JP3022813B2 - Snap mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a snap mounting structure for mounting a base on a substrate.

[0002]

2. Description of the Related Art Conventionally, when mounting electric parts or the like on a substrate, a snap attached to a base such as a clamp is inserted into a snap insertion hole formed in the substrate, and the base is mounted on the substrate. It is known to fix.

In this regard, for example, Japanese Utility Model Publication No. 2-7505
In this publication, a snap 105 having the structure shown in FIG. 6 is disclosed. The snap 105 is attached from the base 104 to the substrate 10.
It has a support leg 106 protruding toward the 0 side, and a pair of arrow-shaped check pieces 108, 108 extending from the tip 107 of the support leg 106 toward the base 104, and a pair of check pieces 108, 108.
108 is formed to be symmetrical with respect to the center line of the support leg 106.

[0004] Such a snap 105 is inserted into a snap insertion hole 101 of the substrate 100, and a pair of check pieces 10 is inserted.
8 and 108 are brought into contact with the holes 101 and the check pieces 108 and 10
The base 104 is fixed to the substrate 100 by urging the check pieces 108, 108 outward by the elasticity of 8 to elastically lock the tapers 108 a, 108 a with the opening periphery of the hole 101.

[0005]

Here, in the snap 105, since the tapers 108a, 108a and the peripheral edge of the opening of the hole 101 are merely elastically locked, a relatively small vertical force is applied in FIG. There is a risk that the taper 108a, 108a may slide around the opening edge of the hole 101 and rattle due to the addition.

For this purpose, as shown in the reference diagram of FIG.
It is conceivable to provide a step portion at a place where the taper 108a, 108a is locked with the opening periphery of the hole 101. That is, the steps 108b, 108b of the check pieces 108, 108
Is elastically engaged with the peripheral edge of the opening of the hole 101, so that the engagement state is maintained without rattling.

However, as described above, the step 108
When b and 108b are provided, the thickness of the substrate on which the snap can be used is limited to one type, so that it is necessary to produce a snap for each substrate thickness, which causes a new problem that the manufacturing cost increases. Was. In view of this point, for example, as shown in the reference diagram of FIG. 8, a spring 110 for urging the base 104 and the substrate 100 so as to be separated from each other is provided.
It is also conceivable to provide it on the back surface of. In this case, the thickness of the substrate is slightly changed so that the steps 108 of the check pieces 108
The spring 110 absorbs the gap even if a gap is formed between the opening b and the opening edge of the hole 101.

However, when such a spring 110 is provided, the overall shape becomes large in the vertical and horizontal directions,
There was a problem that it could not be installed in a small space. The present invention has been made in view of such a problem, and an object of the present invention is to provide a snap mounting structure that can be securely mounted on substrates having two different thicknesses. It is another object of the present invention to provide a snap mounting structure that can meet a demand for space saving.

[0009]

Means for Solving the Problems and Effects of the Invention According to the first aspect of the present invention, there is provided a support leg projecting downward from a lower surface of a base, and a support leg extending from a tip of the support leg. A first and a second check piece extending so as to present one arrow shape toward the base;
(2) When the check piece is inserted into the through hole formed in the board, it will be elastic.
A slit that deforms and engages with the opening edge of the through hole at the stepped portion
In a snap mounting structure having a pair of naps, each of the snaps has a length from a lower surface of the base to a step portion of the first check piece and a length from a lower surface of the base to a step portion of the second check piece. Are formed to have different lengths.

According to the first aspect of the present invention, when each of the pair of snaps is inserted into each of the pair of through holes formed in the substrate having a thickness of t1, the first and second check pieces of each snap are elastic. Deform. At this time, the step of the first check piece of each snap is elastically engaged with the peripheral edge of the opening of the through hole.

On the other hand, when each of the pair of snaps is inserted into each of the pair of through holes formed in the substrate having a thickness t2, the first and second check pieces of each snap are elastically deformed. At this time, the step of the second check piece of each snap is elastically engaged with the opening periphery of the through hole. As described above, according to the first aspect of the present invention, there is obtained an effect that it can be securely attached to substrates having two different thicknesses.

According to a second aspect of the present invention, there is provided the snap mounting structure according to the first aspect, wherein the pair of snaps includes the first check piece, the second check piece, and the other snap of one snap. The second check piece and the first check piece are arranged in this order in one direction.

According to the second aspect of the present invention, when each of the pair of snaps is inserted into each of the pair of through holes formed in the substrate having the thickness t1, the first and second check pieces of each snap are elastic. Deform. At this time, the step of the first check piece of each snap is elastically engaged with the peripheral edge of the opening of the through hole. Here, the pair of snaps is arranged such that the first check piece and the second check piece of one snap and the second check piece and the first check piece of the other snap are arranged in one direction. The direction of the elastic force exerted by the step of the first check piece of one snap on the opening periphery of the through hole and the direction of the elastic force exerted by the step of the first check piece of the other snap on the opening periphery of the through hole. Goes in the opposite direction. For this reason, the base is securely locked in the pair of through holes provided in the substrate.

On the other hand, when each of the pair of snaps is inserted into each of the pair of through holes formed in the substrate having the thickness t2, the first and second check pieces of each snap are elastically deformed. At this time, the step of the second check piece of each snap is elastically engaged with the opening periphery of the through hole. Also in this case, the direction of the elastic force exerted by the step of the second check piece of the one snap on the opening periphery of the through hole and the elasticity exerted by the step of the second check piece of the other snap on the opening periphery of the through hole. Since the directions of the forces are opposite to each other, the base is securely locked in the pair of through holes provided in the substrate.

As described above, according to the second aspect of the present invention,
The effect of being able to be securely attached to substrates of two different thicknesses is obtained. The invention according to claim 3 is the snap mounting structure according to claim 1, wherein the pair of snaps is
The length of the snap to the first check piece and the tip of the second check piece is formed to be the same length.

According to the third aspect of the present invention, when each of the pair of snaps is inserted into each of the pair of through holes formed in the substrate having a thickness of t1, the first and second check pieces of each snap are elastic. Deform. At this time, the step of the first check piece of each snap is elastically engaged with the peripheral edge of the opening of the through hole. Also,
Since the second check piece is accommodated in the through hole, it remains elastically deformed and exerts an elastic force on the wall of the through hole. As described above, since both the first check piece and the second check piece exert an elastic force on each through hole, not only when both snaps are arranged symmetrically, but also when both snaps are symmetrical. , The base is securely locked in the pair of through holes provided in the substrate.

On the other hand, when each of the pair of snaps is inserted into each of the pair of through holes formed in the substrate having the thickness t2, the first and second check pieces of each snap are elastically deformed. At this time, the step of the second check piece of each snap is elastically engaged with the opening periphery of the through hole. Further, since the first check piece is still accommodated in the through hole, it remains elastically deformed and exerts an elastic force on the inner wall of the through hole. As described above, since both the first check piece and the second check piece exert an elastic force on each through hole, not only when both snaps are arranged symmetrically, but also when both snaps are symmetrical. , The base is securely locked in the pair of through holes provided in the substrate.

According to the third aspect of the present invention,
The effect of being able to be securely attached to substrates of two different thicknesses is obtained. The invention according to claim 4 is the invention according to claim 1.
The snap mounting structure according to any one of the above-mentioned items, wherein the pair of snaps, each of which has a spacer, a clamp, and a guide rail on the base, are integrally formed of synthetic resin.

According to the invention of claim 4, claims 1 to 1 are provided.
In addition to the effect of any one of (3), since it is molded with a synthetic resin, it can be easily molded, and the check piece can easily have elasticity.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. [First Embodiment] FIG. 1 is a front view showing a snap mounting structure of a first embodiment, and FIG. 2 is a perspective view of the same. In the first embodiment, as shown in FIGS. 1 and 2, snaps 10, 20 attached to the base 2 are inserted into through holes H, H for snap insertion formed in the substrate 5, This is a snap mounting structure 1 for fixing the base 2 to the substrate 5.

In the snap mounting structure 1, a base 2 and a pair of snaps 10, 20 are integrally formed of synthetic resin.
The snaps 10 and 20 are attached to the lower surface 3 of the base 2 at predetermined intervals in parallel so as to be symmetrical with respect to the symmetry line L.

The snap 10 has a support leg 11 projecting downward from the lower surface 3 of the base 2 and a single arrow shape (see FIG. 1) from the tip 12 of the support leg 11 toward the base 2 . The first and second check pieces 14 and 15 are extended. The first and second check pieces 14 and 15 are formed in a shape bent from the distal end 12 of the support leg 11 toward the base 2,
The check piece 14 is formed to be longer than the second check piece 15. Further, the first check piece 14 is provided with a taper 14 a so as to become thinner toward the tip 16, and a step 18 is provided near the tip 16. Similarly, the second Gyakutomehen 15, taper 15a is set vignetting so tapered toward the distal end 17, and a step portion 19 is provided near the tip 17. Here, the step portions 18 and 19 are formed at about 100 to 130 ° so that the step angle (the angle formed by the two surfaces forming the step) is obtuse. Further, the length from the lower surface 3 of the base 2 to the step 18 of the first check piece 14 is equal to the length of the second check piece 1 from the lower face 3 of the base 2.
5 is formed to be shorter than the length up to the step portion 19.

The first and second check pieces 14 and 15 have elasticity. For example, the tip 16 (or the second
When the tip 17) of the check piece 15 is pressed so as to approach the support leg 11, it bends accordingly, and when the pressure is released, it returns to the original state. The snap 20 has the same configuration as the snap 10, and has a support leg 21 protruding downward from the lower surface 3 of the base 2, and extends from the distal end 22 of the support leg 21 toward the base 2 so as to exhibit an arrow shape. The first and second check pieces 24 and 25 are provided. The first check piece 24 has a taper 24 a and a step 28 near its tip 26, and the second check piece 25 has a taper 25 near its tip 27.
a and a stepped portion 29. Since each part of the snap 20 is the same as the snap 10, the description thereof is omitted.

The snaps 10 and 20 are mounted on the lower surface 3 of the base 2 in parallel at predetermined intervals so as to be symmetrical with respect to the line of symmetry L.
The first check piece 14, the second check piece 15, the second check piece 25 of the snap 20, and the first check piece 24 are arranged in this order in one direction.

Further, a spacer, a clamp, a guide rail, and the like (not shown) are provided on the base 2. Next, the usage of the first embodiment will be described with reference to FIG. FIG. 3 is an explanatory diagram of a use situation.

As shown in FIG. 3A, in the case of a substrate having a thickness t1 such as the substrate 45, when a pair of snaps 10 and 20 are inserted into the through holes H and H of the substrate 45 from above, an initial state is obtained. , Each check piece 14, 15, 2 of each snap 10, 20
4 and 25 are bent so as to approach the support legs 11 (FIG. 3A).
1). When further inserted, the second check pieces 15 and 25 come out of the through holes H and H. Then the second
The check pieces 15 and 25 return to the original state after restoration. After that, when further inserted, the taper 14 of the first check pieces 14 and 24
a, 24a are in contact with the peripheral edges of the openings of the through holes H, H, and the tapers 14a, 24a slide on the peripheral edges of the openings of the through holes H, H, and finally the step portions 18, 28 and the through holes H, H The periphery of the opening locks. At this time, the first check pieces 14 and 24 are elastically deformed toward the support legs 11 and 21 as compared with the original state (see the two-dot chain line in FIG. An elastic force is exerted on the peripheral edges of the holes H, H. Since the steps 18, 28 are formed at an obtuse angle, the steps 18,
When the lock 28 and the peripheral edge of the opening of the through holes H, H are locked, it is not necessary to push the snaps 10, 20 below the position shown by the solid line in FIG.

Thus, the first check piece 1 of the snap 10
4 and the step 28 of the first check piece 24 of the snap 20 respectively abut against the peripheral edge of the opening of the through hole H, H of the substrate 45, and are directed outward as shown by arrows. The base 2 is firmly fixed to the substrate 45 by being urged. In addition, since the base 2 is caught by the steps 18 and 28 at the periphery of the opening of the through holes H and H, the base 2 does not come out upward.

On the other hand, as shown in FIG.
In the case of a substrate having a thickness t2 as described above, when a pair of snaps 10 and 20 are inserted into the through holes H and H of the substrate 46 from above, the check pieces 14 and 1 of the snaps 10 and 20 are initially provided.
5, 24, and 25 bend so as to approach the support legs 11 and 21 (see a dashed line in FIG. 3B). When further inserted, the tapers 15a, 25a of the second check pieces 15, 25 abut against the peripheral edges of the openings of the through holes H, H.
5a slides along the opening edges of the through holes H, H, and finally the step portions 19, 29 and the opening edges of the through holes H, H are engaged with each other. At this time, the first check pieces 14 and 24 are formed through the through holes H and H
Therefore, it is still elastically deformed toward the support leg 11 side. Also, the second check pieces 15, 25
Is a state in which the support legs 11 and 21 are elastically deformed as compared with the original state (see a two-dot chain line in FIG. 3B), and the elastic force is applied to the periphery of the opening of the through holes H and H. Effect. In addition,
Since the step portions 19 and 29 are formed at an obtuse angle, the snaps 10 and 20 are shown by solid lines in FIG. 3B when the step portions 19 and 29 and the opening edge of the through holes H and H are locked. There is no need to push below the position.

As described above, the second check piece 1 of the snap 10
5 and the step 29 of the second check piece 25 of the snap 20 respectively abut against the peripheral edges of the through holes H, H of the substrate 46 and are attached inward as shown by arrows. By virtue of this, the base 2 is firmly fixed to the substrate 45 as in FIG. In addition, the base 2 is provided with the step portions 19 and 29.
As a result, the hole is caught on the periphery of the opening of the through-holes H, so that it does not come out upward.

According to the first embodiment, it is possible to obtain an effect that it can be securely attached to substrates having two different thicknesses. Further, since there is no spring for urging the base and the substrate so as to be separated from each other, the overall shape of the snap mounting structure is not lengthened in the vertical direction, and an effect that downsizing is realized. . Furthermore, since it is molded with a synthetic resin, it can be easily molded, and the check piece can be easily made elastic.

[Second Embodiment] FIG. 4 is a front view showing a snap mounting structure according to a second embodiment, and FIG. 5 is an explanatory diagram of a use state of the second embodiment. As shown in FIG. 4, the distance between the tip 36 of the first check piece 34 of the snap 30 and the lower surface 3 of the base 2, the distance between the tip 37 of the second check piece 35 and the lower surface 3 of the base 2, Of the first and second check pieces 34 and 35 so that
The lengths up to 6,37 are the same length. Other configurations are the same as those of the first embodiment.

However, the snaps 30, 30 are located on the line of symmetry L
Is not symmetrical with respect to the first
The check piece 34, the second check piece 35, and the first check piece 34 and the second check piece 35 of the other snap 30 are arranged in this order in one direction. Next, the usage of the second embodiment will be described with reference to FIG. FIG. 5 is an explanatory diagram of the use situation of the second embodiment.

As shown in FIG. 5A, in the case of a substrate having a thickness t1 such as the substrate 45, when a pair of snaps 30, 30 are inserted into the through holes H, H of the substrate 45 from above, the initial state is as follows. , Each check piece 34,34,3 of each snap 30,30
5 and 35 are bent so as to approach the support legs (1 in FIG. 5A).
See dotted line). Then, when further inserted, the step portions 39, 39 of the second check pieces 35, 35 are temporarily engaged with the peripheral edges of the openings of the through holes H, H on the way.
5 and 35 slide on the periphery of the opening of the through holes H and H toward the tips 37 and 37, while the step portions 38 and 38 of the first check pieces 34 and 34 are finally formed in the through holes H and H. The periphery of the opening locks. At this time, since the second check pieces 35, 35 are still contained in the through holes H, H, they remain elastically deformed and exert an elastic force on the inner walls of the through holes H, H. In addition, the first check pieces 34, 34 are in a state of being elastically deformed as compared with the original state (see the two-dot chain line in FIG. 5A), and accordingly, the periphery of the opening of the through holes H, H Apply elastic force to As described above, since both the first check piece 34 and the second check piece 35 exert an elastic force on each through hole H, even if the two snaps 30, 30 are not arranged symmetrically, the thickness is reduced. It is firmly fixed to the substrate 45 at t1.

On the other hand, as shown in FIG.
In the case of a substrate having a thickness t2 as described above, when a pair of snaps 30, 30 is inserted from above into the through holes H, H of the substrate 46, the check pieces 34, 3 of the snaps 30, 30 initially.
4, 35, 35 are bent so as to approach the support legs (FIG. 5).
(See the dashed line in (b).) Then, when further inserted, the step portions 39, 39 of the second check pieces 35, 35 finally engage with the opening edges of the through holes H, H. At this time, since the first check pieces 34, 34 are still contained in the through holes H, H, they remain elastically deformed, and the through holes H, H
It exerts an elastic force on the inner wall. Further, the second check pieces 35, 35 are in a state of being elastically deformed as compared with the original state (see the two-dot chain line in FIG. 5B), and accordingly, the opening periphery of the through holes H, H Apply elastic force to As described above, since both the first check piece 34 and the second check piece 35 exert an elastic force on each through hole H, even if the two snaps 30, 30 are not arranged symmetrically, the thickness is reduced. It is firmly fixed to the substrate 46 at t2.

According to the second embodiment, substantially the same effects as in the first embodiment can be obtained. Although the first embodiment of the present invention has been described above, various embodiments can be made without departing from the spirit of the present invention. For example, in the first embodiment,
The first check pieces 14, 24 of the snaps 10, 20 may be referred to as second check pieces, and the second check pieces 15, 25 may be referred to as first check pieces.

In the first embodiment, the snap 1
The arrangement of 0, 20 is determined by the second check piece 1 of the snap 10.
5, the first check piece 14, the first check piece 24 of the snap 20,
The second check pieces 25 may be arranged in this order in one direction.

[Brief description of the drawings]

FIG. 1 is a front view illustrating a main part of a snap mounting structure according to a first embodiment.

FIG. 2 is a perspective view illustrating a main part of the snap mounting structure according to the first embodiment.

FIG. 3 is an explanatory diagram showing a usage state of the snap mounting structure of the first embodiment.

FIG. 4 is a front view illustrating a main part of a snap mounting structure according to a second embodiment.

FIG. 5 is an explanatory diagram showing a usage state of a snap mounting structure according to a second embodiment.

FIG. 6 is an explanatory diagram showing a usage state of a conventional snap mounting structure.

FIG. 7 is an explanatory diagram showing a usage state of the snap mounting structure of the reference example.

FIG. 8 is an explanatory diagram showing a usage state of the snap mounting structure of the reference example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Snap mounting structure, 2 ... Base, 3 ... Bottom of base, 5
... board, H ... through hole, 11, 21 ... support leg, 12, 22
... the tip, 14, 24, 34 ... the first check piece, 15, 25,
35: second check piece, 18, 19, 28, 29, 38, 3
9: Step portion.

Claims (4)

(57) [Claims] 1. A support leg protruding downward from a lower surface of a base, and first and second check pieces extending from a tip of the support leg toward the base so as to form one arrow. And
A through hole formed in the substrate by the first and second check pieces;
When it is inserted into the through hole, it is elastically deformed and
In a snap mounting structure provided with a pair of snaps that engage with each other at a portion , each of the snaps extends from a lower surface of the base to a step portion of the first check piece and a second from a lower surface of the base. A snap mounting structure characterized in that the length of the check piece to the step is different. 2. The pair of snaps includes a first check piece, a second check piece of one snap, a second check piece of the other snap, and the first check piece in this order. The snap mounting structure according to claim 1, wherein the snap mounting structure is arranged so as to be arranged in one direction. 3. The pair of snaps according to claim 1, wherein the snaps have the same length as the first check piece and the tip of the second check piece. Snap mounting structure. 4. The snap mounting structure according to claim 1, wherein said pair of snaps provided with spacers, clamps, and guide rails on said base are integrally formed of synthetic resin. .