JP2795608B2 - Ejector for printed circuit board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ejector for a printed circuit board, and more particularly to an ejector mounted on a printed circuit board housed in a storage case.

[0002]

2. Description of the Related Art Conventionally, there has been known an ejector for a printed circuit board (hereinafter, referred to as an "ejector") for facilitating the operation of pulling out a printed circuit board stored in a storage case from the storage case. For example, FIG.
The ejector 101 shown in FIG. 1 includes a holding piece 111 for holding the printed circuit board 40, a finger hook 103 as a point of force, a lever 108 having a pressing part 104 as an operating point that comes into contact with the chassis 52, and the lever 108.
It is constituted by a pin 105 which is pivotally supported so as to swing. When the electrode section 43 of the printed board 40 on which the ejector 101 is mounted is inserted into the connector 53 of the storage case 50, as shown in FIG. The stop angle is not constant, which causes inconvenience in inspecting and attaching / detaching the printed circuit board 40.

In order to solve such inconvenience, Japanese Utility Model Publication No. 55-55
In No. 40783, as shown in FIG. 9, a projection 209 is provided inside the holding piece 211, and the projection 209 and the other holding pieces 21 are provided.
A configuration in which the position of the ejector 201 is fixed by slightly reducing the distance d between the ejector 201 and the thickness of the printed circuit board 40 is disclosed.

[0004]

However, in the ejector 201 of Japanese Utility Model Publication No. 55-40783, the ejector 201 is swung from the state where the printed circuit board 40 is stored in the storage case 50 (see FIG. 8) to act as a roller. In this case, it is necessary to apply a large force against the frictional force of the convex portion 209 to the finger hook portion 203, which is a point of emphasis, as compared with the case without the convex portion 209. A large force is applied to the pressing portion 204 as an action point. For this reason, there is a problem that the impact between the pressing portion 204 and the chassis 52 (see FIG. 8) of the storage case 50 is larger than that without the convex portion 209.

In addition, while the ejector 201 is swung many times, the convex portion 209 wears out, and the distance d between the convex portion 209 and the other holding piece 212 increases from the initial state, thereby maintaining the position of the ejector 201. There was a problem in terms of durability that it would not be possible. Further, when the protrusion 209 is formed slightly higher than a predetermined height, the protrusion 209 and the other holding pieces 212 are formed.
The distance d becomes too narrow, and the ejector 201 does not swing smoothly. Conversely, if the distance d is slightly reduced, the distance d becomes too large, and the posture of the ejector 201 cannot be maintained. Therefore, such a protrusion 20
The molding of No. 9 required high precision.

[0006] The present invention has been made in view of the above problems, the invention of claim 1 wherein has an object to provide a printed circuit board ejector which can reduce the impact of the storage case. In addition, a second aspect of the present invention, a high precision without requiring the time of molding, the printed circuit board for the purpose of reliably providing the ejector printed substrate holding the posture of the ejector when housed in storage case for a long time .

[0007]

In order to solve the above-mentioned problems, the invention according to claim 1 is supported by a swing shaft provided at a corner portion of a printed circuit board, and when the printed circuit board is pulled out of a storage case, In a printed circuit board ejector that acts as a pivot with a finger hook as a point of force, a swing axis as a fulcrum, and a pressing portion as an operating point, the pressing portion is configured to be stored when the pressing portion comes into contact with the storage case. The case is provided with an elastic member capable of being displaced in the direction of the force exerted on the pressing portion.

Further, the pressing portion comprises a rigid member to which the storage case is not displaced in the direction of the force on the pressing part when the said housing case and the pressing portion in contact, the tip of the elastic member is a rigid It is characterized by being provided so as to protrude from the member toward the storage case side.

[0009] According to a second aspect of the invention, a printed ejector substrate according to claim 1, wherein when the printed circuit board is the stored in the storage case and the storage case and the pressing portion is in contact, said printed circuit board A restricting member which is in contact with an end face on the front side of the finger is provided on the finger hook portion side of the swing shaft.

[0010]

The ejector for a printed board according to claim 1 is
When pulling out the printed circuit board from the storage case, when the finger hook is acted as a force with the finger hook as the fulcrum, the swing axis as the fulcrum, and the pressing portion as the point of action, even if an excessive force is applied to the finger hook, the pressing Since the elastic member of the portion can be displaced in the direction of the force exerted by the storage case, the impact between the pressing portion and the storage case is reduced.

Further, the ejector printed circuit board according to claim 1, wherein, when a force is applied to the finger rest when pulling the printed circuit board from the storage case, the elastic member of the pressing portion is first the force by the force received from the storage case To reduce the impact between the pressing portion and the storage case. At this time, the distal end of the elastic member is displaced by an amount protruding from the rigid member, and both the distal end of the elastic member and the rigid member are in contact with the storage case. After that, the rigid member of the pressing portion functions as a point of action of the parachute.

According to a second aspect of the present invention, in addition to the above operation, when the printed circuit board is stored in the storage case, the elastic member contacts the storage case and is displaced in the direction of the force exerted by the storage case. Therefore, a moment about the swing axis is generated, whereby the regulating member is pressed against the front end surface of the printed circuit board. For this reason, the printed board ejector is held in a state of being pressed against the front end face of the printed board.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view of a printed circuit board ejector according to a first embodiment. FIG.
(B) is a front view, FIG. 1 (c) is a bottom view, and FIG.
1A is a right side view. The printed circuit board ejector (hereinafter, referred to as “ejector”) 1 of the first embodiment includes two holding pieces 11 and 12, a finger hook 3, a pressing section 4, and the like. The ejector 1 is of a type attached to the right corner (see FIG. 2) of the printed circuit board 40, and the type attached to the left corner is formed symmetrically. Therefore, the description of the latter will be omitted.

The two holding pieces 11 and 12 are connected to the ejector 1
Substantially parallel to each other.
The distance between the holding pieces 11 and 12 is set slightly larger than the thickness of the printed circuit board 40. In addition, both holding pieces 1
1 and 12 are each formed in a substantially parabolic shape, and an opening 7 for inserting the printed circuit board 40 is formed at the tip side (see FIG. 1E). In addition, both holding pieces 11,
12, the pin insertion holes 1 are located at positions facing each other.
1a and 12a are drilled.

The finger hook 3 is provided at one end of the ejector 1. The finger hook 3 has unevenness 3a as a non-slip.
Is provided. Between the pin insertion holes 11a, 12a provided in the holding pieces 11, 12 and the finger hook 3, a regulating member 22 is provided.
Is provided. The restricting member 22 is connected to the ejector 1
When the printed circuit board 40 to which is attached is stored in the storage case 50, the printed circuit board 40 comes into contact with the front end surface 40 a of the printed circuit board 40 (see FIG. 2A), and separates when the printed circuit board 40 is pulled out from the storage case 50. (See FIG. 2C).

The pressing portion 4 is provided at the other end of the ejector 1. The pressing part 4 includes a rigid part 15 and an elastic part 16.
Consists of The rigid part 15 is formed by two substantially arc-shaped parallel pieces 17 and 18 and a bridging piece 19 bridging the parallel pieces 17 and 18. Each parallel piece 17, 18 and each holding piece 11, 1
Since the width W (see FIG. 1B) of the connecting portion with the second member 2 is sufficiently large, even if a vertical force acts on the rigid piece 15 in FIG. The rigid piece 15 is not displaced with the connecting portion as a fulcrum. On the other hand, the elastic piece 16 is formed in a substantially L-shape, and is provided in an elongated hole 21 provided on the upper surface 14 of the ejector 1 on the pressing portion 4 side. The distal end 16a of the elastic piece 16 projects below the rigid piece 15 as shown in FIG. Elastic piece 1
6 has such a structure, when an upward force acts on the distal end 16a of the elastic portion 16 in FIG. 1B, the elastic portion 16 moves upward about the fulcrum portion 16b. Is displaced.

Next, a method of using the ejector 1 of the present embodiment will be described. 2A and 2B are schematic explanatory views showing a swinging process of the ejector. FIG. 2A is an explanatory view when a printed circuit board is stored in a storage case, and FIG. FIG. 2C is an explanatory view showing a state where the printed circuit board is being housed in or removed from the housing case.

To mount the ejector 1 on a predetermined printed circuit board 40, the opening 7 of the ejector 1 is inserted into the right corner of the printed circuit board 40, and a hole 41 formed in the printed circuit board 40 and a pin insertion hole 11a of the ejector 1 are inserted. 12a are aligned with each other, and a spring pin (hereinafter referred to as a “pin”) 5 as a swing shaft is inserted into the pin insertion hole 11a,
12a and perforation 41. FIG.
(A) to (c) show the printed circuit board in a state where the above-described mounting operation has been completed. Thus, the printed circuit board 40
Is swingable about the pin 5. The ejector 1 is symmetrical to the left corner of the printed circuit board 40.

Next, the operation of removing and inserting the printed circuit board 40 to which the ejector 1 is attached into and out of the storage case 50 will be described. First, a case where the printed circuit board 40 to which the ejector 1 is attached is removed from the storage case 50 will be described. In the state shown in FIG. 2A, the ejector 1 is swung clockwise about the pin 5 by placing a finger on the unevenness 3 a of the finger hook 3 of the ejector 1. Then, the elastic piece 1
The elastic portion 16 is displaced in the counterclockwise direction about the fulcrum portion 16b by an amount corresponding to the tip 16a of the 6 protruding from the rigid portion 15, and reaches the state shown in FIG. For this reason, even if an excessive force is applied to the finger hook 3 which is the point of emphasis, there is an effect that the shock between the pressing portion 4 and the chassis 52 is reduced by the cushioning function of the elastic piece 16. After that, the finger hook 3 acts as a point of force, the pin 5 acts as a fulcrum, and the rigid part 15 of the pressing part 4 acts as a point of application (see FIG. 2C). Therefore, the electrode portion 43 (see FIG. 8) of the printed circuit board 40 can be easily pulled out from the connector 53 (see FIG. 8) of the storage case 50 with a small force. At this time, since the finger hooks 3 are provided with anti-slip irregularities 3a, they can be more easily pulled out.

Next, a case where the printed board 40 to which the ejector 1 is attached is inserted into the storage case 50 will be described. First, the side of the electrode portion 43 of the printed circuit board 40 (FIG. 8)
The printed circuit board 40 is inserted along the guide rail 51 provided on the storage case 50 so that the printed circuit board 40 (see FIG. 8) faces the connector 53 (see FIG. 8) of the storage case 50. When the printed circuit board 40 is stored in the storage case 50, the rigid piece 15 of the pressing portion 4 reaches a position where the rigid portion 15 contacts the chassis 52 of the storage case 50. At this time, the force exerted by the chassis 52 on the rigid piece 15 generates a counterclockwise moment on the pin 5. Therefore, the ejector 1 is further housed in the housing case 50 while swinging counterclockwise (see FIG. 2C). Then, the electrode portion 43 of the printed board 40 is fitted into the connector 53 of the storage case 50 (see FIG. 2A). At this time, the tip 1 of the elastic piece 16
6a is slightly pressed from the chassis 52, and stops in a state where the front end surface 40a of the printed circuit board 40 and the regulating member 22 of the ejector 1 are in contact with each other. That is, the ejector 1 is pressed against the end face 40a of the printed circuit board 40, and the ejector 1 is securely held in this posture.

Since the elastic piece 16 can be displaced about the fulcrum 16b in the direction of the force exerted by the chassis 52 (counterclockwise in FIG. 2), the elastic piece 16 and the regulating member 22 can be displaced.
Even if it is not installed with high precision, the elastic piece 16 is displaced to absorb the error. For this reason, the posture of the ejector 1 can be reliably held in the state of FIG. Therefore, when the ejector 1 is formed, high accuracy is not required, and an effect that yield is improved and cost is reduced is achieved. Further, even if the elastic force of the elastic piece 16 is deteriorated due to long-term use, the pressing force for pressing against the end surface 40a of the printed circuit board 40 only changes, so that the posture of the ejector 1 is still in the state of FIG. Can be held. That is, there is an effect that the posture of the ejector 1 can be maintained regardless of long-term use.

The ejector 1 of this embodiment also has the following effects. That is, when the pressing portion 4 does not include the elastic piece 16 and the pressing portion 4 comes into contact with the storage case 50 when the printed circuit board 40 is stored in the storage case 50, the regulating member 22 and the front side of the printed substrate 40 are End face 4
Oa makes contact with Oa to prevent the ejector 1 from swinging, so that the printed circuit board 40 cannot be pushed into the storage case 50 side from that position. When such a situation occurs, the electrode portion 43 provided on the printed circuit board 40
May not be reliably inserted into the connector 53 provided on the storage case 50 side. On the other hand, according to the present embodiment, the elastic portion 16 of the pressing portion 4 can be displaced in the counterclockwise direction around the fulcrum portion 16b.
Since the tip 16a of the projection protrudes from the rigid piece 15,
As shown in FIG. 2A, the swing of the ejector 1 is
Can be pushed into the storage case 50 side even after being blocked by (see FIG. 3). Therefore, the electrode portion 43 can be securely inserted into the connector 53.

Next, a second embodiment will be described. FIG.
4A and 4B are explanatory views of a printed circuit board ejector according to a second embodiment. FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.
4C is a bottom view, FIG. 4D is a BB cross-sectional view, and FIG.
(E) is a right side view. Ejector 61 of the second embodiment
Has the same configuration as the ejector 1 except that the configuration of the pressing portion 64 is different from that of the pressing portion 4 of the ejector 1 of the first embodiment. Is omitted.

The pressing portion 64 of the ejector 61 includes a rigid piece 75 and an elastic piece 76. Rigid piece 75
Is formed by two parallel pieces 77 and 78 having a substantially arc shape, and does not have a bridge piece. On the other hand, the elastic piece 76 is provided in a long groove 71 provided on the pressing portion 64 side on the upper surface 14 of the ejector 61. The distal end 76a of the elastic piece 76 is formed in a substantially arc shape, and protrudes below the rigid piece 75 as shown in FIG. Since the elastic piece 76 has such a structure, the tip 76a of the elastic piece 76
4B, when an upward force is applied, the elastic piece 76 is displaced upward about the fulcrum portion 76b. The operation and effect of the ejector 61 of the second embodiment are substantially the same as those of the first embodiment, and therefore, the description thereof will be omitted.

Next, a third embodiment will be described. FIG.
5A and 5B are explanatory views of a printed circuit board ejector according to a third embodiment. FIG. 5A is a plan view, FIG. 5B is a front view, and FIG.
5C is a bottom view, FIG. 5D is a cross-sectional view taken along line CC, and FIG.
(E) is a right side view. Ejector 81 of the third embodiment
Is substantially the same as the ejector 1 except that the configuration of the pressing portion 84 is different from that of the pressing portion 4 of the ejector 1 of the first embodiment. Is omitted.

The pressing portion 84 of the ejector 81 comprises a rigid piece 95 and an elastic piece 96. Rigid piece 95
Are formed by two substantially arc-shaped parallel pieces 97, 98 and a bridging piece 99 bridging the parallel pieces. On the other hand, on the front side and the back side of the ejector 81, rods are provided along the upper surface 14, respectively.
The elastic portion 96 is closer to the pressing portion 84 than the pressing portion 84 is. Elastic piece 9
A long groove is provided between 6 and the upper surface 14. The distal end 96a of the elastic piece 96 projects below the rigid piece 95 as shown in FIG. 5B. Since the elastic piece 96 has such a structure, the tip 96a of the elastic piece 96
5B, when an upward force is applied, the elastic piece 96 is displaced upward about the fulcrum 96b. The operation and effect of the ejector 81 according to the third embodiment are substantially the same as those of the first embodiment, and therefore description thereof will be omitted.

Next, a fourth embodiment will be described. 6 and 7 are explanatory views showing a printed board ejector according to the fourth embodiment. FIG. 6 is a front view, FIG. 7 is a development view, FIG. 7 (a) is a front view, and FIG. FIG. 7 (c) is a rear view, FIG. 7 (e) is a left side view, and FIG. 7 (f) is an FF cross-sectional view. The ejector 31 of the fourth embodiment is substantially the same as the ejector 1 except that the configuration of the pressing portion 34 is different from that of the pressing portion 4 of the ejector 1 of the first embodiment, and that the mounting method is different from that of the ejector 1 because the device can be deployed. Since they have the same configuration, the same components are denoted by the same reference numerals, and description thereof will be omitted.

As shown in FIG. 7 (a), the ejector 31 is configured such that a divided body 31a including the holding piece 11 and the parallel piece 37 and a divided body 31b including the holding piece 12 and the parallel piece 38 are connected to a flexible hinge 32. Thus, a pin 33 is provided on the holding piece 11, and a pin insertion hole 12 a is provided on the holding piece 12. This ejector 3
7, the two divided bodies 31a and 31b are overlapped so that the pins 33 pass through the perforations 41 of the printed circuit board 40 in the unfolded state, that is, the state of FIG. By inserting it into the pin insertion hole 12a. Therefore, the first to third
There is an effect that the mounting operation is simplified as compared with the ejectors 1, 61, 81 of the embodiment.

The pressing portion 34 of the ejector 31 includes a rigid portion 35 and an elastic portion 36. Rigid piece 35
(See FIG. 6) are two parallel pieces 37, 3 having a substantially arc shape.
8 (see FIG. 7A), and does not have a member corresponding to the bridge piece 19 of the ejector 1. On the other hand, the elastic portion 36 is provided on the upper surface 14 of the ejector 31 by the pressing portion 3.
It is provided in a long groove 39 provided on the fourth side. The distal end 36a of the elastic piece 36 is formed in a substantially arc shape, and protrudes below the rigid piece 35 as shown in FIG. Since the elastic piece 36 has such a structure, when an upward force acts on the tip 36a of the elastic piece 36 in FIG.
The elastic piece 36 is displaced upward about the fulcrum portion 36b. The operation and effect of the ejector 31 of the fourth embodiment are the following.
The description is omitted because it is almost the same as the embodiment.

It is needless to say that the present invention is not limited to the above-described embodiments, but can be implemented in various modes as long as they belong to the technical scope of the present invention. For example, in the ejectors of the first to third embodiments, a pin as a separate body is inserted later when the ejector is mounted on a printed circuit board, but the pin member may be integrally formed with the ejector. In this case, for example, the mounting operation is completed only by inserting the corner of the printed circuit board 40 into the opening 7 of the ejector 1 and fitting the pin member into the hole 41 of the printed circuit board 40. The effect of simplification is obtained.

[0031]

Further, in each of the above embodiments, the ejector is provided with the regulating member. However, the regulating member may not be provided. In this case, the effect of securely holding the posture is slightly weakened, but other effects can be obtained in the same manner as in each of the above embodiments. As the elastic member, in addition to the elastic pieces of the above embodiments, for example, a coil spring, a leaf spring, an air cushion, a sponge, an elastic rubber, a damper, or the like may be used. The same operation and effect as described above can be obtained.

[0033]

As described above in detail, according to the printed circuit board ejector according to claim 1, wherein it is possible to alleviate the impact of the storage case. In addition, the printed circuit board ejector according to the second aspect does not require high precision at the time of molding, and can reliably maintain the position of the ejector when the printed circuit board is stored in the storage case for a long period of time.

[Brief description of the drawings]

1A and 1B are explanatory views of a printed circuit board ejector according to a first embodiment. FIG. 1A is a plan view, FIG. 1B is a front view, FIG. 1C is a bottom view, and FIG. ) Is an A-A sectional view,
FIG. 1E is a right side view.

FIG. 2 is a schematic explanatory view showing a swinging process of the printed board ejector of the first embodiment. FIG. 2 (a) is an explanatory view when the printed board is housed, and FIG. FIG. 2 (c) is an explanatory diagram showing the state when the printed circuit board is being housed or withdrawn.

FIG. 3 is an explanatory diagram when a printed circuit board to which the ejector for a printed circuit board of the first embodiment is mounted is stored in a storage case.

4 (a) is a plan view, FIG. 4 (b) is a front view, FIG. 4 (c) is a bottom view, and FIG. 4 (d). ) Is a BB sectional view,
FIG. 4E is a right side view.

5 (a) is a plan view, FIG. 5 (b) is a front view, FIG. 5 (c) is a bottom view, and FIG. 5 (d). ) Is a CC sectional view,
FIG. 5E is a right side view.

FIG. 6 is a front view of a printed board ejector according to a fourth embodiment.

7A and 7B are development views of a printed circuit board ejector according to a fourth embodiment. FIG. 7A is a front view, FIG. 7B is a bottom view, and FIG. 7C is an EE cross-sectional view. 7 (d) is a rear view,
FIG. 7E is a left side view, and FIG. 7F is a sectional view taken along line FF.

FIG. 8 is an explanatory view when a printed circuit board on which a conventional printed circuit board ejector is mounted is stored in a storage case.

9A and 9B are explanatory views of a conventional ejector for a printed circuit board, wherein FIG. 9A is a front view, and FIG. 9B is a D view of FIG. 9A.

[Explanation of symbols]

1, 31, 61, 81 ... ejector, 3 ... finger hook part, 4, 34, 64, 84 ... pressing part, 5.
..Pins, 11, 12,..., Holding pieces, 15, 35, 7
5,95 ... rigid piece, 16,36,76,96 ...
· Elastic piece, 16a, 36a, 76a, 96a ... tip, 16b, 36b, 76b, 96b ... fulcrum part,
22 ... regulating member, 40 ...
Printed circuit board, 40a ... end face,
50: storage case, 51: guide rail,
52 ... chassis

Claims (2)

(57) [Claims] 1. A printed circuit board, which is supported by a swing shaft provided at a corner of the printed circuit board. When the printed circuit board is pulled out of a storage case, a finger hook portion is used as a power point, the swing shaft is used as a fulcrum, and a pressing portion is used as a point of action. in the print ejector substrate acting as a child, the pressing portion includes: the storage case is displaceable elastic member in the direction of the force on the pressing part when the said housing case and the pressing portion in contact, pressing pressure When the unit comes into contact with the storage case,
Rigidity that the case does not displace in the direction of the force exerted on the pressing part
And a member, the housing cases than the tip of the elastic member is a rigid member
An ejector for a printed circuit board, which is provided so as to protrude toward a substrate side . 2. The printed circuit board is housed in the storage case.
When the storage case comes into contact with the pressing portion,
Position the regulating member in contact with the front end of the printed circuit board in front.
2. The printed board ejector according to claim 1, wherein the ejector is provided closer to the finger hook portion than the swing shaft .