JP4909542B2 - Housing and manufacturing method of housing - Google Patents

Description

  The present invention relates to a housing having an insert-molded terminal and a manufacturing method thereof, and more particularly to a housing capable of holding a terminal with a mold during insert molding and a manufacturing method thereof.

2. Description of the Related Art Conventionally, a housing made of resin and having a terminal inside by insert molding is known. An example of such a case is a detection device that detects a rotation angle of a throttle valve used in, for example, an automobile or a two-wheeled vehicle. In the case of the detection device, the sensor is attached to the housing, and a sensor connection portion connected to the sensor is formed at the terminal, and an external connection portion for taking out an output from the sensor is formed on the terminal. Insert molding is performed so that the external connection portion is exposed to the outside of the housing. As a detection apparatus having such a casing, for example, there is one disclosed in Patent Document 1.
JP 2002-39789 A

  However, when the terminal is insert-molded in the housing in this way, the terminal may be deformed by the resin flow, which may cause the externally exposed portion of the connection portion to be bent, etc., and may not be connected to the sensor or the external device. . For this reason, it has been known to provide a terminal with a protruding portion that protrudes outside the housing and prevent the terminal from being deformed by a resin flow by inserting the protrusion into a mold during insert molding. FIG. 7 shows a cross-sectional view of a housing in which a terminal having a protrusion is insert-molded.

  As shown in FIG. 7, the terminal 101 is embedded in the housing 100, one end of the terminal 101 is a sensor connecting portion 101 a for connecting to the sensor, and the other end is connected to the outside. The external connection portion 101b is connected to each other, and since these connection portions have different horizontal positions, the terminal 101 is bent at an intermediate position. A protruding portion 101c protruding outward is formed at the bent position of the terminal, and the tip of the protruding portion 101c abuts on the mold during insert molding so that the terminal 101 is not bent by the resin flow. It was.

  However, in the case of the case as shown in FIG. 7, the protrusion 101 c is formed on the terminal 101 and has a complicated shape, which causes the yield to deteriorate when the terminal 101 is manufactured. Further, since the shape of the terminal 101 is complicated, deformation may occur when the terminal 101 is plated and transported.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a casing having a terminal that can reliably resist resin flow with a simple shape and a method for manufacturing the same.

In order to solve the above problems, a housing according to the present invention is a housing in which a terminal portion is insert-molded in a main body portion made of resin.
The terminal portion has connection portions protruding from the main body portion at both ends, and a bent portion bent substantially at a right angle between the connection portions, and the main body portion is an outer surface of the bent portion and the surrounding portion. And an exposed portion that exposes the side surface to the outside, and the bent portion of the terminal portion is formed to be narrower than the peripheral portion .

  Furthermore, the housing according to the present invention is characterized in that the terminal portion is formed in a substantially linear shape from the bent portion to both connecting portions.

Furthermore, the manufacturing method of the housing according to the present invention is a manufacturing method of a housing formed by insert molding a terminal portion in a main body portion made of resin by a mold.
The mold is formed with a casing molding portion corresponding to the outer shape of the casing, and the terminal portion is formed with a connecting portion at both ends, and a bent portion bent at a substantially right angle is formed between the connecting portions. And
An exposed molded part that holds the bent part of the terminal part and its peripheral part is formed in the casing molded part, and the bent part and the outer surface and side surfaces of the peripheral part are in contact with the exposed molded part The terminal portion is arranged in the housing molding portion, and the body portion is molded by injecting a resin material into the housing molding portion.

  According to the housing according to the present invention, the terminal portion has the connection portions protruding from the main body portions at both ends, and has the bent portions bent substantially at right angles between the connection portions. By having an exposed portion that exposes the outer side surface and side surface of the peripheral portion to the outside, when molding the main body portion with the mold, the bent portion of the terminal portion and the outer side surface and side surface of the peripheral portion are molded. Since the terminal part can be controlled from four directions and can be held securely, the terminal part has a simple shape with good yield at the time of manufacture, and can resist resin flow. it can.

  Further, according to the housing according to the present invention, the bent portion of the terminal portion is formed to be narrower than the peripheral portion, thereby suppressing the bulging of the side surface accompanying the bending of the bent portion. The bent portion can be securely held.

  Furthermore, according to the housing according to the present invention, since the terminal portion is formed in a substantially linear shape from the bent portion to both connection portions, the terminal portion can be made in a simple shape, so that the cost can be reduced. In both cases, deformation of the resin flow can be made difficult to occur.

  Furthermore, according to the method for manufacturing the casing according to the present invention, the mold is formed with a casing molding portion corresponding to the outer shape of the casing, the terminal portion is formed with connection portions at both ends, and the connection is made. A bent portion that is bent at a substantially right angle is formed between the portions, an exposed molded portion that holds the bent portion of the terminal portion and its peripheral portion is formed in the housing molded portion, and the bent portion and its peripheral portion are formed in the exposed molded portion. The terminal part is arranged in the housing molding part with the outer surface and the side surface in contact with each other, and the body part is molded by injecting a resin material into the housing molding part, whereby the bent part of the terminal part is formed by a mold. And the peripheral part can be hold | maintained and it can resist the pressure by a resin flow, and can prevent a deformation | transformation of a terminal part.

  Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a housing in the present embodiment. The housing in this embodiment is provided with a detection unit (not shown) for detecting a rotation angle such as a rotary valve, and the terminal unit 2 is integrally insert-molded in the main body unit 1 made of a resin material. It will be.

  As shown in FIG. 1, a housing part 10 for housing the detection part is formed in the lower part of the main body part 1. A fixing portion 11 for fixing the housing is formed on the peripheral edge of the main body portion 1. Further, five terminal portions 2 are embedded side by side in the main body portion 1, and both end portions of the terminal portion 2 are exposed to the outside of the main body portion 1.

  Appearing in FIG. 1 is a sensor connection unit 20 for connecting to one end of the terminal unit 2 and the detection unit. The sensor connecting portion 20 has a tip portion bent into an L shape and protrudes to the front surface side of the main body portion 1 and can be connected to the detection portion by the protruding portion.

  FIG. 2 is a cross-sectional view taken along the line AA in FIG. As shown in this figure, the terminal portion 2 has the above-described sensor connection portion 20 formed at one end portion, and the other end portion protrudes from the main body portion 1 as an external connection portion 21 used for connection to the outside. It is formed to do. Further, a bent portion 22 bent in a substantially L shape is formed at an intermediate position between the sensor connecting portion 20 and the external connecting portion 21.

  FIG. 3 shows a perspective view of the terminal portion 2. As shown in this figure, the terminal portions 2 are each formed in a thin plate shape, and the sensor connection portion 20 and the external connection portion 21 are further narrowed. Further, the bent portion 22 to the sensor connecting portion 20 and the bent portion 22 to the external connecting portion 21 are formed in a substantially straight shape, and the terminal portion 2 as a whole has a simple shape having no protrusion. . For this reason, the terminal part 2 can be formed easily and the yield at the time of manufacture can also be made high.

  FIG. 4 shows an enlarged perspective view of the vicinity of the bent portion 22 of the terminal portion 2. As shown in this figure, the bent portion 22 has a stepped portion 22 a between itself and the peripheral portion 23, and is formed to be slightly narrower than the peripheral portion 23. As described above, since the bent portion 22 is formed to be narrow, the outward bulging of the side surface of the bent portion 22 due to the bending of the terminal portion 2 does not protrude outward from the side surface of the entire terminal portion 2. Can be. As will be described later, the side surface of the bent portion 22 is held by the mold when the main body portion 1 is molded by the mold, but the side surface of the bent portion 22 swells and protrudes from the entire side surface of the terminal portion 2 during bending. Then, the holding by the mold becomes unstable. It can prevent that the bending part 22 is formed narrowly.

  The exposed portion 12 is formed in the main body portion 1 so that the bent portion 22 of the terminal portion 2 is exposed to the outside. FIG. 5 shows an enlarged perspective view of the main body 1 near the exposed portion 12. As shown in FIG. 1, the exposed portion 12 is formed in the body portion 1 so as to have an opening in the upper portion of the accommodating portion 10, and as shown in FIG. 5, the bent portion 22 and the peripheral portion 23 of the terminal portion 2 are external. Expose the sides and sides. The peripheral portion 23 of the bent portion 22 has both a portion closer to the sensor connecting portion 20 than the bent portion 22 and a portion closer to the external connecting portion 21 than the bent portion 22, and the casing is molded by a mold. In doing so, the bent portion 22 and the peripheral portion 23 exposed from the exposed portion 12 of the terminal portion 2 are held by the mold.

  About the exposed part 12 of the main-body part 1, this is sealed with an adhesive agent after insert molding of the main-body part 1. Therefore, at the final product stage, the bent portion 22 and the peripheral portion 23 of the terminal portion 2 are not exposed to the outside. Since the bent portion 22 and the peripheral portion 23 of the terminal portion 2 do not have conventional protrusions, even if the expansion and contraction due to heat are repeated, the load on the adhesive is small, and peeling and cracking can be reduced. it can.

  Next, the manufacturing method of the housing | casing in this embodiment is demonstrated. The casing is formed by insert molding in which a resin is injected into the mold 30 and molded in a state where the terminal portion 2 is disposed in the mold 30. FIG. 6 shows a cross-sectional view of a substantially upper half of the mold forming the main body 1. In FIG. 6, the cross section at the same position as in FIG. 2 is shown so as to include the cross section of the terminal portion 2. As shown in this figure, the mold 30 is formed with a housing molding portion 31 that is a space corresponding to the outer shape of the main body portion 1, and the terminal portion 2 is disposed in the housing molding portion 31. .

  Further, the mold 30 is formed so that the exposed molding portion 32 protrudes from the housing molding portion 31 corresponding to the exposed portion 12 of the main body portion 1, and the exposed molding portion 32 is bent of the terminal portion 2. The terminal portion 2 is held by contacting the portion 22 and the peripheral portion 23. Further, the exposed molding portion 32 of the mold 30 abuts and holds the side surfaces of the bent portion 22 and the peripheral portion 23 of the terminal portion 2. As described above, the exposed molding portion 32 of the mold 30 regulates and holds the terminal portion 2 from the four directions at the bent portion 22 and the peripheral portion 23.

  When the resin material is injected into the housing molding part 31 of the mold 30 in a state where the terminal part 2 is disposed in the mold 30, the terminal part 2 receives pressure due to the resin flow. However, since the terminal portion 2 is held by the bent portion 22 and the peripheral portion 23 on the sensor connection portion 20 side and the peripheral portion 23 on the external connection portion 21 side by the exposed molding portion 32 of the mold 30, pressure due to the resin flow Therefore, the main body 1 can be molded without deforming the terminal 2.

  Although the embodiment of the present invention has been described above, the application of the present invention is not limited to this embodiment, and can be variously applied within the scope of the technical idea. In the present embodiment, the case of the detection device housing the detection unit for detecting rotation is shown. However, the present invention is not limited to this. The case is formed by insert molding terminal portions having connection portions protruding from the main body at both ends. If it is a body, it can be applied to other devices.

It is a front view of the housing | casing in this embodiment. It is AA sectional drawing of FIG. It is a perspective view of a terminal part. It is an expansion perspective view near the bent part of a terminal part. It is an expansion perspective view near the exposure part of a main-body part. It is sectional drawing of the substantially upper half of the metal mold | die which forms a main-body part. It is sectional drawing of the conventional housing | casing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Main-body part 2 Terminal part 10 Storage part 11 Fixing part 12 Exposed part 20 Sensor connection part 21 External connection part 22 Bending part 23 Peripheral part 30 Mold 31 Housing molding part 32 Exposed molding part

Claims (3)

In the case where the terminal part is insert-molded in the main body part made of resin,
The terminal portion has connection portions protruding from the main body portion at both ends, and a bent portion bent substantially at a right angle between the connection portions, and the main body portion is an outer surface of the bent portion and the surrounding portion. And a housing having an exposed portion for exposing a side surface to the outside, wherein the bent portion of the terminal portion is formed narrower than the peripheral portion . Housing of claim 1, wherein said terminal portion, characterized by comprising a generally linear shape to both connection portions from the bent portion. In the manufacturing method of the housing formed by insert molding the terminal part in the main body part made of resin by the mold,
The mold is formed with a casing molding portion corresponding to the outer shape of the casing, and the terminal portion is formed with a connecting portion at both ends, and a bent portion bent at a substantially right angle is formed between the connecting portions. And
An exposed molded part that holds the bent part of the terminal part and its peripheral part is formed in the casing molded part, and the bent part and the outer surface and side surfaces of the peripheral part are in contact with the exposed molded part A method for manufacturing a housing, comprising: arranging the terminal portion in a housing molding portion, and molding a main body portion by injecting a resin material into the housing molding portion.

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