A wheel central control system and a trolley type movable medical device

Abstract

The application discloses a kind of wheel central control system and pushcart type movable medical equipment, it includes: brake castor, brake main shaft, brake pedal is driven brake main shaft rotation by brake shift fork;Brake castor state holding mechanism for limiting brake shift fork position includes: movable member and fixed member can be relatively moved and automatically reset, and brake pedal is driven movable member to move by brake shift fork, one of movable member and fixed member is hinged with brake pull rod, and the other has guiding special-shaped groove, guiding special-shaped groove can guide the movement of brake pull rod.It can be known by the above process that operator only needs to step the same pedal, i.e. brake state and free state can be switched, so that the operation mode is simple and convenient;And the same direction of stepping, need not hook foot, just by the different number of times of stepping to realize the switching of state, so that the control mode is simple and convenient.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a wheeled central control system and a trolley-type mobile medical device. Background Technology

[0002] During use, mobile medical equipment such as ultrasound diagnostic equipment, anesthetics, and hospital beds require medical staff to stably park them in a specific location or keep them moving in a straight line. Unlike the traditional method of controlling the brakes and releases of each caster individually, the central control system can simultaneously control two or more casters to be in free, straight-line, or braked states.

[0003] Currently, central control systems are mainly divided into two types: dual-pedal and single-pedal. Dual-pedal control systems use one pedal to control the caster brake and another to release the brake; both pedals are always in a state where one is depressed and the other is released, which can easily confuse the operator. Single-pedal control systems use a single pedal to brake or release the caster through different actuation methods: 1. Using a seesaw-like mechanism to control the pedal's forward and backward rotation to brake and release the caster; this method results in a large ankle movement arc and forward tilt angle, making operation inconvenient; 2. Utilizing a simple lever principle, using a foot pedal and a foot hook to control the brake and release the caster; this method requires considerable effort and may scratch the operator's instep, failing to meet ergonomic requirements.

[0004] Therefore, providing a wheel central control system that simplifies and facilitates control is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] In view of this, the present invention provides a wheel central control system to simplify and facilitate control. Furthermore, the present invention also provides a pushcart-type mobile medical device with an upper wheel central control system.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A wheel central control system, characterized in that it comprises:

[0008] A support plate is installed with a brake caster and a brake spindle. The brake spindle rotates in conjunction with the brake caster. During the rotation of the brake spindle in a first direction, the brake caster switches from a free state to a braking state. During the rotation of the brake spindle in a second direction, the brake caster switches from a braking state to a free state. The first direction and the second direction are opposite.

[0009] A brake pedal, wherein the brake pedal drives the brake spindle to rotate in the first direction via a brake shift fork;

[0010] A brake caster state retention mechanism for limiting the position of the brake fork includes a movable member and a fixed member capable of relative movement and automatic reset. The movable member moves synchronously with the brake fork in the rotation plane of the brake fork, and the movable member and the fixed member are connected by a linkage locking structure. When the movable member moves relative to the fixed member to a first position, the linkage locking structure locks the movable member, and the brake caster remains in a braked state. When the movable member moves relative to the fixed member to a second position, the linkage locking structure locks the movable member, and the brake caster remains in a free state.

[0011] Preferably, in the above-mentioned wheel central control system, the linkage locking structure includes:

[0012] A brake lever hinged to one of the moving member and the fixed member, and a guide groove provided on the other, wherein the brake lever has a protrusion that mates with and slides along the guide groove; the guide groove includes an initial position, a first proximal position, a limiting position, and a second proximal position that are sequentially connected to form the guide groove, and the initial position and the second proximal position are connected.

[0013] When the brake pedal is first pressed, the brake pedal moves the moving member via the brake fork, causing the protrusion of the brake lever to move from the initial position to the first proximal position. At the same time, the brake pedal rotates the brake spindle along the first direction via the brake fork until the brake caster is in the braking state. After the brake pedal is released, the moving member returns to its original position, causing the protrusion of the brake lever to move from the first proximal position to the limiting position and lock at the limiting position, thereby locking the moving member in the first position and keeping the brake caster in the braking state.

[0014] When the brake pedal is pressed again, the brake lever moves from the limiting end position to the second proximal position under the action of the brake fork; after the brake pedal is released, the moving part resets and moves, causing the brake lever to move from the second proximal position to the initial position. At the same time, the moving part moves to the second position, and the brake fork rotates through the action of the moving part, driving the brake spindle to rotate along the second direction until the brake caster is in a free state.

[0015] Preferably, in the above-described wheel central control system, the limiting end is located between the first proximal end and the second proximal end, and the limiting end is closer to the initial position than the first proximal end and the second proximal end, so that the limiting end forms a recessed position.

[0016] Preferably, in the above-described wheel central control system, the first channel connecting the initial position and the first proximal position is a bent channel protruding away from the second proximal position, and the channel connecting the first proximal position and the limiting position is a second channel, with a guide surface at the connection between the first channel and the second channel guiding towards the second channel; the channel connecting the limiting position and the second proximal position is a third channel, with a guide surface at the connection between the second channel and the third channel guiding towards the third channel; the fourth channel connecting the second proximal position and the initial position is a bent channel, with a guide surface at the connection between the third channel and the fourth channel guiding towards the fourth channel.

[0017] Preferably, in the above-mentioned wheel central control system, the guide groove is provided on the moving member, and the brake lever is hinged to the fixed member.

[0018] Preferably, in the above-mentioned wheel central control system, one end of the brake fork is fixedly connected to the brake pedal, and the other end abuts against the moving part. The brake spindle passes through the brake fork, and the brake fork can drive the brake spindle to rotate through a limiting engagement with the brake spindle.

[0019] Preferably, in the above-mentioned wheel central control system, the brake spindle and the brake fork are stopped by a limiting pin.

[0020] Preferably, in the above-described wheel central control system, the moving part is provided with a lever pin, and the end of the brake fork has an open fork that can cover the surface of the lever pin.

[0021] Preferably, in the above-mentioned wheel central control system, the fixing member is provided with a guide groove, and the moving member moves along the guide groove.

[0022] Preferably, in the above-described wheel central control system, the brake caster state holding mechanism further includes a guide component for guiding the movement of the moving part relative to the fixed part.

[0023] Preferably, in the above-described wheel central control system, the guiding component includes:

[0024] A guide shaft, on which the movable component is slidably mounted;

[0025] A fixed base and a guide shaft support are used to support the guide shaft, and the movable member moves between the fixed base and the guide shaft support.

[0026] Preferably, in the above-mentioned wheel central control system, the guide shaft support is fixed to the first end of the fixing member, and the fixing seat is fixed to the second end of the fixing member;

[0027] The brake lever is hinged to the fixed base.

[0028] Preferably, in the above-described wheel central control system, the guiding component further includes:

[0029] A guide sleeve is sleeved on the outside of the guide shaft; and the guide sleeve is fixed inside the through hole of the moving part, or the first end of the guide sleeve abuts against the inner end of the through hole of the moving part.

[0030] Preferably, in the above-mentioned wheel central control system, there are two guide shafts, which are arranged on both sides of the moving part, and the guide shaft sleeves are arranged in a one-to-one correspondence with the guide shafts.

[0031] The brake caster state holding mechanism also includes an automatic reset component for automatically resetting the moving part relative to the fixed part.

[0032] Preferably, in the above-mentioned wheel central control system, the automatic reset component includes:

[0033] A reset spring is provided along the guide shaft and is installed between the moving part and the fixed base.

[0034] Preferably, the above-mentioned wheel central control system also includes a rear brake caster, adjacent rear brake casters are connected by a rear brake spindle, and the brake spindle is driven to rotate by a transmission mechanism.

[0035] Preferably, in the above-mentioned wheel central control system, the transmission mechanism is a four-bar linkage, a belt drive mechanism, or a gear drive mechanism.

[0036] Preferably, the aforementioned wheel central control system further includes:

[0037] A straight-running caster, wherein the straight-running spindle of the straight-running caster is rotatably mounted on the support plate, and the straight-running spindle is engaged with the straight-running hole of the straight-running caster. During the rotation of the straight-running spindle along the first direction, the straight-running caster can switch from a free state to a straight-running state. During the rotation of the straight-running spindle along the second direction, the straight-running caster switches from a straight-running state to a free state.

[0038] A straight-line pedal, wherein the straight-line pedal drives the straight-line main shaft to rotate along the first direction via a straight-line shift fork;

[0039] A straight caster state holding mechanism is used to limit the position of the straight fork, and the straight caster state holding mechanism has the same structure as the brake caster state holding mechanism, and the connection structure between the straight caster state holding mechanism and the straight fork is the same as the connection structure between the brake caster state holding mechanism and the brake fork.

[0040] A pushcart-type mobile medical device includes a wheel central control system, wherein the wheel central control system is any one of the wheel central control systems described above.

[0041] Preferably, in the above-mentioned push-type portable medical device, the push-type portable medical device is a push-type ultrasound diagnostic device.

[0042] The present invention provides a wheel central control system. When the brake pedal is first pressed, the brake pedal rotates in a first direction, and at the same time, the brake fork drives the moving part to move closer to the fixed part, so that the brake lever moves from the initial position to the first proximal position; at the same time, the rotation of the brake fork drives the brake spindle to rotate in the first direction until the brake caster is in the braking state.

[0043] When the brake pedal is released, the moving part automatically resets away from the fixed part due to the automatic reset function of the moving part. During this process, the brake lever moves from the first proximal position to the limit position and is limited there. Meanwhile, the brake fork drives the brake pedal to reset to the preset angle and is limited there. At the same time, when the brake fork rotates back to the preset position, the brake caster is in the braking state.

[0044] When the brake pedal is pressed again, the brake pedal rotates in the first direction and drives the moving part to move towards the fixed part through the brake shift fork. During this process, the brake lever moves from the limit end position to the second proximal end position. After the brake pedal is released, the moving part resets in the direction away from the fixed part, the brake lever moves from the second proximal end position to the initial position, and at the same time, the brake shift fork rotates in the second direction and drives the brake spindle 8 to rotate in the second direction until the brake caster is in a free state.

[0045] As can be seen from the above process, the operator only needs to press the same pedal to switch between braking and free states, making the operation simple and convenient; and the pedaling direction is the same, so there is no need to hook the foot, and the state is switched by the number of times the pedal is pressed, thus making the control method simple and convenient.

[0046] Furthermore, the present invention also provides a pushcart-type mobile medical device with the aforementioned central wheel control system. Therefore, the pushcart-type mobile medical device with the aforementioned central wheel control system also has all the aforementioned technical effects, which will not be elaborated here. Attached Figure Description

[0047] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0048] Figure 1 This is a schematic diagram of the wheel central control system disclosed in an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of the brake caster state holding mechanism of the wheel central control system disclosed in an embodiment of the present invention.

[0050] Figure 3 This is a partial disassembly diagram of the brake caster state holding mechanism of the wheel central control system disclosed in an embodiment of the present invention;

[0051] Figure 4 This is a top view of the moving part of the brake caster state holding mechanism of the wheel central control system disclosed in an embodiment of the present invention;

[0052] Figure 5 This is a side view of the assembly of the brake fork and lever pin in the wheel central control system disclosed in an embodiment of the present invention.

[0053] Figure 6 This is a side view of the assembly of the brake fork and brake spindle of the wheel central control system disclosed in an embodiment of the present invention.

[0054] Wherein: 1 is support plate, 2 is support adapter block, 3 is support base, 4 is straight pedal, 5 is straight spindle, 61 is brake shift fork, 62 is straight shift fork, 7 is brake pedal, 8 is brake spindle, 9 is rear brake spindle, 10 is short link, 11 is long link, 12 is brake caster status holding mechanism, 13 is straight caster, 14 is brake caster, 15 is rear brake caster, 16 is straight caster status holding mechanism, and 81 is limit pin;

[0055] 121 is a fixed component, 122 is a moving component, 123 is a guide shaft, 124 is a guide shaft sleeve, 125 is a return spring, 126 is a spring seat, 127 is a guide shaft support, 128 is a brake lever, 129 is a lever pin, and 1210 is a lever pin. Detailed Implementation

[0056] This invention specifically discloses a wheel-centric central control system to simplify and facilitate control. Furthermore, this invention also discloses a pushcart-type mobile medical device incorporating the aforementioned wheel-centric central control system.

[0057] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0058] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

[0059] like Figures 1-3 As shown, this application discloses a wheel central control system, including: a support plate 1, a brake caster 14, a brake spindle 8, a brake pedal 7, and a brake caster state holding mechanism 12. The support plate 1 is fixed to the medical device base via a support adapter block 2, and a support seat 3 and the caster state holding mechanism 12 are fixed to the support plate 1. The brake spindle 8 is rotatably mounted on the support seat 3, specifically, the brake spindle 8 is supported on the support seat 3 via bearings. The brake caster 14 in this application has a brake hole, specifically a hexagonal end, into which the brake spindle 8 is inserted. When the brake spindle 8 rotates in a first direction within the hexagonal end, the brake caster 14 switches from a free state to a braking state; when the brake spindle 8 rotates in a second direction, the brake caster 14 switches from a braking state to a free state. Specifically, the first and second directions are opposite. In a specific embodiment, the first direction can be set as the rotation direction during the depressing of the brake pedal 7.

[0060] In this application, the brake pedal 7 drives the brake spindle 8 to rotate in a first direction via the brake fork 61. The specific rotation direction of the brake pedal 7 can be set according to actual needs. The brake fork 61 and the brake spindle 8 can be connected to form a synchronously rotating structure, and the brake fork 61 and the brake pedal 7 can be fixedly connected. During operation, when the operator depresses the brake pedal 7, it drives the brake fork 61 to rotate around the brake spindle 8, thereby driving the brake spindle 8 to rotate synchronously.

[0061] The aforementioned brake caster state holding mechanism 12 is used to limit the position of the brake fork 61 and fix the brake fork 61 in the required position, thereby limiting the brake spindle 8 to the hexagonal head end, so that the brake caster 14 stays in the brake state or free state.

[0062] Specifically, the aforementioned brake caster state holding mechanism 12 includes a movable member 122 and a fixed member 121. The movable member 122 and the fixed member 121 are capable of relative movement and can automatically reset. The movement of the movable member 122 relative to the fixed member 121 is specifically transmitted to the brake fork 61 by the rotation of the brake pedal 7, and then the brake fork 61 pushes the movable member 122 to perform linear motion during rotation. That is, the brake fork 61 in this application, driven by the brake pedal 7, transmits rotation to the brake spindle 8 on one hand, and converts the rotation into linear motion of the movable member 122 on the other. Regarding the connection between the brake fork 61 and the movable member 122, the movable member 122 abuts against the end of the brake fork 61, and the movable member 122 is located within the rotation plane of the brake fork 61.

[0063] In order to fix the movable part 122 relatively to limit the position of the brake fork 61 and thus maintain the state of the brake fork 61, the movable part 122 and the fixed part 121 are connected by a linkage locking structure in this application. When the movable part 122 moves relative to the fixed part 121 to the first position, the linkage locking structure locks the movable part 122 and the brake caster remains in the braked state; when the movable part 122 moves relative to the fixed part 121 to the second position, the linkage locking structure locks the movable part 122 and the brake caster remains in the free state.

[0064] By setting a linkage locking structure, the position of the moving part 122 can be locked, thereby locking the position of the brake fork 61 and the current state of the wheel position.

[0065] In a specific embodiment, the brake pedal 7 drives the brake fork 61 to rotate, which in turn drives the movement of the movable member 122, and the movement of the movable member 122 can automatically reset. Specifically, the linkage locking member includes a brake lever 128 and a guide groove. In practice, one of the movable member 122 and the fixed member 121 is hinged to the brake lever 128, and the other has a guide groove. The brake lever 128 has a protrusion that cooperates with the guide groove and slides along the guide groove. That is, the guide groove guides the movement of the brake lever 128 by guiding the protrusion.

[0066] The aforementioned guide groove includes an initial position a, a first proximal position b, a limiting position c, and a second proximal position d that are connected in sequence to form the guide groove. The initial position a and the second proximal position d are connected.

[0067] Specifically: When the brake pedal 7 is pressed for the first time, the brake lever 128 moves from the initial position a to the first proximal position b, and the brake spindle 8 rotates until the brake caster 14 is in the braking state;

[0068] After the brake pedal 7 is released, the brake lever 128 moves from the first proximal position b to the limiting position c. The brake fork 61 drives the brake pedal 7 to reset to the preset angle and limit it there. When the brake fork 61 rotates to the preset position, the brake caster 14 is in the braking state.

[0069] When the brake pedal 7 is pressed again, the brake lever 128 moves from the limit position c to the second proximal position d. After the brake pedal 7 is released, the brake lever 128 moves from the second proximal position d to the initial position a.

[0070] Furthermore, the rotation of the brake fork 61 drives the brake spindle 8 to rotate in the second direction until the brake caster 14 is in a free state.

[0071] In the specific working process, the brake pedal 7 drives the brake fork 61 to rotate, which in turn moves the moving part 122 towards the fixed part 121. Figure 3 Taking the movement of the guide shaft support 127 towards the fixed seat 126 (denoted as the contraction direction) as an example, the moving part 122 moves away from the fixed part 121 ( Figure 3 The direction from the fixed seat 126 to the guide shaft support 127 (denoted as the elongation direction) is opposite to the direction toward the fixed member 121, and this direction will be referred to in the following text:

[0072] When the brake pedal 7 is first pressed, the brake pedal 7 rotates in the first direction, and at the same time, the moving part 122 is driven to move in the retraction direction through the brake shift fork 61, so that the protrusion of the brake lever 128 moves from the initial position a to the first proximal position b; at the same time, the brake pedal 7 drives the brake spindle 8 to rotate in the first direction through the rotation of the brake shift fork 61 until the brake caster 14 is in the braking state.

[0073] When the brake pedal 7 is released, the automatic reset function of the moving part 122 causes it to reset in the extension direction. During this process, the protrusion of the brake lever 128 moves from the first proximal position b to the limiting position c and is limited there. Meanwhile, the brake fork 61 drives the brake pedal 7 to reset to a preset angle and is limited there. At the same time, when the brake fork 61 rotates back to the preset position, the moving part 122 moves to the first position under the action of the brake fork 61. Under the limiting action of the brake lever 128 and the limiting position c of the guide groove, the moving part 122 is locked in the first position, and the brake caster 4 is in a braking state. It should be noted that along the direction of movement of the moving part 122, the distance L1 from the initial position to the first proximal position is greater than the distance L2 from the first proximal position to the limiting position. The preset angle for the reset of the brake fork 61 is the angle of rotation of the brake fork 61 corresponding to the distance L2 that the moving part 122 has moved, that is, this angle is related to the moving distance of the moving part 122.

[0074] When the brake pedal 7 is pressed again, the brake pedal 7 rotates in the first direction and drives the moving part 122 to move in the retraction direction through the brake fork 61. During this process, the brake lever 128 moves from the limiting end position c to the second proximal end position d. After the brake pedal 7 is released, the moving part 122 returns to its original position away from the fixed part 121, and the brake lever 128 moves from the second proximal end position d to the initial position a. At this time, under the action of the brake fork 61, the moving part 122 moves to the second position, and under the limiting action of the brake lever 128 and the initial position a of the guide groove, the moving part 122 is locked in the second position. At the same time, the rotation of the brake fork 61 in the second direction drives the brake spindle 8 to rotate in the second direction until the brake caster 144 is in a free state.

[0075] As can be seen from the above process, the operator only needs to press the same pedal to switch between braking and free states, making the operation simple and convenient; and the pedaling direction is the same, so there is no need to hook the foot, and the state is switched by the number of times the pedal is pressed, thus making the control method simple and convenient.

[0076] In a specific embodiment, one end of the brake fork 61 is fixedly connected to the brake pedal 7, and the other end abuts against the moving part 122. The brake spindle 8 rotatably passes through the brake fork 61. The brake spindle 8 serves as the rotation center of the brake fork 61, that is, when the brake pedal 7 is pressed down, the brake pedal 7 rotates around the brake spindle 8.

[0077] like Figure 6 As shown, the brake spindle 8 and brake fork 61 can be stopped by a limiting pin 81 during relative rotation. That is, when the brake pedal 7 is depressed, the brake spindle 8 and brake fork 61 rotate relative to each other by a preset angle before connecting and rotating synchronously. Specifically, a pin hole is opened in the mounting hole of the brake fork 61, and a limiting pin 81, preferably a cylindrical pin, is provided on the brake spindle 8, and the limiting pin 81 can rotate a certain angle within the pin hole. When the brake spindle 8 rotates relative to the brake fork 61, the cylindrical pin abuts against the first side wall of the pin hole; when rotating in the opposite direction, the cylindrical pin abuts against the second side wall of the pin hole, wherein the first side wall and the second side wall are opposite each other.

[0078] This setting increases the travel of the brake pedal 7, allowing for a more accurate operating experience and preventing situations where the brake pedal fails to engage even with light pressure.

[0079] Based on the above settings, it is necessary to ensure that the rotation angle of the brake spindle 8 relative to the brake fork 61 is less than the rotation angle when the brake pedal 7 is depressed, so as to ensure that the brake spindle 8 can be driven to rotate in the first direction when the brake pedal 7 is depressed.

[0080] In one specific embodiment, the brake caster state holding mechanism 12 further includes a guide component for guiding the movement of the movable member 122 relative to the fixed member 121 and an automatic reset component for realizing the automatic reset of the movable member 122.

[0081] The guiding assembly includes a guide shaft 123, specifically, the two ends of which are respectively mounted on a guide shaft support 127 and a fixed base 126. The guide shaft support 127 is fixed to the first end of the fixing member 121, and the fixed base 126 is fixed to the second end of the fixing member 121. The moving member 122 moves from the first end of the fixing member 121 to the second end in a contraction direction, and vice versa in an extension direction.

[0082] The guide shaft 123 guides the movement of the moving part 122, preventing the moving part 122 from tilting and jamming during movement.

[0083] The guide assembly also includes a guide sleeve 124. Specifically, the guide sleeve 124 is sleeved on the outside of the guide shaft 123, and the first end of the guide sleeve 124 is fixed in the through hole of the movable member 122; or the first end of the guide sleeve 124 abuts against the inner end of the through hole of the movable member 122, which defines the installation method of the guide sleeve 124. The guide sleeve 124 can reduce friction.

[0084] The aforementioned automatic reset component includes a reset spring 125, which is positioned between a guide sleeve 124 and a fixed base 126 on the movable component 122. The guide sleeve 124 and the guide shaft 123 are arranged in a one-to-one correspondence.

[0085] To improve the guiding effect, two guide shafts 123 are provided in this application and arranged at both ends of the moving part 122. The two guide shafts 123 can further ensure the stability of the moving part and prevent the moving part 122 from tilting relative to the fixed part 121.

[0086] Those skilled in the art will understand that, in practice, the process of pressing the brake pedal 7 can also be set as follows: the brake fork 61 drives the moving part 122 to move away from the fixed part 121. Therefore, the function of the aforementioned return spring 125 is to drive the moving part 122 to return to the position closer to the fixed part 121.

[0087] In a specific embodiment, the movable element 122 can be a slider, while the fixed element 121 is a groove, and the groove is mounted on the support plate 1. A spring seat 126 is mounted at the bottom end of the groove (the end away from the slider), and the slider moves along the groove. Figure 1 See, the bottom of the chute faces the rear brake caster 15.

[0088] In a preferred embodiment, the movable member 122 is provided with a lever pin 1210, and the end of the brake fork 61 has an open fork capable of covering the surface of the lever pin 1210. For example... Figure 5 As shown, the brake shift fork 61 engages with the lever pin 1210, allowing the brake shift fork 61 to drive the moving part 122 to move via the lever pin 1210. Furthermore, the return spring 125 can reset the lever pin 1210, causing the brake shift fork 61 to rotate in the opposite direction. The use of an open fork design ensures the rotation of the brake shift fork 61 around the lever pin 1210, thus guaranteeing both the rotation of the brake shift fork 61 and the linear movement of the moving part 122.

[0089] In one embodiment, based on the above, a guide groove is provided on the movable member 122, and the brake lever 128 is hinged to the fixed member 121. A protrusion that engages with the guide groove and can slide along it is provided at the end of the brake lever 128. Preferably, the protrusion can be a gourd-shaped piece that is engaged within the guide groove, with the gourd-shaped waistline positioned at the opening of the guide groove to prevent the protrusion from falling out, thus ensuring the stability of the device. A lever pin 129 is fixed to the second end of the fixed member 121, and the brake lever 128 is sleeved on the lever pin 129, thereby achieving a hinged connection between the brake lever 128 and the fixed member 121. Specifically, the brake lever 128 is hinged to the fixed seat 126 via the lever pin 129. Those skilled in the art will understand that the positions of the guide groove and the brake lever 128 can be interchanged, but the mating relationship remains the same, and will not be described in detail here.

[0090] like Figure 4As shown, the limiting end c of the guide groove disclosed in this application is located between the first proximal end b and the second proximal end d, and the limiting end c is closer to the initial position a than the first proximal end b and the second proximal end d, so that the limiting end c forms a recessed position. Specifically, it includes: a first channel, a second channel, a third channel and a fourth channel. The system comprises the following channels: a first channel connects the initial position a and the first proximal position b, and the first channel is a bent channel that protrudes away from the second proximal position; a second channel connects the first proximal position b and the limiting position c, and the second channel is a straight channel; to enable the protrusion of the brake lever 128 to move from the first channel to the second channel, a guide surface is provided at the connection between the first channel and the second channel to guide the movement towards the second channel; a third channel connects the limiting position c and the second proximal position d, and the third channel is a straight channel; to enable the protrusion of the brake lever 128 to move from the second channel to the third channel, a guide surface is provided at the connection between the second channel and the third channel to guide the movement towards the third channel; and a fourth channel connects the second proximal position d and the initial position a, and the fourth channel is a bent channel; to enable the protrusion of the brake lever 128 to move from the third channel to the fourth channel, a guide surface is provided at the connection between the third channel and the fourth channel to guide the movement towards the fourth channel.

[0091] In this application, by setting the shape and tilt angle of the guide groove, the movement of the protrusion of the brake lever 128 is guided in a fixed direction, thereby achieving the purpose of this application. Those skilled in the art will understand that preset guidance can be achieved by changing the bending position of the channel or setting a guide surface, and any shape of the guide groove that enables the preset movement direction is within the scope of protection, and will not be described in detail here.

[0092] Based on the above technical solution, the wheel central control system also includes a rear brake caster 15, and adjacent rear brake casters 15 are connected via a rear brake spindle 9. To achieve simultaneous control of the state switching of brake casters 14 and rear brake casters 15 through a single brake caster state holding mechanism 12, the brake spindle 8 and rear brake spindle 9 are connected via a transmission mechanism. When the brake spindle 8 rotates, the transmission mechanism drives the rear brake spindle 9 to rotate synchronously and in the same direction.

[0093] This method simplifies the structure and ensures the stability of the brake. The number of rear brake casters 9 can be set according to different needs, preferably two.

[0094] The transmission mechanism disclosed in this application may be a four-bar linkage, a belt drive mechanism, or a gear drive mechanism. For example... Figure 1As shown, the four-bar linkage used in this design transmits torque. Specifically, a short connecting rod 10 is fixed to both the brake spindle 8 and the rear brake spindle 9, and the two short connecting rods 10 are hinged together by a long connecting rod 11, thus forming a revolute joint. The short connecting rods 10, the long connecting rod 11, and the base constitute a parallelogram transmission mechanism. When the brake spindle 8 rotates, it drives the long connecting rod 11 to rotate, which in turn drives the rear brake spindle 9 to rotate synchronously. The left and right ends of the rear brake spindle 9 are connected to the rear brake casters 15, thereby controlling the rear brake casters 15.

[0095] Both belt drive and gear drive mechanisms are commonly used existing transmission structures, and their connection methods and principles are well-known technologies. Therefore, they will not be described in detail here. The core of this solution lies in the utilization of these transmission mechanisms.

[0096] Based on the above technical solution, in order to further realize the switching between the straight-line state and the free state of the wheel, this application also adds a straight-line caster 13, a straight-line pedal 4, and a straight-line caster state holding mechanism 16.

[0097] The straight-running caster 13 has a rotatable main shaft 5 mounted on a support plate 1. The main shaft 5 engages with a straight-running hole in the caster 13, which has a hexagonal end. The main shaft 5 is inserted into this hexagonal end. During rotation of the main shaft 5 in the first direction, the caster 13 can switch from a free state to a straight-running state. During rotation of the main shaft 5 in the second direction, the caster 13 switches from a straight-running state to a free state. The straight-running pedal 4 drives the main shaft 5 to rotate in the first direction via a straight-running fork 62. A straight-running caster state-holding mechanism 16 is used to limit the position of the straight-running fork 61. It should be noted that the straight-running caster state-holding mechanism 16 has the same structure as the brake caster state-holding mechanism 12, and the connection structure between the straight-running caster state-holding mechanism 16 and the straight-running fork 62 is the same as the connection structure between the brake caster state-holding mechanism 12 and the brake fork 61.

[0098] pass Figure 1 As can be seen, the part that enables straight movement and the part that enables braking have the same structure, only the function of the casters is different. Therefore, the state switching process of the straight-moving caster 13 can be completely referred to the state switching process of the braking caster 14 described above, and will not be repeated here.

[0099] This application achieves the switching between straight-ahead and omnidirectional states, as well as the switching between braking and omnidirectional states, through the aforementioned structure. Furthermore, braking can be achieved by pressing the brake pedal 7 regardless of whether the vehicle is in straight-ahead or omnidirectional state.

[0100] To remind the operator and prevent incorrect pedal use, the straight-ahead pedal 4 disclosed in this application has a straight-ahead symbol affixed to it, and the brake pedal 7 has a brake symbol affixed to it. The content of the straight-ahead symbol and the brake symbol can be text or images, etc., and any method that allows for differentiation is within the scope of protection.

[0101] In addition, this application also discloses a pushcart-type mobile medical device, including a wheel central control system, wherein the wheel central control system is the wheel central control system disclosed in the above embodiments. Therefore, the pushcart-type mobile medical device with the wheel central control system also has all the above-mentioned technical effects, which will not be described in detail here.

[0102] In practice, the push-type mobile medical device can be a push-type ultrasound diagnostic device. Those skilled in the art will understand that the push-type mobile medical device can also be other medical devices that need to be moved. That is, the application of the wheel central control system in medical devices is disclosed here. Those skilled in the art will understand that the above-disclosed wheel central control system can also be applied to other devices, and all are within the scope of protection.

[0103] As indicated in this application and claims, unless the context clearly indicates otherwise, the words "a," "an," "a," and / or "the" are not specifically singular and may include the plural. Generally, the terms "comprising" and "including" only indicate the inclusion of expressly identified steps and elements, which do not constitute an exclusive list, and the method or apparatus may also include other steps or elements. An element defined by the phrase "comprising an..." does not exclude the presence of other identical elements in the process, method, product, or apparatus that includes the element.

[0104] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0105] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those 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 invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A wheel central control system, characterized by, The utility model relates to a kind of brake foot wheel state holding mechanism (12) for limiting the position of brake fork (61), and the brake foot wheel state holding mechanism (12) includes: movable piece (122) and fixed piece (121) capable of relative motion and automatic reset, the movable piece (122) moves synchronously with brake fork (61) in the rotation plane of brake fork (61), and the movable piece (122) and the fixed piece (121) are connected by linkage locking structure, the movable piece (122) is moved to first position relative to the fixed piece (121), and the linkage locking structure locks the movable piece (122), and the brake foot wheel keeps in brake state;The movable piece (122) is moved to second position relative to the fixed piece (121), and the linkage locking structure locks the movable piece (122), and the brake foot wheel keeps in free state. The linkage locking structure includes: brake pull rod (128) and the guide special-shaped groove set on the other of movable piece (122) and fixed piece (121) are hinged with one of movable piece (122) and fixed piece (121), and the brake pull rod (128) has protrusion that is cooperated with the guide special-shaped groove and slides along the guide special-shaped groove;The guide special-shaped groove includes initial position (a), first proximal position (b), limit end position (c) and second proximal position (d) that are sequentially communicated to form guide groove, and the initial position (a) and the second proximal position (d) are communicated;The limit end position (c) is located between the first proximal position (b) and the second proximal position (d), and the limit end position (c) is closer to the initial position (a) than the first proximal position (b) and the second proximal position (d), so that the limit end position (c) forms recessed position;In the direction of movable piece (122) movement, the distance L1 from the initial position (a) to the first proximal position (b) is greater than the distance L2 from the first proximal position (b) to the limit end position (c); Brake pedal (7) drives brake main shaft (8) to rotate along the first direction by brake yoke (61); Brake pedal (7) drives brake main shaft (8) to rotate along the first direction by brake yoke (61); ​ The first channel connecting the initial position (a) and the first proximal position (b) is a bent channel protruding away from the second proximal position (d), and the channel connecting the first proximal position (b) and the limit end position (c) is a second channel, the connection between the first channel and the second channel has a guide surface guiding to the second channel; the channel connecting the limit end position (c) and the second proximal position (d) is a third channel, and the connection between the second channel and the third channel has a guide surface guiding to the third channel; the fourth channel connecting the second proximal position (d) and the initial position (a) is a bent channel, and the connection between the third channel and the fourth channel has a guide surface guiding to the fourth channel.

2. The central control system of the vehicle wheel according to claim 1, wherein, When the brake pedal (7) is stepped on for the first time, the brake pedal (7) drives the moving part (122) to move through the brake yoke (61), so that the protrusion of the brake pull rod (128) moves from the initial position (a) to the first proximal position (b), and at the same time, the brake pedal (7) drives the brake spindle (8) to rotate in the first direction through the brake yoke (61) to the brake caster (14) in the braking state; after the brake pedal (7) is released, the moving part (122) resets and moves, so that the protrusion of the brake pull rod (128) moves from the first proximal position (b) to the limit end position (c) and is locked at the limit end position (c), thereby the moving part (122) is locked at the first position, and the brake caster (14) remains in the braking state; When the brake pedal (7) is stepped on again, the brake pull rod (128) is driven by the brake yoke (61) to move from the limit end position (c) to the second proximal position (d); after the brake pedal (7) is released, the moving part (122) resets and moves, so that the brake pull rod (128) moves from the second proximal position (d) to the initial position (a), and at the same time, the moving part (122) moves to the second position, the brake yoke (61) is rotated by the action of the moving part (122) and drives the brake spindle (8) to rotate in the second direction to the brake caster (14) in the free state.

3. The wheel central control system according to claim 2, characterized in that, The guide special-shaped groove is arranged on the moving part (122), and the brake pull rod (128) is hinged to the fixed part (121).

4. The wheel central control system according to claim 1, characterized by One end of the brake yoke (61) is fixedly connected with the brake pedal (7), the other end abuts against the moving part (122), the brake spindle (8) penetrates through the brake yoke (61), and the brake yoke (61) can drive the brake spindle (8) to rotate through the limiting cooperation with the brake spindle (8).

5. The wheel central control system according to claim 4, characterized in that, The brake spindle (8) and the brake yoke (61) are limited by the limiting pin (81).

6. The wheel central control system according to claim 1, characterized by The moving part (122) is provided with a shifting lever pin (1210), and the end of the brake shifting fork (61) has an open fork capable of being wrapped around the surface of the shifting lever pin (1210).

7. The wheel central control system according to claim 1, characterized by The fixed part (121) is provided with a guide straight slot, and the moving part moves along the guide straight slot.

8. The wheel central control system according to claim 2, characterized by The brake caster state maintaining mechanism (12) further comprises a guide assembly for guiding the movement of the moving part (122) relative to the fixed part (121).

9. The wheel central control system according to claim 8, characterized in that, The guide assembly comprises: a guide shaft (123), wherein the moving part (122) is slidably installed on the guide shaft; a fixed seat (126) and a guide shaft support (127) for erecting the guide shaft (123), wherein the moving part (122) moves between the fixed seat (126) and the guide shaft support (127).

10. The wheel central control system according to claim 9, characterized in that, The guide shaft support (127) is fixed at the first end of the fixed part (121), and the fixed seat (126) is fixed at the second end of the fixed part (121). The brake pull rod (128) is hinged on the fixed seat (126).

11. The wheel central control system according to claim 9, characterized by The guide assembly further comprises: a guide shaft sleeve (124), wherein the guide shaft sleeve (124) is sleeved outside the guide shaft (123); and the guide shaft sleeve (124) is fixed in the perforation of the moving part (122), or the first end of the guide shaft sleeve (124) abuts against the inner end of the perforation of the moving part (122).

12. The wheel central control system according to claim 11, characterized in that, The guide shaft (123) is two, and is arranged on both sides of the moving part (122); the guide shaft sleeve (124) is arranged in one-to-one correspondence with the guide shaft (123).

13. The wheel central control system of claim 9, wherein, The brake caster state maintaining mechanism (12) further comprises an automatic reset part for automatically resetting the moving part (122) relative to the fixed part (121).

14. The wheel central control system according to claim 13, characterized by The automatic reset part comprises: a reset spring (125), wherein the reset spring is arranged along the guide shaft (123), and the reset spring (125) is installed between the moving part (122) and the fixed seat (126).

15. The wheel central control system of claim 1, wherein, Further comprising rear brake casters (15), wherein adjacent rear brake casters (15) are connected through a rear brake main shaft (9), and the brake main shaft (8) drives the rear brake main shaft (9) to rotate through a transmission mechanism.

16. The wheel central control system according to claim 15, characterized in that The transmission mechanism is a four-bar linkage mechanism, a belt transmission mechanism or a gear transmission mechanism.

17. The wheel central control system according to any one of claims 1 to 16, characterized in that Further comprising: straight running casters (13), wherein the straight running main shaft (5) of the straight running caster (13) is rotatably erected on the support plate (1), and the straight running main shaft (5) cooperates with the straight running hole of the straight running caster (13); the straight running caster (13) can be switched from a free state to a straight running state during the rotation of the straight running main shaft (5) along the first direction, and the straight running caster (13) can be switched from the straight running state to the free state during the rotation of the straight running main shaft (5) along the second direction; a straight running pedal (4), wherein the straight running pedal (4) drives the straight running main shaft (5) to rotate along the first direction through a straight running shifting fork (62). A straight-going caster state holding mechanism (16) for limiting the position of the straight-going fork (62), and the straight-going caster state holding mechanism (16) is the same structure as the brake caster state holding mechanism (12), and the connection structure of the straight-going caster state holding mechanism (16) and the straight-going fork (62) is the same as the connection structure of the brake caster state holding mechanism (12) and the brake fork (61).

18. A cart-based mobile medical device comprising a wheel central control system, characterized in that, The wheel central control system is the wheel central control system according to any one of claims 1-17.

19. The cart-based mobile medical apparatus of claim 18, wherein, The trolley type movable medical equipment is a trolley type ultrasonic diagnostic equipment.

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