Electrical connection device and plug connector

Abstract

The present invention provides an electrical connection device and a plug connector, the electrical connection device including an outlet connector and a plug connector, the outlet connector including an outlet housing, the plug connector including a plug housing and a locking device, the front end of the plug housing is inserted into the outlet housing, the outer wall of the outlet housing is provided with a first lock catch, the plug housing is provided with a first torsion bar mechanism, the first torsion bar mechanism is provided with a first lock hook, the first lock hook is engaged with the front side of the first lock catch to prevent the plug housing from moving backward relative to the outlet housing, the first torsion bar mechanism can be interlocked to disengage the first lock hook from the first lock catch by an external force, the locking device is provided with a first boss, the locking device is connected to the plug housing, and the first boss can prevent the first torsion bar mechanism from moving due to an external force. The present invention has solved the technical problem that the high voltage interlock connector has a complicated structure and high manufacturing costs.

Description

[Technical Field]

[0001] (Related Applications) This application claims priority from a Chinese patent application bearing patent application number 202111659974.7, filed on December 30, 2021, and titled "Electrical connection device and plug connector."

[0002] The present invention relates to the technical field of power electronics, in particular to electrical connection devices and plug connectors. [Background technology]

[0003] The high-voltage interlock connector includes a plug connector and a socket connector, and the plug connector is provided with terminals, and the plug connector and socket connector realize communication and disconnection of the interlock signal circuit and the power circuit. Currently, to ensure safety, the high-voltage interlock connector has a complicated structure and is expensive to manufacture. Summary of the Invention

[0004] SUMMARY OF THE INVENTION An object of the present invention is to provide an electrical connecting device and a plug connector that solves the technical problem that the high voltage interlock connector has a complicated structure and high manufacturing costs.

[0005] The above object of the present invention can be achieved by the following technical solutions.

[0006] The present invention provides an electrical connection device, the electrical connection device comprising an outlet connector and a plug connector, the outlet connector comprising an outlet housing, the plug connector comprising a plug housing and a locking device, the front end of the plug housing being inserted into the outlet housing, the outer wall of the outlet housing being provided with a first lock catch, the plug housing being provided with a first torsion bar mechanism, the first torsion bar mechanism being provided with a first lock hook, the first lock hook engaging with the front side of the first lock catch preventing the plug housing from moving rearward relative to the outlet housing, the first torsion bar mechanism being interlocked so that the first lock hook is disengaged from the first lock catch by an external force, the locking device being provided with a first boss, the locking device being connected to the plug housing, and the first boss being capable of preventing the first torsion bar mechanism from moving by the external force.

[0007] The present invention provides a plug connector, which includes a plug housing and a locking device, wherein the plug housing is provided with a first torsion bar mechanism, the first torsion bar mechanism is provided with a first locking hook, and the first torsion bar mechanism can be interlocked to move the first locking hook in response to an external force, the locking device is provided with a first boss, and the locking device is connected to the plug housing, and the positions of the locking device and the plug housing are restricted by a damper structure that can prevent the first boss from shifting from the first torsion bar mechanism, and the first boss can prevent the first torsion bar mechanism from moving in response to an external force.

[0008] The features and advantages of the present invention are as follows:

[0009] In this electrical connection device, the locking device maintains the lock between the plug housing and the receptacle housing. To unlock the electrical connection device, an operator applies an external force to move the locking device and also applies an external force to the first torsion bar mechanism, which in turn moves the first locking hook and disengages it from the first locking catch, thereby unlocking the first locking hook and the first locking catch. This electrical connection device ensures the safety of locking and disconnecting the electrical connection, is easy to operate, has a relatively simple structure, and reduces manufacturing costs.

[0010] The following drawings are intended only to explain and interpret the present invention in a general manner, and are not intended to limit the scope of the present invention. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 2 is an exploded view of the electrical connecting device according to the present invention. [Figure 2] 1 is a schematic diagram of an electrical connecting device according to the present invention in a first state; [Figure 3] 1 is a schematic diagram of an electrical connecting device according to the present invention in a first state; [Figure 4] FIG. 3 is a left side view of FIG. 2. [Figure 5] FIG. 3 is a right side view of FIG. 2. [Figure 6] FIG. 4 is a schematic diagram of the electrical connecting device according to the present invention in a second state. [Figure 7] FIG. 4 is a schematic diagram of the electrical connecting device according to the present invention in a second state. [Figure 8] FIG. 4 is a schematic diagram of the electrical connecting device according to the present invention in a second state. [Figure 9] FIG. 4 is a schematic diagram of the electrical connecting device according to the present invention in a third state. [Figure 10] FIG. 4 is a schematic diagram of the electrical connecting device according to the present invention in a third state. [Figure 11] 3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 12]3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 13] 3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 14] 3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 15] 3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 16] 3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 17] 3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 18] 3 is a schematic structural view of a plug housing in the electrical connecting device according to the present invention. FIG. [Figure 19] 3 is a schematic structural view of a socket housing in the electrical connecting device according to the present invention; FIG. [Figure 20] 1 is a schematic structural diagram of a locking device in an electrical connecting device according to the present invention; [Figure 21] 1 is a schematic structural diagram of a locking device in an electrical connecting device according to the present invention; [Figure 22] 1 is a schematic structural view of a TPA snap ring in an electrical connecting device according to the present invention. [Figure 23] 3 is a schematic structural diagram of a plug tail cover in the electrical connecting device according to the present invention. FIG. [Figure 24] 3 is a schematic structural diagram of a plug tail cover in the electrical connecting device according to the present invention. FIG. [Figure 25] FIG. 2 is a perspective view of a plug housing in the electrical connecting device according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0012] In order to more clearly understand the technical features, objects and effects of the present invention, specific embodiments of the present invention will be described with reference to the drawings. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0013] Technical solution 1 The present invention provides an electrical connection device, and as shown in Figures 1 to 12, the electrical connection device includes an outlet connector 20 and a plug connector 60, the outlet connector 20 includes an outlet housing 2, the plug connector 60 includes a plug housing 6 and a locking device 8, the front end of the plug housing 6 is inserted into the outlet housing 2, a first lock catch 201 is provided on an outer wall of the outlet housing 2, the plug housing 6 is provided with a first torsion bar mechanism 601, and the first torsion bar mechanism 601 includes a first lock hook A first lock hook 602 is provided, and when the first lock hook 602 is engaged with the front side of the first lock catch 201, the plug housing 6 is prevented from moving backward relative to the outlet housing 2, and the first torsion bar mechanism 601 can be linked so that the first lock hook 602 is disengaged from the first lock catch 201 by an external force, and the locking device 8 is provided with a first boss 804, and the locking device 8 is connected to the plug housing 6, and the first boss 804 can prevent the first torsion bar mechanism 601 from moving due to an external force.

[0014] As shown in Figures 6 to 8, after the locking device 8 is pushed forward to a predetermined position, the position of the locking device 8 becomes stable, and the first torsion bar mechanism 601 is stabilized by the first boss 804 of the locking device 8, so that the first lock hook 602 is restricted to the front side of the first lock catch 201, and the plug housing 6 cannot move rearward relative to the receptacle housing 2, and the two are locked and held together. To release the lock, the operator applies an external force to move the locking device 8 relative to the plug housing 6, causing the first boss 804 to disengage from the first torsion bar mechanism 601, and then the operator applies an external force to the first torsion bar mechanism 601, which causes the first torsion bar mechanism 601 to move the first locking hook 602 and disengage from the first locking catch 201, releasing the lock between the first locking hook 602 and the first locking catch 201, allowing the plug housing 6 to move backward relative to the outlet housing 2 and separating the plug connector 60 and the outlet connector 20. This electrical connecting device can ensure the safety of locking and cutting the electrical connection, is easy to operate, has a relatively simple structure, and reduces manufacturing costs.

[0015] In one embodiment, the positions of the locking device 8 and the plug housing 6 are restricted by a damper structure 80, which can prevent the first boss 804 from shifting from the first torsion bar mechanism 601. As shown in Figures 6 to 8, the position of the locking device 8 is stabilized by the action of the damper structure 80, and an operator can apply an external force to overcome the resistance force of the damper structure 80, thereby moving the locking device 8 relative to the plug housing 6, which causes the first boss 804 to shift from the first torsion bar mechanism 601.

[0016] As shown in Figures 1 to 18, a second lock catch 202 is provided on the outer wall of the outlet housing 2, a second torsion bar mechanism 606 is provided on the plug housing 6, a second lock hook 603 is provided on the second torsion bar mechanism 606, and the second lock hook 603 is engaged with the front side of the second lock catch 202, thereby preventing the plug housing 6 from moving rearward relative to the outlet housing 2, the second torsion bar mechanism 606 can be linked so that the second lock hook 603 is disengaged from the second lock catch 202 by an external force, the locking device 8 is provided with a second boss 805, the damper structure 80 is capable of preventing the second boss 805 from disengaging from the second torsion bar mechanism 606, and the second boss 805 is capable of preventing the second torsion bar mechanism 606 from moving due to an external force.

[0017] After the locking device 8 is pushed forward to a predetermined position, the second boss 805 of the locking device 8 stabilizes the first torsion bar mechanism 601, thereby restricting the second lock hook 603 to the front side of the second lock catch 202, and the second lock hook 603 and the first lock hook 602 both play a role in restricting the position of the plug housing 6. When unlocking, the first boss 804 displaces from the first torsion bar mechanism 601, and the second boss 805 displaces from the second torsion bar mechanism 606. At this time, the operator applies external forces to the first torsion bar mechanism 601 and the second torsion bar mechanism 606, respectively, to disengage the first lock hook 602 from the first lock catch 201 and the second lock hook 603 from the second lock catch 202, thereby releasing the lock.

[0018] The electrical connection device unlocks the high-voltage interlock connector by operating the first torsion bar mechanism 601 and the second torsion bar mechanism 606, respectively, thereby achieving a secondary locking function. When unlocking the high-voltage interlock connector, a time interval occurs between the interlock signal circuit and the power circuit, which can cause the connector to become electrically charged and become disconnected during the unlocking and disconnection process. The electrical connection device unlocks the high-voltage interlock connector twice using the first torsion bar mechanism 601 and the second torsion bar mechanism 606, allowing the plug connector 60 to be removed from the compatible outlet connector 20, thereby achieving a gradual disconnection of the high-voltage interlock and the power terminals. This prevents the disconnection caused by electrical charging and reduces the risk of seizure of the contact members or connector and injury to the vehicle and workers. The first torsion bar mechanism 601 and the second torsion bar mechanism 606 can be unlocked separately to achieve two-time separation, which is convenient to operate and can provide protection if one of them is damaged, thereby improving locking safety.

[0019] The damper structure 80 can generate a certain amount of resistance force, thereby preventing the locking device 8 from moving rearward relative to the plug housing 6, and can actuate the locking device 8 to move when an operator applies a sufficient external force to the locking device 8 to overcome the resistance force of the damper structure 80. In one embodiment, the damper structure 80 includes a first damper boss 801 provided on the locking device 8 and a second damper boss 605 provided on the plug housing 6, and a first damper slope 8011 is provided on the rear side of the first damper boss 801, and a second damper slope 6051 is provided on the front side of the second damper boss 605. As shown in FIG. 8, after the locking device 8 is pushed forward to a predetermined position, the first damper boss 801 is positioned in front of the second damper boss 605, and when the locking device 8 attempts to move rearward, the second damper boss 605 generates a resistance force against the first damper boss 801, thereby preventing the locking device 8 from moving rearward, maintaining the engagement between the first boss 804 and the first torsion bar mechanism 601, and maintaining the engagement between the second boss 805 and the second torsion bar mechanism 606. When the locking device 8 comes into contact with the first damper inclined surface 8011 and the second damper inclined surface 6051, the worker continues to increase the external force toward the rear, and the guiding action of the first damper inclined surface 8011 and the second damper inclined surface 6051 causes the locking device 8 to deform, the first damper boss 801 slides over the second damper boss 605, the locking device 8 continues to move toward the rear, and the first boss 804 shifts away from the first torsion bar mechanism 601, and the second boss 805 shifts away from the second torsion bar mechanism 606.

[0020] The damper structure 80 stabilizes the position of the locking device 8 in the plug housing 6, and allows the operator to unlock the locking device 8 by applying a sufficient external force, resulting in a simple structure, safe and reliable connection, easy operation, and low manufacturing costs.

[0021] As shown in Figures 2 and 3, when the plug connector 60 and the outlet connector 20 are not inserted, the locking device 8 is not pushed into the specified position, and the first damper boss 801 is positioned behind the second damper boss 605, so that the second damper boss 605 prevents the first damper boss 801 from moving forward, thereby restricting the position of the locking device 8.

[0022] 19 to 21, a first unlock boss 802 is provided at the front end of the locking device 8, and a second unlock boss 203 is provided on the outlet housing 2, and the second unlock boss 203 is able to push the first damper boss 801 via the first unlock boss 802 to separate it from the second damper boss 605. Specifically, when the plug connector 60 and the outlet connector 20 are inserted, the second unlock boss 203 pushes the first unlock boss 802 to lift it upward, and the first unlock boss 802 drives the first damper boss 801 to move upward, thereby allowing the first damper boss 801 to move from the rear side to the front side of the second damper boss 605.

[0023] 20 and 21, the locking device 8 further includes an unlocking arm 806, and a first unlocking boss 802 and a first damper boss 801 are both provided on the unlocking arm 806. The first unlocking boss 802 is provided in front of the first damper boss 801. When the plug connector 60 and the outlet connector 20 are inserted, the second unlocking boss 203 pushes the first unlocking boss 802 upward, causing the unlocking arm 806 to deform upward, which in turn moves the first damper boss 801 upward, making operation easy. The locking device 8 has a relatively simple structure, is easy to process, and is relatively small in size, which is advantageous for reducing the overall size of the electrical connecting device.

[0024] In one embodiment, a position restricting boss 604 that restricts the range of rearward movement of the locking device 8 is provided at the rear end of the plug housing 6. Furthermore, a position restricting groove 803 is provided at the rear end of the locking device 8, and as shown in Figures 3, 17 and 21, the position restricting boss 604 restricts the position of the position restricting groove 803 and prevents the locking device 8 from moving rearward. When the plug connector 60 and the outlet connector 20 are not inserted, the position of the locking device 8 is restricted within a set range by the position restricting boss 604 and the second damper boss 605.

[0025] 9 , the second lock hook 603 is provided on the front side of the first lock hook 602, and the second lock catch 202 is located on the front side of the first lock catch 201. In one embodiment, the distance between the second lock hook 603 and the first lock hook 602 is greater than the distance between the second lock catch 202 and the first lock catch 201, so that when the first lock hook 602 abuts against the first lock catch 201, the second lock hook 603 is located a certain distance away and on the front side of the second lock catch 202, and after the lock between the first lock hook 602 and the first lock catch 201 is released and the plug connector 60 moves a certain distance rearward, the second lock hook 603 abuts against the second lock catch 202, and the two engage and are firmly locked. The operator then performs an unlocking operation on the second torsion bar mechanism 606, thereby unlocking the second lock hook 603 and the second lock catch 202. In this electrical connecting device, the first unlocking step and the second unlocking step must be performed separately, which solves the problem of the time interval when the interlock signal circuit and the power circuit are disconnected and improves safety.

[0026] As shown in FIGS. 11 to 18 , the first lock hook 602 is provided inside the second lock hook 603. The first lock hook 602 is provided at the front end of the first torsion bar mechanism 601, and a first pressing portion 6011 is provided at the rear end of the first torsion bar mechanism 601. An operator presses the first pressing portion 6011 inward to move the first torsion bar mechanism 601, which in turn moves the first lock hook 602 outward, thereby disengaging the first lock catch 201. When the first boss 804 of the locking device 8 is located inside the first pressing portion 6011, the first pressing portion 6011 is pressed and prevented from moving inward, thereby maintaining the lock between the first lock hook 602 and the first lock catch 201.

[0027] In one embodiment, the area of ​​the pressing surface of the first pressing portion 6011 is 5 mm 2 That's all.

[0028] As shown in FIG. 12, the first pressing portion 6011 is manually pressed to disengage the first lock hook 602 from the first lock catch 201, and the plug connector 60 is pulled and moved in the direction of removal. Therefore, the area of ​​the pressing surface of the first pressing portion 6011 must be able to withstand the force of a human finger, and the minimum area of ​​this pressing surface is 5 mm. 2 For example, it may be a single flat surface with a width of 2 mm and a length of 2.5 mm, which can ensure that the first pressing portion 6011 can be pressed with a finger. The area of ​​the pressing surface should not be too large; if it is too large, it will be easily bumped or pressed during use, and when the first pressing portion 6011 is pressed, the first locking hook 602 will disengage from the first locking catch 201, causing an unintended interruption of the circuit system. The size of the area of ​​the pressing surface of the first pressing portion 6011 can be reasonably designed according to the overall dimensions of the electrical connecting device.

[0029] In order to verify the effect of the size of the pressing surface of the first pressing portion 6011 on the pressing force of the operator against the first pressing portion 6011, the inventors prepared multiple sets of samples of electrical connecting devices with the same structure and size, with each set of samples having a different size of the pressing surface of the first pressing portion 6011, for a total of 13 sets of samples, with 100 samples in each set, and an operator discontinuously pressed the pressing surface of the first pressing portion 6011 to release the first locking hook 602 from the first locking catch 201, and the success rate of the operator's single operation was recorded and recorded in Table 1. In this example, an operator's success rate of a single operation of less than 95% was deemed to be a failure.

[0030] Table 1: Influence of the area of ​​the pressing surface of the first pressing portion 6011 on the pressing force of the operator against the first pressing portion 6011

[0031] [Table 1]

[0032] As can be seen from Table 1 above, when the operator discontinuously presses the pressing surface of the first pressing portion 6011 to disengage the first lock hook 602 from the first lock catch 201, and presses the first pressing portions 6011 with different pressing surface area sizes while eliminating the influence of the operator's fatigue, the area of ​​the pressing surface of the first pressing portion 6011 is 5 mm 2 If the area of ​​the pressing surface of the first pressing portion 6011 is larger than 5 mm 2 In this case, the operator failed three times and the success rate was 97%, but it was within the acceptable range. 2 If the area of ​​the pressing surface of the first pressing portion 6011 is smaller than 5 mm, the pressing surface area of ​​the first pressing portion 6011 is too small, making it difficult for the operator to apply pressure with his / her finger, reducing the success rate of one operation and making it below the acceptable range. 2 Set it to above.

[0033] In one embodiment, the first pressing portion 6011 receives a first pressing force to move the first torsion bar mechanism 601, and interlocks with the first lock hook 602 to move it outward, thereby disengaging it from the first lock catch 201. Preferably, the first pressing force is 135 N or less.

[0034] The first torsion bar mechanism 601 has a certain elastic force, and when the first pressing portion 6011 applies a first pressing force, the first torsion bar mechanism 601 is moved to interlock with the first lock hook 602 to move outward, thereby disengaging it from the first lock catch 201, and then the first torsion bar mechanism 601 can return to its original position by its own elastic force. If the elastic force of the first torsion bar mechanism 601 is too large, a large first pressing force must be applied to deform the first torsion bar mechanism 601. In this case, when the electrical connection device needs to release the primary lock, the operator must use a large force to disengage the first lock hook 602 from the first lock catch 201, which is time-consuming and may cause some injury to the operator's fingers.

[0035] In order to verify the effect of the magnitude of the first pressing force on the pressing force of the operator against the first pressing portion 6011, the inventors prepared multiple sets of samples of electrical connecting devices with the same structure and size, with each set of samples having a different magnitude of elastic force of the first torsion bar mechanism 601, for a total of 13 sets of samples, with 100 samples per set, and the operator discontinuously pressed the first pressing portion 6011 to release the first locking hook 602 from the first locking catch 201, and the success rate of the operator's single operation was recorded and recorded in Table 2. In this example, an operator's success rate of single operation of less than 95% was deemed to be unacceptable.

[0036] Table 2: Influence of magnitude of first pressing force on pressing force of operator against first pressing portion 6011

[0037] [Table 2]

[0038] As can be seen from Table 2 above, when an operator discontinuously presses the first pressing portion 6011 to disengage the first lock hook 602 from the first lock catch 201, and presses the first pressing portion 6011 with different elastic forces while eliminating the influence of the operator's fatigue level, when the first pressing force is less than 130 N, the operation is successful in every case. When the first pressing force is 135 N, the operator fails four times, with a success rate of 96%, which is within the acceptable range. When the first pressing force exceeds 135 N, the first pressing force is too large, making it difficult for the operator to apply pressure with their finger, resulting in a decrease in the success rate per operation and falling below the acceptable range. Therefore, the inventors set the first pressing force to 135 N or less.

[0039] The second lock hook 603 is provided at the front end of the second torsion bar mechanism 606, and a second pressing portion 6061 is provided at the rear end of the second torsion bar mechanism 606. An operator presses the second pressing portion 6061 inward to move the second torsion bar mechanism 606 and interlock the second lock hook 603 to move outward, thereby disengaging the second lock catch 202. When the second boss 805 of the locking device 8 is positioned inside the second pressing portion 6061, the second pressing portion 6061 is pressed and prevented from moving inward, thereby maintaining the lock between the second lock hook 603 and the second lock catch 202.

[0040] In one embodiment, the area of ​​the pressing surface of the second pressing portion 6061 is 5 mm 2 That's all.

[0041] When the electrical connecting device needs to release the secondary lock, the second pressing portion 6061 is manually pressed to disengage the second lock hook 603 from the second lock catch 202, and the plug connector 60 is pulled and moved in the pulling direction. Therefore, the second pressing portion 6061 needs a pressing surface that can withstand the force of a human finger, and the minimum area of ​​this pressing surface is 5 mm. 2For example, the area of ​​the pressing surface may be a single flat surface with a width of 2 mm and a length of 2.5 mm, ensuring that the pressing surface can be pressed with a finger. The area of ​​the pressing surface should not be too large; if it is too large, it will be easily bumped or pressed during use. When the second pressing portion 6061 is pressed, the second locking hook 603 and the second locking catch 202 will separate, causing an unintended interruption of the circuit system. The area of ​​the pressing surface can be reasonably designed according to the overall dimensions of the electrical connecting device.

[0042] In order to verify the effect of the size of the pressing surface area on the pressure exerted by the operator on the second pressing portion 6061, the inventors prepared multiple sets of samples of electrical connecting devices with the same structure and size, with each set of samples having a different size of pressing surface area, for a total of 13 sets of samples, with 100 samples in each set, and the operator discontinuously pressed different pressing surfaces to disengage the second locking hook 603 from the second locking catch 202, and recorded the success rate of the operator's single operation, which is recorded in Table 3. In this example, an operator's success rate of single operation less than 95% was deemed to be unacceptable.

[0043] Table 3: Influence of the area of ​​the pressing surface of the second pressing portion 6061 on the pressing force of the operator against the second pressing portion 6061

[0044] [Table 3]

[0045] As can be seen from Table 3 above, when the operator discontinuously presses different pressing surfaces to disengage the second locking hook 603 from the second locking catch 202, and presses the second pressing parts 6061 with different pressing surface area sizes while eliminating the influence of the operator's fatigue, the area of ​​the pressing surface is 5 mm 2 If the area of ​​the pressed surface is larger than 5mm, the operation is successful. 2 In this case, the operator failed three times, and the success rate was 97%, which was within the acceptable range. 2If the area of ​​the pressing surface is smaller than 5 mm, the pressing surface area is too small, making it difficult for the operator to apply pressure with his / her finger, reducing the success rate of one operation and falling below the acceptable range. 2 Set it to above.

[0046] In one embodiment, the second pressing portion 6061 receives a second pressing force to move the second torsion bar mechanism 606, and interlocks with the second lock hook 603 to move it outward, thereby disengaging it from the second lock catch 202. Preferably, the second pressing force is 135 N or less.

[0047] To verify the effect of the magnitude of the second pressing force on the pressing force of the operator on the second pressing portion 6061, the inventors selected multiple sets of samples of electrical connecting devices with the same structure and size, and each set of samples had a different magnitude of the second pressing force of the second pressing portion 6061, for a total of 13 sets of samples, with 100 samples in each set. The operator discontinuously pressed the second pressing portion 6061 to release the second locking hook 603 from the second locking catch 202, and the success rate of the operator's single operation was recorded and recorded in Table 4. In this example, an operator's success rate of a single operation of less than 95% was deemed to be unsuccessful.

[0048] Table 4: Influence of magnitude of second pressing force on pressing force of operator against second pressing portion 6061

[0049] [Table 4]

[0050] As can be seen from Table 4 above, when an operator discontinuously presses the second pressing portion 6061 to disengage the second lock hook 603 from the second lock catch 202, eliminating the influence of operator fatigue, and pressing the second pressing portion 6061 with different magnitudes of second pressing force, when the second pressing force is less than 130 N, the operation is successful every time. When the second pressing force is 135 N, the operator fails three times, with a success rate of 97%, which is within the acceptable range. When the second pressing force exceeds 135 N, the second pressing force is too large, making it difficult for the operator to apply pressure with their finger, resulting in a decrease in the success rate per operation and falling below the acceptable range. Therefore, the inventors set the second pressing force to 135 N or less.

[0051] 6 to 8 and 25, the second torsion bar mechanism 606 is provided with a pressing through-hole 6062, the first torsion bar mechanism 601 is provided inside the second torsion bar mechanism 606, and the first pressing portion 6011 is provided in the pressing through-hole 6062. The first torsion bar mechanism 601 and the second torsion bar mechanism 606 are both provided in the plug housing 6 and are independent of each other. The locking device 8 is connected to the plug housing 6 to achieve a secondary locking function, and the structure is relatively simple, the number of parts is reduced, the operation is convenient, the connection is safe and reliable, and the manufacturing cost is low. Preferably, the first torsion bar mechanism 601 and the second torsion bar mechanism 606 are integral with the plug housing 6.

[0052] In one embodiment, the number of times of insertion and removal between the outlet connector 20 and the plug connector 60 is 9 or more.

[0053] Because the high-voltage connection device requires assembly of the outlet connector 20 and the plug connector 60, and because subsequent maintenance or component removal may require separating the outlet connector 20 and the plug connector 60 before insertion and removal, the number of insertions and removals between the outlet connector 20 and the plug connector 60 must not be less than nine times. If the number of insertions and removals is less than nine, the outlet connector 20 and the plug connector 60 may be damaged during a certain removal or maintenance process, and may no longer be able to conduct current, requiring the entire electrical connection device, including the wire harness, to be replaced, which not only increases maintenance time but also maintenance costs. For this reason, the selection of materials for the outlet connector 20 and the plug connector 60, and the design of the insertion / removal mechanism, locking mechanism, and sealing mechanism between the outlet connector 20 and the plug connector 60, must be able to withstand at least nine removals and removals in order to meet the usage requirements of the electrical connection device.

[0054] In one embodiment, the plug connector 60 weighs 305 g or less.

[0055] Generally, the outlet connector 20 is fixed in the environment where it is used, and the plug connector 60 is positioned above the electrical connection device and inserted into and fixed with the outlet connector 20. If the weight of the plug connector 60 is too heavy, the outlet connector 20 will also be subjected to a large amount of gravity. If the power receiving device vibrates, the entire electrical connection device will follow the vibration, and the plug connector 60 will be subjected to large vibrations due to inertia, which may cause abnormal noise. On the other hand, the generation of abnormal noise is unacceptable when the electrical connection device is in use.

[0056] In order to verify the effect of the weight of the plug connector 60 on the generation of abnormal noise in the electrical connection device, the inventors prepared samples of electrical connection devices assembled from the same outlet connector 20 and plug connectors 60 of different weights, attached them to a vibration test stand, and performed a vibration test to observe whether or not the plug connector 60 generated abnormal noise during the vibration test. The verification results are shown in Table 5.

[0057] Table 5: Effect of weight of plug connector 60 on generation of abnormal noise of the electrical connecting device

[0058] [Table 5]

[0059] As can be seen from Table 5, when the weight of the plug connector 60 exceeded 305 g, the plug connector 60 generated abnormal noise during the vibration test and failed the verification. Therefore, the inventors set the weight of the plug connector 60 to 305 g or less.

[0060] In one embodiment, the height of the plug connector 60 along the insertion / removal direction is 208 mm or less.

[0061] After the outlet connector 20 and the plug connector 60 are assembled, they need to be installed in the power receiving environment. However, since the space provided in advance in the power receiving environment is generally small, if the plug connector 60 is too high, firstly, it cannot be installed in the power receiving environment, and secondly, it will result in a waste of raw materials, so the plug connector 60 needs to be lower than a certain height during design.

[0062] In order to verify the influence of the height of the plug connector 60 in the insertion / removal direction on the installation status of the electrical connection device, the inventors prepared samples of electrical connection devices assembled from the same outlet connector 20 and plug connectors 60 with different heights in the insertion / removal direction, installed them on the power receiving device, and observed whether the plug connector 60 interfered with other components in the power receiving environment during installation. The verification results are shown in Table 6.

[0063] As can be seen from Table 6, when the height of the plug connector 60 in the insertion / removal direction exceeds 208 mm, it cannot be attached to the specified position of the electrical connecting device and fails the test. Therefore, the inventors set the height of the plug connector 60 in the insertion / removal direction to 208 mm or less.

[0064] Table 6: Influence of height of plug connector 60 along the insertion / removal direction on the installation status of the electrical connection device

[0065] [Table 6]

[0066] The method of using the electrical connection device includes a locking step and an unlocking step.

[0067] The lock step includes: (1) after the plug connector 60 and the outlet connector 20 are inserted, the second unlock boss 203 pushes up the first unlock boss 802, at which time the position restriction effect of the second position restriction boss 604 on the first damper boss 801 is eliminated, making it possible to push the locking device 8 forward; and (2) after the locking device 8 is pushed to a predetermined position, the first lock catch 201 and the first lock hook 602 engage and are firmly locked, and at the same time the first boss 804 abuts against the first pressing portion 6011 of the first torsion bar mechanism 601 and the second boss 805 abuts against the second pressing portion 6061 of the second torsion bar mechanism 606, making it impossible to unlock the primary lock and the secondary lock.

[0068] The unlocking steps include: (1) pulling out the locking device 8 in the rearward direction; (2) pressing down the first pressing portion 6011 to unlock the plug connector 60 rearward, at which time the first lock hook 602 and the first lock catch 201 are unlocked; (3) subsequently unlocking the plug connector 60 rearward, at which time the second lock hook 603 and the second lock catch 202 engage and are firmly locked; and (4) pressing down the second pressing portion 6061 to subsequently unlock the plug connector 60 rearward, at which time the second lock hook 603 and the second lock catch 202 are unlocked.

[0069] In one embodiment, the outlet housing 2 is provided with at least two guide posts 204, and as shown in FIG. 19, the second lock catch 202 is provided on the guide post 204, and the first lock catch 201 is provided between the at least two guide posts 204, and as shown in FIG. 19, the two guide posts 204 are each provided with a second lock catch 202, and the two second lock catches 202 are arranged on both sides of the first lock catch 201, so that the second lock hooks 603 on the plug housing 6 engage with the second lock catches 202 on both sides, improving the reliability of the engagement and secure locking.

[0070] Considering that the plug connector 60 and the socket connector 20 are frequently plugged and unplugged during use, the terminals are likely to fall off under the force applied during plugging and unplugging, and if the positioning structure becomes ineffective, the contact members may come off and the connector may become ineffective. Furthermore, during use, the connector is subjected to vibration and swing, which may cause the wire harness 13 at the tail portion of the plug connector 60 to yaw for a long period of time, increasing the force applied to the terminals and increasing the risk of water leakage. Therefore, the inventor further improved the electrical connecting device, namely, the plug housing 6 is provided with a shielded outer crimp sleeve 11, a shielded inner crimp sleeve 12 and a TPA snap ring 9, the shielded outer crimp sleeve 11 and the shielded inner crimp sleeve 12 are crimped onto the outside of the shield layer of the wire harness 13, and the TPA snap ring 9 is fitted onto the shielded outer crimp sleeve 11, and the TPA snap ring 9 is fitted onto the shielded outer crimp sleeve 11 and the shielded inner crimp sleeve 12 of the wire harness 13 to prevent the terminals from backing out.

[0071] A plug tail cover 10 is connected to the rear end of the plug housing 6. The plug tail cover 10 is provided with a tail seal ring that fits with the plug housing 6. The TPA snap ring 9, plug tail cover 10, tail seal ring, shielded outer crimp sleeve 11, and shielded inner crimp sleeve 12 cooperate to limit yawing of the tail wire harness 13 and avoid the risk of water leakage. The TPA snap ring 9 is attached before the plug tail cover 10 and serves to secondarily lock the shielded outer crimp sleeve 11, shielded inner crimp sleeve 12, and wire harness 13 to prevent them from loosening. As shown in FIG. 22 , the TPA snap ring 9 has a snap ring opening 91 that confines the wire harness 13 and has a width smaller than the diameter of the shielded outer crimp sleeve 11. The plug tail cover 10 and tail seal ring are integrally injection molded, and the tail seal ring fits into the plug housing 6, thereby reducing the number of parts, lowering costs, and providing excellent positioning control for the wire harness 13, thereby reducing the risk of malfunction.

[0072] The wire harness 13 is connected to the rear end of the plug housing 6, and the shielded outer crimp sleeve 11 and the shielded inner crimp sleeve 12 are fitted onto the wire harness 13. As shown in Figures 1 to 24, the outlet connector 20 further includes a rubber gasket 1 connected to the rear end of the outlet housing 2. The plug connector 60 further includes a cover plate 3, a plug insulator 4, a short-circuiting pin 5, and a head base seal ring 7, all of which are fixedly provided within the plug housing 6. The plug connector 60 can be assembled by the following procedure.

[0073] (1) a step of sheathing a plug shield on a plug insulator 4; (2) Next, the step of attaching the shorting pin 5 to the plug insulator 4; (3) incorporating the assembled plug insulator 4 into the plug housing 6; (4) installing the head base seal ring 7; (5) mounting the cover plate 3; (6) a step of placing the plug tail cover 10 on the wire harness; (7) stripping the wire harness as necessary, and then crimping the terminals, the shielded outer crimp sleeve 11, and the shielded inner crimp sleeve 12; (8) mounting a TPA snap ring 9 on the crimped wire harness, and then assembling the wire harness assembly into a plug connector 60.

[0074] Technical solution 2

[0075] The present invention provides a plug connector, and as shown in Figures 11 to 18, the plug connector includes a plug housing 6 and a locking device 8, the plug housing 6 is provided with a first torsion bar mechanism 601 having a first locking hook 602 installed thereon, the first torsion bar mechanism 601 being capable of moving and interlocking the first locking hook 602 by an external force, the locking device 8 being provided with a first boss 804, the locking device 8 being connected to the plug housing 6 and its position being regulated by a damper structure 80, the damper structure 80 being capable of preventing the first boss 804 from shifting from the first torsion bar mechanism 601, and the first boss 804 being capable of preventing the first torsion bar mechanism 601 from moving by an external force. The plug connector is connected to a mating outlet connector, and the lock between the plug housing 6 and the outlet housing 2 is maintained by the locking device 8. To release the lock, the operator applies an external force to overcome the resistance of the damper structure 80, and also applies an external force to the first torsion bar mechanism 601, which then moves the first locking hook 602 to release the lock. This ensures the safety of locking and cutting the electrical connection, is easy to operate, has a relatively simple structure, and reduces manufacturing costs.

[0076] The above are merely illustrative specific embodiments of the present invention and do not limit the scope of the present invention. Any equivalent modifications and alterations made by those skilled in the art without departing from the spirit and principles of the present invention should fall within the scope of protection of the present invention.

Claims

1. In the electrical connection device, including a socket connector and a plug connector, The outlet connector includes an outlet housing, and the plug connector includes a plug housing and a locking device, and a front end of the plug housing is inserted into the outlet housing; a first lock catch is provided on an outer wall of the outlet housing, a first torsion bar mechanism is provided on the plug housing, and a first lock hook is provided on the first torsion bar mechanism; when the plug housing and the outlet housing are locked together, the first lock hook is engaged with the front side of the first lock catch, thereby preventing the plug housing from moving rearward relative to the outlet housing; and the first torsion bar mechanism can be interlocked so that the first lock hook can be disengaged from the first lock catch by an external force; the locking device is provided with a first boss, the locking device is connected to the plug housing, and the first boss is capable of preventing the first torsion bar mechanism from moving due to an external force; a second lock catch is provided on an outer wall of the outlet housing, a second torsion bar mechanism is provided on the plug housing, and a second lock hook is provided on the second torsion bar mechanism; when the lock between the first lock hook and the first lock catch is released and the plug connector moves rearward by a certain distance, the second lock hook engages with the front side of the second lock catch, thereby preventing the plug housing from moving rearward relative to the outlet housing; and the second torsion bar mechanism can be interlocked so that the second lock hook can be disengaged from the second lock catch by an external force, The second locking hook is provided in front of the first locking hook. Electrical connection device.

2. The positions of the locking device and the plug housing are restricted by a damper structure that can prevent the first boss from shifting from the first torsion bar mechanism.

2. The electrical connecting device according to claim 1.

3. The locking device is provided with a second boss, and the damper structure is capable of preventing the second boss from being displaced from the second torsion bar mechanism, and the second boss is capable of preventing the second torsion bar mechanism from moving due to an external force.

3. The electrical connecting device according to claim 2.

4. The damper structure includes a first damper boss provided on the locking device and a second damper boss provided on the plug housing, and a first damper slope is provided on the rear side of the first damper boss, and a second damper slope is provided on the front side of the second damper boss.

4. The electrical connecting device according to claim 2 or 3.

5. the second damper boss is capable of preventing the first damper boss from moving forward, A first unlocking boss is provided at the front end of the locking device, and a second unlocking boss is provided on the outlet housing, and the second unlocking boss can push the first damper boss through the first unlocking boss to separate it from the second damper boss.

5. The electrical connecting device according to claim 4.

6. The distance between the second locking hook and the first locking hook is greater than the distance between the second locking catch and the first locking catch.

2. The electrical connecting device according to claim 1.

7. The first locking hook is provided inside the second locking hook.

2. The electrical connecting device according to claim 1.

8. The outlet housing is provided with at least two guide posts, the second locking catch is provided on the guide posts, and the first locking catch is provided between the at least two guide posts.

4. The electrical connecting device according to claim 3.

9. The plug housing is provided with a shielded outer crimp sleeve, a shielded inner crimp sleeve, and a TPA snap ring, the shielded outer crimp sleeve and the shielded inner crimp sleeve are crimped onto the outside of the shield layer of the wire harness, and the TPA snap ring is fitted onto the shielded outer crimp sleeve.

2. The electrical connecting device according to claim 1.

10. The TPA snap ring has a snap ring opening whose width is less than the diameter of the shield outer crimp sleeve.

10. The electrical connecting device according to claim 9.

11. A plug tail cover is connected to the rear end of the plug housing, and a tail seal ring is connected to the plug tail cover by injection molding, and the tail seal ring is fitted to the plug housing. The electrical connecting device according to claim 10.

12. the first lock hook is provided at a front end of the first torsion bar mechanism, and a first pressing portion is provided at a rear end of the first torsion bar mechanism; The second lock hook is provided at the front end of the second torsion bar mechanism, a second pressing portion is provided at the rear end of the second torsion bar mechanism, a pressing through hole is provided in the second torsion bar mechanism, the first torsion bar mechanism is provided inside the second torsion bar mechanism, and the first pressing portion is provided in the pressing through hole.

4. The electrical connecting device according to claim 3.

13. A position restricting boss is provided at the rear end of the plug housing to restrict the range of rearward movement of the locking device.

2. The electrical connecting device according to claim 1.

14. In the plug connector, a plug housing and a locking device; a first torsion bar mechanism is provided on the plug housing, and a first locking hook is provided on the first torsion bar mechanism, and the first torsion bar mechanism can be interlocked to move the first locking hook in response to an external force; and when the plug housing and the outlet housing of the inserted outlet connector are locked together, the first locking hook is engaged with a front side of a first locking catch on the outlet housing, thereby preventing the plug housing from moving rearward relative to the outlet housing; the locking device is provided with a first boss, the locking device is connected to the plug housing, the positions of the locking device and the plug housing are restricted by a damper structure that can prevent the first boss from shifting from the first torsion bar mechanism, and the first boss can prevent the first torsion bar mechanism from moving due to an external force, a second torsion bar mechanism is provided on the plug housing, and a second lock hook is provided on the second torsion bar mechanism; after the lock between the first lock hook and the first lock catch is released and the plug connector moves rearward by a certain distance, the second lock hook engages with the front side of a second lock catch provided on the outer wall of the outlet housing, thereby preventing the plug housing from moving rearward relative to the outlet housing; and the second torsion bar mechanism can be interlocked so that the second lock hook can be disengaged from the second lock catch by an external force, The second locking hook is provided in front of the first locking hook. Plug connector.

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