Connection unit and connector

Abstract

Connection unit (30), comprising: an inner conductor (31) which includes a body section (32) and a contact pin (33) which projects forward from the body section (32); and a dielectric (40) configured to hold the inner conductor (31) by accommodating the body section (32); wherein the connection unit (30) is selectively mountable into a first housing (10) comprising a reversible first locking lance (14), a front restraint device (17) capable of limiting a reversible deflection of the first locking lance (14), and a first receiving chamber (13), and a second housing (20) comprising a reversible second locking lance (22), a second receiving chamber (21), and a side restraint device (25) directed towards the second receiving chamber (21), where: a first locking section (47) and a second locking section (51) are formed on an outer surface of the dielectric (40); the connecting unit (30) is held back by the front restraint device (17), which limits the restorable deflection of the first locking lance (14), and the first locking section (47), which is locked to the first locking lance (14) when the connecting unit (30) is inserted into the first receiving chamber (13); and the connection unit (30) is retained by locking the first locking section (47) and the second locking lance (22) and by locking the second locking section (51) and the side restraint device (25) when the connection unit (30) is inserted into the second receiving chamber (21).

Description

Technical field

[0001] The present invention relates to a connection unit and a connector. State of the art

[0002] The publication JP 2012-129103 a discloses a connector with a terminal unit that receives a connection of an inner conductor in a dielectric, and a housing for receiving the terminal unit. In this type of connector, a structure for locking a retractable locking lance, which is formed in the housing, to a locking projection or extension formed on an outer surface of the dielectric, is considered as a means for retaining and holding the terminal unit, which is inserted into the housing.

[0003] Furthermore, the subsequently published document DE 11 2017 000 228 B4 discloses a connector capable of selecting either a first specification or a second specification. The first specification comprises a terminal fitting fixed to a distal end of an electrical wire having a shielding layer, a dielectric made of an insulating material that receives the terminal fitting in a restrained state, an outer conductor made of a conductive material and connected to the shielding layer while surrounding the dielectric, and a housing that receives the terminal fitting, the dielectric, and the outer conductor in a restrained state.The second specification uses at least the housing in common and does not include at least the outer conductor, wherein in the second specification a sub-housing which receives the terminal fitting in a restrained state is provided instead of the dielectric, wherein the sub-housing is formed with a locking section which is capable of being locked to a locking section which is formed in the housing and is configured to be installed or received in the housing in a restrained state. Summary of the invention: Technical problem

[0004] Since the locking lance is deflectable and capable of returning to its original position, it can be disengaged from the locking projection due to a shock, vibration, or similar event. This is intended to improve the reliability of the function for retaining the connection unit.

[0005] The present invention was developed based on the above situation and aims to improve the reliability of a function for retaining a connection unit. Solution to the problem

[0006] A first aspect of the invention relates to a connection unit comprising an inner conductor, which includes a body section and a contact pin or extension projecting forward from the body section, and a dielectric configured to hold the inner conductor by receiving the body section, wherein the connection unit is selectively mountable into a first housing comprising a restorable deflectable first locking or locking lance, a front retaining device capable of limiting a restorable deflection of the first locking lance, and a first receiving chamber, and a second housing comprising a restorable deflectable second locking lance, a second receiving chamber, and a side retaining device directed towards the second receiving chamber, wherein a first locking or locking lance isThe interlocking section and a second interlocking section are formed on an outer surface of the dielectric, the interlocking unit is held back by the front retaining device which limits the restorable deflection of the first interlocking lance, and the first interlocking section which is locked to the first interlocking lance when the interlocking unit is inserted into the first receiving chamber, and the interlocking unit is held back by interlocking the first interlocking section and the second interlocking lance and interlocking the second interlocking section and the side retaining device when the interlocking unit is inserted into the second receiving chamber.

[0007] A second aspect of the invention relates to a connector which is configured by selectively inserting a connection unit, comprising an inner conductor, a body section, and a contact pin projecting forward from the body section, and a dielectric configured to hold the inner conductor by accommodating the body section, into a first receiving chamber formed in a first housing and a second receiving chamber formed in a second housing, wherein the connector includes a releasable first locking lance formed in the first receiving chamber and a front retaining device configured to limit releasable deflection of the first locking lance when it is mounted in the first housing.a retractable, deflectable second locking lance formed in the second receiving chamber, a lateral retention device mounted in the second housing to be directed towards the interior of the second receiving chamber, a first locking section formed and configured on an outer surface of the dielectric to retain the connection unit by locking it to the first locking lance.is, when the connector unit is inserted into the first receiving chamber, and retains the connector unit by locking it to the second locking lance when the connector unit is inserted into the second receiving chamber, and includes a second locking section which is formed and configured on the outer surface of the dielectric to retain the connector unit by locking it to the side retention device when the connector unit is inserted into the second receiving chamber. Effect of the invention

[0008] When the connector unit is inserted into the first receiving chamber, the first locking section engages with the first locking lance, and the front retention device is installed in the first housing to limit the rebound deflection of the locking lance, thus reliably retaining the connector unit. When the connector unit is inserted into the second receiving chamber, the first locking section engages with the second locking lance, and the side retention device engages with the second locking section, thus reliably retaining the connector unit. The connector unit can be used as a common element for the first and second housings of different types. Brief description of the drawing Fig. Figure 1 is a perspective view showing a state where a first housing and a connection unit are separated in a first connector in one embodiment. Fig. Figure 2 is a side view in section, showing a state where a front restraint device is in a fully locked position in the first connector. Fig. Figure 3 is a side view in section, showing a state where the front restraint device is in a partially locked position in the first connector. Fig. Figure 4 is a side view in section, showing a state where a side restraint device is in a fully locked position in a second connector. Fig. Figure 5 is a side view in section, showing a state where the side restraint device is in the fully locking position and second locking sections are locked in the second connector. Fig. Figure 6 is a side view in section, showing a state where the side restraint device is in a partially locked position in the second connector. Fig. 7 is a side view in section of the connection unit, Fig. Figure 8 is a perspective view showing a state where the connection unit is mounted in a second housing in the second connector. Fig. Figure 9 is a perspective view showing a state where inner conductors and a twisted-pair cable are connected or plugged in. Fig. Figure 10 is a perspective view of a first component, Fig. Figure 11 is a perspective view of the first component in a vertically inverted state and Fig. Figure 12 is a perspective view of a second component. Embodiments of the invention

[0009] In the first and second aspects of the invention, the first locking section and the second locking section can be arranged on the same plane of the outer surface of the dielectric and at alternately different positions in a lateral direction that intersects or crosses an insertion direction into the first receiving chamber or the second receiving chamber. According to this configuration, the collision or interaction of the first locking section with the lateral restraint device and the collision of the second locking section with the first and second locking lances can be avoided, while the first and second locking sections are arranged on the same plane.

[0010] In the first and second aspects of the invention, a front stop section, or a section of a front stop configured to restrict movement of the connecting unit, which is inserted into the first receiving chamber or the second receiving chamber, beyond a corresponding insertion position, can be formed on a front side of the second locking section in the insertion direction on the outer surface of the dielectric. The first and second locking lances do not make reboundable contact at a position where the front stop section is formed, similar to the second locking section. Thus, even if the front stop section is formed on the same plane as the first locking section, no insertion resistance is generated due to the reboundable interaction with the first or second locking lance.

[0011] In the first and second aspects of the invention, the second locking section and the front stop section can be integrally formed as a single projection or extension. According to this configuration, the strength of the second locking section and the front stop section can be increased compared to when the second locking section and the front stop section project separately.

[0012] In the first and second aspects of the invention, a pair of projections or extensions can be arranged transversely across the first locking section on both sides in the lateral direction, intersecting the insertion direction into the first receiving chamber or the second receiving chamber. According to this configuration, the pair of projections sandwich-like encloses the first or second locking lance, which is locked by the first locking section, thereby preventing positional deviation of the first or second locking lance in the lateral direction. <Ausführungsform>

[0013] A specific embodiment of the present invention is described below with reference to Fig. 1 to 12 are described. It should be noted that in the following description, a left-hand side is described in Fig. 1 to 12 are defined as a front or front side, relating to a forward-backward direction. Top and bottom sides, which are in Fig. Figures 1 to 10 and 12 are shown and are defined directly as the upper and lower sides with respect to a vertical direction.

[0014] A connection unit 30 of this embodiment represents a first connector A (connector as claimed) of a waterproof type by being or being mounted in a first housing 10, and represents a second connector B (connector as claimed) of a non-waterproof type by being or being mounted in a second housing 20.

[0015] The first housing 10 is made of a synthetic or artificial resin and is, as is shown in Fig. 2 and Fig. Figure 3 shows a single component comprising a receiving section 11 and a receptacle 12, which projects forward from the outer circumference of the front end of the receiving section 11. A first receiving chamber 13 is formed inside the receiving section 11. The connecting unit 30 is inserted into the receiving chamber 13 from behind the first housing 10. A first locking lance 14, which projects forward and is deflectable upwards in a return-to-center position, is formed on an inner upper surface of the first receiving chamber 13. Stepped first stops 15 are formed on the inner upper surface of the first receiving chamber 13.

[0016] The receiving section 11 is designed with a deflection chamber 16 to allow the first locking lance 14 to be deflected upwards in a restorable or elastic manner. A front restraint device 17 is mounted in the receiving section 11 from the front of the first housing 10. The front restraint device 17, which is mounted or arranged in the receiving section 11, is positioned in the forward-backward direction between a partially locked position, where the front restraint device 17 is retracted forwards from the deflection chamber 16 to allow the restorable deflection of the first locking lance 14, as shown in Fig. 3 is shown, and movable to a fully locking position where the front restraint device 17 enters the deflection space 16 to limit the restorable deflection of the first locking lance 14, as shown in Fig. Figure 2 shows that the deflection space 16 is not open in the outer circumferential surface of the receiving section 11 and is open in the front end surface of the receiving section 11.

[0017] The second housing 20 is made of a synthetic or artificial resin. As this is shown in Fig. As shown in Figures 4 to 6, a second receiving chamber 21 is formed inside the second housing 20. The connection unit 30 is inserted into the second receiving chamber 21 from behind the second housing 20. A second locking or locking lance 22, which projects forward and can be deflected upwards in a return-to-center position, is formed on an inner upper surface of the second receiving chamber 21. Stepped second stops 23 are formed on the inner upper surface of the second receiving chamber 21.

[0018] The second housing 20 is provided with a mounting hole 24, which communicates with the interior of the second receiving chamber 21 through its upper surface (outer surface). The mounting hole 24 is located behind the second locking lance 22. A side retention device 25 is mounted in the mounting hole 24. The side retention device 25, which is mounted in the mounting hole 24, is positioned in the vertical direction (direction that intersects an insertion / removal direction of the connection unit 30 into and out of the second receiving chamber 21) between a partially locking position, where the side retention device 25 is retracted to the outside of the second receiving chamber 21, as shown in Fig. 6 is shown, and movable to a fully locking position where the side restraint device 25 is arranged in the receiving chamber 21, as shown in Fig. 4 and Fig. 5 is shown.

[0019] The connection unit 30 is a connecting element that constitutes a wiring harness for an Ethernet (registered trademark) high-speed communication circuit of a motor vehicle and is configured by enclosing a pair of inner conductors 31 in a dielectric 40. The inner conductor 31 is shaped to be long in the forward-backward direction. The inner conductor 31 includes a body section 32 in the form of a rectangular tube, an elongated contact pin or extension 33 projecting forward from the body section 32, and a crimping section 34 in the form of an open drum, which is connected to the rear end of the body section 32. A front end of a wire 35 is conductively fixed to the crimping section 34.A pair of wires 35, which are connected to two inner conductors 31, constitutes a twisted-pair cable 36.

[0020] The dielectric 40 is configured by combining a first component 41, made of a synthetic resin and having a halved shape, with a second component 52, also made of a synthetic resin and having a halved shape, in the vertical direction (direction that intersects the axes of the front end parts of the wires 35). The first component 41 is made of polybutylene terephthalate (PBT) and includes an upper wall section 42, which is elongated in the forward-backward direction, a pair of left and right side wall sections 43, which extend downwards from both left and right side edges of the upper wall section 42, and a partition section 44, which extends downwards from a central part of the upper wall section 42 in the forward-backward direction.Regions or areas between the pair of side wall sections 43 and the partition section 44 serve as a pair of left and right groove sections 45, which are elongated in the forward-backward direction. A pair of left and right locking grooves or slots 46, which are elongated in the forward-backward direction, are formed in the outer side surfaces of the pair of left and right partition sections 44.

[0021] A projecting first locking section 47 is integrally formed, i.e., integrally, on a front end portion of the upper surface (outer surface) of the upper wall section 42. The first locking section 47 is located in a laterally central part of the upper wall section 42. A front end portion of the first locking section 47 has an inclined surface 48, which is inclined relative to the forward-backward direction (insertion direction of the connection unit 30 into the first housing 10 and the second housing 20). A rear end surface of the first locking section 47 serves as a locking surface, essentially at a right angle to the forward-backward direction.

[0022] A pair of left and right projections or extensions 49 in the form of ribs, extending in the forward-backward direction, are formed on the upper surface of the upper wall section 42. The projections 49 are located in regions or areas on both left and right lateral margins or edges of the upper wall section 42 and outside both left and right outer lateral surfaces of the first locking section 47 in a lateral direction. The front ends of the pair of left and right projections 49 are located in essentially the same position as the rear end of the first locking section 47 in the forward-backward direction. Thus, the entirety of the projections 49 is located behind the first locking section 47.The front end sections of the pair of left and right projections 49 serve as front stop sections 50, which have front stop surfaces facing west at a right angle to the forward-backward direction. The rear end sections of the pair of left and right projections 49 serve as second locking sections 51, which have locking surfaces substantially at a right angle to the forward-backward direction.

[0023] The second component 52 is made of polybutylene terephthalate (PBT) and comprises a bottom wall section 53, which is elongated in the forward-backward direction, and a pair of left and right outer wall sections 54, which extend upwards from both left and right lateral edges of the bottom wall section 53. Locking ribs 55 are formed on the inner surfaces of the extending ends of the two left and right outer wall sections 54.

[0024] When the first component 41 and the second component 52 are assembled, the body sections 32 and the crimping sections 34 of the pair of inner conductors 31 are received into the two left and right groove sections 45 of the first component 41. Since the first component 41 and the second component 52 are divided and joined in the vertical direction, which essentially intersects the front end sections of the wires 35 at a right angle, one direction of movement of the inner conductors 31 when they are mounted in the first component 41 is also a direction that essentially intersects the axes of the front end sections of the wires 35 at a right angle. In this way, the untwisted length of the wires 35 can be suppressed or limited to the shortest possible length in the front end sections of the two wires 35 that constitute the twisted-pair cable 36.form, which is why a reduction of a noise-reducing function, which is caused by untwisting the wires 35, can be avoided.

[0025] After the pair of inner conductors 31 is mounted into the first component 41, the second component 52 is assembled to be joined to the first component 41 from below. The joined first component 41 and second component 52 are held together by the locking grooves 46 and the locking ribs 55. One assembly direction of the second component 52 with the first component 41 is one that intersects the axes of the front end portions of the wires 35 at a substantially right angle. Once the first component 41 and the second component 52 are joined, the dielectric 40 is configured, and the pair of inner conductors 31 is mounted in the dielectric 40, thus completing the assembly of the terminal unit 30.

[0026] When mounting the connector 30 into the first housing 10, a rubber stopper 18 is pre-mounted on the outer circumference of the twisted-pair cable 36, and the connector 30 is inserted into the first receiving chamber 13 from behind the first housing 10, with the front retaining device 17 being held in the partially locked position. During the insertion process of the connector 30, the inclined surface 48 of the first locking section 47 deflects the first locking lance 14 in a rebounding manner.

[0027] When the connection unit 30 is properly inserted, the front stop sections 50 abut against the first stops 15 to stop the connection unit 30 at the front, and the first locking section 47 is locked to the first locking lance 14 to retain the connection unit 30 relative to the first housing 10. Furthermore, an opening at the rear end of the first receiving chamber 13 is sealed in a liquid-tight manner by the rubber stopper 18. In this way, the connection unit 30 is primarily locked.

[0028] Once the connector 30 is properly inserted, the front restraint device 17 is pushed or pressed from the partially locked position to the fully locked position to enter the deflection chamber 16. This limits the restorable deflection of the first locking lance 14 in a direction separating it from the first locking section 47, thus secondarily locking the connector 30. As just described, the connector 30 is reliably restrained by primary locking by the first locking lance 14 and secondary locking by the front restraint device 17.

[0029] When mounting the connector 30 into the second housing 20, the connector 30 is inserted into the second receiving chamber 21, with the side retaining device 25 held in the partially locked position. During the insertion process, the inclined surface 48 of the first locking section 47 deflects the second locking lance 22 in a rebounding manner. When the connector 30 is properly inserted, the front stop sections 50 abut the second stops 23 to stop the connector 30 at the front, and the first locking section 47 engages the second locking lance 22 to retain the connector 30 relative to the second housing 20. In this way, the connector 30 is primarily locked.

[0030] Once the connector 30 is properly inserted, the side restraint device 25 is pushed or pressed from its partially locked position to its fully locked position to enter the second receiving chamber 21. In this way, the side restraint device 25 is locked from the rear by the second locking sections 51, thus secondarily locking the connector 30. As just described, the connector 30 is reliably restrained by primary locking by the second locking lance 22 and secondary locking by the side restraint device 25.

[0031] The first connector A of this embodiment is configured or assembled by inserting the connection unit 30 into the first receiving chamber 13, which is formed in the first housing 10. Furthermore, the second connector B is configured by inserting the connection unit 30 into the second receiving chamber 21, which is formed in the second housing 20.

[0032] The terminal unit 30 includes the inner conductors 31, which have the contact pins or prongs 33 projecting forward from the body sections 32, and the dielectric 40, which is configured to hold the inner conductors 31 while the body sections 32 are accommodated. It is selectively mounted in the first housing 10 and the second housing 20. In other words, the terminal unit 30 can be mounted in either the first housing 10 or the second housing 20, and is mounted in one of the first housing 10 and the second housing 20 according to the requirements.

[0033] The first housing 10 includes the reversible first locking lance 14, the front restraint device 17, which is capable of limiting the reversible deflection of the first locking lance 14, and the first receiving chamber 13. The second housing 20 includes the reversible second locking lance 22, the second receiving chamber 21, and the side restraint device 25, which is directed towards the second receiving chamber 21.

[0034] The first locking section 47 and the second locking section 51 are formed on the outer surface of the dielectric 40. When the connection unit 30 is inserted into the first receiving chamber 13, the first locking section 45 is locked to the first locking lance 14, and the front restraint device 17 limits the restorable deflection of the first locking lance 14. In this way, the connection unit 30 is reliably restrained. Furthermore, when the connection unit 30 is inserted into the second receiving chamber 21, the connection unit 30 is reliably restrained by the locking of the first locking section 47 and the second locking lance 22, and by the locking of the second locking section 51 and the side restraint device 25.

[0035] As just described, the reliability of the function for retaining the connection unit 30 is excellent regardless of whether the connection unit 30 is mounted in the first housing 10 or the second housing 20. Furthermore, the connection unit 30 can be used as a common element for the waterproof first housing 10 and the non-waterproof second housing 20, which are of different types.

[0036] Furthermore, the first locking section 47 and the second locking sections 51 are arranged on the same plane (outer surface of the upper wall section 42) of the outer surface of the dielectric 40 and at alternately different positions in a lateral direction that intersects the insertion direction into the first or second receiving chamber 13 or 21. According to this configuration, the collision of the first locking section 47 with the lateral restraint device 25 can be avoided, and the collision of the second locking sections 51 with the first and second locking lances 14, 22 can be avoided, while the first and second locking sections 47, 51 are arranged on the same plane (outer surface of the upper wall section 42).

[0037] Furthermore, the front stop sections 50, which are configured to restrict movement of the connection unit 30, which is inserted into the first or second receiving chamber 13 or 21, beyond a proper or corresponding insertion position, are formed on the front sides of the second locking sections 51 in the insertion direction on the outer surface of the dielectric 40. The first and second locking lances 14, 22 come into non-returnable contact at a position where the front stop sections 50 are formed, similar to the second locking sections 51.In this way, even if the front stop sections 50 are formed on the same plane (outer surface of the upper wall section 42) as the first locking section 47, no insertion resistance is created or generated due to the restorable meeting of the front stop sections 50 with the first or second locking lance 14 or 22.

[0038] Furthermore, the second locking section 51 and the front stop section 50 are integrally formed as a single piece within the projection 49. According to this configuration, the strength of the second locking section 51 and the front stop section 50 can be increased compared to cases where the second locking section 51 and the front stop section 50 project separately.

[0039] Furthermore, the pair of left and right projections 49 are arranged transversely on both sides across the first locking section 47 in the lateral direction, intersecting the insertion direction into the first or second receiving chamber 13 or 21. According to this configuration, the pair of projections 49 are arranged to sandwich-like enclose the first or second locking lance 14 or 22, which is locked by the first locking section 47, thereby preventing any positional deviation of the first or second locking lance 14 or 22 in the lateral direction. <Andere Ausführungsformen>

[0040] The present invention is not limited to the embodiment described and illustrated above. For example, the following embodiments are also included within the technical scope of the present invention. (1) Although the first and second locking sections are arranged on the same plane of the outer surface of the dielectric in the embodiment above, the first and second locking sections may be arranged in regions on opposite sides of the outer surface of the dielectric. (2) Although the front stop sections are arranged on the same plane as the first and second locking sections in the embodiment above, the front stop section(s) may be arranged in a planar region different from that for the first and second locking sections. (3) Although the second locking section and the front stop section are integrally formed or integrally formed in the single projection in the above embodiment, the second locking section and the front stop section may be in the form of independent projections. (4) Although the pair of projections is arranged to sandwich the first or second locking lance in the width direction in the embodiment above, one projection may be arranged to extend along only one side surface of the first or second locking lance. (5) Although only one first locking section is provided in the above embodiment, two or more first locking sections may be provided. (6) Although one pair of the second locking sections is formed in the above embodiment, one, three or more second locking section(s) may be provided. (7) Although one pair of front stop sections is formed in the above embodiment, one, three or more second front stop section(s) may be provided. (8) Although two inner conductors are mounted in a dielectric in the above embodiment, one, three or more inner conductors may be included in a dielectric. (9) Although the dielectric consists of two components, i.e. the first and second components in the embodiment above, the dielectric may consist of a single component. (10) Although two wires connected to the pair of inner conductors constitute the twisted-pair cable in the above embodiment, the present invention can also be applied when a wire connected to an inner conductor does not constitute or form a twisted-pair cable. (11) Although the first component is made of polybutylene terephthalate (PBT) in the embodiment above, the first component may be made of a material other than polybutylene terephthalate. (12) Although the second component is made of polybutylene terephthalate (PBT) in the embodiment above, the second component may be made of a material other than polybutylene terephthalate. (13) Although both the first component and the second component are made of polybutylene terephthalate (PBT) in the embodiment above, a material combination of the first component and the second component may be polyethylene terephthalate (PET) and polypropylene (PP), polybutylene terephthalate and polyethylene (PE), or polybutylene terephthalate and foamed polybutylene terephthalate. List of reference symbols A first connector (connector) B second connector (connector) 10 first case 13 first admission chamber 14 first locking or locking lance 17 front restraint system 20 second case 21 second admission chamber 22 second locking or locking lance 25 Side restraint system 30 connection unit 31 inner conductor 32 Body section 33 Contact pin or mandrel 40 Dielectric 47 first locking or locking section 49 Protrusion or extension 50 front stop section 51 second locking or locking section

Claims

[1] Connection unit (30), comprising: an inner conductor (31) which includes a body section (32) and a contact pin (33) which projects forward from the body section (32); and a dielectric (40) configured to hold the inner conductor (31) by accommodating the body section (32); wherein the connection unit (30) is selectively mountable into a first housing (10) comprising a reversible first locking lance (14), a front restraint device (17) capable of limiting a reversible deflection of the first locking lance (14), and a first receiving chamber (13), and a second housing (20) comprising a reversible second locking lance (22), a second receiving chamber (21), and a side restraint device (25) directed towards the second receiving chamber (21), where: a first locking section (47) and a second locking section (51) are formed on an outer surface of the dielectric (40); the connecting unit (30) is held back by the front restraint device (17), which limits the restorable deflection of the first locking lance (14), and the first locking section (47), which is locked to the first locking lance (14) when the connecting unit (30) is inserted into the first receiving chamber (13); and the connection unit (30) is retained by locking the first locking section (47) and the second locking lance (22) and by locking the second locking section (51) and the side restraint device (25) when the connection unit (30) is inserted into the second receiving chamber (21). [2] Connection unit (30) according to claim 1, wherein the first locking section (47) and the second locking section (51) are arranged on the same plane of the outer surface of the dielectric (40) and at alternately different positions in a lateral direction which intersects or crosses an insertion direction into the first receiving chamber (13) or the second receiving chamber (21). [3] Connection unit (30) according to claim 2, wherein a front stop section (50) configured to restrict movement of the connection unit (30) inserted into the first receiving chamber (13) or the second receiving chamber (21) beyond a proper insertion position is formed on a front side of the second locking section (51) in the insertion direction on the outer surface of the dielectric (40). [4] Connection unit (30) according to claim 3, wherein the second locking section (51) and the front stop section (50) are integrally formed in a single projection. [5] Connection unit (30) according to claim 4, wherein a pair of projections is arranged on both sides transversely across the first locking section (47) in the width direction, which intersects or crosses the insertion direction into the first receiving chamber (13) or the second receiving chamber (21). [6] Connector (A, B) comprising by selectively inserting a connection unit (30) comprising an inner conductor (31) having a body section (32) and a contact pin (33) projecting from the body section (32) and a dielectric (40) configured to hold the inner conductor (31) by receiving the body section (32) into a first receiving chamber (13) formed in a first housing (10) and a second receiving chamber (21) formed in a second housing (20), comprising: a retractable deflectable first locking lance (14) which is formed in the first receiving chamber (13); a front restraint device (17) configured to limit a restorable deflection of the first locking lance (14) by being mounted in the first housing (10); a retractable deflectable second locking lance (22) which is formed in the second receiving chamber (21); a side restraint device (25) which is mounted in the second housing (20) to be directed towards the interior of the second receiving chamber (21); a first locking section (47) formed and configured on an outer surface of the dielectric (40) to retain the connection unit (30) by locking it against the first locking lance (14) when the connection unit (30) is inserted into the first receiving chamber (13), and to retain the connection unit (30) by locking it against the second locking lance (22) when the connection unit (30) is inserted into the second receiving chamber (21); and a second locking section (51) which is formed and configured on the outer surface of the dielectric (40) to retain the connection unit (30) by locking it to the side retention device (25) when the connection unit (30) is inserted into the second receiving chamber (21).

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