Rotary switch-on type electric connector and first connector thereof

Abstract

The utility model discloses a rotary connection type electric connector and a first connector thereof. The first connector comprises a first body and a plurality of first electric terminals assembled on the first body. The first electrical terminal is provided with a contact surface which is exposed outwards from the plug-in end of the first body; an insulating layer is arranged at a local position of a contact surface of a part of the first electrical terminals, and the insulating layer is contacted with a second electrical terminal in the second connector when the first body and the second connector are correctly inserted to a first position. According to the first connector provided by the utility model, the insulating layer is arranged at the local position of the contact surface of part of the first electrical terminals, so that the first connector can be ensured not to be electrified before contact in place and to be electrified after rotating and matching in place for contact, the effect of protecting a circuit is achieved, and the use safety and stability of a product are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electrical connection, in particular to a rotary connection type electrical connector and a first connector thereof. Background Art

[0002] As is known to all, electronic connectors are widely used in electronic products to achieve electrical connections between electronic components to meet the requirements of charging and discharging or data transmission.

[0003] Among them, in the existing electronic connector, it includes a male connector and a female connector that are mated together. The electrical terminals of the female connector and the male connector are electrically connected by mating the female connector and the male connector.

[0004] However, in existing electronic connectors, both the male connector and the female connector have multiple electrical terminals. Therefore, during the plug-in process of the male connector and the female connector, all the electrical terminals on the male connector and all the electrical terminals on the female connector are electrically contacted at the same moment, causing damage to the circuit, resulting in the defects of poor stability and safety of existing electronic connectors.

[0005] Therefore, there is an urgent need for a rotary-connection electrical connector and a first connector thereof to overcome one or more of the above-mentioned drawbacks. Utility Model Content

[0006] One object of the present invention is to provide a first connector of a rotary-connection electrical connector, which can ensure that no power is applied before the first connector is in contact, and that power is applied after the first connector is rotated and mated into contact, thereby protecting the circuit and improving the safety and stability of the product.

[0007] Another object of the present invention is to provide a rotary-connection electrical connector that can ensure that no power is applied before the contacts are in place, and that power is applied after the contacts are rotated and mated, thereby protecting the circuit and improving the safety and stability of the product.

[0008] To achieve the aforementioned objectives, the present invention provides a rotary-connect electrical connector, wherein a first connector and a second connector of the rotary-connect electrical connector are mated and rotatably connected, and includes a first body and a plurality of first electrical terminals mounted on the first body. The first electrical terminals have contact surfaces that are exposed from the mating end of the first body, and an insulating layer is provided on a portion of the contact surfaces of some of the first electrical terminals. The insulating layer contacts the second electrical terminals in the second connector when the first body and the second connector are properly mated and in a first position.

[0009] Compared with the prior art, an insulating layer is provided on a local position of the contact surface of part of the first electrical terminal, which can ensure that no power is applied before contact is in place, and power is applied after the rotation and mating are in place, thereby protecting the circuit and improving the safety and stability of the first connector of the electrical connector of the utility model.

[0010] Preferably, a plug-in guide structure is provided on the plug-in end of the first body for correctly plugging the first body and the second connector.

[0011] Preferably, the plug-in guide structure is a protrusion laterally protruding on the plug-in end of the first body; or, the plug-in end of the first body is provided with an plug-in cavity, and the contact surface of the first electrical terminal is exposed in the plug-in cavity, and the plug-in guide structure is an plug-in guide groove provided on the side cavity wall of the plug-in cavity and extending along the plug-in direction of the first body.

[0012] Preferably, the insulating layer is a PVD insulating layer.

[0013] Preferably, a side cavity wall of the inserting cavity is further provided with a rotation guide groove which is connected with the inserting guide groove and extends along the rotation direction of the first body.

[0014] Preferably, a buckling structure is provided on the groove wall of the protrusion or the rotation guide groove, and the buckling structure on the rotation guide groove is located on a groove wall on one side of the rotation guide groove that is separated in the insertion direction of the first body and adjacent to the cavity opening of the insertion cavity.

[0015] Preferably, the buckling structure is a buckling recessed along the insertion direction of the first body, or the buckling structure is a buckling protrusion raised along a direction opposite to the insertion direction of the first body.

[0016] To achieve the above-mentioned purpose, the rotary-connected electrical connector of the present invention includes a first connector and a second connector that are plugged in and rotatably connected. The first connector includes a first body and a plurality of first electrical terminals assembled on the first body, the first electrical terminals having contact surfaces exposed from the plug-in end of the first body; the second connector includes a second body and a plurality of second electrical terminals assembled on the second body, the second electrical terminals having contact heads exposed from the plug-in end of the second body; the contact heads of some of the second electrical terminals are insulated and separated from the contact surfaces of the corresponding first electrical terminals when the second body and the first body are correctly plugged in to the first position, and the contact heads of all the second electrical terminals are in electrical contact with the contact surfaces of the corresponding first electrical terminals when the second body and the first body are rotated relative to each other to the second position.

[0017] Compared with the prior art, some of the contact heads of the second electrical terminals are insulated and separated from the contact surfaces of the corresponding first electrical terminals when the second body and the first body are correctly inserted into the first position. All the contact heads of the second electrical terminals are electrically contacted with the contact surfaces of the corresponding first electrical terminals when the second body and the first body are relatively rotated to the second position. This ensures that no power is applied before contact is in place, and power is applied after the rotation and mating are in place, thereby protecting the circuit and improving the safety and stability of the use of the electrical connector of the present invention.

[0018] Preferably, an insulating layer is provided on a local position of the contact surface of a portion of the first electrical terminals, and the insulating layer is in contact with the contact head when in the first position.

[0019] Preferably, an insertion guide structure and a rotation guide structure connected to the insertion guide structure are provided on the insertion end of one of the first body and the second body, and a matching sliding structure that can slide along the insertion guide structure and the rotation guide structure is provided on the insertion end of the other of the first body and the second body. With the help of the matching sliding structure, the second body and the first body are correctly inserted into the first position by sliding along the insertion guide structure until they are aligned with the rotation guide structure. With the help of the matching sliding structure, the second body and the first body are relatively rotated to the second position.

[0020] Preferably, a mating cavity is provided at the mating end of the first body, and the contact surface of the first electrical terminal is exposed in the mating cavity. The mating guide structure is a mating guide groove provided on the side wall of the mating cavity and extending along the mating direction of the first body. The rotation guide structure is a rotation guide groove provided on the side wall of the mating cavity and connected to the mating guide groove. The rotation guide groove extends along the rotation direction of the first body. The matching sliding structure is a protrusion laterally protruding on the mating end of the second body.

[0021] Preferably, at least one of the first electrical terminal and the second electrical terminal is a telescopic probe that can be extended and retracted in a direction parallel to the plug-in direction, and a snap-fitting protrusion is provided on the groove wall and the protrusion of the rotation guide groove, and a snap-fitting recess is provided on the groove wall and the protrusion of the rotation guide groove. The snap-fitting protrusion or the snap-fitting recess on the rotation guide groove is located on the groove wall on one side of the rotation guide groove that is separated in the plug-in direction of the first body and adjacent to the cavity opening of the plug-in cavity. When the snap-fitting protrusion is in the second position, it is snapped together with the snap-fitting recess by means of the extension and retraction between the first electrical terminal and the second electrical terminal.

[0022] Preferably, the insulating layer is a PVD insulating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of the electrical connector of the present invention when the first connector and the second connector are plugged in and rotated to connect.

[0024] Figure 2 yes Figure 1 A view of an interior sectioned by a plane passing through its centerline.

[0025] Figure 3 yes Figure 1 The electrical connector is shown as an exploded perspective view when the first connector and the second connector are separated.

[0026] Figure 4 It is a three-dimensional diagram of the first connector in the electrical connector of the present invention.

[0027] Figure 5 yes Figure 4 The internal view of the first connector is shown, and the cutting plane of the internal view is formed by the center line of the first electrical terminal at the center and the center line of the first electrical terminal where the insulating layer is located.

[0028] Figure 6 It is a three-dimensional view of the second connector in the electrical connector of the present invention.

[0029] Figure 7 yes Figure 6 An internal view cut through a plane passing through the center line of the contact head indicated by the reference numeral and viewed rearward.

[0030] Figure 8 yes Figure 6 A three-dimensional image from another angle.

[0031] Figure 9 This is a diagram showing a state in which the second connector of the electrical connector of the present invention is correctly aligned with the first connector along the direction indicated by arrow A and is not inserted into the first connector.

[0032] Figure 10 The diagram shows the state when the second connector of the electrical connector of the present invention is inserted along the direction indicated by arrow A until the matching sliding structure just enters the plug-in guide structure.

[0033] Figure 11 It is a diagram showing the state when the second connector in the electrical connector of the present invention continues to be inserted along the direction indicated by arrow A until the matching sliding structure slides to the first position.

[0034] Figure 12 yes Figure 11 State diagram after hiding the second entity.

[0035] Figure 13 yes Figure 11 The state diagram when it is rotated to the second position in the direction indicated by the arrow inside.

[0036] Figure 14 Use a dotted line to Figure 13 The internal structure is shown in the state diagram.

[0037] Figure 15 yes Figure 13 State diagram after hiding the second entity. DETAILED DESCRIPTION

[0038] In order to explain the technical content and structural features of the present invention in detail, the following is a further description in conjunction with the embodiments and the accompanying drawings.

[0039] See also Figure 1 and Figure 3 The rotary-connected electrical connector 100 of the present invention includes a first connector 10 and a second connector 20 that are plugged in and rotated to connect.

[0040] Recombination Figures 4 and 5 The first connector 10 includes a first body 11 and seven first electrical terminals 12 assembled on the first body 11; Figure 3 and Figure 4 As an example, all the first electrical terminals 12 are separated from each other, and among all the first electrical terminals 12, one first electrical terminal 12 is located at the center of the first body 11, and the rest are arranged around the first electrical terminal 12 located at the center of the first body 11, so that the arrangement of all the first electrical terminals 12 on the first body 11 is more reasonable and more compact, so as to adapt to the arrangement requirements of the first body 11 having a circular shape; in addition, each first electrical terminal 12 also extends along the plug-in direction of the first body 11, and the state is shown in FIG. Figure 2 and Figure 5 As shown, the first electrical terminal 12 is a linear terminal; obviously, according to actual needs, the number of the first electrical terminals 12 can also be two, three, four, five or six, the shape of the first electrical terminals 12 can also be other, and the arrangement of all the first electrical terminals 12 on the first body 11 can also be other, so it is not limited to Figures 2 to 5 Limits shown.

[0041] At the same time, the first electrical terminal 12 has a contact surface 121 exposed from the plug end 11a of the first body 11 to meet the need for electrical contact between the first electrical terminal 12 and the second electrical terminal 22 described below; Figure 4As an example, among all the first electrical terminals 12, only one first electrical terminal 12 has an insulating layer 122 provided on a local position of the contact surface 121. Obviously, according to actual needs, two, three, four, five or six first electrical terminals 12 may each have an insulating layer 122 provided on a local position of the contact surface 121. That is to say, the number of first electrical terminals 12 provided with insulating layers 122 does not exceed the total number of the first electrical terminals 12. Therefore, Figure 4 in addition, the insulating layer 122 is a PVD insulating layer, ie, a physical vapor deposition insulating layer, which can provide reliability and wear resistance requirements while playing the insulating function.

[0042] Furthermore, the plug-in guide structure 111 and the rotation guide structure 112 connected to the plug-in guide structure 111 are provided on the plug-in end 11a of the first body 11; Figure 3 、 Figure 4 and Figure 9 As an example, the plug-in end 11a of the first body 11 is provided with a plug-in cavity 11b, and the contact surface 121 of the first electrical terminal 12 is exposed in the plug-in cavity 11b; the plug-in guide structure 111 is a plug-in guide groove provided on the side cavity wall 113 of the plug-in cavity 11b, and the plug-in guide groove 111 extends along the plug-in direction of the first body 11; the rotation guide structure 112 is a rotation guide groove provided on the side cavity wall 113 of the plug-in cavity 11b and connected to the plug-in guide groove 111, and the rotation guide groove 112 extends along the rotation direction of the first body 11 (the rotation direction is Figure 11 and Figure 12 The second body 21 extends in the direction indicated by the double arrows to meet the need of inserting the plug-in end 21a of the second body 21 (described below) into the plug-in end 11a of the first body 11 and rotating within the plug-in end 11a of the first body 11 during the plug-in process.

[0043] Recombination Figure 6 and Figure 8 The second connector 20 includes a second body 21 and seven second electrical terminals 22 assembled on the second body 21. The second electrical terminals 22 have contact heads 221 exposed from the plug-in end 21a of the second body 21 to meet the contact and matching needs between the contact heads 221 and the contact surface 121. In addition, the plug-in end 21a of the second body 21 is provided with a sliding structure 211 that can slide along the plug-in guide structure 111 and the rotation guide structure 112. Optionally, Figure 6 and Figure 8 As an example, the sliding structure 211 is a protrusion laterally protruding from the plug-in end 21 a of the second body 21 , so that the protrusion 211 can slide along the plug-in guide groove 111 and the rotation guide groove 112 .

[0044] Therefore, when the sliding structure 211 slides along the plug-in guide structure 111 to the position shown in FIG. Figure 11 When the first position is aligned with the rotation guide structure 112, the first body 11 and the second connector 20 are correctly plugged into the first position. At this time, the contact head 221 of the second electrical terminal 22 contacts the insulating layer 122 on the contact surface 121 of the corresponding first electrical terminal 12, achieving the purpose of insulating and isolating the contact head 221 of the second electrical terminal 22 from the contact surface 121 of the first electrical terminal 12. Figure 12 As shown. When the sliding structure 211 slides along the rotating guide structure 112 to Figure 13 When the second body 21 and the first body 11 are rotated relative to each other to the second position, the contact heads 221 of all the second electrical terminals 22 are in electrical contact with the contact surfaces 121 of the corresponding first electrical terminals 12. Figure 15 shown.

[0045] It should be noted that since the second electrical terminal 22 is electrically connected to the first electrical terminal 12, when "all the first electrical terminals 12 are separated from each other, and among all the first electrical terminals 12, one first electrical terminal 12 is located at the center of the first body 11, and the rest are arranged around the first electrical terminal 12 located at the center of the first body 11", correspondingly, all the second electrical terminals 22 are also separated from each other, and among all the second electrical terminals 22, one second electrical terminal 22 is located at the center of the second body 21, and the rest are arranged around the second electrical terminal 22 located at the center of the second body 21. Figure 6 and Figure 8 As shown. Alternatively, depending on actual needs, in other embodiments, the insertion end 21a of the second body 21 may be provided with the insertion guide structure 111 and the rotation guide structure 112, while the insertion end 11a of the first body 11 may be provided with the sliding structure 211. Therefore, the present invention is not limited to the drawings. Furthermore, depending on actual needs, the insertion guide structure 111, the rotation guide structure 112, and the sliding structure 211 may be omitted. In this case, the operator controls the second body 21 and the first body 11 to ensure that the second body 21 and the first body 11 are correctly inserted into the first position and rotated relative to each other to the second position.

[0046] More specifically, as follows:

[0047] Combine Figure 5 and Figure 7As an example, the second electrical terminal 22 is a telescopic probe, the telescopic direction of the telescopic probe is parallel to the plug-in direction, and the first electrical terminal 12 is an integrated pin; this design ensures that the first connector 10 and the second connector 20 still have a certain matching gap when the sliding structure 211 is at the rotation guide structure 112, so that when continuing to press down, the matching gap difference is utilized. Figure 2 The middle mark P indicates that the buckling or disengagement between the buckling protrusion 212 and the buckling recess 114 described below is satisfied; in addition, the buckling Figure 3 、 Figure 4 and Figure 8 As an example, a snap-fitting protrusion 212 is provided on the protrusion 211, and a snap-fitting recess 114 is provided on the groove wall of the rotation guide groove 112. The snap-fitting recess 114 on the rotation guide groove 112 is located on a side groove wall 112a of the rotation guide groove 112 separated in the insertion direction of the first body 11, and the side groove wall 112a is adjacent to the cavity opening 11c of the pair of insertion cavities 11b; when the snap-fitting protrusion 212 is in the second position, it is snapped together with the snap-fitting recess 114 by means of the expansion and contraction (i.e., compression and rebound force) between the first electrical terminal 12 and the second electrical terminal 22. The state in which the snap-fitting protrusion 212 and the snap-fitting recess 114 are snapped together is shown in FIG. Figure 14 As shown in the enlarged figure; therefore, with the help of the cooperation between the fastening protrusion 212 and the fastening recess 114, a more stable fastening force is provided to prevent the first connector 10 and the second connector 2 from being loosened or pulled out, so that the first connector 10 and the second connector 20 are reliably fastened together after being connected to meet the use requirements; in addition, under the maintenance of a certain reaction force generated between the first electrical terminal 12 and the second electrical terminal 22, the stability of the contact between the first electrical terminal 12 and the second electrical terminal 22 is also guaranteed. Specifically, Figure 3 As an example, the fastening recess 114 is recessed along the insertion direction of the first body 11, and the fastening protrusion 212 is raised along the insertion direction of the first body 11, so as to better meet the needs of the fastening protrusion 212 being engaged with the fastening recess 114 along the insertion direction of the first body 11, and the fastening protrusion 212 being disengaged from the fastening recess 114 along the insertion direction of the second body 11. It is understandable that although Figure 3 It is shown that the engaging protrusion 212 is provided by the protrusion 211 and the engaging recess 114 is provided by the groove wall of the rotation guide groove 112. Obviously, according to actual needs, the positions of the engaging protrusion 212 and the engaging recess 114 can be reversed, that is, the engaging protrusion 212 can be provided by the groove wall of the rotation guide groove 112 and the engaging recess 114 can be provided by the protrusion 211. Figure 3 In addition, although Figure 5 and Figure 7The second electrical terminal 22 is shown as a telescopic probe and the first electrical terminal 12 is an integrated needle; obviously, according to actual needs, the first electrical terminal 12 can also be a telescopic probe and the second electrical terminal 22 can be an integrated needle, or the first electrical terminal 12 and the second electrical terminal 22 can be both telescopic probes, or the first electrical terminal 12 and the second electrical terminal 22 can be both integrated needles, so it is not necessary to use Figure 5 and Figure 7 The illustrations are limited. Furthermore, when the first electrical terminal 12 and the second electrical terminal 22 are telescopic, the sliding structure 211 within the rotation guide structure 112 can also slide on the rotation guide structure 112 in a direction parallel to the insertion direction, thereby satisfying the need for the locking protrusion 212 and the locking recess 114 to lock or unlock. When the first electrical terminal 12 and the second electrical terminal 22 are both integral pins, the gap between the sliding structure 211 and the rotation guide structure 112 in a direction parallel to the insertion direction is very small, thereby ensuring the reliability of the electrical contact between the first electrical terminal 12 and the second electrical terminal 22. Accordingly, the locking protrusion 212 and the locking recess 114 can be deleted.

[0048] Compared with the prior art, with the help of the contact heads 221 of some of the second electrical terminals 22, they are insulated and separated from the contact surfaces 121 of the corresponding first electrical terminals 12 when the matching sliding structure 211 slides along the plug-in guide structure 111 to the first position aligned with the rotation guide structure 112. When the matching sliding structure 211 slides along the rotation guide structure 112 to the preset second position, the contact heads 221 of all the second electrical terminals 22 are in electrical contact with the contact surfaces 121 of the corresponding first electrical terminals 12. This ensures that no power is applied before contact is in place, and power is applied after the rotation and matching are in place, thereby protecting the circuit and improving the safety and stability of the electrical connector 100 of the present invention.

[0049] It is worth noting that although Figure 4 、 Figure 12 and Figure 15It is shown that by providing an insulating layer 122 at a local position of the contact surface 121 of a first electrical terminal 12, the contact surface 121 of the first electrical terminal 12 is ensured to be insulated and separated from the contact head 221 of the corresponding second electrical terminal 22 when in the first position; obviously, according to actual needs, the contact heads 221 of one or more second electrical terminals 22 can also be insulated and separated from the contact surface 121 of the corresponding first electrical terminal 12 by staggering, that is, in the first position, the contact heads 221 of one or more second electrical terminals 22 are staggered with the contact surface 121 of the corresponding first electrical terminal 12, so that the second electrical terminal 12 The contact heads 221 of the two electrical terminals 22 are insulated and separated from the contact surface 121 of the first body 11, and the contact heads 221 of each of the remaining second electrical terminals 22 are in electrical contact with the contact surface 121 of the corresponding first electrical terminal 12; then, when the first body 11 and the second body 21 are in the second position through relative rotation, at this time, the contact heads 221 of each of the remaining second electrical terminals 22 continue to maintain electrical contact with the contact surface 121 of the corresponding first electrical terminal 12, and the contact heads 221 of the second electrical terminals 22 that were originally staggered are in electrical contact with the contact surface 121 of the corresponding first electrical terminal 12, so there is no need to Figure 4 、 Figure 12 and Figure 15 Limits shown.

[0050] It should be noted that one of the first connector 10 and the second connector 20 can be called a male connector and the other can be called a female connector. When the first electrical terminal 12 and / or the second electrical terminal 22 is selected as a non-retractable probe, that is, an integrated needle, the first electrical terminal 12 and / or the second electrical terminal 22 can be processed by turning without the need for mold opening, so the development cost is low; in addition, the shape and dimensional accuracy of the first electrical terminal 12 and / or the second electrical terminal 22 can also be controlled by the turning process to achieve diversification of product shapes. When the first electrical terminal 12 and / or the second electrical terminal 22 is selected as a retractable probe, a retractable probe with different structures can be used, such as an ordinary three-piece structure that can meet current requirements of 3A and below, or a four-piece structure that can meet current requirements of 3A to 10A; wherein, the four-piece structure can be a four-piece structure with a ball bearing or a four-piece structure with an inner needle shaft, etc. In addition, the appearance of the first pair of plugs 10 and the second pair of plugs 20, as well as the number of the first electrical terminals 12 and the second electrical terminals 22, can be designed according to the customer's equipment assembly requirements to meet customized design needs. Furthermore, the maximum outer diameter of the electrical connector 100 of the present invention after the first connector 10 and the second connector 20 are mated can be controlled within 12 mm. The number of the first electrical terminals 12 and the second electrical terminals 22 can be controlled within a range of 2 to 10 according to customer needs to meet different electrical signal transmission functions. Finally, the electrical connector 100 of the present invention can be soldered to a PCB board or soldered to an FFC flexible board to achieve electrical signal conduction and transmission.

[0051] It should be noted that the direction indicated by arrow A in the accompanying drawings is the insertion direction of the second body 21. Conversely, the insertion direction of the first body 11 is the opposite direction indicated by arrow A. Furthermore, although the insertion guide structure 111 on the first body 11 described above is an insertion guide groove, it is apparent that, depending on actual needs, the insertion guide structure 111 can also be a protrusion protruding laterally from the insertion end 11a of the first body 11. Since the matching sliding structure 211 slides along the insertion guide structure 111, when the insertion guide structure 111 is a protrusion, the matching sliding structure 211 is a slider that slides on the protrusion, and when the slider is aligned with the rotation guide groove 112, it is separated from the protrusion. In addition, the snap-fitting recess 114 on the first body 11 is only one embodiment of the snap-fitting structure provided on the groove wall of the protrusion or the rotation guide groove 112 of the first body 11. Obviously, the embodiment of the snap-fitting structure can also be the snap-fitting protrusion indicated by the number 212, and the snap-fitting protrusion on the first body 11 is raised in the direction opposite to the insertion direction of the first body 11.

[0052] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A first connector of a rotary-connection electrical connector, wherein the first connector is mated with and rotatably connected to a second connector of the rotary-connection electrical connector, the first connector comprising a first body and a plurality of first electrical terminals assembled on the first body, the first electrical terminals having contact surfaces exposed outwardly from a mating end of the first body, characterized in that: An insulating layer is provided on a portion of the contact surfaces of the first electrical terminals. When the first body and the second connector are correctly plugged into a first position, the insulating layer contacts the second electrical terminals in the second connector.

2. The first connector according to claim 1, wherein: The mating end of the first body is provided with a mating guide structure for correctly mating the first body and the second connector, and the mating guide structure is a protrusion laterally protruding on the mating end of the first body; or, the mating end of the first body is provided with a mating cavity, the contact surface of the first electrical terminal is exposed in the mating cavity, and the mating guide structure is a mating guide groove provided on the side cavity wall of the mating cavity and extending along the mating direction of the first body; the insulating layer is a PVD insulating layer.

3. The first connector according to claim 2, wherein: The side cavity wall of the inserting cavity is further provided with a rotation guide groove which is communicated with the inserting guide groove and extends along the rotation direction of the first body.

4. The first connector according to claim 3, wherein: A buckling structure is provided on the groove wall of the protrusion or the rotation guide groove, and the buckling structure on the rotation guide groove is located on a groove wall on one side of the rotation guide groove that is separated in the insertion direction of the first body and adjacent to the cavity opening of the insertion cavity.

5. The first connector according to claim 4, wherein: The buckling structure is a buckling recessed along the insertion direction of the first body; or, the buckling structure is a buckling protrusion protruding along a direction opposite to the insertion direction of the first body.

6. A rotary-connection electrical connector, comprising a first connector and a second connector that are plugged into and rotatably connected, wherein the first connector comprises a first body and a plurality of first electrical terminals assembled to the first body, the first electrical terminals having contact surfaces exposed from the plug-in end of the first body, and the second connector comprises a second body and a plurality of second electrical terminals assembled to the second body, the second electrical terminals having contact heads exposed from the plug-in end of the second body, characterized in that: When the second body and the first body are correctly inserted into the first position, the contact heads of some of the second electrical terminals are insulated and separated from the contact surfaces of the corresponding first electrical terminals. When the contact heads of all the second electrical terminals are relatively rotated between the second body and the first body to the second position, they are in electrical contact with the contact surfaces of the corresponding first electrical terminals.

7. The rotary-through electrical connector according to claim 6, wherein: An insulating layer is provided on a local position of the contact surface of a portion of the first electrical terminals, and the insulating layer is in contact with the contact head when in the first position; the insulating layer is a PVD insulating layer.

8. The rotary-through electrical connector according to claim 6, wherein: An insertion guide structure and a rotation guide structure connected to the insertion guide structure are provided on the insertion end of one of the first body and the second body, and a matching sliding structure that can slide along the insertion guide structure and the rotation guide structure is provided on the insertion end of the other of the first body and the second body. With the help of the matching sliding structure, the second body and the first body are correctly inserted into the first position by sliding along the insertion guide structure until they are aligned with the rotation guide structure. With the help of the matching sliding structure, the second body and the first body are relatively rotated to the second position.

9. The rotary-through electrical connector according to claim 8, wherein: The plug-in end of the first body is provided with an plug-in cavity, and the contact surface of the first electrical terminal is exposed in the plug-in cavity. The plug-in guide structure is a plug-in guide groove provided on the side wall of the plug-in cavity and extending along the plug-in direction of the first body. The rotation guide structure is a rotation guide groove provided on the side wall of the plug-in cavity and connected to the plug-in guide groove. The rotation guide groove extends along the rotation direction of the first body. The matching sliding structure is a protrusion laterally protruding on the plug-in end of the second body.

10. The rotary-through electrical connector according to claim 9, wherein: At least one of the first electrical terminal and the second electrical terminal is a telescopic probe that can be extended and retracted in a direction parallel to the insertion direction. A snap-fitting protrusion is provided on the groove wall and the protrusion of the rotation guide groove, and a snap-fitting recess is provided on the groove wall and the protrusion of the rotation guide groove. The snap-fitting protrusion or the snap-fitting recess on the rotation guide groove is located on the groove wall on one side of the rotation guide groove that is separated in the insertion direction of the first body and adjacent to the cavity opening of the insertion cavity. When the snap-fitting protrusion is in the second position, it is snapped together with the snap-fitting recess by means of the extension and retraction between the first electrical terminal and the second electrical terminal.

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