JPH0436151Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Field of Application> This invention relates to a spacing holder for joining two plates while maintaining a predetermined distance between their opposing surfaces.

<Prior Art> When a printed circuit board is fixed to a chassis base of an electronic device in joining two plates, it is necessary to join the two plates with a predetermined insulating distance between them.

FIG. 4 shows a conventional spacer used to connect a chassis base and a printed circuit board, in which an insulating spacer 22 with a female thread 21 on the inner periphery is interposed between a chassis base 23 and a printed circuit board 24. Screw the screws 25 and 26 inserted from the chassis base 23 and the printed circuit board 24 into the female threads 21 of the spacer 22, and then
By tightening screws 25 and 26 via the screws 25 and 26, the chassis base 23 and the printed circuit board 24 are connected with a distance H equal to the length of the spacer 22 maintained.

<Problems to be solved by the invention> By the way, the above-mentioned spacing retainer that is connected by screwing in a screw has a spacer 22, a screw 2
5, 26, and washers 27, 27, there are problems in that the number of components is large and expensive, and it takes time and effort to connect them.

Further, due to the use of the metal screws 25 and 26, it is necessary to provide an insulation distance l between the electronic component A and the screw 26, which poses the problem of making it difficult to miniaturize the electronic device.

This idea was made to solve the above problems, and provides a spacing holder for plates that has a small number of parts, can be joined with one touch, and does not require consideration of insulation distance from electronic components. The purpose is to

<Means for Solving the Problems> In order to solve the above problems, this invention uses an electrically insulating cylindrical spacer interposed between the plates, and an electrically insulating connection that passes through the plates and the spacer. The combined shaft consists of a shaft with a notch along the axial direction from one end, a flange around the other end, and a shape that spreads toward the flange on the outer circumferential surface of both sides of the shaft, sandwiching the notch. The spacer is formed by providing a first wedge at the tip and a second wedge at the middle, and the spacer has a length that fits together with the plate material between the flange of the coupling shaft and the second wedge, and It is formed by providing elastic pieces on both sides of one end of a cylindrical body provided with a shaft through-hole along the length thereof, and holding the plate material between the first wedge and the first wedge.

<Operation> Drill an insertion hole for the joint shaft at the joint position of the plate materials, and with the spacer stacked on one of the plates, insert the joint shaft from the insertion hole into the through hole of the spacer, and attach it to the joint shaft through the notch. Utilizing the resulting elasticity, both wedges are forcibly passed through the insertion hole and the through hole, and the second wedge is engaged with the end of the cylindrical body of the spacer, thereby joining the plate material and the spacer.

Next, insert the insertion hole provided in the other plate into the first
When the plate material is pushed through the wedge, the first wedge and the elastic piece of the spacer sandwich the plate material, and the two plate materials are joined with the gap between the spacers interposed therebetween.

<Example> Hereinafter, an example of this invention will be described based on FIGS. 1 to 3 of the accompanying drawings.

As shown in the figure, the spacing holder is constituted by a combination of a spacer 1 interposed between plate materials A and B, and a connecting shaft 11 inserted across both plate materials A and B and the spacer 1.

The coupling shaft 11 has a shaft body 13 formed into a bifurcated shape with a notch 12 provided along the axial direction from one end, and a flange 14 provided around the other end of the shaft body 13. the first wedge 15 and the second wedge 16
It is formed by providing

The first wedge 15 has a second wedge 16 at the tip of the shaft body 13.
are formed in the intermediate part of the shaft body 13 in a tapered shape that widens toward the flange 14 side, and are provided with engaging stepped portions 15a and 16a at the end on the flange 14 side, and the shaft body 13
Both sides of the notch 12 are flat surfaces, whereas the wedges 15 and 16 and the surfaces provided with the wedges are arcuate surfaces centered on the axis.

The spacer 1 is connected to the flange 14 of the coupling shaft 11 and the second
It has a length that fits together with the plate material A between the engaging stepped portions 16a of the wedge 16, and the through hole 2 of the shaft body 13 extends along the axis.
A pair of elastic pieces 4, 4 are protruded from one end of a cylindrical body 3, and the cylindrical body 3 has a rectangular tube shape, with a pair of end faces at opposing positions on one end forming a second wedge 16. The engaging surfaces 3a, 3a are formed, and the elastic pieces 4, 4 protrude upwardly and outwardly from the remaining pair of end surfaces.

Both the spacer 1 and the coupling shaft 11 are formed using electrically insulating synthetic resin, and the shaft body 13 of the coupling shaft 11 has elasticity in the approaching and separating directions due to the notch 12.

For example, one of the plates A and B is a chassis base, the other is a printed circuit board, or both are printed circuit boards, and a shaft 13 is provided at the joint between the plates A and B.
Insertion holes C and D into which the
If the insertion hole D is made into a circular hole as shown in the figure, the coupling axis 1
The directionality of the plate material B with respect to the plate material B is eliminated, and the joining operation can be performed smoothly.

The spacing retainer of this invention has the above-mentioned configuration, and in order to join the plates A and B,
Insertion holes C and D are drilled in advance at the joining position of
On the other hand, the spacer 1 is placed on the insertion hole C of the plate material A, and the shaft body 13 of the coupling shaft 11 is inserted into the insertion hole C and the through hole 2 of the spacer 1 from the lower surface side of the plate material A.

When the first and second wedges 15 and 16 pass through the through hole 2 from the insertion hole C, the shaft body 13 is compressed by the elasticity provided by the notch 12, and the second wedge 16 passes through the through hole 2. When passing through, the second wedge 16 is restored and expanded, and this second wedge 16 engages the engaging surfaces 3a, 3a of the cylinder 3 on the spacer 1, and on the other hand, the plate material A, the spacer 1, and the connecting shaft 11 are fixed.

Next, the second wedge 1 on the shaft body 13 of the joint shaft 11
5 into the insertion hole D of the other plate B. The insertion hole D compresses the shaft body 13 and passes through the first wedge 15. When the insertion hole D passes through the first wedge 15, the shaft body 13 restores and expands, and the plate material B meets the first wedge 15. It is sandwiched between the elastic pieces 4, 4 of the spacer 1, and both plate materials A,
B is fixed.

Note that the plates A and B can also be joined at the same time by interposing the spacer 1 between the plates A and B and inserting the coupling shaft 11 from one plate A to the other plate B. .

Both plate materials A and B are connected at a joint shaft 11 via a spacer 1 as shown in FIGS. 2 and 3, and the distance L between the flange 14 on the joint shaft 11 and the engagement step 15a of the first wedge 15 is secures an insulating space L' between the two plate materials A and B, and prevents the occurrence of wobbling in the bonded state by elastically holding material B between the first wedge 15 and the elastic pieces 4, 4. , board B
It can also accommodate changes in plate thickness.

<Effects> As described above, according to this invention, the plates are joined using a cylindrical spacer and a joining shaft inserted into this spacer, which reduces the number of component parts and reduces manufacturing costs. Connection can be performed simply by inserting the connection shaft, so connection can be performed efficiently with one touch.

Further, since the spacer and the coupling shaft are formed using an electrically insulating material, there is no need to ensure an insulating distance from electronic components, and it is possible to downsize the electronic device.

Further, since the plate material is elastically held between the elastic piece and the first wedge, there is no wobbling in the connection between the two plate materials, and it is possible to cope with changes in the thickness of the plate material.

[Brief explanation of drawings]

FIG. 1 is an exploded perspective view of the spacing retainer according to this invention, and FIG. 2 is a longitudinal sectional front view showing the same connected state.
FIG. 3 is a longitudinal sectional side view of the same as the above, and FIG. 4 is a longitudinal sectional view showing a conventional spacer. 1... Spacer, 2... Through hole, 3... Cylindrical body,
4...Elastic piece, 11...Connection shaft, 12...Notch,
13... Shaft body, 14... Flange, 15... First
Wedge, 16...Second wedge, A, B...Plate material, C,
D...Insertion hole.

Claims (1)

[Scope of utility model registration request] It consists of a combination of an electrically insulating cylindrical spacer interposed between the plates and an electrically insulating coupling shaft that passes through the plates and the spacer. A flange is provided around the other end, and a first wedge at the tip and a second wedge at the middle, which widen toward the flange, are provided on the outer circumferential surfaces of both sides of the shaft body across the notch. ,
The length is such that the plate material fits between the flange of the coupling shaft and the second wedge, and the first wedge is attached to both sides of one end of the cylindrical body having a through hole in the shaft body along the axis center. A spacing holder for plate materials that is formed by providing elastic pieces that sandwich the plate materials.