JP2016146432A - Housing case for electric apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a housing case for electric apparatus capable of suppressing the breaking of a flexible hook.SOLUTION: A housing case for electric apparatus includes a case body 2 provided with a locked portion 4 and housing an electric apparatus, a cover 5 having a flexible hook 6 provided with a locking portion 7, a snap-fit mechanism 8 for mounting the cover 5 on the case body 2 by hooking the locking portion 7 to the locked portion 4 by using flexibility of the flexible hook 6 and bringing about the locked state, and a deflection restricting portion 9 for restricting the deflection amount when deflecting the flexible hook 6 in a direction for releasing the locked state of the locked portion 4 and locking portion 7.SELECTED DRAWING: Figure 4

Description

  The present invention relates to an electrical device storage case, and more particularly to an electrical device storage case provided with a cover attached to a case body by a snap-fit mechanism.

  As a storage case for an electric device, for example, a case provided with a cover for the purpose of protecting an external connection conductor portion (charging portion) disposed on a case body from being touched by an operator is known. Patent Document 1 discloses a technique in which a cover attached to a case main body of an electromagnetic contactor is configured in a box shape to prevent an operator from contacting the external connection conductor. Japanese Patent Application Laid-Open No. H10-228561 also discloses a technique for attaching a cover to a case body by a snap-fit mechanism. This snap-fit mechanism attaches the cover to the case body by hooking the tip (locking part) of the hook provided on the cover to the nail (locked part) of the case body using its flexibility. Is configured to do.

Japanese Patent Laid-Open No. 6-36663

By the way, in the snap fit mechanism using the flexibility of the hook as in the cited document 1, the hook is bent with a tool such as a minus screwdriver in a direction to release the hooked state (locked state) between the hook and the claw. Thus, the cover can be easily removed from the case body.
However, if the amount of bending of the hook that bends in the direction to release the locked state is large, the hook may be broken and the cover may be damaged. Hook breakage becomes prominent when the hook is long. Moreover, if the amount of bending of the hook is small, it becomes difficult to successfully release the hooked state between the hook and the claw.
An object of the present invention is to provide a storage case for an electric device capable of suppressing breakage of a flexible hook.

  In order to achieve the above object, a storage case for an electric machine according to one aspect of the present invention includes a case main body that includes a locked portion and that stores an electrical device, and a flexible hook that includes a locking portion. A snap fit mechanism that attaches the cover to the case body by hooking the locking portion to the locked portion by using the flexibility of the flexible hook, and the locked A bending restricting portion for restricting the amount of bending when the flexible hook is bent in the direction in which the locking state between the portion and the locking portion is released.

  ADVANTAGE OF THE INVENTION According to this invention, the storage case for electric devices which can suppress breakage | flexibility of a flexible hook can be provided.

It is a perspective view which shows schematic structure of the storage case for electrical devices which concerns on the 1st Embodiment of this invention. FIG. 2 is a perspective view showing a state in which the cover is removed from the case body and inverted in the electrical device storage case of FIG. 1. It is a top view of the case main body shown in FIG. It is sectional drawing which shows the state which positioned the cover in the case main body in the electrical equipment storage case which concerns on the 1st Embodiment of this invention. It is principal part sectional drawing to which the area | region enclosed with the dotted line of FIG. 4 was expanded. It is principal part sectional drawing which shows the latching state of a to-be-latched part and a latching | locking part. It is principal part sectional drawing which shows the state which bent the flexible hook in the direction which cancels | releases the latching state of a to-be-latched part and a latching | locking part. It is a perspective view of the electromagnetic contactor accommodated in the case main body of the storage case for electrical devices which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the state which removed the cover from the case main body in the storage case for electric devices which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the state which removed and reversed the cover from the case main body in the electrical equipment storage case which concerns on the 2nd Embodiment of this invention.

  Hereinafter, a storage case for an electric device according to first and second embodiments of the present invention will be described with reference to the drawings. In 1st and 2nd embodiment, although the storage case for electrical devices used for the assembly of an electromagnetic contactor is illustrated exemplarily as an electrical device, it is limited to the storage case for electrical devices used for the assembly of this electromagnetic contactor. Of course, it is not done.

In the following description of the first and second embodiments and the accompanying drawings, the same reference numerals are given to the same components, and duplicate descriptions are omitted. Further, the attached drawings described in the first and second embodiments are not drawn with an accurate scale and dimensional ratio for easy understanding and understanding. The present invention is not limited to the description of the first and second embodiments described below unless it exceeds the gist.
In the following first and second embodiments, the first and second directions orthogonal to each other in the same plane are defined as an X direction and a Y direction, respectively, and a third orthogonal to the first direction and the second direction is defined. Is defined as the Z direction.

(First embodiment)
As shown in FIGS. 1 to 5, the electrical device storage case 1 according to the first embodiment of the present invention is provided with a locked portion 4 (see FIGS. 4 and 5) and is illustrated as an electrical device. 8 includes a case main body 2 that houses the electromagnetic contactor 3 shown in FIG. 8, and a cover 5 having a flexible hook 6 provided with a locking portion 7 (see FIGS. 2, 4, and 5).

In addition, the electrical device storage case 1 according to the first embodiment uses the flexibility of the flexible hook 6 to hook the locking portion 7 to the locked portion 4 to be in the locked state. A snap fit mechanism 8 for attaching the cover 5 to the case body 2 is provided.
Moreover, the electrical equipment storage case 1 according to the first embodiment has a bending amount when the flexible hook 6 is bent in a direction in which the locked state between the locked portion 4 and the locked portion 7 is released. A bending restricting portion 9 (see FIGS. 4 and 5) for restricting is provided. In addition, the electrical equipment storage case 1 according to the first embodiment has a cover positioning projection 17 (see FIGS. 4 and 4) that positions the cover 5 with respect to the case body 2 when the cover 5 is attached to the case body 2. (See FIG. 5).

  The case main body 2 is mainly composed of a top wall rectangular box-shaped upper case 15 whose bottom part is opened and a bottomed wall rectangular box-like lower case 11 whose top part is opened. Although not shown in detail, in the assembly process of the electromagnetic contactor 3, the electromagnetic contactor 3 is accommodated in a cavity formed by the upper case 15 and the lower case 11. 1 to 4 show a state in which the electromagnetic contactor 3 is housed in the case main body 2.

As shown in FIG. 8, the electromagnetic contactor 3 mainly includes a contact portion 31 and a movable plunger that is disposed so as to overlap the contact portion 31 and is connected to the movable contact of the contact portion 31 via a connecting shaft. It is comprised with the electromagnet unit 35 provided with the electromagnetic coil 37 to drive.
Although not shown in detail, the contact portion 31 includes a pair of contacts, a cylindrical body 32 that houses the pair of contacts with the inside being an arc extinguishing chamber, and an insulating plate 33 that closes the upper portion of the cylindrical body 32. ing. Two through holes are formed in the insulating plate 33, and a pair of external connection conductor portions (charging portions) 34 are fixed through the through holes. The pair of contacts are a pair of fixed contacts provided on a pair of fixed contacts fixed to the external connection conductor portion 34 in the arc extinguishing chamber, and a movable contact disposed so as to be movable in the Z direction of FIG. A pair of movable contacts provided on the child and arranged to face each other so as to come into contact with the pair of fixed contacts.

  Although not shown in detail, the electromagnet unit 35 is disposed on a magnetic yoke 36 having a U-shaped cross section with an open top, an upper magnetic yoke bridged in an upper opening of the magnetic yoke 36, and a bottom plate of the magnetic yoke. A spool provided with a central opening by winding the electromagnetic coil 37, and a movable plunger movably disposed in the axial direction of the central opening of the spool and biased by a return spring. The movable contact of the part 31 is supported by a connecting shaft fixed to the movable plunger of the electromagnet unit 35. The electromagnet unit 35 has a coil terminal 38 connected to the electromagnetic coil 37. The coil terminal 38 is provided on the side plate of the magnetic yoke 36, and when the electromagnetic contactor 3 is housed in the case body 2, the case body is exposed from the case body 2 as shown in FIGS. 2 is arranged outside.

  The lower case 11 and the upper case 15 are formed by molding an insulating synthetic resin. As shown in FIGS. 1 to 4, the lower case 11 includes four side walls 11a, 11b, 11c, and 11d that constitute the outer peripheral side wall, and a bottom wall 11e that connects the four side walls 11a, 11b, 11c, and 11d. And has a bottomed wall rectangular box shape with the upper side facing the bottom wall 11e open. The side wall 11a and the side wall 11b are disposed to face each other in the X direction, and the side wall 11c and the side wall 11d are disposed to face each other in the Y direction.

  Each of the side wall 11a and the side wall 11b of the lower case 11 is provided with an attachment flange 12 for attaching the case main body 2 to an attachment portion such as a control panel. Although not shown, the side wall 11a of the lower case 11 is provided with a cutout recess into which the coil terminal 38 of the electromagnet unit 35 shown in FIG. 8 is inserted, so that the coil terminal 38 enters the cutout portion. The coil contact 38 is disposed outside the case body 2 by incorporating the electromagnetic contactor 3 into the case body 2.

As shown in FIGS. 1 to 4, the upper case 15 has a two-stage structure having a convex portion at the center of the top wall. Specifically, the upper case 15 includes four lower-stage side walls 15a ₁ , 15b ₁ , 15c ₁ , 15d ₁ constituting the lower outer peripheral side wall, and the four lower-stage side walls 15a ₁ , 15b ₁ , 15c ₁ , 15d ₁ Are connected to the lower stage top wall 15e ₁ , the four upper stage side walls 15a ₂ , 15b ₂ , 15c ₂ , 15d ₂ connected to the lower stage top wall 15e ₁ and constituting the upper stage outer peripheral side wall, and the four upper stage side walls 15 a ₂ , 15 b ₂ , 15 c ₂ , 15 d ₂ connected to the upper stage top wall 15 e ₂ , and the top wall rectangular box opened on the lower side facing the lower stage top wall 15 e ₁ and the upper stage top wall 15 e ₂ It consists of a shape. In the lower side wall, the lower side wall 15a ₁ and the lower stage side wall 15b ₁ are arranged to face each other in the X direction, and the lower stage side wall 15c ₁ and the lower stage side wall 15d ₁ are arranged to face each other in the Y direction. In the upper side wall, the upper side wall 15a ₂ and the upper stage side wall 15b ₂ are arranged to face each other in the X direction, and the upper stage side wall 15c ₂ and the upper stage side wall 15d ₂ are arranged to face each other in the Y direction.

In the upper case 15, the upper top wall 15e _2, when receiving the electromagnetic contactor 3 to the case body 2, a pair of external connecting conductor part 34 of the electromagnetic contactor 3 is exposed from the case main body 2 through 2 Two conductor part through holes 18 are provided. Further, the upper top wall 15e ₂ is provided with a partition protrusion 19 that extends and protrudes so as to partition the two conductor portion through holes 18.

Although not illustrated, the lower case 11 is provided with a case locking portion, and the upper case 15 is provided with a case locking portion. The upper case 15 can be attached and fixed (mounted) to the lower case 11 by locking the case locking portion to the case locking portion to be in the locked state.
As shown in FIGS. 1, 2 and 4, the cover 5 has a top plate portion 5a having a rectangular plane, and leg portions 5b provided at the corners of the top plate portion 5a. Yes. The leg portion 5b, the top plate together intersect two sides of 5a (long sides and short sides) respectively protrude in a direction perpendicular to the top plate 5a from the elongated first projecting plate portion 5b ₁ and the second The protruding plate portion 5b ₂ is formed in an L shape connected along the protruding direction. In the first embodiment, the flexible hook 6 is constituted by the leg portion 5b of the cover 5, and the locking portion 7 of the flexible hook 6 is the second protruding plate portion as shown in FIGS. is composed of a projection provided so as to protrude toward the outside of the second projecting plate portion 5b ₂ on one end side of 5b ₂ (nails).

The cover 5 is made of, for example, a polycarbonate (PC) resin having excellent flexibility, and the two flexible hooks 6 facing in the X direction are easily bent inward (holding direction) by the gripping force of the operator. It has the flexibility to be able to hold.
In the cover 5, as shown in FIG. 2, a fitting recess 5 c into which the partition projection 19 of the case body 2 is fitted when the cover 5 is attached to the case body 2 is provided on the back surface side of the top plate portion 5 a. Is provided.

In the upper case 15, as shown in FIGS. 1 to 5, one end side of the flexible hook 6 provided on the cover 5 is inserted into the lower top wall 15 e ₁ when the cover 5 is attached to the case body 2. A hook insertion hole 16 is provided. The hook insertion holes 16 are provided to face the number of the flexible hooks 6 of the cover 5, and four hook insertion holes 16 are provided in the first embodiment. Further, the hook insertion hole 16 has a horizontally long shape corresponding to the shape of the locking portion 7.

In the first embodiment, the locked portion 4 is constituted by an edge portion 16a in a hook insertion hole 16 provided in the case body 2 as shown in FIG. In other words, although only shown one of the lower side wall 15c ₁ side in FIG. 5, the locked portion 4 protrudes made from a portion of the lower top wall 15e _1, and from the lower side wall _15c 1, 15d ₁ inside And a protrusion that terminates at the hook insertion hole 16.

  As shown in FIG. 6, the snap fit mechanism 8 inserts the flexible hook 6 of the cover 5 into the hook insertion hole 16 of the case main body 2, and the locked portion 4 and the locking portion 7 are inside the case main body 2. Are locked and become locked. Further, as shown in FIG. 7, the snap-fit mechanism 8 releases the locked state between the locked portion 4 and the locking portion 7 when the flexible hook 6 is bent inward of the case body 2. It is configured.

As shown in FIG. 7, the bending restricting portion 9 is flexible in the direction in which the locked state between the locked portion 4 of the case body 2 and the locking portion 7 of the cover 5 is released, that is, inside the case body 2. When the hook 6 is bent, the bent flexible hook 6 comes into contact with the bending restricting portion 9 to restrict the amount of bending of the flexible hook 6 and is configured by a part of the case body 2. . In the first embodiment, the deflection regulating portion 9 is configured by the upper side walls 15c ₂ and 15d ₂ of the upper case 15. Even if the bending restricting portion 9 bends the flexible hook 6 and releases the locked state between the locked portion 4 of the case body 2 and the locking portion 7 of the cover 5, the flexible hook 6 is broken. The amount of flexure of the flexible hook 6 is regulated so as not to occur.

When the locking portion 7 is locked to the locked portion 4, the cover positioning projection 17 is flexible together with the deflection regulating portion 9 inside the flexible hook 6 as shown in FIGS. 5 and 6. It is arranged at a position facing the hook 6. The cover positioning projection 17 is positioned above the deflection regulating portion 9 and located on the flexible hook 6 side from the deflection regulating portion 9. In the first embodiment, the cover positioning protrusions 17 are provided on the upper side walls 15 c ₂ and 15 d ₂ of the upper case 15.

As shown in FIGS. 4 and 5, the cover 5 is attached (attached) to the case body 2 by placing the cover 5 on the upper top wall 15 e _{2 of} the case body 2 and then covering the case body 2. 5 is moved to insert the locking portion 7 of the flexible hook 6 into the hook insertion hole 16 of the case body 2 as shown in FIG. When the cover 5 is attached, the engaging portion 7 of the flexible hook 6 has an inclined surface. When the inclined surface comes into contact with the edge 16a of the hook insertion hole 16, the flexible hook 6 Bends inward. Thereafter, the inclined surface is inserted into the hook insertion hole 16 and the locking portion 7 penetrates the hook insertion hole 16, so that the flexure of the flexible hook 6 is eliminated and the locked portion 4 of the case body 2. The locking portion 7 of the flexible hook 6 is locked to the top.

  As shown in FIG. 7, the cover 5 is detached (detached) from the case body 2 by bending the flexible hook 6 with the gripping force of the operator inside the flexible hook 6 to lock the case body 2. The locking state between the portion 4 and the locking portion 7 of the flexible hook 6 is released, and then the flexible hook 6 is bent from the hook insertion hole 16 of the case body 2 with the flexible hook 6 being bent. This is done by moving the cover 5 in the direction of extracting one end side. When the cover 5 is removed, the amount of bending of the flexible hook is restricted by the flexible hook coming into contact with the bending restricting portion.

Next, effects of the electrical device storage case 1 according to the first embodiment of the present invention will be described.
The electrical equipment storage case 1 according to the first embodiment regulates the amount of bending when the flexible hook 6 is bent in the direction in which the locked state between the locked portion 4 and the locking portion 7 is released. A deflection regulating portion 9 is provided. The bending restricting portion 9 is configured to restrict the amount of bending of the flexible hook 6 when the flexible hook 6 comes into contact therewith. Therefore, according to the electrical equipment storage case 1 according to the first embodiment, even if the flexible hook 6 is bent and the locked state between the locked portion 4 and the locked portion 7 is released, the flexible case 6 is flexible. Since the bending amount of the flexible hook 6 can be restricted by the bending restricting portion 9 so that the flexible hook 6 is not broken, the breaking of the flexible hook 6 can be suppressed.

  The electrical device storage case 1 according to the first embodiment includes a cover positioning projection 17 that positions the cover 5 on the case body 2. Therefore, according to the electrical equipment storage case 1 according to the first embodiment, the cover 5 can be easily positioned on the case body 2 by the cover positioning projection 17, and the cover 5 is attached to the case body 2. The backlash between the case main body 2 and the cover 5 can be reduced.

  In the electrical equipment storage case 1 according to the first embodiment, the case body 2 has the conductor portion through-hole 18 through which the external connection conductor portion 34 of the electromagnetic contactor 3 is exposed when the electromagnetic contactor 3 is stored. Have. The cover 5 is attached to the case body 2 at a position covering the through hole 18 for the conductor part. Therefore, according to the electrical equipment storage case 1 according to the first embodiment, after the electromagnetic contactor 3 is stored in the case body 2, the external connection conductor 34 is protected by the cover 5 so that the operator does not touch it. can do.

  In the electrical device storage case 1 according to the first embodiment, the cover 5 includes a top plate portion 5a having a rectangular plane, and leg portions 5b provided at each corner of the top plate portion 5a. doing. And the flexible hook 6 is comprised by the leg part 5b. Therefore, according to the electrical equipment storage case 1 according to the first embodiment, the snap-fit mechanism 8 can be provided corresponding to each leg 5b, so that the cover 5 can be stably attached to the case body 2. Can do.

Moreover, the force which bends the flexible hook 6 can be adjusted by changing the length of the leg part 5b.
Note that the cover 5 may be attached to the case body 2 by bending the flexible hook 6 with the gripping force of the operator, as in the case of removing the cover 5. In this case, even if the flexible hook 6 is bent and the locking portion 7 is locked to the locked portion 4, the bending amount of the flexible hook 6 is bent so that the flexible hook 6 is not broken. Since it can regulate by regulation part 9, breakage of flexible hook 6 can be controlled.

(Second Embodiment)
The electrical device storage case 1A according to the second embodiment of the present invention has substantially the same configuration as the electrical device storage case 1 according to the first embodiment, but the configuration of the cover 5 is different. .
That is, in the electrical device storage case 1 according to the first embodiment, the flexible hook 6 is configured by the leg portion 5 b of the cover 5. On the other hand, in the electrical equipment storage case 1A according to the second embodiment, the flexible hook 6 is configured independently of the leg portion 5b of the cover 5A.

  In the electrical equipment storage case 1A according to the second embodiment, the cover 5A includes a top plate portion 5a having a rectangular plane, leg portions 5b provided at each corner of the top plate portion 5a, And a flexible hook 6 provided at the edge of the plate portion 5a. The flexible hooks 6 are provided to face each other on the two long sides facing each other of the top plate portion 5a. And this flexible hook 6 is comprised by the elongate protrusion board part which protrudes in the orthogonal | vertical direction with respect to the top-plate part 5a from the center part of the long side of the top-plate part 5a similarly to 1st Embodiment. Has been. And the latching | locking part 7 of the flexible hook 6 is comprised by the processus | protrusion (claw) provided in the one end side of the protrusion board part so that it might protrude toward the outer side of a protrusion board part. And the hook insertion hole 16 of the upper case 15 is provided in two places corresponding to the flexible hook 6, and the snap fit mechanism 8 is also provided in two places.

Also in the electrical device storage case 1A according to the second embodiment configured as described above, the same effects as those of the electrical device storage case 1 according to the first embodiment described above can be obtained.
The present invention has been specifically described above based on the first and second embodiments. However, the present invention is not limited to the first and second embodiments and does not depart from the gist of the present invention. Of course, various changes can be made in the range.

  For example, in the first and second embodiments described above, the storage case for an electrical device that stores an electromagnetic contactor as the electrical device has been described. However, the present invention is not limited to this, and for example, an electrical device such as a relay. The present invention can be applied to a storage case for electrical equipment that stores equipment.

DESCRIPTION OF SYMBOLS 1 ... Electrical equipment storage case 2 ... Case main body 3 ... Electromagnetic contactor (electric equipment)
4 ... Locked part 5 ... Cover, 5a ... Top plate part, 5b ... Leg part, 5b ₁ , 5b ₂ ... Projection plate part, 5c ... Fitting recess 6 ... Flexible hook 7 ... Locking part 8 ... Snap fitting mechanism 9 ... deformation preventing portion 11 ... lower case 11a, 11b, 11c, 11d ... side wall 11e ... bottom wall 12 ... mounting flange 12a ... screw insertion hole 15 ... upper case _{15a 1, 15b 1, 15c 1} , 15d 1 ... lower Side wall 15e ₁ ... Lower stage top wall 15a ₂ , 15b ₂ , 17c ₂ , 17d ₂ ... Upper stage side wall 15e ₂ ... Upper stage top wall 16 ... Hook insertion hole 16a ... Edge part 17 ... Cover positioning protrusion 18 ... Conductor part through hole DESCRIPTION OF SYMBOLS 19 ... Partitioning projection part 31 ... Contact part 32 ... Cylindrical body 33 ... Insulating substrate 34 ... External connection conductor part 35 ... Electromagnet unit 36 ... Magnetic yoke 37 ... Electromagnetic coil 38 ... Coil terminal

Claims (9)

A case main body provided with a locked portion and containing an electrical device;
A cover having a flexible hook provided with a locking portion;
A snap-fit mechanism that attaches the cover to the case body by hooking the locking portion to the locked portion using the flexibility of the flexible hook,
A bending restricting portion for restricting a bending amount when the flexible hook is bent in a direction to release the locked state between the locked portion and the locking portion;
A storage case for electrical equipment, comprising:   When the flexible hook is bent in the direction in which the locked state between the locked portion and the locking portion is released, the bent flexible hook is deformed by the bending limiting portion. The storage case for an electric device according to claim 1, wherein the storage case is configured to be a part of the case main body so as to regulate a bending amount of the flexible hook by contacting the flexible hook.   The snap fit mechanism is configured such that the flexible hook is inserted into a hook insertion hole provided in the case main body, and the locked portion and the locking portion are locked inside the case main body. The electrical equipment storage case according to claim 2, wherein the electrical equipment storage case is provided. The locked portion is configured by an edge portion in the hook insertion hole of the case body,
The electric device storage case according to claim 3, wherein the locking portion is formed by a protrusion provided on the flexible hook.   The snap-fit mechanism is configured to release the locking state between the locking portion and the locked portion by bending the flexible hook to the inside of the case body. The electrical device storage case according to claim 4. The cover includes a top plate portion having a rectangular plane, and leg portions provided at each corner of the top plate portion,
The storage case for an electric device according to any one of claims 1 to 5, wherein the flexible hook includes the leg portion.   The cover includes a top plate portion having a square plane, leg portions provided at corner portions of the top plate portion, and the flexible hook provided at an edge of the top plate portion. The storage case for an electric device according to any one of claims 1 to 5, wherein The case body has a through hole for a conductor part that exposes a conductor part for external connection of the electric device when the electric device is stored,
The electrical device storage case according to any one of claims 1 to 5, wherein the cover is attached to the case body at a position covering the through hole for the conductor portion. A positioning projection for positioning the cover on the case body;
The positioning protrusion is disposed at a position facing the flexible hook together with the deflection regulating portion inside the flexible hook when the locked portion is locked to the locking portion. The electrical equipment storage case according to claim 1, wherein the electrical equipment storage case is provided.

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