JP4188569B2 - Ground connection device between electronic devices - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ground connection device that electrically connects mutual frame grounds between OA equipment and other electronic equipment.
[Prior art]
In OA equipment, electronic equipment, devices, and the like that are used by connecting a plurality of electronic devices, there are many cases where the plurality of electronic devices are also electrically connected to each other for power supply and signal supply to the electronic devices. In the case of such electronic devices, it is necessary to electrically connect the structural frames of the electronic devices in order to keep the frame grounds of the electronic devices at the same potential. In recent years, legal restrictions on unnecessary radiation of electromagnetic waves from electronic devices and the like have increased, and the importance of electrical connection between structural frames has increased. This electrical connection is conventionally performed by applying a leaf spring-like material called a ground plate to a structural frame or base plate of an electronic device. Conventionally, a leaf spring-shaped ground plate bent in a mountain shape is inserted into the lower surface of the base plate of an electronic device, and the ground plate is applied to the lower surface of the base plate.
[0003]
(1) and (2) in FIG. 5 show the conventional ground plate 50, which has a shape obtained by forming a metal plate into an arc shape. This ground plate 50 is used by forming a ground coupling device integrally with a metal bracket 51 as shown. The metal bracket 51 can be installed so as to be passed between base plates of electronic devices that are connected and used. The metal bracket 51 is attached to a base plate of one electronic device, and extends from the mounting piece 52. And a support piece 53 that faces the lower surface of the base plate of the other electronic device. The ground plate 50 is installed on the support piece 53 of the metal bracket 51 to fix the base end portion. It was fixed to the support piece 53 with a screw 54.
[0004]
[Problems to be solved by the invention]
In the conventional ground connection device as shown in FIG. 5, when the connection between the electronic devices is released, the ground plate 50 is caught and turned up and deformed, or the connection / release is repeated many times. As a result, the earth plate 50 is deformed and the arc-shaped peak is lowered, so that it does not correctly contact the lower surface of the base plate of the electronic device, and electrical conduction cannot be obtained well. In addition, the base plate of electronic equipment is provided so that the bent part hangs down at the edge to increase the strength, and the surface of the central plane is drawn to form an uneven (rib) surface. In many cases, however, when the ground plate 50 is inserted below the base plate, the ground plate 50 is surely applied to the uneven surface of the drawing process after passing through the bent portion formed at the edge. It is necessary to use a metal plate having higher elasticity and elasticity, and as a result, a thin plate material is used. For this reason, there is a problem that the edge of the ground plate 50 becomes sharp and the possibility of being injured increases when the hand is touched during installation work. In addition, beryllium copper, which is a thin and supple spring material, is used as a more elastic and highly elastic metal plate, and it is advantageous because it is difficult to be permanently deformed even if a large amount of deformation is given. However, it was expensive.
[0005]
The present invention has been made in view of such a problem, and the electrical connection of the frame ground between the OA device and other electronic devices can be ensured, and the ground between the electronic devices can withstand repeated connection / release. The object is to provide a coupling device.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the earth connection equipment between electronic devices of the present invention, there is provided a ground connection device between an electronic device having a base plate with a frame ground, the mutual frame ground of the electronic device In order to connect electrically, it is the earth | ground connection apparatus between electronic devices which contacts each base plate of each electronic device and electrically connects each base plate. The ground connection device between electronic devices of the present invention is configured so that the mounting piece electrically attached to the base plate of one electronic device and the lower surface of the base plate of the other electronic device extend from the mounting piece. A grounding plate made of a metal plate electrically mounted on the supporting piece and projecting upward in the longitudinal direction of the supporting piece. Have. Further, a part of the angled portion of the ground plate hits the lower surface of the base plate of the other electronic device, and the other angled portion of the ground plate is a bent portion formed to hang down at the edge of the base plate of the other electronic device. Is disposed on the support piece of the metal bracket . Therefore, an inexpensive ground plate can be used, and the ground connection between the electronic devices having the base plate as a frame ground can be reliably performed, and between durable electronic devices that can withstand repeated connection / release. A ground connection device can be provided.
[0008]
Further, the grounding plate in the longitudinal direction of the support pieces of the metal bracket, that have front and rear ends are fixed to the support piece.
[0009]
Furthermore, the grounding plate that is formed is slit along the longitudinal direction.
[0011]
Further, both side edges of the support piece of the metallic bracket, the bent portion along the side edges outside of the ground plate is that provided in a predetermined height.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
In the ground coupling device of the present invention configured as described above, the first (front end side) chevron formed on the ground plate contacts the lower surface of the base plate of the electronic device, and the second (base end side). The chevron is in contact with a bent part that is suspended from the edge of the base plate. When connecting the electronic device, when the ground plate is inserted below the base plate of the other electronic device, the first chevron passes through the bent portion of the edge of the base plate while deforming, and the second chevron When the part comes into contact with the bent part of the edge of the base plate, the first chevron that hits the lower surface of the base plate due to the pressed reaction rises and hits the lower surface of the base plate strongly. As a result, electrical conduction is more reliable. This behavior eliminates the need to use a flexible and expensive material for the ground plate as in the prior art. In addition, since at least two chevron portions are used, the number of contacts is at least doubled, and this is also a factor for ensuring electrical conduction. If the front and rear of the ground plate are fixed to the support piece of the metal bracket, it will not accidentally touch the edge of the ground plate, and safety will be improved.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. 1 is an overall perspective view of a ground connection device between electronic devices according to the present invention, FIG. 2 is a front view showing a connection state of the electronic devices, FIG. 3 is an enlarged view of a connection portion by the ground connection device in FIG. FIG. 6 is a front view showing the deformation behavior of the ground plate during the connecting operation.
[0014]
As shown in FIG. 1, the ground connection device between electronic devices of this embodiment includes a metal bracket 10 and a ground plate 11 formed with a metal plate. The metal bracket 10 is attached to a base plate 21 (see FIGS. 2 and 3) of one electronic device of the electronic devices to be connected to each other, and extends from the mounting piece 9 to the base plate 31 of the other electronic device. It has a support piece 8 having an L-shaped cross section that faces the lower surface.
[0015]
The ground plate 11 has two chevron portions 12 and 13 projecting upward at both front and rear ends. The ground plate 11 is made of a thin metal plate, has a certain degree of elasticity, and has a resilience against deformation. The ground plate 11 is fixed on the support piece 8 of the metal bracket 10 with fixing screws 15 at both front and rear ends. The material of the ground plate 11 may be a thin metal plate. However, when the electrical connection is desired to be made more reliable or the corrosion resistance is desired to be improved, the surface may be plated. As the plating, Au, Ni, Sn and the like can be considered. However, in applications where frequent insertion / extraction (connection / disconnection of electronic equipment) is performed, plating may be worn or peeled off. In such applications, it is better to avoid plating.
[0016]
In this example, a phosphor bronze plate having a thickness of 0.2 mm was used. A plurality of slits 14 are formed in the ground plate 11 along the front-rear direction to increase flexibility, so that the number of connection points can be further increased by the installation of the slits 14 so as to contribute to more reliable electrical connection. It is.
[0017]
Bending portions 17 are provided on both side edges of the support piece 8 of the metal bracket 10 that supports the ground plate 11 so as to rise along the outer sides of the both side edges of the ground plate 11. When the ground plate 11 is inserted under the electronic device, the bent portion 17 restricts the deformation height of the mountain-shaped portions 12 and 13 of the ground plate 11 to prevent excessive deformation. In addition, it is possible to prevent the ground plate 11 made of a thin metal plate from being injured by making it difficult to touch the side edge that is the cut end surface of the ground plate 11 with a hand.
[0018]
FIG. 2 shows a state in which the ground connection device between the electronic devices of the present embodiment is attached between the electronic devices 20 and 30 that are used by being connected, and the electronic devices 20 and 30 are electrically connected to each other. Here, a connection between a copying machine and a post-processing machine is shown as an example. Hereinafter, the electronic device 20 will be described as the post-processing device 20, and the electronic device 30 will be described as the copying machine 30.
[0019]
FIG. 3 is an enlarged view of a connecting portion by the ground connecting device between the electronic devices in FIG. An attachment piece 9 of the metal bracket 10 provided with the ground plate 11 is fixed to the base plate 21 of the post-processing machine 20 with a fixing screw 16. In this state, the post-processing machine 20 is connected to the copying machine 30, and the support piece 8 of the metal bracket 10 is opposed to the lower surface of the base plate 31 of the copying machine 30. The two chevron portions 12 and 13 of the ground plate 11 are in contact with the narrowed portion 34 at the center portion of the base plate 31 of the copying machine 30 and the bent portion 32 formed to hang from the edge of the base plate 31.
[0020]
(1) to (5) in FIG. 4 show the deformation behavior of the ground plate 11 when the post-processing machine 20 and the copying machine 30 are connected as described above. Hereinafter, the deformation behavior of the ground plate 11 in the continuous views (1) to (5) in FIG. Note that both the post-processing machine 20 and the copying machine 30 have casters 40 in the base portion of the apparatus, so that the floor surface can be easily moved. In addition, it is assumed that the post-processing machine 20 and the copying machine 30 are connected to each other, and the height dimensions of the base plates 21 and 31 are made to match.
[0021]
FIG. 4A shows that the post-processing machine 20 and the copying machine 30 approach each other, and the first chevron 12 on the ground plate 11 (the front end side) hits the bent portion 32 of the base plate 31 of the copying machine 30. .
[0022]
In FIG. 4B, the post-processing machine 20 and the copying machine 30 are further brought closer, and the first chevron 12 of the ground plate 11 is pushed by the bent portion 32 of the base plate 31 of the copying machine 30 to be deformed. In this way, the copier 30 is also pulled into the lower surface side of the base plate 31. The ground plate 11 is bent so as to be deformed as a whole, and since only the first chevron 12 is not crushed, it is difficult to be permanently deformed.
[0023]
FIG. 4 (3) is where the first chevron 12 of the ground plate 11 exceeds the bent portion 32 of the base plate 31 of the copying machine 30 and is once released from deformation.
[0024]
In FIG. 4 (4), the post-processing machine 20 and the copying machine 30 are closer to each other, and the second chevron 13 of the ground plate 11 (base end side) forms the bent portion 32 of the base plate 31 of the copying machine 30. It ’s over.
[0025]
Lastly, FIG. 4 (5) shows that the post-processing machine 20 and the copying machine 30 are closer together, and the second chevron 13 of the ground plate 11 exceeds the bent portion 32 of the base plate 31 of the copying machine 30. The connection is complete. At this time, the first chevron 12 of the ground plate 11 contacts the throttle part 34 at the center of the base plate 31 of the copying machine 30, and the deformation of the second chevron 13 of the ground plate 11 When the earth plate 11 is pushed in the direction of the arrow in the figure, a force is applied in the direction in which the first chevron 12 is pushed upward, and it strongly contacts the throttle portion 34 of the base plate 31 of the copying machine 30. This behavior ensures more reliable electrical continuity without using a flexible and expensive material as in the prior art. In addition, since the two chevron portions are provided at the front and rear, the number of contacts with the base plate 31 of the copying machine 30 is doubled, which is also a factor for ensuring electrical conduction.
[0026]
【The invention's effect】
As described above, the ground connection device between electronic devices of the present invention is a ground connection device between electronic devices having a base plate serving as a frame ground, and electrically connects the frame grounds of the electronic devices. In order to achieve this, it is a ground connection device between electronic devices that contacts each base plate of each electronic device and electrically connects each base plate. The ground connection device between electronic devices of the present invention is configured so that the mounting piece electrically attached to the base plate of one electronic device and the lower surface of the base plate of the other electronic device extend from the mounting piece. A grounding plate made of a metal plate electrically mounted on the supporting piece and projecting upward in the longitudinal direction of the supporting piece. Have. Further, a part of the angled portion of the ground plate hits the lower surface of the base plate of the other electronic device, and the other angled portion of the ground plate is a bent portion formed to hang down at the edge of the base plate of the other electronic device. Is disposed on the support piece of the metal bracket. Therefore, an inexpensive ground plate can be used, and the ground connection between the electronic devices having the base plate as a frame ground can be reliably performed, and between durable electronic devices that can withstand repeated connection / release. A ground connection device can be provided.
[0027]
The ground plate has both front and rear ends fixed to the support piece in the longitudinal direction of the support piece of the metal bracket. Therefore, the deformation of the ground plate can be limited by fixing the front and rear ends, and the durability of insertion / extraction is improved. It can also contribute to safety.
[0028]
Further, the ground plate is formed with slits along the front-rear direction. Therefore, each of the chevron portions separated by the slits behaves uniquely, so that it is possible to further increase the electrical contact portions between the ground plate and the base plate.
[0030]
Moreover, the bending part which follows the both-sides edge of a ground plate with the predetermined | prescribed height is provided in the both-sides edge of the support piece of a metal bracket. Therefore, excessive deformation of the ground plate can be limited by the bent portion, and the durability of insertion / extraction is improved. It also contributes to safety.
[0031]
The ground plate in the present invention can ensure reliable electrical contact even with an inexpensive material with low elastic modulus, and can obtain high connection performance at low cost. Great effect to suppress. In addition, durability during repeated insertion / extraction is high, and safety during handling is also taken into consideration, which can greatly contribute to improvement of the performance and function of the device.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a ground connection device between electronic devices according to an embodiment of the present invention.
FIG. 2 is a front view showing a state where electronic devices are connected to each other.
FIG. 3 is an enlarged front view of a connecting portion by the earth connecting device of the embodiment.
FIG. 4 is a front view showing the deformation behavior of the ground plate when the electronic device is connected, (1) is a view when the electronic devices are close together for connection, (2) is a view when the electronic devices are further approached, 3) is a diagram when the first chevron of the ground plate exceeds the bent portion of the base plate, (4) is a diagram when the second chevron of the ground plate exceeds the bent portion of the base plate, (5) is a diagram when the connection between electronic devices is completed.
5A and 5B are diagrams showing a conventional example, in which FIG. 5A is a plan view and FIG. 5B is a front view.
[Explanation of symbols]
8; support piece, 9; mounting piece, 10; metal bracket, 11; ground plate,
12; chevron, 13; chevron, 14; slit, 15; fixing screw,
17; bending part, 20; electronic equipment (post-processing machine), 21; base plate,
22; bent portion, 30; electronic device (copier), 31; base plate,
32; bent portion, 34; throttle portion, 40; caster.

Claims (4)

A ground connection device between electronic devices having a base plate serving as a frame ground, and in order to electrically connect the frame grounds of the electronic devices to each other, each base plate is brought into contact with each base plate of each electronic device. In the ground connection device between electronic devices that electrically connect each other ,
A metal bracket having a mounting piece electrically attached to the base plate of one electronic device, and a support piece extending from the mounting piece and facing the lower surface of the base plate of the other electronic device;
A ground plate made of a metal plate electrically mounted on the support piece has at least two chevron portions projecting upward in the longitudinal direction of the support piece, and a part of the chevron portions is the other chevron portion. The other chevron is disposed on the support piece of the metal bracket so that it hits the lower surface of the base plate of the electronic device and hits the bent portion that is suspended from the edge of the base plate of the other electronic device. A ground connection device between electronic devices. 2. The ground connection device between electronic devices according to claim 1, wherein both ends of the ground plate are fixed to the support piece in a longitudinal direction of the support piece of the metal bracket . The ground connection device between electronic devices according to claim 1, wherein the ground plate has a slit formed along the front-rear direction. Between the electronic devices of any one of Claims 1-3 in which the bending part which follows the both-sides edge of the said ground plate is provided in the both-sides edge of the said support piece of the said metal bracket with predetermined height . Earth coupling device.

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