JP2010232013A - Connection structure of lid with connector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure of a lid with connector which facilitates insertion engagement work of a connector terminal and can secure a sealing performance. <P>SOLUTION: A guide pin 21 is installed on a top wall 10a of a cover 10, and a guide pin receiving part 22 is installed on a bottom wall 2a of a lid 2. In the guide pin 21, an engaging projection 23 capable of elastic deformation is integrated and engaged in an engaging recess 24 formed in the guide pin receiving part 22. By this engagement, positioning in axial direction and pull-stop of the guide pin (21) and the guide pin receiving part (22) are accomplished and, at the time of engagement, the seal member 17 is elastically deformed by the top part of the peripheral wall 2b of the lid 2 and the top wall 10a of the cover 10. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a connection structure of a cover with a connector used when a cover provided with a connector is attached to a cover provided with a connector.

  A connection structure for connecting connectors to each other is disclosed in Patent Document 1 and the like, and as shown in FIG. 4, a cover with a connector is attached to a lid with a connector that closes a case that houses a motor. What is known.

  In FIG. 4, a connector (41) is provided on a lid (2) that closes the case (1) and has a cylindrical shape with a bottom wall. The lid with the connector (41) has a cylindrical shape with a top wall. A cover provided with a connector (42) is attached.

  The connector (41) of the lid (2) has a substantially cylindrical connector housing part (43) and a terminal insertion part (44) provided in the connector housing part (43), and the connector of the cover (40) (42) has a substantially cylindrical connector housing part (45) formed integrally with the cover (40) and a terminal (46) provided in a projecting manner on the connector housing part (45).

  The lid (2) and the cover (40) are fitted so that the outer peripheral surface of the lid (2) and the inner peripheral surface of the cover (40) are just fitted, and the inner periphery of the cover (40). The O-ring (47) is fitted into the annular groove (40a) formed on the surface, and the tightening band (48) is tightened from the outer peripheral side of the cover (40), so that the lid (2) and the cover (40 ) Is secured.

Japanese Patent Laid-Open No. 9-84290

  For example, when a cover with a connector is attached to a lid with a connector that closes a case that accommodates a motor, it may be a manual operation in a place where it is difficult to see, and the connector terminal may not be securely connected.

  That is, in the conventional apparatus shown in FIG. 4, when the cover (40) is attached to the lid (2), the cover (40) is positioned by fitting (inlay portion) between the cover (2) and the cover (40), and then the connector The fitting between the housing parts (43) and (45) and the fitting between the connector terminal (46) and the terminal insertion part (44) are performed in this order. In this case, the positional accuracy between the connector housing part (45) and the connector terminal (46) integrally formed on the cover (40) varies relatively during manufacturing, so the terminal insertion part of the connector terminal (46) There was a problem that the fitting to (44) could not be performed well. This problem can be reduced by loosening the fit between the cover (2) and the cover (40). In this case, however, the sealing performance of the O-ring (47) is reduced, so the connector terminal (46) There is a problem of facilitating the fitting operation and ensuring the sealing performance.

  An object of the present invention is to provide a connection structure for a lid with a connector that facilitates fitting work of connector terminals and can ensure sealing performance.

  According to the connecting structure of the lid with a connector according to the present invention, a connector having a connector housing portion and a terminal insertion portion is provided on a lid that has a cylindrical shape with a bottom wall and closes the case. A connection structure for attaching a cover provided with a connector having a wall and having a larger diameter than a lid and having a connector housing portion and a connector terminal, the inner peripheral surface of the peripheral wall of the cover and the peripheral wall of the lid A gap of a predetermined amount or more is formed between the outer peripheral surface of the cover and an elastic seal member is interposed between the top of the peripheral wall of the lid and the top wall of the cover. A guide pin is provided on one of the opposing surfaces of the bottom wall, a guide pin receiving portion is provided on the other opposing surface, and an engaging convex portion is provided on one of the guide pin and the guide pin receiving portion. When the cover is attached to the lid, the fitting between the guide pin and the guide pin receiving portion, the fitting between the connector housing portions, and the fitting between the connector terminal and the terminal insertion portion are performed in this order. The guide pin and the guide pin receiving portion are prevented from coming off by the engagement between the engagement convex portion and the engagement concave portion, and at the time of the engagement, the top of the peripheral wall of the lid and the cover The sealing member is elastically deformed by the top wall.

  Conventionally, there is almost no gap between the inner peripheral surface of the cover peripheral wall and the outer peripheral surface of the cover peripheral wall, and these fittings (inlays) have a guide function for positioning (center alignment). In contrast, in the present invention, a gap of a predetermined amount or more is formed between the inner peripheral surface of the peripheral wall of the cover and the outer peripheral surface of the peripheral wall of the lid. Misalignment is allowed, and the cover can be moved in the required radial direction when the cover is attached to the lid. As an alternative to the fitting between the inner peripheral surface of the peripheral wall of the cover and the outer peripheral surface of the peripheral wall of the lid, a fitting between the guide pin and the guide pin receiving portion is employed. The connector terminal is fitted to the terminal insertion portion in a state where the connector terminals are positioned by fitting with each other. When the cover is attached to the lid, the guide pin and the guide pin receiving portion are fitted before the connector housing portions are fitted. At this stage, the connector housing portions are fitted together. The cover can be moved to some extent, so that the connector housing portions can be reliably fitted together, and the subsequent connector terminal fitting operation can be facilitated.

  The lid and the cover are made of, for example, a synthetic resin, and the connector and the guide pin or the guide pin receiving portion are integrally formed.

  The guide pin has a cylindrical shape or a truncated cone shape that becomes thinner toward the tip, and the guide pin receiving portion has a bottomed hole corresponding to the guide pin shape in the cylindrical body.

  The guide pin and the guide pin receiving portion are further provided with an engaging convex portion on one side and an engaging concave portion on the other side, and the guide pin and the guide pin are engaged by the engagement between the engaging convex portion and the engaging concave portion. Positioning in the axial direction with respect to the receiving portion and retaining are achieved. The engaging convex portion and the engaging concave portion are integrally formed on a guide pin or a guide pin receiving portion formed integrally with the lid and the cover. As for the shape, for example, the engaging protrusion is a plurality of claws or protrusions, and the engaging recess is a plurality of recesses or annular grooves, but is not limited thereto.

  The structure for ensuring the sealing performance is not to use the fitting between the inner peripheral surface of the cover peripheral wall and the outer peripheral surface of the cover peripheral wall and the O-ring, but the top of the cover peripheral wall and the cover top wall. It is performed by a sealing member having elasticity interposed between the two. For example, the seal member is fixed to the top of the peripheral wall of the lid with an adhesive, but may be fixed to the lower surface of the top wall of the cover with an adhesive. Here, in order to ensure the sealing function by the sealing member, when the axial positioning is performed by the engagement of the engaging convex portion and the engaging concave portion, the top of the peripheral wall of the lid and the top wall of the cover Thus, the seal member is elastically deformed. In other words, the engagement convex portion and the engagement concave portion have dimensions that cannot be engaged without elastic deformation of the seal member. Specifically, compared to the distance between the top of the peripheral wall of the lid and the top wall of the cover when the engaging convex portion and the engaging concave portion are engaged, the thickness of the seal member when free (the peripheral wall of the lid and the cover) The thickness of the portion sandwiched between the top wall and the thickness of the portion excluding the portion covered by the top outer peripheral portion of the peripheral wall of the lid is increased. By doing in this way, sealing performance and ease of connector terminal fitting work do not contradict each other, and sealing performance can be secured without hindering connector terminal fitting work.

  According to the connecting structure of the lid with a connector of the present invention, when the cover is attached to the lid, the fitting between the guide pin and the guide pin receiving portion is performed before the fitting between the connector housing portions. Since the cover can be moved to some extent in order to fit the parts, the connector housing parts can be reliably fitted together, and the subsequent connector terminal fitting work can be facilitated. And since the sealing member which has elasticity between the top part of the peripheral wall of a lid | cover and the top wall of a cover is interposed, a sealing performance can be ensured, without inhibiting the fitting operation | work of a connector terminal.

FIG. 1 is a cross-sectional view showing a first embodiment of a connection structure of a lid with a connector according to the present invention. FIG. 2 is a cross-sectional view showing a state before connection of the connection structure of the lid with a connector of FIG. FIG. 3 is an enlarged cross-sectional view of a main part showing a modification of the connection structure of the lid with a connector of the present invention. FIG. 4 is a longitudinal sectional view showing a connection structure of a conventional lid with a connector.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a first embodiment of a connecting structure for a lid with a connector according to the present invention.

  The connecting structure of the lid with a connector according to the present invention has a cylindrical shape with a bottom wall (2a), a lid (2) with a synthetic resin lid (2) with a connector (11) for closing the cylindrical case (1), and a top wall (10a). ) And a plastic cover (10) with a connector (12) attached to a lid (2) with a connector (11) and a seal between the lid (2) and the cover (10) And an annular seal member (17).

  In the case (1), for example, an electric machine such as a motor is arranged, the power supply and sensor wiring are connected to the connector (11) of the lid (2), and the connector (12) of the cover (10) is connected to the outside. It is taken out of the case (1) for connection.

  The connector (11) provided on the lid (2) includes a substantially cylindrical connector housing part (13) integrally formed on the lid (2) and a terminal insertion part (14) provided on the connector housing part (13). The connector (12) provided on the cover (10) is provided on the substantially cylindrical connector housing part (15) and the connector housing part (15) formed integrally with the cover (10). Connector terminal (16). The tip of the connector terminal (16) protrudes from the connector housing portion (15), and the terminal insertion portion (14) is formed in a concave shape into which the tip of the connector terminal (16) can be fitted.

  A gap (G) of a predetermined amount or more is formed between the inner peripheral surface of the peripheral wall (10b) of the cover (10) and the outer peripheral surface of the peripheral wall (2b) of the lid (2), and the lid (2) When the cover (10) is attached to the cover (10), the cover (10) can be displaced in any radial direction with respect to the lid (2).

  A cylindrical guide pin (21) is provided on the surface of the top wall (10a) of the cover (10) facing the bottom wall (2a) of the lid (2), and the bottom wall (2a of the lid (2) ) Is provided with a guide pin receiving portion (22) in which a cylindrical bottomed hole into which the guide pin (21) is just fitted is formed on the surface of the cover (10) facing the top wall (10a). .

  The connector housing part (15) provided on the cover (10) has a smaller diameter than the connector housing part (13) provided on the lid (2), and the tip of the connector housing part (15) on the cover side The part is fitted into a recess provided in the connector housing part (13) on the lid side.

  The guide pin (21) is further integrally formed with an elastically deformable engaging convex portion (23), and is fitted into an engaging concave portion (24) formed in the guide pin receiving portion (22). It is made to engage with. By this engagement, the axial positioning and retaining of the guide pin (21) and the guide pin receiving portion (22) are achieved. The shapes of the engaging convex portion (23) and the engaging concave portion (24) are not limited. However, as shown in FIG. 1, when the engaging convex portion (23) is a protrusion having a hollow portion, the engaging convex portion ( 23) is easily elastically deformed, and the guide pin (21) can be easily inserted into the guide pin receiving portion (22) and pulled out as necessary.

  The seal member (17) is fixed to the top of the peripheral wall (2b) of the lid (2) with an adhesive, and a concave groove (17b) for fitting the top of the peripheral wall (2b) of the lid (2) is sealed. It is formed on the member (17). The thickness of the seal member (17) when free (the thickness of the portion sandwiched between the peripheral wall (2b) of the lid (2) and the top wall (10a) of the cover (10), and the thickness of the peripheral wall (2b) of the lid (2) The thickness of the portion excluding the portion covered by the outer peripheral portion of the top) is the top of the peripheral wall (2b) of the lid (2) and the cover when the engaging convex portion (23) and the engaging concave portion (24) are engaged. It is made larger than the distance from the top wall (10a) of (10).

  In the state before the cover (10) is attached to the lid (2), as shown in FIG. 2, the distance between the tip of the guide pin (21) and the tip of the guide pin receiving portion (22) is A, and the connector housing portion on the cover side. (15) A <B <C, where B is the distance between the tip and the tip of the connector housing portion (13) on the lid side, and C is the distance between the tip of the connector terminal (16) and the tip of the terminal insertion portion (14). Yes. Further, the distance D that the engaging convex portion (23) and the engaging concave portion (24) move just to engage with each other, and the distance E between the top wall (10b) of the cover (10) and the seal member (17). And E <D.

  Therefore, when the operation of attaching the cover (10) to the lid (2) is performed, the first positioning is performed by first inserting the distal end portion of the guide pin (21) into the guide pin receiving portion (22). Next, the connector housing portion (15) on the cover side and the connector housing portion (13) on the lid side are fitted together, so that the second positioning is performed. As a result, the connector terminal (16) of the cover (10) is positioned so that the connector terminal (16) of the cover (10) is securely fitted to the terminal insertion part (14) of the lid (2) .By further pressing the cover (10), the connector terminal (16 The cover (10) is attached to the cover (2) in a state where the cover is firmly inserted into the terminal insertion part (14).

  The positioning in the axial direction is achieved by the engagement between the engaging convex portion (23) of the guide pin (21) and the engaging concave portion (24) of the guide pin receiving portion (22). In this state, the gap (G) between the cover (10) and the lid (2) needs to be sealed. Since this seal is E <D, in the state shown in FIG. The elastic sealing member (17) is sandwiched between the top of the peripheral wall (2b) of the lid (2) and the top wall (10a) of the cover (10) and is elastically deformed. Thus, the sealing property of the gap (G) between the inner peripheral surface of the cover (10) and the outer peripheral surface of the lid (2) is such that the fitting (inlay portion) between the lid (2) and the cover (10) and O Without using a ring, the lid (2) and the cover (10) are allowed to be misaligned and are excellent in waterproofness.

  As shown in FIG. 3, an annular groove (31) having a width wider than the width of the seal member (17) is formed on the top wall (10a) of the cover (10) with which the seal member (17) is brought into contact. By providing it as a seal receiving surface, it is possible to further ensure the sealing performance that allows misalignment between the lid (2) and the cover (10).

(1) Case
(2) Lid
(2a) Bottom wall
(2b) Perimeter wall
(10) Cover
(10a) Top wall
(10b) Perimeter wall
(11) Connector on the lid side
(12) Cover side connector
(13) Connector housing on the lid side
(14) Terminal insertion part
(15) Connector housing on the cover side
(16) Connector terminal
(17) Seal member
(21) Guide pin
(22) Guide pin holder
(23) Engaging projection
(24) Engaging recess
(G) Gap

Claims (1)

A lid having a cylindrical shape with a bottom wall and closing a case is provided with a connector housing portion and a connector having a terminal insertion portion. The lid with the connector has a top wall and has a larger diameter than the lid. A connection structure for attaching a cover provided with a connector having a connector housing portion and a connector terminal.
A gap of a predetermined amount or more is formed between the inner peripheral surface of the peripheral wall of the cover and the outer peripheral surface of the peripheral wall of the lid, and a sealing member having elasticity between the top of the peripheral wall of the lid and the top wall of the cover Between the top wall of the cover and the bottom wall of the lid, a guide pin is provided on the opposing surface of the cover, and a guide pin receiving portion is provided on the other opposing surface. An engaging convex part is provided on one side, and an engaging concave part is provided on the other side,
When the cover is attached to the lid, the fitting between the guide pin and the guide pin receiving portion, the fitting between the connector housing portions, and the fitting between the connector terminal and the terminal insertion portion are performed in this order. The guide pin and the guide pin receiving portion are prevented from coming off by the engagement between the engagement convex portion and the engagement concave portion, and the seal member is elastic by the top portion of the peripheral wall of the lid and the top wall of the cover during the engagement. A connection structure for a lid with a connector, wherein the connection structure is configured to be deformed.

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