JPH0419833Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a printed circuit board mounting device for electrical equipment.

[Prior Art] A conventional printed circuit board mounting device for electrical equipment has a structure as shown in FIG.

A small diameter portion 2a is located at a predetermined position in the center of the holder 1.
One or more stepped bosses 2 consisting of a large-diameter portion 2b are integrally formed, and a printed circuit board 3 is attached to the end.
A plurality of support pieces 4 are integrally formed, each having a claw portion 4a that engages with the peripheral edge of the support piece 4. Then, the small diameter portion 2a of the stepped boss 2 is inserted into the hole 5 provided in the printed circuit board 3 to position the printed circuit board 3, and the supporting piece 4 is brought into contact with the stepped portion of the large diameter portion 2b. Claw part 4
It has a structure in which the printed circuit board 3 is supported by the holder 1 by engaging the peripheral edge of the printed circuit board 3.

[Problems to be solved by the invention] Since the conventional technology has a support structure using the stepped portion of the large diameter portion 2b of the stepped boss 2 and the claw portion 4a of the support piece 4, only one printed circuit board 3 is supported. Moreover, the supporting position thereof is constant in the axial direction of the stepped boss 2.

Therefore, when it becomes necessary to arrange and support a plurality of printed circuit boards 3 in a layered manner or to change the supporting position (in the axial direction of the stepped boss 2), it is necessary to increase the diameter of the stepped boss 2. The support structure consisting of the portion 2b and the claw portion 4a of the support piece 4 must be added each time.

[Means for solving the problem] A middle diameter part 6b and a large diameter part 6 are provided at a predetermined position in the center part.
The stepped boss 6 is integrally formed with a first stepped portion 7 formed by the middle diameter portion 6b and a second stepped portion 8 formed by the large diameter portion 6c. A support piece 9 consisting of a claw portion 9a and a protruding strip portion 10a formed from the first engaging surface 9b of the claw portion 9a toward the root, the lower surface of which is the second engaging surface 10b.
a first printed circuit board 11 having a notch 14 that fits or loosely fits into the convex strip 10a at a position corresponding to the supporting piece 9 on the peripheral edge thereof; a second printed circuit board 12 in which a large hole 15 is formed at a position corresponding to the stepped boss 6, the diameter being larger than the diameter middle part 6b of the stepped boss 6 and smaller in diameter than the large diameter part 6c; The printed circuit board 11 is brought into contact with the first stepped portion 7, and the cutout portion 14 is fitted or loosely fitted into the convex strip portion 10a of the support piece 9, and the first
The printed circuit board 11 is connected to the first engaging surface 9 of the claw portion 9a.
b and supported by the holder 5, and the small diameter portion 6a and the middle diameter portion 6b of the stepped boss 6 are inserted into the large hole 15 of the second printed circuit board 12, and the second printed circuit board 12 is supported by the holder 5. The second printed circuit board 12 is attached to the holder 5 by bringing it into contact with the second stepped portion 8 and engaging the second engaging surface 10b of the convex portion 10a. To support.

[Function] (a) The first printed circuit board 11 is connected to the first stepped portion 7 and the claw portion 9.
In addition, the second printed circuit board 12 can be supported on the holder 5 by the second stepped portion 8 and the protruding strip portion 10a. That is, two (or more) first and second printed circuit boards can be arranged in layers and supported at different support positions (in the axial direction of the stepped boss 6).

(b) If the supporting position of the printed circuit board changes due to a change in the model number of the electrical device or a design change, either of the support structures for the first printed circuit board 11 and the second printed circuit board 12 will be changed. By using either support structure, one holder 5
In other words, the printed circuit boards can be supported at different support positions (in the axial direction of the stepped bosses 6) using the same holder 5.

[Example] This will be explained with reference to FIGS. 1 and 2.

Reference numeral 5 denotes a holder, which is composed of a small diameter part 6a, a middle diameter part 6b, and a large diameter part 6c at a predetermined position in the center, and the first stepped part 7 is connected to the large diameter part 6c by the middle diameter part 6b. As a result, the stepped boss 6 provided with the second stepped portion 8 is integrally formed.

Reference numeral 9 denotes a support piece integrally formed at the end of the holder 5, and a claw part 9a is formed at the tip thereof, and a protruding strip part 10a extends from the first engaging surface 9b of the claw part 9a toward the base. is formed, and its lower surface serves as a second engagement surface 10b.

If the dimensions from the bottom of the holder 5 to the first step 7 and second step 8 of the stepped boss 6 are l1 and l2, respectively, then the distance from the bottom of the holder 5 to the first engaging surface 9b of the claw portion 9a is dimension L1 up to, the second of the convex strip 10a
The dimension L2 up to the engaging surface 10b is L1≦l1+t1 L2≦l2+t2 where t1 and t2 are the thicknesses of the first and second printed circuit boards, and usually t1=t2.

It is determined that

11 and 12 are first and second printed circuit boards.

The first printed circuit board 11 has a small hole 13 formed at a position corresponding to the stepped boss 6, the diameter of which is larger than the small diameter portion 6a of the stepped boss 6 and smaller than the middle portion 6b of the stepped boss 6. A notch 14 that fits or loosely fits into the protruding strip 10a is formed at a position corresponding to the support piece 9. Then, this first printed circuit board 11
Insert the small diameter portion 6a of the stepped boss 6 into the small hole 13,
In addition, the notch portion 14 is fitted or loosely fitted into the convex strip portion 10a to position the first printed circuit board 11, and is brought into contact with the first step portion 7, and the claw portion 9a
The first engaging surface 9b of the first printed circuit board 11 is engaged with the peripheral edge of the first printed circuit board 11 (portions on both sides of the notch 14), and the first printed circuit board 11 is supported by the holder 5.

The second printed circuit board 12 has a large hole 15 formed at a position corresponding to the stepped boss 6, the diameter of which is larger than the middle diameter portion 6b of the stepped boss 6 and smaller than the large diameter portion 6c. The large hole 15 of this second printed circuit board 12
The small diameter portion 6a and the middle diameter portion 6b of the stepped boss 6 are inserted through to position the second printed circuit board 12, and its surface is brought into contact with the second stepped portion 8, and
The second engaging surface 10b of the protruding portion 10a is engaged with the peripheral edge of the second printed circuit board 12, and the second printed circuit board 12 is supported on the holder 5.

In the above embodiment, the small diameter portion 6a of the stepped boss 6 is inserted into the small hole 13 of the first printed circuit board 11, and the notch portion 14 is fitted or loosely fitted into the convex portion 10a. , the first printed circuit board 11 has been positioned, but the first printed circuit board 11 can also be positioned simply by fitting or loosely fitting the notch 14 into the protruding strip 10a; in this case, the diameter of the stepped boss 6 The small portion 6a is not required, and the structure is simple.

FIG. 3 is a diagram showing the structure of another embodiment showing a modification of the claw portion 9a of the support piece 9.
First and second protrusions 16a and 17a are formed from the engagement surface 9b toward the base, and the lower surfaces thereof are the first and second engagement surfaces 16b and 17b.

According to this embodiment, the first engaging surface 9 of the claw portion 9a
b, the first of the first and second protruding portions 16a, 17a;
Three printed circuit boards can be supported by the second engaging surfaces 16b and 17b.

[Effects of the invention] (a) Two (or more) first and second printed circuit boards 11 and 12 are arranged in layers and supported at different support positions (in the axial direction of the stepped boss 6). be able to. (b) If the supporting position of the printed circuit board is changed due to a change in the model number of the electrical equipment or a design change, either one of the support structures for the first and second printed circuit boards 11 and 12 is changed. By using this support structure, it is possible to support printed circuit boards at different support positions (in the axial direction of the stepped boss 6) with one holder 5, that is, by using the holder 5 in common.

(c) It is possible to reduce the need for molds for integrally molding the holder and support piece, which is required in the conventional example in which the support structure is added.

(d) Since the holder 5 can be used as a common part, the number of parts such as holders and molds can be reduced.
It also reduces costs in terms of parts management.

[Brief explanation of the drawing]

1 and 2 are diagrams showing the structure of a printed circuit board mounting device of the present invention, FIG. 3 is a diagram showing the structure of another embodiment of the same, and FIG. 4 is a diagram showing the structure of a conventional printed circuit board mounting device. FIG. 5...Holder, 6...Stepped boss, 6a...Small diameter part, 6b...Middle diameter part, 6c...Large diameter part, 7...
First step, 8...Second step, 9...Support piece,
9a...claw portion, 9b...first engagement surface, 10a...
...Convex strip, 10b...Second engagement surface, 11...First printed board, 12...Second printed board, 13...
...Small hole, 14...Notch, 15...Large hole.

Claims (1)

[Scope of utility model registration request] It consists of a middle diameter part 6b and a large diameter part 6c at a predetermined position in the central part, a first step part 7 is provided by the middle part 6b, and a second step part 8 is provided by the large diameter part 6c. The stepped boss 6 is integrally formed, and a protrusion is formed at the end portion from the first engaging surface 9b of the claw portion 9a toward the root, and the lower surface thereof is the second engaging surface 10b. A holder 5 integrally formed with a supporting piece 9 consisting of a strip 10a, and a first holder 5 having a notch 14 that fits or loosely fits into the protruding strip 10a at a position corresponding to the supporting strip 9 on the peripheral edge. printed circuit board 11, and a large-diameter portion 6 having a diameter larger than the diameter center portion 6b of the stepped boss 6 at a position corresponding to the stepped boss 6.
and a second printed circuit board 12 in which a large hole 15 with a diameter smaller than c is formed, and the first printed circuit board 11 is brought into contact with the first step 7, and the notch 14 is connected to the support piece. The first printing board 11 is engaged with the first engaging surface 9b of the claw part 9a and supported by the holder 5, and The small diameter portion 6a and the middle diameter portion 6b of the stepped boss 6 are inserted into the large hole 15 of the board 12 to bring the second printed board 12 into contact with the second stepped portion 8, and the second printed board 12 is brought into contact with the second stepped portion 8. A printed board mounting device in which the second printed board 12 is supported by the holder 5 by engaging the printed board 12 with the second engaging surface 10b of the protruding portion 10a.