JP2020024825A - Seal structure and waterproof connector with the seal structure - Google Patents

Abstract

To provide a waterproof connector with a seal structure capable of improving terminal insertability by reducing positional displacement between a wire insertion hole of a waterproof member and a corresponding through-hole of a waterproof member cover.SOLUTION: A waterproof connector comprises: a mat seal 30 which is mounted at a rear side of a housing 20 including multiple terminal accommodation chambers 51 and seals a gap between the housing 20 and a wire 67 passed through multiple wire insertion holes 31; and a mat seal cover 40 which includes through-holes 42 on the same center line as the wire insertion holes 31 and by which the mat seal 30 is pressed from a rear side and fixed to the housing 20. The mat seal 30 includes, on a rear face 34a, multiple first projections 33 constituting a first columnar surface 37 extending backward continuously in a part of inner peripheral surfaces of the wire insertion holes 31. The mat seal cover 40 includes, on a front face 44a, multiple second projections 43 fitted with the multiple first projections 33 and constituting a second columnar surface 47 extending forward continuously in a part of inner peripheral surfaces of the through-holes 42.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a seal structure and a waterproof connector provided with the seal structure.

A housing having a plurality of terminal accommodating chambers for accommodating terminals connected to the ends of the electric wires, and an electric wire insertion hole provided at each position corresponding to each terminal accommodating chamber and arranged behind the housing and the electric wires and 2. Description of the Related Art A waterproof connector including a waterproof member that seals between a housing and a waterproof member cover that attaches the waterproof member to the housing is known (for example, see Patent Documents 1 to 6).
This type of waterproof connector is used in a multi-pole connector in particular, since a plurality of electric wire insertion holes are provided in the waterproof member, and the work of attaching the waterproof member can be performed only once.

JP 2001-15204 A JP 2008-166045 A JP 2012-221785 A JP-A-2015-191831 JP 2015-210952 A JP 2017-143021 A

By the way, in the above-described waterproof connector, when the terminal connected to the end of the electric wire is accommodated in each terminal accommodating chamber of the housing, a waterproof member and a waterproof member cover are arranged in advance behind the housing, The terminal must be inserted from the back into the through hole of the waterproof member cover and the electric wire insertion hole of the waterproof member.
However, in the waterproof member provided with a plurality of electric wire insertion holes, each electric wire insertion hole is continuously formed via a rubber material which is a material of the waterproof member. Therefore, for example, when inserting a terminal and an electric wire into one electric wire insertion hole, if the electric wire is already passed through the adjacent electric wire insertion hole, the center line of the corresponding electric wire insertion hole and the center line of the through hole correspond to each other. , A positional deviation occurs, and the spread of one electric wire insertion hole is also different.
For this reason, when the terminal is inserted into the through hole of the waterproof member cover, the terminal subsequently tries to pass through the wire insertion hole of the waterproof member while elastically expanding the wire insertion hole. If the position of the through hole is shifted from the center line, the terminal cannot smoothly enter the electric wire insertion hole, and the terminal insertability decreases. Furthermore, if the terminal is forced into the electric wire insertion hole, the tip of the terminal may damage the sealing portion of the waterproof member.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to reduce a displacement between an electric wire insertion hole of a waterproof member and a corresponding through hole of a waterproof member cover, and improve terminal insertability. And a waterproof connector provided with the seal structure.

The above object according to the present invention is achieved by the following configurations.
(1) A terminal has a plurality of wire insertion holes through which wires connected to terminals are passed, and is mounted behind a housing having a plurality of terminal accommodating chambers, and is passed through the housing and the plurality of wire insertion holes. A waterproofing member that seals between the electric wires,
A waterproof member cover through which the electric wire is passed, having a through hole on the same center line as the electric wire insertion hole, and pressing the waterproof member from behind to fix the waterproof member to the housing,
A seal structure comprising:
The waterproof member includes, on a rear surface thereof, a plurality of first protrusions forming a first cylindrical surface extending rearward continuously to at least a part of an inner peripheral surface of the electric wire insertion hole,
The waterproof member cover has a front surface fitted with the plurality of first projections, and a second cylindrical surface extending forward at least continuously to at least a part of the inner peripheral surface of the through hole. And a second convex portion of
A seal structure characterized by the above.

According to the seal structure of the above configuration (1), the plurality of first protrusions provided on the rear surface of the waterproof member and the plurality of second protrusions provided on the front surface of the waterproof member cover are fitted, A first cylindrical surface extending rearward continuously to at least a part of the inner peripheral surface of the electric wire insertion hole, and a second cylindrical surface extending forward continuously to at least a part of the inner peripheral surface of the through hole. Thus, between the rear surface of the waterproof member and the front surface of the waterproof member cover, a cylindrical opening having a center line on the same straight line as the center line of the corresponding electric wire insertion hole and the through hole is defined. Therefore, the terminal inserted from the rear into the through hole of the waterproof member cover is guided by the inner peripheral surface of the cylindrical opening, enters the electric wire insertion hole of the waterproof member, and can smoothly pass through the electric wire insertion hole.
Further, the first convex portion and the second convex portion that define the cylindrical opening by the first cylindrical surface and the second cylindrical surface are fitted to each other so as to intersect the center line of the cylindrical opening. Elastic deformation is regulated. Therefore, the center line of the cylindrical opening defined by the first cylindrical surface of the first convex portion and the second cylindrical surface of the second convex portion is set even when the electric wire is already passed through the adjacent cylindrical opening. And the center line of the corresponding electric wire insertion hole and the through hole is hardly shifted.
Therefore, it is possible to reduce the displacement between the electric wire insertion hole of the waterproof member and the corresponding through hole of the waterproof member cover, and improve the terminal insertability.

(2) The seal structure according to (1),
The seal structure, wherein the first cylindrical surface and the second cylindrical surface are formed by partial cylindrical surfaces having a pair of arc shapes in a cross section orthogonal to the terminal insertion direction.

  According to the seal structure of the above configuration (2), the first cylindrical surface is constituted by a pair of partial cylindrical surfaces opposed to each other across the electric wire insertion hole, and the second cylindrical surface is opposed to each other across the through hole. And a pair of partial cylindrical surfaces. Therefore, a first convex portion formed between adjacent wire insertion holes to form a first cylindrical surface by a pair of partial cylindrical surfaces, and a first convex portion formed by a pair of partial cylindrical surfaces to form a second cylindrical surface. The second projections formed between the through-holes can be downsized. Therefore, it is possible to cope with a waterproof member having a narrow pitch interval between the wire insertion holes and a waterproof member cover having a narrow pitch interval between the through holes.

(3) A waterproof connector comprising the seal structure according to (1) or (2).

  According to the waterproof connector of the above configuration (3), a good waterproof connector is provided in which the displacement between the electric wire insertion hole of the waterproof member and the corresponding through hole of the waterproof member cover is reduced, and the terminal insertability is improved. be able to.

  ADVANTAGE OF THE INVENTION According to this invention, the seal | sticker structure which can reduce the displacement between the electric wire insertion hole of a waterproofing member and the corresponding through-hole of a waterproofing member cover, and can improve terminal insertion property, and the waterproof connector provided with this sealing structure Can be provided.

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

It is an exploded perspective view of a waterproof connector provided with a seal structure concerning a 1st embodiment of the present invention. FIG. 2 is an exploded sectional view of a mounting portion of a waterproof member and a waterproof member cover shown in FIG. 1. It is sectional drawing of the waterproof connector in the state before terminal insertion. FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3. It is a figure which shows the shape of the back surface side of a waterproofing member, (a) is a perspective view of the back surface side of a waterproofing member, (b) is sectional drawing of a cross section orthogonal to the terminal insertion direction in the 1st convex part of a waterproofing member. is there. It is a figure which shows the front side shape of a waterproofing member cover, (a) is a perspective view of the front side of a waterproofing member cover, (b) is a cross section orthogonal to the terminal insertion direction in the 2nd convex part of a waterproofing member cover. It is sectional drawing. 7A is a cross-sectional view of a main part of the waterproof connector in a state where a terminal is being inserted, and FIG. 7B is a cross-sectional view of a main part of a waterproof member and a waterproof member cover in a VII-VII cross section of FIG. It is a figure which shows the shape of the rear surface side of the waterproof member which concerns on 2nd Embodiment of this invention, (a) is a perspective view of the rear surface side of a waterproof member, (b) is a terminal insertion in the 1st convex part of a waterproof member. It is sectional drawing of the cross section orthogonal to a direction. It is a figure which shows the shape of the front side of the waterproof member cover which concerns on 2nd Embodiment of this invention, (a) is a perspective view of the front side of a waterproof member cover, (b) is a 2nd convex part of a waterproof member cover. 5 is a cross-sectional view of a cross section orthogonal to the terminal insertion direction in FIG.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a waterproof connector 10 having a seal structure according to a first embodiment of the present invention. FIG. 2 is an exploded sectional view of a mounting portion of the mat seal 30 and the mat seal cover 40 shown in FIG. FIG. 3 is a cross-sectional view of the waterproof connector 10 in a state before terminal insertion. FIG. 4 is a sectional view taken along the line IV-IV in FIG.

  As shown in FIGS. 1 to 4, the waterproof connector 10 according to the first embodiment includes a housing 20 made of a synthetic resin, and a rubber or flexible resin mat seal (waterproof member) fitted into the rear portion of the housing 20. A mat seal cover (waterproof member cover) 40 made of synthetic resin, which is fitted and fixed to the rear part of the housing 20 to prevent the mat seal 30 from falling off while pressing the mat seal 30 from the rear side. The housing 20 includes a packing 80, a front holder 70 mounted on a front portion of the housing 20, and a plurality of connection terminals (terminals) 65 housed in the housing 20 from behind.

  The waterproof connector 10 has a connecting portion 11 on the distal end side, and the connecting portion 11 on the distal end side is joined to the mating connector. The housing 20 has a connector portion 21 protruding toward the distal end side, which is the joining direction of the mating connector with the mating housing 61. The connector portion 21 is fitted into a fitting recess 62 formed in the mating housing 61 (see FIG. 3).

  The housing 20 is provided with hood portions 22 and 23 above and below the connector portion 21. The rear ends of the hoods 22 and 23 are connected to the connector 21 and extend to the front end. The connector 21 is covered with upper and lower hoods 22 and 23. A window 24 is formed in the lower hood 23.

  The housing 20 has a lock portion 28 formed at an upper portion at a rear end thereof. The housing 20 is maintained in the joined state with the mating housing 61 by the locking portion 28 locking the mating mating housing 61.

  A plurality (3 × 12 in this embodiment) of terminal housing chambers 51 are formed in the connector section 21 of the housing 20 along the front-rear direction. The connection terminals 65 connected to the ends of the electric wires 67 from the rear end side of the connector portion 21 are inserted into and accommodated in these terminal accommodating chambers 51. The rear end side of the connector portion 21 is an electric wire lead-out portion 52, and an electric wire 67 connected to the connection terminal 65 is pulled out from the electric wire lead-out portion 52. A lance 53 is formed in each of the terminal accommodating chambers 51. These lances 53 lock the connection terminals 65 inserted and accommodated in the respective terminal accommodating chambers 51, and regulate the movement of the connection terminals 65 toward the rear end of the housing 20, which is the rear side in the insertion direction D1.

  As shown in FIG. 3, a retainer mounting hole 29 is formed in the connector portion 21. The retainer mounting hole 29 is formed in a direction orthogonal to the insertion direction D1 of the connection terminal 65 into the terminal accommodating chamber 51, and is opened below the connector 21 so as to communicate with the window 24 of the hood 23. ing. In this retainer mounting hole 29, a retainer 90, which is a double locking member, is fitted and mounted in the mounting direction D2.

  The retainer 90 has a plurality of (3 × 12 in this embodiment) communication holes 91 corresponding to the terminal accommodating chambers 51 of the connector portion 21, and a locking portion 92 is formed in these communication holes 91. Is formed. The retainer 90 fitted into the retainer mounting hole 29 is disposed in a temporary locking position where the retainer 90 is not completely fitted in the retainer mounting hole 29, and a full locking position in which the retainer 90 is completely fitted in the retainer mounting hole 29. The connection terminal 65 inserted into the terminal accommodating chamber 51 can be inserted into the communication hole 91 of the retainer 90 in a state where the retainer 90 is disposed at the temporary locking position with respect to the connector portion 21. On the other hand, in a state where the retainer 90 is disposed at the final locking position with respect to the connector portion 21, the connection terminal 65 inserted into the terminal accommodating chamber 51 and locked by the lance 53 is engaged with the lance 53. The stop portion 92 is doubly locked. Further, when the connection terminal 65 is not located at the predetermined position where the connection terminal 65 is locked by the lance 53 with respect to the terminal accommodating chamber 51 and is in an incompletely inserted state, the retainer 90 located at the temporary locking position is provided with a locking portion. 92 interferes with the connection terminal 65, and the movement to the final locking position is restricted. Therefore, by restricting the movement of the retainer 90 to the final locking position, half insertion of the connection terminal 65 into the terminal accommodating chamber 51 can be detected.

  The connector portion 21 has a packing mounting portion 25 on the back side that is behind the retainer mounting hole 29. A packing 80 is fitted to the connector section 21 from the joint end on the distal end side, and is disposed in the packing mounting section 25. The packing 80 is made of a flexible material such as rubber, for example, and is formed in an annular shape. The packing 80 comes into close contact with the inner peripheral surface at the edge of the fitting recess 62 of the mating housing 61 joined thereto. Thereby, the joint between the housing 20 and the mating housing 61 is waterproofed.

  A front holder 70 is attached to the distal end side of the connector section 21. The front holder 70 is formed of a synthetic resin, and has a front plate 71 and a cover 72. The cover portion 72 extends rearward from the peripheral edge of the front plate portion 71. The front plate 71 has an opening 73 at a position corresponding to the terminal accommodating chamber 51 of the connector 21. The connector unit 21 is covered by the mounted front holder 70 on the front surface and on the peripheral surface excluding the position where the retainer mounting hole 29 is formed on the tip side of the packing 80.

  In the connector section 21 to which the front holder 70 is attached, the movement of the connection terminal 65 inserted and accommodated in the terminal accommodating chamber 51 in the insertion direction D1 is restricted. Further, by mounting the front holder 70, the packing 80 mounted on the packing mounting portion 25 is prevented from being removed from the connector portion 21 by the front holder 70. When the connector portion 21 is fitted into the fitting concave portion 62 of the mating housing 61, a tab (not shown) protruding from the mating housing 61 is inserted into the connection terminal 65 from the opening 73, and And the connection terminal 65 are electrically connected.

The connector portion 21 has a seal mounting concave portion 55 formed on the rear end side of the electric wire leading portion 52. The mat seal 30 is fitted into the seal mounting concave portion 55 from the rear end side of the connector portion 21 and mounted.
5A and 5B are views showing the shape of the rear surface 34a side of the mat seal 30. FIG. 5A is a perspective view of the rear surface 34a side of the mat seal 30. FIG. It is sectional drawing of the cross section orthogonal to an insertion direction.

As shown in FIGS. 1 to 5, when the mat body 34 is fitted into the outer periphery of the mat body 34 and the inner periphery of the seal attachment recess 55 at the rear of the housing 20, the mat seal 30 is Has an outer peripheral lip portion 32 for sealing the gap. The mat seal 30 is made of a flexible material such as rubber, for example, and is formed in a substantially plate shape.
Electric wire insertion holes 31 are formed through the mat seal 30 at positions corresponding to the respective terminal accommodating chambers 51 of the housing 20 of the mat body 34. The electric wire insertion hole 31 is formed in a circular shape when viewed from the front. The connection terminals 65 are respectively inserted into the terminal accommodating chambers 51 through the electric wire insertion holes 31 in a state where the mat seal 30 is fitted into the inner periphery of the seal mounting recess 55 at the rear portion of the housing 20. At this time, a plurality of inner peripheral lip portions 36 which protrude from the inner surface of each electric wire insertion hole 31 in the circumferential direction and are provided at intervals in the axial direction are provided on the inner surface of each electric wire insertion hole 31. By tightly contacting the outer periphery, the space between each electric wire 67 and the housing 20 is collectively sealed.

  As shown in FIGS. 5A and 5B, the mat seal 30 extends rearward from the rear surface 34a of the mat body 34 so as to be continuous with a part of the inner peripheral surface of the wire insertion hole 31. A plurality (26 in the present embodiment) of the first convex portions 33 constituting one cylindrical surface 37 are provided. The first protrusion 33 is a substantially rectangular parallelepiped protrusion integrally formed on the rear surface 34a of the mat body 34. The plurality of first protrusions 33 are provided between adjacent (3 × 12 in this embodiment) wire insertion holes 31 and are arranged in a checkered pattern.

  As shown in FIG. 5B, the first cylindrical surface 37 is formed by partial cylindrical surfaces 37a and 37b having a pair of arc shapes in a cross section orthogonal to the terminal insertion direction. That is, the plurality of first protrusions 33 arranged in a checkered pattern have partial cylindrical surfaces 37 a and 37 b formed at corners facing the electric wire insertion holes 31, respectively, and the first cylindrical surface 37 sandwiches the electric wire insertion holes 31. And is constituted by a pair of partial cylindrical surfaces 37a and 37b opposed to each other. Each of these partial cylindrical surfaces 37a and 37b has a semicircular shape having an angle of 90 degrees in a cross section orthogonal to the terminal insertion direction.

  FIGS. 6A and 6B are views showing the shape of the front side of the mat seal cover 40, wherein FIG. 6A is a perspective view of the front side of the mat seal cover 40, and FIG. It is sectional drawing of the cross section orthogonal to a terminal insertion direction.

  As shown in FIGS. 1 to 4 and 6, the mat seal cover 40 is attached to the seal mounting recess 55 at the rear of the housing 20 via the mat seal 30, so that the mat seal 30 is prevented from falling off and held. The mat seal 30 has a function of applying a pressing force for exhibiting a sufficient sealing property. In the cover body 44 of the mat seal cover 40 made of a synthetic resin molded product, a plurality of (for connecting the connection terminals 65 and pulling out the electric wires 67 rearward at positions corresponding to the respective electric wire insertion holes 31 of the mat seal 30). In this embodiment, (3 × 12) through holes 42 are provided. The through hole 42 is formed in a circular shape when viewed from the front, and the connection terminal 65 is inserted into the through hole 42.

  As shown in FIGS. 1 and 6, a lock portion 45 is formed around the mat seal cover 40, and the lock portion 45 is a locking lock formed on both sides at the rear end of the housing 20. The hole 26 is engaged. In addition, an erroneous fitting prevention protrusion 48 is provided on an upper portion of the mat seal cover 40, and the erroneous fitting prevention protrusion 48 engages with an engagement groove 27 formed at an upper portion at a rear end of the housing 20. Is done. Therefore, the mounting direction when the mat seal cover 40 is mounted in the seal mounting recess 55 is restricted.

  The mat seal cover 40 is arranged at the locking position with respect to the housing 20 by the locking portion 45 engaging with the locking lock hole 26. By arranging the mat seal cover 40 at the locking position with respect to the housing 20, the mat seal 30 is pressed into the seal mounting recess 55 while being compressed and deformed in the mounting direction. As a result, the outer peripheral portion of the mat seal 30 is enlarged in diameter and the outer peripheral lip portion 32 is pressed against the inner peripheral surface of the seal mounting concave portion 55. The lip portion 36 is pressed, and the mat seal 30 can exhibit sufficient sealing properties.

  As shown in FIGS. 6A and 6B, the mat seal cover 40 complementarily fits with the plurality of first protrusions 33 on the front surface 44 a of the cover body 44, and the inner periphery of the through hole 42. A plurality of (in the present embodiment, 26) second convex portions 43 constituting a second cylindrical surface 47 continuously extending forward from a part of the surface are provided. The second protrusion 43 is a substantially rectangular parallelepiped protrusion integrally formed on the front surface 44 a of the cover main body 44. And a plurality of 2nd convex parts 43 are protruded between a plurality of adjacent through holes 42, respectively, and are arranged in a checkered pattern.

  As shown in FIG. 6B, the second cylindrical surface 47 is constituted by partial cylindrical surfaces 47a and 47b having a pair of arc shapes in a cross section orthogonal to the terminal insertion direction. That is, the plurality of second convex portions 43 arranged in a checkered pattern have partial cylindrical surfaces 47 a and 47 b formed at corners facing the through holes 42, respectively, and the second cylindrical surfaces 47 face each other with the through holes 42 interposed therebetween. It is constituted by a pair of arranged partial cylindrical surfaces 47a, 47b. Each of these partial cylindrical surfaces 47a and 47b has a semicircular shape having an angle of 90 degrees in a cross section orthogonal to the terminal insertion direction.

  7A is a cross-sectional view of a main part of the waterproof connector 10 in a state where the terminal is being inserted, and FIG. 7B is a cross-sectional view of the mat seal 30 and the mat seal cover 40 in the VII-VII cross section of FIG. 7A. It is principal part sectional drawing.

  As shown in FIGS. 3, 4, and 7, the plurality of first protrusions 33 provided on the rear surface 34 a of the mat seal 30 and the plurality of second protrusions 43 provided on the front surface 44 a of the mat seal cover 40 are fitted. By being combined, the first cylindrical surface 37 constituted by a pair of partial cylindrical surfaces 37 a and 37 b extending rearward continuously to a part of the inner peripheral surface of the electric wire insertion hole 31 and the through hole 42 A rear surface 34a of the mat seal 30 and a front surface 44a of the mat seal cover 40 are formed by a second cylindrical surface 47 constituted by a pair of partial cylindrical surfaces 47a and 47b continuously extending forward from a part of the inner peripheral surface. A plurality of cylindrical openings 50 having a center line X on the same straight line as the center lines of the corresponding electric wire insertion holes 31 and the through holes 42 are defined therebetween.

  Therefore, as shown in FIG. 7A, the connection terminal 65 inserted from the rear into the through hole 42 of the mat seal cover 40 is guided by the inner peripheral surface of the cylindrical opening 50 and the electric wire insertion of the mat seal 30 is performed. It can enter the hole 31 and pass through the electric wire insertion hole 31 smoothly.

  Further, the first convex portion 33 and the second convex portion 43, which define the plurality of cylindrical openings 50 by the first cylindrical surface 37 and the second cylindrical surface 47, are fitted to each other to form the cylindrical opening 50. Elastic deformation in the direction intersecting with the center line X is restricted. Therefore, the center line X of the cylindrical opening 50 defined by the first cylindrical surface 37 of the first convex portion 33 and the second cylindrical surface 47 of the second convex portion 43 is already in the adjacent cylindrical opening 50. Even when the electric wire 67 is passed, the center line of the corresponding electric wire insertion hole 31 and the center line of the through hole 42 hardly deviates.

  Therefore, according to the waterproof connector 10 having the seal structure according to the first embodiment, the displacement between the electric wire insertion hole 31 of the mat seal 30 and the corresponding through hole 42 of the mat seal cover 40 is reduced, and the terminal insertion is performed. Performance can be improved.

  FIGS. 8A and 8B are diagrams showing the shape of the rear surface 34a side of the mat seal 30A according to the second embodiment of the present invention, wherein FIG. 8A is a perspective view of the rear surface 34a side of the mat seal 30A, and FIG. It is sectional drawing of the cross section orthogonal to the terminal insertion direction in 30 A of 1st convex parts 33A. In addition, about the structure similar to the mat seal 30 of the said 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

As shown in FIG. 8, the mat seal 30 </ b> A according to the second embodiment has a plurality of (2 × 7 in the present embodiment) electric wires having a wider pitch interval than the mat seal 30 according to the first embodiment. The insertion hole 31 is formed through.
The mat seal 30A has a plurality (seven in this embodiment) of a first cylindrical surface 37A extending rearward continuously to the inner peripheral surface of the wire insertion hole 31 on the rear surface 34a of the mat body 34. The first protrusion 33A is provided. The first protrusion 33A is a substantially rectangular parallelepiped protrusion integrally formed on the rear surface 34a of the mat body 34. A plurality of first protrusions 33 </ b> A arranged in a checkered pattern are provided so as to surround the electric wire insertion hole 31.

  As shown in FIG. 8B, the first cylindrical surface 37A is configured by a cylindrical surface having a circular shape in a cross section orthogonal to the terminal insertion direction. That is, the plurality of first protrusions 33A arranged in a checkered pattern are each formed so as to surround the electric wire insertion hole 31, and the first cylindrical surface 37A is constituted by a cylindrical surface communicating with the electric wire insertion hole 31.

  9A and 9B are views showing the shape of the front surface 44a of the mat seal cover 40A, wherein FIG. 9A is a perspective view of the front surface 44a of the mat seal cover 40A, and FIG. 9B is a second projection of the mat seal cover 40A. It is sectional drawing of the cross section orthogonal to the terminal insertion direction in 43A. In addition, about the structure similar to the mat seal cover 40 of the said 1st Embodiment, the same code | symbol is attached | subjected and detailed description is abbreviate | omitted.

  As shown in FIG. 9, the mat seal cover 40 </ b> A complementarily fits with the plurality of first protrusions 33 </ b> A on the front surface 44 a of the cover main body 44, and continuously extends forward along the inner peripheral surface of the through hole 42. A plurality of (seven in the present embodiment) second projections 43A constituting the provided second cylindrical surface 47A are provided. The second convex portion 43A is a substantially rectangular parallelepiped convex portion integrally formed on the front surface 44a of the cover main body 44. A plurality of second protrusions 43 </ b> A arranged in a checkered pattern are provided so as to surround the through hole 42.

  As shown in FIG. 9B, the second cylindrical surface 47A is configured by a cylindrical surface having a circular shape in a cross section orthogonal to the terminal insertion direction. That is, the plurality of second convex portions 43A arranged in a checkered pattern are formed so as to surround the through holes 42, respectively, and the second cylindrical surfaces 47A are formed by cylindrical surfaces communicating with the through holes 42.

  Then, the plurality of first protrusions 33A provided on the rear surface 34a of the mat seal 30A and the plurality of second protrusions 43A provided on the front surface 44a of the mat seal cover 40A are fitted to each other, so that the electric wire insertion hole 31 is formed. A first cylindrical surface 37A constituted by a cylindrical surface continuously extending rearward on the inner peripheral surface and a second cylindrical surface constituted by a cylindrical surface extended forward continuously on the inner peripheral surface of the through hole 42. Due to the two cylindrical surfaces 47A, between the rear surface 34a of the mat seal 30A and the front surface 44a of the mat seal cover 40A, there is a center line X on the same line as the center line of the corresponding electric wire insertion hole 31 and through hole 42. A plurality of cylindrical openings 50 are defined.

  Therefore, the connection terminal 65 inserted from behind into the through hole 42 of the mat seal cover 40A is guided by the inner peripheral surface of the cylindrical opening 50 and enters the electric wire insertion hole 31 of the mat seal 30A, and the electric wire insertion hole 31 It can pass smoothly.

  Further, the first convex portion 33A and the second convex portion 43A, which define the plurality of cylindrical openings 50 by the first cylindrical surface 37A and the second cylindrical surface 47A, are fitted to each other to form the cylindrical opening 50. Elastic deformation in the direction intersecting with the center line X is restricted. Therefore, the center line X of the cylindrical opening 50 defined by the first cylindrical surface 37A of the first convex portion 33A and the second cylindrical surface 47A of the second convex portion 43A is already in the adjacent cylindrical opening 50. Even when the electric wire 67 is passed, the center line of the corresponding electric wire insertion hole 31 and the center line of the through hole 42 hardly deviates.

  Therefore, when it is not necessary to reduce the pitch interval between the electric wire insertion holes 31 as in the mat seal 30A according to the second embodiment, the above-described configuration provides the same configuration as the mat seal 30 according to the first embodiment. In addition, it is possible to reduce the displacement between the electric wire insertion hole 31 of the mat seal 30A and the corresponding through hole 42 of the mat seal cover 40A, and improve the terminal insertability.

  Therefore, according to the seal structure and the waterproof connector 10 provided with the seal structure according to each of the above-described embodiments, the mat seals 30 and 30A have the electric wire insertion holes 31 and the corresponding mat seal covers 40 and 40A with the through holes 42. The displacement can be reduced, and the terminal insertability can be improved.

  Note that the present invention is not limited to the above-described embodiment, and can be appropriately modified and improved. In addition, the material, shape, size, 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.

Here, the features of the above-described embodiments of the connector according to the present invention will be briefly summarized and listed in the following [1] to [3].
[1] A housing (20) having a plurality of electric wire insertion holes (31) through which an electric wire (67) to which a terminal (connection terminal 65) is connected at an end thereof and having a plurality of terminal accommodating chambers (51). A waterproof member (mat seal 30, 30A) mounted rearward to seal between the housing and the electric wires passed through the plurality of electric wire insertion holes;
A waterproof member cover (mat seal cover 40, 40A) through which the electric wire is passed, which has a through hole (42) on the same center line as the electric wire insertion hole, and which presses the waterproof member from behind to fix the waterproof member to the housing;
A seal structure comprising:
The waterproof member has a plurality of first protrusions that form a first cylindrical surface (37, 37A) extending rearward continuously to at least a part of an inner peripheral surface of the electric wire insertion hole on a rear surface (34a). Parts (33, 33A),
The waterproof member cover is fitted on the front surface (44a) with the plurality of first protrusions, and extends forward at least partially along the inner peripheral surface of the through hole. 47, 47A), and a plurality of second convex portions (43, 43A).
A seal structure characterized by the above.
[2] The seal structure according to the above [1],
The first cylindrical surface (37, 37A) and the second cylindrical surface (47, 47A) have partial cylindrical surfaces (37a, 37b; 47a, 47b). A seal structure characterized by comprising:
[3] A waterproof connector (10) comprising the seal structure according to the above [1] or [2].

10: waterproof connector 30: mat seal (waterproof member)
31 ... electric wire insertion hole 33 ... first convex portion 34a ... rear surface 37 ... first cylindrical surface 37a, 37b ... partial cylindrical surface 40 ... mat seal cover (waterproof member cover)
42 through-hole 43 second protrusion 44a front 47 second cylindrical surface 47a, 47b partial cylindrical surface 51 terminal chamber 65 connection terminal (terminal)
67… Electric wire

Claims (3)

The electric wire having a plurality of electric wire insertion holes through which electric wires having terminals connected thereto are passed, and being attached to the rear of a housing having a plurality of terminal accommodating chambers and passing through the housing and the plurality of electric wire insertion holes. A waterproof member that seals between
A waterproof member cover through which the electric wire is passed, having a through hole on the same center line as the electric wire insertion hole, and pressing the waterproof member from behind to fix the waterproof member to the housing,
A seal structure comprising:
The waterproof member includes, on a rear surface thereof, a plurality of first protrusions forming a first cylindrical surface extending rearward continuously to at least a part of an inner peripheral surface of the electric wire insertion hole,
The waterproof member cover has a front surface fitted with the plurality of first projections, and a second cylindrical surface extending forward at least continuously to at least a part of the inner peripheral surface of the through hole. And a second convex portion of
A seal structure characterized by the above. The seal structure according to claim 1, wherein
The seal structure, wherein the first cylindrical surface and the second cylindrical surface are formed by partial cylindrical surfaces having a pair of arc shapes in a cross section orthogonal to the terminal insertion direction. A waterproof connector comprising the seal structure according to claim 1.

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