Attachment structure of coil biasing member

Abstract

To reduce a load on a coil assembly while preventing vibration etc. of the coil assembly and achieve improvement of strength of an attachment structure of the coil assembly.SOLUTION: An attachment structure of a coil biasing member includes: a housing 1 attached to a base 5 and connected with a coil assembly 20 configured to drive an electromagnetic valve 6 through a connection terminal 22; and a coil biasing member 10 which is disposed between the housing 1 and the coil assembly 20 and biases the coil assembly 20 toward the base 5. The housing 1 is provided with an engagement receiving part 2g with which the coil biasing member 10 is engaged. The coil biasing member 10 includes: a base part 11 attached to the housing 1; an elastic part 12 which is provided continuously with the base part 11 and presses the coil assembly 20; and an engagement part 15 which is provided at the elastic part 12 and engaged with the engagement receiving part 2g by pressing force of the elastic part 12. The engagement part 15 is engaged with the engagement receiving part 2g to regulate the pressing force of the elastic part 12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mounting structure for a coil biasing member. [Background technology]

[0002] 2. Description of the Related Art Conventionally, in an electronic control device or the like incorporating a coil assembly, a technique is known in which a coil biasing member is disposed between the housing of the device and the coil assembly (see, for example, Patent Document 1). The coil biasing member of Patent Document 1 is provided in a brake fluid pressure control device mounted on a vehicle. The coil biasing member is disposed between a coil assembly disposed on one surface of a base and a housing, and biases the coil assembly toward the base. The coil assembly is connected to an electric component such as a wiring board in the housing via a connection terminal. The coil assembly is attached to the base in a state where it abuts against one surface of the base by the pressing force of the coil biasing member, with a solenoid valve provided on the base inserted inside.

[0003] The coil biasing member of Patent Document 1 can prevent vibration of the coil assembly caused by vibrations while the vehicle is running and contact between the coil assembly and the solenoid valve, thereby maintaining good electrical connection between the coil assembly and electrical components. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2012-241846 A Summary of the Invention [Problem to be solved by the invention]

[0005] Incidentally, electronic control devices and the like incorporating a coil assembly are generally configured with multiple components, and therefore it is desirable for the component mounting structure to take into consideration component replacement during repair. For example, in the brake fluid pressure control device of Patent Document 1, when the repair component is a solenoid valve, if the housing and the components attached to the housing, such as the coil assembly, can be removed from the base as a unit, the removed housing and components can be reused. For this purpose, it is necessary to previously assemble the coil biasing member and the coil assembly to the housing in a step prior to the mounting process in which the housing is mounted to the base.

[0006] However, if the coil biasing member and the coil assembly are assembled to the housing in advance, there is a risk that the pressing force of the coil biasing member will act as a load on the connection terminals of the coil assembly until the housing is attached to the base. Also, when the housing and the parts are detached from the base as a unit during repair, there is a risk that the pressing force of the coil biasing member will act as a load on the connection terminals of the coil assembly.

[0007] An object of the present invention is to solve the above-mentioned problems and to provide a mounting structure for a coil biasing member that can reduce the load on the coil assembly while preventing vibration, etc. of the coil assembly and improve the strength of the mounting structure for the coil assembly. [Means for solving the problem]

[0008] In order to solve the above problem, the mounting structure for a coil biasing member of the present invention comprises a base on which a solenoid valve is disposed, a housing attached to the base and connected via a connection terminal to a coil assembly that drives the solenoid valve, and a coil biasing member disposed between the housing and the coil assembly and biasing the coil assembly toward the base. A locking receiving portion to which the coil biasing member is locked is formed in the housing. The coil biasing member comprises a base attached to the housing, an elastic portion provided continuous with the base and pressing the coil assembly, and a locking portion provided in the elastic portion and locked to the locking receiving portion by the pressing force of the elastic portion. The pressing force of the elastic portion is regulated by the locking portion being locked to the locking receiving portion.

[0009] In the mounting structure for the coil biasing member of the present invention, a pressing force is applied to the coil assembly via the elastic portion, so that the coil assembly can be pressed against the mounting surface of the base. This makes it possible to prevent the coil assembly from vibrating relative to the base or housing when subjected to an external force, and also to prevent contact between the solenoid valve and the coil assembly.

[0010] Furthermore, by engaging the locking portion with the locking receiving portion, the load applied by the coil biasing member to the coil assembly can be reduced. This makes it possible to reduce the load on the coil assembly from the coil biasing member even when the coil biasing member is disposed between the coil assembly and the housing prior to the mounting process of mounting the housing to the base. This makes it possible to reduce the load on the connection terminal of the coil assembly and the load on the connection portion between the connection terminal and the electrical component. Therefore, according to the mounting structure for the coil biasing member of the present invention, the load on the coil assembly can be reduced while preventing vibration, etc. of the coil assembly by the coil biasing member, thereby improving the strength of the mounting structure for the coil assembly.

[0011] It is preferable that the lock receiving portion protrudes from the housing toward the base and has a hook shape to which the lock portion is locked.

[0012] This coil biasing member mounting structure has a simple configuration, which reduces the load on the coil assembly while improving the strength of the mounting structure for the coil assembly. Also, it can be easily arranged in the limited space between the coil assembly and the housing.

[0013] It is preferable that the coil biasing member has the locking portion engaged with the locking receiving portion in a state prior to the housing being attached to the base, and that when the housing is attached to the base, the locking portion is released and a pressing force of the elastic portion is applied to the coil assembly.

[0014] With this mounting structure for the coil biasing member, the load applied to the coil assembly by the coil biasing member can be reliably suppressed prior to the mounting process in which the housing is mounted to the base. Therefore, the load on the coil assembly can be reliably suppressed while preventing vibrations, etc. of the coil assembly by the coil biasing member, thereby improving the strength of the mounting structure for the coil assembly. Effect of the Invention

[0015] According to the coil biasing member and mounting structure for the coil biasing member of the present invention, it is possible to suppress the load on the coil assembly while preventing vibration and the like of the coil assembly, and as a result, it is possible to improve the strength of the mounting structure for the coil assembly. [Brief description of the drawings]

[0016] [Figure 1] 1 is a partial cross-sectional view for explaining a mounting structure of a coil biasing member according to an embodiment of the present invention; [Diagram 2] FIG. 11 is a partial cross-sectional view illustrating the mounting structure of the coil biasing member as viewed from the lock receiving portion side. [Diagram 3] FIG. 11 is a perspective view showing the coil biasing member disposed on the upper surface of the coil assembly. [Figure 4] 5A and 5B are views showing the coil biasing member, in which FIG. [Diagram 5]13A and 13B are views showing the coil biasing member, in which (a) is a bottom view and (b) is a rear view. [Figure 6] FIG. [Figure 7] 6A and 6B are diagrams showing the action of the pressing force of the coil biasing member, in which (a) is a side view showing the coil biasing member at a stage before the housing is attached to the base, and (b) is a side view showing the coil biasing member in a state in which the housing has been assembled to the base. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following, an electronic control device of a brake fluid pressure control device mounted on a vehicle will be described as an example of a device to which a coil biasing member is to be assembled, but the purpose is not to limit the device to which the coil biasing member is to be assembled. Examples of the vehicle include motorcycles, three-wheeled vehicles, all-terrain vehicles (ATVs), and four-wheeled vehicles, as well as hybrid vehicles that also use a motor, vehicles that are powered only by a motor, fuel cells, and vehicles that are powered only by an engine (internal combustion engine).

[0018] Fig. 1 is a partial cross-sectional view for explaining the mounting structure of a coil biasing member 10 of this embodiment. Fig. 2 is a partial cross-sectional view for explaining the mounting structure of the coil biasing member as seen from the lock receiving portion side. Fig. 3 is a perspective view showing the coil biasing member 10 arranged on the upper surface 23 of a coil assembly 20. In Figures 1 and 2, the side on which the housing 1 is arranged is shown as the upper side, and the side on which the base 5 is arranged is shown as the lower side, for the sake of convenience, and the "upper and lower directions" are shown, but the actual mounting direction of the coil biasing member 10 is not limited to this "upper and lower directions."

[0019] As shown in Fig. 1, a brake fluid pressure control device 50 in which a coil biasing member 10 is incorporated includes a housing 1 and a base body 5. The housing 1 is, for example, a box-shaped member integrally molded from a resin material. A coil assembly 20 is attached to the housing 1 via the coil biasing member 10.

[0020] An intermediate wall 2 is formed inside the housing 1 as a wall portion that divides the internal space of the housing 1. A bus bar 3 and electrical components such as terminals (not shown) are provided on the intermediate wall 2 by molding or the like. A terminal portion 3a of the bus bar 3 is exposed to the inside of a connection terminal insertion portion 2c formed on the intermediate wall 2.

[0021] A coil biasing member 10 is attached to the lower surface 2a of the intermediate wall 2. A coil assembly 20 is disposed below the coil biasing member 10 (see Figs. 1 to 3). As shown in Fig. 3, the coil assembly 20 includes a pair of connection terminals 22, 22 erected on a terminal portion 21. As shown in Figs. 1 and 2, the connection terminals 22, 22 are each electrically connected to the terminal portion 3a (only one connection terminal 22 is shown in Fig. 1). The coil assembly 20 is pre-attached to the intermediate wall 2 by connecting the connection terminals 22, 22 to the terminal portion 3a. The coil assembly 20 comes into contact with the mounting surface 5a of the base 5 at the stage of attaching the housing 1 to the base 5.

[0022] The connection terminals 22, 22 are not limited to those connected to the terminal portion 3a, and may have a press-fit portion configured to be pressed into an insertion hole of a wiring board, etc. In this case, too, the coil assembly 20 is attached in advance to the housing 1 via the press-fit portion.

[0023] A locking receiving portion 2g is integrally formed on the lower surface 2a of the intermediate wall 2, protruding towards the base body 5 (towards the coil assembly 20). As shown in FIG. 1, the locking receiving portion 2g is located on the side of the coil biasing member 10. The locking receiving portion 2g has a plate-like abutment portion 2h extending towards the coil biasing member 10 and has a hook shape in side view. A locking portion 15 of the coil biasing member 10, which will be described later, is engaged with an upper surface of the abutment portion 2h by a pressing force. This abutment restricts the downward pressing force (biasing force) that accompanies the restoration of the elastic portion 12, which will be described later. The lock receiving portion 2g is not limited to being formed integrally with the intermediate wall 2, but may be formed separately and attached to the intermediate wall 2.

[0024] The base 5 is formed of a metal member such as aluminum or an aluminum alloy, and functions as a counterpart member to which the housing 1 is attached. A solenoid valve 6 that functions as a component of a hydraulic circuit is attached to the base 5. The solenoid valve 6 is fixed by inserting a lower portion into a mounting hole (not shown) provided in the base 5, and the other portion protrudes upward from the mounting surface 5a of the base 5. When the housing 1 is attached to the base 5, the portion of the solenoid valve 6 that protrudes upward from the mounting surface 5a is inserted into an insertion hole 20a (see FIG. 3) provided in the center of the coil assembly 20.

[0025] Next, the coil biasing member 10 will be described. Fig. 4(a) is a plan view of the coil biasing member 10, and (b) is a front view. Fig. 5(a) is a bottom view of the coil biasing member 10, and (b) is a rear view. Fig. 6 is a side view of the coil biasing member 10. Fig. 7(a) is a front view showing the coil biasing member 10 in a state prior to mounting the housing 1 to the base 5, and (b) is a front view showing the coil biasing member 10 after the housing 1 has been assembled to the base 5. 4 and 5 are views based on a state in which the device is attached to the intermediate wall 2 (a state in which the locking portion 15 is locked to the lock receiving portion 2g described below), while Fig. 6 is a view based on a state before the device is attached to the intermediate wall 2 (a state in which the elastic portion 12 described below is open (stretched)).

[0026] The coil biasing member 10 is formed by bending a plate-shaped spring member. The coil biasing member 10 acts to press the coil assembly 20 toward (against) the mounting surface 5a of the base 5. For this reason, the coil biasing member 10 is disposed between the coil assembly 20 and the intermediate wall 2 of the housing 1, as shown in Figs. 1 and 2. The coil biasing member 10 is fixed to the lower surface 2a of the intermediate wall 2 of the housing 1 prior to the mounting process in which the housing 1 is mounted to the base 5.

[0027] As shown in Figures 4, 5, and 6, the coil biasing member 10 includes a base 11, an elastic portion 12, and a spring portion 13. In the following, the side of the base 11 or the elastic portion 12 where the spring portion 13 is provided will be referred to as "one end," and the opposite side will be referred to as "the other end." The elastic portion 12 is connected to one end of the base portion 11 via a spring portion 13, and extends from the spring portion 13 to the other end of the base portion 11. A locking portion 15 that is locked to the lock receiving portion 2g of the intermediate wall 2 is formed at the other end of the elastic portion 12. The downward pressing force (biasing force) of the coil biasing member 10 caused by the restoration of the elastic portion 12 is regulated by the locking portion 15 being locked to the lock receiving portion 2g.

[0028] The base 11 is a portion fixed to the lower surface 2a of the intermediate wall 2 (see FIG. 1). As shown in FIG. 4(a), the base 11 has a substantially U-shape in a plan view. The base 11 includes a pair of straight line portions 11d, 11d and a connecting portion 11e connecting the pair of straight line portions 11d, 11d to each other.

[0029] Mounting holes 11b, 11b are formed in the center of the connecting portion 11e. These mounting holes 11b, 11b function as fixing portions for fixing the coil biasing member 10 to the intermediate wall 2 of the housing 1. Protrusions (not shown) protruding from the lower surface 2a of the intermediate wall 2 are inserted into the mounting holes 11b, 11b.

[0030] The elastic portion 12 is a portion that presses the upper surface 23 of the coil assembly 20 (see Figs. 1 and 2). As shown in Fig. 5(a), the elastic portion 12 has a substantially U-shape when viewed from the bottom. The elastic portion 12 includes a pair of straight portions 12d, 12d and a connecting portion 12e that connects the pair of straight portions 12d, 12d to each other.

[0031] An inner portion of connecting portion 12e (a portion continuing to the side portions on the opposing sides of straight portions 12d, 12d) is located closer to the other end than the inner portion of connecting portion 11e of base portion 11. In this way, mounting holes 11b, 11b of base portion 11 are exposed inside the inner portion of connecting portion 12e in a bottom view, so that when assembling coil biasing member 10 to housing 1, it can be visually confirmed that protrusions (not shown) on lower surface 2a of intermediate wall 2 are inserted into mounting holes 11b, 11b. As shown in Fig. 6, a coil elastic portion 12a that protrudes downward is formed on the lower surface of the connecting portion 12e. The coil elastic portion 12a abuts against the upper surface 23 of the coil assembly 20 (see Figs. 1 and 2).

[0032] As shown in Figures 5(a) and 5(b), the locking portion 15 is integrally formed on the other end of the elastic portion 12. As shown in Figures 4(b) and 6, the locking portion 15 has a tongue shape rising upward from the other end of the elastic portion 12. The locking portion 15 abuts against the abutment portion 2h of the lock receiving portion 2g of the intermediate wall 2 due to the pressing force of the elastic portion 12 (i.e., the restoring force of the coil biasing member 10) (see Figures 1 and 2).

[0033] 6, the height dimension L1 of the coil biasing member 10 when the elastic portion 12 is open (stretched) is somewhat larger than the height dimension L2 (see FIG. 7(a)) when the coil biasing member 10 is attached to the intermediate wall 2 (when the locking portion 15 is locked to the locking portion 2g). As a result, the locking portion 15 abuts against the abutment portion 2h of the locking portion 2g with a pressing force.

[0034] The coil biasing member 10 is attached to the intermediate wall 2 with the locking portion 15 locked to the lock receiving portion 2g of the intermediate wall 2 (see FIGS. 1, 2 and 7(a)). The height dimension L2 of the coil biasing member 10 is set so that the coil elastic portion 12a of the elastic portion 12 lightly abuts against the upper surface 23 of the coil assembly 20 in a state where the coil biasing member 10 is attached to the intermediate wall 2 (a state where the locking portion 15 is locked to the lock receiving portion 2g) (see FIGS. 5 and 6(a)). On the other hand, when the housing 1 is assembled to the base 5, the elastic portion 12 of the coil biasing member 10 is pushed upward by the coil assembly 20. In other words, the height dimension L3 (see FIG. 7(b)) of the coil biasing member 10 in a state where the housing 1 is assembled to the base 5 is smaller than the height dimension L2 of the coil biasing member 10 in a state prior to assembling the housing 1 to the base 5.

[0035] Next, the action of the coil biasing member 10 will be described with reference to FIGS. 7(a), in the state prior to mounting the housing 1 to the base 5, the distance between the lower surface 2a of the intermediate wall 2 and the upper surface (top surface) 23 of the coil assembly 20 is maintained at the same distance as the height dimension L2 in the state in which the locking portion 15 is locked to the lock-receiving portion 2g. As a result, in the state prior to mounting the housing 1 to the base 5, the elastic portion 12 of the coil biasing member 10 is in light contact with the upper surface 23 of the coil assembly 20, and no pressing force (biasing force) acts on the coil assembly 20.

[0036] On the other hand, the coil biasing member 10 is set to apply a pressing force to the coil assembly 20 in a state where the housing 1 is attached to the base 5. In a state where the housing 1 is attached to the base 5, the coil assembly 20 is attached to the attachment surface 5a of the base 5, and as shown in FIG. 7(b), the elastic portion 12 is pushed upward by the coil assembly 20. As a result, the distance between the lower surface 2a of the intermediate wall 2 and the upper surface 23 of the coil assembly 20 becomes a height dimension L3 that is smaller than the height dimension L2 of the coil biasing member 10 in the state before the housing 1 is attached to the base 5. In this state, the locking portion 15 is separated from the lock receiving portion 2g and the restriction by the locking is released, so that the elastic portion 12 is in a free state and a pressing force (the restoring force of the coil biasing member 10) is applied to the coil assembly 20. As a result, the coil assembly 20 is pressed against the attachment surface 5a of the base 5.

[0037] According to the mounting structure of the coil biasing member 10 of this embodiment described above, a pressing force is applied to the coil assembly 20 via the elastic portion 12, so that the coil assembly 20 can be pressed against the mounting surface 5a of the base 5. This makes it possible to prevent the coil assembly 20 from vibrating relative to the base 5 or the housing 1 when subjected to an external force, and also makes it possible to prevent contact between the solenoid valve 6 and the coil assembly 20.

[0038] Furthermore, by engaging the locking portion 15 with the lock receiving portion 2g, the load applied by the coil biasing member 10 to the coil assembly 20 can be suppressed. This makes it possible to suppress the load applied to the coil assembly 20 by the coil biasing member 10 even when the coil biasing member 10 is disposed in advance between the coil assembly 20 and the intermediate wall 2 of the housing 1 prior to the mounting process of mounting the housing 1 to the base 5. This makes it possible to suppress the load applied to the connection terminals 22, 22 of the coil assembly 20 and the load applied to the connection portion between the connection terminals 22, 22 and the bus bar 3 (electrical component). Therefore, according to the mounting structure of the coil biasing member 10 of this embodiment, the coil biasing member 10 can prevent vibration, etc. of the coil assembly 20 while suppressing the load on the coil assembly 20, thereby improving the strength of the mounting structure of the coil assembly 20.

[0039] In addition, the simple configuration in which the locking receiving portion 2g has a hook shape protruding from the intermediate wall 2 toward the base 5 can improve the strength of the mounting structure of the coil assembly 20 while suppressing the load on the coil assembly 20. In addition, the coil assembly 20 can be easily arranged in the limited space between the coil assembly 20 and the intermediate wall 2 of the housing 1.

[0040] Furthermore, the load applied by the coil biasing member 10 to the coil assembly 20 can be reliably suppressed prior to the mounting process of mounting the housing 1 to the base 5. Therefore, the load on the coil assembly 20 can be reliably suppressed while preventing vibrations and the like of the coil assembly 20 by the coil biasing member 10, and the strength of the mounting structure of the coil assembly 20 can be improved.

[0041] Although the embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and can be appropriately modified without departing from the spirit of the present invention. For example, in the above embodiment, a coil biasing member 10 is provided in a configuration in which the coil assembly 20 is attached to the housing 1, but this is not limited to this, and the present invention can also be suitably applied to a configuration in which the coil assembly 20 is pre-attached to the mounting surface 5a of the base 5, and the housing 1 to which the coil biasing member 10 is attached is then attached to the base 5.

[0042] Further, the lock receiving portion 2g is shown to be provided on the intermediate wall 2, but is not limited thereto and may be provided on another portion of the housing 1. An example of the other portion is a portion where the coil biasing member 10 can be disposed between the housing 1 and the coil assembly 20, and where the coil biasing member 10 can bias the coil assembly 20 towards the base 5. The other portion also includes members (such as electrical components) attached to the housing 1.

[0043] Further, the lock receiving portion 2g and the lock portion 15 may have various configurations as long as they are configured to regulate the pressing force of the elastic portion 12.

[0044] Moreover, the fixing structure (mounting structure) of the base 11 to the intermediate wall 2 can employ various forms. [Explanation of symbols]

[0045] 1. Housing 2 Intermediate wall (wall section) 2g Locking part 3 Busbars (electrical components) 5 Base 6. Solenoid valve 10 Coil biasing member 11 Base 12 Elastic part 15 Locking part 20 Coil assembly 22 Connection terminal 23 Top side

Claims

1. A mounting structure for a coil biasing member, comprising: a base on which a solenoid valve is disposed; a housing attached to the base and connected via a connection terminal to a coil assembly for driving the solenoid valve; and a coil biasing member disposed between the housing and the coil assembly for biasing the coil assembly toward the base, The housing is formed with a locking portion to which the coil biasing member is locked, The coil biasing member is a base attached to the housing; an elastic portion provided continuously with the base portion and configured to press the coil assembly; a locking portion that is provided on the elastic portion and is locked to the lock receiving portion by a pressing force of the elastic portion, A mounting structure for a coil biasing member, wherein the pressing force of the elastic portion is regulated by the locking portion being locked to the lock receiving portion.

2. The lock receiving portion is 2. The mounting structure for a coil biasing member according to claim 1, further comprising a hook-shaped member protruding from said housing toward said base and adapted to engage with said engaging portion.

3. The coil biasing member is the locking portion is locked to the locking receiving portion in a state prior to mounting the housing to the base body, 3. The mounting structure of a coil biasing member according to claim 1, wherein, when the housing is mounted on the base, the locking portion is released and a pressing force of the elastic portion is applied to the coil assembly.

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