JP6491692B2 - Circuit board housing case and electronic device - Google Patents

Description

  The present invention relates to a circuit board housing case in which a circuit board is housed, and an electronic device in which the circuit board is housed in such a circuit board housing body.

  In a circuit board housing case in which a circuit board is housed, wiring may be fixed by a band member called a binding band or the like. As a technique for fixing wiring to such a circuit board housing case, a pair of openings are provided in the wall surface of the circuit board housing case, and a band member is inserted into the opening portion in a zigzag manner, thereby accommodating the circuit board. A technique for fixing a wiring by attaching a band member to the housing and winding the band member around the wiring is known (for example, see Patent Documents 1 and 2).

Japanese Utility Model Publication No. 3-17679 JP 2008-153490 A

  The band member attached to the circuit board housing case as described above can be used for fixing the circuit board housing case itself by winding it around a fixing member such as a rod-like column member. However, when the opening is provided on the wall surface of the circuit board housing case and the band member is attached as described above, it is difficult to improve the sealing property of the housing.

  In view of the above-mentioned points, the present invention enhances the sealing performance of the housing or attaches the band member when the circuit board housing housing is fixed to the fixing member by the band member attached to the circuit board housing housing. It is intended to be able to make it easier.

To achieve the above objective,
The present invention
A housing main body for accommodating the circuit board;
A circuit board housing case comprising: a band member attaching portion to which a band member for fixing the housing main body portion to a fixing member is attached;
The band member mounting portion is
A central locking piece protruding from the side wall of the housing body,
In the vicinity of both sides of the central locking piece in a direction parallel to the bottom wall of the housing body, a predetermined distance is arranged in the direction perpendicular to the bottom wall with respect to the central locking piece, A pair of both-end side locking pieces protruding from the side wall of the housing main body, and a pair of protruding tip portions of the center-side locking piece and the protruding tip portions of the both-end locking pieces, respectively. Having a locking piece connecting portion,
A chamfered portion is formed on each of the both end side locking pieces in the vicinity of the center side locking piece,
The shortest distance between each of the chamfered portions and the central locking piece is a predetermined distance in a direction perpendicular to the bottom wall between the central locking piece and the pair of both end locking pieces. It is characterized by being set longer.

  Thereby, since the band member attachment part which has the center side locking piece which protrudes from the side wall of a housing | casing main-body part as mentioned above, and a pair of both-ends side locking piece is provided, the sealing property of a housing | casing is provided. Can be easily increased. Further, a chamfered portion is formed on each end-side locking piece, and the shortest distance between each chamfered portion and the center-side locking piece is a center-side locking piece and a pair of both-end-side locking pieces. Is set to be longer than a predetermined distance in the direction perpendicular to the bottom wall between the two and the band member can be easily inserted between the center side locking piece and one of the both side locking pieces. . Further, it is possible to easily insert the inserted band member between the other end side locking piece and the center side locking piece. Moreover, the band member once inserted between the both end side locking pieces and the center side locking pieces is difficult to drop off. Therefore, fixing work for fixing the circuit board housing case to the fixing member can be facilitated.

  According to the present invention, when the circuit board housing case is fixed to the fixing member by the band member attached to the circuit board housing case, the sealing property of the housing is improved or the band member can be easily attached. can do.

It is a perspective view which shows the structure of a housing | casing. It is a top view which shows the structure of a housing | casing. It is a bottom view which shows the structure of a housing | casing. It is a front view which shows the structure of a housing | casing. It is a longitudinal cross-sectional view which shows the structure of a housing | casing. It is a rear view which shows the structure of a housing | casing. FIG. 5 is an enlarged end view showing a detailed configuration of a band member attaching portion 111. It is a fragmentary sectional view which shows the structure of a band member. It is an enlarged end view which shows the detailed structure of the band member attaching part 111 of a modification. It is an enlarged end view which shows the detailed structure of the band member attaching part 111 of another modification. It is an expanded end view which shows the detailed structure of the band member attaching part 111 of another modification. Furthermore, it is an expanded end view which shows the detailed structure of the band member attaching part 111 of another modification.

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

  For example, a circuit board housing case 100 of an electronic device used for controlling each part of an automobile has a housing body 101 and a cover 102 as shown in FIG. It has become so. The method for fixing the housing main body 101 and the cover 102 is not particularly limited. For example, the casing main body 101 and the cover 102 are fixed by fastening with screws 211 through the screw holes 102 a of the cover 102.

  As shown in FIGS. 2 to 4, three band member attachment portions 111 are provided on the three side walls 101 a of the housing main body 101 at portions near the bottom wall 101 b. By inserting a band member 310 (FIG. 8), which will be described later, through the band member mounting portion 111, the housing body 101 can be fixed to a fixing member (not shown). Here, the names of the side wall 101a and the bottom wall 101b do not necessarily correspond to the horizontal direction or the vertical direction in the physical space, but the wall on the fixing member side to which the circuit board housing case 100 is fixed. Is called a bottom wall 101b, and a wall perpendicular or substantially perpendicular thereto is called a side wall 101a. Of the four side walls 101a of the housing main body 101, the side wall 101a not provided with the band member mounting portion 111 is connected to a wiring connector 121 to a circuit board as shown in FIG. 123 is provided.

  More specifically, as shown in FIG. 6, the band member attaching portion 111 includes a center side locking piece 112 projecting from the side wall 101a, a pair of both end side locking pieces 113, and the center side locking piece 112. And a pair of locking piece connecting portions 114 that connect the protruding tip portions of the both end side locking pieces 113 respectively, and an insertion opening 115 surrounded by these is formed. The both end side locking pieces 113 are arranged near both sides in the direction parallel to the bottom wall 101b with respect to the central side locking piece 112. Further, as shown in FIG. 7, the center side locking piece 112 is disposed with a predetermined distance A in a direction perpendicular to the bottom wall 101b. A chamfered portion 113a is formed in a portion of each end side locking piece 113 adjacent to the center side locking piece 112, and the shortest distance between each of the chamfered portions 113a and the center side locking piece 112. B is set to be longer than the distance A between the center side locking piece 112 and the both end side locking pieces 113. More specifically, the distance A is shorter than the dimension t in the thickness direction of the band portion 311 of the band member 310 used to fix the housing body 101 to the fixing member, and the distance B is , It is set to be longer than the dimension t.

  The central locking piece 112 may be provided with a screw hole 112a so that the circuit board housing case 100 can be fixed to the fixing member by a screw instead of the band member 310.

  The band member 310 attached to the band member attaching part 111 has a band part 311 and a lock part 312 having an insertion hole 313 through which the band part 311 is inserted, for example, as shown in FIG. Yes. A locking claw 314 having a locking part 315 is formed on the inner surface of the insertion hole 313. By engaging a small unevenness (not shown) of the band portion 311 with the locking claw 314, it is possible to prevent the band portion 311 inserted through the insertion hole 313 from moving in the direction of coming out. . In addition, the bending part 311a may be formed in the front-end | tip part of the band part 311 in the side curved when inserting in the penetration hole 313. FIG.

  In the circuit board housing case 100 as described above, for example, each band member 310 is attached to each band member attachment portion 111 (the band member attachment portion 111 on the left and right side in FIG. 2) opposed to each other. Can be fixed by winding the wire around a fixing member such as a wire harness or a rod-shaped column member. Further, the band member 310 is attached to the band member attaching portion 111 (the band member attaching portion 111 on the lower side in FIG. 2) disposed at the position facing the connectors 121 to 123 and wound around the fixing member. The connected wire harness can be fixed by being bound to the fixing member by the band member 310. The degree of freedom of the fixing method as described above can be increased by providing the three band members 310 as described above. However, the present invention is not limited to this. Only one of the band member mounting portion 111 disposed at a position facing the disposed band member mounting portion 111 or the connectors 121 to 123 may be provided.

  Here, the band member mounting portion 111 has a chamfered portion 113 a formed on one of the pair of both-end side locking pieces 113, and the shortest distance B between the band-side mounting piece 111 and the central side locking piece 112 is By setting the length longer than the dimension t of the band portion 311, the band member 310 can be easily inserted into the one insertion opening 115. Further, since the chamfered portion 113 a is formed on the other end side locking piece 113, the band member 310 inserted into the one insertion opening 115 can be easily inserted into the other insertion opening 115. it can. Moreover, since the center side locking piece 112 and the both end side locking pieces 113 are provided with a step so that the distance A opens in a direction perpendicular to the bottom wall 101b, the size of the chamfered portion 113a ( Even if the angle and length are relatively small, the band member 310 can be easily inserted as described above. Further, since the distance A is set to be shorter than the dimension t of the band portion 311 of the band member 310, the band member 310 once inserted into both the insertion openings 115 is difficult to drop off. Therefore, for example, by first inserting the band part 311 through the insertion opening 115 and attaching the band member 310 to the band member attaching part 111 in a place with good workability, and then fixing the band member 310 to the fixing member. Even when the work space for fixing to the fixing member is narrow, the fixing work can be facilitated.

  In addition, if the dimension and arrangement | positioning of each part are set so that the chamfer 113a in the other insertion opening 115 may be located on the exact extension line of the band member 310 inserted in one insertion opening 115, the band member 310 However, considering the bending of the band member 310 and the case where the work can be performed while pressing the tip of the band member 310 somewhat, the setting of the distances A and B and the chamfering are at least as described above. If the portion 113a is formed, workability can be improved.

(Modification)
As described above, the chamfered portion 113a is not limited to the both-end-side locking piece 113, and the chamfered portion 112b is also formed on the central-side locking piece 112 as shown in FIG. Also good. Accordingly, the distance C between the chamfered portion 113a and the chamfered portion 112b is set to be longer than the distance B when only the chamfered portion 113a as shown in FIG. Can be easily inserted.

  For example, as shown in FIG. 10, the band member 310 inserted into the insertion opening 115 is formed with a frictional force increasing portion 112 c due to, for example, unevenness on the surface on the both end side locking piece 113 side of the center side locking piece 112. The workability may be further improved by making it more difficult to drop off.

  Further, as shown in FIG. 11, the center side locking piece 112 ′ may be formed of a material different from that of the both end side locking pieces 113, or the surface may be coated to increase the frictional force. .

  Further, as shown in FIG. 12, the length of the center side locking piece 112 may be shorter than the distance between the both end side locking pieces 113 in the direction perpendicular to the bottom wall 101b. This also makes it easier to insert the band member 310 more easily.

  Although the angle and length of the chamfered portion 113a can be variously set, generally, the smaller the angle formed between the chamfered portion 113a and the bottom wall 101b, the smaller the angle of the band member 310 inserted into one insertion opening 115. The tip can be easily inserted into the other insertion opening 115.

  In addition, when the shape and arrangement | positioning of the center side latching piece 112 and the both end side latching pieces 113 are formed symmetrically as mentioned above, workability | operativity is the point that there is no directionality in the insertion operation of the band member 310. Although it is easy to improve, it is not restricted to this, You may give directionality to insertion of the band member 310 by making these shapes and / or arrangement | positioning asymmetric.

  In addition, by forming the band member mounting portion 111 by the center side locking piece 112 protruding from the side wall 101a and the both end side locking pieces 113 as described above, it is possible to easily improve the sealing performance of the housing. Even when the casing main body 101 itself does not have high sealing performance, it is possible to easily improve the workability of fixing the circuit board housing 100 by providing the band member mounting portion 111 as described above. .

DESCRIPTION OF SYMBOLS 100 Circuit board housing | casing 101 Case main-body part 101a Side wall 101b Bottom wall 102 Cover part 102a Screw hole 111 Band member attaching part 112 Center side latching piece 112 'Center side latching piece 112a Screw hole 112b Chamfering part 112c Friction force Increasing portion 113 Both-end side locking piece 113a Chamfered portion 114 Locking piece coupling portion 115 Insertion opening 121-123 Connector 211 Screw 310 Band member 311 Band portion 311a Bending portion 312 Locking portion 313 Insertion hole 314 Locking claw 315 Locking portion

Claims (10)

A housing main body for accommodating the circuit board;
A circuit board housing case comprising: a band member attaching portion to which a band member for fixing the housing main body portion to a fixing member is attached;
The band member mounting portion is
A central locking piece protruding from the side wall of the housing body,
In the vicinity of both sides of the central locking piece in a direction parallel to the bottom wall of the housing body, a predetermined distance is arranged in the direction perpendicular to the bottom wall with respect to the central locking piece, A pair of both-end side locking pieces protruding from the side wall of the housing main body, and a pair of protruding tip portions of the center-side locking piece and the protruding tip portions of the both-end locking pieces, respectively. Having a locking piece connecting portion,
A chamfered portion is formed on each of the both end side locking pieces in the vicinity of the center side locking piece,
The shortest distance between each of the chamfered portions and the central locking piece is a predetermined distance in a direction perpendicular to the bottom wall between the central locking piece and the pair of both end locking pieces. The band member set to be longer than the band member mounting portion is configured to be fixed only by contact between the center side locking piece and the both end side locking pieces. A circuit board housing case. The circuit board housing case according to claim 1,
The shortest distance between each of the chamfered portions and the center side locking piece is set longer than the thickness dimension of the band member,
A predetermined distance in a direction perpendicular to the bottom wall between the center side locking piece and the pair of both end side locking pieces is set to be shorter than a thickness dimension of the band member. A circuit board housing case. The circuit board housing case according to any one of claims 1 to 2,
A circuit board housing case, wherein a chamfered portion is formed in a portion of the center side locking piece adjacent to each of the both end side locking pieces. The circuit board housing case according to any one of claims 1 to 3,
In the center side locking piece, a surface in a direction parallel to the bottom wall of the housing main body on the both end side locking pieces is formed so that a friction coefficient is larger than that of other surface portions. A circuit board housing case. The circuit board housing case according to any one of claims 1 to 4,
The circuit board housing case, wherein the center side locking piece is formed of a material different from that of the both end side locking pieces. The circuit board housing case according to any one of claims 1 to 5,
The circuit board housing case, wherein a length of the center side locking piece in a direction parallel to the bottom wall of the housing body is set shorter than a distance between the both side locking pieces. . The circuit board housing case according to any one of claims 1 to 6,
The circuit board housing case, wherein the band member mounting portion is provided on each side wall facing each other in the housing body portion. The circuit board housing case according to any one of claims 1 to 6,
A wiring connector connected to a circuit board accommodated in the housing main body is provided on a side wall of the housing main body opposite to the side wall provided with the band member mounting portion. A circuit board housing case. The circuit board housing case according to any one of claims 1 to 6,
The band member mounting portion is provided on the three-direction side wall among the four-direction side walls of the housing body, and is connected to the circuit board accommodated in the housing body on the other one-side wall. A circuit board housing case characterized in that a wiring connector is provided. The circuit board housing case according to any one of claims 1 to 9,
A circuit board housed in the housing body,
An electronic device comprising:

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