A method for assembling a multi-cavity connector

Abstract

The present invention discloses an assembly method of a multi-cavity connector, which comprises the following steps: installing a TPA lock on a plastic sheath, wherein a buckle arm at the lower end of the TPA lock is first clamped and positioned with a first locking hole on the plastic sheath, at which time, avoidance grooves arranged on both sides of a first lock body of the TPA lock correspond to the cavities arranged on the plastic sheath and do not block the cavities; then, a plurality of conductor components are inserted into the cavities of the plastic sheath one by one, the conductor components smoothly pass through the avoidance grooves of the first lock body and are inserted into place, and when the conductor components are inserted into place, an elastic locking arm in the cavity is buckled into one side of the locking groove on the conductor component to lock the conductor component once; finally, the TPA lock is pressed down, so that the buckle arm at the lower end of the TPA lock leaves the first locking hole and is clamped and positioned with a second locking hole on the plastic sheath, at which time, the locking parts arranged on the upper side of the avoidance groove in the first lock body enter the cavity and are pressed into the locking groove to simultaneously lock two adjacent rows of conductor components for secondary locking.

Description

Technical field:

[0001] The invention relates to the technical field of connector products, and in particular to an assembling method of a multi-cavity connector. Background technology:

[0002] A connector (also often called a circuit connector or electrical connector) is a conductor component device that bridges two conductor components on a loop so that current or signal can flow from one conductor component to another conductor component.

[0003] According to the UACAR (United States Council of Automotive Research) standard, the matching of the terminal and the plastic shell in the connector must have a primary lock and a secondary lock. The primary lock ensures that the connector is easy to assemble and lock at the first level, and the secondary lock ensures that the connector terminal can withstand the tensile force that meets the corresponding standards, ensuring the relative position and usage strength of the terminal inside the connector.

[0004] Patent application No. 202111276353.0 discloses a locking structure for a mini FAKRA terminal, which includes: a housing, on which a cantilever elastic structure is provided for primary locking of a terminal assembly component inserted into the housing; and a locking plate, which is mounted on the housing for secondary locking of a terminal assembly component inserted into the housing. This patent application is intended to provide a connector terminal locking structure with higher strength and a more reliable locking structure, and to add an anti-mistouch design to the connector unlocking structure, thereby making the MINI FAKRA connector safer, more reliable, more compact, relatively small in footprint, and lower in manufacturing cost.

[0005] However, the number of the above-mentioned terminal assembly components is four, which are arranged in two rows, two in each row, that is, in a field shape. Figure 7 As shown, since each locking piece can only lock two terminal assembly components once, the four terminal assembly components need to be locked twice using two locking pieces. The number of parts is relatively large, the assembly is not convenient, and the efficiency is not high.

[0006] In view of this, the inventor proposes the following technical solution. Summary of the invention:

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art and provide an assembling method of a multi-cavity connector.

[0008] In order to solve the above technical problems, the present invention adopts the following technical solutions: the assembly method of the multi-cavity connector is as follows: the TPA lock is installed on the plastic sheath, and the buckle arm at the lower end of the TPA lock is first clamped and positioned with the first locking hole on the plastic sheath. At this time, the avoidance grooves set on both sides of the first lock body of the TPA lock correspond to the cavities set in the plastic sheath and do not block the cavities; then, multiple conductor components are inserted into the cavities of the plastic sheath one by one, and the conductor components pass through the avoidance grooves of the first lock body smoothly. And inserted into place, and when the conductor assembly is inserted into place, the elastic locking arm in the cavity is buckled into one side of the locking groove on the conductor assembly to lock the conductor assembly once, and position the conductor assembly in the cavity; finally, the TPA lock is pressed down, so that the buckle arm at the lower end of the TPA lock leaves the first locking hole and is clamped and positioned with the second locking hole on the plastic sheath. At this time, the locking parts arranged on the upper side of the avoidance groove in the first lock body enter the cavity and are pressed into the other side of the locking groove to simultaneously lock the two adjacent rows of conductor assemblies for secondary locking.

[0009] Further, in the above technical solution, the plastic sheath is provided with at least two rows of longitudinally distributed cavity groups, and each cavity group includes at least two transversely distributed cavities, and each cavity is equipped with a conductor assembly; the TPA lock includes a TPA lock seat and at least one first lock body formed at the lower end of the TPA lock seat and used to simultaneously lock two adjacent columns of conductor assemblies and two buckle arms formed on both sides of the lower end of the TPA lock seat, and the plastic sheath is provided with a first locking hole and a second locking hole that are adapted to the buckle arms and are distributed in upper and lower layers; when the buckle arm is clamped and positioned with the first locking hole, the avoidance grooves provided on both sides of the first lock body correspond to the cavity and do not block the cavity; when the buckle arm is pressed down to be clamped and positioned with the second locking hole, the locking portion provided on the upper side of the avoidance groove in the first lock body enters the cavity and is pressed into the locking groove to lock the conductor assembly.

[0010] Furthermore, in the above technical solution, the first lock body is provided with a plurality of hollow grooves for increasing the elasticity of the lock portion; and the lock portion has an arc-shaped notch.

[0011] Furthermore, in the above technical solution, the avoidance groove includes at least two first avoidance grooves formed on one side of the first lock body and distributed longitudinally and at least two second avoidance grooves formed on the other side of the first lock body and distributed longitudinally, and the locking part includes a first locking part arranged on the upper side of the first avoidance groove and a second locking part arranged on the upper side of the second avoidance groove.

[0012] Furthermore, in the above technical solution, the plastic sheath is provided with an insertion groove for installing the TPA lock piece along its upper end downward, and the insertion groove passes through each of the cavities and the first locking hole and the second locking hole.

[0013] Furthermore, in the above technical scheme, each cavity group includes three laterally distributed cavities, and the first elastic locking arm located at the upper / lower diagonal of the cavity in the middle row is extended from front to rear, and the end of the first elastic locking arm is formed with a locking groove for clamping the conductor assembly to pull the first barb of the conductor assembly; the second elastic locking arm in the two columns of cavities on both sides is extended from back to front, and the second elastic locking arm and the first elastic locking arm constitute the elastic locking arm.

[0014] Furthermore, in the above technical solution, the first elastic locking arms located at the cavities in the middle row are distributed in a mirror-symmetrical manner.

[0015] Furthermore, in the above technical solution, the longitudinal section of the first barb is arc-shaped, and the first barb has a first guide slope; the end of the second elastic locking arm is formed with a locking groove for clamping the conductor assembly to support the pressing part of the conductor assembly, the longitudinal section of the pressing part is arc-shaped, and the pressing part has a second guide slope.

[0016] Furthermore, in the above technical solution, the TPA lock also includes a second lock body formed at the lower end of the TPA lock seat and used to simultaneously lock a row of conductor components, and at least two third avoidance grooves distributed longitudinally are arranged on one side of the second lock body, and a third locking portion is arranged on the upper side of the third avoidance groove; the other side of the second lock body is not provided with an avoidance groove and a locking portion to form an avoidance surface, and the avoidance surface is close to the first elastic locking arm.

[0017] Furthermore, in the above technical solution, the conductor assembly is provided with an insertion stopper protruding outward, and the insertion stopper abuts against the step groove in the cavity.

[0018] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: the present invention adopts a TPA lock to realize secondary locking of all conductor components, and the number of TPA locks used is very small, which can not only reduce the number of parts, but also improve assembly efficiency, and the cost will be relatively low, which can improve market competitiveness. In addition, when the TPA lock is assembled, the buckle arm at its lower end is first clamped and positioned with the first locking hole on the plastic sheath to achieve the purpose of pre-installing the TPA lock, and after the conductor components are assembled one by one in the cavity of the plastic sheath, the TPA lock is directly pressed down, so that the locking part of the first lock body can enter the cavity and press into the locking groove to lock the conductor component, and its installation is more convenient, and the TPA lock can quickly lock the conductor component, and its assembly efficiency is higher. At the same time, the buckle arm of the TPA lock leaves the first locking hole and is clamped and positioned with the second locking hole on the plastic sheath, ensuring that the TPA lock is stably installed on the plastic sheath, thereby ensuring the quality of the entire multi-cavity connector. Description of the drawings:

[0019] Figure 1 is a step diagram of the present invention;

[0020] Figure 2 is a stereoscopic view of a multi-cavity connector assembled according to the present invention;

[0021] Figure 3 is a cross-sectional view of a multi-cavity connector assembled according to the present invention from a first viewing angle;

[0022] Figure 4 It is a three-dimensional exploded view of the multi-cavity connector assembled by the present invention;

[0023] Figure 5 is a cross-sectional view of the multi-cavity connector assembled according to the present invention from a second viewing angle;

[0024] Figure 6 is a three-dimensional diagram of the plastic sheath of the present invention;

[0025] Figure 7 is a cross-sectional view of the TPA lock of the present invention;

[0026] Figure 8 It is a three-dimensional diagram of the TPA lock in the present invention. Specific implementation method:

[0027] The present invention is further described below in conjunction with specific embodiments and drawings.

[0028] See Figure 1-8 As shown, a multi-cavity connector is provided. The assembly method of the multi-cavity connector is as follows: a TPA lock 3 is installed on a plastic sheath 1, and the buckle arm 33 at the lower end of the TPA lock 3 is first clamped and positioned with the first locking hole 12 on the plastic sheath 1. At this time, the avoidance grooves provided on both sides of the first lock body 32 of the TPA lock 3 correspond to the cavity 11 provided on the plastic sheath 1, and do not block the cavity 11, that is, do not affect the normal assembly of the conductor component 2 and the cavity 11; then, a plurality of conductor components 2 are inserted into the cavity 11 of the plastic sheath 1 one by one, and the conductor components 2 pass through the avoidance grooves of the first lock body 32 smoothly and are inserted into place, and when the conductor components 2 are inserted into place, The elastic locking arm in the cavity 11 is buckled into one side of the locking groove 21 on the conductor component 2 to lock the conductor component 2 once and position the conductor component 2 in the cavity 11; finally, the TPA lock 3 is pressed down to make the buckle arm 33 at the lower end of the TPA lock 3 leave the first locking hole 12 and be clamped and positioned with the second locking hole 13 on the plastic sheath 1. At this time, the locking part arranged on the upper side of the avoidance groove in the first lock body 32 enters the cavity 11 and is pressed into the other side of the locking groove 21 to simultaneously lock the two adjacent rows of conductor components 2 for secondary locking, thereby ensuring that the conductor component 2 can withstand the tensile force that meets the corresponding standards and ensure the relative position and usage strength inside the conductor component 2 to prevent pulling off.

[0029] That is to say, the present invention uses a TPA lock 3 to achieve secondary locking of all conductor components (which can be 4, 6, 8, etc.), and the number of TPA locks 3 used is very small, which can not only reduce the number of parts, but also improve assembly efficiency, and the cost will be relatively low, which can improve market competitiveness. In addition, when the TPA lock 3 is assembled, the buckle arm 33 at its lower end is first clamped and positioned with the first locking hole 12 on the plastic sheath 1 to achieve the purpose of pre-installing the TPA lock 3, and after the conductor components 2 are assembled one by one in the cavity 11 of the plastic sheath 1, the TPA lock 3 is directly pressed down, so that the locking part of the first lock body 32 can enter the cavity 11 and press into the locking groove 21 to lock the conductor component 2, and its installation is more convenient, and the TPA lock 3 can quickly lock the conductor component 2, and its assembly efficiency is higher. At the same time, the latch arm of the TPA lock leaves the first locking hole and is locked and positioned with the second locking hole on the plastic sheath, ensuring that the TPA lock is stably installed on the plastic sheath, thereby ensuring the quality of the entire multi-cavity connector.

[0030] The structure of the multi-cavity connector is described in detail below.

[0031] The multi-cavity connector includes a plastic sheath 1 and a plurality of conductor components 2 (ie, terminal components). A wire 20 is connected to the rear end of each conductor component 2. The conductor component 2 is fixedly mounted in the plastic sheath 1, and the wire 20 extends out of the plastic sheath 1.

[0032] Among them, the plastic sheath 1 is provided with at least two rows of longitudinally distributed cavity groups, and each cavity group includes at least two transversely distributed cavities 11, and each cavity 11 is equipped with a conductor component 2, that is, all cavities 11 are distributed in an array manner, and correspondingly, after the conductor component 2 is loaded into the cavity 11, all conductor components 2 are also distributed in an array manner, such as 2*2, 2*3, 2*4, 3*2, 3*3, 3*4 arrays, etc.

[0033] In order to ensure that the conductor component 2 is stably assembled in the plastic sheath 1, the following design is made: a locking groove 21 is provided on the outside of the conductor component 2, and the cavity 11 has an elastic locking arm, and the end of the elastic locking arm is buckled into one side of the locking groove 21 of the conductor component 2 to lock the conductor component 2 once, and a TPA lock 3 is installed on the outside of the plastic sheath 1. The TPA lock 3 is partially pressed into the other side of the locking groove 21 of the conductor component 2 to lock the conductor component 2 for a second time. The secondary locking ensures that the conductor component 2 can withstand the tensile force that meets the corresponding standards, ensures the relative position and usage strength of the conductor component 2 in the plastic sheath 1, and thus ensures the quality and service life of the entire product.

[0034] When the present invention adopts: the plastic sheath 1 is provided with two rows of longitudinally distributed cavity groups, and each cavity group includes two transversely distributed cavities 11, that is, the four cavities 11 are arranged in a 2*2 array, and the four conductor components 2 are also arranged in a 2*2 array.

[0035] The present invention uses a TPA lock 3 to achieve secondary locking of all conductor components 2. The specific structure is as follows:

[0036] The TPA lock 3 includes a TPA lock seat 31 and at least one first lock body 32 formed at the lower end of the TPA lock seat 31 and used to simultaneously lock two adjacent rows of conductor components 2, and two buckle arms 33 formed on both sides of the lower end of the TPA lock seat 31. The plastic sheath 1 is provided with a first locking hole 12 and a second locking hole 13 that are adapted to the buckle arms 33 and are distributed in upper and lower layers; when the buckle arms 33 are clamped and positioned with the first locking hole 12, the avoidance grooves provided on both sides of the first lock body 32 correspond to the cavity and do not block the cavity 11; when the buckle arms 33 are pressed down to be clamped and positioned with the second locking holes 13, the locking portion provided on the upper side of the avoidance groove in the first lock body 32 enters the cavity 11 and is pressed into the locking groove 21 to lock the conductor component.

[0037] The conductor component 2 is provided with an outwardly protruding insertion stopper 22, which abuts against the step groove 111 in the cavity 11, and can prevent the conductor component 2 from being over-inserted into the cavity 11. In the later stage, the end of the elastic locking arm is buckled into one side of the locking groove 21 of the conductor component 2 to lock the conductor component 2 once, and the TPA lock 3 is partially pressed into the other side of the locking groove 21 of the conductor component 2 to lock the conductor component 2 for a second time, so that the conductor component 2 is more stably installed in the plastic sheath 1, and the conductor component 2 cannot move forward and backward, thereby ensuring the quality of the product.

[0038] The plastic sheath 1 is provided with an insertion slot 14 for installing the TPA lock 3 along its upper end downward, and the insertion slot 14 passes through each of the cavities 11 and the first locking hole 12 and the second locking hole 13. When the TPA lock 3 is fully inserted into the insertion slot 14, the buckle arm 33 of the TPA lock 3 is clamped and positioned with the second locking hole 13 on the plastic sheath 1, and the upper end surface of the TPA lock 3 is flush with the upper end surface of the plastic sheath 1, or the upper end surface of the TPA lock 3 is lower than the upper end surface of the plastic sheath 1.

[0039] The locking portion has an arc-shaped notch 301, which is used to contact the locking groove 21 of the conductor component 2, or the arc-shaped notch 301 is used to play a evasive role, so that the locking portion can be embedded in the locking groove 21 with a larger area, thereby enabling the locking portion to lock the conductor component 2 more stably.

[0040] Among them, the first lock body 32 is provided with a plurality of hollow grooves 320 for increasing the elasticity of the lock part, wherein the hollow grooves 320 can not only reduce the amount of material used in the entire TPA lock 3 and reduce the overall weight, but also increase the elasticity of the lock part, thereby enabling the lock part to lock the conductor assembly 2 more stably.

[0041] The avoidance grooves include at least two first avoidance grooves 321 formed on one side of the first lock body 32 and distributed longitudinally, and at least two second avoidance grooves 322 formed on the other side of the first lock body 32 and distributed longitudinally, and the locking part includes a first locking part 323 arranged on the upper side of the first avoidance groove 321 and a second locking part 324 arranged on the upper side of the second avoidance groove 322. The size requirements of the first avoidance groove 321 and the second avoidance groove 322 are as follows: when the buckle arm 33 at the lower end of the TPA lock 3 is first clamped and positioned with the first locking hole 12 on the plastic sheath 1, as long as the first avoidance groove 321 and the second avoidance groove 322 do not block the cavity 11, that is, the first avoidance groove 321 and the second avoidance groove 322 will not affect the normal insertion of the conductor component 2 into the cavity 11. Of course, the contours of the first avoidance groove 321 and the second avoidance groove 322 are greater than or equal to the inner wall size of the cavity 11.

[0042] When the present invention adopts: the plastic sheath 1 is provided with two rows of longitudinally distributed cavity groups, and each cavity group includes three transversely distributed cavities 11, that is, six cavities 11 are arranged in a 3*2 array, and the four conductor components 2 are also arranged in a 3*2 array.

[0043] That is to say, each cavity group includes three laterally distributed cavities 11, and the first elastic locking arm 15 located at the upper / lower diagonal (about 45° angle) of the cavity 11 in the middle row is extended from front to back, and the end of the first elastic locking arm 15 is formed with a locking groove 21 for clamping the conductor component 2 to pull the first barb 151 of the conductor component 2, that is, the first elastic locking arm 15 pulls the conductor component 2 by hooking to lock the conductor component 2 in the plastic sheath 1; the second elastic locking arm 16 in the two rows of cavities 11 on both sides is extended from back to front, that is, the second elastic locking arm 16 blocks the conductor component 2 by supporting to lock the conductor component 2 in the plastic sheath 1, and the second elastic locking arm 16 and the first elastic locking arm 15 constitute the elastic locking arm.

[0044] Among them, the first elastic locking arm 15 located at the cavity 11 in the middle row is distributed in mirror symmetry, which can save space. On this basis, the TPA lock 3 also includes a second lock body 34 formed at the lower end of the TPA lock seat 31 and used to simultaneously lock a row of conductor components 2. One side of the second lock body 34 is provided with at least two third avoidance grooves 341 distributed longitudinally, and the upper side of the third avoidance groove 341 is provided with a third locking portion 342; the other side of the second lock body 34 is not provided with an avoidance groove and a locking portion to form an avoidance surface 343, and the avoidance surface 343 is close to the first elastic locking arm 15, so that it can avoid the first elastic locking arm 15, making the structure more compact, achieving the purpose of saving space, and allowing the first elastic locking arm 15 to have enough space to produce elastic deformation.

[0045] The first barb 151 has an arc-shaped longitudinal section, and the first barb 151 has a first guiding slope 152, which has a guiding function. When the conductor component 2 penetrates the cavity 11 and passes over the first elastic locking arm 15, it first contacts the first guiding slope 152 of the first barb 151, and then can press down the first elastic locking arm 15 and its first barb 151, so that the first elastic locking arm 15 is compressed, so that the conductor component 2 can quickly and smoothly pass over the first elastic locking arm 15, and finally be clamped by the first barb 151 into the locking groove 21 of the conductor component 2 to pull the conductor component 2.

[0046] The end of the second elastic locking arm 16 is formed with a locking groove 21 for inserting into the conductor assembly 2 to hold the pressing portion 161 of the conductor assembly 2. The pressing portion 161 has an arc-shaped longitudinal section and has a second guiding inclined surface 162. When the conductor assembly 2 passes through the cavity 11 and passes over the second elastic locking arm 16, it first contacts the second guiding inclined surface 162 of the pressing portion 161, and then the second elastic locking arm 16 and the pressing portion 161 are pressed down, so that the second elastic locking arm 16 is compressed, and then the conductor assembly 2 can quickly and smoothly pass over the second elastic locking arm 16, and finally the pressing portion 161 is inserted into the locking groove 21 of the conductor assembly 2 to hold the conductor assembly 2, thereby achieving the purpose of locking the conductor assembly 2.

[0047] The rear end face of the plastic sheath 1 is provided with a first air-avoiding molding groove 113 penetrating a row of cavities 11 located in the middle, the first elastic locking arm 15 is placed in the first air-avoiding molding groove 113, and a gap is formed between the first elastic locking arm 15 and the groove wall of the first air-avoiding molding groove 113, so that the first elastic locking arm 15 can produce elastic deformation; the outer side of the plastic sheath 1 is provided with a second air-avoiding molding groove 114 penetrating two rows of cavities 11 located on both sides from the outside to the inside, the second elastic locking arm 16 is placed in the second air-avoiding molding groove 114, and a gap is formed between the second elastic locking arm 16 and the groove wall of the second air-avoiding molding groove 114, so that the second elastic locking arm 16 can produce elastic deformation.

[0048] The present invention is preferably used as an automotive Ethernet connector. Meanwhile, coaxial connectors and optical fiber connectors can also use the primary lock and secondary lock structure.

[0049] In summary, the present invention uses a TPA lock 3 to achieve secondary locking of all conductor components (which can be 4, 6, 8, etc.), and the number of TPA locks 3 used is very small, which can not only reduce the number of parts, but also improve assembly efficiency, and the cost will be relatively low, which can improve market competitiveness. In addition, when the TPA lock 3 is assembled, the buckle arm 33 at its lower end is first clamped and positioned with the first locking hole 12 on the plastic sheath 1 to achieve the purpose of pre-installing the TPA lock 3, and after the conductor components 2 are assembled one by one in the cavity 11 of the plastic sheath 1, the TPA lock 3 is directly pressed down, so that the locking part of the first lock body 32 can enter the cavity 11 and press into the locking groove 21 to lock the conductor component 2, and its installation is more convenient, and the TPA lock 3 can quickly lock the conductor component 2, and its assembly efficiency is higher. At the same time, the latch arm of the TPA lock leaves the first locking hole and is locked and positioned with the second locking hole on the plastic sheath, ensuring that the TPA lock is stably installed on the plastic sheath, thereby ensuring the quality of the entire multi-cavity connector.

[0050] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. All equivalent changes or modifications made according to the structure, characteristics and principles described in the patent application scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A method for assembling a multi-cavity connector, characterized in that: The assembly method comprises: installing a TPA lock (3) on a plastic sheath (1), and firstly locking and positioning a buckle arm (33) at the lower end of the TPA lock (3) with a first locking hole (12) on the plastic sheath (1), at which time, the avoidance grooves provided on both sides of a first lock body (32) of the TPA lock (3) correspond to a cavity (11) provided on the plastic sheath (1) and do not block the cavity (11); then, inserting a plurality of conductor components (2) into the cavity (11) of the plastic sheath (1) one by one, and the conductor components (2) smoothly pass through the avoidance grooves of the first lock body (32). The conductor assembly (2) is inserted into the first locking hole (12) and inserted into place. When the conductor assembly (2) is inserted into place, the elastic locking arm in the cavity (11) is buckled into one side of the locking groove (21) on the conductor assembly (2) to lock the conductor assembly (2) once, thereby positioning the conductor assembly (2) in the cavity (11); finally, the TPA lock (3) is pressed down, so that the buckling arm (33) at the lower end of the TPA lock (3) leaves the first locking hole (12) and is locked and positioned with the second locking hole (13) on the plastic sheath (1). At this time, the locking parts arranged on the upper side of the avoidance groove in the first lock body (32) enter the cavity (11) and are pressed into the first locking hole (12). The other side of the locking groove (21) is used to simultaneously lock two adjacent rows of conductor components (2) for secondary locking; the plastic sheath (1) is provided with at least two rows of cavity groups distributed longitudinally, and each cavity group includes at least two transversely distributed cavities (11), and each cavity (11) is equipped with a conductor component (2); the TPA lock (3) includes a TPA lock seat (31) and at least one first lock body (32) formed at the lower end of the TPA lock seat (31) and used to simultaneously lock two adjacent rows of conductor components (2) and two first lock bodies (32) formed at the TPA lock seat (31) The plastic sheath (1) is provided with a first locking hole (12) and a second locking hole (13) which are matched with the locking arms (33) and are distributed in upper and lower layers; when the locking arms (33) are locked and positioned with the first locking holes (12), the avoidance grooves provided on both sides of the first lock body (32) correspond to the cavity and do not block the cavity (11); when the locking arms (33) are pressed down to be locked and positioned with the second locking holes (13), the locking part provided on the upper side of the avoidance groove in the first lock body (32) enters the cavity (11) and is pressed into the locking groove (21) to lock the conductor assembly; Each cavity group comprises three cavities (11) distributed laterally, a first elastic locking arm (15) located at one of the upper / lower diagonals of the cavity (11) in the middle row is formed to extend from front to rear, and a locking groove (21) for engaging the conductor assembly (2) is formed at the end of the first elastic locking arm (15) to pull the first barb (151) of the conductor assembly (2); second elastic locking arms (16) located in the two rows of cavities (11) on both sides are formed to extend from rear to front, and the second elastic locking arm (16) and the first elastic locking arm (15) constitute the elastic locking arm; The first barb (151) has an arc-shaped longitudinal section, and the first barb (151) has a first guiding bevel (152); the second elastic locking arm (16) has a locking groove (21) formed at the end thereof for locking into the conductor assembly (2) to support a pressing portion (161) of the conductor assembly (2); the pressing portion (161) has an arc-shaped longitudinal section, and the pressing portion (161) has a second guiding bevel (162).

2. The method for assembling a multi-cavity connector according to claim 1, characterized in that: The first lock body (32) is provided with a plurality of hollow grooves (320) for increasing the elasticity of the lock portion; the lock portion has an arc-shaped notch (301).

3. The method for assembling a multi-cavity connector according to claim 1, characterized in that: The avoidance grooves include at least two first avoidance grooves (321) formed on one side of the first lock body (32) and distributed longitudinally, and at least two second avoidance grooves (322) formed on the other side of the first lock body (32) and distributed longitudinally, and the locking portion includes a first locking portion (323) arranged on the upper side of the first avoidance groove (321) and a second locking portion (324) arranged on the upper side of the second avoidance groove (322).

4. The method for assembling a multi-cavity connector according to claim 1, characterized in that: The plastic sheath (1) is provided with an insertion groove (14) extending downward from its upper end for installing the TPA lock (3), and the insertion groove (14) passes through each of the cavities (11) and the first locking hole (12) and the second locking hole (13).

5. The method for assembling a multi-cavity connector according to claim 1, characterized in that: The first elastic locking arms (15) located at the cavities (11) in the middle row are distributed in a mirror-symmetrical manner.

6. The method for assembling a multi-cavity connector according to claim 1, characterized in that: The TPA lock (3) further comprises a second lock body (34) formed at the lower end of the TPA lock seat (31) and used to simultaneously lock a row of conductor components (2); one side of the second lock body (34) is provided with at least two third avoidance grooves (341) distributed in the longitudinal direction; the upper side of the third avoidance groove (341) is provided with a third locking portion (342); the other side of the second lock body (34) is not provided with an avoidance groove and a locking portion to form an avoidance surface (343); the avoidance surface (343) is close to the first elastic locking arm (15).

7. A method for assembling a multi-cavity connector according to any one of claims 1 to 5, characterized in that: The conductor assembly (2) is provided with an outwardly protruding insertion stopper (22), and the insertion stopper (22) abuts against a step groove (111) in the cavity (11).

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