JPH0756918B2 - Electronic circuit package insertion / removal mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Overview Regarding an insertion / extraction mechanism for an electronic circuit package, a lock-type insertion / extraction mechanism for an electronic circuit package, which is safe and easy to operate, is inserted in a backboard of a shelf unit in a plug-in manner. An insertion / removal mechanism that is mounted near the top and bottom of the front end portion of the electronic circuit package to be mounted for the purpose of inserting / removing the electronic circuit package, and has a lever having an arm portion on one side and a bifurcated claw portion on the other side. A urging means for rotatably attached to the front part of the package and a substantially L-shaped stopper rotatably attached to the arm part having an engaging protrusion at the tip thereof, and urging the stopper in the electronic circuit package insertion direction. And an engagement member with which the engagement protrusion of the stopper engages is provided in the electronic circuit package.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for inserting and removing electronic circuit packages.

In the vertical mounting of a printed wiring board such as a communication device, an electronic circuit package (also referred to as a printed wiring board unit) by mounting a plurality of electronic components such as ICs and LSIs on which electronic circuits are formed on a printed wiring board And the electronic circuit package is vertically mounted by a plug-in method by fitting a connector on a backboard provided in a box-shaped shelf to form a shelf unit. In the connector that connects the electronic circuit package and the backboard in this way, high-density mounting is progressing with ICs, LISs, etc. mounted on the electronic circuit package, so the connector has been increased in pin count. , The fitting force is increasing. In such a shelf unit, it is desired that the electronic circuit package can be easily inserted into and removed from (attached to) the backboard.

In recent years, communication devices, etc. are required to be seismic resistant and have optical connectors by adopting optical components. Therefore, a lock structure for seismic resistance or a lock structure against the repulsive force of the optical connector is required, and space is saved. There is a demand for an electronic circuit package insertion / extraction mechanism that can be locked or unlocked by a simple operation.

Conventional Technology Conventionally, as shown in FIGS. 6 (a), (b), and (c),
An electronic circuit package insertion / extraction mechanism utilizing the lever principle is used. According to this conventional example, a lever 10 as shown in the drawing is attached rotatably above and below the front edge of the electronic circuit package 1 about a pin 11, and when the electronic circuit package is inserted, as shown in FIG. 6 (b), The front claw 10a of the lever 10 is hooked on the protrusion 2a of the shelf 2 so that the upper portion 10c of the lever 10
By rotating the counterclockwise direction similar to the insertion direction A, the electronic circuit package 1 can be easily utilized by utilizing the lever principle.
When inserting the electronic circuit package 1 into the shelf 2 and pulling out the electronic circuit package 1, the rear claw portion 10b of the lever 10 is pressed against the front surface 2b of the shelf 2 as shown in FIG. 6 (c).
By rotating the upper part 10c of the same in the clockwise direction similar to the pulling direction B, the electronic circuit package 1 can be easily pulled out from the shelf 2 by utilizing this principle.

By providing the lever 10 and utilizing this principle, the fitting force between the connector (not shown) provided at the rear edge of the electronic circuit package 1 and the backboard connector (not shown) on the shelf 2 side is set. The operability for is improved.

As shown in FIG. 6 (a), when the electronic circuit package is pulled out due to the vibration of the electronic circuit package or the repulsive force of the optical connector, the surface plate 3 is attached to the front surface of the shelf 2 with screws 4 after the electronic circuit package is inserted. The electronic circuit packages were either fixed with or fixed with an exclusive metal fitting, or the electronic circuit packages were individually screwed.

However, in the method of holding the electronic circuit package with the surface plate of the shelf, etc., the surface plate must be removed during the test and internal adjustment, and when the optical connector is used, the spring of the connection part must be removed. There is a problem that the electronic circuit package may come off due to the action. Also, in the method of using metal fittings to prevent the electronic circuit package from coming off or fixing each electronic circuit package with screws,
Therefore, there is a problem that a space for that is required and the mounting density is reduced.

In order to solve these problems, the present inventors utilize the principle of leverage to insert and remove an electronic circuit package, and
A stopper made of spring was attached to the arm part of the lever, and when the electronic circuit package was inserted, this stopper was locked to the engaging part of the electronic circuit package. An electronic circuit package insertion / removal mechanism was previously proposed (Japanese Patent Application No. 62-103186). . The operation of the conventional example described in this prior application is shown in FIG.

In FIG. 7, the electronic circuit package 12 has a front plate 13 on its front surface, and a lever 14 is provided with a stopper 15 having a spring property. FIGS. 7A to 7C are operation explanatory views of the electronic circuit package inserting step, in which the stopper 15 is locked to the surface plate 13 of the electronic circuit package when the electronic circuit package is inserted.

Problems to be Solved by the Invention FIGS. 7 (d) to 7 (f) show an operation stopper at the time of pulling out an electronic circuit package. As shown in FIG. 7 (e), the upper portion 15a of the stopper 15 is pushed by a finger. Electronic circuit package 12
Therefore, a large gap s between the surface plate 13 and the upper portion 15a of the stopper is required. For this reason, the amount of protrusion of the lever toward the front side increases, which is not very desirable in appearance. Further, there is a problem that a strong force is required to push the fulcrum portion of the spring stopper when the electronic circuit package is pulled out.

The present invention has been made in view of the above points, and an object thereof is to provide a lock-type insertion / removal mechanism for an electronic circuit package that is safe and has good operability.

Means for Solving the Problems In the insertion / extraction mechanism to be inserted / extracted for the purpose of inserting / extracting the electronic circuit package in the vicinity of the top and bottom of the front end portion of the electronic circuit package which is inserted and mounted in a plug-in manner on the backboard of the shelf unit, A lever having a forked claw on the other side of the arm is rotatably attached to the front of the electronic circuit package. A substantially L-shaped stopper having an engaging protrusion at the tip is rotatably attached to the arm portion of the lever, and urging means for urging the stopper in the electronic circuit package insertion direction is provided, and the electronic circuit package has a stopper. An engaging member with which the engaging portion of is engaged is provided.

Action When inserting the electronic circuit package, by pushing the arm part of the lever in the inserting direction, one of the claw parts of the lever engages with the protruding part of the shelf to push in the electronic circuit package by the lever principle and the tip of the stopper is The biasing means is elastically deformed while sliding the engagement member provided in the electronic circuit package, and when the insertion is completed, the engaging protrusion of the stopper engages with the engagement member and the stopper is acted upon by the biasing force of the biasing means. Locked. As a result, the electronic circuit package does not come out of the shelf to the front side due to vibration or repulsive force of the optical connector.

On the other hand, when the electronic circuit package is pulled out, by pulling the upper portion of the stopper in the electronic circuit package withdrawing direction, the stopper rotates and the lock between the stopper and the engaging member is released. By further pulling the stopper, the claw portion of the lever engages with the front surface of the shelf and the electronic circuit package can be easily pulled out by the lever principle.

Embodiments Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 shows an exploded perspective view of an embodiment of the present invention. A hole 22 for mounting a lever, which will be described later, is provided on the lower side of the front end portion of the electronic circuit package 21, and an engaging member 23 with which a stopper, which will be described later, is engaged is further mounted. The engaging member 23 has a hook 23a at both ends and a recess 23b. The engaging member 23 has a U-shape having hooks 23a at both ends and a recess 23b.
This is because the engaging member 23 is shared above and below the electronic circuit package.

Reference numeral 24 denotes a lever, and this lever 24 is provided with a hole 25 for attaching the lever to the electronic circuit package 21, an arm portion 26 is provided on one side of the hole 25, and a bifurcated claw portion is provided on the other side.
27a and 27b are provided. The arm portion 26 is provided with a square hole 28 into which a stopper described later is inserted.
A hole 29 for attaching a stopper is provided through the hole. Further, a concave portion 26a and both end convex portions 26b are formed on the upper end of the arm portion 26. Reference numeral 30 denotes a groove for inserting and attaching the lever 24 into the electronic circuit package 21.
The lever 24 is rotatably attached to the electronic circuit package 21 by inserting the front end portion of this into the groove 30 and inserting the pin 32 into the hole 22 of the electronic circuit package 21 and the hole 25 of the lever 24.

34 is a stopper, which is a bifurcated foot portion 35 and an arm portion 36.
And a protrusion 37. The arm portion 36 is provided with an engagement protrusion 36a having an inclined surface that engages with the engagement member 23. A stopper 34 is attached to the foot 35 with a pin 38 and a lever 24.
A hole 39 is provided for rotatably attaching to the.
The spring 40 is inserted into the bifurcated leg portion 35 of the stopper 34 as shown by the broken line, and has the function of rotating the stopper 34 in the direction of the electronic circuit package about the pin 38. In the free state, the arm 41 is open.

To assemble the above-mentioned components, first insert the spring 40 into the foot portion 35 of the stopper 34, bend the arm 41 of the spring 40 inward, and insert the stopper 34 and the spring 40 into the square hole 28 of the lever 24. insert. Next, the pin 38 is inserted into the hole 29 of the lever and the hole 39 of the stopper, and the stopper 34 is rotatably attached to the lever 24. At this time, one of the arms 41 of the spring 40 pushes the A surface of the lever 24 as shown in FIG.
Since the B side of 34 is pushed, the stopper 34 is rotated in the electronic circuit package direction.

Next, with the lever 24, the stopper 34, and the spring 40 integrated, the groove 30 of the lever 24 is inserted into the front surface of the electronic circuit package 21, and the hole 25 of the lever 24 and the hole 22 of the electronic circuit package 21 are inserted. The pin 32 is inserted to rotatably attach the lever assembly to the electronic circuit package 21. The engaging member 23 is fixed to the electronic circuit package 21 by using a screw or the like at a position where the engaging protrusion 36a of the stopper 34 contacts the hook portion 23a of the engaging member 23 when the lever 24 is rotated toward the electronic circuit package 21. .

FIG. 2 is a perspective view showing an inserted state of an electronic circuit package adopting the insertion / removal mechanism of the above-described embodiment. 42 is a shelf unit, and electronic circuit package in shelf 44
It is configured by vertically mounting 46 and 48. The electronic circuit package 46 is an optical connector that is mounted on a backboard (not shown), and has the stopper 34 shown in FIG. 1 to prevent the optical connector from coming off due to the repulsive force of the optical connector. On the other hand, the electronic circuit package 48 is mounted on the backboard with an electric connector, and the lever 24 of the embodiment shown in FIG.
Only attached. Surface plate 50 prevents slipping off due to vibration
It is achieved by holding down the electronic circuit package 48 in. This is because the electrical components are also mounted on the electronic circuit package 48 where the engaging members 23 are mounted to increase the density. As described above, in the insertion / removal mechanism of the present invention, the stopper 34 and the like can be removed and the lever 24 can be used alone.

FIG. 3 is an explanatory diagram showing the operation of inserting and locking the electronic circuit package. FIG. 3A shows an electronic circuit package.
21 shows the state before insertion of 21 and the front claw portion 27a of the lever 24.
Is located above the shelf protrusion 44a. From this position, the electronic circuit package 21 is inserted in the direction of arrow A while rotating the lever 24 counterclockwise. (B) is a lever
The front claw portion 27a of 24 is placed inside the shelf protrusion 44a, and the lever is used as a fulcrum to utilize this principle.
The lever 24 is rotated until the engaging projection 36a of the stopper 34 comes into contact with the C surface provided on the hook portion 23a of the engaging member 23 by pushing 26 in the counterclockwise direction.

FIG. 3 (c) shows a state in which the lever 24 is further rotated counterclockwise, and the stopper 34 rotates clockwise around the pin 38 to deform the spring 40 and the hook portion of the engaging member 23. The protrusion 37 of the stopper 34 is located in the upper portion of the recess 23a, and is in the recess 26a of the lever 24. (D) shows a state in which the electronic circuit package 21 is completely inserted, and the stopper 34
Is locked by the repulsive force of the spring 40 into the recess 23b of the engaging member 23. In this state, when the repulsive force of the optical connector acts to pull out the electronic circuit package, the front claw portion 27a of the lever 24 is engaged with the shelf protrusion 44a, and the lever 24 is rotated clockwise around that point. And try to get out. However, since the lever 24 is locked to the engaging member 23 by the stopper 34, the lever 24 does not rotate and the electronic circuit package 21 does not come out. That is, the electronic circuit package 21 is fixed to the shelf 44.

FIG. 4 is an explanatory diagram showing unlocking and pulling-out operations of the electronic circuit package. FIG. 4 (a) shows a locked state before being pulled out. At this time, the protrusion 37 of the stopper 34 is located slightly above the upper end of the lever 24, and is in a state where it is easy for a finger to hit. (B) shows a state in which the lock is released, and by pulling the protrusion 37 of the stopper 34 with a finger, the stopper 34 is rotated clockwise and the lock with the engaging member 23 is released. Even if the protrusion of the lever 24 is shortened from the front surface of the electronic circuit package, the protrusion 37 of the stopper 34
It is provided to improve the operability of the finger in this operation. Moreover, since the spring 40 is operated at a position away from the fulcrum, the spring 40 can be deformed with a light operating force.

FIG. 4C shows the operation after the lock is released. When the stopper 34 is pulled, the stopper and the lever 24 come into contact with each other, and the lever 24 is rotated clockwise. At this time, the electronic circuit package 21 is not pulled out and only the lever 24 is rotated, so that the lever 24 is rotated with a weak force. (D) is a state in which the electronic circuit package 21 is pulled out, and the rear claw portion 27b of the lever 24 is the front surface 44b of the shelf 44.
Therefore, the stopper 34 and the lever 24 are integrally rotated by this principle with this point as a fulcrum. In this case, the stopper
The wide surface which is the base of the arm portion 36 of 34 is pushed so that the entire fingertip hits the stopper, thereby reducing the resistance. Further, since the distance from this fulcrum is also longer than when the arm portion 26 of the lever 24 is pushed, it can be rotated with a light force. Although the embodiment of the present invention has been described above with reference to FIGS. 1 to 4, the spring 40 in FIG. 1 may be a leaf spring, and the counterclockwise rotating force of the stopper 34 does not use the spring. It is also possible to rotate with the stopper's own weight. The electronic circuit package 46 of FIG. 2 is provided with the stoppers 34 and the like on the upper and lower sides, but it is also possible to attach it on only one of the upper and lower sides and attach the lever 24 only on the other side as in the electronic circuit package 48.

FIG. 5 is an exploded perspective view of another embodiment of the present invention, in which the center of the foot portion 58 of the stopper 56 is formed in a U shape, and its elasticity is utilized to provide a spring function. . In addition, a protrusion 59 is provided on the side surface of the foot, and this protrusion 59 is used for the square hole of the lever 54.
The rotary shaft was formed by inserting it into a hole 57 provided on the side surface of 55. The electronic circuit package 51 is provided with a notch 53 having the same shape as the engaging member 23 of the above-described embodiment so as to have the function of the engaging member. By configuring as above,
It is possible to obtain the same effect as that of the above-described embodiment by reducing the number of parts.

EFFECTS OF THE INVENTION As described above, according to the present invention, less force is required for unlocking, and the protrusion of the lever from the front surface of the electronic circuit package can be shortened. Therefore, safety, operability, and appearance are improved. Also, it is possible to provide an excellent lock-type insertion / removal mechanism for an electronic circuit package.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an embodiment of the present invention, FIG. 2 is a perspective view showing an inserted state of an electronic circuit package, FIG. 3 is an explanatory view showing an operation of inserting and locking an electronic circuit package, and FIG. FIG. 5 is an explanatory view showing an unlocking operation and an extracting operation of the electronic circuit package, FIG. 5 is an exploded perspective view of another embodiment of the present invention, FIG. 6 is an explanatory view of a conventional example, and FIG. 7 is an operation of another conventional example. FIG. 21 ... Electronic circuit package, 23 ... Engaging member, 24 ... Lever, 26 ... Arm part, 27a ... Front claw part, 27b ... Rear claw part, 30 ... Groove, 34 ... Stopper, 35 …… Foot, 36 …… Arm, 37 …… Projection, 40 …… Spring, 44 …… Shelf.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Nao Sato 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (72) Inventor Toshikazu Magome 1015, Kamedotachu, Nakahara-ku, Kawasaki City, Kanagawa Prefecture, Fujitsu Limited (56) Bibliography Reference: Sho 50-110762 (JP, U)

Claims (1)

[Claims] 1. An insertion / removal mechanism which is mounted for insertion / removal of an electronic circuit package near the top and bottom of a front end portion of an electronic circuit package which is plugged in and mounted on a backboard of a shelf unit. Arm part (26) on the other side with bifurcated claw parts (27a, 27
Electronic circuit package (21) with lever (24) having b)
Rotatably attached to the front part of the arm, and rotatably attached to the arm part (26) a substantially L-shaped stopper (34) having an engaging projection (36a) having a sloped tip. A biasing means (40) for biasing the (34) in the insertion direction of the electronic circuit package is provided, and an end portion where the engaging projection (36a) of the stopper (34) is engaged with the electronic circuit package (21) is provided. An engaging member (23) having an inclined surface shape is provided, and when the electronic circuit package is inserted, the arm portion (26) of the lever (24) is pushed in the inserting direction so that the claw portion (27a) of the lever (24). ) Engages with the protrusion (44a) of the shelf and pushes the electronic circuit package (21) by the lever principle,
When the insertion is completed, the engaging projection (36a) of the stopper (34)
By the urging force of the urging means (40).
3) is engaged and locked. On the other hand, when pulling out the electronic circuit package, by pulling the upper part of the stopper (34) in the pulling direction of the electronic circuit package, the stopper (34) rotates and engages with the stopper (34). Release the lock with the mating member (23), and then press the stopper (3
4) By pulling, the claw part (27b) of the lever (24) engages with the front surface (44b) of the shelf and the electronic circuit package (2
1) An electronic circuit package insertion / removal mechanism characterized by leveraging the lever.