CN203536619U - Connector shell and connector - Google Patents

Abstract

The utility model discloses a connector shell and a connector. The connector housing is characterized in that it comprises: an outer housing, the outer housing is provided with an elastic retaining device; an inner housing, the inner housing can be inserted into the outer housing, and the elastic retaining device restricts the inner housing The length of the shell inserted into the outer shell; mating connector; the mating connector is provided with a first cavity for accommodating the outer shell and the inner shell; the first cavity is provided with Force-relieving device: during the assembly process of the outer shell and the inner shell with the mating connector, the force-relieving device enables the elastic holding device to release the restriction on the inner and outer shells. The connector shell in the utility model requires less force for installation, has a simple structure and is low in cost.

Description

Connector housing and connector

technical field

The utility model relates to a connector shell and a connector.

Background technique

The connector includes a connector housing and connection terminals inserted on the housing. Terminal holes are arranged on the connector shell, and the connecting terminals are inserted into the terminal holes. When each connecting terminal is inserted into the terminal hole, it will be rubbed by the wall of the terminal hole to generate certain resistance. When the number of connecting terminals is large and inserted into the terminal hole at the same time, the sum of the resistance of multiple connecting terminals will require a large force to insert multiple connecting terminals into the terminal hole, resulting in inconvenient installation of the connecting terminals . Usually in this case, it is necessary to use an external auxiliary mechanism, such as a lever or a rack and pinion, to provide auxiliary force for insertion, and because of the friction in the transmission of force between parts, the auxiliary force cannot effectively improve the insertion condition. This results in a more complex structure of the connector and an increase in the cost of the parts.

Utility model content

One of the objectives of the present utility model is to provide a connector housing that is easy to assemble in order to overcome the shortcomings of the prior art.

In order to achieve the above object, the utility model is realized through the following technical solutions:

The connector housing is characterized by comprising:

an outer casing, the outer casing is provided with an elastic holding device;

an inner casing, the inner casing can be inserted into the outer casing, and the elastic holding device limits the length of the inner casing inserted into the outer casing;

A mating connector; the mating connector is provided with a first cavity for accommodating the outer shell and the inner shell; a force-relieving device is arranged in the first cavity;

During the process of the outer shell and the inner shell, the force-relieving device enables the elastic holding device to release the restriction on the inner shell;

Preferably, the elastic retaining device is an elastic hook, and the inner housing is provided with a step matched with the elastic hook, and the elastic hook restricts the insertion of the inner housing by abutting against the step length inside the housing.

Preferably, the outer casing is provided with a second cavity; the inner casing is provided with a plug-in post adapted to the second cavity; the elastic hook is disposed in the second cavity , the step is arranged on the insertion column; when the insertion column is inserted into the second cavity, the elastic hook is located in the moving direction of the step.

Preferably, the elastic hook is provided with a notch, and when the elastic hook abuts against the step, the step is located in the notch.

Preferably, one end of the elastic hook is disposed on the inner wall of the second cavity, and the other end is elastically and swingably disposed in the second cavity; the other end of the elastic hook can move toward the second cavity after being stressed. The inner wall of the cavity moves and can be reset after the external force is released.

Preferably, a shoulder is provided on the insertion column, and a card slot matching the shoulder is provided in the second cavity; when the insertion column is inserted into the second cavity , the shoulder can be inserted into the slot and can be removed from the shoulder.

Preferably, along the height direction of the outer casing, the card slot is arranged in the middle of the second cavity; along the height direction of the inner casing, the shoulder is arranged at the upper end of the insertion post.

Preferably, the card slot is arranged above the elastic hook.

Preferably, the force-resolving device is a force-relief terminal, and the force-relief terminal can be inserted into the second cavity to push the elastic hook.

Preferably, an inclined surface is provided at the top of the force-relieving terminal, and the inclined surface is arranged opposite to the elastic hook.

Preferably, when the elastic hook abuts against the step, the elastic hook does not completely abut against the step along the width direction, and the distance between the elastic hook and the inner wall of the second cavity is There is a channel between them for allowing the force-relieving terminal to pass through; the force-relieving terminal pushes the force-relieving terminal after passing through the channel so that it no longer touches the step.

Preferably, a terminal arranging section is provided in the middle of the outer casing along the length direction, and the terminal arranging section is provided with a plurality of first accommodating holes extending along the height direction of the outer casing.

Preferably, the outer casing is provided with two second cavities at intervals along the length direction; the terminal placement section is arranged between the two second cavities; and the inner casing is provided with two intervals along the length direction. Plug post.

Preferably, the inner housing is provided with a plurality of second accommodation holes; when the inner housing is inserted into the outer housing, each of the second accommodation holes is in the same position as one of the first accommodation holes opposite, and the second accommodating hole is located below the first accommodating hole.

Preferably, the plurality of connection terminals are arranged in the first cavity; after the outer casing and the inner casing are placed in the first cavity, some of the plurality of connection terminals are inserted into the plurality of connection terminals. into the first accommodation hole, and plugged with a plurality of mating connection terminals in the first accommodation hole.

Preferably, the insertion column is provided with an insertion hole; after the outer casing and the inner casing are placed in the first cavity, some of the connecting terminals are inserted into the insertion hole, and the The connecting terminal maintains the inner housing in the first cavity through frictional force with the hole wall of the insertion hole.

Preferably, the inner housing is provided with a plurality of second accommodation holes; when the inner housing is inserted into the outer housing, each of the second accommodation holes is in the same position as one of the first accommodation holes Opposite, and the second accommodating hole is located below the first accommodating hole; the inner housing is provided with a through hole that allows the force-resolving terminal to pass through, and the force-resolving terminal passes through the through-hole and then abuts against the Pushing against the elastic holding device, the elastic holding device releases the restriction on the inner casing.

Preferably, the outer surface of the outer shell is provided with a hook of a shrapnel, and the hook of the shrapnel is provided with a protrusion protruding from the shrapnel; the mating connector is provided with a hook for mating; the outer shell and When the inner housing is placed in the first cavity, the mating hook is located in the moving direction of the bump, and the outer housing and the mating connector pass through the bump and the mating connector. The above-mentioned mating card hook is hooked and connected.

Preferably, the outer casing is provided with a first accommodating hole for accommodating a plurality of mating connection terminals.

Preferably, the mating connector is provided with a plurality of connecting terminals, and another part of the plurality of connecting terminals is inserted into the first accommodating hole from one end of the first accommodating hole, and is connected to the first accommodating hole. The other part of the first accommodating hole is plugged with a plurality of mating connection terminals.

Preferably, the inner housing is provided with insertion holes for accommodating mating connection terminals.

Preferably, the mating connector is provided with a plurality of connection terminals, some of the plurality of connection terminals are inserted into the insertion hole from one end of the insertion hole, and are connected with the insertion hole. Some of the multiple mating connection terminals are plugged.

The second purpose of the utility model is to provide a connector housing that is easy to assemble in order to overcome the deficiencies in the prior art.

In order to achieve the above object, the utility model is realized through the following technical solutions:

The connector is characterized in that it includes a plurality of connecting terminals, a plurality of mating connecting terminals and the aforementioned connector shell, the connecting terminals are installed in the mating connector, and the mating connecting terminals are installed in the inner shell body and the outer shell.

The connector shell in the utility model divides the overall structure into an outer shell, an inner shell and a mating connector. When assembling, the outer shell and the inner shell can be assembled first, and then the outer shell and the inner shell can be assembled together. body together in the mating connector. Before being installed in the mating connector, the inner housing part is inserted into the outer housing and the lock remains in this state, and the mating connector can release the outer housing when the outer housing and the inner housing are installed together in the mating connector The locked state with the inner housing enables the inner housing to be fully inserted into the outer housing, and the outer housing and the inner housing are installed together into the mating connector. Some connection terminals are installed on the shell, and some connection terminals are installed on the inner casing. When assembling the shell, only the connection terminals installed on the outer shell will be subjected to the frictional resistance of the inner shell, and the connecting terminals installed on the inner shell will have no resistance, so less force is required for assembly. The assembly of the outer shell, the inner shell, and the mating connector is divided into two processes, which can also reduce the force required for continuous assembly and make assembly more convenient. Moreover, the overall structure of the utility model is simple and the cost is low.

Description of drawings

Fig. 1 is a structural schematic diagram of Embodiment 1 of the utility model.

Fig. 2 is a schematic diagram of the disassembled structure of Embodiment 1 of the present utility model.

FIG. 3 is a schematic structural diagram of the mating connector in Embodiment 1. FIG.

FIG. 4 is a schematic diagram of the structure of the inner casing in Embodiment 1. FIG.

FIG. 5 is a schematic diagram of the structure of the outer casing in Embodiment 1.

FIG. 6 is a schematic diagram of the first state of the assembly process of Embodiment 1. FIG.

FIG. 7 is a schematic diagram of the second state of the assembly process of Embodiment 1. FIG.

FIG. 8 is a schematic diagram of a third state of the assembly process of Embodiment 1. FIG.

Fig. 9 is a structural schematic diagram of Embodiment 2 of the utility model.

Detailed ways

Below in conjunction with embodiment and accompanying drawing, the utility model is further described. For convenience of description, unless otherwise specified, the directions of the present invention in the following embodiments are all with reference to Fig. 6, wherein the height direction is the up-down direction shown in Fig. 6, the length direction is the left-right direction in Fig. 6, and the width direction is Orientation perpendicular to the paper.

As shown in FIGS. 1 and 2 , the connector housing is characterized by comprising a mating connector 10 , an inner housing 20 and an outer housing 30 . The inner shell 20 and the outer shell 30 are plug-connected and installed in the first cavity 11 of the mating connector 10 .

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the mating connector 10 is used for accommodating the inner shell 20 and the outer shell 30 , is in the shape of a cuboid, and is provided with a first cavity 11 . A plurality of connecting terminals 12 and force-relieving terminals 13 distributed along the lengthwise direction of the mating connector 10 are arranged in the first cavity 11 . A slope 131 is provided at the top of the force-resolving terminal 13 . The slope 131 on the force-relieving terminal 13 is higher than the connection terminal 12 in the height direction. In the example shown in FIG. 6 , the height of the slope 131 is greater than that of the terminal 12 . The mating connector 10 is provided with a mating hook 14 protruding from the mating connector 10 .

As shown in Fig. 1, Fig. 2, Fig. 4, Fig. 6 to Fig. 9, the inner casing 20 has an inner casing top end 21 and an inner casing bottom end 22 along the height direction, and has an inner casing left end 23 and an inner casing left end 23 along the length direction. Housing right end 24. The bottom end of the inner casing 20 is a bottom plate 29 . The bottom plate 29 extends from the left end 23 of the inner housing to the right end 24 of the inner housing. Along the length direction, a plug-in column 25 is respectively arranged on the left and right sides of the inner housing 20 . The plug posts 25 are disposed on the bottom plate 29 . The insertion post 25 extends along the height direction of the inner housing 20 . The two plug posts 25 are arranged at intervals, and there is an accommodating space 26 between the two plug posts 25 . Along the length direction, a second accommodating hole 27 is provided in the middle of the bottom plate 29 . The second accommodating hole 27 extends along the height direction of the inner housing 20 from the bottom end 22 of the inner housing to communicate with the accommodating space 26 . A shoulder 251 is disposed on the top of the insertion post 25 , and the shoulder 251 protrudes from the insertion post 25 toward the accommodation space 26 . The insertion pole 25 is provided with a step 252 protruding from the insertion pole toward the accommodation space 26 . The step 252 is located below the shoulder 251 . The inner housing 20 is provided with a plurality of insertion holes 28 . One end of the insertion hole 28 is used to accommodate the mating connection terminal, and the other end is used to accommodate part of the connection terminals 12 . The insertion hole 28 runs through the bottom plate 29 and extends along the height direction of the inner housing 20 on the insertion column 25 . Two through holes 291 are also provided on the bottom plate 29 . The position of the through hole 291 is opposite to that of the force-releasing terminal 13 , allowing the force-relieving terminal 13 to pass through.

As shown in Fig. 1, Fig. 2 and Fig. 5, the outer casing 30 is in the shape of a cuboid, which has a top end 31 and a bottom end 32 of the outer casing along the height direction; Along the length direction, the middle part of the outer housing 30 is provided with a terminal placement section 35 . The terminal placement section 35 is provided with a plurality of first accommodating holes 36 extending along the height direction of the outer casing. Along the length direction, the left and right sides of the terminal placement section 35 are respectively provided with a second cavity 37 . The terminal placement section 35 is disposed between the two second cavities 37 . The terminal placement section 35 is provided with a first accommodation hole 36 . The first accommodating hole 36 extends along the height direction of the outer casing 30 . One end of the first accommodating hole 36 is used for accommodating a connecting terminal, and the other end is used for accommodating part of the connecting terminal 12 . The terminal arranging section 35 has a distance from the bottom end 32 of the outer casing for accommodating the bottom plate 29 . An elastic hook 41 is disposed on the outer surface of the outer shell 30 . The elastic clip hook 41 is provided with a protrusion 42 protruding from the elastic clip hook 41 . The elastic clip hook 41 is elastic.

As shown in FIGS. 6 to 9 , a card slot 38 is disposed in the second cavity 37 . An elastic hook 39 is disposed below the slot 38 . One end of the elastic hook 39 is disposed on the inner wall of the second cavity 37 , and the other end extends into the second cavity 37 . The other end of the elastic hook 39 located in the second cavity 37 is elastically swingable, and can move toward the inner wall of the second cavity 37 when pushed by a force, and automatically resets after the external force is removed. The other end of each elastic hook 39 is provided with a notch 391 .

The utility model assembly process is as follows:

As shown in FIG. 6 , the insertion post 25 of the inner housing 20 is inserted into the second cavity 37 from the bottom end 32 of the outer housing. The terminal placement section 35 is located in the accommodating space 26 . During the movement of the insertion post 25 in the second cavity 37 , the other end of the elastic hook 39 is located in the moving direction of the step 252 . The shoulder 251 moves to the slot 38 and is inserted into the slot 38 . At this time, the other end of the elastic hook 39 abuts against the step 252 . The step 252 is located within the gap 391 . Due to the abutment of the elastic hook 39 , the insertion length of the inner housing 20 into the outer housing 10 is limited. Moreover, by virtue of the cooperation between the shoulder 251 and the slot 38 , and the cooperation between the elastic hook 39 and the step 252 , the relative positions of the inner housing 20 and the outer housing 30 are fixed and maintained in the pre-assembled state. The second accommodating hole 27 is located below the first accommodating hole 36 and is opposite to the first accommodating hole 36 .

A plurality of mating connection terminals (not shown in the figure) for electrical connection can also be installed and fixed in the preassembled inner shell 20 and the outer shell 30 . A plurality of mating connecting terminals can be distributed along the length direction of the inner housing 20 and the outer housing 30 for mating with the connecting terminals 12 in the mating connector 10 . For example, a part of mating connecting terminals is inserted into the insertion hole 28 on the inner housing 20 from the direction of the top 21 of the inner housing and fixed, and another part of mating connecting terminals is inserted into the first accommodating hole 36 from the top 31 of the outer housing and fixed. The installation is fixed.

As shown in Figures 6 and 7, the pre-assembled inner housing 20 and the outer housing 30 are placed in the first chamber 11 of the mating connector 10 until the bottom end 22 of the inner housing is in the mating connector. 10 in the first cavity 11 to the final position, that is, the insertion column 25 of the inner housing 20 is completely inserted into the second cavity 37 . In this first assembly stage, the inner casing 20 enters into the first cavity 11 first. The connection terminals 12 provided in the mating connector 10 are respectively inserted into the second accommodating hole 27 and the insertion hole 28 provided on the inner housing 20 . Wherein, some of the connection terminals 12 are inserted into some of the mating connection terminals provided in the insertion hole 28 . This part of the connection terminal 12 is in contact with the part of the mating connection terminal provided in the insertion hole 28 to have a frictional force during insertion, thereby generating an insertion force in the first assembly stage. In this first assembly stage, another part of the connecting terminals 12 in the mating connector 10 is inserted into the second accommodating hole 27 , but has not yet entered the first accommodating hole 36 on the outer housing 30 . Since the second accommodating hole 27 is in clearance fit with the other part of the terminal 12 , there is no insertion force between the two. Thus, the insertion force during the first assembly stage is lower than that generated during mating of conventional connectors.

The outer housing 30 continues to exert downward force to make it move downward until the other end of the elastic hook 39 moves to the force releasing terminal 13 . The inclined surface 131 of the force releasing terminal 13 is opposite to the elastic hook 39 , so that the force releasing terminal 13 is inserted between the elastic hook 39 and the step 252 conveniently. The top of the force-resolving terminal 13 is against the elastic hook 39, and the other end of the elastic hook 39 is pushed to move toward the inner wall of the second cavity 37 (the middle position in the left-right direction shown in FIG. The top of the step 252. At this time, the outer shell 30 can continue to move downwards and be inserted into the first cavity 11 of the mating connector 10 . Continue to exert a downward force on the outer shell 30 , the shoulder 251 moves out of the slot 38 , and the outer shell 30 continues to move downward until it is completely inserted into the first cavity 11 of the mating connector 10 . In the second assembly stage when the outer shell 30 is inserted into the first cavity 11, another part of the connecting terminal 12 in the mating connector 10 is inserted into the first accommodating hole 36 from the bottom end 32 of the outer shell, and is connected with the set therein. The other part is paired with the connecting terminals. The other part of the connecting terminals 12 is in contact with another part of the mating connecting terminals disposed in the first accommodating hole 36 to have a frictional force, thereby generating an insertion force in the second assembly stage. In this second assembly stage, part of the connecting terminals 12 in the mating connector 10 have been installed in place in the insertion holes 28 on the inner housing 20 , so no insertion force is generated between the two. Therefore, the insertion force during the second assembly stage is lower than that generated during mating of conventional connectors.

As shown in FIG. 8 , both the inner housing 20 and the outer housing 30 are completely placed into the first cavity 11 of the mating connector 10 . The frictional force between part of the connection terminal 12 and the hole wall of the insertion hole 28, and the friction force between the other part of the connection terminal 12 and the hole wall of the first accommodating hole 36 keep the inner housing 20 and the outer housing 30 in the first accommodating position. cavity 11. The mating connector 10, the inner housing 20 and the outer housing 30 are assembled into a connector housing. In addition, the mating hook 14 on the mating connector 10 is located in the moving direction of the protrusion 42, and the protrusion 42 can be hooked with the mating hook 14 to further connect the outer shell 30 to the mating connector 10 .

The following describes the splitting process of the utility model.

During the pulling-out process of unmating (the sequence is opposite to that shown in FIG. 6 to FIG. 8 ), the housing 30 is first pulled upwards. Since the locking groove 38 does not catch the shoulder 251, the inner housing 20 is retained in the insertion position by the frictional force of the part of the terminals 12 on the mating connector 10, while the outer housing 30 moves upward relative to the inner housing 20 until it is shown in Fig. 7 shows the position. In this first pull-out stage, the operator only needs to apply the pull-out force corresponding to the terminal in the outer shell 30 to perform the pull-out operation, so the pull-out force required in the first pull-out stage is higher than that generated when the conventional connector is unmated. The pull-out force is small. After a certain extraction distance, the outer casing 30 is completely separated from the corresponding connecting terminal 12 . At this time, the draw-in slot 38 clamps the shoulder 251, the elastic hook 39 avoids the slope 131 provided on the top of the force-releasing terminal 13, and then steps up the step 252 on the plug post 25 again, and the inner housing 20 and the outer housing 30 are in relative positions. Pin it and stay in that state.

When the outer casing 30 is pulled upwards, the outer casing 30 drives the inner casing 20 to move upward, so that the inner casing 20 is separated from its corresponding connection terminal 12 . In the above-mentioned second pull-out stage, since the outer shell 30 has been completely separated from the corresponding connection terminal 12 at this time, the operator only needs to apply the pull-out force corresponding to the terminal in the inner shell 30 to perform the pull-out operation, so the second pull-out The pull-out force required during the unmating phase is lower than that generated during unmating of conventional connectors.

Example 2

As shown in FIG. 9 , the connector includes the connector housing in Embodiment 1, the connection terminal 12 and the mating connection terminal 50 . The connector housing includes a mating connector 10, and an inner housing 20 and an outer housing 30 preassembled as described above.

The number of mating connection terminals 50 is multiple. Part of the mating connection terminals 50 is inserted into the socket hole 28 . The mating connection terminal 50 is held in the insertion hole 28 by utilizing the frictional force between the wall of the insertion hole 28 and the mating connection terminal 50 and/or other connection holding structures, such as clips 51 . The other part of the mating connecting terminal 50 is inserted into the first accommodating hole 36 , and the frictional force and/or Other connection holding structures, such as clips 51 , hold another part of the mating connection terminal 50 in the first receiving hole 36 .

The combination of the inner housing 20 with the mating connection terminal 50 and the outer housing 30 can then be plugged into the first cavity 11 of the mating connector 10 according to the above-mentioned assembly method, and plugged into the mating connector 10 , so as to complete the electrical connection between the connection terminal 12 and the mating connection terminal 50 .

The mating connecting terminal 50 can also be installed in the first accommodating hole 36 and the insertion hole 28 by utilizing the structure in the prior art.

In the utility model, the elastic hook as the elastic retaining device is used to limit the length of the inner casing inserted into the outer casing, and the outer casing and the inner casing are relatively fixed by using the shoulder and the slot to realize the outer casing and the inner casing body pre-assembly. Then put the preassembled outer shell and the inner shell together into the first cavity of the mating connector. During the process of placing the outer shell and the inner shell together into the first cavity, the elastic hook keeps the pre-assembled state of the outer shell and the inner shell, so that the inner shell is inserted into the first cavity first. When the inner housing is fully inserted into the first cavity of the mating connector, the force-relief terminal as a force-relief device can enable the elastic hook to release the restriction on the inner and outer housings, so that the outer housing can be fully inserted into the mating connection in the first cavity in the container. When the outer shell is fully inserted into the first cavity of the mating connector, the inner shell is completely placed into the outer shell together.

In the utility model, the connector shell is divided into a mating connector, an inner shell and an outer shell as a whole. Its structural setting divides the assembly of the three into multiple processes, that is, the pre-assembly process of the outer shell and the inner shell, and the segmental assembly process of the outer shell, the inner shell and the mating connector respectively. During the assembly process, the inner shell and the outer shell are plugged with the connecting terminals in the mating connector in sequence, avoiding the large insertion when the inner shell and the outer shell are plugged with the connecting terminals in the mating connector at the same time force. For example, in the above-mentioned second assembly stage, the connecting terminal inserted into the inner housing no longer moves relative to the inner housing, so it will not be subject to frictional resistance, and the connecting terminal located in the outer housing is only affected by the mating connecting terminal in the second accommodating hole. The frictional resistance, its resistance is small. Therefore, the installation force required for the overall assembly of the utility model is small, and it can be completed manually without special tools.

The embodiments in the utility model are only used to illustrate the utility model, and do not constitute a limitation on the scope of the claims. Other substantially equivalent substitutions conceivable by those skilled in the art are all within the protection scope of the utility model.

Claims (23)

1. A connector housing, characterized in that it comprises: an outer casing, the outer casing is provided with an elastic holding device; an inner casing, the inner casing can be inserted into the outer casing, and the elastic holding device limits the length of the inner casing inserted into the outer casing; A mating connector; the mating connector is provided with a first cavity for accommodating the outer shell and the inner shell; a force-relieving device is arranged in the first cavity; During the process of inserting the outer shell and the inner shell into the mating connector, the force releasing device enables the elastic holding device to release the restriction on the inner shell. 2. The connector housing according to claim 1, wherein the elastic holding device is an elastic hook, and the inner housing is provided with a step matched with the elastic hook, and the elastic hook The insertion length of the inner casing into the outer casing is limited by abutting against the step. 3. The connector housing according to claim 2, wherein the outer housing is provided with a second cavity; the inner housing is provided with a plug-in column adapted to the second cavity; The elastic hook is set in the second cavity, and the step is set on the insertion column; when the insertion column is inserted into the second cavity, the elastic hook is located at the direction of movement of the steps. 4. The connector housing according to claim 3, wherein the elastic hook is provided with a notch, and when the elastic hook abuts against the step, the step is located in the notch. 5. The connector housing according to claim 3, wherein one end of the elastic hook is arranged on the inner wall of the second cavity, and the other end is elastically and swingably arranged in the second cavity; the elastic hook The other end of the hook can move towards the inner wall of the second cavity after being stressed, and can reset after the external force is released. 6. The connector housing according to claim 3, wherein a shoulder is provided on the plug-in post, and a slot matching the shoulder is provided in the second cavity; When the plug-in post is inserted into the second cavity, the shoulder can be inserted into the slot and can be removed from the shoulder. 7. The connector housing according to claim 6, characterized in that, along the height direction of the outer housing, the card slot is set In the middle of the second cavity; along the height direction of the inner casing, the shoulder is arranged on the upper end of the insertion post. 8. The connector housing according to claim 6, wherein the engaging groove is disposed above the elastic engaging hook. 9 . The connector housing according to claim 3 , wherein the force-resolving device is a force-relief terminal, and the force-relief terminal can be inserted into the second cavity to push the elastic hook. 10 . The connector housing according to claim 9 , wherein an inclined surface is provided at the top of the force-relief terminal, and the inclined surface is arranged opposite to the elastic hook. 11 . 11. The connector housing according to claim 9, characterized in that, when the elastic hook abuts against the step, the elastic hook does not completely abut against the step along the width direction, so There is a channel between the elastic hook and the inner wall of the second cavity that allows the force-relieving terminal to pass through; the force-relieving terminal pushes the force-relieving terminal after passing through the channel so that it no longer touches the Describe the steps. 12. The connector housing according to claim 1, characterized in that, the middle part of the outer shell along the length direction is provided with a terminal arrangement section, and the terminal arrangement section is provided with a plurality of extending along the height direction of the outer shell The first receiving hole. 13. The connector housing according to claim 12, characterized in that, the outer housing is provided with two second cavities at intervals along the length direction; the terminal arrangement section is arranged between the two second cavities; The inner housing is provided with two plug posts at intervals along the length direction. 14. The connector housing according to claim 13, wherein the inner housing is provided with a plurality of second accommodating holes; when the inner housing is inserted into the outer housing, each of the second accommodating holes The accommodating hole is opposite to one of the first accommodating holes, and the second accommodating hole is located below the first accommodating hole. 15. The connector housing according to claim 13, wherein the plurality of connection terminals are arranged in the first cavity; the outer shell and the inner shell are placed in the first cavity After entering the cavity, some of the plurality of connection terminals are inserted into the first accommodation hole, and plugged with some of the plurality of mating connection terminals in the first accommodation hole. 16. The connector housing according to claim 15, wherein the insertion post is provided with an insertion hole; after the outer shell and the inner shell are placed in the first cavity, a part The connection terminal is inserted into the insertion hole, and the connection terminal maintains the inner housing in the first cavity through a friction force with a wall of the insertion hole. 17. The connector housing according to claim 15, wherein the inner housing is provided with a plurality of second accommodating holes; when the inner housing is inserted into the outer housing, each of the second The accommodating hole is opposite to one of the first accommodating holes, and the second accommodating hole is located below the first accommodating hole; the inner housing is provided with a through hole that allows the force-resolving terminal to pass through, The force-relieving terminal passes through the through hole and abuts against the elastic holding device, so that the elastic holding device releases the restriction on the inner housing. 18. The connector housing according to claim 1, wherein the outer surface of the housing is provided with an elastic clip hook, and the elastic clip hook is provided with a protrusion protruding from the elastic clip; the mating connection The device is provided with a mating hook; the outer shell and the inner shell are placed in the first cavity, the mating hook is located in the moving direction of the bump, and the outer shell and the inner shell are placed in the first cavity. The mating connector is connected by hooking the protrusion with the mating hook. 19. The connector housing according to claim 1, wherein the outer housing is provided with a first accommodating hole for accommodating a plurality of mating connection terminals. 20. The connector housing according to claim 19, wherein a plurality of connection terminals are arranged in the mating connector, and another part of the plurality of connection terminals is inserted from one end of the first accommodating hole It is inserted into the first accommodating hole and inserted into another part of a plurality of mating connection terminals in the first accommodating hole. 21. The connector housing according to claim 1, wherein the inner housing is provided with insertion holes for accommodating mating connection terminals. 22. The connector housing according to claim 21, wherein a plurality of connection terminals are arranged in the mating connector, and some of the plurality of connection terminals are inserted into the said insertion hole from one end thereof. into the insertion hole, and to be inserted into a plurality of mating connection terminals in the insertion hole. 23. The connector, characterized in that it comprises a plurality of connecting terminals, a plurality of mating connecting terminals and the connector housing according to any one of claims 1 to 22, the connecting terminals are mounted on the mating connection In the device, the matching connecting terminals are installed in the inner housing and the outer housing.

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