JP2004158503A - Printed circuit board housing unit device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printed board housing unit device which enables printed boards to be easily inserted in or pulled out without increasing components in number, is reduced in size, and provided at a low cost. <P>SOLUTION: The unit device houses a plurality of the printed boards 6 each mounted with electronic parts. The unit device is equipped with the printed boards 6 which are each provided with an open elliptical cutout 10, an exclusive jig 9 having a columnar projection 16 to be inserted into the cutout 10, and a case cover equipped with a projection 13 having a curved surface 15 for supporting the exclusive jig 9. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a printed circuit board insertion / extraction structure in a unit device that houses a plurality of printed circuit boards on which electronic components are mounted.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a printed circuit board storage unit device that stores a plurality of printed circuit boards on which electronic components are mounted in one large unit device is well known (for example, see Patent Document 1).
[0003]
[Patent Document 1]
JP-A-6-21670
However, in such a unit device that houses a plurality of printed circuit boards on which electronic components are mounted, when the printed circuit boards are individually removed from the unit device, it is necessary to separately provide parts for an insertion / extraction mechanism such as attaching an insertion / extraction lever to the printed circuit board. was there.
[0005]
[Problems to be solved by the invention]
As described above, in the related art, it is necessary to separately provide a component for the insertion / extraction mechanism, and the number of components is large, the structure is complicated, and the cost is high.
In particular, when the unit device is formed of a resin housing, if the unit device is reduced in size, it is weak in strength to provide an insertion / extraction mechanism.
Furthermore, there is a problem that it is difficult to save space due to a large number of parts, and it has been difficult to reduce the size and cost of the unit device.
In order to solve the conventional problems, the present invention simplifies the operation of inserting and removing the printed circuit board without increasing the number of components on the printed circuit board and the unit device housing, and furthermore, reduces the size and cost of the device. It is an object of the present invention to provide a printed circuit board storage unit device.
[0006]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, an invention of a printed circuit board storage unit device according to claim 1 is a unit device for storing a plurality of printed circuit boards on which electronic components are mounted. A printed circuit board, a dedicated jig having a cylindrical protrusion for insertion into the notch, and a housing cover having a curved protrusion for supporting the dedicated jig. And
According to a second aspect of the present invention, in the printed circuit board storage unit according to the first aspect, a dedicated jig having the columnar protrusion is detachably mounted on the housing cover.
The printed circuit board removing method according to claim 3, wherein a point on the dedicated jig having the columnar projection is set as a power point, and a point moving along the curved projection surface of the housing cover is set as a fulcrum. 3. The printed circuit board according to claim 1 or 2, wherein the printed circuit board is formed using a lever lever with a contact point between a notched portion having an elongated hole shape of the printed circuit board and a cylindrical projection of the dedicated jig as an action point. The printed circuit board storage unit device.
With the above configuration, the operation of inserting and removing the printed circuit board can be simplified without increasing the number of components on the printed circuit board and the unit device housing, and the size and cost of the device can be reduced.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
In the present embodiment, in a unit device that houses a plurality of printed boards on which electronic components are mounted, five printed boards are housed in the housing of the unit device that is composed of a housing case and a housing cover made of resin. Here is an example of such a case.
FIG. 1 is an overall isometric view of a unit device showing an embodiment of the present invention.
In FIG. 1, a resin housing cover 2 is attached to a resin housing case 1, and a motherboard substrate having five electrically connected mating connectors is mounted in the housing. Yes, it is fixed to the housing case 1. Five mating boards 3 to 7 each having a mating connector with the motherboard board are fitted into the mating connectors on the motherboard board, and these printed boards are electrically connected to each other. It is housed and functions as a unit device.
The printed boards 3 and 4 are boards that cannot be inserted or removed.
Face covers 5a to 7a are individually attached to the printed circuit boards 5 to 7 on the housing cover 2, respectively, and by removing them individually, insertion and removal of each printed circuit board can be performed.
The battery 8 for retaining data of a unit device incorporated in the housing cover 2 is usually protected from the external area by attaching the detachable battery cover 9 to the housing cover 2 except when the battery is exhausted and the battery 8 is replaced. Is done. The printed circuit board is inserted into and removed from the housing using the battery cover 9.
FIG. 2A is an external perspective view of the printed circuit board 6.
It has a connector 11 for fixing to the motherboard substrate for fitting with the mating connector 25 on the motherboard substrate 11a fixed in the housing case 1 and a notch 10 in the upper part on the front side of the printed circuit board.
FIG. 2 (b) is an enlarged view of the upper portion of the printed circuit board on the front side, which has a notch with an elongated hole shape having an appropriate position and size calculated in advance.
FIG. 3A is an external perspective view of the housing cover 2, having protrusions 12, 13, and 14 on an upper portion. FIG. 3B is a side cross-sectional view of the protrusion 12. The same is true for
The projections 12, 13, and 14 have a curved surface shape 15 with a rounded tip.
4A and 4B are diagrams illustrating the battery cover 9, in which FIG. 4A is a plan view, FIG. 4B is a front view, and FIG. 4C is a side view. As can be seen from the figures, the battery cover 9 has a claw 17 and a claw 18 to be attached to the housing cover 2 and a projection 16 having a cylindrical shape.
[0008]
A method of removing the printed circuit board 6 from the housing by combining the shapes described above will be described below.
5A and 5B are views for explaining a state before the printed circuit board 6 is removed, wherein FIG. 5A is an external perspective view, FIG. 5B is a side sectional view, and FIG. 5C is a front view.
6A and 6B are views for explaining a state in which the printed circuit board 6 is being removed. FIG. 6A is an external perspective view, and FIG. 6B is a side sectional view thereof.
In FIG. 5, the solder surface 19 of the printed board 6 is positioned by the board guide projection 20 of the housing cover 2, and a certain distance space 22 exists between the solder surface 19 and the side surface 21 of the face cover 7a.
The battery cover 9 is inserted into the space 22 from obliquely above the front as shown in FIG. At this time, as shown in FIG. 6B, in a state where the cylindrical protrusion 16 of the battery cover 9 is fitted in the notch 10 of the printed circuit board 6, the battery cover 9 is tilted at an angle θ1 calculated in advance with respect to the vertical direction. Is only held tilted.
FIG. 7 shows the relationship between the housing case 1, the printed circuit board 6, and the battery cover 9. FIG. 7 is a side sectional view immediately before the removing operation.
The mating connector 11 of the printed circuit board 6 is mated with the mating connector 25 on the mother boat board 11a side fixed to the housing case 1. This state is referred to as “before operation”, and the relative position of the printed circuit board 6 with respect to the housing case 1 is defined as position 0.
From this state, the user holds the upper portion of the battery cover 9 between the fingertips 9a of the operator, and manually places the angle θ2 around the circular center 23 of the cylindrical protrusion of the battery cover 9 as a center.
Rotate until
[0009]
FIG. 8 illustrates the state after this operation.
FIG. 9 is a diagram illustrating FIGS. 7 and 8 with equivalent mechanism diagrams. (A) is a mechanism diagram before the operation corresponding to FIG. 7, and (b) is a mechanism diagram after the operation corresponding to FIG.
In FIG. 9A, reference numeral 29 denotes the case 1 and 30 denotes the curved projection 15 of the case cover 2, which are considered to be relatively fixed.
Reference numeral 31 denotes an end face of the battery cover 9, and reference numeral 32 denotes a columnar projection 16 of the battery cover 9 (FIG. 6B).
Reference numeral 33 denotes the printed circuit board 9, and reference numeral 34 denotes the cutout portion 10 of the printed circuit board 9.
Reference numeral 35 denotes wheels equivalently indicating that the printed circuit board 9 can move in the horizontal direction with respect to the housing case 1.
As can be seen from a comparison between FIG. 7 and FIG. 9 (a), the power point is a point on the dedicated jig having the columnar protrusion, that is, the portion having the battery cover 9 becomes the power point 26, and the housing cover The second curved point 27 serves as a fulcrum and fluctuates along the curved projection. The point on the cutout of the elongated hole shape of the printed board 6 becomes the action point 28, and the lever principle is configured.
The direction of the force generated at this point of action is such that the mating connector 11 of the printed circuit board 6 moves away from the mating connector 25 of the motherboard substrate 11a fixed to the housing case 1.
When the force reaches a certain level or more, the printed circuit board 6 can be removed beyond the fitting force of the connector.
In FIG. 9B equivalently to FIG. 8 showing this moment, the angle between the battery cover 9 and the vertical direction is θ2. At this time, the force point 26 has moved to the point 26a, the fulcrum 27 has moved to the point 27a, and the application point 28 has moved to 28a, and the carriage 33 equivalently representing the printed circuit board 9 is advanced by L from the original position 0. In.
Now, by making the distance between the fulcrum 26 and the fulcrum 27 much longer than the distance between the fulcrum 27 and the action point 28, the force applied to the fulcrum 26 can be made smaller than the fitting force of the connector by leverage. . The printed circuit board 9 can be easily removed from the housing case 1 and the housing cover 2 with a small force.
[0010]
Also, as shown in FIG. 10, the battery cover 9 which is a dedicated jig having a columnar projection has a structure in which the housing cover 2 can be attached to and detached from the housing cover 2 with the claws 17 and 18, so that a printed circuit board is inserted and removed. Except when the battery 8 is removed when the battery 8 is replaced as a protective cover, which is an original function, the battery is usually attached to the housing cover 2.
[0011]
【The invention's effect】
As described above, according to the present invention, in a unit device that accommodates a plurality of printed circuit boards on which electronic components are mounted, a structure in which the printed circuit board can be easily inserted and removed without increasing the number of components between the printed circuit board and the unit device housing Therefore, it is possible to reduce the size and cost of the device.
[Brief description of the drawings]
FIG. 1 is an overall isometric view of a unit device showing an embodiment of the present invention.
2A and 2B are diagrams illustrating a printed board according to the present invention, wherein FIG. 2A is an external perspective view and FIG. 2B is a partially enlarged side view of the printed board.
3A and 3B are diagrams illustrating a housing cover of the present invention, wherein FIG. 3A is an external perspective view, and FIG. 3B is a side sectional view of a protrusion.
4A and 4B are diagrams illustrating a battery cover also serving as a dedicated jig of the present invention, wherein FIG. 4A is a plan view, FIG. 4B is a front view, and FIG.
5A and 5B are diagrams illustrating a state before a printed circuit board is removed, wherein FIG. 5A is an external perspective view, FIG. 5B is a side sectional view, and FIG. 5C is a front view.
6A and 6B are views for explaining a state in which the printed circuit board 6 is being removed, and FIG. 6A is an external perspective view and FIG. 6B is a side sectional view thereof.
FIG. 7 is a side sectional view immediately before a detaching operation.
FIG. 8 is a side sectional view immediately after the detaching operation.
9A and 9B are equivalent mechanism diagrams for explaining a detaching operation of the present invention, wherein FIG. 9A is a mechanism diagram before the operation corresponding to FIG. 7 and FIG. 9B is a mechanism diagram after the operation corresponding to FIG.
FIG. 10 is an external perspective view of the unit device of the present invention in a state where a battery cover as a dedicated jig is attached.
[Explanation of symbols]
Reference Signs List 1 housing case 2 housing cover 3 printed board 4 printed board 5 printed board 5a face cover 6 printed board 7 printed board 7a face cover 8 battery 9 battery cover 9a operator's fingertip 10 notch 11 connector for fixing to motherboard board 11a Motherboard substrate 12 Projection 13 Projection 14 Projection 15 Curved surface shape 16 Cylindrical protrusion 17 Claw 18 Claw 19 Printed circuit board solder surface 20 Board guide 21 Face cover side surface 22 Space 23 Center point 24 Battery cover end surface 25 Motherboard substrate side mating connector 26 Move Previous force point 26a Force point 27 after movement Support point 27a before movement Support point 28 after movement Operation point 28a before movement Operation point 29 after movement Equivalent diagram of casing case 1 Equivalent to curved surface projection 15 of casing cover 2 Figure 31 Battery cover 9 Figure 32 wheel representing the horizontal movement of the notch 10 equivalent diagram 35 PCB equivalent diagram 34 PCB 9 of equivalent diagram 33 PCB 9 of the cylindrical shape on the projection 16 of the battery cover 9

Claims (3)

In a unit device that stores a plurality of printed circuit boards on which electronic components are mounted,
The printed circuit board having a slot-shaped open notch, a dedicated jig having a columnar projection for inserting into the notch, and a curved projection for supporting the dedicated jig. A printed circuit board storage unit device comprising: a housing cover having the printed circuit board. 2. The printed circuit board storage unit device according to claim 1, wherein a dedicated jig having the cylindrical projection is detachably mounted on the housing cover. The point on the dedicated jig having the columnar projection is set as a power point, the point moving along the curved projection surface of the housing cover is set as a fulcrum, and the open cut of the elongated hole shape of the printed board is made. 3. The printed circuit board is detached from the printed circuit board storage unit device according to claim 1 or 2, using a lever principle in which a contact portion between the notched portion and the cylindrical projection of the dedicated jig is used as an operation point. To remove printed circuit boards.

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