JP4005010B2 - 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. Parts are used. For example, when a plurality of cables are arranged in parallel along the surface of the chassis, a cable tie that attaches to the chassis in a state in which a plurality of cables are bound is used. An example of a conventional cable tie is shown in FIG. The cable tie 1A has a band 41 whose other end is a free end for bundling a plurality of cables and a base end of the band 41, and the band 41 is inserted into the band 41 when the band 41 is inserted from the tip. The lock part 42 provided with the locking tooth which fits into the sawtooth which does not appear in the provided figure, and prevents the band 41 from slipping out is provided. Further, a fitting portion 50 is provided on the lower surface of the lock portion 42, and the fitting portion 50 has a pair of fitting pieces 52 projecting in the shape of an arrowhead on both sides of a post 51 protruding downward. When the fitting piece 52 is inserted into the fitting hole 3 provided in the chassis 2 from the front surface side of the chassis 2, the pair of fitting pieces 52 are reduced in diameter by elasticity and passed through the fitting hole 3. Thereafter, the step 52a provided at the end of the fitting piece 52 is fitted into the inner edge of the fitting hole 3 by elastically returning and expanding the diameter. In addition, a pair of leg-shaped pieces 55 having a letter C shape provided facing the fitting piece 52 abuts on the surface side of the chassis 2, so that the stepped portion 52 a and the fitting hole 3 are fitted to each other. Is retained. As a fixture provided with such a fitting part, there exists a thing of patent documents 1, 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 disassembled and reused from the chassis and panels. In particular, in order to easily perform the dismantling work, it is required to dismantle easily without using a tool or the like. However, in the structure of the conventional fitting portion shown in FIG. 8, it is necessary to reduce the diameter of the fitting piece 52 using a hand or a tool and pull it out from the fitting hole 3 of the chassis 2. There is a problem that the operation is difficult because the combined piece 52 is small and difficult to grasp. Moreover, it is necessary to reduce the diameter of the fitting piece 32 on the back surface side of the chassis 2, and there is a problem that workability is poor.

  In order to solve such a problem, the applicant of the present application has proposed a fixture that can be easily attached and detached from the surface side of the chassis in Japanese Patent Application No. 2003-72332. This fixing tool shows the example used for the cable clamp, and the example which applied the structure of the fitting part to the cable clamp 1B in FIG. 9 is shown. Since the basic configuration is the same as the configuration of the fitting portion 50 of the cable tie 1A in FIG. 8, the same reference numerals are given to equivalent portions, but the frame-shaped holding portion 10 for supporting the cable. A post 51 protrudes downward from the lower surface of the support piece 11 and has a pair of fitting pieces 52 at the tip of the post 51. A release piece 54 extending upward along both sides of the support piece 11 is formed at each end of the fitting piece 52 via a connecting piece 53. Therefore, even when the fitting portion 50 is fitted in the fitting hole 3 of the chassis 2, the pair of release pieces 54 are deformed inward by finger operation from the surface side of the chassis 2 as shown by arrows in FIG. Thus, the fitting piece 52 connected to the release piece 54 via the connecting piece 53 can be integrally deformed inward to reduce its diameter, and the fixture can be used as a fitting hole in the chassis 2. 3 can be removed.

  However, when the inventor further examined the proposed fixture, points to be improved became clear. This is because the fixing device mounted on the chassis 2 is normally oriented so that both end faces of the holding portion 10 are perpendicular to the line connecting both fitting pieces, When an external force is applied to the part and the holding portion 10 is twisted and deformed clockwise in the horizontal direction as shown in FIG. 10A, the holding portion 10 is rotated to a large angle and the post 51 is fitted. It will be in the state contact | abutted to the inner side of the joining piece 52. FIG. Therefore, even if the release piece 54 is deformed inward in this state, the fitting piece 52 is prevented from being deformed inward, that is, reduced in diameter by the post 51 in the contact state, and the fitting piece 52 is prevented from being deformed. It becomes difficult to pull out from the fitting hole 3. This is also the case when twisted and rotated counterclockwise as shown in FIG. 10B.

  An object of the present invention is to provide a fixture that prevents the fixture from being difficult to be removed from the chassis due to deformation in the twisting direction.

The present invention includes a holding portion for holding a component in the chassis, a fitting portion that is provided integrally with the holding portion, and that fits into a fitting hole provided in the chassis and fixes the holding portion to the chassis. In the fixing device, the fitting portion is provided at a post projecting downward from one side of the holding portion, and at a tip portion of the post, and is elastically deformed in the outer diameter direction and fitted into the fitting hole. A pair of arrowhead-shaped fitting pieces, and extending from the front end of the fitting piece along both side surfaces of the holding portion, and when manually operated, the pair of fitting pieces are elastically deformed in the inner diameter direction. A pair of release pieces for disengagement from the fitting hole, a pair of leg pieces whose base end portion is connected to a part of the release pieces and whose distal end portion can contact the surface of the chassis, and a post or holding Formed on at least one of the parts, and the post or the holding part is rotated in the twisting direction with respect to the release piece Can a stop for contact with the fitting piece or releasing piece for restricting the amount of rotation, the stopper has a first stopper for restricting the rotation in one direction of the direction the torsion is formed on the post And a second stopper that is formed in the holding portion and restricts the amount of rotation in the direction opposite to the twisting direction.

According to the present invention, it is possible to easily remove the fixture from the fitting hole of the chassis by holding the integral release piece provided on the fitting portion with fingers from both outer sides and elastically deforming the fitting piece in the inner diameter direction. It becomes possible. In addition, when the holding part is twisted and rotated by an external force applied to the holding part, the amount of rotation of the holding part or post is suppressed by the stopper to prevent interference between the post and the fitting piece or release piece, and release It becomes possible to ensure the removal of the fixture by the piece. The stopper is composed of a first stopper that is formed on the post and restricts the amount of rotation in one direction, and a second stopper that is formed on the holding portion and restricts the amount of rotation in the opposite direction. Even if the holding portion is twisted and rotated in any direction by the applied external force, the fixing member can be removed.

  In the stopper according to the present invention, a first stopper that restricts the amount of rotation of the holding portion in one direction of twisting is formed on the post, and a second stopper that restricts the amount of rotation in the opposite direction of the twisting direction is provided. It is preferable to be formed in the holding part.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a first embodiment in which the fixture of the present invention is applied to a cable clamp for extending and supporting a cable along the surface of a chassis. FIGS. 2A and 2B are a front view and a side view, and FIGS. 3A and 3B are an AA line enlarged cross-sectional view and a BB line enlarged cross-sectional view of FIG. In these drawings, a cable clamp 1 includes a holding portion 10 for clamping a cable (not shown), and a fitting hole 3 provided in the chassis 2 for attaching the holding portion 10 to the chassis 2. And both parts are integrally formed by resin molding.

  The holding portion 10 includes a support piece 11 having a substantially upward U shape, and a lock piece connected to one end of the support piece 11 so as to be able to open and close the opening of the support piece 11 and having a small U shape at the tip. 13 and a lock body 14 provided at the other end of the support piece 11 and detachably locks the lock piece 13. In this holding portion 10, a cable that supports the opening through the opening with the hinge piece 12 opened is inserted into the support piece 11, and then the hinge piece 12 is closed and the lock piece 13 is engaged with the lock body 14 to thereby engage the support piece 11. Prevents cables from falling off. Further, the cable can be taken out from the support piece 11 by operating the lock piece 13 with a finger to release the lock with the lock body 14.

  The fitting portion 20 includes a substantially elongated plate-like post 21 that protrudes downward from the lower surface of the substantially center of the support piece 11 by a predetermined length. A pair of fitting pieces 22, 22 that are elastically deformable in the radial direction are connected to the lower end portion of the post 21, and are formed in an arrowhead shape as a whole. The outer side surfaces of the pair of fitting pieces 22 and 22 are formed in a circular arc shape with the post 21 as a center, and constitute a part of a circular outline. In addition, connecting pieces 23 and 23 having a small plate thickness are integrally connected to the end portions of the pair of fitting pieces 22 and 22 whose diameters are enlarged, and the connecting surface is formed on the outer surface of the tip portion. Step portions 22a and 22a in the radial direction corresponding to the difference in plate thickness between the pieces 23 and 23 and the fitting pieces 22 and 22 are formed.

  At the upper ends of the pair of connecting pieces 23, 23, there are a pair of release pieces 24, 24 extending upward in a state of being curved somewhat outward along both side surfaces of the support piece 11. It is connected. In addition, a pair of legs projecting substantially straight in a state in which the pair of release pieces 24, 24 are connected to the connecting pieces 23, 23, respectively, in a state of being inclined slightly downward in both outward directions. The pieces 25 and 25 are integrally formed. The tip portions of the pair of leg pieces 25, 25 are usually positioned slightly above the step portions 22a, 22a of the fitting pieces 22, 22 corresponding to the plate thickness of the chassis 2. Further, the upper end portions 24a, 24a of the pair of release pieces 24, 24 are formed to be slightly thin and directed inward, and are opposed to each outer surface of the support piece 11 with a slight gap. Is located so that.

  Here, as shown in FIG. 4 (a), which is a partially broken perspective view of the main part, the post 21 is arranged so that both side edges of the upper part in the length direction, in other words, the upper end part of the connecting piece are opposed to each other. A pair of first stoppers 26 and 26 projecting in a substantially right angle direction opposite to each other are formed integrally with each other. The first stoppers 26 and 26 are formed in a tapered shape that has a constant protruding dimension from the upper end portion to a required length and gradually decreases in the lower region. The maximum projecting dimensions of the first stoppers 26 and 26 are such that when the post 21 is rotated by being twisted to a predetermined angle in the horizontal direction, that is, both sides of the support piece 11 are the release pieces. Each of the first stoppers 26 and 26 is set to a size that abuts against one side portion of the connecting pieces 23 and 23 when rotated to an angle that does not abut against 24.

  Also, as shown in FIG. 4B, a partially broken perspective view of the main part, the first stoppers 26, 26 are defined by the holding part 10, here along the side edge of the support piece 11. Second stoppers 15 and 15 are integrally formed at point-symmetrical positions on the opposite side in the rotational direction and with the post 21 as the center. These second stoppers 15 and 15 are connected to the connecting pieces 23 and 23 or the releasing pieces 24 and 24 connected thereto when the support piece 11 is rotated to the predetermined angle together with the post 21 as described above. It is set at a predetermined position calculated based on the width dimension of the support piece 11 so that one side portion is brought into contact therewith.

  According to the cable clamp 1 having the above configuration, when the cable clamp 1 is attached to the fitting hole 3 of the chassis 2, the fitting portion 20 is inserted into the fitting hole 3 from the upper surface side of the chassis 2. By inserting in this way, as shown in FIG. 5A, the pair of fitting pieces 22, 22 of the fitting portion 20 is elastically deformed in the inner diameter direction to be reduced in diameter, and inserted into the fitting hole 3. Enable. When the fitting pieces 22, 22 pass through the fitting hole 3, the fitting pieces 22, 22 are restored by elastic force and expanded in the outer diameter direction, and the stepped portions 22 a, 22 a are fitted on the lower surface of the chassis 2. Engage with the inner edge of the hole 3. At the same time, the tip portions of the pair of leg pieces 25, 25 are elastically contacted with the surface of the chassis 2 to urge the fitting portion 20 upward, so that the stepped portions 22a, 22a are fitted into the fitting holes. 3 will be pressed against the inner edge portion, and the engaged state will be maintained. Thus, even when the cable tie 1 is pulled upward, the fitting portion 20 is not inserted into and removed from the fitting hole 3 due to the engagement between the step portions 22a and 22a and the fitting hole 3, and the cable clamp 1 Can be fixed to the chassis 2. 6 is a perspective view of the main part in the mounted state.

  Therefore, although illustration is omitted, the hinge piece 12 of the holding portion 10 is opened and a cable to be extended on the upper surface of the chassis 2 is inserted into the support piece 11, and the hinge piece 12 is closed and the lock piece is closed. By engaging 13 with the lock body 14, the cable is held and extended and supported on the surface of the chassis 2. In addition, after the cable is first held in the support piece 11, the fitting portion 20 may be inserted into the fitting hole 3 to be fitted and attached.

  On the other hand, when the cable clamp 1 attached to the chassis 2 is detached from the chassis, as shown in FIG. 5B, the release pieces 24, 24 are picked from both outsides with two fingers F and force is applied from both sides. To release the release pieces 24, 24 inward. As a result of this deformation, the connecting pieces 23 and 23 integral with the release pieces 24 and 24 are also deformed inward as shown in the figure, and the fitting pieces 22 and 22 integral with the connecting pieces 23 and 23 are also deformed inward. Thus, the stepped portions 22a and 22a are disengaged from the inner edge of the fitting hole 3. Therefore, by pulling the cable tie 1 up above the chassis 2 as it is, the fitting portion 20 can be pulled out from the fitting hole 3 and the cable clamp 1 can be removed.

  Here, in the state of FIG. 5A in which the cable clamp 1 is attached to the chassis 2, the distal ends of the pair of leg pieces 25, 25 are deformed so as to be in contact with the surface of the chassis 2 and spread. The pair of release pieces 24, 24 are deformed in a direction to fall inward, and the upper end portions 24a, 24a of the release pieces 24, 24 are brought into contact with both side surfaces of the support piece 11 with some elastic force. For this reason, stress that spreads in the outer diameter direction is applied to the pair of fitting pieces 22 and 22 through the connecting pieces 23 and 23 by the action of the release pieces 24 and 24 as fulcrums. And the fitting force between the fitting hole 3 and the cable clamp 1 are not easily detached from the fitting hole 3 and are not easily detached from the chassis 2 even by an external force or the like. Further, at this time, the pair of leg pieces 25, 25 is changed in the amount of deformation at the tip portion according to the difference in the plate thickness of the chassis 2, and the chassis between the fitting pieces 22, 22 is also affected by the difference in the plate thickness. 2 is sandwiched in the plate thickness direction to ensure a fitted state.

  In the same state, even if the cable clamp 1 receives an external force transmitted through the cable and the holding portion is tilted on the chassis 2, the support piece 11 and the upper end portions 24a and 24a of the release pieces 24 and 24 are separated from each other. Therefore, the release pieces 24 and 24 are not tilted by being pulled by the support portion 11. Therefore, the release pieces 24, 24 are tilted in the inner diameter direction and the fitting state between the fitting pieces 22, 22 and the fitting hole 3 is not impaired, and the fitting portion 20 is prevented from being detached. Further, when the holding portion 10 is tilted, the support piece 11 is brought into contact with the upper end 24a of the tilted release piece 24, so that the holding portion 10 is prevented from further tilting and released. Further tilting of the piece 24 is also suppressed.

  Further, in the same state, when the holding portion 10 of the cable clamp 1 is horizontally rotated in one direction (counterclockwise in the figure) through the cable, as shown in FIG. 21 is rotated integrally. Then, when the pair of first stoppers 26 and 26 are brought into contact with the connecting pieces 23 and 23 as indicated by broken line circles when they are rotated by a predetermined angle, the subsequent rotation of the holding portion 10 and the post 21 is performed. Is locked. On the other hand, when the holding part 10 is rotated horizontally in the opposite direction (clockwise), as shown in FIG. 7B, the second stoppers 15 and 15 provided on the support piece 11 are respectively within the broken line circles. As shown in the figure, since the contact pieces 23 and 23 or one side portion of the release pieces 24 and 24 are in contact with each other, the subsequent rotation of the holding portion 10 and the post 21 is similarly locked. Thus, in a state in which the amount of rotation in both directions in the horizontal direction is suppressed, the required distance between the post 21 and both fitting pieces 22 and 22 and between the support piece 11 and both release pieces 24 and 24 is required. Since the interval is secured, the release pieces 24, 24 are operated by fingers, so that a state in which the release pieces 24, 24 can be deformed inside is secured, and the fitting pieces 22, 22 are contracted by the inside deformation of the release pieces 24, 24. The fitting state between the fitting pieces 22 and 22 and the fitting hole 3 is eliminated, and it is ensured that the cable clamp 1 is removed from the chassis 2.

  Here, in the first embodiment, the first stoppers 26 and 26 and the second stoppers 15 and 15 are formed at different positions because the cable clamp 1 is manufactured by resin molding. This is to prevent the first and second stoppers from becoming an obstacle to separation when separating the molding die in the front and back directions. Accordingly, if there is no problem in complicating the mold structure, either the first stopper 26 or 26 or the second stopper 15 or 15 is attached to both sides of the post 21 or the support piece 11 of the holding part 10. It is also possible to arrange them symmetrically on both sides.

Incidentally, wherein at the first embodiment of the present invention shows an embodiment applied to a cable clamp, construction of the holding portion can be similarly applied to other different fixtures. That is, it goes without saying that the present invention can be similarly applied to various fixtures in which the fitting portion is fitted and attached to a fitting hole provided in the chassis and the holding portion holds various components on the chassis.

It is a perspective view of Example 1 which applied the present invention to a cable clamp. It is the front view and side view of a cable clamp. FIG. 3 is a cross-sectional view taken along line AA and a cross-sectional view taken along line BB in FIG. 2. It is a partially broken perspective view which shows the 1st and 2nd stopper. It is sectional drawing of the state fitted to the state which fits a fitting part in a fitting hole. It is a perspective view of the principal part of the state fitted. It is typical sectional drawing in the state where rotational force was applied to the holding part. It is sectional drawing of a part of conventional fixing tool. It is a schematic block diagram of the fixing tool proposed previously. It is a schematic diagram for demonstrating the problem of the fixing tool proposed.

Explanation of symbols

1 Cable clamp (fixture)
2 Chassis 3 Fitting hole 10 Holding part 11 Supporting piece 12 Hinge piece 13 Locking piece 14 Locking body 15 Second stopper 20 Fitting part 21 Post 22 Fitting piece 23 Connecting piece 24 Release piece 25 Leg piece 26 First stopper

Claims (1)

A holding portion for holding a component in the chassis; and a fitting portion 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 portion includes a post projecting downward from one side of the holding portion and a tip portion of the post, and is elastically deformed in an outer diameter direction to be fitted into the fitting hole. A pair of arrow-fitting fitting pieces that are fitted to each other, and a pair of fitting pieces that extend from the front end portion of the fitting piece along both side surfaces of the holding portion and are manually operated. A pair of release pieces that are elastically deformed in the inner diameter direction to disengage from the fitting holes, and a base end portion is connected to a part of the release pieces, and a distal end portion is in contact with the surface of the chassis A pair of possible leg pieces and at least one of the post or the holding part, Said fitting piece or release piece when post or the holding portion is rotated in the direction the torsion relative to the releasing piece abutting a stopper for restricting the amount of rotation, the stopper is the post A first stopper that restricts the amount of rotation in one direction in the twisting direction and a second stopper that is formed in the holding portion and restricts the amount of rotation in the opposite direction of the twisting direction. Fixture characterized by being made.

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