21 is a solenoid valve which is opened in the non-energized state. Further, for example, when the coil 73 is in the non-energized state, the outlet valve 22 disables the flow of the brake fluid. Then, when the coil 73 is energized, the outlet valve 22 is opened to enable the flow of the brake fluid in both directions. That is, in this embodiment, the outlet valve 22 is a solenoid valve which is closed in the non-energized state.

Further, the brake fluid pressure control device 1 includes an accumulator 23. The accumulator 23 is connected to the outlet side of the fourth flow path 17 and stores the brake fluid having passed through the outlet valve 22.

Further, the brake fluid pressure control device 1 includes a hydraulic pressure sensor 103 for detecting the hydraulic pressure of the brake fluid of the wheel cylinder 251. The hydraulic pressure sensor 103 is provided to the second flow path 15 or the third flow path 16.

Further, the brake fluid pressure control device 1 includes a control unit 30. Signals of various sensors such as the hydraulic pressure sensor 103 and a vehicle wheel speed sensor (not shown) for detecting the rotation speed of the front wheel 217 are input to the control unit 30. Additionally, each part of the control unit 30 may be arranged together or dispersedly. For example, the control unit 30 may be configured to include a microcomputer, a microprocessor unit, and the like, may be configured to include an updatable one such as firmware, or may be configured to include a program module or the like executed by an instruction from a CPU and the like.

The control unit 30 controls the energization of the coil 71 and the coil 73. Specifically, the control unit 30 controls the driving (opening and closing operation) of the inlet valve 21 by controlling the energization of the coil 71. Further, the control unit 30 controls the driving (opening and closing operation) of the outlet valve 22 by controlling the energization of the coil 73. That is, the control unit 30 controls the hydraulic pressure of the brake fluid of the wheel cylinder 251, that is, the braking force of the front wheel 217 by controlling the opening and closing operation of the inlet valve 21 and the outlet valve 22.

Additionally, in this embodiment, at least the configuration for controlling the energization of the coil 71 and the coil 73 among the configurations of the control unit 30 is configured by a circuit board 31 described later. That is, the circuit board 31 controls the driving of the inlet valve 21 and the outlet valve 22 by controlling the energization of the coil 71 and the coil 73.

For example, if it is determined that the front wheel 217 is locked or may be locked from the signal of the vehicle wheel speed sensor (not shown) when the front wheel 217 is braked by the user's operation of the brake lever 241, the control unit 30 starts anti-lock braking control.

If the anti-lock braking control starts, the control unit 30 suppresses an increase in pressure of the brake fluid of the wheel cylinder 251 by disabling the flow of the brake fluid from the master cylinder 242 to the wheel cylinder 251 in such a manner that the coil 71 is energized and the inlet valve 21 is closed. On the other hand, the control unit 30 decreases the pressure of the brake fluid of the wheel cylinder 251 by enabling the flow of the brake fluid from the wheel cylinder 251 to the accumulator 23 in such a manner that the coil 73 is energized and the outlet valve 22 is opened. Accordingly, the lock of the front wheel 217 is released or avoided. If it is determined that the brake fluid of the wheel cylinder 251 is depressurized to a predetermined value from the signal of the hydraulic pressure sensor 103, the control unit 30 does not energize the coil 73 to close the outlet valve 22 and does not energize the coil 71 to open the inlet valve 21 for a short period of time so that the pressure of the brake fluid of the wheel cylinder 251 increases and decreases. The control unit 30 may increase and decrease the pressure of the wheel cylinder 251 only once or a plurality of times in a repeated manner.

If the anti-lock braking control ends and the brake lever 241 is returned, the inside of the master cylinder 242 enters an atmospheric pressure state and the brake fluid in the wheel cylinder 251 is returned. Further, the outlet valve 22 is opened when the anti-lock braking control ends and the brake lever 241 is returned. If the pressure of the brake fluid in the flow path 13 becomes lower than the pressure of the brake fluid stored in the accumulator 23, the brake fluid stored in the accumulator 23 is discharged to the outside of the accumulator 23 without boosting (that is, without pump), is returned to the flow path 13, and is eventually returned to the master cylinder 242.

The brake fluid pressure control device 1 includes the base body 10, the coils 70, the circuit board 31, and a housing 40. Hereinafter, a configuration of the brake fluid pressure control device 1 according to this embodiment will be described.

FIG. 3 is a cross-sectional view of the brake fluid pressure control device according to the embodiment of the invention. Specifically, the housing 40 of the brake fluid pressure control device 1 includes a main body portion 50 and a lid 60. As will be described later, the main body portion 50 includes a groove portion 52 and the lid 60 includes an insertion wall 61 which is inserted into the groove portion 52. FIG. 3 is a cross-sectional view in which the housing 40 is cut in a virtual plane which is parallel to a first direction corresponding to the facing direction between the main body portion 50 and the lid 60 and passes through the insertion wall 61, an outer peripheral wall 54 of the groove portion 52, and an inner peripheral wall 55 of the groove portion 52. Hereinafter, the first direction which is the facing direction between the main body portion 50 and the lid 60 is set as a first direction Y. Further, in the cross-sectional view shown in FIG. 3, a direction perpendicular to the first direction Y is set as a second direction X.

Further, FIG. 4 is a view in which the lid of the housing of the brake hydraulic pressure control device according to the embodiment of the invention is viewed from the main body portion side of the housing. Additionally, in FIG. 4, the shape of the opening portion of the groove portion 52 of the main body portion 50 is indicated by a two-dotted chain line which is an imaginary line.

The base body 10 is, for example, a substantially rectangular parallelepiped member made of an aluminum alloy. Each surface of the base body 10 may be flat or may include a curved portion or a step. The coil 71 and the coil 73 which are the coils 70 are erected on the surface 18 of the base body 10.

Specifically, as described above, the brake fluid pressure control device 1 according to this embodiment includes the inlet valve 21 and the outlet valve 22 as the hydraulic pressure adjusting valve 20. On the other hand, a recess portion 24 and a recess portion 25 are formed in the base body 10. In the recess portion 24, the outlet side of the first flow path 14 and the inlet side of the second flow path 15 communicate with each other and the inlet valve 21 is movably provided. Then, the flow of the brake fluid between the first flow path 14 and the second flow path 15 is enabled and disabled when the inlet valve 21 moves in the recess portion 24. Further, in the recess portion 25, the outlet side of the third flow path 16 and the inlet side of the fourth flow path 17 communicate with each other and the outlet valve 22 is movably provided. Then, the flow of the brake fluid between the third flow path 16 and the fourth flow path 17 is enabled and disabled when the outlet valve 22 moves in the recess portion 25. In a state in which the inlet valve 21 is provided to the recess portion 24, a part of the inlet valve 21 protrudes from the surface 18 toward the outside of the base body 10. The coil 71 which drives the inlet valve 21 is erected on the surface 18 of the base body 10 to surround the protruding portion of the inlet valve 21. Similarly, a part of the outlet valve 22 protrudes from the surface 18 toward the outside of the base body 10 in a state in which the outlet valve 22 is provided in the recess portion 25. The coil 73 which drives the outlet valve 22 is erected on the surface 18 of the base body 10 to surround the protruding portion of the outlet valve 22.

The circuit board 31 which controls the energization of the coil 71 and the coil 73 is electrically connected to the coil 71 and the coil 73. In this embodiment, the circuit board 31 is electrically connected to the coil 71 via a connection terminal 72 and is electrically connected to the coil 73 via a connection terminal 74.

The housing 40 is connected to the base body 10 to cover the coil 70 and the circuit board 31. In this embodiment, the housing 40 is connected to the surface 18 of the base body 10. Further, the brake fluid pressure control device 1 according to this embodiment includes the hydraulic pressure sensor 103 as described above. In this embodiment, the hydraulic pressure sensor 103 is also covered by the housing 40.

This housing 40 includes the main body portion 50 and the lid 60 as described above. The main body portion 50 is connected to the housing 40. Further, an opening portion 51 is formed in the main body portion 50. The opening portion 51 is used, for example, when accommodating the circuit board 31 and the like in the housing 40. In this embodiment, the opening portion 51 has, for example, a substantially square shape and is formed at a position facing the circuit board 31. The lid 60 covers the opening portion 51 and is attached to the main body portion 50. In order to prevent moisture or the like from entering the housing 40 from between the main body portion 50 and the lid 60, the housing 40 improves the airtightness between the main body portion 50 and the lid 60 by the following configuration.

FIG. 5 is an enlarged view of an A part of FIG. 3. In FIG. 5, the left side of the paper is the outside of the housing 40 and the right side of the paper is the inside of the housing 40. That is, in FIG. 5, the left side of the paper is the outside of the brake fluid pressure control device 1.

The main body portion 50 includes the groove portion 52 which is formed on the outer peripheral side of the opening portion 51 to open toward the lid 60. As shown in FIG. 4, in this embodiment, the shape of the opening portion of the groove portion 52 corresponds to the shape of the opening portion 51 when viewed from the side of the lid 60 and has a substantially square frame shape. This groove portion 52 includes a bottom portion 53, the outer peripheral wall 54 which constitutes the outer peripheral wall of the groove portion 52 and extends from the bottom portion 53 toward the lid 60, and the inner peripheral wall 55 which constitutes the inner peripheral wall of the groove portion 52 and extends from the bottom portion 53 toward the lid 60. Further, the length of the outer peripheral wall 54 in the first direction Y is longer than the length of the inner peripheral wall 55 in the first direction Y.

On the other hand, the lid 60 includes the insertion wall 61 which extends toward the main body portion 50 and is inserted into the groove portion 52. As shown in FIG. 4, in this embodiment, the shape of the insertion wall 61 corresponds to the shape of the groove portion 52 when viewed from the side of the main body portion 50 and has a substantially square frame shape. In a state in which the insertion wall 61 is inserted into the groove portion 52, a space 80 is formed between the outer peripheral wall 54 and the insertion wall 61 and between the inner peripheral wall 55 and the insertion wall 61. This space 80 is a space which stores a sealing material. Then, the housing 40 according to this embodiment improves the airtightness between the main body portion 50 and the lid 60 by sealing a gap between the groove portion 52 and the insertion wall 61 with the sealing material stored in the space 80. Additionally, in this embodiment, the space 80 for storing the sealing material is also formed between the insertion wall 61 and the bottom portion 53 of the groove portion 52.

The housing 40 with such a configuration first charges the sealing material into the groove portion 52 of the main body portion 50 when attaching the lid 60 to the main body portion 50. Then, the insertion wall 61 of the lid 60 is inserted into the groove portion 52 charged with the sealing material. Accordingly, the sealing material in the groove portion 52 is pressed by the insertion wall 61 to flow between the outer peripheral wall 54 and the insertion wall 61 and between the inner peripheral wall 55 and the insertion wall 61. Then, the sealing material is stored between the outer peripheral wall 54 and the insertion wall 61 and between the inner peripheral wall 55 and the insertion wall 61 and a gap between the groove portion 52 and the insertion wall 61 is sealed by the sealing material.

Incidentally, also in the housing of the conventional brake hydraulic pressure control device, the airtightness between the main body portion and the lid is improved by the groove portion provided to the main body portion and the insertion wall provided to the lid and inserted into the groove portion of the main body portion. Hereinafter, the conventional brake fluid pressure control device including such a housing will be described. When describing the conventional brake fluid pressure control device below, the same configuration as the configuration of the brake fluid pressure control device 1 according to this embodiment will be described by adding “300” to the reference numeral of the configuration of the brake fluid pressure control device 1 according to this embodiment.

FIG. 6 is a main cross-sectional view showing the periphery of the groove portion of the main body portion of the housing of the conventional brake hydraulic pressure control device. FIG. 6 is a view in which a conventional brake fluid pressure control device 301 is cut in the same cross-section as that of FIG. 3 and the same position as that of the A part of FIG. 3 is observed. Therefore, in FIG. 6, the left side of the paper is the outside of a conventional housing 340 and the right side of the paper is the inside of the conventional housing 340. That is, in FIG. 6, the left side of the paper is the outside of the conventional brake fluid pressure control device 301.

Similarly to the main body portion 50 according to this embodiment, a main body portion 350 of the housing 340 of the conventional brake fluid pressure control device 301 includes a groove portion 352 which is formed on the outer peripheral side of the opening portion 351 to open toward a lid 360 of the housing 340. Here, the groove portion 352 is different from the groove portion 52 according to this embodiment in that the length of an outer peripheral wall 354 in the first direction Y is not longer than the length of an inner peripheral wall 355 in the first direction Y. Further, similarly to the lid 60 according to this embodiment, the lid 360 of the housing 340 of the conventional brake fluid pressure control device 301 includes an insertion wall 361 which extends toward the main body portion 350 and is inserted into the groove portion 352. Further, in a state in which the insertion wall 361 is inserted into the groove portion 352, a space for storing a sealing material is formed between the outer peripheral wall 354 and the insertion wall 361 and between the inner peripheral wall 355 and the insertion wall 361.

For the attachment of the lid 360 to the main body portion 350, the sealing material is charged into the groove portion 352 of the main body portion 350 similarly to the housing 40 according to this embodiment. Then, the insertion wall 361 of the lid 360 is inserted into the groove portion 352 charged with the sealing material. Here, when the space is formed in both between the outer peripheral wall 354 and the insertion wall 361 and between the inner peripheral wall 355 and the insertion wall 361, the amount of the sealing material flowing toward the outer peripheral wall 354 and the amount of the sealing material flowing toward the inner peripheral wall 355 become different depending on the insertion position and the insertion depth of the insertion wall 361 into the groove portion 352. That is, the amount of the sealing material flowing toward the outer peripheral wall 354 may be larger than the expected amount depending on the insertion position and the insertion depth of the insertion wall 361 into the groove portion 352.

At this time, as described above, in the housing 340 of the conventional brake fluid pressure control device 301, the length of the outer peripheral wall 354 in the first direction Y is not longer than the length of the inner peripheral wall 355 in the first direction Y. Therefore, in the conventional brake fluid pressure control device 301, if the amount of the sealing material flowing toward the outer peripheral wall 354 increases, the sealing material charged in the groove portion 352 may leak to the outside of the outer peripheral wall 354 (for example, a B part shown in FIG. 6). Therefore, in the conventional brake fluid pressure control device 301, a wall portion 362 which surrounds the outside of the outer peripheral wall 354 is provided to the lid in order to suppress the sealing material from leaking to the outside of the brake fluid pressure control device 301. Therefore, it is difficult to realize a decrease in size since the conventional brake fluid pressure control device 301 increases in size in the second direction X by the amount of the wall portion 362.

On the other hand, in the brake fluid pressure control device 1 according to this embodiment, as described above, the groove portion 52 of the main body portion 50 of the housing is formed such that the length of the outer peripheral wall 54 in the first direction Y is longer than the length of the inner peripheral wall 55 in the first direction Y. Therefore, in the brake fluid pressure control device 1 according to this embodiment, even when the amount of the sealing material flowing toward the outer peripheral wall 54 increases, the sealing material leaking to the outside of the outer peripheral wall 354 in the conventional brake fluid pressure control device 301 can be stored between the insertion wall 61 and the outer peripheral wall 54 of the groove portion 52. That is, in the brake fluid pressure control device 1 according to this embodiment, it is possible to suppress the sealing material from leaking to the outside of the brake fluid pressure control device 1 even when the wall portion 362 of the lid 360 of the conventional brake fluid pressure control device 301 is not provided. Therefore, the brake fluid pressure control device 1 according to this embodiment can suppress the sealing material from leaking to the outside of the brake fluid pressure control device 1 while suppressing an increase in size in the second direction X.

Here, conventionally, the brake fluid pressure control device is formed such that the housing accommodates the coil for driving the hydraulic pressure adjusting valve and the circuit board controlling the energization of the coil. Therefore, the housing of the brake fluid pressure control device originally requires a certain length in the direction in which the main body portion and the lid face each other. Thus, even when the length of the outer peripheral wall 54 in the first direction Y is longer than the length of the inner peripheral wall 55 in the first direction Y as in this embodiment, the brake fluid pressure control device 1 according to this embodiment does not increase in size in the first direction Y compared to the conventional brake fluid pressure control device.

Therefore, the brake fluid pressure control device 1 according to this embodiment can be decreased in size compared to the conventional brake fluid pressure control device which improves the airtightness between the main body portion and the lid of the housing and suppresses the sealing material from leaking to the outside of the brake fluid pressure control device.

An effect of the brake fluid pressure control device according to this embodiment will be described.

The brake fluid pressure control device 1 according to this embodiment includes the base body 10 to which the flow path 13 for the brake fluid is formed, the coils 70 which are erected on the base body 10 and drives the hydraulic pressure adjusting valve 20 opening and closing the flow path 13, the circuit board 31 which controls the energization of the coils 70, and the housing which is connected to the base body 10 and covers the coil 70 and the circuit board 31. The housing 40 includes the main body portion 50 which is connected to the base body 10 and is provided with the opening portion 51 and the lid 60 which covers the opening portion 51 and is attached to the main body portion 50. The main body portion 50 includes the groove portion 52 which is formed on the outer peripheral side of the opening portion 51 to open toward the lid 60. The lid 60 includes the insertion wall 61 which extends toward the main body portion 50 and is inserted into the groove portion 52. Then, the brake fluid pressure control device 1 is formed such that a gap between the groove portion 52 and the insertion wall 61 is sealed by the sealing material and the brake fluid pressure control device 1 is, for example, a brake fluid pressure control device for a saddle-type vehicle which is the bicycle 200. The groove portion 52 includes the bottom portion 53, the outer peripheral wall 54 which constitutes the outer peripheral wall of the groove portion 52 and extends from the bottom portion 53 toward the lid 60, and the inner peripheral wall which constitutes the inner peripheral wall of the groove portion 52 and extends from the bottom portion 53 toward the lid 60. Further, the space 80 for storing the sealing material is formed between the outer peripheral wall 54 and the insertion wall 61 and between the inner peripheral wall 55 and the insertion wall 61. Further, the length of the outer peripheral wall 54 in the first direction Y is longer than the length of the inner peripheral wall 55 in the first direction Y.

In the brake fluid pressure control device 1 according to this embodiment, the length of the outer peripheral wall 54 in the first direction Y is longer than the length of the inner peripheral wall 55 in the first direction Y. Therefore, the brake fluid pressure control device 1 according to this embodiment can suppress the sealing material from leaking to the outside of the brake fluid pressure control device 1 while suppressing an increase in size in the second direction X as described above. Further, the brake fluid pressure control device 1 according to this embodiment does not increase in size in the first direction Y compared to the conventional brake fluid pressure control device as described above. Therefore, the brake fluid pressure control device 1 according to this embodiment can be decreased in size compared to the conventional brake fluid pressure control device which improves the airtightness between the main body portion and the lid of the housing and suppresses the sealing material from leaking to the outside of the brake fluid pressure control device.

Further, the brake fluid pressure control device 1 according to this embodiment does not require the wall portion 362 of the lid 360 of the conventional brake fluid pressure control device 301 as described above. This wall portion 362 may hinder the improvement of the aesthetic appearance of the brake fluid pressure control device 301. That is, the brake fluid pressure control device 1 according to this embodiment can improve the aesthetic appearance compared to the conventional brake fluid pressure control device 301 including the wall portion 362.

Preferably, the brake fluid pressure control device 1 according to this embodiment is mounted on a saddle-type vehicle such as the bicycle 200. Compared to the vehicle such as a four-wheeled vehicle, the saddle-type vehicle has a lower degree of freedom in component layout and a lower degree of freedom in installing the brake fluid pressure control device. Therefore, the brake fluid pressure control device 1 according to this embodiment which can be decreased in size compared to the conventional one is suitable when installing the brake fluid pressure control device improving the airtightness between the lid and the main body portion of the housing and suppressing the sealing material from leaking to the outside of the brake fluid pressure control device in the saddle-type vehicle. Further, in the saddle-type vehicle, the brake fluid pressure control device is easier to see from the outside than in the vehicle such as a four-wheeled vehicle. Therefore, since the brake fluid pressure control device 1 according to this embodiment capable of suppressing the sealing material from leaking to the outside of the brake fluid pressure control device is installed in the saddle-type vehicle, it is possible to suppress deterioration of the aesthetic appearance of the saddle-type vehicle.

MODIFIED EXAMPLE

FIG. 7 is a main cross-sectional view showing the periphery of a groove portion of a main body portion of a housing of a modified example of the brake fluid pressure control device according to the embodiment of the invention. FIG. 7 is a view in which the modified example of the brake fluid pressure control device 1 is cut in the same cross-section as that of FIG. 3 and the same position as that of the A part of FIG. 3 is observed. Therefore, in FIG. 7, the left side of the paper is the outside of the housing 40 and the right side of the paper is the inside of the housing That is, in FIG. 7, the left side of the paper is the outside of the modified example of the brake fluid pressure control device 1.

In FIGS. 1 to 5, the configuration between the insertion wall 61 and the bottom portion 53 of the groove portion 52 is not particularly mentioned. For example, the configuration between the insertion wall 61 and the bottom portion 53 of the groove portion 52 shown in FIG. 7 is preferable. Here, in the description of the configuration between the bottom portion 53 of the groove portion 52 and the insertion wall 61, a center line 64, an outer peripheral line 65, an inner peripheral line 66, an outer peripheral region 81, and an inner peripheral region 82 in the cross-section shown in FIG. 7 are defined as below. In a root portion 63 of an insertion region 62 located on the inside of the groove portion 52 of the insertion wall 61, a straight line passing through the center point in the second direction X and parallel to the first direction Y is set as the center line 64. A straight line passing through the point on the side closest to the outer peripheral wall 54 in the insertion region 62 and parallel to the first direction Y is set as the outer peripheral line 65. A straight line passing through the point on the side closest to the inner peripheral wall 55 in the insertion region 62 and parallel to the first direction Y is set as the inner peripheral line 66. A region surrounded by the insertion wall 61, the center line 64, the outer peripheral line 65, and the bottom portion 53 of the groove portion 52 is set as the outer peripheral region 81. A region surrounded by the insertion wall 61, the center line 64, the inner peripheral line 66, and the bottom portion 53 of the groove portion 52 is set as the inner peripheral region 82.

When the outer peripheral region 81 and the inner peripheral region 82 are defined in this way, the area of the inner peripheral region 82 is preferably larger than the area of the outer peripheral region 81. Additionally, in FIG. 7, the area of the inner peripheral region 82 is larger than the area of the outer peripheral region 81 due to the insertion region 62 formed in an asymmetrical shape with the center line 64 as the axis of symmetry. Since the area of the inner peripheral region 82 is larger than the area of the outer peripheral region 81, the pressure generated in the sealing material existing in the outer peripheral region 81 becomes larger than the pressure generated in the sealing material existing in the inner peripheral region 82 when the insertion wall 61 of the lid 60 is inserted into the groove portion 52 charged with the sealing material. As a result, the sealing material in the groove portion 52 is more likely to flow toward the inner peripheral wall 55 compared to the outer peripheral wall 54 when the insertion wall 61 is inserted into the groove portion 52 charged with the sealing material. Therefore, since the area of the inner peripheral region 82 is larger than the area of the outer peripheral region 81, it is possible to further suppress the sealing material from leaking to the outside of the brake fluid pressure control device 1.

Additionally, in the modified example of the brake fluid pressure control device 1 shown in FIG. 7, the area of the inner peripheral region 82 is larger than the area of the outer peripheral region 81 due to an inclined portion provided as a flat surface on the inner peripheral portion of the tip of the insertion wall 61. However, this shape is just an example.

FIGS. 8 and 9 are views showing an example of another shape of the insertion wall in the modified example of the brake fluid pressure control device according to the embodiment of the invention. These drawings are views in which the modified example of the brake fluid pressure control device 1 is cut in the same cross-section as that of FIG. 3 and the same position as that of the A part of FIG. 3 is observed. Therefore, in these drawings, the left side of the paper is the outside of the housing 40 and the right side of the paper is the inside of the housing 40. That is, in these drawings, the left side of the paper is the outside of the modified example of the brake fluid pressure control device 1.

For example, as shown in FIG. 8, even when an inclined portion is formed as a curved surface on the inner peripheral portion of the tip of the insertion wall 61, the insertion region 62 can be formed in an asymmetrical shape with the center line 64 as the axis of symmetry and the area of the inner peripheral region 82 can be larger than the area of the outer peripheral region 81. Additionally, in FIG. 8, the inclined portion is formed as a curved surface to protrude toward the bottom portion 53 of the groove portion 52, but the inclined portion may be formed as a curved surface to protrude toward the side opposite to the bottom portion 53 of the groove portion 52. Even when the inclined portion is formed in this way, the insertion region 62 can be formed in an asymmetrical shape with the center line 64 as the axis of symmetry and the area of the inner peripheral region 82 can be larger than the area of the outer peripheral region 81. Further, for example, as shown in FIG. 9, even when at least one step portion is formed on the inner peripheral portion of the tip of the insertion wall 61, the insertion region 62 can be formed in an asymmetrical shape with the center line 64 as the axis of symmetry and the area of the inner peripheral region 82 can be larger than the area of the outer peripheral region 81. If the area of the inner peripheral region 82 is larger than the area of the outer peripheral region 81 regardless of the shape of the inner peripheral portion of the tip of the insertion wall 61, the sealing material in the groove portion 52 easily flows toward the inner peripheral wall 55 when the insertion wall 61 is inserted into the groove portion 52 charged with the sealing material. Accordingly, it is possible to further suppress the sealing material from leaking to the outside of the brake fluid pressure control device 1.

FIG. 10 is a main cross-sectional view showing the periphery of a groove portion of a main body portion of a housing in a modified example of the brake fluid pressure control device according to the embodiment of the invention. FIG. 10 is a view in which the modified example of the brake fluid pressure control device 1 is cut in the same cross-section as that of FIG. 3 and the same position as that of the A part of FIG. 3 is observed. Therefore, in FIG. 10, the left side of the paper is the outside of the housing 40 and the right side of the paper is the inside of the housing That is, in FIG. 10, the left side of the paper is the outside of the modified example of the brake fluid pressure control device 1.

Further, FIG. 11 is a view in which the lid of the housing of the brake hydraulic pressure control device shown in FIG. 10 is viewed from the main body portion side of the housing. Additionally, in FIG. 11, the shape of the opening portion of the groove portion 52 of the main body portion 50 is indicated by a two-dotted chain line which is an imaginary line.

The brake fluid pressure control device 1 preferably includes at least one of a first positioning portion 91 and a second positioning portion 92.

The first positioning portion 91 is for positioning the main body portion 50 and the lid 60 of the housing 40 in the direction perpendicular to the first direction Y. When a space is formed both between the outer peripheral wall 54 and the insertion wall 61 and between the inner peripheral wall 55 and the insertion wall 61 when inserting the insertion wall 61 into the groove portion 52 charged with the sealing material, the amount of the sealing material flowing toward the outer peripheral wall 54 and the amount of the sealing material flowing toward the inner peripheral wall 55 vary when the insertion position of the insertion wall 61 to the groove portion 52 varies. Here, since the insertion position of the insertion wall 61 to the groove portion 52 is stable due to the first positioning portion 91, the amount of the sealing material flowing toward the outer peripheral wall