JPH079430Y2 - Auxiliary device for inserting and removing printed wiring boards in electronic devices - Google Patents

Description

[Detailed Description of the Invention] <Industrial field of application> In an electronic device in which a mother board is mounted on the inner back portion and a plurality of printed wiring boards connected to the mother board are detachably mounted, a printed wiring board is provided. Insert,
The present invention relates to an insertion / extraction assisting device for enabling easy extraction.

<Problems to be Solved by Conventional Techniques and Inventions> Conventionally, electronic devices such as graphics display devices have been strongly demanded to have multi-functionality and high-speed processing, and in order to satisfy these demands, printing is required. It has become common to reduce the number of printed wiring boards by shortening the signal lines by enlarging the wiring boards themselves. Further, it is becoming common to further shorten the signal lines and reduce the size of the entire device by connecting the plurality of large-sized printed wiring boards to each other via a mother board.

As a schematic configuration of such an electronic device, for example, a mother substrate is attached at a predetermined lower position of a rectangular tubular casing, and a plurality of pairs of guide members are attached to inner surfaces of the casing that face each other. A structure is adopted that guides the insertion and extraction of the printed wiring board. There are cases where a connector panel is mounted on each printed wiring board and cases where one cover member is mounted as a whole. Then, in this case, if the printed wiring board becomes larger, not only the connector for making electrical connection with the mother board becomes larger, but also the number of connectors increases.
A large amount of force is required when inserting or removing the printed wiring board, and it becomes extremely difficult for an operator to hold the end of the printed wiring board and perform insertion or extraction work.

In consideration of these points, a method of disassembling a part of the casing of the electronic device to insert and remove the printed wiring board, and a method of inserting and removing the printed wiring board without disassembling the casing Although a method has been proposed, the former method has poor maintainability of the printed wiring board,
In addition, the latter method is becoming popular because it has the disadvantage of increasing the cost of the entire electronic device.

The latter method uses an ejector that is detachably attached to the printed wiring board, inserts it by the lever action of the ejector, and obtains sufficient force for extraction (see Japanese Utility Model Laid-Open No. 1-78085), and each print. Attach the ejector to the wiring board in advance,
It is roughly divided into the methods of inserting the ejector lever to obtain sufficient force for extraction.

And no matter which method is adopted, a sufficient force can be obtained by the lever action, so
The removal can be achieved easily and surely, and the occurrence of electrical connection failure can be surely prevented.

However, when adopting the method of (1), the ejector is necessary only when performing the insertion / removal work, and since the frequency of use of the ejector is extremely low, it is highly likely that it will be lost, and it must be prepared in advance as a replacement part. There is the inconvenience of having to stay. Although it may be possible to attach the electronic device to the electronic device in order to eliminate such an inconvenience, a new inconvenience arises in that not only a special accommodation space is required but also an accommodation mechanism is required. Further, when the ejector is mounted on the printed wiring board, the directionality becomes a problem, so extra care must be taken and the operability is reduced. Further, in the insertion / extraction auxiliary device shown in Japanese Utility Model Laid-Open No. 1-78085, since the connector panel is not attached to the printed wiring board,
The ejector attachment / detachment operability and directionality do not matter so much, but as shown in FIG. 7 (A), an electronic device in which a connector panel (86) is integrally attached to a printed wiring board (84). The ejector (87) applied to must have the ejector (87) turned in the opposite direction at the time of extraction shown in FIG. 7 (B) and at the time of insertion shown in FIG. 7 (C). Operability is greatly reduced. If the configuration disclosed in Japanese Utility Model Publication No. 1-78085 is adopted, the ejector (8
Dust may enter the inside of the electronic device through the fairly large opening of the connector panel (86) with the 7) removed.

When the method of (1) is adopted, the inconvenience of the method of (1) does not occur, but because the ejector is rotatably mounted, the ejector rattles when the printed wiring board is inserted. Not only is there an inconvenience that a sound is generated, but there is also an inconvenience that the printed wiring board cannot be inserted smoothly by being caught or hit by a structural member constituting the electronic device depending on the direction of the ejector.
Further, as shown in FIGS. 8A and 8B, an ejector base (88) that rotatably supports the ejector (87).
Is attached to the connector panel (86), and this connector panel (86) is connected to the printed wiring board (84). Therefore, a large force is generated when the printed wiring board (84) is inserted and removed.・ Acts on the panel (86). As a result,
If the strength of the connector panel (86) is insufficient, the connector panel (86) will be deformed, and eventually the mother board (8)
There is a high possibility that the connector (85) of 2) and the connector (85) of the printed wiring board (84) will not be sufficiently fitted to each other, resulting in poor electrical contact. And the connector panel (8
Since 6) is generally resin molded and its physical strength is not so high, there is a restriction that it can only be applied to the insertion and removal of relatively small printed wiring boards. In addition, in order to make up for the lack of strength, the ejector (87) itself has to be made large, which causes a disadvantage that a large mounting space is required and the like, which reduces versatility. Furthermore, it is necessary to improve the accuracy of the ejector (87) and the ejector base (88), and the ejector base (88) and the printed wiring board (84).

<Purpose of Invention> This invention was made in view of the above problems,
An object of the present invention is to provide an insertion / extraction auxiliary device that can be applied to insertion / extraction of a printed wiring board having a connector panel mounted thereon, can achieve reliable electrical connection to a mother board, and has good operability.

<Means for Solving the Problems> In order to achieve the above-mentioned object, a printed wiring board insertion / extraction assist device of the present invention has a connector panel on each extraction side of each printed wiring board. In addition to having a shaft member that also functions as a connecting shaft between the printed wiring board and the connector panel at a predetermined position on the extraction side end,
The ejector is rotatably attached to the shaft member, and further has a rotation restricting member that restricts the free rotation of the ejector between the shaft member and the ejector. A rotation restricting portion that restricts the rotation of the ejector is provided at a predetermined position.

However, the rotation restricting member may be a washer curved so as to bulge in one direction, and may be a coil spring having one end fixed to the shaft member and the other end engaged with the ejector. May be.

Further, it is preferable that the ejector is rotatably attached to the shaft member via the spacer.

<Operation> With the insertion / removal assisting device having the above-described configuration, if the ejector is engaged with the rotation restricting portion by rotating the ejector, a force for inserting / removing the shaft member is generated as a reaction to restrict the rotation of the ejector. The printed wiring board can be easily inserted and removed. Since the shaft member also serves as the connecting shaft between the printed wiring board and the connector panel, the force for insertion / removal directly acts on the printed wiring board, and there is no need to increase the physical strength of the connector panel. . Further, since the ejector is held by the rotation restricting member as it is at the time of extraction, there is an inconvenience that the ejector hits a structural member or the like constituting the electronic device at the time of inserting and the inserting operation is hindered. It can be solved and operability can be improved.

When the rotation restricting member is a washer that is curved so as to bulge in one direction, the ejector can be temporarily fixed at the same position when the operating force no longer acts on the ejector. When the rotation restricting member is a coil spring having one end fixed to the shaft member and the other end engaged with the ejector, the ejector is urged when the external force does not act on the ejector. Can be temporarily fixed at the limit position.

Further, when the ejector is rotatably attached to the shaft member through the spacer, the ejector can be rotated smoothly, and the ejector can be rotated regardless of the rotation restricting force of the rotation restricting member. The force required for operation can be reduced.

<Examples> Hereinafter, detailed description will be given with reference to the accompanying drawings illustrating examples.

FIG. 6 is a partially cutaway perspective view showing an electronic device incorporating a printed wiring board insertion / extraction assisting device, in which a mother substrate (2) is attached to the inner rear part of a rectangular tubular casing (1), A plurality of pairs of guide rails (3) are mounted on mutually opposing surfaces of a chassis (1a) integrally provided with a casing (1), and printed wiring is guided by the guide rails (3). The plate (4) is inserted and removed. Further, a connector panel (5) is provided on the extraction side edge of the printed wiring board (4), and a part of the connector panel (5) protrudes through the connector panel (5).
A pair of ejectors (6) is provided. In addition, (7a) is a connector mounted on the mother board (2), and (7b) is a connector mounted on the printed wiring board (4). By mating both connectors (7a) and (7b) Electrical connection between the substrate (2) and the printed wiring board (4) can be achieved. Further, (8) is an opening formed near the end of the guide rail (3) of the chassis (1a) and constitutes a rotation restricting portion for restricting the rotation of the ejector (6). .

FIG. 1 is an exploded vertical sectional view showing the relationship between the printed wiring board (4), the connector panel (5), and the ejector (6). The printed wiring board (4) is provided on the back surface of the connector panel (5). ) Is integrally provided, and a screw shaft (9) as a shaft member is screwed with the connecting plate (5a) through a hole (4a) formed in the printed wiring board (4). By doing so, the printed wiring board (4) and the connector panel (5) are integrated. In addition, the screw shaft (9),
Ejector spacer (9e), pair of flat washers (9a)
(9b), the bending washer (9c) and the ejector spacer (9d) that are curved so that the central portion bulges toward the side of the flat washer (9b), and the flat washer (9a) is inserted in this order. (9b) and bending washer (9c) are fitted to the ejector spacer (9d). The ejector (6) is fitted into the ejector spacer (9d) between the flat washers (9a) and (9b). The operation portion (6a) of the ejector (6) projects to the outside through the opening (5b) of the connector panel (5). Further, the flat washers (9a) (9b) are the ejectors (6).
It is preferably molded of polycarbonate or the like so that the frictional resistance between and is small.

As shown in FIG. 2, the ejector (6) has a tip portion (6b) extending in a direction substantially perpendicular to the operation portion (6a) with reference to holes inserted in the ejector spacers (9d) (9e).
have.

The operation of the insertion / extraction assist device having the above-described configuration is as follows.

When removing the printed wiring board (4), remove the tip (6
The ejector may be rotated so that b) engages with the guide rail (3) (see arrow A1 in FIG. 3 (A)). In this case, the tip end portion (6b) of the ejector (6) is engaged with the guide rail (3) and free rotation is restricted, but the turning force is continuously applied to the ejector (6). Therefore, as a reaction force, a force in the direction of extracting the printed wiring board (4) from the screw shaft (9) (Fig. 3 (A)).
The middle arrow C1) acts. Since this reaction force is amplified by the lever action, the connectors (7a) (7b)
The fitting can be easily removed. After that, the printed wiring board (4) may be pulled out by holding the connector panel (5), and the ejector (6) is rotated until it is disengaged from the edge of the opening (8), After that, the free rotation is restricted by the elastic force of the bending washer (9c),
As shown in FIG. 3 (B), the state is maintained as it is.

When the printed wiring board (4) is inserted, the ejector (6) is regulated so that the ejector (6) is left as it is. Therefore, the printed wiring board (4) is not hindered by the ejector (6). ) Can be smoothly engaged with the guide rail (3) and pushed in as it is. Then, at the end of pushing, the tip portion (6b) of the ejector (6)
Engage with the tip of the guide rail (3), the ejector (6) rotates in the opposite direction (see arrow A2 in Fig. 3 (C)) from the time of extraction, and the tip (6b) opens. Invade (8). After that, the tip (6b) is the guide rail (3)
It suffices to rotate the ejector (6) so that the ejector (6) moves away from the end (see arrow A2 in Fig. 3 (D)), and the tip end (6b) engages with the edge (8a) of the opening (8) and is free. Although the rotation is regulated, the turning force for the ejector (6) is continuously applied, so that a force in the direction of pushing the printed wiring board (4) against the screw shaft (9) acts as a reaction force. (See arrow C2 in FIG. 3 (D)). Since this reaction force is amplified by the lever action, the connector (7
a) (7b) can be securely fitted together.

Since the amount of eccentricity between the printed wiring board (4) and the ejector (6) is small during the above insertion / removal work, an eccentric load is less likely to be applied to the printed wiring board (4) and the connector (7b). The possibility of damaging the printed wiring board (4) and the connector (7b) is significantly reduced. Further, since the force associated with the operation of the ejector (6) directly acts on the printed wiring board (4), it is not necessary to use a connector panel (5) having high physical strength, and the connector (5) 7a) (7b) can be securely fitted together.

Further, the ejector (6) does not vibrate even if some vibration is given in the state where the printed wiring board (4) is inserted, and the generation of abnormal noise can be prevented. Furthermore, both ejectors (6) need only mount the same molded member in opposite directions, and the other members can be mounted as they are, so that an increase in the number of necessary members can be prevented. Further, since the structure is simple as a whole and the size is made compact as a whole, structural restrictions around the mounting portion are reduced and versatility can be enhanced. further,
By changing the shape of the operation part (6a) of the ejector (6),
It can also be easily applied to printed wiring boards with bent connector panels.

<Embodiment 2> FIG. 4 is an exploded vertical sectional view showing another embodiment of the insertion / removal assisting device of the present invention. The difference from the above embodiment is that the ejector spacers (9d) (9e) are divided into two parts. Instead, one ejector spacer (9f) is used. One end of the ejector spacer (9f) is engaged with the ejector spacer (9f) and the other end is engaged with the ejector (6). Between the ejector (6) and the printed wiring board (4), a point was used in which the biasing spring (9g) (see FIG. 5) was used instead of the bending washer (9c) and only one flat washer (9a) was used. Only the inserted points. However, the urging spring (9g) urges the ejector (6) to rotate in the rotating direction at the time of extraction. Therefore, it is necessary to use biasing springs (9g) having biasing forces opposite to each other for the pair of ejectors (6).

Therefore, also in the case of this embodiment, the connectors (7a) and (7b) are disengaged from each other by rotating the ejector (6) in the same manner as in the above-mentioned embodiment, and the printed wiring board (4) is smoothly attached as it is. Can be removed. And
When the printed wiring board (4) is removed,
The ejector (6) is still rotated by the biasing spring (9g).

Therefore, when inserting the printed wiring board (4), the ejector (6) does not get in the way, and the printed wiring board (4) can be pushed in smoothly as in the above embodiment. When the connectors (7a) and (7b) are fitted together, the ejector (6) must be rotated against the biasing spring (9g), so that the force for operating the ejector (6) is reduced. Although it increases, it is not necessary to increase the biasing force of the biasing spring (9g), and a considerable amount of force is originally required to fit the connectors (7a) and (7b) together. The increase in power is almost negligible.

The present invention is not limited to the above-described embodiment, and for example, instead of directly screwing the screw shaft (9) into the connecting plate (5a), the screw shaft (9) is inserted into the hole of the connecting plate (5a). Then
A nut can be screwed onto the protruding end of the screw shaft (9), and a coil spring can be used in place of the bending washer (9c). It is possible to make various design changes within.

<Effect of Device> As described above, the first device has a simple structure,
The operability in inserting and removing the printed wiring board having the connector panel can be enhanced, and the practicable effect peculiar to the connector can be ensured.

The second invention has a unique practical effect that the rattling of the ejector can be prevented with a simple structure and that the ejector can be held at a position that does not interfere with the insertion.

The third invention also has a unique practical effect that the rattling of the ejector can be prevented with a simple structure and that the ejector can be held at a position where it does not interfere with the insertion.

The fourth invention is a practicable practicable technique in which an increase in the force for operating the ejector can be suppressed and the operability can be improved, although the force for preventing the rattling of the ejector is applied. Produce the desired effect.

[Brief description of drawings]

FIG. 1 is an exploded vertical sectional view showing an embodiment of an insertion / extraction assisting device of the present invention, FIG. 2 is a plan view of the same as above, FIG. 3 is a plan view for explaining an inserting / extracting operation, and FIG. 4 is an insertion / extraction assisting device of the present invention. FIG. 5 is an exploded vertical sectional view showing another embodiment of the device, FIG. 5 is a perspective view of a main part of the same, and FIG. 6 is a partially cutaway perspective view showing an electronic device incorporating a printed wiring board insertion / extraction assisting device. FIG. 8 is a perspective view showing a conventional example. (1) …… Square tubular casing, (2) …… Mother board, (3) …… Guide rail, (4) …… Printed wiring board, (5) …… Connector panel, (6) …… Ejector, (8) …… Opening, (9) …… Screw shaft, (9c) ……
Bending washer, (9d) (9e) (9f) …… ejector spacer, (9g) …… bias spring

Claims (4)

[Scope of utility model registration request] 1. A plurality of pairs of guide members, each having a mother substrate (2) attached to the inner rear portion of a rectangular tubular casing (1) and attached to inner surfaces of the tubular casing (1) facing each other. In an electronic device having a plurality of printed wiring boards (4) detachably mounted by (3), each printed wiring board (4) has a connector panel (5) on the extraction side. , Each printed wiring board (4)
A shaft member (9) (9d) (9e) (9f) that also functions as a connecting shaft between the printed wiring board (4) and the connector panel (5) is provided at a predetermined position on the extraction side end of the The ejector (6) is rotatably attached to the members (9) (9d) (9e) (9f), and further has a shaft member (9).
A rotation restricting member (9c) for restricting free rotation of the ejector (6) between the ejectors (6) and (9d) (9e) (9f).
(9g), and also has rotation restricting portions (3) and (8) for restricting rotation of the ejector (6) at a predetermined position of the cylindrical casing (1). Printed wiring board insertion / removal assistance device for electronic equipment. 2. The printed wiring board insertion / extraction assist device for an electronic device according to claim 1, wherein the rotation restricting member is a washer (9c) curved so as to bulge in one direction. 3. A rotation restricting member, one end of which is a shaft member (9).
The printed wiring board insertion / extraction assist device for an electronic device according to claim 1, wherein the utility model registration is a coil spring (9g) fixed to (9f) and the other end of which is engaged with an ejector (6). 4. The ejector (6) is a spacer (9d) (9e).
The printed wiring board insertion / extraction assist device for an electronic device according to any one of claims 1 to 3, wherein the utility model registration is rotatably mounted on a shaft member (9) via (9f).