JPH0739275Y2 - Electronic device structure - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention attaches and detaches a large number of printed wiring boards to a mother board arranged inside an electronic equipment casing such as a computer main body, a private branch exchange (PBX), a main unit of a button telephone device, etc. The present invention relates to an electronic device structure that is freely connected.

[0002]

2. Description of the Related Art As is well known, in computer main bodies, PBXs, main units of button telephones, etc., for example, a mother board on which main functional elements for controlling the entire system and an external station line are mounted, terminal devices, A large number of printed wiring boards equipped with individual functional elements for controlling individual button telephones are incorporated into the inside of the housing.
The structure is as shown in.

That is, FIG. 6 is a perspective view of the inside of the main unit of a conventional button telephone system, in which a mother board A on which main functional elements for controlling an external station line are mounted is a pair of support frames fixed to a chassis B. It is arranged in a substantially vertical state with respect to C ₁ and C ₂ . Further, a large number of resin guide rails D having a predetermined length in a direction perpendicular to the motherboard A are fixed to the surface of the chassis B. Then, a large number of printed wiring boards E supported by these guide rails D are arranged side by side in the horizontal direction.

Further, in order to prevent each printed wiring board E from coming off due to vibration or the like, the front surface of each printed wiring board E is pressed by a resin fixing metal fitting G fixed to the case body by a mounting screw H, and each printed wiring board E The terminal J ₁ of the ground wire J connected to the chassis B is fixed to a proper position of E by a tightening screw K, and the individual telephones are controlled by these individual functional elements mounted on the printed wiring board E. In FIG. 6, reference numeral "F" is a connector that electrically connects the mother board A and each printed wiring board E.

[0005]

By the way, in the recent telephone equipment (telephone system) or the like, the internal equipment of the main unit is installed in accordance with an increase in the number of office lines used or an increase in the number or functions of key telephones. The number of printed wiring boards E to be incorporated tends to increase. Therefore, in the main device having the above-described structure, when the desired printed wiring board E is pulled out for maintenance or the like, or
When exchanging the printed wiring board E, it is necessary to remove the fixing bracket G each time and also to remove the terminal J ₁ of the ground wire J from each printed wiring board E. Therefore, only the desired printed wiring board E cannot be attached or removed. There is a problem that the work of attaching and detaching the wiring board E is extremely troublesome.

The object of the present invention was made in view of the above-mentioned problems of the conventional structure, and a contact for contacting with a ground metal fitting of a printed wiring board in a guide groove on one side of a board holder for supporting each printed wiring board. To obtain an electronic device structure in which these contacts are electrically connected to a ground conductor arranged outside the substrate holder.

[0007]

In order to achieve this object, the present invention has a mother board arranged in a substantially vertical direction inside an electronic equipment casing, and has a large number of boards arranged in a substantially horizontal state with respect to the mother board. In the electronic equipment structure in which the printed wiring boards of (1) and (2) are vertically adjacent to each other and the mother board and the printed wiring board are connected by a connector, a ground metal fitting is provided on one side of the front end of the printed wiring board. In the guide groove on one side of the substrate holder that fixes and supports these printed wiring boards, a contact having an elastic contact portion that comes into contact with the ground metal fitting is arranged, and on the outside of the one-sided support frame that supports the substrate holder. A ground conductor that comes into contact with the contact is provided.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described below with reference to FIGS. The illustrated embodiment is an embodiment in which the present invention is applied to a main device of a button telephone device. As shown in FIG. 1 in which a front side plate is removed, the main device is a power transformer or a power generator that generates heat. A power supply unit housing 1 that accommodates transistors and the like is provided.

A pair of vertical support frames 2L, which oppose each other in the left-right direction, are provided on the upper portion of the power supply unit casing 1.
2R is fixed, and a wiring housing 3 for accommodating external connections and internal wirings is arranged above these support frames 2L, 2R. The mother board 4 shown in FIG. 4 is fixed between the rear side portions of the support frames 2L and 2R with a fixing screw (not shown) or the like in a vertical state. Of course, the motherboard 4 is equipped with main functional elements that control the entire system and the external office line.

As shown in FIGS. 2 and 4, a plurality of pairs of substrate holders 5L and 5R facing each other in the left-right direction are vertically aligned on the respective facing surfaces of the supporting frames 2L and 2R, and the mounting screws 6 are provided. Fixed by. Also, as shown in FIG.
These resin-molded substrate holders 5L and 5R are provided with a plurality of horizontal guide grooves 5a for receiving the left and right ends of the printed wiring board 7 electrically connected to the mother board 4.
Are provided on the opposing surfaces, and therefore, when the left and right ends of the printed wiring board 7 are received in these guide grooves 5a, the horizontally extending printed wiring boards 7 are aligned in the vertical direction. .

As shown in FIG. 4, on the surface of the mother board 4, a large number of connector sockets 8 arranged in the vertical direction corresponding to the vertical arrangement pitch of the guide grooves 5a are fixed. The connector plugs 9 which can be engaged with the corresponding connector sockets 8 are fixed to the rear end portions of the respective printed wiring boards 7 corresponding to the connector sockets 8 of FIG.

As shown in FIG. 3, each substrate holder 5L, 5
Stoppers 5b for preventing careless removal of the printed wiring board 7 due to vibration or the like are integrally formed at the front end portion of the R guide groove 5a, and the front end of each printed wiring board 7 corresponding to these stoppers 5b is formed. Elastic lock claws 10 are fixed to the left and right sides of the part. That is, the lock claws 10 cantileveredly supported by the printed wiring boards 7.
As shown in FIG. 5, it is provided with a protrusion 10a that can be engaged with the corresponding stopper 5b and a handle portion 10b that can be gripped with a fingertip.

In order to stabilize the voltage of each printed wiring board 7, a contactor 11 in which a fixing leg portion 11a and an elastic contact portion 11b are integrally formed is arranged in the guide groove 5a of the left substrate holder 5L. The contact between these contacts 11 and the ground metal fitting 12 of the printed wiring board 7 allows electrical conduction to the ground conductor 13. That is, the insertion groove 5c is formed in the upper and lower portions of the left side substrate holder 5L on the front end side, and the window portion 5d is formed in the vicinity of the inlet side of each guide groove 5a, and the left end of the front end portion of the printed wiring board 7 is The "U" -shaped ground metal fittings 12 serving as the ground of each printed wiring board 7 are fixed.

By inserting the fixing leg portion 11a of the contact 11 into the insertion groove 5c formed in the left side substrate holder 5L, each printed wiring can be obtained from the window portion 5d formed in the vicinity of the inlet side of each guide groove 5a. The elastic contact portion 11a of the contactor 11 fixed to the substrate holder 5L is projected toward the ground metal fitting 12 of the substrate 7. Moreover, these contacts 11 are
Since each printed wiring board 7 is pressed into contact with the vertical ground conductor 13 arranged outside the left side support frame 2L described above, each printed wiring board 7 is connected to the ground wiring 14 via the ground metal fitting 12, the contact 11, and the ground conductor 13. It will be conducted.

Since the illustrated embodiment has the above-described structure, the number of external office lines increases, the number of terminal button telephones increases, the printed wiring board 7 is replaced, or desired printing is performed for maintenance or the like. Unlike the conventional structure, when the wiring board 7 is pulled out, it is not necessary to remove the fixing bracket each time, and the work of attaching and detaching the printed wiring board 7 is extremely easy. That is, in order to remove the desired printed wiring board 7 from the mother board 4, the handle portion of the lock claw 10
When the printed wiring board 7 is pushed forward by pushing down 10b, the protrusion 10a of the lock claw 10 comes off the stoppers 5b of the substrate holders 5L and 5R. Therefore, simply grasp the handle portion 10b and pull it toward you to obtain the desired print. The wiring board 7 can be removed.

To connect the printed wiring board 7 to the mother board 4, the left and right ends of the printed wiring board 7 are inserted into the guide grooves 5a of the board holders 5L and 5R, and the printed wiring board 7 is oriented in the direction of the mother board 4. Just push
The connector plug 8 of the printed wiring board 7 is engaged with the connector socket 8 of the mother board 4, and the lock claw 10 of the printed wiring board 7 is engaged with the stopper 5b, so that the printed wiring board 7 is prevented from being unintentionally pulled out.

In the above embodiment, an example in which the present invention is applied to the main unit of the button telephone device has been described.
Needless to say, the present invention is not limited to this example and can be applied to other electronic devices.

[0018]

As is apparent from the above description, according to the present invention, when the printed wiring board is replaced or the desired printed wiring board is pulled out for maintenance or the like, the handle portion of the lock claw is pushed down. When the printed wiring board is pulled towards you, the protrusion of the lock claw will come off the stopper of the board holder, so you can remove the desired printed wiring board by simply grasping the handle and pulling it toward you. The work of attaching and detaching the wiring board is easy. Further, a ground metal fitting fixed to one side of the front end portion of the printed wiring board, a contact arranged in a guide groove on one side of a substrate holder supporting each printed wiring board, and an outside of a one-sided support frame supporting the substrate holder. Since it is electrically connected to the arranged ground conductor, it is not necessary to remove the ground wire terminal from each printed wiring board when exchanging any printed wiring board, and only the desired printed wiring board is attached or removed. Therefore, the work of attaching and detaching the printed wiring board is extremely easy.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of a main unit of a key telephone device according to the present invention, showing a front plate removed.

FIG. 2 is a vertical sectional view of the main device.

FIG. 3 is an enlarged perspective view of a main portion around a front end portion of a printed wiring board used in the main device.

FIG. 4 is an enlarged exploded perspective view of a main part around a motherboard used in the main device.

FIG. 5 is a perspective view of a substrate holder used in the main device.

FIG. 6 is a schematic perspective view of a conventional electronic device.

[Explanation of symbols]

 1 Power Supply Case 2L, 2R Support Frame 3 Wiring Case 4 Motherboard 5L, 5R Board Holder 5a Guide Groove 7 Printed Wiring Board 8 Connector / Socket 9 Connector / Plug 11 Contactor 12 Ground Metal 13 Ground Conductor 14 Ground Wiring

Claims (1)

[Scope of utility model registration request] 1. A mother board is arranged in a substantially vertical direction inside an electronic equipment casing, and a large number of printed wiring boards oriented substantially horizontally with respect to the mother board are arranged side by side in the vertical direction. An electronic device structure in which a mother board and the printed wiring board are connected by a connector, wherein a ground metal fitting is fixed to one side of a front end portion of the printed wiring board, and one side of a substrate holder that supports these printed wiring boards. A contact having an elastic contact portion that comes into contact with the ground fitting is arranged in the guide groove of, and a ground conductor that comes into contact with the contact is arranged outside the one-sided support frame that supports the substrate holder. Characteristic electronic device structure.