JP7059874B2 - Device connector - Google Patents

Description

The techniques disclosed herein relate to connectors for equipment.

In an electric vehicle or the like, a device such as a motor is mounted in a state of being housed in a metal case, and a connector for the device such as a terminal block is attached and fixed to the metal case. As such a connector for a device, for example, a terminal block for a rotary electric machine described in Japanese Patent Application Laid-Open No. 2011-177002 (Patent Document 1 below) is known. This rotary electric terminal block is provided with a metal plate for fixing to the case. A resin pedestal is insert-molded on this plate, and a positioning pin is provided on the lower surface side of the pedestal. On the other hand, the case is provided with a pin hole, and the terminal block for a rotary electric machine is positioned by inserting the positioning pin into the pin hole.

Japanese Unexamined Patent Publication No. 2011-177002

However, in the above-mentioned device connectors, the resin pedestal contracts more than the metal plate due to the deformation of the resin due to heat shrinkage after insert molding, and the positioning pin rises from the plate, and the positioning pin and plate A gap is generated between the and, and the positioning pin provided on the pedestal tends to fall toward the center of the pedestal. As a result, the positioning pin deviates from the proper position, which makes it impossible to accurately position the terminal block for the rotary electric machine with respect to the case.

The device connector disclosed herein is a device connector that is attached to a case that houses the device, and is a metal plate-shaped mounting portion that is mounted and fixed to the case, and the mounting portion is an insert. A resin housing fixed by molding is provided, and the housing has a pedestal portion integrally molded with the mounting portion and a shape protruding from the mounting portion side to the case side, and is formed in the case. A positioning pin inserted into the provided recess is provided, and the mounting portion includes a floating prevention portion that prevents the positioning pin from floating from the mounting portion.

According to such a configuration, the floating prevention portion can prevent the positioning pin from floating from the mounting portion and falling toward the center of the pedestal portion due to the heat shrinkage of the resin that occurs after the insert molding. As a result, it is possible to prevent the positioning pin from deviating from the proper position, and as a result, the connector for the device can be accurately positioned with respect to the case.

In the above configuration, the floating prevention portion may be an inner wall of a hole formed so that the base end portion of the positioning pin is hooked on the mounting portion.

According to such a configuration, the base end portion of the positioning pin is arranged inside the hole of the mounting portion by insert molding, so that the inner wall of the hole can surely prevent the positioning pin from tipping over. can.

In the above configuration, the hole is formed so that the inner diameter becomes smaller toward the case side, and the base end portion of the positioning pin is formed so that the outer diameter becomes smaller toward the case side. It may be.

According to such a configuration, by processing the hole as described above, the outer peripheral surface of the base end portion of the positioning pin comes into contact with the inner peripheral surface of the hole, and the floating from the mounting portion of the positioning pin is surely prevented. Ru. Further, according to the processed shape of such a hole, the hole can be easily formed by, for example, pressing the mounting portion, and the positioning pin can be prevented from falling down by a simple method.

According to the device connectors disclosed herein, accurate positioning with respect to the case is possible.

Perspective view of the device connector from diagonally below Bottom view of the device connector from below Cross-sectional view of the connector for equipment according to the first embodiment (cross-sectional view taken along the line AA in FIG. 2). Cross-sectional view of the positioning pin and the float prevention portion according to the first embodiment (enlarged view of the positioning pin and the float prevention portion in FIG. 2). Sectional drawing of the positioning pin and the float prevention part which concerns on Embodiment 2.

<Embodiment 1>
The first embodiment will be described with reference to the drawings of FIGS. 1 to 4.
In the present embodiment, as an example of a connector for a device, it is attached to a metal motor case 20 (hereinafter referred to as “case 20”) shown by a two-dot chain line in FIG. 3 in which a motor (an example of a “device”) is housed. The device connector 10 is illustrated. As shown in FIG. 1, the device connector 10 includes a metal plate-shaped mounting portion 40 to be mounted and fixed to the case 20, and a resin housing 30 to which the mounting portion 40 is fixed by insert molding. , Equipped with.

As shown in FIGS. 1 to 3, the mounting portion 40 has a substantially trapezoidal plate shape, penetrates in the plate thickness direction of the mounting portion 40, and has an opening through which the terminal fitting 35 held by the device connector 10 is inserted. It has a part 41. This opening 41 is located substantially in the center of the mounting portion 40 and forms the inner circumference of the mounting portion 40. As shown in FIG. 2, the terminal fitting 35 is arranged so as to penetrate the opening 41 and extend over the electric wire side housing 31 and the device side housing 32. As shown in FIGS. 1 to 2, a plurality of mounting holes 42 for fixing the mounting portion 40 to the case 20 with screws are provided on the outer peripheral side of the mounting portion 40. The mounting hole 42 is provided at a position of the mounting portion 40 overhanging to the outside. Further, in the mounting portion 40, a floating prevention portion 43, which will be described later, is provided at a position where each positioning pin 34 and the mounting portion 40 come into contact with each other.

As shown in FIG. 1, the housing 30 is integrally molded with the mounting portion 40 by insert molding in an arrangement that penetrates the electric wire side housing 31 extending in the direction opposite to the case 20 side and the opening 41 of the mounting portion 40 in the vertical direction. It is configured to include a plate-shaped pedestal portion 33 and a device-side housing 32 having a shape protruding from the pedestal portion 33 toward the case 20. In the present embodiment, the housing 30 is composed of the electric wire side housing 31, the pedestal portion 33, and the device side housing 32. Further, the housing 30 holds a plate-shaped terminal fitting 35 that extends from the electric wire side housing 31 to the device side housing 32 in a bent state.

Further, the housing 30 is attached to a fastened portion (not shown) of the case 20 in a posture in which the electric wire side housing 31 is projected to the outside of the case 20 and the device side housing 32 is housed inside the case 20. At this time, the pedestal portion 33 is arranged along the outer surface of the case 20.

As shown in FIGS. 1 to 2, the pedestal portion 33 is provided with a plurality of positioning pins 34 for attaching the device connector 10 to the case 20 in a positioned state. The positioning pin 34 is provided at a position protruding outward from the outer edge of the pedestal portion 33. In the present embodiment, a pair of positioning pins 34 are provided, and these positioning pins 34 have a columnar shape and are provided so as to project from the mounting portion 40 toward the case 20.

Then, the positioning pin 34 is inserted into the recess 21 provided in the case 20 shown by the two-dot chain line in FIG. 3, whereby the device connector 10 is positioned with respect to the case 20. After that, the device connector 10 is fastened to the case 20 by inserting a screw (not shown) into the mounting hole 42 provided in the mounting portion 40 and fastening the connector 10 to the fastened portion (not shown) provided in the case 20. It is fixed.

The device connector 10 of the present embodiment has the above configuration, and next, the action and effect of the heat shrinkage of the resin after insert molding will be described.
First, the mounting portion 40, the terminal fitting 35, etc. are arranged in the mold, and the housing 30 and the mounting portion 40 are integrally molded by injecting the molten resin into the mold closed mold, and then in the cooling process. When the resin is cured and the mold is opened, the device connector 10 is obtained. At that time, due to the difference in the coefficient of thermal expansion between the metal and the resin, the resin contracts more than the metal, and the positioning pin 34 is pulled toward the center of the pedestal portion 33. At this time, the influence of the resin being pulled increases as the distance from the center of the pedestal portion 33 increases, and the positioning pin 34 located at a position protruding outward from the outer edge of the pedestal portion 33 is easily affected by the influence. Therefore, the positioning pin 34 tends to fall toward the center of the pedestal portion 33.

According to the present embodiment, the mounting portion 40 is provided with a floating prevention portion 43 for preventing the positioning pin 34 from floating, so that the positioning pin 34 can be prevented from falling. Specifically, a hole 44 is formed in the float prevention portion 43 at a position corresponding to the positioning pin 34, and the base end portion 34A of the positioning pin 34 is arranged inside the hole 44. Therefore, even if the heat shrinkage of the resin as described above occurs, the base end portion 34A is caught on the inner wall 43A of the hole 44, the positioning pin 34 does not float from the mounting portion 40, and the positioning pin 34 is prevented from falling. can do.

Further, as shown in FIG. 4, the inner wall 43A of the hole 44 has an inner diameter smaller than that of the positioning pin 34, and has a vertical portion 43A1 extending in the plate thickness direction from the case 20 side of the mounting portion 40 and an extending end of the vertical portion 43A1. It is configured to include an inclined portion 43A2 extending obliquely toward a surface opposite to the case 20 side. The inclined portion 43A2 is formed by so-called C-plane processing in which the corners of the holes 44 are tapped by press processing. That is, the inclined portion 43A2 is formed in the mounting portion 40 so that the inner diameter becomes smaller toward the case 20 side.

The base end portion 34A of the positioning pin 34 is arranged inside the hole 44 by injecting a molten resin into the inside of the hole 44 by insert molding. That is, the outer peripheral surface of the base end portion 34A is in contact with the inclined portion 43A2 of the inner wall 43A of the hole 44, and the base end portion 34A has a shape in which the outer diameter becomes smaller toward the case 20 side. Therefore, even if a large force pulling toward the center of the pedestal portion 33 is applied to the positioning pin 34, the base end portion 34A of the positioning pin 34 is caught by the inclined portion 43A2, and the positioning pin 34 is surely prevented from floating. Can be done. As a result, when the device connector 10 is attached to the case 20, it is possible to prevent the positioning pin 34 from deviating from the regular position, and the positioning pin 34 can accurately position the case 20.

Further, when the floating prevention portion 43 is processed on the mounting portion 40, the floating prevention portion 43 can be easily formed by pressing the metal mounting portion 40. That is, according to the press working, the float prevention portion 43 can be mass-produced at low cost, so that the positioning pin 34 can be prevented from falling by a simple method.

<Embodiment 2>
Next, the second embodiment will be described with reference to FIG.

In the present embodiment, as shown in FIG. 5, the mounting portion 140 is provided with a floating prevention portion 143 that prevents the positioning pin 134 from floating. The float prevention portion 143 is formed through a hole 144 in which the mounting portion 140 is tapped. By injecting the molten resin into the hole 144, the base end portion 134A of the positioning pin 134 is filled in the uneven portion 143A provided on the inner wall of the hole 144. Therefore, even when heat shrinkage of the resin occurs after insert molding, the concave-convex portion 143A is formed on the mounting portion 140 in the same manner as the action of the inner wall 43A of the first embodiment, so that the base end portion 134A of the positioning pin 134 Is caught on the uneven portion 143A, and the positioning pin 134 does not rise from the mounting portion 40, so that the positioning pin 134 can be reliably prevented from falling. Therefore, the same effect as that of the first embodiment can be obtained in this embodiment as well.

<Other embodiments>
The techniques disclosed herein are not limited to the embodiments described above and in the drawings, and include, for example, various embodiments such as:
(1) In the above embodiment, the floating prevention portion is configured by forming a through hole, but for example, a bottomed recess that does not penetrate the mounting portion may be formed.
(2) In the above embodiment, the inclined portion 43A2 and the uneven portion 143A are exemplified as the floating prevention portion, but the configuration related to the floating prevention portion is such that the positioning pin can be prevented from floating from the mounting portion. The configuration is not particularly limited.
(3) In the above embodiment, a hole is formed in the mounting portion at a position corresponding to the base end portion of the positioning pin, but the position where the hole is formed prevents the positioning pin from floating from the mounting portion. The position is not particularly limited as long as it can be used.
(4) In the above embodiment, the base end portion of the positioning pin is arranged inside the hole, but the position where the positioning pin is arranged inside the hole is not limited to the base end portion. For example, it may be slightly on the tip side of the base end portion of the positioning pin.

10 ... Device connector 20 ... Case 21 ... Recess 30 ... Housing 33 ... Pedestal 34 ... Positioning pin 34A ... Base end 40 ... Mounting 43 ... Floating prevention 43A ... Inner wall 44 ... Hole

Claims (2)

A device connector that can be attached to the case that houses the device.
A metal plate-shaped mounting part that is mounted and fixed to the case,
A resin housing in which the mounting portion is fixed by insert molding is provided.
The housing includes a pedestal portion integrally molded with the mounting portion, a shape protruding from the mounting portion side to the case side, and a positioning pin inserted into a recess provided in the case.
The mounting portion includes a floating prevention portion that prevents the positioning pin from floating from the mounting portion .
The floating prevention portion is a connector for equipment, which is an inner wall of a hole formed so that a base end portion of the positioning pin is hooked on the mounting portion . The first aspect of claim 1 , wherein the hole is formed so that the inner diameter becomes smaller toward the case side, and the base end portion of the positioning pin is formed so that the outer diameter becomes smaller toward the case side. Device connector.

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