JPH07142883A - Electronic device - Google Patents

Abstract

PURPOSE:To reliably mount or dismount a board in a frame and also discharge static electricity on a board outside the frame. CONSTITUTION:A board removing member 20 for removal is provided on a board 19, so that the board 19 is received by a frame 8 formed of a board holding member 1 for holding the board 19 and a side plate 7. Then it is fitted into the board removing member 20 so that a board fixing member 10 which has a plurality of cuts 14 having a protrusion 17 at the tip, whose cross section has a U-shaped and which can be removed from the board holding member 1 is provided on the frame 8 for holding the board 19. At the same time, an electric path is formed of a conductive grounding member made to protrude on the board 19, the board fixing member 10 and a protruding piece 15 for discharging static electricity on the board 19 outside by conduction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device having a printed circuit board on which a large number of replaceable electronic parts are mounted.

[0002]

2. Description of the Related Art In an electronic device equipped with a substrate such as a printed board on which a large number of replaceable electronic components are mounted, a substrate is used in order to guarantee the reliability of the device itself against vibration and the like even after the device is installed. Need to be fixed in some way.
In addition, a board accommodated in the apparatus may be newly added for maintenance / inspection or function addition, and it is desired that this addition can be easily performed.

A conventional electronic device as described above will be described below with reference to the drawings.

In FIG. 10, 31 is a substrate holding member, 3
2 is a U-shaped front wall portion formed in the front direction of the substrate holding member 31, 33 is a side wall portion formed on the left and right side edges of the substrate holding member 31, and 34 is a front wall portion 32 and a side surface of the substrate holding member 31. A flat portion surrounded by the wall portion 33, 35 is a substrate guide portion provided on the substrate holding member 31, 36 is a side plate, and 37 is a conventional frame composed of a pair of substrate holding members 31 and a pair of side plates 36. Body, 38 is a plate-like substrate fixing member whose both ends are bent, 3
Reference numeral 9 denotes a left and right bent portion of the plate-like substrate fixing member 38, 40 denotes a ground terminal provided on the side plate 36, 41 denotes a substrate, and 42
Is a connector provided on the substrate 41, 43 is a ground member provided on the substrate 41 with the screw 9, and 44 is a ground wire for connecting the ground member 43 and the ground terminal 40 to remove static electricity of the substrate 41.

As shown in FIG. 11, the earth member 43 has a screw 9 on the surface bent in a U shape. Reference numeral 45 is a protrusion provided at the tip of the ground member 43, 46 is a pair of fixing holes provided in the lower portion of the substrate 41, 47 is provided on the substrate 41, and an electric path connected to the periphery of the fixing hole 46 and the connector 42. It is a pattern.

In FIG. 12, the front wall portion 32 is bent three times as shown in the figure, and it is referred to as first, second, and third portions respectively for the sake of explanation, and the numbers are 48, 49, and 50.

In FIG. 13, the tip end portion 29 of the board insertion / removal member 20 is inserted until it comes into contact with the first portion 48.

In FIG. 14, the board 41 is inserted until the circular arc portion 30 of the board insertion / removal member 20 contacts the first portion 48.

In FIG. 15, the board insertion / removal member 20 is inserted until the tip portion 29 comes into contact with the third portion 50.

In FIG. 16, the board 41 pushes the board insertion / removal member 20 until it reaches the insertion completion position.

In FIG. 17, reference numeral 51 is a screw hole provided in the bent portion of the side plate 36, and 52 is a plate-like substrate fixing member 38.
These are fixing holes for screws provided on the left and right bent parts 39. As shown in the figure, the plate-shaped substrate fixing member 3 is fixed with screws 9.
8 is held on the side plate 36 while pushing the end surface of the substrate 41.

[0012]

However, this conventional example has the following three problems to be solved. First, when inserting / removing the substrate 41, the front wall portion 32 provided in a U-shape on the front surface of the substrate holding member 31 needs to be bent three times as shown in FIG. 12 or be a separate component (not shown). However, due to the processing error of each bent portion, the originally required squareness of each portion may not be maintained, and the front wall portion 32 may be caught on the end surface of the substrate holding member 31, and the substrate 41 may not be smoothly inserted and removed. is there.

Next, as a method of holding the substrate 41 housed in the frame 37, as shown in FIG. 17, the front end portion of the substrate 41 already housed in the frame is fixed by the conventional plate-shaped substrate fixing member 38. When the both ends of the plate-shaped board fixing member 38 are fixed to the frame 37 with the screws 9, the front surface of the board is covered with the plate-shaped board fixing member 38, so that the board is mounted on the front surface of the operation board 41. There is a limitation on the mounting of parts such as the connector 42 and switches.

Further, it is necessary to wire the ground wire 44 from the ground terminal provided on the board 41 to the board fixing member 38 on the board and fix it with screws. Depending on the board 41, there is a board that does not need to be grounded (there are no connectors on the front surface of the board and an operator hardly touches it). However, even when one board 41 is taken out from the frame, the ground member 43 is not provided. Screw 9
Since it is necessary to remove the ground wire 44 wound around, it is troublesome.

An object of the present invention is to provide an electronic device which can solve the above-mentioned conventional problems.

[0016]

In order to solve the above-mentioned problems, the present invention has a board on which an electronic component having a board insertion / removal member is mounted, and a plurality of board guide portions serving as guides for inserting / removing the board. And a front wall portion formed at a front edge adjacent to a flat portion having a substrate extraction portion formed in a part of the front direction, and a side wall portion formed at left and right side edges adjacent to the flat portion. The front wall portion has a U-shaped cross-section substrate fixing member that is formed by a pair of substrate holding members and a pair of side plates, and that has a plurality of cutout portions that fit into the substrate insertion / removal member and have protrusions at the tips. The electronic device has a frame body detachably attached to the electronic device. In order to prevent static electricity generated on the board, a conductive earth member protruding from the board and an electric path are formed from the earth member by the board fixing member and the projecting piece. In this configuration, the frame body is provided with an earth terminal for conducting and discharging the outside.

[0017]

In the above structure, when the board is inserted or removed, the shape of the board insertion / extraction member provided on the front surface of the board holding member is changed,
Since it is a two-time distributed type with one-time bending, it is easy to control the bending accuracy, and it is possible to prevent catching when the board is inserted and removed.
In addition, it is possible to maintain a stable holding force even when trying to jump out to the front because the end surface of the board insertion / removal member provided at the bottom of the board is pressed by the end surface of the cutout portion of the board fixing member. There are also few restrictions on component mounting. Moreover, when the substrate is inserted into the frame body along the guide portion on the substrate holding member, the upper end surface of the earth member protruding from the end portion of the substrate is pressed against the protruding piece of the substrate fixing member to cause vibration applied to the frame body. Due to such influences, the holding and the electric path formation for the vertical movement / disengagement of the substrate are simultaneously performed. Therefore, it is possible to surely conduct the static electricity generated by the worker's body to the outside of the frame body without removing the ground wire each time, and to prevent the influence on the substrate.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In FIG. 1, 1 is a substrate holding member, 2a and 2b
Is a front wall portion and a rear wall portion formed by bending the front and rear edges of the substrate holding member 1, 3 is a side wall portion formed by bending the left and right side surfaces of the substrate holding member 1, and 4 is a front portion of the substrate holding member 1. A flat portion 5 surrounded by the wall portion 2a, the rear wall portion 2b and the side wall portion 3 is a substrate guide portion provided on the substrate holding member 1,
Reference numeral 6 denotes a substrate take-out portion formed by cutting and bending a part of the flat portion 4, 7 is a side plate, 8 is a frame body composed of a pair of substrate holding members 1 and a pair of side plates 7, 9 is a screw, and 10 is a A board fixing member bent into a U-shaped cross section, and 11 a board fixing member 1
0 is an upper bent portion, 12 is a lower bent portion of the substrate fixing member 10, and 13 is an upper bent portion 1 of the substrate fixing member 10.
1 and a flat portion adjacent to the lower bent portion 12, 14 is a cutout portion provided in the upper bent portion 11 of the substrate fixing member 10, 15 is a protruding piece provided in the upper bent portion 11 of the substrate fixing member 10, 16 Is a fixed portion provided at two locations on the flat portion 13 and is placed on the flat portion 4 of the substrate holding member 1. Reference numeral 17 is a protrusion provided in the notch portion 14, and 18 is a ground terminal provided on the side plate 7 for conducting static electricity to the outside. Reference numeral 19 is a board, 20 is a board insertion / removal member provided below the board 19, and 21 is a connector provided on the board 19.

2 to 7, 22 is a pair of board fixing holes provided in the lower part of the board 19, 23 is a board fixing hole provided on the board 19, and a circuit pattern connected from the periphery of the board fixing hole 22 to the connector 21. , 24 is a U-shaped grounding member made of a conductive material, and 25 is a U-shaped grounding member 24.
It is bent into a letter shape and is inserted into the board fixing hole 22 by a grounding member protrusion provided at its tip and held by soldering. Two
Reference numeral 6 is a bent portion that is bent and provided below the ground member 24, 27 is a hole provided in the board insertion / removal member 20, and 28 is a rotary shaft that is inserted into the hole 27 and serves as a rotation center.

In FIG. 4, the arcuate tip 29 of the board insertion / removal member 20 is inserted until it comes into contact with the board take-out portion 6. In FIG. 5, reference numeral 30 denotes an arc portion of the board insertion / removal member 20, and the board insertion / removal member 20 is rotated until the arc portion 30 contacts the board extraction portion 6.

In FIG. 6, the front end portion 29 is the front wall portion 2a.
The board insertion / removal member 20 is rotated until it comes into contact with.

Subsequently, as shown in FIG. 7, the board insertion / removal member 20 is rotated to the insertion completion position of the board 19. Board 19
Are already held on the substrate guide portion 5 in the frame body 8. At that time, the bent portion 26 of the ground member 24 comes into contact with the flat portion 4 of the substrate holding member 1. Thereafter, the board fixing member 10 is held on the front surface of the lower board holding member 1, but the board fixing member 10 is attached to the end face of the board inserting / removing member 20.
The notch 14 is fitted and the projection 17 pushes the end face of the board insertion / removal member 20.

Further, the projecting piece 15 presses the upper end surface of the earth member 24 to hold the substrate 19 and form an electric path at the same time. Further, regarding the fixing of the substrate fixing member 10 and the substrate holding member 1, the front wall portion 2a is sandwiched between the fixing portion 16 and the lower bent portion 12 and simply fixed. afterwards,
It is fixed on the front wall portion 2a with a screw 9.

[0024]

As described above, according to the present invention,
Since the processing accuracy of the bent portion of the substrate fixing member, which is provided by bending the substrate holding member in a U-shaped cross section, is ensured, the substrate is inserted / removed without the substrate insertion / removal member attached to the lower portion of the substrate being caught by the frame body. It becomes possible.

Next, for holding the substrate accommodated in the frame,
The board insertion / removal member provided at the bottom of the board is used to prevent the board from protruding in the front direction because the board is held by the board fixing member, and the upper end surface of the grounding member provided at the bottom of the board is fixed to the board fixing member. Since it is pressed by the protruding piece, it is possible to prevent the board from moving and coming off in the upper direction.

Further, the electric path can be formed at the same time, and the static electricity generated on the substrate can be conducted to the outside from the ground terminal on the frame.

[Brief description of drawings]

FIG. 1 is a perspective view of an electronic device according to an exemplary embodiment of the present invention.

FIG. 2 is an enlarged perspective view of an essential part showing a state in which the ground member is attached to a substrate.

FIG. 3 is an enlarged sectional view of an essential part showing an insertion state of the board.

FIG. 4 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 5 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 6 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 7 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 8 is a perspective view showing a state in which the board fixing member is attached.

FIG. 9 is an enlarged sectional view of an essential part showing a state where the substrate is held by the substrate fixing member.

FIG. 10 is a perspective view of a conventional electronic device.

FIG. 11 is an enlarged exploded perspective view of the ground member.

FIG. 12 is an enlarged sectional view of an essential part showing the insertion state of the board.

FIG. 13 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 14 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 15 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 16 is an enlarged sectional view of an essential part showing another insertion state of the board.

FIG. 17 is an exploded perspective view showing a configuration in which the board is held by a conventional board fixing member.

[Explanation of symbols]

 1,31 Substrate holding member 2a Front wall part 3,33 Side wall part 4,34 Flat part 5,35 Substrate guide part 6 Substrate extraction part 7,36 Side plate 8,37 Frame 9 Screw 10 Substrate fixing member 11 Upper bent part 12 Lower Bent Part 14 Notch Part 15 Protrusion Piece 16 Fixing Part 17 Protrusion 18 Ground Terminal 19 Board 20 Board Insertion / Extraction Member 21 Connector 38 Plate Board Fixing Member

─────────────────────────────────────────────────── ───Continued from the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display H01R 9/09 Z 6901-5E

Claims (2)

[Claims] 1. A substrate on which an electronic component or the like having a substrate insertion / removal member is mounted, and a plurality of substrate guide portions that serve as guides when the substrate is inserted / removed, and a plurality of substrates are formed in a part in the front direction. Formed by a pair of substrate holding members having a front wall portion formed at the front edge adjacent to the flat portion having the extraction portion, side wall portions formed at the left and right side edges adjacent to the flat portion, and a pair of side plates And an electronic device having a frame body configured by detachably attaching a substrate fixing member having a U-shaped cross section, which has a plurality of notches having a protrusion at the tip and which is fitted to the substrate inserting / removing member, to the front wall portion. . 2. A grounding terminal, which is formed of a conductive grounding member protrudingly provided on a board, and a board fixing member and a projecting piece formed from the grounding member to electrically discharge the static electricity generated on the board to the outside. The electronic device according to claim 1, wherein the frame body is provided with.