阅读说明：本技术 限束器及x光机 (Beam limiter and X-ray machine ) 是由 陈旭 陈宏伟 秦启兴 袁晨艳 于 2019-12-19 设计创作，主要内容包括：本发明涉及一种限束器,包括箱体、滤过组件、调节组件及传动绳。箱体包括主体及基板,所述主体具有一容置腔及与所述容置腔连通的开口,所述基板连接于所述主体的开口处；滤过组件绕第一轴线枢转连接于所述基板朝向所述容置腔的一侧；调节组件绕与所述第一轴线呈角度的第二轴线枢转连接于所述基板,且所述调节组件一端伸出所述主体；传动绳绕设于所述滤过组件及所述调节组件位于所述容置腔的部分之间,以使所述调节组件的转动与所述滤过组件的转动相互联动。该限束器只需要开设一个供调节组件的一端伸出的孔即可,有效地减小了开设孔的大小,从而有效地减少了内部的辐射泄露,确保了操作人员的健康。本发明还涉及一种X光机。(The invention relates to a beam limiter, which comprises a box body, a filtering component, an adjusting component and a transmission rope. The box body comprises a main body and a substrate, the main body is provided with an accommodating cavity and an opening communicated with the accommodating cavity, and the substrate is connected to the opening of the main body; the filtering component is pivotally connected to one side of the base plate, which faces the accommodating cavity, around a first axis; the adjusting assembly is pivotally connected to the base plate around a second axis which forms an angle with the first axis, and one end of the adjusting assembly extends out of the main body; the transmission rope is wound between the filtering component and the part of the adjusting component positioned in the accommodating cavity, so that the rotation of the adjusting component and the rotation of the filtering component are linked mutually. The beam limiter only needs to be provided with a hole extending out of one end of the adjusting component, and the size of the hole is effectively reduced, so that radiation leakage inside the beam limiter is effectively reduced, and the health of operators is ensured. The invention also relates to an X-ray machine.)

1. A beam limiter, comprising:

the box body comprises a main body and a substrate, wherein the main body is provided with an accommodating cavity and an opening communicated with the accommodating cavity, and the substrate is connected to the opening of the main body;

the filtering assembly is pivotally connected to one side, facing the accommodating cavity, of the base plate around a first axis;

the adjusting assembly is pivotally connected to the base plate around a second axis forming an angle with the first axis, and one end of the adjusting assembly extends out of the main body; and

and the transmission rope is wound between the filtering component and the part of the adjusting component positioned in the accommodating cavity, so that the rotation of the adjusting component and the rotation of the filtering component are linked mutually.

2. The beam limiter of claim 1, wherein the filter assembly comprises a first rotating shaft, a first rope pulley and a filter disc, the first rotating shaft is rotatably mounted on the base plate around the first axis, and the first rope pulley and the filter disc are both connected to the first rotating shaft, so that the first rope pulley and the filter disc can rotate synchronously with the first rotating shaft;

the transmission rope is wound on the first rope wheel.

3. The beam limiter of claim 2, wherein the adjusting assembly comprises a second rotating shaft, a second rope pulley and an adjusting rod, the second rotating shaft is rotatably connected to the base plate around the second axis, and the second rope pulley and the adjusting rod are both connected to the second rotating shaft, so that the second rope pulley and the adjusting rod can rotate synchronously with the second rotating shaft;

the transmission rope is wound on the second rope wheel.

4. The beam limiter of claim 3, wherein a radial dimension of the second sheave is greater than a radial dimension of the first sheave.

5. The beam limiter as claimed in claim 2, wherein the base plate has a light-transmitting opening communicating with the receiving cavity, the filter disc includes a rotating wheel and a plurality of filter sheets, the rotating wheel is connected to a first rotating shaft to be rotatable about the first axis;

the rotating wheel is provided with a plurality of mounting openings, each filter sheet is correspondingly mounted on one mounting opening, the rotating process of the rotating wheel comprises a plurality of filtering positions, and when the rotating wheel is located at the filtering positions, a corresponding mounting opening corresponding to the light-transmitting opening exists, so that light can pass through the corresponding mounting openings and the light-transmitting opening.

6. The beam limiter as claimed in claim 5, further comprising a positioning assembly connected to a side of the base plate facing the accommodating cavity, the positioning assembly having a positioning end;

the periphery of the rotating wheel is provided with a plurality of positioning parts which can be matched with the positioning ends, and when one of the positioning parts is matched with the positioning end, the positioning end provides resistance for retarding the rotation of the rotating wheel.

7. The beam limiter of claim 1, further comprising a connecting plate having one end connected to the base plate and the other end protruding from the base plate and extending into the receiving cavity, wherein the adjusting assembly is pivotally connected to the end of the connecting plate protruding from the base plate about the second axis.

8. The beam limiter as claimed in claim 1, further comprising two sets of guide assemblies respectively disposed at opposite sides of the filtering assembly;

each group of guide assemblies comprises a support and at least two guide wheels, the support is connected to the base plate, the at least two guide wheels of each group are connected to the support and are arranged at intervals, the transmission ropes are wound on the guide wheels, and the guide wheels are used for guiding the transmission of the transmission ropes.

9. The beam limiter of claim 8, wherein the second axis is perpendicular with respect to the first axis;

said at least two guide wheels comprise said guide wheel having an axis of rotation inclined with respect to said second axis.

10. An X-ray machine, characterized in that it comprises a beam limiter according to any one of claims 1-9.

Technical Field

The invention relates to the technical field of medical instruments, in particular to a beam limiter and an X-ray machine.

Background

In an X-ray machine, a beam limiter is usually mounted under a bulb tube, which emits X-rays that are projected onto a subject through a blade opening inside the beam limiter. The beam limiter is also usually provided with a filter inside, and the filter plays a role of filtering soft rays. The filters in the existing beam limiter are switched by a paddle or lever structure. However, in the switching mode, a larger opening needs to be formed in the beam limiter so as to allow the plectrum or the lever structure to move, and the larger opening can cause more radiation leakage inside and affect the health of operators.

Disclosure of Invention

Therefore, it is necessary to provide a beam limiter and an X-ray machine which can effectively reduce radiation leakage in the beam limiter and ensure the health of operators, aiming at the problems that the radiation leakage in the existing beam limiter is too much and the health of the operators is affected.

A beam limiter, comprising:

the box body comprises a main body and a substrate, wherein the main body is provided with an accommodating cavity and an opening communicated with the accommodating cavity, and the substrate is connected to the opening of the main body;

the filtering assembly is pivotally connected to one side, facing the accommodating cavity, of the base plate around a first axis;

the adjusting assembly is pivotally connected to the base plate around a second axis forming an angle with the first axis, and one end of the adjusting assembly extends out of the main body; and

and the transmission rope is wound between the filtering component and the part of the adjusting component positioned in the accommodating cavity, so that the rotation of the adjusting component and the rotation of the filtering component are linked mutually.

Through setting up foretell beam limiter, the filter subassembly is used for filtering soft ray, and the filter subassembly rotates the in-process and can change the filter effect to soft ray, and the rotation of filter subassembly is through the rotation of driving rope and adjusting part linkage each other, that is to say the accessible rotates adjusting part and realizes the rotation of filter subassembly, and the main part is stretched out to adjusting part's one end, therefore operating personnel only need rotate the adjusting part and stretch out the one end of main part and can realize the regulation to filter the subassembly. Compared with the traditional mode of adjusting through a shifting piece or a lever structure, the beam limiter only needs to be provided with a hole for extending one end of the adjusting component, so that the size of the hole is effectively reduced, radiation leakage in the inner part is effectively reduced, and the health of operators is ensured.

In one embodiment, the filter assembly comprises a first rotating shaft, a first rope pulley and a filter disc, the first rotating shaft is rotatably mounted on the base plate around the first axis, and the first rope pulley and the filter disc are both connected to the first rotating shaft, so that the first rope pulley and the filter disc can synchronously rotate along with the first rotating shaft;

the transmission rope is wound on the first rope wheel.

In one embodiment, the adjusting assembly includes a second rotating shaft, a second rope pulley and an adjusting rod, the second rotating shaft is rotatably connected to the base plate around the second axis, and the second rope pulley and the adjusting rod are both connected to the second rotating shaft, so that the second rope pulley and the adjusting rod can rotate synchronously with the second rotating shaft;

the transmission rope is wound on the second rope wheel.

In one embodiment, the radial dimension of the second sheave is greater than the radial dimension of the first sheave.

In one embodiment, the base plate is provided with a light-transmitting opening communicated with the accommodating cavity, the filter disc comprises a rotating wheel and a plurality of filter sheets, and the rotating wheel is connected with a first rotating shaft so as to rotate around the first axis;

the rotating wheel is provided with a plurality of mounting openings, each filter sheet is correspondingly mounted on one mounting opening, the rotating process of the rotating wheel comprises a plurality of filtering positions, and when the rotating wheel is located at the filtering positions, a corresponding mounting opening corresponding to the light-transmitting opening exists, so that light can pass through the corresponding mounting openings and the light-transmitting opening.

In one embodiment, the beam limiter further comprises a positioning component, the positioning component is connected to one side of the substrate, which faces the accommodating cavity, and the positioning component is provided with a positioning end;

the periphery of the rotating wheel is provided with a plurality of positioning parts which can be matched with the positioning ends, and when one of the positioning parts is matched with the positioning end, the positioning end provides resistance for retarding the rotation of the rotating wheel.

In one embodiment, the beam limiter further comprises a connecting plate, one end of the connecting plate is connected to the base plate, the other end of the connecting plate protrudes out of the base plate and extends into the accommodating cavity, and the adjusting assembly is pivotally connected to one end, protruding out of the base plate, of the connecting plate around the second axis.

In one embodiment, the beam limiter further comprises two groups of guide assemblies, and the two groups of guide assemblies are respectively arranged on two opposite sides of the filtering assembly;

each group of guide assemblies comprises a support and at least two guide wheels, the support is connected to the base plate, the at least two guide wheels of each group are connected to the support and are arranged at intervals, the transmission ropes are wound on the guide wheels, and the guide wheels are used for guiding the transmission of the transmission ropes.

In one embodiment, the second axis is perpendicular with respect to the first axis;

said at least two guide wheels comprise said guide wheel having an axis of rotation inclined with respect to said second axis.

An X-ray machine comprising a beam limiter as described above.

Drawings

Fig. 1 is a schematic structural diagram of a beam limiter according to an embodiment of the present invention.

Fig. 2 is an isometric view of the beam limiter shown in fig. 1.

Fig. 3 is a side view of the beam limiter shown in fig. 1.

Fig. 4 is a front view of the beam limiter shown in fig. 1.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, a beam limiter 10 according to an embodiment of the present invention includes a housing (not shown), a filter assembly 14, an adjustment assembly 16, and a transmission rope 18.

The box body comprises a main body and a substrate 12, wherein the main body is provided with an accommodating cavity and an opening communicated with the accommodating cavity, and the substrate 12 is connected to the opening of the main body.

The filter assembly 14 is pivotally connected to a side of the base plate 12 facing the receiving cavity about a first axis.

The adjustment assembly 16 is pivotally connected to the base plate 12 about a second axis at an angle to the first axis, and one end of the adjustment assembly 16 extends out of the body.

The driving rope 18 is wound around the filtering component 14 and the part of the adjusting component 16 located in the accommodating cavity, so that the adjusting component 16 and the filtering component 14 are mutually linked in rotation.

By arranging the beam limiter, the filtering component 14 is used for filtering soft rays, the filtering effect on the soft rays can be changed in the rotating process of the filtering component 14, the rotation of the filtering component 14 is mutually linked with the rotation of the adjusting component 16 through the transmission rope 18, namely, the rotation of the filtering component 14 can be realized by rotating the adjusting component 16, and one end of the adjusting component 16 extends out of the main body, so that an operator can realize the adjustment on the filtering component 14 only by rotating one end of the adjusting component 16 extending out of the main body. Compared with the traditional mode of adjusting through a plectrum or lever structure, the beam limiter only needs to be provided with a hole for one end of the adjusting component 16 to extend out, the size of the hole is effectively reduced, so that the radiation leakage in the beam limiter is effectively reduced, and the health of operators is ensured.

In some embodiments, the main body includes a bottom plate and a plurality of side plates, the side plates are fixedly connected to the peripheral edge of the bottom plate to form an accommodating cavity with an opening by enclosing with the bottom plate, and the base plate 12 is fixedly connected to one ends of the side plates departing from the bottom plate to form a box body by enclosing.

Furthermore, one end of the adjusting component 16 extends out of the main body from one side plate, and the side plate is further provided with other structures for adjusting the beam limiter, so that the beam limiter can be conveniently adjusted on the same side without adding structures on other side plates, and the integral aesthetic property of the beam limiter is ensured.

It should be noted that the main body and other structures are not shown in the drawings to show the internal structure of the main body more clearly, the base plate is only used for distinguishing the base plate 12 and is not limited to be located at the bottom, and the driving string 18 is not shown in fig. 2-4 and does not affect the understanding of the present invention.

In some embodiments, the filter assembly 14 includes a first rotating shaft 142, a first rope pulley 144 and a filter disc, the first rotating shaft 142 is rotatably mounted on the base plate 12 about a first axis, and the first rope pulley 144 and the filter disc are connected to the first rotating shaft 142 such that the first rope pulley 144 and the filter disc rotate with the first rotating shaft 142 about the first axis and are rotated synchronously.

Further, the base plate 12 has a light-transmitting opening 122 communicating with the receiving cavity, the filter disc includes a rotating wheel 146 and a plurality of filter sheets, the rotating wheel 146 is connected to the first rotating shaft 142 to rotate around the first axis, and the rotating wheel 146 has a plurality of mounting openings 1462, each filter sheet is correspondingly mounted to one of the mounting openings 1462.

The rotation of the wheel 146 includes a plurality of filtering positions, and when the wheel 146 is in the filtering position, a corresponding mounting opening 1462 is formed corresponding to the light-transmitting opening 122, so that light can pass through the corresponding mounting opening 1462 and the light-transmitting opening 122. In other words, if the mounting opening 1462 is provided with a filter sheet, the light will pass through the filter sheet, so that the filter sheet can filter the soft rays in the light.

Specifically, the filter sheets within different mounting openings 1462 provide different filtering effects on soft radiation. Thus, the wheel 146 can be rotated to different filtering positions to achieve different filtering effects. It should be noted that there is a filter element not mounted within mounting opening 1462 as shown, i.e., in the filtered position, light is not filtered but passes directly through mounting opening 1462.

In some embodiments, the number of mounting openings 1462 is preferably 4, and 4 mounting openings 1462 are uniformly spaced along the circumference of the filter disk.

In some embodiments, the adjusting assembly 16 includes a second rotating shaft rotatably connected to the base plate 12 about a second axis, a second rope pulley 162 and an adjusting rod 164, both of which are connected to the second rotating shaft, such that the second rope pulley 162 and the adjusting rod 164 rotate with the second rotating shaft about the second axis and, for synchronous rotation, the other end of the adjusting rod 164, which is far from the second rope pulley 162, extends out of the main body.

An operator can directly rotate the adjusting rod 164 to drive the second rope wheel 162 to rotate, the diameter of the adjusting rod 164 is far smaller than the radial size of the second rope wheel 162, and the adjusting rod 164 can reduce the size as far as possible on the premise that the strength is guaranteed and the operator can conveniently rotate, so that a hole formed when the adjusting rod 164 penetrates through the main body is smaller, and the leakage of internal radiation is reduced.

It should be noted that, as described above, the first sheave 144 and the filter disc may be synchronously rotated and the second sheave 162 and the adjustment lever 164 may be synchronously and fixedly connected to the same rotation shaft, and the rotation shaft may be connected to the base plate through a bearing. Of course, in other embodiments, the rotating shaft may be fixedly connected to the base plate 12, and the first rope pulley 144 and the filter disc or the second rope pulley 162 and the adjusting rod 164 are connected to the same bearing, and the inner ring of the bearing is sleeved on the rotating shaft, which is not limited in specific manner.

Further, when the rotation shaft is rotatably coupled to the bearing, the adjustment lever 164 and the second rotation shaft may be separated, that is, the adjustment lever 164 and the second sheave 162 are simultaneously coupled to the second rotation shaft as described in the above embodiment. In other embodiments, the adjustment lever 164 and the second rotating shaft may be an integral structure, the adjustment lever 164 is directly pivotally connected to the bearing, and the second sheave 162 is directly connected to the adjustment lever 164.

In some embodiments, the driving rope 18 is wound around the first and second rope pulleys 144 and 162, respectively, so that the rotation of the first and second rope pulleys 144 and 162 are linked with each other. Further, the radial dimension of the second rope pulley 162 is larger than the radial dimension of the first rope pulley 144, since the transmission between the first rope pulley 144 and the second rope pulley 162 is realized through the transmission rope 18, taking the example that one end of the transmission rope 18 extends out from the first rope pulley 144 and the other end extends into the second rope pulley 162, the extending and extending distances are the same, and the rotation angles are different because the radial dimensions of the two rope pulleys are different.

Based on the radial dimension of the second sheave 162 being greater than the radial dimension of the first sheave 144, the first sheave 144 rotates a greater angle when the second sheave 162 rotates a certain angle. In other words, the rotation of the rotating wheel 146 is to adjust the filter sheets, and even if the rotation angle is close to 360 degrees, all the filter sheets are switched, the second rope wheel 162 does not rotate 360 degrees, the corresponding adjusting rod 164 does not rotate 360 degrees, and the adjustment of an operator is facilitated.

In some embodiments, the beam limiter further comprises two sets of guide assemblies 13, and the two sets of guide assemblies 13 are respectively arranged on two opposite sides of the filter assembly 14 to guide the transmission rope 18, so that the transmission rope 18 is connected between the adjusting assembly 16 and the filter assembly 14.

Further, each group of guide assemblies 13 includes a bracket 132 and at least two guide wheels 134, the bracket 132 is connected to the base plate 12, the at least two guide wheels 134 of each group are connected to the bracket 132 and are arranged at intervals, the transmission rope 18 is arranged through the guide wheels 134, and the guide wheels 134 are used for guiding the transmission of the transmission rope 18.

Referring to fig. 3, in practical applications, the second axis is perpendicular to the first axis, and the at least two guide wheels 134 include a guide wheel 134 having a rotation axis inclined with respect to the second axis, so that the transmission of the transmission rope 18 between the inclined guide wheel 134 and the second rope wheel 162 is smoother.

It can be understood that the driving rope 18 is wound around the wheel-shaped structure and slides, the driving rope 18 has a sliding-in end and a sliding-out end, and for the first rope pulley 144 and the second rope pulley 162, in the process of being driven by the driving rope 18, the driving rope 18 sliding out of the sliding-out end of the first rope pulley 144 enters the sliding-in end of the second rope pulley 162, then slides out of the sliding-out end of the second rope pulley 162 and enters the sliding-in end of the first rope pulley 144, so that an endless driving structure is formed.

It should be noted that if the second axis is perpendicular to the first axis, i.e., the rotation axes of the first sheave 144 and the second sheave 162 are perpendicular to each other, if the transmission rope 18 is directly connected to the first sheave 144 and the second sheave 162, the transmission rope 18 is easily separated from the sheaves due to the inclination of the transmission rope 18 caused by a force during the rotation, and the transmission between the sheaves is hindered by the transmission of the transmission rope 18.

Therefore, in the above embodiment, two sets of guide assemblies 13 are provided, one set of guide assemblies 13 is used for guiding the transmission rope 18 entering the sliding end of the second rope pulley 162 from the sliding-out end of the first rope pulley 144, and the other set of guide assemblies 13 is used for guiding the transmission rope 18 entering the sliding-in end of the first rope pulley 144 from the sliding-out end of the second rope pulley 162.

Meanwhile, since the second axis is perpendicular to the first axis, at least one of the guide pulleys 134 needs to be arranged obliquely (in practical applications, it is certainly sufficient that only one guide pulley 134 is arranged obliquely in each group of guide assemblies 13), so as to ensure that the angle change of the transmission rope 18 occurs on the guide pulley 134 during the process that the transmission rope 18 passes through at least two guide pulleys 134 from the first rope pulley 144 and finally enters the second rope pulley 162, and vice versa. That is, the driving rope 18 is straight between the first sheave 144 and the guide pulley 134, between the adjacent guide pulleys 134, and between the second sheave 162 and the guide pulley 134, to ensure smooth driving.

Referring to fig. 3 and 4, in some embodiments, the first axis is actually a vertical axis, the second axis is a horizontal axis, each set of guide assemblies 13 includes two guide wheels 134, one of the two guide wheels is disposed obliquely with respect to the horizontal direction, the other guide wheel 134 is disposed horizontally, and a connecting line between the two horizontally disposed guide wheels 134 of the two sets of guide assemblies 13 and the first rope wheel 144 is a triangle and is an isosceles triangle, i.e., the two guide wheels 134 are symmetrically disposed on two sides of the first rope wheel 144.

In practical applications, the substrate 12 is horizontally disposed, and the extending direction of the first axis is the front-back direction in fig. 1.

In some embodiments, both guide wheels 134 are located on a side of the first sheave 144 that is distal from the second sheave 162. Thus, the transmission rope 18 is wound around the first rope wheel 144 and the two guide wheels 134 in a large number, that is, the contact surfaces of the transmission rope 18 with the first rope wheel 144 and the two guide wheels 134 are large, so that the phenomenon that the transmission rope 18 slips on the first rope wheel 144 or the guide wheels 134 can be effectively avoided.

Specifically, the guide wheel 134 is a pulley bearing, an inner ring of the pulley bearing is fixedly connected to the bracket 132, and the transmission rope 18 is wound around an outer ring of the pulley bearing to realize transmission.

In some embodiments, the beam limiter further includes a connecting plate 15, one end of the connecting plate 15 is connected to the base plate 12, the other end of the connecting plate 15 protrudes out of the base plate 12 and extends into the accommodating cavity, and the adjusting assembly 16 is pivotally connected to one end of the connecting plate 15 protruding out of the base plate 12.

Further, the connecting plate 15 includes a first connecting portion, an intermediate portion and a second connecting portion that are fixedly connected in sequence, the first connecting portion is fixedly connected to one side of the substrate 12 facing the accommodating cavity, the intermediate portion is disposed at an angle to the first connecting portion and connected to one end of the first connecting portion away from the substrate 12, and the second connecting portion is connected to one end of the intermediate portion away from the first connecting portion and disposed along a vertical direction, i.e., disposed in a direction parallel to the first axis.

Specifically, the second connecting portion is plate-shaped, and the second bearing is disposed at one side of the second connecting portion, so that the axial direction of the second rotating shaft is perpendicular to the axial direction of the first rotating shaft 142, that is, the direction of the second axis is perpendicular to the direction of the first axis.

It will be appreciated in connection with the connecting plate 15 that the axes of rotation of the inclined guide wheels 164 in the above embodiments are both angled with respect to the first and second axes, primarily because the number of guide wheels 134 per set of guide assemblies 13 is two and the sliding in or out ends of the second sheave 162 are located below the sliding in or out ends of the first sheave 144 and are not in the same horizontal plane.

If the guide pulley 134 is on the same horizontal plane, the guide pulley 134 can be directly placed horizontally, and the transmission rope 18 can be wound between the guide pulley 134 and the second rope pulley 162.

In some embodiments, the beam limiter further includes a positioning assembly 17, the positioning assembly 17 is connected to a side of the substrate 12 facing the receiving cavity, the positioning assembly 17 has a positioning end, and a plurality of positioning portions 1464, each of which is capable of matching with the positioning end, are disposed on a peripheral side of the rotating wheel 146, when one of the positioning portions 1464 is matched with the positioning end, the rotating wheel 146 is in the filtering position, and the positioning end provides a resistance force for blocking the rotating wheel 146 from rotating.

When the operator rotates the wheel 146 via the adjustment lever 164 to the filter position, the operator experiences a resistance so that the operator knows that the wheel 146 has rotated to the filter position, and the filter sheet switching is complete.

It should be appreciated that in some instances, it may be desirable to have the first sheave 144 have a radial dimension greater than the radial dimension of the second sheave 162 when fine adjustment is desired. However, in the case of a filter blade change, a quick adjustment is actually required and the precision requirements are not particularly high, while the completion of the filter blade change is also confirmed by the resistance offered by the positioning assembly 17, so that it is preferable that the radial dimension of the second sheave 162 be greater than that of the first sheave 144.

Furthermore, the positioning portion 1464 is a positioning notch, the positioning assembly 17 includes a connecting member 172 and a spring plate 174, the connecting member 172 is connected to the substrate 12, one end of the spring plate 174 is fixedly connected to the connecting member 172, the other end of the spring plate 174 always abuts against the periphery of the rotating wheel 146, and one end of the spring plate 174 away from the connecting member 172 has the above-mentioned positioning end, so that when the rotating wheel 146 rotates to the filtering position, one end of the spring plate 174 away from the connecting member 172 abuts against the positioning notch, thereby providing resistance to rotation of the rotating wheel 146.

Of course, in other embodiments, the positioning portion 1464 may be a positioning protrusion, as long as it is ensured that the positioning end of the positioning assembly 17 matches with the positioning portion, and it is realized that when the wheel 146 rotates to the filtering position, the positioning end provides a rotation resistance to the wheel 146 and is sensed by the operator.

In some embodiments, when the number of the mounting openings 1462 is 4, copper sheets with thicknesses of 0.1 mm, 0.2 mm and 0.3 mm are mounted in three mounting openings 1462, and a copper sheet is not mounted in the remaining one mounting opening 1462, so that an operator can know whether a copper sheet is present in the mounting opening 1462 below the light-transmitting opening 122 or which copper sheet is mounted in the mounting opening 1462 at the time, an indication arrow may be previously provided on the adjustment rod 164, and then a mark corresponding to each mounting opening 1462 is provided on a side plate extending out of the adjustment rod 164, that is, when the arrow points to one of the marks, the mounting opening 1462 corresponding to the mark corresponds to the light-transmitting opening 122 at the time.

It should be noted that in connection with the above-mentioned embodiments, the driving rope 18 may be a steel rope to ensure strength, but in order to ensure the steel rope to be tight, some structure for tightening the steel rope is required, for example, a spring structure is required for tightening the steel rope. The drive cord 18 may be a rubber cord to increase friction and ensure that it does not slip on the sheave or guide pulley 134. Of course, the rope can be made of other materials and can be selected according to actual conditions.

Meanwhile, the driving rope 18 may be in the form of a closed rope, i.e., a structure connected end to end in a loop, and the entire driving rope 18 is in a tight state when it is connected to the first sheave 144, the second sheave 162 and the guide pulleys 134.

The transmission rope 18 may also be a rope that is not connected end to end, and if the transmission rope 18 starts from the first rope pulley 144, the second rope pulley 162 and all the guide wheels 134 are wound and return to the first rope pulley 144, and the wound length is a preset length, then the length of the transmission rope 18 is longer than the preset length in practical application, and when two ends of the transmission rope are connected to the first rope pulley 144 at the same time, a part of the transmission rope is wound around the second rope pulley 162 for one or more turns to ensure the transmission.

The ends of the drive ropes 18, which are not connected end to end, need to be fixed to the same rope pulley or guide pulley 134, and the connection to the same rope pulley is better, and preferably to the second rope pulley 162, and the rope is wound around the second rope pulley 162 by at least one turn, which is practical, because the first rope pulley 144 rotates without one turn, the second rope pulley 162 can rotate by one turn.

Based on the beam limiter, the invention further provides an X-ray machine, which comprises the beam limiter in the embodiment.

Compared with the prior art, the beam limiter and the X-ray machine provided by the invention at least have the following advantages:

1) the switching of the filter sheets can be realized only by arranging a small hole on the box body, so that the leakage of internal radiation is effectively reduced, and the health of operators is ensured.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.