JPH09321454A - Electronic device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent coming off of a fitting member together with a fitting screw from a device main body. SOLUTION: This electronic device consists of a device main body 31 having a first female screw member 34 to be provided on the side of an opening 33 of a hole 32, into which screw fittings are to be inserted, and a female screw member 37 to be provided on the inner side of the hole 32 at a prescribed distance 36 from the first female screw on the inner side of the hole 32, into which a fitting screw is to be inserted and a second female screw member 37 to be provided on the inner side of the hole 32 at a distance of a prescribed internal 36 from the first female screw in the inner side of the hole 32 and a fitting member 41 where a fitting screw 42, in which a fitting screw 42 being provided with a neck part 45 between a head part 43 and a male part 44 at the chip are inserted into a through hole. In this case, the fitting member 41 is free turnable having the fitting screw 42 as the center so as to be prevented from coming off from the device main body 31 in the state where the mail screw part 44 of the fitting screw is positioned in the interval 36 between the first female screw member and the second female screw member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device in the field of communication or information processing. The electronic device is provided with various indications and locations to be operated from the outside for adjustment, inspection, maintenance, etc., but these locations are operated unnecessarily by persons other than operating personnel. In order to prevent this, a cover or the like is provided to protect it from direct contact with the eyes.

In a place where an electronic device is installed in a place where the environment is relatively good, such as indoors, it is possible to easily operate and inspect by removing the cover. In places where the installation environment is not good, such as facing the street, removing covers etc. will prevent accidental situations such as dropping and loss, in addition to providing safety ropes, etc. Since the mounting screws also require complicated and troublesome measures so that they do not fall, it is necessary to take a simple and reliable measure to prevent them from falling off.

[0003]

2. Description of the Related Art FIG. 20 is a side sectional view of an essential part of a conventional electronic device having the above-described protective measures. In the electronic device 1, a device body 5 including a housing body 2 and a lid 3 for accommodating and protecting electronic / communication circuits and the like is integrally connected by a hinge (not shown), a screw, or the like. In addition,
Members such as internal electronic / communication circuits and wiring materials are not shown in the drawings because they are complicated to illustrate.

A recess 6 is provided on the front side of the lid 3 of the apparatus main body 5, a switch 7 is provided in the recess 6 in this example, and a cover 8 is attached to the surface by an attaching screw 9 to cover the recess 6. I'm hiding.

The housing body 2 and the lid 3 are each formed of a corrosion-resistant aluminum alloy casting, for example, a precision casting by a die casting method. The cover 8 is also a similar metal product, and is all subjected to a suitable surface treatment with corrosion resistance such as painting.

The apparatus main body 5 is provided with a step portion 11 and a recess 12 opening on the upper side surface of the step portion 11. The mounting screw 9 penetrates the lower end side of the cover 8 and the recess 12
Is inserted into the screw insertion hole 14 penetrating the
Is screwed into a screw hole 15 formed in the device body 5.

The mounting screw 9 is provided with a neck portion 18 having a diameter slightly smaller than the root diameter of the screw between the head portion 16 and the male screw portion 17 at the tip, and the neck portion 18 near the male screw portion 17 is provided.
An E-shaped retaining ring (snap ring) 19 is laterally fitted in a groove (not shown) formed in the circumferential direction.

In the illustrated state, the mounting screw 9 has the screw hole 1
The state in which the cover 8 is screwed in and the cover 8 is fastened to the housing body 5 and is attached is shown. A flat washer 21 and a spring washer 22 are fitted to the mounting screw 9,
Sufficient tightening is obtained.

The upper end side of the cover 8 is arranged along the surface of the step 23 provided in the apparatus main body 5 so as to come into contact therewith and be positioned. With the above configuration, by loosening the mounting screw 9, the male screw portion 17 is pulled out from the screw hole 15, the head 16 is separated from the apparatus main body 5, and the cover 8 is rotated around the mounting screw 9. Be free to move. That is, the cover 8 hangs downward on the front side in the drawing, the recess 6 is opened, and the switch 7 can be operated.

After the completion of the predetermined operation of the switch 7, the cover 8
Is rotated to the state shown in the drawing, and the mounting screw 9 is tightened and fixed to restore. When the mounting screw 9 is loosened as described above, the E-shaped retaining ring 19 that does not move in the length direction of the mounting screw 9 moves to the front side of the recess 12 and comes into contact therewith. The screw 9 is prevented from coming out of the device body 5. That is, the cover 8 also does not come off from the apparatus body 5.

As described above, the E-shaped retaining ring 19 only moves in and out of the recess 12 in accordance with the tightening and loosening of the mounting screw 9, and the cover 8 is prevented from coming off with a relatively simple structure. However, since the cover 8 is rotatable, the number of the mounting screws 9 is limited to one at one place.

[0012]

As described above, in order to form the recess 12 on the lower side of the side surface, the mold for die casting is formed in addition to the inner and outer double-sided molds, although the structure is relatively simple. There is a problem that it becomes complicated that requires special mold parts that can move back and forth for use.

Since the E-shaped retaining ring 19 is present in the recess 12, it can be seen from the outside, which may cause the E-shaped retaining ring 19 to be pulled out by mischief or the like. If a maintenance person loosens the attachment screw 9 without noticing that it has been pulled out, there is a possibility that a situation may occur in which the maintenance screw loosens from the device body 5 and falls off together with the cover 8.

In view of the above-mentioned various problems of the prior art, it is an object of the present invention to provide an electronic device which has a good manufacturability and appearance in a retaining structure.

[0015]

In order to achieve the above object, the constituent means of the electronic device of the present invention comprises a first female screw member provided on the opening side of a hole into which a mounting screw is inserted and the inside of the hole. A device main body having a second female screw member provided at a predetermined distance from the first female screw member, and a mounting screw having a neck portion between the head portion and the male screw portion at the tip. A mounting member that is inserted into the through hole and is mounted to the device body by the mounting screw, and a male screw portion of the mounting screw is screwed into a first female screw member of the device body to pass through the male screw portion. Passes between the first female screw member and the second female screw member and is screwed into the second female screw member, whereby the attaching member is attached to the apparatus main body, and the male screw portion is the first female screw member. Female thread member and second
By being located between the mounting screw and the female screw member, the mounting member is rotatable about the mounting screw and is prevented from coming off together with the mounting screw.

By providing a predetermined gap longer than the length of the male screw portion of the mounting screw between the first female screw member and the second female screw member, the screw portion is formed at this gap portion. In the state where the mounting screw is positioned, the mounting screw is pulled out from the main body of the apparatus, unless the male screw portion of the mounting screw is intentionally passed through the portion of the first female screw member to be pulled out, that is, The mounting member is supported by the mounting screw and does not fall off.

The apparatus main body is provided with a first unit which is separate from the apparatus main body.
By providing the female thread member and the second female thread member at a predetermined interval, the external thread portion of the mounting screw can be freely set within the interval for a screw having a relatively small diameter. Since it can be positioned in the state, the position where the continuous loosening operation of the mounting screw should be interrupted can be accurately detected by the idling of the mounting screw in the gap portion.

That is, the first female screw member clearly functions as a retaining screw for the mounting screw, and the second female screw member clearly functions as a fastening screw for the mounting screw.

At least one of the first female screw member and the second female screw member provided in the apparatus body is a screw-type spiral screw member screwed into a spiral groove formed in the inner surface of the hole of the apparatus body. Alternatively, by adopting any one of the embedded female screw members to be embedded in the hole of the apparatus body, a suitable configuration and effect can be obtained.

That is, both the first female screw member and the second female screw member are helical screw members screwed into the spiral groove formed on the inner surface of the hole of the apparatus body, so that the same screwing operation can be performed. It can be done and is efficient.

Both the first female screw member and the second female screw member are embedded female screw members to be embedded in the hole of the apparatus main body so that they can be embedded at the time of molding the apparatus main body or after molding. Embedding can be selected. Further, there is no spiral groove in the gap between the first female screw member and the second female screw member.

By combining the first female screw member and the second female screw member with the spiral female screw member and the embedded female screw member, it is necessary to provide a spiral groove at the interval between them. Disappear.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an electronic device according to the present invention will be described.
A specific embodiment will be described in detail with reference to the drawings by a preferred embodiment based on the constituting means. In order to make it easier to understand,
Throughout the drawings, the same parts are designated by the same reference numerals. Further, in the present invention, the through hole and the non-through hole are all referred to as holes.

FIG. 1 is a side sectional view of a main portion of a first embodiment of an electronic device of the present invention. The first female screw member 34 provided on the opening 33 side of the hole 32 into which the mounting screw of the device main body 31 is inserted and the first female screw member 34 on the inner side 35 of the hole 32 are separated by a predetermined distance (L ₁ ) 36 and a second female screw member 37 provided with a space 36 between them.

This hole 32 has the same pitch as a predetermined pitch corresponding to the nominal diameter of the nominal dimension in the lower hole 38, and tapping is performed by a large-diameter insert coil tap.
2. A spiral groove 39 having a female screw shape is formed on the inner surface.

An insert coil having a hook bent in the diametrical direction at the tip and a notch formed in the bent portion and having a diameter slightly larger than the spiral groove 39, or a helical coil insert (trade name, helisert) is called. The first female screw member 34 and the second female screw member 37 made of stainless steel are screwed into the spiral groove 39.

From the above, although the first and second female screw members 34 and 37 are both screw-type spiral screw members, for convenience of explanation, the first and second screw members will be first described. The female screw member 34 and the second female screw member 37 will be abbreviated.

First, the hook of the second female screw member 37 is supported on the tip of a predetermined screwing tool (neither is shown), and the second female screw member is rotated while rotating the screwing tool in the screwing direction. 37 is inserted along the spiral groove 39.

The second female screw member 37 is elastically contracted and deformed in a pressure contact state with the inner surface of the spiral groove 39 so as to come into close contact therewith, and is inserted sequentially. When the screw reaches the predetermined position on the inside 35 side of the hole 32, the hook is broken and removed at the notch portion by pushing in by rotating the screwing tool in the opposite direction, and the hook is taken out together with the screwing tool. The rotating operation of the screwing tool in the opposite direction acts so that the second female screw member 37 bites into the spiral groove 39 and cannot rotate in the same direction, so that the shape is stable.

A first female screw member 34 similar to the second female screw member 37 is successively inserted in the same manner. The state in which the female screw members 34 and 37 are thus inserted is the state shown in the drawing. The length of the first female screw member 34 is the second
It is shorter than the length of the female screw member 37. This is due to the reason to be described later, but the same length can be arbitrarily set.

In the illustrated state, both female screw members 34, 3 are shown.
The shape of the female screw formed on the inner peripheral surface of 7 corresponds to the pitch together with the nominal diameter of the standard screw, for example.

The spiral groove 39 shown in the drawing is drawn over the entire length for easy understanding, but on the contrary, since it is complicated, the symbols other than the first and second female screw members 34 and 37 are symbols. A state sketched by is shown in FIG. A description will be given below with reference to both figures.

In the through hole of the mounting member 41, between the head portion 43 of the mounting screw 42 and the male screw portion 44 at the tip,
A neck portion 45 having a diameter equal to or smaller than the root diameter of the male screw portion 44 is formed. This mounting screw 42
A flat washer 46 and a spring washer 47 are inserted into the head 43 side of the. In this example embodiment, the head 43 of the mounting screw 42 is a pan head with a cross hole.

The length of the male screw portion 44 is set to L ₂ . The length L ₂ is shorter than the distance L ₁ of the space 36 between the first and second female screw members 34 and 37 on the apparatus body 31 side. That is, L ₁ > L ₂ .

The size of the through hole of the mounting member 41 is simply a size such that the male screw portion 44 can be inserted.
That is, an internal thread may be formed so that the external thread portion 44 can be threadedly passed therethrough.

The operation of the first embodiment having the above configuration will be described below. Referring to FIG. 3, the external thread portion 44 of the mounting screw 42 is screwed into the first female thread member 34 of the apparatus main body 31 and passed through the inside.

In this state, as is apparent from the figure, the male screw portion 44 is located in the space 36 portion which is the intermediate portion between the first female screw member 34 and the second female screw member 37. Since the inner diameter (peak diameter) of the spiral groove 39 is larger than the outer diameter of the male threaded portion 44, the mounting screw 42 moves in the axial direction by a margin (L ₁ -L ₂ ) in the length 36 in the meantime. It is both free and idle. During L ₁ 36 is to be a predetermined distance refers to such a relationship.

The neck portion 45 of the mounting screw 42 is
Since the first female screw member 34 is fitted into the inner diameter of the first female screw member 34, the first female screw member 34 is not supported by the inner diameter and is not greatly inclined. That is, the attachment member 41 is rotatable around the neck portion 45.

Even if the mounting screw 42 is pulled out in the pulling direction without being rotated in the loosening direction, the mounting screw 42 is blocked by the first female screw member 34 and cannot be pulled out. It is prevented from coming off.

Next, referring to FIG. 4, there is shown a state in which the male screw portion 44 of the mounting screw 42 is screwed and tightened into the portion of the second female screw member 37. This state is nothing but that the mounting member 41 is pressed and fixed to the surface of the apparatus main body 31 side by tightening the mounting screw 42.

The reason why the length of the first female screw member 34 may be shorter than the length of the second female screw member 37 is that the second female screw member 37 has the male screw portion 44 of the mounting screw 42. The strength of the first female screw member 34 is sufficient to withstand the tightening force, while the first female screw member 34 has only to withstand the pulling force of the mounting screw 42.
This is because it is sufficient if the length is at least the minimum limit.

However, shortening the length of the first female screw member 34 can shorten the total length of the mounting screw 42, and the depth of the hole 32 can be shortened accordingly.

As described above, the mounting screw 4 according to the present invention and the first and second female screw members 34, 37 on the apparatus main body 31 side cooperate with each other to mount the mounting member 4.
The effect of the fixed state shown in FIG. 4 in which 1 is tightened and the loose state shown in FIG. 3 in which the screw 1 can be rotated around the mounting screw 42 is obtained, and in the loose state, mounting with the mounting screw 42 The member 41 is the device body 3
It is prevented from coming off from the 1 side.

In the present invention, the apparatus main body 31, the mounting member 41, etc. are preferably precision cast products of aluminum alloy materials, for example, die cast products and shell mold cast products. Or synthetic resin molding. It is suitable to be applied to a product whose mechanical strength is not guaranteed even if a female screw is directly formed.

A second embodiment of the electronic device of the present invention will be described with reference to FIG. 5. Only the device main body 31 side is shown in FIG. 5, and the mounting members and mounting screws are shown in FIGS. That part of can be applied as is.

The first female screw member 3 provided on the opening 33 side of the hole 32 into which the mounting screw of the apparatus main body 31 is inserted.
4 and a second female screw member 37 provided on the inner side 35 of the hole 32 with a predetermined distance (L ₁ ) 36 between the first female screw member 34 and the first female screw member 34.

This hole 32 has the same pitch as the predetermined hole corresponding to the nominal diameter of the nominal size in the lower hole 38, and is tapped with a large-diameter insert coil tap to form the hole 3
2. A spiral groove 39 having a female screw shape is formed on the inner surface. According to the present embodiment, since the lower hole 38 is a through hole, there is an effect that cutting chips during tapping are discharged from the end of the through hole. Needless to say, tapping can be performed according to the situation without stopping at the inside 35 side as shown in the figure.

An insert coil having a hook bent in the diametrical direction at the tip and a notch formed in the bent portion and having a diameter slightly larger than the spiral groove 39, or a helical coil insert (trade name, helisert) is called. The first female screw member 34 and the second female screw member 37 made of stainless steel are screwed into the spiral groove 39.

From the above, although the first and second female screw members 34, 37 are both screw-type spiral screw members, the first screw member is simplified for convenience of explanation. Female screw member 34 and second female screw member 37.

First, the hook of the second female screw member 37 is supported on the tip of a predetermined screwing tool (neither is shown), and the second female screw member is rotated while rotating the screwing tool in the screwing direction. 37 is inserted along the spiral groove 39.

The second female screw member 37 is elastically contracted to the inner surface of the spiral groove 39 by being elastically contracted and deformed in a pressed state, and is inserted sequentially. When the screw reaches the predetermined position on the inside 35 side of the hole 32, the hook is broken and removed at the notch portion by pushing in by rotating the screwing tool in the opposite direction, and the hook is taken out together with the screwing tool. The rotating operation of the screwing tool in the opposite direction acts so that the second female screw member 37 bites into the spiral groove 39 and cannot rotate in the same direction, so that the shape is stable.

A first female screw member 34 similar to the second female screw member 37 is successively inserted in the same manner. The state in which the female screw members 34 and 37 are thus inserted is the state shown in the drawing. The length of the first female screw member 34 is the second
The length is shorter than the length of the female screw member 37 as in the previous embodiment, but the same length is also the same.

In the illustrated state, both female screw members 34, 3 are shown.
The shape of the female screw formed on the inner peripheral surface of 7 corresponds to the pitch together with the nominal diameter of the standard screw, for example.

The functions and effects of the mounting member and the mounting screw having the above-mentioned configurations are the same as those in the previous embodiment shown in FIGS. 3 and 4, and therefore, please refer to the above description as well.

A third embodiment of the electronic device of the present invention will be described with reference to FIG. 6. FIG. 6 shows only the device main body 31 side, and the mounting members and mounting screws are the same as in the previous embodiment. 1 to 4 can be applied as they are.

The first female screw member 3 provided on the opening 33 side of the hole 32 into which the mounting screw of the apparatus main body 31 is inserted.
4 and a second female screw member 37 provided on the inner side 35 of the hole 32 with a predetermined distance (L ₁ ) 36 between the first female screw member 34 and the first female screw member 34.

This hole 32 has the same pitch as a predetermined pitch corresponding to the nominal diameter of the nominal size in the lower hole 38, and tapping is performed by a large diameter insert coil tap, and the hole 3
2. A spiral groove 39 having a female screw shape is formed on the inner surface. According to the present embodiment, since the pilot hole 38 is a through hole and has a condition that tapping can be performed from both sides, tapping is performed from both sides by a predetermined length, as shown in the drawing.
That is, the interval 36 can be provided, and the tapping time can be reduced. By providing a large-diameter relief to the portion 49 on the inner side 35 that does not require tapping, the tapping length can be further reduced.

An insert coil having a hook bent in the diametrical direction at the tip and a notch formed in the bent portion and having a diameter slightly larger than the spiral groove 39, or a helical coil insert (trade name, Helisart) is called. The first female screw member 34 and the second female screw member 37 made of stainless steel are screwed into the spiral grooves 39 on both sides.

From the above, although the first and second female screw members 34 and 37 are both screw-type spiral screw members, the first screw member is simplified for convenience of explanation. Female screw member 34 and second female screw member 37.

First, the hook of the second female screw member 37 is supported on the tip of a predetermined screwing tool (neither is shown), and the second female screw member is rotated while rotating the screwing tool in the screwing direction. 37 is inserted along the spiral groove 39 from the end surface on the inner side 35 side.

The second female screw member 37 is elastically contracted and deformed in a pressure contact state with the inner surface of the spiral groove 39 so as to come into close contact therewith, and is inserted sequentially. When the screw reaches the predetermined position on the inside 35 side of the hole 32, the hook is broken and removed at the notch portion by pushing in by rotating the screwing tool in the opposite direction, and the hook is taken out together with the screwing tool. The rotating operation of the screwing tool in the opposite direction acts so that the second female screw member 37 bites into the spiral groove 39 and cannot rotate in the same direction, so that the shape is stable.

A first female screw member 34 similar to the second female screw member 37 is similarly inserted from the opening 33 side of the hole 32. The state in which the female screw members 34 and 37 are thus inserted is the state shown in the drawing. Second female screw member 37
That is, the insertion order of the first female screw member 34 and the first female screw member 34 does not matter. Although the length of the first female screw member 34 is shorter than the length of the second female screw member 37 as in the previous embodiment, the same length is also the same.

In the illustrated state, both female screw members 34, 3 are shown.
The shape of the female screw formed on the inner peripheral surface of 7 corresponds to the pitch together with the nominal diameter of the standard screw, for example.

The operation, effects, and the like of the mounting member and the mounting screw having the above-described configurations are the same as those in FIGS. 3 and 4 in the previous embodiment, so refer to the above description as well. .

FIG. 7 is an external view of a female screw member applied to the present invention. FIG. 7A is a front view and FIG. 7B is a side view. The female screw member 51 has a female screw 52 on the inner surface.
Are formed on the outer surface, and two knurls 53 having a wavy curved shape are formed on the outer surface in different directions. The knurls 53 have a chevron shape in front view and are made of stainless steel or brass.

A fourth embodiment of the electronic device of the present invention to which the female screw member 51 is applied will be described with reference to FIG. 8. FIG. 8 shows only the device main body 31 side, and the mounting member and the mounting screw are shown. As for the above, as in the previous embodiment, the corresponding portions of FIGS. 1 to 4 can be applied as they are.

A first female screw member 51-1 provided on the opening 33 side of the hole 32 into which the mounting screw of the apparatus main body 31 is embedded, and a second female screw member 51 on the inside 35 side of the hole 32.
-2 is the second provided with a predetermined distance (L ₁ ) 36.
And a female screw member 51-2.

In this embodiment, a mode in which the female screw member 51 is press-fitted will be described. Therefore, the prepared hole 5 for press-fitting the female screw member 51 into the hole 32.
5, the inner diameter of the pilot hole 55 is selectively set smaller than the outer diameter of the knurled eye 53.

First, the second female screw member 51-2 is attached to the lower hole 5.
When the knurled eye 53 is pushed into the inner side of the lower hole 55 with an appropriate press device and is press-fitted into the inside, the knurled eye 53 is pushed in and inserted into the inner surface of the pilot hole 55. Fixed in position. .

Then, the first female screw member 51-1 is similarly inserted into the lower hole 55 at a predetermined position on the opening 33 side, as shown in FIG. That is, the predetermined positions of the female screw members 51-1 and 51-2 are fixed in a positional relationship such that the space 36 is L ₁ as shown in the drawing.

The operation of the fourth embodiment having the above configuration will be described below. First, referring to FIG. 3, the reference numeral 34 of the first female screw member is replaced by 51-1, the reference numeral 37 of the second female screw member 37 is replaced by 51-2, and the spiral groove 39 is replaced by the pilot hole 55. I decided to. Mounting screw 42
The male screw portion 44 is attached to the first female screw member 5 of the device main body 31.
It should be in a state of being screwed into 5-1 and passed inside.

The male screw portion 44 is the first female screw member 55-1.
And the second female screw member 55-2 is located in the interval 36 portion which is the middle. Since the inner diameter of the lower hole 55 is larger than the outer diameter of the male screw portion 44, the mounting screw 42 is
The portion can be moved in the axial direction by a margin (L ₁ -L ₂ ) in the length direction, and can be idle. The interval L ₁ 36 is set to a predetermined interval having such a relationship.

The neck portion 45 of the mounting screw 42 is
Since the first female screw member 51-1 is fitted into the inner diameter of the first female screw member 51-1, the inner diameter of the first female screw member 51-1 does not cause a large inclination.
That is, the mounting member 41 is centered around the neck 45,
It is rotatable around its circumference.

Even if an attempt is made to pull out the mounting screw 42 in the pulling direction without rotating it in the loosening direction, the mounting screw 42 is blocked by the first female screw member 51-1 and cannot be pulled out. It is prevented from coming off from 31.

Next, referring to FIG. 4, the same reference numerals will be replaced with each other, and the explanation will be made with reference to FIG.
However, the mounting member 41 is pressed and fixed to the surface of the apparatus main body 31 side by tightening the mounting screw 42 by screwing into the second female screw member 51-2.

The length of the first female screw member 51-1 is set to the second
The length of the second female screw member 51-2 may be shorter than the length of the female screw member 51-2. While sufficient strength is required, the first female screw member 51-1 only has to withstand the pull-out force of the mounting screw 42, and therefore the first female screw member 51-1 may have a minimum length or more, and if necessary, the same. It is also possible to achieve commonality as the length.

However, the first female screw member 51-1
By shortening the length, the total length of the mounting screw 42 can be shortened, and the depth of the hole 32 can be shortened.

As described above, the mounting screw 42 according to the present invention cooperates with the first and second female screw members 51-1 and 51-2 on the apparatus main body 31 side to cooperate with each other. The effect of the fixed state shown in FIG. 4 for tightening and the loosened state shown in FIG. 3 rotatable around the mounting screw 42 can be obtained, and in the loosened state, the mounting member together with the mounting screw 42 is attached. 41 is the device body 3
It is prevented from coming off from 1.

In the present invention, the apparatus main body 31, the mounting member 41, etc. are preferably precision cast products of aluminum alloy materials, for example, die cast cast products and shell mold cast products. Or synthetic resin molding. It is suitable to be applied to a product whose mechanical strength is not guaranteed even if a female thread is directly formed.

In the above-described embodiment of the present invention, the female screw member 51 is used.
For the sake of convenience of description, the description has been made assuming that the device main body 31 is press-fitted and embedded by post-processing, but the present invention is not limited to such a case, and it is of course applicable to embedding the device main body 31 at the same time. Needless to say, however, in this case, the pilot hole is not necessary, and the position is more firmly fixed, which will be easily understood without needing to explain.

However, even if they are embedded at the same time,
If only the second female screw member 51-2 is so configured and the first female screw member 51-1 is press-fitted after molding, the molding die can be simplified.

A fifth embodiment of the electronic device of the present invention to which the female screw member 51 is applied will be described with reference to FIG. 10. FIG. 10 shows only the device main body 31 side. As for the screw, as in the previous embodiment, the corresponding portions of FIGS. 1 to 4 can be applied as they are.

A first female screw member 51-1 provided on the opening 33 side of the hole 32 in which the mounting screw of the apparatus main body 31 is embedded, and a first female screw member 51-2 on the inside 35 side of the through hole 32. And a second female screw member 51-2 provided with a predetermined space (L ₁ ) 36 therebetween.

In this embodiment, a mode in which the female screw member 51 is press-fitted will be described. Therefore, the pilot holes 55 for press-fitting the hole 32 female screw members 51 are formed at predetermined depths from both surfaces. This pilot hole 55
The inner diameter of is selectively smaller than the outer diameter of the knurled eye 53.

The intermediate portion where the pilot holes 55 are formed on both sides has a predetermined gap 36, and this portion is a gap hole 57 having an inner diameter slightly larger than the female screw 52 of the female screw member 51 and at both end portions thereof. A step surface 58 is formed with respect to the pilot hole 55.

First, the second female screw member 51-2 is attached to the inside 3
When the knurled eye 53 is pushed into the inner surface of the lower hole 55 while being inserted into the lower hole 55 on the fifth side with a proper press device, the positioning is stopped by contacting the step surface 58. The position of the knurled eye 53 is fixed in a state of being bitten.

Then, the first female screw member 51-1 is similarly inserted into the lower hole 55 on the side of the opening 33 so as to be in contact with the step surface 58. Fixed. That is, the interval 36 is automatically
(L ₁ ) is set.

The insertion order of the first and second female screw members 51-1 and 51-2 is not limited to the above, but can be arbitrarily performed. According to this embodiment, in addition to the insertion position of the female screw member 51 being set by the step surface 58, the second female screw member 51
-2, the tightening force is received and supported by the step surface 58 against the tightening of the mounting screw 42, so that a strength comparable to that at the time of embedding at the same time can be obtained.

FIG. 11 shows a sixth embodiment of the electronic device of the present invention, and only the device body 31 side is shown. As for the attachment member and the attachment screw, the corresponding portions of FIGS. 1 to 4 can be applied as they are, as in the previous embodiment.

Referring to FIG. 9A, a first female screw member 51 (not shown) provided on the opening 33 side of the hole 32 into which the mounting screw of the apparatus main body 31 is inserted, and a first female screw member 51 on the inside 35 side of the hole 32 are provided. A predetermined distance (L ₁ ) from the first female screw member 51
And a second female screw member 37 provided with a space 36 between them.

The hole 32 is provided with a lower hole 38 on the inner side 35, and the lower hole 38 has a predetermined pitch corresponding to the nominal diameter of the nominal size and is tapped with a large-diameter insert coil tap. Then, a spiral groove 39 having a female screw shape is formed on the inner surface of the hole 32. The portion where the spiral groove 39 is formed and the intermediate portion where the first female screw portion 51 on the opening 33 side is inserted are gap holes 59 corresponding to the groove diameter of the spiral groove 39.

An insert coil having a hook bent in the diametrical direction at the tip and a notch formed in the bent portion and having a diameter slightly larger than the spiral groove 39, or a helical coil insert (trade name, helisert) is called. The second female screw member 37 made of stainless steel is
Screw into 9. Such a second female screw member 37 is a screw-in type spiral screw member, but for convenience of description, it will be simply referred to as the second female screw member 37.

While the hook of the second female screw member 37 is supported on the tip of a predetermined screwing tool (neither is shown), the screwing tool is rotated in the screwing direction,
The second female screw member 37 is inserted along the spiral groove 39.

The second female screw member 37 is elastically reduced and deformed in a pressure contact state with the inner surface of the spiral groove 39 so as to come into close contact therewith, and is inserted sequentially. When the screw reaches the predetermined position on the inside 35 side of the hole 32, the hook is broken and removed at the notch portion by pushing in by rotating the screwing tool in the opposite direction, and the hook is taken out together with the screwing tool. The rotating operation of the screwing tool in the opposite direction acts so that the second female screw member 37 bites into the spiral groove 39 and cannot rotate in the same direction, so that the shape is stable.

On the opening 33 side of the hole 32, the (embedded type) female screw member shown in FIG. 7, that is, the first female screw member 51 in the present embodiment, is provided on the opening 33 side of the hole 32. A pilot hole 55 having a predetermined depth for press-fitting the first female screw member 51 is formed. The inner diameter of the pilot hole 55 is selectively set smaller than the outer diameter of the knurled eye 53. As a result, a step surface 58 is formed at the boundary with the spacing hole 59.

When the first female screw member 51 is pushed into the lower hole 55 by an appropriate press device and press-fitted, the knurled eye 53 is pushed into the inner surface of the lower hole 55 while being inserted into the lower hole 55, and is brought into contact with the step surface 58. Be positioned.

This state is as shown in FIG. 6B, and the position is fixed in a state where the knurled eye 53 bites. That is, the positions of the female screw members 37 and 51 are fixed so that the space 36 is L ₁ as shown in the drawing.

The operation and effect of the mounting member and the mounting screw having the above-mentioned constitutions are the same as those in the previous embodiment shown in FIGS. 3 and 4, and therefore, please refer to the above description as well. In addition, tapping can be performed according to the situation without stopping at the inside 35 side as shown in the figure. However, according to the present embodiment, the screwing length of the second female screw member 37 can be shortened only on the inner side 35 side, so that the screwing operation time can be shortened.

FIG. 12 is a side sectional view of the essential portions of a seventh embodiment of the electronic device of the present invention. In the electronic device 61, a device main body 65 including a housing main body 62 and a lid 63 for accommodating and protecting electronic / communication circuits and the like is integrally connected by a hinge (not shown), a screw or the like. It should be noted that internal members such as electronic / communication circuits and wiring members are not shown in the drawing because they are complicated in the drawing.

A recess 66 is provided on the front side of the lid 63 of the apparatus main body 65.
Provided, in this example, a switch 67 is provided, a mounting member 68 which is a cover is mounted on the surface by a mounting screw 42, and the recess 66 is covered.

The case body 62 and the lid 63 are each formed of a corrosion-resistant aluminum alloy casting, for example, a precision casting product by a die casting method. The mounting member 68 is also a similar metal product, and is all subjected to an appropriate corrosion-resistant surface treatment such as painting.

A first female screw member 34 provided on the opening 33 side of the hole 32 into which the mounting screw 42 of the apparatus main body 65 is inserted, and a first female screw member 34 on the inner side 35 of the hole 32.
Has a second female screw member 37 provided at a predetermined distance (L ₁ ) 36 from each other.

This hole 32 has the same pitch as the predetermined hole corresponding to the nominal diameter of the nominal size in the lower hole 38, and is tapped with a large-diameter insert coil tap.
2. A spiral groove 39 having a female screw shape is formed on the inner surface.

An insert coil having a hook bent in the diametrical direction at the tip and a notch formed in the bent portion and having a diameter slightly larger than the spiral groove 39, or a helical coil insert (trade name, helisert) is called. The first female screw member 34 and the second female screw member 37, which are screw type spiral screw members made of stainless steel, are screwed into the spiral groove 39.

In the through hole of the attachment member 68, a neck portion between the head portion 43 of the attachment screw 42 and the male thread portion 44 at the tip is equal to or smaller than the root diameter of the male thread portion 44. Forty-five parts are inserted. A flat washer 46 and a spring washer 47 are inserted on the head 43 side of the mounting screw 42.

The length of the male screw portion 44 is set to L ₂ , and the first and second female screw members 3 on the apparatus main body 65 side are provided.
L ₁ > L ₂ which is shorter than L ₁ during the interval 36 of 4,37.

The above is the same as that of the first embodiment of the present invention shown in FIGS. 1 to 4, so refer to the above description together with the drawings. The reference numeral 65 of the device main body 31 is
It should be understood that the reference numeral of the mounting member 41 is replaced with 68.

The state of FIG. 12 is the state shown in FIG. 4, in which the mounting screw 42 is tightened and the mounting member 68 is in pressure contact with the apparatus main body 65. It is well shown in FIG. 13 that the periphery of the attachment member 68 is fitted and positioned on the surface of the apparatus main body 65 and the step surface 69 around the recess 66.

Further, as shown in FIG. 13, with respect to the mounting member 68, the mounting screw 42 is provided only at one location in the lower central portion thereof. With the above configuration,
From the state shown in FIG. 12, loosen the mounting screw 42,
As shown in FIG. 3, by locating the screw portion 44 in the space 36 portion, the mounting member 68 is lifted from the step surface 69, and becomes rotatable around the neck portion 45 of the mounting screw 42. It is possible to open the recess 66 and operate the switch 67, which is the operation portion, by moving the position to the position 68 'indicated by the two-dot chain line in the direction of the arrow.

After the predetermined operation is completed, the mounting member 68 is rotated to the position of the step surface 69, and the mounting screw 42 is tightened to restore it. Step surface 69 on the device body 65 side
14 will be described with reference to FIG. 14. Positioning will be performed at appropriate two positions in the front view of FIG. 14A and at the device main body 65 side as shown in the sectional view of FIG. Pin 71 is embedded and corresponding mounting member 68
It is preferable that such non-through holes 72 are provided on the side, or through holes 73 are provided as shown in FIG. 7C, and such positioning means are arranged as symmetrically as possible. If the through hole 73 as shown in FIG.
Although the positioning means can be seen from the outer surface, when the non-penetrating hole 72 is formed as shown in FIG. 7B, the positioning means cannot be seen from the outer surface and the appearance is good. This action and effect are not so different from those in FIG.

The hole 32 portion of FIG. 12 is typically shown in FIGS.
Although the thing of FIG. 4 was applied, the thing of 2nd-6th embodiment of this invention shown in FIGS. 5-11 can be applied, although it is not illustrated and detailed description anew, but combining etc. Of course, it can be implemented.

FIG. 15 is a front view (a) and an AA cross-sectional view (b) of a mounting member 75 according to an eighth embodiment of the present invention. Cylindrical protrusions (bosses) 76 are provided at three locations on the surface of the four corners of the mounting member 75, and through holes 77 are provided at one location.

On the rear surface side of the projection 76, there is a concave portion 78 which is to be inserted therein and has a depth slightly larger than a screw diameter described later and which can accommodate a male screw portion, and a female screw on the front surface side. And a screw hole 79 having The back side of the mounting member 75 is a flat plane.

The mounting member 75 is made of the same aluminum alloy as the main body of the apparatus, and is similarly produced by the precision casting method. The mounting member 75 is shown in FIG.
Mounting screws and tightening screws,
And are indicated. The mounting screw 81 includes a neck portion 45 having a diameter smaller than or smaller than the root diameter of the male screw portion 44 between the head portion 43 and the male screw portion 44 at the tip, and a screw portion directly below the head portion 43. A columnar portion 82 having a diameter equal to 44 is formed. The length of the male screw portion 44 is set to L ₂ . Below the mounting screw 81, a flat washer 46 and a spring washer 47 are arranged.

The tightening screw 85 is provided between the head portion 42 and the male thread portion 44 at the tip and is provided just below the neck portion 86 having a diameter equal to or smaller than the root diameter of the male thread portion 44 and the head portion 43. A columnar portion 82 having the same diameter as the male screw portion 44 is formed. As apparent from the figure, the length of the neck portion 86 is set shorter than the length of the neck portion 45 of the mounting screw 81. Below the tightening screw 85 is a plain washer 4.
6 and a spring washer 47 are arranged.

Mounting screw 81 and tightening screw 85
And are attached to the attachment member 75 as shown in FIG. That is, the mounting screw 81 is inserted into the through hole 77 of the mounting member 75 and the tightening screw 85 connects the male screw portion 44 to the screw hole 7 from the front side.
9 is screwed in and passed.

In the state of FIG. (B), the mounting screw 81
Can be inserted into and removed from the through hole 77, and the male screw portion 44 of the tightening screw 85 seems to be accommodated in the recess 78, is blocked by the screw hole 79, and is prevented from coming off as it is.

That is, with respect to the mounting member 75, the mounting screw 81 is inserted at one position, and the tightening screw 85 is screwed and mounted at each of the three protrusions 76.

FIG. 17 shows a front view (a) of a main part and a BB sectional view (b) of a main part of an apparatus body 91 according to an eighth embodiment of the present invention. The apparatus main body 91 in this embodiment basically complies with the seventh embodiment of the present invention shown in FIG.

That is, the recess 6 is formed on the front side of the apparatus body 91.
In this example, a switch 67 is provided, and a flat step surface 93 is provided on the peripheral surface of the recess 66, four holes at the four corners of the step surface 93, a hole 32 at one lower left position, and screw holes at three other positions. 95, and are provided. In addition, the step surface 9 is provided inside the recess 66 so as to avoid the hole 32 and the screw hole 95.
3, a groove 96 and an O-ring gasket 97 made of synthetic resin rubber are inserted and arranged in the groove 96.

The method of forming the screw holes 95 is as follows. First, the non-penetrating pilot hole 101 has the same pitch as the predetermined pitch corresponding to the nominal diameter of the nominal size, and tapping is performed with a large-diameter insert coil tap, and the inner surface is tapped. Female thread-shaped spiral groove 102
To form

Then, an insert coil or a helical coil insert (trade name, Helisart) having a hook bent in the diametrical direction at the tip and a notch formed in the bent portion and having a diameter slightly larger than the spiral groove 102 is provided.
It is formed by screwing a female screw member 103, which is a screw-type spiral screw member made of stainless steel referred to as, into the spiral groove 102.

Hole 32 into which mounting screw 81 is screwed
12 is the same as the configuration of the corresponding portion in FIG. 12, and the first female screw member 34 is on the opening 33 side, the second female screw member 37 is on the inner side 35, and a predetermined interval (L ₁ ) between them.
36 are provided.

FIG. 18 shows an essential part of an eighth embodiment of the electronic device of the present invention in a sectional view taken along the line CC of FIG. 17A. The drawing shows a state in which the attachment member 75 is attached to the apparatus main body 91 and is fixed in a pressed state.

The mounting member 75 is in the state shown in FIG. 16 (b), and the mounting screw 81 is screwed into the hole 32 of the apparatus main body 91 and tightened. It is the state shown.

Further, the tightening screw 85 is the device main body 91.
It is in a state in which it is screwed into the screw hole 95 and is tightened. Therefore, the O-ring gasket 97 is compressed and elastically deformed in the concave groove 96 on the back surface side of the mounting member 75, and is pressed flat between both surfaces, so that the recess 66 is kept watertight or airtight with the outside.

With the above construction, by loosening the tightening screw 85 and removing it from the screw hole 95, the male screw portion 44 is positioned in the recess 78 of the mounting member 75. The external thread portion 44 is located at the interval 36 by loosening the mounting screw 81 to a position where it is removed from the second female thread member 37. This state is the same as that shown in FIG.

A through hole 77 of the mounting member 75 is supported by the neck portion 45 of the mounting screw 81 so as to penetrate therethrough.
It can be lifted up and separated from the stepped surface 93. That is, it becomes possible to rotate about the mounting screw 81.

Therefore, as shown in FIG. 19, when the mounting member 75 is rotated downward to the position 71 ', the recess 66 can be opened and the switch 67, which is the operating portion, can be operated.

When the predetermined operation has been completed, the mounting member 75 is rotated to tighten and restore the state of FIG. 18 to complete the operation. Mounting screw 81, tightening screw 8
5, the columnar portion 82 is provided with a flat washer 46 and a spring washer 47.
This is to prevent a large deviation from the center of the head portion 43 of the screw due to the fact that it fits into the neck portion 45 having a small diameter. Will be things. Such a thing can be naturally applied to each of the other previous embodiments.

According to the eighth embodiment of the present invention, since the mounting member 75 is mounted with the plurality of tightening screws 85, it is possible to stably mount a member having a relatively large area.

The present embodiment is effective when applied to those requiring the O-ring gasket 97, but it is not limited to the combination with the O-ring gasket, and is not always necessary. The embodiment in which the tightening screw is used in combination is also effective for those without.

The hole 32 portion of FIG. 18 is typically shown in FIGS.
Although the thing of FIG. 4 was applied, the thing of 2nd-6th embodiment of this invention shown in FIGS. 5-11 can be applied, although it is not illustrated and detailed description anew, but combining etc. Of course, it can be implemented.

INDUSTRIAL APPLICABILITY The present invention can be applied to a mounting screw having a relatively small diameter that cannot be bored, for example, a screw diameter of 12 mm or less, preferably about several mm. .

As described above, the respective embodiments of the present invention are not applied to products made of aluminum alloy, but can be applied to other synthetic resin molded products and the like. Also, the attachment member is not limited to the lid or the cover, and the main part is opened as necessary,
Alternatively, it goes without saying that the invention can be applied to a place where it is necessary to remove them and prevent them from coming off from the apparatus body.

[0136]

As described above in detail, according to the electronic device of the present invention, the first female screw member provided on the opening side of the hole into which the mounting screw is inserted and the first female screw member on the inner side of the hole are provided. The device main body having a second female screw member provided at a predetermined distance from the first female screw member, and a mounting screw having a neck portion penetrating between the head portion and the male screw portion at the tip end penetrates. A mounting member that is inserted into the hole and is mounted on the device body by the mounting screw, and the male screw portion of the mounting screw is screwed into and passed through the first female screw member of the device body so that the male screw portion is by being screwed into the second female screw member, the attachment member is fixedly mounted to the apparatus main body, the male screw portion is first, by ₁ is the possible between the second internally threaded member, screw mounting attachment member Freely rotatable around the With this configuration, the mounting screw will not come out of the main body of the device unless the threaded portion is intentionally removed from the first female screw member. Supported.

By providing a female screw member separate from the apparatus main body at a distance, the external thread of the mounting screw can be positioned freely within the distance with respect to the screw having a relatively small diameter. It is possible to reliably detect the state in which the continuous loosening operation of the mounting screw should be interrupted by the idling of the mounting screw.

As described above, the first female screw member clearly functions as a retaining screw for the mounting screw, and the second female screw member clearly functions as a fastening screw for the mounting screw. Further, at least one of the first female screw member and the second female screw member provided in the device body is a screw-type spiral screw member that is screwed into a spiral groove formed on the inner surface of the hole of the device body, or Alternatively, the first female screw member and the second female screw member can be formed by using one of the embedded female screw members embedded in the hole of the apparatus body.
In both cases, by using a spiral screw member that is screwed into a spiral groove formed on the inner surface of the hole of the apparatus body, the same screwing operation can be performed.

The first female screw member and the second female screw member are
In both cases, by using an embedded type female screw member that is embedded in the hole of the apparatus body, it is possible to select to embed the apparatus body at the time of molding or after the molding. By combining the first female screw member and the second female screw member with the spiral female screw member and the embedded female screw member, respective mutual characteristic actions and effects can be obtained.

As described above, according to the present invention, various practical effects are extremely remarkable.

[Brief description of drawings]

FIG. 1 is a side sectional view of an essential part of an electronic device first embodiment according to the present invention.

FIG. 2 is a side sectional view (No. 1) of a main part of an electronic device first embodiment according to the present invention.

FIG. 3 is a side cross-sectional view (No. 2) of a main part of the electronic device first embodiment according to the present invention.

FIG. 4 is a side sectional view (No. 3) of a main part of the electronic device first embodiment according to the present invention.

FIG. 5 is a side sectional view of the main part of the device body in the second embodiment of the electronic device of the present invention.

FIG. 6 is a side sectional view of a main part of an apparatus main body according to a third embodiment of the electronic apparatus of the present invention.

FIG. 7 is an external view of a (embedded type) female screw member applied to the present invention.

FIG. 8 is a side cross-sectional view (No. 1) of the main part of the device body in the fourth embodiment of the electronic device of the present invention.

FIG. 9 is a side cross-sectional view (No. 2) of the main part of the device body in the fourth embodiment of the electronic device of the present invention.

FIG. 10 is a side sectional view of a main part of an apparatus main body in an electronic apparatus fifth embodiment of the present invention.

FIG. 11 is a side sectional view of a main part of an apparatus main body in an electronic apparatus sixth embodiment according to the present invention.

FIG. 12 is a side sectional view of an essential part of an electronic device seventh embodiment according to the present invention.

13 is a front view of a main part of FIG.

FIG. 14 is a front view and a partial cross-sectional view of a main part of an embodiment different from FIG.

FIG. 15 is a mounting member (No. 1) according to an electronic device eighth embodiment of the invention.

FIG. 16 is a mounting member (No. 2) according to the eighth embodiment of the electronic device of the present invention.

17A and 17B are a front view and a cross-sectional view of a main part of a device body in an electronic device eighth embodiment of the invention.

FIG. 18 is a side sectional view of an essential part of an electronic device eighth embodiment according to the present invention.

FIG. 19 is an operation explanatory view of the electronic device eighth embodiment of the present invention.

FIG. 20 is a side sectional view of a main part of a conventional electronic device.

[Explanation of symbols]

 31 Device Main Body 32 Hole 33 Opening 34 First Female Screw Member 35 Inside 36 Spacing, Space 37 Second Female Screw Member 38 Lower Hole 39 Spiral Groove 41 Mounting Member 42 Mounting Screw 43 Head 44 Male Thread 45 Neck 46 Plain washer 47 Spring washer 49 Part 51 Female screw member 51-1 First female screw member 51-2 Second female screw member 52 Female screw 53 Knurled eye 55 Lower hole 57 Interval hole 58 Step surface 59 Interval hole 61 Electronic device 62 housing body 63 lid 65 device body 66 recess 67 switch 68 mounting member 69 step surface 71 positioning pin 72 non-penetrating hole 73 through hole 75 mounting member 76 projection 77 through hole 78 concave portion 79 screw hole 81 mounting screw 82 columnar portion 85 Tightening screw 86 Neck 91 Device main body 93 Step surface 95 Screw hole 96 Recessed groove 97 Ring gasket 101 not through under-holes 102 spiral groove 103 female screw member

Claims (2)

[Claims] 1. A first female screw member provided on the opening side of a hole into which a mounting screw is inserted and a first female screw member on the inner side of the hole.
The device body having a second female screw member provided at a predetermined distance from the female screw member, and a mounting screw having a neck portion between the head portion and the male screw portion at the tip is inserted into the through hole. And a mounting member that is mounted to the device body by the mounting screw, and the male screw portion of the mounting screw is screwed into the first female screw member of the device body to pass the male screw portion. The attachment member is attached to the apparatus main body by passing between the female screw member and the second female screw member and being screwed into the second female screw member, and the male screw portion serves as the first female screw member. An electronic device, wherein the mounting member is positioned between the second female screw member and the mounting member so that the mounting member is rotatable about the mounting screw and is prevented from coming off together with the mounting screw. 2. At least one of a first female screw member and a second female screw member provided in the device body is a screw-type spiral screw member that is screwed into a spiral groove formed in the inner surface of the hole of the device body. 2. The electronic device according to claim 1, wherein the electronic device is one of an embedded female screw member embedded in a hole of the device body.