CN110934607A

CN110934607A - Obstacle detection mechanism, side rail structure, scanning bed and CT equipment

Info

Publication number: CN110934607A
Application number: CN201911061398.9A
Authority: CN
Inventors: 于军; 胡杨; 张勇
Original assignee: Neusoft Medical Systems Co Ltd
Current assignee: Neusoft Medical Systems Co Ltd
Priority date: 2019-11-01
Filing date: 2019-11-01
Publication date: 2020-03-31
Anticipated expiration: 2039-11-01
Also published as: CN110934607B

Abstract

The invention relates to the technical field of medical equipment, and particularly provides an obstacle detection mechanism, a side rail structure, a scanning bed and CT equipment. The obstacle detection mechanism is suitable for contact detection of a moving device and an obstacle in the moving process, and comprises the following components: a linkage assembly adapted to be disposed on the motion device and having axially opposed first and second ends; the contact part is arranged at the first end of the connecting rod assembly and is suitable for contacting with an obstacle in the movement process of the movement equipment; the connecting rod assembly moves under the action of the barrier force; and the induction assembly comprises an inductor and a trigger piece, the trigger piece is fixedly arranged at the second end of the connecting rod assembly, and the inductor induces a trigger signal in the movement process of the trigger piece. The detection mechanism provided by the invention effectively solves the problem that the movement equipment is damaged by collision and extrusion of obstacles in the movement process.

Description

Obstacle detection mechanism, side rail structure, scanning bed and CT equipment

Technical Field

The invention relates to the technical field of medical equipment, in particular to an obstacle detection mechanism, a side rail structure, a scanning bed and CT equipment.

Background

With the development of science and technology, CT (Computed Tomography) machines are more and more widely applied in medical clinics, and they use precisely collimated rays, sound waves, etc. to scan the cross section of the human body with a detector with extremely high sensitivity, and have the characteristics of fast scanning time, clear imaging, etc., and at the present stage CT machines have become one of the most important medical devices in hospitals. Scanning beds are also increasingly used as an important component of CT machines.

Nowadays, the scanning bed not only serves as a support frame for a tested person, but also is additionally provided with a plurality of auxiliary mechanisms for meeting the requirements of convenience and multifunction. For example: for a part of testees who cannot take care of themselves, firstly, the testees need to be conveyed to the scanning bed by a stretcher and the like, secondly, the scanning bed needs to be adjusted in height, and the bed body is lifted to be level with the stretcher, so that the patients can be conveniently transferred to the scanning bed from the stretcher. However, in actual operation, the stretcher is often squeezed during the lifting process of the scanning bed, so that the side rails or the bed cover of the bed body are damaged by squeezing, and the use of the scanning bed is further affected.

Disclosure of Invention

The invention provides an obstacle detection mechanism capable of detecting obstacle extrusion, and aims to solve the technical problem that existing sports equipment is easily extruded and damaged by obstacles during lifting.

Meanwhile, in order to solve the technical problem that the side rails are easily extruded and damaged by obstacles when the existing sports equipment is lifted and descended, the invention provides a side rail structure capable of preventing the side rails from being extruded and damaged by the obstacles.

Furthermore, in order to solve the technical problem that the existing scanning bed is easily extruded and damaged by obstacles when being lifted, the invention provides the scanning bed and the CT equipment with the scanning bed.

In a first aspect, the present invention provides an obstacle detection mechanism, which is suitable for detecting contact between an exercise device and an obstacle during movement, and includes:

a linkage assembly adapted to be disposed on the motion device and having axially opposed first and second ends;

the contact part is arranged at the first end of the connecting rod assembly and is suitable for contacting with an obstacle in the movement process of the movement equipment; the connecting rod assembly moves under the action of the barrier force; and

the induction component comprises an inductor and a trigger piece, the trigger piece is fixedly arranged at the second end of the connecting rod component, and the inductor induces a trigger signal in the movement process of the trigger piece.

In some embodiments, the obstacle detection mechanism further comprises:

the elastic reset assembly is arranged on the connecting rod assembly and provides elastic force for overcoming the acting force of the barrier for the connecting rod assembly;

in some embodiments, the elastic return assembly comprises:

the connecting rod assembly penetrates through the floating block through the shaft hole and is fixedly connected with the floating block;

the elastic piece is arranged on one side end face of the floating block, one end of the elastic piece is abutted against the floating block, and the other end of the elastic piece is suitable for being abutted against the support; when the connecting rod assembly moves under the action of the acting force of the obstacle, at least one elastic piece provides an elastic force for overcoming the acting force of the obstacle.

In some embodiments, the detection mechanism further includes a fixing sleeve adapted to be fixedly disposed on the moving device, a through hole for the connection rod assembly to pass through is formed in the middle of the fixing sleeve, and the diameter of the through hole is larger than that of the connection rod assembly; the floating block is arranged on the fixed sleeve, and one end of the elastic piece is abutted against one side face of the fixed sleeve.

In some embodiments, the resilient return assembly comprises a resilient member;

the end face of one side of the floating block is provided with a boss, the boss and the elastic piece are respectively arranged on two sides of the axial hole in the radial direction, and one end of the boss and one end of the elastic piece are abutted against one side face of the fixed sleeve.

In some embodiments, the elastic member is a spring plunger, the slider has a mounting hole, and the spring plunger is fixedly disposed in the mounting hole.

In some embodiments, the one side surface of the fixing sleeve is provided with two radial sides of the via hole, and the floating block is arranged between the two lugs and is respectively connected with the two lugs in a rotating manner, and the axis of rotation of the floating block is perpendicular to the connecting line of the mounting hole and the center of the shaft hole.

In some embodiments, the sensor comprises a light sensitive sensor or a micro-touch switch; the trigger piece comprises a baffle piece which is fixedly arranged at the shaft end of the second end of the connecting rod component.

In a second aspect, the present invention provides a side rail structure comprising:

side rails; and

in the detection mechanism according to any one of the embodiments of the first aspect, the first end of the link assembly is fixedly connected to the side rail, the side rail forms the contact portion, and the detection mechanism serves as a main body support structure of the side rail.

In a third aspect, the present invention provides a scanning bed comprising:

a body; and

the detection mechanism according to any one of the first to third embodiments is provided in the main body.

In some embodiments, the body comprises a bed and side rails connected to both sides of the bed by at least one of the detection mechanisms; the inductor is fixedly arranged on the bed body; the side rail is fixedly connected to a shaft end of the first end of the connecting rod assembly to form the contact portion.

In a fourth aspect, the invention provides a CT apparatus comprising a scanning bed according to any of the embodiments of the third aspect.

The technical scheme of the invention has the following beneficial effects:

1) the invention provides an obstacle detection mechanism which is suitable for contact detection of a moving device and an obstacle in the moving process. The induction component comprises an inductor and a trigger piece, the trigger piece is fixedly arranged at the second end of the connecting rod assembly and moves along with the connecting rod assembly, and the inductor induces a trigger signal when the trigger piece moves. When the contact site contacted with the barrier, link assembly was extruded by the barrier and is produced the motion to the sensor senses trigger signal, effectively detects the extruded abnormal state of barrier, avoids being detected equipment and takes place to damage.

2) The obstacle detection mechanism further comprises an elastic reset assembly, the elastic reset assembly is arranged on the connecting rod assembly, so that reset elastic force is provided when the connecting rod assembly moves, and after the obstacle is removed, the elastic reset assembly drives the detection mechanism to automatically reset, and the abnormal state is cancelled.

3) The invention provides an obstacle detection mechanism, wherein an elastic reset assembly comprises a floating block and at least one elastic piece, the floating block is provided with a through shaft hole, a connecting rod assembly penetrates through the floating block through the shaft hole and is fixedly connected with the floating block, the elastic piece is arranged on one side end face of the floating block, one end of the elastic piece abuts against the floating block, the other end of the elastic piece is suitable for abutting against a support, the elastic piece provides a space for the floating block to move along with the connecting rod assembly, when the floating block moves towards a certain direction under the action force of an obstacle, the elastic piece at the position is in a compressed state, and when the obstacle is eliminated, the elastic force drives the floating block to reset.

4) The invention provides an obstacle detection mechanism, wherein a side surface of a fixed sleeve is positioned at two radial sides of a via hole and is respectively provided with a lug, a floating block is arranged between the two lugs and is respectively connected with the two lugs in a rotating way, and the rotating axis of the floating block is vertical to the connecting line of an elastic piece and the center of a shaft hole. Therefore, the fixed sleeve provides a rotation path for the movement of the slider, and whether the moving equipment is blocked and extruded by an obstacle in the lifting process is effectively detected.

5) The side rail structure provided by the invention comprises the side rail and the detection mechanism, wherein the first end of the connecting rod assembly is fixedly connected with the side rail, the side rail forms a contact part, and the detection mechanism is used as a main body supporting structure of the side rail, so that whether the side rail is blocked and extruded by an obstacle or not in the movement process of movement equipment is effectively detected through the detection mechanism, and the side rail is prevented from being damaged.

6) The scanning bed and the CT equipment provided by the invention comprise the detection mechanism, so that all the beneficial effects are achieved, and the scanning bed is prevented from being damaged due to blocking and extrusion of obstacles in the lifting process.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic diagram of a scanning bed according to some embodiments of the present invention.

Fig. 2 is a side rail schematic of a scanning bed according to some embodiments of the invention.

Fig. 3 is a partially enlarged view of the obstacle detecting mechanism in fig. 2.

Fig. 4 is an exploded view of the structure of an obstacle detection mechanism in accordance with some embodiments of the present invention.

Fig. 5 is a cross-sectional view of an obstacle detection mechanism according to some embodiments of the present invention.

Fig. 6 is an enlarged partial view of the resilient return assembly of the embodiment of fig. 5.

Fig. 7 is an enlarged partial cross-sectional view of an obstacle detection mechanism according to further embodiments of the present invention.

Description of reference numerals:

11-side rail struts; 12-a connecting rod; 21-a slider; 211-boss; 212-shaft hole; 221-spring plunger; 221 a-bulb; 221 b-spring; 222-a plunger nut; 3, fixing a sleeve; 31-a via; 32-a lug; 33-a rotating shaft; 41-a sensor; 42-a trigger; 51-fixing block; 52-a fixing bolt; 100-bed body; 101-side rails; 102-a bed cover; 103-bed board; 200-a detection mechanism; a-a first end; b-a second end.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some examples of the present invention, but not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention. In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The obstacle detection mechanism provided by the invention can be used for detecting the contact between the moving equipment and the obstacle in the moving process, such as: and detecting the collision between the scanning bed and the stretcher in the lifting process, and the like. It should be noted that, taking a CT apparatus as an example, in order to prevent the scanning bed from colliding and squeezing with the stretcher during the lifting process, anti-collision ground rails are generally installed on the ground at both sides of the scanning bed, that is, the stretcher is prevented from approaching the scanning bed by the ground rails, so that a large neutral position occurs between the stretcher and the scanning bed. Generally, a subject who cannot take care of his own actions has a large damage to his body, and during the transfer of the stretcher to the scanning bed, the user needs to lift the stretcher to move due to a large gap between the stretcher and the scanning bed, so that the subject is easily damaged secondarily. And there is also a risk of a normal patient tripping over the ground rail while on the scanning bed. Therefore, the existing solution for preventing the scanning bed from being extruded in the lifting process has great potential safety hazard and is difficult to meet the requirement.

Based on the above, the present invention provides an obstacle detection mechanism suitable for detecting that a moving device such as a scanning bed is in contact with an obstacle during movement. The detection mechanism includes a linkage assembly mountable on a moving device, such as a scanning bed, having axially opposed first and second ends. For example, the middle portion of the linkage assembly may be mounted on the scanning bed with the first and second ends extending outwardly and inwardly of the scanning bed, respectively.

The first end of the connecting rod assembly is provided with a contact portion, which may be, for example, a contact surface formed at a shaft end of the connecting rod assembly, or may be, for example, a component mounted at the shaft end of the connecting rod assembly, or may be, for example, a detection body connected to the connecting rod assembly, such as a side rail of a scanning bed, and the invention is not limited thereto. In the movement process of the movement equipment, the contact part is firstly contacted with the obstacle, so that the connecting rod assembly is driven to move under the action of the obstacle.

The sensing assembly is installed at the second end of the connecting rod assembly and comprises a sensor and a trigger piece, the trigger piece is fixedly installed at the second end of the connecting rod assembly, and when the first end of the connecting rod assembly is driven to rotate by the acting force of an obstacle, the trigger piece moves along with the second end, so that the sensor senses a trigger signal in the movement process of the trigger piece. For example, the sensor can adopt a sensor with related functions, and the sensing signal of the sensor is triggered when the trigger piece moves.

According to the obstacle detection mechanism provided by the invention, when the contact part is collided and extruded by the obstacle, the connecting rod assembly moves under the action force of the obstacle, so that the sensor detects the trigger signal, the equipment can be controlled or abnormal reminding can be realized according to the trigger signal, and the equipment damage caused by the continuous movement of the moving equipment can be effectively prevented. On the other hand, the obstacle detection mechanism provided by the invention can be arranged on a motion device such as a scanning bed, so that the obstacle detection in the lifting process of the scanning bed is realized, an anti-collision ground rail is not required to be arranged, a detected person can use the scanning bed conveniently, and the risk of secondary injury is reduced.

Fig. 1 to 6 show an embodiment of an obstacle detection mechanism according to the present invention, and in this embodiment, for convenience of explanation, the motion device is exemplified by a scanning bed of a CT device. However, it should be understood by those skilled in the art that the motion device is not limited to the scanning bed disclosed in the present embodiment, and may be any other suitable device, and the present invention is not limited thereto.

Referring to fig. 1, fig. 1 shows a structure of a scanning bed in the present embodiment. The scanning bed comprises a bed body 100, a lifting structure arranged below the bed body 100, and a conveying structure arranged in the bed body 100. The lifting structure can adjust the height of the scanning bed, and any structure with a lifting function in the related art can be adopted, such as hydraulic lifting, a mechanical arm and the like, and details are not repeated here. The conveying structure realizes the movement of the bed plate 103 in the horizontal direction, so as to drive the human body to enter the scanner for scanning, and the conveying structure can be any structure with a conveying function in the related art, such as a motor conveyor belt and the like, and is not described herein again.

As shown in fig. 1, bed covers 102 are disposed on both sides of the scanning bed, and the bed covers 102 shield the mechanical structures on both sides, so as to prevent a user from touching the transmission structure and being injured, and protect the transmission structure from being damaged; on the other hand, the whole scanning bed is more beautiful. Both sides of the bed body 100 are provided with side rails 101, and the side rails 101 extend out of the bed body 100 in the horizontal direction, so that on one hand, the bed body is prevented from being collided, and on the other hand, the bed cover is supported by 102, so that the stability is improved. Because the side rails 101 extend out of the bed body 100, after the stretcher vehicle approaches the bed body 100, the side rails 101 are easily extruded to the stretcher vehicle in the lifting process of the bed body 100, and if the stretcher vehicle continues to lift, the stretcher vehicle and the side rails 101 are damaged, so that potential safety hazards are brought.

The connection structure of the side rail 101 to the bed 100 is shown in fig. 2 and 3. In the present embodiment, the obstacle detection mechanism 200 serves as a main body support structure of the side rail 101, that is, the front, middle and rear portions of the side rail 101 are connected to the bed 100 through the obstacle detection mechanism 200. Referring to fig. 3, side rails 101 are installed at both sides of the bed 100 by the sensing mechanism 200.

In the present embodiment, the obstacle detecting mechanism 200 may include a link assembly, a fixing sleeve 3, an elastic return member, a contact portion, a sensing member, and the like. As shown in fig. 4, the fixing sleeve 3 can be fixedly mounted on the side surface of the bed body 100 by, for example, screws, a through hole 31 is formed in the middle of the fixing sleeve 3, and the connecting rod assembly penetrates through the fixing sleeve 3 through the through hole 31. The diameter of the through hole 31 is larger than that of the connecting rod assembly, so that after the connecting rod assembly is assembled, a movable gap is formed between the connecting rod assembly at the position of the through hole 31 and the inner part of the through hole 31.

The connecting rod assembly penetrates through the fixing sleeve 3, and for convenience of description, one end of the connecting rod assembly extending out of the bed 100 is defined as a first end a, and one end of the connecting rod assembly located in the bed 100 is defined as a second end b. The first end a of the connecting rod assembly is fixedly connected with the side rail 101, and the second end b is provided with a sensing assembly. In the present embodiment, the side rail 101 is attached to the first end a of the link assembly and extends out of the scanning bed, so that the side rail 101 serves as a contact portion where the detection mechanism contacts an obstacle, and for example, when the scanning bed is lifted and lowered, the side rail 101 is pressed against the stretcher, and the upper and lower end surfaces of the side rail 101 directly contact the stretcher to form a contact portion. Specifically, as shown in fig. 4, the link assembly includes a side rail pillar 11 and a connecting rod 12, one end of the side rail pillar 11 is fixedly connected to the side rail 101, for example, by a key pin or the like, and the other end is fixedly connected to one end of the connecting rod 12, for example, by a screw structure.

The elastic reset assembly comprises a floating block 21 and an elastic piece, a through shaft hole 212 is formed in the middle of the floating block 21, and the connecting rod assembly penetrates through the floating block through the shaft hole 212. With continued reference to FIG. 4, slider 21 is disposed between connecting rod 12 and side rail brace 11, and the connecting end of connecting rod 12 and side rail brace 11 is provided with a shoulder structure having a diameter greater than the diameter of shaft bore 212 to axially retain slider 21 after connecting rod 12 and side rail brace 11 are assembled. The position that connecting rod 12 and axle hole 212 of slider 21 cooperate is equipped with spacing plane, and axle hole 212 corresponds and is equipped with shape fit's spacing plane to when connecting rod 12 runs through axle hole 212, carry out circumference spacing to slider 21, prevent that slider 21 from rotating around the axis of connecting rod 12.

In the present embodiment, the assembly structure of the elastic return assembly, the connecting rod assembly and the fixing sleeve 3 is as shown in fig. 5 and 6. Referring to fig. 5 and 6, the slider 21 is mounted between the connecting rod 12 and the side rail brace 11, the side rail brace 11 and the connecting rod 12 are axially fixedly connected, and the axial location is formed by the shaft shoulders on both sides of the slider 21. The diameter of the shoulder position of the connecting rod 12 is smaller than that of the through hole 31 of the fixing sleeve 3, so that a movable gap is formed between the connecting rod 12 and the inner wall of the through hole 31.

With continued reference to fig. 4, the bottom of the slider 21 is provided with a boss 211 structure, and the elastic member is disposed on the opposite side of the shaft hole 212 in the radial direction from the boss 211, i.e., the boss 211 and the elastic member are disposed on both sides of the shaft hole in the radial direction. As shown in fig. 6, after the slider 21 is assembled with the retainer bush 3, the boss 211 abuts on one side surface of the retainer bush 3, and since the boss 211 protrudes from the side surface of the slider 21, a movable gap is formed between the slider 21 and the retainer bush 3. One end of the elastic element is abutted against the fixing sleeve 3, and the other end of the elastic element is abutted against the floating block 21, namely when the elastic element is compressed, the upper part of the floating block 21 can approach the fixing sleeve 3, and after the external force disappears, the elastic force of the elastic element drives the floating block 21 to reset.

In the present embodiment, the elastic member is a spring plunger 221, and the spring plunger 221 includes a housing, and a ball 221a and a spring 221b provided in the housing. The slider 21 is provided with a through mounting hole, the outer shell of the spring plunger 221 is provided with an external thread, and the mounting hole is provided with an internal thread, so that the spring plunger 221 is fixedly mounted in the mounting hole through the thread, and meanwhile, the plunger nut 222 is axially fixed on the spring plunger 221. As shown in fig. 6, the ball 221a of the assembled spring plunger 221 abuts against the side wall of the fixing sleeve 3, and one end of the spring 221b abuts against the ball 221a and the other end abuts against the inner wall of the housing. As can be seen from the figure, since the ball 221a is in contact with the side wall of the fixing sleeve 3, the expansion and contraction of the ball 221a is more smooth and stable when the spring plunger 221 is compressed.

It should be noted that the present embodiment is merely a preferable example, and does not limit the present invention. For example, the assembly of the spring plunger and the floating block can also adopt other modes, for example, a blind hole is formed in the mounting hole, and the spring plunger is mounted in the blind hole; for another example, the spring plunger may also adopt other forms of elastic members, such as a compression spring and the like; the purpose of the projections 211 is, for example, to create a clearance between the slider 21 and the sleeve 3, which may be any type of protruding structure, and which may be provided in any position suitable for implementation. The invention is not limited in this regard.

Further, in the present embodiment, considering the practical application scenario of the scanning bed, the cases where collision compression is mainly generated are as follows: the bed body is extruded with the stretcher during the descending process, so the implementation mode is implemented for the scene. Specifically, when the side rail 101 is pressed against the stretcher, the force of the stretcher is upward due to the descending state of the side rail 101, so that the side rail 101 is tilted upward, that is, the first end a of the connecting rod assembly is tilted upward, and the corresponding second end b is tilted downward. It can be seen that the slider 21 is moved in a state of being slightly rotated counterclockwise in the direction shown in fig. 6. Therefore, in the present embodiment, the spring plunger 221 and the boss 211 are provided at positions respectively on the upper and lower sides of the slider 21, thereby providing an upper compression movement space.

With continued reference to fig. 4, in the present embodiment, the left and right sides of the side surface of the fixing sleeve 3 engaged with the slider 21 are respectively provided with a lug 32, and the inner side wall of the lug 32 is provided with a limit plane structure. The floating block 21 is arranged between the two lugs 32, and the left side and the right side of the floating block 21 are provided with corresponding limiting planes, so that when the floating block 21 is installed between the two lugs 32, two acting side walls of the floating block 21 are respectively abutted against the limiting planes of the two lugs 32, and the movement of the floating block 21 in the circumferential direction is limited.

In this embodiment, the left and right sides of the slider 21 are respectively rotatably connected to the two lugs 32, that is, the lugs 32 and the side walls of the slider 21 are provided with assembly holes, and the assembly holes are sequentially inserted into the two assembly holes through the rotating shaft 33, so that the slider 21 can rotate around the rotating shaft. Based on the above, in the usage scenario of the scanning bed, the rotation direction of the slider 21 is relatively fixed, so that the axis direction of the rotating shaft 33 is perpendicular to the connecting line of the center of the mounting hole and the shaft hole, thereby ensuring that the spring plunger 221 is located at the symmetric center line of the slider 21, and providing a more stable elastic force.

A sensing assembly is provided at the second end b of the linkage assembly, the sensing assembly comprising a sensor 41 and a trigger 42. As shown in fig. 4, in the present embodiment, the sensor 41 is a photoelectric sensor, and the trigger 42 is a stopper. The photoelectric sensor is fixedly arranged on the bed body 100, and the sensing end of the sensor detects whether the optical signal is shielded. Separation blade fixed mounting is at the free end of connecting rod 12, and the axle head of connecting rod 12 is equipped with fixed block 51, and connecting hole has been seted up to fixed block 51 and separation blade, and fixing bolt 52 passes separation blade and fixed block 51's connecting hole in proper order, fixes separation blade and fixed block 51 spiro union at the axle head of connecting rod 12.

It should be noted that, in some embodiments, the sensor may also adopt any other form of sensor or micro switch, and the trigger may also be a different form of trigger that is set according to the trigger form of the sensor, and the invention is not limited to this.

The structure of the detection mechanism in the present embodiment is explained above, and the operation principle of the detection mechanism is explained below with reference to fig. 5 and 6.

When the detection mechanism is assembled, the fixed sleeve 3 is fixedly installed on the bed body through bolts, the spring plunger 221 is screwed in the installation hole of the floating block 21, and the floating block 21 is rotatably connected onto the fixed sleeve 3 through the rotating shaft 33. One end of the side rail stay 11 is fixedly coupled to the side rail 101, and the trigger 42 is attached to one end of the connecting rod 12 by a fixing bolt 52. The free end of the connecting rod 12 passes through the fixing sleeve 3 and the floating block 21 to be fixedly installed with the free end of the side rail strut 11, and the assembly is completed.

When the side rail 101 is squeezed without an obstacle, the connecting rod assembly is kept in the state shown in fig. 5, the trigger 42 is positioned outside the photoelectric sensor, the photoelectric sensor continuously detects a light signal, and the working condition is normal. When the side rail 101 is squeezed during the descending process, an obstacle applies an upward force to the side rail 101, and since the side rail 101, the link assembly and the slider 21 are all rigidly connected, the link assembly drives the slider 21 to rotate counterclockwise in the position shown in fig. 6, and the ball 221a of the spring plunger 221 compresses the spring 221 b. The second end of the linkage assembly moves downward and the trigger 42 shields the sensing end of the photoelectric sensor downward so that the sensor detects an abnormal signal and sends the signal to the control end. The control end controls the equipment to stop moving or gives an alarm and the like according to the signal, so that the equipment is prevented from continuously descending to cause the damage of the side rails.

After the obstacle is released, since the side rail 101 is no longer subjected to the force of the obstacle, the spring 221b of the spring plunger 221 pushes the slider 21 to return, and the link assembly is returned to rotate clockwise in the direction shown in fig. 5. After the connecting rod assembly is reset, the trigger piece 42 does not shield the sensing end of the photoelectric sensor any more, and the abnormal signal is removed.

While the structure and the operation principle of the obstacle detecting mechanism in the present embodiment have been described above, it should be noted that the present invention may have other alternative embodiments in addition to the above embodiments.

In an alternative embodiment, the difference from the above described embodiment is that the structure of the resilient return assembly is as shown in fig. 7. In the present embodiment, elastic members, such as the spring plungers 221, are provided at both upper and lower ends of the slider 21, and the two spring plungers 221 are symmetrically provided. In this embodiment, the return spring assembly may provide spring force in both directions, i.e., an obstacle may be detected during both side rail lifts and lowers. The working principle of the side rail descending process is the same as the above embodiment, and is not described in detail. When the side rail ascends, when the side rail is extruded by an obstacle, for example, the side rail is blocked by a stretcher vehicle to ascend, the side rail is subjected to downward acting force of the stretcher vehicle, so that the spring plunger 221 positioned below is compressed, the trigger piece positioned at the second end of the connecting rod assembly rotates upwards, and the corresponding sensor can be arranged above the trigger piece at the same time, so that the obstacle detection in the ascending process can be realized.

In another alternative embodiment, a plurality of elastic members can be arranged on the slider 21 around the shaft hole 212, the rotating connection between the slider 21 and the fixing sleeve 3 is eliminated, the slider can move in multiple degrees of freedom, and sensors in multiple directions are arranged at the second end of the connecting rod assembly for detection, so that the obstacle extrusion detection in multiple stress directions of the side rail is provided. The implementation of the embodiments may be realized by a person skilled in the art by combining the above embodiments, and repeated descriptions are omitted.

In still another alternative embodiment, the above embodiment is merely illustrative of the obstacle detecting mechanism of the present invention, and does not limit the present invention. The obstacle detection mechanism provided by the invention is not limited to the side rail of the scanning bed, and can be used for any other motion equipment which is suitable for implementation, such as C-shaped arm motion detection of a contrast equipment; and for example, to obstacle detection in any other part of the scanning bed, such as a bed plate.

In a further alternative embodiment, the difference with respect to the above-described embodiment is that the elastic return assembly may be absent, i.e. not employing elastic return. When the side rail encounters an obstacle in the descending process, the connecting rod assembly rotates, and the sensor is triggered. After the barrier is eliminated, the self gravity of the side rail can be used for driving the connecting rod assembly to reset. This embodiment is suitable for the moment on the side of the side rail being much larger than the moment on the side of the inductor, which is less stable to reset than the above-mentioned solution using elastic reset.

In yet another alternative embodiment, the difference from the above embodiment is that the detection mechanism may not be provided with the fixing sleeve 3, for example, a through hole is formed on the bed frame of the scanning bed, the connecting rod assembly penetrates through the bed frame of the scanning bed through the through hole, and the diameter of the through hole is larger than that of the connecting rod assembly, so as to ensure that the connecting rod assembly can move under the action of the obstacle. Meanwhile, in all the above embodiments, an elastic material or an elastic structure may be further disposed in the clearance between the via hole and the connecting rod assembly, for example, a rubber ring is disposed between the via hole and the connecting rod assembly, and when the first end of the connecting rod assembly is pressed by an acting force of an obstacle, the connecting rod assembly compresses the rubber ring, so that the connecting rod assembly rotates. Because the via hole and the connecting rod assembly have a movable gap, the connecting rod assembly can collide with the wall of the via hole when being extruded and rotated by the barrier, and the elastic material or the elastic structure is arranged, so that the collision can be effectively avoided, the service life is prolonged, and the use experience is improved.

By the above, obstacle detection mechanism among this embodiment can receive the obstacle collision extrusion when the contact site, and link assembly receives the obstacle effort and takes place the motion to the inductor detects trigger signal, and then can be according to trigger signal controlgear or remind unusually, effectively prevents that the sports equipment from continuing to move and causing equipment damage, adopts elasticity to reset simultaneously, and stability is better. On the other hand, the obstacle detection mechanism provided by the invention can be arranged on a motion device such as a scanning bed, so that the obstacle detection in the lifting process of the scanning bed is realized, an anti-collision ground rail is not required to be arranged, a detected person can use the scanning bed conveniently, and the risk of secondary injury is reduced.

In a second aspect, the invention further provides a side rail structure, which can be referred to fig. 2 and 3, and includes a side rail and the detection mechanism 200 described in any of the above embodiments, wherein the first end a of the link assembly is fixedly connected with the side rail, and the side rail is connected to the apparatus main body through the detection mechanism 200, so as to detect whether the side rail is impacted and pressed by an obstacle during the movement of the apparatus.

It should be noted that the side rail structure provided by the present invention is not limited to the scanning bed, and may be any other protective rail suitable for implementing the moving equipment. By detecting obstacles on the protective side rails, the equipment is prevented from being collided and extruded by the obstacles in the movement process.

In a third aspect, the present invention further provides a scanning bed, which can refer to fig. 1 to 3. The scanning bed comprises a body, wherein the body comprises a bed body 100, a lifting structure arranged below the bed body 100 and a conveying structure arranged in the bed body 100. Both sides of the bed body 100 are provided with side rails 101, the side rails 101 extend out of the bed body 100 in the horizontal direction, and the side rails 101 are connected with the bed body 100 through the obstacle detecting mechanism 200 according to any one of the above embodiments. For example, in the embodiment shown in fig. 2, the front, middle and rear portions of the side rails 101 are connected to the bed 100 by the obstacle detecting mechanism 200.

It should be noted that in some embodiments, the obstacle detection mechanism 200 may serve as only one connection structure, and all of the detection mechanisms 200 are not necessarily provided with sensors. For example, in the present embodiment, the sensor may be provided only in the detection mechanism 200 located at the rear end, and the detection mechanisms 200 at the front and middle portions may be merely used as the connection structure. I.e. in a plurality of connections of the side rails, it suffices to ensure at least one inductor.

Meanwhile, in some embodiments, the detection mechanism 200 is not limited to detecting obstacles on the side rails of the scanning bed, and may be provided at the position of the top plate 103 to detect the top plate 103, for example. The invention is not limited in this regard. Those skilled in the art can implement the method based on the above disclosure, and will not be described in detail herein.

In a fourth aspect, the present invention provides a CT apparatus comprising a scanning bed according to any of the above embodiments.

According to the scanning bed and the CT equipment provided by the invention, when the contact part is collided and extruded by the barrier, the connecting rod assembly moves under the action of the barrier, so that the sensor detects the trigger signal, the scanning bed can be controlled to stop or remind abnormality according to the trigger signal, and the equipment damage caused by the continuous movement of the scanning bed is effectively prevented. On the other hand, need not to set up crashproof ground rail, be convenient for by survey person use scanning bed, reduce the injured risk of secondary

It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims

1. An obstacle detection mechanism suitable for contact detection with an obstacle during movement of an exercise apparatus, the detection mechanism comprising:

the induction assembly comprises an inductor (41) and a trigger piece (42), the trigger piece (42) is fixedly arranged at the second end of the connecting rod assembly, and the inductor (41) induces a trigger signal in the movement process of the trigger piece (42).

2. The obstacle detecting mechanism according to claim 1, characterized by further comprising:

and the elastic resetting assembly is arranged on the connecting rod assembly and provides elastic force for overcoming the acting force of the barrier for the connecting rod assembly.

3. The obstruction detection mechanism of claim 2, wherein the resilient return assembly comprises:

the connecting rod assembly penetrates through the floating block (21) through the shaft hole (212) and is fixedly connected with the floating block (21);

the elastic piece is arranged on one side end face of the floating block (21), one end of the elastic piece is abutted against the floating block (21), and the other end of the elastic piece is suitable for being abutted against the support; when the connecting rod assembly moves under the action of the acting force of the obstacle, at least one elastic piece provides an elastic force for overcoming the acting force of the obstacle.

4. Obstacle detecting mechanism according to claim 3,

the moving equipment is characterized by further comprising a fixing sleeve (3), wherein the fixing sleeve (3) is suitable for being fixedly arranged on the moving equipment, a through hole (31) for the connecting rod assembly to penetrate through is formed in the middle of the fixing sleeve, and the diameter of the through hole (31) is larger than that of the connecting rod assembly; the floating block (21) is arranged on the fixed sleeve (3), and one end of the elastic piece is abutted against one side face of the fixed sleeve (3).

5. Obstacle detecting mechanism according to claim 4,

the elastic reset component comprises an elastic piece;

the side end face of the floating block (21) is provided with a boss (211), the boss (211) and the elastic piece are respectively arranged on two sides of the axial hole (212) in the radial direction, and the boss (211) and one end of the elastic piece are abutted to one side face of the fixed sleeve (3).

6. The obstacle detecting mechanism according to claim 5,

the elastic piece is a spring plunger (221), the floating block (21) is provided with a mounting hole, and the spring plunger (221) is fixedly arranged in the mounting hole.

7. The obstacle detecting mechanism according to claim 6,

fixed cover (3) lie in via hole (31) radial both sides on the side and be equipped with lug (32) respectively, slider (21) are located two between lug (32), and respectively with two lug (32) rotate and are connected, slider (21) pivoted axis perpendicular to the mounting hole with the line at shaft hole (212) center.

8. Obstacle detecting mechanism according to any one of claims 1 to 7,

the sensor (41) comprises a light-sensitive sensor or a micro-touch switch; the trigger member (42) includes a catch fixedly mounted to an axial end of the second end of the linkage assembly.

9. A side rail structure, comprising:

a side rail (101); and

the detection mechanism according to any one of claims 1 to 8, said first end of said linkage assembly being fixedly connected to said side rail (101), said side rail (101) forming said contact portion, said detection mechanism acting as a body support structure for said side rail (101).

10. A scanning bed, comprising:

a body; and

the detection mechanism according to any one of claims 1 to 8, provided to the body.

11. The scanning bed of claim 10,

the body comprises a bed body (100) and side rails (101), and the side rails (101) are connected to two sides of the bed body (100) through at least one detection mechanism; the inductor (41) is fixedly arranged on the bed body (100); the side rail (101) is fixedly connected to a shaft end of the first end of the connecting rod assembly to form the contact portion.

12. A CT apparatus, comprising a scanning couch according to claim 10.