JP5433776B1 - Waterproof connector - Google Patents

Abstract

A waterproof connector capable of improving the waterproof property between a housing and a shell is provided.
A shell (30) covers a periphery of a contact portion (21) of a contact (20) and is exposed from a housing (10) to be fitted with a mating connector, and a board attachment (exposed from the housing (10) and attached to a board). A housing holding part 33 that connects between the fitting part 31 and the board mounting part 32 and is embedded in the housing 10. The housing holding part 33 and the housing 10 are provided on the surface of the housing holding part 33. A shell groove 34 for blocking water intrusion along the interface is formed.
[Selection] Figure 8

Description

  The present invention relates to a waterproof connector, and more particularly to a waterproof connector in which a shell is formed integrally with a housing made of an insulating resin.

In recent years, electronic devices such as computers and mobile phones have been widely used, but these electronic devices are usually provided with connectors for transmitting signals by connecting to external devices. As this type of connector, in order to prevent an electric signal to be transmitted from being affected by an external electromagnetic wave, a connector with a shield against the electromagnetic wave is desired.
Further, in electronic devices, there is a high demand for a waterproof function, and accordingly, development of a waterproof connector having waterproofness is in progress.
Such a connector having both a shield against electromagnetic waves and a waterproof property is disclosed in Patent Document 1, for example. In this connector, as shown in FIG. 27, a contact 2 for conductive connection is arranged inside a cylindrical metal shell 1, and the shell 1 and the contact 2 are made of an insulating resin by insert molding or the like. The housing 3 is integrally molded.

A ground terminal 4 exposed from the housing 3 is formed at the rear end portion of the shell 1. By connecting the ground terminal 4 to a ground pattern or the like of a board on which the connector is mounted, the shell 1 becomes a ground potential. As a result, the contact 2 is shielded.
Further, since the shell 1 is integrally molded in the housing 3, the surface of the shell 1 is in close contact with the insulating resin forming the housing 3, and is grounded from the outside of the connector through the boundary between the housing 3 and the shell 1. Water is prevented from entering the terminal 4 side, that is, the board side on which the connector is mounted.

JP 2012-59540 A

  However, in general, the metal material forming the shell 1 and the resin material forming the housing 3 have different coefficients of thermal expansion. For example, soldering work when mounting the connector on the circuit board of the electronic device, for example, When the connector is exposed to a high temperature environment by reflow mounting, the expansion amount of the shell 1 and the expansion amount of the housing 3 are different, and the insulating resin that is in close contact with the surface of the shell 1 may be peeled off from the surface of the shell 1. is there. Once peeling occurs, a gap is formed between the surface of the shell 1 and the housing 3, and even if the temperature drops to room temperature, there is a risk that water may enter the ground terminal 4 side through this gap. .

  In addition, when the mating connector is fitted to the connector, so-called malicious fitting is performed such that the fitting shaft is forcedly engaged from an oblique direction with respect to the fitting shaft, and a large stress is generated between the housing 3 and the shell 1. May act. Also in this case, the insulating resin of the housing 3 may be peeled off from the surface of the shell 1 and the waterproofness of the connector may be impaired.

  The present invention has been made to solve such a conventional problem, and an object thereof is to provide a waterproof connector capable of improving the waterproof property between the housing and the shell.

  The waterproof connector according to the present invention is a waterproof connector in which one or more contacts and a shell are integrally formed in a housing made of an insulating resin. The shell is exposed from the housing and is fitted to a mating connector. On the surface of the housing holding part, and a board holding part that is exposed from the housing and attached to the board, and a housing holding part that connects between the fitting part and the board mounting part and is embedded in the housing. In addition, a shell waterproof shape portion for blocking water intrusion along the interface between the housing holding portion and the housing is formed.

The shell waterproof shape part can be formed from a shell groove or a shell projection formed so as to separate the surface of the housing holding part into the fitting part side and the board attaching part side.
In this case, the shell waterproof shape portion is preferably formed so as to be closed around the housing holding portion.
The shell waterproof shape part preferably has a height difference of 0.01 mm or more.
Furthermore, the shell waterproof shape portion can be formed from a plurality of shell grooves or a plurality of shell protrusions.
It is preferable that the shell groove or the shell projection has a cross-sectional shape of any one of a triangular shape, an arc shape, a quadrangular shape, and an inverted triangular shape.

Note that the housing holding portion may include a shell constriction portion that is formed narrower than the fitting portion, and the shell waterproof shape portion may be formed on the surface of the shell constriction portion.
Alternatively, the housing holding portion may have a hollow shape, and the shell waterproof shape portion may be formed on the outer peripheral surface and the inner peripheral surface of the housing holding portion, respectively.

A contact is exposed from the housing and covered by the fitting portion of the shell, a substrate connecting portion exposed from the housing and connected to the substrate, and a connection between the contact portion and the substrate connecting portion. It is also possible to form a contact waterproof shape portion for blocking water intrusion along the interface between the fixed portion and the housing on the surface of the fixed portion.
The waterproof contact portion can be formed from contact grooves or contact protrusions formed so as to separate the surface of the fixed portion into the contact portion side and the substrate connection portion side.
In this case, preferably, the contact waterproof shape portion is formed so as to be closed around the periphery of the fixed portion.
The contact waterproof shape part preferably has a height difference of 0.01 mm or more.
Furthermore, the waterproof contact portion can be formed from a plurality of contact grooves or a plurality of contact protrusions.
The contact groove or the contact protrusion preferably has a cross-sectional shape of any one of a triangular shape, an arc shape, a quadrangular shape, and an inverted triangular shape.
Note that the fixing portion may include a contact constriction portion formed narrower than the contact portion and the substrate connection portion, and the contact waterproof shape portion may be formed on the surface of the contact constriction portion.

  According to the present invention, the shell waterproof shape portion for blocking water intrusion along the interface between the housing holding portion and the housing is formed on the surface of the housing holding portion of the shell embedded in the housing. It becomes possible to improve the waterproofness between the housing and the shell.

1 shows a waterproof connector according to Embodiment 1 of the present invention, in which (A) is a perspective view obliquely upward and viewed from the front, (B) is a perspective view obliquely upward and from the rear, and (C) is diagonally downward and forward. The perspective view seen from (D) is the perspective view seen from diagonally downward and back. The shell used for the waterproof connector of Embodiment 1 is shown, (A) is the perspective view seen from diagonally upward and the front, (B) is the perspective view seen diagonally upward and from the back, (C) is diagonally downward and The perspective view seen from the front, (D) is the perspective view seen from diagonally downward and the back. The shell used for the waterproof connector of Embodiment 1 is shown, (A) is a front view, (B) is a rear view, (C) is a plan view, (D) is a bottom view, and (E) is a side view. is there. 3 is a perspective view showing a shell waterproof shape portion of a shell used in the waterproof connector according to Embodiment 1. FIG. 3 is a development view of a shell used in the waterproof connector according to Embodiment 1. FIG. 3 is a perspective view showing a contact used in the waterproof connector according to Embodiment 1. FIG. 3 is a perspective view showing a contact fixing portion used in the waterproof connector according to Embodiment 1. FIG. 1 is an exploded perspective view of a waterproof connector according to Embodiment 1. FIG. It is a perspective view which shows the state which cut | disconnected the waterproof connector which concerns on Embodiment 1 with the height of the shell waterproofing shape part. It is a principal part enlarged view of FIG. It is a perspective view which shows the state which cut | disconnected the waterproof connector which concerns on Embodiment 1 in the position of a contact. It is a principal part enlarged view of FIG. It is side surface sectional drawing which shows the waterproof connector of Embodiment 1 attached to the housing | casing. The waterproof connector of Embodiment 1 aligned with the board | substrate is shown, (A) is the perspective view seen from diagonally upward and the front, (B) is the perspective view seen diagonally downward and the back. It is a perspective view which shows the waterproof connector of Embodiment 1 mounted in the board | substrate. The waterproof connector of Embodiment 1 attached to the housing | casing is shown, (A) is the perspective view seen from diagonally forward, (B) is the perspective view seen from diagonally back. 6 is a plan view showing a shell used in the waterproof connector according to Embodiment 2. FIG. 6 is an exploded perspective view of a waterproof connector according to Embodiment 3. FIG. 6 is a perspective view showing a shell used in a waterproof connector according to Embodiment 3. FIG. It is a perspective view which shows the state which cut | disconnected the waterproof connector which concerns on Embodiment 3 in the position of the board | substrate attachment part of a shell. It is a principal part enlarged view of FIG. It is a perspective view which shows the state which cut | disconnected the waterproof connector which concerns on Embodiment 3 in the position of a contact. It is a principal part enlarged view of FIG. It is a fragmentary sectional view which shows the various shell grooves of the shell used for the waterproof connector which concerns on Embodiment 4. FIG. 10 is a partial cross-sectional view showing various shell protrusions of a shell used in a waterproof connector according to a modification of the fourth embodiment. FIG. 10 is a partial plan view showing a main part of a contact used in a waterproof connector according to a fifth embodiment. It is side surface sectional drawing which shows the structure of the conventional waterproof connector.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
Embodiment 1
FIG. 1 shows a configuration of a waterproof connector according to Embodiment 1 of the present invention. The waterproof connector includes a housing 10 having a substantially rectangular parallelepiped outer shape, a plurality of contacts 20 fixed to the housing 10, and a shell 30 fixed to the housing 10 and shielding the plurality of contacts 20. The housing 10 is made of an insulating resin, and the contacts 20 and the shell 30 are made of a conductive metal material.

The shell 30 has a hollow fitting portion 31 that opens to the front surface 10 a side of the housing 10, and a space S for fitting with the mating connector is formed inside the fitting portion 31. A contact portion 21 disposed at the front end of each contact 20 is disposed in the space S of the fitting portion 31 of the shell 30. On the other hand, the board connecting portions 22 arranged at the rear ends of the respective contacts 20 are exposed to the outside of the housing 10 from the rear surface 10 b of the housing 10.
The shell 30 has a pair of board mounting portions 32, and these board mounting portions 32 are exposed from the lower surface 10 c of the housing 10 to the outside of the housing 10.

  2 and 3, the fitting portion 31 of the shell 30 has a central axis C1 and a cylindrical shape with a flat cross-sectional shape elongated in a direction perpendicular to the central axis C1. Here, for convenience, the direction extending parallel to the central axis C1 from the front to the rear of the fitting portion 31 is the X direction, the surface from which the upper surface 31a of the flat fitting portion 31 extends is the XY surface, and the upper surface of the fitting portion 31 A direction perpendicular to 31a and directed downward is referred to as a Z direction.

The shell 30 has a housing holding portion 33 that connects between the fitting portion 31 and the pair of substrate mounting portions 32. The housing holding portion 33 is flat from the center of the upper rear end of the fitting portion 31 to the rear protruding portion 33a protruding in the X direction along the central axis C1 of the fitting portion 31, and from the rear end of the rear protruding portion 33a. A pair of arm portions 33b extending in both directions parallel to the upper surface 31a of the fitting portion 31 and perpendicular to the central axis C1, that is, the Y direction and the -Y direction, respectively, and downward from the tips of both arm portions 33b, that is, the Z direction. A pair of leg portions 33c extending to the center is included. And the board | substrate attaching part 32 is connected to the lower end of a pair of leg part 33c, respectively. The pair of board mounting portions 32 are formed to extend from the rear to the front of the fitting portion 31, that is, on the XY plane and in the −X direction.
The rear projecting portion 33a, the pair of arm portions 33b, and the pair of leg portions 33c of the housing holding portion 33 all form a shell narrowed portion that is thinner than the fitting portion 31, and a housing having such a shell narrowed portion. The holding portion 33 is embedded in the housing 10 when the shell 30 is molded into the housing 10.

  Further, as shown in FIG. 4, a plurality of shell grooves 34 parallel to each other are formed on the outer peripheral surfaces of the pair of arm portions 33b. Each shell groove 34 is formed so as to surround and surround the periphery of the arm portion 33 b, and the surface of the housing holding portion 33 causes the fitting portion 31 side portion and the board attachment portion 32 to be closed by each shell groove 34. Separated into side parts. These shell grooves 34 form a shell waterproof shape portion for blocking water intrusion along the interface between the housing holding portion 33 and the housing 10 when the shell 30 is molded into the housing 10. is there.

The shell 30 having such a configuration can be manufactured by cutting a conductive metal plate 35 into a shape as shown in FIG. 5 and then bending it with a press or the like. The band-shaped portion 35a is formed into a flat cylindrical shape to form the fitting portion 31, the rear protruding portion 33a protrudes from the central outer edge of the band-shaped portion 35a, and a pair of arm portions 33b are connected to the tips of the rear protruding portion 33a. The pair of leg portions 33c are connected to the tips of the pair of arm portions 33b, and the substrate attachment portion 32 is formed by the flat plate portions 35b connected to the tips of the pair of legs 33c.
As is apparent from the developed view of FIG. 5, arms 33 b each having a shell groove 34 in the middle of a path from the band-shaped portion 35 a forming the fitting portion 31 to the pair of flat plate portions 35 b forming the substrate mounting portion 32. Is present.

  FIG. 6 shows the configuration of the contact 20. The contact 20 is formed of a rod-shaped member or a flat plate member, and a fixing portion 23 is formed between the contact portion 21 and the substrate connecting portion 22. The fixing portion 23 is a portion that is embedded in the housing 10 and fixed to the housing 10 when being molded into the housing 10 together with the shell 30. As shown in FIG. 7, a plurality of contact grooves 24 parallel to each other are formed on the outer peripheral surface of the fixed portion 23. Each contact groove 24 is formed so as to surround and surround the periphery of the fixing portion 23, and the contact groove 24 allows the surface of the contact 20 to be in contact with the contact portion 21 side portion and the substrate connection portion 22 side portion. Have been separated. These contact grooves 24 form a contact waterproof shape portion for blocking water intrusion along the interface between the fixed portion 23 and the housing 10 when the contact 20 is molded into the housing 10. .

FIG. 8 shows an exploded view of the waterproof connector. The inner surface of the fitting portion 31 of the shell 30 is exposed to the front end side of the housing 10, the housing holding portion 33 in which the shell groove 34 is formed is embedded in the housing 10, and the board mounting portion 32 is exposed from the lower surface 10 c of the housing 10. The contact portions 21 of the plurality of contacts 20 are exposed in the fitting portion 31 of the shell 30, the fixing portion 23 is embedded in the housing 10, and the board connecting portion 22 is exposed from the rear surface 10b of the housing 10. The housing 10 is molded integrally with the shell 30 and the plurality of contacts 20.
At this time, the plurality of contacts 20 and the shell 30 are set in a mold (not shown) so that the contact portion 21 of the contact 20 is located in the fitting portion 31 of the shell 30, and the mold is closed and melted in the mold. After injecting the insulating resin material, the housing 10 and the plurality of contacts 20 and the shell 30 are integrally formed by cooling, and the waterproof connector as shown in FIG. 1 can be manufactured.

  FIG. 9 shows a state in which the waterproof connector according to the first embodiment is cut along the XY plane at the height of the pair of arm portions 33b of the shell 30. A housing holding portion 33 of the shell 30 is embedded in the housing 10, and a pair of arm portions 33 b is connected from the fitting portion 31 via the rearward protruding portion 33 a. Further, the inner surface of the fitting portion 31 is exposed without being covered by the housing 10. Since a plurality of shell grooves 34 are formed in the arm portion 33b so as to surround and surround the periphery of the arm portion 33b, as shown in FIG. 10, there are shells on both side edges of the cut surface of the arm portion 33b. The cross-sectional shape of the groove 34 appears.

  Moreover, the state which cut | disconnected the waterproof connector along the XZ surface in the position of the contact 20 is shown in FIG. The contact portion 21 of the contact 20 is exposed in the fitting portion 31 of the shell 30, the substrate connecting portion 22 is exposed to protrude rearward from the rear surface 10 b of the housing 10, and the fixing portion 23 is embedded in the housing 10. A cut surface of the arm portion 33 b of the shell 30 is shown above the fixing portion 23 of the contact 20. Since a plurality of contact grooves 24 are formed in the fixing portion 23 of the contact 20 so as to surround and close the periphery of the fixing portion 23, as shown in FIG. 12, on both side edges of the cut surface of the fixing portion 23. Shows the cross-sectional shape of the contact groove 24.

  By integrally molding the housing 10 with the shell 30 and the contact 20, the insulating resin constituting the housing 10 is brought into close contact with the surface of the housing holding portion 33 of the shell 30 and the fixing portion 23 of the contact 20 embedded in the housing 10.

As described above, the housing holding portion 33 of the shell 30 embedded in the housing 10 has a plurality of arms 33b so as to surround and close the periphery of the arm portion 33b existing on the way from the fitting portion 31 to the board mounting portion 32. Shell grooves 34 are formed. For this reason, due to the difference in thermal expansion coefficient between the insulating resin material constituting the housing 10 and the metal material forming the shell 30, or in an oblique direction with respect to the fitting axis when mated with the mating connector For example, the so-called spurious fitting is performed such that the insulating resin of the housing 10 that is in close contact with the surface of the housing holding portion 33 of the shell 30 is peeled off from the housing holding portion 33 and fitted. Even if water intrudes from the portion 31 along the interface between the housing holding portion 33 and the housing 10, the water that has entered the arm portion 33b of the housing holding portion 33 is blocked by the plurality of shell grooves 34, It is possible to prevent the bottom surface 10c of the housing 10 from reaching the substrate mounting portion 32 exposed.
In particular, since the arm portion 33b in which the plurality of shell grooves 34 are formed constitutes a shell constriction portion that is thinner than the fitting portion 31, the amount of water that enters is limited by the narrowing of the water intrusion path. The shell groove 34 can effectively exhibit a waterproof function.

Similarly, a plurality of contact grooves 24 are formed in the fixing portion 23 of the contact 20 embedded in the housing 10 so as to surround and close the periphery of the fixing portion 23. The insulating resin of the housing 10 that is in close contact with the surface peels off from the fixing portion 23, and the contact portion 21 exposed in the fitting portion 31 of the shell 30 causes water along the interface between the fixing portion 23 and the housing 10. Even if the water enters, the water that has entered the water is blocked by the plurality of contact grooves 24 and is prevented from reaching the substrate connecting portion 22 exposed from the rear surface 10b of the housing 10.
In this way, it is possible to improve the waterproofness between the housing 10 and the shell 30 and the contacts 20 and prevent water from entering the inside of the apparatus, that is, the substrate side on which the waterproof connector is mounted.

As shown in FIG. 13, for example, the waterproof connector according to the first embodiment is mounted and used on a substrate 41 mounted in a housing 40 of an electronic device such as a mobile phone. An opening 42 corresponding to the fitting portion 31 of the shell 30 is formed in the housing 40, and a gap between the inner surface of the housing 40 and the front surface 10 a of the housing 10 at the periphery of the opening 42 is sealed with a gasket 43. The
With this configuration, moisture outside the housing 40 is caused by the plurality of shell grooves 34 of the housing holding portion 33 of the shell 30 embedded in the housing 10 and the plurality of contact grooves 24 of the fixing portion 23 of the contact 20. Intrusion into the housing 40 from the fitting portion 31 of the shell 30 is prevented, and entry into the housing 40 from between the housing 40 and the housing 10 is prevented by the gasket 43, so that the waterproof function Can be fulfilled.

  When mounting the waterproof connector in the housing 40, first, as shown in FIG. 14, the board mounting portion 32 of the shell 30 exposed from the lower surface 10c of the housing 10 is connected to the ground pattern 44 on the board 41. And the board connecting portions 22 of the plurality of contacts 20 exposed from the rear surface 10 b of the housing 10 are aligned with the wiring pattern 45 on the board 41. Next, by soldering the substrate attachment portion 32 of the shell 30 to the ground pattern 44 on the substrate 41 and soldering the substrate connection portions 22 of the plurality of contacts 20 to the wiring pattern 45 on the substrate 41, FIG. As shown, the waterproof connector is fixed on the substrate 41. Thereafter, as shown in FIG. 16, the substrate 41 is fixed in the housing 40, the inner surface of the fitting portion 31 of the shell 30 is exposed through the opening 42 of the substrate 41, and the inner surface of the housing 40 and the housing 10 are exposed. What is necessary is just to make it the state into which the gasket 43 was pushed in between the front surfaces 10a.

In order to block water intrusion along the interface between the housing holding portion 33 of the shell 30 and the housing 10 and water intrusion along the interface between the fixing portion 23 of the contact 20 and the housing 10, The shell groove 34 formed in the portion 33b and the contact groove 24 formed in the fixing portion 23 of the contact 20 desirably have a height difference, that is, a depth of 0.01 mm or more, for example.
In addition, even if one shell groove 34 is formed instead of forming a plurality of shell grooves 34 in the arm portion 33b of the shell 30, water intrusion along the interface with the housing 10 can be suppressed. A higher waterproof function can be exhibited by forming the plurality of shell grooves 34. Similarly, even if one contact groove 24 is formed instead of forming the plurality of contact grooves 24 in the fixing portion 23 of the contact 20, water intrusion along the interface with the housing 10 can be suppressed. A better waterproof effect can be obtained by forming the plurality of contact grooves 24.

The shell 30 has a pair of substrate mounting portions 32 exposed from the lower surface 10 c of the housing 10. However, the shell 30 may have only one substrate mounting portion 32 or three or more substrate mounting portions 32. In the case where there is one substrate mounting portion 32, one arm portion 33b is formed in the middle of the path from the fitting portion 31 to the substrate mounting portion 32, and the shell groove 34 is formed on the surface of the arm portion 33b. . Further, when the shell 30 has three or more substrate mounting portions 32, the shell 30 may be arranged so that any shell groove 34 exists in the middle of the path from the fitting portion 31 to each of the substrate mounting portions 32. The number of the arm portions 33b in which the shell grooves 34 are formed may be the same as the number of the board mounting portions 32 or may be smaller than the number of the board mounting portions 32.
The fitting portion 31 of the shell 30 has a flat cylindrical shape that covers the entire circumference of the contact portions 21 of the plurality of contacts 20, but is not limited thereto, and the contacts of the plurality of contacts 20 are not limited thereto. Even if only a part of the portion 21 is covered, a shielding effect can be achieved depending on the usage of the waterproof connector. Furthermore, when the shell is used as a member for attaching the waterproof connector to the substrate 41 via the substrate attachment portion 32 without having to obtain a shielding effect, the shell covers the contact portions 21 of the plurality of contacts 20. It does not have to be.

Embodiment 2
In the shell 30 used in the first embodiment, the plurality of shell grooves 34 are formed in the arm portion 33 b of the housing holding portion 33, but are not limited to the arm portion 33 b and are embedded in the housing 10. Therefore, it may be formed in the narrowed portion of the housing holding portion 33 arranged in the middle of the path from the fitting portion 31 to the board mounting portion 32.

  For example, like the shell 50 shown in FIG. 17, a plurality of shell grooves 54 can be formed on the surface of the rear protrusion 53 a that protrudes rearward from the rear end of the fitting portion 51. The shell 50 has the same configuration as that of the shell 30 used in the first embodiment except that a plurality of shell grooves 54 are formed in the rearward protruding portion 53a. That is, the housing holding part 53 is disposed between the fitting part 51 and the pair of board mounting parts 52, and the housing holding part 53 is connected to the rear projecting part 53a and the rear end of the rear projecting part 53a. The board | substrate attachment part 52 corresponding to the front-end | tip of each leg part 53c is connected including the part 53b and a pair of leg part 53c connected to the front-end | tip of both the arm parts 53b.

In order to reach both the board mounting portions 52 from the fitting portion 51 along the surface of the shell 50, it is necessary to pass through the rear protrusion 53a, and a plurality of shell grooves 54 are formed on the outer peripheral surface of the rear protrusion 53a. As a result, it is possible to block water intrusion along the interface between the housing holding portion 53 and the housing 10.
Similarly, a plurality of shell grooves 54 may be formed on the surfaces of the pair of leg portions 53c instead of the rear projecting portion 53a. Even if it does in this way, the same waterproof effect will be acquired.

Embodiment 3
In the shells 30 and 50 used in the first and second embodiments, the plurality of shell grooves 34 and 54 are formed in the leg portion 33c and the rearward protruding portion 53a, which are narrow portions, respectively. It is not necessary to form in a part.
FIG. 18 shows an exploded view of the waterproof connector according to the third embodiment. This waterproof connector uses a shell 60 that does not have a narrowed portion instead of the shell 30 in the waterproof connector of the first embodiment.

As shown in FIG. 19, the shell 60 has a hollow flat cylindrical fitting portion 61 and a hollow flat cylindrical housing holding portion 63 connected to the rear end side of the fitting portion 61. A pair of board mounting portions 62 are formed to protrude from the rear end of the housing holding portion 63. That is, one cylindrical body is divided into a front end portion and a rear end portion, and the front end portion is used as a fitting portion 61 and the rear end portion is used as a housing holding portion 63.
The fitting portion 61 covers the periphery of the contact portion 21 disposed at the front ends of the plurality of contacts 20, and the inner surface portion is exposed from the housing 10. The housing holding portion 63 has the inner surface portion and the outer surface portion all within the housing 10. Embedded in.

A plurality of shell grooves 64 parallel to each other are formed on the outer peripheral surface of the housing holding portion 63, and a plurality of shell grooves 65 parallel to each other are also formed on the inner peripheral surface of the housing holding portion 63. Each shell groove 64 is formed so as to surround and close the outer periphery of the housing holding portion 63, and each shell groove 65 is formed so as to surround and close the inner periphery of the housing holding portion 63.
In order to reach both the board mounting portions 62 from the fitting portion 61 along the surface of the shell 60, it is necessary to cross the shell groove 64 or the shell groove 65. The shell grooves 64 and 65 allow the housing holding portion 63 and Water intrusion along the interface with the housing 10 can be blocked.

  A state in which the waterproof connector according to the third embodiment is cut along the XZ plane at the position of the board mounting portion 62 of the shell 60 is shown in FIG. The inner surface of the fitting portion 61 of the shell 60 is exposed without being covered by the housing 10, the housing holding portion 63 is embedded in the housing 10, and the board mounting portion 62 connected to the rear end of the housing holding portion 63 is the housing 10. It protrudes from the rear surface 10b and is exposed. Since the shell grooves 64 and 65 are formed on the outer peripheral surface and the inner peripheral surface of the housing holding portion 63, respectively, the shell grooves 64 and 65 are formed on both side edges of the cut surface of the housing holding portion 63 as shown in FIG. 65 cross-sectional shapes appear.

Moreover, the state which cut | disconnected the waterproof connector along the XZ surface in the position of the contact 20 is shown in FIG. The contact portion 21 of the contact 20 is exposed in the fitting portion 61 of the shell 60, the substrate connecting portion 22 is exposed to protrude rearward from the rear surface 10 b of the housing 10, and the fixing portion 23 is embedded in the housing 10. Since a plurality of contact grooves 24 are formed in the fixing portion 23 of the contact 20 so as to surround and surround the periphery of the fixing portion 23, as shown in FIG. 23, on both side edges of the cut surface of the fixing portion 23. Shows the cross-sectional shape of the contact groove 24.
Thus, even if the shell 60 having the hollow housing holding portion 63 is used, an excellent waterproof effect can be obtained between the housing 10 and the shell 60 and the contact 20.

Embodiment 4
The cross-sectional shapes of the shell grooves 34, 54, 64, and 65 used in the first to third embodiments are not particularly limited. For example, a triangular shape as shown in FIG. 24 (A), an arc shape as shown in FIG. 24 (B), a square shape as shown in FIG. 24 (C), and as shown in FIG. 24 (D). An excellent waterproof function can be exhibited even in a reverse triangular shape or a reverse tapered shape.
Similarly, the contact groove 24 formed in the fixing portion 23 of the contact 20 can be formed to have various cross-sectional shapes as shown in FIGS.

Further, as the shell waterproof shape portion formed on the surface of the housing holding portion of the shell, a shell protrusion protruding from the surface of the housing holding portion can be used instead of the shell groove. If the surface of the housing holding part is separated into the fitting part side and the board mounting part side by the shell protrusion, water intrusion along the interface between the housing holding part and the housing is blocked in the same manner as the shell groove. It becomes possible.
Examples of the shell protrusion include a triangular shape as shown in FIG. 25A, an arc shape as shown in FIG. 25B, a quadrangular shape as shown in FIG. 25C, and FIG. ) Having a cross section of an inverted triangle shape or an inverse tapered shape as shown in FIG.

  Similarly, as the contact waterproof shape portion formed on the surface of the fixed portion of the contact, instead of the contact groove, it has various cross-sectional shapes as shown in FIGS. Even if the contact protrusion protruding from the surface is used, the intrusion of water along the interface between the fixed portion and the housing can be blocked.

Even if one shell protrusion is formed on the housing holding part of the shell, the intrusion of water along the interface with the housing can be suppressed, but the formation of multiple shell protrusions provides a higher waterproof function. can do. Similarly, even if one contact protrusion is formed on the fixed portion of the contact, the intrusion of water along the interface with the housing can be suppressed. However, it is better to form a plurality of contact protrusions for better waterproofing. An effect is obtained.
In order to block water intrusion along the interface with the housing, it is desirable that the shell protrusion and the contact protrusion have a height difference or height of, for example, 0.01 mm or more.
The grooves shown in FIGS. 24A to 24D and the protrusions shown in FIGS. 25A to 25D are, for example, mechanical processing such as laser processing, press processing, grinding processing, etching, or the like. It can be formed by using the chemical treatment.

  In the first to third embodiments, the shell grooves 34, 54, 64, and 65 are formed so as to surround the housing holding portions 33, 53, and 63. It is not always necessary to enclose the entire circumference of the housing holding portion, and a waterproof effect can be obtained even if it is formed only in a part along the circumference of the housing holding portion. However, it is possible to exhibit a more excellent waterproof function if it is formed so as to surround and close the housing holding portion.

Embodiment 5
FIG. 26 shows a main part of the contact 70 used in the waterproof connector according to the fifth embodiment. Similar to the contact 20 shown in FIG. 6, the contact 70 has a fixing portion 73 formed between the contact portion 71 and the board connecting portion 72, and the fixing portion 73 is embedded in the housing 10. . However, the fixed portion 73 is formed with a contact narrowing portion 75 that is formed narrower than the contact portion 71 and the substrate connecting portion 72, and a plurality of contact grooves 74 that are parallel to each other are formed on the outer peripheral surface of the contact narrowing portion 75. ing.
Thus, by forming the contact groove 74 on the surface of the contact constriction 75 that is narrower than the contact portion 71 and the substrate connection portion 72, the water intrusion path along the surface of the contact 70 is narrowed to enter the water. Therefore, the contact groove 74 can effectively improve waterproofness.
Instead of the contact groove 74, contact protrusions having shapes as shown in FIGS. 25A to 25D may be formed on the contact constriction 75.

Further, with respect to the contact 20 or 70, the contact groove 24 or 74 or the contact protrusion is formed in the fixing portion 23 or 73 embedded in the housing 10, so that the waterproof between the housing 10 and the contact 20 or 70 is performed. Further, a waterproof effect can be obtained by attaching a waterproof rubber to the contact and sealing between the housing and the contact, or sealing between the housing and the contact using a potting agent.
However, if contact grooves or contact protrusions are formed in the fixed part of the contact and integrated molding is performed, a waterproof rubber mounting step and a potting agent application step are not required, and the cost can be reduced and the potting agent is applied. It is avoided that it adheres to places other than a position and causes the quality of a product to fall.

  1 shell, 2 contact, 3 housing, 4 ground terminal, 10 housing, 10a front surface, 10b rear surface, 10c lower surface, 20, 70 contact, 21, 71 contact portion, 22, 72 substrate connection portion, 23, 73 fixing portion, 24 , 74 Contact groove, 30, 50, 60 Shell, 31, 51, 61 Fitting part, 31a Upper surface of fitting part, 32, 52, 62 Substrate mounting part, 33, 53, 63 Housing holding part, 33a, 53a Rear Projection, 33b, 53b Arm, 33c, 53c Leg, 34, 54, 64, 65 Shell groove, 35 Metal plate, 35a Strip portion, 35b Flat plate portion, 40 Housing, 41 Substrate, 42 Opening portion, 43 Gasket , 44 Ground pattern, 45 Wiring pattern, 75 Contact constriction, S space, C1 central axis.

Claims (15)

In a waterproof connector in which one or more contacts and a shell are integrally formed in a housing made of an insulating resin,
The shell includes a fitting portion that is exposed from the housing and engages with a mating connector, a substrate attachment portion that is exposed from the housing and attached to the substrate, and a space between the fitting portion and the substrate attachment portion. A housing holding part connected and embedded in the housing,
A waterproof connector, wherein a shell waterproof shape portion for blocking water intrusion along an interface between the housing holding portion and the housing is formed on a surface of the housing holding portion.   2. The waterproofing according to claim 1, wherein the shell waterproof shape portion includes a shell groove or a shell protrusion formed so as to separate the surface of the housing holding portion into the fitting portion side and the board mounting portion side. connector.   The waterproof connector according to claim 2, wherein the shell waterproof shape portion is formed so as to surround and surround the housing holding portion.   The waterproof connector according to claim 2, wherein the shell waterproof shape portion has a height difference of 0.01 mm or more.   The waterproof connector according to claim 2, wherein the shell waterproof shape portion includes a plurality of shell grooves or a plurality of shell protrusions.   The waterproof connector according to claim 2, wherein the shell groove or the shell protrusion has a cross-sectional shape of any one of a triangular shape, an arc shape, a quadrangular shape, and an inverted triangular shape. The housing holding portion includes a shell narrowing portion formed narrower than the fitting portion,
The waterproof connector according to claim 1, wherein the shell waterproof shape portion is formed on a surface of the shell constriction portion. The housing holding part has a hollow shape,
The waterproof connector according to claim 1, wherein the shell waterproof shape portion is formed on an outer peripheral surface and an inner peripheral surface of the housing holding portion, respectively. The contact includes a contact portion exposed from the housing and covered by the fitting portion of the shell, a substrate connection portion exposed from the housing and connected to the substrate, the contact portion and the substrate connection portion, And a fixing part embedded in the housing,
The waterproof structure according to any one of claims 1 to 8, wherein a contact waterproof shape portion for blocking water intrusion along an interface between the fixed portion and the housing is formed on a surface of the fixed portion. connector.   10. The waterproof connector according to claim 9, wherein the contact waterproof shape portion includes a contact groove or a contact protrusion formed so as to separate a surface of the fixed portion into the contact portion side and the substrate connection portion side.   The waterproof connector according to claim 10, wherein the contact waterproof shape portion is formed so as to surround and surround the fixed portion.   The waterproof connector according to claim 10 or 11, wherein the contact waterproof shape portion has a height difference of 0.01 mm or more.   The waterproof connector according to any one of claims 10 to 12, wherein the contact waterproof shape portion includes a plurality of contact grooves or a plurality of contact protrusions.   The waterproof connector according to any one of claims 10 to 13, wherein the contact groove or the contact protrusion has a cross-sectional shape of any one of a triangular shape, an arc shape, a quadrangular shape, and an inverted triangular shape. The fixing portion includes a contact narrowing portion formed narrower than the contact portion and the substrate connection portion,
The waterproof connector according to claim 9, wherein the waterproof contact shape portion is formed on a surface of the contact narrowed portion.

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