JP4023685B2 - Fixture - Google Patents

Description

  The present invention relates to a fixture used to mount an electronic component, a cable, or the like on a chassis of an electronic device or the like, and more particularly to a fixture that can be easily detached from the surface side of the chassis.

  When assembling electronic equipment, it is necessary to attach electronic parts to an assembly board such as a panel, chassis, and board (hereinafter referred to as a chassis) and to arrange wiring parts such as cables in an extended manner. A fixing tool as a part for use is used. For example, when a flat cable is extended and arranged along the surface of the chassis, a fixture called a flat cable clamp for holding the flat cable in the chassis is used. An example of a conventional flat cable clamp (hereinafter referred to as FCC) is shown in FIG. In this FCC 1A, an L-shaped clamp piece 41 protrudes from one end on a base 40 having a width slightly larger than the width of the flat cable FC to be held, and an arrowhead provided at the tip of the clamp piece 41. A hook 42 is inserted between the support piece 43 provided on the other end side of the base 40 and the lock piece 44 and engaged therewith, and the flat cable FC is connected between the base 40 and the clamp piece 41. Hold.

Further, a fitting piece 46 having an arrowhead shape toward the proximal end is connected to the distal end portion of the post 45 projecting downward from the bottom surface of the base 40. In addition, the base 45 of the post 45 is formed with an elastic piece 47 that is spread like a wing so as to face the fitting piece 46. When the fitting piece 46 is inserted into the through hole provided in the chassis 2 from the surface side, both end portions of the fitting piece 46 are elastically reduced in diameter and pass through the through hole, and after passing, elastically return to expand the diameter. Thus, both end portions of the fitting piece 46 are fitted to the inner edge portion of the through hole. At this time, the elastic piece 47 is elastically contacted to the surface side of the chassis 2, and the engagement state between the fitting piece 46 and the through hole is maintained by this elastic contact force. As a result, the FCC 1A is fixed to the chassis 2. In addition, as a fixture provided with the fitting part of such a structure, there exist some which are described in patent document 1 as an electric wire bundle clamp, for example.
Japanese Patent Laid-Open No. 9-242936

  By the way, in recent years home appliances, office automation equipment, automobiles, and electronic devices are generally required to sell environmentally conscious products as a solution to environmental problems. For example, printed circuit boards and wirings embedded in electronic devices are used as electronic devices. It is required to be able to be dismantled from the chassis, panels, etc. In particular, when disassembling the wiring, it is desirable to remove the wiring and the FCC holding the wiring from the surface side of the chassis. However, in the conventional FCC 1A shown in FIG. 15, when the FCC 1A is removed from the chassis 2, it is necessary to reduce the diameter of the fitting piece 46 and pull it out from the through hole. The fitting piece 46 cannot be operated from the front surface side of the chassis 2 and must be operated from the rear surface side of the chassis 2. For this reason, the chassis 2 cannot be removed from the surface side, and the above-described removal-free request cannot be satisfied. In addition to this, there is a problem that the fitting piece 46 is small and difficult to grasp with a finger, so that the operation becomes extremely difficult. Also, this type of FCC has the back of the base fixed to the chassis with adhesive tape, but the work of peeling the adhesive tape is cumbersome and the adhesive tape remains attached to the chassis or FCC. There will be environmental problems.

  In response to such a problem, the applicant of the present application has proposed a fixing device in Japanese Patent Application No. 2003-27604 which can be easily detached from the surface side of the chassis. In this fixture, a clamping piece that fits from one direction to the inner edge of the hole provided in the chassis and clamps the inner edge, and engages with the inner edge of the hole to move the fixture in the opposite direction. It is possible to attach and detach the fixture with respect to the chassis only by operation from the front surface side of the chassis.

  The proposed fixture has a substantially L-shaped cantilever structure so that the sandwiching piece can be fitted to the inner edge of the hole from one direction, so that the sandwiching force of the chassis by the sandwiching piece is not always sufficient. In particular, in the case of a fixture that has a small clamping piece to reduce the size of the fixture, when an external force is applied in a direction that tilts the fixture relative to the chassis, the force is As a result, it is difficult to ensure stable clamping with the clamping pieces, and there are still points to be improved in terms of reliability.

  The object of the present invention is not only to enable easy removal from the front surface side of the chassis, but also to stabilize the fitting state by adopting a structure in which the substrate is sandwiched between the clamping plate and the elastic piece. To provide a fixture with high fixing strength.

The present invention provides a holding portion for holding a component with respect to a chassis, and a fitting that is provided integrally with the holding portion and that fits into a fitting hole provided in the chassis to fix the holding portion to the chassis. The fitting hole is formed in a rectangular shape or a T-shape with protrusions protruding inwardly on both side edge portions, and the fitting portion protrudes with a length greater than the plate thickness of the chassis. Post, a clamping plate which is provided at the tip of the post and has the same shape as the fitting hole through which the fitting hole can be inserted from the front surface side to the back surface side of the chassis, and the chassis provided at the base end portion of the post A pressing piece elastically abutting on the surface of the pressing piece and a locking / releasing piece provided in a part of the pressing piece, and the clamping plate inserted through the fitting hole in one direction along the rear surface of the chassis next to this and one end edge of the fitting hole slide direction of when it is slid toward the Contact with the rear surface of the chassis in a triangular arranged three of side edges meet, thereby clamping the edges of the three between the elastic pressure pieces, the opposite direction the locking and releasing piece to the sliding direction of the fitting hole It is the structure engaged with the edge part of this.

According to the present invention, the clamping plate is inserted into the fitting hole of the chassis, and the fixing plate is slid in one direction so that the clamping plate holds the edge of the fitting hole at a plurality of locations at the same time. The movement of the fixing tool in the opposite direction is locked by the locking / release piece, and the fixing by the clamping plate is performed. By releasing the locking / release piece from the engagement with the fitting hole and sliding the fixture in the opposite direction, the clamping by the clamping plate can be released and the fixture can be removed from the chassis. Thus, it is possible to easily perform the work of attaching the fixing tool and the work of detaching, and to easily disassemble the printed circuit board or wiring of the electrical product from the chassis, the panel, or the like as a solution to the environmental problem. In particular, the clamping plate is configured to clamp the chassis between the one end side edge portion on the sliding direction side of the fitting hole and the elastic piece at the three triangularly arranged side edge portions adjacent thereto. Even when an external force is applied, the fixture can be fixed in a stable state by so-called three-point support . In addition, since the locking / release piece is engaged with the edge of the fitting hole to which the holding plate is fitted, there is no need to provide an independent hole for locking / release in the chassis, and the chassis can be easily processed. It is.

  Next, Embodiment 1 of the present invention will be described with reference to the drawings. FIG. 1 is an external perspective view of a first embodiment in which a wire is held along a chassis as a fixture of the present invention, and FIG. 2 is a cutaway perspective view for explaining details of a part of a fitting portion. FIGS. 3A, 3B, 3C, and 3D are a front view, a right side view, a bottom view, and a cross-sectional view taken along line AA. In these drawings, the wire saddle 1 is composed of a holding portion 10 for holding a wire to be held along the chassis, and a fitting portion 20 for fixing the holding portion to the chassis 2. It is integrally formed by molding. The wire saddle 1 can be attached to or removed from the chassis 2 by fitting the fitting portion 20 into the fitting hole 3 provided in the chassis 2.

  The holding part 10 has a U-shaped part 11 that is substantially laterally oriented, and a pair of both ends of the opening of the U-shaped part 11 that opens to the side protrude in a tapered shape toward the inside. A retaining piece 12 is provided. A wire that does not appear in the drawing is inserted into the U-shaped portion 11 through the pair of retaining pieces 12, and after being inserted, the wires are separated from the holding portion 10 by the pair of retaining pieces 12. Is prevented.

  On the other hand, the fitting portion 20 has a post 21 with a short length projecting vertically downward from a substantially central position of the side located on the lower side of the holding portion 10. A clamping plate 22 oriented in the direction is integrally formed. In addition, a pair of wing-shaped elastic pieces 23A and 23B that are curved slightly downward toward both outer sides along the length direction of the U-shaped portion 11 are integrally formed at the base end portion of the post 21. Has been. A locking / releasing piece 24 is integrally formed at the tip of one elastic piece 23B.

  Further, as shown in FIG. 4, the fitting hole 3 provided in the chassis 2 has a rectangular shape with rounded corners as a whole, and is directed inward in the middle of the long sides on both sides. Thus, it is formed in a shape having a semicircular protrusion 31 protruding in a semicircular shape. In particular, the fitting hole 3 is also characterized in that it is formed line-symmetrically in both the vertical direction and the horizontal direction.

  The fitting part 20 will be described in detail. The sandwiching plate 22 has a thin plate shape with a thickness of about 1 mm and is formed in substantially the same planar shape as the fitting hole 3, and has a rectangular shape with rounded corners as a whole. Each intermediate portion has a concave portion 221 having a shape close to a semicircle toward the inside. The clamping plate 22 can be inserted through the fitting hole 3 in the thickness direction, and the post 21 is integrated at a position along one end side of the concave portions 221 on both sides. Therefore, both side surfaces 21 a of the post 21 are configured to be curved in an arc shape along the concave portion 221. Further, a locking wall 222 whose outer surface is rounded upward is erected upward at the opposite end of the clamping plate 21, and the post 21 is placed on the upper surface of the clamping plate 22. Reinforcing ribs 223 are formed extending from the locking wall 222 to the locking wall 222. These locking walls 222 and reinforcing ribs 223 can suppress deformation due to external force even when the sandwiching plate 22 is formed thin as described above.

  Further, an elastic piece 25 in the form of a tongue piece projecting obliquely downward from the base end portion of the post 21 is formed on one end side of the holding plate 22 so as to protrude. The elastic piece 25 is extended to a position where the lower end thereof is close to the upper surface of the clamping plate 22.

  The pair of elastic pieces 23A, 23B is formed such that the distance between both ends is slightly longer than the length of the fitting hole 3 in the longitudinal direction, and the tip of the elastic piece 23A on one end side contacts the surface of the chassis 2. It is formed as a contact portion 23a. The locking / release piece 24 provided at the tip of the opposite elastic piece 23B has a locking claw 241 protruding downward and a release knob 242 protruding upward, in particular a release knob 242. When the finger is operated with a finger, the tip of the elastic piece 23B can be elastically deformed upward.

  When the wire saddle 1 having the above configuration is attached to the chassis 2, the clamping plate 22 is inserted into the fitting hole 3 from the front surface side of the chassis 2 as shown in FIGS. At this time, both side surfaces 21 a of the post 21 curved in an arc shape are brought into contact with the semicircular protrusion 31 of the fitting hole 3, and at the same time, the locking wall 22 of the clamping plate 22 is opposed to the opposite edge of the fitting hole 3. By abutting on the portion, the clamping plate 22 can be positioned with respect to the fitting hole 3, and the clamping plate 22 can be easily inserted into the fitting hole 3. FIG. 6A shows a cross-sectional view taken along the line AA in FIG. Then, by further pressing the clamping plate 22 from the state where the tip portions of the elastic pieces 23A and 23B are in contact with the surface of the chassis 2, the upper surface of the clamping plate 22 is positioned on substantially the same surface as the rear surface of the chassis 2. become. Then, when the wire saddle 1 is slid in the one end side direction, the upper surface on one end side of the sandwiching plate 22 contacts the rear surface of the chassis 2 at the one end side edge of the fitting hole 3 as shown in FIG. At the same time, both side portions of the clamping plate 22 are in contact with the back surface of the semicircular protrusion 31. At this time, both side surfaces 21a of the post 21 and both side surfaces of the locking wall 222 are guided while being in contact with or close to the inner edge of the fitting hole 3, so that the sliding operation can be performed smoothly. Further, when the holding plate 22 is slid, the elastic piece 25 comes into contact with the edge of one end of the fitting hole 3 and is elastically deformed. At the same time, the holding piece 22 generates an elastic force in the opposite direction. . When the slid dimension reaches a predetermined dimension, as shown in FIG. 5 (d), the locking claw 241 provided on the elastic piece 23B falls on the opposite side of the fitting hole 3 and engages with the opposite edge. Match. A cross-sectional view taken along line AA in FIG. 4A at this time is shown in FIG.

  In this state, the pair of elastic pieces 23A and 23B elastically contact the surface of the chassis 2 and urge the clamping plate 22 upward. At the same time, the clamping plate 22 is denoted by reference symbol X in FIG. As shown in FIG. 3, the abutting portion is brought into contact with the rear surface of the chassis 2 at three positions, that is, an edge portion on one end side and semicircular protruding portions on both sides. Therefore, the chassis 2 is clamped in the plate thickness direction by the pressing pieces 23 </ b> A and 23 </ b> B and the clamping plate 22 by the contact force generated between them, and as a result, the wire saddle 1 is fixed to the chassis 2. Further, when viewed in the horizontal direction, the elastic piece 25 abuts against the one end side edge of the fitting hole 3 to cause the holding plate 22 to generate an elastic force in the right direction in the figure, and at the same time, the locking claw 241 is fitted into the fitting hole 3. Is engaged with the opposite side edge portion to stop the holding plate 22 from moving in the right direction in the figure. Thereby, the wire saddle 1 is restrained from moving in the horizontal direction in the figure by the elastic pieces 25 and the locking claws 241, and the above-described clamping state of the clamping plate 22 is maintained. Accordingly, as shown in FIG. 7, the wire saddle 1 is fixed in a state of being fitted in the fitting hole 3, and is prevented from being detached from the chassis 2.

  Accordingly, as shown in FIG. 8, the wire W is inserted into the U-shaped portion 11 of the holding portion 10 of the wire saddle 1 fixed to the chassis 2, and the retaining piece 12 prevents the wire W from falling off. Thus, the wire W can be held in an extended state along the surface of the chassis 2.

  On the other hand, when the wire saddle 1 attached to the chassis 2 is removed from the chassis 2, the release knob 242 of the locking / release piece 24 is pushed upward with a finger as shown in FIG. As a result, the opposite elastic piece 23B is elastically deformed upward, and the locking claw 241 integrated therewith is pulled out of the fitting hole 3 and released from engagement with the opposite edge. Then, as shown in FIG. 9B, when the wire saddle 1 is slid in the right direction opposite to that when the wire saddle 1 is mounted while using the elastic force in the right direction in the figure by the elastic piece 25, as shown in FIG. 9C. The post 21 is moved to a position where the post 21 is brought into contact with the semicircular protrusion 31 of the fitting hole 3 and the locking wall 222 of the holding plate 22 is brought into contact with the opposite edge of the fitting hole 3. In this moving position, as shown in FIG. 6A, the both shapes of the sandwiching plate and the fitting hole are exactly the same. When the wire saddle 1 is lifted onto the chassis 2 in this state, the clamping plate 22 is detached from the fitting hole 3 and the wire saddle 1 can be removed from the chassis 2.

  As described above, the wire saddle 1 according to the first embodiment can be easily attached to and detached from the chassis 2 from the surface side of the chassis 2, and when the wire saddle 1 is disassembled from the chassis 2 as a solution to environmental problems. To make the work easier. On the other hand, when the wire saddle 1 is attached to the chassis 2, on the back surface of a total of three locations (X locations in FIG. 6B), one end side edge portion of the fitting hole 3 and the semicircular protrusion portions 31 on both sides. Since it will be in the state contact | abutted with the clamping board 22, the fitting state of the chassis 2 and the clamping board 22 will become firm, and the stable fixed state is maintained. That is, the upper surface of the sandwiching plate 22 and the rear surface of the chassis 2 are brought into contact with each other at the three locations X arranged in a triangle when viewed from the plane direction, so that the external force from all directions on the wire saddle 1 from the left and right and up and down directions can be obtained. The posture and fixed state of the wire saddle 1 can be kept stable. Further, in the fixed state of the wire saddle 1, only the clamping plate 22 protrudes on the back side of the chassis 2, and the clamping plate 22 is almost deformed in the plate thickness direction by the locking wall 222 and the reinforcing rib 223. Therefore, the projecting dimension of the chassis 2 toward the back side is limited to the thickness dimension of the sandwiching plate 22. Therefore, it becomes possible to fix the wire saddle to the chassis built in the device with a small space on the back side.

  Further, in the first embodiment, the fitting hole 3 and the sandwiching plate 22 are symmetrical with respect to both the vertical direction and the horizontal direction in the plane direction, so the direction in which the wire saddle is mounted, that is, in FIGS. Even if the left and right directions are turned in the opposite directions, the chassis 2 can be fixed, the wire saddle 1 can be easily attached and detached, and the usability of the wire saddle can be improved.

  Further, the locking claw 241 of the locking / release piece 24 engages with the edge of the fitting hole 3 that is the same as the fitting hole 3 into which the holding plate 22 is fitted to prevent the wire saddle 1 from falling off. Therefore, it is not necessary to provide another locking hole in addition to the fitting hole 3 in the chassis 2, and the chassis can be easily processed.

  FIG. 10A is a front view of a second embodiment in which the present invention is applied to a wire saddle similar to that of the first embodiment. Components equivalent to those of the first embodiment are denoted by the same reference numerals. The second embodiment is different from the first embodiment in the configuration of the sandwiching plate 22 of the fitting portion 20, and the sandwiching plate 22 is formed in a rectangular shape. It is a letter shape. In the second embodiment, no elastic piece is provided. Instead, a locking wall 225 is formed so as to protrude upward at a position slightly retracted from the tip of the holding piece 22. A linear reinforcing rib 223 is integrally formed so as to extend from the locking wall 225 to the post 21 or the base end.

  For the second embodiment, the chassis 2 is provided with a T-shaped fitting hole 3A having the same shape as the sandwiching plate 22 as shown in FIG. And after inserting the clamping board 22 from the surface side of the chassis 2 to the back surface side, as each shows the front view of the state with which it mounted | wore to the chassis 2 in FIG. 11 (a), (b), and BB sectional drawing, By moving the wire saddle 1 toward the front end of the clamping plate 22, the locking claw 241 of the locking / release piece 24 is locked to the other end of the fitting hole 3A, and the clamping plate 22 is dropped from the fitting hole 3A. In addition, the holding plate 22 and the back surface of the chassis 2 are brought into contact with the tip of the fitting hole 3A at three locations on both sides of a substantially intermediate position in the length direction, thereby holding the chassis 2 in the holding plate. 22 and the elastic pieces 23A and 23B, so that the wire saddle 1 can be attached to the chassis 2.

  Thus, also in Example 2, since the clamping piece 22 is contact | abutted to the back surface of the chassis 2 in three places of the edge part of the fitting hole 3A, the fitting state of the chassis 2 and the clamping board 22 is strong. And a stable fixed state is maintained. In the second embodiment, the locking / releasing piece 24 is disposed on the opening side where the retaining piece 12 of the holding portion 10 is provided, so that the cable is attached to the holding portion 10 and the wire saddle 1 is attached to the chassis 2. The operation of the locking / releasing piece 24 at the time of removal from the same can be performed from the same direction, and the operability is improved.

  Here, as shown in a front view of a modification of the second embodiment in FIG. 12, the lower end portion of the elastic piece 25 of the first embodiment is bent without forming the above-described locking wall (225) on the sandwiching plate 22. By forming the elastic piece 25A having increased mechanical strength by forming the elastic piece 25A, the elastic piece 25A functions in the same manner as the locking wall and performs positioning, while the locking claw 241 of the locking / release piece 24 is positioned. May be prevented from coming off from the fitting hole 3A.

FIG. 13A is a front view of a third embodiment as a reference example of the present invention , and parts equivalent to those of the first embodiment are denoted by the same reference numerals. In the third embodiment, the sandwiching plate 22 is formed in a rectangular shape, a portion on the tip side from the post 21 is formed flat, and an upward hook 226 is formed on the tip. FIG. 13B is a plan view of the fitting hole 3B opened in the chassis 2. The main fitting hole 3B1 having the same rectangle as the holding plate 22 and the position of the hook 226 adjacent to the main fitting hole 3B1 are shown in FIG. And a small rectangular sub-fitting hole 3B2 that is opened apart by a dimension corresponding to.

  As shown in FIGS. 14A and 14B, respectively, a front view and a cross-sectional view taken along the CC line of the chassis 2, the wire saddle 1 is clamped in the main fitting hole 3B1. The plate 22 is inserted. When the wire saddle 1 is moved in the distal direction of the clamping plate 22, the hook 226 at the distal end is engaged with the sub-fitting hole 3B2, and at the same time, the locking claw 241 of the locking / release piece 24 is engaged with the main fitting hole 3B1. Engage with the proximal edge. In this way, the hook 226 and the sub-fitting hole 3B2 are engaged, and at the same time, the locking / release piece 24 is locked to the main fitting hole 3B1, thereby forming a double locking structure. It is reliably prevented from moving to the end side, and the sandwiching plate 22 is prevented from falling off from the main fitting hole 3B1. Further, since the surface of the almost half area on the front end side of the sandwiching plate 22 is in contact with the back surface of the chassis 2 at the edge between the main fitting hole 3B1 and the sub fitting hole 3B2, the wire saddle 1 is attached to the chassis. 2 can be attached in a stable state.

  In the first embodiment, an example in which the present invention is applied to a wire saddle is shown, but the FCC as shown in FIG. 15 and other fixtures for mounting other electronic components on the chassis are also shown. It goes without saying that the same applies. Further, the second and third embodiments are effective when it is desired to specify the direction in which the wire saddle is attached because the shape of the fitting hole is asymmetric.

It is a perspective view of Example 1 which applied the fixture of the present invention to the wire saddle. It is a fracture | rupture perspective view which shows the one part detail of a fitting part. It is the front view, right view, bottom view, and AA sectional view of a fitting part. It is a top view of a fitting hole. It is a front view which shows the process of mounting | wearing a chassis with a wire saddle. It is detail drawing of sectional drawing which follows the AA line of Fig.4 (a). It is a perspective view in the state where a wire saddle was attached to a chassis. It is a perspective view of the state where a wire was held with a wire saddle. It is a front view which shows the process of removing a wire saddle from a chassis. It is the front view of Example 2, and the top view of a fitting hole. It is the front view of the attachment state of Example 2, and a BB sectional drawing. FIG. 10 is a front view of a modified example of the second embodiment. It is the front view of Example 3, and the top view of a fitting hole. It is the front view of the attachment state of Example 2, and a BB sectional drawing. It is a front view of an example of the conventional fixture (FCC).

Explanation of symbols

1 Wire saddle 1A FCC (Flat cable clamp)
2 Chassis 3, 3A, 3B (3B1, 3B2) Fitting hole 10 Holding part 20 Fitting part 21 Post 22 Clamping plate 23A, 23B Resilient piece 24 Locking / releasing piece 25 Elastic piece 31 Semicircular protrusion

Claims (2)

A holding part for holding the component with respect to the chassis, and a fitting provided integrally with the holding part and fitted in a fitting hole provided in the chassis to fix the holding part to the chassis The fitting hole is formed in a rectangular shape or a T-shape having protrusions projecting inwardly on both side edges, and the fitting portion has a length equal to or greater than the plate thickness of the chassis. A post projecting at the front end of the post, and a sandwiching plate provided at the tip of the post and having the same shape as the fitting hole through which the fitting hole can be inserted from the front surface side to the rear surface side of the chassis, A resilient piece provided near the base end and elastically abutting against the surface of the chassis; and a locking / releasing piece provided on a part of the resilient piece, and inserted through the fitting hole. The clamping plate is oriented in one direction along the rear surface of the chassis. When brought into id, the clamping plate is in contact with the rear surface of the chassis in a triangular arranged three of said one side edge portion of the sliding-direction side and the side edges of adjacent thereto of said fitting hole, in contact with 3 The three edge portions are sandwiched between the elastic pieces at the locations, and the engagement / release pieces are engaged with the edge portions of the fitting holes in the direction opposite to the sliding direction. Fixture characterized by. An elastic piece that abuts against an edge of the fitting hole when the clamping plate is fitted into the fitting hole and biases the clamping plate in a direction opposite to the sliding direction is provided. Item 2. The fixture according to item 1.

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