Electric connector

Abstract

An electrical connector (1) comprises an insulating housing (3) having a contact receiving cavity (4) extending between a mating side (13) and a wiring side (14) of the housing; the plurality of electric contact elements (2) are accommodated in the contact element accommodating cavities; the electrical contact has a plug end (12), a central body (10) and a terminal end (9) which protrudes out of the housing and beyond the wiring side (14) for connection to a conductor (22) of an electrical wire (8). The contact element accommodating cavity comprises a wiring side sleeve accommodating part (15), the diameter of the wiring side sleeve accommodating part (15) is larger than that of a part of the electric contact element, so that a tubular gap is formed between the electric contact element and the shell, the connector further comprises an insulating sleeve (5), the insulating sleeve (5) is sleeved on the electric wire in a sliding manner, and the insulating sleeve (5) is sleeved on the insulating sleeve (5). The insulating sleeve partially extends into the wiring side sleeve accommodating part (15) and partially extends out of the housing and exceeds the wiring side (15) to cover an insulating layer (23) on the conductor (22).

Description

Technical Field

[0001] The present invention relates to an electrical connector. Background Art

[0002] There are many applications that require electrical contacts with a high contact density or a compact arrangement, where the distance between the contacts depends, inter alia, on the specified voltage difference between the contacts, taking into account the safety margin required for the specified application. Electrical connectors generally have an insulating housing that has a chamber for receiving and holding the electrical contacts in isolation. Inside the housing, the contacts are separated by the insulating material of the housing. However, on the wiring side and the mating side of the connector, portions of the contacts may project out of the housing, reducing the electrical path between the electrical contacts, which may lead to electrical breakdown between the contacts outside the housing.

[0003] In a mating connector, typically the plug or pin contacts project from the mating side of the connector housing, while in the complementary connector that houses the socket, the mating side of the socket contacts is located inside the insulating housing. During mating, the pin contacts are inserted into the socket contacts and are thus separated by the insulating housing of the socket contacts, except for the interface between the housings of the mating connectors.

[0004] To increase the electrical path and thereby increase the resistance to electrical breakdown, it is known to overmold a portion of the pin contacts that are configured to be inserted into the cavity of the insulating housing of the mating connector in the inserted configuration, thereby increasing the electrical path. Since a mold is required to ensure the injection of material around the contacts, overmolding the portions of the contacts that project from the mating side of the electrical connector is an expensive and complex technique. In addition, the thickness of the insulating layer coated on the contacts is very difficult to control with high precision, and this high precision is necessary to ensure that there is a sufficient layer of insulating material to avoid electrical breakdown through the insulating material layer.

[0005] On the wiring side, it is known to fill the space between the electrical contacts with an insulating resin or potting material after the contacts are connected to the wires of the cable by various known means such as crimping, soldering, or welding. However, care needs to be taken to avoid air bubbles in the resin or potting material, as any air bubbles between the electrical contacts may cause a short circuit.

[0006] It is well known to install heat shrink tubes around the contacts to provide an insulating layer, but this method also suffers from problems of non-uniform thickness and electrical insulation performance. Moreover, since the shrinkage of the tube is somewhat uncontrolled, the longitudinal positioning of the sleeve may vary slightly. In traditional solutions, the sleeves are separately assembled onto the contacts after the contacts have been assembled in the housing, and this practice cannot provide continuous and precise axial positioning and / or thickness, thereby preventing the reduction of the connector size and the spacing between the contacts to the theoretical minimum values for the connector material, voltage, and geometry.

[0007] Therefore, especially for demanding applications that require very compact connectors as well as high reliability and high security, it is necessary to ensure that the connectors have specifications to withstand high relative voltage differences in a consistent, safe, and reliable manner. Summary of the Invention

[0008] In view of the foregoing, an object of the present invention is to provide an electrical connector that is structurally compact and can withstand high voltage differences between electrical contacts in a consistent and reliable manner.

[0009] Preferably, an electrical connector that is economical to produce and assemble is provided.

[0010] In certain applications, preferably, an electrical connector is provided that has a high contact density and can transmit high-voltage electrical signals in a safe and reliable manner.

[0011] Preferably, a high-density electrical connector with well-defined or well-controlled insertion and extraction forces is provided.

[0012] These objects of the present invention have been achieved by providing an electrical connector according to claim 1. The dependent claims set forth various preferred features of embodiments of the present invention.

[0013] An electrical connector is disclosed herein, comprising: an insulating housing having a contact receiving cavity extending between a mating side and a wiring side of the housing; a plurality of electrical contacts received in the contact receiving cavity and anchored in direct contact engagement with the contact receiving cavity; the electrical contacts including a plugging end portion, a central body portion, and a wiring end portion, the wiring end portion extending out of the housing and beyond the wiring side for connection to a conductor of a wire.

[0014] The contact receiving cavity includes a wiring side sleeve receiving portion having a diameter larger than a portion of the electrical contacts, thereby forming a tubular gap between the electrical contacts and the housing. The connector further includes an insulating sleeve slidably sleeved on the wire, the insulating sleeve partially extending into the wiring side sleeve receiving portion of the housing, and partially extending out of the housing and beyond the wiring side, covering an insulating layer on the conductor.

[0015] In a preferred embodiment, the insulating sleeve is made of polyimide.

[0016] In a preferred embodiment, the connector further includes an insulating filler deposited on the wiring side of the housing, between and around the insulating sleeves inserted into the wiring side sleeve receiving portion of the housing.

[0017] In a preferred embodiment, the connector further includes a filler limiting ring, which is mounted around the wiring side of the housing to form a receiving groove for injecting, pouring or molding the insulating filler.

[0018] In a preferred embodiment, the length of the insulating sleeve is at least eight times the distance between adjacent contacts.

[0019] In a preferred embodiment, the contact includes a mating portion extending from the mating side of the housing and a reduced-diameter central body portion having a rear shoulder. The contact further includes a second insulating sleeve having a length inserted into the reduced-diameter central body portion, and the insulating sleeve partially extends from the mating side of the housing and is configured to be inserted into the contact receiving cavity of a mating connector.

[0020] In a preferred embodiment, the diameter of the portion of the contact adjacent to the shoulder is substantially the same as the diameter of the second insulating sleeve, such that the second insulating sleeve is flush with the contact at the interface between the insulating sleeve and the shoulder.

[0021] In a preferred embodiment, the electrical contact includes a pin contact, wherein the pin contact includes a reduced-diameter central body portion having a rear shoulder and a second insulating sleeve sleeved on the reduced-diameter central body portion. A portion of the second insulating sleeve has a length extending from the mating side of the housing and is configured to be inserted into the socket contact receiving cavity of a mating connector.

[0022] In a preferred embodiment, the socket contact has a plugging end portion located in the socket contact receiving cavity of the second housing and spaced from the mating side of the second housing by a first length, and the first length is at least twice the diameter of the socket contact receiving cavity.

[0023] In an embodiment, the electrical contact includes a socket contact, wherein the socket contact includes a reduced-diameter central body portion having a rear shoulder and a second insulating sleeve sleeved on the reduced-diameter central body portion. A portion of the second insulating sleeve has a length extending from the mating side of the housing and is configured to be inserted into the pin contact receiving cavity of a mating connector.

[0024] In a preferred embodiment, the wall thickness of the insulating sleeve is less than 0.3 mm.

[0025] The present invention also discloses an electrical connector device, including a first connector and a second connector that are pluggably connected together, wherein the first connector and the second connector have the characteristics of the electrical connector according to any one or more of the foregoing embodiments, and wherein the first connector includes pin contacts and the second connector includes socket contacts.

[0026] The present invention also discloses a method of assembling an electrical connector according to any one of the foregoing embodiments, including:

[0027] - Inserting or overmolding the electrical contacts into the insulating housing;

[0028] - Sleeving the insulating sleeves on at least some of the electrical wires;

[0029] - Connecting the conductors of the electrical wires to the corresponding wire receiving portions of the contacts;

[0030] - Sliding the insulating sleeves over the corresponding wire receiving portions of the contacts and into the contact receiving cavities;

[0031] - Depositing an insulating filler on the wiring side of the housing, between and around the insulating sleeves. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Other objects and preferred features of the present invention will be apparent from the claims, the detailed description, and the drawings, wherein:

[0033] Figure 1a and Figure 1b is a perspective view of an internal portion (excluding the outer sheath) of a first (plug) connector according to an embodiment of the present invention;

[0034] Figure 1c is Figure 1a and Figure 1b a cross-sectional view of the internal portion shown;

[0035] Figure 2a is a perspective view of an electrical contact (pin contact) of the first connector;

[0036] Figure 2b is Figure 2a an exploded perspective view of the electrical contact shown, showing an insulating sleeve to be assembled to the contact;

[0037] Figure 3a and Figure 3b is a perspective view of an internal portion (excluding the outer sheath) of a second (socket) connector according to an embodiment of the present invention, for plugging into the first connector shown in Figures 1a to 1c ;

[0038] Figure 3c isFigure 3a and Figure 3b a cross-sectional view of the interior portion shown;

[0039] Figure 4a is the first connector (including Figures 1a to 1c Insulating housing and contact) and a matching second connector (comprising Figures 3a to 3b A cross-sectional view of an insulating housing and a contact member;

[0040] Figure 4b is a cross-sectional detail view of a portion of a connector according to one embodiment of the present invention, showing a wiring side of the connector;

[0041] Figure 5 is a cross-sectional view of a first connector having a pin contact and a mating second connector having a socket contact according to another embodiment of the present invention, wherein a mating portion of the pin contact is located in a contact accommodating cavity of a first insulating housing, and the socket contact extends from the second insulating housing;

[0042] Figure 6a and Figure 6b yes Figure 5 A perspective view of a connector having a socket contact in an embodiment;

[0043] Figure 7a is a perspective view of a wiring device for connecting to an electrical contact of an electrical connector according to one embodiment of the present invention;

[0044] Figure 7b yes Figure 7a A view of the wiring device shown in a first assembly step for connection to electrical contacts of a connector according to one embodiment of the present invention;

[0045] Figure 7c and Figure 7d is with Figure 7b Similar views, showing subsequent assembly steps. DETAILED DESCRIPTION

[0046] Referring to the drawings, the electrical connector 1 comprises an insulating housing 3 and a plurality of electrical contacts 2 , wherein the plurality of electrical contacts 2 are installed in corresponding contact accommodating cavities 4 formed in the housing.

[0047] The insulating housing 4 fixes the position of the electrical contacts and separates them by a certain distance required for electrical insulation. The electrical contacts can usually be fixed in the housing in a substantially fixed manner by means of barbs or protrusions with an interference fit with the housing or other well-known means. The insulating housing can also be coated on a portion of the electrical contacts. Alternatively, the electrical contacts can be inserted into a cavity of an already formed housing.

[0048] A sheath 19a, 19b can be provided around the insulating housing 3 for various functions such as guiding the connector and locking it to a mating connector, clamping a cable connected to the connector, mounting the connector, and various structural and protective functions for the connector.

[0049] The electrical contact 2 generally includes a connection end 9 for connection to an electrical conductor (such as the wire conductor 22 of the wire 8), which is provided with a well-known insulating layer 22 with its end exposed for connection to the connection end 9 of the electrical contact by crimping, soldering or fusing. The electrical contact also includes a central body portion 10 that at least partially houses and directly contacts and is anchored within the contact receiving cavity 4 of the housing, and includes a plug-in end 12 for plugging into a complementary contact.

[0050] Figure 4a A connector device is shown having a first connector 1a and a second connector 1b that can be plugged together.

[0051] The first connector 1a can include a pin contact 2a, and the second connector 1b can include a socket contact 2b. The pin contact 2a of the first connector 1a projects from the mating side 13 of the first housing 3a. However, the socket contact 2b of the second connector 1b has a plug-in end 12b located within the socket contact receiving cavity 4b, spaced a specific distance (a first length) L1 from the mating side 13b of the second housing 3b. The first length L1 is preferably at least twice the diameter of the socket contact receiving cavity 4b. Thus, when the pin contact 2a is inserted into the socket contact 2b, a specific portion of the pin contact is inserted into the socket contact receiving cavity 4b, providing insulation isolation between adjacent pin contacts.

[0052] In another embodiment as shown in Figure 5 、 Figure 6a 、 Figure 6b , the first connector 1a includes a pin contact 2a and the second connector 1b includes a socket contact 2b, where the pin contact 2a of the first connector 1a has a plug-in end 12a located within the pin contact receiving cavity 4a, and the socket contact 2b of the second connector 1b has a plug-in end 12b that projects from the mating side 13b of the second housing 3b. Thus, when the socket contact 2b is plugged onto the pin contact 2a, a specific portion of the socket contact is inserted into the pin contact receiving cavity 4a, providing insulation isolation between adjacent socket contacts.

[0053] The connection end 9 of the contact 2 projects from the housing 3 beyond the wiring side 14 of the housing 3. This enables the connector to be connected to the wire 8 after the contact 2 has been assembled to the housing 3.

[0054] See Figures 1a to 2b, the pin contact 2a further includes a mating-side insulating sleeve 5a sleeved on a part of the central body portion 10 of the pin contact 2a. The insulating sleeve 5a mounted on the pin contact 2a extends out of the mating side 13a of the first housing 3a, and its length is configured such that when the first and second connectors are mated together, it is partially inserted into the socket contact receiving cavity 4b. This ensures that the electrical path between adjacent electrical pin contacts is extended.

[0055] The pin contact 2a has a central body portion with a reduced diameter, allowing the insulating sleeve 5a to be positioned and inserted onto this reduced-diameter portion until it abuts against the shoulder 24. The sleeve 5a is preferably flush with the outer diameter of the pin contact in front of the shoulder 24.

[0056] See Figures 5 to 6b , in this variant, the socket contact 2a includes a mating-side insulating sleeve 5b sleeved on a part of the central body portion 10 of the socket contact 2b. The insulating sleeve 5b mounted on the socket contact 2b extends out of the mating side 13b of the second housing 3b, and its length is configured such that when the first and second connectors are mated together, it is partially inserted into the pin contact receiving cavity 4a. This ensures that the electrical path between adjacent electrical pin contacts is extended.

[0057] The socket contact 2b has a central body portion 10 with a reduced diameter, allowing the insulating sleeve 5b to be positioned and inserted onto this reduced-diameter portion until it abuts against the shoulder 24. The sleeve 5b is preferably flush with the outer diameter of the socket contact in front of the shoulder 24.

[0058] The insulating sleeves 5a, 5b are assembled onto the pin contact or socket contact by sliding over the central body portion (depending on the variant), advantageously ensuring the precise positioning of the sleeves 5a, 5b relative to the contact, and also ensuring a constant and precise thickness defined by the sleeve thickness. In contrast, a molded-on insulating layer may have a thickness that varies according to manufacturing tolerances.

[0059] According to one aspect of the present invention, the insulating sleeves 5a, 5b are preferably made of polyimide tubes, which advantageously provide a high insulation resistance against the electric field. In addition, the dimensions of the polyimide tubes can be very precise, especially in terms of the thickness of the tube, and can be made with a very thin wall, for example, less than 0.3 mm. This ensures that the insulating layer has a precise and constant thickness around the pin contact, thus ensuring that even if the wall of the insulating sleeve is very thin, its electrical breakdown resistance is within a small tolerance range. Other suitable insulating tube materials include polytetrafluoroethylene (PTFE), glass, or ceramic tubes, which can also be made with very thin tube walls of precise dimensions, especially tubes with a thickness less than 0.3 mm.

[0060] The length L2 of the insulating sleeves 5a, 5b defines the spanning length from the socket contact receiving cavity 4b to the pin contact receiving cavity 4a. Compared with, for example, overmolding, this length can be easily changed by the position of the shoulders on the pin contact and the lengths of the insulating sleeves 5a, 5b to adjust the electrical path according to the required specifications.

[0061] Therefore, assembling the insulating sleeves on the pin contact or the socket contact (depending on the variant) allows for greater flexibility in manufacturing connectors with different specifications. In addition, inserting the insulating sleeves 5a, 5b from the wiring end is easier and more precise in positioning the insulating sleeves onto the pin contact or the socket contact (depending on the variant) compared to inserting from the mating end. And since the insulating sleeves are locked between the contact shoulders 24 and 25 in the pin receiving cavities 4a, 4b, the positioning is secure and reliable.

[0062] Specifically referring to Figure 4a and Figure 4b , according to one aspect of the present invention, the electrical connector includes a wiring-side insulating sleeve 5 sleeved on the wiring end 9 of the electrical contact 2. The insulating sleeve 5 can preferably be made of polyimide and has the advantages described above for the insulating sleeves 5a, 5b on the contact mating side.

[0063] The contact receiving cavity 4 includes an enlarged-diameter portion at the wiring side 14, which extends into the interior of the housing with a tube insertion length L3 to form a gap between the housing and the outer surface of the socket contact wiring end 9 so that the insulating sleeve 5 can be inserted into the housing with a length L3. The insulating sleeve 5 has a length L4 that extends from inside the housing 3 to a position on the insulation layer 23 of the wire 8 such that the connection between the conductor 22 and the wiring end 9 of the electrical contact is completely covered and a longer electrical path is provided between adjacent conductors. The length L4 of the insulating sleeve is preferably at least 8 times the distance between adjacent contacts 2 to ensure a sufficiently long electrical path between the contacts.

[0064] It should be noted that in some embodiments, insulating sleeves can be provided only to a part of the plurality of electrical contacts. For example, insulating sleeves can be provided only to the contacts configured to be connected to high voltage.

[0065] Figures 7a to 7d Steps for assembling the insulating sleeve 5 onto the electrical contact 2 are shown. In this example, the wiring end 9 belongs to the pin contact 2a, but the same process also applies to the wiring end of the socket contact 2b.

[0066] Five insulating sleeves 5 are sleeved on the wire 8 and pass through the filler limiting ring 7, which is used to accommodate the insulating filler 6 as described below. The insulating sleeve 5 is sleeved on the wire 8 before connecting the wire 8 to the respective contact members 2. Figure 7b The wire receiving portion 9 where the wire 8 is connected (e.g., by soldering) to the respective contact members 2 is shown. In a subsequent step, the insulating sleeve 5 is slid along the wire towards the wiring side 14 of the housing 3 and further inserted into the respective wiring side sleeve receiving portions 15 until they abut against the shoulders 26 in the sleeve receiving portions 15.

[0067] Then the limiting ring 7 can be positioned against the wiring side 14 of the housing 3, optionally by positioning members 18, 21 on the housing 3 and the limiting ring 7. Then an epoxy resin or other insulating filler 6 material can be poured or injected into the groove area formed by the limiting ring 7, surrounding and located between the insulating sleeves 5. The insulating filler 6 is made of a resin (such as an acrylate-based or epoxy-based resin), which is configured to form an adhesion between the material of the insulating sleeve 5 and the material of the housing 3.

[0068] List of Reference Numerals

[0069] Electrical connector 1

[0070] First connector 1a, second connector 1b

[0071] Electrical contact member 2

[0072] Pin contact member 2a, socket contact member 2b

[0073] Wiring end portion 9

[0074] Central body portion 10

[0075] Sleeve receiving portion 11

[0076] Plug-in end portions 12, 12a, 12b

[0077] Shoulder 24

[0078] Housing 3

[0079] First housing 3a, second housing 3b

[0080] Mating sides 13, 13a, 13b

[0081] Wiring side 14

[0082] Contact member receiving cavity 4

[0083] Pin contact member receiving cavity 4a, socket contact member receiving cavity 4b

[0084] Wiring side sleeve receiving portion 15

[0085] Shoulder 26

[0086] Mating - side sleeve receiving portion 16

[0087] Shoulder 25

[0088] Center holding portion 17

[0089] Ring positioning member 18

[0090] Wiring - side insulating sleeve 5

[0091] Mating - side insulating sleeves 5a, 5b

[0092] Polyimide - tube insulating filler 6

[0093] Filler limiting ring 7

[0094] Positioning member 21

[0095] Wire / cable 8

[0096] Conductor 22

[0097] Insulation layer 23

[0098] Sheaths 19, 19a, 19b

[0099] Distance L1 between socket contact and mating face, Mating - side insulating sleeve length L2

[0100] Wiring - side sleeve receiving portion depth L3, Wiring - side insulating sleeve length L4

Claims

1. An electrical connector (1), comprising: an insulating housing (3) having a contact receiving cavity (4) extending between a mating side (13) and a wiring side (14) of the housing; a plurality of electrical contacts (2) received in the contact receiving cavity and anchored in direct contact engagement with the contact receiving cavity; the electrical contacts having a plugging end (12), a central body portion (10), and a wiring end (9), the wiring end (9) protruding out of the housing and beyond the wiring side (14) to connect to a conductor (22) of a wire (8), characterized in that, The contact member receiving cavity includes a wiring-side sleeve receiving portion (15), the diameter of the wiring-side sleeve receiving portion (15) being larger than a portion of the electrical contact member, thereby forming a tubular gap between the electrical contact member and the housing. The connector further includes an insulating sleeve (5), the insulating sleeve (5) being slidably sleeved on the electric wire, the insulating sleeve partially extending into the wiring-side sleeve receiving portion (15), and partially protruding from the housing and covering an insulating layer (23) on the conductor (22) beyond the wiring side (15).

2. The electrical connector according to the preceding claim, characterized in that, The insulating sleeve (5) is made of polyimide.

3. The electrical connector according to any one of the preceding claims, characterized in that, An insulating filler (6) is further included, the insulating filler (6) being deposited on the wiring side (14) of the housing (3), between and around the insulating sleeves (5) inserted into the wiring-side sleeve receiving portion (15) of the housing).

4. The electrical connector according to the preceding claim, characterized in that, A filler limiting ring (7) is further included, the filler limiting ring (7) being mounted around the wiring side (14) of the housing (3) to form a receiving groove for injecting, pouring or molding the insulating filler (6).

5. The electrical connector according to any one of the preceding claims, characterized in that, The length (L4) of the insulating sleeve is at least 8 times the distance between adjacent contact members.

6. The electrical connector according to any one of the preceding claims, characterized in that, The contact member includes a mating portion (12) protruding from the mating side (13) of the housing and a reduced-diameter body portion (10) having a rear shoulder (24). The contact member further includes a second insulating sleeve (5a, 5b), the second insulating sleeve (5a, 5b) having a length (L2) and being sleeved on the reduced-diameter central body portion. A part of the insulating sleeve protrudes from the mating side (13) of the housing and is configured to be inserted into a contact member receiving cavity (4) of a mating connector.

7. The electrical connector according to the preceding claim, characterized in that, The diameter of a portion of the contact member adjacent to the shoulder (24) is substantially the same as the diameter of the second insulating sleeve (5a, 5b), such that the second insulating sleeve is flush with the contact member at the interface between the insulating sleeve and the shoulder.

8. The electrical connector according to any one of the preceding two claims, characterized in that The electrical contact member includes a pin contact member (2a), wherein the pin contact member includes a reduced-diameter body portion (10) having a rear shoulder (24) and a second insulating sleeve (5a) sleeved on the reduced-diameter central body portion. A part of the second insulating sleeve (5a) having the length (L2) of the second insulating sleeve (5a) extends beyond the mating side (13a) of the housing and is configured to be inserted into a socket contact member receiving cavity (4b) of a mating connector (1b).

9. The electrical connector according to the preceding claim, characterized in that, The socket contact member has a plugging end portion (12b), the plugging end portion (12b) being located in a socket contact member receiving cavity (4b) of a second housing (3b) and separated from the mating side (13b) of the second housing by a first length (L1), the first length being at least twice the diameter of the socket contact member receiving cavity (4b).

10. The electrical connector according to claim 6 or 7, characterized in that, The electrical contact includes a socket contact (2b), wherein the socket contact includes a reduced-diameter body (10) having a rear shoulder (24) and a second insulating sleeve (5b) sleeved on the reduced-diameter central body, and a part of the second insulating sleeve (5b) has a length (L2) of the second insulating sleeve (5b) that extends beyond the mating side (13b) of the housing and is configured to be inserted into the pin contact receiving cavity (4a) of a mating connector (1a).

11. The electrical connector according to any one of the preceding claims, characterized in that, The wall thickness of the insulating sleeve (5, 5a, 5b) is less than 0.3 mm.

12. An electrical connector device, characterized in that, Comprising; a first connector (1a) and a second connector (1b) that are pluggably connected together, the first connector and the second connector having the characteristics of the electrical connector according to any one or more of the foregoing claims, wherein the first connector (1a) includes a pin contact (2a) and the second connector (1b) includes a socket contact (2b).

13. A method of assembling an electrical connector (1) according to any one of the preceding claims, characterized in that, Comprising; - Inserting or overmolding the electrical contact into the insulating housing (3); - Sleeving the insulating sleeve on at least some of the wires (8); - Connecting the conductor (22) of the wire (8) to the corresponding wire receiving portion of the contact; - Sliding the insulating sleeve over the corresponding wire receiving portion of the contact and into the contact receiving cavity; - Depositing an insulating filler (6) on the wiring side (14) of the housing (3), between and around the insulating sleeves (5).

14. An electrical connector (1), comprising: an insulating housing (3) having a contact receiving cavity (4) extending between a mating side (13) and a wiring side (14) of the housing; a plurality of electrical contacts (2) received in the contact receiving cavity; the electrical contacts including a plugging end portion (12), a central body portion (10) and a wiring end portion (9), the wiring end portion (9) protruding out of the housing and beyond the wiring side (14) to be connected to a conductor (22) of a wire (8), characterized in that, The contact receiving cavity includes a wiring-side sleeve receiving portion (15) having a diameter larger than a portion of the electrical contact, thereby forming a tubular gap between the electrical contact and the housing. The connector further includes an insulating sleeve (5) that slidably sleeves on the wire, and a part of the insulating sleeve extends into the wiring-side sleeve receiving portion (15), and a part extends out of the housing and covers the insulating layer (23) on the conductor (22) beyond the wiring side (15); and wherein the contact includes a mating portion (12) that extends out of the mating side (13) of the housing and a reduced-diameter body (10) having a rear shoulder (24), and the contact further includes a second insulating sleeve (5a, 5b) having a length (L2) and sleeved on the reduced-diameter central body, and a part of the insulating sleeve extends out of the mating side (13) of the housing and is configured to be inserted into the contact receiving cavity (4) of a mating connector.

15. The electrical connector according to the preceding claim, characterized in that, The insulating sleeve (5) is made of polyimide.

16. The electrical connector according to any one of claims 14 to 15, characterized in that, Further comprising an insulating filler (6) deposited on the wiring side (14) of the housing (3), between and around the insulating sleeves (5) inserted into the wiring-side sleeve receiving portion (15) of the housing.

17. The electrical connector according to the preceding claim, characterized in that, It further includes a filler limiting ring (7), and the filler limiting ring (7) is installed around the wiring side (14) of the housing (3) to form a receiving groove for injecting, pouring or molding the insulating filler (6).

18. The electrical connector according to any one of claims 14 to 17, characterized in that, The length (L4) of the insulating sleeve is at least 8 times the distance between adjacent contact members.

19. The electrical connector according to any one of claims 14 to 18, characterized in that, The diameter of the portion of the contact member adjacent to the shoulder (24) is substantially the same as the diameter of the second insulating sleeve (5a, 5b), such that the second insulating sleeve is flush with the contact member at the interface between the insulating sleeve and the shoulder.

20. The electrical connector according to any one of claims 14 to 19, characterized in that, The electrical contact member includes a pin contact member (2a), wherein the pin contact member includes a reduced-diameter body portion (10) having a rearward shoulder (24) and a second insulating sleeve (5a) sleeved on the reduced-diameter central body portion. A part of the second insulating sleeve (5a) has the length (L2) of the second insulating sleeve (5a) and extends beyond the mating side (13a) of the housing, and is configured to be inserted into the socket contact member receiving cavity (4b) of the mating connector (1b).

21. The electrical connector according to the preceding claim, characterized in that, The socket contact member has a plugging end portion (12b), and the plugging end portion (12b) is located within the socket contact member receiving cavity (4b) of the second housing (3b) and is separated from the mating side (13b) of the second housing by a first length (L1), and the first length is at least twice the diameter of the socket contact member receiving cavity (4b).

22. The electrical connector according to any one of claims 14 to 21, characterized in that, The electrical contact member includes a socket contact member (2b), wherein the socket contact member includes a reduced-diameter body portion (10) having a rearward shoulder (24) and a second insulating sleeve (5b) sleeved on the reduced-diameter central body portion. A part of the second insulating sleeve (5b) has the length (L2) of the second insulating sleeve (5b) and extends beyond the mating side (13b) of the housing, and is configured to be inserted into the pin contact member receiving cavity (4a) of the mating connector (1a).

23. The electrical connector according to any one of claims 14 to 22, characterized in that, The wall thickness of the insulating sleeve (5, 5a, 5b) is less than 0.3 mm.

24. An electrical connector device, characterized in that, Comprising: a first connector (1a) and a second connector (1b) that are detachably connected together, and the first connector and the second connector have the characteristics of the electrical connector according to any one or more of claims 14 to 23, wherein the first connector (1a) includes a pin contact member (2a), and the second connector (1b) includes a socket contact member (2b).

25. A method of assembling an electrical connector (1) according to any one of claims 14 to 24, characterized in that, Comprising: - Inserting or overmolding the electrical contact member into the insulating housing (3); - Sleeving the insulating sleeve on at least some of the wires (8); - Connecting the conductors (22) of the wires (8) to the corresponding wire receiving portions of the contact members; - Sliding the insulating sleeve over the corresponding wire receiving portions of the contact members and into the contact member receiving cavity; - Depositing an insulating filler (6) on the wiring side (14) of the housing (3), between and around the insulating sleeves (5).

Images