Fitting structure including a seal member and a dummy plug and waterproof connector

Abstract

To provide a technique capable of exhibiting a dummy plug retaining effect with a simple configuration and capable of obtaining sufficient waterproof performance, etc., by the dummy plug.SOLUTION: A dummy plug 30 used to block a seal hole 21 provided in a seal member 20 of a waterproof connector includes a plug main body 31 that elastically deforms a lip portion 22 formed in the seal hole 21 in a state of being inserted into the seal hole 21 and is in close contact with the lip portion 22, and a fitting groove portion 34 formed in a recessed groove shape to fit the lip portion 22 on the distal end side of the plug main body 31 in the insertion direction.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a dummy plug and a waterproof connector.

Background Art

[0002] A waterproof connector is configured to ensure waterproofness by using a sealing member. When there are surplus sealing holes in the sealing member, it is common to plug the unused sealing holes with dummy plugs. As a dummy plug, one that provides a retaining function by providing a convex locking portion is generally used (see, for example, Patent Documents 1 to 3).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a dummy plug provided with a convex locking portion, a member for locking the locking portion may be required on the side of the waterproof connector. In that case, there is a risk of an increase in cost due to an increase in the size of the connector or an increase in the number of parts. Further, when the locking portion is directly locked to the sealing member, the risk of damage to the sealing member during assembly increases, which may lead to a decrease in waterproof performance or a decrease in workability due to an increase in insertion force.

[0005] An object of the present invention is to provide a technique that can exhibit a retaining effect of a dummy plug with a simple configuration and can obtain sufficient waterproof performance and the like by the dummy plug.

Means for Solving the Problems

[0006] According to one aspect of the present invention, a It is arranged in a terminal storage part provided so as to penetrate the housing, and has a seal hole and a lip part formed in the seal hole sealing member and said a dummy plug used to close a sealing hole and , including The dummy plug is in a state of being inserted into the sealing hole, said elastically deforming a lip portion said a plug main body portion that is in close contact with the lip portion, and a fitting groove portion formed in a concave groove shape that fits with the lip portion on the tip side in the insertion direction of the plug main body portion, are provided 、 The fitting groove part is formed so as to be continuous over the entire circumference in the circumferential direction of the plug main body part, The plug main body part has an axial length that is in close contact with a plurality of the lip parts formed in the seal hole, In a state where the dummy plug is inserted into the seal hole, one of the lip parts fits into the groove inner space of the fitting groove part without interfering with the fitting groove part over the entire circumference in the circumferential direction of the plug main body part Fitting structure is provided.

Effect of the Invention

[0007] According to the present invention, the effect of preventing the dummy plug from coming off can be exhibited with a simple configuration, and sufficient waterproof performance and the like can be obtained by the dummy plug.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Embodiment for Carrying Out the Invention

[0009] Hereinafter, a dummy plug and a waterproof connector according to an embodiment of the present invention will be described with reference to the drawings.

[0010] (1) Configuration Example of Waterproof Connector First, a configuration example of the waterproof connector according to this embodiment will be briefly described. FIG. 1 is a side cross-sectional view showing a configuration example of a main part of the waterproof connector according to this embodiment.

[0011] The waterproof connector includes a housing portion 10 that houses terminal fittings (not shown). The housing portion 10 is capable of fitting with another housing portion (not shown) that is the connection partner, and is configured to ensure electrical connection between the terminal fittings in each when the two housings are fitted together. Note that any housing portion may have the same configuration, and here, attention is paid to one housing portion 10 and the following description will be given.

[0012] The housing portion 10 is formed by integrally molding an insulating resin material (for example, polybutylene terephthalate: PBT), and a terminal accommodating portion 11 for accommodating terminal fittings (not shown) is formed. If the waterproof connector is compatible with multiple pins, the terminal accommodating portion 11 is formed in a number corresponding to the number of pins, for example, arranged in the depth direction in the figure.

[0013] The terminal accommodating portion 11 is provided so as to penetrate the housing portion 10, and a lance portion 12 is provided inside it. By locking the terminal fitting inserted from one end side of the terminal accommodating portion 11 and the lance portion 12, the position of the terminal fitting in the terminal accommodating portion 11 is fixed. Thereby, the terminal fitting accommodated in the terminal accommodating portion 11 can be connected to the terminal fitting of the connection partner inserted from the other end side of the terminal accommodating portion 11.

[0014] Also, a seal member 20 for ensuring waterproofness on one end side is arranged on one end side of the terminal housing portion 11. FIG. 2 is a side sectional view showing a configuration example of the seal member 20. The seal member 20 is formed of an elastic material (for example, silicone rubber), and is for sealing between the inner wall of the terminal housing portion 11 and a wire (not shown in the figure) connected to the terminal fitting housed in the terminal housing portion 11 in a state where it is mounted in the terminal housing portion 11. For this purpose, the seal member 20 is provided with a seal hole 21 which is a through hole having a circular planar shape. And by inserting the wire connected to the terminal fitting through the seal hole 21, it is configured to seal between the inner wall of the terminal housing portion 11 and the wire.

[0015] On the inner peripheral surface of the seal hole 21, a lip portion 22 having a mountain-shaped cross-sectional shape continuous in the circumferential direction is formed. A plurality of (specifically, for example, three) lip portions 22 are formed so as to be arranged along the hole axis direction of the seal hole 21. As a result, the inner peripheral surface of the seal hole 21 has an uneven surface portion in which portions with a small diameter a by the tops of the lip portions 22 and portions with a large diameter b by the bottoms of the lip portions 22 are alternately arranged. The portion with the small diameter a by the tops of the lip portions 22 is set to be smaller than the outer diameter of the wire passing through the seal hole 21. With such a diameter setting of the uneven surface portion, each lip portion 22 comes into close contact with the outer periphery of the wire in an elastically deformed state, and is a preferable configuration for sealing between the wire and ensuring waterproofness. Here, the "elastically deformed state" means a state in which elastic deformation has occurred in the elastic material constituting the lip portion 22, and as long as elastic deformation has occurred in at least the elastic material, plastic deformation may have occurred in addition to the elastic deformation.

[0016] In addition to the seal hole 21, a plurality of (specifically, for example, three) lip portions 23 may be formed on the outer peripheral side facing the inner wall of the terminal housing portion 11 of the seal member 20.

[0017] Incidentally, if the waterproof connector is compatible with multiple pins, similar to the terminal housing portion 11, there will also be a number of seal holes 21 in the seal member 20 corresponding to the number of pins. In that case, depending on the usage mode of the waterproof connector, surplus seal holes 21 may occur. Since the surplus seal holes 21 become unused seal holes 21 through which no wire is inserted, waterproofing by close contact with the wire cannot be ensured. Therefore, as shown in Fig. 1, a dummy plug 30 is inserted into the unused seal hole 21, and the unused seal hole 21 is blocked by the dummy plug 30.

[0018] (2) Configuration example of dummy plug Next, a configuration example of the dummy plug 30 according to the present embodiment will be described. Fig. 3 is an explanatory diagram showing a configuration example of the dummy plug 30 according to the present embodiment.

[0019] The dummy plug 30 is formed by integrally molding an insulating resin material (for example, polybutylene terephthalate: PBT), and includes a plug main body portion 31, a plug head portion 32, a plug tip portion 33, and a fitting groove portion 34 for blocking the unused seal hole 21.

[0020] The plug main body portion 31 is configured to elastically deform the lip portion 22 formed in the seal hole 21 and be in close contact with the lip portion 22 when inserted into the seal hole 21. For this purpose, the plug main body portion 31 is formed in a columnar shape having an outer circumference with a diameter c (specifically, a diameter equivalent to the assumed wire) larger than the diameter a of the top of the lip portion 22. Further, the plug main body portion 31 is formed in a columnar shape having an axial length d that is in close contact with all of a plurality of (specifically, for example, three) lip portions 22 formed in the seal hole 21. Thereby, the plug main body portion 31 elastically adheres to all of the plurality of lip portions 22, and thus sufficient sealing performance with the seal member 20 can be ensured.

[0021] The plug head portion 32 is formed to be continuous with the plug body portion 31 on the rear end side in the insertion direction into the seal hole 21 of the dummy plug 30 rather than the plug body portion 31, and is for preventing over-insertion into the seal hole 21 of the dummy plug 30. For this purpose, the plug head portion 32 is formed in a planar shape having a size larger than the outer diameter c of the plug body portion 31. The planar shape of the plug head portion 32 is not particularly limited, but preferably has a planar shape in which the sizes e and f in two orthogonal directions are different from each other, for example, as in the illustrated example. With such a planar shape, it becomes possible to suitably cope with the seal holes 21 arranged at a narrow pitch.

[0022] The plug tip portion 33 is formed on the edge side of the plug body portion 31 opposite to the plug head portion 32, and is the portion that becomes the tip of the dummy plug 30. The plug tip portion 33 preferably has a tapered portion that becomes smaller in diameter toward the tip in order to facilitate insertion into the seal hole 21 of the dummy plug 30.

[0023] The fitting groove portion 34 is arranged on the tip side in the insertion direction into the seal hole 21 of the dummy plug 30 rather than the plug body portion 31, and is located between the plug body portion 31 and the plug tip portion 33, and is formed in a concave groove shape that fits with the lip portion 22 in the seal hole 21 in a non-elastically deformed state. The "non-elastically deformed state" means a state in which no elastic deformation has occurred in the elastic material constituting the lip portion 22, or a state in which the amount of elastic deformation is so small that it can be regarded as not having occurred. The concave groove shape constituting the fitting groove portion 34 is formed to be continuous over the entire circumference in the circumferential direction. Further, the fitting groove portion 34 has a groove width that fits with the lip portion 22 without interfering with one lip portion 22. That is, the concave groove shape constituting the fitting groove portion 34 is formed to have a groove width h larger than the width of one lip portion 22 so as to fit with the lip portion 22 in a non-elastically deformed state. Furthermore, the fitting groove portion 34 has a groove depth larger than the protruding amount of the lip portion 22 that is the mating partner. That is, the concave groove shape constituting the fitting groove portion 34 is formed to have a diameter g smaller than the diameter a of the top of the lip portion 22 at the groove bottom so as to fit with the lip portion 22 in a non-elastically deformed state. Here, the case where the fitting groove portion 34 fits with the lip portion 22 in a non-elastically deformed state has been taken as an example, but it is not necessarily limited to this. For example, the fitting groove portion 34 may be formed to fit with the lip portion 22 in a state where elastic deformation is relaxed rather than in a non-elastically deformed state. The "state where elastic deformation is relaxed" means that the amount of elastic deformation is smaller compared to the state where the plug main body portion 31 elastically deforms the lip portion 22, and the elastic deformation is relaxed, but it has not completely become a non-elastically deformed state and elastic deformation is recognized to occur compared to the non-elastically deformed state.

[0024] The concave groove shape constituting the fitting groove portion 34 has, in addition to the groove bottom, a groove wall surface 34a on the tip side in the insertion direction into the seal hole 21 of the dummy plug 30 and a groove wall surface 34b on the rear end side in the insertion direction. And for the concave groove shape with such a configuration, in the fitting groove portion 34, the groove wall surface 34a on the tip side in the insertion direction and the groove wall surface 34b on the rear end side in the insertion direction are formed asymmetrically. More specifically, the groove wall surface 34b on the rear end side in the insertion direction has a larger inclination angle than the groove wall surface 34a on the tip side in the insertion direction. That is, while the groove wall surface 34a on the tip side in the insertion direction is formed to be substantially perpendicular to the groove bottom, the groove wall surface 34b on the rear end side in the insertion direction is inclined so as to have a larger inclination angle than the groove wall surface 34a. The dummy plug 30 provided with such a concave groove-shaped fitting groove portion 34 can achieve both the ease of insertion of the dummy plug 30 into the seal hole 21 and the difficulty of falling off from the seal hole 21, as will be described in detail later. Note that the magnitude of the inclination angle is not particularly limited and may be appropriately set.

[0025] (3) Usage mode of the dummy plug Next, the usage mode of the dummy plug 30 according to the present embodiment will be described. FIG. 4 is an explanatory diagram showing a specific example of the usage mode of the dummy plug 30.

[0026] When using the dummy plug 30, first, as shown in Fig. 4(a), for an unused seal hole 21 through which no electric wire is inserted, the dummy plug 30 is inserted into the seal hole 21 from the side of the plug tip 33 (see the arrow C in the figure). At this time, if the plug tip 33 has a tapered shape portion, the insertion of the dummy plug 30 into the seal hole 21 can be facilitated.

[0027] Then, when continuing to insert the dummy plug 30 into the seal hole 21, the fitting groove portion 34 in the dummy plug 30 passes through the formation position of the lip portion 22 in the seal hole 21. At this time, if the groove wall surface 34b on the rear end side in the insertion direction in the fitting groove portion 34 is inclined, the fitting groove portion 34 can easily pass through the formation position of the lip portion 22, and in this regard, the insertion of the dummy plug 30 into the seal hole 21 can also be facilitated.

[0028] The insertion of the dummy plug 30 into the seal hole 21 is carried out until the plug head 32 reaches a predetermined position as shown in Fig. 4(b). Examples of the predetermined position include a position where the plug head 32 engages with other members (for example, the end face of the seal member 20 or the end face of a housing not shown in the figure). When the plug head 32 reaches the predetermined position, the fitting groove portion 34 reaches a position where it penetrates through the seal hole 21. Then, the plug body portion 31 is in a state of being located within the seal hole 21. As a result, all the lip portions 22 formed within the seal hole 21 will be in an elastically deformed state and adhere closely to the outer periphery of the plug body portion 31.

[0029] In this way, in the state where the dummy plug 30 is inserted into the seal hole 21, the plug body portion 31 will elastically adhere closely to all of the plurality of lip portions 22. Therefore, the dummy plug 30 can sufficiently ensure the sealing performance with the seal member 20. That is, even for an unused seal hole 21 through which no electric wire is inserted, by inserting the dummy plug 30 into the seal hole 21, it is possible to ensure the waterproof property due to the close adhesion with the dummy plug 30.

[0030] Incidentally, when the dummy plug 30 is inserted into the seal hole 21, the dummy plug 30 is held in the seal hole 21 by utilizing the frictional force with the seal member 20 (particularly, the lip portion 22 in the seal hole 21). Therefore, when an external force greater than the frictional force is applied, as shown in Fig. 4(c), the dummy plug 30 may move in the direction of coming out of the seal hole 21 (see the arrow D in the figure).

[0031] However, even if the dummy plug 30 according to the present embodiment moves in the direction of coming out of the seal hole 21, the fitting groove portion 34 exhibits a retaining effect described below.

[0032] When the dummy plug 30 moves in the direction of coming out of the seal hole 21 and the fitting groove portion 34 reaches the formation position of the lip portion 22 in the seal hole 21, when it reaches the formation position of the first lip portion 22 among the plurality of lip portions 22, the lip portion 22 and the fitting groove portion 34 are in a fitted state. More specifically, when the fitting groove portion 34 reaches the formation position of the first lip portion 22, the lip portion 22 is opened from the outer peripheral surface of the plug main body portion 31 into the groove inner space of the fitting groove portion 34, and becomes a non-elastically deformed state or a state where elastic deformation is relaxed (hereinafter referred to as "non-elastically deformed state etc."). Then, by the non-elastically deformed state etc. of the lip portion 22 fitting into the groove inner space of the fitting groove portion 34, the lip portion 22 and the fitting groove portion 34 are in a fitted state (see the enlarged view of part E in the figure).

[0033] For the fitting of the lip portion 22 and the fitting groove portion 34, it is preferable that the fitting groove portion 34 is formed so as to be continuous over the entire circumference in the circumferential direction. This is because the lip portion 22 also becomes a non-elastically deformed state etc. over the entire circumference, and as a result, the retaining effect utilizing the non-elastically deformed state etc. of the lip portion 22 can be sufficiently exhibited. Also, for the fitting between the lip portion 22 and the fitting groove portion 34, it is preferable that the fitting groove portion 34 has a groove depth larger than the protruding amount of the lip portion 22 that is the mating partner. This makes it possible to bring the entire protruding amount of the lip portion 22 into an inelastic deformation state, and as a result, the anti-loosening effect utilizing the inelastic deformation state of the lip portion 22 can be sufficiently exhibited. Furthermore, for the fitting between the lip portion 22 and the fitting groove portion 34, it is preferable that the fitting groove portion 34 has a groove width that allows it to fit with the lip portion 22 without interfering with at least one strip of the lip portion 22. This makes it possible to bring the entire width of at least one strip of the lip portion 22 into an inelastic deformation state, and as a result, the anti-loosening effect utilizing the inelastic deformation state of the lip portion 22 can be sufficiently exhibited.

[0034] When the lip portion 22 and the fitting groove portion 34 are in a fitted state, the movement of the dummy plug 30 in the direction of coming out of the seal hole 21 is restricted thereby. That is, in order for the dummy plug 30 to continue moving further, it is necessary to apply an external force sufficient to elastically deform the lip portion 22 so as to overcome the groove wall surface 34a on the tip side in the insertion direction in the fitting groove portion 34. Therefore, when the lip portion 22 and the fitting groove portion 34 are in a fitted state, the anti-loosening effect on the dummy plug 30 is exhibited.

[0035] At this time, the first lip portion 22 among the plurality of strips fits with the fitting groove portion 34, but the remaining (for example, the other two) lip portions 22 among the plurality of strips maintain a state of remaining in close contact with the outer periphery of the plug main body portion 31 in an elastically deformed state. Therefore, while the anti-loosening effect by the fitting groove portion 34 is exhibited, the sealing property by the other lip portions 22 remains maintained, so that sufficient waterproofness can be ensured.

[0036] In this way, the fitting groove portion 34 exerts a retaining effect by utilizing the fitting of the lip portion 22 in a non-elastic deformed state or the like. Therefore, in the fitting groove portion 34, it is preferable that the groove wall surface 34a on the tip side in the insertion direction is formed so as to be substantially perpendicular to the groove bottom without having an inclination angle like the groove wall surface 34b on the rear end side in the insertion direction. This is because if it is not inclined, it becomes difficult for the lip portion 22 to overcome the groove wall surface 34a.

[0037] On the other hand, as described above, it is preferable that the groove wall surface 34b of the fitting groove portion 34 has an inclination angle for facilitating the insertion of the dummy plug 30. That is, in the fitting groove portion 34, the groove wall surface 34a on the tip side in the insertion direction and the groove wall surface 34b on the rear end side in the insertion direction are formed asymmetrically. If the groove wall surface 34b has a larger inclination angle than the groove wall surface 34a, it is possible to achieve both the facilitation of the insertion of the dummy plug 30 into the seal hole 21 and the exertion of a good retaining effect on the dummy plug 30 inserted into the seal hole 21.

[0038] (4) Effects obtained by this embodiment According to this embodiment, one or more of the following effects can be obtained.

[0039] (a) In this embodiment, the dummy plug 30 for closing the seal hole 21 is formed with a fitting groove portion 34 in a concave groove shape that fits with a lip portion 22 in a non-elastic deformed state or the like on the tip side in the insertion direction of the plug main body portion 31, and is configured to exert a retaining effect by utilizing the fitting between the fitting groove portion 34 and the lip portion 22. Thereby, for retaining the dummy plug 30, there is no need to provide, for example, a convex locking portion on the dummy plug 30, and the retaining effect of the dummy plug 30 can be exerted with a very simple configuration. Therefore, according to this embodiment, it is possible to suppress an increase in cost due to an increase in the size of the connector or an increase in the number of parts. Also, for example, a convex locking portion does not damage the seal member 20, so the risk of damage to the seal member 20 during assembly can be kept low, and there is no possibility of causing a decrease in waterproof performance or a decrease in workability due to an increase in insertion force. Moreover, according to the present embodiment, even with a simple configuration, sufficient waterproofing can be ensured by the elastic close contact of the lip portion 22 with the plug main body portion 31. That is, according to the present embodiment, the retaining effect of the dummy plug 30 can be exerted with a very simple configuration, and moreover, sufficient waterproof performance and the like by the dummy plug 30 can be obtained.

[0040] (b) If the fitting groove portion 34 is formed so as to be continuous over the entire circumference in the circumferential direction as in the present embodiment, the retaining effect utilizing the inelastic deformation state of the lip portion 22 and the like can be sufficiently exerted. That is, it is very preferable in terms of exerting the retaining effect of the dummy plug 30 with a simple configuration.

[0041] (c) If the plug main body portion 31 has an axial length in close contact with a plurality of lip portions 22 and the fitting groove portion 34 has a groove width that fits with the lip portion 22 without interfering with one lip portion 22 as in the present embodiment, sufficient waterproofing can be ensured while sufficiently exerting the retaining effect utilizing the inelastic deformation state of the lip portion 22. That is, it is very preferable in terms of being able to exert the retaining effect of the dummy plug 30 with a simple configuration and obtaining sufficient waterproof performance and the like by the dummy plug 30.

[0042] (d) If the fitting groove portion 34 has a groove depth larger than the protruding amount of the lip portion 22 that is the fitting partner as in the present embodiment, the retaining effect utilizing the inelastic deformation state of the lip portion 22 can be sufficiently exerted. That is, it is very preferable in terms of exerting the retaining effect of the dummy plug 30 with a simple configuration.

[0043] (e) As in this embodiment, in the fitting groove portion 34, if the groove wall surface 34a on the tip side in the insertion direction and the groove wall surface 34b on the rear end side in the insertion direction are formed asymmetrically, and the groove wall surface 34b has a larger inclination angle than the groove wall surface 34a, it becomes possible to achieve both easier insertion of the dummy plug 30 into the seal hole 21 and the exhibition of a good retaining effect against the dummy plug 30 inserted into the seal hole 21. Therefore, it is very preferable in terms of being able to exhibit the retaining effect of the dummy plug 30 with a simple configuration and obtaining sufficient waterproof performance and the like by the dummy plug 30.

[0044] (f) As in this embodiment, if the sizes e and f in two orthogonal directions of the plug head portion 32 are in a planar shape different from each other, it becomes possible to suitably correspond to the seal holes 21 arranged in a narrow pitch. That is, for example, when a plurality of unused seal holes 21 are arranged in a narrow pitch, by arranging the plug head portions 32 along the direction of the smaller size f, the plug head portions 32 of the dummy plugs 30 inserted into the respective seal holes 21 do not interfere with each other, and each dummy plug 30 can be inserted into the seal hole 21. Moreover, even in that case, since the plug head portion 32 extends in the direction of the larger size e, the planar area of the plug head portion 32 can be sufficiently secured, which is preferable in terms of obtaining sufficient waterproof performance and the like by the dummy plug 30.

[0045] (5) Modifications and the like The embodiments of the present invention have been specifically described above. However, the present invention is not limited to the above-described embodiments and can be appropriately changed without departing from the gist thereof.

[0046] In the above-described embodiment, the dummy plug 30 has been mainly described. However, the present invention is not limited thereto, and it is also possible to configure a waterproof connector including the dummy plug 30. Specifically, the waterproof connector may be configured by inserting the dummy plug 30 into the seal hole 21 of the seal member 20 attached to the housing portion 10 of the waterproof connector. A waterproof connector having such a configuration is suitable for multi-pin applications. For example, even when surplus seal holes 21 occur depending on the usage mode, sufficient waterproof performance and the like can be obtained by using the dummy plug 30 for the seal holes 21. Moreover, for this purpose, the configuration related to the dummy plug 30 does not become complicated.

Explanation of Reference Numerals

[0047] 10... Housing portion, 11... Terminal accommodation portion, 12... Lance portion, 20... Seal member, 21... Seal hole, 22... Lip portion, 30... Dummy plug, 31... Plug main body portion, 32... Plug head portion, 33... Plug tip portion, 34... Fitting groove portion, 34a... Groove wall surface, 34b... Groove wall surface

Claims

1. A seal member disposed within a terminal housing portion provided to penetrate through a housing of a waterproof connector, the seal member having a seal hole and a lip portion formed within the seal hole; and A dummy plug used to close the seal hole, wherein the dummy plug has a plug body portion that elastically deforms the lip portion and is in close contact with the lip portion in a state of being inserted into the seal hole; and a fitting groove portion formed in a concave groove shape that fits with the lip portion on the tip side in the insertion direction of the plug body portion, wherein the fitting groove portion is formed to be continuous over the entire circumference in the circumferential direction of the plug body portion, the plug body portion has an axial length that is in close contact with a plurality of the lip portions formed within the seal hole, and in a state where the dummy plug is inserted into the seal hole, one of the lip portions fits into the groove inner space of the fitting groove portion without interfering with the fitting groove portion over the entire circumference in the circumferential direction of the plug body portion fitting structure.

2. The fitting groove portion has a groove depth that is greater than the protruding amount of the lip portion that is the mating partner The fitting structure according to claim 1.

3. The fitting groove portion is formed asymmetrically such that the groove wall surface on the tip side in the insertion direction and the groove wall surface on the rear end side in the insertion direction are different, and the groove wall surface on the rear end side in the insertion direction has a larger inclination angle than the groove wall surface on the tip side in the insertion direction The fitting structure according to claim 1 or 2.

4. The plug body portion is provided with a plug head portion formed to be continuous with the plug body portion on the rear end side in the insertion direction, and the plug head portion has a planar shape in which the sizes in two orthogonal directions are different from each other The fitting structure according to any one of claims 1 to 3.

5. A waterproof connector including the fitting structure according to any one of claims 1 to 4.

Images