JP2023043896A - Side stand switch and side stand device - Google Patents

Abstract

To provide a side stand switch that is able to appropriately prevent coming-off of a sealing member without excessively increasing a manufacturing load.SOLUTION: A side stand switch includes: a rotor portion having a rotating body that rotates in conjunction with a side stand; a case portion having a through-hole through which the rotating body is inserted; a sealing member having a cylindrical body composed of a rigid member extended in a rotating-shaft direction of the rotating body and a sealing portion fixed to the cylindrical body and composed of an elastic member, wherein the sealing member is disposed between the rotating body and the through-hole by being press-fitted. In the side stand switch, the sealing portion has a first elastic portion that is formed with a thickness equal to that of an outer side of the cylindrical body and that is in firm contact with an inner peripheral surface of the through-hole, and a second elastic portion that is provided on an inner side of the cylindrical body and slidably opposite to an outer peripheral surface of the rotating body, the inner peripheral surface of the through-hole has, at a position opposite to the cylindrical body, an airtight portion and a coming-off prevention portion located further inside the case portion than the airtight portion, the first elastic portion disposed opposite to the airtight portion is compressed in an airtight manner, and the through-hole increases in diameter in the coming-off prevention portion.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to a side stand switch and a side stand device, and more particularly to a side stand switch and side stand device for detecting the position of a side stand bar that supports a two-wheeled vehicle such as a motorcycle.

Generally, a motorcycle or the like is provided with a side stand device that supports the vehicle body in an upright state when the vehicle is parked. This side stand device is configured by rotatably attaching a side stand bar to a bracket provided on a vehicle body frame via a pivot bolt, and attaching a side stand switch to the pivot bolt via a fixing bolt. The side stand switch has a case portion provided with a fixed contact and a rotor portion provided with a movable contact. When the rotor portion is rotated together with the side stand bar, the rotating position of the side stand bar is detected. there is

Conventionally, as a side stand switch for detecting the position of a side stand bar, there has been known a side stand switch that has a torque receiving member whose rotor portion is engaged with the side stand bar via a pin and receives torque generated by tightening of a fastening member (for example, Patent Reference 1). As shown in FIG. 8, in this side stand switch 101, the rotation of the case portion 108 is regulated by a regulating pin 107 projecting from a bracket, and an engagement pin 111 projecting from a rotor body 109 is formed on the side stand bar 103. It is engaged with the joint hole 93 . In this state, side stand switch 101 is fixed to pivot bolt 104 by tightening fixing bolt 106 inserted through the central openings of case portion 108 and rotor body 109 into screw hole 112 in the head of pivot bolt 104 . When the side stand bar 103 rotates, the rotor body 109 rotates via the engaging pin 111, and the rotational position of the side stand bar 103 is detected.

A torque receiving member 110 is provided between the rotor body 109 and the fixing bolt 106 and is frictionally engaged with the rotor body 109 in a relatively rotatable state. Also, the frictional force of the engaging surface of the torque receiving member 110 with the rotor body 109 is smaller than the frictional force generated by tightening the fixing bolt 106 . With this configuration, rotor body 109 and torque receiving member 110 rotate relative to each other only when torque of a certain level or more is transmitted to rotor body 109 .

As described above, the side stand switch 101 is finally fixed to the pivot bolt 104 by tightening the fixing bolt 106 into the screw hole 112, so the fixing bolt 106 is not attached during distribution and storage. Therefore, the sealing member 120 positioned between the case portion 108 and the rotor body 109 is appropriately restricted from coming off (moving toward Z1 in the Z1-Z2 direction) even when the fixing bolt 106 is not attached. It is necessary.

In particular, in the side stand switch 101 disclosed in Patent Document 1, a seal member 130 is further provided on the Z1-Z2 direction Z2 side, and this seal member 130 is removed ( Z1-Z2 direction Z2 side movement) is completely restricted. Therefore, when the environmental temperature during distribution and storage is high, the volume of the closed space (airtight space) formed between the case portion 108 and the rotor body 109 and the two seal members 120 and 130 expands. An external force in the direction of removal (the Z1-Z2 direction Z1 side) is likely to be applied to the seal member 120 whose removal is not restricted.

In a conventional sealing member, as shown in FIG. 5 of Patent Document 2, for example, a projecting portion is partially provided in an elastically deformable sealing portion, and a groove is provided on the housing side with which the sealing member abuts to form a projecting portion. was inserted into the groove to prevent it from coming off.

JP 2010-274902 A Japanese Patent No. 4082035

However, in the structure disclosed in Patent Document 2, when inserting the seal member into the housing, the projection passes through the front portion of the groove before reaching the groove, so the projection passes through this front portion. What you can do is needed. As a result of securing the amount of elastic deformation for securing the insertability of the protrusion in the front portion, the amount of elastic compression of the protrusion in the groove is reduced. This causes a decrease in airtightness. Further, if the projection is not securely fitted into the groove, the elastic recovery force of the projection will be the force that pulls the seal member out of the housing. Therefore, it is necessary to strictly manage the fitting between the groove and the projection. Furthermore, forming a groove in the housing requires additional processing in the case of machining, and requires the preparation of a mold with a nested structure in the case of molding. decrease in

SUMMARY OF THE INVENTION An object of the present invention is to provide a side stand switch and a side stand device that can properly prevent a seal member from coming off without excessively increasing the manufacturing load.

A side stand switch according to an aspect of the present invention provided to solve the above problems includes a rotor portion having a rotating body that rotates in conjunction with a side stand; a case portion having a through hole through which the rotating body is inserted; a seal member having a cylindrical body made of a rigid member extending in the direction of the rotational axis of the body and a seal portion made of an elastic member fixed to the cylindrical body; and a position detection section for detecting the rotational position of the rotating body. , wherein the sealing member is press-fitted between the rotating body and the through hole, wherein the sealing part is formed on the outer side of the cylindrical body with the same thickness and is formed on the inner peripheral surface of the through hole. and a second elastic portion provided inside the cylindrical body and slidably opposed to the outer peripheral surface of the rotating body, and the inner peripheral surface of the through hole is the cylindrical an airtight portion and a retaining portion located inside the case portion relative to the airtight portion at a position facing the shaped body, and the first elastic portion disposed facing the airtight portion is compressed to be airtight, The diameter of the through hole increases at the retainer.

When a retaining portion with a partially enlarged diameter is provided on the outer peripheral surface of the sealing member (when a convex retaining portion is provided), when the sealing member is press-fitted into the through hole, the diameter of the portion where the retaining portion is located expands. A portion without a retainer part tries to swell by the amount of compression of a certain portion.

On the other hand, in the structure of the side stand switch according to this aspect, since the thickness of the first elastic portion is the same, the first elastic portion facing the airtight portion is evenly compressed. Therefore, the degree of airtightness brought about by the compression of the first elastic portion is uniform in the circumferential direction of the through hole, and the stability of the airtightness can be enhanced. In addition, the seal member can be easily press-fitted and the degree of airtightness can be improved more easily than in the case where the seal member is partially expanded in diameter to serve as the retaining portion. The enlarged diameter portion of the sealing portion not only becomes an obstacle during press-fitting, but as a result of prioritizing that this enlarged diameter portion can pass through the airtight portion, the press-fitting clearance of the airtight portion becomes relatively large, and the degree of airtightness is reduced. decreases relatively. Furthermore, if the through hole is provided with an enlarged diameter portion corresponding to the enlarged diameter portion of the seal member, it is necessary to sufficiently manage the fitting between them so as not to affect the airtightness after press-fitting.

Since the diameter of the through-hole is enlarged at the retaining portion located on the tip side in the press-fitting direction, the first elastic portion that has been press-fitted and passed through the airtight portion is pressed against the through-hole while being relatively expanded by the retaining portion. do. Therefore, when an external force acts to remove (pull out) the seal member in the direction of the rotation axis after press-fitting, the through-hole is contracted in the direction in which the seal member is pulled out, and thus presses against the retaining portion of the first elastic portion. The seal member does not actually move out unless the part is further compressed. That is, the compression resistance of the portion of the first elastic portion that is in pressure contact with the retaining portion functions as a resistance force against the external force. Therefore, in the side stand switch according to this aspect, the seal member is less likely to come off even when an external force is applied. Further, the shape provided on the through-hole side of the case portion is easier to process than, for example, the groove portion of Patent Document 2, so the easiness of manufacture is unlikely to decrease.

In the side stand switch described above, it is preferable that the enlarged diameter width D of the through hole in the retainer portion satisfies the following formula (1).
D≧T×0.005 (1)
Here, T is the clearance between the through-hole and the cylindrical body in the airtight portion.

The expanded width D means the width in which the radius of the through-hole widens in the direction orthogonal to the direction of the rotation axis in the cross section on the plane including the rotation axis. Therefore, the width of the first elastic portion that presses against the inner surface of the through-hole in the retaining portion, that is, the clearance T1 between the through-hole and the cylindrical body in the retaining portion is the clearance between the through-hole and the cylindrical body in the airtight portion. It is represented by the following formula (2) using T and the diameter expansion width D.
T1=D+T (2)
is represented by
If the clearance T1 is greater than the clearance T by 0.5% or more, the compression resistance generated when the first elastic portion located in the retainer portion moves toward the airtight portion is sufficiently high, and the retainer functions properly as a retainer. .

In the above side stand switch, it is preferable that the retainer is provided along the entire circumference of the through hole. Since the retaining portion is provided along the entire circumference, the retaining function can be enhanced without increasing the diameter expansion width D. The retaining portions may be partially provided at equal intervals in the circumferential direction over the entire circumference of the through hole.

The side stand switch preferably further has a transition portion between the airtight portion and the retainer portion, in which the diameter of the through hole changes. In this case, the transition portion has a length L is preferably not more than twice the diameter expansion width D of the through hole.

Since the length L of the transition portion is not more than twice the diameter expansion width D, compression resistance of the elastic member is quickly generated when a pull-out force is applied to the seal member, and the retaining function is properly exhibited. The shorter the length L of the transition portion, the more efficiently the compression resistance can be increased. In some cases, it is preferable that L is up to about 1/2 of the diameter expansion width D. From the viewpoint of facilitating the formation of the transition portion, it may be preferable for the transition portion to be a tapered portion in which the diameter of the through hole changes continuously.

The above-described side stand switch may further include a fixed seal member that is in airtight pressure contact with the through hole at a position spaced apart from the seal member along the direction of the rotation axis. In this case, it is preferable that the case portion is provided with a support member that restricts movement of the stationary seal member away from the seal member along the direction of the rotation axis. Even if the pressure in the airtight space rises, the portion of the first elastic portion facing the retainer can be preferentially elastically deformed, thereby suppressing an excessive increase in the pressure in the airtight space.

A side stand device of the present invention includes a side stand bar that supports a vehicle body in an upright state, a bracket, a pivot bolt that rotatably attaches the side stand bar to the bracket, a side stand switch according to one aspect of the present invention, a fixing bolt for tightening the side stand switch to the pivot bolt.

ADVANTAGE OF THE INVENTION According to this invention, the side stand switch and side stand apparatus provided with the said side stand switch which can implement|achieve appropriately retention of a sealing member without increasing the manufacturing load excessively are provided.

It is a perspective view showing an embodiment of a side stand device provided with a side stand switch according to one embodiment of the present invention. 1 is an exploded perspective view showing an embodiment of a side stand device having a side stand switch according to one embodiment of the present invention; FIG. 1 is a partial cross-sectional view showing an embodiment of a side stand switch according to one embodiment of the present invention; FIG. 4 is a partially enlarged view of FIG. 3; FIG. It is a figure which shows the state before attachment of the side stand switch which concerns on one Embodiment of this invention. (a) A conceptual diagram for explaining the function of the side stand switch according to one embodiment of the present invention, (b) a partial enlarged view of FIG. 6 (a). FIG. 5 is a partial cross-sectional view illustrating the structure of a through hole in the case of a side stand switch according to another embodiment of the invention; FIG. 10 is a partial cross-sectional view of a side stand device having a conventional side stand switch;

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a stand position detection device according to the present invention will be described below with reference to the accompanying drawings. The same members are denoted by the same numbers in each drawing, and descriptions thereof are omitted as appropriate. First, the overall configuration of the side stand device 1 will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view of a side stand device 1 having a side stand switch 5 according to an embodiment of the invention. FIG. 2 is an exploded perspective view of the side stand device 1 according to the embodiment of the invention.

As shown in FIGS. 1 and 2, a side stand device 1 supports a motorcycle in an upright state when it is parked. A side stand bar 3 is attached so as to be rotatable, that is, rotatable within a predetermined range. Further, the side stand device 1 is provided with a side stand switch 5 via a fixing bolt 6 on the pivot bolt 4 , and the position of the side stand bar 3 is detected by the side stand switch 5 .

The bracket 2 includes a plate-like portion 11 and a through pin 12 that penetrates through the plate-like portion 11 in the thickness direction and is fixed. A shaft hole 13 is formed through the plate-like portion 11 in the thickness direction (Z1-Z2 direction) at the mounting position of the side stand bar 3 . One end side (Z1-Z2 direction Z1 side) of the through pin 12 functions as a positioning pin for positioning the side stand switch 5, and the other end side (Z1-Z2 direction Z2 side) of the through pin 12 functions as a return spring (not shown). It functions as a locking pin that is locked to the return spring).

The side stand bar 3 is attached to the bracket 2 by a pivot bolt 4 and is rotatable about the pivot bolt 4 between a standing position grounded on the ground and a retracted position substantially horizontal with respect to the ground. . A pair of bifurcated connecting portions 15 and 16 are provided on the base end side of the side stand bar 3 so as to sandwich the plate-like portion 11 therebetween. 17 and 18 are formed. An engagement hole 19 that engages with the rotor portion 32 of the side stand switch 5 is formed through the vicinity of the shaft hole 17 of one of the connecting portions 15 .

The pivot bolt 4 is inserted through the shaft holes 17 and 18 of the pair of connecting portions 15 and 16 and the shaft hole 13 of the bracket 2 with the bracket 2 sandwiched between the pair of connecting portions 15 and 16 . At this time, the intermediate portion 23 of the pivot bolt 4 is inserted through the shaft hole 17 of the connecting portion 15 on one side (Z1-Z2 direction Z1 side) and the shaft hole 13 of the bracket 2, and the threaded portion 24 on the tip side is inserted into the other (Z1-Z2 direction Z1 side). Z1-Z2 direction (Z2 side) is inserted into shaft hole 18 of connecting portion 16, and a part thereof is exposed to the outside.

The pivot bolt 4 is fixed to the pair of connecting portions 15 and 16 by screwing the fixing nut 7 onto the exposed screw portion 24 and tightening the fixing nut 7 . This causes the side stand bar 3 to rotate together with the pivot bolt 4 relative to the bracket 2 . A screw hole 22 into which the fixing bolt 6 is screwed is formed in the head 21 of the pivot bolt 4 .

The side stand switch 5 detects whether the side stand bar 3 is positioned on the standing position side or the retracted position side. is attached to the head 21 of the pivot bolt 4 by A holding portion 34 and a coupler portion 35 are formed in the case portion 31 of the side stand switch 5 . The side stand switch 5 is positioned by sandwiching one end side (Z1-Z2 direction Z1 side) of the through pin 12 with the holding portion 34, and a signal corresponding to the position of the side stand bar 3 is output from the coupler portion 35. A detailed configuration of the side stand switch 5 will be described later.

The fixing bolt 6 is inserted through the side stand switch 5 and tightened while being screwed into the screw hole 22 of the pivot bolt 4 , thereby fixing the side stand switch 5 to the pivot bolt 4 . The fixing bolt 6 has a circular flange portion 27 on its head, and the flange portion 27 protects the annular sealing member 41 (see FIG. 3, etc.) from flying stones and the like, and presses the side stand switch 5 stably. ing.

Next, the detailed configuration of the side stand switch 5 will be described with reference to FIGS. 3 and 4. FIG. FIG. 3 is a partial sectional view showing an embodiment of the side stand switch 5 according to the invention. FIG. 4 is an enlarged view of the portion where the seal member of FIG. 3 is located.

As shown in FIG. 3, the side stand switch 5 includes a case portion 31 whose rotation is restricted by the penetrating pin 12, and a rotor portion 32 that is housed inside the case portion 31 in a rotatable state. It is The case portion 31 is molded of synthetic resin or the like, and has a surface (lower surface) on the side of the bracket 2 (the Z2 side in the Z1-Z2 direction) (hereinafter referred to as the case portion 31 with the bracket 2 side as the bottom and the opposite side of the bracket 2 as the top). ), and the holding portion 34 (see FIGS. 1 and 2) provided on the side of the case main portion 33 .

The case main portion 33 has a through hole 200, and a circular opening 37 is formed in the upper wall of the through hole 200 (the wall on the Z1-Z2 direction Z1 side). A ring-shaped seal member 41 is provided in the circular opening 37 to seal the gap between the case main portion 33 and the rotor portion 32 . Further, at the lower part (Z1-Z2 direction Z2 side) of the through-hole 200 of the case main part 33, a ring-shaped ring sealing the gap between the lower part (Z1-Z2 direction Z2 side) of the rotor part 32 and the case main part 33 is provided. A stationary seal member 42 is provided. The case portion 31 has a crimped portion 311 protruding toward the rotating shaft at its lower end (Z1-Z2 direction Z2 side end). movement is restricted. That is, the side stand switch 5 is provided with a secure retaining mechanism for the stationary seal member 42 .

A fixed contact 43 is provided around the circular opening 37 on the upper wall of the case main portion 33 , and the fixed contact 43 is exposed inside the case main portion 33 . Although not shown in detail, in this embodiment, the fixed contact 43 is configured by arranging an arc-shaped common fixed contact and two individual fixed contacts on the same circumference. For example, when the side stand bar 3 is in the retracted position, the common fixed contact and one of the individual fixed contacts are electrically connected by the movable contact 54, which will be described later. The common fixed contact and the other individual fixed contact are electrically connected by means of 54 . With such a configuration, the drivable state of the motorcycle and the parked state of the motorcycle are detected. By making it possible to detect the state of the side stand bar 3, it is used for vehicle body control such as preventing the vehicle from traveling while the side stand bar 3 is in the upright state.

The rotor portion 32 is composed of a rotating body (rotor body 51) rotatably supported by the case portion 31, and a torque receiving member 52 frictionally engaged with an insertion hole 56 in the central portion of the rotor body 51. It is The rotor body 51 is formed of a synthetic resin such as polybutylene terephthalate (PBT), except for the torque receiving member 52 and the engaging pin 63, and is a ring having a cylindrical insertion hole 56 penetrating in the rotation axis direction at the central portion. an annular upper shaft portion 58 projecting upward from the opening edge of the disk portion 57; and an annular lower shaft portion 59 projecting downward on the outer peripheral side of the disk portion 57. .

A semicircular movable contact 54 is provided on the upper surface of the disc portion 57 . The movable contact 54 is configured to be rotatable together with the rotor main body 51 while being urged toward the fixed contact 43 by the coil spring 53 from the rear surface.

The upper shaft portion 58 is formed in a hollow cylindrical shape and is rotatably supported by the seal member 41 . The lower shaft portion 59 accommodates the head portion 21 of the pivot bolt 4 inside and is rotatably supported by the stationary seal member 42 . In this way, the rotor main body 51 is rotatably supported by the seal member 41 and the fixed seal member 42 at both upper and lower end sides, so that it is stably held within the case portion 31 . That is, the seal member 41 and the fixed seal member 42 are press-fitted between the upper shaft portion 58 and the lower shaft portion 59 and the rotor main body 51 , and the rotor main body 51 is moved by the elastic force of the seal member 41 and the fixed seal member 42 . It is held without falling out of the case portion 31 . As described above, when the side stand switch 5 is attached to the motorcycle, the seal member 41 is restricted from moving upward (Z1-Z2 direction Z1 side) by the flange portion 27 of the fixing bolt 6 . A crimped portion 311 is provided for the stationary seal member 42 to prevent the stationary seal member 42 from coming off. However, the sealing member 41 is not provided with a drop-off prevention structure similar to the crimped portion 311 . This is because the upper surface of the seal member 41 is pressed by the flange portion 27 of the fixing bolt 6 as described above. If a fall prevention structure similar to the crimped portion 311 is provided, there is a risk that the mounting of the fixing bolt 6 will be tilted or that the fall prevention structure will be damaged by tightening, resulting in other problems.

The lower shaft portion 59 is formed with an engagement pin 63 protruding downward (Z1-Z2 direction Z2 side) from the lower end surface (Z1-Z2 direction Z2 side end surface). It is inserted through the formed engagement hole 19 . With this configuration, the rotor body 51 is engaged with the side stand bar 3 via the engaging pin 63 and is rotated together with the side stand bar 3 .

The torque receiving member 52 is formed in a hollow cylindrical shape from metal such as carbon steel for machine structural use (S45C). A central portion of the torque receiving member 52 is an insertion hole 71 through which the shaft portion of the fixing bolt 6 is inserted. In this case, the upper end surface 81 (Z1-Z2 direction Z1 side end surface) of the torque receiving member 52 abuts against the back surface of the flange portion 27 of the fixing bolt 6, and the lower end surface (Z1-Z2 direction Z2 side end surface) is the pivot bolt. 4 (Z1-Z2 direction Z1 side surface).

In the side stand device 1 configured as described above, when the motorcycle is driven, the side stand bar 3 is pushed up by the driver, and the side stand bar 3 rotates about the pivot bolt 4 from the upright position to the retracted position. be done. At this time, the rotor main body 51 rotates together with the side stand bar 3 via the engaging pin 63, and the contact portion of the movable contact 54 provided on the rotor main body 51 is connected to the common fixed contact of the fixed contact 43 and one of the individual fixed contacts. and conduct. As a result, the side stand switch 5 detects that the side stand bar 3 is in the retracted position. Thus, in the side stand switch 5 according to this embodiment, the position detection section includes the fixed contact 43 and the movable contact 54 .

On the other hand, when the motorcycle is parked, the side stand bar 3 is pushed down by the driver, and the side stand bar 3 is pivoted about the pivot bolt 4 from the storage position to the upright position. At this time, the rotor main body 51 rotates together with the side stand bar 3 via the engaging pin 63, and the contact portion of the movable contact 54 provided on the rotor main body 51 is connected to the common fixed contact of the fixed contact 43 and the other individual fixed contact. and conduct. As a result, the side stand switch 5 detects that the side stand bar 3 is positioned at the upright position.

As described above, the state in which the fixed contact 43 is electrically connected via the movable contact 54 corresponding to the rotation of the rotor body 51 that rotates in synchronism with the side stand bar 3 and the state in which the stationary contact 43 is electrically connected Toggles between states that are not in a state. That is, the side stand switch 5 detects whether the side stand bar 3 is in the retracted position or the upright position by switching the electrical connection state between the movable contact 54 and the fixed contact 43 .

As shown in FIG. 4, the sealing member 41 includes a tubular body 210 made of a rigid member extending in the rotation axis direction (Z1-Z2 direction) of the rotor main body 51, which is a rotating body, and a tubular body 210 fixed to the tubular body 210. and a sealing portion 220 made of an elastic member. The cylindrical body 210 extends outward from a cylindrical portion 212 extending in the direction of the rotation axis (Z1-Z2 direction) and one end of the cylindrical portion 212, specifically, the end on the Z1-Z1 side of the Z1-Z2 direction. A flange portion 211 is provided. The cylindrical portion 212 functions as a support for the seal portion 220, the flange portion 211 functions as a receiving portion for the Z1-Z2 direction of the fixing bolt 6 fastened to the pivot bolt 4, and the tip portion of the flange portion 211 ( In FIG. 4, the end on the X1-X2 direction X2 side) abuts against the case main portion 33 to function as a stopper in the rotation axis direction (Z1-Z2 direction).

The sealing portion 220 is formed on the outside of the cylindrical portion 212 of the cylindrical body 210 with the same thickness T0, and presses against the inner peripheral surface of the through hole 200 of the case main portion 33, and the cylindrical body 210. , and slidably opposed to the outer peripheral surface of the rotating body (rotor body 51). The second elastic portion 222 extends obliquely in the vertical direction in a fold shape. In FIG. 4, one fold extends in the Z1-Z2 direction Z1 side and the X1-X2 direction X1 side, and the other fold extends in the Z1-Z2 direction Z2 side and the X1-X2 direction X1 side. With such a configuration, it is realized that the tip portions of the folds press against the outer peripheral surface of the rotating body (rotor body 51) with a stronger force than the root portions. In addition, in FIG. 4, the root portion is configured so as not to come into contact with the outer peripheral surface of the rotating body (rotor body 51). With such a configuration, it is possible to prevent foreign matter from entering the inside of the case portion 31 without hindering the rotation of the rotating body (rotor main body 51). In the sealing portion 220 according to the present embodiment, the first elastic portion 221 and the second elastic portion 222 are connected on the Z1-Z2 direction Z2 side.

The inner peripheral surface of the through-hole 200 of the case main portion 33 is located at a position facing the cylindrical body 210 and inside the case main portion 33 (Z1-Z2 direction Z2 side) from the airtight portion 202 and the airtight portion 202. It has a retaining portion 203 to hold. In other words, the retaining portion 203 starts from the upper side (Z1-Z2 direction Z1 side) of the position facing the tip portion (Z1-Z2 direction Z2 side end) of the cylindrical portion 212 on the inner peripheral surface of the through hole 200. It extends downward (Z1-Z2 direction Z2 side). Therefore, the first elastic portion 221 is arranged in a compressed state between the retaining portion 203 and the cylindrical portion 212 .

The first elastic portion 221 arranged to face the airtight portion 202 is compressed so as to be airtight. Specifically, the first elastic portion 221 is compressed from the thickness T0 before compression to the clearance T between the through-hole 200 and the cylindrical body 210 in the airtight portion 202 . Therefore, of the internal space of the through-hole 200 , the space located inside the case main portion 33 (Z1-Z2 direction Z2 side) from the first elastic portion 221 arranged to face the airtight portion 202 becomes the airtight space 201 . .

The through-hole 200 has an enlarged diameter at a retaining portion 203 located on the tip side in the press-fitting direction (Z1-Z2 direction Z2 side). Therefore, the first elastic portion 221 that has been press-fitted and passed through the airtight portion 202 is pressed against the through-hole 200 while being relatively expanded by the retaining portion 203 . Specifically, the expanded diameter width D of the first elastic portion 221 in the retainer portion 203 is equal to the clearance T1 between the through hole 200 and the cylindrical body 210 in the retainer portion 203 and the through hole 200 in the airtight portion 202. The difference (T1-T) for the clearance T with the body 210.

Since the through-hole 200 is thus reduced in diameter in the direction in which the seal member 41 is pulled out, if an external force is generated in the direction of removing (pulling out) the seal member 41 in the rotation axis direction (Z1-Z2 direction Z1 side) after press-fitting, Unless the portion of the first elastic portion 221 that is in pressure contact with the retainer portion 203 is further compressed, the seal member 41 does not actually move in the detachment direction. That is, the compression resistance of the portion of the first elastic portion 221 that is in pressure contact with the retaining portion 203 functions as a resistance force against the external force. Therefore, in the side stand switch 5 according to this embodiment, the seal member 41 is difficult to come off even when an external force is applied.

FIG. 5 is a diagram showing a state before attachment of the side stand switch according to one embodiment of the present invention. FIG. 6(a) is a conceptual diagram illustrating the function of the side stand switch according to one embodiment of the present invention. FIG. 6(b) is a partially enlarged view of FIG. 6(a). As shown in FIG. 5, the fixing bolt 6 is not positioned on the Z1 side of the seal member 41 in the Z1-Z2 direction until the side stand switch 5 is attached to the motorcycle.

On the other hand, as shown in FIG. 6, the stationary seal member 42 is in airtight pressure contact with the through-hole 200 at a position spaced apart from the seal member 41 along the rotation axis direction (Z1-Z2 direction). For this reason, in the area surrounded by the broken line in FIG. , an airtight space 201 is formed.

Here, the stationary seal member 42 moves away from the seal member 41 (in the Z1-Z2 direction Z2 movement to the side) is restricted. Therefore, if the temperature of the airtight space 201 rises due to a rise in environmental temperature during storage or transportation of the side stand switch 5 before being attached to the motorcycle, even if the pressure in the airtight space 201 rises, the fixed seal member will 42 cannot move in the Z1-Z2 direction to the Z2 side.

On the other hand, as described above, in the side stand switch 5 before being attached to the motorcycle, the sealing member 41 does not have a positive member (fastened fixing bolt 6) that restricts movement in the Z1-Z2 direction to the Z1 side. . For this reason, if some kind of stopper is not provided, the sealing member 41 will move in the pulling direction (Z1-Z2 direction Z1 side) due to the pressure increase in the airtight space 201 . However, in the side stand switch 5 according to the present embodiment, the portion of the first elastic portion 221 facing the retainer portion 203 has a relatively low degree of compression, and the portion of the first elastic portion 221 facing the airtight portion 202 is compressed. There is room for compression to the same extent as Therefore, when the pressure in the airtight space 201 increases, the portion of the first elastic portion 221 facing the retaining portion 203 is preferentially elastically deformed and the airtight space 201 expands. Expansion is suppressed. FIG. 6B shows a state in which the portion of the first elastic portion 221 facing the retaining portion 203 is preferentially elastically deformed. It shows the outer shape of the front sealing member 41 on the Z1-Z2 direction Z2 side. As shown in FIG. 6B, the portion 223 of the first elastic portion 221 facing the airtight space 201 is preferentially compressed.

It is preferable that the diameter expansion width D of the through-hole 200 in the retaining portion 203 satisfies the following formula (1).
D≧T×0.005 (1)

As described above, the expanded width D is the direction (X1-X2 direction in FIG. 4) perpendicular to the direction of the rotation axis in the cross section (XZ plane in FIG. 4) of the through hole 200 on the plane including the rotation axis. The width of the spread of the radius. Therefore, the width of the first elastic portion 221 in pressure contact with the inner surface of the through hole 200 in the retaining portion 203, that is, the clearance T1 between the through hole 200 and the cylindrical body 210 (cylindrical portion 212) in the retaining portion 203 is airtight. Using the clearance T between the through-hole 200 and the cylindrical body 210 (cylindrical portion 212) in the portion 202 and the diameter expansion width D, the following equation (2) is obtained.
T1=D+T (2)
is represented by

If the clearance T1 is greater than the clearance T by 0.5% or more, the compression resistance generated when the first elastic portion 221 located in the retainer portion 203 moves toward the airtight portion 202 is sufficiently high, and is suitable as a retainer. function.
That is, it is preferable to satisfy the following formula (3).
T1/T≧1.005 (3)

From the above formulas (2) and (3), the following formula (4) is obtained, and the above formula (1) is derived.
(D+T)/T=D/T+1≧1.005 (4)

It should be noted that the clearance T is the degree of airtightness required, the compression ratio P (75% to 85% is exemplified) determined based on the material constituting the first elastic portion 221, etc., and the first elastic portion It is set so as to satisfy the relationship between the thickness T0 of 221 before compression and the following formula (5).
T=T0×P (5)

In the side stand switch 5 according to the present embodiment, the shape provided on the through hole 200 side of the case main portion 33 of the case portion 31 is easier to process than, for example, the groove portion of Patent Document 2, so the ease of manufacture is reduced. Hateful.

It is preferable that the retaining portion 203 is provided along the entire circumference of the through-hole 200 . Since the retaining portion 203 is provided over the entire circumference, it is possible to enhance the retaining function without increasing the diameter expansion width D. The retaining portion 203 may be partially provided in the circumferential direction of the through hole 200 . In this case, if the retaining portions 203 are provided at equal intervals in the circumferential direction over the entire circumference of the through-hole 200, the retaining function can be made uniform, which is preferable.

FIG. 7 is a partial cross-sectional view illustrating the structure of a through hole in the case of a side stand switch according to another embodiment of the invention. As shown in FIG. 7, a transition portion 204 in which the diameter of the through-hole 200 changes is provided between the airtight portion 202 and the retainer portion 203 from the viewpoint of shape workability of the through-hole 200. preferred from In this case, the length L of the transition portion 204 in the rotation axis direction (Z1-Z2 direction) is preferably twice or less than the expanded width D of the through hole 200 . Since the length L of the transition portion 204 is not more than twice the diameter expansion width D, compression resistance of the elastic member forming the first elastic portion 221 is rapidly generated when a pulling force is applied to the seal member 41. The retaining function is properly exhibited. The shorter the length L of the transition portion 204, the more efficiently the compression resistance can be increased. In some cases, it is preferable that the length L of 204 is up to about 1/2 of the diameter expansion width D. From the viewpoint of ease of forming the transition portion 204, it may be preferable for the transition portion 204 to be a tapered portion in which the diameter of the through hole 200 changes continuously.

In the above-described embodiments and specific examples, the fixing bolt 6 is used as an example of the fastening member, but the configuration is not limited to this. Any configuration may be used as long as the side stand switch 5 is attached by tightening. For example, the fastening member may be configured with a fixing nut.

The embodiment disclosed this time is an example in all respects and is not limited to this embodiment. The scope of the present invention is indicated by the scope of the claims rather than the description of the above-described embodiments only, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

As described above, the present invention has the effect of preventing the seal member 41 from coming off even before the fixing bolt 6 is tightened. It is useful for a side stand switch and a side stand device that detect the rotational position.

Reference Signs List 1: Side stand device 2: Bracket 3, 103: Side stand bar 4, 104: Pivot bolt 5, 101: Side stand switch 6, 106: Fixing bolt 7: Fixing nut 11: Plate-like portion 12: Through pins 13, 17, 18: Shaft holes 15, 16: connecting portion 19: engaging hole 21: head 22, 112: screw hole 23: intermediate portion 24: screw portion 27: flange portion 31, 108: case portion 32: rotor portion 33: case main portion 34: Holding portion 35: Coupler portion 37: Circular openings 41, 120, 130: Seal member 42: Fixed seal member 43: Fixed contact (a part of the position detection portion)
51, 109: rotor body (rotating body)
52, 110: Torque receiving member 53: Coil spring 54: Movable contact (part of position detection unit)
56, 71: insertion hole 57: disk portion 58: upper shaft portion 59: lower shaft portion 63, 111: engagement pin 81: upper end surface 93 of torque receiving member: engagement hole 107: regulation pin 200: through hole 201: Airtight space 202 : Airtight portion 203 : Retaining portion 204 : Transition portion 210 : Cylindrical body 211 : Flange portion 212 : Cylindrical portion 220 : Seal portion 221 : First elastic portion 222 : Second elastic portion 223 : First elastic portion Portions 311 and 131 facing the airtight space: Crimped portion D: Expanded diameter width P: Compression ratio T, T1: Clearance T0: Thickness

Claims (8)

a rotor portion having a rotating body that rotates in conjunction with the side stand;
a case portion having a through hole through which the rotating body is inserted;
a seal member having a cylindrical body made of a rigid member extending in the direction of the rotation axis of the rotating body and a seal portion fixed to the cylindrical body and made of an elastic member;
a position detection unit that detects a rotational position of the rotating body;
with
A side stand switch in which the sealing member is press-fitted between the rotating body and the through hole,
The sealing portion includes a first elastic portion formed on the outer side of the cylindrical body with the same thickness and in pressure contact with the inner peripheral surface of the through hole, and a first elastic portion provided on the inner side of the cylindrical body and on the outer periphery of the rotating body. a second elastic portion slidably facing the surface,
The inner peripheral surface of the through hole has an airtight portion at a position facing the cylindrical body, and a retaining portion located inside the case portion relative to the airtight portion,
The first elastic portion arranged to face the airtight portion is compressed so as to be airtight,
A side stand switch, wherein a diameter of the through-hole increases in the retainer. 2. The side stand switch according to claim 1, wherein an enlarged diameter width D of said through hole in said retaining portion satisfies the following formula (1).
D≧T×0.005 (1)
Here, T is the clearance between the through-hole and the cylindrical body in the airtight portion. 3. The side stand switch according to claim 1, wherein said retaining portion is provided along the entire circumference of said through hole. Between the airtight portion and the retaining portion, there is further provided a transition portion in which the diameter of the through hole changes, and the length L of the transition portion in the direction of the rotation axis is equal to the expanded width D of the through hole. 4. The sidestand switch according to any one of claims 1 to 3, which is less than or equal to twice the . 5. The side stand switch according to claim 4, wherein said transition portion comprises a tapered portion in which the diameter of said through hole changes continuously. further comprising a fixed seal member in airtight pressure contact with the through-hole at a position spaced apart from the seal member along the direction of the rotation axis;
6. The case part according to any one of claims 1 to 5, wherein the case part is provided with a support member that restricts movement of the stationary seal member away from the seal member along the direction of the rotation axis. side stand switch. a side stand bar that supports the vehicle body in an upright state;
a bracket;
a pivot bolt that rotatably attaches the side stand bar to the bracket;
A side stand switch according to any one of claims 1 to 6;
and a fixing bolt for fastening the side stand switch to the pivot bolt. 3 . The side stand device according to claim 1 , wherein the retaining portion is partially provided at equal intervals in the circumferential direction over the entire circumference of the through hole.

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