JP4690224B2 - Circuit board - Google Patents

Description

  The present invention relates to a circuit board in which a sub board is detachably mounted on a main board via a connector.

  There exists a thing shown to (patent document 1) as what attached the subboard | substrate via the connector on the main board | substrate.

  This is a module substrate (sub-board) 1 fixed to the main board 2 using a fixing plate 3 as shown in FIG. 4, and the fixing plate 3 is formed to cover the sub-board 1. Has been. Also, claws 4 as shown in FIG. 4 are provided at the four corners of the fixing plate 3 covering the sub-substrate 1, and spacer portions 5 for supporting the sub-substrate 1 are formed on the nails 4. ing.

The fixing plate 3 configured as described above is placed over the sub-board 1 connected to the connector 6 of the main board 2, and the claw 4 of the covered fixing board 3 is fitted into the slit 7 provided in the main board 2. At that time, the spacer portion 5 of the claw 4 is fitted between the sub-substrate 1 and the main substrate 2, and the tip of the claw 4 fitted in the slit 7 projects from the back surface of the main substrate 2 through the slit 7. Like that. Then, the sub-substrate 1 is firmly fixed to the main substrate 2 by bending the tip of the claw 4 protruding from the back surface of the main substrate 2.
Utility Model Registration No. 3108238

  However, in the above fixing method, once the sub-board is attached to the main board, it is difficult to remove it because the claws are bent. In addition, since the nail of the fixed plate that has been removed will be stretched once it has been bent, its strength will drop, and it will be a problem if it comes off due to an impact such as dropping, or the connector is damaged due to the beat removed by that impact. So there was a problem that could not be reused.

  Therefore, for example, there is a problem that it is not suitable for use on a sub-board such as an option board that can be replaced in order to change the function of the main board.

  Accordingly, an object of the present invention is to make it possible to easily attach and detach a sub-board any number of times. Next, it is made difficult to cause damage to the connector when the sub-board is removed by mounting the sub-board so that it does not come off even when subjected to an impact such as dropping.

In order to solve the above-described problems, in the present invention, a sub-board in which a connector header or socket is provided on a board, and a connector socket or header to be connected to the sub-board header or socket is provided on the board. The sub-board is formed with engaging portions on opposite sides of the square substrate, with one of the engaging portions protruding from the center of the side and the other as the center of the side. A projection formed on one side of the engaging portion of the sub-board on one side of the engaging piece formed of an elastic material that engages with the engaging portion of the sub-board facing each other. A slit for fitting the portion, and an upper portion of one of the locking pieces formed with the slit can be bent outwardly with respect to the sub-board fitted in the slit, and the finger of the sub-board can be hung. Engage with engaging part The other of the locking pieces is fitted into a recessed portion formed on the other side of the sub-board, and the other locking piece is brought into contact with the upper surface of the other side of the fitted sub-board. In this way, a configuration in which a protrusion that engages with each other is provided .

  By adopting such a configuration, the sub-board is locked to the main board by engagement with the locking piece, so that it can be easily removed by releasing the engagement. Moreover, since it can be easily locked to the main board by engaging with the locking piece, the sub-board can be attached and detached any number of times.

In addition, by adopting such a configuration, the sub-board fits one protrusion of the engaging portion into the slit of the locking piece of the main board, and the other recessed portion is fitted into the locking piece of the board, The upper surface of the other side fitted is brought into contact with the protrusion of the locking piece and locked. The attached sub-board can be easily removed any number of times by releasing one of the locking pieces of the main board by, for example, bending the engaging piece with the protruding portion of the locking piece.

Further, at this time, an insulating elastic body is formed on the main substrate in a frame shape that supports the square sub substrate, or the sub substrate is attached via an elastic member arranged to support the four corners , A configuration in which the sub-board is pushed up can be employed.

  By adopting such a configuration, the elastic member provided between the main board and the sub board does not come off by pushing up the sub board and crimping the engaging part of the sub board and the locking piece of the main board. Therefore, for example, it can be prevented from coming off by an impact such as dropping, so that the connector can be prevented from being damaged.

  According to the present invention configured as described above, the sub-board can be easily attached and detached. Further, the sub-board attached to the main board does not come off even when subjected to an impact such as dropping, so that the connector is hardly damaged.

  Hereinafter, embodiments of this embodiment will be described with reference to the drawings. As shown in FIG. 1 and FIG. 2, the circuit board of this embodiment has a sub board (option board) 1 in which the header 6a of the connector 6 is provided on the board, and a main board in which the socket 6b of the connector 6 is provided on the board. An elastic member 8 is provided between the substrate 2 and the substrate 2.

  In this embodiment, the sub-board 1 is rectangular, and the electronic component 16 is mounted on the front surface of the rectangular substrate, and the header 6a is mounted on the back surface. Further, engaging portions 9a and 9b are formed on both opposing sides (longitudinal direction) of the rectangular substrate, and one of the engaging portions 9a and 9b has a protruding portion in which the central portion of the side protrudes. 10 is formed. Further, the other 9b of the engaging portions 9a and 9b has a structure in which the central portion is recessed.

  On the other hand, the main board 2 has a structure in which locking pieces 11a and 11b that engage with the engaging portions 9a and 9b of the sub board 1 are provided on the board. In the case of this embodiment, the locking pieces 11a and 11b are substantially opposing pieces in the longitudinal direction of a rectangular frame (frame body) 11, as shown in FIG. 2, and the pieces 11a and 11b are the remaining pieces 11c. , 11d. Further, the upper portions of the pieces 11a to 11d raised from the frame 11 are separated at the four corners, and an elastic member 8 described later can be accommodated in the opening 12 formed by the pieces 11a to 11d.

  In this embodiment, the frame 11 is obtained by applying Ni plating to a stainless material. However, the present invention is not limited to this, and any metal other than resin or stainless steel can be used as long as it has a required strength and elasticity. May be formed.

  A slit 13a is formed in one of the locking pieces 11a and 11b, and a protrusion 10 formed on one of the engaging portions 9a (one) of the sub-board 1 is fitted into the slit 13a. Specifically, the slit 13a is provided, and the upper portion of the slit 13a is slightly bent so that the locking piece 11a of the frame 11 is bent outward. The upper side of the slit 13a bent outward is to assist the introduction of the protrusion (engagement portion) 10 of the sub-board 1 into the slit 13a when the sub-board 1 is attached, and when the sub-board 1 is removed. Can be bent outward by putting a finger on the part.

  Further, the other 11b of the locking pieces 11a and 11b is dimensioned so as to be fitted to the recessed portion of the engaging portion 9b of the sub-board 1. Specifically, the upper portion of the locking piece 11b is formed to match the recessed portion of the sub-substrate 1. In addition, a slit 13b is provided in the locking piece 11b, and a projection 14 is formed by bending the upper part of the slit 13b so that the central portion protrudes to the inside of the frame 11, and is fitted to the locking piece 11b. The sub-board 1 is in contact with the engaging portion 9b (upper surface) as a presser.

  Since the protrusions are provided by using the slits in this way, both the locking pieces 11a and 11b can be dealt with only by bending if the same slit processing is performed, which is efficient.

  As the elastic member 8, for example, an elastic body having good insulation such as sponge rubber, rubber, or sponge is formed in a frame shape as shown in FIG. 1 so that it can be accommodated in the inner periphery of the frame 11. Is. The thickness of the elastic member 8 is determined as appropriate by, for example, making it a thickness that can be supported when the sub-board 1 is attached, and making a prototype with a thickness that can generate a slight upward pressure suppression on the attached sub-board 1. That's fine.

  In this embodiment, the elastic member 8 has a frame shape. However, the elastic member 8 is not limited to this. For example, the elastic member 8 may be provided at the four corners of the frame 11 as long as necessary elastic pressure can be obtained. May be good.

  This embodiment is configured as described above. Next, a method for attaching the sub board 1 to the main board 2 will be described.

  First, when the sub-board 1 is attached to the main board 2, the elastic member 8 is attached in the frame 11, and as shown in FIG. It pushes into the slit 13b so that the lower part of the protrusion 14 of the latching piece 11b may be contact | connected.

  That is, the engaging portion 9b is pushed in between the protruding portion 14 and the elastic member 8 to be fitted into the locking piece 11b, and the upper surface of the protruding portion 14 is hooked. In this state, while rotating the sub-board 1 as indicated by an arrow about the point where the protrusion 14 and the engaging portion 9b are in contact with each other, the engaging portion 9a formed with the protrusion 10 of the sub-board 1 is moved. The frame 11 is brought into contact with and pushed into the locking piece 11a. Then, the locking piece 11a of the frame 11 is pushed outward and spreads, so that the protrusion 10 of the sub-board 1 fits into the slit 13a of the locking piece 11a as shown in FIG. At the same time, the header 6 a of the sub-board 1 of the connector 6 is fitted into the socket 6 b of the main board 2. Further, when the protruding portion 10 of the sub-board 1 is thus fitted into the slit 13a of the locking piece 11a of the frame 11, the warped locking piece 11a returns to its original state, so that the sub-board 1 cannot be detached. At this time, since the sub-board 1 is pushed up by the repulsive force of the elastic member 8 reduced by the pressing, the engaging portions 9a and 9b of the sub-board 1 are formed by the protrusions 14 of the engaging pieces 11a and 11b and the slits 13 respectively. Pressed to the top and completely fixed. Therefore, for example, even if the circuit board receives an impact caused by dropping, the sub-board 1 does not come off. Moreover, since it does not come off even if it receives an impact, the connector 6 connecting both the boards 1 and 2 is not damaged.

  By the way, both ends 15 of the engaging portions 9a and 9b on which the protruding portion 10 of the sub-board 1 is formed protrude as shown in FIG. 2 and are fitted with notches provided on the left and right of the locking pieces 11a and 11b of the frame 11. Therefore, the sub-boards 1 and 2 are prevented from being twisted due to their engagement.

  On the other hand, as shown in FIG. 3B, when the sub-board 1 attached to the main board 2 is removed, a finger is applied to the warped upper portion of the locking piece 11a of the frame 11 in which the slit 13a is formed, and the board is bent outward. When the protrusion 10 of the sub-board 1 is removed from the slit 13a, the sub-board 1 is automatically removed by being pushed by the elastic member 8 in the direction opposite to the arrow in FIG. Can be easily removed by pulling out and releasing the engagement between the other locking piece 11b and the protrusion 14 of the locking piece 11b. In this way, it can be easily removed.

  In this embodiment, the header 6a is provided on the sub-board 1 and the socket 6b is provided on the main board 2. However, the present invention is not limited to this. The same applies to the sub board 1 provided with the socket 6b and the main board 2 provided with the header 6a.

  Thus, since this circuit board has a simple structure and sufficient strength, it can be applied to a circuit board having a structure in which the sub board is detachably attached to the main board via the connector.

Perspective view of an embodiment 1 is an exploded perspective view of FIG. (A) Action explanatory diagram of the embodiment, (b) Action explanatory diagram of the embodiment Action explanatory diagram of conventional example

Explanation of symbols

1 Sub-board 2 Main board 6 Connector 6a Header 6b Socket 8 Elastic member 9a Engagement part 9b Engagement part 10 Protrusion part 11a Engagement piece 11b Engagement piece 13a Slit 13b Slit 14 Projection

Claims (2)

Header connector (6) on a substrate (6a) or the socket (6b) and the provided a sub-substrate (1), the header of the sub-substrate (1) (6a) or the socket (6b) and connected to a connector (6) A main board (2) provided with a socket (6b) or header (6a) on the board,
The sub-board (1) has engaging portions (9a, 9b) formed on opposite sides of the square substrate, and one of the engaging portions (9a, 9b) (9a) protrudes from the center of the side. The other side (9b) is recessed in the center of the side,
On the main board (2) , one of the locking pieces (11a, 11b) (11a) formed of an elastic material that engages with the opposing engaging portions (9a, 9b) of the sub board (1) , A slit (13a) for fitting the projection (10) formed on one (9a) of the engaging portion (9a, 9b) of the sub-board (1) is formed, and one of the members that forms the slit (13a). The upper part of the stopper (11a) is bent outwardly with respect to the sub-board (1) fitted in the slit (13a) so that the finger can be hooked, and the engaging portion (9a) of the sub-board (1) 9b) is engaged with the other part (11b) of the locking pieces (11a, 11b) engaged with the recessed portion formed on the other side of the sub-board (1), and A protrusion that abuts and engages with the upper surface of the other side of the sub-board (1) fitted to the stopper (11b). A circuit board having a 14). An insulating elastic body is formed on the main substrate (2) in a frame shape that supports the rectangular sub-substrate (1), or via an elastic member (8) arranged to support the four corners. The circuit board according to claim 1, wherein the sub-board (1) is attached and the sub-board (1) is pushed up .

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