JP2009253051A - Structure for attaching and detaching case and fixed base - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for attaching and detaching a fixed base and a case in which the case is attached to and detached from the fixed base with one hand and the volume inside the case is enlarged. <P>SOLUTION: A structure for attaching and detaching a case 12 and a fixed base 13 is constituted of the fixed base 12 fixed on a fixed member and the case 13 attachable to and detachable from the fixed base, wherein an engage part 13A formed on one side of the case 13 is removably engaged with an engage part 12A correspondingly formed on one side of the fixed base 12, and an engage hole 13g formed on the other side of the case is formed so as to be removably engaged with a lock pawl 12g formed on the other side of the fixed base. Inside the engage hole 13g of the case, a disengaging means 15 is provided to separate the engage hole 13g from the lock pawl 12g. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a structure for attaching and detaching a case and a fixed base.

  For example, the housing of the module type controller that constitutes the control panel of the apparatus is composed of a fixed base fixed to a fixing member such as a DIN rail, and a cover that accommodates a control board inside and is detachably attached to the fixed base. Has been. In general, a plurality of such control panels are arranged side by side with a slight gap.

  Conventionally, as shown in FIG. 6, for example, a housing of such a module type controller is known. The housing 1 has a vertically long rectangular parallelepiped shape and is composed of a shallow box-shaped fixed base 2 and a deep box-shaped case 3 attached to the opening of the fixed base 2. The surface and both upper and lower surfaces are not stepped (hereinafter, referred to as flush).

  The fixed base 2 has a recess 2a ′ formed in the center of the back surface of the back plate 2a and is fitted to a fixing member such as a DIN rail (not shown) and can be locked by a locking claw 2a ″. A notch 2c is formed at the opening end of the lower part (one side), and an opening end on the lower side of the notch 2c protrudes upward in a substantially semicircular shape to form a protrusion 2d for engagement. The notched portion 2c and the projecting portion 2d form a lower (one side) engaging portion 2A on the fixed base 2 side, and the upper (other side) upper plate 2e has a distal end portion. A locking claw (snap fit claw) 2g is formed.

  The case 3 is formed with an engaging protrusion 3c that engages with the notch 2c of the fixed base 2 at the open end of the lower side (one side) of the side plates 3b, and the lower end thereof is notched downward. An engaging notch 3d that engages with the engaging protrusion 2d of the fixed base 2 is formed. The protrusion 3c and the notch 3d form a lower (one side) engaging portion 3A on the case side. An engaging hole 3g that can be attached to and detached from the engaging claw 2g of the fixed base 2 is formed at the tip of the upper (other side) upper plate 3e.

  When attaching the case 3 to the fixed base 2, the notch 3d at the lower part of the side plate 3b of the case 3 is engaged with the protrusion 2d at the lower part of the two side plates 2b of the fixed base 2, and this is used as a fulcrum. 2 is rotated in the counterclockwise direction indicated by the arrow CC, and the engaging claw 2g of the upper plate 2e of the fixed base 2 is engaged with the engagement hole 3g of the upper plate 3e of the case 3 to engage the case with the fixed base 2. 3 is fixed. The protrusion 3d of the case 3 engages with the notch 2d of the fixed base 2 so that the side surfaces are flush.

  When removing the case 3 from the fixed base 2, the lower surface of the case 3 is supported by one hand (not shown), and is provided near the base of the locking claw 2 g of the fixed base 2 with the fingertip of the other hand, for example, the index finger. The pressed portion 2h is pushed to release the engagement between the locking claw 2g and the engagement hole 3g of the case 3 as indicated by a dotted line. Next, the case 3 is rotated in the forward direction (clockwise) indicated by the arrow C as shown in FIG. 7 and pulled out with the protrusion 2d of the fixed base 2 and the notch 3d of the case 3 as fulcrums. Next, the notch 3 d of the case 3 is removed from the protrusion 2 d of the fixed base 2, and the case 3 is removed from the fixed base 2. In this way, the case 3 can be attached and detached.

  Alternatively, as shown in FIG. 8, an engagement hole 2i is formed in the upper plate 2e of the fixed base 2, and a locking claw (snap fit claw) 3i is formed at the corresponding tip of the upper plate 3e of the case 3. There are also things. When the case 3 is mounted on the fixed base 2, the locking claw 3 i of the case 3 is engaged with the engagement hole 2 i of the fixed base 2.

  When removing the case 3 from the fixed base 2, the lower surface of the case 3 is supported by one hand (not shown), and the other hand, for example, the fingertip of the index finger is provided at the base of the locking claw 3 i of the case 3. The portion 3h is pressed to lower the locking claw 3i, and the engagement with the engagement hole 2i of the case 2 is released. Next, as shown in FIG. 9, the case 3 is rotated in the front direction indicated by the arrow C and pulled out with the protrusion 2 d of the fixed base 2 and the notch 3 d of the case 3 as fulcrums. Next, the notch 3 d of the case 3 is removed from the protrusion 2 d of the fixed base 2, and the case 3 is removed from the fixed base 2.

In addition, as a structure for attaching the housing (case) to the fixed base, after aligning the rear upper part of the housing and the upper front part of the fixed base, the housing is fixed to the fixed base by pushing in so as to rotate from below. What has been proposed has also been proposed (see, for example, Patent Document 1).
Japanese Patent Laid-Open No. 2000-222007 (page 3, FIG. 4)

  By the way, in the attachment / detachment structure of the case 3 and the fixed base 2 shown in FIG. 6 above, the case 3 is supported with one hand when the case 3 is removed, and the pressing part 2h of the fixed base 2 is pushed with the other hand. Since the case 3 is removed, both hands are required for the removal operation, and the workability is poor. In particular, in a configuration in which a plurality of housings are arranged side by side and an operator cannot put a fingertip between adjacent side surfaces, the surfaces exposed to the outside (upper and lower sides and front surface shown in FIG. 6). ) Can only be pressed. For this reason, it is necessary to operate with both hands to attach and detach the fixed base 2 and the case 3.

  Further, in the structure for attaching and detaching the case 3 and the fixed base 2 shown in FIG. 8 described above, an extra space is required to form the locking claw 3i at the tip of the upper plate 3e of the case 3. In addition, since the case 3 is a molded product that is larger (deeper) than the fixed base 2, a die-cutting angle (taper) of the mold is necessary, and a locking claw 3i is formed at the tip of the upper plate 3e. Therefore, there is a problem that the thickness of the upper plate 3e is increased, and accordingly, the internal space of the case 3 is narrowed, and the area of the control board that can be mounted in the case 3 is reduced.

  Moreover, in the module type controller described in Patent Document 1, there is no disclosure about a detachable structure between the fixed base and the housing (case).

  An object of the present invention is to provide a fixed base and case attaching / detaching structure that allows the case to be attached to and detached from the fixed base with one hand and that can increase the volume inside the case.

In order to solve the above-described problem, a structure for attaching and detaching the case and the fixing base according to claim 1 of the present invention is as follows.
An engaging portion formed of a fixing base fixed to the fixing member and a case removable from the fixing base, wherein an engaging portion formed on one side of the case is formed corresponding to one side of the fixing base A case and a fixed base which are detachably engaged with each other, and an engagement hole formed on the other side of the case is detachably engaged with a locking claw formed on the other side of the fixed base. In the detachable structure of
An engagement release means for releasing the engagement between the engagement hole and the locking claw is provided in the engagement hole of the case.

  The engaging portion formed on one side of the case is engaged with the engaging portion formed on one side of the fixed base fixed to the fixing member, and the engaging claw formed on the other side of the fixed base engages the case. The engaging hole formed on the other side is engaged. This attaches the case to the fixed base. When the case is removed from the fixed base, the engagement between the locking claw of the fixed base and the engagement hole of the case is released by the engagement release means provided in the engagement hole of the case. Then, after removing the other side of the case from the other side of the fixed base, the engagement between the one-side locking portion of the case and the one-side locking portion of the fixed base is released, and the case is removed from the fixed base.

Moreover, the attachment / detachment structure of the case and the fixed base according to claim 2 of the present invention is the attachment / detachment structure of the case and the fixed base according to claim 1,
The locking claw is formed outwardly at the tip of a bendable tongue-shaped support portion formed on the other side of the fixed base and formed narrower than the support portion.
The disengaging means is
A bendable tongue-shaped support portion provided in the engagement hole, the base end portion of which is connected to the end surface of the engagement hole on the side facing the distal end of the locking claw;
A notch formed at the front end of the support portion so as to surround both sides and the front end of the locking claw;
It consists of a pressing part formed so that the peripheral part of the cutout part protrudes outward from the outer peripheral surface of the engagement hole,
By pressing the pressing portion, the plate surfaces of the support portions on both sides of the locking claw are pressed to release the engagement between the locking claw and the engagement hole.

  When the pressing part of the disengaging means of the case is pushed, the tongue-like support part curves inward, and the inner side surfaces on both sides of the notch at the tip are both sides of the locking claw of the tongue-like support part of the fixed base Press the plate. Along with this, the tongue-like support portion of the fixed base is bent inward, and the locking portion at the tip is released from the fitting hole of the case. The notch is formed so as to surround both sides and the front end of the locking claw, that is, the rear end side of the locking claw is open, so that both sides of the notch are plates on both sides of the locking claw of the support part. It is possible to get out of the locking claw while pressing the surface. Thereby, the engagement between the locking claw of the fixed base and the engagement hole of the case can be released.

Moreover, the attachment / detachment structure of the case and the fixed base according to claim 3 of the present invention is the attachment / detachment structure of the case and the fixed base according to claim 1,
The locking claw has a concave portion that protrudes outward at the tip of a bendable tongue-shaped support portion formed on the other side of the fixed base and opens toward the tip at a substantially center of the outer surface. Provided,
The disengaging means is
A bendable tongue-shaped support portion that is provided in the engagement hole and formed so as to be connected to the end surface of the engagement hole on the side facing the distal end of the locking claw;
A convex portion formed on the inner surface of the tip of the support portion so as to engage with the concave portion of the locking claw;
The outer surface corresponding to the convex portion of the support portion comprises a pressing portion formed so as to protrude outward from the outer peripheral surface of the engagement hole,
The engagement with the engagement hole is released by pushing the locking claw through the convex portion by the pressing portion.

  When the pressing portion of the case disengaging means is pressed, the tongue-shaped support portion is bent inward and the convex portion engaged with the concave portion of the locking claw presses the locking claw of the fixed base. Along with this, the tongue-like support portion of the fixed base is bent inward, and the locking portion is released from the fitting hole of the case. Since the concave portion of the locking claw is open toward the tip, the convex portion of the case can come out of the concave portion while pressing the concave portion of the locking claw. Thereby, the engagement between the locking claw of the fixed base and the engagement hole of the case can be released.

  According to the present invention, the case attached to the fixed base can be attached and detached with one hand, the handling becomes easy, and the workability is improved. Further, there is no extra space necessary for forming the locking claws, the volume inside the case can be increased, and the area of the substrate mounted in the case can be increased. Also, the structure is simple.

  Hereinafter, a detachable structure of a case and a fixed base according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a housing of a modular controller to which a case / fixing base attaching / detaching structure according to the present invention is applied. As shown in the figure, the housing 11 is a vertically long and thin rectangular parallelepiped box, and includes a shallow box-shaped fixed base 12 and a deep box-shaped case 13. The both side surfaces and upper and lower surfaces of the fixed base 12 and the case 13 are flush with each other. The fixed base 12 and both side plates 12b and 13b of the case 13, the upper plates 12e and 13e, and the lower plates 12f and 13f are flush with each other. In FIG. 1, the fixed base 12 and the lower part of the case 13 are on one side and the upper part is on the other side.

  The fixed base 12 has a recess 12a 'formed in the center of the back surface of the back plate 12a and is fitted to a fixing member such as a DIN rail (not shown) and can be locked by a locking claw 12a "shown in FIG. A notch 12c is formed at the open end of the lower part (one side) of both side plates 12b, and the lower open end of the notch 12c protrudes upward in a substantially semicircular shape, and the projecting part 12d for engagement. An engagement portion 12A on the lower side (one side) of the fixed base 12 is formed by the cutout portion 12c and the projection portion 12d.

  A locking claw (snap fit claw) 12g is formed at the center position of the tip of the upper plate (the other end plate) 12e of the fixed base 12. Further, the case 13 has an engagement hole 13g formed at the tip of an upper plate (the other end plate) 13e corresponding to the locking claw 12g of the fixed base 12, and the case 13 has an engagement hole 13g. Engagement release means 15 for releasing engagement with the locking claw 12g is integrally formed.

  As shown in FIG. 2, the locking claw 12g of the fixed base 12 is formed on the upper surface of the front end portion of the support portion 12h formed so as to protrude forward as indicated by a dotted line at the approximate center position of the opening end surface of the upper plate 12e. Yes. The width of the support portion 12h is about 1/3 of the width of the upper plate 12e, and the width of the locking claw 12g is slightly narrower than the width of the support portion 12h. A flat plate portion 12h ′ is formed. Further, the rear end surface of the locking claw 12g rises perpendicularly from the plate surface of the support portion 12h, and both side portions 12g 'are inclined downward in a tapered shape from the upper end surface toward the front end. Further, a recess 12g "between the side portions 12g 'is a recess that opens in the distal direction.

  As shown in FIGS. 2 and 3, the support portion 12 h is formed so that the base end portion is positioned slightly inward from the opening end surface and is recessed by the thickness of the upper plate 13 e of the case 13, and is formed on both sides from the opening end surface. A slit 12i is formed up to the vicinity of the back plate 12a. Accordingly, the support portion 12h has a tongue-like shape and can be bent inward. The height of the locking claw 12g is the same as or slightly lower than the plate thickness of the upper plate 13e of the case 13.

  As shown in FIG. 1, the case 13 has an engaging protrusion 13c that engages with the notch 12c of the fixed base 12 at the opening end of the lower end of the left and right side plates 13b, and the lower end of the case 13 faces downward. An engagement notch 13d that is notched and engages with the engagement protrusion 12d of the fixed base 12 is formed. The engagement protrusion 13c and the notch 13d form a lower (one side) engagement portion 13A of the case 13. An engaging hole 13g that can engage with the locking claw 12g of the fixed base 12 is formed in the vicinity of the tip of the upper plate 13e.

  The engagement hole 13g of the case 13 is slightly wider than the width of the support portion 12h of the fixed base 12 and is a long hole extending along the upper plate 13e, and has substantially the same width as the support portion 12h of the fixed base 12 inside. A tongue-shaped support portion 13h is provided. As shown in FIGS. 2 and 3, the support portion 13h has a slightly thinner plate thickness than the upper plate 13e, and a rear end surface 13g ′ whose base end portion opposes the front end of the locking claw 12g of the fitting hole 13g. The front end portion faces the front end surface 13g ″ of the engagement hole 13g with a slight gap. Thereby, the support portion 13h is easily bent inward (inward). Then, a substantially square C-shaped cutout portion 13i that opens at the front end portion of the support portion 13h so as to face the front end face 13g ″ of the engagement hole 13g, and the left and right sides and the rear side of the cutout portion 13i are surrounded. In this manner, a pressing portion 13j that is substantially square C-shaped and slightly protrudes upward from the upper surface of the upper plate 13e is formed. That is, the pressing portion 13j protrudes outward from the outer peripheral surface of the engagement hole 13g.

  The notch 13i is sized so that both sides and the tip of the locking claw 12g can enter with a slight gap, and the rear end surface of the locking claw 12g of the fixed base 12 is the engagement hole 13g. The front end face 13g "can be engaged. And, the disengaging means for releasing the engagement between the locking claw 12g and the engaging hole 13g by the support portion 13h, the notch portion 13i, and the pressing portion 13j. 15 is formed.

  A tip portion 13k corresponding to the support portion 12h of the fixed base 12 of the upper plate 13e of the case 13 is formed so as to protrude from the opening end surface to a position where it contacts the base portion of the support portion 12h. Thereby, the opening end surface of the upper plate 12e of the fixed base 12 and the opening end surface of the upper plate 13e of the case 13 can be contacted without a gap, and the upper plate 12e of the fixed base 12 and the upper plate 13e of the case 13 are in contact with each other. Become one.

  By forming the locking claw 12g of the fixed base 12 and the locking portion 13g of the case 13 in this shape, an extra space is not necessary. In addition, the mold drawing gradient of the mold of the case 13 can be reduced, and accordingly, the plate thickness of the upper plate 13e of the case 13 can be reduced. As a result, the volume inside the case 13 can be increased. Is possible.

  The fixed base 12 and the case 13 are integrally formed of a synthetic resin member such as polycarbonate. Accordingly, the tongue 12 of the fixed base 12 and the tongue 13 of the case 13 are both elastic and bendable. A control board (not shown) is mounted in the case 13. In this way, the housing 11 is formed. A plurality of the housings 11 are arranged on the control panel with a slight gap.

  When attaching the case 13 to the fixed base 12, as shown in FIG. 4, the operator grasps the upper part of the case 13 with one hand (not shown), for example, the right hand, to the lower protrusions 12c of the left and right side plates 12b of the fixed base 12. The notch 13d is engaged with the protrusion 12d while the notch 13c at the lower part of the left and right side plates 13b of the case 13 is fitted. Next, the case 13 is rotated in the counterclockwise direction indicated by the arrow CC toward the fixed base 12 using this engaging portion as a fulcrum, and the upper surface (tapered) of the locking claw 12g of the upper plate 12e of the fixed base 12 ( The upper plate 13e of the case 13 is pressed against the outer surface.

  Along with this, the support portion 12h is curved and the upper surface of the locking claw 12g enters the engagement hole 13g while sliding on the inner side surface (lower surface) of the upper plate 13e. Then, the support portion 12h of the fixed base 12 returns to the original state, and the rear end surface of the locking claw 12g is locked to the front end surface 13g "of the engagement hole 13g. Fixed.

  When removing the case 13 from the fixed base 12, the operator applies the fingertip of one hand (not shown) such as the index finger of the right hand to the pressing portion 13j protruding from the plate surface of the upper plate 13e of the case 13 shown in FIG. Push. Accordingly, the support portion 13h of the case 13 is curved inward (inner side), and both side portions of the inner side surface (lower surface) of the notch portion 13i shown in FIG. 2 are both sides of the locking claws 12g of the support portion 12h of the fixed base 12. The flat plate portion 12h ′ is pressed inward (inner side). As a result, the support portion 12h is curved and the engagement claw 12g is disengaged from the engagement hole 13g of the case 13.

  Next, the front side (front part) of the upper plate 13e and the lower plate 13f of the case 13 is sandwiched between the index finger and the thumb of the right hand, and the protrusions 12d of the left and right side plates 12b of the fixed base 12 and the left and right sides of the case 13 The engaging portion of the plate 13c with the notch 13d is pivoted to the near side (clockwise) indicated by the arrow C in FIG. At this time, since the pressing portion 13j protrudes from the plate surface of the upper plate 13e, the fingertip is caught and the case 13 can be easily rotated. Further, the notch 13i of the case 13 has a front end facing the front end surface 13g "of the engagement hole 13g, so that it does not interfere with the rear end surface of the locking claw 12g. Get out.

  Next, while the case 12 is lifted obliquely upward on the near side, the engagement between the lower protrusion 12 d of the fixed case 12 and the notch 13 d at the lower part of the case 13 is released. As a result, the case 13 can be easily detached from the fixed base 12 with one hand. In particular, a portion exposed when a plurality of housings 11 are arranged side by side with a slight gap, that is, upper claws 12e and 13e are provided with locking claws 12g, engagement holes 13g, and engagement release means 15. Accordingly, the fixed base 12 and the case 13 can be easily attached and detached.

  FIG. 5: shows the principal part enlarged view of 2nd Embodiment of the attachment / detachment mechanism of the case and fixed base which concerns on this invention. The same or corresponding members as those in FIG. In FIG. 5, a convex portion 13m that engages with a concave portion 12g "that opens to the front of the locking claw 12g shown in FIG. 2 is formed at a substantially central position on the inner surface (lower surface) of the tip portion of the support portion 13h of the case 13. A pressing portion 13n that protrudes outward (upward) from the plate surface is formed on the outer surface (upper surface) corresponding to the convex portion 13m of 13h.In this case, the locking claw 12g has the same width as the support portion 12h. Then, the disengaging means 15 ′ is formed by the support portion 13h, the convex portion 13m on the lower surface, and the pressing portion 13n.

  When removing the case 13 from the fixed base 12, the operator presses the fingertip of the index finger of one hand (not shown) such as the right hand against the pressing portion 13 n of the case 13 as described above. Along with this, the support portion 13h of the case 13 curves inward (inward) and presses the recess 12g "of the locking claw 12g of the fixed base 12. As a result, the locking claw 12g is pushed down and the case 13 is engaged. The engagement with the hole 13g is released, whereby the engagement between the locking claw 12g of the fixed base 12 and the engagement hole 13g of the case 13 can be released.

  Next, the front side (front part) of the upper plate 13e and the lower plate 13f (see FIG. 4) of the case 13 is sandwiched between the index finger and thumb of the right hand, and the protrusions 12d of the left and right side plates 12b of the fixed base 12 The case 13 is rotated to the near side with the engaging portion of the left and right side plates 13c of the case 13 engaging with the notched portion 13d. Since the concave portion 12g ″ of the locking claw 12g is open toward the tip, the convex portion 13m of the case 13 can come out of the concave portion 12g ″ while pressing the concave portion 12g ″ of the locking claw 12g. At this time, since the convex portion 13m protrudes from the plate surface of the upper plate 13e, the fingertip is caught and the case 13 can be easily rotated.

  Next, while the case 12 is lifted obliquely upward on the near side, the engagement between the lower protrusion 12 d of the fixed case 12 and the notch 13 d at the lower part of the case 13 is released. As a result, the case 13 can be easily detached from the fixed base 12 with one hand.

  As described above, according to the present invention, when the case is removed from the fixed base, the engagement claw of the fixed base and the engagement hole of the case are separated by the disengaging means provided in the engagement hole of the case. Release the engagement. Then, after removing the other side of the case from the other side of the fixed base, the engagement between the one-side locking portion of the case and the one-side locking portion of the fixed base is released, and the case is removed from the fixed base. Thereby, the operator can operate the attachment / detachment of the fixed base and the case with one hand, and the workability can be improved.

  In particular, even in a configuration in which a plurality of housings are arranged side by side and an operator cannot put a fingertip between adjacent side surfaces, the one side surface exposed to the outside and the other side surface (first In FIG. 1 of the first embodiment, the upper and lower surfaces of the case 13 can be sandwiched between the fingertips of one hand, so that the fixing base and the case can be attached and detached with one hand.

  Further, the locking claw is formed to be narrower than the support part, the notch part is formed at the tip of the support part of the disengaging means so as to surround both sides and the tip of the locking claw, and the peripheral part of the notch part is formed. A pressing portion is formed by projecting outward from the outer peripheral surface of the engagement hole. Then, by pressing the pressing portion, the locking claw can be removed from the engagement hole of the case, and the notch can be pulled out from the locking claw. Thereby, the engagement between the locking claw of the fixed base and the engagement hole of the case can be released, and the attachment and detachment of the fixed base and the case can be operated with one hand.

  In addition, a recess opening toward the tip is provided at the approximate center of the locking claw, and a convex portion that engages with the concave portion of the locking claw is formed on the inner surface of the tip of the support portion of the engagement release means. A corresponding outer surface is projected outward from the outer peripheral surface of the engagement hole to form a pressing portion. Then, by pressing the pressing portion, the convex portion pushes the locking claw, and accordingly, the support portion of the fixed base is bent inward and the locking portion is released from the fitting hole of the case. Since the concave portion of the locking claw is open toward the tip, the convex portion of the case can come out of the concave portion while pressing the concave portion of the locking claw. Thereby, the engagement between the locking claw of the fixed base and the engagement hole of the case can be released, and the attachment and detachment of the fixed base and the case can be operated with one hand.

  In the above description, the terms “upper” and “lower” related to the direction of gravity are used for the sake of brevity. The essence of the present invention is not impaired by the installation posture of the case and the fixed base with respect to the direction of gravity.

1 is a perspective view of a housing of a module type controller to which a first embodiment of a structure for attaching and detaching a case and a fixed base according to the present invention is applied. It is an expansion perspective view of the engaging part of the case and fixed base shown in FIG. It is a partially cutaway side view of the housing shown in FIG. It is explanatory drawing at the time of removing a case from the fixed base of the housing shown in FIG. It is an expansion perspective view of the engaging part of the case and fixed base which concern on 2nd Embodiment of the attachment or detachment structure of the case and fixed base which concern on this invention. It is a partially cutaway side view of a housing to which an example of a conventional case and fixed base attaching / detaching structure is applied. It is explanatory drawing at the time of removing a case from the fixed base shown in FIG. It is a partially cutaway side view of a housing to which another example of a conventional case and fixed base attaching / detaching structure is applied. It is explanatory drawing at the time of removing a case from the fixed base shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Housing 2 Fixed base 2A Engagement part 2a Back plate 2a 'Concave part 2a "Locking claw 2b Side plate 2c Notch part 2d Projection part 2e Upper plate 2g Locking claw 2h Press part 2i Engagement hole 3 Case 3A Engagement part 3b Side plate 3c engagement protrusion 3d notch 3e upper plate 3g engagement hole 3h pressing part 3i locking claw 11 housing 12 fixed base 12A engagement part 12a back plate 12a 'recess 12a "locking claw 12b side plate 12c notch 12d protrusion 12e upper plate 12f lower plate 12g locking claw 12g 'side portion 12g "recess 12h support portion 12h' flat plate portion 12i slit 13 case 13A engagement portion 13b side plate 13c engagement protrusion 13d notch portion 13e upper plate 13f lower plate 13g 13g 'rear end face 13g "front end face 13h support part 13i notch part 13j pressing part 13k tip part 13m convex part 13n Pressure section 15, 15 'disengaging means

Claims (3)

An engaging portion formed of a fixing base fixed to the fixing member and a case removable from the fixing base, wherein an engaging portion formed on one side of the case is formed corresponding to one side of the fixing base A case and a fixed base that are detachably engaged with each other, and an engagement hole formed on the other side of the case is detachably engaged with a locking claw formed on the other side of the fixed base. In the detachable structure of
An attachment / detachment structure for a case and a fixed base, wherein an engagement release means for releasing the engagement between the engagement hole and the locking claw is provided in the engagement hole of the case. The locking claw is formed outwardly at the tip of a bendable tongue-shaped support portion formed on the other side of the fixed base and formed narrower than the support portion.
The disengaging means is
A bendable tongue-shaped support portion provided in the engagement hole, the base end portion of which is connected to the end surface of the engagement hole on the side facing the distal end of the locking claw;
A notch formed at the front end of the support portion so as to surround both sides and the front end of the locking claw;
It consists of a pressing part formed so that the peripheral part of the cutout part protrudes outward from the outer peripheral surface of the engagement hole,
The case according to claim 1, wherein pressing the pressing portion pushes the plate surfaces of the support portions on both sides of the locking claw to release the engagement between the locking claw and the engagement hole. And the mounting structure of the fixed base. The locking claw has a concave portion that protrudes outward at the tip of a bendable tongue-shaped support portion formed on the other side of the fixed base and opens toward the tip at a substantially center of the outer surface. Provided,
The disengaging means is
A bendable tongue-shaped support portion that is provided in the engagement hole and formed so as to be connected to the end surface of the engagement hole on the side facing the distal end of the locking claw;
A convex portion formed on the inner surface of the tip of the support portion so as to engage with the concave portion of the locking claw;
The outer surface corresponding to the convex portion of the support portion comprises a pressing portion formed so as to protrude outward from the outer peripheral surface of the engagement hole,
2. The case / fixed base attaching / detaching structure according to claim 1, wherein the pressing portion pushes the locking claw through the convex portion to release the engagement with the engaging hole.

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