JP2012043649A - Waterproof connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a waterproof connector capable of improving contact reliability and a life of a contact part by preventing looseness of a front holder, and miniaturizing a waterproof packing.SOLUTION: A waterproof connector 31 has such a constitution that a looseness-preventing protrusion 75 of a front end 73a of a front holder 36 fitted and mounted to a tip of a terminal housing cylinder part 39 of a first connector housing 33 comes into contact with an opposed end face 50a of a second connector housing 34, when fitting of the first and second connector housings 33 and 34 is completed. A movement of the front holder 36 to a fitting direction is regulated.

Description

  The present invention relates to a waterproof connector.

FIG. 8 shows a conventional example of a waterproof connector.
The waterproof connector 1 shown in FIG. 8 is disclosed in Patent Document 1 below.
This waterproof connector 1 is disclosed in Patent Document 1 below, and includes a first connector housing 3, a second connector housing 4, an annular packing 5, and a front holder 6.

  The first connector housing 3 includes a terminal housing tube portion 9 that houses the female terminal 8 that is the first connection terminal, an outer tube portion 11 that defines a housing space 10 around the outer periphery of the terminal housing tube portion 9, and And a locking portion 12.

  The terminal accommodating cylinder portion 9 is formed with a terminal accommodating hole 9a for accommodating the female terminal 8 so as to penetrate forward from the rear end so that the female terminal 8 can be inserted from the rear end of the housing. The terminal accommodating cylinder portion 9 has a terminal locking lance 9b protruding into the terminal accommodating hole 9a. The terminal locking lance 9b engages with the female terminal 8 inserted into the terminal accommodating hole 9a up to the reference position to prevent the female terminal 8 from coming off.

  A housing space 10 on the outer periphery of the terminal housing tube portion 9 is a space for housing a fitting tube portion of the second connector housing 4 described later.

  The second connector housing 4 is inserted into the accommodating space 10 and is fitted on the outer periphery of the terminal accommodating cylinder portion 9 via the annular packing 5, and protrudes from the outer periphery of the fitting cylinder portion 17. And a terminal support portion 20 that supports a male terminal 19 as a second connection terminal to be fitted to the female terminal 8 on the inner side of the fitting cylinder portion 17.

  When the engagement between the first connector housing 3 and the second connector housing 4 is completed, the rear end 18a engages with the locking portion 12 of the first connector housing 3, and the engagement protrusion 18 The fitting state between the housing 3 and the second connector housing 4 is locked.

  The annular packing 5 is fitted and installed on the outer periphery of the base end side of the terminal accommodating cylinder portion 9, and when the fitting between the first connector housing 3 and the second connector housing 4 is completed, the terminal accommodating cylinder portion 9 and the fitting cylinder 17 are brought into close contact with each other, and the space between the terminal accommodating cylinder 9 and the fitting cylinder 17 is sealed (waterproof).

  The packing 5 includes a cylindrical portion 5a that is sandwiched between the terminal accommodating cylindrical portion 9 and the fitting cylindrical portion 17, and a flange portion 5b that protrudes radially outward from the rear end of the cylindrical portion 5a. Yes. When the fitting between the first connector housing 3 and the second connector housing 4 is completed, the distal end 17a of the fitting cylinder portion 17 comes into contact with the flange portion 5b.

  The front holder 6 includes an insertion part 6 a that is inserted into the terminal accommodating cylinder part 9 and a tip wall 6 b that covers the front surface of the terminal accommodating cylinder part 9. The distal end wall 6 b is set to have an outer diameter larger than the outer diameter of the terminal accommodating cylinder portion 9, and prevents the annular packing 5 from coming off. The distal end wall 6b has a terminal guide hole 6c for guiding the male terminal 19 to the female terminal 8 side. A positioning wall 6d for positioning the front end portion of the female terminal 8 is integrally formed with the tip wall 6b.

  That is, the front holder 6 is fitted and attached to the distal end portion of the terminal accommodating cylinder portion 9 to prevent the packing 5 from coming off and to position the distal end portion of the female terminal 8 inserted into the terminal accommodating hole 9a. .

  By the way, in such a waterproof connector 1, if a gap is generated in the fitting portion between the first connector housing 3 and the second connector housing 4 due to dimensional tolerance, assembly error, or the like, rattling occurs between the housings due to external vibration. Arise. The backlash between the housings causes sliding friction of the terminal contact portion between the female terminal 8 and the male terminal 19 and accelerates wear of the terminal contact portion. As a result, there arises a problem that the contact reliability and the life of the contact portion are reduced.

  Therefore, in the case of the waterproof connector 1, the flange portion 5b of the annular packing 5 is sandwiched between the tip of the fitting cylinder portion 17 and the first connector housing 3, thereby preventing rattling in the fitting direction between the housings. is doing. In addition, the inner peripheral portion of the fitting cylinder portion 17 is provided with a pressing protrusion 17 b that presses and contacts the outer periphery of the front end side of the cylindrical portion 5 a of the annular packing 5, so that the front end portion of the terminal accommodating cylinder portion 9 extends in the radial direction. Prevents rattling.

JP 2005-174813 A

  However, in the waterproof connector 1 disclosed in Patent Document 1, the outer periphery on the front end side of the annular packing 5 located near the front holder 6 is pressed and supported in order to prevent rattling on the front holder side. Therefore, the cylindrical portion 5a of the annular packing 5 needs a long length that wraps substantially the entire length of the terminal accommodating cylindrical portion 9, and there is a problem that the annular packing 5 is enlarged.

  Further, the position of the front holder 6 itself is not particularly restricted with respect to the second connector housing 4. Therefore, there is a possibility that the front holder 6 rattles between the terminal support portion 20 of the second connector housing 4 due to the influence of vibrations acting on the waterproof connector 1 from the outside. And since the play of the front holder 6 causes sliding friction of the terminal contact portion, there is a possibility that the vibration resistance is lowered and the life is shortened due to wear of the terminal contact portion.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, and prevents the front holder mounted on one connector housing from rattling, and further prevents the front holder from rattling the terminals, thereby improving contact reliability. It is an object of the present invention to provide a waterproof connector that can improve the performance and life of the contact portion, and can reduce the size of the waterproof annular packing attached to the fitting portion between the connector housings.

The above-described object of the present invention is achieved by the following configuration.
(1) a first connector housing provided with a terminal housing tube portion for housing a first connection terminal;
A second connector housing supporting a second connection terminal to be fitted to the first connection terminal inside a fitting cylinder portion to be fitted to an outer periphery of the terminal accommodating cylinder portion;
It is fitted on the outer periphery of the terminal accommodating cylinder, and is in close contact with the terminal accommodating cylinder and the fitting cylinder in a state where the first connector housing and the second connector housing are completely fitted. An annular packing that contacts and seals between the terminal accommodating cylinder and the fitting cylinder;
A front holder that is fitted and attached to the distal end of the terminal accommodating cylinder and serves to prevent the packing from being detached and to position the distal end of the first connection terminal;
A waterproof connector comprising:
The front end surface of the front holder has an inner depth of the second connector housing that faces the fitting direction of the connector housings in a state where the fitting of the first connector housing and the second connector housing is completed. A waterproof connector comprising a ratchet prevention protrusion that abuts against an end face and restricts movement of the front holder.

  (2) The backlash prevention protrusions provided on the front end surface of the front holder are two, and the two backlash prevention protrusions are on a horizontal line extending in the width direction of the connector housing perpendicular to the connector fitting direction. The waterproof connector according to (1), wherein the waterproof connector is disposed at both left and right edge portions on the front end surface of the front holder.

  (3) The backlash preventing projections provided on the front end surface of the front holder are two, and the two rattling preventing projections are perpendicular to the connector fitting direction and extend in the height direction of the connector housing. The waterproof connector according to (1) above, wherein the waterproof connector is disposed at upper and lower end edges on the front end surface of the front holder on a line.

  (4) The waterproof connector according to any one of (1) to (3), wherein movement of the first connection terminal is restricted by restricting movement of the front holder.

  According to the configuration of (1) above, when the first connector housing and the second connector housing are completely fitted, they are provided on the front end surface of the front holder attached to the front end portion of the first connector housing. The rattling-preventing protrusion comes into contact with the inner inner end face of the opposing second connector housing and restricts the movement of the front holder in the fitting direction. Therefore, even if vibration is applied to the waterproof connector from the outside, it is possible to prevent the front holder from rattling. Therefore, it is possible to prevent the terminal contact portion from sliding due to the terminal movement caused by the play of the front holder, and to suppress wear of the terminal contact portion. Accordingly, contact reliability and contact point life can be improved.

  Further, since the prevention of the backlash of the front holder has been solved by devising the structure of the front holder, the waterproof annular packing fitted to the terminal accommodating tube portion of the first connector housing is free from the backlash of the front holder. In order to prevent sticking, it is not necessary to extend to the vicinity of the tip of the terminal accommodating cylinder. Therefore, the packing can have a short structure that fits to the outer periphery of the base end side of the terminal housing cylinder portion of the first connector housing, and the packing can be downsized.

  According to the configuration of (2) above, there are two backlash preventing protrusions, and the two backlash preventing protrusions are on the front end of the front holder on the horizontal line extending in the width direction of the connector housing perpendicular to the connector fitting direction. It is arrange | positioned at the right-and-left both-ends edge part on a surface. For this reason, the two rattling-preventing projections can surely contact the inner end surface of the second connector housing, and the rattling of the front holder can be effectively prevented with a small number of rattling-preventing projections. Can do.

  According to the configuration of (3) above, there are two rattling prevention projections, and the two rattle prevention projections are perpendicular to the connector fitting direction and extend in the height direction of the connector housing on the front holder. It is arrange | positioned at the upper-and-lower-ends edge part on a front-end surface. For this reason, the two rattling-preventing projections can surely contact the inner end surface of the second connector housing, and the rattling of the front holder can be effectively prevented with a small number of rattling-preventing projections. Can do.

  According to the configuration of (4) above, the movement of the first connection terminal is restricted by restricting the movement of the front holder. Therefore, by restricting the movement of the front holder, it is possible to prevent the terminal contact portion from sliding due to the terminal movement caused by the play of the front holder and to suppress the wear of the terminal contact portion. Accordingly, contact reliability and contact point life can be improved.

  According to the waterproof connector of the present invention, when the fitting between the first connector housing and the second connector housing is completed, the ratchet prevention protrusion provided on the front end surface of the front holder is opposed to the second connector housing. This prevents the front holder from rattling by abutting against the inner end face. Therefore, it is possible to prevent the terminal contact portion from sliding due to the terminal movement caused by the play of the front holder, and to suppress wear of the terminal contact portion. Accordingly, contact reliability and contact point life can be improved.

  Further, since the prevention of the backlash of the front holder has been solved by devising the structure of the front holder, the waterproof annular packing fitted to the terminal accommodating tube portion of the first connector housing is free from the backlash of the front holder. In order to prevent sticking, it is not necessary to extend to the vicinity of the tip of the terminal accommodating cylinder. Therefore, the packing can have a short structure that fits to the outer periphery of the base end side of the terminal housing cylinder portion of the first connector housing, and the packing can be downsized.

It is a disassembled perspective view of 1st Embodiment of the waterproof connector which concerns on this invention. It is a vertical sectional view of the assembled state of the waterproof connector shown in FIG. It is an enlarged view of the A section of FIG. It is explanatory drawing of the front holder shown in FIG. 1, (a) is a perspective view from diagonally forward, (b) is a front view, (c) is a side view. It is a horizontal sectional view of the assembly state of 2nd Embodiment of the waterproof connector which concerns on this invention. It is an enlarged view of the B section of FIG. 6 is an explanatory view of the front holder shown in FIG. 5, (a) is a perspective view from obliquely forward, (b) is a front view, and (c) is a side view. It is a longitudinal cross-sectional view of the principal part of the assembly state of the conventional waterproof connector.

  Hereinafter, a preferred embodiment of a waterproof connector according to the present invention will be described in detail with reference to the drawings.

[First Embodiment]
1 to 4 show a first embodiment of a waterproof connector according to the present invention, FIG. 1 is an exploded perspective view of the waterproof connector of the first embodiment, and FIG. 2 is an assembly of the waterproof connector shown in FIG. FIG. 3 is an enlarged view of a portion A in FIG. 2, FIG. 4 is an explanatory view of the front holder shown in FIG. 1, FIG. 4 (a) is a perspective view obliquely from the front, and FIG. ) Is a front view, and FIG. 4C is a side view.

  The waterproof connector 31 of the first embodiment includes a first connector housing 33, a second connector housing 34, an annular packing 35, and a front holder 36.

  As shown in FIG. 1, the first connector housing 33 includes a terminal accommodating cylinder portion 39 that accommodates the first connection terminal 38 and an outer cylinder portion that defines an accommodating space 40 between the terminal accommodating cylinder portion 39 ( A hood portion 41 and a locking arm (lock arm) 42 are provided.

  The first connection terminal 38 is a female connection terminal including a wire crimping portion 38 a that is crimped and connected to an end portion of the electric wire 44, and a rectangular tube-shaped terminal fitting portion 38 b into which a male connection terminal is fitted. The electric wire 44 connected to the first connection terminal 38 is waterproof to prevent a raindrop or the like from entering the terminal accommodating hole 39a from outside by filling a gap between the terminal accommodating hole 39a of the terminal accommodating cylindrical portion 39 described later. A stopper 45 is attached.

  As shown in FIG. 2, the terminal accommodating tube portion 39 has a terminal accommodating hole 39a for accommodating the first connection terminal 38 extending forward from the rear end so that the first connection terminal 38 can be inserted from the rear end of the housing. Is formed. The terminal accommodating cylinder portion 39 is integrally formed with a terminal locking lance 39b protruding into the terminal accommodating hole 39a. The terminal locking lance 39b engages with the recess 38d of the first connection terminal 38 inserted into the terminal accommodation hole 39a up to the reference position, thereby preventing the first connection terminal 38 from coming off.

  A housing space 40 on the outer periphery of the terminal housing tube portion 39 is a space for housing a packing 35 and a fitting tube portion of the second connector housing 34 described later. In the innermost part of the accommodation space 40, there is an abutting surface 40 a that abuts the packing 35 fitted to the outer periphery of the base end of the terminal accommodating cylinder portion 39.

  When the engagement between the first connector housing 33 and the second connector housing 34 is completed, the locking arm 42 engages with a rear end of an engagement protrusion 48 of the second connector housing 34 described later to engage the second connector. The housing 34 is prevented from coming off.

  The second connector housing 34 is inserted into the accommodating space 40 and is fitted to the outer periphery of the terminal accommodating cylindrical portion 39 via an annular packing 35, and the axial direction of the fitting cylindrical portion 47 (see FIG. 2, in the direction of arrow E), a terminal support portion that supports an engagement protrusion 48 projecting on the outer periphery of the intermediate portion and a second connection terminal 49 to be fitted to the first connection terminal 38 inside the cylinder portion 47 for fitting. 50.

  When the engagement between the first connector housing 33 and the second connector housing 34 is completed, the rear end of the engagement protrusion 48 engages with the locking arm 42 of the first connector housing 33, as shown in FIG. Then, the fitting state between the first connector housing 33 and the second connector housing 34 is locked.

  The second connection terminal 49 is a male connection terminal that fits into the terminal fitting portion 38 b of the first connection terminal 38.

  As shown in FIG. 3, the inner surface of the terminal support portion 50 is an opposing surface 50 a that faces the front of the terminal accommodating cylinder portion 39 when the fitting between the first connector housing 33 and the second connector housing 34 is completed. is there.

  The annular packing 35 is fitted on the outer periphery of the base end side of the terminal accommodating cylinder portion 39, and when the fitting between the first connector housing 33 and the second connector housing 34 is completed, the terminal accommodating cylinder portion is provided. 39 and the fitting cylinder 47 are brought into close contact with each other, and the terminal accommodating cylinder 39 and the fitting cylinder 47 are sealed (waterproof).

  As shown in FIG. 2, the packing 35 of the present embodiment has a plurality of strips (3 in the drawing) on the inner peripheral surface that contacts the terminal accommodating cylinder portion 39 and the outer peripheral surface that contacts the fitting cylinder portion 47. Lip) is formed. Each lip is provided in a ring shape continuous in the circumferential direction. Each lip is brought into contact with the other party in an elastically deformed state to enhance the adhesion.

  As shown in FIG. 2, the packing 35 having the above-described configuration is in a state where the packing space 35 is in contact with the abutting surface 40 a of the storage space 40 when properly fitted to the outer periphery of the base end of the terminal storage cylinder portion 39. 40.

  As shown in FIG. 2, the front holder 36 includes a cylindrical portion 71 fitted and attached to the outer periphery of the distal end portion 39 c of the terminal accommodating cylindrical portion 39, and a distal end wall 73 that covers the front of the terminal accommodating hole 39 a. Yes. The cylindrical portion 71 has its rear end (right end in FIG. 2) close to the front end (left end in FIG. 2) of the packing 35 to prevent the annular packing 35 from coming off.

  Further, as shown in FIGS. 3 and 4, the distal end wall 73 has a terminal guide hole 73 c that guides the second connection terminal 49 toward the first connection terminal 38. Furthermore, on the inner side of the distal end wall 73, the distal end portion of the terminal fitting portion 38b of the first connection terminal 38 accommodated in the terminal accommodating cylinder portion 39 is positioned.

  Further, as shown in FIG. 2, the rear end of the tubular portion 71 enters the retreat area of the terminal locking lance 39b and restricts the movement of the terminal locking lance 39b to the retreat area. That is, the rear end of the cylindrical portion 71 functions as double locking means for locking the locked state of the first connection terminal 38 by the terminal locking lance 39b.

  That is, the front holder 36 is fitted and attached to the distal end portion 39c of the terminal accommodating cylinder portion 39 to prevent the packing 35 from being detached and to position the distal end portion of the first connection terminal 38 inserted into the terminal accommodating hole 39a. And functions as double locking means for restricting movement of the terminal locking lance 39b.

  In the case of the present embodiment, as shown in FIG. 4, the front end surface (front surface of the tip wall 73) 73 a of the front holder 36 is provided with a rattling prevention protrusion 75.

  In the case of this embodiment, there are two backlash prevention protrusions 75 provided on the front end surface 73a of the front holder 36, and the two backlash prevention protrusions 75 are in the connector fitting direction as shown in FIG. Are arranged at both upper and lower edge portions on the front end surface 73a of the front holder 36 on a vertical line Lv extending perpendicularly to the height direction of the connector housing.

  As shown in FIG. 3, the two rattling-preventing protrusions 75 are connected to each other in the mating direction between the connector housings 33 and 34 (see FIG. 3) when the first connector housing 33 and the second connector housing 34 are completely fitted. It abuts against the facing surface 50a, which is the inner end surface of the second connector housing 34 facing in the direction of arrow F).

  When the rattling-preventing protrusion 75 comes into contact with the opposing surface 50a, the front holder 36 is pressed against the base end side of the terminal accommodating cylinder part 39 by the reaction force, and the front holder 36 is connected to the terminal accommodating cylinder part 39, the terminal support part 50, The movement of the front holder 36 is restricted.

  In the waterproof connector 31 of the first embodiment described above, the front mounted on the distal end portion of the first connector housing 33 in a state where the first connector housing 33 and the second connector housing 34 are completely fitted. The two rattle-preventing projections 75 provided on the front end surface 73a of the holder 36 abut against the inner end surface of the opposing second connector housing 34 and restrict the movement of the front holder 36 in the fitting direction. Therefore, even if vibration is applied to the waterproof connector 31 from the outside, it is possible to prevent the front holder 36 from rattling. Therefore, it is possible to prevent the terminal contact portion from sliding due to the terminal movement caused by the backlash of the front holder 36, and to suppress the wear of the terminal contact portion. Accordingly, contact reliability and contact point life can be improved.

  Further, since the play prevention of the front holder 36 is solved by a device of the structure of the front holder 36 (equipment of the play prevention protrusion 75), the front holder 36 is fitted and installed in the terminal accommodating cylinder portion 39 of the first connector housing 33. The waterproof annular packing 35 does not need to be extended to the vicinity of the tip of the terminal accommodating cylinder portion 39 in order to prevent the front holder 36 from rattling. Accordingly, the packing 35 can have a short structure that fits to the outer periphery of the base end side of the terminal accommodating cylinder portion 39 of the first connector housing 33, and the packing 35 can be downsized.

  Further, in the waterproof connector 31 of the first embodiment, the backlash prevention protrusions 75 are two, and the two backlash prevention protrusions 75 are orthogonal to the connector fitting direction as shown in FIG. Are arranged at both upper and lower edge portions on the front end surface 73a of the front holder 36 on a vertical line Lv extending in the height direction. Therefore, the two rattling-preventing projections 75 can surely abut against the opposing surface 50a, which is the inner inner end surface of the second connector housing 34, and the front and back can be effectively prevented with a small number of rattling-preventing projections 75. The play of the holder 36 can be prevented.

[Second Embodiment]
5 to 7 show a second embodiment of a waterproof connector according to the present invention. FIG. 5 is a horizontal sectional view of an assembled state of the second embodiment of the waterproof connector according to the present invention. FIG. FIG. 7 is an explanatory view of a front holder used in the waterproof connector of the second embodiment, FIG. 7 (a) is a perspective view from an oblique front, FIG. 7 (b) is a front view, FIG. 7 (c) is a side view.

  The waterproof connector 31A of the second embodiment uses a front holder 36A instead of the front holder 36 shown in the first embodiment.

  The configuration in which the front holder 36A includes two backlash preventing protrusions 75 on the front end surface 73a is common to the front holder 36 of the first embodiment. However, in the case of the front holder 36A of the second embodiment, the two rattling prevention protrusions 75 are on a horizontal line Lh extending in the width direction of the connector housing perpendicular to the connector fitting direction, as shown in FIG. The left and right edge portions on the front end surface 73a of the front holder 36 are disposed.

  The front holder 36A differs from the front holder 36 of the first embodiment in the arrangement of the two rattling prevention protrusions 75, but the other configuration may be the same as in the first embodiment.

  Also in the case of the waterproof connector 31A of the second embodiment, as in the case of the first embodiment, the two rattle prevention protrusions 75 provided on the front end surface 73a of the front holder 36A are opposed to the second connector housing 34. The inner end of the inner surface of the front holder 36A, and the movement of the front holder 36A in the fitting direction is restricted. Therefore, even if vibration is applied to the waterproof connector 31A from the outside, it is possible to prevent the front holder 36A from rattling. Therefore, sliding of the terminal contact portion due to the backlash of the front holder 36A can be prevented, and wear of the terminal contact portion can be suppressed. Accordingly, contact reliability and contact point life can be improved.

  Further, since the rattling prevention of the front holder 36A is solved by the device of the structure of the front holder 36A (equipment of the rattling prevention projection 75), the front housing 36A is fitted and installed in the terminal accommodating cylinder portion 39 of the first connector housing 33. The waterproof annular packing 35 does not need to be extended to the vicinity of the tip of the terminal accommodating tube portion 39 in order to prevent the front holder 36A from rattling. Accordingly, the packing 35 can have a short structure that fits to the outer periphery of the base end side of the terminal accommodating cylinder portion 39 of the first connector housing 33, and the packing 35 can be downsized.

  Further, in the case of the waterproof connector 31A of the second embodiment, the back holder 36A has two backlash prevention protrusions 75, and the two backlash prevention protrusions 75 are orthogonal to the connector fitting direction. It is arrange | positioned at the both right-and-left edge part on the front end surface 73a of the front holder 36 on the horizontal line Lh extended in the width direction of a housing. For this reason, the two rattling-preventing projections 75 can surely abut against the inner end face of the second connector housing 34, and the rattling-preventing projections 75 of a small quantity can effectively prevent the rattling of the front holder 36. Can be prevented.

  The waterproof connector of the present invention is not limited to the above-described embodiments, and appropriate modifications and improvements can be made.

  For example, the number of rattling-preventing protrusions provided on the front end surface of the front holder is not limited to two as shown in the above embodiment, and may be a single or any plural number of three or more. Further, the mounting position of the rattling prevention protrusion is not limited to one vertical line Lv or one horizontal line Lh shown in the above embodiment.

  However, when the plurality of rattling prevention protrusions are arranged on one vertical line Lv or one horizontal line Lh, the contact between the front holder and the second connector housing 34 is limited to a straight line. Therefore, for example, compared to the case where a large number of backlash projections are randomly distributed over a wide area on the front end surface of the front holder, the positional accuracy of each backlash projection is affected by assembly errors, molding distortion, etc. It can suppress that it falls, and it is easy to stabilize the contact with each rattle prevention protrusion and the 2nd connector housing 34. FIG.

31 Waterproof connector 33 1st connector housing 34 2nd connector housing 35 Packing 36 Front holder 38 1st connection terminal 39 Terminal accommodating cylinder part 50 Terminal support part 50a Opposite surface (inner end face)
73 Tip wall 73a Front end surface 75 Anti-rattle projection

Claims (4)

A first connector housing having a terminal housing cylinder portion for housing the first connection terminal;
A second connector housing supporting a second connection terminal to be fitted to the first connection terminal inside a fitting cylinder portion to be fitted to an outer periphery of the terminal accommodating cylinder portion;
It is fitted on the outer periphery of the terminal accommodating cylinder, and is in close contact with the terminal accommodating cylinder and the fitting cylinder in a state where the first connector housing and the second connector housing are completely fitted. An annular packing that contacts and seals between the terminal accommodating cylinder and the fitting cylinder;
A front holder that is fitted and attached to the distal end of the terminal accommodating cylinder and serves to prevent the packing from being detached and to position the distal end of the first connection terminal;
A waterproof connector comprising:
The front end surface of the front holder has an inner depth of the second connector housing that faces the fitting direction of the connector housings in a state where the fitting of the first connector housing and the second connector housing is completed. A waterproof connector comprising a ratchet prevention protrusion that abuts against an end face and restricts movement of the front holder.   The backlash prevention protrusions provided on the front end surface of the front holder are two, and the two backlash prevention protrusions are located on a horizontal line extending in the width direction of the connector housing perpendicular to the connector fitting direction. The waterproof connector according to claim 1, wherein the waterproof connector is disposed at both left and right edge portions on the front end surface of the holder.   The backlash prevention protrusions provided on the front end surface of the front holder are two, and the two backlash prevention protrusions are on the vertical line extending in the height direction of the connector housing perpendicular to the connector fitting direction. The waterproof connector according to claim 1, wherein the waterproof connector is disposed at both upper and lower edge portions on the front end surface of the front holder.   The waterproof connector according to claim 1, wherein movement of the first connection terminal is restricted by restricting movement of the front holder.

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