JP2016024905A - Waterproof connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof connector capable of reducing the number of components and of saving a space.SOLUTION: A waterproof connector 11 comprises: an electric wire with a terminal 17 whose terminal 23 is connected with an electric wire 21; a housing 13 that is formed of an elastic resin material that can secure the watertight sealability, and that is adhered onto at least an outer coat 27 of the electric wire 21 by being molded so as to cover the electric wire 21 and a connection part 35 of the terminal 23, and on whose outer periphery an annular sealing part 37 tightly adhered onto an inner peripheral surface of an attaching hole of an adherend is protrusively provided, and on whose front end surface 39 a circumferential groove 59 is recessed so as to surround the terminal 23 along an inner side of the sealing part 37; and a front holder 15 provided with a pressing cylindrical part 57 press-fitted to the circumferential groove 59, and provided with a terminal through-hole penetrated by the terminal 23 protruded on the front end surface 39 of the housing 13, and that is attached to the front end surface 39.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a waterproof connector.

In a hybrid vehicle and an electric vehicle, a motor and an inverter are connected by a connector that is directly attached to a device (see, for example, Patent Document 1).
As shown in FIG. 7, this type of connector 501 includes a terminal-attached electric wire 503, a housing 505, a shield shell 507, a retainer 509, a sealing 511, an O-ring 513, a unit packing 515, and a rear holder 517. Have. The electric wire with terminal 503 is formed by connecting the conductor 523 of the electric wire 521 to the terminal 519. A terminal housing chamber 525 is formed in the housing 505. The terminal accommodating chamber 525 has a front opening as a terminal through hole 527 and a rear opening as a terminal insertion opening 529.

  In the electric wire with terminal 503 inserted into the terminal accommodating chamber 525, the electric contact portion of the terminal 519 protrudes from the terminal through hole 527. An electric wire 521 is led out from the terminal insertion opening 529. A space between the terminal through hole 527 and the terminal 519 is sealed watertight by an O-ring 513. A space between the terminal insertion opening 529 and the electric wire 521 is sealed watertight by a sealing 511. The separation of the sealing 511 from the housing 505 is restricted by the rear holder 517. In addition, a retainer 509 is attached to the housing 505, and the retainer 509 restricts the terminal 519 from coming off. A cylindrical shield shell 507 is fitted on the outer periphery of the housing 505. The shield shell 507 is provided with a bolt fixing hole 531 for fixing to a device as an adherend. An annular circumferential groove 535 is formed on the mounting front end surface 533 of the housing 505. A unit packing 515 is attached to the circumferential groove 535. In the connector 501, the shield shell 507 is bolted to the adherend, so that the unit packing 515 is pressure-bonded to the fixed surface of the device, and the housing 505 and the fixed surface are sealed in a watertight manner. Thereby, the connector 501 prevents oil leakage from the device and intrusion of water and dust from the outside to the inside of the device.

JP 2010-153143 A

  However, the above-described conventional device direct-attached type high voltage electric wire connector 501 having a waterproof function has a housing 505, a shield shell 507, a retainer 509, a sealing 511, an O-ring 513, and a unit according to the required functions. Packing 515, rear holder 517, etc. are required, and the number of parts increases. For this reason, the parts cost and processing cost (parts assembling cost) of the connector 501 increase. In addition, since a space (terminal accommodating chamber 525, terminal through hole 527, terminal insertion opening 529, circumferential groove 535) is required for each component, there is a limit to downsizing of the connector 501 in the case of the current structure.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a waterproof connector that can reduce the number of parts and save space.

The above object of the present invention is achieved by the following configuration.
(1) An electric wire with a terminal in which a terminal is connected to the electric wire, and an elastic resin material capable of ensuring a watertight seal, and is molded to cover at least the electric wire by covering the connecting portion between the electric wire and the terminal. An annular seal portion that adheres to the outer cover and is in close contact with the inner peripheral surface of the mounting hole of the adherend protrudes from the outer periphery, and is formed on the distal end surface so as to surround the terminal along the inner side of the seal portion. A housing in which a circumferential groove is recessed, a pressing cylinder portion that is press-fitted into the circumferential groove, and a terminal insertion hole through which the terminal protruding from the distal end surface of the housing is provided, are attached to the distal end surface. And a front holder.

According to the waterproof connector having the configuration (1), the front holder is attached to the front end surface of the housing in which the electric wire with terminal is molded. A pressing cylinder portion projects from the front holder. The pressing cylinder portion is press-fitted into a circumferential groove that is recessed in the front end surface of the housing. The front holder is made of a resin material having higher rigidity than the housing.
When the pressing cylinder part is press-fitted into the circumferential groove, the sealing part protruding to the outer periphery of the housing is supported by the pressing cylinder part, and excessive elastic deformation such as crushing is suppressed. Thereby, the housing ensures a good water-tight sealing property of the seal portion in close contact with the inner peripheral surface of the mounting hole.
Moreover, a part of the housing is pressed by the terminal when the pressing cylinder portion is press-fitted into the circumferential groove, so that the adhesion with the terminal is increased. This makes it difficult for a gap to form between the housing made of an elastic resin material and the terminal, and even if the elastic resin material is not bonded to metal, a good watertight seal between the terminal and the housing is ensured. The
Further, since the housing is bonded to the outer sheath of the electric wire, a good watertight sealing property between the electric wire and the electric wire is ensured.
As a result, the sealing such as unit packing and O-ring conventionally used in the watertight seal structure is eliminated.

(2) The waterproof connector configured as described in (1) above, wherein the connector is formed in an annular shape, and is fitted to the outer periphery of the housing by fitting the wire lead-out portion of the housing inward, and attached to the adherend. A waterproof shell comprising a shield shell having a fixing portion, wherein the shield shell is formed with a wire pressing cylinder portion that presses the wire lead-out portion from the outside in the radial direction of the wire by being attached to the housing. connector.

  According to the waterproof connector having the configuration (2) above, the wire pressing cylinder portion of the shield shell is attached to the outer periphery of the wire lead-out portion of the housing that leads out the wire. The wire pressing tube portion mounted on the wire lead-out portion presses the wire lead-out portion made of an elastic resin material from the outer side in the radial direction of the wire to the outer jacket. The elastic resin material forming the housing is bonded to the outer cover, and this elastic resin material is further pressed and held by the electric wire pressing cylinder portion of the shield shell. Thereby, even if an external force in the bending direction is applied to the electric wire, the electric wire outlet portion and the electric wire are not excessively bent, and the housing made of the elastic resin material is prevented from being peeled off from the outer cover.

(3) In the waterproof connector having the configuration according to (1) or (2), the front holder has a part of the housing on the opposite side of the pressing cylinder portion with the terminal insertion hole interposed therebetween. A waterproof connector characterized in that a pressing protrusion for pressing the terminal is protruded, and a pressing protrusion insertion portion into which the pressing protrusion is press-fitted is recessed at the front end surface of the housing.

  According to the waterproof connector having the above configuration (3), the pressing protrusion that protrudes from the front holder is press-fitted into the pressing protrusion insertion portion that is recessed in the front end surface of the housing. This pressing protrusion insertion portion also functions as a lightening portion for preventing sink marks during molding of the housing. By inserting the pressing protrusion of the front holder into the pressing protrusion insertion part, the terminal is pressed against the terminal on the opposite side of the pressing cylinder part by the pressing protrusion. Thereby, the watertight sealability between the terminal and the housing becomes more reliable.

(4) The waterproof connector according to any one of (1) to (3), wherein the front holder is separated from the housing by a lock mechanism provided between the pressing cylinder portion and the circumferential groove. Waterproof connector, characterized in that the release of the connector is restricted.

  According to the waterproof connector having the configuration (4), when the front holder is mounted on the front end surface of the housing, the pressing cylinder portion of the front holder is press-fitted into the circumferential groove on the front end surface, and the mounting of the front holder is completed. The release of the pressing cylinder part from the circumferential groove is regulated by a lock mechanism provided between the pressing cylinder part and the circumferential groove. Thereby, the front holder is locked to the housing by a lock mechanism having a simple structure using a press-fitting structure with the housing, and inadvertent dropping is prevented.

  According to the waterproof connector of the present invention, the number of parts can be reduced, and space saving can be achieved.

  The present invention has been briefly described above. Further, the details of the present invention will be further clarified by reading through a mode for carrying out the invention described below (hereinafter referred to as “embodiment”) with reference to the accompanying drawings. .

It is sectional drawing of the waterproof connector which concerns on one Embodiment of this invention. (A) is the perspective view which looked at the housing shown in Drawing 1 from the front, (b) is a longitudinal section of the housing shown in (a). It is a rear view of the housing shown to (a) of FIG. (A) is the perspective view which looked at the front holder shown in Drawing 1 from the back side, and (b) is a longitudinal section of the front holder shown in (a). It is a principal part expanded sectional view of the surrounding groove vicinity in the housing shown in FIG. (A) is a perspective view of the electric wire with terminal, (b) is a perspective view of the housing in which the electric wire with terminal is molded, (c) is an exploded perspective view of the waterproof connector before the front holder and the shield shell are assembled to the housing. FIG. 4D is a perspective view of a waterproof connector in which a front holder and a shield shell are assembled to a housing. It is a longitudinal cross-sectional view of the conventional connector.

Embodiments according to the present invention will be described below with reference to the drawings.
A waterproof connector 11 according to an embodiment of the present invention shown in FIG. 1 is an electrical connection between an inverter, a motor, and the like, which are electric devices mounted on a vehicle of an electric vehicle or a hybrid vehicle (hereinafter simply referred to as “device”). It is a waterproof connector that is used for directly attaching equipment when connecting. A motor mounted on a hybrid vehicle or an electric vehicle is supplied with a large current from an inverter or the like so that a high driving torque can be exhibited. Usually, such an electric wire connecting the inverter and the motor has a large conductor diameter (in order to reduce transmission loss), and a conductor with a large conductor diameter and its periphery is covered with an insulating coating having a high insulation performance ( Thick wire) is used. The waterproof connector 11 is suitable for use in a structure in which such a large-diameter electric wire is directly attached to a device.

The waterproof connector 11 according to this embodiment includes a terminal-attached electric wire 17, a housing 13, a front holder 15, and a shield shell 19.
The electric wire with terminal 17 is formed by connecting a terminal 23 to the end of the electric wire 21. The electric wire 21 is the above-described large-diameter electric wire 21 for large current (so-called thick electric wire), and includes a conductor 25 and an outer jacket 27 that insulates and coats the conductor 25. For the conductor 25, for example, a core wire made of copper (including tin-plated copper wire), aluminum, or aluminum alloy is used. The core wire may be a single wire, a plurality of parallel wires, or a plurality of wires twisted together. The terminal 23 is formed in a strip shape, and one end side in the longitudinal direction is a conductor connection portion 29 and the other end side in the longitudinal direction is a terminal contact portion 31. The terminal contact portion 31 is provided with a fastening hole 33 for connecting to the device side terminal. The conductor 25 is connected to the conductor connection portion 29 of the terminal 23 by ultrasonic welding, resistance welding, or the like.

  The housing 13 is made of an elastic resin material that can ensure a watertight seal. In addition to the insulation resistance and heat resistance required for conventional housing materials, for example, the elastic resin material having an insulating property is applied to components excluding the shield shell 19 and the terminal 23 (that is, the outer sheath 27 of the electric wire 21). A material having an adhesive strength and a hardness of not less than a rubber material and not more than a PBT material is selected. That is, it is desirable that the elastic resin material has a certain degree of flexibility in order to provide a watertight seal between the device-side housing as the adherend and the waterproof connector 11. This flexibility is required for the seal portion 37 of the housing 13, for example. As an elastic resin material having a certain degree of flexibility, for example, an elastomer resin material (thermoplastic elastomer) can be suitably used.

  By modifying the thermoplastic elastomer, it can be thermally bonded to ordinary polar thermoplastic resins such as polycarbonate and ABS resin, and light metals such as glass, various metals, aluminum and magnesium alloys, It becomes possible to make it excellent in flexibility and moldability.

As shown in FIGS. 1 to 3, the housing 13 is molded by an elastic resin material so as to cover the connection portion 35 between the electric wire 21 and the terminal 23. The elastic resin material is bonded to at least the outer jacket 27 of the electric wire 21. As the elastic resin material in the present embodiment, a material that easily adheres to the outer jacket 27 of the electric wire 21 is selected. The molded housing 13 is formed into a substantially elliptic cylinder shape. A plurality of (three) electric wires 17 with terminals are molded in parallel along the long axis direction of the housing 13.
On the outer periphery of the housing 13, an annular seal portion 37 (so-called lip portion) is provided so as to be in close contact with the inner peripheral surface of the mounting hole of the device-side housing. A circumferential groove 59 is recessed in the front end surface of the housing 13 so as to surround the terminal 23 along the inner side of the seal portion 37.

  The front end surface 39 of the housing 13 is provided with a plurality of (three) pressing protrusion insertion portions into which pressing protrusions of the front holder 15 described later are press-fitted. The pressing protrusion insertion portion is disposed in the vicinity thereof in accordance with each terminal 23. In the present embodiment, the pressing protrusion insertion portion includes a central quadrangular columnar portion 41 and left and right triangular columnar portions 43 and a triangular columnar portion 45 sandwiching the quadrangular columnar portion 41. These pressing protrusion insertion portions also act as a lightening portion for preventing sink marks during molding of the housing 13. In the vicinity of the square columnar portion 41, the triangular columnar portion 43, and the triangular columnar portion 45, a terminal through-hole 47 through which the terminal 23 protruding from the distal end surface 39 passes is located.

  On the housing 13, an electric wire lead-out portion 49 is protruded on the opposite side of the front end surface 39. The electric wire lead-out portion 49 includes a plurality (three in this embodiment) of electric wire holding cylinder portions 51 that cover the respective electric wires 21 led out from the housing 13. The holding cylinder base end parts 53 in the three electric wire holding cylinder parts 51 are integrally connected and molded. A pair of shield shell locking claws 55 are provided on the upper and lower surfaces of the holding cylinder base end portion 53 so as to protrude rearward. The shield shell locking claw 55 locks the electric wire pressing cylinder portion 79 of the shield shell 19 that covers the rear of the housing 13 and is fitted to the holding cylinder base end portion 53.

  The front holder 15 shown in FIG. 4 is attached to the front end surface 39 of the housing 13 from which the terminal 23 protrudes. The terminal 23 is inserted through. The front holder 15 includes a terminal engaging portion (not shown) that engages with the terminal 23. When the front holder 15 is mounted on the housing 13, the front holder 15 has a terminal holding function similar to that of the prior art that engages the terminal engaging portion with the terminal 23 to restrict the terminal 23 from coming off.

The front holder 15 is formed in a substantially elliptical column shape similar to the front view shape of the housing 13. The front holder 15 is provided with a pressing cylinder portion 57 that is press-fitted into the circumferential groove 59 of the housing 13 and a terminal insertion hole 73 through which the terminal 23 protruding from the distal end surface 39 of the housing 13 passes.
As shown in FIG. 5, the pressing cylinder portion 57 of the front holder 15 serves as a support for the seal portion 37 that protrudes to the outer periphery of the housing 13 when being pressed into the circumferential groove 59. As a result, excessive elastic deformation such as crushing of the seal portion 37 is suppressed, and an appropriate close pressure is obtained with respect to the inner peripheral surface of the mounting hole. Moreover, the adjacent part of the terminal 23 which is a part of the housing 13 is pressed into the terminal 23 by press-fitting the pressing cylinder part 57, and the adhesiveness with the terminal 23 is increased.

  Further, the front holder 15 is provided with a plurality of (three) pressing protrusions on the inner side of the pressing cylinder portion 57. Each pressing protrusion presses the terminal 23 via a part of the housing 13 (an adjacent part of the terminal 23) on the opposite side of the pressing cylinder part 57 across the terminal insertion hole 73. In the present embodiment, the pressing protrusion includes a central rectangular column pressing protrusion 61 shown in FIG. 4, and left and right triangular column pressing protrusions 63 and a triangular column pressing protrusion 65 sandwiching the rectangular column pressing protrusion 61. Yes. Then, the quadrangular column pressing protrusion 61 is fitted to the quadrangular columnar portion 41 on the front end surface 39 of the housing 13. The triangular prism pressing protrusions 63 and 65 are fitted into triangular prism portions 43 and 45 on the front end surface 39 of the housing 13, respectively.

  In the waterproof connector 11 according to this embodiment, a lock mechanism 67 is provided between the pressing cylinder portion 57 of the front holder 15 and the circumferential groove 59 of the housing 13. The lock mechanism 67 includes a lock recess 69 that is recessed in the outer peripheral surface of the pressing cylinder portion 57, and a lock protrusion 71 that protrudes from the inner wall surface of the peripheral groove 59. When the terminal 23 is inserted into the terminal insertion hole 73 of the front holder 15 and the pressing cylinder portion 57 is inserted into a predetermined position of the circumferential groove 59, the lock mechanism 67 locks the lock recess 69 and the lock recess 69 as shown in FIG. The protrusion 71 is engaged. Thereby, the front holder 15 is restricted from being detached from the housing 13 by the lock mechanism 67.

  In the present embodiment, the shield shell 19 is made of a conductive metal. The shield shell 19 is connected to a ground circuit on the device side by fastening the fixing portion 75 to the device side housing with a bolt or the like. Thereby, the electromagnetic wave from the conductor 25 molded in the housing 13 can be shielded (shielded). However, in the waterproof connector according to the present invention, the conductivity of the shield shell is not an essential component.

  The shield shell 19 is formed in an annular shape, and is fitted on the outer periphery of the housing 13 by fitting the wire lead-out portion 49 of the housing 13 inward. On the outer peripheral side of the shield shell 19, a fixing portion 75 for fixing to the device-side housing is formed. The fixing portion 75 has a bolt fixing hole 77 (see FIG. 6) formed in a fixing piece projecting outward.

  Further, the shield shell 19 is formed with a wire pressing cylinder portion 79 (see FIG. 1) that presses the wire lead-out portion 49 from the outside in the radial direction of the wire 21 by being attached to the housing 13. The electric wire pressing cylinder portion 79 overlaps the outer sheath 27 of the electric wire 21 and is fitted to the holding cylinder base end portion 53 of the housing 13. As shown in FIG. 1, the shield shell locking claw 55 projecting from the holding cylinder base end 53 has the shield shell 19 fitted to the outer peripheral side of the holding cylinder base end 53 as shown in FIG. By locking, detachment from the housing 13 is regulated.

Next, the operation of the waterproof connector 11 having the above configuration will be described.
In the waterproof connector 11 according to the present embodiment, as shown in FIG. 6A, the terminal-attached electric wire 17 in which the terminal 23 is connected to the terminal of the electric wire 21 is assembled in advance. As shown in FIG. 6B, the housing 13 is molded by an elastic resin material capable of ensuring a watertight sealing property.
Thereafter, as shown in FIG. 6C, the shield shell 19 and the front holder 15 are assembled to the housing 13, and the waterproof connector 11 shown in FIG. 6D is completed.

  The waterproof connector 11 is improved in waterproof performance between the device-side housing and the housing 13 and between the terminal 23 and the housing 13 by attaching the front holder 15 to the housing 13.

  The waterproof connector 11 has each function as follows. That is, the terminal 23 is responsible for the energization function. The front holder 15 and the housing 13 are responsible for the insulation function between the energization circuit and the components. The waterproof function between the electric wire 21 and the housing 13 is handled by the adhesive force of the housing 13 to the outer cover 27. The sealing portion 37 takes charge of the waterproof function between the inner peripheral surface of the mounting hole of the device side housing and the housing 13. The waterproof function between the terminal 23 and the housing 13 is such that the adjacent portion of the terminal 23 in the housing 13 pressed by the pressing cylinder portion 57 and the pressing protrusion (the rectangular column pressing protrusion 61 and the triangular column pressing protrusion 63, 65). Take charge. The shield shell 19 is responsible for shielding electromagnetic waves.

  And in the waterproof connector 11 which concerns on this embodiment, the connection part 35 of the electric wire 17 with a terminal is insulated by the housing 13 shape-molded by the elastic resin material. As for the electric wire 17 with a terminal, the jacket 27 is adhere | attached on the housing 13 by molding. In the terminal 23, only the terminal contact portion 31 connected to the mating terminal protrudes from the front end surface 39 of the housing 13.

  A seal portion 37 is continuously formed in an annular shape on the outer periphery of the housing 13 made of an elastic resin material capable of ensuring a watertight seal. The housing 13 is inserted into the mounting hole of the device-side casing, so that the space between the housing 13 and the inner peripheral surface of the mounting hole is sealed in a watertight manner by the seal portion 37.

  The housing 13 is indispensable to be bonded to the outer jacket 27, and may not be bonded to the metal terminal 23. Of course, the housing 13 may be bonded to the terminal 23. In other words, the housing 13 only needs to select an elastic material that adheres only to the outer cover 27, and the degree of freedom of material selection can be increased compared to the case of selecting an elastic material that adheres to both the terminal 23 and the outer cover 27. it can.

  The front holder 15 is attached to the front end surface 39 of the housing 13 in which the electric wire 17 with terminals is molded. A pressing cylinder 57 is projected from the front holder 15. The pressing cylinder portion 57 is press-fitted into a circumferential groove 59 that is recessed in the distal end surface 39 of the housing 13. The pressing cylinder portion 57 press-fitted into the circumferential groove 59 is disposed between the seal portion 37 and the terminal 23. The front holder 15 is made of a resin material having higher rigidity than the housing 13.

  When the pressing cylinder part 57 is press-fitted in the circumferential groove 59, the sealing part 37 protruding to the outer periphery of the housing 13 is supported by the pressing cylinder part 57, and excessive elastic deformation such as crushing is suppressed. Thereby, the housing 13 ensures a good watertight sealing property of the seal portion 37 that is in close contact with the inner peripheral surface of the mounting hole.

  Further, a part of the housing 13 (adjacent portion of the terminal 23) is pressed into the peripheral groove 59 by the pressing cylinder portion 57 being pressed into the circumferential groove 59, so that adhesion with the terminal 23 is increased. As a result, a gap is hardly generated between the housing 13 made of an elastic resin material and the terminal 23, and a good watertight seal between the terminal 23 and the housing 13 is obtained even when the elastic resin material is not bonded to metal. Sex is secured.

  Further, since the housing 13 is bonded to the outer jacket 27 of the electric wire 21, a good watertight sealing property with the electric wire 21 is ensured.

  As a result, the waterproof connector 11 eliminates the sealing of unit packings and O-rings that have been conventionally used for watertight seal structures. As a result, the waterproof connector 11 has a simple structure, ensures the same watertight seal as the conventional waterproof connector, and can reduce the number of components.

  In the waterproof connector 11 of the present embodiment, the wire pressing cylinder portion 79 of the shield shell 19 is attached to the outer periphery of the wire lead-out portion 49 of the housing 13 that leads out the wire 21. The wire pressing cylinder portion 79 attached to the wire lead-out portion 49 presses the wire lead-out portion 49 made of an elastic resin material against the outer jacket 27 from the outside in the radial direction of the wire 21. The elastic resin material forming the housing 13 is bonded to the outer cover 27, and this elastic resin material is further pressed and held by the electric wire pressing cylinder portion 79 of the shield shell 19. As a result, even when an external force in the bending direction is applied to the electric wire 21, the electric wire outlet portion 49 and the electric wire 21 are not excessively bent, and the housing 13 made of an elastic resin material is prevented from being separated from the outer cover 27. .

  Further, in the waterproof connector 11 of the present embodiment, the quadrangular columnar pressing projection 61 and the triangular column pressing projections 63 and 65 protruding from the front holder 15 are formed into a rectangular columnar portion 41 that is recessed in the front end surface 39 of the housing 13. And the triangular prisms 43 and 45, respectively. The square columnar portion 41 and the triangular columnar portions 43 and 45 also function as a lightening portion for preventing sink marks when the housing 13 is molded. By inserting the quadrangular column pressing protrusion 61 and the triangular column pressing protrusions 63 and 65 of the front holder 15 into the rectangular columnar portion 41 and the triangular columnar portions 43 and 45, the terminal 23 is opposite to the pressing cylinder portion 57. In addition, a part of the housing 13 (an adjacent part of the terminal 23) is pressed by the quadrangular column pressing projection 61 and the triangular column pressing projections 63 and 65. Thereby, the watertight sealability between the terminal 23 and the housing 13 becomes more reliable.

  Furthermore, in the waterproof connector 11 of this embodiment, when the front holder 15 is mounted on the front end surface 39 of the housing 13, the pressing cylinder portion 57 of the front holder 15 is press-fitted into the circumferential groove 59 of the front end surface 39, and the front holder 15 15 is completed, the pressing cylinder portion 57 is restricted from being detached from the circumferential groove 59 by a lock mechanism 67 provided between the pressing cylinder portion 57 and the circumferential groove 59. Thereby, the front holder 15 is locked to the housing 13 by the lock mechanism 67 having a simple structure using a press-fitting structure with the housing 13, and inadvertent dropping is prevented.

  Therefore, according to the waterproof connector 11 according to the present embodiment, it is possible to reduce the number of parts and save space.

Here, the features of the embodiment of the waterproof connector according to the present invention described above will be briefly summarized below.
[1] An electric wire with terminal (17) in which the terminal (23) is connected to the electric wire (21);
It is made of an elastic resin material capable of ensuring a watertight seal, and is molded so as to cover the connecting portion (35) of the electric wire (21) and the terminal (23), so that at least the outer sheath of the electric wire (21) ( 27) and an annular seal portion (37) that is in close contact with the inner peripheral surface of the mounting hole of the adherend is provided on the outer periphery, and the terminal (23) along the inner side of the seal portion (37). A housing (13) having a circumferential groove (59) recessed in the front end surface (39) so as to surround
A pressing tube portion (57) to be press-fitted into the circumferential groove (59) is provided, and a terminal insertion hole (73) through which the terminal (23) protruding from the distal end surface (39) of the housing (13) passes is provided. A front holder (15) provided and attached to the tip surface (39);
A waterproof connector (11) comprising:
[2] The waterproof connector (11) according to [1] above,
It is formed in an annular shape, and is fitted on the outer periphery of the housing (13) by fitting the wire lead-out portion (49) of the housing (13) inside, and has a fixing portion (75) to the adherend. With a shield shell (19),
The shield shell (19) is formed with a wire pressing cylinder portion (79) for pressing the wire lead-out portion (49) from the outside in the radial direction of the wire (21) by being mounted on the housing (13). The waterproof connector (11) characterized by the above-mentioned.
[3] The waterproof connector (11) according to the above [1] or [2],
The terminal (23) is pressed against the front holder (15) via a part of the housing (13) on the opposite side of the pressing cylinder part (57) across the terminal insertion hole (73). Pressing projections (square column pressing projections 61 and triangular column pressing projections 63, 65) are provided so as to protrude from the tip surface (39) of the housing (13). The waterproof connector (11) is characterized in that a pressing protrusion insertion portion (a square columnar portion 41 and a triangular columnar portion 43, 45) into which 61 and a triangular column pressing protrusion 63, 65) are press-fitted is recessed.
[4] The waterproof connector (11) according to any one of [1] to [3],
The front holder (15) is restricted from being detached from the housing (13) by a lock mechanism (67) provided between the pressing tube portion (57) and the circumferential groove (59). A waterproof connector (11).

  In addition, this invention is not limited to embodiment mentioned above, A deformation | transformation, improvement, etc. are possible suitably. In addition, the material, shape, dimensions, number, arrangement location, and the like of each component in the above-described embodiment are arbitrary and are not limited as long as the present invention can be achieved.

DESCRIPTION OF SYMBOLS 11 ... Waterproof connector 13 ... Housing 15 ... Front holder 17 ... Electric wire 19 with a terminal ... Shield shell 21 ... Electric wire 23 ... Terminal 27 ... Outer jacket 35 ... Connection part 37 ... Sealing part 39 ... End face 41 ... Square columnar part (pressing protrusion) Part insertion part)
43, 45 ... Triangular prism-shaped part (pressing protrusion insertion part)
49 ... Electric wire lead-out part 57 ... Pressing cylinder part 59 ... Circumferential groove 61 ... Square pillar pressing protrusion (pressing protrusion)
63, 65 ... Triangular prism pressing projection (pressing projection)
67 ... Lock mechanism 73 ... Terminal insertion hole 75 ... Fixing part 79 ... Electric wire pressing cylinder part

Claims (4)

An electric wire with a terminal having a terminal connected to the electric wire;
It is made of an elastic resin material capable of ensuring a watertight seal, and is bonded to at least the outer sheath of the wire by being molded over the connecting portion of the wire and the terminal, and the inner periphery of the attachment hole of the adherend A housing in which a ring-shaped seal portion that is in close contact with the surface protrudes from the outer periphery, and a circumferential groove is recessed in the distal end surface so as to surround the terminal along the inner side of the seal portion;
A front holder that is provided with a pressing cylinder portion that is press-fitted into the circumferential groove, and that is provided with a terminal insertion hole through which the terminal protruding on the front end surface of the housing passes, and is mounted on the front end surface;
A waterproof connector comprising: The waterproof connector according to claim 1,
It is formed in an annular shape, and includes a shield shell that is fitted on the outer periphery of the housing by fitting the wire lead-out portion of the housing inward and has a fixing portion to the adherend,
The waterproof connector, wherein the shield shell is formed with a wire pressing cylinder portion that presses the wire lead-out portion from the outside in the radial direction of the wire by being attached to the housing. The waterproof connector according to claim 1 or 2,
On the front holder, a pressing protrusion for pressing the terminal via a part of the housing protrudes on the opposite side of the pressing cylinder portion across the terminal insertion hole,
A waterproof connector, wherein a pressing protrusion insertion portion into which the pressing protrusion is press-fitted is recessed at a front end surface of the housing. The waterproof connector according to any one of claims 1 to 3,
The waterproof connector, wherein the front holder is restricted from being detached from the housing by a lock mechanism provided between the pressing cylinder portion and the circumferential groove.

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