A TVS device

Abstract

The application discloses a TVS device and relates to the technical field of semiconductor devices.The TVS device comprises a plastic-sealed packaging body, the two sides of the plastic-sealed packaging body are connected with patch electrode pins, and the patch electrode pins are arranged in an L-shaped mode.In the process of mounting the TVS device, the whole mechanical linkage is triggered by linkage, and the stretchable assembly and the transmission assembly are precisely driven, so that the pin adhering part is tightly adhered to the solder pad coated with red glue, the problems of edge warping, suspension and virtual adhesion are eliminated, the red glue pre-fixing effect and the subsequent welding quality are greatly improved, the deformation defects such as inward folding, outward expansion and skewing of the L-shaped pin in the assembling process are effectively prevented, the pin always keeps a standard forming posture, the effective contact area of the pin and the solder pad is maximized, the adverse problems such as virtual welding, delamination and open circuit are avoided from the root, the electrical connection stability and the transient voltage suppression protection performance of the TVS device are ensured, and the overall working reliability and service life of the circuit board are improved.

Description

Technical Field

[0001] This invention relates to the field of semiconductor device technology, specifically to a TVS device. Background Technology

[0002] TVS devices are commonly used semiconductor protection devices, mainly connected in parallel between the power supply circuit, signal line, and ground terminal on a circuit board. When the circuit is working normally, the TVS device is in a high-impedance cutoff state, which will not affect the normal power supply and signal transmission of the line. When the line encounters transient high voltage impacts such as static electricity or surge voltage, the device can quickly conduct within nanoseconds, discharging the surge current to the ground terminal and clamping the line voltage within a safe range, thereby protecting downstream electronic components. They are widely used in various industrial control and testing instrument circuit boards.

[0003] Most TVS devices on the market currently adopt a surface mount structure, consisting of a plastic-encapsulated body and L-shaped surface mount electrode leads on both sides. They are assembled onto a PCB circuit board using SMT technology. The assembly process is as follows: first, red glue is applied to the PCB pad area. After the TVS device is in place, the red glue is used to adhere to the surface mount electrode leads on the TVS device to achieve mechanical pre-fixation. Then, reflow soldering is used to melt the solder and fuse the surface mount electrode leads to the pads, thereby reducing the risk of device displacement and solder joint cracking caused by equipment vibration.

[0004] However, during the entire process of device transfer, pickup and placement, red glue pre-fixation and soldering, the surface-mount electrode leads on both sides of the TVS device are prone to bending and deflection deformation due to factors such as assembly pressure and uneven force on the contact surface. After the leads are deformed, their bonding part cannot make full contact with the PCB pads, greatly reducing the effective bonding area. This not only easily produces soldering defects such as cold solder joints and false solder joints, leading to a decrease in electrical connection reliability, but also further causes problems such as solder joint detachment and circuit breakage under long-term equipment vibration and temperature cycling conditions. As a result, the TVS device loses its transient voltage suppression protection function, affecting the stability and service life of the entire circuit board. Therefore, we propose a TVS device. Summary of the Invention

[0005] The purpose of this invention is to provide a TVS device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a TVS device, comprising a plastic package body, wherein surface mount electrode leads are connected to both sides of the plastic package body, the surface mount electrode leads are L-shaped, and the surface mount electrode leads are divided into a bent portion for connecting with the interior of the plastic package body and a bonding portion for bonding with pads, and further comprising: A base plate is attached to the bottom of the plastic encapsulation body, and an installation component for assisting the base plate to be attached and installed is provided between the base plate and the plastic encapsulation body. A correction pressure assembly is disposed on the base plate. Two sets of correction pressure assemblies are symmetrically disposed on the base plate, and the two sets of correction pressure assemblies are used to correct and push the two sets of patch electrode pins respectively. In addition, a transmission component for transmitting the correction pressure component is provided on the base plate. A telescopic component for auxiliary telescopic connection is provided between the transmission component and the base plate. A linkage component for linkage during the installation of the patch electrode pins is provided on the telescopic component. Under the combined action of the linkage component, the transmission component and the correction pressure component, the patch electrode pins are prevented from bending and corrected during the installation of the patch electrode pins.

[0007] Preferably, the corrective pressure assembly includes a sliding plate, and a sliding assembly for assisting sliding connection is provided between the sliding plate and the base plate. A pressure plate for pressing against the inner side of the fitting part is connected to the bottom of the sliding plate through an elastic assembly. The bottom of the pressure plate is rotatably connected to multiple sets of ball bearings for assisting pressing through multiple sets of spherical grooves, and the multiple sets of ball bearings are arranged in a circular array at the bottom of the pressure plate. An inclined surface for abutting against the end of the fitting part is provided on one side of the pressure plate. Two sets of corrective rods for abutting against the inner side of the bent part for correction are fixed symmetrically on one side of the sliding plate.

[0008] Preferably, the elastic component includes multiple sets of first sleeves fixed on the slide plate, with a first slide rod slidably connected to the first sleeve. One end of the first slide rod is fixed to the pressure plate. Each set of first slide rods is arranged in a circular array at the four corners of the pressure plate. A first spring is sleeved on the outside of the first sleeve, and both ends of the first spring are connected to the slide plate and the pressure plate, respectively.

[0009] Preferably, the sliding assembly includes two sets of symmetrically arranged sliding grooves on the sliding plate, and two sets of sliding rails are fixed to the bottom of the base plate. The sliding plate is slidably connected to the bottom of the base plate through the cooperation of the two sets of sliding grooves and sliding rails.

[0010] Preferably, two sets of the transmission components are symmetrically arranged on both sides of the slide plate.

[0011] Preferably, the transmission assembly includes a transmission plate disposed on one side of the slide plate, the transmission plate having two sets of symmetrically arranged inclined grooves, and transmission pins slidably connected to the inclined grooves, with one end of each set of transmission pins fixed to the two sets of slide plates respectively.

[0012] Preferably, the linkage component is disposed between two sets of transmission components. The linkage component includes a strip plate, which is fixed between the two sets of transmission plates. Multiple sets of linkage rods are fixed to the bottom of the strip plate.

[0013] Preferably, the telescopic assembly includes two sets of second sleeves symmetrically fixed to the base plate, with a second slide rod slidably connected to the second sleeve. One end of the second slide rod is fixed to the strip plate, and a second spring is sleeved on the outside of the second sleeve. The two ends of the second spring are respectively connected to the base plate and the strip plate.

[0014] Preferably, the mounting assembly includes mounting slots on both sides of the bottom of the plastic encapsulation body, two sets of mounting brackets are fixed symmetrically on the base plate, mounting shafts are rotatably connected to the mounting brackets, and L-shaped clamps for mounting with the mounting slots are fixed on the mounting shafts.

[0015] Compared with the prior art, the beneficial effects of the present invention are: This invention, through symmetrically arranged correction rods, can push and limit the correction from the inside of the bent part of the L-shaped surface mount electrode pins during the assembly and pressing process of the device. This effectively solves the deformation problems such as inward bending, outward expansion, skewing, and deflection of the pins caused by compression and uneven force during the SMT placement and red glue pre-fixation process of traditional TVS devices. It always ensures that the surface mount electrode pins on both sides maintain the standard L-shaped structure, and avoids assembly misalignment problems caused by pin deformation from the root cause. This invention features an elastic clamping structure with ball bearings, which allows for adaptive elastic clamping of the pin contact area during assembly. This forces the pin contact area to fit tightly against the pre-coated red glue pads on the PCB, eliminating problems such as pin warping, suspension, and incomplete contact that are common in traditional assembly. It maximizes the effective contact area between the pins and the pads, effectively avoids welding defects such as cold solder joints, false solder joints, and cracked solder joints, and significantly improves the welding and fixing quality of TVS devices and circuit boards. This invention relies on the overall mechanical linkage of the assembly pressing action trigger linkage rod, telescopic component, and transmission component. It eliminates the need for manual adjustment and correction structure, and can simultaneously complete pin correction and pressing operations in the conventional SMT assembly process of devices without adding extra processes and equipment. It is compatible with automated surface mount production lines, has high assembly efficiency, and can meet the standardized assembly production needs of large-volume TVS devices. This invention enables rapid assembly and disassembly of the base plate and the plastic-encapsulated body through a detachable mounting component. After the device is soldered and fixed, the base plate and the entire set of straightening, transmission and linkage structures can be disassembled and removed as a whole and reused in subsequent assembly operations. There is no need to use a special disposable assembly fixture, which greatly reduces the cost of SMT assembly auxiliary consumables and fixtures. The structure is more versatile and practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall external structure of the present invention; Figure 2 This is a schematic diagram of the bottom structure of the TVS device of the present invention; Figure 3 This is a schematic diagram of the plastic encapsulation body structure of the present invention; Figure 4 This is a schematic diagram of the installation component structure of the present invention; Figure 5 This is a schematic diagram of the transmission component and linkage component of the present invention; Figure 6 This is a schematic diagram of the corrective pressure assembly structure of the present invention; Figure 7 This is a schematic diagram of the elastic component structure of the present invention; Figure 8 This is a schematic diagram of the corrective pressure assembly and transmission assembly of the present invention; Figure 9 This is a schematic diagram of the transmission component and telescopic component of the present invention; Figure 10 This is a schematic diagram showing the state of the correction pressure assembly before installation of the TVS device of the present invention. Figure 11 This is a schematic diagram showing the state of the correction pressure assembly after the TVS device of the present invention is installed.

[0017] In the diagram: 101-Plastic encapsulation body; 102-Surface mount electrode pin; 1021-Bending part; 1022-Fitting part; 2-Base plate; 301-Mounting groove; 302-Mounting bracket; 303-Mounting shaft; 304-L-shaped clamping plate; 401-Slide plate; 402-Pressure plate; 403-Spherical groove; 404-Ball bearing; 405-Chamfered surface; 406-Correction rod; 501-First sleeve; 502-First slide rod; 503-First spring; 601-Slide groove; 602-Slide rail; 701-Transmission plate; 702-Chamfered groove; 703-Transmission pin; 801-Strip plate; 802-Linkage rod; 901-Second sleeve; 902-Second slide rod; 903-Second spring. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1

[0020] Please see Figures 1-11The TVS device shown in the figure includes a plastic package body 101. The plastic package body 101 has surface mount electrode pins 102 connected to both sides. The surface mount electrode pins 102 are L-shaped and are divided into a bent portion 1021 for connecting with the inside of the plastic package body 101 and a bonding portion 1022 for bonding with the pad. It should be noted here that the plastic encapsulation body 101 and the surface mount electrode pins 102 are conventional technical components in this application, and their working principle and installation method will not be described in detail here. Furthermore, the installation method and subsequent soldering of TVS devices and circuit boards are conventional technical means in the technical field of this application, and their working principles and steps will not be elaborated in detail here.

[0021] Also includes: The base plate 2 is attached to the bottom of the plastic encapsulation body 101, and an installation component for assisting the attachment and installation of the base plate 2 is provided between the base plate 2 and the plastic encapsulation body 101. The correction pressure assembly is set on the base plate 2. Two sets of correction pressure assemblies are symmetrically arranged on the base plate 2, and the two sets of correction pressure assemblies are used to correct and push the two sets of patch electrode pins 102 respectively. In addition, a transmission component for transmitting the correction pressure component is provided on the base plate 2. A telescopic component for auxiliary telescopic connection is provided between the transmission component and the base plate 2. A linkage component for linkage during the installation of the patch electrode pin 102 is provided on the telescopic component. Under the combined action of the linkage component, the transmission component and the correction pressure component, the patch electrode pin 102's contact part 1022 and bending part 1021 are corrected against bending during the installation of the patch electrode pin 102. It should be noted that during the TVS device installation process, the overall mechanical linkage is triggered by a linkage mechanism. Through the telescopic and transmission components, the device is precisely driven to ensure that the pin contact part 1022 is tightly attached to the pre-coated red glue pad, eliminating issues such as lifting, hanging, and incomplete attachment. This significantly improves the pre-fixation effect of the red glue and the subsequent soldering quality. It also effectively prevents deformation defects such as inward bending, outward expansion, and skewing of the L-shaped pins during assembly, ensuring that the pins always maintain a standard forming posture. This maximizes the effective contact area between the pins and the pads, avoiding defects such as cold solder joints, desoldering, and open circuits at the source. This ensures the electrical connection stability and transient voltage suppression protection performance of the TVS device, and improves the overall reliability and service life of the circuit board.

[0022] Preferably, the corrective pressure assembly includes a slide plate 401, a sliding assembly for assisting sliding connection is provided between the slide plate 401 and the base plate 2, a pressure plate 402 for pressing against the inner side of the fitting part 1022 is connected to the bottom of the slide plate 401 by an elastic assembly, the bottom of the pressure plate 402 is rotatably connected to multiple sets of spherical grooves 403 for assisting pressing, and the multiple sets of balls 404 are arranged in a ring array at the bottom of the pressure plate 402, a slope 405 for abutting against the end of the fitting part 1022 is provided on one side of the pressure plate 402, and two sets of corrective rods 406 for abutting against the inner side of the bending part 1021 are fixed symmetrically on one side of the slide plate 401; It should be noted here that: through transmission, the two sets of sliding plates 401 are subjected to force and slide away from each other along the bottom of the base plate 2. During the movement of the sliding plates 401, through the telescopic connection between the first sleeve 501 and the first slide rod 502 on the elastic component, the lower pressure plate 402 is driven to move synchronously towards the patch electrode pin 102. During the movement, the inclined surface 405 on the side of the pressure plate 402 first abuts against the end of the bonding part 1022. Due to the obstruction of the pin, the pressure plate 402 presses the elastic component in the opposite direction, causing the first slide rod 502 to retract along the first sleeve 501. The first spring 503 is compressed, realizing that the pressure plate 402 retracts towards the sliding plate 401 to avoid it. When the pressure plate 402 moves to the bonding part 1022... After being positioned directly above, the spring force of the first spring 503 pushes the pressure plate 402 downwards, causing the ball bearing 404 in the spherical groove 403 at the bottom of the pressure plate 402 to press tightly against the upper surface of the mating part 1022. Utilizing the flexible rotation of the ball bearing 404, while maintaining continuous pressure, it does not obstruct the subsequent sliding of the slide plate 401 and the pressure plate 402. This firmly presses the mating part 1022 onto the circuit board pads, strengthening the adhesive bonding effect and preventing issues such as loose bonding or lifting of the pins and pads. Simultaneously, the slide plate 401... As the components continue to slide towards each other, the correction rods 406 fixed on the side gradually extend into the inside of the bent portion 1021 of the surface mount electrode pin 102 and abut against each other. The two sets of symmetrically arranged correction rods 406 push and correct the bent portion 1021 from the inside, limiting the bent portion 1021 from bending inward or outward. Therefore, during the assembly and installation of the TVS device and the circuit board, the pressure plate 402 is driven to press and position the bonding portion 1022, ensuring that the pin and the pad are fully bonded and improving the reliability of subsequent soldering.

[0023] Preferably, the elastic component includes multiple sets of first sleeves 501 fixed on the slide plate 401, with first slide rods 502 slidably connected to the first sleeves 501. One end of the first slide rod 502 is fixed to the pressure plate 402. The sets of first slide rods 502 are arranged in a circular array at the four corners of the pressure plate 402. A first spring 503 is sleeved on the outside of the first sleeves 501, and the two ends of the first spring 503 are respectively connected to the slide plate 401 and the pressure plate 402. It should be noted that: the first sleeve 501 and the first slide rod 502 facilitate the retraction movement of the pressure plate 402 toward the slide plate 401 after being assisted by force, and the first spring 503 facilitates the elastic push of the pressure plate 402 after the retraction movement.

[0024] Preferably, the sliding assembly includes two sets of symmetrically arranged sliding grooves 601 on the sliding plate 401, and two sets of sliding rails 602 are fixed to the bottom of the base plate 2. The sliding plate 401 is slidably connected to the bottom of the base plate 2 through the cooperation of the two sets of sliding grooves 601 and sliding rails 602. It should be noted here that the slide rail 602 and the slide groove 601 facilitate the sliding connection between the auxiliary slide plate 401 and the base plate 2.

[0025] Preferably, two sets of transmission components are symmetrically arranged on both sides of the slide plate 401; It should be noted here that the stability and effectiveness of the transmission are ensured by using two sets of symmetrically arranged transmission components.

[0026] Preferably, the transmission assembly includes a transmission plate 701 disposed on one side of the slide plate 401. The transmission plate 701 has two sets of symmetrically arranged inclined grooves 702. Transmission pins 703 are slidably connected to the inclined grooves 702. One end of each set of transmission pins 703 is fixed to one of the two sets of slide plates 401. It should be noted here that: the linkage component drives the two transmission plates 701 to move. When the transmission plates 701 move, the interaction between the inclined groove 702 and the transmission pin 703 causes the two sets of slide plates 401 to be subjected to force and move. During the process of the slide plates 401 being subjected to force and moving, the two sets of slide plates 401 are subjected to force and slide away from each other along the bottom of the base plate 2 by means of the sliding component composed of the sliding groove 601 and the sliding rail 602.

[0027] Preferably, the linkage component is disposed between two sets of transmission components. The linkage component includes a strip plate 801, which is fixed between two sets of transmission plates 701. Multiple sets of linkage rods 802 are fixed to the bottom of the strip plate 801. It should be noted here that after the base plate 2 is installed, the TVS device is assembled and installed with the circuit board. During the installation process, the plastic package body 101 of the assembled base plate 2 is pushed toward the circuit board so that the contact part 1022 of the surface mount electrode pins 102 on both sides contacts and adheres to the pads pre-coated with red glue on the circuit board. During the pushing process, the linkage rod 802 at the bottom of the linkage component first abuts against the surface of the circuit board. As the plastic package body 101 continues to move toward the circuit board, in conjunction with the telescopic connection of the second sleeve 901 and the second slide rod 902 to the strip plate 801, the linkage rod 802 is forced to drive the strip plate 801 to perform a relative contraction movement toward one side of the base plate 2.

[0028] Preferably, the telescopic assembly includes two sets of second sleeves 901 symmetrically fixed on the base plate 2. A second slide rod 902 is slidably connected to the second sleeve 901. One end of the second slide rod 902 is fixed to the strip plate 801. A second spring 903 is sleeved on the outside of the second sleeve 901. The two ends of the second spring 903 are respectively connected to the base plate 2 and the strip plate 801. It should be noted here that the two sets of second sleeves 901 and second slide rods 902 facilitate the telescopic connection between the auxiliary strip plate 801 and the base plate 2, and the second spring 903 facilitates the reset after the telescopic movement between the strip plate 801 and the base plate 2.

[0029] Preferably, the mounting assembly includes mounting slots 301 formed on both sides of the bottom of the plastic encapsulation body 101, and two sets of mounting brackets 302 fixed symmetrically on the base plate 2. Mounting shafts 303 are rotatably connected to the mounting brackets 302, and L-shaped clamping plates 304 for mounting with the mounting slots 301 are fixed on the mounting shafts 303. It should be noted here that: before the formal assembly of the TVS device, the base plate 2 is aligned with the bottom of the plastic encapsulation body 101, and the two are pre-installed and fixed using the mounting components. During the installation process, the base plate 2 is pushed and made to abut against the bottom of the plastic encapsulation body 101. After abutting, the two sets of L-shaped clamping plates 304 are pushed in sequence. During the pushing process, through the rotational connection between the mounting bracket 302 and the mounting shaft 303, the L-shaped clamping plates 304 rotate toward the inside of the mounting groove 301 of the plastic encapsulation body 101 and engage and abut, thus completing the installation of the base plate 2 on the plastic encapsulation body 101. After the TVS device is installed, operate the installation component and rotate the installation shaft 303 to disengage the L-shaped clamping plate 304 from the mounting groove 301 of the plastic encapsulation body 101, thereby releasing the locking limit between the base plate 2 and the plastic encapsulation body 101. The base plate 2, together with the correction pressure component, transmission component, linkage component, and telescopic component on it, can be disassembled and removed as a whole. The disassembled base plate 2 and its auxiliary structures can be reused in the assembly of the next TVS device, realizing the reuse of components and effectively reducing assembly auxiliary costs.

[0030] In this solution: a TVS device includes the following steps: Before the formal assembly of the TVS device, the base plate 2 is aligned with the bottom of the plastic package body 101. The mounting components are used to pre-install and fix the two. During the installation process, the base plate 2 is pushed and made to abut against the bottom of the plastic package body 101. After abutting, the two sets of L-shaped clamping plates 304 are pushed in sequence. During the pushing process, the L-shaped clamping plates 304 are rotated towards the inside of the mounting groove 301 of the plastic package body 101 and locked in place through the rotational connection between the mounting bracket 302 and the mounting shaft 303, thus completing the installation of the base plate 2 on the plastic package body 101. During the installation process, the precise installation and positioning of the base plate 2 on the bottom of the plastic package body 101 is achieved by relying on the two sets of symmetrically arranged mounting components, ensuring that the subsequent straightening and pressing structure and the positions of the two side surface-mount electrode pins 102 are aligned. After the base plate 2 is installed, the TVS device is assembled and installed on the circuit board. During the installation process, the plastic package body 101 of the assembled base plate 2 is pushed toward the circuit board, so that the contact parts 1022 of the surface mount electrode pins 102 on both sides contact and adhere to the pads pre-coated with red glue on the circuit board. During the pushing process, the linkage rod 802 at the bottom of the linkage component first abuts against the surface of the circuit board, and then the plastic package body 101... As it continues to move toward the circuit board, the second sleeve 901 and the second slide rod 902 work together to extend and retract the strip plate 801, causing the linkage rod 802 to be forced to move the strip plate 801 toward the bottom plate 2. During the relative contraction of the strip plate 801, the strip plate 801 simultaneously drives the transmission plates 701 on both sides to move. When the transmission plates 701 move, the interaction between the inclined groove 702 and the transmission pin 703 causes the two sets of slide plates 401 to be forced to move. During the forced movement of the slide plates 401, the two sets of slide plates 401 are forced to slide away from each other along the bottom of the bottom plate 2 by means of the sliding assembly composed of the slide groove 601 and the slide rail 602. During the movement of the skateboard 401, the first sleeve 501 and the first slide rod 502 on the elastic component extend and retract, causing the lower pressure plate 402 to move synchronously closer to the patch electrode pin 102. During the movement, the inclined surface 405 on the side of the pressure plate 402 first abuts against the end of the contact part 1022. Blocked by the pin, the pressure plate 402 presses the elastic component in the opposite direction, causing the first slide rod 502 to retract along the first sleeve 501. The first spring 503 is compressed, realizing that the pressure plate 402 retracts towards the skateboard 401 to avoid it. When the pressure plate 402 moves to the contact part 1022... After being directly above, the elastic force of the first spring 503 pushes the pressure plate 402 downward, causing the ball 404 in the spherical groove 403 at the bottom of the pressure plate 402 to press tightly against the upper surface of the bonding part 1022. Utilizing the flexible rotation characteristic of the ball 404, while maintaining continuous pressing force, it does not hinder the subsequent sliding of the slide plate 401 and the pressure plate 402, thereby firmly pressing the bonding part 1022 onto the circuit board pad, strengthening the red glue adhesion effect, and avoiding problems such as loose bonding or lifting of the pins and pads. As the sliding plates 401 continue to slide towards each other, the side-fixed correction rods 406 gradually extend into the inside of the bent portion 1021 of the patch electrode pin 102 and abut against each other. The two sets of symmetrically arranged correction rods 406 push and correct the bent portion 1021 from the inside, limiting the bent portion 1021 from bending inward or outward (see...). Figure 11 Therefore, during the assembly and installation of TVS devices and circuit boards, the pressure plate 402 is used to press and position the contact part 1022 through transmission, ensuring that the pins and pads are fully in contact, improving the reliability of subsequent soldering. Then, the bending part 1021 is corrected by the correction rod 406, preventing the pins from being skewed or bent during the installation and pushing process, ensuring that the pins of the surface mount electrode 102 on both sides always maintain a standard L-shaped shape, and ensuring full contact with the PCB pads after installation. After pin bonding and shape correction are completed, the surface mount electrode pins 102 are soldered to the circuit board pads. By using a combination of red glue pre-adhesion and soldering, the TVS device is firmly fixed to the circuit board. After the soldering process is completed, the mounting assembly is operated, and the mounting shaft 303 is rotated to disengage the L-shaped clamping plate 304 from the mounting groove 301 of the plastic package body 101. The clamping limit between the base plate 2 and the plastic package body 101 is released, and the base plate 2, together with the correction pressure assembly, transmission assembly, linkage assembly and telescopic assembly on it, can be disassembled and removed as a whole. The disassembled base plate 2 and its auxiliary structures can be put into the assembly of the next TVS device, realizing the reuse of components and effectively reducing assembly auxiliary costs.

[0031] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0032] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A TVS device, comprising: A plastic encapsulation body (101) is provided with surface mount electrode pins (102) on both sides. The surface mount electrode pins (102) are arranged in an L-shape and are divided into a bent portion (1021) for connecting with the inside of the plastic encapsulation body (101) and a bonding portion (1022) for bonding with the pads. Its characteristic is that it further includes: The base plate (2) is attached to the bottom of the plastic encapsulation body (101), and an installation component for assisting the mounting of the base plate (2) is provided between the base plate (2) and the plastic encapsulation body (101). The correction pressure assembly is set on the base plate (2). Two sets of the correction pressure assembly are symmetrically arranged on the base plate (2), and the two sets of correction pressure assemblies are used to correct and push the two sets of patch electrode pins (102). In addition, a transmission component for transmitting the correction pressure component is provided on the base plate (2), and a telescopic component for assisting telescopic connection is provided between the transmission component and the base plate (2). A linkage component for linkage during the installation of the patch electrode pin (102) is provided on the telescopic component. Under the combined action of the linkage component, the transmission component and the correction pressure component, the patch electrode pin (102) is anti-bending and corrected for the bonding part (1022) and the bending part (1021) of the patch electrode pin (102) during the installation of the patch electrode pin (102).

2. The TVS device according to claim 1, characterized in that: The corrective pressure assembly includes a slide plate (401), and a sliding assembly for assisting sliding connection is provided between the slide plate (401) and the base plate (2). A pressure plate (402) for pressing against the inner side of the fitting part (1022) is connected to the bottom of the slide plate (401) through an elastic assembly. The bottom of the pressure plate (402) is rotatably connected to multiple sets of ball bearings (404) for assisting pressing through multiple sets of spherical grooves (403). The multiple sets of ball bearings (404) are arranged in a ring array at the bottom of the pressure plate (402). A slope (405) for abutting against the end of the fitting part (1022) is provided on one side of the pressure plate (402). Two sets of corrective rods (406) for abutting against the inner side of the bent part (1021) are fixed symmetrically on one side of the slide plate (401).

3. A TVS device according to claim 2, characterized in that: The elastic component includes multiple sets of first sleeves (501) fixed on the slide plate (401). A first slide rod (502) is slidably connected to the first sleeve (501). One end of the first slide rod (502) is fixed to the pressure plate (402). Each set of first slide rods (502) is arranged in a circular array at the four corners of the pressure plate (402). A first spring (503) is sleeved on the outside of the first sleeve (501). The two ends of the first spring (503) are respectively connected to the slide plate (401) and the pressure plate (402).

4. A TVS device according to claim 3, characterized in that: The sliding assembly includes two sets of symmetrically arranged sliding grooves (601) on the sliding plate (401), and two sets of sliding rails (602) are fixed to the bottom of the base plate (2). The sliding plate (401) is slidably connected to the bottom of the base plate (2) through the cooperation of the two sets of sliding grooves (601) and the sliding rails (602).

5. A TVS device according to claim 2, characterized in that: The transmission components are symmetrically arranged in two sets on both sides of the slide plate (401).

6. A TVS device according to claim 5, characterized in that: The transmission assembly includes a transmission plate (701) disposed on one side of the slide plate (401). The transmission plate (701) has two sets of symmetrically arranged inclined grooves (702). Transmission pins (703) are slidably connected to the inclined grooves (702). One end of each set of transmission pins (703) is fixed to one of the two sets of slide plates (401).

7. A TVS device according to claim 6, characterized in that: The linkage component is disposed between two sets of transmission components. The linkage component includes a strip plate (801), which is fixed between two sets of transmission plates (701). Multiple sets of linkage rods (802) are fixed to the bottom of the strip plate (801).

8. A TVS device according to claim 7, characterized in that: The telescopic assembly includes two sets of second sleeves (901) symmetrically fixed on the base plate (2). A second slide rod (902) is slidably connected to the second sleeve (901). One end of the second slide rod (902) is fixed to the strip plate (801). A second spring (903) is sleeved on the outside of the second sleeve (901). The two ends of the second spring (903) are respectively connected to the base plate (2) and the strip plate (801).

9. A TVS device according to claim 1, characterized in that: The mounting assembly includes mounting slots (301) on both sides of the bottom of the plastic encapsulation body (101), and two sets of mounting brackets (302) are fixed symmetrically on the base plate (2). Mounting shafts (303) are rotatably connected to the mounting brackets (302), and L-shaped clamping plates (304) for mounting with the mounting slots (301) are fixed on the mounting shafts (303).

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