JP2006073563A - Positioning mechanism, combined component and semiconductor device accompanied thereby - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a highly reliable positioning mechanism operating in a direction where component tolerance is eliminated and dispersion is converged on an engagement state of components, and also to provide a combined component using the mechanism, and a semiconductor device accompanied by the component. <P>SOLUTION: The boss 121 of a component 12 has an interference member 122, and torsion occurs in engagement with a hole 111 of a component 11. The interference member 122 is composed of wings 122a to 122d projected from a peripheral edge of the boss 121. The wings 122a to 122d are arranged in such a way that torsion in a prescribed rotation direction (arrow A2) and repulsion occur in the boss 121, by depressing them inside at the edge of the hole 111 as shown by an arrow A1 at the time of engagement with the hole 111. At the time of engagement of the hole 111 and the boss 121, component tolerance is absorbed and relieved with elasticity of the wings 122a to 122d, and highly precise positioning is realized without deviation. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a positioning mechanism provided to a combination part of a product using a plastic part or a circuit board, a combination part using the positioning mechanism, and a semiconductor device accompanied therewith.

  In recent years, with the progress of miniaturization of products such as portable devices, multi-functionality is remarkable. As a result, the number of parts in the product requires more complicated combinations. The alignment margin given to the assembly of parts is very small.

  FIG. 5 is a plan view showing an example of a general combination component mounting mode. The substrate 51 is provided with mounting holes H1 to H4 at four corners. The housing (case) 52 has bosses B1 and B2 inserted into the holes H1 and H3 of the substrate 51. The housing 52 is provided with screw holes S1 and S2 at positions corresponding to the holes H2 and H4 of the substrate 51. The housing 52 and the substrate 51 are positioned by inserting the bosses B 1 and B 2 of the housing 52 into the holes H 1 and H 3 of the substrate 51. The casing 52 and the substrate 51 are fixed by fastening screws S1 and S2.

  The hole (H1 or H3) and the boss (B1 or B2) are provided in consideration of component tolerances. The component tolerances here are hole diameter tolerance, hole position tolerance, boss diameter tolerance, and boss position tolerance. Due to such component tolerances, the hole diameter of the hole (H1 or H3) and the boss (B1 or B2) is made somewhat larger than the boss diameter. For this reason, a gap G is generated, and variations in positioning occur. Further, the holes H2 and H4 for inserting the screws S1 and S2 in the substrate 51 have a large diameter corresponding to the positioning variation. That is, the positioning of the housing 52 and the substrate 51 varies depending on the difference in the diameter (gap G) between the boss (B1 or B2) and the hole (H1 or H3).

  In the conventional structure such as the relationship between the hole and the boss, there is always a positioning variation in an arbitrary direction. As a result, it has become difficult to accommodate the assembly of products such as miniaturized portable devices. For example, when the liquid crystal module is assembled to the casing (case), it is necessary to accurately combine the liquid crystal module and the window portion of the case. If there is a large variation in positioning in the combination of parts, the result is that the downsizing of the product is hindered.

Conventionally, as a screwing mechanism, a technique having a convex screw boss provided with a rib for preventing rotation and a concave screw boss for fitting has been disclosed (for example, see Patent Document 1). In the fitted state, a coupling screw is inserted into the through hole from the back surface of the concave screw boss and screwed into the screw hole of the convex screw boss. It is a mechanism that prevents the convex screw boss from being twisted by the rotational torque of the screw and prevents the rib and the concave screw boss from being fitted. In order to fit and fix such bosses, a positioning margin (gap) is also necessary.
JP-A-11-220269 (second page, FIG. 1)

Conventional bosses and holes or bosses (convex side, concave side screw bosses) are provided with gaps due to component tolerances, so that there is a slight deviation in the mounting of components. Moreover, the deviation is in an arbitrary direction and cannot be predicted. High-precision positioning is required for assembling products such as portable devices to be miniaturized. In particular, when positioning with a boss with respect to a hole provided at two or more locations on the same plane having hardness such as a circuit board, there is a possibility that a slight misalignment due to component tolerance may not be allowed.

  The present invention has been made in consideration of the above-described circumstances. A highly reliable positioning mechanism that works in a direction to eliminate component tolerances and converges alignment variations with respect to the fitting state between components, and the same It is an object of the present invention to provide a combination part using the above and a semiconductor device accompanied therewith.

  The positioning mechanism according to the present invention uses a hole and a boss provided in each of the parts for positioning when combining at least two parts, and the boss is an interference member that causes a twist in fitting with the hole. And is adapted to be aligned with the center of the hole.

  According to the positioning mechanism of the present invention, the boss has the interference member and is used for fitting with the hole. The interference member absorbs the clearance of the component tolerance with the hole when the boss is centered and positioned.

  Further, in the positioning mechanism according to the present invention, the interference member includes two or more wings protruding from the periphery of the boss. It is arranged so that repulsion occurs. The elasticity of the wings absorbs and relaxes component tolerances, contributing to highly accurate positioning without deviation.

  In the positioning mechanism according to the present invention, the interference member includes a plurality of rotationally symmetric wings protruding from the boss periphery so as to face the predetermined rotation direction of the boss, and is pushed by the edge of the hole. Thus, the boss is twisted in the predetermined rotational direction and repelled. The plurality of wings in a rotationally symmetric form absorbs and relaxes the component tolerance due to its elasticity, and contributes to highly accurate positioning without deviation.

  In the positioning mechanism according to the present invention, the interference member has a tapered shape toward the tip end portion of the boss. As a result, the boss is guided to the corresponding hole in the initial stage of positioning, and gradually becomes twisted and repelled in a predetermined rotational direction, and finally becomes stable.

  The combination part according to the present invention includes a first part having a predetermined number of holes for alignment and a second part each having a boss provided with an interference member so as to be fitted in the hole, Regarding the coupling of the first part and the second part, at least the boss has the interference member interposed between the edge of the hole, and the interference member is pushed by the edge of the hole, so that the boss It is characterized by being twisted and repelled in a predetermined rotational direction and fixed.

  According to the combination component according to the present invention, the boss is provided with the interference member, and the interference member is interposed in the fitting with the hole. The interference member absorbs the clearance of the component tolerance with the hole when the boss is centered and positioned.

  The combination component according to the present invention further includes a fixing member for fastening the first component and the second component. As a combination part, after high-accuracy positioning without deviation, it is fastened. Reliable and stable fixation can be realized.

  In the combined component according to the present invention, the interference member includes two or more wings protruding from the boss periphery, and each of the wings has a tapered shape toward the boss tip. It is characterized by that. As a result, the boss has a tapered shape of the wing at the initial stage of positioning, and is guided by the corresponding hole, and gradually becomes twisted and repelled in a predetermined rotational direction due to the elasticity of the wing, and finally becomes stable.

  In the combination component according to the present invention, the interference member includes a plurality of rotationally symmetric wings protruding from the peripheral edge of the boss so as to face the predetermined rotation direction of the boss, and is pressed by the edge of the hole. Thus, the boss is twisted in the predetermined rotational direction and repelled. The plurality of wings in a rotationally symmetric form absorbs and relaxes the component tolerance due to its elasticity, and contributes to highly accurate positioning without deviation. Moreover, due to the tapered shape of the wings, the bosses are guided to the corresponding holes at the initial stage of positioning, and the elasticity of the wings gradually increases the twisting and repulsion in a predetermined rotational direction, and finally stabilizes.

  A semiconductor device according to the present invention includes a circuit board on which one or more IC chips are mounted and at least a hole for alignment, and a substrate support portion having a boss on which an interference member is disposed so as to be fitted in the hole. A fixing member that couples and fixes the circuit board and the board support part, and the coupling member connects the circuit board and the board support part, and the interference member is at least between the boss and the edge of the hole. It is characterized in that the interference member is pushed by the edge of the hole and the boss is twisted and repelled in a predetermined rotational direction so as to be engaged with the hole.

  According to the semiconductor device of the present invention, positioning is performed by the boss on the substrate support part side with respect to a predetermined number of holes provided on the same plane having hardness such as a circuit board. The boss has an interference member, and the interference member is interposed in the fitting with the hole. The interference member absorbs the clearance of the component tolerance with the hole when the boss is centered and positioned. Thereby, a board | substrate support part contributes to a circuit board and the highly accurate positioning without a shift | offset | difference.

  In the semiconductor device according to the present invention, the substrate support portion is a plastic housing, and the interference member has a rotationally symmetric shape protruding from the boss periphery so as to face the predetermined rotation direction of the boss. It includes a plurality of wings, and each of the wings has a taper shape toward the tip of the boss. The plurality of wings in a rotationally symmetric form absorbs and relaxes the component tolerance due to its elasticity, and contributes to highly accurate positioning without deviation. Moreover, due to the tapered shape of the wings, the bosses are guided to the corresponding holes at the initial stage of positioning, and the elasticity of the wings gradually increases the twisting and repulsion in a predetermined rotational direction, and finally stabilizes.

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 is a plan view showing a main part of a positioning mechanism according to an embodiment of the present invention.
The form of positioning at the time of combining two parts 11 and 12 is shown. The part 11 has a hole 111. The component 12 has a boss 121. The parts 11 and 12 are positioned using these holes 111 and bosses 121. The boss 121 has an interference member 122 that causes a twist in fitting with the hole 111, and is adjusted to the center of the hole 111. The interference member 122 includes, for example, wing parts 122a to 122d protruding from the periphery of the boss 121. When the wings 122a to 122d are engaged with the hole 111, the boss 121 is pushed inward at the edge of the hole 111 as shown by an arrow A1, so that the boss 121 is twisted in the predetermined rotation direction (arrow A2) and repelled. It is arranged in.

  The wings 122 a to 122 d are formed by extending members of the boss 121. The wings 122a to 122d have a rotationally symmetric shape protruding from the periphery of the boss 121 so as to face the predetermined rotation direction A2 of the boss. The wings 122a to 122d are slightly deformed when the hole 111 and the boss 121 are fitted. As a result, the component tolerances of the components 11 and 12 are absorbed and relaxed by the elasticity of the wings 122a to 122d when the hole 111 and the boss 121 are fitted. As a result, high-precision positioning without deviation can be realized.

  FIG. 2 is an external view of the configuration of the boss 121 of FIG. 1 viewed from the side. The part 11 has a hole 111 in cross section. The interference member 122 (wings 122a to 122d) has a tapered shape T toward the tip of the boss 121. Thereby, the boss 121 is guided to the hole 111 of the corresponding component 11 at the initial stage of positioning. Then, the boss 121 is inserted into the hole 111, and in the positioning and fixing stage, the twist in the predetermined rotation direction A2 and its repulsion gradually become stronger and finally stabilized.

  According to the configuration of the above embodiment, the boss 121 has the interference member 122 (the wings 122a to 122d) and is used for fitting the components 11 and 12. Interference member 122 (wings 122a to 122d) acts in a direction that eliminates the component tolerance provided between components 11 and 12. That is, the boss 121 is positioned and fixed toward the center of the boss 121 or the center of the hole 111 by the fitting of the parts 11 and 12 by the wings 122a to 122d arranged in a rotationally symmetrical manner. As a result, the component tolerances of the components 11 and 12 to be coupled are absorbed and relaxed, and high-accuracy positioning without deviation can be achieved.

  FIG. 3 is a plan view showing a modification of the boss with an interference member as shown in FIGS. The number of the wings as the interference member may be any number as long as it is two or more (FIG. 3A). Further, the boss body need not be based on a cylinder (FIG. 3B).

  For example, the configuration shown in FIG. 3A is as follows. The boss 221 has an interference member 222 (wings 222 a to 222 c) and is used for fitting the components 21 and 22. The interference member 222 (wings 222a to 222c) acts in a direction to eliminate the component tolerance given between the components 21 and 22. That is, the boss 221 is positioned and fixed toward the center of the boss 221 or the center of the hole 211 by the fitting of the components 21 and 22 by the wings 222a to 222c arranged in a rotationally symmetrical manner. As a result, the component tolerances of the components 21 and 22 to be coupled are absorbed and relaxed, and high-accuracy positioning without deviation can be achieved. That is, the number of the plurality of wings protruding from the peripheral edge of the boss is not limited as long as it is two or more. It is important that these wings are arranged so that the boss is twisted and repelled in a predetermined rotational direction by being pushed at the edge of the hole to be fitted. Positioning the center of the boss is possible because the wings are rotationally symmetric.

  For example, the configuration shown in FIG. 3B is as follows. The main body of the boss 321 is based on a square pole. The boss 321 has an interference member 322 (wings 322 a to 322 d) and is used for fitting the components 31 and 32. The interference member 322 (the wing portions 322a to 322d) acts in a direction that eliminates the component tolerance provided between the components 31 and 32. That is, the boss 321 is positioned and fixed toward the center of the boss 321 or the center of the hole 311 by the fitting of the parts 31 and 32 by the wings 322a to 322d arranged in a rotationally symmetrical manner. Thereby, the components 31 and 32 to be coupled are absorbed and relaxed by the component tolerance, and high-accuracy positioning without deviation can be achieved. In other words, the boss body need not be based on a cylinder as long as a uniform center of rotation is obtained together with the wings. A columnar form in which the wings can be rotationally symmetrical is desirable. It is important that the plurality of wings be arranged so that the boss is twisted in the predetermined rotation direction and repelled by being pushed by the edge of the hole to be fitted. Thereby, positioning to the center of a boss | hub becomes possible.

  FIG. 4 is a plan view showing an application mode of the present invention, and shows a configuration of a combination part using a boss with an interference member as shown in FIGS. 1 and 2, and a configuration of a semiconductor device realized thereby. The two parts 41 and 42 are combined and shown in a combined state. The component 41 is a circuit board on which one or more IC chips CHIP are mounted, and has holes 411 and 412 at four corners, for example. The component 42 is, for example, a plastic member housing, and has a boss 421 and a screw hole. The parts 41 and 42 are positioned using these holes 411 and the bosses 421 and fastened and fixed with screws 43 that pass through the holes 412 and screw holes.

  The boss 421 has an interference member 422 that causes a twist in fitting with the hole 411 and is adjusted to the center of the hole 411. The interference member 422 includes wings 422a to 422d protruding from the periphery of the boss 421, similarly to the configuration shown in FIGS. In other words, the wings 422a to 422d are arranged so that the boss 421 is twisted in the predetermined rotation direction and repelled by being pushed inward at the edge of the hole 411 when fitted to the hole 411.

  The wing portions 422a to 422d are formed by extending a plastic member of the boss 421. The arrangement of the wings 422a to 422d is rotationally symmetric when viewed from the direction of the central axis of rotation of the boss 421. Further, the wing portions 422a to 422d have a tapered shape toward the tip of the boss 421. Thereby, the boss 421 is guided to the hole 411 of the corresponding component 41 at the initial stage of positioning. Then, the boss 421 inserted into the hole 411 is gradually twisted and repelled in a predetermined rotational direction and positioned. The wing portions 422a to 422d are slightly deformed when the hole 411 and the boss 421 are fitted. As a result, the component tolerances of the components 41 and 42 are absorbed and relaxed by the elasticity of the wings 422a to 422d when the hole 411 and the boss 421 are fitted. As a result, high-precision positioning without deviation can be realized. After positioning, fixing without a positional shift is realized by fastening with the screw 43 passing through the hole 412 and the screw hole.

  According to the structure of the said embodiment, the effect excellent in assembling products, such as a miniaturized portable apparatus, is exhibited. For example, the component 41 is a circuit board of a liquid crystal module, and the component 42 is a casing (case) of a plastic member. When assembling both of them, the boss 421 having the interference member 422 (the wing portions 422a to 422d) is used, and the liquid crystal module and the window portion of the case can be accurately combined. As a result, a combination of components with no positioning variation can be achieved, and a semiconductor device contributing to product miniaturization can be realized.

  As described above, according to the present invention, a boss with an interference member is inserted and positioned in a combination of two parts. The interference member is a plurality of wings, and is configured to protrude in a rotationally symmetric form from the boss periphery. When the parts are fitted to each other, the wing part is pushed by the edge of the hole, thereby causing the boss to be twisted and repelled in a predetermined rotational direction. As a result, the positioning of the two parts moves toward the center of the boss or the center of the hole, and the component tolerance is absorbed and relaxed so that there is no deviation. Moreover, high-accuracy and reliable fixing is achieved by subsequent screw fastening. As a result, it is possible to provide a highly reliable positioning mechanism that works in a direction that eliminates component tolerances in relation to the fitting state between components and converges alignment variations, and a combined component using the same and a semiconductor device including the same. be able to.

The top view which shows the principal part of the positioning mechanism which concerns on one Embodiment. The external view which looked at the structure of the boss | hub of FIG. 1 from the side. The top view which shows the modification of the structure shown in FIG. 1, FIG. The top view which shows the application form of this invention. The top view which shows the example of the attachment form of a general combination component.

Explanation of symbols

  11, 12, 21, 22, 31, 32, 41, 42 ... parts, 111, 211, 411, 412, H1, H3 ... holes, 121, 221, B1, B2 ... bosses, 122, 222, 322 ... interference members , 122a to 122d, 222a to 222c, 322a to 322d ... feathers, 43 ... screws, 51 ... substrate, 52 ... housing, G ... gap.

Claims (10)

A hole and a boss provided in each of the parts are used for positioning when combining at least two parts, and the boss has an interference member that causes a twist in the fitting with the hole, and enters the center of the hole. Positioning mechanism that fits together. The interference member includes two or more wings protruding from a peripheral edge of the boss, and is arranged so that twisting in a predetermined rotation direction and repulsion occur in the boss by being pushed by an edge of the hole. The positioning mechanism according to 1. The interference member includes a plurality of rotationally symmetric wings projecting from the periphery of the boss so as to face the predetermined rotation direction of the boss, and when the interference member is pressed by the edge of the hole, The positioning mechanism according to claim 1, wherein the repulsion is caused. The positioning mechanism according to claim 1, wherein the interference member has a tapered shape toward the boss tip. A first part having a predetermined number of holes for alignment;
Second parts each having a boss with an interference member arranged to fit into the hole;
Including
Regarding the coupling of the first part and the second part, at least the boss has the interference member interposed between the edge of the hole, and the interference member is pushed by the edge of the hole, so that the boss A combination part that is fixed by twisting and repulsion in a predetermined rotational direction. The combination part according to claim 5, further comprising a fixing member that fastens the first part and the second part. The combination part according to claim 5 or 6, wherein the interference member includes two or more wings protruding from a peripheral edge of the boss, and each of the wings has a tapered shape toward the tip of the boss. The interference member includes a plurality of rotationally symmetric wings protruding from the boss periphery so as to face a predetermined rotation direction of the boss, and each of the wings has a tapered shape toward the boss tip. The combination part according to claim 5 or 6. A circuit board having one or more IC chips and at least a hole for alignment;
A substrate support portion having a boss provided with an interference member so as to fit in at least the hole;
A fixing member for coupling and fixing the circuit board and the substrate support part;
Including
Regarding the coupling between the circuit board and the board support portion, at least the boss has the interference member interposed between the edge of the hole, and the interference member is pushed by the edge of the hole to rotate the boss for a predetermined amount. A semiconductor device fitted in the hole by twisting in direction and repulsion thereof. The substrate support part is a plastic housing, and the interference member includes a plurality of rotationally symmetric wings protruding from the boss periphery so as to face a predetermined rotation direction of the boss. The semiconductor device according to claim 9, wherein each of the semiconductor devices has a tapered shape toward the tip of the boss.

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