JP2001227513A - Clamp device and clamp body and radiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a clamp structure corresponding to different plural intervals by using one kind of clamp body as well as to provide a radiator for an electronic part by adpoting this clamp structure in a clamp device of a type for fastening and fixing a relatively small part in a pressing state by using an L-shaped clamp body, a spacer and an installing screw. SOLUTION: A projection 3 having an engaging stage formed in a gradually tapering stairs shape or formed in a multistage shape is arranged on a leg piece 4 in the clamp body 7 to be engaged in an optional engaging stage with a receiving hole 8 in a baseplate 1 so that the leg piece 4 is adapted to different intervals in the optional length.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD OF THE INVENTION

[0002] The present invention relates to a clamp device for fixing a relatively small component to a base plate in a pressed state, a clamp body to be mounted on the clamp device, and a heat radiating device for electronic parts employing the clamp device. .

[Prior art]

When mounting a heat-generating electronic component such as a power transistor or a diode on a printed circuit board (hereinafter referred to as a printed circuit board), it is important to prevent overheating of the electronic component itself and heating of adjacent mounted components. Above, a heat sink is provided on a printed circuit board, and electronic components are cooled via the heat sink by crimping the electronic components to the heat sink. Conventional heat dissipation devices of this type include, for example, As shown in FIGS. 6 and 7, an electronic component such as a diode or a power transistor as an object to be fixed W is fixed on a printed circuit board P by soldering at a connection terminal L thereof in an upright state. The dual-purpose base plate 1 is fixedly installed adjacent to the fixed object W, and the fixed object W is fixed by the clamp device 2 attached to the base plate 1.
Is pressed against the base plate 1.

The clamp device 2 has an L-shaped clamp body 7 comprising a leg piece 4 having a projection 3 at the tip and a plate-like arm body 6 having a female screw-like mounting hole 5 near the center. The base plate 1 is provided with a receiving hole 8 corresponding to the projection 3 of the clamp body 7 and a fool-shaped mounting hole 9 corresponding to the mounting hole 5, and as shown in FIG. Base plate 1 on one side
And an electrically insulating spacer 10 on the opposite side.
In addition to contacting the distal end of the arm 6 in the clamp body 7 with the
Is inserted into the receiving hole 8 of the base plate 1 and the position of the leg is regulated. The object W is pressed and adhered to the base plate 1 by the distal end of the arm body 6 through the spacer 10 under the tension of the arm 4, and the heat generated by the electronic component as the object W is used as the heat sink 1. To be dissipated.

[0005]

It is necessary to properly select a space C (space distance or creepage distance) for insulation between the arm body 6 and the fixed object W (electronic component) in the clamp body 7. Needless to say, since it is necessary to comply with each standard defined for each destination such as a country or a region, a spacer 10 for maintaining the interval C corresponding to these different standards is prepared. In addition, it is necessary to prepare several types of clamp bodies 7 having different lengths of the leg pieces 4, so that the production and management of the clamp bodies 7 are complicated,
It is extremely uneconomical.

SUMMARY OF THE INVENTION An object of the present invention is to provide a clamping device of the type which uses an L-shaped clamping body, a spacer and a mounting screw to tighten and fix a relatively small component in a pressed state. The object of the present invention is to provide a clamp structure corresponding to a plurality of different intervals C, despite the use of one type of clamp body without preparing It is an object of the present invention to provide a heat radiating device for electronic parts which adopts a clamping device which performs the above.

[0007]

In order to achieve the above object, according to the present invention, there is provided a stepped projection formed on a leg piece of a clamp body, the engagement step being gradually tapered. This is a clamping device which can be used with an arbitrary length by engaging the leg piece 4 with an arbitrary length by engaging the receiving hole 8 in the base plate 1 at an arbitrary engaging step.

According to a second aspect of the present invention, the clamp
The clamp device according to claim 1, wherein a plurality of receiving holes (8) respectively corresponding to a plurality of engaging steps of the projection (3) are arranged in proximity to each other. 3. The clamp device according to claim 2, wherein the attachment devices are connected to each other through elongated mounting holes that are wider than the diameter of the tightening screws.

According to a fourth aspect of the present invention, the projections 3 are formed on the leg pieces 4 of the clamp body 7 with the engagement steps formed in a hierarchical manner, and the base plate 1 has an elongated hole portion 8a which allows the projections 3 to pass therethrough.
Receiving hole 8 communicating with the narrow width portion 8b engaged with the engaging step.
The leg piece 4 can be used with an arbitrary length by engaging the narrow portion 8b of the receiving hole 8 in the base plate 1 at an arbitrary engagement step. It is a clamping device.

According to a fifth aspect of the present invention, an L is formed of a leg piece 4 having a stepped projection 3 and a plate-like arm body 6 having a mounting hole 5 near the center, the engagement step being gradually tapered. FIG. 6 is a perspective view of a clamp member used in the clamp device according to the first aspect of the present invention. An L-shaped clamp body 7 comprising a plate-like arm body 6 having a mounting hole 5 near the center thereof, which is a clamp body used in the clamp device according to claim 4.

According to a seventh aspect of the present invention, there is provided a clamp device according to any one of the first to fourth aspects, and a base plate 1 serving also as a heat radiating plate is adopted. A spacer 10 is interposed between the electronic component and the arm 6 of the clamp body 7 while the component is kept in contact with the
1. A heat dissipating device for electronic components, wherein the heat of the electronic components is dissipated by a base plate 1 also serving as a heat dissipating plate.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the illustrated embodiments.

As an object to which the present invention is applied, as shown in FIGS. 1 to 3, for example, an electronic component such as a power transistor serving as an object to be fixed W is mounted on a printed circuit board P in a standing state. In addition to fixing by soldering, the base plate 1 also serving as a heat sink is fixed adjacent to the fixed object W, and the fixed object W is pressed against the base plate 1 by the clamp device 2 attached to the fixed base plate 1. As described above, the clamp device 2 is provided with an L-shaped clamp body 7 including a leg piece 4 having a projection 3 at a tip and a plate-like arm body 6 having a female screw-shaped mounting hole 5 near the center. At the same time, a receiving hole 8 corresponding to the projection 3 of the clamp body 7 and a fool-shaped mounting hole 9 corresponding to the mounting hole 5 are formed in the base plate 1 so that one side surface of the fixed object W is mounted on the base plate. 1 and an electrically insulating spacer 10 on the opposite side. In addition to abutting the tip of the arm 6 in the clamp body 7 while keeping it in place, the protrusion 3 of the leg 4 in the clamp body 7 is inserted into the receiving hole 8 of the base plate 1 and the position is regulated. By inserting a tightening screw 11 from the back of the plate 1 and screwing its tip into the mounting hole 5, the leg 4
The fixed object W is pressed and adhered to the base plate 1 by the tip of the arm body 6 via the spacer 10 under the tension of the arm 6, and the heat generated by the electronic component as the fixed object W is generated by the base plate 1 serving also as a heat sink. Adopt a clamping device and a heat radiating device of a type that is effectively dissipated.

As a special configuration of the present invention with respect to the above-described type, in the embodiment of FIGS. 1 to 3, the leg piece 4 of the clamp body 7 is provided with a stepped projection 3 whose engagement step becomes gradually tapered. In addition, a plurality of receiving holes 8 having a hole diameter adapted to the engagement of each engagement step in the projection 3 are arranged in close proximity to the base plate 1 so that the electronic component as the object to be fixed W and the clamp body 7 are provided. Engagement of the projections 3 in a state where the arm 6 and the fixed object W are substantially parallel with each other with the spacer 10 having the proper distance C between the arms 6 interposed therebetween. The step and the receiving hole 8 corresponding to the engaging step are selectively engaged, and the object W is pressed and brought into close contact with the base plate 1 by the tightening screw 11. In some cases, the receiving hole 8 may be used as the mounting hole 9 due to the selected position.

The receiving holes 8 and the mounting holes 9 in the base plate 1 are slightly wider than the diameter of the tightening screw 11 while a plurality of circular receiving holes 8 are arranged in a row as shown in FIG. The hole-shaped mounting holes 9 may be provided in a skewered manner, or as shown in FIG. 4B, a plurality of elongated hole-shaped receiving holes 8 are arranged in parallel and the elongated hole-shaped mounting holes 9 are formed. Alternatively, as shown in FIG. 4 (c), while the plurality of elongated receiving holes 8 are lined up, the elongated mounting hole 9 slightly wider than the diameter of the tightening screw 11 is skewered. 4 (d) of FIG.
The stepped receiving hole 8 may be formed such that the long holes communicate with each other in a layered manner as described above.

In addition, as for the formation of the engaging step of the leg 4 in the clamp body 7, it is formed in a hierarchical manner as shown in FIG. A receiving hole 8 is provided in a communication state between the narrow portion 8b and the narrow portion 8b that engages with the engaging step. By engaging at any engagement stage, the leg pieces 4
Can be used under any length.

Regarding the mounting hole 5 of the arm 6 and the mounting hole 9 of the base plate 1 in the clamp body 7, the mounting hole 5 of the arm 6 is formed into a long hole, contrary to the embodiment of FIGS. In addition to this, the mounting hole 9 of the base plate 1 is formed in a screw shape (not shown),
The tightening screw 11 may be inserted and inserted from the clamp body 7 side.

As for the receiving holes 8 of the base plate 1, a plurality of receiving holes 8 having a specific size corresponding to the standard are not provided in a row.
One type of clamp body 7 can be applied to any of the receiving holes 8.

[0019]

As described above, according to the present invention, the following effects can be obtained.

The clamp body 7 is provided with a projection 3 having a plurality of engagement steps near the tip of the leg piece 4 so as to engage with the receiving hole 8 in the base plate 1 at an arbitrary engagement step. Therefore, this allows the leg piece 4 to be used with an arbitrary length. Therefore, unlike the complicated conventional technique of manufacturing and managing many types of clamp bodies 7, only one type of clamp body 7 is sufficient. Remarkably economical.

When a plurality of receiving holes 8 respectively corresponding to a plurality of engaging steps of the projections 3 of the clamp body 7 are arranged in close proximity to the base plate 1, the thickness of the fixed object W or the spacer 10 can be arbitrarily set at the same position. When a plurality of receiving holes 8 are connected to each other through a mounting hole 9 wider than the diameter of the tightening screw 11, the tightening screw 11 can be fixed at the time of mounting. This is convenient when the mounting position is changed in accordance with the change in the length of the leg pieces 4 while the leg pieces 4 are inserted through the holes 5 and 9.

The engagement steps of the projections 3 in the clamp body 7 are formed in a hierarchical manner, and the base plate 1 has a long hole portion 8a that allows the projections 3 to pass through and a narrow width portion 8b that engages with the engagement steps. When the receiving hole 8 is provided in a communicating state and is engaged with the narrow portion 8b of the receiving hole 8 in the base plate 1 at an arbitrary engaging step, the space occupied by the receiving hole 8 in the base plate 1 is reduced. can do.

Protrusions 3 having a plurality of engaging steps are provided on the clamp body 7 near the ends of the leg pieces 4 so as to engage with the receiving holes 8 in the base plate 1 at arbitrary engaging steps. While adopting the clamp device, the base plate 1 is also used as a heat sink, and the spacer 10 is placed between the electronic component and the arm body 6 of the clamp body 7 while the electronic component as the object to be fixed W is in contact with the base plate 1. Since the clamp member is interposed and tightened by the tightening screw 11, the electronic device can be electrically connected under the condition that the distance C between the electronic component and the clamp member 7 is arbitrarily selected despite the use of one kind of clamp member 7. The parts can be easily brought into close contact with the base plate 1 also serving as a heat sink.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view showing an embodiment of the clamp device of the present invention.

FIG. 2 is a front view of the apparatus of FIG.

FIG. 3 is a perspective view of only the clamp body of the apparatus of FIG. 1;

FIG. 4 is a front view showing a receiving hole in a base plate in another embodiment.

FIG. 5 is a perspective view of a main part in still another embodiment.

FIG. 6 is a partially broken side view illustrating a conventional clamping device.

7 is a perspective view of only the clamp body of the device of FIG. 6;

[Explanation of symbols]

 Reference Signs List 1 Base plate 2 Clamp device 3 Projection 4 Leg piece 5 Mounting hole 6 Arm body 7 Clamp body 8 Receiving hole 8a Long hole portion 8b Narrow width portion 9 Mounting hole 10 Spacer 11 Tightening screw W Fixed object

Claims (7)

[Claims] 1. An L-shaped clamp body (7) comprising a leg (4) having a projection (3) at the tip and a plate-like arm (6) having a mounting hole (5) near the center. At the same time, a receiving hole (8) corresponding to the projection (3) of the clamp body (7) and a mounting hole (9) corresponding to the mounting hole (5) are formed in the base plate (1). Tighten the screws (1) over holes (5) and (9).
1) A clamp device of a type for fixing an object to be fixed (W) to a base plate (1) by inserting the clamp body (7) to the base plate (1) and inserting the clamp body (7) into the clamp body (7). The leg piece (4) is provided with a stepped projection (3) in which the engagement step is gradually tapered, and is engaged with the receiving hole (8) in the base plate (1) at an arbitrary engagement step. A clamping device whereby the leg piece (4) can be used under any length. 2. A plurality of receiving holes (8) respectively corresponding to a plurality of engaging steps of a projection (3) of a clamp body (7) are arranged in close proximity to the base plate (1). Clamping device. 3. The clamping device according to claim 2, wherein the plurality of receiving holes are communicated with each other by an elongated mounting hole wider than the diameter of the tightening screw. 4. An L-shaped clamp body (7) composed of a leg (4) having a projection (3) at the tip and a plate-like arm (6) having a mounting hole (5) near the center. At the same time, a receiving hole (8) corresponding to the projection (3) of the clamp body (7) and a mounting hole (9) corresponding to the mounting hole (5) are formed in the base plate (1). Tighten the screws (1) over holes (5) and (9).
1) A clamp device of a type for fixing an object to be fixed (W) to a base plate (1) by inserting the clamp body (7) to the base plate (1) and inserting the clamp body (7) into the clamp body (7). The leg piece (4) is provided with a projection (3) in which engagement steps are formed in a hierarchical manner, and the base plate (1) is provided with an elongated hole portion (8a) allowing passage of the projection (3). Narrow part (8
b) is provided with a receiving hole (8) which is in communication with the base plate (1), and is engaged with a narrow portion (8b) of the receiving hole (8) in the base plate (1) at an arbitrary engaging step, so that the leg piece is provided. (4) A clamping device which can be used under an arbitrary length. 5. A leg piece (4) having a stepped projection (3) and a plate-like arm body (6) having a mounting hole (5) near the center, the engagement step being gradually tapered. An L-shaped clamp body (7) comprising: a clamp body used in the clamp device according to claim 1. 6. A projection (3) in which engagement steps are formed in a hierarchical manner.
An L-shaped clamp body (7) comprising a leg piece (4) having a certain portion and a plate-shaped arm body (6) having a mounting hole (5) near the center thereof, wherein the clamp device according to claim 4 is provided. Clamp body used for 7. A clamp device (2) according to any one of claims 1 to 4, and a base plate (1) serving also as a heat sink is adopted as a fixed object (W). The spacer (10) is interposed between the electronic component and the arm body (6) of the clamp body (7) while the electronic component is kept in contact with the base plate (1), and is clamped and pressed by the clamping screw (11). A heat radiating device for an electronic component, characterized in that the heat radiating device is used.