JP2000294962A - Plug-in unit fixing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve attaching and detaching performance of a plug-in unit by providing fixing means for holding the plug-in unit by elastically deforming itself, so as to clamp the plug-in unit squeezed thereinto and facilitating its attaching and detaching operation, so as to prevent the fixing means from hardening over a long period of use by making the fixing means of metal. SOLUTION: In a plug-in unit fixing mechanism 10 for fixing a part of a plug-in unit 14 incorporated in an electronic device 12 to a chassis 16 of the device 12, a fixing means 22 is provided. The means 22 has a receiving part 18, which is biased by the unit 14 with the unit 14 abutting thereagainst in a direction perpendicular to the direction of its thickness and which elastically deforms both ends thereof, in a manner of coming closer to the unit 14 in response to the biasing force of the unit 14, and a pair of pinching parts 20, which is continuous to both ends of the part 18 and clamps the unit 14 by the elastic deformation of the part 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug-in unit fixing mechanism having improved fixing means for fixing a part of a plug-in unit provided in an electronic device to a housing of the electronic device.

[0002]

2. Description of the Related Art In an electronic device mounted in a vehicle, an aircraft, a ship, or the like and used in an environment where vibration and shock are applied, when a unit inside the device is mounted in a plug-in system, each plug-in unit is provided with a plug-in unit. Is easy to fall off and rattle. Therefore, a plug-in unit fixing mechanism is provided in order to prevent the occurrence of the drop-out and play.

For example, in an example shown in FIG. 6, a plug-in unit 1 is mounted on a motherboard 3 mounted on a housing body 2 of an electronic device. Further, a sponge rubber 5 as a plug-in unit fixing mechanism is attached to a position of the cover 4 of the electronic device facing the plug-in unit 1 by bonding. This sponge rubber 5 is shown in FIG.
As shown in FIG. 5, the sponge rubber 5 has a thickness such that the sponge rubber 5 comes into contact with the plug-in unit 1 and deforms when the cover 4 is attached to the housing body 2. For this reason, the cover 4 is
, The sponge rubber 5 is pressed against one end of the plug-in unit 1 to generate a resilient force, which prevents the plug-in unit 1 from dropping out of the motherboard 3 in the insertion / removal direction. . Further, since the plug-in unit 1 is deformed so as to bite into the sponge rubber 5, it is possible to eliminate backlash in a plane direction orthogonal to the insertion / extraction direction.

Further, as another example, the sponge rubber 5 of the above-described example is made of conductive rubber, the plug-in unit is used as a wiring board, and the V-shaped wiring board is inserted into a portion of the conductive rubber which comes into contact with the wiring board. A technique of forming a letter-shaped notch is known (see Japanese Utility Model Laid-Open No. 3-26025). According to this technique, the wiring board can be elastically supported by the conductive rubber, and electrical continuity between the wiring board, the conductive rubber, and the case can be achieved.

As another example of the plug-in unit fixing mechanism, as shown in FIG. 7, a mounting portion 7a for fixing the plug-in unit 7 to the housing 6 is provided, and the mounting portion 7a is fixed to the unit. Attachment part 6a of housing 6 by screw 8
To be fixed. According to this plug-in unit fixing mechanism, the play of the plug-in unit 7 can be eliminated, and the heat generated by the plug-in unit 7 is transmitted to the housing 6 through the mounting portions 7a and 6a, and Electrical conduction with the body 6 can be secured. Further, as shown in FIG. 8, the heat generated by the plug-in unit 7 is transmitted to the housing 6 from each of the mounting portions 7 a and 6 a and is released from the outer surfaces of the housing 6 and the cover 4.

[0006]

However, in the plug-in unit fixing mechanism shown in FIG. 6 described above, one end of the plug-in unit 1 is supported only by the sponge rubber 5, so that the sponge rubber 5 may change due to aging or the like. The plug-in unit 1 may be deformed in a crushed state, and the holding force of the plug-in unit 1 may be weakened. Further, if the portion where the plug-in unit 1 is held has a sharp shape, the sponge rubber 5 may be damaged due to vibration or the like. Further, when electromagnetic shielding or heat radiation of the plug-in unit 1 is required, electrical conduction or heat conduction must be performed between the plug-in unit 1 and the housings 2 and 4, so that the plug-in unit 1 has conductivity or heat conduction. It is necessary to use sponge rubber having properties,
The cost increases.

On the other hand, the plug-in unit fixing mechanism shown in FIGS. 7 and 8 for directly screwing the plug-in unit 7 to the housing 6 requires a complicated screwing operation, so that the detachability of the plug-in unit 7 is poor. I will.

Therefore, the present invention can hold the plug-in unit without rattling for a long period of time,
It is an object of the present invention to provide a plug-in unit fixing mechanism that is excellent in electrical conductivity and thermal conductivity and that can be easily attached and detached.

[0009]

As a technical means for achieving the above-mentioned object, a plug-in unit fixing mechanism according to the present invention includes a part of a plug-in unit provided in an electronic device, and In the plug-in unit fixing mechanism fixed to the housing, the plug-in unit comes into contact with and presses in a direction perpendicular to its thickness direction, and the pressing deforms elastically so that both ends approach the plug-in unit. A fixing means having a receiving portion and a pair of sandwiching portions which are continuous with both ends of the receiving portion and which sandwich the plug-in unit by the elastic deformation of the receiving portion are attached to the housing. .

The receiving portion of the fixing means is elastically deformed by being pressed by the plug-in unit, and the pair of holding portions sandwich the plug-in unit. Therefore, since the plug-in unit is held by the housing, it is possible to prevent the plug-in unit from rattling in the insertion / removal direction and a surface direction perpendicular thereto regardless of the vibration of the electronic device and to drop from the fixed portion. Is prevented.

In this plug-in unit fixing mechanism, the fixing means is attached to the housing. In this embodiment, not only the fixing means and the housing are directly joined, but also the support frame is fixed. Indirect bonding through such as is also included.

[0012] The plug-in unit fixing mechanism according to the second aspect of the present invention has the structure described in the first aspect.
An elastic body for urging the receiving portion toward the plug-in unit is provided between the receiving portion of the fixing device and the housing to which the fixing device is attached.

That is, since the receiving portion is pressed toward the plug-in unit by the elastic body, the holding of the plug-in unit by the fixing means is reinforced.

According to a third aspect of the present invention, there is provided a plug-in unit fixing mechanism according to the first or second aspect, wherein the fixing means is made of metal.

Since the heat conductivity of the fixing means can be increased by using metal, the heat generated by the plug-in unit is transmitted to the housing via the fixing means. Further, by increasing the conductivity of the fixing means, the plug-in unit and the housing are electrically connected.

A plug-in unit fixing mechanism according to a fourth aspect of the present invention is the plug-in unit fixing mechanism according to any one of the first to third aspects, wherein the receiving portion has a flat shape. .

That is, the adhesion between the receiving portion and the plug-in unit is improved.

According to a fifth aspect of the present invention, there is provided a plug-in unit fixing mechanism according to any one of the first to third aspects, wherein the receiving portion protrudes toward the plug-in unit. It is characterized by being shaped.

That is, the angle at which both ends of the receiving portion move when a load is applied to the receiving portion from the plug-in unit can be increased, so that the sandwiching portion is closed more greatly.

According to a sixth aspect of the present invention, in the plug-in unit fixing mechanism according to any one of the second to fifth aspects, the elastic body is made of sponge rubber. I have.

Therefore, the elastic body can be obtained at low cost.

The plug-in unit fixing mechanism according to a seventh aspect of the present invention is the plug-in unit fixing mechanism according to any one of the first to sixth aspects, wherein the housing is formed of a box-shaped housing body and the housing. And a cover serving as a lid of the body main body, the plug-in unit is mounted on a motherboard of the housing main body, and the fixing means is provided on the cover.

Therefore, by attaching the cover to the housing main body, the fixing means comes into contact with the plug-in unit and is elastically deformed to sandwich the plug-in unit.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plug-in unit fixing mechanism according to the present invention will be specifically described based on a preferred embodiment shown in the drawings. 1 to 3 show an embodiment of a plug-in unit fixing mechanism 10 of the present invention. The plug-in unit fixing mechanism 10 is for fixing a part of a plug-in unit 14 provided in the electronic device 12 to a housing 16 of the electronic device 12. The plug-in unit fixing mechanism 10 includes a fixing means 22 having a receiving portion 18 elastically deformed by the pressing of the plug-in unit 14 and a pair of holding portions 20 for holding and holding the plug-in unit 14. It is attached and configured. The plug-in unit 14 comes into contact with and presses the receiving portion 18 in a direction perpendicular to the thickness direction, and the receiving portion 18 receives this pressing force and is elastically deformed so that both ends are close to the plug-in unit 14. Pinch
20 is formed continuously at both ends of the receiving portion 18,
The plug-in unit 14 is sandwiched between the elastic deformations 18. Further, a plurality of fixing means 22 are provided corresponding to each plug-in unit 14. Although the type of the electronic device 12 is not particularly limited, it is assumed that the electronic device 12 is used or transported in an environment that receives vibration or impact.

In this embodiment, the fixing means
Reference numeral 22 denotes a metal leaf spring having a substantially W-shape as a whole with its central portion expanded. That is, the central portion of the W-shape is expanded and flattened to form the receiving portion 18, and the holding portion 20 is formed by the two convex portions at the end portions of the W-shape.
Is configured. Further, as shown in FIG.
The width of the receiving part 18 is the package 14 of the plug-in unit 14.
a is set to be relatively wide in accordance with the width of a.
It is sized to be held down by For this reason,
The receiving portion 18 of the fixing means 22 is elastically deformed by being pressed by the plug-in unit 14, and the pair of holding portions 20 sandwich and hold the plug-in unit 14. As a result, the plug-in unit 14 is held with respect to the housing 16, so that the plug-in unit
14 is prevented from rattling in the insertion / removal direction and in a plane direction perpendicular to the insertion / removal direction, and is prevented from falling off from the fixed portion.

The housing 16 comprises a box-shaped housing main body 24 and a cover 26, and is fixed by set screws 28. A motherboard 30 is attached to the bottom surface of the housing body 24, and the plug-in unit 14 is mounted vertically on the motherboard 30. The fixing means 22 is attached to the inner surface of the cover 26 by a hooking means such as an adhesive, a double-sided tape, or a rivet.

Further, the receiving portion 18 of the fixing means 22 and the fixing means
An elastic body 32 for urging the receiving portion 18 toward the plug-in unit 14 is interposed between the cover 26 to which the 22 is attached. As the elastic body 32, for example, resin such as rubber, sponge, urethane, or the like can be used. For this reason, since the receiving portion 18 is pressed toward the plug-in unit 14 by the elastic body 32, the holding of the plug-in unit 14 by the fixing means 22 is reinforced.

The operation of the plug-in unit fixing mechanism 10 according to the embodiment of the present invention configured as described above will be described below.

As shown in FIG.
The plug-in unit 14 is mounted on the cover 26, and a fixing means
22 and the elastic body 32 are attached. Then, FIG. 1 (B)
The cover 26 is screwed to the housing body 24 as shown in FIG. As a result, the plug-in unit 14
And, the receiving portion 18 is pressed against the reaction force of the elastic body 32.

By this pressing, the receiving portion 18 is elastically deformed, and the holding portion 20 holds the plug-in unit 14. here,
When the receiving portion 18 does not receive a load from the plug-in unit 14 side, the holding portion 20 faces slightly outward, but the receiving portion 18
Since both ends are inclined inward along the outside by receiving a load, the sandwiching portion 20 sandwiches and fixes the plug-in unit 14. Also, the repulsive force of the elastic body 32 is
The holding force of the plug-in unit 14 is strengthened by supplementing the spring force of the plug 22, and the receiving portion 18 is brought into close contact with the plug-in unit 14.

As a result, the plug-in unit 14 is
Since the plug-in unit 14 is held with respect to the electronic device 12, it is possible to prevent the plug-in unit 14 from rattling in the insertion / removal direction and the surface direction irrespective of the vibration of the electronic device 12, and to prevent the plug-in unit 14 from falling off the motherboard 30.

Further, as shown by the upper arrow in FIG. 3, the heat of the heat-generating plug-in unit 14 is transmitted from the cover 26 to the housing body 24 via the fixing means 22. This heat is radiated from the outer surfaces of the cover 26 and the housing body 24. At this time, since the receiving portion 18 and the plug-in unit 14 are in close contact with each other by the elastic body 32, the heat transfer coefficient can be improved and the heat radiation can be performed effectively.

If the fixing means 22 is made of a highly conductive metal, the conductivity between the plug-in unit 14 and the housing 16 can be ensured.

As described above, according to the plug-in unit fixing mechanism 10 of the present embodiment, since the metal plate spring is used as the fixing means 22, the vibration resistance and the shock resistance can be improved, and the plug-in unit can be improved. The unit 14 can be held without play for a long time. Further, the electrical conductivity and the thermal conductivity between the plug-in unit 14 and the housing 16 can be improved. In particular, when electrical continuity between the housing 16 and the plug-in unit 14 is required for the purpose of electromagnetic shielding, or in a sealed housing 16 that requires waterproofing or the like, heat generated from the plug-in unit 14 This is effective when heat is dissipated. Further, since the plug-in unit 14 can be fixed simply by attaching the cover 26, the attaching / detaching operation of the fixing means 22 can be facilitated, and the workability can be improved.

The embodiment described here is a preferred embodiment of the present invention, and the present invention is not limited to this, and it is a matter of course that the present invention can be variously modified and implemented without departing from the gist. . For example, in the above-described embodiment, the fixing means 22 is directly attached to the cover 26. However, the present invention is not limited to this, and the fixing means 22 may be attached to a support frame or the like fixed to the housing 16. Also in this case, the fixing means 22 is pushed into the plug-in unit 14 and deformed.

Further, in the above embodiment, the fixing means 22
Is made of metal, but is not limited to this, and may be made of another material, for example, plastic. In this case, the plug-in unit 14 can be held without play for a long period of time, and the work of attaching and detaching the fixing means 22 can be facilitated to improve workability.

In the above-described embodiment, the width of the receiving portion 18 is set relatively wide according to the package 14a of the plug-in unit 14. However, the present invention is not limited to this.
When holding the board 14b of the plug-in unit 14, the width of the receiving portion is set narrow according to the thickness of the board 14b as shown in FIG. By using the fixing means 34 set as described above, the thin substrate 14b can be reliably held. Therefore, by setting the width of the receiving portion in accordance with the width of the object to be held, the holding can always be performed firmly and reliably.

Further, in the embodiment shown in FIGS. 1 to 3 described above, the elastic body 32 is provided between the receiving portion 18 and the cover 26. However, the present invention is not limited to this, and as shown in FIG. It is not necessary to provide. In this case, the plug-in unit 14 can be held only by the holding force of the fixing means 34.

In the above-described embodiment, the receiving portion 18 has a flat shape. However, the present invention is not limited to this. For example, the receiving portion 36 may have a convex shape protruding toward the plug-in unit 14 as shown in FIG. good. In this case, when a load is applied to the receiving portion 36 from the plug-in unit 14, the angle at which both ends of the receiving portion 36 move can be increased, so that the holding portion 38 can be closed more greatly, and the holding force increases. it can.
Reference numeral 40 in FIG. 5 is a through hole for screwing the fixing means 42 to the cover.

Furthermore, in the above-described embodiment, the elastic body 32 is made of sponge rubber. However, the present invention is not limited to this. The elastic body 32 may be made of ordinary resin such as rubber or urethane, or may be made of a spring such as a leaf spring or a compression coil spring. A member may be used. In any case, the fixing means 22 can be reinforced.

[0041]

As described above, according to the plug-in unit fixing mechanism according to the present invention, the receiving portion of the fixing means is elastically deformed by being pressed by the plug-in unit, so that the pair of pinching portions are plugged. Since the in-unit is sandwiched, the work of attaching and detaching the fixing means can be facilitated, and the workability of fixing the plug-in unit can be improved. Since the plug-in unit is elastically held, vibration resistance and impact resistance can be improved.

According to the plug-in unit fixing mechanism according to the second aspect of the present invention, since the receiving portion is pressed toward the plug-in unit by the elastic body, the holding of the plug-in unit by the fixing means can be reinforced. it can.

According to the plug-in unit fixing mechanism according to the third aspect of the present invention, since the fixing means is made of metal, the plug-in unit can be held without rattling for a long time. Further, the electrical conductivity and thermal conductivity between the plug-in unit and the housing can be made excellent. In particular, when electrical continuity between the housing and the plug-in unit is required for the purpose of electromagnetic shielding, or when heat generated by the plug-in unit is radiated from the housing to the outside in a sealed housing that requires waterproofing, etc. It will be suitable.

According to the plug-in unit fixing mechanism according to the fourth aspect of the present invention, since the receiving portion is formed in a flat shape, the adhesion between the receiving portion and the plug-in unit can be improved. Therefore, conductivity and heat conductivity can be improved.

According to the plug-in unit fixing mechanism according to the fifth aspect of the present invention, since the receiving portion has a convex shape protruding toward the plug-in unit, when a load is applied to the receiving portion from the plug-in unit. The angle at which both ends of the receiving portion move can be increased. For this reason, since the sandwiching portion is more greatly closed, the holding of the plug-in unit can be strengthened.

According to the plug-in unit fixing mechanism according to the sixth aspect of the present invention, since the elastic body is made of sponge rubber, the elastic body can be obtained at low cost.

According to the plug-in unit fixing mechanism of the present invention, by attaching the cover to the housing body, the fixing means abuts on the plug-in unit and is elastically deformed to sandwich the plug-in unit. Become like Therefore, the work of attaching and detaching the fixing means can be facilitated, and the workability of fixing the plug-in unit can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional side view showing a plug-in unit fixing mechanism according to the present invention, wherein (A) shows a state before a cover is attached, and (B) shows a state after the cover is attached.

FIG. 2 is a perspective view showing an embodiment of a plug-in unit fixing mechanism according to the present invention.

FIG. 3 is a vertical sectional side view showing a heat conduction path in the plug-in unit fixing mechanism according to the present invention.

FIG. 4 is a longitudinal sectional side view showing another embodiment of the plug-in unit fixing mechanism according to the present invention, wherein (A) shows a state before a cover is attached, and (B) shows a state after the cover is attached. Show.

FIG. 5 is a view showing another embodiment of the fixing means;
(A) is a perspective view, (B) is a front view.

6A and 6B are longitudinal sectional side views showing a conventional plug-in unit fixing mechanism, wherein FIG. 6A shows a state before a cover is attached, and FIG. 6B shows a state after the cover is attached.

FIG. 7 is a longitudinal sectional side view showing another example of a conventional plug-in unit fixing mechanism.

FIG. 8 is a vertical sectional side view showing a heat conduction path in a conventional plug-in unit fixing mechanism.

[Explanation of symbols]

 10 Plug-in unit fixing mechanism 12 Electronic device 14 Plug-in unit 16 Housing 18 Receiving part 20 Holding part 22 Fixing means 24 Housing body 26 Cover 30 Motherboard 32 Elastic body

Claims (7)

[Claims] 1. A plug-in unit fixing mechanism for fixing a part of a plug-in unit provided in an electronic device to a housing of the electronic device, wherein the plug-in unit abuts in a direction perpendicular to a thickness direction thereof. A receiving portion that is elastically deformed so that both ends are close to the plug-in unit by this pressing, and that is continuous with both ends of the receiving portion and that the plug-in unit is sandwiched by the elastic deformation of the receiving portion. A plug-in unit fixing mechanism, wherein fixing means having a pair of holding portions is attached to the housing. 2. An elastic body for urging the receiving part toward the plug-in unit is provided between the receiving part of the fixing means and the housing to which the fixing means is attached. The plug-in unit fixing mechanism according to claim 1. 3. The plug-in unit fixing mechanism according to claim 1, wherein said fixing means is made of metal. 4. The plug-in unit fixing mechanism according to claim 1, wherein said receiving portion has a flat shape. 5. The plug-in unit fixing mechanism according to claim 1, wherein the receiving portion has a convex shape protruding toward the plug-in unit. 6. The plug-in unit fixing mechanism according to claim 2, wherein said elastic body is made of sponge rubber. 7. The housing is formed of a box-shaped housing main body and a cover serving as a lid of the housing main body, and the plug-in unit is mounted on a motherboard of the housing main body.
The plug-in unit fixing mechanism according to any one of claims 1 to 6, wherein the fixing means is provided on the cover.