Brackets for electronic control components

Abstract

To provide a bracket for an electronic control component which is unlikely to generate high acceleration (high-speed vibration).SOLUTION: A bracket for an electronic control component 1 includes a bottom portion 3 provided with a plurality of elastic pieces 3A that push up the lower surface of the electronic control component, and an abutting stop portion 5 that abuts against the pushed-up electronic control component from above. The plurality of elastic pieces 3A are provided such that the amplitude of at least one elastic piece 3A1 is made larger than that of the other elastic piece 3A2 when vertical vibration is applied in a state where the electronic control component is assembled.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a bracket for an electronic control part, for mounting an electronic control part such as an ECU to a vehicle body. [Background technology]

[0002] For example, an ECU (Electronic Control Unit) of a vehicle includes a circuit board in a housing (ECU case) and is attached to a panel member on the vehicle body side by a bracket (Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2006-220171 A Summary of the Invention [Problem to be solved by the invention]

[0004] These brackets use the pressure of the elastic pieces to absorb the vibrations caused by the vehicle while it is running, and function to suppress the acceleration (vibration frequency) applied to the ECU by the vibrations. This prevents poor contact of the connectors of electronic control components. However, even when the acceleration (vibration frequency) is suppressed, there is a possibility that the acceleration may become high in a certain frequency band.

[0005] An object of the present invention is to provide a bracket for an electronic control component that is less susceptible to high acceleration (high-speed vibration).

[0006] As an example of a bracket for electronic control components that solves the above problem, A bracket for an electronic control component for mounting an electronic control component to a vehicle body, a bottom portion provided with a plurality of elastic pieces arranged on a lower surface side of the electronic control component and pushing up the lower surface; a stopper portion that abuts against the electronic control component from above; When vibration is applied to the electronic control component in an assembled state in which the electronic control component is clamped between the elastic piece and the abutment stopper portion, one or both of the amplitude and vibration period in the vertical direction of one elastic piece may be set to be different from those of at least another elastic piece.

[0007] In the electronic control component of the present invention, the side pressed against the elastic piece when the electronic control component bracket is assembled is defined as the bottom side (lower side), and the side abutted against the abutment stopper is defined as the upper side.

[0008] According to the conventional configuration, in order to reduce the acceleration (vibration) of the electronic control component, multiple elastic pieces are provided as stabilizers on the bracket for the electronic control component, and the electronic control component is held in a pressed state. However, since all of the elastic pieces have the same shape and the same pressing reaction force, and press the electronic control component in a balanced manner, the good balance actually matches the frequency bands in which the acceleration (vibration frequency) of each elastic piece increases, and the acceleration in the matched frequency bands is made higher. According to the above configuration, the amplitude and vibration period of at least one of the multiple elastic pieces are set to be different from the others. In other words, the balance of the support of the electronic control component by the multiple elastic pieces is intentionally disrupted. As a result, the acceleration does not increase in a specific frequency band by resonating with each elastic piece. In other words, the peak of the acceleration in each elastic piece is dispersed, and the peak can be lowered.

[0009] The plurality of elastic pieces can be arranged so that the pressing reaction force pressing the lower surface of at least one elastic piece is larger than that of the other elastic pieces. According to this configuration, the frequency bands in which acceleration increases are dispersed in the individual elastic pieces, so that very large acceleration does not occur in a specific frequency band. Specifically, among the plurality of elastic pieces, at least one elastic piece is arranged so that one or more of the plate thickness, plate width, plate length, and shape are different from those of the other elastic pieces, so that the magnitude of the pressing reaction force can be made different.

[0010] The electronic control component bracket of the present invention, which solves the above problems, is as follows: A bracket for an electronic control component for mounting an electronic control component to a vehicle body, a bottom portion provided with a plurality of elastic pieces arranged on a lower surface side of the electronic control component and pushing up the lower surface; a plurality of abutment stoppers arranged in a plan view so as to abut from above the electronic control component being pushed up; the plurality of elastic pieces are distributed such that each pressing position at which the lower surface is pressed does not have at least rotational symmetry among rotational symmetry and line symmetry within the lower surface so as to disrupt the support balance of the electronic control component; The plurality of elastic pieces are disposed at the bottom in a plan view. Above The peripheral portion of the through hole formed below is the base end side, and the plate extends obliquely upward in a cantilever manner above the through hole toward the center of the bottom portion, with the tip being a free end and having a shape that can be elastically deformed in the vertical direction, and the plate thickness, plate width, plate length and shape are all the same, The electronic control component is clamped and assembled by the plurality of cantilever-shaped elastic pieces and the plurality of abutment stoppers, which are arranged corresponding to each other in a plan view. According to this, even if the width, thickness, length, and shape of the multiple elastic pieces are all the same, a support form for the electronic control component that generates undulations due to imbalance in the pressing positions is formed. Therefore, when vibration is applied to the electronic control component, differences are generated in the pressing reaction force and amplitude of each elastic piece, and it is possible to reduce the high acceleration caused by resonance that can occur at a specific frequency. [Brief description of the drawings]

[0011] [Figure 1] FIG. 2 is a perspective view showing a state in which the ECU is attached to the ECU bracket. [Diagram 2] Plan view of Figure 1. [Diagram 3] Front view of Figure 1. [Figure 4]FIG. 2 is a perspective view of the ECU bracket of FIG. 1 . [Diagram 5] Plan view of Figure 4. [Figure 6] Front view of Figure 4. [Figure 7] FIG. 2 is a plan view of a conventional ECU bracket. [Figure 8] 1 is an explanatory diagram showing the acceleration of an ECU in each frequency band when an ECU is attached to a conventional ECU bracket and subjected to vibration. [Figure 9] 4 is an explanatory diagram showing the acceleration of an ECU in each frequency band when an ECU is attached to an ECU bracket and vibration is applied. FIG. [Figure 10] FIG. 2 is an enlarged view showing a first modified example of the ECU bracket in FIG. [Figure 11] FIG. 2 is an enlarged view showing a second modified example of the ECU bracket of FIG. [Figure 12] FIG. 2 is an enlarged view showing a third modified example of the ECU bracket in FIG. [Figure 13] FIG. 2 is an enlarged view showing a fourth modified example of the ECU bracket of FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0012] A reference example of the present invention will be described with reference to the drawings.

[0013] 1 to 3, the bracket 1 for an electronic control component of this embodiment includes first and second engagement portions 2, 6 (engagement portions: see FIG. 3) for mounting an electronic control component 10 to a vehicle body, a bottom portion 3 provided with a plurality of elastic pieces 3A disposed on the underside 10b of the electronic control component 10 and pushing up the underside 10b, side wall portions 4, 4 rising upward to cover both sides of the bottom portion 3, and abutment stopper portion 5 extending from the upper end of the side wall portion 4 to overlap the upper side 10a. The electronic control component 10 is disposed on the bottom portion 3 in a state sandwiched between the both side wall portions 4, 4, and is in an assembled state in which it is sandwiched and compressed between the elastic pieces 3A and the abutment stopper portion 5.

[0014] 3, the first engagement portion 2 is formed to protrude from the back surface 3b of the bottom portion 3 opposite to the main surface 3a on which the electronic control component 10 is arranged. The first engagement portion 2 here is an insertion engagement portion that is inserted into the first fixing hole 102H of the panel member 100 on the vehicle body side and is engaged and fixed in a manner that locks against the periphery of the fixing hole 102 at the inserted end. Note that the engagement portion 2 is not limited to that of this reference example, and may be one that is assembled to the vehicle body side with a different shape and a different engagement method.

[0015] Here, the second engagement portion 6 is an arm-shaped portion that extends downward from the back surface 3b of the bottom portion 3, bends at its tip, and extends in a manner that is approximately parallel to the bottom portion 3, and the tip side is formed as an elastic arm that can elastically deform in the vertical direction. When the second engagement portion 6 is inserted into the second fixing hole 106H of the panel member 100 on the vehicle body side, the tip side wraps around to the back side of the panel member 100, and the tip portion 6A is a wraparound engagement portion that engages (contacts) with the back surface of the panel member 100. When the tip portion 6A contacts, the second engagement portion 6 is elastically deformed in a direction such that the tip portion 6A side is separated from the back surface of the panel member 100, and the tip portion 6A presses the panel member 100 from the back surface side to the front surface side.

[0016] When attaching the first and second engagement portions 2, 6 to the panel member 100, first, the second engagement portion 6 is inserted into the second fixing hole 106H of the panel member 100. Then, the first engagement portion 2 is inserted into the first fixing hole 102H of the panel member 100. As a result, the tip portion 6A of the second engagement portion 6 presses the panel member 100 from the back side to the front side, while the first engagement portion 2 is inserted and locked into the first fixing hole 102H, and the surface of the panel member 100 abuts against the abutment portion 30 protruding downward from the bottom portion 3, i.e., the first and second engagement portions 2, 6 are attached to the panel member 100.

[0017] The bottom 3 is disposed with a main surface 3a facing the lower surface 10b of the electronic control component 10. The bottom 3 is provided with a plurality of elastic pieces 3A for pushing up the lower surface 10b. As shown in Figs. 4 to 6, the elastic pieces 3A extend obliquely upward in a cantilever manner from the peripheral portion of a through hole 3H that penetrates vertically through the bottom 3 as a base end, above the through hole 3H, and the tip end is a free end that can be elastically deformed in the vertical direction. When the electronic control component 10 is attached to the electronic control component bracket 1, these elastic pieces 3A are bent downward to constantly push up the electronic control component 10 upward (see Fig. 3).

[0018] The side walls 4, 4 are elastic walls whose upper ends can be elastically deformed outward in the opposing direction. As shown in Figs. 4 to 6, the stopper parts 5, 5 are formed to protrude inward in the opposing direction from the upper ends of the side walls 4, 4, respectively, and have slopes 5a on their upper surfaces that descend toward the inside in the opposing direction. When the electronic control component 10 is assembled, the electronic control component 10 pushes the slopes 5a downward to expand the side walls 4, 4 outward in the opposing direction, and enters between the opposing side walls 4, 4. After entering, the side walls 4, 4 elastically return to their original state, and the stopper parts 5, 5 come into contact with the electronic control component 10 from above. The stopper parts 5, 5 here come into contact with the upper surface 10a of the electronic control component 10 from above.

[0019] Incidentally, the multiple elastic pieces 3A in this reference example are arranged so that when vibrations contained in the vehicle's running vibrations are applied in an assembled state in which the electronic control component 10 is clamped and assembled to the bracket 1 for the electronic control component, the amplitude and vibration period of at least one elastic piece 3A1 are different from those of the other elastic pieces 3A2.

[0020] The elastic piece 3A2 here is provided so that the pressing reaction force pressing the lower surface 10b of the electronic control component 10 is larger than that of the other elastic pieces 3A1. Specifically, the elastic piece 3A is composed of two elastic pieces 3A1 and two elastic pieces 3A2, and the plate width of each elastic piece 3A2 is different from that of each elastic piece 3A1, and this difference in plate width produces a difference in the pressing reaction force, and in turn a difference in either the amplitude or the vibration period. When the four elastic pieces 3A here are projected in the vertical direction Z onto a plane perpendicular to the vertical direction Z, two narrow elastic pieces 3A1 are provided in the first diagonal direction on the approximately rectangular main surface 3a on the projection surface, and two wide elastic pieces 3A2 are provided in the second diagonal direction (see FIG. 5). Note that FIG. 5 is not a projection view, but the elastic pieces 3A are shown in a plan view similar to the projection surface.

[0021] In this way, by including elastic pieces 3A with different amplitudes and vibration periods when vibration is applied, the electronic control component 10 in the assembled state described above generates undulating vibrations (the amplitude is large on the elastic piece 3A1 side and small on the elastic piece 3A2 side). However, an unbalanced support form that allows such undulation can be said to be a form in which the frequency bands in which the acceleration (vibration frequency) increases in each elastic piece 3A are different. In other words, this unbalanced support form is a form in which the frequency bands in which acceleration increases in each elastic piece are dispersed, so that resonance at a specific frequency band does not occur to generate an extremely large acceleration.

[0022] FIG. 7 shows a conventional electronic control component bracket 1000. The same reference numerals are used for the same components as those in the above-mentioned reference example. In the electronic control component bracket 1 of the reference example (see FIG. 4), the plate width is different between the elastic pieces 3A1 and 3A2, but in the electronic control component bracket 1000 of FIG. 7, the plate width, plate thickness, plate length, and shape of the four elastic pieces 3A0 (3A) are all the same. FIG. 8 shows the results of examining the acceleration at each frequency in this conventional electronic control component bracket 1000 by attaching an acceleration sensor to the connector part of the electronic control component 10 and vibrating it on a vibration table. Meanwhile, FIG. 9 shows the results of examining the acceleration at each frequency by the same method in the assembled state in which the electronic control component 10 is assembled in a clamped state to the electronic control component bracket 1 of the reference example. The acceleration peak, which is high between 50 and 60 Hz in FIG. 8, is small in FIG. 9. That is, in the reference example, the acceleration that increases at a specific frequency is suppressed more significantly than in the conventional example, and is below the specified value (the dashed line in the figure).

[0023] Although one reference example of the present invention has been described above, this is merely an example, and the present invention is not limited to this. Various modifications such as additions and omissions are possible based on the knowledge of a person skilled in the art, as long as they do not deviate from the spirit of the claims.

[0024] Below, we will explain another example that is different from the above-mentioned reference example. Note that parts having the same functions as the above-mentioned reference example are given the same reference symbols and detailed explanations are omitted. In addition, the above-mentioned reference example and the following example can be appropriately combined and implemented within the scope that does not cause technical contradiction.

[0025] The multiple elastic pieces 3A in the above reference example include an elastic piece 3A2 having a different plate width from at least one elastic piece 3A1, but as shown in Figures 10 to 12, at least one elastic piece 3A1 may be configured so that any one or more of the plate width, plate thickness, plate length, and shape are different from the other elastic pieces 3A3, 3A4, and 3A5.

[0026] In the above-mentioned reference example, the multiple elastic pieces 3A are arranged in such a way that when the four elastic pieces 3A are projected in the vertical direction Z onto a plane perpendicular to the vertical direction Z, the pressing positions for pressing the lower surface 10b of the electronic control component 10 have rotational symmetry on the projection plane (see FIG. 5). Note that FIG. 5 is not a projection view, but the elastic pieces 3A are shown in a planar manner similar to the projection plane. However, as in the present invention, the pressing positions of the multiple elastic pieces 3A may be distributed so as not to have rotational symmetry or line symmetry on the above-mentioned projection plane (see FIG. 13). In this case, even if the multiple elastic pieces 3A all have the same plate width, plate thickness, plate length, and shape, the imbalance of the pressing positions will result in a support form of the electronic control component 10 that generates undulations as in the above-mentioned reference example (where the plate widths of the elastic pieces 3A are different). As a result, when vibration is applied to the electronic control component 10, differences are created in the pressing reaction force and amplitude of each elastic piece 3A, thereby making it possible to reduce the high acceleration caused by resonance that can occur at specific frequencies. [Explanation of symbols]

[0027] 1 Electronic control component bracket 10 Electronic control parts 10a Top surface of electronic control components 10b Underside of electronic control components 2 Engagement part 3 bottom 3a Bottom main surface 3A Elastic piece 4 Side wall 5 Stopper 5a Slope

Claims

[Claim 1] A bracket for an electronic control component for mounting an electronic control component to a vehicle body, a bottom portion provided with a plurality of elastic pieces arranged on a lower surface side of the electronic control component and pushing up the lower surface; a plurality of abutment stoppers arranged in a plan view so as to abut from above the electronic control component being pushed up; the plurality of elastic pieces are distributed such that each pressing position at which the lower surface is pressed does not have at least rotational symmetry among rotational symmetry and line symmetry within the lower surface so as to disrupt the support balance of the electronic control component; the plurality of elastic pieces have a base end at the periphery of a through hole formed vertically through the bottom portion in a plan view, extend obliquely upward in a cantilever manner over the through hole toward the center of the bottom portion, and have a shape in which the tip is a free end and can be elastically deformed in the vertical direction, and the plate thickness, plate width, plate length and shape are all the same; The bracket for an electronic control component is in an assembled state in which the electronic control component is clamped by the multiple cantilever-shaped elastic pieces and the multiple abutment stoppers, which are arranged in correspondence with each other in a plan view.

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