CN110568503B

CN110568503B - Metal object shielding and isolating device for nuclear magnetic resonance

Info

Publication number: CN110568503B
Application number: CN201910867701.8A
Authority: CN
Inventors: 信瑞; 曲丹华; 袁庆海; 孙海峰; 宫心扣
Original assignee: Jilin University
Current assignee: Jilin University
Priority date: 2019-09-14
Filing date: 2019-09-14
Publication date: 2021-01-05
Anticipated expiration: 2039-09-14
Also published as: CN110568503A

Abstract

The invention relates to the technical field of nuclear magnetic resonance, and discloses a metal object shielding and isolating device for nuclear magnetic resonance, which comprises a detection plate, wherein a pressing plate is movably lapped on the inner wall of the detection plate, a screw rod is movably mounted on the lower surface of the pressing plate, a threaded column is movably mounted at the lower end of the screw rod, the lower end of the screw rod penetrates through and extends to the lower end of the threaded column and is fixedly mounted with a tooth column, a fixed cylinder is fixedly mounted on the outer surface of the threaded column through a supporting rod, a tooth column is fixedly mounted at the lower end of the threaded column, a driven gear is meshed at the tooth position of the tooth column, and a movable gear is fixedly mounted. Through the cooperation use of loose gear, stationary blade and branch strip, can effectual drive probe plate the rotation about, whether carry the metal product around convenient omnidirectional detection patient is on one's body, possess the detection that realizes all-round no dead angle, effectively avoid falling the advantage of the hourglass condition of examining.

Description

Metal object shielding and isolating device for nuclear magnetic resonance

Technical Field

The invention relates to the technical field of nuclear magnetic resonance, in particular to a metal object shielding and isolating device for nuclear magnetic resonance.

Background

The basic principle of nuclear magnetic resonance is that a human body is placed in a special magnetic field, a radio frequency pulse is used for exciting hydrogen nuclei in the human body to cause the hydrogen nuclei to resonate and absorb energy, after the radio frequency pulse is stopped, the hydrogen nuclei send out radio signals according to specific frequency and release the absorbed energy, the signals are recorded by a receiver outside the human body, and an image is obtained through processing of an electronic computer, so that the nuclear magnetic resonance imaging is called.

Because nuclear magnetic resonance can generate a huge magnetic field, before nuclear magnetic resonance detection, metal and other objects need to be removed, so that after metal is mistakenly brought into the nuclear magnetic resonance detection, the metal objects are sucked away during the nuclear magnetic resonance so as to cause the nuclear magnetic resonance machine not to work, and meanwhile, metal materials can interfere with magnetic resonance signals to cause unclear photography and influence diagnosis results. When medical staff holds the detector to scan back and forth, scanning dead angles may exist, so that metal objects are not detected, and when the medical staff holds the detector for a long time to detect, manpower is wasted, and the detector is not suitable for long-time use.

In order to solve the above problems, the inventors have proposed a metal object shielding and isolating device for nuclear magnetic resonance, which can detect whether a patient has metal in all directions, and which does not cause a detection result error due to a missing detection, and which also frees up the labor of medical staff.

Disclosure of Invention

The invention adopts the following technical scheme for realizing the technical purpose: a shielding and isolating device for a metal object for nuclear magnetic resonance comprises: the detection plate, the inner wall movable overlap joint of detection plate has the clamp plate, and the lower surface movable mounting of clamp plate has the hob, and the lower extreme movable mounting of hob has the screw thread post, and the lower extreme fixed mounting that the lower extreme of hob runs through and extends to the screw thread post has the tooth post, the surface of screw thread post has a fixed cylinder through branch fixed mounting, the lower extreme fixed mounting of screw thread post has the tooth post, and the meshing of the tooth department of tooth post has driven gear, and driven gear's lower extreme fixed mounting has loose gear, and loose gear's lower surface movable mounting has the stationary blade, and the lower fixed surface of stationary blade installs the branch strip.

Furthermore, the fixed cylinder is internally provided with teeth matched with the driven gear, and the teeth of the driven gear are meshed with the inner wall of the fixed cylinder, mainly for driving the detection plate to rotate through the rotation of the movable gear.

Furthermore, the movable gear is located below the fixed cylinder, and the distance between the upper surface of the movable gear and the lower end of the fixed cylinder is not less than three millimeters, mainly to avoid the movable gear from directly rotating.

Furthermore, the lower surface movable mounting of tooth post has the pillar, and the lower extreme of pillar runs through and extends to the below and the ground fixed connection of stationary blade, mainly is for giving the fixed cylinder holding power.

Furthermore, the middle part of the fixing piece is provided with a movable hole matched with the support column, and the movable hole is mainly used for ensuring that the support column can rotate at will.

Furthermore, the lower extreme of detecting the board has seted up the spout, and the inside swing joint of spout has the slide bar, and the lower extreme and the ground fixed mounting of slide bar mainly are in order to guarantee that the detecting board can rotate, play the supporting role.

Furthermore, a steel ball is arranged at the joint of the bending part at the lower end of the detection plate and the movable gear, and is mainly used for reducing friction force and facilitating rotation of the detection plate.

The invention has the following beneficial effects:

1. this metal object shielding isolating device for nuclear magnetic resonance uses through the cooperation of loose gear, stationary blade and branch, can effectual drive the rotation about the probe plate, makes things convenient for whether the omnidirectional detects that whether carry metal product around on the patient body, has made things convenient for the detection at all-round no dead angle, has avoided the condition of lou examining.

2. This metal object shielding isolating device for nuclear magnetic resonance uses through the cooperation of hob and screw thread post, can utilize human self gravity, lets the probe plate take place to rotate, does not need the rotation that other external forces drove the probe plate, has practiced thrift the energy.

3. This metal object shielding isolating device for nuclear magnetic resonance uses through the cooperation of tooth post and driven gear, can effectually drive driven gear's rotation, has guaranteed the rotation of loose gear.

4. This metal object shielding isolating device for nuclear magnetic resonance uses through the cooperation of screw thread post, branch and a fixed section of thick bamboo, can effectually fix for the spiral post, avoids the spiral post because of not having the fixed stay, can rotate along with the hob decline.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a schematic front sectional view of the overall structure of the present invention.

Fig. 3 is a schematic bottom view of the fixing cylinder according to the present invention.

Fig. 4 is a schematic top view of the fixing cylinder of the present invention.

Fig. 5 is a bottom sectional view of the fixing cylinder according to the present invention.

In the figure: the device comprises a detection plate 1, a pressing plate 2, a spiral rod 3, a threaded column 4, a supporting rod 5, a toothed column 6, a driven gear 7, a fixed cylinder 8, a movable gear 9, a fixing sheet 10 and a supporting strip 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-5, a shielding and isolating device for a metal object for nmr includes: the inner wall of the detection plate 1 is movably lapped with a pressing plate 2, the lower surface of the pressing plate 2 is movably provided with a screw rod 3, and the lower end of the screw rod 3 is movably provided with a threaded column 4.

Wherein, using through the cooperation of hob 3 with screw thread post 4, can utilizing human self gravity, letting exploration board 1 take place the rotation, do not need other external force to drive the rotation of exploration board 1, practiced thrift the energy.

The lower extreme of hob 3 runs through and extends to the lower extreme fixed mounting of screw post 4 has tooth post 6, the surface of screw post 4 has a solid fixed cylinder 8 through 5 fixed mounting of branch, the tooth with 7 looks adaptations of driven gear is seted up to solid fixed cylinder 8's inside, the tooth department of driven gear 7 and the inner wall meshing of solid fixed cylinder 8, mainly be in order to drive the rotation of detecting plate 1 through the rotation of loose gear 9, the lower extreme fixed mounting of screw post 4 has tooth post 6, the lower surface movable mounting of tooth post 6 has the pillar, the lower extreme of pillar runs through and extends to the below and the ground fixed connection of stationary blade 10, mainly be in order to give solid fixed cylinder 8 holding power.

Wherein, use through the cooperation of screw post 4, branch 5 with solid fixed cylinder 8, can effectually fix for spiral post 4, avoid spiral post 4 because of not having the fixed stay, can rotate along with the decline of hob 3.

The teeth of the tooth column 6 are engaged with a driven gear 7, and the lower end of the driven gear 7 is fixedly provided with a movable gear 9.

Wherein, through the cooperation of tooth post 6 and driven gear 7 use, can effectual drive driven gear 7's rotation, guaranteed the rotation of loose gear 9.

The loose gear 9 is located the below of a fixed section of thick bamboo 8, and the distance is not less than three millimeters between the upper surface of loose gear 9 and the 8 lower extremes of a fixed section of thick bamboo, mainly is in order to avoid the unable direct rotation of loose gear 9, the lower surface movable mounting of loose gear 9 has stationary blade 10, the movable orifice with pillar looks adaptation is seted up at the middle part of stationary blade 10, mainly be in order to guarantee that the pillar can rotate at will, the lower fixed surface of stationary blade 10 installs branch 11.

Wherein, the spout has been seted up to the lower extreme of detecting plate 1, and the inside swing joint of spout has the slide bar, and the lower extreme and the ground fixed mounting of slide bar mainly are in order to guarantee that detecting plate 1 can rotate, play the supporting role.

Wherein, the bending part of the lower end of the detecting plate 1 is provided with a steel ball at the joint with the movable gear 9, which is mainly used for reducing friction force and facilitating the rotation of the detecting plate 1.

Wherein, use through the cooperation of loose gear 10, stationary blade 10 and branch 11, can effectual drive probe plate 1 the rotation about, whether convenient all-round detected patient on one's body carry the metal product all around, made things convenient for the detection at all-round no dead angle, avoided the condition of lou examining.

When using, let the patient stand on clamp plate 2, hob 3 receives gravity to push down, because set up the screw thread with 3 looks adaptations of hob in the screw thread post 4, so hob 3 can take the clockwise rotation of tooth post 6 when along screw thread post 4 downstream, after 6 clockwise rotations of tooth post, can drive loose gear 9 clockwise rotations through driven gear 7, loose gear 9 is when clockwise rotating, driven movable detecting plate 1 clockwise rotation, the patient who centers on clamp plate 2 rotates and detects the round, if there is the metal, detecting plate 1 then can send the sound, do not need the manual detection of people, not only realized all-round no dead angle of detection, and medical staff's labour has been liberated.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A shielding and isolating device for a metal object for nuclear magnetic resonance comprises: detection plate (1), its characterized in that: the inner wall of detecting plate (1) is equipped with clamp plate (2), the lower surface movable mounting of clamp plate (2) has hob (3), the lower extreme movable mounting of hob (3) has screw thread post (4), the lower extreme of hob (3) runs through and extends to the lower extreme fixed mounting of screw thread post (4) has tooth post (6), the surface of screw thread post (4) has a solid fixed cylinder (8) through branch (5) fixed mounting, the lower extreme fixed mounting of screw thread post (4) has tooth post (6), the meshing of tooth department of tooth post (6) has driven gear (7), the lower extreme fixed mounting of driven gear (7) has loose gear (9), the lower surface movable mounting of loose gear (9) has stationary blade (10), the lower fixed mounting of stationary blade (10) has branch strip (11).

2. The shielding and isolating device for a metal object for nuclear magnetic resonance as claimed in claim 1, wherein: teeth matched with the driven gear (7) are formed in the fixed cylinder (8), and the teeth of the driven gear (7) are meshed with the inner wall of the fixed cylinder (8).

3. The shielding and isolating device for a metal object for nuclear magnetic resonance as claimed in claim 1, wherein: the movable gear (9) is positioned below the fixed cylinder (8), and the distance between the upper surface of the movable gear (9) and the lower end of the fixed cylinder (8) is not less than three millimeters.

4. The shielding and isolating device for a metal object for nuclear magnetic resonance as claimed in claim 1, wherein: the lower surface movable mounting of tooth post (6) has the pillar, and the lower extreme of pillar runs through and extends to the below and the ground fixed connection of stationary blade (10).

5. The shielding and isolating device for a metal object for nuclear magnetic resonance as claimed in claim 1, wherein: the middle part of the fixing piece (10) is provided with a movable hole matched with the support.

6. The shielding and isolating device for a metal object for nuclear magnetic resonance as claimed in claim 1, wherein: the lower end of the detection plate (1) is provided with a sliding chute, the inside of the sliding chute is movably connected with a sliding rod, and the lower end of the sliding rod is fixedly installed on the ground.

7. The shielding and isolating device for a metal object for nuclear magnetic resonance as claimed in claim 1, wherein: and a steel ball is arranged at the joint of the bending part at the lower end of the detection plate (1) and the movable gear (9).