JP3200944B2 - PCB component fixing mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a component fixing mechanism for a board suitable for, for example, arranging and fixing electronic components on a chassis.

[0002]

2. Description of the Related Art Conventionally, when mounting an electronic component on a chassis, a screw hole is formed in the chassis, and a screw is inserted into a through hole formed in the base of the electronic component and screwed into a screw hole of the chassis. It was fixed by tightening.

Also, a plurality of hook-shaped engaging pieces are formed on a chassis by outsert molding of a resin material so that the electronic components can be easily attached to the chassis.
Attachment is performed by fitting a base portion of the electronic component between the engagement pieces and engaging with the side edge.

[0004]

As described above, in the above-described structure in which the electronic component is fixed to the chassis by the former screw, the screw hole is formed in the chassis and a through hole is formed in the base of the electronic component. There are many drawbacks, such as the number of man-hours required for installation and the need for screws, which increases the cost. In the case of automated assembly, a screw supply device and a screw tightening device are required, resulting in increased equipment costs. Further, in the above-mentioned configuration in which the latter is engaged with the hook-shaped engagement piece formed by outsert molding, the mounting process of the electronic component to the chassis is simplified, but the engagement piece is formed by the base of the electronic component. The shape is such that it has elasticity so that it can be easily engaged and the engaging portion is also shallowly engaged, so that it is easily disengaged, and particularly when the electronic component is a movable component, there is a problem that it cannot be reliably fixed and held.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a component fixing mechanism capable of securely fixing components by a fixed body insert-molded on a substrate.

[0006]

In order to achieve the above object, a component fixing mechanism for a substrate according to the present invention comprises a fixed member rotatably formed on a substrate supporting and fixing a component by outsert molding of a resin material. An engaging portion formed on one side surface of the fixed body and engaging with the component to restrict the movement of the component in the axial direction of the fixed body; and a locking piece formed on the other side surface of the fixed body. And the substrate is formed by outsert molding of a resin material, the fixed body is rotated to a position where one side surface of the fixed body faces the component, and the locking piece rides over. And a locking body for restricting rotation in a return rotation direction opposite to the rotation,
When the fixed body is rotated, one side surface of the fixed body faces the component and the other side surface of the fixed body faces the locking body, and the engaging portion regulates the movement of the fixed body in the axial direction of the component. In addition, a locking piece formed on the other side is locked by the locking body, and the rotation of the fixed body in the return rotation direction is restricted.

Further, according to the present invention, a locking member for locking a fixed body in a state where one side surface of a fixed body is opposed to a component and an engaging portion is engaged with the component is outsert of a resin material. It is formed by molding.

In the component fixing mechanism for a board of the present invention configured as described above, the fixing portion is engaged with the component by rotating the fixed body in a state where the component is arranged on the board corresponding to the fixed body. Then, while restricting the movement of the component in the axial direction of the fixed body orthogonal to the rotation direction, the fixed body is returned by being locked by the locking body in a state where the engaging portion is engaged with the component. The rotation is prevented, and the component is securely fixed to the substrate.

Further, the fixed body is prevented from rotating by being locked by the locking body in a state where the engaging portion is engaged with the component, and the component is securely fixed to the substrate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. This embodiment applies the present invention to a case where a plunger as an electronic component is fixed to a chassis as a substrate.

In FIG. 1, reference numeral 1 denotes a chassis, on which a guide fixing mechanism 3 of a plunger 2 is formed by outsert molding of a resin material.

The plunger 2 includes a bobbin 4 and the bobbin 4.
The coil 5 and the bobbin 4 are inserted into the coil 5 via the substantially U-shaped yoke 6 and the bobbin 4 in which the bent surface portions 6a and 6b of the bobbin 4 are in contact with both quadrangular flange portions 4a and 4b. And a movable iron core 7.

A guide fixing mechanism 3 for fixing the plunger 2 to the chassis 1 includes two flange portions 4a, 4a of the bobbin 4.
b, and guide members 11 and 12 which abut on both side surfaces of the yoke 6 and the bent surface portions 6a and 6b of the yoke 6 to engage in the X direction and the Y direction (in the horizontal direction and the vertical direction in FIG. 2), and the intermediate surface portion 6c of the yoke 6 Fixed body 1 that engages in the thickness direction with both side edges of
3 and 14.

That is, the guide members 11 and 12 are
Are formed by outsert resin based on the square holes 1a and 1b of the bobbin 4, and both flange portions 4a and 4b of the bobbin 4.
X-direction positioning engaging portions 11a, 1 engaging with both side surfaces of
1b, 12a, and 12b, and a Y-direction positioning engaging portion 11c that is located between the engaging portions 11a and 11b and 12a and 12b and that engages with the outer surfaces of the bent surfaces 6a and 6b at both ends of the yoke 6. And 12c are formed, and
The X-direction positioning engagement portions 11a, 11b and 12
a, 12b and Y-direction positioning engagement portions 11c and 12c
Are formed as height determining mounting portions 11d and 12d with which the lower surface side of the intermediate surface portion 6c of the yoke 6 abuts.

The guide 1 thus formed
The fixed members 13 and 14 located on both sides between the first and second guide members 1 and 12 are completely independent of the two guide members 11 and 12,
Are formed of an outsert resin with reference to the round holes 1c and 1d, and can be rotated in the X and Y directions by an external pressure. The bases 13a and 14a are almost the same as the height-determined mounting portions 11d and 12d of the guide bodies 11 and 12. Round hole 1c with equal thickness
And 1d, are formed in a disk shape with a diameter larger than 1d, and on both of the disk-shaped lower portions 13a and 14a, rising portions 13b and 14b having substantially vertical notched surfaces on both sides are formed, and one of the rising portions 13b and 14b is formed. notched surface 13b ₁ and 14b ₁ are as opposed to the side end face of the intermediate surface portion 6c of each yoke 6. Notched surface 13b _{1 of} these rising portions 13a and 14b
And one of the peripheral surfaces 13b ₂ and 14b adjacent to 14b _1
2 , engaging steps 13 c and 14 c which engage with side edges of the intermediate surface 6 c of the yoke 6 in a state where the fixed bodies 13 and 14 are rotated from the Y direction to the X direction, and upper surfaces of the disc-shaped bases 13 a and 14 a And a notch at an interval substantially equal to the thickness of the intermediate surface portion 6c of the yoke 6. The engagement step 13c and 14c are formed so the inner surface 13c ₁ and 14c ₁ in engagement with the intermediate surface portion 6c of the yoke 6 is substantially in contact with the side end surface of the intermediate surface portion 6c, the inner surface 13c ₁ and 14c ₁ The end portions 13c ₂ and 14c ₂ on the rotation direction side are separated from the inner surfaces 13c ₁ and 14c ₁ by one notched surface 13b _1.
And subjected 14b ₁ is formed as an arc surface so that the diameter.

The upper ends of the rising portions 13b and 14b are formed with insertion engaging grooves 13d and 14d for a tool for rotating the fixed bodies 13 and 14.

The fixed bodies 13 and 14 have engaging step portions 13c and 1c on the peripheral surfaces of the disk-shaped base portions 13a and 14a.
The locking pieces 13e and 1e extend in a direction substantially orthogonal to the
4e is formed, pushing surface 13e ₂ and the locking pieces 13e and 14e are inclined in the rotational direction engagement step 13c and 14c inner surface 13c ₁ and 14c ₁ and in a direction parallel locking surface 13e ₁ and 14e ₁ of 14e ₂ .

On the other hand, the above-mentioned guide member on one side, that is, the guide member 11 on the rotation direction side of the fixed member 13, is provided with a mounting portion 11d.
A support piece 21 is integrally formed to extend inward (in the Y direction) from the center of the inner edge of the support member 1.
Locking projections 21c and 2 are formed by extending supporting arms 21a and 21b in the vicinity of 3 and 14, respectively, and locking the locking pieces 13e and 14e of the fixed bodies 13 and 14 at their distal ends.
1d is formed to protrude. The locking projections 21c and 21
The distance d is the positioning engagement portion 11 of the guide body 11 in the X direction.
It is slightly wider than between a and 11b.

The two guide bodies 11, formed as described above,
As described above, the resin body 12 and the fixed bodies 13 and 14 are formed by outsert molding of the resin into the chassis 1. In this insert molding, the guide bodies 11 and 12 are separated from the sprue installed at a position away from the molded part. As described above, the resin material is flowed through the resin material and molded on the basis of the square holes 1a and 1b of the chassis 1 so that the resin material is fixed to the chassis 1. Piece 21
Since the support arms 21a and 21b are molded only on the surface side of the chassis 1, they are not fixed to the chassis 1 and can be elastically deformed within the elasticity of the molded resin material itself. In the drawing, reference numeral 15 denotes a resin solidified in a molding runner of one guide body 11, reference numeral 16 denotes a trace of a molding sprue of the other guide body 12, and reference numeral 17 denotes a resin solidified in a molding runner.

The fixed bodies 13 and 14 are formed so as to be rotatable with respect to the chassis 1 with respect to the guide bodies 11 and 12 which are fixedly formed on the chassis 1 in this manner. In this insert molding, as described above. The two fixed bodies 13 and 14 are separately formed by directly flowing a resin material with reference to the round holes 1c and 1d formed in the chassis 1, and the fixed bodies 13 and 14 are one of the rising portions 13b and 14b. Notch 13b ₁
And 14b ₁ face each other in parallel, and
Molding is performed with e and 14e positioned inside.

Since the resin material does not conform to the chassis 1 after molding, the fixed bodies 13 and 14 thus formed can rotate around the round holes 1c and 1d of the chassis 1. In the drawings, reference numerals 18 and 19 denote flange portions which are integrally formed through the round holes 1c and 1d on the other surface side of the chassis 1 in forming the fixed bodies 13 and 14, and are disc-shaped base portions 13a and 14a.
And are formed to have substantially the same diameter. Numerals 18a and 19a are spaces for the traces of the engaging dies 13c and 14c.

The guide bodies 11, 1 formed as described above
In order to fix the plunger 2 to the chassis 1 by the guide fixing mechanism 3 including the fixing members 2 and the fixing members 13 and 14, first, the both ends of the plunger 2 are pushed in in correspondence to the guide members 11 and 12 in the X and Y directions. Position. That is, the two flange portions 4a and 4b of the bobbin 4 of the plunger 6 are connected to the X-direction positioning engagement portions 11a and 1 of the guide bodies 11 and 12.
1b and between 12a and 12b, and push in with the bent surfaces 6a and 6b at both ends of the yoke 6 corresponding to the Y-direction positioning engaging portions 11c and 12c, respectively. In this case, the fixed member 13 and 14 are notched surface 13b ₁ and 14b ₁
Are formed in a state where they are parallel to each other and do not hinder the plunger 2 from being pushed.

By pushing the plunger 2 between the guides 11 and 12 in this manner, the plunger 2
The positioning in the direction and the Y direction is performed, and the intermediate surface portion 6c of the yoke 6 abuts on the height determining placement portions 11d and 12d of the guide bodies 11 and 12, so that the positioning is also performed in the height direction.

Next, the fixed bodies 13 and 14 are
The tool is inserted into the engagement grooves 13d and 14d of the b and 14b, and is fixed in the Y direction by rotating the one fixed body 13 in the counterclockwise direction and the other fixed body 14 in the clockwise direction in the drawing. The bodies 13 and 14 are locking pieces 13e and 14
If e presses the locking cam 21c and 21d at the pushing surface 13e ₂ and 14e _2, is rotated to overcome the locking cam 21c and 21d by bending the support arms 21a and 21b, the rising portion 13b and One peripheral surface 13b ₂ of 14b
And 14b. The engagement steps 13c and 14c on the ₂
Is engaged with the side edge portion of the intermediate surface portion 6c. That is, both side edges of the intermediate surface portion 6c of the yoke 6 are in contact with the upper surfaces of the disk-shaped base portions 13a and 14a of the fixed bodies 13 and 14, and the engagement step portions 13c and 14
sandwiched side end face between the side surface 13c ₃ and 14c ₃ on the c and the inner surface 13c ₁ and 14c ₁ becomes contact state.

In the rotation of the fixed bodies 13 and 14, one of the notches 13b ₁ and 14b of the rising portions 13b and 14b
b ₁ and the inner surface 13c of the engaging step portion 13c and 14c ₁ and 1
Side end portion 13c ₂ and 14c ₂ between 4c ₁ fixed member 13 and 14 because it is formed as an arc surface is smoothly rotated without hooked.

In this manner, the fixed members 13 and 14 are initially positioned by the support arm portions 21a and 21b where the locking pieces 13e and 14e are elastically restored in the state of being engaged with the intermediate surface portion 6c of the yoke 6 of the plunger 2. The locking surfaces 13e ₁ and 14 are provided on the outside of the locking projections 21c and 21d.
by being engaged in e _1, engaged in the vertical direction is held relative to the plunger 2 without being inadvertently return rotation. Accordingly, the movement of the plunger 2 in the X direction and the Y direction with respect to the chassis 1 is restricted by the guide members 11 and 12 of the guide fixing mechanism 3, and the movement of the plunger 2 in the vertical direction is restricted by the fixed members 13 and 14. Fixed securely. As described above, the case where the plunger 2 is fixed to the chassis 1 has been described as one embodiment of the present invention, but the engaging portions of the guide fixing mechanism 3, that is, the engaging portions of the guide bodies 11 and 12 and the fixing bodies 13 and 14. The size of
Chassis 1 of various electronic parts by changing shape etc.
It can also be applied to fixing to

When the fixing parts are large or long, the number of the fixing bodies 13 and 14 can be increased by appropriately increasing the number of the fixing parts.

When the fixed parts are small, the fixed body 1 is not used without the guides 11 and 12 for positioning in the X and Y directions.
It is also possible to fix by using only the fixing members 3 and 14, and a mechanism for preventing the return rotation after the rotation engagement of the fixing members 13 and 14 is not always necessary.
In the state in which the component 4 is engaged with the component, there is almost no possibility that the component is unintentionally rotated by the frictional resistance between the chassis 1 and the component to be released. In particular, in the case of a component that has a movable mechanism inside and generates vibrations, it is possible to further securely fix the components by returning to the fixed bodies 13 and 14 and combining with a rotation preventing mechanism.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and various changes can be made without departing from the spirit of the present invention.
Further, the present invention can be applied to fixing various components to a substrate without being limited to electronic components.

[0030]

As described above, according to the present invention, when the fixed body is rotated, one side of the fixed body is opposed to the component, and the engaging portion regulates the axial movement of the fixed body of the component. In addition, in this state, the fixed body is returned by the locking body and locked in the rotation direction, that is, by rotating the fixed body rotatably supported by the substrate, the fixing part is fixed orthogonally to the rotation direction by the engagement portion. Since the movement of the components in the axial direction of the body is restricted and the fixed body is returned and locked in the rotation direction by the locking body, the components can be fixed to the substrate without the need for screws or the like, and the rotation of the fixed body can be performed. In addition to restricting the movement of the component in a direction perpendicular to the direction, the fixed body is prevented from returning and rotating, so that even if vibration or the like occurs, the component is hardly disengaged, and secure fixing can be realized. Further, since a fixed body, a locking body, and the like are formed by outsert molding of a resin material, a separate member such as a screw is not required for fixing a component to a substrate. Therefore, in an automated assembly, a screw supply device and a screw tightening device are used. It is not necessary to use such a method, and it is possible to reduce the equipment cost and to reduce the number of products.

[Brief description of the drawings]

FIG. 1 is a perspective view of one embodiment of the present invention.

FIG. 2 is a plan view showing the same operating state.

FIG. 3 is a cross-sectional view in FIG.

FIG. 4 is a perspective view showing a state in which a plunger is fixed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Substrate 1c, 1d Round hole 2 Plunger 3 Guide fixing mechanism 11, 12 Guide body 13, 14 Fixed body 13c, 14c Engagement step 13e, 14e Locking piece 21 Supporting piece 21a, 21b Support arm part 21c, 21d Stop

Claims (1)

(57) [Claims] 1. A fixed body rotatably formed on a substrate for supporting and fixing a component by outsert molding of a resin material, and a fixed body formed on one side of the fixed body and engaging with the component, An engaging portion for restricting movement of the fixed body in the axial direction of the component, a locking piece formed on the other side surface of the fixed body, and a resin material formed on the substrate by outsert molding;
The fixed body is rotated to a position where one side surface of the fixed body is opposed to the component, and the locking piece moves over, so that the locking piece is locked and the fixed body is rotated in a direction opposite to the rotation. A locking body for restricting rotation in a certain return rotation direction, wherein the fixed body is rotated so that one side of the fixed body faces the component and the other side of the fixed body is connected to the locking member. The engaging portion opposes the stopper, the engaging portion regulates the movement of the component in the axial direction of the fixed member, and the locking piece formed on the other side surface is locked by the locking member to fix the fixed member. Wherein the rotation in the return rotation direction is restricted.