Ion source electrode lead wire connecting terminal
By employing a multi-point contact conductor design in the electrode connection terminal of the mass spectrometer ion source, combined with beryllium copper material and nickel plating, the problem of easy failure of connection terminals in the prior art is solved, and stable and reliable electrical connection and current transmission are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-18
- Publication Date
- 2026-03-31
AI Technical Summary
The electrode connection terminals of the ion source in existing mass spectrometers are prone to failure due to stress, resulting in unstable electrical connections, reduced contact area, easy breakage, and affecting the uniformity and reliability of current transmission.
Design a connection terminal including a terminal block and a conductor. The conductor consists of multiple conductive sheets that provide multi-point contact pressure. It is made of beryllium copper and has a nickel plating layer. Combined with ceramic terminal blocks and threaded connections, it forms a closed conductive structure to ensure stable connection and reduce current loss.
It improves the stability and uniformity of electrical connections, reduces contact resistance fluctuations, extends service life, adapts to complex environments, and reduces maintenance costs and difficulties.
Smart Images
Figure CN224067651U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic components for mass spectrometers, and more specifically, to an ion source electrode lead connection terminal. Background Technology
[0002] In modern electronic connection technology, terminal connectors are widely used in precision instruments, aerospace, automotive electronics, medical equipment, nuclear industry, and other fields. Traditional terminal connectors typically employ rigid plug-in structures or ordinary elastic contact structures, such as spring terminals or socket terminals. Among these, socket terminals are generally the core components for completing electrical connections, consisting of male and female contact assemblies, with electrical connections achieved through the mating of the male and female contacts.
[0003] The current mass spectrometer ion source electrode connection terminal uses a socket terminal with a cross-shaped slotted structure. A deep cross-shaped slot is cut at the terminal inlet, and the terminal opening is cut into four quarter-circular protrusions. Because the ion source analyzes highly corrosive gases, 316L stainless steel is chosen as the material for the connector. However, its rigidity is too high, and there are only four slotted contacts. After the ion source is assembled, there is stress in the vertical direction. Under this stress, the slotted contacts of the lead terminal are prone to failure. Due to its structural design, when the lead is inserted into the connection terminal, the four quarter-circular protrusions expand outwards in a flower-like pattern under stress, reducing the contact area between the lead and the protrusions and leading to failure. This not only affects electrical transmission but also makes the lead prone to detachment. Furthermore, this design is prone to deformation and breakage at the port under prolonged use, presenting a drawback. Utility Model Content
[0004] The purpose of this invention is to provide an ion source electrode lead connection terminal, which provides multi-point contact pressure when the electrode lead pin is inserted through a set conductor, ensuring a stable and reliable electrical connection. At the same time, it solves the problems of easy deformation, breakage and disconnection of the cross-slot structure in the prior art, reduces contact resistance fluctuation and improves the uniformity of current transmission.
[0005] To solve the above-mentioned technical problems, the technical solution adopted in this application is as follows:
[0006] This application provides an ion source electrode lead connection terminal, which includes a terminal post with a blind hole inside the terminal post, a conductor embedded in the blind hole, and the conductor including a plurality of evenly spaced conductive sheets and positioning rings disposed at both ends of the conductive sheets, with the middle ends of the plurality of conductive sheets protruding toward the side away from the inner wall of the blind hole.
[0007] The connection terminals of this application are used on the ion source electrode plates in a mass spectrometer. The terminals are fixed on the electrode plates, and the electrode plates are electrically connected to the connectors through the terminals, thereby connecting to the power supply to complete the electrical connection and make the electrode plates energized. In order to overcome the shortcomings of the prior art, this application sets a conductor in the terminal. The conductor is cylindrical with wide ends and narrow middle, and is composed of several conductive plates, so that the middle end of the conductor is elastic. When it is plugged into the lead wire, it can increase the contact pressure and reduce the contact resistance. At the same time, the elastic structure can ensure multi-point contact between the lead wire and the conductor when plugged in, increasing the effective conductive area. In addition, the elastic structure can also buffer mechanical vibration, avoid loosening of the connection due to vibration, and prevent the risk of lead wire falling off and current leakage.
[0008] In existing technologies, the socket terminals involve direct contact between the lead wire and the terminal itself. The terminal itself acts as a conductive medium to transfer electrons to the electrode plate. During this process, the terminal is an open medium, and electrons coming into contact with the air through the terminal will cause current leakage, resulting in electron transmission loss and ultimately affecting the test data. In this application, a conductor is used as the conductive medium, and the conductor is wrapped by the terminal post, so that the electrons are in a closed environment, allowing the electrons to flow directionally to the electrode plate, reducing electron leakage and current loss, and making the test results more accurate.
[0009] Furthermore, the aforementioned terminals can be made of ceramic material. Ceramic terminals, as insulating materials, further prevent electron leakage, ensuring that electrons can only be transmitted directionally through conductors, reducing electron loss during transmission, and increasing the accuracy of test data.
[0010] Furthermore, the above also includes a cover, which has a first through hole and is detachably connected to the opening of the terminal block. The first through hole communicates with the blind hole. The cover can fix the conductor and guide the insertion of the lead wire. At the same time, the addition of the cover provides additional support for the terminal block and reduces the risk of deformation of the terminal block under stress.
[0011] Furthermore, a fixing post is connected to the end of the aforementioned terminal block away from the cover. A second through hole is provided in the fixing post, which communicates with the blind hole. The fixing post is used to fix the terminal block and the electrode plate, and the second through hole forms a through lead channel to guide the flow of electrons.
[0012] Furthermore, a stainless steel wire rope is welded to the end of the fixed post away from the terminal post. The stainless steel wire rope serves as a guiding medium for electrons, guiding the outflow of electrons.
[0013] Furthermore, an annular protrusion is provided within the aforementioned blind hole. This annular protrusion is fixed to the end of the inner wall of the terminal block away from the cover. The annular protrusion divides the blind hole into a large-diameter space and a small-diameter space. The large-diameter space is used to place the conductor, and the annular protrusion also has a positioning function for the conductor, ensuring that the conductor is stably fixed within the blind hole and preventing axial movement within the blind hole. This ensures a fixed contact position and reduces local stress concentration. At the same time, after the conductor is inserted, it is circumferentially embedded in the inner wall of the terminal block within the large-diameter space, so that the inner diameter of the small-diameter space matches the inner diameter of the conductor, making the connection tighter when the lead is inserted. The small-diameter space provides a buffer space for electrons, allowing electrons to be concentrated and transmitted to the electrode plate, reducing current loss.
[0014] Furthermore, the aforementioned cover is threaded to the terminal block. The threaded structure provides a secure lock to prevent accidental loosening, while the threaded engagement can press the contact surface tightly, reducing the risk of external contaminants entering.
[0015] Furthermore, the aforementioned conductive sheet consists of 12 pieces. These 12 conductive sheets are evenly spaced and arranged around the center of the blind hole to form a symmetrical elastic contact structure. This ensures that the radial pressure on the lead wire is consistent, avoiding local stress concentration that could damage the lead wire. At the same time, the multiple conductive sheets are connected in parallel to conduct electricity, dispersing the current load, reducing the current density of a single sheet, reducing heat generation, and achieving 360° mating and multi-point contact for the lead wire.
[0016] Furthermore, the surface of the aforementioned conductors is coated with an anti-corrosion layer. Since the ion source analysis substance is a highly corrosive gas, an anti-corrosion layer is provided to resist corrosion. Corrosion of the conductor also affects its conductivity, thus avoiding increased contact resistance due to oxidation and extending the service life of the conductor.
[0017] Furthermore, the surface of the aforementioned conductors is coated with a nickel plating layer. The nickel plating layer has excellent conductivity and at the same time isolates and prevents direct contact between the conductor and corrosive media, thereby improving the service life of the conductor without affecting its conductivity.
[0018] Furthermore, the diameter of the first through hole is smaller than that of the blind hole, forming a stepped structure that limits the insertion of the lead wire. Since the conductor is an elastic structure, the end of the lead wire will have an elastic swing amplitude after insertion. Therefore, the first through hole restricts the displacement of the lead wire after insertion, preventing the lead wire from falling off due to the swing, making the lead wire connection tighter, and ensuring that the effective contact area between the lead wire and the conductive sheet is concentrated in the raised part.
[0019] Furthermore, the aforementioned conductor is detachably connected to the inner wall of the terminal block via an interference fit. One end of the conductor abuts against the annular protrusion, and the other end abuts against the inner wall of the cover. This detachable connection facilitates the maintenance and replacement of the conductor. As a consumable, the conductor has a limited service life. This design allows users to easily replace the conductor directly. In contrast, in existing technologies, if the terminal is damaged, all terminals must be replaced, increasing the cost of use and maintenance difficulty. At the same time, the bidirectional abutment forms a two-phase mechanical limit, ensuring that the conductor does not move axially within the blind hole. Combined with the elastic contact of the conductive sheet, it adapts to dynamic working conditions such as vibration.
[0020] Furthermore, the aforementioned conductor is made of beryllium copper. The conductivity of beryllium copper is close to that of pure copper, which can reduce energy loss. At the same time, beryllium copper has a high elastic modulus, which can maintain contact pressure even after long-term use. It has strong recovery ability after elastic deformation, making it suitable for high-frequency insertion and removal scenarios and extending the service life of the terminal. Its material has high hardness, which resists the mechanical stress when the lead is inserted and prevents the conductive sheet from deforming and failing.
[0021] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:
[0022] 1. Compared to the traditional cross-slot connection with only 4 contacts, the conductive body in this application achieves 360° uniform interlocking through 12 contacts, which greatly increases the contact area, makes the electrical connection more stable, reduces contact resistance fluctuations, and improves the uniformity of current transmission.
[0023] 2. Traditional cross-slotted structures are prone to deformation or breakage after repeated insertion and removal. In contrast, the conductor adopts a ring-shaped elastic structure, which can provide multi-point contact pressure when the pin is inserted and maintain elastic deformation recovery capability, effectively reducing insertion and removal losses and improving service life. The material is made of high-elasticity beryllium copper, which has both good conductivity and fatigue resistance, ensuring that it is not easily damaged during long-term use.
[0024] 3. The conductive surface is nickel-plated to improve corrosion resistance, making it suitable for complex environments such as high temperature, high corrosion, and strong electric fields, ensuring long-term stable operation.
[0025] 4. The design structure of this application makes the pin-type connection more convenient, and the connection is completed immediately upon insertion, reducing installation time, improving maintenance efficiency, and facilitating disassembly and replacement, thereby improving the maintainability of the overall system. Attached Figure Description
[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 A schematic diagram of the overall structure of an ion source electrode lead connection terminal provided in an embodiment of this utility model;
[0028] Figure 2 An exploded view of an ion source electrode lead connection terminal provided for an embodiment of this utility model;
[0029] Figure 3 A side view of an ion source electrode lead connection terminal provided for an embodiment of this utility model;
[0030] Figure 4 A cross-sectional view (AA) of an ion source electrode lead connection terminal provided for an embodiment of this utility model.
[0031] Icons: 100 - Terminal block; 110 - Blind hole; 120 - Annular protrusion; 200 - Conductor; 210 - Conductive sheet; 220 - Positioning ring; 300 - Cover; 310 - First through hole; 400 - Fixing post; 410 - Second through hole. Detailed Implementation
[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.
[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.
[0034] Example
[0035] Please refer to Figure 1-4 , Figure 1 The diagram shown is a schematic representation of the overall structure of this embodiment. Figure 2 The image shown is an exploded view of this embodiment; Figure 3 The image shown is a side view of this embodiment; Figure 4 The figure shown is a cross-sectional view AA of this embodiment.
[0036] like Figure 1-4 As shown, this embodiment provides an ion source electrode lead connection terminal, which includes a terminal post 100, a blind hole 110 inside the terminal post 100, a conductor 200, the conductor 200 being embedded in the blind hole 110, the conductor 200 including a plurality of evenly spaced conductive sheets 210 and positioning rings 220 disposed at both ends of the conductive sheets 210, the middle ends of the plurality of conductive sheets 210 protruding toward the side away from the inner wall of the blind hole 110.
[0037] In an embodiment of this utility model, the terminal block 100 is made of ceramic.
[0038] In this embodiment, the ceramic terminal 100 serves as an insulating material, further preventing the leakage of electrons and allowing electrons to be directionally transmitted through the conductor 200, thereby reducing electron loss during transmission and increasing the accuracy of test data.
[0039] like Figure 1-4 As shown, in an embodiment of this utility model, a cover body 300 is also included. The cover body 300 has a first through hole 310 and is detachably connected to the opening of the terminal block 100. The first through hole 310 communicates with the blind hole 110.
[0040] In this embodiment, the cover 300 can fix the conductor 200 and guide the insertion of the lead wire. At the same time, the addition of the cover 300 provides additional support for the terminal 100, reducing the risk of deformation of the terminal 100 under stress.
[0041] like Figure 1-4 As shown in the embodiment of this utility model, the end of the terminal block 100 away from the cover 300 is connected to a fixing post 400, and a second through hole 410 is provided in the fixing post 400, which communicates with the blind hole 110.
[0042] In this embodiment, the fixing post 400 is used to fix the terminal post 100 to the electrode plate, and the second through hole 410 forms a through lead channel to guide the flow of electrons.
[0043] In an embodiment of this utility model, a stainless steel wire rope is welded to the end of the fixing post 400 away from the terminal post 100. The stainless steel wire rope serves as a guiding medium for electrons, guiding the outflow of electrons.
[0044] like Figure 1-4As shown, in an embodiment of this utility model, an annular protrusion 120 is provided inside the blind hole 110, and the annular protrusion 120 is fixed to the end of the inner wall of the terminal block 100 away from the cover 300.
[0045] In this embodiment, the annular protrusion 120 divides the blind hole 110 into a large-diameter space and a small-diameter space. The large-diameter space is used to place the conductor 200, and the annular protrusion 120 also has a positioning function for the conductor 200, so that the conductor 200 is stably fixed in the blind hole 110, preventing the conductor 200 from moving axially in the blind hole 110, ensuring a fixed contact position, reducing local stress concentration. At the same time, after the conductor 200 is inserted, it is circumferentially embedded in the inner wall of the terminal post 100 in the large-diameter space, so that the inner diameter of the small-diameter space matches the inner diameter of the conductor 200, making the connection tighter when the lead is inserted. The small-diameter space provides a buffer space for electrons, allowing electrons to be concentrated and transmitted to the electrode plate, reducing current loss.
[0046] In the embodiments of this utility model, the cover 300 is threadedly connected to the terminal block 100. The threaded structure can provide a firm lock to prevent accidental loosening. At the same time, the threaded engagement can press the contact surface tightly to reduce the risk of external pollutants entering.
[0047] like Figure 1-4 As shown, in an embodiment of this utility model, there are 12 conductive sheets 210.
[0048] In this embodiment, 12 conductive sheets 210 are arranged at uniform intervals around the center of the blind hole 110 to form a symmetrical elastic contact structure, so that the radial pressure on the lead wire is consistent, avoiding local stress concentration that could damage the lead wire. At the same time, the multiple conductive sheets 210 are connected in parallel to conduct electricity, dispersing the current load, reducing the current density of a single sheet, reducing heat generation, and achieving 360° mating and multi-point contact for the lead wire.
[0049] In the embodiments of this utility model, the surface of the conductor 200 is coated with an anti-corrosion layer.
[0050] In this embodiment, since the ion source analysis substance is a highly corrosive gas, an anti-corrosion layer is provided to resist corrosion. Corrosion of the conductor 200 also affects its conductivity, thus avoiding increased contact resistance due to oxidation and extending the service life of the conductor 200.
[0051] Specifically, in the embodiments of this utility model, the surface of the conductor 200 is coated with a nickel plating layer.
[0052] The nickel plating layer has excellent conductivity and at the same time isolates and prevents the conductor 200 from direct contact with corrosive media, thereby improving the service life of the conductor 200 without affecting its conductivity.
[0053] like Figure 1-4 As shown, in an embodiment of this utility model, the diameter of the first through hole 310 is smaller than the diameter of the blind hole 110.
[0054] In this embodiment, the first through hole 310 and the blind hole 110 form a stepped structure, which limits the insertion of the lead wire. Since the conductor 200 is an elastic structure, the end of the lead wire will have an elastic swing amplitude after insertion. Therefore, the first through hole 310 restricts the displacement of the lead wire after insertion, prevents the lead wire from falling off due to the swing of the lead wire, makes the lead wire connection tighter, and ensures that the effective contact area between the lead wire and the conductive sheet 210 is concentrated in the protruding part.
[0055] like Figure 1-4 As shown, in an embodiment of this utility model, the conductor 200 is detachably connected to the inner wall of the terminal 100 by an interference fit, and one end of the conductor 200 abuts against the annular protrusion 120, while the other end abuts against the inner wall of the cover 300.
[0056] In this embodiment, the detachable connection facilitates the maintenance and replacement of the conductor 200. As a consumable, the conductor 200 has a limited service life. This design allows users to directly replace the conductor 200. In the prior art, if the terminal is damaged, all terminals must be replaced, which increases the cost of use and the difficulty of maintenance. At the same time, the bidirectional contact forms a two-phase mechanical limit, ensuring that the conductor 200 does not move axially within the blind hole 110. Combined with the elastic contact of the conductive sheet 210, it can adapt to dynamic working conditions such as vibration.
[0057] Specifically, in this embodiment, the conductor 200 is made of beryllium copper. The conductivity of beryllium copper is close to that of pure copper, which can reduce energy loss. At the same time, beryllium copper has a high elastic modulus, which can maintain contact pressure after long-term use. It has strong recovery ability after elastic deformation, making it suitable for high-frequency insertion and removal scenarios and extending the service life of the terminal. Its material has high hardness, which resists the mechanical stress when the lead is inserted and prevents the conductive sheet 210 from deforming and failing.
[0058] In use, the terminal 100 is fixedly connected to the electrode plate of the ion source via the fixing post 400. A stainless steel wire rope is welded to the end of the fixing post 400 away from the terminal 100 to guide the electron flow to the electrode plate. The cover 300 is threaded to the opening of the terminal 100, forming an axial limit on the conductor 200. The electrode lead pin is inserted into the blind hole 110 through the first through hole 310 of the cover 300. The pin presses against the protruding part in the middle of the conductive sheet 210, causing the 12 conductive sheets 210 to undergo uniform elastic deformation under radial pressure. The elastic protruding part forms a 360° annular multi-point contact with the lead surface, ensuring stable contact between the pin and the conductor 200. The conductive plate 210, made of beryllium copper, provides stable elastic restoring force, ensuring uniform distribution of contact pressure, reducing contact resistance fluctuations, and uniform current transmission. The ceramic terminal 100 isolates electron leakage, and together with the closed structure of the conductor 200, avoids current loss. The nickel-plated anti-corrosion layer resists strong corrosive gases, ensuring long-term stable operation. In vibration or high-frequency insertion / removal scenarios, the elastic restoring capability of the conductive plate 210 and the interference fit mechanical limit prevent the pins from loosening or falling off, ensuring connection reliability in dynamic environments. When maintenance is required, the conductor 200 can be disassembled and replaced by unscrewing the cover 300, which is convenient and reduces maintenance costs.
[0059] When not in use, keep the cover 300 and the terminal 100 threadedly connected. Utilize the limiting step of the first through hole 310 and the sealing effect of the cover 300 to prevent external dust, moisture, or corrosive gases from entering the blind hole 110, thus avoiding corrosion of the nickel plating layer on the surface of the conductor 200. Regularly check whether the cover 300 is tight and whether the terminal 100 has cracks. If maintenance is required, the cover 300 can be disassembled to check the wear of the conductor 200. Wearing conductors 200 can be easily replaced through interference fit, reducing overall maintenance costs. If the device is not in use for a long period, remove the connection terminal from the electrode plate and store it in a dry environment free of corrosive gases. This releases the elastic stress of the conductive plate 210, ensuring stable and reliable contact pressure during the next use. This prevents the conductor 200 from losing elasticity or corroding due to long-term stress or environmental factors, extending the component's service life.
[0060] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.
Claims
1. An ion source electrode lead connection terminal, characterized by, The utility model relates to a terminal post, which comprises: a terminal post with a blind hole in it; a conductive body embedded in the blind hole; the conductive body comprises a plurality of uniformly spaced conductive sheets and positioning rings arranged at both ends of the conductive sheets, and the middle end of each conductive sheet is raised away from the inner wall of the blind hole.
2. An ion source electrode lead connection terminal according to claim 1, wherein The utility model also comprises a cover with a first through hole, and the cover is detachably connected with the opening part of the terminal post, and the first through hole is in communication with the blind hole.
3. An ion source electrode lead connection terminal according to claim 2, wherein The end of the terminal post away from the cover is connected with a fixing post, and the fixing post has a second through hole in it, which is in communication with the blind hole.
4. An ion source electrode lead connection terminal according to claim 2, wherein An annular protrusion is arranged in the blind hole, and the annular protrusion is fixed to the end of the inner wall of the terminal post away from the cover.
5. An ion source electrode lead connection terminal according to claim 2, wherein The cover is threadedly connected with the terminal post.
6. An ion source electrode lead connection terminal according to claim 1, wherein The conductive body has 12 conductive sheets.
7. An ion source electrode lead connection terminal according to claim 1, wherein The surface of the conductive body is coated with an anticorrosive layer.
8. An ion source electrode lead connection terminal according to claim 2, wherein The aperture of the first through hole is smaller than that of the blind hole.
9. An ion source electrode lead connection terminal according to claim 4, wherein The conductive body is detachably connected with the inner wall of the terminal post through interference fit, and one end of the conductive body abuts against the annular protrusion, and the other end abuts against the inner wall of the cover.
10. The ion source electrode lead connection terminal of claim 1, wherein, The conductive body is made of beryllium copper.