JPH0354892A - Ejector for board - Google Patents

Abstract

PURPOSE:To simplify board inserting and removing operations by connecting a ground pattern to the conductive part of a case merely by incorporating the board in the case. CONSTITUTION:A board B is inserted into a case C, a pressing plate 27 of grounding fittings 20 is brought into contact with the case C, and an ejector 1 is rotated in a direction of an arrow (a). A connecting part 5 is connected to the hole CH of the case C, and a protrusion 35 of fitting 20 is engaged with the recess 15 of an ejector 1. The plate 27 presses the side face of the case C, a contact presses a grounding pattern EP through a member 21 to be grounded. An operating unit 3 is rotated in a direction of an arrow C at the time of removing. The protrusion 35 is removed from the recess of the ejector 1, and the part 5 is removed from the hole CH. When the board B is removed, the fittings 20 is disconnected from the case C. According to this structure, the board can be simply inserted and removed, and the fluctuation of the board is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an ejector for a substrate, and more particularly to an ejector attached to a substrate housed in a storage case.

[Prior Art] Conventionally, when inserting or pulling out a board such as a printed circuit board into its storage case, a locking mechanism has been used to facilitate these operations and to ensure that the stored board is securely fixed. An ejector equipped with this type of ejector is known.General 1: One company has such an ejector.The ejector is attached to the corner of the board.

Case to store this board {Table 1: To remove noise coming from the power line on the board. Using a conductive material, it is electrically connected to the ground pattern on the board, as shown in Figure 7. That is, a screw attachment part a is provided on the conductive case C, and the earth pattern p on the board k formed in the direction of the guide rail g and the case C are electrically connected by the screw b, thereby reducing noise. -ing

[Problems to be Solved by the Invention] However, in the above configuration, when pulling out the board 1, the screw b must be loosened with a screwdriver before operating the ejector e, and conversely, Even after mounting board k, screws B had to be tightened, which was a very troublesome task.Especially when boards k were mounted in multiple tiers {To remove the middle board k} Starting with the top board k, loosen the screws b and pull out the board k11
It was not possible to loosen the screw b of the middle board k, and it required a lot of effort.Therefore, although ejector e seems to be able to be inserted and removed with one touch, it is not very useful because it involves such operations. In addition, using a metal guide rail, the ground pattern p was configured so that it was in direct contact with the metal guide rail (ヱ) Although there is no such effort, repeated attachment and detachment of the board k causes The ground pattern p is scraped by the guide rail, and the scraped metal powder may cause troubles such as short circuits in the electric circuit.The ejector for a board of the present invention solves the above problems and is formed on a board. It is an object of the present invention to facilitate insertion and removal of a board even in a configuration in which a ground pattern and a case are electrically connected.

The structure of the present invention that achieves the above object will be described below.

[Means for Solving the Problems] A substrate ejector according to the present invention {an ejector for ejecting a substrate stored in a storage case having at least a conductive portion, wherein the surface of the substrate is held between the corners of the substrate. A conductive grounding plate is inserted between the holding plate and the substrate, and the grounding plate (and the grounding plate connected to the grounding pattern formed on the substrate) is provided.
:, The gist is that a pressing member that presses a conductive portion of the storage case when the substrate is stored in the storage case is integrally formed.

[Function] The board ejector of the present invention having the above configuration (a conductive ground plate connected to the ground pattern is inserted between the holding plate supporting the upper board surface and the board. This ground plate { When the board is stored in the case, the pressing member presses the conductive part of the case.Therefore, when the board is stored, the ground pattern and the conductive part of the case are electrically connected. When the board is pulled out, the pressure of the pressing member on the conductive part of the case is released, and this electrical connection is cut off.

[Example] In order to further clarify the structure and operation of the present invention described above, preferred embodiments of the substrate ejector of the present invention will be described below.

FIG. 1 (Top) is a perspective view showing a state in which a board ejector according to an embodiment is attached to a board and the board is stored in a conductive storage case.

Board ejector 1 (hereinafter referred to as AA ejector 1) is rotatably attached to the opposite corner of the board B in the insertion direction. This board BIL Synthetic resin guide rail GIjQ provided in the conductive storage case C
By rotating the ejector 1 in the direction of arrow a, the stored tag is fixed by a locking mechanism to be described later.

The ejector 1 and the members attached around it will be explained with reference to FIG. 2.

A roughly triangular synthetic resin ejector 1 (has an operating part 3, a hook-shaped locking part 5, and a contact part 7 with a rounded tip at each vertex, and has an abutment part 7 in the center of each vertex) The support part 9 is provided with a supporting part 9.Furthermore, the board B is divided into two parts by a vertical groove 11 into which the board B is inserted.
facing each other with a spacing slightly wider than the thickness of the A circular attachment hole 13 for attaching to the board B is bored in the support part 9, and a recess 15 is formed toward the distal end of the locking part 5.

A grounding fitting 20 is inserted from the edge of the board B into the corner of the board B to which the ejector 1 is attached. The grounding fittings 20 {the mounting plates 21 facing each other, the mounting plate 23 extending from the mounting plate 21, the side plate 25 connecting the mounting plate 21 in a U-shape, and the mounting plate 25 extending from the side plate 25 Board 2
1 and a pressing plate 27 extending in a curved manner in the opposite direction.

Each of these plates is integrally formed of a metal such as phosphor bronze, which is highly conductive and does not easily form an oxide film on its surface.

An inwardly curved contact portion 29 is formed at the opposite end of the upper side plate 25, and a protrusion 31 is formed in the center thereof (as shown in FIG. 3).
is formed. The protrusion distance of this protrusion 31 is set to be smaller than half the thickness of the substrate B. On the other hand, mounting plate 2
3. A circular hole 33 having the same diameter as the mounting hole 13 of the ejector 1 is bored in the center, and a convex portion 35 with a rounded surface is formed on the side plate 25 side. There is.

Mounting hole B 1 for attaching the ejector 1 and the grounding fitting 20, and the protrusion 31 of the grounding fitting 20 on the board B
A fixing hole BH2 into which is inserted is bored. Furthermore
An earth pattern EP is printed in the insertion/extraction direction of the board B through the fixing hole B opening 2.

Ejector 1 and grounding fitting 2 configured as above]
t, attached to board B as follows. first,
Insert the board B between the opposing inserting plates 21 of the ground fittings 20, align the mounting hole B opening 1 of the board B with the circular hole 33 of the grounding fitting 20, and connect the ground to the fixing hole B opening 2 of the board B. Insert the protrusion 31 of the metal fitting 20. At this time, the two opposing contact portions of the grounding fitting 20 are brought into pressure contact with the grounding pattern EP with the substrate B sandwiched therebetween due to the action of a spring generated from the shape of the grounding fitting 20. Next, the board B with the grounding fitting 20 sandwiched therein is inserted into the groove 11 of the ejector 1, the mounting hole 13 and the mounting hole B opening 1 of the board B are arranged concentrically, and a cylindrical Fit the bottle 40. With this pin 40, the ejector 1 is rotatably pivoted around the mounting hole 13. On the other hand, the grounding fitting 20 is fixed by the protrusion 31 and the pin 40. This attached state is shown in FIG.

Next 1: The functions of the ejector 1 and the grounding fitting 20 will be explained.

Board Blt equipped with ejector 1 and grounding fitting 20
．． ．． It is housed in case C as shown in FIG. 1 above. That is, the operating section 3 of the ejector 1 is oriented in the direction in which the board B is removed, and the board B is inserted along the guide rail GI. Two rectangular holes CH are bored in the case C, on the upper entrance side, on the extension line of the guide rail G, with the board B sandwiched therebetween. In the process of inserting the board B into the case C, when the grounding metal fitting 20 enters the case C, the pressing plate 27 of the grounding metal fitting 20 comes into contact with the side edge of the case C, and slides while pressing the side surface. I will do it. Subsequently, when the contact portion 7 of the ejector 1 contacts the side edge of the case C, the ejector 1 is rotated in the direction of arrow a in order to fix the substrate B to the case C. This state is shown in FIG.

By the above rotational operation, the locking portion 5 of the ejector 1 is inserted into the rectangular hole C opening of the case C and is locked to the case C. At this time, the protrusion 35 of the grounding fitting 20 fits into the recess 15 of the ejector 1. Therefore, the direction in which the board B is removed (
Even if a force is applied in the direction of arrow b), the contact between the convex portion 35 and the concave portion 15 restricts the rotation of the ejector 1 in the direction of arrow C, and prevents the substrate B from slipping out in the direction of arrow b.

At this time, the pressing plate 27 of the grounding fitting 20 presses the side surface of the case C, and the two contact parts are connected to the grounding pattern E.
In order to press P, this earth pattern EP and case C
are electrically connected.

To extract the board B from this state, the operating section 3 of the ejector 1 is rotated in the direction of the arrow C. As a result of this rotational operation, the protrusion 35 of the grounding fitting 20 is forcibly compressed and deformed, and slides from the recess 15 of the ejector 1 into the outer label holding part 9. This state is shown in FIG. Board BI& This rotational operation causes the locking portion 5 of the ejector 1 to come off the square hole C of the case C, making it possible to pull it out in the direction of arrow d. Then, by pulling out the board B, the contact between the grounding fitting 20 and the case C is released.

Since the ejector 1 of the present embodiment described above (upper part) has a grounding fitting 20 that electrically connects the grounding pattern EP of the board B and the case C, which is inserted into the holding part 9, the board B
Electrical connection between them is possible simply by storing them in case C. Therefore, after mounting the board B, there is no need to take the trouble to make electrical connections using screws as in the conventional case, and the board B can be easily inserted and removed, which is an extremely excellent effect. In addition, since the mounting of the grounding fitting 20 (above) uses the pin 40 that pivots the ejector 1, there is no need to take the trouble to provide a special mounting member on the board B, and assembly is simplified.
Productivity is improved. In addition, the convex portion 35 of the grounding fitting 20
Since the fitting of the board B with the recess 15 of the ejector 1 acts as a locking mechanism for the board B, the board B cannot be locked without operating the ejector 1.
will not escape and will be highly reliable. Since the curved contact portion 29 presses the surface of the board B, the ground pattern E is applied regardless of the thickness of the board B.
Electrical connection with P becomes possible. In addition, the board B LL
Since the pressing plate 27 urges the case C inward from the side surface thereof, rattling is also prevented.

On the other hand, on the board B, there is no need to provide the earth pattern EP widely along the case Cl; it is sufficient to extend the earth pattern EP to a position facing the contact portion 29. There is no problem even if the board is provided with a ground pattern.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments.
The ejector 1 may be provided at both corners of the board B on the extraction side to further increase the degree of ground contact. Also,
It is also possible to adopt a configuration in which the pressing plate 27 of the grounding fitting 20 extends perpendicularly to the surface of the substrate B to effect electrical connection. Furthermore, in case C, the main body may be made of synthetic resin, and a metal plate or the like may be provided at a position where it contacts the pressing plate 27 of the grounding fitting 20 to detect grounding (without departing from the gist of the present invention). Of course, it can be implemented in various ways within the scope.

As detailed above, 1: With the board ejector of the present invention, by simply storing the board in the case, the pressing member of the ground plate connected to the ground pattern will press the conductive portion of the case. Since the ground pattern and the conductive part of the case are electrically connected by pressing, it is possible to connect the ground from the conductive part of the case, eliminating the need to make electrical connections using screws as in the past. This provides an extremely excellent effect in that the board can be easily inserted and removed. Furthermore, since the housing surface of the board is pressed by the pressing member, wobbling is prevented.

[Brief explanation of drawings]

Figure 1 is a perspective view of the board with the ejector attached when it is stored in the case. Figure 2 is an exploded perspective view of the ejector and the grounding bracket attached to the board. Figure 3 is a partial perspective view of the grounding bracket. Figure 4 is Figure 6 is a plane view explaining the operation of the ejector, and Figure 7 is a plane view explaining the prior art. 1... Board ejector 9... Support part 20...
Earthing fitting 27... Pressing plate 29... Contact part B... Board C... Case EP... Earthing pattern

Claims (1)

[Scope of Claims] 1. An ejector for extracting a substrate stored in a storage case having at least a conductive portion, comprising a clamping plate that rotates while clamping the substrate surface at a corner of the substrate; A conductive grounding plate is inserted between the board and the board, and the grounding board is connected to the grounding pattern formed on the board, and when the board is stored in the storage case. An ejector for a board, characterized in that a pressing member for pressing a conductive portion of a storage case is integrally formed.