JP5501140B2 - Shield connector - Google Patents

Description

  The present invention relates to a shield connector having a structure in which a terminal of a shielded wire terminal is accommodated in an inner housing, a braided shield wire is connected to a shield shell, and the shield shell is covered with an outer housing.

  Conventionally, various structures have been proposed as shielded connectors that are directly attached to automobile equipment. For example, in Patent Document 1, a rear portion of a housing made of insulating resin is inserted into a hole portion of a thick shield shell made of aluminum, and the housing is fixed by press-fitting the convex portion of the housing into the concave portion of the shield shell. Insert the electric wire with terminal from the shell into the housing, project the terminal for connecting the device forward from the housing, insert the housing into the hole of the device, and close the seal ring on the outer periphery of the housing to the inner peripheral surface of the hole It is described that the flange portion of the shield shell is tightened and connected to the device with a bolt.

  A metallic thin-walled cylindrical shield member is extrapolated to the rear part of the shield shell, and the shield member is connected and fixed to the shield shell by caulking. The electric wire led out from the rear part of the housing is led out through the shield member. The electric wire is an unshielded electric wire.

JP 2002-373737 A (FIGS. 1 to 3 and FIG. 7)

  However, in the conventional shield connector, there is a concern that, when water is applied to the connection portion between the shield member and the shield shell by caulking, the connection portion may be corroded and the shield performance may be deteriorated. . In addition, there is a concern that the fixing force between the housing and the shield shell may decrease or press fit may occur when there is a large dimensional variation between the convex portion of the housing and the concave portion of the shield shell. There is a concern that it is difficult to visually check the engagement state from the outside.

  In view of the above points, the present invention provides a shield connector for connecting a braided portion of a shielded electric wire to a thin shield shell using a shielded electric wire, and can reliably waterproof the connecting portion between the shield shell and the braided, In addition, an object of the present invention is to provide a shield connector having a structure capable of surely fixing an insulating housing into which a terminal of a terminal of a shielded wire is inserted and a shield shell.

  In order to achieve the above object, a shielded connector according to claim 1 of the present invention is such that a terminal of a shielded electric wire with a terminal is accommodated forward in an insulating inner housing, and a conductive material is provided outside the inner housing. A shield shell is disposed, the shield shell and the braid of the shielded electric wire are connected to form a braided connection portion, and an insulating outer housing is disposed outside the shield shell; the inner housing and the shield shell; A first packing on the front side is disposed between the shield shell and the outer housing, and a second packing on the front side is disposed between the shield shell and the outer housing, and the rear packing is disposed between the shield wire and the outer housing. A third packing is closely arranged, and the braided connection is waterproof between the first and second packings and the third packing. .

  With the above configuration, the first packing prevents water from entering between the inner housing and the shield shell from the front side of the inner housing, and attempts to enter between the outer housing and the shield shell from the front side of the outer housing. Water is blocked by the second packing, and water that tries to enter the outer housing along the shielded wires from the rear side of the outer housing is blocked by the third packing. The braided connecting portion disposed between the packing and the rear third packing is reliably waterproofed without entering water in the outer housing.

  The shield connector according to claim 2 is the shield connector according to claim 1, wherein a locking piece projects from the rear portion of the inner housing, and a claw portion of the locking piece is passed through the rear wall of the shield shell. A hole portion to be joined is provided, the claw portion is visibly exposed before the outer housing is mounted, and the claw portion is covered and protected after the outer housing is mounted.

  With the above configuration, the claw portion of the locking piece of the inner housing protrudes (projects) outward from the shield shell in the state of the sub-assembly of the shielded electric wire with terminal, the inner housing, the shield shell, and each packing. The operator can easily and reliably visually check whether or not the portion is securely engaged with the hole of the shield shell. In the state of the shield connector with the outer housing attached to the sub-assembly, the claw part is covered with the outer housing, so that interference between the claw part and the outside is prevented, and the claw part is unexpectedly detached from the hole part. Is prevented.

  The shield connector according to claim 3 is the shield connector according to claim 1 or 2, wherein the first packing protrudes forward of the shield shell, and a protruding portion of the packing is in close contact with the inner surface of the mating connector. It is characterized by that.

  With the above configuration, the first packing performs both waterproofing between the inner housing and the shield shell and waterproofing between the inner housing and the mating connector, thereby simplifying the seal structure. Examples of the counterpart connection body include a device and a counterpart shield connector.

  A shield connector according to a fourth aspect is the shield connector according to any one of the first to third aspects, wherein the shield shell and the outer housing are overlapped with each other in a state where the shield shell and the outer housing are overlapped with each other. It is fixed.

  With the above configuration, the shield shell and the outer are fixed to each other between the flange portions, and the flange portion of the shield shell is grounded to the mating connector. Examples of the counterpart connection body include a device and a counterpart shield connector.

  According to the first aspect of the present invention, in the shield connector for connecting the braid of the shielded electric wire to the shield shell, the connection portion between the shield shell and the braid can be reliably waterproofed, thereby oxidizing the braid connection portion and the like. And shielding performance can be maintained well over a long period of time.

  According to the second aspect of the present invention, the state of engagement between the claw portion of the locking piece of the inner housing and the hole portion of the shield shell is visually confirmed before mounting the outer housing, thereby It can be securely fixed, and the outer housing is attached to cover the claw and protect it safely from interference with the outside. The fixing reliability can be increased.

  According to the invention described in claim 3, the first packing also serves as waterproofing between the inner housing and the mating connector, so that the number of parts and cost of the packing can be reduced, and the sealing structure can be reduced. It can be simplified.

  According to invention of Claim 4, fixation with a shield shell and an outer housing and earthing connection with a shield shell and the other party connection body can be made firmly by screwing.

It is a longitudinal section showing one embodiment of a shield connector concerning the present invention. It is a disassembled perspective view which shows the inner housing and shield shell of a shield connector. It is a back view disassembled perspective view which similarly shows an inner housing and a shield shell. It is a disassembled perspective view which shows a shield shell and an outer housing. It is a longitudinal cross-sectional view which shows the subassembly of a shield connector. It is sectional drawing which shows the braided connection part of a shield wire. It is a top view which decomposes | disassembles and shows each component of a shield connector. It is the longitudinal cross-sectional view which similarly decomposes | disassembles and shows each component.

  1 to 8 show an embodiment of a shield connector according to the present invention.

  As shown in FIG. 1, the shield connector 1 includes an inner housing 2 made of insulating resin, a first packing 3 made of synthetic rubber attached to a front portion of the inner housing 2, and terminals inserted into the inner housing 2. A shielded electric wire 4 attached to the outer side of the inner housing 2 and locked by a flexible locking piece 5 of the inner housing 2 and connected to the braid 4a of the shielded electric wire 4 Shell 6, outer housing 7 made of insulating resin attached to the outside of shield shell 6, and second and third packings 8, 9 made of synthetic rubber respectively attached to the front and rear portions of outer housing 7. Are provided.

  The inner housing 2 has one terminal accommodating chamber 10 on the inner side and a large-diameter empty chamber 11 at the rear thereof, and has a slit-like terminal insertion hole 13 on the front wall 12. The latter half of the male terminal 14 connected to the core wire 4 b of the front end of the shielded wire 4 is accommodated in the terminal accommodating chamber 10, and the plate-like electrical contact portion 14 b of the first half of the male terminal 14 is the terminal insertion hole 13. Protrudes forward. An insulating outer skin portion 4 d that follows the core wire 4 b of the shielded electric wire 4 is located in the rear empty space 11. In the specification, directions such as front and rear are for convenience of explanation, and do not always coincide with the direction in which the shield connector 1 is attached to the device (partner connection body) 15 indicated by a chain line.

  As shown in FIGS. 2 and 3, the inner housing 2 has a circumferential wall 16 having a circular cross section. The inner housing 2 has an annular flange 17 at the front end of the circumferential wall 16 and a longitudinal intermediate portion (front half rear portion). 1, the wide packing 3 shown in FIG. 1 is mounted, and the inner lip 3a of the packing 3 is in close contact with the outer surface of the peripheral wall 16.

  As shown in FIG. 1, the front half 3b of the packing 3 together with the front 2a of the inner housing 2 protrudes (exposes) forward from the front end of the outer housing 7, and is packed on the inner peripheral surface of the circular hole 15a of the device 15. The lip 3c on the outer periphery of the first half 3 (projecting portion) 3b is in close contact. The outer peripheral lip 3 d of the latter half of the packing 3 is in close contact with the inner peripheral surface of the front portion of the shield shell 6. The seal between the inner housing 2 and the shield shell 6 and the seal between the inner housing 2 and the device 15 are performed with a single packing 3, thereby reducing the number of packings and the cost and simplifying the structure. To do.

  As shown in FIG. 2, the terminal insertion hole 13 of the front wall 12 of the inner housing 2 is reinforced and extended by a frame-shaped guide wall 18. As shown in FIGS. 2 and 3, a pair of upper and lower locking pieces 5 are horizontally extended integrally from the middle flange portion 17 of the inner housing 2, and each locking piece 5 is formed at a rear notch 19 of the peripheral wall 16. It has a claw portion 5a facing outward at the free end (tip) of a locking piece body (substitute with reference numeral 5) that is elastically deflectable in the thickness direction and protrudes rearward from the rear end of the peripheral wall 16. The part 5a has an inclined surface (substitute with reference numeral 5a) and a vertical locking surface 5b. The inner surface 5 c of the locking piece 5 is positioned substantially flush with the outer peripheral surface of the peripheral wall 16, and the outer surface 5 d of the locking piece 5 is positioned radially outward from the outer peripheral surface of the peripheral wall 16. In FIG. 1, the outer surface 5 d of the locking piece 5 and the outer surface of the peripheral wall 16 are shown as the same surface (this configuration may also be used).

  As shown in FIGS. 2 and 3, the shield shell 6 is provided to be orthogonal to the circular cylindrical peripheral wall 20, the outward flange 21 formed at the front end of the peripheral wall 20, and the rear end of the peripheral wall 20. A wall 22 and a small-diameter and short annular wall 24 extending around the hole 23 at the center of the rear wall 22 are provided. The flange portion 21 is composed of a portion 21a that largely protrudes in a substantially triangular shape, and an annular portion 21b that extends along the front end of the peripheral wall 20, and has a fixing hole 25 and a pair of left and right engaging portions 26 on the protruding portion 21a. ing. The hole 25 is fastened and fixed together with the flange portion 28 of the outer housing 7 to the wall portion of the device 15 (represented by reference numeral 15) with the bolt 27 of FIG.

  As shown in FIG. 4, each locking portion 26 has an inclined elastic locking piece 26 b inside the frame portion 26 a, and a protrusion (covered) in the notch 29 of the flange portion 28 at the front end of the outer housing 7. The free end of the locking piece 26b is engaged with the locking portion) 29a. A pair of upper and lower rectangular holes 30 are provided in the rear wall 22 of the shield shell 6 in FIG. 3, and the pawls of the locking pieces (locking portions) 5 of the inner housing 2 are formed in the holes (locked portions) 30. The portion 5a is inserted and locked. The annular wall 24 and the peripheral wall 20 of the shield shell 6 are located concentrically.

  As shown in FIG. 4, the outer housing 7 includes a peripheral wall 31 that is slightly tapered (gradually reduced in diameter toward the rear end), a flange portion 28 provided at the front end of the peripheral wall 31, and a step on the rear end side of the peripheral wall 31. The flange portion 28 includes a concentric annular portion 32 whose diameter is reduced via a portion 32a. The flange portion 28 has a fixing hole 33, and a ring shape is formed inside the flange portion 28 and inside the front end of the peripheral wall 31 as shown in FIG. The groove portion 34 for receiving the packing 8 is opened, the front end of the groove portion 34 is opened to the outside (the front end of the groove portion 34 is closed by the flange portion 21 of the shield shell 6), and is formed on the inner peripheral surface of the annular portion 32. The lip 9a on the outer periphery of the packing 9 extrapolated to the shield wire 4 is in close contact.

  As shown in FIG. 5 (in which the packings 3, 8, 9, the electric wires 4, etc. in FIG. 1 are omitted), the inner housing 2 is inserted and accommodated in the inner space 35 of the shield shell 6 from the front opening 35 a, The claw portion 5a of the stopper piece 5 penetrates and engages with the hole 30 of the rear wall (bottom portion) 22 of the shield shell 6 and protrudes to the outside of the rear wall 22. The front portion 2a of the inner housing 2 is forward of the front opening 35a. The flange portion 21 at the front end of the shield shell 6 protrudes radially outward from the front opening 35 a, and the locking portion 26 is located on the root side of the flange portion 21.

  When the claw portion 5a of the locking piece 5 is bent inward while the sloping surface (substitute with reference numeral 5a) is brought into sliding contact with the inner surface of the hole portion 30 and the claw portion 5a passes through the hole portion 5. Thus, the locking piece 5 is elastically restored outward and the locking surface 5b of the claw portion 5a comes into contact with the outer surface of the rear wall 22 so that the inner housing 2 is prevented from being pulled forward. At the same time, the thin rear end surface 16a of the peripheral wall 16 of the inner housing 2 comes into contact with the inner surface of the rear wall 22 of the shield shell 6 to prevent the inner housing 2 from moving backward.

  In the state of the sub-assembly 1 ′ without the outer housing 7 (FIG. 1) in FIG. 5, the claw portion 5a of the locking piece 5 protrudes to the outside, so that the operator visually checks the locking state of the locking piece 5. Thus, incomplete locking, that is, incomplete fixing between the shield shell 6 and the inner housing 2 can be reliably prevented, and the fixing reliability can be improved.

  When the shield shell 6 of the subassembly 1 ′ of FIG. 5 is inserted into the outer housing 7 of FIG. 1 from the front, the rear end 20 a of the peripheral wall 20 of the shield shell 6 is a taper with the outer housing 7 being gradually reduced in diameter. 4 is engaged with the latched portion 29 of the outer housing 7 so that the shield shell 6 is supported at two points on the front and rear sides of the outer shell 31 while being in sliding contact with the inner surface 31a. 7 is supported and fixed stably without rattling.

  In the state of the shield connector 1 of FIG. 1, the claw portion 5a of the locking piece 5 is covered with the outer housing 7 and is safely protected without interference with the outside. As a result, unintentional disengagement due to interference between the claw portion 5a and the outside, that is, separation of the inner housing 2 from the shield shell 6 is reliably prevented.

  As shown in FIG. 6, the shielded electric wire 4 includes a core wire portion 4b with the front end side exposed in FIG. 1, an insulating endothelium 4c covering the core wire portion 4b, a conductive metal braid 4a covering the insulating endothelium 4c, and a braid 4a. It is composed of an insulating outer covering 4d that covers the leading end of the braid 4a together with the core wire portion 4b, the exposed braid 4a is folded back, and an annular conductive metal ring is formed between the braided folded section 4a and the insulating outer covering 4d. The shield sleeve 36 is fitted, and the annular portion 24 at the rear end of the shield shell 6 is crimped in the radial direction outside the braided folded portion 4a with the braided folded portion 4a positioned outside the shield sleeve 36. The braided connecting portion 37 is configured by connecting and fixing the members 4a, 24, and 36. If the braid 4a and the shield shell 6 can be brought into close contact with each other, the shield sleeve 36 can be omitted.

  As shown in FIG. 1, a small-diameter packing 9 is located behind the braided connection portion 37, and the packing 9 is pulled out by closing the rear opening 32 a of the annular wall 32 at the rear end of the outer housing 7 with a rear holder 38 made of insulating resin. Be blocked. The middle-diameter packing 3 of the outer periphery of the front portion of the outer housing 7 is in close contact with the inner peripheral surface of the front portion of the shield shell 6, and the large-diameter packing 8 inside the front portion of the outer housing 7 is in close contact with the outer peripheral surface of the front portion of the shield shell 6. To do. The front-side medium-diameter packing 3 prevents water from entering from the front opening of the shield shell 6, and the front-side large-diameter packing 8 prevents entry of grooves from the front opening of the outer housing 7. The small-diameter packing 9 prevents water from entering from the rear opening of the outer housing 7.

  The braided connection portion 37 is completely waterproofed by the rear packing 9 and the two front packings 3 and 8 and is liquid-tightly arranged in the rear portion of the outer housing 7. Thereby, the oxidation of the braided connection part 37 and the accompanying deterioration in shielding (electromagnetic shielding) are reliably prevented.

  The medium-diameter packing 3 protruding forward from the outer housing 7 together with the front portion of the inner housing 2 is in close contact with the inner peripheral surface of the hole 15a of the device 15 to prevent water from entering the device. The flange portion 21 of the shield shell 6 is positioned along the front surface of the flange portion 28 of the outer housing 7, and the flange portion 21 is in close contact with the wall portion of the device 15 and the flange portion 28 by bolting, and a conductive wall. The part 15 is grounded (shielded).

  7 and 8 are exploded views of the components of the shield connector 1 (FIG. 8 shows a cross-sectional view inverted by 90 ° with respect to FIG. 7). Diameter packing 3, inner housing 2, terminal packing 39, insulating resin terminal holder 40, shielded electric wire 4 with LA (hole plate) terminal 14, shield shell 6, shield sleeve 36, large diameter packing 8, an outer housing 7, a rear packing 9, and a rear holder 38 are shown.

  The front packing 3 is formed wide in the front-rear direction, and has inner and outer lips 3a, 3c, 3d at the front and rear, respectively. The front and rear flanges 17 of the inner housing 2 act as positioning parts for the packing 3, and the claw part 5 a of the rear locking piece 5 acts as a fixing part for the shield shell 6 together with the rear end surface 6 a of the peripheral wall 16.

  The terminal packing 39 has a narrow annular shape and is formed of synthetic rubber like the other packings 3, 8, and 9. The terminal packing 39 is externally inserted into the plate-like electrical contact portion 14 b of the terminal 14 together with the narrow annular terminal holder 40 to electrically It stops at the positioning protrusion 14c at the rear end of the contact portion 14b, and is inserted into the wide portion 13a (FIG. 5) of the terminal insertion hole 13 of the front wall 12 of the inner housing 2 as shown in FIG. Each packing 3, 8, 9, and 39 may be called a sealing member.

  The terminal 14 includes an electrical contact portion 14b in the first half and a wire connection portion 14a in the second half. The wire connection portion 14a is a cylindrical portion and is crimped (crimped) to the core wire portion (conductor portion) 4b of the shielded wire 4. The The braid 4a of the shielded electric wire 4 is folded back along the surface of the outer skin 4d. The shield sleeve 36 is extrapolated to the braided folded portion 4a. The shield shell 6 is shielded by inserting a shield wire 4 through the front end flange portion 21 and the locking portion 26, a rear wall portion 22 having a hole portion 30 for locking the locking piece 5 of the inner housing 2, and the shield wire 4. And a rear annular portion 24 for fixing the shell 6 by caulking.

  An annular packing 8 having a large diameter and a narrow width is accommodated in a groove 34 at the front end of the outer housing 7, and a flange portion 28 at the front end is joined to the flange portion 21 of the shield shell 6. 4 is accommodated, and the rear holder 38 is locked to the outer periphery of the annular portion 32 by a locking portion 38a, thereby preventing the packing 9 from coming off.

  In the above embodiment, the example in which the device 15 is directly attached has been described. However, for example, the flange portion 28 of the outer housing 7 is deleted, the flange portion 21 of the shield shell 6 is formed short, and the other shielded wire (see FIG. A female terminal of a terminal (not shown) is accommodated in an insulating housing (not shown) to form a mating connector (not shown), and the front half 3b of the front packing 3 is formed on the inner surface of the hood portion of the mating insulating housing. The shield shell (not shown) of the mating connector can be brought into contact with (contact with) the short flange (21) of the shield shell 6 so as to correspond to the mutual connection of the connectors. When the connectors are connected to each other, the flange portion 28 of the outer housing 7 can be screwed and fixed to the flange portion (not shown) of the mating connector.

  Moreover, in the said embodiment, although the inner housing 2 and the outer housing 7 were formed with insulating resin, it is also possible to form with insulating ceramic etc. besides resin. Further, a locking portion 26 provided at the outer end of the flange portion 21 (FIG. 4) of the shield shell 6 is provided at the center in the width direction of the flange portion 21, and at the center in the width direction of the flange portion 28 of the outer housing 7 (FIG. 4). It is also possible to insert and engage the locking portion 26 without being exposed to the locking projection (29a) in the hole (not shown) provided.

  Further, in the above embodiment, the packings 3, 8, and 9 are used to waterproof the shield connector 1. However, for example, when the waterproofing is unnecessary, the packings 3, 8, and 9 are excluded. Thus, the terminal 14 of the shielded electric wire 4 with a terminal is accommodated forward in the insulating inner housing 2, the conductive shield shell 6 is disposed outside the inner housing 2, and the shield shell 6 and the shielded electric wire 4 are braided. 4 a, an insulating outer housing 7 is disposed outside the shield shell 6, a locking piece 5 projects from the rear portion of the inner housing 2, and a locking piece 5 is formed on the rear wall 22 of the shield shell 6. A hole 30 for penetrating and engaging the claw portion 5a is provided, the claw portion 5a is visibly exposed before the outer housing 7 is mounted, and the claw portion 5a is covered and protected after the outer housing 7 is mounted. It is also possible that the formation of the shield connector.

  The shield connector according to the present invention enhances the waterproof property of the braided connection portion of the shielded electric wire when directly attached to a device such as an inverter of an automobile including a hybrid car, for example, and also fixes the inner housing and the shield shell. It can be used to ensure sex.

1 Shield Connector 2 Inner Housing 3 First Packing 3b Front Half (Projection)
4 Shielded wire 4a Braid 5 Locking piece 5a Claw part 6 Shield shell 7 Outer housing 8 Second packing 9 Third packing 14 Terminal 15 Equipment (mating side connector)
21 collar part 22 rear wall 28 collar part 30 hole part 37 braided connection part

Claims (4)

  The terminal of the shielded electric wire with a terminal is accommodated forward in an insulating inner housing, a conductive shield shell is disposed outside the inner housing, and the shield shell and the braid of the shielded electric wire are connected. Forming a braided connecting portion, an insulating outer housing is disposed outside the shield shell, and a first packing on the front side is disposed in close contact between the inner housing and the shield shell, and the shield shell and the outer shell A second packing on the front side is disposed in close contact with the housing, and a third packing on the rear side is disposed in close contact between the shielded electric wire and the outer housing, and the first and second packings and the A shielded connector, wherein the braided connecting portion is waterproofly disposed between the third packing and the third packing.   A locking piece protrudes from the rear part of the inner housing, and a hole is formed in the rear wall of the shield shell to engage and engage the claw part of the locking piece. 2. The shielded connector according to claim 1, wherein said claw portion is covered and protected after the outer housing is mounted.   3. The shield connector according to claim 1, wherein the first packing protrudes forward from the shield shell, and a protruding portion of the packing is in close contact with the inner surface of the mating connector.   4. The shield connector according to claim 1, wherein the shield shell and the outer housing are overlapped with each other, and are fixed to the mating connector by screwing. 5.

Images