and left and right pedals, which are not listed here one by one.

[0109] The following detailed description is given by taking the case where the rotation center line of the pedal 103 is perpendicular to the rotation center line of the drive shaft 105 as an example:

[0110] As can be seen from the above description, the function of the noise reduction mechanism 300 is to slow down the speed of the drive shaft 105 and / or the transmission mechanism 106. Therefore, the specific structure of the drive shaft 105 and the transmission mechanism 106 determines the setting position and setting form of the noise reduction mechanism 300:

[0111] See also Figure 5 The noise reduction mechanism 300 in the embodiment of the present invention includes a damping pad 305, which is arranged on the base 101 and frictionally cooperates with the driving shaft 105 to slow down the rotation speed of the driving shaft 105. The damping pad 305 is detachably arranged on the base 101. When the damping pad 305 is severely worn, the purpose of slowing down the driving shaft 105 can be ensured by replacing the damping pad 305.

[0112] The above noise reduction mechanism 300 cooperates with the drive shaft 105 to achieve the purpose of noise reduction. The cooperation between the noise reduction mechanism 300 and the transmission mechanism 106 is related to the specific structure of the transmission mechanism 106. The specific structure of the noise reduction mechanism 300 will be described in detail in combination with the specific structure of the transmission mechanism 106.

[0113] See also Figure 6 and Figure 7The transmission mechanism 106 in the embodiment of the present invention comprises: a first connecting rod 1061 whose first end is rotatably disposed on the end surface of the pedal 103 close to the first support member 102; a first swing rod 1062 whose first end is rotatably disposed on the second end of the first connecting rod 1061, and whose second end is fixed on the driving shaft 105. The first connecting rod 1061 serves as the power input end of the transmission mechanism 106, and the first swing rod 1062 serves as the power output end of the transmission mechanism 106.

[0114] When the locking portion 1031 receives the force in the fifth direction, the pedal 103 rotates in the first direction, thereby driving the first end of the first connecting rod 1061 to move toward the direction close to the base 101. At the same time, the second end of the first connecting rod 1061 pushes the first end of the first swing rod 1062 to have a tendency to move toward the direction close to the base 101, so that the second end of the first swing rod 1062 pushes the driving shaft 105 to rotate in the third direction, thereby completing the locking of the caster 200; when the unlocking portion 1032 receives the force in the sixth direction, the pedal 103 rotates in the second direction, thereby driving the first end of the first connecting rod 1061 to move away from the base 101. At the same time, the second end of the first connecting rod 1061 pushes the first end of the first swing rod 1062 to have a tendency to move away from the base 101, so that the second end of the first swing rod 1062 pushes the driving shaft 105 to rotate in the fourth direction, thereby completing the unlocking of the caster 200.

[0115] The first swing arm 1062 and the drive shaft 105 are an integrated structure or a detachable structure. When it is an integrated structure, the first swing arm 1062 is welded to the drive shaft 105; when it is a detachable structure, the second end of the first swing arm 1062 is fixed to the drive shaft 105 by a screw, a pin, or the like in a detachable manner.

[0116] The first end of the first connecting rod 1061 is rotatably arranged on the end surface of the pedal 103 close to the base 101, for example, the end surface corresponding to the unlocking portion 1032, or the end surface corresponding to the locking portion 1031, wherein the specific corresponding unlocking portion 1032 or the locking portion 1031 is adjusted according to the specific usage habits. The above-mentioned rotatable arrangement mode can be a hinge, shaft connection, ball joint and other connection forms.

[0117] See also Figure 8 The embodiment of the present invention is different from the above embodiments in that the transmission mechanism 106 also includes a first lever 1063, a first end of the first lever 1063 is fixed on the end surface of the pedal 103 close to the first support member 102; the second end of the first lever 1063 is slidably disposed on the first end of the first connecting rod 1061.

[0118] The first end of the first lever 1063 is fixed to the end surface of the pedal 103 close to the first support member 102 by screws or other structures. The first lever 1063 includes: a mounting portion 1063-1 fixed to the pedal 103 and an optical axis portion 1063-2; a sleeve 1061-1 is provided at the first end of the first connecting rod 1061, which is sleeved on the optical axis portion 1063-2 and slidably matched with the optical axis portion 1063-2; an axial hole 1061-2 and a limiting hole 1061-3 for limiting the swing of the first swing rod 1062 are provided at the second end of the first connecting rod 1061; and the first end of the first swing rod 1062 is rotatably provided at the second end of the first connecting rod 1061 through a first rotating shaft 1061-4 installed in the axial hole 1061-2.

[0119] When the pedal 103 rotates in the first direction, the first lever 1063 drives the first connecting rod 1061 to receive the fifth direction force toward the locking portion 1031 of the power base 101, and the pedal 103 rotates in the first direction, driving the first lever 1063 to move away from the base 101; the first lever 1063 drives the first end of the first connecting rod 1061 to move toward the base 101, and at the same time, the second end of the first connecting rod 1061 pushes the first end of the first swing rod 1062 to move toward the base 101, so that the second end of the first swing rod 1062 pushes the driving shaft 105 It rotates in the third direction, thereby completing the locking of the caster 200; when the unlocking portion 1032 receives the force in the sixth direction, the pedal 103 rotates in the second direction, driving the first lever 1063 to move away from the base 101; the first lever 1063 drives the first end of the first connecting rod 1061 to move away from the base 101, and at the same time, the second end of the first connecting rod 1061 pushes the first end of the first swing rod 1062 to have a tendency to move away from the base 101, so that the second end of the first swing rod 1062 pushes the drive shaft 105 to rotate in the fourth direction, thereby completing the unlocking of the caster 200.

[0120] The noise reduction mechanism 300 is used to reduce the speed of the transmission mechanism 106 during rotation, thereby achieving the purpose of noise reduction. Fig. 9 and Fig.10 The noise reduction mechanism 300 of the embodiment of the present invention includes a first damper 301 , one end of the first damper 301 is hinged to a part of the transmission mechanism 106 , and the second end of the first damper 301 can slide through the base 101 .

[0121] Specifically, the first end of the first damper 301 is hinged to the first end of the first connecting rod 1061, and the second end of the first damper 301 passes through the base 101; or the first end of the first damper 301 is hinged to the first end of the first rocker rod 1062, and the second end of the first damper 301 passes through the base 101; or the first end of the first damper 301 is hinged to the first end of the first connecting rod 1061 and the first end of the first rocker rod 1062 at the same time, and the second end of the first damper 301 passes through the base 101.

[0122] The second end of the first damper 301 directly passes through the base 101 and is limitedly supported by the base 101. Alternatively, a cantilever rod 304 is provided on the base 101, and the second end of the first damper 301 is limitedly supported by the cantilever rod 304. Fig.11 and Fig.12 , the first end of the first damper 301 is hinged to the first end of the first swing rod 1062, and the second end of the first damper 301 passes through the cantilever rod 304. Alternatively, the first end of the first damper 301 is hinged to the first end of the first connecting rod 1061, and the second end of the first damper 301 passes through the cantilever rod 304. Alternatively, the first end of the first damper 301 is hinged to the first end of the first swing rod 1062 and the first end of the first connecting rod 1061 at the same time, and the second end of the first damper 301 passes through the cantilever rod 304.

[0123] The above noise reduction mechanism 300 includes a first damper 301. In the embodiment of the present invention, an elastic member 302 may be further provided to reduce the speed of the transmission mechanism 106 through the buffering effect of the elastic member 302 to achieve the purpose of noise reduction. Fig.13 and Fig.14 The first end of the elastic member 302 abuts against the first end of the first connecting rod 1061, and the second end of the elastic member 302 abuts against the base 101; or the first end of the elastic member 302 abuts against the first end of the first swing rod 1062, and the second end of the elastic member 302 abuts against the base 101; or the first end of the elastic member 302 abuts against the first end of the first connecting rod 1061 and the first end of the first swing rod 1062 at the same time, and the second end of the elastic member 302 abuts against the base 101. The elastic member 302 is a spring, silicone, polyurethane or sponge.

[0124] Furthermore, in order to prevent the elastic member 302 from getting stuck or moving during operation, the noise reduction mechanism 300 also includes a guide rod 303, the first end of which is hinged to a part of the transmission mechanism 106, and the second end of the guide rod 303 passes through the base 101 and can be slidably engaged.

[0125] The second end of the elastic member 302 is directly in contact with the base 101 and is supported by the base 101; or a cantilever rod 304 is provided on the base 101 to support the second end of the elastic member 302 by the cantilever rod 304. Fig.15 and Fig.16 .

[0126] By providing the first damper 301 or the elastic member 302 , the speed of the transmission mechanism 106 during transmission can be slowed down, thereby achieving the purpose of reducing noise.

[0127] See also Fig.17 The transmission mechanism 106 in the embodiment of the present invention comprises: a second lever 1064 whose first end is rotatably disposed on the end surface of the pedal 103 close to the first support member 102; a second swing rod 1065 whose first end is slidably disposed on the second end of the second lever 1064, and whose second end is fixed to the driving shaft 105. The second lever 1064 serves as the power input end of the transmission mechanism 106, and the second swing rod 1065 serves as the power output end of the transmission mechanism 106.

[0128] When the locking portion 1031 receives the force in the fifth direction, the pedal 103 rotates in the first direction, thereby driving the first end of the second lever 1064 to move toward the direction close to the base 101 and rotate simultaneously. At the same time, the first end of the second swing arm 1065 moves toward the direction close to the base 101 under the action of the second end of the second lever 1064, and finally drives the drive shaft 105 to rotate in the third direction, thereby completing the locking of the caster 200; when the unlocking portion 1032 receives the force in the sixth direction, the pedal 103 rotates in the second direction, thereby driving the first end of the second lever 1064 to move toward the direction away from the base 101 and rotate simultaneously. At the same time, the first end of the second swing arm 1065 moves toward the direction away from the base 101 under the action of the second end of the second lever 1064, and finally drives the drive shaft 105 to rotate in the third direction, thereby completing the locking of the caster 200.

[0129] The second end of the second swing rod 1065 is directly fixed on the drive shaft 105, for example, in a detachable connection mode or a non-detachable connection mode, wherein the non-detachable mode is, for example, welding; in the detachable connection mode, the peripheral surface of the drive shaft 105 on which the second swing rod 1065 is mounted is a profiled surface, and the second swing rod 1065 has a profiled hole that matches the profiled surface, and the second swing rod 1065 can drive the rotation of the drive shaft 105 through the cooperation of the profiled hole and the profiled surface. The above-mentioned profiled surface is distinguished from a cylindrical surface, and can be a triangular prism surface, a quadrangular prism surface, a pentagonal prism surface, and the like.

[0130] See also Fig.18 and Fig.19The noise reduction mechanism 300 of the embodiment of the present invention includes a first damper 301, one end of the first damper 301 is hinged to a part of the transmission mechanism 106, and the second end of the first damper 301 can slide through the base 101. Specifically, the first end of the first damper 301 is hinged to the first end of the second swing rod 1065, and the second end of the first damper 301 passes through the base 101.

[0131] The second end of the first damper 301 directly passes through the base 101 and is limitedly supported by the base 101. Alternatively, a cantilever rod 304 is provided on the base 101, and the second end of the first damper 301 is limitedly supported by the cantilever rod 304. Fig. 20 and Fig.21 The first end of the first damper 301 is hinged to the first end of the second swing rod 1065 , and the second end of the first damper 301 passes through the cantilever rod 304 .

[0132] The above noise reduction mechanism 300 includes a first damper 301. In the embodiment of the present invention, an elastic member 302 may be further provided to reduce the speed of the transmission mechanism 106 through the buffering effect of the elastic member 302 to achieve the purpose of noise reduction. Fig. 22 and Fig.23 The first end of the elastic member 302 abuts against the first end of the second swing rod 1065, and the second end of the elastic member 302 abuts against the base 101; the second end of the elastic member 302 abuts against the base 101. The elastic member 302 is a spring, silicone, polyurethane or sponge.

[0133] Furthermore, in order to prevent the elastic member 302 from getting stuck or moving during operation, the noise reduction mechanism 300 also includes a guide rod 303, the first end of which is hinged to a part of the transmission mechanism 106, and the second end of the guide rod 303 passes through the base 101 and can be slidably engaged.

[0134] The second end of the elastic member 302 is directly in contact with the base 101 and is supported by the base 101; or a cantilever rod 304 is provided on the base 101 to support the second end of the elastic member 302 by the cantilever rod 304. Fig.24 and Fig.25 .

[0135] In the embodiment of the present invention, the first support member 102 functions to support the pedal 103, and the pedal 103 is rotatably arranged on the first support member 102, for example, the pedal 103 is rotatably arranged on the first support member 102 via the second rotating shaft 1021. The rotatable arrangement on the first support member 102 via the second rotating shaft 1021 may be that the second rotating shaft 1021 is relatively fixed to the first support member 102, and the pedal 103 is provided with an axis hole 1061-2 that rotates relative to the second rotating shaft 1021; or the second rotating shaft 1021 is rotatably arranged on the first support member 102, and the pedal 103 is fixed on the second rotating shaft 1021. The pedal 103 is detachably arranged on the second rotating shaft 1021, or the pedal 103 is non-detachably arranged on the second rotating shaft 1021.

[0136] Among them, the non-detachable method adopts welding or an integrated structure. In the detachable method: one of the end surface of the pedal 103 close to the second rotating shaft 1021 and the second rotating shaft 1021 is provided with a buckle, and the other is provided with a buckle that matches the buckle; or one of the end surface of the pedal 103 close to the second rotating shaft 1021 and the second rotating shaft 1021 is provided with a positioning hole, and the other is provided with a positioning column 1022 that matches the positioning hole. For the convenience of distinction, the locking part 1031 of the pedal 103 is provided with a locking mark 1033, and the unlocking part 1032 of the pedal 103 is provided with an unlocking mark 1034. Among them, the above-mentioned locking mark 1033 and unlocking mark 1034 are directly engraved on the corresponding part of the pedal 103, or are pasted on the corresponding part of the pedal 103 by pasting.

[0137] The noise reduction mechanism 300 in the embodiment of the present invention further includes a second damper, which is disposed between the first support member 102 and the second rotating shaft. The second damper can be provided to slow down the speed of the pedal 103 during operation, thereby achieving the purpose of reducing noise.

[0138] The second support member 104 is used to support the drive shaft 105, wherein a bearing is provided between the second support member 104 and the drive shaft 105 in order to reduce the friction force during the rotation between the second support member 104 and the drive shaft 105. The noise reduction mechanism 300 in the embodiment of the present invention further includes a third damper, which is provided between the second support member 104 and the drive shaft 105.

[0139] Since the first support member 102 is used to support the pedal 103, and the second support member 104 is used to support the drive shaft 105, the first support member 102 and the second support member 104 are coaxially arranged or staggered. When the first support member 102 and the second support member 104 are coaxially arranged, the first support member 102 and the second support member 104 are an integrated structure. The first support member 102 is arranged on the base 101, and the second support member 104 can be arranged on the base 101 or on other components fixed relative to the base 101.

[0140] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0141] Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0142] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pedal assembly for a medical device, the medical device comprising a plurality of casters, characterized in that: The pedal assembly comprises: a base for fixing to one of the plurality of said casters; a first support member disposed on the base; a pedal, the pedal being arranged on the first support member and being capable of swinging relative to the first support member about a middle portion thereof; A second support member fixed relatively to the base; A drive shaft, the drive shaft is rotatably disposed on the second support member, one end of the drive shaft cooperates with the adjustment hole of the caster to achieve locking and unlocking of the caster; a transmission mechanism, wherein a power input end of the transmission mechanism receives the pedal driving force, a power output end of the transmission mechanism drives the drive shaft to rotate, and the transmission mechanism converts the swing of the pedal into the rotation of the drive shaft; and A noise reduction mechanism is arranged on the drive shaft or the transmission mechanism to slow down the speed of rotation of the drive shaft and the transmission mechanism; the noise reduction mechanism includes a damping pad, a first damper or an elastic member. When the noise reduction mechanism includes a damping pad, the damping pad is arranged on the base and frictionally cooperates with the drive shaft to slow down the rotation speed of the drive shaft; when the noise reduction mechanism includes a first damper, one end of the first damper is hinged to a part of the transmission mechanism, and the second end of the first damper can slide through the base; when the noise reduction mechanism includes an elastic member, one end of the elastic member abuts against a part of the transmission mechanism, and the second end of the elastic member abuts against the base.

2. The pedal assembly according to claim 1, wherein: The pedal includes a locking part and an unlocking part on both sides. When the locking part of the pedal receives a force in the fifth direction, the pedal rotates in the first direction, and the transmission mechanism drives the drive shaft to rotate in the third direction, thereby locking the caster; when the pedal rotates in the second direction; when the unlocking part of the pedal receives a force in the sixth direction, the pedal rotates in the second direction, and the transmission mechanism drives the drive shaft to rotate in the fourth direction, thereby unlocking the caster, wherein the first direction is opposite to the second direction, the third direction is opposite to the fourth direction, and the fifth direction is the same direction as the sixth direction.

3. The pedal assembly according to claim 1, wherein: The pedal rotation center line is perpendicular to the drive shaft rotation center line.

4. The pedal assembly according to claim 1, wherein: The elastic member is a spring, silicone, polyurethane or sponge.

5. The pedal assembly according to claim 1, wherein: When the noise reduction mechanism includes an elastic member, the noise reduction mechanism further includes a guide rod, a first end of the guide rod is hinged to a part of the transmission mechanism, and a second end of the guide rod passes through the base and can be slidably engaged.

6. The pedal assembly according to claim 1, wherein: When the noise reduction mechanism includes an elastic member, a cantilever rod is further provided between the base and the noise reduction mechanism.

7. The pedal assembly according to claim 1, wherein: The transmission mechanism comprises: A first connecting rod with a first end rotatably disposed on an end surface of the pedal close to the first supporting member; A first end of a first swing rod is rotatably disposed at a second end of the first connecting rod, and the second end of the first swing rod is fixed to the driving shaft.

8. The pedal assembly according to claim 7, wherein: One end of the first damper is hinged to the first end of the first swing rod.

9. The pedal assembly according to claim 7, wherein: The first swing arm and the driving shaft are an integrated structure or a detachable structure.

10. The pedal assembly according to claim 7, wherein: The second end of the first swing rod is fixed to the driving shaft by a screw.

11. The pedal assembly according to claim 7, wherein: The transmission mechanism further comprises a first shifting rod, a first end of which is fixed on an end surface of the pedal close to the first supporting member; and a second end of the first shifting rod is slidably disposed on the first end of the first connecting rod.

12. The pedal assembly according to claim 11, wherein: The first lever comprises: a mounting portion and an optical axis portion fixed to the pedal; The first end of the first connecting rod is provided with a sleeve which is sleeved on the optical axis portion and slidably matched with the optical axis portion, and the second end of the first connecting rod is provided with an axial hole and a limiting hole for limiting the swing of the first swing rod; The first end of the first swing arm is rotatably disposed at the second end of the first connecting rod via a first rotating shaft installed in the shaft hole.

13. The pedal assembly according to claim 1, wherein: The transmission mechanism comprises: A second lever having a first end rotatably disposed on an end surface of the pedal close to the first support member; A second swing rod is slidably disposed at a first end thereof at a second end of the second lever, and the second end of the second swing rod is fixed on the driving shaft.

14. The pedal assembly according to claim 13, wherein: The peripheral surface of the drive shaft on which the second swing arm is mounted is a profiled surface, and the second swing arm has a profiled hole that matches the profiled surface. The second swing arm can drive the drive shaft to rotate through the matching of the profiled hole and the profiled surface.

15. The pedal assembly according to claim 14, wherein: The first end of the first damper is hinged to the first end of the second swing rod.

16. The pedal assembly of claim 1, wherein: The pedal is rotatably arranged on the first support member via a second rotating shaft.

17. The pedal assembly according to claim 16, wherein: The pedal is fixed on the second rotating shaft, and the second rotating shaft is rotatably arranged on the first supporting member.

18. The pedal assembly of claim 17, wherein: The pedal is detachably arranged on the second rotating shaft.

19. The pedal assembly of claim 18, wherein: One of the end surface of the pedal close to the second rotating shaft and the second rotating shaft is provided with a buckle, and the other of the two is provided with a buckle matched with the buckle.

20. The pedal assembly of claim 18, wherein: One of the end surface of the pedal close to the second rotating shaft and the second rotating shaft is provided with a positioning hole, and the other of the two is provided with a positioning column matched with the positioning hole.

21. The pedal assembly of claim 19, wherein: A second damper is arranged between the first support member and the second rotating shaft.

22. The pedal assembly of claim 1, wherein: The locking portion of the pedal is provided with a locking mark, and the unlocking portion of the pedal is provided with an unlocking mark.

23. The pedal assembly of claim 1, wherein: A bearing is arranged between the second support member and the driving shaft.

24. The pedal assembly of claim 1, wherein: The noise reduction mechanism further includes a third damper disposed between the second support member and the drive shaft.

25. The pedal assembly of claim 1, wherein: The first support member and the second support member are coaxially arranged or staggeredly arranged.

26. The pedal assembly of claim 21, wherein: When the first support member and the second support member are coaxially arranged, the first support member and the second support member are an integrated structure.

27. A central braking system, characterized in that: It includes a base, casters arranged at four corners of the base and a pedal assembly as described in any one of claims 1 to 26, wherein the four casters are a first caster and a second caster located at the front end, a third caster and a fourth caster located at the rear end, the first caster and the third caster are located in the same row, the second caster and the fourth caster are located in the same row, and the rotational movement of the drive shaft in the pedal assembly is transmitted to the adjustment hole of the first caster and the adjustment hole of the second caster.

28. The central brake system according to claim 27, characterized in that: The first end of the driving shaft is arranged in the adjustment hole of the first caster; the second end of the driving shaft is arranged in the adjustment hole of the second caster.

29. The central brake system according to claim 27, characterized in that: The rotational movement of the driving shaft in the pedal assembly is transmitted to the adjustment hole of the first caster through the first transmission assembly.

30. The central brake system according to claim 27, characterized in that: The rotational movement of the driving shaft in the pedal assembly is transmitted to the adjustment hole of the second caster through the second transmission assembly.

31. The central brake system according to claim 27, characterized in that: It also includes a third transmission assembly for transmitting the rotational motion of the drive shaft to the adjustment hole of the third caster.

32. The central brake system according to claim 27, characterized in that: It also includes a fourth transmission assembly that transmits the rotational motion of the drive shaft to the adjustment hole of the fourth caster.

33. A medical device, characterized in that: It comprises a main body and a central brake system as described in any one of claims 27 to 32, wherein the main body is arranged on a base of the central brake system.

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