Anti-falling device for lifting support arm of medical mobile X-ray camera

Abstract

The utility model relates to the field of medical instruments, in particular to an anti-falling device for a lifting support arm of a medical mobile X-ray photographic apparatus, which comprises a vertical column with an inner cavity, a limiting steel bar fixed on the inner wall of the vertical column, a balancing weight fixed in the vertical column, a steel wire rope connected with the balancing weight, and the lifting support arm embedded on the vertical column and sliding, the left end of the lifting support arm is connected with the end of the steel wire rope, the anti-falling device comprises a signal sensing module and an electromagnetic valve, a plurality of grooves extending in the length direction of the limiting steel bar are formed in the surface of the limiting steel bar, the signal sensing module is installed at the end of a bumper at the upper end of the balancing weight, and the electromagnetic valve is installed at the left end of the lifting support arm. And the driving end of the electromagnetic valve is opposite to the groove surface of the limiting steel bar. According to the design, the electromagnetic valve and the sensor are matched to quickly intercept the falling lifting support arm caused by breakage of the steel wire rope, so that the risk that equipment slides down and is crashed can be avoided, the service life of the equipment is prolonged, and the maintenance cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a lifting arm anti-falling device for a medical mobile X-ray camera. Background Art

[0002] Medical digital X-ray radiographic diagnostic equipment is mainly used for X-ray examination of multiple parts of the human body, such as the head, chest, abdomen, joints, limbs, etc. When in use, it needs to be used together with the gravity frame mechanism. The X-ray is installed on the counterweight of the gravity frame. The counterweight drives the X-ray to slide in the column cavity, so that the X-ray can scan up and down. However, the counterweight in the current product has no anti-fall protection mechanism and is directly suspended by wire ropes and chains. The safety factor is low. When a rope breaks, the equipment can still slide in the inner cavity of the column, and the X-ray continues to scan. The fault cannot be identified in time, resulting in inaccurate data exclusion. In addition, there is no preventive device. The wire rope breakage can easily cause the X-ray arm to fall on the patient and cause a safety accident.

[0003] For example, the utility model with the authorization announcement CN 207393845 U relates to an anti-fall protection mechanism, and discloses an X-ray counterweight anti-fall protection mechanism, which comprises a column in the inner cavity, a counterweight slidably arranged with the column, a clamping plate assembly arranged at the top of the counterweight and slidingly contacting with the inner wall of the column, a hanging plate fixed on the clamping plate assembly, a safety rod assembly whose two ends are balanced by external forces and hinged with the hanging plate, and the hinged part of the safety rod assembly and the hanging plate is located on the central axis of the counterweight; the safety rod assembly is used to be driven by the counterweight to slide in the inner cavity of the column when the two ends are balanced by external forces; the safety rod assembly is also used to rotate around the hinged part of the hanging plate when the two ends are unbalanced by external forces, and the two ends of the diagonal of the safety rod assembly are stuck with the inner wall of the column, pulling the counterweight to be fixed in the inner cavity. Compared with the prior art, when the rope breaks, the counterweight is fixed in the column and cannot continue to slide, and personnel can identify the mechanism failure in time.

[0004] The patent announced above prevents falling by adding another layer of protection on the counterweight, and using an additional safety rod to hold the counterweight. In this way, even if the wire rope breaks, the counterweight can be held and will not cause the entire X-ray arm to slide down and fall. However, this technology is only to prevent the counterweight from falling, and the breakage of the wire rope can easily cause the entire camera lifting arm to fall and hit the patient below. In order to solve the problem of the lifting arm falling easily, we have designed another safer way. Utility Model Content

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a lifting arm anti-falling device for a medical mobile X-ray camera, which can prevent the lifting bracket and X-ray tube assembly suspended above the patient being photographed from falling after the wire rope breaks, thereby preventing the patient being photographed from being hit.

[0006] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0007] A lifting arm anti-falling device for a medical mobile X-ray camera, the medical mobile X-ray camera comprises a column containing an inner cavity, a limit steel bar fixed to the inner wall of the column, a counterweight fixed in the column and a steel wire rope connected to the counterweight, and a lifting arm embedded in the column and sliding up and down along the column, the left end of the lifting arm is connected to the end of the steel wire rope, and the right end of the lifting arm is installed with an X-ray tube assembly;

[0008] The lifting arm anti-falling device includes a signal sensing module and a solenoid valve. A plurality of grooves extending along the length direction of the limit steel bar are arranged on the surface of the limit steel bar, and the plurality of grooves are arranged at equal intervals.

[0009] A safety rod is provided inside the column, the center of gravity of the safety rod is hinged on the upper end of the counterweight, one end of the safety rod is connected to a steel wire rope with a lifting arm, and the other end of the safety rod is held in the inner cavity of the column by a tension spring, and the signal sensing module is installed on the tension spring.

[0010] The solenoid valve is installed at the left end of the lifting arm, and the driving end of the solenoid valve is opposite to the groove surface of the limiting steel bar. The solenoid valve is a pneumatic pilot solenoid valve. The pilot head of the pneumatic pilot solenoid valve protrudes from the valve body, and the front end of the pilot head fits the shape of the groove.

[0011] Furthermore, the groove is in the shape of a rectangle or a trapezoid that is wide outside and narrow inside, and the front end of the pilot head is in the shape of a rectangle or a trapezoid that is wide outside and narrow inside.

[0012] Furthermore, a reinforcing slider with a triangular side is provided at the left end of the lifting arm. The reinforcing slider is embedded in the opening groove of the column and slides up and down. The end of the wire rope pulls the upper end of the reinforcing slider, and its solenoid valve is installed on the inner wall of the reinforcing slider.

[0013] Furthermore, the signal sensing module uses a pressure sensor, which is connected to the electromagnetic valve. The pressure sensor is sensitive and can quickly start the electromagnetic valve to pop out the pilot head and insert it into the groove within about 0.5 seconds, quickly clamping the falling lifting arm.

[0014] Furthermore, the interval between two adjacent grooves is 1 cm.

[0015] Furthermore, a travel switch fixed to the inner wall of the column is provided at a distance of 1m to 1.2m from the highest point of the lifting arm, and a protruding block for hitting the travel switch is provided at the lower end of the reinforcing slider. The travel switch forms a secondary protection on the basis of the solenoid valve. Generally, the lifting arm is separated from the patient and can move 2 meters. After the patient lies down, the height distance becomes narrower and is designed to be more than 1 meter, which is the most extreme position to prevent falling and hitting people.

[0016] The beneficial effects of the above design compared with the prior art are: this design uses the cooperation of solenoid valves and sensors to quickly intercept the lifting arm that falls due to the breakage of the wire rope, which can avoid the risk of the equipment sliding down and being damaged, extend the service life of the equipment, and reduce maintenance costs. It can also avoid the risk of the arm falling and injuring the patient. It can ensure that during the operation of the lifting arm, even if a fault or accident occurs, it can prevent the arm from falling suddenly, thereby protecting the safety of medical staff and patients. The lifting arm anti-fall device plays an important role in ensuring the safety of medical operations, protecting equipment, improving work efficiency, and complying with regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the side structure of a medical mobile X-ray camera;

[0018] Figure 2 This is a schematic diagram of the main structure of the lifting arm anti-falling device of the utility model;

[0019] Figure 3 It is a schematic diagram of the side structure of the safety rod in the column of the utility model pulling the counterweight block. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments.

[0021] like Figure 1 , Figure 2 , Figure 3 The lifting arm anti-falling device of the medical mobile X-ray camera shown in the figure comprises a column 1 containing an inner cavity, a limiting steel bar 2 fixed to the inner wall of the column 1, a counterweight block 3 fixed in the column 1 and a steel wire rope 4 connected to the counterweight block 3, and a lifting arm 5 embedded in the column 1 and sliding up and down along the column 1, the left end of the lifting arm 5 is connected to the end of the steel wire rope 4, and the right end of the lifting arm 5 is installed with an X-ray tube assembly 6.

[0022] The lifting arm anti-falling device includes a signal sensing module 7 and a solenoid valve 8. A plurality of grooves 20 extending along the length direction of the limiting steel bar 2 are provided on the surface of the limiting steel bar 2. The plurality of grooves 20 are arranged at equal intervals, and the interval between two adjacent grooves 20 is 1 cm.

[0023] A safety rod 10 is provided inside the column 1, and the center of gravity of the safety rod 10 is hinged at the upper end of the counterweight 3. One end of the safety rod 10 is connected to a steel wire rope 4 with a lifting arm, and the other end of the safety rod 10 is held in the inner cavity of the column by a tension spring 11. The signal sensing module 7 is installed at the lower end of the tension spring 11. The safety rod structure can be as disclosed in the patent CN207393845U. Figure 1 As shown, the safety rod 10 is equivalent to a lever structure. It maintains balance as long as the wire rope 4 does not break. Once the wire rope breaks, the end of the safety rod will be tilted up without tension, thereby compressing the end with the tension spring 11. The deformation of the tension spring 11 is sensed by the pressure sensor, thereby triggering the solenoid valve to start.

[0024] The solenoid valve 8 is installed at the left end of the lifting arm 5, and the driving end of the solenoid valve 8 is directly opposite to the groove surface of the limit steel bar. The solenoid valve 8 is a pneumatic pilot solenoid valve. The pilot head 80 of the pneumatic pilot solenoid valve is beyond the valve body, and the front end of the pilot head 80 fits the shape of the groove 20. The groove 20 is rectangular or a trapezoidal body with a wide outside and a narrow inside. The front end of the pilot head 80 is rectangular or a trapezoidal body with a wide outside and a narrow inside. In this way, the pilot head 80 of the solenoid valve 8 is inserted into the groove 20 and quickly fits and clamps, thereby preventing the lifting arm 5 from descending. The pilot head 80 of the solenoid valve 8 is a non-standard part and can be customized in length.

[0025] In addition, the left end of the lifting arm 5 is provided with a reinforcing slider 50 with a triangular side surface, which is embedded in the opening groove of the column 1 and slides up and down, and the end of the steel wire 4 pulls the reinforcing slider 50, and the solenoid valve 8 is installed on the inner wall of the reinforcing slider 50. The medical mobile X-ray camera is in a 7-shaped shape, and the reinforcing slider 50 enhances the assembly ratio of the two and is also convenient for installing parts such as the solenoid valve.

[0026] The signal sensing module 7 uses a pressure sensor, which is connected to the electromagnetic valve 8. The electromagnetic valve 8 and the sensor are both connected to the power supply of the medical mobile X-ray camera. The electromagnetic valve and the sensor are ordinary circuits and are not shown in the attached drawings. The pressure sensor is sensitive and has a short response time of 0.5ms (can be customized to 0.1ms). Once the tension spring is deformed due to the break of the wire rope (the safety lever loses balance at this time), the electromagnetic valve 8 is started. After the electromagnetic valve 8 is connected, the pilot head 80 pops out and the front end is stuck in the groove 20, thereby preventing the lifting arm 5 from continuing to slide down. The ejection distance of the pilot head is just enough to be stuck in the groove 20 after ejection. The depth of the groove 20 is equal to the extension distance of the pilot head 80. In order to avoid the pilot head 80 not being aligned with the groove 20 when it is ejected, two electromagnetic valves 8 arranged up and down can be designed. Generally, after the pilot head 80 is ejected, it automatically extends to the longest stroke when encountering the concave groove 20, thereby being clamped. After testing, it was found that the guide head would be accurately stuck into the groove when it had slid down a maximum distance of about 10cm.

[0027] A travel switch 9 fixed to the inner wall of the column is provided at a distance of 1m to 1.2m from the highest point of the lifting arm 5. A protruding block for hitting the travel switch is provided at the lower end of the reinforcing slider. The travel switch is also connected to the electromagnetic valve. After the travel switch is triggered, the electromagnetic valve is also energized to pop out the pilot head to clamp in the groove. The travel switch 9 forms a secondary protection on the basis of the electromagnetic valve. Generally, the lifting arm is separated from the patient and can move a distance of 2 meters. After the patient lies down, the height distance becomes narrower and is designed to be more than 1 meter, which is the most extreme position to prevent falling and hitting people.

[0028] The above is a detailed introduction to the lifting arm anti-falling device for medical mobile X-ray camera provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A lifting arm anti-falling device for a medical mobile X-ray camera, wherein the medical mobile X-ray camera comprises a column containing an inner cavity, a limit steel bar fixed to the inner wall of the column, a counterweight fixed in the column and a steel wire rope connected to the counterweight, and a lifting arm embedded in the column and sliding up and down along the column, wherein the left end of the lifting arm is connected to the end of the steel wire rope, and the right end of the lifting arm is equipped with an X-ray tube assembly; Features: The lifting arm anti-falling device includes a signal sensing module and a solenoid valve. A plurality of grooves extending along the length direction of the limit steel bar are arranged on the surface of the limit steel bar, and the plurality of grooves are arranged at equal intervals. A safety rod is provided inside the column, the center of gravity of the safety rod is hinged on the upper end of the counterweight, one end of the safety rod is connected to a steel wire rope with a lifting arm, and the other end of the safety rod is held in the inner cavity of the column by a tension spring, and the signal sensing module is installed on the tension spring. The solenoid valve is installed at the left end of the lifting arm, and the driving end of the solenoid valve is opposite to the groove surface of the limiting steel bar. The solenoid valve is a pneumatic pilot solenoid valve. The pilot head of the pneumatic pilot solenoid valve protrudes from the valve body, and the front end of the pilot head fits the shape of the groove.

2. The anti-falling device for the lifting arm of a mobile medical X-ray camera according to claim 1, characterized in that: The groove is in the shape of a rectangle or a trapezoid that is wide outside and narrow inside, and the front end of the pilot head is in the shape of a rectangle or a trapezoid that is wide outside and narrow inside.

3. The anti-falling device for the lifting arm of a medical mobile X-ray camera according to claim 1, characterized in that: The left end of the lifting arm is also provided with a reinforcing slider with a triangular side surface. The reinforcing slider is embedded in the opening groove of the column and slides up and down. The end of the wire rope pulls the upper end of the reinforcing slider, and its solenoid valve is installed on the inner wall of the reinforcing slider.

4. The anti-falling device for the lifting arm of a medical mobile X-ray camera according to claim 1, characterized in that: The signal sensing module adopts a pressure sensor, and the pressure sensor is connected to the solenoid valve.

5. The anti-falling device for the lifting arm of a medical mobile X-ray camera according to claim 1, characterized in that: The distance between two adjacent grooves is 1 cm.

6. The anti-falling device for the lifting arm of a medical mobile X-ray camera according to claim 3, characterized in that: A travel switch fixed to the inner wall of the column is provided at a distance of 1m to 1.2m from the highest point where the lifting arm moves downward, and a protruding block for striking the travel switch is provided at the lower end of the reinforcing sliding block.

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