A pre-press structure, a connector housing and a terminal module

Abstract

The application discloses a pre-pressing structure, a connector shell and a terminal module, and relates to the technical field of connectors. The pre-pressing structure can increase the pre-pressing amount of the spring sheet of the pin head, thereby increasing the holding force of the pin, and the pre-pressing structure can limit the position of the pin head, so that the pin head is prevented from colliding with the other pin head or being nested with the other pin head when the pin head is inserted into the other pin head.

Description

Technical Field

[0001] This invention belongs to the field of connector technology, specifically relating to a pre-compression structure, connector housing, and terminal module. Background Technology

[0002] The mating area of ​​connectors in the prior art commonly has the following defects:

[0003] 1. For example Figure 1 , 2 As shown in Figure 3, the connector mating end head does not have a limiting end bullet piece. When the connector is mated, there is a risk of insufficient holding force, pin collision, and pin entrapment (as shown at point 40 in the figure).

[0004] 2. For example Figure 4 and 5 As shown, current similar connector products use a back-to-back arrangement at the mating interface (as shown at point 50 in the figure). This mating interface uses two types of wafer components, Wafer A and Wafer B, in combination. The connector row requires 1 + 4N modules (including 2N Wafer A units and 2N Wafer B units) to achieve the mating connection. This structure carries a risk of unreliable contact on one side during mating, such as... Figure 6 and Figure 7 Single-sided contact refers to a situation in a back-to-back arrangement where, if the connector is offset to one side during insertion, there will be a situation where the terminals on one side are in contact (as shown at point 80 in the figure), while the terminals on the other side are not in contact (as shown at point 90 in the figure).

[0005] Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the prior art and to provide a pre-compression structure, connector housing and terminal module. By setting the pre-compression structure, this device can increase the pre-compression amount of the terminal head spring, thereby increasing the holding force of the terminal. In addition, the pre-compression structure will restrict the position of the terminal head and protect the terminal head from collision and pin entrapment during mating.

[0007] One of the purposes of the present application is to provide a pre-press structure, comprising a connector housing and a terminal module, the connector housing comprises an insulating shell, the insulating shell is divided into independent mating cavities by an insulating partition plate, the mating cavities are used for accommodating the terminal module, the pre-press limiting part is provided on the insulating partition plate, the pre-press limiting part comprises a limiting table, the limiting table is used for limiting the corresponding terminal; the terminal module comprises a terminal, the terminal comprises a contact section and a limiting section, the contact section is used for abutting contact with the corresponding terminal of the adapter connector, and the limiting section is used for abutting contact with the corresponding pre-press limiting part to limit the terminal; the terminal limiting section extends into the pre-press limiting part and abuts against the limiting table to prevent the needle from being lodged or the needle from being struck during the plug-in, and meanwhile, the pre-press amount of the terminal can be increased to make the terminal contact reliable.

[0008] As a preferred solution, the pre-press limiting part further comprises a limiting partition plate, the limiting partition plate can surround a gap with the limiting table to accommodate the terminal, and the terminal inserted into the gap is limited in the gap.

[0009] As a preferred solution, the distance a between the vertical faces on the same side of two adjacent limiting tables is not less than 1 / 2 of the distance b between the corresponding two adjacent terminals.

[0010] As a preferred solution, all the contact sections of the terminals on the terminal module protrude to the same side, the protruding side of the contact section is the head side, and the recessed side of the contact section is the back side, and the protruding side of the contact section of each terminal module is arranged opposite to the recessed side of the contact section of the adjacent terminal module.

[0011] As a preferred solution, a slot outer partition plate is arranged between the two adjacent limiting partition plates, the slot outer partition plate is connected with the insulating partition plate and is used for isolating the terminals between the adjacent terminal modules.

[0012] As a preferred solution, the limiting partition plate is formed with a guide inclined surface, and the guide inclined surfaces of the adjacent limiting partition plates are located in the same plane to form a plug-in inclined surface.

[0013] As a preferred solution, a chamfer structure is formed at the abutting position of the limiting table and the terminal.

[0014] As a preferred solution, 1+2N (N≥1) rows of the same terminal modules are arranged in the insulating shell to realize the plug-in matching of the connector.

[0015] The second purpose of the present application is to provide a connector housing, comprising an insulating shell, the insulating shell is divided into independent mating cavities by an insulating partition plate, the mating cavities are used for accommodating the corresponding terminal module, a pre-press limiting part is provided on the insulating partition plate, the pre-press limiting part comprises a limiting table and a limiting partition plate, the limiting partition plate can surround a gap with the limiting table to accommodate the corresponding terminal, the corresponding terminal inserted into the gap is limited in the gap, and the limiting table is used for blocking and limiting the end of the corresponding terminal.

[0016] As a preferred solution, a slot outer partition plate is arranged between two adjacent limiting partition plates, the slot outer partition plate is connected with the insulating partition plate, and is used for isolating the terminals between the adjacent terminal modules from each other.

[0017] As a preferred solution, the limiting partition plate is formed with a guide inclined surface, and the guide inclined surfaces of the adjacent limiting partition plates are located in the same plane to form an insertion inclined surface.

[0018] The third object of the present application is to provide a terminal module, which comprises a terminal, the terminal comprising a contact section and a limiting section, the contact section being used for abutting contact with a corresponding terminal of an adapter connector, and the limiting section being used for abutting contact with a corresponding pre-pressing limiting part to limit the end of the terminal.

[0019] Compared with the prior art, the present application has at least the following beneficial effects:

[0020] Firstly, the pre-pressing limiting structure is formed by the cooperation of the terminal head and the insulating shell, the plastic limiting structure is arranged on the insertion interface of the insulating shell, and the head bending structure is arranged on the terminal head, so that the pre-pressing limiting structure can perform the pre-pressing and limiting functions on the terminal head. Specifically, the pre-pressing limiting structure can increase the pre-pressing amount of the spring sheet, thereby increasing the holding force of the terminal, and the pre-pressing structure can limit the position of the terminal head, thereby preventing the phenomena of pin striking and hole pinning when the terminal head is inserted.

[0021] Secondly, the wafer head-to-back same-direction arrangement mode is used for the insertion interface of the connector, and the pre-pressing structure is used, so that the beneficial effects are as follows: ① the structure only needs to use one wafer A, and the dislocation arrangement of different matching cavities of the shell is used to realize the stable transmission of high-speed signals and save the cost of molds; ② the head-to-back same-direction arrangement mode is adopted, and the connector row number uses 1+2N modules, so that the plug-in cooperation of the connector can be realized; ③ the insertion interface of the wafer adopts the head-to-back same-direction arrangement mode, so that the contacts of each row of the insertion interface can be reliably contacted. Figure 6 In the prior art, as shown in the prior art, the deformation directions of the two terminals of the back-to-back structure are opposite, when the connector is offset to one side, the deformation of the terminals on both sides is not uniform, and the single-sided contact problem exists. In the present application, the deformation directions of the terminals of the head-to-back structure are towards the same side, the force direction is stable, the deformation directions of the terminals are the same, when the connector is offset to one side, the deformation amounts of the terminals of the connector are similar, and the deformation difference does not exist, so that the reliable contact of the contacts of the insertion interface can be ensured. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to make the technical solution of the embodiments of the application or the prior art clearer, the accompanying drawings needed in the embodiments or the prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the application, and other accompanying drawings can be obtained by those skilled in the art without any creative effort on the basis of these accompanying drawings.

[0023] Figure 1 Structure diagram of the insertion area of the connector product in the prior art;

[0024] Figure 2 Schematic diagram of the insertion of the connector product in the prior art;

[0025] Figure 3 Schematic diagram of the normal insertion and the needle-in-hole state of the connector product in the prior art;

[0026] Figure 4 The terminal head of the connector in the prior art adopts the back-to-back arrangement mode;

[0027] Figure 5 The terminal head of the connector in the prior art adopts the back-to-back arrangement mode; Figure 4 The local enlarged view of part A-A in the prior art;

[0028] Figure 6 Schematic diagram of the insertion of the connector product in the prior art;

[0029] Figure 7 The terminal head of the connector in the prior art adopts the back-to-back arrangement mode; Figure 6 The single-side contact schematic diagram in the head-to-back arrangement mode at position I in the prior art;

[0030] Figure 8 Structure diagram of the needle seat of the application;

[0031] Figure 9 The terminal head of the connector in the prior art adopts the back-to-back arrangement mode; Figure 8 The local enlarged view of part A-A in the prior art;

[0032] Figure 10 Structure diagram of the inner insulation part of the application;

[0033] Figure 11 The terminal head of the connector in the prior art adopts the back-to-back arrangement mode; Figure 10 The local enlarged view of part B-B in the prior art;

[0034] Figure 12 The local structure diagram of the pre-pressing structure of the application;

[0035] Figure 13 Connection structure diagram of the needle seat and the insulation shell of the application;

[0036] Figure 14 Layout diagram of the fitting cavity of the application;

[0037] Figure 15The connector product plug-in schematic diagram of the application;

[0038] Figure 16 The distance schematic diagram of the limiting platform in the application; Figure 15 The local enlarged view of II in the middle;

[0039] Figure 17 The distance schematic diagram of the limiting platform in the application;

[0040] The mark in the figure:

[0041] 1, insulating shell, 11, first matching cavity, 12, second matching cavity, 2, insulating partition, 3, terminal module, 31, terminal, 311, straight section, 312, contact section, 313, limiting section, 32, needle seat, 4, pre-pressing limiting part, 41, limiting partition, 411, guide inclined surface, 42, limiting platform, 43, slot outer partition, 44, gap;

[0042] 10, terminal, 20, plug-in interface, 30, normal plug-in, 40, socket needle, 50, needle seat arrangement mode, 60, needle seat A, 70, needle seat B, 80, terminal contact, 90, terminal non-contact. DETAILED DESCRIPTION

[0043] The application will be described in detail below through exemplary embodiments. However, it should be understood that the elements, structures and features in one embodiment can be beneficially combined into other embodiments without further description.

[0044] It should be noted that: unless otherwise defined, the technical terms or scientific terms used in the present application should be understood as the general meaning understood by those skilled in the art to which the present application belongs. The "one", "a" or "the" and similar words used in the patent application description and claims of the present application do not represent quantity limitation, but indicate that there is at least one. The "including" or "containing" and similar words indicate that the elements or objects appearing before "including" or "containing" cover the elements or objects listed after "including" or "containing" and their equivalents, but do not exclude other elements or objects with the same function.

[0045] As shown in the figure, the present scheme is through a pre-pressing structure, including an insulating shell 1 and a plurality of terminal modules 3, and the plug-in interface of the insulating shell 1 is improved, and a plastic limiting structure is arranged on the plug-in interface of the insulating shell 1, which is used for pre-pressing and limiting the terminal 31 end of the terminal module 3. That is, the head of the terminal 31 uses a head bending structure, so that the terminal 31 head end is in abutment with the plastic limiting structure, and the terminal 31 end is blocked on the same side of the corresponding limiting platform 42. Figure 17 The minimum distance (a minNo less than 1 / 2 terminal body spacing (b), the purpose is to ensure the minimum distance (a min Not too close, to avoid causing short pile effect, worsen high-speed signal transmission crosstalk; simulation verification terminal spring distance is less than 0.6mm, the crosstalk performance of the product will deteriorate rapidly. The realization of the pre-pressing structure needs the terminal module (wafer) to adopt the head-to-back arrangement form as shown in the figure, because for the back-to-back structure form in the prior art, if the pre-pressing limiting structure is set, the short pile effect will be obvious, which is not conducive to the transmission of high-speed signals.

[0046] As shown in Figure 13 , the insulating shell 1 is divided into independent mating cavities by the insulating partition plate 2, and the terminal module 3 is installed in the mating cavity. The pre-pressing limiting part 4 is formed by extending upward from the insulating partition plate 2.

[0047] As shown in Figure 14 , the mating cavity includes a first mating cavity 11 and a second mating cavity 12 for installing the terminal module 3. The first mating cavity 11 and the second mating cavity 12 are spaced apart, and the first mating cavity 11 and the second mating cavity 12 are arranged in sequence and misaligned along the B direction in Figure 13 , the terminal module 3 is installed into the first mating cavity 11 and the second mating cavity 12, and is naturally misaligned. Alternatively, the first mating cavity 11 and the second mating cavity 12 can be arranged in a regular manner. When the terminal module 3 is installed into the first mating cavity 11 and the second mating cavity 12, the terminal module 3 is installed in the installation space, and the misaligned installation of adjacent modules is achieved. The ultimate purpose of the above two methods is to achieve the misaligned installation of adjacent terminal modules 3.

[0048] The pre-pressing limiting part 4 is formed by extending upward from the insulating partition plate 2. In this scheme, the pre-pressing limiting part 4 includes a plurality of limiting partition plates 41 and limiting tables 42 arranged in sequence along the A direction in Figure 14 , a gap 44 is formed between the limiting partition plates 41 and the limiting tables 42, and the terminal 31 of the terminal module 3 is installed in the gap 44. The gap 44 can limit the terminal 31 inserted therein in the gap 44, so that adjacent terminals are separated. The limiting table 42 is located at one side corner above the gap 44, and the end of the terminal 31 has a bending structure matched with the limiting table 42. The end of the terminal 31 extends into the gap 44 of the limiting partition plate 41 and abuts against the vertical surface of the limiting table 42. In this way, the end of the terminal 31 can be limited, and the vertical surface of the limiting table 42 refers to the end surface of the limiting table 42 abutting against the terminal 31. All the vertical surfaces of the limiting tables face the same direction.

[0049] As shown in the figure, the terminal 31 end includes straight section 311, contact section 312 and limiting section 313 connected in sequence, the contact section 312 and the limiting section 313 are approximately S-shaped structure, the contact section 312 is bent to the first section bending structure in the direction opposite to C direction, the limiting section 313 is bent upward to form the second section bending structure, the straight section 311 is connected with the root of the terminal 31, and a certain bending is formed in the natural state, so the terminal 31 will be deflected to the C direction in the natural state and inclined at a certain angle, due to the effect of the limiting platform 42, the terminal 31 end is blocked and limited, thereby providing a certain pre-pressure for the terminal 31, the contact section 312 is not only conducive to reducing the insertion force when the two connectors are inserted, and plays a role in facilitating the insertion and guidance of the two opposite terminals 31, but also is conducive to improving the relative holding force after insertion, the limiting section 313 is blocked on the same side of the limiting platform 42, so that the inner arc surface of the limiting section 313 is in close contact with the abutting surface of the limiting platform 42, and since the terminals 31 of the two opposite connectors are blocked in the limiting platform 42 by the limiting section 313, the position of the terminal 31 is limited during the insertion process, and the most terminal ends of the two terminals 31 will not be in direct contact, so the phenomenon of the plunger and the female needle of the two inserted terminals 31 will not occur. Figure 12 Figure 12

[0050] In the present scheme, the convex side of the contact section 312 is the head side 314, and the concave side of the contact section 312 is the back side 315, so the head-to-back arrangement adopted in the present scheme means that the head side 314 of the terminal 31 of the terminal module 3 is arranged opposite to the back side 315 of the terminal 31 of the adjacent terminal module 3. As shown in the figure, Figure 5 the back-to-back arrangement adopted in the prior art means that the back side 315 of the terminal 31 of a single terminal module 3 is arranged opposite to the back side 315 of the terminal 31 of the adjacent terminal module 3. Therefore, after the two connectors are inserted in the back-to-back arrangement in the prior art, the distance between the two terminals 31 will be shortened, and after the two connectors are inserted in the head-to-back arrangement in the present scheme, although the terminals 31 will still be pressed to one side, the terminals 31 of the adjacent terminal module 3 are pressed to the same side by the same distance, and the distance between them remains basically unchanged. As mentioned above, reliable contact of the contact points is the optimization effect of the head-to-back structure, and in the prior art, Figure 6 and 7 ​​As shown, if the back-to-back arrangement is adopted, the deformation directions of the two terminals of the back-to-back structure are opposite, and when the connector is offset to one side for the plug-in matching, there will be a problem of uneven deformation of the terminals on both sides, and thus there will be a problem of unilateral contact. In the present scheme, the connector adopts a head-to-back arrangement, the deformation directions of the terminals 31 of the head-to-back structure connector are towards the same side, the force direction is stable, the deformation directions of the terminals 31 are the same, and when the connector is offset to one side for the plug-in matching, the deformation amounts of the terminals 31 of the connector are similar, and there will be no deformation difference between the terminals 31.

[0051] Specifically, each insulating partition plate 2 extends upward to form a plurality of limiting partition plates 41, the limiting partition plates 41 are arranged in sequence along the A direction in the terminal seat 3, Figure 14 wherein a mounting gap 44 of the terminal 31 is formed between two adjacent limiting partition plates 41, the number of the limiting partition plates 41 is determined by the number of the terminals 31 of the terminal seat 3, the spacing of the limiting partition plates 41 can be determined by the position and spacing of the terminals 31, a limiting platform 42 is arranged between two limiting partition plates 41, the length direction of the limiting platform 42 is arranged along the A direction, the rod body of the limiting platform 42 is perpendicular to the limiting partition plate 41, and the two ends of the limiting platform 42 are respectively connected to the side surfaces of the limiting partition plates 41.

[0052] Preferably, a guide inclined surface 411 is formed at one corner of the insertion end of the limiting partition plate 41, the insertion end refers to one end of the plug-in matching of the two connectors, the guide inclined surface 411 makes the limiting partition plate 41 gradually widen from top to bottom, and the guide inclined surface 411 is used for guiding the plug-in matching of the connector and the mating connector, the guide inclined surfaces 411 of each row of limiting partition plates 41 form a plug-in matching inclined surface, which is used for guiding when the connector is plug-in matched.

[0053] As shown in Figure 11 , the slot outer partition plate 43 is formed by extending upward from the insulating partition plate 2, an inner chamfer is formed inside the corner of the connection between the slot outer partition plate 43 and the insulating partition plate 2, which is used for strengthening the strength of the slot outer partition plate 43, the slot outer partition plate 43 is correspondingly arranged below the guide inclined surface, the slot outer partition plate 43 is connected to one side of the guide inclined surface of the limiting partition plate 41, the thickness of the slot outer partition plate 43 is smaller than the thickness of the insulating partition plate 2, the first side end surface of the slot outer partition plate 43 is flush with the same side end surface of the insulating partition plate 2, and the second side end surface of the slot outer partition plate 43 is flush with the edge of the limiting partition plate 41, and the whole partition plate composed of the slot outer partition plate 43 and the insulating partition plate 2 is used for common isolation of the terminal module 3.

[0054] In addition, as shown in Figure 15 and 16When the connector and the mating connector are inserted together, the end of the limiting partition plate 41 is inserted into the mating cavity of the mating connector, respectively. For the convenience of description, the connector and the mating connector are called connector one and connector two, respectively. The pre-pressing limiting part 4 of the connector one includes the limiting partition plate 41a, the limiting platform 42a and the slot outer partition plate 43a, and the terminal 31a is arranged in the pre-pressing limiting part of the connector one. The pre-pressing limiting part 4 of the connector two includes the limiting partition plate 41b, the limiting platform 42b and the slot outer partition plate 43b, and the terminal 31b is correspondingly arranged in the pre-pressing limiting part of the connector two.

[0055] During the insertion of the connector, the limiting partition plate 41b is located on both sides of the limiting partition plate 41a, the guide slope of the limiting partition plate 41b matched with the limiting partition plate 41a is arranged oppositely to guide the insertion and reduce the insertion force, the slot outer partition plate 43a is close to the slot outer partition plate 43b and the end faces are matched and contacted, and the two matched faces of the slot outer partition plate 43a and the slot outer partition plate 43b slide and insert oppositely along the insertion direction of the connector. On the other side in the B direction, the terminal 31a embedded in the limiting partition plate 41a abuts against the two terminals 31b embedded in the limiting partition plate 41b.

[0056] The contact sections 312 of the two matched terminals 31 first contact, then, due to the mutual abutting action of the contact sections 312 of the two terminals 31, the terminal 31 end limiting section 313 will be separated from the corresponding limiting platform 42, when the contact sections 312 of the two terminals 31 pass through and contact in error, the two terminals 31 abut against each other under the self elastic force, the convex side of the contact section 312a will abut against and contact the straight section 311b of the other terminal 31b, and the two matched terminals 31 abut against and press each other through the respective pre-pressing force, so as to ensure the conduction effect.

[0057] In the embodiment, in order to increase the adhesion with the end of the terminal module 3, a chamfer structure is formed at the edge corner where the limiting platform 42 and the inner arc surface of the limiting section 313 of the terminal 31 are matched, so as to better contact the corner of the limiting section 313 of the terminal 31 end.

[0058] In the scheme, the pre-pressing structure is formed by matching the terminal 31 and the insulating shell 1: the plastic limiting structure is used on the insertion interface of the insulating shell 1, and the head bending structure is used on the head of the terminal 31, and the two are matched to form the pre-pressing limiting structure together. The terminal head is limited by the pre-pressing limiting structure. In the prior art, if the pre-pressing limiting part 4 is not arranged, in order to avoid the terminal 31 from hitting the needle and the female needle, the terminal 31 can only deflect a very small angle in the C direction in the natural state, and this cannot completely avoid the hitting of the needle and the female needle, and the holding force of the two corresponding terminals 31 after the insertion contact is small. After the pre-pressing limiting part 4 is arranged in the scheme, the terminal 31 is blocked and limited by the pre-pressing limiting part 4, the terminal 31 can deflect in the C direction in the natural state, and the terminal 31 can be prevented from hitting the needle and the female needle. Figure 12The C direction deflection in the terminal 31 is large, so the pre-pressing amount of the terminal 31 can be increased by arranging the pre-pressing limiting part 4, and the holding force of the terminal 31 after the two connectors are inserted and contacted can be further increased. The pre-pressing structure can limit the position of the head of the terminal 31, and the head of the terminal 31 will not be damaged when the connectors are inserted.

[0059] In the embodiment, the limiting blocks 42 of the pre-pressing limiting structure 4 in each row are arranged at the same height. The limiting blocks 42 not only limit and fix the head of the terminal 31, but also form a fixed space between the limiting partitions 41, thereby supporting and fixing the limiting partitions 41. The accuracy of the connectors when being inserted and fixed is ensured, the strength of the insertion surface is improved, and the connectors can be smoothly inserted.

[0060] The embodiment also provides a connector using the pre-pressing structure, which comprises an insulating shell 1, an insulating partition 2 and a terminal module 3. The insulating shell 1 is divided into a first mating cavity 111 and a second mating cavity 112 arranged at intervals. The terminal module 3 is embedded in the first mating cavity 111 and the second mating cavity 112 and arranged at intervals. Specifically, the connector has the following design modes. In a first mode, the first mating cavity 111 and the second mating cavity 112 are arranged at intervals, so that the terminal module 3 is arranged at intervals when being installed into the mating cavities. In a second mode, the first mating cavity 111 and the second mating cavity 112 are arranged in a regular manner, and the terminal module 3 needs to be installed at intervals when being installed into the mating cavities.

[0061] The connector interface of the embodiment uses a head-to-back and same-direction arrangement mode of wafer (terminal module), and is used in combination with the pre-pressing structure of the product.

[0062] As shown in the figure, the terminal module 3 comprises an injection molding part 32 and a plurality of terminals 31 arranged side by side. The insertion end of the terminal 31 extends into the installation gap between the limiting partitions 41, and each limiting block 42 abuts against the insertion end of the terminal 31.

[0063] In the embodiment, the connector only needs to use a wafer A (terminal module A) and uses the interval arrangement of the first mating cavity 111 and the second mating cavity 112 of the insulating shell 11 to finally realize the interval insertion and fixation of the terminal module 3, so that the stable transmission of high-speed signals can be realized and the cost of the mold can be saved.

[0064] In the embodiment, the connector uses a head-to-back and same-direction arrangement mode, and the number of rows of the connector uses 1+2N modules, where N is a natural number such as 1, 2, 3, etc. The wafer (terminal module) uses a head-to-back and same-direction arrangement mode of the insertion interface, so that the contacts in each row of the insertion interface can be reliably contacted.

[0065] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed with the preferred embodiments as above, it is not intended to limit the present application. Any person skilled in the art, without departing from the technical solution of the present application, can make some changes or modifications to the above disclosed technical content to obtain equivalent embodiments with equivalent changes. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application, without departing from the technical solution of the present application, shall still fall within the scope of the technical solution of the present application.

Claims

1. A precompression structure, characterized by: The connector comprises a connector housing and a terminal module, the connector housing comprises an insulating housing, the insulating housing is divided into independent fitting cavities by an insulating partition plate, the fitting cavities are used for accommodating the terminal module, a pre-pressing limiting part is arranged on the insulating partition plate, the pre-pressing limiting part comprises a limiting platform, and the limiting platform is used for limiting the corresponding terminal; The terminal module comprises a terminal, the terminal comprises a contact section and a limiting section, the contact section is used for abutting contact with the corresponding terminal of an adapter connector, and the limiting section is used for abutting contact with the corresponding pre-pressing limiting part to limit the terminal; The limiting section of the terminal extends into the pre-pressing limiting part and abuts against the limiting platform, so that the terminal is prevented from being stuck or hit when being inserted, the pre-pressing amount of the terminal is increased, and the terminal contact is reliable; All the contact sections of the terminals on the terminal module protrude to the same side, the protruding side of the contact section is a head side, and the concave side of the contact section is a back side, the protruding side of the contact section of each terminal module is arranged opposite to the concave side of the contact section of an adjacent terminal module; The pre-pressing limiting part further comprises a limiting partition plate, the limiting partition plate can form a gap for accommodating the terminal together with the limiting platform, and the terminal inserted into the gap is limited in the gap; a slot outer partition plate is arranged between two adjacent limiting partition plates, the slot outer partition plate is connected with the insulating partition plate and is used for isolating the terminals between the adjacent terminal modules; the limiting partition plate is formed with a guide inclined surface, the guide inclined surfaces of the adjacent limiting partition plates are located in the same plane to form an insertion inclined surface.

2. A pre-stressed structure as claimed in claim 1, wherein: The distance a between the vertical surfaces on the same side of two adjacent limiting platforms is not less than 1 / 2 of the distance b between the corresponding two adjacent terminals.

3. A pre-stressed structure as claimed in claim 1 or 2, wherein: A chamfer structure is formed at the abutting position of the limiting platform and the terminal.

4. A pre-stressed structure as claimed in claim 3, wherein: In the insulating housing, 1+2N (N≥1) rows of the same terminal module are arranged, so that the plug-in connection of the connector is realized.

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