JP4051802B2 - Substrate holding device for control equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a substrate holding device for a control device such as an electronic control device in which a substrate on which a plurality of electronic components are mounted is housed in a case.
[0002]
[Prior art]
Conventionally, as prior art documents related to a substrate holding device of a control device, those disclosed in Japanese Patent No. 2791295 and Japanese Utility Model Laid-Open No. 5-93092 are known. The former has a fitting slit on both sides of the case, a small semi-cylindrical protrusion on the back side, and a trapezoidal protrusion on the lid, which shows the technology to hold the substrate in the case without rattling. Has been. In the latter, a technique is shown in which both end surfaces of the substrate are clamped by a clamping member which is a separate part having elasticity, and the substrate is held in the case without rattling.
[0003]
[Problems to be solved by the invention]
By the way, in the above-mentioned thing, in order to hold | maintain the board | substrate from which a depth dimension differs in a case, since the case for exclusive use corresponding to each board | substrate, an exclusive clamping member, etc. are needed, it is a control apparatus of high-mix low-volume production In that case, there was a defect that led to a significant cost increase.
[0004]
Accordingly, the present invention has been made to solve such a problem, and it is an object of the present invention to provide a substrate holding device for a control device capable of accommodating a plurality of substrates having different substrate sizes and accommodating the substrate in a case without rattling. It is said.
[0005]
[Means for Solving the Problems]
According to the substrate holding device of the control device according to claim 1, the dimension in the width direction of the substrate is sequentially increased toward the back side in the groove of the pair of rail-like support portions of the case corresponding to the depth dimension of the plurality of substrates. A plurality of stopper portions narrowed in a step shape are formed. And the board | substrate is formed in the external shape corresponding to the support part and stopper part of a case. As described above, in a case where a plurality of stopper portions are formed in the groove of the rail-like support portion, a plurality of substrates having different substrate sizes (depth dimensions) can be appropriately inserted and accommodated. That is, by sharing a case with a plurality of substrates, it is possible to reduce the cost in the high-mix low-volume production.
[0006]
In the substrate holding device of the control device according to claim 2, the stopper portion is formed in a taper shape so as to have a substantially plate thickness dimension on the back side when the substrate is in the assembly completion state immediately before completion of insertion into the case. The insertion tip of the substrate and the right and left peripheral surfaces in the middle are sandwiched in the thickness direction. Thereby, a board | substrate can be reliably accommodated in a case without shakiness, and the reliability with respect to the vibration etc. of a control apparatus can be improved.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples.
[0008]
FIG. 1 is a perspective perspective view showing the entire configuration of a substrate holding device of a control device according to an example of an embodiment of the present invention. FIG. 2 is a partial cross-sectional perspective view showing the main configuration of FIG. In FIG. 1, wiring patterns formed on a printed circuit board, mounted electronic components, and the like are omitted.
[0009]
1 and 2, the electronic control device 10 has a substantially rectangular parallelepiped shape made of plastic resin and a bag structure case 11. A wiring pattern is formed on the electronic control device 10, and a connector member 17 for electrically connecting to an electronic component or an external device. Is mounted. A cover 18 is fitted to the opening 11 a side of the case 11, and a connection terminal side of the connector member 17 with a mating connector (not shown) faces the outside of the case 11 from the connector square hole 18 a of the cover 18. It is in a state.
[0010]
Here, a pair of support rails 12 are formed on the left and right inner wall surfaces of the case 11. The support interval in the width direction of the printed circuit board 15 by the support rail 12 is set to be slightly larger than the width dimension including the tolerance of the printed circuit board 15. In addition, stoppers 13a and 13b are formed by sequentially narrowing the dimension in the width direction of the printed circuit board 15 in the groove of the support rail 12 in a stepwise manner. That is, the stopper portions 13a and 13b have contact positions corresponding to a printed board 15 having a long depth dimension and a printed board 15 'having a short depth dimension, which will be described later. The stopper portions 13a and 13b are gradually tapered in the thickness direction in the insertion direction of the printed circuit board 15, and are formed in a taper shape so as to have a substantially thickness dimension on the back side where the printed circuit board 15 comes into contact. . In the present embodiment, the accommodation structure is adapted to two types of substrates having different depth dimensions, but by increasing the number of stopper portions, it is possible to cope with various substrate sizes.
[0011]
The outer shape of the printed circuit board 15 is formed so as to be in contact with the inner side of the stopper portions 13 a and 13 b while being along the groove of the support rail 12 of the case 11. After the printed circuit board 15 is inserted from the opening 11a side of the case 11 and the cover 18 is fitted, the front side end surface in the insertion direction of the printed circuit board 15 faces the stopper 18 against the stopper portions 13a and 13b. It is held by the formed holding portion 19 having a substantially V-groove shape.
[0012]
In the electronic control device 10 configured as described above, the printed circuit board 15 is inserted along the pair of support rails 12 of the case 11, and when the insertion is completed, the insertion tip and the right and left peripheral edges are on the support rail 12 of the case 11. Are abutted and accommodated in the stopper portions 13a and 13b in the grooves. Here, since the back side of the stopper portions 13a and 13b is formed in a tapered shape so as to have a substantially plate thickness dimension, the insertion tip of the printed circuit board 15 and the right and left peripheral peripheral surfaces are sandwiched and securely held without rattling. Will be. At this time, the left and right peripheral surfaces of the printed board 15 are supported by the support rail 12, and the insertion tip and the right and left peripheral surfaces in the middle are simply held and fixed in the thickness direction by the stopper portions 13a and 13b. . Therefore, the wiring pattern forming portion of the printed circuit board 15 closer to the center from the support rail 12 and the mounting portion of the electronic component or the like are not adversely affected.
[0013]
Next, the operation of the present embodiment will be described in more detail with reference to FIGS. Here, FIG. 3A and FIG. 3B are a longitudinal sectional view and a transverse sectional view showing a completed state of insertion of the printed board 15 having a long depth with respect to the case 11 of the electronic control device 10. FIGS. 4A and 4B are a longitudinal sectional view and a transverse sectional view showing a completed state of insertion of the printed circuit board 15 ′ having a short depth with respect to the case 11 of the electronic control device 10.
[0014]
In FIG. 3, as described above, a wiring pattern (not shown) is formed along the support rail 12 formed in the case 11 of the electronic control device 10, and the printed circuit board 15 on which the electronic component 16 is mounted is inserted. Immediately before the insertion is completed, the printed circuit board 15 is gradually sandwiched by the tapered stopper portions 13a and 13b in the groove of the support rail 12 of the case 11 at the insertion tip and the right and left peripheral surfaces. Therefore, in the assembled state where the printed circuit board 15 is accommodated in the case 11, the left and right peripheral surfaces of the printed circuit board 15 are supported by the support rails 12, and the insertion tip of the printed circuit board 15 and the left and right peripheral surfaces in the middle are The stopper portions 13a and 13b are held and fixed.
[0015]
Here, the groove width of the support rail 12 of the case 11 with respect to the thickness of the printed circuit board 15 is originally provided for insertion and assembly, and there is a gap between the printed circuit board 15 and the support rail 12. Will be. Therefore, if vibration or the like occurs in the electronic control device 10 due to some factor, abnormal noise is generated due to contact between the printed circuit board 15 and the support rail 12. This phenomenon becomes more prominent as the substrate size increases.
[0016]
In order to cope with this, the printed circuit board 15 is sandwiched at four locations of stopper portions 13 a and 13 b formed on the support rail 12 of the case 11. That is, the printed circuit board 15 is held and fixed at the insertion tip and at the right and left peripheral surfaces in the middle, and since there are many fixing points, more stable fixing is ensured.
[0017]
Next, a case where a printed circuit board 15 ′ having a short depth dimension is used in place of the printed circuit board 15 having a long depth dimension with respect to the case 11 of the electronic control device 10 will be described with reference to FIG. 4.
[0018]
In FIG. 4, a wiring pattern (not shown) is formed along the support rail 12 formed on the case 11 of the electronic control device 10 as described above, and the printed circuit board 15 ′ on which the electronic component 16 is mounted is inserted. Immediately before the insertion is completed, the printed circuit board 15 ′ is sandwiched between the right and left peripheral surfaces of the insertion tip by a tapered stopper portion 13 b in the groove of the support rail 12 of the case 11. Therefore, in the assembled state where the printed circuit board 15 ′ is accommodated in the case 11, the left and right peripheral surfaces of the printed circuit board 15 ′ are supported by the support rails 12, and the left and right peripheral surfaces at the insertion tip of the printed circuit board 15 ′. Is held and fixed by the stopper portion 13b.
[0019]
As described above, there is a gap between the printed circuit board 15 ′ and the support rail 12. If vibration or the like occurs in the electronic control device 10 for some reason, abnormal noise is generated due to contact between the printed circuit board 15 ′ and the support rail 12. Will occur. Here, the printed circuit board 15 ′ sandwiches the left and right peripheral surfaces of the insertion tip at two locations of the stopper portion 13 b formed on the support rail 12 of the case 11. Therefore, although the printed board 15 'has fewer sandwiched portions than the printed board 15 described above, since the depth dimension is short, stable fixation is ensured only by being held and fixed at the left and right peripheral surfaces of the insertion tip.
[0020]
As described above, the substrate holding device of the electronic control device 10 according to the present embodiment includes a printed circuit board 15 (15 ′) on which a plurality of electronic components 16 are mounted and a bag structure that accommodates the printed circuit board 15 (15 ′). The case 11 has a pair of rail-like support portions that support the front and back surfaces of the printed circuit board 15 (15 ′) on both side surfaces in the insertion direction of the printed circuit board 15 (15 ′) on the inner wall surface thereof. A plurality of stopper portions 13a and 13b are formed in which the dimensions in the width direction of the printed circuit board 15 (15 ') are sequentially narrowed in the groove in the support rail 12 toward the inner side in the groove. 15 (15 ') is formed with an outer shape corresponding to the support rail 12 and the stopper portions 13a and 13b of the case 11.
[0021]
In other words, corresponding to the depth dimension of the two types (plurality) of printed circuit boards 15 (15 ′), the width of the printed circuit board 15 (15 ′) is increased toward the back side in the grooves of the pair of support rails 12 of the case 11. A plurality of stopper portions 13a and 13b whose dimensions are sequentially narrowed in a step shape are formed. A printed circuit board 15 (15 ') is formed in an outer shape corresponding to the support rail 12 and the stopper portions 13a and 13b of the case 11. As described above, in the case 11 in which the plurality of stopper portions 13a and 13b are formed in the groove of the support rail 12, two types of printed circuit boards 15 (15 ′) having different board sizes (depth dimensions) are appropriately used. Can be inserted and housed. That is, since the case 11 is made common to the two types of printed circuit boards 15 (15 ′), it is possible to reduce the cost in high-mix low-volume production. The left and right peripheral surfaces of the printed circuit board 15 (15 ′) supported by the support rail 12 of the case 11 and positioned in contact with the stopper portions 13a and 13b in the grooves of the support rail 12 are originally formed with wiring patterns. For this reason, it is not necessary to increase the board area.
[0022]
Further, in the substrate holding device of the electronic control device 10 of the present embodiment, the stopper portions 13a and 13b are gradually narrowed in the plate thickness direction in the insertion direction of the printed circuit board 15 (15 ') and become substantially plate thickness dimensions on the back side. It is formed in a tapered shape. That is, when the printed circuit board 15 (15 ') is assembled into the case 11 just before the insertion is completed, the stopper portions 13a and 13b are tapered so as to have a substantially plate thickness dimension on the back side. The insertion tip of the printed circuit board 15 (15 ′) and the right and left peripheral surfaces in the middle are sandwiched in the thickness direction. As a result, the printed circuit board 15 (15 ′) can be reliably and stably accommodated in the case 11 without rattling, and the reliability of the electronic control device 10 against vibrations and the like can be improved.
[0023]
By the way, in the said Example, although the case 11 made from a plastic resin is used, when implementing this invention, it is not limited to this, Even if it is a metal case made from aluminum die casting etc., it is the same. It is possible to configure.
[Brief description of the drawings]
FIG. 1 is a perspective perspective view showing an overall configuration of a substrate holding device of a control device according to an example of an embodiment of the present invention.
FIG. 2 is a partial cross-sectional perspective view showing the main configuration of FIG.
FIG. 3 is a cross-sectional view showing a state in which a printed circuit board having a long depth dimension is accommodated in a case in the substrate holding device of the control device according to an example of the embodiment of the present invention;
FIG. 4 is a cross-sectional view showing a state in which a printed board having a short depth dimension is accommodated in a case in the board holding device of the control device according to an example of the embodiment of the present invention;
[Explanation of symbols]
10 Electronic control device 11 Case 12 Support rail (rail-shaped support part)
13a, 13b Stopper portion 15, 15 'Printed circuit board 16 Electronic component

Claims (2)

A substrate on which a plurality of electronic components are mounted;
A case having a bag structure for accommodating the substrate;
The case has a pair of rail-shaped support portions that support the front and back surfaces of the substrate on both side surfaces in the insertion direction of the substrate on its inner wall surface, and the width of the substrate toward the back side in the groove of the support portion A plurality of stoppers are formed, the dimensions of which are narrowed in a stepwise manner, with respect to the direction.
A substrate holding device for a control device, wherein an outer shape corresponding to the support portion and the stopper portion of the case is formed on the substrate. 2. The control device according to claim 1, wherein the stopper portion is formed in a tapered shape so as to be gradually narrowed in the thickness direction in the insertion direction of the substrate and to have a substantially thickness dimension on the back side. Substrate holding device.

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