JP2000200981A - Housing for electronic circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing for an electronic circuit which lessens the number of part items of an opening/closing hinge part of a box part and lid part and can facilitate hinging between the box body and lid body. SOLUTION: An abutting face at a side of a coupler and an end part at an opposite side have annular recess parts, and couplers 8, 8' provided with an axial body projecting unidirectionally along a downward edge part of a lid body 3 and a fixing piece are formed integrally at the downward edge part of the lid body 3. Bearing bodies 9, 9' are formed with an insert hole, into which an axial body 12 is inserted and a cutout part at a side of an abutment face, so that the fixing piece can move together with opening/closing of the lid body 3. The axial bodies 9, 9' are integrally formed at a position, in response to the couplers 8, 8' at the downward edge part of the box body 2. These opening/closing hinge parts 6, 6' comprise only the couplers 8, 8', the bearing bodies 9, 9', and an E-ring 10, and the number of part items is few. Furthermore, after the axial body is inserted into the insert hole, by only fitting the E-ring 10 on an annular recess part, the box body 2 can readily be hinged to the lid body 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing for an electronic circuit in a CATV electronic device such as a main line amplifier and a branch amplifier.

[0002]

2. Description of the Related Art Conventionally, as an electronic circuit housing for accommodating an amplifier circuit and the like, there is an electronic circuit housing described in Japanese Patent Publication No. 2639405. This electronic circuit housing is composed of a housing having an open surface, and a lid that opens and closes the opening surface of the housing, and a flange having a through hole for bolt penetration is provided at an edge of the lid, A bearing is provided at a position corresponding to the flange at the edge of the housing. And
A concave portion is formed on the bearing body on the side opposite to the flange portion, and a shaft having a screw hole for screwing a bolt is immersed in the concave portion. Further, a bolt insertion hole that penetrates the recess of the bearing body is provided on a surface of the bearing body facing the flange portion, and a bolt that penetrates the through hole of the flange portion through the bolt insertion hole is used for the screw of the shaft body. Screwed into the hole. Further, the bolt insertion hole is an elongated hole formed so that the bolt can move as the shaft rotates. In addition, the bearing body can be molded together with the casing by using a pair of molding dies that are aligned from the surface facing the flange and the concave side opposite to the flange.

[0003] The housing for the electronic circuit is usually hung on a well-known messenger wire stretched at a high place using a mounting bracket attached to the housing, so that the opening surface of the housing is horizontal. The opening / closing hinge portion, which faces in the direction and is composed of the flange portion, the bearing body, the shaft body, and the bolt, is disposed and used so as to be located at the lower edge portion of the housing opening surface.

[0004]

However, in the above-mentioned conventional electronic circuit housing, the bearing and the lid provided on the housing and the lid are provided as parts constituting the opening and closing hinge portion of the housing and the lid. In addition to the flange, a bolt and a shaft are required, and there is a problem that the number of parts is large.

When the cover is hinged to the housing, the shaft positioned in the recess of the bearing is supported and held by a fingertip, and the tip of the bolt is connected to the flange of the cover. Through the through-hole,
The bolt must be passed through the bolt insertion hole provided in the bearing body of the housing, and the screw must be aligned with the screw hole provided in the shaft, and then screwed together. This makes it difficult to hinge the lid to the housing. There was also a problem.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a reduced number of components in an opening / closing hinge portion of a housing and a lid, thereby facilitating the hinge attachment of the housing and the lid. The purpose is to provide.

[0007]

Means for Solving the Problems and Effects of the Invention The electronic circuit housing according to the first aspect of the present invention is made up of a housing and a lid like a conventional housing. A connector having a shaft protruding in a direction along the edge is integrally formed on one of the lower edges (the housing or the lid), and the connector (the lid or the housing) is formed on the lower edge of the other (the lid or the housing). A bearing body having an insertion hole through which the shaft body can be inserted is integrally formed at a position corresponding to the connector.

Therefore, in the electronic circuit housing of the present invention, the lid is opened and closed with respect to the housing by using the shaft as a rotation axis by inserting the shaft of the connector into the insertion hole of the bearing. An opening and closing hinge portion that can be connected as much as possible can be formed. At least one of the connector and the bearing is provided with a rotation restricting portion that restricts the opening and closing amount of the lid. The opening and closing amount of the lid can be limited to an arbitrary amount by the configuration of the rotation restricting unit. For example, the lid can be rotated with respect to the housing with the housing opening surface facing in the horizontal direction, and can be opened until the contact surface of the lid with the housing is slightly inclined from a horizontal plane. By configuring the rotation restricting portion as described above, the inner surface of the opened lid can be used as a table for temporarily storing tools.

As described above, in the electronic circuit housing of the present invention, the components constituting the opening and closing hinge portion of the housing and the lid are only the connector and the bearing which are integrally formed on the housing or the lid, respectively. Therefore, the number of parts of the opening and closing hinge portion can be reduced as compared with the conventional one. Further, when the housing and the lid are hinged, it is only necessary to insert the shaft into the insertion hole, so that the workability when connecting the housing and the lid can be improved.

In this case, the connector and the bearing are respectively formed by a pair of molding dies which are opposed to each other in a direction perpendicular to the opening of the housing when the opening of the housing is closed by the lid. And can be integrally molded. In addition, since the bearing body has an insertion hole, in order to integrally mold the bearing body with the housing or the lid, for example, the above pair of molding dies are combined, and a bar material is inserted into a portion to be the insertion hole. A method of pouring the material after the arrangement may be adopted.

However, it is more preferable that the shape of the bearing body has the following two notches. That is, two notches are formed on two surfaces of the bearing body, which are the formation surfaces of the insertion holes, that are continuous from the insertion holes and are cut out to the ends of the bearing body in opposite directions on both surfaces. The total of the notch depths in the insertion hole axial direction may be made equal to the insertion hole axial direction length. By doing so, the notch direction can be made to coincide with the removal direction, and a portion corresponding to each notch can be formed separately for each of the pair of molding dies. Can be integrally formed with the housing or the lid.

On the other hand, as a form of the rotation restricting portion, a system in which the shaft is formed in a prismatic shape and a bearing is provided with a locking portion for restricting the amount of rotation of the shaft can be considered. However, in this method,
A load that limits the amount of rotation of the lid as well as the weight of the lid is applied to the shaft, which may cause a problem in the material strength of the shaft.

In view of this, a projection fixing piece is provided on an edge of the connector remote from the shaft or an edge of the bearing remote from the insertion hole, and the bearing or connector without the projection fixing piece, or the housing. Alternatively, a method may be used in which the opening and closing amount of the lid is limited by contacting a part of the lid with the projection fixing piece.

However, as described in claim 2, when the shaft is inserted into the insertion hole, either one of a surface of the connector that comes into contact with the bearing and a surface of the bearing that comes into contact with the connector. Is provided with a fixing piece protruding from the contact surface, and the other is provided with a notch for accommodating the fixing piece so that the fixing piece can be moved with opening and closing of the lid, and the fixing piece is provided on the wall surface at the end of the notch. The opening and closing amount of the lid may be limited by contact.

According to this structure, only the own weight of the lid is applied to the shaft, and the rotation restricting portion is located within the plane where the connector and the bearing abut. There is no protrusion on the outside, and there is no danger that the worker who opens and closes the lid catches clothes. On the other hand, as described in claim 3, after the shaft body is inserted into the insertion hole, if the stopper is attached to one of the connector and the bearing body, the shaft body comes off from the insertion hole with respect to the lid. Even if a load in the axial direction of the shaft is applied, the lid does not come off the housing.

As a form of such a slip-off preventing member, an annular concave portion is provided by reducing the diameter of a part of the shaft at the end of the shaft, and an E-shaped retaining ring (E-ring) is attached thereto. Alternatively, a screw hole may be provided at the end of the shaft body for screwing the screw in the axial direction of the shaft body, and a screw with a washer larger than the diameter of the insertion hole may be screwed therein.

Even if such a slip-off prevention member is provided, the parts constituting the opening and closing hinge portion are only the connector, the bearing body and the slip-off prevention member, and the number of parts is smaller than that of the conventional one. The hinge between the housing and the lid can be easily made as described above. In addition, the edge part of the connector away from the shaft,
Or, at the edge of the bearing body away from the insertion hole, provided a protrusion having a screw hole on the bearing body side or the connector side surface,
After the shaft was inserted into the insertion hole, a washer was attached to the screw hole so that a part of the washer was placed on the surface of the bearing opposite to the connector, or on the surface of the connector opposite the bearing. When the screw is screwed, the surface of the washer and the bearing body on the side opposite to the connector, or the surface of the connector on the side opposite to the bearing body abuts. In this case, the screw with the washer functions as the rotation restricting portion that restricts the opening amount of the lid at an arbitrary angle, and also functions as the slip-off preventing member that prevents the shaft from falling out of the insertion hole. Function.

Also in this case, the parts constituting the opening / closing hinge portion are only a connector, a bearing body, and a screw having a washer which is a rotation restricting portion and also a slip-off preventing member. In comparison, the number of parts is small.

[0019]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a CA according to an embodiment of the present invention.
FIG. 2 is a diagram illustrating an overall configuration of an electronic circuit housing 1 of a TV electronic device.

As shown in FIG. 1, a housing 1 for an electronic circuit is provided.
Is composed of a housing 2 having an open surface, and a lid 3 for opening and closing the opening surface of the housing 2. Although not shown, a well-known electronic circuit is provided inside. The housing 2 and the lid 3
Are made of aluminum die-cast.

As shown in FIG. 1, the housing 2 has a messenger wire 4 laid between utility poles, for example, with an opening surface of the housing 2 closed by a lid 3 through a mounting bracket 5. Attached and used to face. Lid 3
Corresponds to the lower edge 2 of the opening surface of the housing 2 with respect to the housing 2.
It is hinged by opening and closing hinge portions 6 and 6 ′ provided at the locations, and is fastened by bolt fastening portions 7 provided at two places (a total of four places) on the upper and lower edges of the opening surface of the housing 2. .

One of the pair of opening / closing hinge portions 6, 6 'is composed of a connector 8, a bearing member 9, and a well-known E-shaped retaining ring 10 (hereinafter, referred to as an E-ring). The other opening / closing hinge portion 6 'is composed of only the connector 8' and the bearing 9 '. FIG. 2 is a diagram showing the shape of each component constituting the hinge part 6 (6 ').

When the lid 3 is arranged as shown in FIG. 1, the connector 8 (8 ') is integrally formed at a position to be a lower edge of the lid 3, and a bearing 9 (described later) will be described in detail. 9 ′) has a shaft body projecting in one direction (in this embodiment, rightward toward the opening surface of the housing) along the lower edge of the lid 3 on the connector-side contact surface 11. 12 and a fixing piece 13. The shaft 12 is a rotating shaft for opening and closing the lid 3, and has a cylindrical shape in which two facing chamfers 14 are formed on a side surface parallel to the axial direction of the shaft 12. The surfaces forming the two chamfers 14 are substantially perpendicular to the opening surface of the housing 2 when the opening surface of the housing 2 is closed by the lid 3 (in other words, the lower surface of the housing 2). (Parallel to the side wall). And, of the two connectors 8, 8 ',
At the end of one of the connectors 8 on the side opposite to the connector-side contact surface 11 of the shaft 12, a portion of the shaft 12 is reduced in diameter in order to mount the E-ring 10 shown in FIG. 2. Annular recess 1
5 are formed.

The bearing 9 (9 ') is integrally formed at a position corresponding to the connector 8 (8') at the edge of the housing 2, and the connector 8 (8 ') is brought into contact with the connector side. The bearing body side contact surface 16 that contacts the surface 11 has an insertion hole 17 and a contact surface side notch 18.
Are formed. The insertion hole 17 penetrates from the bearing body-side contact surface 16 of the bearing body 9 (9 ′) to the opposite end face 19, and is formed so that the shaft body 12 can be rotatably inserted. The shape of the insertion hole 17 as viewed from the axial direction of the hole is an oval shape that is long in a direction perpendicular to the opening surface of the housing 2. The contact surface side notch 18 corresponds to the notch in claim 2, and the cover 3 rotates about the shaft 12 from the state of FIG. The fixing piece 13 is formed so as to be movable with the contact surface with the cover 3 being slightly inclined from the horizontal plane, and is continuously connected to the insertion hole 17.
In the opposite direction to the end of the bearing 9 (9 '). Furthermore, the end face 19 is also cut from the end face 19 to the end of the bearing body 9 (9 ') in a direction opposite to the notch direction of the contact face side notch 18 continuously from the insertion hole 17. A notch 20 is provided. The total notch depth in the axial direction of the insertion hole 17 of the contact surface side notch portion 18 and the end surface side notch portion 20 is equal to the axial length of the insertion hole 17.

A groove 21 is formed in the surface of the housing 2 surrounding the opening surface and in contact with the lid 3, and a waterproof packing 22 is provided. Is formed with a ridge 23 for packing press corresponding to the concave groove 21. Next, the bolt fixing portion 7 will be described with reference to FIG. 4
As shown in FIG.
4, a flange portion 25, and a bolt fixing portion 26.

Each of the four bolts 24 has a thread groove formed only at the tip of the shaft of the bolt 24 (not shown), and the thread diameter at which the thread groove is formed has no thread groove. It is larger than the shaft diameter of the threadless portion on the side of the bolt 24 heads. A total of four flange portions 25 are provided at two positions on the upper and lower edges of the lid 3, and screw holes (not shown) for screwing bolts from a surface opposite to a surface in contact with a bolt fixing portion 26 described later in detail. Not). This screw hole differs in two stages in the axial structure of the hole. That is, a female screw portion on which a female screw is formed from the surface opposite to the contact surface with the bolt fixing portion 26 of the flange portion 25, and the screw of the bolt 24 from there to the contact surface with the bolt fixing portion 26. The through hole has a larger diameter than the shaft diameter of the portion. The axial length of the through hole is such that the thread of the bolt 24 can be accommodated.

A total of four bolt fixing portions 26 are provided on the upper and lower edges corresponding to the flange portion 25 of the housing 2, and screw holes (female screws) for screwing bolts through the screw holes of the flange portion 25 are formed. (Not shown). Then, the lid 3 is hinged and fixed to the housing 2 by the following procedure, and is in the state of FIG.

First, the four bolts 24 are screwed in advance from the female screw side of the four flange 25 screw holes, respectively, and the entire screw portion of the bolt 24 is located in the through hole in the flange 25 screw hole. State. Then, since there is a radial clearance between the threadless portion of the bolt 24 and the female thread portion of the flange portion 25 screw hole, the bolt 24 head and the bolt 2
The bolt 24 can be freely moved in the axial direction of the bolt 24 with the female screw portion of the flange portion 25 screw hole interposed between the screw portion 4 and the screw portion 4 as a locking portion. For example, in this state, the bolt 24 is moved to the position of the bolt fixing portion 2 in the positional relationship of FIG.
When the bolt 24 is moved to a position away from the bolt 6, the movement of the bolt 24 is restricted in a state where the screw portion of the bolt 24 is accommodated in the through-hole portion of the flange portion 25 and the female screw portion of the flange portion 25 is locked. .

Next, the lid 3 is hinged to the housing 2 at the opening / closing hinges 6, 6 'according to the following procedure. First, as shown in FIG. 2, the connector 8 (8 ') and the bearing 9
After the housing 2 and the lid 3 are arranged so that the connector-side contact surface 11 and the bearing body-side contact surface 16 of (9 ′) face each other, the shaft 12 is inserted into the insertion hole 17, The connector side contact surface 11 is brought into contact with the bearing body side contact surface 16. At this time, the shaft body 12 can be easily inserted into the insertion hole 17 by using the wall surface of the contact surface side notch 18 as a guide. At this time, the annular recess 15 provided only in the shaft body 12 of one of the two connectors 8 and 8 ′ is inserted into the insertion hole 17.
Is penetrated to the end face 19 side, and when the E-ring 10 is attached thereto, the hinge is completed.

It should be noted that, contrary to the above operation, the E-ring 10
Is removed from the annular concave portion 15, and the shaft body 12 is pulled out from the insertion hole 17, so that the lid 3 can be easily removed from the opening / closing hinge portions 6, 6 '. Then, after the above-mentioned hinged procedure, the lid 3 is fixed to the housing 2 by the bolt fixing part 7 by the following procedure.

First, the cover 3 is rotated about the shafts 12 of both the connectors 8 and 8 ′ as a rotation axis so that the positional relationship between the cover 3 and the housing 2 is as shown in FIG. 3, the opening surface of the housing 2 is closed, and the lid 3 and the housing 2 are brought into contact with each other at the opening surface of the housing 2. Then, the screw portions of the four bolts 24 are screwed into the screw holes of the four bolt fixing portions 26, respectively, so that the cover 3 is
The fixing of the housing 2 is completed. At this time, the bearing bodies 9 and 9 '
Since the shape of the insertion hole 17 is an oval shape that is long in the direction perpendicular to the opening surface of the housing 2, when the contact surfaces of the lid 3 and the housing 2 are aligned and the waterproof packing 22 and the ridge 23 come into contact with each other. Then, the shaft body 12 is in the insertion hole 17 near the edge farther from the opening surface of the housing 2. If the bolt 24 is screwed in this state, the clearance between the shaft body 12 and the insertion hole 17 is increased.
Is secured in the screwing direction, and a uniform force in a direction approaching the waterproof packing 22 can be applied to the entire ridge 23, and the waterproof property inside the electronic circuit housing 1 can be improved.

In the state where the electronic circuit housing 1 shown in FIG. 1 is installed, when the operator opens the cover 3 for checking or adjusting the internal electronic circuit, the following procedure is performed. First, all bolts 24 of the four bolt fixing portions 7 are loosened and removed from the screw holes of the bolt fixing portions 26. At this time, since the screw hole of the flange portion 25 has a through hole for accommodating the screw portion of the bolt 24, it is possible to remove all the bolts 24 individually in a state where the lid 3 and the housing 2 are in contact with each other. Can do it,
Since the bolt 24 is in a state where the female screw portion of the flange portion 25 is interposed between the bolt 24 head and the screw portion of the bolt 24 as a locking portion, the bolt 24 is locked by the female screw portion and does not fall out of the flange portion 25. Absent. And lid 3
Is rotated about the shafts 12 of both the connectors 8 and 8 ′ and opened from the housing 2. The opening of the lid 3 is limited by the fixing piece 13 abutting against the wall surface of the abutting surface side notch 18, and the lid 3 is held in that state. In other words, the fixing piece 13 and the contact surface side cutout 18 function as a rotation restricting part (particularly claim 2) that restricts the opening amount of the lid 3 in combination.

Even if the shaft 12 and the inner wall of the insertion hole 17 are rusted due to long-term use or salt damage caused by use in a coastal area, the shaft 12 has a chamfered portion 14 formed therein. , The insertion hole 17 has an oval shape, and the clearance between the shaft body 12 and the insertion hole 17 is large, so that the opening / closing hinge portions 6, 6 'and the surrounding parts are not damaged. The body 3 can be opened.

FIG. 3 shows a state in which the lid 3 is opened, and any one of the two opening / closing hinge portions 6 and 6 ′ in a state where the fixing piece 13 is in contact with the wall surface of the contact surface side notch 18 is shown in FIG. E-ring 10
FIG. 3 is a view seen from the axial direction of the shaft body 12 except for FIG. In FIG. 3, for easy understanding, the lid 3 and the connectors 8 and 8 ′ are indicated by solid lines, and the housing 2 and the bearings 9 and 9 ′ are indicated by dashed lines. Particularly, at the hinged portions between the connectors 8, 8 'and the bearings 9, 9', the state in the surfaces 11, 16 where the connectors 8, 8 'and the bearings 9, 9' come into contact is shown. That is, the bearings 9 and 9 ′ including the shafts 12 and the fixing pieces 13, the connectors 8 and 8 ′, the insertion holes 17 and the contact surface side cutouts 18, and excluding the end face side cutouts 20, are represented by solid lines and respectively. The fixing piece 13 is indicated by a one-dot chain line.
The state that the wall surface of the contact surface side notch 18 is in contact with the contact surface side notch 18 is easily understood.

From FIG. 3, it can be seen that the lid 3 is held with its contact surface with the housing 2 slightly inclined from the horizontal plane.
Therefore, the operator can use the inner surface of the opened lid 3 as a table for temporarily storing tools. That is, a concave portion is formed inside the contact surface of the lid 3 with the housing 2, and even if the contact surface of the lid 3 with the housing 2 is slightly inclined from the horizontal plane as described above, This recess can be used as the table described above. Also, by making the contact surface of the lid 3 with the casing 2 slightly inclined from the horizontal plane, the casing 2
When working while viewing the internal electronic circuit from the front, the inside of the concave portion of the lid 3 can be simultaneously put into view, so that the work is easy to perform.

The contact points between the fixing piece 13 and the wall surface of the notch 18 on the contact surface side are in the surfaces 11, 16 where the connectors 8, 8 'and the bearings 9, 9' are in contact. , 16, the opening and closing hinge portions 6, 6 'do not have a protruding portion, so that there is no danger of the worker catching clothes, and the work can be performed safely. As shown in FIG. 1, an E-ring 1 is provided in an annular recess 15 at the end of the shaft 12 of the connector 8.
Since 0 is attached, the lid 3 does not come off the housing 2 even if a load is applied to the lid 3 in the axial direction in which the shaft 12 comes out of the insertion hole 17. . That is, the E-ring 10 functions as a slip-off preventing member (claim 3) for preventing the shaft body 12 from slipping out of the insertion hole 17.

When the lid 3 is to be closed after inspection, adjustment, etc., the lid 3 may be closed in the reverse procedure to the above operation. That is, the cover 3 is rotated upward using the shafts 12 of both the connectors 8 and 8 ′ as a rotation axis, and the contact surfaces of the cover 3 and the housing 2 are aligned. It is screwed into the screw hole of the bolt fixing portion 26 at each location.

As described above, in the electronic circuit housing 1 of the present embodiment, the connectors 8, 8 'provided on the lid 3 and the housing as components constituting the opening and closing hinge portions 6, 6'. 2, the number of parts is smaller than that of the conventional one only by having the bearing bodies 9, 9 'and the E-ring 10.

When the cover 3 is hinged to the housing 2,
After the shafts 12 of the connectors 8, 8 'are inserted into the insertion holes 17 with the wall surfaces of the contact surface side cutouts 18 of the bearings 9, 9' as guides, the shafts 12 are provided on the shaft 12 on the connector 8 side. Just attach the E-ring 10 to the annular recess 15
Can be easily hinged.

When the lid 3 is rotated about the shafts 12 of both the connectors 8 and 8 'and opened from the housing 2, the fixing pieces 13
Abuts against the wall surface of the contact surface side notch portion 18 (corresponding to the notch portion in claim 2) to function as a rotation restricting portion (especially claim 2), and the opening amount thereof is limited. The location is the surface 11, where the connectors 8, 8 'and the bearing bodies 9, 9' abut,
Since the opening and closing hinge portions 6 and 6 'in this embodiment do not have projections outside the surfaces 11 and 16, there is no danger of the worker catching clothes.

The annular recess 15 at the end of the shaft 12 of the connector 8 has an E functioning as a slip-off preventing member.
Since the ring 10 is attached, even if a load is applied to the lid 3 in the axial direction in which the shaft 12 comes out of the insertion hole 17, the lid 3 does not come off the housing 2. Absent.

Further, the connectors 8, 8 'can be formed integrally with the lid 3 by a pair of molding dies facing in a direction perpendicular to the contact surface of the lid 3 with the housing 2, and the bearings 9, 8' 9 ′ is also formed by dividing the portions corresponding to the contact surface side notch portion 18 and the end surface side notch portion 20 into individual molding dies, so that a pair of moldings facing in the direction perpendicular to the opening surface of the housing 2. Depending on the mold, it can be integrally formed with the housing 2.

The shaft diameter of the shaft body 12 of the connectors 8 and 8 ′ is set so that the shaft body 12 can be rotatably inserted into the insertion hole 17.
7 must be smaller than the diameter of the shaft body 12, and when the shaft body 12 is formed, it is necessary to manage the shaft diameter within an allowable range. In this embodiment, the chamfered portions 14 are provided on the shafts 12 of the connectors 8 and 8 ′ from this viewpoint, and when the shafts 12 are formed, the mating surfaces of the pair of molding dies are fixed as follows. The surface is parallel to the axial direction of the body 12, and the chamfered portion 14 is vertically divided. This case is advantageous because it differs from the case where the cross-sectional shape of the shaft body 12 is a perfect circle in the following points.

First, when the cross-sectional shape of the shaft body 12 is a perfect circle, the portions corresponding to the shaft body 12 are equally divided and formed on the mating surface in each of the pair of molds. If the forming position is shifted in the axis diameter direction of the shaft body 12 in each of the molding dies, the shaft diameter of the formed shaft body 12 at the molding die mating surface position is added to the deviation of the shaft diameter as a design value. It will be. On the other hand, as in the present embodiment, the chamfered portion 14
In the shaft body 12 in which is formed, since the mating surface of the molding die is a surface that is parallel to the axial direction of the shaft body 12 and that divides the chamfered portion 14 vertically, the production position in each molding die is set as described above. Even if it is displaced in the same manner as in the above, the shaft diameter on the mating surface is smaller than that in the case where the cross-sectional shape is a perfect circle by the decrease in the shaft diameter due to chamfering. That is, the shaft 12 in each molding die
The allowable deviation amount in the shaft radial direction at the position is increased by the decrease in the shaft diameter due to the chamfering.

If the shaft diameter of the shaft body 12 is made sufficiently small with respect to the diameter of the insertion hole 17, the above-mentioned allowable deviation amount becomes large even if the cross-sectional shape of the shaft body 12 is a perfect circle. The strength of the attachment portions 6, 6 'is reduced. Further, in each of the pair of molds, even when a portion corresponding to the shaft body 12 is formed at an accurate position, when the lid body 3 is cast, there is a possibility that the mating surface is slightly shifted in the shaft radial direction. In such a case, similarly to the above, it is possible to tolerate a displacement of the mating surface in the axial direction by an amount corresponding to a decrease in the shaft diameter due to chamfering.

On the other hand, in the bearing bodies 9 and 9 'shown in this embodiment, the contact surface side notch 18 and the end surface side notch 20
In the bearing body side contact surface 16 and the end surface 19, the insertion hole 17
From the contact surface side to the end of the bearing body 9, 9 ′, and the contact surface side notch 1.
The total notch depth in the axial direction of the insertion hole 17 of the notch 8 and the end face side notch 20 is equal to the length of the insertion hole 17 in the axial direction. Therefore,
If the portions corresponding to the contact surface side notch portion 18 and the end surface side notch portion 20 are formed separately for each molding die, the direction of die removal when casting the housing 2 is one in the opposite notch direction. Therefore, the bearing bodies 9 and 9 ′ can be integrally formed with the housing 2 as described above.

In this case, when the housing 2 is cast, if the mating surfaces of the pair of forming dies are shifted in the direction of the punching die, the insertion hole 1
Although the diameter of the insertion hole 17 in the direction perpendicular to the opening surface of the housing 2 becomes small, the design shape of the insertion hole 17 is an oval shape long in the direction perpendicular to the opening surface of the housing 2 as described above. Can be inserted to the extent that there is no problem in opening and closing the cover 3.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.
Various embodiments can be adopted. For example, in the above-described embodiment, the fixing piece 13 is provided on the connector-side contact surface 11, and the contact surface side notch 18 is provided on the bearing body-side contact surface 16.
Has been described as limiting the opening amount by contacting the wall surface of the contact surface side notch portion 18, but conversely, the notch corresponding to the contact surface side notch portion 18 is formed in the connector side contact surface 11. A portion may be provided, and the fixing piece 13 may be provided on the bearing body side contact surface 16.

In the above embodiment, the lid 3 is the shaft 1
1 is rotated from the state shown in FIG. 1 around the rotation axis, and when the contact surface of the lid 3 with the housing 2 becomes slightly inclined from the horizontal plane,
Although the fixing piece 13 and the wall surface of the contact surface side notch 18 are in contact with each other, the position of the fixing piece 13 on the connector side contact surface 11 and the shape of the contact surface side notch 18 may change the shape of the lid 3. It is clear that the opening angle of the can be set arbitrarily.

In the above-described embodiment, the housing 2 is provided with the bearings 9 and 9 'and the lid 3 is provided with the connectors 8 and 8'. Obviously, the same effect can be obtained by providing the bearings 8, 9 'on the lid 3 and the bearings 9, 9' on the lid 3.

In the above embodiment, the E-ring 10 is described as being attached to only the annular recess 15 provided on the shaft 12 of one connector 8. However, the E-ring 10 is also attached to the shaft 12 of the other connector 8 ′. The E-ring 10 may be attached to both of the two annular recesses 15 after the annular recess 15 is provided. In this case, as compared with the above embodiment, when a load is applied to the lid 3 in the axial direction in which the shaft 12 comes out of the insertion hole 17, the lid 3 is further detached from the housing 2. There is an effect that it becomes difficult.

In the above embodiment, the opening and closing hinge portion is 6,
6 ′ and two places, but one place or three places for reasons of strength, design, etc. required for holding the lid 3.
Of course, more than two places may be provided. Further, the number of the bolt fixing portions 7 is not limited to four.

The opening / closing hinge portions 6, 6 'may be configured as shown in FIGS. Here, FIG. 4 is a view showing the shape of each component constituting the opening and closing hinge portions 6, 6 '. FIG. 5 shows the opening / closing hinge portions 6 and 6 ′ in a state where the lid 3 hinged to the housing 2 is opened, similarly to FIG.
FIG. 3 is a view of the shaft body 12 viewed from the axial direction, in which a lid 3 and connectors 8 and 8 ′ are indicated by solid lines, and a housing 2 and bearings 9 and 9 ′ are indicated by dashed lines. In FIG. 3, the state in the surfaces 11, 16 where the connectors 8, 8 'and the bearings 9, 9' are in contact with each other is shown at the hinged positions of the bearings 9, 9 '.

The shapes of the connectors 8, 8 'and the bearings 9, 9' shown in FIGS. 4 and 5 are different from those of the above embodiment in the following points. First, the connectors 8, 8 'do not include the fixing piece 13 on the connector-side contact surface 11, unlike the above-described embodiment, and the shape of the shaft body 12 is cylindrical. In addition, a protrusion fixing piece 27 is provided at an edge of the connectors 8, 8 'remote from the shaft body 12.

As shown in FIG. 5, the projection fixing piece 27 moves the lid 3 hinged to the housing 2 to close the shaft 12 from the state in which the opening surface of the horizontally oriented housing 2 is closed. Pivot to the center,
When the lid 3 is opened until the contact surface with the housing 2 is slightly inclined from the horizontal plane, the lid 3 is formed to contact the lower end 28 of the edge of the opening surface of the housing 2.

It is needless to say that the shape of the shaft body 12 may be a shape in which two chamfers are provided in a cylindrical shape as shown in the above-described embodiment, but the shape is completely as shown in FIG. 4 and FIG. In this case, the rotation of the shaft body 12 with respect to the insertion hole 17 becomes smooth in this case.

Further, the rotatable angle of the lid 3 with respect to the housing 2 can be arbitrarily set according to the position of the projection fixing piece 27 with respect to the connectors 8, 8 ', as in the above embodiment. Contact surface side notch 18 and end surface side notch 2 in bearing bodies 9, 9 ′
The notch direction of 0 is the bearing body side contact surface 16 and the end surface 19.
Is the reverse of the above embodiment. That is, the contact surface side cutout 18 is continuously cut from the insertion hole 17 in the direction toward the lid 3, and the end surface side cutout 20 is continuously cut from the insertion hole 17 in the direction opposite to the lid 3. Is missing. Further, the contact surface side notch portion 18 does not need to be large because the fixing piece 13 is not provided on the connector side contact surface 11, so that the bearing member 9,
The notch has a substantially uniform width up to the 9 'end.

The connectors 8, 8 'and the bearing 9, 9 shown in FIG.
The hinge procedure of the housing 2 having the 9 ′ and the lid 3 is as follows.
The shaft body 12 of 8 ′ is connected to the notch 1 on the contact surface side of the bearing bodies 9 and 9 ′.
8, the E-ring 10 is simply attached to the annular concave portion 15 after the connector-side contact surface 11 and the bearing-member-side contact surface 16 are brought into contact with each other through the insertion hole 17 with the wall surface of the guide 8 as a guide. As in the example, the hinge can be more easily hinged than the conventional one.

The components constituting the opening and closing hinge portions 6, 6 'are the connectors 8, 8', the bearing 9, the same as in the above embodiment.
Only 9 'and E-ring 10 are less than conventional ones. When the lid 3 is opened after being hinged as described above, the projection fixing piece 27 comes into contact with the lower end 28 of the edge of the opening surface of the housing 2 as shown in FIG. That is, the protrusion fixing piece 27 functions as a rotation restricting portion (claim 1), and can restrict the opening amount of the lid 3 in the same manner as in the above embodiment. In this case, as can be seen from FIGS. 4 and 5, the protrusion fixing pieces 27 protrude outside the contact surfaces 11 and 16. However, the shape of the contact surface side notch 18 is smaller on the bearing body side contact surface 16 than in the above embodiment, so that the bearing body 9,
The strength for supporting the 9 'lid 3 is increased.

The connectors 8, 8 'shown in FIGS.
Is formed integrally with the lid 3 by a pair of molding dies opposed in a direction perpendicular to the contact surface of the lid 3 with the housing 2 in the same manner as in the above embodiment. Also, the notch 1 on the contact surface side of the bearing body 9, 9 ′
Even if the notch direction of 8 and the end face side notch part 20 is opposite to the above-mentioned embodiment as described above, the location corresponding to the contact face side notch part 18 and the end face side notch part 20 is the same as in the above embodiment. The bearings 9 and 9 ′ including the insertion holes 17 can be integrally formed with the housing 2 by a pair of molding dies that are opposed to each other in a direction perpendicular to the opening surface of the housing 2. Molded.

The projection fixing pieces 27 are provided on the bearings 9 and 9 '.
In this case, the protrusion fixing piece 27 contacts a part of the lid 3 to function as a rotation restricting portion (claim 1). Further, the shapes of the connectors 8, 8 'and the bearings 9, 9' may be as shown in FIG.

The connectors 8, 8 'and the bearing 9, shown in FIG.
The shape of 9 'differs from the above embodiment in the following points. The connectors 8, 8 'are different from the above-described embodiment in that the connector-side contact surface 11
Is not provided with a fixing piece 13, the shape of the shaft body 12 is a columnar shape, and a screw is screwed in an axial direction of the shaft body 12 at an end of the shaft body 12 opposite to the connector-side contact surface 11. Screw holes 29 are provided. Further, one or both of the pair of connectors 8 and 8 ′ are provided with a bearing 9,
Projection 3 having screw hole 30 for screwing on the 9 'side
1 is provided.

In this case as well, the shape of the shaft body 12 may of course be a shape in which two chamfers are provided in a columnar shape as shown in the above-described embodiment. The rotation of the shaft body 12 with respect to the insertion hole 17 becomes smooth. Further, the contact surface side notch 1 in the bearing body 9, 9 ′
The notch directions of the notch 8 and the end face side notch 20 are the same as those in the above embodiment in the bearing body side contact face 16 and the end face 19, but the contact face side notch 18 is in the connector side contact face 11. Since there is no fixing piece 13, it is not necessary to take a large size, and the notch has a substantially uniform width from the insertion hole 17 to the end of the bearing body 9 or 9 '.

The connectors 8, 8 'and the bearing 9, shown in FIG.
The 9 'hinge procedure is as follows. First, similarly to the above embodiment, the shafts 12 of the connectors 8, 8 'are connected to the bearings 9, 9'.
With the wall surface of the notch 18 on the contact surface side of the
So that the connector-side contact surface 11 and the bearing-body-side contact surface 16 are in contact with each other. The screw 33 is screwed together with the washer 32 having an outer diameter larger than the diameter of the insertion hole 17 into the screw hole 29 of the shaft body 12.
, It is possible to easily hinge as in the above embodiment. In this case, the screw 33 with the washer 32 functions as a slip-off preventing member (Claim 3), and can prevent the shaft body 12 from dropping out of the insertion hole 17 as in the above embodiment.

Further, when the screw 35 is screwed together with the washer 34 into the screw hole 30 of the projection 31, a part of the washer 34 comes into contact with the end face 19 of the bearing body 9, 9 '. The positional relationship between the connectors 8, 8 'and the bearing bodies 9, 9' is
And the end face 19 is held in a state where the end face 19 abuts. In other words, the screw 35 with the washer 34 serves as the rotation restricting portion.
, And the opening / closing amount of the lid 3 can be restricted at an arbitrary opening angle.

In actual use, for example, the following operation is performed. When the lid 3 is opened and closed with respect to the housing 2, the screw 35 screwed into the screw hole 30 of the projection 31 is slightly loosened, so that there is a slight clearance between the washer 34 and the end face 19. Thereafter, the lid 3 is rotated about the shaft 12 to open and close. When the opening and closing amount of the lid 3 is limited by a certain opening angle, the screw 35 is screwed into the screw hole 30 while supporting the lid 3 rotated to that angle by hand, and a part of the washer 34 is formed. Should be brought into contact with the end faces 19 of the bearing bodies 9 and 9 '.

In this case as well, similarly to the projection fixing piece 27 shown in FIGS. 4 and 5, the projection 31 protrudes outside the contact surfaces 11 and 16. However, the shape of the notch 18 on the contact surface side can be made smaller than that of the above embodiment because of the absence of the fixing piece 13, so that the strength for supporting the lid 3 of the bearing bodies 9 and 9 'is increased. become.

The connectors 8, 8 'shown in FIG. 6, except for the screw holes 29, 30, are formed by a pair of molding dies facing the contact surface of the lid 3 with the housing 2 in a direction perpendicular thereto. It is integrally formed with the body 3. The screw holes 29 and 30 are provided between the lid 3 and the connector 8,
After casting of 8 ', it is formed at a predetermined location. In addition, the bearing bodies 9 and 9 ′ are provided with the contact surface side notch 18 and the end surface side notch 20.
Can be formed separately for each molding die as in the above embodiment, so that the pair of molding dies facing the opening surface of the housing 2 in a direction perpendicular to the opening surface of the housing 2 including the insertion hole 17 can be used. It is formed integrally with the housing 2.

On the other hand, with respect to the opening / closing hinge portions 6 and 6 ′ shown in FIG. 6, a form in which the screw hole 29 of the shaft body 12 is eliminated (more precisely, in addition to the screw hole 29, the washer 32 and the screw 33 is also possible. FIG. 7 shows the opening and closing hinge portions 6, 6 'in this case, with the lid 3 opened.
FIG. 2 is a diagram viewed from an axial direction of FIG. In this case, the screw 35 with the washer 34 functions as a rotation restricting portion (claim 1) by a part of the washer 34 abutting on the end face 19.
Since the displacement regulation of the end face 19 of the washer 34 also prevents the shaft body 12 from dropping out of the insertion hole 17,
It also functions as a detachment prevention member (claim 3).

In this case, the hinge between the housing 2 and the lid 3 guides the shafts 12 of the connectors 8 and 8 ′ to the wall surfaces of the notch portions 18 on the contact surfaces of the bearings 9 and 9 ′. After that, the connector side contact surface 11 and the bearing body side contact surface 16 are brought into contact with each other, and the screw 35 together with the washer 34 is inserted into the protrusion 3.
It is only screwed into one screw hole 30, and it can be more easily hinged than the conventional one.

In this case, the components constituting the opening / closing hinge portions 6, 6 'are the connectors 8, 8', the bearing bodies 9, 9 ', and the rotation restricting portion (claim 1). Only a screw 35 with a washer 34 which is a member (claim 3) is used, and the number of parts is smaller than that of a conventional one.

When the position of the projection 31 in a state where the cover 3 is closed with respect to the housing 2 is close to the housing 2 at the edges of the connectors 8 and 8 ′, the cover 3 is slightly The screw hole 30 is hooked on the bearing body-side contact surface 16 in a state where the cover body 3 is opened at a certain angle. At a larger angle, the opening amount of the lid 3 cannot be limited by the screw 35 with the washer 34. Therefore, when it is desired to limit the opening angle of the lid 3 in a wider angle range, it is necessary to provide the projection 31 at the edge of the connectors 8 and 8 ′ as far as possible from the housing 2. Further, the number of the protrusions 31 is not limited to one, but may be plural. In this case, according to the opening angle of the lid 3, of the projections 31 in which the screw holes 30 are not hung on the bearing body-side contact surface 16, those which are easy for the operator to operate are selected. If a screw 35 with a washer 34 is screwed into the hole 30, a part of the washer 34 comes into contact with the end face 19, so that the opening amount of the lid 3 can be limited. Then, in this state, if there is another projection 31 in which the screw hole 30 is not hung on the bearing body side contact surface 16, a screw 35 with a washer 34 is screwed into the screw hole 30, and the washer 34 is screwed. Of the shaft body 12 can be more securely prevented from coming out of the insertion hole 17 by contacting a part of the shaft body with the end face 19.

The projection 31 may be provided at an edge of the bearings 9 and 9 ′ remote from the insertion hole 17. In this case, the screw hole 30 is connected to the connector 8 of the projection 31.
It is provided on the 8 'side. Then, after the shaft body 12 is inserted into the insertion hole 17, a part of the washer 34 is connected to the shaft body 1 of the connectors 8, 8 '.
Screw hole 30 so as to abut on the surface opposite to the surface having
On the other hand, if the screw 35 is screwed together with the washer 34, the screw 35 with the washer 34 functions as a rotation restricting portion (claim 1) and a slip-off preventing member (claim 3), as described above.

[Brief description of the drawings]

FIG. 1 is a diagram showing the overall structure of an electronic circuit housing.

FIG. 2 is a view showing the shapes of components constituting an opening / closing hinge portion.

FIG. 3 is a view of the opening and closing hinge portion as viewed from an axial direction of a shaft body.

FIG. 4 is a view showing the shape of a part constituting an opening and closing hinge as a modification.

FIG. 5 is a view of an opening / closing hinge as a modification viewed from an axial direction of a shaft body.

FIG. 6 is a view showing the shapes of components constituting an opening and closing hinge as a modification.

FIG. 7 is a view of an opening / closing hinge as a modification viewed from an axial direction of a shaft body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Housing for electronic circuits, 2 ... Housing, 3 ... Lid, 6,
6 ': Opening / closing hinge, 8, 8': Connector, 9, 9 ': Bearing body, 10: E-ring (prevention member), 11: Connector side contact surface, 12: Shaft, 13 ... Fixing piece, 16: contact surface on bearing body side, 17: insertion hole, 18: cutout on contact surface side, 27: projection fixing piece (rotation restriction part), 32: washer (prevention member), 33: screw (release) Prevention member), 34 ... Washer (rotation restriction part and detachment prevention member), 35 ... Screw (rotation restriction part and detachment prevention member).

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Tsuneyuki Inayoshi 80 Nojo, Asada-cho, Nisshin-shi, Aichi F-term (reference) in Maspro Denko Corporation 4E360 AB14 BA08 BB02 BB12 BB22 BC05 CA01 EC03 EC14 ED02 GA53 GB06 GC02

Claims (3)

[Claims] 1. A housing having an opening on one side and a lid for opening and closing the opening of the housing, wherein an electronic circuit can be housed therein, and the opening surface of the housing is arranged in a horizontal direction. In the electronic circuit housing to be used, a connector having a shaft protruding in a direction along the edge is integrally formed on one of the lower edge of the housing and the lid, and A bearing body having an insertion hole through which the shaft body can be inserted is integrally formed at a position corresponding to the connector at the other lower edge of the housing and the lid where the connector is not provided, and By rotatably inserting the shaft into the hole, an opening / closing hinge portion of the housing and the lid having the shaft as a rotation axis is formed, and the connector and the bearing are provided. , At least one of them is provided with a rotation restricting portion for restricting an opening and closing amount of the housing and the lid. Electronics housing, characterized in that the. 2. The fixing device according to claim 1, wherein the rotation restricting portion is fixed to one of a contact surface of the connector with the bearing and a contact surface of the bearing with the connector. A piece is provided, a contact surface of the bearing body with the connector, and a contact surface of the connector with the bearing body on the other contact surface on which the fixed piece is not provided. A notch for accommodating the fixed piece is provided so that the fixed piece can be moved along with opening and closing, and the housing and the lid are opened and closed by contact of the fixed piece with a wall surface of an end of the notch. 2. The electronic circuit housing according to claim 1, wherein the amount is limited. 3. After the shaft is inserted through the insertion hole, a detachment preventing member for preventing the shaft from falling out of the insertion hole is attached to one of the connector and the bearing. The electronic circuit housing according to claim 1 or 2, wherein: