Electronic circuit board and oil pump

Abstract

To reduce the breakage of an electronic circuit board.SOLUTION: The electronic circuit board with a notch includes: a first side forming the notch; a second side facing the first side; a first region including the first side; a second region including the second side; and a terminal connected to the first region and the second region, the terminal reinforcing the rigidity of the electronic circuit board by integrating the first and second regions together across the notch.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to an electronic circuit board and an oil pump. [Background technology]

[0002] Efforts are being made to promote the Sustainable Development Goals (2030 Agenda for Sustainable Development, adopted at the United Nations Summit on September 25, 2015, hereafter referred to as "SDGs"). Specifically, technologies that aim to reduce defective products in order to ensure sustainable production and consumption patterns are known.

[0003] Also, a configuration is known in which an electronic circuit board or the like is arranged to control a motor. In addition, for example, depending on the layout of the electronic circuit board, linear notches or insertion holes are formed on the outer periphery of the metal board to pass wires or the like through. Thus, a technique using an electronic circuit board having notches is known (for example, Patent Document 1, etc.). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2017-55567 A Summary of the Invention [Problem to be solved by the invention]

[0005] In the technology disclosed in Patent Document 1, defects are likely to occur in the notch or the periphery of the notch. Specifically, the notch or the periphery of the notch is likely to have reduced properties such as rigidity. Therefore, the technology disclosed in Patent Document 1 has a problem that when the board is deformed due to vibration, heat, or the like, stress is generated in the electronic circuit board, making the electronic circuit board prone to breakage.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and has an object to provide an electronic circuit board or the like that is less susceptible to damage. [Means for solving the problem]

[0007] In the present invention, the electronic circuit board having the notch includes: A first side forming the notch; a second side located opposite to the first side; A first region including the first side; A second region including the second side; a terminal connected to both the first region and the second region and assembled to straddle the notch to reinforce the rigidity of the electronic circuit board; The present invention is characterized by comprising: Effect of the Invention

[0008] Damage to electronic circuit boards, etc. can be reduced. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram illustrating an example of an oil pump 1. FIG. [Diagram 2] 4A to 4C are diagrams illustrating examples of constraints on the oil pump 1. [Diagram 3] 2A to 2C are diagrams showing examples of objects that the oil pump 1 stores. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] 2 is a diagram showing the inside of the oil pump 1. FIG. [Figure 7] 1 is a diagram showing an example of an electronic circuit board 20 from the front. [Figure 8] 2 is a diagram showing an example of an electronic circuit board 20 from a side view. [Figure 9] 11A and 11B are diagrams showing an example of assembling a terminal. [Figure 10] FIG. 13 is a diagram showing an example of distance etc. [Figure 11] FIG. 13 is a diagram showing an example of chamfering. [Figure 12] FIG. 13 is a diagram showing an example of a circle. [Figure 13] FIG. 13 is a diagram showing an example of a trapezoid. [Figure 14] FIG. 1 is a diagram showing an example of a triangle. [Figure 15] 1A to 1C are diagrams illustrating an example of use of the oil pump 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] 1 is a diagram showing an example of an oil pump 1. The following describes the oil pump 1 as an example. For example, the oil pump 1 includes an oil pump housing cover 10, a housing 11, and a pump unit 14. However, the oil pump 1 may include components other than the oil pump housing cover 10, the housing 11, and the pump unit 14.

[0012] The pump unit 14 performs operations such as sucking up oil and sending the oil to a predetermined position, etc. The oil pump 1 may also include a relief valve, etc.

[0013] The relief valve discharges oil to the outside when the discharge pressure of the pump exceeds the set pressure of the relief valve. In this way, when the discharge pressure of the pump exceeds the set pressure of the relief valve, the oil pump 1 activates the relief valve to discharge oil to the outside. Therefore, the oil pump 1 can keep the pressure on the discharge side of the pump (for example, the pressure in the pump's discharge piping or casing) below a predetermined pressure.

[0014] The oil pump housing cover 10 is attached to the housing 11 by a fastening member such as a screw. The fastening member may be of a type other than a screw. In particular, it is preferable that the fastening member includes a member that improves sealing performance.

[0015] Furthermore, the size, type, or oil handled by the oil pump 1 does not matter. For example, the oil pump 1 is an oil pump 1 that can be used in vehicles that are exposed to environments of -40°C to 120°C. The oil pump 1 is also a device that satisfies specifications such as being able to be stored at -40°C to 140°C, clearing a heat shock test at -40°C to 140°C, or clearing a vibration test of 20G. Furthermore, the oil pump 1 is also subject to the following constraints.

[0016] 2 is a diagram showing examples of constraints on the oil pump 1. For example, the oil pump 1 is subject to a constraint in terms of layout, such as being short in the vertical direction in the figure, i.e., in the Z-axis direction. Under such constraints, the oil pump 1 accommodates, for example, the following objects.

[0017] 3 is a diagram showing examples of objects housed in the oil pump 1. For example, the oil pump 1 houses objects such as a motor 15, an electronic circuit board 20, and a plurality of welding terminals 12.

[0018] The motor 15 rotates under the control of an electronic circuit board or the like.

[0019] The object is stored in the oil pump 1, for example, as follows.

[0020] 4 is a diagram showing an example of storage. For example, as shown in the figure, the welding terminal 12 and the like are surrounded by four walls (hereinafter referred to as the "first wall W1", the "second wall W2", the "third wall W3", and the "fourth wall W4") provided in the housing 11. For example, an opening 21 is formed by the first wall W1, the second wall W2, the third wall W3, and the fourth wall W4.

[0021] The first wall W1 is a wall that forms a plane in the first direction and the second direction, that is, on the ZX plane.

[0022] The second wall W2 is a wall that intersects with the first wall W1 and forms a plane in the first direction and the third direction, that is, on the ZY plane.

[0023] The third wall W3 intersects with the first wall W1 at an end different from the second wall W2 and forms a plane in the first direction and the third direction, that is, on the ZY plane.

[0024] The fourth wall W4 is a wall that intersects with the second wall W2 and the third wall W3 and forms a plane in the first direction and the second direction, that is, on the XZ plane.

[0025] The oil pump housing cover 10 is a flat plate that forms a plane in the second direction and the third direction, i.e., on the XY plane. When the opening 21 is covered with the oil pump housing cover 10 and the electronic circuit board 20 is stored inside the housing 11, the oil pump 1 can protect the stored object.

[0026] 5 is a cross-sectional view. The following description will be given using the cross section taken along the line A-A'. For example, the state after the electronic circuit board 20 is stored using a fastening member such as a screw 13 is as follows.

[0027] 6 is a diagram showing the inside of the oil pump 1. In the following, electronic components mounted on the electronic circuit board 20 are omitted. As shown in the figure, the oil pump housing cover 10 may have ribs or the like.

[0028] The electronic circuit board 20 has, for example, the following shape.

[0029] Fig. 7 is a front view of an example of the electronic circuit board 20. Specifically, Fig. 7(A) is a view showing the front surface of the electronic circuit board 20. Meanwhile, Fig. 7(B) is a view showing the back surface of the electronic circuit board 20.

[0030] FIG. 8 is a side view of an example of the electronic circuit board 20. As shown in FIG.

[0031] For example, the notches are a first notch 31 (referring to a notch formed on the left side in the figure) and a second notch 32 (referring to a notch formed on the upper side in the figure), etc. Below, as shown in the figure, an electronic circuit board 20 having two notches will be described as an example.

[0032] The notch is a portion missing from an edge of the electronic circuit board 20. For example, the notch is manufactured by designing its outer shape to create a hollow area with no board, such as a rectangular shape. The notch may have chamfered corners. The notch is not limited to a rectangular shape, and may have a shape with a step or the like. The notch may also have another shape, such as a circular shape.

[0033] Furthermore, the electronic circuit board 20 may have two or more notches.

[0034] In the example shown in Figures 7(A) and 7(B), the first notch 31 is composed of a first side 41, a second side 42, and a third side 43, etc. Also, as shown in Figures 7(A) and 7(B), the first notch 31 is rectangular.

[0035] Furthermore, the first notch 31 is an example having a step on the third side 43. In the example shown in the figure, the step has two steps, but the step may have three or more steps. The step may also be on another side.

[0036] The first side 41 is formed, for example, in the X-axis direction. The second side 42 is formed in the X-axis direction at a position opposite to the first side 41. The third side 43 is formed in the Y-axis direction so as to intersect with the first side 41 and the second side 42.

[0037] For the first notch 31, the electronic circuit board 20 is provided with terminals, for example, as follows.

[0038] Fig. 9 is a diagram showing an example of assembling the terminals. Hereinafter, of the two terminals, the terminal attached to the first notch 31 will be referred to as the "first terminal 51". On the other hand, the terminal attached to the second notch 32 will be referred to as the "second terminal 52". Below, an example of assembling the first terminal 51 will be described. In this way, there may be two or more terminals.

[0039] The first terminal 51 connects a first end 511 to the first region 61. Meanwhile, the first terminal 51 connects a second end 512 to the second region 62.

[0040] The first region 61 is a region including the first side 41 and a first through hole 610. The first through hole 610 is a hole through which a first screw 611, which is an example of a first fastening member, passes.

[0041] The second region 62 is a region including the second side 42, a second through hole 620, etc. The second through hole 620 is a hole through which a second screw 621, which is an example of a second fastening member, passes.

[0042] Further, the first region 61 and the second region 62 are positioned to face each other with the first notch 31 in between. The first region 61 and the second region 62 do not have to be positioned to face each other strictly. That is, in the example shown in Fig. 7, the first region 61 and the second region 62 are positioned to face each other and are line-symmetrical about the X-axis, but the first region 61 and the second region 62 do not have to be positioned to face each other line-symmetrically. For example, the terminal may straddle the notch diagonally.

[0043] The first terminal 51 has a first end 511 fixed to the first region 61 by a first through hole 610 and a first screw 611. On the other hand, the first terminal 51 has a second end 512 fixed to the second region 62 by a second through hole 620 and a second screw 621. Therefore, the first terminal 51 is assembled so as to straddle the first notch 31.

[0044] When the terminal is assembled in this manner, damage to the electronic circuit board 20 and the periphery of the electronic circuit board 20 can be reduced.

[0045] The damage may be, for example, a crack in the electronic circuit board 20. Specifically, when a crack occurs in all or a part of the electronic circuit board 20, the pattern formed on the electronic circuit board 20 is interrupted. When the pattern is interrupted in this manner, it becomes difficult for an electric signal or current to pass through the pattern.

[0046] Alternatively, when the rigidity of the electronic circuit board 20 is reduced, the electronic circuit board 20 is prone to twisting, warping, etc. When twisting, warping, etc. occurs in this manner, electronic components mounted on the electronic circuit board 20 may come off, resulting in poor contact in which the electronic components are not electrically connected.

[0047] When vibration or heat occurs, the notch or the periphery of the notch is likely to have lower rigidity than other parts, and so stress is likely to concentrate thereon. In particular, stress is likely to occur at the four corners of the notch. Therefore, the notch or the periphery of the notch is likely to become a cause of breakage. Therefore, it is desirable to take measures against breakage at the notch. Specifically, as shown in FIG. 9, it is desirable for the electronic circuit board 20 to be provided with a terminal so as to straddle the notch that is the target of the measures.

[0048] However, the terminals may have any type, material, shape, and installation position that can reinforce the rigidity of the electronic circuit board 20, and may have a configuration other than the first terminal 51 and the second terminal 52 shown in Fig. 7. For example, the terminals may be fixed at three or more points, or may be surface-mounted electronic components (so-called SMDs, etc.).

[0049] In this way, when an electronic circuit board 20 having a notch is provided with a terminal that is attached so as to straddle the notch and reinforces the rigidity of the electronic circuit board 20, twisting or warping, etc. can be reduced, and damage to the electronic circuit board 20, etc. can be reduced.

[0050] The terminals are, for example, conductive terminals. The terminals may be a "terminal unit" in which the terminals are combined with a resin that molds the terminals. The terminals are preferably made of a material that is strong enough to reinforce the electronic circuit board 20. The resin used in the terminal unit is preferably made of a material that contains a reinforcing material. The terminals are preferably heat resistant to temperatures of 140 degrees or higher. A terminal that has such heat resistance can meet the storage temperature requirements of an electric oil pump that is installed in, for example, the engine room of a vehicle.

[0051] It is preferable that the notches and terminals have the following shapes, dimensions and distances.

[0052] 10 is a diagram showing an example of distances etc. Below, the electronic circuit board 20 and the electronic components mounted on the electronic circuit board 20 are shown in simplified form.

[0053] For example, if the second terminal 52 is a connector or the like, an object such as a connector pin 520 (hereinafter referred to as a "first object") passes through the notch. Hereinafter, the distance between the side constituting the notch and the first object will be referred to as a "first distance 71."

[0054] The first distance 71 is the shortest distance between the first object and the sides that form the notch. In other words, the first distance 71 is the distance at which the first object is closest to the notch.

[0055] In the case where first terminal 51 has a component such as a connector, the component such as terminal 510 of first terminal 51 is referred to as a “second object.” Hereinafter, the distance between the side constituting the notch and the second object is referred to as a “second distance 72.”

[0056] The second distance 72 is the shortest distance between the second object and the side that constitutes the notch. In other words, the second distance 72 is the distance at which the second object is closest to the notch.

[0057] It should be noted that the first object and the second object are not limited to electronic components, and may be mechanical components, parts of terminals, etc. Furthermore, the side may be any side as long as it constitutes a notch.

[0058] It is desirable that the first distance 71 and the second distance 72 are equal to or greater than 1 millimeter plus a safety factor. Therefore, it is desirable that the notch is formed such that the first distance 71 and the second distance 72 are equal to or greater than 1 millimeter plus a safety factor.

[0059] The safety factor is preferably 1 mm or more, and therefore the first side, the second side, etc. are preferably formed to be at a distance of 2 mm or more from the first object or the second object.

[0060] Unless the first distance 71 and the second distance 72 are at least about 1 millimeter, there is a possibility that the electronic circuit board 20 and the first object, etc. Furthermore, the first distance 71 and the second distance 72 may vary from product to product due to the accuracy of assembling the terminal to the electronic circuit board 20, the manufacturing error of the electronic circuit board 20, the manufacturing error of the first object, etc.

[0061] Therefore, if the first side, the second side, etc. are separated from the first object or the second object by 2 millimeters or more, even if there is variation, interference between the electronic circuit board 20 and the first object, etc. can be prevented.

[0062] On the other hand, it is desirable to design the notch to have dimensions as small as possible while still ensuring the safety factor and the like as described above.

[0063] [Variations] The notch may have, for example, the following shape. For the sake of explanation, the following will explain only one notch that the electronic circuit board 20 has. Also, for the sake of explanation, terminals and the like are omitted from the following drawings.

[0064] 11 is a diagram showing an example of chamfering. For example, the notch may be chamfered at corners, etc. Note that the chamfering may be performed at corners other than those shown in the drawings.

[0065] 12 is a diagram showing an example of a circular shape. For example, the notch may have a circular shape (including a semicircle or a 3 / 4 circle, etc.) due to the first side 201. In this way, when the notch is circular, the first region 61 and the second region 62 are positioned opposite each other with the notch in between. Therefore, the electronic circuit board 20 may have a terminal attached to straddle the circular notch to reinforce the rigidity of the electronic circuit board 20.

[0066] 13 is a diagram showing an example of a trapezoid. For example, the cutout may be in the shape of a trapezoid or the like that is composed of a first side 301, a second side 302, and a third side 303.

[0067] 14 is a diagram showing an example of a triangle. For example, the cutout may be in the shape of a triangle formed by a first side 401 and a second side 402.

[0068] The shape of the notch is not limited to the one shown above. That is, the notch may have a shape other than the example shown above. In other words, the notch may have any shape as long as the first region and the second region are positioned opposite each other with the notch therebetween so that the terminal straddles them.

[0069] In this way, when an electronic circuit board 20 having a notch that is rectangular, trapezoidal, stepped, triangular, circular, or a combination of these shapes is provided with a terminal to reinforce the rigidity of the electronic circuit board 20, damage to the electronic circuit board 20, etc. can be reduced.

[0070] [Example of Oil Pump 1 usage environment] 15 is a diagram showing an example of use of the oil pump 1. For example, as shown in the figure, the oil pump 1 is used in a vehicle in an environment where the oil pump 1 is partially or entirely submerged in oil.

[0071] The oil pump 1 is used in a transmission case of an AT (automatic transmission) vehicle. Specifically, the inside of the transmission case is an environment in which oil 2 accumulates. The oil pump 1 is used in a state in which about half of it is immersed in the oil 2.

[0072] Therefore, the oil pump 1 has a structure that protects the components from oil and the like, and is composed of components that ensure reliability even in the illustrated environment.

[0073] [Contribution to promoting SDGs] As described above, the present embodiment has an effect of reducing damage to the electronic circuit board 20 used in the oil pump 1. Specifically, the electronic circuit board 20 can reduce early failures or accidental failures in the failure rate curve caused by damage to the electronic circuit board 20. Therefore, the number of defective products due to damage can be reduced for products such as the oil pump 1 and the electronic circuit board 20. Alternatively, if the oil pump 1 and the electronic circuit board 20 are configured to be less prone to damage, there may be an effect of extending the life of the product. Therefore, the present invention has an effect of reducing defects in products to which it is applied. As a result, the effects of reducing waste or extending the life of the product contribute to the SDGs' "Goal 12: Ensure sustainable consumption and production patterns" and "Goal 13: Take urgent action to mitigate climate change and its impacts".

[0074] [Other embodiments] The present invention is not limited to the above-mentioned examples, and there are various modifications. The above description is provided for the purpose of providing a clear and sufficient detailed description so that a person having ordinary knowledge in the technical field can carry out the present invention, and the present invention is not limited to the embodiment having all of the configurations described above. The present invention may also be an embodiment in which a part of the above-mentioned examples is replaced with the configuration of another embodiment. Furthermore, the present invention may also be an embodiment in which the configuration of another embodiment is added to the above-mentioned examples. Furthermore, the present invention may also be an embodiment in which another configuration is added, deleted, or replaced with respect to a part of the above-mentioned examples. The present invention may also be an embodiment in which the present invention is incorporated into another product, etc. That is, the present invention is subject to various modifications and changes within the scope of the claims. [Explanation of symbols]

[0075] 1: Oil pump 10: Oil pump housing cover 11: Housing 20: Electronic circuit board 21: Opening 31: First notch 32: Second notch 41, 201, 301, 401: Side 1 42, 302, 402: Side 2 43, 303: Third side 51: Terminal 1 52: Terminal 2 61: 1st area 62:Second area 71: 1st distance 72 :Second distance 511 :1st end 512: 2nd end 610: First through hole 620: 2nd through hole

Claims

1. An electronic circuit board having a notch, A first side forming the notch; a second side located opposite to the first side; A first region including the first side; A second region including the second side; a terminal connected to both the first region and the second region and assembled to straddle the notch to reinforce the rigidity of the electronic circuit board; Equipped with The notch is The first side and the second side, The first side and the third side intersecting the second side The shape is rectangular, trapezoidal, or stepped. Electronic circuit board.

2. An electronic circuit board having a notch, A first side forming the notch; a second side located opposite to the first side; A first region including the first side; A second region including the second side; a terminal connected to both the first region and the second region and assembled to straddle the notch to reinforce the rigidity of the electronic circuit board; Equipped with The notch is The first side and the second side constitute It is triangular in shape, Electronic circuit board.

3. The notch is The first side and the second side are formed so as to be at a distance of 1 mm plus a safety distance or more from a first object passing through the notch or a second object included in the terminal.

3. The electronic circuit board according to claim 1 or 2.

4. The safety distance is equal to or greater than 1 millimeter; The first side and the second side are formed at a distance of 2 millimeters or more from the first object or the second object. The electronic circuit board according to claim 3 .

5. the notch is a cavity including the first side and the second side, The terminal has a first end fixed to the first region by a first fastening member and a second end fixed to the second region by a second fastening member, the first region includes the first side and a first through hole penetrating the first fastening member, the second region includes the second side and a second through hole penetrating the second fastening member, The first region and the second region face each other across the notch. The electronic circuit board according to claim 1 .

6. An electronic circuit board having a circular cutout, A first side forming the notch; A first region including the first side; a second region located opposite the first region; a terminal connected to both the first region and the second region and assembled to straddle the notch to reinforce the rigidity of the electronic circuit board; The electronic circuit board comprising: a housing having an opening and housing the electronic circuit board therein; A cover for covering the opening; and a fastening member for fastening the cover to the housing.

7. An electronic circuit board according to any one of claims 1 to 5; a housing having an opening and housing the electronic circuit board therein; A cover for covering the opening; and a fastening member for fastening the cover to the housing.

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