Patent Description:
Magnetic images obtained by magnetocardiography (MCG), magnetoencephalography (MEG), etc. are images of magnetic fields that are produced by human organs and detected by using very sensitive sensors. Taking the magnetocardiography as an example, the magnetocardiography is to obtain an image over the chest by non-invasively recording magnetic fields generated by the electric activity of the heart in a cardiac cycle. The magnetocardiography originated in the early <NUM>. After many years of development, the MCG technology has progressively matured and has been clinically put into practice. At present, MCG examination has been clinically applied in Germany, Japan, Finland, China, etc..

One of the mainstream magnetocardiography methods is to use a magnetocardiography instrument based on an atomic magnetometer. This magnetocardiography method is inexpensive and requires little maintenance, making a wide range of MCG applications possible.

During use of the magnetocardiography instrument, it is first necessary to put a magnetic field detection device directly above and close to the heart of the human body to be detected. Only at this position can detection data with high quality be obtained. However, for most of current apparatuses capable of conveniently adjusting the position of the magnetic field detection device, electrical devices such as an electric motor need to be used, and the introduction of these electrical devices may generate additional interference magnetic fields, thereby affecting the detection results of the magnetic field detection device or even rendering the magnetic field detection device inoperable. Therefore, it is an important subject and research direction in the art to design a position adjustment apparatus capable of avoiding the use of an electrical device while having a good adjustment effect.

<CIT> relates to a biomagnetic field measurement apparatus capable of carrying out exact positioning work and highly sensitive signal detection. To bring a sensor surface close to a body surface while the sensor surface and the body surface are kept parallel, a cryostat is constructed so as to be capable of oscillating and expanding and contracting. A gantry is formed by three supports. A first support is a portal support that supports the whole of the gantry. A second support is supported on the first support, and is rotatable with a first direction being the axis. A third support is supported on the second support, and is movable in the axial direction of the cryostat as viewed from the second support. The cryostat is supported on the third support, and moves integrally with the third support.

According to one aspect of the present disclosure, the present disclosure provides a position adjustment apparatus for adjusting a position of a detection device, the position adjustment apparatus comprising: two support assemblies, each of the support assemblies comprising at least one support rod; a lifting frame arranged between the two support assemblies, the lifting frame having two ends respectively slidably connected to the support rods of the two support assemblies and being configured to move in a height direction of the support rods, the lifting frame comprising a mounting portion for mounting the detection device; and at least one height adjustment assembly arranged on at least one side of the lifting frame where one of the two support assemblies is located and configured to adjust a lifting height of the lifting frame, each height adjustment assembly of the at least one height adjustment assembly comprising: a first pulley and a second pulley arranged in the height direction of the at least one support rod, and rotating shafts of the first pulley and the second pulley being both fixedly mounted on a support assembly arranged on the corresponding side of the lifting frame; and a drive belt wound around the first pulley and the second pulley, the lifting frame being fixedly connected to a predetermined position on the drive belt, the drive belt being configured to drive the lifting frame to move as the first pulley and the second pulley rotate.

In one example, each height adjustment assembly further comprises a locking mechanism, and the locking mechanism comprises: a fixed toothed disk fixedly arranged on the support assembly on the corresponding side of the lifting frame, wherein a hollow portion for accommodating at least a part of the first pulley is provided in the center of the fixed toothed disk, and a plurality of limiting teeth are arranged on an inside periphery of the hollow portion; and a limiting push piece slidably arranged on the first pulley and configured to slide in a radial direction of the first pulley, and the end of the limiting push piece facing the inside periphery of the hollow portion is further provided with complementary teeth that are complementary with the plurality of limiting teeth.

In one example, the first pulley comprises an inner wheel and an outer rotating disk that are coaxial with each other, wherein the drive belt is wound around the inner wheel and the second pulley, the outer rotating disk is accommodated in the hollow portion, and the limiting push piece is arranged on the outer rotating disk.

In one example, the outer rotating disk is provided with a guide groove for accommodating the limiting push piece and allowing the limiting push piece to slide in a radial direction of the outer rotating disk.

In one example, a plurality of limiting protrusions and limiting recesses cooperating with the plurality of limiting protrusions are respectively provided at edges of two sides of the limiting push piece and an inner side of the guide groove, and the limiting push piece has a first position and a second position that are defined jointly by the limiting protrusions and the limiting recesses, and The locking mechanism is configured such that when the limiting push piece is pushed into the first position, the complementary teeth are meshed with at least some of the plurality of limiting teeth to lock the first pulley; and when the limiting push piece is pushed into the second position, the complementary teeth are separated from the plurality of limiting teeth to release the first pulley.

In one example, a shank is further provided on the limiting push piece.

In one example, the support assembly further comprises: a housing forming a cavity for accommodating the support rods and the height adjustment assembly; and a part of the housing corresponding to the outer rotating disk is provided with an opening for exposing at least a part of the outer rotating disk to the exterior of the housing.

In one example, the rotating shafts of the first pulley and the second pulley are both fixedly arranged on the housing of the corresponding support assembly.

In one example, the outer rotating disk further comprises: a handle arranged on the part of the outer rotating disk exposed to the exterior of the housing to facilitate rotation of the outer rotating disk.

In one example, the two support assemblies comprise a first support assembly and a second support assembly, and the lifting frame comprises: a first end plate slidably connected to the support rod of the first support assembly; a second end plate slidably connected to the support rod of the second support assembly; and at least one cross beam, two ends of each cross beam being respectively connected to the first end plate and the second end plate.

In one example, the height adjustment assembly is arranged on one side of the lifting frame where the first support assembly is located; the first support assembly comprises two support rods arranged in parallel, and the height adjustment assembly is arranged between the two support rods; and the first end plate is fixedly provided with two sets of sleeves at the positions corresponding to the two support rods, and the sleeves of each set of sleeves are respectively fitted outside the corresponding support rods.

In one example, the second support assembly comprises one support rod; and the second end plate is fixedly provided with a set of sleeves at the position corresponding to the support rod, and the sleeves are fitted outside the support rod.

In one example, a damping layer is further provided between the sleeve and the corresponding support rod.

In one example, the first end plate is further fixedly provided with an engagement portion, the engagement portion is provided with a slit allowing the drive belt to pass through, and the engagement portion is fixed to a predetermined position of the drive belt by means of a screw traversing the slit.

In one example, at least a part of an upper surface of each cross beam is arranged tilted downwards in a direction from the first end plate to the second end plate.

In one example, the lifting frame further comprises: at least one structural reinforcing rope, two ends of each structural reinforcing rope being respectively connected to two ends of one cross beam; and the upper surface of the cross beam is further provided with a wire guide groove for accommodating the structural reinforcing rope.

In one example, the lifting frame further comprises: at least two sliding rods arranged in parallel, two ends of each sliding rod being respectively directly or indirectly connected to the first end plate and the second end plate; and the mounting portion further comprises a plurality of sleeves, the plurality of sleeves being fitted on the at least two sliding rods such that the mounting portion slides along the sliding rods.

In one example, the mounting portion further comprises an armrest to facilitate pushing the mounting portion to slide.

In one example, the detection device comprises a plurality of magnetometer probes, the mounting portion further comprises a mounting panel, and the mounting panel is provided with a plurality of slotted holes for mounting the plurality of magnetometer probes.

In one example, the position adjustment apparatus is integrally made of a nonmetallic material.

According to another aspect of the present disclosure, the present disclosure further provides a magnetocardiography instrument, comprising: a bed body; the position adjustment apparatus as mentioned above, bottom ends of the two support assemblies of the position adjustment apparatus being respectively slidably connected to edges of two side in a length direction of the bed body such that the position adjustment apparatus slides in the length direction of the bed body; and a plurality of magnetometer probes mounted on the mounting portion of the position adjustment apparatus.

In one example, the bottom ends of the two support assemblies are further provided with a plurality of rollers; and the bed body is further provided with tracks at the positions corresponding to the bottom ends of the two support assemblies, the tracks extending in the length direction of the bed body for accommodating the plurality of rollers.

In one example, the tracks are arranged on left and right sides of the bed body; and the plurality of rollers are arranged on the sides of the bottom ends of the support assemblies facing the bed body so as to be opposite the tracks.

In one example, the bed body is further provided with a rack extending in the length direction thereof, and the position adjustment apparatus further comprises a limiting mechanism, wherein the limiting mechanism comprises: a cam-knob rotatably arranged on the support assembly and comprising a cam portion and a knob portion that are coaxially connected to the cam portion; and a limiting member provided with a cam hole for engagement with the cam portion, one end of the limiting member extending downwards and facing the rack, and the end being further provided with a plurality of snap teeth cooperating with the rack; wherein the limiting mechanism is configured to control the meshing or separation of the snap teeth and the rack by causing the cam portion to drive the limiting member to move up and down by means of rotating the knob portion.

In one example, the rack is arranged on an upper surface of the track; and the limiting member comprises a first section extending downwards and a second section extending toward the bed body, an end of the second section extends into the track, and an upper surface of the end is provided with the snap teeth.

In one example, the magnetocardiography instrument further comprises: a base for bearing the bed body; and a magnetic shielding cabin arranged on the base, wherein the bed body is further configured to slide in a length direction of the base; and the magnetic shielding cabin is configured to cover the position adjustment apparatus when the bed body slides toward the magnetically shielded cabin to a predetermined position.

The position adjustment apparatus of the present disclosure enables free control over the height of the lifting frame by providing support rods and the height adjustment assembly comprising a pulley block. A user can adjust the height of the detection device by manually rotating a first pulley or a second pulley, and the operation is simple and convenient. In addition, no electrical devices such as an electric motor are provided inside the position adjustment apparatus of this embodiment, and the adjustment of the position of the detection device is completely performed manually, so that it is especially suitable for a detection environment in which the electric devices are not suitable for use.

In the accompanying drawings, the same reference numerals denote the same or similar parts or elements throughout multiple drawings unless otherwise specified. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments according to the present disclosure herein and are not to be construed as limiting the scope of the present application.

Only some exemplary embodiments are briefly described below. As can be appreciated by those skilled in the art, the described embodiments can be modified in various ways without departing from the spirit or scope of the present application. Accordingly, the drawings and the description are considered as illustrative in nature, and not as restrictive.

The present disclosure first provides a position adjustment apparatus <NUM> for adjusting a position of a detection device. The position adjustment apparatus <NUM> will be described in detail with reference to <FIG>.

<FIG> shows a schematic view of the appearance of a position adjustment apparatus <NUM> according to an embodiment of the present disclosure. <FIG> shows a schematic view of a position adjustment apparatus <NUM> with part of a housing removed according to an embodiment of the present disclosure. As shown in <FIG>, the position adjustment apparatus <NUM> generally comprises: two support assemblies, a lifting frame <NUM> and at least one height adjustment assembly <NUM>.

The two support assemblies are respectively arranged on the left and right sides of the lifting frame <NUM> and form a basic structure for supporting the lifting frame <NUM>. Each support assembly comprises at least one support rod. The lifting frame <NUM> is arranged between the two support assemblies, the lifting frame has two ends respectively slidably connected to the support rods of the two support assemblies and is configured to move in a height direction of the support rods, and the lifting frame <NUM> comprises a mounting portion <NUM> for mounting the detection device. As shown in <FIG>, the lifting frame <NUM> and the two support assemblies jointly form an arch structure. The at least one height adjustment assembly <NUM> is arranged on one side of at least one of the two support assemblies and is configured to adjust a lifting height of the lifting frame <NUM> to drive the detection device to move up and down in the mounting portion <NUM>, so as to reach a detection height suitable for the detection device. Each height adjustment assembly <NUM> comprises: a first pulley <NUM> and a second pulley <NUM> arranged in the height direction of the support rods, and a drive belt <NUM>. Rotating shafts of the first pulley <NUM> and the second pulley <NUM> are both fixedly arranged on the support assembly on the corresponding side. The drive belt <NUM> is wound around the first pulley <NUM> and the second pulley <NUM>, the lifting frame <NUM> is fixedly connected to a predetermined position on the drive belt <NUM>, and the drive belt <NUM> is configured to drive the lifting frame <NUM> to move as the first pulley <NUM> and the second pulley <NUM> rotate.

The position adjustment apparatus <NUM> of this embodiment enables free control over the height of the lifting frame <NUM> by providing the support rods and the height adjustment assembly <NUM> comprising a pulley block. A user can adjust the height of the detection device by manually rotating the first pulley <NUM> or the second pulley <NUM>, and the operation is simple and convenient. In addition, no electrical devices such as an electric motor are provided inside the position adjustment apparatus <NUM> of this embodiment, and the adjustment of the position of the detection device is completely performed manually, so that it is especially suitable for a detection environment in which the electric devices are not suitable for use.

The support assemblies, the lifting frame <NUM>, and the height adjustment assembly <NUM> will be described in detail below.

<FIG> shows a schematic view of a first support assembly <NUM> of a position adjustment apparatus <NUM> according to an embodiment of the present disclosure. <FIG> shows a schematic view of a second support assembly <NUM> of a position adjustment apparatus <NUM> according to an embodiment of the present disclosure. To better illustrate the two support assemblies described above, part of a housing of each support assembly is removed in <FIG> and <FIG>.

As shown in <FIG>, the first support assembly <NUM> mainly comprises: a first support rod <NUM>, a second support rod <NUM>, and a first housing <NUM>. The first support rod <NUM> and the second support rod <NUM> have the same height and are both vertically arranged. The height of the two support rods may be set according to actual detection requirements. The first housing <NUM> forms a chamber for accommodating the first support rod <NUM> and the second support rod <NUM>. The first housing <NUM> mainly comprises: a first front plate <NUM>, a first back plate <NUM>, a first bottom plate <NUM>, a first top plate <NUM>, and two first side plates <NUM> respectively forming left and right sides of the first support assembly <NUM>, which are fixedly connected to one another (in <FIG>, the first front plate <NUM>, the first top plate <NUM> and the two first side plates <NUM> are removed, and are therefore are shown). The first support rod <NUM> and the second support rod <NUM> are respectively arranged on the left and right sides of the chamber space formed by the first housing <NUM> to give more balanced supporting to the lifting frame <NUM>, and the first support rod <NUM> and the second support rod <NUM> may also be spaced apart by a certain distance to provide a mounting space of the height adjustment assembly <NUM>, which will be described in detail later. In this embodiment, bottom ends of the first support rod <NUM> and the second support rod <NUM> may be fixed to the first bottom plate <NUM> to realize the fixed connection between the two support rods and the first housing <NUM>. In some other embodiments of the present disclosure, the first support rod <NUM> and the second support rod <NUM> may alternatively be fixed to the first back plate <NUM>, the first top plate <NUM>, or the first front plate <NUM>. It will be appreciated that in some other embodiments of the present disclosure, the first support assembly <NUM> may alternatively be provided with more than two support rods, such as three or five support rods. In any case, the solution of the present disclosure is not limited by the number of support rods.

As shown in <FIG>, the second support assembly <NUM> mainly comprises: a third support rod <NUM> and a second housing <NUM>. The third support rod <NUM> has the same height as the first support rod <NUM> and the second support rod <NUM> and is vertically arranged. The second housing <NUM> forms a chamber for accommodating the third support rod <NUM>. The second housing <NUM> mainly comprises: a second front plate, a second back plate <NUM>, a second bottom plate <NUM>, a second top plate, and two second side plates respectively forming left and right sides of the second support assembly <NUM>, which are fixedly connected to one another (in <FIG>, the second front plate, the second top plate and the two second side plates are removed). The third support rod <NUM> may be arranged in the center of the chamber space formed by the second housing <NUM>, to give more balanced supporting to the lifting frame <NUM>. In this embodiment, the third support rod <NUM> may be fixed to the second bottom plate <NUM> to realize the fixed connection between the third support rod <NUM> and the second housing <NUM>. In some other embodiments of the present disclosure, the third support rod <NUM> may alternatively be fixed to the second back plate, the second top plate, or the second front plate. It will be appreciated that in some other embodiments of the present disclosure, the second support assembly <NUM> may also be provided with two or more support rods.

<FIG> shows a side view of one side of a first support assembly <NUM> of a position adjustment apparatus <NUM> according to an embodiment of the present disclosure. As shown in <FIG>, in this embodiment, the position adjustment apparatus <NUM> comprises only one height adjustment assembly <NUM>, and the height adjustment assembly <NUM> is arranged on one side of the first support assembly <NUM>. The height adjustment assembly <NUM> is arranged inside the first housing <NUM> and is arranged between the first support rod <NUM> and the second support rod <NUM>. Preferably, the distances from the height adjustment assembly <NUM> to the first support rod <NUM> and the second support rod <NUM> are the same, such that the height adjustment assembly <NUM> can drive the lifting frame <NUM> to move up and down in a relatively balanced manner, preventing the lifting frame <NUM> from tilting toward one side during movement. Although the position adjustment apparatus <NUM> having only one height adjustment assembly <NUM> is shown in this embodiment, it may be understood that in some other embodiments of the present disclosure, the position adjustment apparatus <NUM> may alternatively comprise two or more height adjustment assemblies <NUM>, and a plurality of height adjustment assemblies <NUM> may be arranged on either or both sides of the first support assembly <NUM> or the second support assembly <NUM>.

Each height adjustment assembly <NUM> comprises: a first pulley <NUM>, a second pulley <NUM> and a drive belt <NUM>. The first pulley <NUM> and the second pulley <NUM> are arranged in the height direction of the support rods. For example, the first pulley <NUM> is arranged at a lower position, and the second pulley <NUM> is arranged above the first pulley <NUM>. In addition, the fixing positions of the first pulley <NUM> and the second pulley <NUM> are required to ensure that the part of the drive belt <NUM> fixedly connected to the lifting frame <NUM> is vertically arranged. As shown in <FIG>, the drive belt <NUM> may comprise a first part <NUM> and a second part <NUM>, wherein the first part <NUM> is vertically arranged and fixedly connected to the lifting frame <NUM>, which will be described in detail below. The rotating shaft of the first pulley <NUM> may be fixed to the first back plate <NUM> by means of a first fixing member <NUM> (not shown due to being hidden), while the rotating shaft of the second pulley <NUM> may be fixed to the first front plate <NUM> by means of a second fixing member <NUM> (in <FIG>, the second fixing member <NUM> seems to be separated from the first front plate <NUM> because the first front plate <NUM> is removed, but in an actual structure, the second fixing member <NUM> is fixedly arranged on the first front plate <NUM>). Therefore, the rotating shafts of the first pulley <NUM> and the second pulley <NUM> are both fixed to the first housing <NUM>, and the relative position between the two pulleys is fixed. The first fixing member <NUM> and the second fixing member <NUM> may both be fixed to the respective positions of the first housing <NUM> by screwing or other means, and the structure and arrangement of such fixing members are well known to those skilled in the art and will not be described in detail herein.

The first pulley <NUM> and a locking mechanism <NUM> for locking the first pulley <NUM> will be described in detail below. <FIG> shows a side view of the first pulley <NUM> and the locking mechanism <NUM> in a height adjustment assembly <NUM> of a position adjustment apparatus <NUM> according to an embodiment of the present disclosure. <FIG> shows a structural exploded view of the first pulley <NUM> and the locking mechanism <NUM> shown in <FIG>. <FIG> shows a schematic view of an outer rotating disk <NUM> of the first pulley <NUM> shown in <FIG>.

As shown in <FIG> and <FIG>, the first pulley <NUM> comprises: an inner wheel <NUM> and an outer rotating disk <NUM> that are coaxial with each other, the inner wheel <NUM> and the outer rotating disk <NUM> may be connected by means of a shaft connecting portion. Specifically, the shaft connecting portion laterally protrudes from a rotating shaft of the inner wheel <NUM>, and has a square end face at the protruding end. A square groove is correspondingly formed at the center of the back side of the outer rotating disk <NUM>, and the inner wheel <NUM> can be coaxially connected to the outer rotating disk <NUM> by inserting the protruding end of the shaft connecting portion into the groove. The inner wheel <NUM> is located on the side close to the first back plate <NUM> relative to the outer rotating disk <NUM>.

The locking mechanism <NUM> comprises: a fixed toothed disk <NUM> and a limiting push piece <NUM>. The fixed toothed disk <NUM> is fixedly arranged on the support assembly on the corresponding side, wherein a hollow portion for accommodating at least a part of the first pulley <NUM> is provided in the center of the fixed toothed disk, and a plurality of limiting teeth <NUM> are arranged on an inside periphery of the hollow portion. Specifically, as shown in <FIG>, the fixed toothed disk <NUM> may be fixed to the first back plate <NUM> of the first housing <NUM> by means of a toothed disk fixing member <NUM>, and the above-described fixed connection may be realized, for example, by screwing. The fixed toothed disk <NUM> comprises a base plate <NUM> and a ring gear <NUM> fixedly arranged on the base plate <NUM>, and the base plate <NUM> and the ring gear <NUM> jointly define the hollow portion. The diameter of the ring gear <NUM> may be greater than that of the outer rotating disk <NUM> such that the outer rotating disk <NUM> can be accommodated within the hollow portion. The base plate <NUM> may be provided with a through hole at the center to allow the inner wheel <NUM> to extend out of the base plate <NUM>. That is, the outer rotating disk <NUM> and the inner wheel <NUM> are respectively arranged on two sides of the base plate <NUM>. The inner wheel <NUM> is located directly below the second pulley <NUM>, and the drive belt <NUM> is wound around the inner wheel <NUM> and the second pulley <NUM>. The limiting push piece <NUM> is slidably arranged on the first pulley <NUM> and configured to slide in a radial direction of the first pulley <NUM>, and the end of the limiting push piece <NUM> facing the inside periphery of the hollow portion is further provided with complementary teeth <NUM> that are complementary with the plurality of limiting teeth <NUM>. Specifically, as shown in <FIG>, the limiting push piece <NUM> is arranged on the outer rotating disk <NUM>. <FIG> shows the side of the outer rotating disk <NUM> facing the fixed toothed disk <NUM>, this side of the outer rotating disk <NUM> is provided with a guide groove <NUM> for accommodating the limiting push piece <NUM>, and the guide groove <NUM> extends in the radial direction of the outer rotating disk <NUM> and allows the limiting push piece <NUM> to slide in the radial direction of the outer rotating disk <NUM>.

A plurality of limiting protrusions <NUM> and limiting recesses cooperating with each other are provided at corresponding positions of two side edges of the limiting push piece <NUM> and an inner side of the guide groove <NUM>, and the limiting push piece <NUM> has a first position and a second position that are defined jointly by the limiting protrusions <NUM> and the limiting recesses. For example, four limiting protrusions <NUM> are arranged on the two side edges of the limiting push piece <NUM>, and two sets of limiting recesses each including four limiting recesses are arranged on the inner side of the guide groove <NUM>. The two sets of limiting recesses comprise: a first set of limiting recesses <NUM> and a second set of limiting recesses <NUM>. When the limiting push piece <NUM> is pushed outwardly in the radial direction of the outer rotating disk <NUM>, the four limiting protrusions <NUM> thereof are engaged with the first set of limiting recesses <NUM>, and the limiting push piece <NUM> is in the first position. When the limiting push piece <NUM> is pushed inwardly in the radial direction of the outer rotating disk <NUM>, the four limiting protrusions <NUM> thereof are engaged with the second set of limiting recesses <NUM>, and the limiting push piece <NUM> is in the second position. The locking mechanism <NUM> is configured such that when the limiting push piece <NUM> is pushed into the first position, the complementary teeth <NUM> are meshed with at least some of the plurality of limiting teeth <NUM> to lock the first pulley <NUM>. When the limiting push piece <NUM> is pushed into the second position, the complementary teeth <NUM> are separated from the plurality of limiting teeth <NUM> to release the first pulley <NUM>. The limiting push piece <NUM> is further provided with a shank <NUM>, the shank <NUM> extends out through a hole pre-formed in the outer rotating disk <NUM> to facilitate pushing of the limiting push piece <NUM> by the user.

As shown in <FIG>, the part of the first housing <NUM> corresponding to the outer rotating disk <NUM> is provided with an opening for exposing at least a part of the outer rotating disk <NUM> outside the housing. Specifically, the first front plate <NUM> of the first housing <NUM> is provided with a circular opening sized to match the outer rotating disk <NUM>, the circular opening allows the side of the outer rotating disk <NUM> facing away from the fixed toothed disk <NUM> to be exposed, so as to facilitate performing turning operation on the outer rotating disk by the user. In addition, the outer rotating disk <NUM> further comprises: a handle <NUM> arranged on the part of the outer rotating disk <NUM> exposed outside the housing to facilitate rotating the outer rotating disk <NUM> by the user. In addition, the shank <NUM> is also arranged on the part of the outer rotating disk <NUM> exposed outside the housing to facilitate the operation by the user.

The use principle of the position adjustment apparatus <NUM> of this embodiment is as follows: when the user desires to adjust the detection height of the detection device, the outer rotating disk <NUM> may be manually rotated from the outer side, the limiting push piece <NUM> is now in the second position, and the outer rotating disk <NUM> can freely rotate. When the outer rotating disk <NUM> is rotated clockwise, the pulley block will drive the first part <NUM> of the drive belt <NUM> to move upwards, thereby driving the lifting frame <NUM> to ascend by means of an engagement portion <NUM>, and increasing the height of the detection device. When the outer rotating disk <NUM> is rotated counterclockwise, the pulley block will drive the first part <NUM> of the drive belt <NUM> to move downwards, thereby driving the lifting frame <NUM> to descend by means of the engagement portion <NUM>, and decreasing the height of the detection device. When the detection device is adjusted to a desired height, the limiting push piece <NUM> is pushed into the first position, and the complementary teeth <NUM> are meshed with at least some of the plurality of limiting teeth <NUM>, the rotation of the first pulley <NUM> is now locked, and the position and height of the detection device is fixed at the same time. In addition, since the limiting teeth <NUM> are arranged on the inside periphery of the hollow portion of the fixed toothed disk <NUM>, regardless of what angle the limiting push piece <NUM> is rotated, when the limiting push piece <NUM> is pushed into the first position, the complementary teeth <NUM> thereof can be meshed with the corresponding some of the limiting teeth <NUM>, thereby achieving the purpose of locking.

The position adjustment apparatus <NUM> of this embodiment can realize height adjustment and positioning of the detection device by means of the cooperation between the pulley block and the locking mechanism <NUM>. The limiting push piece <NUM> for locking purpose is arranged on the outer rotating disk <NUM>, so that the user can conveniently and quickly lock the first pulley <NUM> after rotating the outer rotating disk <NUM>, greatly improving the practicality of the position adjustment apparatus <NUM>. In addition, the provision of the structure in which the outer rotating disk <NUM> is exposed from the first front plate <NUM> enables the user to control the height of the detection device from the side of the position adjustment apparatus <NUM> without the need for inserting a hand into the housing of the position adjustment apparatus <NUM> or between the two support assemblies, thereby further simplifying the operation.

<FIG> shows a schematic view of a lifting frame <NUM> according to an embodiment of the present disclosure. As shown in <FIG>, the lifting frame <NUM> mainly comprises: a first end plate <NUM>, a second end plate <NUM>, a first cross beam <NUM>, a second cross beam <NUM>, a first sliding rod <NUM>, a second sliding rod <NUM>, and a mounting portion <NUM>. The first end plate <NUM> is slidably connected to the support rods of the first support assembly <NUM>, namely, the first support rod <NUM> and the second support rod <NUM>. The second end plate <NUM> is slidably connected to the support rod of the second support assembly <NUM>, namely, the third support rod <NUM>. Two ends of each cross beam are respectively connected to the first end plate <NUM> and the second end plate <NUM>. The first end plate <NUM> is fixedly provided with two sets of sleeves at the positions corresponding to the two support rods, and the sleeves of each set are respectively fitted outside the corresponding support rods. In this embodiment, the two sets of sleeves are respectively arranged in the regions of the first end plate <NUM> close to the left and right side edges thereof so as to respectively correspond to the positions of the first support rod <NUM> and the second support rod <NUM>, and each set of sleeves comprises two sleeves <NUM> arranged in the height direction of the support rods. The second end plate <NUM> is fixedly provided with a set of sleeves at the position corresponding to the support rod, and the sleeves are fitted outside the support rod. In this embodiment, the set of sleeves is arranged in the center of the second end plate <NUM> to correspond to the position of the third support rod <NUM>. In addition, a damping layer is further provided between the sleeve <NUM> and the corresponding support rod. The damping layer may be fixedly arranged on an inner wall of the sleeve <NUM>, and the damping layer may be made of a material with a high coefficient of friction, such as rubber and foam plastic. The first end plate <NUM> is further provided with the engagement portion <NUM> for fixedly connecting the drive belt <NUM>, and the engagement portion <NUM> may be a bump fixed to the first end plate <NUM>. The engagement portion <NUM> is provided with a slit allowing the drive belt <NUM> to pass through, and the engagement portion <NUM> is fixed to a predetermined position of the drive belt <NUM> by means of a screw transversing the slit.

In this embodiment, it is possible to freely move the lifting frame <NUM> in the height direction of the support rod by means of the mutual cooperation of the sleeve <NUM> and the support rod. The damping layer generates a resistance to the relative movement between the sleeve <NUM> and the support rod, allowing the relative movement therebetween to be smoother. Although the relative sliding between the support rods and the lifting frame <NUM> is realized by means of the sleeves <NUM> in this embodiment, it will be appreciated that in some other embodiments of the present disclosure, the sliding connection between the lifting frame <NUM> and the support rods may alternatively be realized by other means. For example, the first end plate <NUM> and the second end plate <NUM> may be provided with recessed sliding tracks, and the relative sliding between the support rods and the lifting frame <NUM> is realized by placing the support rods in the sliding tracks.

At least a part of an upper surface of the cross beam is arranged tilted downwards in a direction from the first end plate <NUM> to the second end plate <NUM>. Since the height adjustment assembly <NUM> is arranged on the first support assembly <NUM> side (hereinafter referred to as first side) in this embodiment, the first side is a side where a force is actively applied, and the second support assembly <NUM> side (hereinafter referred to as second side) is a side that is passively stressed. The inventors have found after a number of experiments that, in the case where the upper surface of the cross beam is made completely horizontal, the lifting speed of the part of the cross beam close to the first side is slightly higher than that of the part close to the second side, and the overall movement of the lifting frame <NUM> may thus be imbalanced. In order to solve the above-mentioned problem, the inventors have consciously configured the upper surface of the cross beam in the form of a structure tilted downwards in the direction from the first end plate <NUM> to the second end plate <NUM>, thereby balancing the lifting speeds of two ends of the cross beam, and in turn ensuring that the lifting frame <NUM> moves more smoothly.

Specifically, as shown in <FIG>, taking the first cross beam <NUM> as an example, the first cross beam <NUM> has a three-section structure, comprising: a first connecting section <NUM>, a second connecting section <NUM> and a transversely extending section <NUM>. One end of the first connecting section <NUM> is connected to the first end plate <NUM>, one end of the second connecting section <NUM> is connected to the second end plate <NUM>, and two ends of the transversely extending section <NUM> are respectively connected to the first connecting section <NUM> and the second connecting section <NUM>. An upper surface of the first connecting section <NUM> extends obliquely upwards from the first end plate <NUM>, an upper surface of the transversely extending section <NUM> extends obliquely downwards from an end of the first connecting section <NUM>, an upper surface of the second connecting section <NUM> extends obliquely downwards from an end of the transversely extending section <NUM>, and the degree of tilting of the upper surface of the second connecting section <NUM> is greater than that of the upper surface of the transversely extending section <NUM>. Such an arrangement allows the upper surface of the first cross beam <NUM> to have a highest point.

The lifting frame <NUM> further comprises: at least one structural reinforcing rope <NUM>. Two ends of each structural reinforcing rope <NUM> are respectively connected to two ends of one cross beam. As shown in <FIG>, the upper surface of the cross beam is further provided with a wire guide groove <NUM> for accommodating the structural reinforcing rope <NUM>. <FIG> shows a top view of a position adjustment apparatus <NUM> according to an embodiment of the present disclosure. In <FIG>, part of the housing at the top of the position adjustment apparatus <NUM> is removed for a clear view of the internal structure thereof. The wire guide groove <NUM> can be more clearly seen from <FIG>. Specifically, the two ends of the structural reinforcing rope <NUM> are respectively fixedly connected to the first connecting section <NUM> and the second connecting section <NUM>, and the first connecting section <NUM> and the second connecting section <NUM> are provided with fixing holes for respectively fixing the two ends of the structural reinforcing rope <NUM>. A fastening screw is provided in each fixing hole, and one end of the structural reinforcing rope <NUM> may be wound around the fastening screw to realize the connection with the first connecting section <NUM> or the second connecting section <NUM>. The structural reinforcing rope <NUM> of this embodiment may be a nonmetallic rope such as a nylon rope and a plastic rope.

The structural reinforcing rope <NUM> of this embodiment enhances the overall structural stability of the lifting frame <NUM>. In addition, the structural reinforcing rope <NUM> connects the two ends of the cross beam and also passes the highest point of the upper surface of the cross beam, and the above-mentioned arrangement forms a suspension bridge-like structure. Such a structure enables the two ends of the cross beam to be uniformly stressed, thereby making the movement speeds at the two ends of the cross beam the same, and ensuring a more stable movement of the lifting frame <NUM>.

The lifting frame <NUM> further comprises: at least two sliding rods arranged in parallel. Two ends of each sliding rod are respectively directly or indirectly connected to the first end plate <NUM> and the second end plate <NUM>. The mounting portion <NUM> further comprises a plurality of sleeves <NUM>. The plurality of sleeves <NUM> are fitted on the at least two sliding rods such that the mounting portion <NUM> slides along the sliding rods. Specifically, as shown in <FIG> and <FIG>, the lifting frame <NUM> comprises the first sliding rod <NUM> and the second sliding rod <NUM>, the first sliding rod <NUM> is arranged directly below the first cross beam <NUM>, and the second sliding rod <NUM> is arranged directly below the second cross beam <NUM>. Taking the first sliding rod <NUM> as an example, two ends of the first sliding rod <NUM> are respectively fixed to the first connecting section <NUM> and the second connecting section <NUM>. That is to say, the first sliding rod <NUM> is indirectly connected to the first end plate <NUM> and the second end plate <NUM> respectively by means of the first connecting section <NUM> and the second connecting section <NUM>. The mounting portion <NUM> may be a rectangular box and is arranged between the two sliding rods, and the side of the mounting portion facing the first sliding rod <NUM> and the side thereof facing the second sliding rod <NUM> are both provided with two sleeves <NUM> for fitting on the corresponding sliding rods. The mounting portion <NUM> further comprises an armrest <NUM> to facilitate pushing the mounting portion <NUM> to slide. As shown in <FIG>, the armrest <NUM> may be arranged between the two sleeves <NUM>. A damping layer may also be provided between the sleeve <NUM> and the sliding rod to make the relative movement between the sleeve <NUM> and the sliding rod more stable.

In the position adjustment apparatus <NUM> of this embodiment, the mounting portion <NUM> thereof may slide in the length direction of the sliding rods, so that the transverse position of the detection device can be adjusted, and in combination with the application of the height adjustment assembly <NUM>, two-dimensional adjustment of the position of the detection device can be further realized.

The detection device may be a device specially used for detecting a magnetic field of the human body. The detection device comprises a plurality of magnetometer probes, which are means for detecting magnetic fields. The mounting portion <NUM> further comprises a mounting panel <NUM>, and the mounting panel <NUM> is provided with a plurality of slotted holes for having the plurality of magnetometer probes <NUM> placed therein. As shown in <FIG>, the mounting panel <NUM> is placed flat at the bottom of the mounting portion <NUM>. The mounting panel <NUM> is provided with a plurality of slotted holes <NUM>, and the slotted holes <NUM> may be arranged in an M × N array. After the plurality of magnetometer probes are respectively placed in the slotted holes <NUM>, an M × N array of detection probes is formed, which can be used for detecting a magnetic field of a target at multiple points.

The position adjustment apparatus <NUM> is integrally made of a nonmetallic material. The above-mentioned nonmetallic material may be a high-molecular polymer such as a resin, or a ceramic material. As described above, the position adjustment apparatus <NUM> of this embodiment may be specially used for the adjustment of the position of the detection device for detecting a magnetic field. Therefore, each of the components (including a screw for connection, etc.) of the position adjustment apparatus <NUM> is preferably made of the nonmetallic material, thereby preventing metal components in the position adjustment apparatus <NUM> from generating a magnetic field to interfere with the detection of the detection device. In addition, the position adjustment apparatus <NUM> is further integrally provided with a housing forming the appearance thereof, and the housing may comprise the first housing <NUM> and the second housing <NUM>. The specific structure of the housing is a conventional arrangement in the art, which will not be described in detail herein.

According to another aspect of the present disclosure, further provided is a magnetocardiography instrument <NUM>. The magnetocardiography instrument <NUM> is a completely non-invasive and high-sensitivity medical instrument with a magnetic field detection device placed over the heart to passively receive magnetic field signals generated by the electrophysiological activity of the heart. The magnetocardiography instrument <NUM> does not generate radioactive rays, does not form an external magnetic field, and does not use a developer, and the detection device does not come into contact with a patient. The magnetocardiography instrument <NUM> is typically placed in a separate room of <NUM>-<NUM> square meters and it is necessary to ensure that there is no strong magnetic field interference beyond <NUM> meters. The person to be detected does not need to make any preparation, and only needs to lie supine on the magnetocardiography instrument <NUM> for <NUM>-<NUM> minutes during scanning. The detection personnel can independently complete the detection process in a short time, and a detection result will be automatically recorded in a corresponding storage device. A magnetocardiogram generated by the magnetocardiography instrument <NUM> may be used for diagnosing whether the patient is suffering from problems such as myocardial ischemia, microangiopathy or ventricular hypertrophy. The magnetocardiography instrument <NUM> has a very high sensitivity and can accurately detect the traces of myocardial cell apoptosis or necrosis caused by previous myocardial ischemia.

The magnetocardiography instrument <NUM> comprises: a bed body <NUM>, the position adjustment apparatus <NUM> and a plurality of magnetometer probes. <FIG> shows a schematic view of a magnetocardiography instrument <NUM> according to an embodiment of the present disclosure. As shown in <FIG>, the bed body <NUM> is substantially of a rectangular plate-like structure, and the person to be detected may lie on the bed body <NUM> to wait for examination. The bottom ends of the two support assemblies of the position adjustment apparatus <NUM> are respectively slidably connected to two side edges in a length direction of the bed body <NUM> such that the position adjustment apparatus <NUM> slides in the length direction of the bed body <NUM>. The mounting of the plurality of magnetometer probes is described in detail above and will not be further described herein. Since the positions of the hearts of different individuals to be detected are different, the magnetocardiography instrument <NUM> needs to use the position adjustment apparatus <NUM> to adjust the position of the detection device so as to find an optimal position for detecting the magnetic field of the human heart.

<FIG> shows a partially enlarged view of an area A in <FIG>. As shown in <FIG>, the bottom ends of the two support assemblies are further provided with a plurality of rollers <NUM>. The bed body <NUM> is further provided with tracks <NUM> at the positions corresponding to the bottom ends of the two support assemblies, the tracks extending in the length direction of the bed body <NUM> for accommodating the plurality of rollers <NUM>. The tracks <NUM> may be arranged on the left and right sides of the bed body <NUM>. The plurality of rollers <NUM> are arranged on the sides of the bottom ends of the support assemblies facing the bed body <NUM> so as to be opposite the tracks <NUM>. As shown in <FIG> and <FIG>, the width of the position adjustment apparatus <NUM> (the distance between the first support assembly <NUM> and the second support assembly <NUM>) is slightly greater than that of the bed body <NUM>, and the bottom ends of the two support assemblies are not directly above the two side edges of the bed body <NUM>, but slightly beyond the width extent of the bed body <NUM> on two sides. The rollers <NUM> may be arranged on the inner sides of the bottom ends of the support assemblies, and correspondingly, the tracks <NUM> are arranged on the left and right sides of the bed body <NUM>. Such an arrangement allows the rollers <NUM> and the tracks <NUM> not to occupy the upper surface of the bed body <NUM> and prevents same from coming into contact with the person to be detected during movement of the position adjustment apparatus <NUM>. Since the detection device only detects the magnetic field around the heart of the human body, it is not necessary for the length of the tracks <NUM> to be equal to the length of the bed body <NUM>. For example, the length of the tracks <NUM> may be only half of the length of the bed body <NUM>.

The bed body <NUM> is further provided with a rack <NUM> extending in the length direction thereof, and the position adjustment apparatus <NUM> further comprises a limiting mechanism <NUM>. The limiting mechanism <NUM> comprises: a cam-knob <NUM> and a limiting member <NUM>. <FIG> shows an exploded view of a limiting mechanism <NUM> of a magnetocardiography instrument <NUM> according to an embodiment of the present disclosure. As shown in <FIG> and <FIG>, in order to save space, the rack <NUM> may be arranged on an upper surface of the track <NUM>. The cam-knob <NUM> is rotatably arranged on the support assembly on the corresponding side, and comprises a cam portion <NUM> and a knob portion <NUM> that are coaxially connected to each other. Specifically, the limiting mechanism <NUM> may be mounted on one side of the first support assembly <NUM>, the cam portion <NUM> of the cam-knob <NUM> and at least a part of the limiting member <NUM> may be accommodated within the first housing <NUM>, and the knob portion <NUM> of the cam-knob <NUM> is arranged outside the first housing <NUM>. The cam-knob <NUM> may be mounted to the first back plate <NUM> of the first housing <NUM> by means of a cam mounting member <NUM> such that the cam-knob <NUM> is fixed in position relative to the first back plate <NUM>. The limiting member <NUM> is provided with a cam hole <NUM> for engagement with the cam portion <NUM>, and the cam hole <NUM> and the cam portion <NUM> each have a specific shape such that when the knob portion <NUM> is rotated, the limiting member <NUM> can move up and down with the rotation of the cam portion <NUM>. One end of the limiting member <NUM> extends downwards and faces the rack <NUM>, and is further provided with a plurality of snap teeth <NUM> cooperating with the rack <NUM>. Specifically, as shown in <FIG>, the limiting member <NUM> comprises a first section <NUM> extending downwards and a second section <NUM> extending toward the bed body <NUM>, the first section <NUM> may extend to the bottom of the first back plate <NUM>, and the second section <NUM> extends out of the first housing <NUM>, with an end thereof extending into the track <NUM>. The end of the second section <NUM> is located directly below the rack <NUM> and is spaced apart from the rack <NUM> by a certain distance. An upper surface of the end of the second section <NUM> is provided with a plurality of snap teeth <NUM>, and the snap teeth <NUM> are shaped to match the plurality of teeth on the rack <NUM>.

The limiting mechanism <NUM> is configured to control the meshing or separation of the snap teeth <NUM> and the rack <NUM> by causing the cam portion <NUM> to drive the limiting member <NUM> to move up and down by means of the knob portion <NUM>. The working principle of the limiting mechanism <NUM> of this embodiment is as follows: after the detection personnel adjusts the position of the position adjustment apparatus <NUM> in the length direction of the bed body <NUM>, the position adjustment apparatus <NUM> is fixed to the desired position by operating the limiting mechanism <NUM>, and then another two spatial dimensions of the detection device are adjusted by operating the outer rotating disk <NUM> and the armrest <NUM>.

The magnetocardiography instrument <NUM> of this embodiment has the above-mentioned position adjustment apparatus <NUM>, and in combination with the tracks <NUM>, the rollers <NUM> and the limiting mechanism <NUM>, the position of the detection device can be adjusted in three dimensional directions, namely the length direction, the width direction and the height direction, of the bed body <NUM>. Therefore, the magnetocardiography instrument <NUM> of this embodiment can more accurately position the detection device to the optimal position required for measuring the magnetic field of the human body, and fix the detection device without affecting the high-sensitivity detection of the magnetic field, thereby greatly improving the practicality and operability of the magnetocardiography instrument <NUM>.

<FIG> shows a schematic view of the appearance of a magnetocardiography instrument <NUM> according to an embodiment of the present disclosure. The magnetocardiography instrument <NUM> may further comprise a magnetic shielding cabin <NUM>, a base <NUM>, and an electric motor <NUM>. The bed body <NUM> is arranged on the base <NUM>, and the bed body <NUM> may be controlled by means of the electric motor <NUM> to slide in a length direction of the base <NUM> so as to drive the person to be detected to enter or leave the magnetic shielding cabin <NUM>. When the magnetocardiography instrument <NUM> is in a non-working state, the position adjustment apparatus <NUM> may be located outside the magnetic shielding cabin <NUM>. During use of the magnetocardiography instrument <NUM>, the bed body <NUM> slides toward the inside of the magnetic shielding cabin <NUM> and reaches a predetermined position such that the position adjustment apparatus <NUM> is located inside the magnetic shielding cabin <NUM>. In other words, the magnetic shielding cabin <NUM> covers the position adjustment apparatus <NUM> to prevent the detection process from being interfered by an external magnetic field. The electric motor <NUM> may preferably be arranged at the end of the base <NUM> remote from the magnetic shielding cabin <NUM> to prevent interference with the detection device.

The magnetic shielding cabin <NUM> is a magnetic shielding cylinder made of multiple layers of magnetic shielding materials. An outermost layer is made of an aluminum alloy for shielding high-frequency electromagnetic interference in the environment. The middle is a magnetic shielding cylinder made of multiple layers of high-permeability magnetic materials, for shielding low-frequency electromagnetic interference in the environment. An innermost layer and the portions between the different layers are nonmagnetic materials such as resin, plastic or nylon for providing support. The magnetic shielding cabin <NUM> is closed at one end and open at the other end to facilitate the entry and exit of the person to be tested. The magnetic shielding cabin <NUM> can further reduce interference of the external magnetic field to provide a good detection environment for the detection device. A demagnetizing coil may also be provided inside the magnetic shielding cabin <NUM>, and the inside of the magnetic shielding cabin <NUM> is periodically demagnetized by using a degausser.

The magnetocardiography instrument <NUM> may further comprise: a magnetic compensation system. The magnetic compensation system is composed of a magnetic compensation coil and a high-precision current source, a noise signal of the ambient environment that is measured by the detection device is used as a reference signal, and the high-precision current source is used to apply a current to the magnetic compensation coil, so as to provide a magnetic field with an equivalent magnitude as an ambient interfering magnetic field and an opposite direction thereto for counteraction, thereby making the magnetic field in the magnetic shielding cabin <NUM> closer to zero. An air supply system and a non-magnetic light guide bar may also be provided inside the magnetic shielding cabin <NUM> to reduce the anxiety of the tested person in a semi-enclosed space and to improve the comfort of the tested person during measurement.

The magnetocardiography instrument <NUM> may further comprise a processing device and a storage device. The processing device is communicatively connected to the detection device to receive data detected by the detection device and generates a magnetocardiogram on the basis of the data. The storage device is connected to the processing device and used for storing the generated magnetocardiogram. The processing device may be various general-purpose and/or special-purpose processing components with processing and computing capabilities. Some examples of the processing device include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units that run machine learning model algorithms, a digital signal processor (DSP), and any appropriate processor, controller, microcontroller, etc. The storage device may include, but is not limited to, a magnetic disk and an optical disk.

The working principle of the magnetocardiography instrument <NUM> is as follows: when the person to be detected is lying on the bed body, the position adjustment apparatus <NUM> and the tracks <NUM> are first operated such that the detection device is located at an optimal detection point directly above the heart of the human body. The person to be detected is then carried into the magnetic shielding cabin <NUM>, the detection device is started, the data of magnetic field signals of the heart undergoes centralized collection, and the processing device uses relevant image generation software to generate a one-dimensional magnetocardiogram, a two-dimensional magnetocardiogram and a three-dimensional magnetocardiogram, thereby generating a magnetocardiography measurement report. Reading and discrimination may also be performed subsequently, and a diagnosis report may be generated.

It should be understood that, in this description, the orientations or positional relationships or dimensions denoted by the terms, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial" and "circumferential", are the orientations or positional relationships or dimensions shown on the basis of the drawings, and these terms are used merely for ease of description, rather than indicating or implying that the device or element referred to must have particular orientations and be constructed and operated in the particular orientations, and therefore should not be construed as limiting the scope of protection of the present application.

In addition, the terms "first", "second" and "third" are merely for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined with "first", "second" and "third" may explicitly or implicitly comprise one or more features. In the description of the present application, the term "plurality of' means two or more, unless specifically and specifically limited otherwise.

In the present application, unless expressly stated or limited otherwise, the terms such as "mounting", "connection", "connected" and "fixing" should be interpreted broadly, for example, either fixed or detachable connection, or integration; which may be mechanical connection, or electrical connection, or communication; and which may be direct connection or indirect connection by means of an intermediate medium, and may be communication between the interiors of two elements or the interaction relationship of the two elements. For those of ordinary skills in the art, the specific meaning of the terms mentioned above in the present application may be construed according to specific circumstances.

In the present application, unless expressly stated or limited otherwise, the expression of the first feature being "above" or "below" the second feature may include the case that the first feature is in direct contact with the second feature, and may also include the case that the first and second features are not in direct contact but are contacted via another feature therebetween. Furthermore, the first feature being "over", "above" or "on" the second feature includes the case that the first feature is directly or obliquely above the second feature, or merely indicates that the first feature is at a higher level than the second feature. The first feature being "below", "under" or "beneath" the second feature includes the case that the first feature is directly or obliquely below the second feature, or merely indicates that the first feature is at a smaller level than the second feature.

Claim 1:
A position adjustment apparatus (<NUM>) for adjusting a position of a detection device, the position adjustment apparatus (<NUM>) comprising:
two support assemblies (<NUM>,<NUM>), each of the support assemblies (<NUM>,<NUM>) comprising at least one support rod;
a lifting frame (<NUM>) arranged between the two support assemblies (<NUM>,<NUM>), the lifting frame (<NUM>) having two ends respectively slidably connected to the support rods (<NUM>,<NUM>,<NUM>) of the two support assemblies (<NUM>,<NUM>) and being configured to move in a height direction of the support rods (<NUM>,<NUM>,<NUM>), the lifting frame (<NUM>) comprising a mounting portion (<NUM>) for mounting the detection device; and
at least one height adjustment assembly (<NUM>) arranged on at least one side of the lifting frame (<NUM>) where one of the two support assemblies (<NUM>,<NUM>) is located and configured to adjust a lifting height of the lifting frame (<NUM>), each height adjustment assembly (<NUM>) of the at least one height adjustment assembly (<NUM>) comprising
a first pulley (<NUM>) and a second pulley (<NUM>) arranged in a height direction of the at least one support rod (<NUM>,<NUM>,<NUM>), and rotating shafts of the first pulley (<NUM>) and the second pulley (<NUM>) being both fixedly mounted on a support assembly arranged on the corresponding side of the lifting frame (<NUM>); and
a drive belt (<NUM>) wound around the first pulley (<NUM>) and the second pulley (<NUM>), the lifting frame (<NUM>) being fixedly connected to a predetermined position on the drive belt (<NUM>), the drive belt (<NUM>) being configured to drive the lifting frame (<NUM>) to move as the first pulley (<NUM>) and the second pulley (<NUM>) rotate.