Low-voltage large-current sealing type connector

Abstract

The utility model discloses a low-voltage heavy-current sealing type connector, which relates to the technical field of connectors, and comprises a socket terminal and a socket sheath, the socket terminal is arranged in the socket sheath, the tail part of the socket terminal is provided with a sealing plug arranged in a cavity hole of the socket sheath, the tail part of the socket sheath is provided with a plug cover used for packaging the sealing plug, and the plug cover is provided with a sealing groove. A TPA used for secondary locking of the socket terminal is further arranged in the socket sheath, a plurality of narrow strips are arranged in the socket sheath, the socket sheath is matched with the plug-in end through the narrow strips, and a CPA used for secondary locking of the plug-in end is further arranged on the upper portion of the socket sheath. The socket terminal is installed in the socket sheath and is secondarily locked through the TPA, and the sealing plug and the plug cover are arranged at the tail of the socket terminal so that sealing can be achieved. The plug-in end is matched with the narrow strip on the socket sheath, so that the plug-in end can be prevented from shaking when connected with the socket sheath, and the socket sheath and the plug-in end are secondarily locked through the CPA, so that the reliability of connection between the plug-in end and the socket sheath is further ensured.

Description

Technical Field

[0001] This utility model relates to the field of connector technology, and in particular to a sealed connector. Background Technology

[0002] In certain low-voltage, high-current applications in automotive wet circuits, sealed connectors capable of handling tens to hundreds of amperes are required. Due to the significant Joule heating under high-current conditions, low-voltage, high-current sealed connectors must not only ensure sealing and waterproofing but also possess lower connection resistance, accommodate larger wire diameters, and overcome related issues. These include terminal detachment due to insufficient holding force of the large-diameter terminals within the socket housing, seal failure due to the seal slipping out of the socket housing cavity, and seal failure due to the sealing ring being pulled out of its intended position during connector separation. Existing connector designs also present a dilemma: excessive movement after mating leads to noise, but reducing the mating clearance to decrease movement results in difficulty in mating. Circuit maintainability requires easy disassembly of connector sub-components, but existing sealing cap designs typically lack structural features for disassembly, making cap removal difficult.

[0003] To address the above issues, a low-voltage, high-current sealed connector is proposed. Utility Model Content

[0004] To address the shortcomings in the aforementioned background technology, this utility model proposes a low-voltage, high-current sealed connector, which solves the problem of the difficulty in disassembling the sealing cap in the prior art.

[0005] The technical solution of this utility model is implemented as follows: A low-voltage, high-current sealed connector includes a socket terminal and a socket sleeve. The socket terminal is disposed inside the socket sleeve. The tail of the socket terminal is provided with a sealing plug installed in the cavity of the socket sleeve. The tail of the socket sleeve is provided with a cap for sealing the sealing plug. The socket sleeve is also provided with a TPA for secondary locking of the socket terminal. The socket sleeve is provided with several narrow strips. The socket sleeve cooperates with the mating end through the narrow strips. The upper part of the socket sleeve is also provided with a CPA for secondary locking of the mating end.

[0006] Furthermore, the socket terminal includes a body and a spring plate mounted on the body. The body and the spring plate are connected to form a plug-in part. One end of the plug-in part is provided with a wiring part, and the other end of the plug-in part is provided with a plug-in hole. The plug-in part is symmetrically provided with self-locking thorns and locking protrusions.

[0007] Furthermore, the socket sleeve includes an outer cover, the tail of which is provided with a self-locking hook and a disassembly boss corresponding to the self-locking hook, the lower part of which is provided with an opening, the upper part of which is provided with an elastic self-locking hook, a cavity hole is provided inside the outer cover, the cavity hole is provided with a hanging platform corresponding to the self-locking hook, the outer cover is provided with a groove, the groove is provided with a limiting boss that allows the TPA to switch between the pre-installed position and the final position, and the limiting boss corresponds to the opening.

[0008] Furthermore, the outer cover is also provided with a rectangular outer contour sealing area corresponding to the groove, and a sealing ring that mates with the mating end is provided in the rectangular outer contour sealing area.

[0009] Furthermore, the outer cover is also provided with anti-misalignment groove one and anti-misalignment groove two. Anti-misalignment groove one is matched with the plug-in end, and anti-misalignment groove two is set at the opening and matches with TPA.

[0010] Furthermore, the elastic self-locking nose is provided with a pre-installation mounting plate and a final mounting plate that cooperate with the CPA, and the elastic self-locking nose is also provided with a press-to-unlock part.

[0011] Furthermore, the narrow strip is a wedge-shaped block, which is fixedly connected to the inner wall of the outer cover. The wedge-shaped block is provided with a guide slope for quickly installing the plug end into place and aligning it with the socket sleeve.

[0012] Furthermore, the TPA includes an outer peripheral protrusion frame, the middle of which is provided with an elastic limiting hook that cooperates with the limiting boss, the outer peripheral protrusion frame is provided with a stop boss that cooperates with the locking protrusion, and the outer peripheral protrusion frame is also provided with an anti-misalignment rib corresponding to the second anti-misalignment groove.

[0013] Furthermore, the CPA is provided with elastic hooks corresponding to the pre-installation mounting platform and the final mounting platform, and cantilevered tongues corresponding to the elastic self-locking hook nose. The CPA is also provided with an arc-shaped actuating part and a protrusion for limiting the press-to-unlock part on the elastic self-locking hook nose.

[0014] Furthermore, the plug includes a protective cover, which has a through hole and forms a circular frame opening. The circular frame opening has a clearance notch, and the protective cover also has a gear-shaped stop and a self-locking platform corresponding to the self-locking hook.

[0015] The beneficial effects of this utility model are as follows: The socket terminal of this utility model is installed inside the socket sleeve and locked twice by TPA, and a sealing plug and cap are set at the tail of the socket terminal to achieve a seal. The plug end and the narrow strip on the socket sleeve form a local transition fit in a small strip area, which has a good fixing effect and can prevent shaking when the plug end is connected to the socket sleeve. Furthermore, the socket sleeve and the plug end are locked twice by CPA, which further ensures the reliability of the connection between the plug end and the socket sleeve. Attached Figure Description

[0016] To more clearly illustrate the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 A cross-sectional view of this utility model Figure 1 ;

[0019] Figure 3 A cross-sectional view of this utility model Figure 2 ;

[0020] Figure 4 This is an exploded view of the present invention;

[0021] Figure 5 This is a schematic diagram of the socket terminals;

[0022] Figure 6 This is a front view of the socket housing;

[0023] Figure 7 for Figure 6 Cross-sectional view of AA in the middle;

[0024] Figure 8 for Figure 6 Cross-sectional view of BB in the middle;

[0025] Figure 9 This is a top view of the socket housing;

[0026] Figure 10 This is a bottom view of the socket housing;

[0027] Figure 11 This is a schematic diagram of the installation structure for a narrow strip structure;

[0028] Figure 12 This is a schematic diagram of the TPA structure;

[0029] Figure 13 A schematic diagram of the TPA's pre-installation position;

[0030] Figure 14 This is a schematic diagram of the final installation position of the TPA;

[0031] Figure 15 This is a structural diagram of a CPA;

[0032] Figure 16 A schematic diagram of the pre-installation position for CPA;

[0033] Figure 17 This is a schematic diagram of the final CPA mounting position.

[0034] Figure 18 This is a schematic diagram of the plug structure. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] like Figures 1-4 As shown in Embodiment 1, a low-voltage, high-current sealed connector includes a socket terminal 1 and a socket sleeve 2. The socket terminal 1 is disposed within the socket sleeve 2. A sealing plug 6, installed within a cavity 201 of the socket sleeve 2, is located at the tail of the socket terminal 1. A cap 7, for sealing the sealing plug 6, is located at the tail of the socket sleeve 2. A TPA3, for secondary locking of the socket terminal 1, is also provided within the socket sleeve 2. Several narrow strips 205 are provided within the socket sleeve 2, which mate with a mating end 8 via the narrow strips 205. A CPA4, for secondary locking of the mating end 8, is also provided at the upper part of the socket sleeve 2. In this device, the socket terminal 1 is installed within the socket sleeve 2 and secondary locked by the TPA3, resulting in good fixation. Furthermore, the sealing plug 6 and cap 7 at the tail of the socket terminal 1 ensure a tight seal.

[0037] The plug end 8 and the narrow strip 205 on the socket sleeve 2 cooperate to achieve a good fixing effect, which can prevent the plug end 8 from shaking when connected to the socket sleeve 2. Furthermore, the socket sleeve 2 and the plug end 8 are locked together by CPA4, which further ensures the reliability of the connection between the plug end 8 and the socket sleeve 2.

[0038] The specific assembly process is as follows:

[0039] First, install TPA3 and CPA4 onto the socket sleeve 2 to their pre-installed positions;

[0040] The second step is to pass the plug 7 through the wire and leave it on the wire for later use;

[0041] The third step is to pass the sealing plug 6 through the wire and leave it on the wire for later use;

[0042] The fourth step is to use ultrasonic welding to connect the wire to the wiring part 104 of the socket terminal 1;

[0043] Fifth step, insert the socket terminal 1 into the cavity hole 201 of the socket sleeve 2 until the socket terminal 1 and the cavity hole 201 are self-locked into place in one go;

[0044] The sixth step is to push TPA3 from the pre-installed position to the final position to achieve a secondary locking of the socket terminal 1, preventing the socket terminal 1 from accidentally coming out of the cavity hole 201.

[0045] Step 7: Push the sealing plug 6, which is placed on the wire, into the cavity hole 201 along the wire;

[0046] Step 8: Install the plug 7 left on the wire along the wire to the end of the cavity 201 and lock it with the self-locking hook on the outer wall of the end of the cavity 201 to prevent the sealing plug 6 from sliding out of the cavity 201 along the wire and causing the seal to fail.

[0047] The disassembly process of each sub-component of the low-voltage, high-current sealed connector is the reverse of the above-described sequence.

[0048] The process of connecting the low-voltage, high-current sealed connector to the mating end 8 is as follows: Before mating, CPA4 is in the pre-installed position. After mating, based on the initial locking of the resilient self-locking lug 207 of the socket sleeve 2 and the self-locking mounting plate 801 of the mating end 8, CPA4 is pushed from the pre-installed position to the final position to achieve a secondary locking of the resilient self-locking lug 207 of the socket sleeve 2, preventing accidental separation of the connector from the mating end 8. The separation process of the low-voltage, high-current sealed connector from the mating end 8 is the reverse of the above operation sequence.

[0049] like Figure 5 As shown, in this embodiment, the socket terminal 1 includes a main body 101 and a spring 102 mounted on the main body 101. The main body 101 and the spring 102 are connected to form a plug-in portion 103. One end of the plug-in portion 103 is provided with a wiring portion 104, and the other end of the plug-in portion 103 is provided with a plug-in hole 105. The plug-in portion 103 is symmetrically provided with self-locking spikes 106 and locking protrusions 107. The self-locking spikes 106 and locking protrusions 107 on the socket terminal 1 are used to fix the socket terminal 1 inside the socket sleeve 2, realizing the fixed connection between the socket terminal 1 and the socket sleeve 2. The plug-in portion 103 is connected to the mating end 8 through the plug-in hole 105, and the wiring portion 104 is connected to the wire.

[0050] Specifically, the socket terminal 1 is a sub-part responsible for electrical contact, composed of two parts: a main body 101 of different thicknesses and a spring 102. The main body 101 is made of a highly conductive copper alloy, while the spring 102 is made of a copper alloy that combines high conductivity and high elasticity. The socket terminal 1 can be functionally divided into a plug-in part 103 and a wiring part 104. The plug-in hole 105 of the plug-in part 103 is plugged into the pin 803 of the plug-in end 8, and the wiring part 104 is ultrasonically welded to the wire. The self-locking protrusions 106 symmetrically arranged on the spring 102 of the socket terminal 1 form a stop with the mounting platform 202 inside the cavity hole 201 of the socket sleeve 2, providing a primary locking function. The secondary locking protrusions 107 symmetrically arranged on the main body 101 of the socket terminal 1 form a stop with the TPA3 located at the final position, providing a secondary locking function and solving the problem of terminal detachment caused by insufficient holding force in the socket sleeve for terminals with large wire diameters.

[0051] like Figures 5-11 As shown in Embodiment 2, a low-voltage, high-current sealed connector is provided. The socket sleeve 2 includes an outer cover 204. The tail of the outer cover 204 is provided with a self-locking hook 212 and a disassembly boss 203 corresponding to the self-locking hook 212. The outer wall of the tail end of the cavity hole 201 is symmetrically provided with disassembly bosses 203 for disassembling the plug 7. The disassembly bosses 203 can be used as fulcrums to insert a pry bar under the plug 7 to lift the self-locking bracket 703 of the plug 7 to release the lock, which facilitates the disassembly of the plug 7 and improves maintainability. The lower part of the outer cover 204 has an opening 208, and the upper part of the outer cover 204 has an elastic self-locking hook 207. The cavity hole 201 is set inside the outer cover 204, and the cavity hole 201 has a mounting platform 202 corresponding to the self-locking thorn 106. The mounting platform 202 and the self-locking thorn 106 cooperate to form a stop. The outer cover 204 also has a groove 209, and the groove 209 has a limiting boss 210 that allows the TPA3 to switch between the pre-installed position and the final position. The limiting boss 210 corresponds to the opening 208. The limiting boss 210 is symmetrically provided in the groove 209 at the first end of the cavity hole 201 for attaching the elastic hook 301 of the TPA3 to prevent it from falling off easily and to allow the TPA3 to switch between the pre-installed position and the final position. TPA3 is installed on the limiting boss 210 through the opening 208. After the socket terminal 1 is installed in the cavity hole 201, TPA3 is positioned behind the two locking protrusions 107 and fixes the socket terminal 1 in the cavity hole 201. The smooth inner cylindrical surface 211 of the inner wall of the tail end of the cavity hole 201 is interference-fitted with the sealing plug 6 around its circumference to achieve a seal. The outer wall of the tail end of the cavity hole 201 is symmetrically provided with self-locking hooks 212, which are used to lock the plug 7 in place and block the sealing plug 6 to prevent the sealing plug 6 from falling out of the cavity hole 201 and causing the seal to fail.

[0052] Specifically, the socket sleeve 2 is made of engineering plastic, and its main function is to insulate, protect, and fix the socket terminal 1, and to engage and lock with the mating terminal 8. Symmetrical mounting platforms 202 are provided within the cavity 201 of the socket sleeve 2. These mounting platforms 202, through self-locking engagement, lock the self-locking spikes 106 of the socket terminal 1 into the cavity 201 of the socket sleeve 2. The outer cover 204 of the socket sleeve 2 and the outer wall of the first end of the cavity 201 have openings 208 for accommodating the TPA3. The socket sleeve 2 is provided with a flexible self-locking lug 207. This flexible self-locking lug 207 achieves a one-time locking by engaging with the self-locking mounting platform 801 of the mating terminal 8, preventing the socket sleeve 2 from separating from the mating terminal 8. Only after the connector and mating end 8 are mated and locked in place can the mating end 8 lift the cantilever tongue 402 of CPA4 until it passes the highest point of the elastic self-locking nose 207, thereby eliminating the unidirectional limitation that hinders the movement of CPA4 towards the final position. At this point, CPA4 can be pushed from the pre-installed position to the final position, allowing the final position mounting platform 217 of the socket sleeve 2 to engage with the elastic hook 401 of CPA4, achieving bidirectional limitation of the final position of CPA4. During the process of CPA4 moving from the pre-installed position to the final position, the symmetrically arranged protrusions 403 at one end of CPA4 enter the space below the press-to-unlock part 215 of the elastic self-locking nose 207, preventing the press-to-unlock part 215 from being pressed down to unlock. Therefore, based on the above-mentioned first locking, a second locking of the elastic self-locking nose 207 is achieved, preventing the connector from accidentally separating from the mating end 8. The mating end is a board-end plug connector, including pins 803 and a plug sleeve 804. The self-locking mounting plate 801 and the flexible self-locking hook 207 work together to achieve locking upon insertion.

[0053] In this embodiment, the outer cover 204 is further provided with a rectangular outer contour sealing area 213 corresponding to the groove 209, and a sealing ring 5 that mates with the mating end 8 is provided in the rectangular outer contour sealing area 213. The sealing ring 5 is used to seal the mating end 8 to the outer cover 204. In the outer cover 204 of the socket sleeve 2, the root of the two cavity holes 201 is a rectangular outer contour sealing area 213 with rounded corners. This rectangular outer contour sealing area 213 is press-fitted with the inner sealing lip 501 of the sealing ring 5 to achieve a seal between the sealing ring 5 and the socket sleeve 2.

[0054] Specifically, the sealing ring 5 is made of elastic rubber material and has a rectangular structure with rounded corners. Both the inner and outer rings have three inner sealing lips 501 and three outer sealing lips 502. The inner sealing lips 501 are fully interference-fitted with the rectangular outer contour sealing area 213 of the socket sleeve 2 to achieve a seal between the sealing ring 5 and the socket sleeve 2. The outer sealing lips 502 are fully interference-fitted with the inner surface 802 of the cover of the mating end 8 to achieve a seal between the sealing ring 5 and the mating end 8.

[0055] In this embodiment, the outer cover 204 is further provided with a first anti-misalignment groove 214 and a second anti-misalignment groove 218. The first anti-misalignment groove 214 cooperates with the mating end 8, and the second anti-misalignment groove 218 is located at the opening 208 and cooperates with the TPA3. The first anti-misalignment groove 214 is used to ensure the accuracy of the installation between the mating end 8 and the outer cover 204 and avoid misalignment; the second anti-misalignment groove 218 is used to ensure the accuracy of the installation position of the TPA3 and avoid reverse insertion.

[0056] Specifically, the inner surface of the outer cover 204 of the socket sleeve 2 is provided with an anti-misalignment groove 214. The anti-misalignment groove 214 can be set in different positions, but it corresponds to the position of the anti-misalignment rib of the mating end 8, so as to prevent connectors that do not belong to the same circuit from being incorrectly mated to the mating end.

[0057] In this embodiment, the elastic self-locking nose 207 is provided with a pre-installation mounting plate 216 and a final mounting plate 217 that cooperate with CPA4, and the elastic self-locking nose 207 is also provided with a press-to-unlock part 215 for unlocking the CPA4 from its locked state.

[0058] Specifically, the socket sleeve 2 is provided with a pre-installation position bracket 216 and a final position bracket 217 for limiting the position of CPA4. After the pre-installation position bracket 216 of the socket sleeve 2 is engaged with the elastic hook 401 of CPA4, it forms a bidirectional limit on CPA4. At the same time, the elastic self-locking lug 207 of the socket sleeve 2 forms a unidirectional limit on the cantilever spring 402 of CPA4, which hinders the movement of CPA4 towards the final position. This significantly increases the force required for CPA4 to move from the pre-installation position to the final position, preventing CPA4 from accidentally entering the final position from the pre-installation position before insertion.

[0059] In this embodiment, the narrow strip 205 is a wedge-shaped block. The wedge-shaped block is disposed on the inner wall of the outer cover 204 and is an integral structure of the outer cover. The wedge-shaped block is provided with a guide slope 206 for quickly installing the plug end 8 into place and aligning it with the socket sleeve.

[0060] Specifically, the large gap between the inner surface of the outer cover 204 of the socket sleeve 2 and the mating end 8 after mating easily causes shaking and abnormal noise. However, reducing the mating gap to reduce shaking results in increased mating force, leading to mating difficulties, creating a dilemma. To solve this problem, the inner surface of the outer cover 204 of the socket sleeve 2 is provided with several protruding narrow strips 205. The narrow strips 205 have guide slopes 206. In the initial stage of mating, the guide slopes 206 maintain a large mating gap. In the later stage of mating, the narrow strips 205 and the mating end 8 form a small strip-shaped area for local transition mating, which eliminates shaking without significantly increasing the mating force. This solves the dilemma of large shaking after the connector is mated with the mating end, which causes abnormal noise, but reducing the mating gap to reduce shaking leads to mating difficulties.

[0061] All other structures are the same as in Example 1.

[0062] As shown in Figure 12~ Figure 18 As shown in Embodiment 3, a low-voltage, high-current sealed connector, the TPA3 includes an outer peripheral protrusion frame 305, the middle of the outer peripheral protrusion frame 305 is provided with an elastic limiting hook 301 that cooperates with the limiting boss 210, the outer peripheral protrusion frame 305 is provided with a stop boss 303 that cooperates with the locking protrusion 107, and the outer peripheral protrusion frame 305 is also provided with an anti-misalignment rib 302 corresponding to the anti-misalignment groove 218.

[0063] Specifically, the TPA clip 3 is injection molded and has an overall "mountain" shape. Its main function is to provide secondary locking for the socket terminal 1 installed in the cavity 201 of the socket sleeve 2, increasing the holding force of the socket terminal 1 in the socket sleeve 2 and solving the problem of terminal detachment caused by insufficient holding force for terminals with large wire diameters in the socket sleeve. The TPA3 also blocks the sealing ring 5, solving the problem of sealing ring 5 being pulled out of its predetermined position by the plug sleeve 804 when the connector is separated, which leads to sealing failure. When installing the TPA3 on the socket sleeve 2, it first passes through the outer cover 204 of the socket sleeve 2 along the opening 208 that accommodates the TPA3, and then passes through the cavity 201 to be inserted into the socket sleeve 2. The installation anti-misalignment rib 302 of the TPA3 cooperates with the anti-misalignment groove 218 to ensure the uniqueness of the installation position of the TPA3. TPA3 is symmetrically equipped with elastic limiting hooks 301 for engaging with limiting protrusions 210 on the socket sleeve 2 to prevent TPA3 from easily falling off and to allow TPA3 to switch between pre-installed and final positions. In the pre-installed position, the socket terminal 1 can be smoothly inserted into the cavity hole 201 of the socket sleeve 2 without being obstructed by TPA3. After the socket terminal 1 is installed in the cavity hole 201 of the socket sleeve 2, TPA3 is pushed to the final position. At this time, the secondary locking protrusion 107 of the socket terminal 1 is blocked by the blocking protrusion 303 of the TPA3 installed in the final position. Based on the primary locking of the terminal protrusion and the cavity mounting platform, this further increases the holding force of the socket terminal 1 in the socket sleeve 2, avoiding the problem of terminal detachment caused by insufficient holding force in the socket sleeve 2 for socket terminals 1 with large wire diameters. The protruding portion 305 on the outer periphery of TPA3 acts as a stop for the sealing ring 5, preventing the sealing ring 5 from being pulled out of its predetermined position by the plug sheath 804 when the connector is separated, thus preventing sealing failure. TPA3 is provided with a disassembly groove 304 for easy disassembly of TPA3 during maintenance and repair.

[0064] In this embodiment, the CPA4 is provided with an elastic hook 401 corresponding to the pre-installation mounting plate 216 and the final mounting plate 217, and a cantilever spring 402 corresponding to the elastic self-locking hook nose 207. The CPA4 is also provided with an arc-shaped toggle part 404 and a protrusion 403 for limiting the press-to-unlock part 215 on the elastic self-locking hook nose 207.

[0065] Specifically, the CPA clip 4 is injection molded, and its main function is to stop the pressing and unlocking part 215 of the elastic self-locking lug 207, and to form a secondary lock for the mating connection of the connector, thereby improving the reliability of the connection. The CPA4 cooperates with the elastic self-locking lug 207 of the socket sleeve 2. There is a triangular or trapezoidal elastic hook 401 on each side of the CPA4, which is used for pre-installation position limit and final position limit. When the CPA4 is installed, it first enters and locks in the pre-installation position. During the process of entering the pre-installation position, the interference fit between the triangular or trapezoidal elastic hook 401 and the pre-installation position mounting plate 216 causes the elastic hook to be compressed and deformed. At the moment the pre-installation position is locked in place, the triangular or trapezoidal elastic hook 401 springs back to its original shape. At this time, the cantilever tongue 402 at the front end of the CPA4 presses against the elastic self-locking lug 207 of the sleeve, so that the component is limited by a large force when moving forward and backward, and the CPA4 is thus locked in the pre-installation position. CPA4 provides the operator with a "click" sound and tactile feedback the moment it locks in the pre-installation position, indicating that it has been installed in the pre-installation position and preventing the component from falling off due to improper installation. At this time, CPA4 does not affect the connector's mating, first-time self-locking, or unlocking. The cantilever spring 402 of CPA4 extends from one end to the other for pre-installation position limiting. After the connector is mated and locked in place by the first self-locking, the cantilever spring 402 of CPA4 is lifted by the self-locking bracket 801 of the mating end 8 until it is above the highest point of the elastic self-locking lug 207 of the socket sleeve 2, allowing CPA4 to continue forward to the final position beyond the pre-installation position. If the connector is not properly mated with the mating end 8, the cantilever spring 402 of CPA4 will not be lifted by the mating end, and CPA4 will still be blocked by the elastic self-locking lug 207 of the socket sleeve 2, preventing it from being installed forward to the final position or requiring abnormally large force. This strongly reminds the operator to check and eliminate the assembly error of improper mating. After eliminating the possible assembly errors mentioned above, CPA4 can be locked from the pre-installed position to the final position. At this time, the protrusions 403 symmetrically arranged at one end of CPA4 enter the space below the press-to-unlock part 215 of the elastic self-locking nose 207, preventing the press-to-unlock part 215 from being pressed to unlock. Therefore, a secondary locking of the elastic self-locking nose 207 is achieved on the basis of the first locking, preventing the connector from accidentally separating from the mating end 8. To improve maintainability and facilitate disassembly, an arc-shaped toggle part 404 conforming to the shape of a fingertip is provided on the top of CPA4, allowing direct finger movement to switch between the pre-installed and final positions and to disassemble the component.

[0066] In this embodiment, the plug 7 includes a protective cover 701, which has a through hole 705 and forms a circular frame opening. The circular frame opening has a clearance notch 702. The protective cover 701 also has a gear-shaped stop 704 and a self-locking platform 703 corresponding to the self-locking hook 212.

[0067] Specifically, the sealing plug 6 is made of elastic rubber material and is a hollow cylinder. It has three inner sealing ribs 601 and three outer sealing ribs 602 arranged on both the inner and outer rings. The inner sealing ribs 601 are press-fitted with the wire around its circumference to achieve a seal between the sealing plug 6 and the wire. The outer sealing ribs 602 are press-fitted with the smooth inner cylindrical surface 211 of the inner wall of the cavity 201 of the socket sleeve 2 around its circumference to achieve a seal between the sealing plug 6 and the socket sleeve 2. Small arc-shaped protrusions 603 are provided on both ends of the sealing plug 6 to prevent them from sticking together in automated assembly scenarios.

[0068] Specifically, the plug 7 is injection molded, and its main function is to limit the sealing plug 6, preventing the sealing plug 6 from slipping off the wire and falling out of the socket housing cavity 201, thus preventing sealing failure. It also reduces the adverse effects of external swaying of large-diameter wires on the uniform interference fit of the sealing plug 6 within the cavity 201. The circular frame opening 701 of the plug 7 has a clearance notch 702, allowing adjacent plugs 7 to avoid interference. Symmetrically arranged self-locking brackets 703 on the cover 701 of the plug 7 engage with the self-locking hooks 212 on the outer wall of the cavity 201, locking them in place. The plug 7 has a gear-shaped stop 704, which engages with the sealing plug 6 to prevent it from falling out of the cavity 201 and causing sealing failure. The through hole 705 of the plug 7 has a micro-clearance fit with the outer diameter of the wire, reducing the adverse effects of external swaying of the wire on the uniform interference fit of the sealing plug 6 within the cavity 201.

[0069] All other structures are the same as in Example 2.

[0070] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low voltage, high current, sealed connector characterized by, The socket terminal (1) and the socket sheath (2) are included, the socket terminal (1) is arranged in the socket sheath (2), the tail of the socket terminal (1) is provided with a sealing plug (6) installed in the cavity hole (201) of the socket sheath (2), the tail of the socket sheath (2) is provided with a plug cover (7) for packaging the sealing plug (6), the socket sheath (2) is further provided with a TPA (3) for secondary locking the socket terminal (1), the socket sheath (2) is provided with a plurality of narrow strips (205), the socket sheath (2) is matched with the opposite plug end (8) through the narrow strips (205), and the upper portion of the socket sheath (2) is further provided with a CPA (4) for secondary locking the opposite plug end (8).

2. The low-voltage high-current sealed connector according to claim 1, wherein The socket terminal (1) includes a main body (101) and a spring piece (102) installed on the main body (101), the main body (101) is connected with the spring piece (102) to form a plug-in part (103), one end of the plug-in part (103) is provided with a wiring part (104), the other end of the plug-in part (103) is provided with a plug-in hole (105), and the plug-in part (103) is symmetrically provided with a self-locking pick (106) and a locking protrusion (107).

3. The low voltage high current sealed connector of claim 2, wherein, The socket sheath (2) includes an outer cover (204), the tail of the outer cover (204) is provided with a self-locking hook (212) and a dismounting boss (203) corresponding to the self-locking hook (212), the lower portion of the outer cover (204) is provided with an opening (208), the upper portion of the outer cover (204) is provided with an elastic self-locking hanging nose (207), the cavity hole (201) is arranged in the outer cover (204), the cavity hole (201) is provided with a hanging table (202) corresponding to the self-locking pick (106), the outer cover (204) is provided with a groove (209), the groove (209) is provided with a limiting boss (210) for switching the TPA (3) between a preloading position and a final position, and the limiting boss (210) corresponds to the opening (208).

4. The low voltage high current sealed connector of claim 3, wherein, The outer cover (204) is further provided with a rectangular outer contour surface sealing area (213) corresponding to the groove (209), and the rectangular outer contour surface sealing area (213) is provided with a sealing ring (5) matched with the opposite plug end (8).

5. The low-voltage high-current sealed connector according to claim 3 or 4, characterized in that, The outer cover (204) is further provided with a mistake prevention groove one (214) and a mistake prevention groove two (218), the mistake prevention groove one (214) is matched with the opposite plug end (8), and the mistake prevention groove two (218) is arranged at the opening (208) and matched with the TPA (3).

6. The low voltage high current sealed connector of claim 5, wherein, The elastic self-locking hanging nose (207) is provided with a preloading position hanging table (216) and a final position hanging table (217) matched with the CPA (4), and the elastic self-locking hanging nose (207) is further provided with a pressing unlocking part (215).

7. The low voltage high current sealed connector of claim 6, wherein, The narrow strip (205) is a wedge-shaped block, the wedge-shaped block is fixedly connected to the inner wall of the outer cover (204), and the wedge-shaped block is provided with a guide inclined surface (206) for quickly installing the opposite plug end (8) in place and centering with the socket sheath (2).

8. The low voltage high current sealed connector of claim 7, wherein, The TPA (3) comprises a peripheral protruding frame (305), the middle part of the peripheral protruding frame (305) is provided with an elastic limiting hook (301) matched with the limiting boss (210), the inside of the peripheral protruding frame (305) is provided with a stop boss (303) matched with the locking protrusion (107), and the peripheral protruding frame (305) is further provided with an error prevention rib (302) corresponding to the error prevention groove two (218).

9. The low voltage high current sealed connector of any of claims 6-8, wherein, The CPA (4) is provided with an elastic hook (401) corresponding to the pre-position hook (216) and the final-position hook (217) and a cantilever elastic tongue (402) corresponding to the elastic self-locking hook (207), and the CPA (4) is further provided with an arc-shaped pushing part (404) and a protrusion (403) for limiting the pressing unlocking part (215) on the elastic self-locking hook (207).

10. The low voltage high current sealed connector of claim 9, wherein, The plug cover (7) comprises a protective cover (701), the protective cover (701) is provided with a through hole (705) and forms a circular frame opening, the circular frame opening is provided with an empty space gap (702), and the protective cover (701) is further provided with a gear-shaped stop part (704) and a self-locking hook (703) corresponding to the self-locking hook (212).

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