A coaxial connector structure for a gradient coil cable

Abstract

The present invention discloses a coaxial joint structure for a gradient coil cable, comprising: a first terminal, a second terminal, and a buckle assembly. The second terminal is sleeved on the radial outer side of the first terminal through a spaced insulating jacket. The first end of the first terminal extends out of the second terminal and is connected to the buckle assembly, and the first end of the second terminal is connected to the buckle assembly. Through the coaxial structure design, the electromagnetic forces received by the terminals for input and output currents in a strong magnetic field environment can cancel each other out, thereby improving the stability of the joint.

Description

Technical Field

[0001] The present invention relates to the field of magnetic resonance technology, and particularly to a coaxial joint structure for a gradient coil cable. Background Art

[0002] In a strong magnetic field environment, when the gradient coil works, adjacent copper bar joints of the cable joint of the existing gradient coil will pass large currents in opposite directions. The current amplitude can reach several hundred amperes, and the current direction will switch frequently and rapidly. The copper bar joints will be affected by a strong electromagnetic force, causing vibration of the copper bar joints and the gradient coil. This will lead to fatigue of the copper bar joints and the gradient coil, especially cracking of the glue in the contact area between the copper bar joints and the gradient coil, thus affecting the reliability of the gradient coil.

[0003] Therefore, how to improve the stability of the cable joint of the gradient coil is a technical problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The object of the present invention is to provide a coaxial joint structure for a gradient coil cable, which can effectively improve the stability of the cable joint.

[0005] To solve the above technical problems, the present invention provides the following technical solutions:

[0006] A coaxial joint structure for a gradient coil cable, comprising: a first terminal, a second terminal, and a buckle assembly. The second terminal is sleeved on the radial outer side of the first terminal through a spaced insulating sleeve. The first end of the first terminal extends out of the second terminal and is connected to the buckle assembly, and the first end of the second terminal is connected to the buckle assembly.

[0007] Preferably, the buckle assembly includes a first buckle and a second buckle. A first card slot is provided on the outer periphery of the first end of the first terminal, and the first buckle is used for snap connection with the first card slot. A second card slot is provided on the outer periphery of the first end of the second terminal, and the second buckle is used for snap connection with the second card slot.

[0008] Preferably, it further includes a limit buckle for isolating the first buckle and the second buckle.

[0009] Preferably, the limit buckle is an I-shaped block, and the first buckle and the second buckle are respectively located in the limit slots on both sides of the I-shaped block.

[0010] Preferably, the first buckle includes a first upper clamping plate and a first lower clamping plate for clamping on the first clamping groove, and the first ends of the first upper clamping plate and the first lower clamping plate are connected by a first fastener; the second buckle includes a second upper clamping plate and a second lower clamping plate for clamping on the second clamping groove, and the first ends of the second upper clamping plate and the second lower clamping plate are connected by a second fastener, and the second ends of the first upper clamping plate and the first lower clamping plate and the second ends of the second upper clamping plate and the second lower clamping plate are connected to the limit buckle.

[0011] Preferably, one end of the first buckle close to the limit buckle is provided with a first connection end, and one end of the second buckle close to the limit buckle is provided with a second connection end.

[0012] Preferably, the first connection end and the second connection end are bent upward.

[0013] Preferably, the second ends of the first terminal and the second terminal are provided with open slots.

[0014] Preferably, an insulating block is arranged in the open slot at the second end of the second terminal, and the second end of the first terminal is connected to the insulating block.

[0015] Compared with the prior art, the above technical solution has the following advantages:

[0016] A coaxial joint structure of a gradient coil cable provided by the present invention includes: a first terminal, a second terminal, and a buckle assembly. The second terminal is sleeved on the radial outer side of the first terminal through a spaced insulating sleeve. The first end of the first terminal extends out of the second terminal and is connected to the buckle assembly, and the first end of the second terminal is connected to the buckle assembly. Through the coaxial structure design, the electromagnetic forces received by the input and output current terminals in a strong magnetic field environment can cancel each other out, thereby improving the stability of the joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a three-dimensional schematic diagram of a coaxial joint structure of a gradient coil cable provided by a specific embodiment of the present invention;

[0019] Figure 2 It is a 3 / 4 sectional view of the coaxial joint structure of the gradient coil cable.

[0020] The reference numerals are described as follows:

[0021] 1 is the first terminal, 2 is the second terminal, 3 is the insulating jacket, 4 is the limit buckle, 5 is the first buckle, 6 is the second buckle, 7 is the insulating block, 8 is the screw, 9 is the washer, and 10 is the nut. Specific embodiments

[0022] In order to make the above objects, features, and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0023] Specific details are set forth in the following description in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0024] Please refer to Figure 1 and Figure 2 , Figure 1 which is a perspective view of a coaxial connector structure of a gradient coil cable provided by a specific embodiment of the present invention; Figure 2 is a 3 / 4 cross-sectional view of the coaxial connector structure of the gradient coil cable.

[0025] A specific embodiment of the present invention provides a coaxial connector structure for a gradient coil cable, including: a first terminal 1, a second terminal 2, and a buckle assembly. The first terminal 1 is preferably a copper terminal, and the second terminal 2 is preferably a copper tube terminal. The first terminal 1 and the second terminal 2 are coaxially arranged. The second terminal 2 is sleeved on the radial outer side of the first terminal 1 through a spaced insulating jacket 3. The insulating jacket 3 is preferably an epoxy insulating sleeve 3. The first end of the first terminal 1 extends out of the second terminal 2 and is connected to the buckle assembly, and the first end of the second terminal 2 is connected to the buckle assembly. Through the coaxial structural design, the electromagnetic forces received by the terminals for input and output currents in a strong magnetic field environment can cancel each other out, eliminating the vibration generated by the action of the electromagnetic force, thereby improving the stability of the connector.

[0026] For the buckle assembly, it specifically includes a first buckle 5 and a second buckle 6. A first card slot is provided on the outer periphery of the first end of the first terminal 1, and the first buckle 5 is snap-connected to the first card slot. A second card slot is provided on the outer periphery of the first end of the second terminal 2, and the second buckle 6 is snap-connected to the second card slot. The first card slot and the second card slot are preferably circular ring grooves, and the first terminal 1 and the second terminal 2 can be axially limited through the first card slot and the second card slot.

[0027] Further, it also includes a limit buckle 4. The two ends of the limit buckle 4 are respectively connected to the first buckle 5 and the second buckle 6 to isolate the first buckle 5 and the second buckle 6, thereby preventing the first buckle 5 and the second buckle 6 from contacting each other and causing a short circuit, and also preventing the first buckle 5 and the second buckle 6 from rotating in opposite directions along the axial direction of the terminal post. Both the first buckle 5 and the second buckle 6 are preferably copper buckles.

[0028] Specifically, the limit buckle 4 is an I-shaped block. As Figure 1 shown, the first buckle 5 and the second buckle 6 are respectively located in the limit grooves on both sides of the I-shaped block, and the limit grooves can also fix the first buckle 5 and the second buckle 6.

[0029] Among them, the first buckle 5 includes a first upper clamping plate and a first lower clamping plate for clamping on the first clamping groove. There are two semi-circular arc tile-shaped structures between the first upper clamping plate and the first lower clamping plate. The first ends of the first upper clamping plate and the first lower clamping plate are connected by a first fastener; the second buckle 6 includes a second upper clamping plate and a second lower clamping plate for clamping on the second clamping groove. There are also two semi-circular arc tile-shaped structures between the second upper clamping plate and the second lower clamping plate. The first ends of the second upper clamping plate and the second lower clamping plate are connected by a second fastener. The second ends of the first upper clamping plate and the first lower clamping plate and the second ends of the second upper clamping plate and the second lower clamping plate are connected to the limit buckle 4. Both the first fastener and the second fastener include a screw 8, a washer 9 and a nut 10. The fastening force can be increased through the first fastener and the second fastener to prevent poor contact. In addition, other fasteners can also be used for connection, such as structures like pins and rivets, as long as they can play a fixing role.

[0030] In addition, one end of the first buckle 5 close to the limit buckle 4 is provided with a first connection end, and one end of the second buckle 6 close to the limit buckle 4 is provided with a second connection end. The first connection end and the second connection end are bent upward. Through holes are provided on the vertical plates bent upward, and the bending part has an arc transition.

[0031] Further, the second ends of the first terminal post 1 and the second terminal post 2 are provided with opening grooves. The first terminal post 1 and the second terminal post 2 can prevent their own rotation through their respective opening grooves, and the opening groove structure can also be soldered to connect with other structures.

[0032] Among them, an insulating block 7 is provided in the opening groove at the second end of the second terminal post 2. The second end of the first terminal post 1 is connected to the insulating block 7. The insulating block 7 is preferably an epoxy cylindrical insulating block 7, which can play an insulating and positioning role.

[0033] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0034] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coaxial joint structure for a gradient coil cable, characterized in that, it includes: a first terminal, a second terminal, and a buckle assembly. The second terminal is sleeved on the radial outer side of the first terminal through a spaced insulating sleeve. The first end of the first terminal extends out of the second terminal and is connected to the buckle assembly, and the first end of the second terminal is connected to the buckle assembly.

2. The coaxial joint structure for a gradient coil cable according to claim 1, characterized in that, the buckle assembly includes a first buckle and a second buckle. A first card slot is provided on the outer periphery of the first end of the first terminal, and the first buckle is used for snap connection with the first card slot. A second card slot is provided on the outer periphery of the first end of the second terminal, and the second buckle is used for snap connection with the second card slot.

3. The coaxial joint structure for a gradient coil cable according to claim 2, characterized in that, it further includes a limit buckle for isolating the first buckle and the second buckle.

4. The coaxial joint structure for a gradient coil cable according to claim 3, characterized in that, the limit buckle is an I-shaped block, and the first buckle and the second buckle are respectively located in the limit slots on both sides of the I-shaped block.

5. The coaxial joint structure for a gradient coil cable according to claim 4, characterized in that, the first buckle includes a first upper card plate and a first lower card plate for snap connection on the first card slot. The first ends of the first upper card plate and the first lower card plate are connected by a first fastener; the second buckle includes a second upper card plate and a second lower card plate for snap connection on the second card slot. The first ends of the second upper card plate and the second lower card plate are connected by a second fastener, and the second ends of the first upper card plate and the first lower card plate and the second ends of the second upper card plate and the second lower card plate are connected to the limit buckle.

6. The coaxial joint structure for a gradient coil cable according to claim 5, characterized in that, a first connection end is provided at one end of the first buckle close to the limit buckle, and a second connection end is provided at one end of the second buckle close to the limit buckle.

7. The coaxial joint structure for a gradient coil cable according to claim 6, characterized in that, the first connection end and the second connection end are bent upward.

8. The coaxial joint structure for a gradient coil cable according to any one of claims 1 to 7, characterized in that, open slots are provided at the second ends of the first terminal and the second terminal.

9. The coaxial joint structure for a gradient coil cable according to claim 8, characterized in that, an insulating block is provided in the open slot at the second end of the second terminal, and the second end of the first terminal is connected to the insulating block.

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