JP6503770B2 - Storage case for electrical equipment - Google Patents

Description

  The present invention relates to a storage case for an electric device, and more particularly to a storage case for an electric device provided with a cover mounted on a case body by a snap fit mechanism.

  Among the storage cases for electric devices, for example, those having a cover for the purpose of protecting an operator from touching the external connection conductor portion (charging portion) disposed in the case main body are known. Patent Document 1 discloses a technique for forming a cover to be attached to a case body of an electromagnetic contactor in a box shape to prevent an operator's contact with the external connection conductor. Further, Patent Document 1 also discloses a technique for attaching a cover to a case body by a snap fit mechanism. This snap-fit mechanism mounts the cover on the case body by hooking the tip (locking portion) of the hook provided on the cover to the claw (locking portion) of the case body using its flexibility. It is configured to

Unexamined-Japanese-Patent No. 6-36663

By the way, in the snap fit mechanism using flexibility of the hook as in Patent Document 1, the hook is bent with a tool such as a minus screwdriver in the direction to release the hooked state (locked state) of the hook and the hook. 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 of releasing the locked state is large, the hook may be broken, which may cause a problem such as breakage of the cover. Hook breakage is noticeable in the case of long hooks. In addition, when the amount of deflection of the hook is small, it becomes difficult to properly release the hook and the hook.
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, the storage case for an electric machine according to one aspect of the present invention is provided with a locked portion, and a flexible hook provided with a case main body for storing an electric device and a locking portion. A snap-fit mechanism for attaching the cover to the case main body by hooking the locking portion to the locked portion using the flexibility of the flexible hook and setting it in the locked state; And a deflection restricting portion that restricts an amount of deflection when the flexible hook is bent in a direction to release the locked state between the portion and the locking portion.

  According to the present invention, it is possible to provide a storage case for an electric device capable of suppressing breakage of the flexible hook.

It is a perspective view which shows schematic structure of the storage case for electric devices which concerns on the 1st Embodiment of this invention. In the storage case for electric devices of FIG. 1, it is a perspective view which shows the state which removed and reversed the cover from the case main body. It is a top view of the case main body shown in FIG. The storage case for electric devices which concerns on the 1st Embodiment of this invention WHEREIN: It is sectional drawing which shows the state which positioned the cover in the case main body. It is principal part sectional drawing which expanded the area | region enclosed with the dotted line of FIG. It is principal part sectional drawing which shows the locked state of a to-be-locked 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 locked state of a to-be-locked part and a latching | locking part. It is a perspective view of the electromagnetic contactor stored in the case main body of the storage case for electric devices which concerns on the 1st Embodiment of this invention. The storage case for electric devices which concerns on the 2nd Embodiment of this invention WHEREIN: It is a perspective view which shows the state which removed the cover from the case main body. The storage case for electric devices which concerns on the 2nd Embodiment of this invention WHEREIN: It is a perspective view which shows the state which removed and reversed the cover from the case main body.

  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 the first and second embodiments, a storage case for an electric device used for assembling an electromagnetic contactor will be described as an example of an electric device. However, the storage case for an electric device used for assembling this electromagnetic contactor is limited Of course not.

In the following description of the first and second embodiments and the accompanying drawings, the same components are denoted by the same reference numerals and redundant description will be omitted. Also, the accompanying drawings described in the first and second embodiments are not drawn to scale for clarity or comprehension. The present invention is not limited to the descriptions of the first and second embodiments described below, as long as the gist of the present invention is not exceeded.
In the following first and second embodiments, the first and second directions orthogonal to each other in the same plane are defined as the X direction and the Y direction, respectively, and the third direction is orthogonal to the first direction and the second direction. Direction is defined as the Z direction.

First Embodiment
As shown in FIGS. 1 to 5, the storage case 1 for an electric device according to the first embodiment of the present invention is provided with a locked portion 4 (see FIGS. 4 and 5), and is shown as an electric device. A case body 2 for housing 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) are provided.

In addition, the storage case 1 for an electric device 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 make the locking state. A snap fit mechanism 8 for mounting the cover 5 on the case body 2 is provided.
Further, the storage case 1 for an electric device according to the first embodiment has a bending amount when the flexible hook 6 is bent in a direction to release the locked state of the locked portion 4 and the locking portion 7. It has a deflection restricting portion 9 (see FIGS. 4 and 5) for restricting. In addition, the storage case 1 for electric device according to the first embodiment has the cover positioning projection 17 (FIG. 4 and FIG. 4) for positioning the cover 5 with respect to the case body 2 when the cover 5 is mounted on the case body 2. See FIG. 5).

  The case body 2 mainly includes an upper case 15 having a rectangular box-like shape with an open top at the bottom, and a lower case 11 having a rectangular box shape with a bottom open at the top. Although not shown in detail, in the process of assembling the electromagnetic contactor 3, the electromagnetic contactor 3 is housed inside 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 the contact portion 31 and the movable plunger overlapping the contact portion 31 and connected to the movable contact of the contact portion 31 via the connecting shaft. It is comprised by the electromagnet unit 35 provided with the electromagnetic coil 37 to drive.
Although not shown in detail, the contact portion 31 has a pair of contacts, a cylindrical body 32 accommodating the pair of contacts with the inside as an arc-extinguishing chamber, and an insulating plate 33 closing 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 penetrate and are fixed to these 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 movably disposed in the Z direction in FIG. And a pair of movable contacts disposed opposite to the pair of fixed contacts so as to be in contact therewith.

  Although not shown in detail, the electromagnet unit 35 is disposed on a magnetic yoke 36 having a U-shaped cross section open at the top, an upper magnetic yoke bridged to the top opening of the magnetic yoke 36, and a bottom plate of the magnetic yoke. A spool provided with a central opening by winding an 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 portion 31 is supported by a connecting shaft fixed to the movable plunger of the electromagnet unit 35. Further, 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 main body 2, the case main body is exposed from the case main body 2 as shown in FIGS. Placed outside of 2.

  The lower case 11 and the upper case 15 are formed by molding an insulating synthetic resin. The lower case 11 is, as shown in FIGS. 1 to 4, a bottom wall 11e to which four side walls 11a, 11b, 11c and 11d constituting an outer peripheral side wall and the four side walls 11a, 11b, 11c and 11d are connected. And is formed in a bottomed-walled rectangular box shape whose upper side opposite to the bottom wall 11e is 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 sidewall 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 a mounting flange 12 for mounting the case body 2 to a mounting 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, and the coil terminal 38 is inserted into this cutout. The coil terminal 38 is disposed outside the case body 2 by incorporating the electromagnetic contactor 3 into the case body 2.

The upper case 15 has a two-step structure having a convex portion at the center of the top wall as shown in FIGS. 1 to 4. Specifically, the upper case 15, four lower side walls _15a constituting the peripheral side wall of the lower _1, 15b _1, 15c 1, and 15d _1, the four lower side walls _{15a 1, 15b 1, 15c 1} , 15d 1 And four upper side walls 15a ₂ , 15b ₂ , 15c ₂ , and 15d ₂ which are connected to the lower side upper wall 15e ₁ and which are connected to the lower side upper wall 15e ₁ and which constitute the outer side wall of the upper side _{15a 2, 15b 2, 15c 2} , 15d 2 has a upper top wall 15e ₂ coupled, Yuitadakikabe rectangular box in which the lower side is opened opposite to the lower top wall 15e ₁ and the upper top wall 15e ₂ It is composed of In the lower side wall, the lower side wall 15a ₁ and the lower side wall 15b ₁ are placed opposite each other in the X direction, the lower side wall 15c ₁ and the lower side wall 15d ₁ are disposed to face each other in the Y direction. Further, in the upper side wall, the upper side wall 15a ₂ and the upper side wall 15b ₂ are arranged opposite each other in the X direction, the upper side wall 15c ₂ and the upper side wall 15d ₂ are disposed to face each other in the Y direction.

In the upper case 15, when the electromagnetic contactor 3 is housed in the case main body 2 in the upper stage top wall 15 e ₂ , the pair of external connection conductor portions 34 of the electromagnetic contactor 3 penetrates and is exposed from the case main body 2 Two conductor portion through holes 18 are provided. Further, in the upper top wall 15e _2, partitioning projection 19 which to stretching and projects to partition the two conductor portions through hole 18 is provided.

Although not shown, the lower case 11 is provided with a case engaged portion, and the upper case 15 is provided with a case engaged 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 make the locking state.
As shown in FIGS. 1, 2 and 4, the cover 5 has a top plate 5a having a rectangular flat surface, and legs 5b provided at each corner of the top plate 5a. There is. The leg portion 5b is a long first projecting plate portion 5b ₁ and a second projecting portion 5b which respectively project in the vertical direction with respect to the top plate portion 5a from two sides (long side and short side) of the top plate portion 5a which intersect each other. projecting plate portions 5b ₂ are constituted by L-shaped connected along the protruding direction. In the first embodiment, the flexible hook 6 is composed of the leg 5b of the cover 5, and as shown in FIGS. 2 and 4, the locking portion 7 of the flexible hook 6 is the second projecting plate 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, polycarbonate (PC) resin having excellent flexibility, and the two flexible hooks 6 opposed in the X direction can be easily bent inward (in the sandwiching direction) by the gripping force of the operator. Has flexibility that can be
In the cover 5, as shown in FIG. 2, on the back surface side of the top plate portion 5a, when the cover 5 is attached to the case main body 2, the fitting concave portion 5c into which the partition projection 19 of the case main body 2 is fitted It is provided.

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

In the first embodiment, as shown in FIG. 5, the engaged portion 4 is configured by an edge portion 16 a of the hook insertion hole 16 provided in the case main body 2. 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 in 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 body 2, and the locked portion 4 and the locking portion 7 inside the case body 2. And are configured to be locked in a locked state. 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 bends to the inside of the case main body 2. Is configured.

As shown in FIG. 7, the deflection restricting portion 9 is flexible in the direction in which the locked state of 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 is configured to be a part of the case main body 2 so as to restrict the amount of bending of the flexible hook 6 by coming into contact with the bending restricting portion 9 . In the first embodiment, the deflection restricting portion 9 is configured by the upper side walls 15 c ₂ and 15 d ₂ of the upper case 15. The deflection restricting portion 9 causes the flexible hook 6 to break even when the flexible hook 6 is bent and the locked state of the locked portion 4 of the case main body 2 and the locking portion 7 of the cover 5 is released. The deflection amount 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 protrusion 17 is flexible along with the bending restricting portion 9 inside the flexible hook 6 as shown in FIGS. 5 and 6. It is disposed at a position facing the hook 6. The cover positioning projection 17 is positioned above the deflection restricting portion 9 and on the flexible hook 6 side of the deflection restricting portion 9. In the first embodiment, the cover positioning projections 17 are provided on the upper side walls 15 c ₂ and 15 d ₂ of the upper case 15.

The cover 5 is attached (mounted) to the case main body 2 by disposing the cover 5 on the upper stage top wall 15e ₂ of the case main body 2 as shown in FIG. 4 and FIG. 5 is moved, and as shown in FIG. 6, the locking portion 7 of the flexible hook 6 is inserted into the hook insertion hole 16 of the case body 2. In the attachment of the cover 5, the locking portion 7 of the flexible hook 6 has an inclined surface, so that the inclined surface contacts the edge portion 16 a in the hook insertion hole 16, thereby 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, whereby the bending of the flexible hook 6 is eliminated and the locked portion 4 of the case main body 2 The locking portions 7 of the flexible hooks 6 are locked to each other.

  The removal (detachment) of the cover 5 from the case main body 2 is performed by bending the flexible hook 6 inside the flexible hook 6 with the grip of the operator as shown in FIG. In the flexible hook 6 from the hook insertion hole 16 of the case main body 2 in a state in which the locking state of the portion 4 and the locking portion 7 of the flexible hook 6 is released and then the flexible hook 6 is bent This is performed by moving the cover 5 in the direction in which one end side is removed. When the cover 5 is removed, the amount of bending of the flexible hook is restricted by the contact of the flexible hook with the bending restricting portion.

Next, the effects of the storage case 1 for an electric device according to the first embodiment of the present invention will be described.
The storage case 1 for an electric device according to the first embodiment regulates the amount of bending when the flexible hook 6 is bent in the direction of releasing the locked state of the locked portion 4 and the locking portion 7. A deflection restricting portion 9 is provided. The deflection restricting portion 9 is configured to restrict the amount of deflection of the flexible hook 6 by the contact of the flexible hook 6. Therefore, according to the storage case 1 for an electric device according to the first embodiment, even if the flexible hook 6 is bent and the locked state between the locked portion 4 and the locking portion 7 is released, the flexibility is obtained. The bending amount of the flexible hook 6 can be restricted by the bending restricting portion 9 so that breakage of the sexing hook 6 does not occur, so that breakage of the flexible hook 6 can be suppressed.

  The storage case 1 for an electric device according to the first embodiment includes a cover positioning projection 17 for positioning the cover 5 on the case main body 2. Therefore, according to the storage case 1 for an electric device according to the first embodiment, the cover 5 can be easily positioned on the case main body 2 by the cover positioning projection 17 and the cover 5 is attached to the case main body 2 It is possible to reduce the play between the case body 2 and the cover 5 after.

  In the storage case 1 for electrical equipment according to the first embodiment, the case body 2 has the conductor through hole 18 where the external connection conductor 34 of the electromagnetic contact 3 is exposed when the electromagnetic contact 3 is stored. Have. Then, the cover 5 is attached to the case main body 2 at a position covering the conductor portion through hole 18. Therefore, according to the storage case 1 for an electric device according to the first embodiment, after the electromagnetic contactor 3 is stored in the case main body 2, the cover 5 protects the external connection conductor portion 34 so that the operator does not touch it. can do.

  In the storage case 1 for an electric device according to the first embodiment, the cover 5 has a top plate portion 5a having a rectangular flat surface, and a leg portion 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 storage case 1 for an electric device according to the first embodiment, the snap-fit mechanism 8 can be provided corresponding to each leg 5 b, so that the cover 5 can be stably attached to the case main body 2. Can.

Moreover, the force which bends the flexible hook 6 can be adjusted by changing the length of the leg 5b.
The attachment of the cover 5 to the case body 2 may be performed by bending the flexible hook 6 with the gripping force of the operator, as in the case of taking out the cover 5. In this case, the amount of bending of the flexible hook 6 is bent so that the flexible hook 6 is not broken even if the flexible hook 6 is bent and the locking portion 7 is locked to the locked portion 4 Since the restricting portion 9 can restrict, the breakage of the flexible hook 6 can be suppressed.

Second Embodiment
The storage case 1A for an electric device according to the second embodiment of the present invention has substantially the same configuration as the storage case 1 for an electric device according to the first embodiment, but the configuration of the cover 5 is different. .
That is, in the storage case 1 for an electric device 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 electric device storage case 1A according to the second embodiment, the flexible hook 6 is configured independently of the leg 5b of the cover 5A.

  In the storage case 1A for an electric device according to the second embodiment, the cover 5A includes a top plate 5a having a rectangular flat surface, legs 5b provided at each corner of the top plate 5a, and a top 5a. And a flexible hook 6 provided at the edge of the plate portion 5a. The flexible hooks 6 are provided to be opposed to each other on two mutually opposing long sides of the top plate 5a. Further, as in the first embodiment, this flexible hook 6 is constituted by a long projecting plate portion which protrudes in the vertical direction with respect to the top plate portion 5a from the central portion of the long side of the top plate portion 5a. It is done. And the latching | locking part 7 of the flexible hook 6 is comprised by the protrusion (nail) provided so that it might protrude toward the outer side of a protrusion board part at the one end side of a protrusion board part. The hook insertion holes 16 of the upper case 15 are provided at two locations corresponding to the flexible hooks 6, and two snap fit mechanisms 8 are also provided.

Also in the electric device storage case 1A according to the second embodiment configured as described above, the same effects as those of the electric device storage case 1 according to the first embodiment described above can be obtained.
As mentioned above, although this invention was concretely demonstrated based on the above-mentioned 1st and 2nd embodiment, this invention is not limited to the above-mentioned 1st and 2nd embodiment, It does not deviate from the summary. Of course, various changes can be made within the scope.

  For example, in the first and second embodiments described above, a storage case for an electric device that stores an electromagnetic contactor as an electric device has been described, but the present invention is not limited to this. It can apply to the storage case for electric devices which stores an apparatus.

1 ... storage case for electric equipment 2 ... case body 3 ... magnetic contactor (electric equipment)
4 ... locked part 5 ... cover, 5a ... top plate portion, 5b ... legs, _5b 1, _5b 2 _... projecting plate portion, 5c ... fitting recess 6 ... flexible hook 7 ... engaging portion 8 ... Snap Fit mechanism 9 ... deflection control 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 stage Side wall 15e ₁ ... lower end top wall 15a ₂ , 15b ₂ , 17c ₂ , 17d ₂ ... upper end side wall 15 e ₂ ... upper end top wall 16 ... hook insertion hole 16a ... edge portion 17 ... cover positioning projection 18 ... conductor portion through hole Reference Signs List 19 partition projection 31 contact portion 32 cylindrical body 33 insulating substrate 34 conductor portion for external connection 35 electromagnet unit 36 magnetic yoke 37 magnetic coil 38 coil terminal

Claims (8)

A case body provided with a locked portion and housing the electric device;
A cover having a flexible hook provided with a locking portion;
A snap-fit mechanism for attaching the cover to the case main body by hooking the locking portion to the locked portion using the flexibility of the flexible hook to bring it into a locked state;
A deflection restricting portion that restricts an amount of deflection when the flexible hook is bent in a direction for releasing a locked state of the locked portion and the locking portion;
Equipped with
The snap fit mechanism inserts the flexible hook into the hook insertion hole provided in the case main body from the cover side of the case main body along the longitudinal direction of the flexible hook, and The cover is mounted on the case body by locking the locked portion and the locking portion in the inside opposite to the cover side.
The storage case for an electric device , wherein the deflection restricting portion is configured by a side wall in the hook insertion hole of the case main body . The locked portion is constituted by an edge portion of the hook insertion hole of the case main body,
The storage case for an electric device according to claim 1, wherein the locking portion is configured by a protrusion provided on the flexible hook. The snap fit mechanism is characterized in that the flexible hook bends inward of the case main body to release the locked state between the locking portion and the locked portion. The storage case for electric devices according to claim 1 or 2. The cover has a top plate having a rectangular flat surface, and a leg provided at each corner of the top plate,
The said flexible hook is comprised with the said leg part, The storage case for electric devices in any one of the Claims 1 thru | or 3 characterized by the above-mentioned. The cover has a top plate having a rectangular flat surface, legs provided at each corner of the top plate, and the flexible hooks provided at an edge of the top plate. The storage case for electric devices according to any one of claims 1 to 3 , characterized in that The case body has a conductor portion through hole through which the external connection conductor portion of the electric device is exposed when the electric device is accommodated.
The storage case according to any one of claims 1 to 5, wherein the cover is attached to the case main body at a position covering the conductor portion through hole. It further comprises a positioning protrusion for positioning the cover on the case body,
The positioning projection is disposed at a position facing the flexible hook together with the deflection restricting portion inside the flexible hook when the locked portion is locked to the locking portion. A storage case for an electric device according to any one of claims 1 to 6 , characterized in that: A case body provided with a locked portion and housing the electric device;
A cover having a flexible hook provided with a locking portion;
A snap-fit mechanism for attaching the cover to the case main body by hooking the locking portion to the locked portion using the flexibility of the flexible hook to bring it into a locked state;
A deflection restricting portion that restricts an amount of deflection when the flexible hook is bent in a direction for releasing a locked state of the locked portion and the locking portion;
Positioning projections for positioning the cover on the case body;
Equipped with
The positioning protrusion is provided on the case main body, and the flexible hook is combined with the flexible regulating portion and the flexible hook when the locked portion is locked to the locking portion. A storage case for an electric device, wherein the storage case is disposed at a position opposite to the storage case.

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