JP4873358B2 - Waterproof mounting structure for board connector - Google Patents

Description

  The present invention relates to an electronic apparatus in which an electrical circuit between relatively operating casings is connected via a board connection connector, such as a mobile phone that is expanded and contracted by sliding two casings relative to each other. Further, the present invention relates to a waterproof mounting structure for a board connecting connector in which the board connecting connector mounting portion is waterproof.

  2. Description of the Related Art Conventionally, mobile phones having a structure in which two casings are expanded and contracted by sliding relative to each other, such as mobile phones that are extended and shortened by sliding the two casings relative to each other, have become widespread. . In such a portable electronic device, the housings are connected by connection wiring such as a flexible printed circuit board (FPC), and electrical signals can be transmitted and received between the housings.

  In recent years, such an electronic device that has been waterproofed has been developed. As a method of waterproofing the connection wiring portion between the housings, water enters the housing from the connection wiring insertion port provided in the housing. In order to prevent this, there is a structure in which a cap for closing the insertion port of the housing is provided on the outer peripheral portion of the connection wiring, a packing is provided on the outer peripheral portion of the cap, and the insertion port is sealed in a watertight manner (for example, a patent Reference 1). The cap is formed integrally with the outer periphery of the connection wiring by, for example, insert molding in which a connection wiring is loaded into a mold, and then resin is injected and the connection wiring is wrapped with a molten resin and solidified.

  In addition to this, a window hole into which the connector plug is inserted into the housing is formed, and the connector plug fixed to the outer printed board outside the housing is inserted into the window hole and fitted into the internal connector socket. Then, a packing is interposed between the outer printed circuit board and the outer surface of the edge of the window hole of the housing, and the outer surface of the outer printed circuit board is pressed by a pressing plate screwed to the housing to close the window hole. What has been made (for example, Patent Document 2) has been proposed.

JP 2004-214927 A JP 2008-91091 A

  Of the above-described waterproof mounting structure of the conventional board connection connector, the housing insertion port is closed to the outer periphery of the connection wiring in order to prevent water from entering into the housing from the connection wiring insertion port provided in the housing. The structure in which the cap is provided has a problem that the cost of processing the parts is high.

  A structure in which a packing is interposed between the outer printed circuit board and the outer surface of the edge of the window hole of the housing and the outer surface of the outer printed circuit board is pressed by a pressing plate screwed to the housing is a housing other than the packing. There is a problem in that a pressing plate is required on the body, and the number of parts increases and the number of assembly steps increases.

  In view of such a conventional problem, the present invention has been made for the purpose of providing a waterproof mounting structure for a board connecting connector with a small number of components, a low processing cost, and a small number of assembly steps as compared with the conventional art.

  The feature of the invention according to claim 1, which solves the conventional problems as described above and achieves the initial object, is a connector socket fixed to the inner printed board inside the casing, and fixed to the outer printed board outside the casing. A board connection connector for attaching a board connection connector for connecting an inner and an outer printed board to each other by fitting the connector plug with each other through a window hole opened in the casing while keeping watertightness to the casing. In the waterproof mounting structure, the connector socket is exposed to the outside of the housing through the window hole, and a peripheral side surface of the outer side of the outer printed circuit board and a peripheral side surface facing the inner surface of the window hole of the connector socket are exposed to the connector socket. A seal material made of a ring-like rubber-like elastic material straddled on the outer periphery of the connector socket and the window hole is fitted with the seal material. The sealing material is pressed against the outer printed circuit board surface around the connector socket so that the watertightness between the connector socket and the connector socket is obtained by fitting the connector plug with the connector socket. It is in having it.

  According to a second aspect of the present invention, in addition to the configuration of the first aspect, an annular groove for fitting a sealing material is provided on the outer peripheral side surface of the connector socket, and the annular groove is formed on the inner peripheral surface of the sealing material. The fitting is integrally provided with fitting ridges, and the sealing material is prevented from coming off from the connector socket by fitting the ridges into the annular groove.

  According to a third aspect of the present invention, in addition to the configuration of the first or second aspect, the pressure contact between the sealing material and the surface of the outer printed board is elastic in the compression direction by the outer printed board. This is because the connector plug is kept from being detached from the connector socket in a deformed state.

  In the present invention, the connector socket is exposed outside the casing through the window hole formed in the casing, and between the connector socket and the window hole, on the outer printed circuit board side surface of the connector socket, and outside the outer periphery of the connector plug. By sealing between the printed circuit board surface with a sealing material, the space between the housing and the board connection connector and the inside of the board connection connector are waterproof, so that less parts are used for waterproofing than in the past. The processing cost is low, the number of assembling steps is small, and waterproof mounting of the board connector is performed at low cost.

  Further, in the present invention, the connector socket is provided with a sealing material made of a ring-like rubber-like elastic material straddling the peripheral portion of the side surface of the outer printed board and the peripheral side surface facing the inner surface of the window hole of the connector socket. The sealing material is fitted to the connector socket of the connector plug so that the sealing material is provided with water tightness in the gap between the outer peripheral side surface of the connector socket and the inner surface of the window hole. By making pressure contact with the printed circuit board surface and providing watertightness between the connector socket and the connector socket, only one seal material is required, and the connector plug can be fitted with a connector socket to provide waterproofness. Costs are not increased and the number of assembly steps is reduced.

  In the present invention, an annular groove for fitting a sealing material is provided on the outer peripheral side surface of the connector socket, and a protrusion that fits in the annular groove is integrally provided on the inner peripheral surface of the sealing material. By fitting the annular groove into the annular groove to prevent the sealing material from coming off from the connector socket, the sealing material can be attached to the connector socket in advance without dropping off, and assembly is facilitated.

  Furthermore, in the present invention, the pressure contact between the sealing material and the surface of the outer printed board is performed by keeping the connector plug with respect to the connector socket in a state in which the sealing material is elastically deformed in the compression direction by the outer printed board. By doing so, the locking mechanism of the connector plug with respect to the connector socket used for the conventional board connection connector can be used, and the conventional mass-produced part can be used as it is, and the processing cost is reduced.

1 is a longitudinally cut end surface showing an example of a waterproof mounting structure mounting structure for a board connecting connector according to the present invention. It is a top view which shows the connector socket which comprises the board | substrate connection connector shown by FIG. It is a front view same as the above. It is a longitudinal cross-sectional view same as the above. It is a top view which shows the connector plug which comprises the board | substrate connection connector shown by FIG. It is a front view same as the above. It is a longitudinal cross-sectional view same as the above.

  Next, embodiments of the present invention will be described based on examples shown in the drawings.

  In the figure, reference numeral 1 is a housing of the waterproof electronic device, 2 is an inner printed board housed in the housing 1, 3 is a window hole for inserting a board connection connector opened in the housing 1, and 4 is a board connection It is a connector. The board connector 4 electrically connects the inner printed board 2 and the outer printed board 5, and the outer printed board 5 is connected to a circuit in another casing (not shown) that operates relative to the casing 1. The FPC is used.

  The board connector 4 includes a connector socket 10 and a connector plug 11 that fits into the connector socket 10.

  As shown in FIGS. 2 to 4, the connector socket 10 has a pair of connector plug fitting grooves 13 formed in a connector socket housing 12 molded by an insulating synthetic resin. A large number of contacts 14, 14... Are projected at regular intervals. The terminal portions 14a of the respective contacts are exposed on both sides of the bottom surface of the connector socket housing 12, and are soldered to the circuit pattern terminal portions of the inner printed board 2.

  As shown in FIGS. 5 to 7, the connector plug 11 includes a connector plug housing 15 molded with an insulating synthetic resin and a pair of ridges 16 that fit into the connector plug fitting groove 13 of the connector socket 10. .., And contacts 17, 17... Contacting the contacts 14, 14. The terminal portions 17 a of the respective contacts 17, 17... Protrude from both sides of the top surface of the connector plug 11 and are soldered to the circuit pattern terminal portions of the outer printed board 5.

  Then, as shown in FIG. 1, the corresponding contacts 14 and 17 are brought into contact with each other and electrically connected by fitting the protrusion 16 of the connector plug 11 into the connector plug fitting groove 13. . At this time, the engagement protrusion 19 formed on the contact 17 of the connector plug 11 is fitted into the engagement recess 18 formed on the contact 14 of the connector socket 10, so that the connector socket 10 is connected to the connector socket 10. The plug 11 is prevented from coming off, and the engaging concave portion 18 and the engaging convex portion 19 constitute a retaining mechanism.

  The connector socket 10 is exposed to the outside of the housing 1 through the window hole 3, and between the connector socket 10 and the window hole 3, the top surface of the connector socket 10, that is, the surface on the outer printed circuit board 5 side, The space between the outer periphery of the connector plug and the outer printed board surface is sealed with a sealing material 20, thereby waterproofing the space between the housing 1 and the board connection connector 4 and the inside of the board connection connector 4.

  The sealing material 20 is formed in a ring shape by a rubber-like elastic material, and a flat plate ring-shaped top surface portion 20a that covers the peripheral surface of the top surface of the connector socket 10, and a cylindrical portion that is integrally suspended downward from the periphery. It has an L-shaped cross section consisting of 20b. On the inner peripheral surface of the cylindrical portion 20b, a convex strip 21 continuous in the circumferential direction is integrally projected.

  On the outer peripheral surface of the connector socket 10, an annular groove 22 for fitting the sealing material into which the ridge 21 is fitted is formed. By fitting the ridge 21 into the annular groove 22, the connector socket 10 is attached to the connector socket 10. The sealing material 20 is prevented from coming off. Further, the top surface portion 20 a is formed so that the protrusions 21 are fitted to the annular groove 22 in a state in which the top surface portion 20 a is in close contact with the top surface of the connector socket 10.

  The inner peripheral surface of the window hole 3 in a state where the cylindrical portion 20b of the sealing material 20 is elastically deformed in the radial direction by pushing the connector socket 10 into the window hole 3 with the sealing material 20 mounted on the connector socket 10. Between the connector socket 10 and the window hole 3 in a watertight state.

  In this way, the connector socket 10 is inserted into the window hole 3, the connector plug 11 is fitted in a state where the connector socket 10 is fixed at a predetermined position, and the outer printed board 5 is pressed against the upper surface portion 20 a of the sealing material 20. At this time, the connector socket 10 and the connector plug 11 have the engagement concave portions 18 and the engagement convex portions 19 of the contact pieces 14 and 17 in a state where the top surface portion 20a of the sealing material 20 is elastically deformed in the thickness direction. The upper and lower surfaces of the top surface portion 20a of the sealing material 20 are kept in pressure contact with the top surface of the connector socket 10 and the surface of the outer printed circuit board 5 so that watertightness is maintained. It has become.

  In this example, the retaining mechanism between the connector socket 10 and the connector plug 11 is shown by the engagement of the contact pieces 14 and 17, but such an elastic retaining mechanism between the contact pieces is shown. In addition, a mechanism that engages between the housings of the connector socket 10 and the connector plug 11 may be used.

DESCRIPTION OF SYMBOLS 1 Housing | casing 2 Inner printed circuit board 3 Window hole 4 Board connection connector 5 Outer printed circuit board 10 Connector socket 11 Connector plug 12 Connector socket housing 13 Connector plug fitting groove 14 Contact 14a Terminal part 15 Connector plug housing 16 Projection 17 Contact Child 17a Terminal part 18 Engaging concave part 19 Engaging convex part 20 Sealing material 20a Top surface part 20b Cylindrical part 21 Convex line 22 Annular concave groove

Claims (3)

A connector socket fixed to the inner printed circuit board in the housing and a connector plug fixed to the outer printed circuit board outside the housing are fitted to each other through a window hole opened in the housing, so that the inner and outer printed circuit boards are fitted together. A board-connecting connector waterproof mounting structure for attaching board-connecting connectors for connecting the boards to each other in a watertight manner,
The connector socket is exposed outside the housing through the window hole, and the connector socket has a ring shape straddling the peripheral edge of the side surface of the outer printed board and the peripheral surface facing the inner surface of the window hole of the connector socket. By fitting a sealing material made of a rubber-like elastic material, and providing the sealing material with watertightness in the gap between the outer peripheral side surface of the connector socket and the inner surface of the window hole, and by fitting into the connector socket of the connector plug A waterproof mounting structure for a board connecting connector, wherein the sealing material is pressed against an outer printed board surface around the connector socket to provide watertightness with the connector socket.   An annular groove for fitting a seal material is provided on the outer peripheral side surface of the connector socket, and a protrusion that fits into the annular groove is integrally provided on the inner peripheral surface of the seal material, and the protrusion is fitted into the annular groove. 2. The waterproof mounting structure for a board connecting connector according to claim 1, wherein the sealing material is prevented from coming off from the connector socket by matching.   The pressure contact between the sealing material and the surface of the outer printed circuit board is performed by keeping the connector plug from being detached from the connector socket in a state where the sealing material is elastically deformed in the compression direction by the outer printed circuit board. The waterproof mounting structure for a board connecting connector according to claim 1 or 2.

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