JP2002173006A - Head lamp cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head lamp cleaner having an easily machinable cylinder and reducing the cost. SOLUTION: This head lamp cleaner 10 is provided with a cylinder 12 formed by a solid drawn pipe and having opening parts 14, 46 at both ends. Machining for the inner surface of the cylindered is unnecessary or easy. The opening parts 14, 46 at both ends of the cylinder 12 are respectively covered with a cylinder bottom part 16 and a cylinder to P part 48 where claws 24 of the cylinder 12 are engaged with recessed parts 22 to be held on the cylinder 12. The cylinder bottom part 16 is provided with a hose joint part 26, and the cylinder stop part 48 functions as a guide, a stopper and a whirl-stop for an expansion nozzle, whereby the increase in number of parts due to both end cylindrical openings of the cylinder 12 can be prevented to reduce the cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlamp cleaner for injecting a cleaning liquid for cleaning a headlamp of a vehicle, and more particularly, to a headlamp cleaner having an injection port which is accommodated when inactive and is extended to a predetermined position during operation. Telescopic headlamp cleaner to be used.

[0002]

2. Description of the Related Art There is a headlamp cleaner as a device for arbitrarily cleaning a headlamp of an automobile by operating a switch at hand by a driver (driver) when the headlamp of an automobile becomes dirty. Some headlamp cleaners have a structure in which a telescoping nozzle having an injection port at an end portion is extended toward the vicinity of the headlamp only when the headlamp is cleaned.

[0003] Generally, a piston-cylinder structure utilizing the hydraulic pressure of a cleaning liquid is employed as the telescopic structure. That is, a piston provided at one end of the telescopic nozzle is disposed in a bottomed cylindrical cylinder, and a cleaning liquid is supplied from a cleaning liquid pump between the bottom of the cylinder and the piston. The telescopic nozzle is urged toward the bottom of the cylinder by a compression coil spring in a state where the nozzle is inserted into the opening of the cylinder and the injection port provided at the other end is located outside the cylinder. Further, the telescopic nozzle has a flow path of the cleaning liquid over substantially the entire length including the piston portion, and the injection port is connected to a portion of the cylinder to which the cleaning liquid is supplied. Further, a check valve is provided on the upstream side of the injection port, which communicates the flow path of the cleaning liquid with the injection port only when the liquid pressure of the cleaning liquid exceeds a predetermined value.

[0004] In the headlamp cleaner having such a structure, usually, the urging force of the compression coil spring is brought into a shortened state in which the piston portion of the telescopic nozzle is located at the bottom of the cylinder. On the other hand, when the cleaning liquid pump is actuated and the liquid pressure of the cleaning liquid between the cylinder bottom and the piston increases, the hydraulic pressure moves the piston toward the opening of the cylinder against the urging force of the compression coil spring. As a result, the headlamp cleaner is in the extended state (it reaches the position where the cleaning liquid is sprayed onto the headlamp). In this state, when the pressure of the cleaning liquid further exceeds the predetermined value, the check valve is opened and the cleaning liquid is jetted from the jet port toward the headlamp.

[0005]

By the way, in the headlamp cleaner having the above-mentioned expansion and contraction structure, airtightness is secured before and after the piston portion, or wear of the sealing material provided on the outer peripheral portion of the piston portion is prevented. Therefore, it is necessary to reduce the surface roughness of the inner peripheral surface of the cylinder to the same level as the mirror finish (to make the inner peripheral surface of the cylinder smooth).

However, in the conventional headlamp cleaner as described above, since the bottomed cylindrical cylinder is integrally formed, the inner peripheral surface of the cylinder is polished and mirror-finished. Is required and the number of processing steps is large, resulting in high cost.

An object of the present invention is to provide a headlamp cleaner capable of easily processing a cylinder at low cost in consideration of the above fact.

[0008]

In order to achieve the above object, a headlamp cleaner according to the first aspect of the present invention is provided.
Injection for injecting the cleaning liquid integrally with the piston part and outside the cylinder by sliding the piston part with respect to the cylinder by the liquid pressure of the cleaning liquid acting on the piston part disposed in the cylinder. A headlamp cleaner in which a telescopic nozzle having a mouth is moved to a predetermined injection position, wherein the cylinder is formed in a cylindrical shape having both ends opened, and one end side opening is covered with a second cover member. The opening at the other end is covered with a first cover member that slidably supports the telescopic nozzle.

In the headlamp cleaner according to the present invention, when the pressure of the cleaning liquid in the cylinder whose both ends are covered by the first cover member and the second cover member acts on the piston portion of the telescopic nozzle, the piston portion is moved. By sliding with respect to the cylinder, the telescopic nozzle is moved to a predetermined injection position while sliding with the first cover member. Thereby, the injection port of the telescopic nozzle reaches the injection position of the cleaning liquid, for example, near the headlamp provided in the vehicle.

[0010] Here, since the cylinder is formed in a cylindrical shape with both ends opened, machining of the inner peripheral surface thereof is easy and the cost is reduced. Further, by applying a drawn tube formed with high precision and low surface roughness to the cylinder, finishing of the inner peripheral surface of the cylinder becomes unnecessary, and the cost is further reduced.

Thus, in the headlamp cleaner according to the first aspect, the processing of the cylinder is easy and the cost is low.

A headlamp cleaner according to a second aspect of the present invention is the headlamp cleaner according to the first aspect, wherein at least one of the first cover member and the second cover member is engaged with an opening end surface of the cylinder. In this state, the locking piece provided at the opening end is swaged to be held by the cylinder.

In the headlamp cleaner according to the second aspect, a locking piece is formed at the open end of the cylinder, and at least one of the first cover member and the second cover member is engaged with at least one of the open end surfaces on both sides of the cylinder. By caulking the locking pieces in this state, at least one cover member is held by the cylinder. This eliminates the necessity of using another coupling member (for example, a screw or an adhesive) when assembling at least one of the first cover member and the second cover member to the cylinder.

Therefore, it is easy to cover at least one of the opening portions at both ends of the cylinder, and it is possible to suppress an increase in the number of parts.

A headlamp cleaner according to a third aspect of the present invention is the headlamp cleaner according to the first aspect, further comprising an engaging hole provided in the cylinder and an engaging claw engageable with the engaging hole. A hook member provided along at least one of the first cover member and the second cover member along a longitudinal direction of the cylinder and elastically deformable in a radial direction of the cylinder. The hook member and the engagement hole are held by the cylinder by engaging with the relative movement of the cylinder in the axial direction.

In the headlamp cleaner according to the third aspect, the engagement hole provided in the cylinder and the hook member provided in at least one of the first cover member and the second cover member are formed by the hook member, the engagement hole, Since at least one cover member is held by the cylinder by being engaged with the relative movement in the cylinder axial direction, in other words, these are connected and held by the relative movement of at least one cover member and the cylinder. Therefore, it is easy to cover at least one of the opening portions at both ends of the cylinder, and the increase in the number of parts is suppressed.

Further, since the cylinder is merely provided with the engagement hole, the working is easy and the influence on the accuracy (surface roughness and roundness) of the inner peripheral surface of the cylinder is small.

A headlamp cleaner according to a fourth aspect of the present invention is the headlamp cleaner according to any one of the first to third aspects, wherein the first cover member is
It is characterized by comprising a cylindrical portion extending into the cylinder along the inner peripheral surface of the cylinder, wherein the piston portion is restricted in a sliding range with respect to the cylinder by the cylindrical portion.

In the headlamp cleaner according to the fourth aspect, the first cover member has a cylindrical portion extending into the cylinder along the inner peripheral surface of the cylinder. When the first cover member is moved, the load in the cylinder radial direction acting on the first cover member is supported, and the first cover member does not shift or fall off.

Further, since this cylindrical portion functions as a stopper for restricting the sliding range of the piston portion (moving amount of the telescopic nozzle), the headlamp having a common cylinder and having various moving amounts (strokes) of the telescopic nozzle is used. You can get a cleaner.

Further, in the structure having the engaging means according to the third aspect, the cylindrical portion functions as a guide when the hook member and the engaging hole are relatively moved.

As described above, since the first cover member has various functions, an increase in the number of parts is further suppressed.

A headlamp cleaner according to a fifth aspect of the present invention is the headlamp cleaner according to any one of the first to fourth aspects, wherein the first cover member is
The telescopic nozzle is supported so as not to rotate around the axis of the cylinder.

In the headlamp cleaner according to the fifth aspect, the first cover member supports the telescopic nozzle so as to be slidable and non-rotatable around the axis of the cylinder, so that the telescopic nozzle can be moved to a predetermined injection position. Accordingly, rotation around the axis is prevented. For this reason, the number of parts increases (for example, the addition of a guide shaft arranged outside the cylinder).
Without this, the cleaning liquid jetting direction from the jet port provided in the telescopic nozzle is maintained in a constant direction.

A headlamp cleaner according to a sixth aspect of the present invention is the headlamp cleaner according to any one of the first to fifth aspects, wherein the second cover member is
A supply port for supplying the cleaning liquid into the cylinder is provided.

In the headlamp cleaner according to the present invention, the supply port for supplying the cleaning liquid into the cylinder is provided in the second position.
Since the cover member is provided, the number of processing steps of the cylinder is reduced, and the influence on the accuracy of the inner peripheral surface of the cylinder is reduced.

[0027]

FIG. 1 shows an embodiment of the present invention.
This will be described with reference to FIGS.

FIG. 1 is a sectional view showing the overall configuration of a headlamp cleaner 10 according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the configuration of the expansion and contraction mechanism of the headlamp cleaner 10.

As shown in FIGS. 1 and 2, the headlamp cleaner 10 has a cylinder 12. The cylinder 12 is formed of a cylindrical drawing tube having both ends opened,
The inner diameter (roundness) is highly accurate and the inner peripheral surface has low surface roughness. One end side opening 1 of this cylinder 12
4 is provided with a cylinder bottom portion 16 as a second cover member that covers the opening 14.

The cylinder bottom portion 16 has an engaging portion 18 having an outer diameter substantially equal to the outer diameter of the cylinder 12 and a fitting portion 20 having an outer diameter substantially equal to the inner diameter of the cylinder 12. Fitting part 2
0 is inserted (fitted) into the cylinder 12 and the engaging portion 18 is arranged in a state of being engaged with the end of the opening 14 of the cylinder 12. In this state, the cylinder bottom portion 16
As shown in (B), the locking piece 24 provided outside the opening 14 of the cylinder 12 is caulked into the concave portion 22 provided at the outer peripheral end of the engaging portion 18, so that the falling off from the cylinder 12 is prevented. Has been prevented.

The cylinder 1 of the cylinder bottom 16
A tube joint 26 as an integral supply port is provided upright from the outer end of the cylinder 2. A supply hole 28 communicating with the inside of the cylinder 12 is formed in the cylinder bottom 16 and the tube joint 26. Is provided.
A pressure-resistant tube (both not shown) connected to a cleaning liquid pump connected to the cleaning liquid tank is connected to the tube joint portion 26 so that the cleaning liquid is supplied into the cylinder 12 through a supply hole 28. further,
An O-ring groove 30 is provided on the outer peripheral portion of the cylinder bottom portion 16, and the O-ring 3
2, the outer periphery of the cylinder bottom 16 and the cylinder 12
The leakage of the cleaning liquid from between the inner peripheral portion and the inner peripheral portion is prevented.

On the other hand, a part of a telescopic nozzle 34 extending in the longitudinal direction along the longitudinal direction of the cylinder 12 is inserted into the cylinder 12. The expansion / contraction nozzle 34 has a substantially cylindrical shape in which a cleaning liquid flow path 36 is formed over the entire length. At one end of the telescopic nozzle 34 located inside the cylinder 12, there is provided a piston portion 38 whose outer diameter is increased to substantially the same diameter as the inner diameter of the cylinder 12. A seal groove 40 is provided on an outer peripheral portion of the piston portion 38, and a reciprocating seal 42 is arranged in the seal groove 40.
As a result, the inner peripheral surface of the cylinder 12, the outer peripheral surface of the piston portion 38, and the reciprocating seal 42 slide, whereby the telescopic nozzle 34 can reciprocate with respect to the cylinder 12, and the reciprocating seal 42 The leakage of the cleaning liquid from between the outer peripheral portion of the portion 38 and the inner peripheral portion of the cylinder 12 is prevented. Furthermore, a convex rail 44 is provided over the entire length of the outer peripheral surface of the telescopic nozzle 34 where the piston portion 38 is not provided.

The other end side opening 46 of the cylinder 12 is provided with a cylinder top 48 as a first cover member for covering the opening 46. The cylinder top portion 48 includes a cylinder top upper portion 48A and a cylinder top lower portion 48B divided into two along the axis of the cylinder 12.
It is composed of

The outer diameter of the cylinder top portion 48 (hereinafter simply referred to as the cylinder top portion 48 when the cylinder top upper portion 48A and the cylinder top lower portion 48B are assembled) is substantially the same as the outer diameter of the cylinder 12. Diameter engaging part 5
0, and a fitting portion 52 as a cylindrical portion having an outer diameter substantially the same as the inner diameter of the cylinder 12, and the fitting portion 52 is inserted into the cylinder 12 along the inner peripheral surface of the cylinder 12 (fitting). ) And the engagement portion 50 is disposed in a state of being engaged with the end of the opening 46 of the cylinder 12. In this state, as shown in FIG. 3 (A), the cylinder top portion 48 is provided with the opening portion 46 of the cylinder 12 in the concave portion 22 provided at the outer peripheral end of the engaging portion 50.
The engagement piece 24 provided on the outside is caulked to prevent the cylinder piece 12 from falling off. further,
A guide portion 54 having a smaller diameter than the engaging portion 50 extends from the outer end surface of the engaging portion 50 on the cylinder 12 side.

The fitting portion 50 of the cylinder top portion 48 has a spring hole 56 opened toward one end of the cylinder 12 and having an inner diameter sufficiently larger than a dimension obtained by adding the height of the rail 44 to the outer diameter of the telescopic nozzle 34. Is provided. Also,
The bottom of the spring hole 56 is a flat spring receiving surface 58.

Further, a guide hole 60 is provided from the spring receiving surface 58 to the end of the guide portion 54. The guide hole 60 is formed corresponding to the outer diameter of the telescopic nozzle 34, and has a rail guide portion 60A corresponding to the rail 44 of the telescopic nozzle 34 on the cylinder top upper part 48A side. As a result, the cylinder top portion 48 has a spring hole 56 and a guide hole 60
, The telescopic nozzle 34 whose other end is located outside the cylinder 12 is slidably (reciprocally moved) without rotating around the axis.

Further, a compression coil spring 62 is disposed between the telescopic nozzle 34 and the cylinder top 48. The compression coil spring 62 has an inner diameter that is larger than a dimension obtained by adding the height of the rail 44 to the outer diameter of the telescopic nozzle 34 when the outer shape is regarded as a cylindrical shape,
The outer diameter is smaller than the spring hole 56. One end of the compression coil spring 62 abuts the other end of the piston portion 38 of the telescopic nozzle 34 on the other end side of the cylinder 12 while the intermediate portion of the telescopic nozzle 34 is inserted therein, and the other end of the compression coil spring 62 has a cylinder top. It is in contact with the spring receiving surface 58 of the part 48.

Thus, the expansion / contraction nozzle 34 is normally urged toward one end of the cylinder 12 by the compression coil spring 62, and is in a shortened state in which most of the expansion nozzle 34 is located inside the cylinder 12. Further, in this state, a seal damper 64 is fitted to an end of the guide portion 54 of the cylinder top portion 48 with which an outer body 72 of the injection nozzle 70 described later abuts, to serve as a buffer when the telescopic nozzle 34 is shortened.

On the other hand, the expansion / contraction nozzle 34 is driven against the urging force of the compression coil spring 62 by the driving force acting on the piston 38 due to the hydraulic pressure of the cleaning liquid supplied into the cylinder 12 through the tube joint 26.
In the extended state, the piston portion 38 comes into contact with the end surface of the fitting portion 52 of the cylinder top portion 48 (the opening end surface of the spring hole 56). This fitting part 5
The length of 2 is determined such that an injection nozzle 70 described later reaches a predetermined injection position in a state where the piston portion 38 is in contact with the piston portion 38.

At the other end of the telescopic nozzle 34, an injection nozzle 70 is provided. The injection nozzle 70 has an outer body 72 which is formed in a cylindrical shape with a bottom and is coaxially integrated with the other end of the telescopic nozzle 34 with an opening 74 at the tip. It is provided in.
As shown in an enlarged view in FIG. 4, a flow path 78 communicating with the cleaning liquid flow path 36 of the telescopic nozzle 34 is provided at the bottom 76 of the outer body 72. Outside the flow path 78 on the inner surface of the outer body 72 of the bottom portion 76, there is provided a seal groove 80 formed coaxially and annularly with the flow path 78. The outer wall (center-facing side wall) of the seal groove 80 matches the inner peripheral surface of the cylindrical portion of the outer body 72. In addition, the outer body 7
In the cylindrical portion near the second opening 74, two engagement holes 82 engageable with an engagement claw 100 of a nozzle base 90 described later.
Is provided.

In the outer body 72, an elastically deformable valve seat seal 84 is arranged. As shown in FIGS. 5A and 5B, the valve seat seal 84 is formed in a ring shape having a through hole 86 corresponding to the flow path 78 at the center. An annular projection 88A is provided on the outer peripheral portion of the valve seat seal 84 in the axial direction toward the bottom portion 76 of the outer body 72, and is provided in the axial direction on the opening 74 side of the outer body 72. Annular projections 88B are provided. Of these, the annular projection 8
8A has a size and shape corresponding to the seal groove 80 provided in the bottom portion 76 of the outer body 72.

The injection nozzle 70 is connected to the nozzle base 9.
0 is provided. The nozzle base 90 has a cylindrical inner body portion 92 whose outer diameter is substantially the same as the inner diameter of the outer body 72 and is coaxial with the outer body 72, and a tip is bent substantially at right angles to the axis of the inner body portion 92. And a tip holding portion 94 having an enlarged inner diameter.
The nozzle tip 98 having the number 6 is fitted. The injection port 96 of the nozzle tip 98 is mounted on the vehicle, and when the telescopic nozzle 34 is extended with respect to the cylinder 12,
The cleaning liquid is arranged so as to be jettable toward a head lamp (not shown).

On the other hand, an engaging claw 100 which can be engaged with the engaging hole 82 of the outer body 72 is provided on the outer peripheral portion of the inner body 92, and the inner body 92 is fitted into the outer body 72. In this configuration, the engaging claw 100 is engaged with the engaging hole 82 to prevent the nozzle base 90 from dropping from the outer body 72. Further, the inner diameter of the inner body portion 92 opened toward the bottom portion 76 of the outer body 72 is substantially the same as the inner wall (radially outward side wall) of the seal groove 80 of the outer body 72. Accordingly, when the engagement claw 100 and the engagement hole 82 are engaged with each other, the axial end surface of the inner body portion 92 presses the annular protrusion 88B of the valve seat seal 84, and the inner body portion 92 is engaged with the seal groove 80 of the outer body 72. The valve seat seal 84 in which the annular projections 88A and 88B are elastically deformed is held in close contact with the axial end surface of the body portion 92.

Further, the inside of the inner body 92 is formed as a valve housing portion 102. As shown in FIG. 6, a plurality of (four in the present embodiment) convex portions 104 protrude from the inner peripheral surface of the valve housing portion 102 toward the axis of the valve housing portion 102. Each convex portion 104 has a rod-like or plate-like shape extending in the longitudinal direction along the axis of the inner body portion 92, and the diameter of an imaginary circle connecting radially inner ends of each convex portion 104 is equal to the diameter of the outer body 72. Flow passage 78 (through hole 8 of valve seat seal 84)
6) The diameter is sufficiently larger than the inner diameter.

This valve housing section 102 is provided with a chip holding section 94.
The communication part is formed in a conical shape with the cleaning liquid flow path 106 having substantially the same diameter as the flow path 78. The end of each convex portion 104 on the chip holding portion 94 side is also inclined corresponding to the conical communication portion, and this inclined portion is used as a spring receiving portion 108. The cleaning liquid flow path 106 is bent substantially at a right angle in accordance with the outer shape of the chip holding portion 94, and the inner diameter after bending is enlarged as described above. Are in communication.

A spherical valve 110 and a compression coil spring 112 that constitute a check valve are disposed inside the valve housing 102. The spherical valve 110 has a diameter sufficiently larger than the through hole 86 of the valve seat seal 84 and a diameter slightly smaller than an imaginary circle connecting radially inner ends of the respective convex portions 104 of the valve accommodating portion 102. While the movement of the valve housing portion 102 in the radial direction is restricted by 104, the valve housing portion 102 is arranged so as to be movable in the axial direction.
Thus, when the spherical valve 110 is in contact with the inner peripheral edge of the through hole 86 of the valve seat seal 84, the through hole 86
(Flow path 78) is closed to prevent the supply of the cleaning liquid into the nozzle base 90, and in a state where the spherical valve 110 is separated from the through hole 86, the cleaning liquid passes through the space between the convex portions 104 and passes through the nozzle base 90. 90.

Further, the compression coil spring 112
A predetermined amount is compressed and one end is
The other end is in contact with the spherical valve 110 in a state where the spherical valve 110 is engaged. Thereby, normally, in a state where the spherical valve 110 is urged toward the bottom portion 76 side of the outer body 72 along the axial direction of the inner body portion 92 by the compression coil spring 112,
The valve seat seal 84 is configured to be in contact with the inner peripheral edge of the through hole 86.

The headlamp cleaner 10 described above
Can be attached to an appropriate position of the vehicle (for example, in the front bumper) via a bracket (not shown) provided integrally with the cylinder 12 and the cylinder top portion 48, a frame member holding the cylinder 12, and the like. ing.

Next, the operation of the present embodiment will be described.

In the headlamp cleaner 10 having the above-described structure, normally (when the cleaning liquid pump is not operating), the expansion / contraction nozzle 3
4 is a shortened state with respect to the cylinder 12 (a state in which the bottom 76 of the outer body 72 is in contact with the seal damper 64),
For example, the telescopic nozzle 34 is housed in a front bumper of the vehicle.

In this state, the spherical valve 110 is brought into contact with the inner peripheral edge of the through hole 86 of the valve seat seal 84 by the urging force of the compression coil spring 112, and the supply of the cleaning liquid to the nozzle base 90 (injection port 96) is performed. Has been blocked. In this state, the cleaning liquid is filled in the pressure-resistant tube, between the piston part 38 of the cylinder 12 and the cylinder bottom part 16, in the cleaning liquid flow path 36 of the telescopic nozzle 34, and the like.

When the cleaning liquid pump is operated, the liquid pressure of the cleaning liquid rises, and the driving force acting on the piston part 38 by this liquid pressure causes the piston part 38 (the reciprocating seal 42) to act on the urging force of the compression coil spring 62. Cylinder 1 against
Slide with respect to 2. The sliding of the piston portion 38 causes the telescopic nozzle 34 to extend with respect to the cylinder 12.
This piston part 38 is fitted to the fitting part 5 of the cylinder top part 48.
When the two end surfaces are brought into contact with each other, further extension of the telescopic nozzle is restricted, and the jet nozzle 70 disposed at the tip of the telescopic nozzle 34 reaches a position where the cleaning liquid can be jetted to the headlamp.

In this state, when the liquid pressure of the cleaning liquid further rises, the driving force acting on the spherical valve 110 by this liquid pressure causes the spherical valve 110 to pass through the valve seat seal 84 against the urging force of the compression coil spring 112. The closed state of the through hole 86 is released by being separated from the hole 86. When the closed state of the through hole 86 is released, the cleaning liquid flows through the flow path 78 and the through hole 8.
6. The air is supplied to the ejection port 96 of the nozzle chip 98 through the space between the projections 104 of the valve accommodating section 102 and the cleaning liquid channel 106, and is ejected from the ejection port 96 toward the headlamp.

Here, the cylinder 12 has the opening 1 at both ends.
Since it is formed in a cylindrical shape having 4 and 46, its inner peripheral surface can be easily processed and the cost can be reduced. In particular, in the above configuration, since the cylinder 12 is formed of a drawn tube formed with high precision and low surface roughness, finishing of the inner peripheral surface of the cylinder 12 becomes unnecessary, and the cost is further reduced.

As described above, in the headlamp cleaner 10 according to the present embodiment, the processing of the cylinder is easy and the cost is low.

Here, since the cylinder bottom portion 16 and the cylinder top portion 48 are held by the cylinder 12 by the engagement of the concave portion 22 with the locking piece 24 of the cylinder 12, the cylinder bottom portion 16 and the cylinder top portion 48 are attached to the cylinder 12. When assembling the cylinder top portion 48, it is not necessary to use another coupling member (for example, a screw or an adhesive). For this reason, both ends of the cylinder 12 can be easily covered, and an increase in the number of parts can be suppressed.

Further, since the cylinder top portion 48 has the fitting portion 52 inserted into the cylinder 12 along the inner peripheral surface of the cylinder 12, the fitting portion 52 is provided with a predetermined jet of the telescopic nozzle 34. When moving to the position, the radial load of the cylinder 12 acting on the cylinder top portion 48 is supported, so that the cylinder top portion 48 does not shift with respect to the cylinder 12 or fall off. In addition, this fitting portion 52
Functions as a stopper that regulates the sliding range of the piston portion 38 (movement amount of the telescopic nozzle 34), so that the headlamp cleaner 10 having various moving amounts (strokes) of the telescopic nozzle 34 by using the same cylinder 12 is obtained. be able to. In other words, only by changing the shape of the cylinder top portion 48 (the length of the fitting portion 52), the headlamp cleaner 10 having a stroke corresponding to various vehicles can be obtained while sharing other components.

Further, since the telescopic nozzle 34 has the rail 44 and the cylinder top 48 has the rail guide portion 60A corresponding to the rail 44 in the guide hole 60 which slidably supports the telescopic nozzle 34,
Is prevented from rotating around the axis of the cylinder 12 with the movement to the predetermined injection position. Therefore, the cleaning liquid spray direction from the spray port 96 provided at the other end of the telescopic nozzle 34 does not increase without increasing the number of parts (for example, adding a guide shaft disposed outside the cylinder 12). Will be maintained.

Furthermore, since the hose joint 26 for supplying the cleaning liquid into the cylinder 12 is provided integrally with the cylinder bottom 16, the number of processing steps of the cylinder 12 is reduced, and the accuracy of the inner peripheral surface of the cylinder 12 is given. The effect is reduced. (Modification of Cylinder, Cylinder Bottom Portion, and Cylinder Top Portion) In the above embodiment, the cylinder bottom portion 16 and the cylinder top portion 48 are in a state where the engaging portions 18 and 50 are engaged with the end portions of the cylinder 12. The locking piece 24 of the cylinder 12 is engaged with the recess 22 so that the cylinder 12 is held undetachably. However, a configuration according to a modified example described below with reference to FIGS. It is good.

It is to be noted that basically the same parts and portions as those of the above-described embodiment are denoted by the same reference numerals as those of the above-described embodiment, and description thereof will be omitted.

In this modification, as shown in FIGS. 7 and 8, a cylinder 120 is provided in place of the cylinder 12. The cylinder 120 is formed of a drawn tube similarly to the cylinder 12, and the both ends opening portions 14, 46 are used instead of the locking pieces 24.
Are provided with engagement holes 122 at each of two locations.

A cylinder bottom 124 is provided in the opening 14 of the cylinder 120. The cylinder bottom portion 124 has the same engagement portion 1 as the cylinder bottom portion 16.
8, a fitting portion 20 provided with an O-ring groove 30, a tube joint portion 26, and a supply hole 28, and an O-ring 32 is arranged in the O-ring groove 30. In addition,
Unlike the cylinder bottom portion 16, the engaging portion 18 does not have the concave portion 22 formed therein.

Two hook members 126 corresponding to the engagement holes 122 of the cylinder 120 are provided upright along the outer peripheral surface of the fitting portion 20 at the end of the fitting portion 20 facing the piston portion 38. ing. The hook member 126 is provided with a hook-shaped engaging claw 128 at a tip end thereof, and
Are formed so as to be elastically deformable in the radial direction. The engaging claw 128 can be engaged with the engaging hole 122 of the cylinder 120. In this engaged state, the cylinder bottom portion 124 cannot be removed from the cylinder 120.

The cylinder bottom portion 124 is inserted into the cylinder 120 (relatively moved) while the hook member 126 is elastically deformed inward in the radial direction of the fitting portion 20, and the engaging claw 128 is engaged with the cylinder 120. When the position of the mating hole 122 is reached, the elastically deformed state of the hook member 126 is released, and the engaging claw 128 is engaged with the engaging hole 122 of the cylinder 120. In this state, the dimensions of each part are determined so that the engaging part 18 engages with the end of the opening 14 of the cylinder 120. Thereby, the cylinder bottom portion 1
The cylinder 120 is prevented from being inserted into the cylinder 120 or dropped from the cylinder 120.
(See FIG. 8).

On the other hand, the other end opening 46 of the cylinder 120
Is provided with a cylinder top portion 130. The cylinder top portion 130 is composed of a cylinder top upper portion 130A and a cylinder top lower portion 130B that are divided into two along the axis of the cylinder 120.

The cylinder top portion 130 (hereinafter, simply referred to as the cylinder top portion 130 means an assembled state of the cylinder top upper portion 130A and the cylinder top lower portion 130B), like the cylinder top portion 48.
2, a guide portion 54, a spring hole 56, a spring receiving surface 58, a guide hole 60, and a rail guide portion 60A. In addition, unlike the cylinder top portion 48,
The engagement portion 50 is not provided on the cylinder top portion 130.

Further, two hook members 132 corresponding to the engaging holes 122 of the cylinder 120 are provided upright along the outer peripheral surface of the fitting portion 52 at the end of the fitting portion 52 on the guide portion 54 side. . The hook member 132 is provided with a hook-shaped engaging claw 134 in the vicinity of the distal end, and is formed so as to be elastically deformable in the radial direction of the fitting portion 52 (cylinder 120). In addition, the engagement claw 1
34 is capable of engaging with the engaging hole 122 of the cylinder 120, and in this engaged state, the cylinder top portion 130 cannot be removed from the cylinder 120.

This hook member 132 (engaging claw 134)
Is located along the mating surface of the cylinder top upper part 130A and the cylinder top lower part 130B.
It is composed of a hook member upper piece 132A (engaging claw upper part 134A) and a hook member lower piece 132B (engaging claw lower part 134B) formed on both the 30A and the cylinder top lower part 130B. Engagement claw lower part 13
4B is adapted to be engaged with one engagement hole 122.

The cylinder top portion 130 is inserted into the cylinder 120 (relatively moved) with the hook member 132 elastically deformed radially inward of the fitting portion 52, and the engaging claw 134 engages the cylinder 120. When the hook member 132 reaches the position of the mating hole 122, the elastic deformation state of the hook member 132 is released, and the engaging claw 134 is engaged with the engaging hole 122 of the cylinder 120. As a result, the cylinder top 1
Reference numeral 30 denotes a configuration in which the cylinder 30 is held by the cylinder 120 in a state where the cylinder 30 is prevented from falling off (see FIG. 8). Note that the cylinder top portion 130 is
In the cylinder 1 by the compression coil spring 62
Since it is urged in the direction of withdrawal from 20, it is not inserted into cylinder 120 more than necessary.

With this configuration, the same operation and effect as those of the above embodiment can be obtained.

The hook members 126 and 13 provided on the cylinder bottom portion 124 and the cylinder top portion 130, respectively.
2 and the engagement hole 122 provided in the cylinder 120, and the cylinder 1 between the hook members 126 and 132 and the engagement hole 122.
In other words, the engagement of the cylinders 12 of the cylinder bottom portion 124 and the cylinder top portion 130 is performed without caulking the locking pieces 24 because the engagement is performed by the axial relative movement of
To be engaged by mere insertion (attachment) to
The covering of the openings 12 and 46 at both ends of the cylinder 120 is further facilitated.

Further, the cylinder top portion 13 divided into two parts
0, the engagement claw upper portion 134A and the engagement claw lower portion 134A
B is engaged with one engagement hole 122, so that the engagement hole 1
The number of 22 is reduced, the number of processing steps is reduced, and the accuracy of the cylinder 120 is less affected.

In the above-described embodiment and modified examples,
Although the cylinder 12 is engaged with the cylinder bottom portion 16 and the cylinder top portion 48, and the cylinder 120 is engaged with the cylinder bottom portion 124 and the cylinder top portion 130 by the same engagement means, the present invention is not limited to this. However, for example, the cylinder bottom 1
It goes without saying that the cylinder 6 and the cylinder top 48 may be engaged by separate engagement means. Therefore, for example, an engaging hole 122 may be provided on the opening 14 side of the cylinder 12 in which the opening 46 is covered with the cylinder top 48 to cover the opening 14 with the cylinder bottom 124.

Further, in the above-described embodiment and modified examples,
Since the telescopic nozzle 34 has the rail 44 and the cylinder tops 48 and 130 have the rail guides 60A, the telescopic nozzle 34
Although the present invention is configured to prevent the rotation, the present invention is not limited to this.
The cross-sectional shape of the expansion / contraction nozzle 34 is changed to an elliptical diameter or a polygonal shape.
The above-mentioned rotation may be prevented. Further, the telescopic nozzle 34 (excluding the piston portion 38) and the guide hole 60 may be configured to be eccentric with the axis of the cylinders 12, 120.

Further, in the above-described embodiment and modified examples, the cylinder tops 48 and 130 are configured to be divided into two parts. However, the present invention is not limited to this, and the cylinder tops 48 and 130 are formed integrally. May be. in this case,
It is desirable that the outer body 72 of the injection nozzle 70 be provided so as to pass through the guide hole 60 or be detachable from the telescopic nozzle 34.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an overall configuration of a headlamp cleaner according to an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a telescopic mechanism constituting the headlamp cleaner according to the embodiment of the present invention.

3A and 3B are diagrams showing a covering state of a cylinder opening constituting the headlamp cleaner according to the embodiment of the present invention, wherein FIG. 3A is a perspective view showing a cylinder top, and FIG. 3B is a cylinder bottom. FIG.

FIG. 4 is an enlarged sectional view showing a seal structure of an injection nozzle constituting a headlamp cleaner according to the embodiment of the present invention.

FIG. 5A is a front view showing a valve seat seal of an injection nozzle constituting a headlamp cleaner according to an embodiment of the present invention, and FIG. 5B is a sectional view of the valve seat seal.

FIG. 6 is a sectional view taken along the line 6-6 in FIG. 1;

FIG. 7 is an exploded perspective view showing a telescopic mechanism according to a modification of the embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a covering state of both ends of a cylinder according to a modification of the embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 10 headlamp cleaner 12 cylinder 16 cylinder bottom part (second cover member) 24 locking piece 26 hose joint part (supply port) 34 telescopic nozzle 38 piston part 48 cylinder top part (first cover member) 52 fitting part (cylindrical) Part) 96 injection port 120 cylinder 122 engaging hole 124 cylinder bottom part (second cover member) 126, 132 hook member 128, 134 engaging claw 130 cylinder top part (first cover member)

Claims (6)

[Claims] The piston slides with respect to the cylinder by the hydraulic pressure of the cleaning liquid acting on the piston disposed in the cylinder, so that the piston is integrated with the piston and axially outside the cylinder. On the other hand, a telescopic nozzle having an injection port for injecting the cleaning liquid is a headlamp cleaner moved to a predetermined injection position, wherein the cylinder is formed in a cylindrical shape with both ends opened,
A head, wherein the one side opening is covered with a first cover member slidably supporting the telescopic nozzle, and the other side opening is covered with a second cover member. Lamp cleaner. At least one of the first cover member and the second cover member is engaged with an opening end surface of the cylinder by caulking a locking piece provided at the opening end of the cylinder. The headlamp cleaner according to claim 1, wherein the headlamp cleaner is held by a cylinder. 3. An engagement hole provided in the cylinder, and an engagement claw engageable with the engagement hole, wherein at least one of the first cover member and the second cover member has the engagement hole of the cylinder. A hook member provided along the longitudinal direction and elastically deformable in the radial direction of the cylinder, wherein at least one of the hook member and the engagement hole is associated with relative movement of the cylinder in the axial direction. The headlamp cleaner according to claim 1, wherein the headlamp cleaner is held by the cylinder by being engaged. 4. The first cover member includes a cylindrical portion extending into the cylinder along an inner peripheral surface of the cylinder, and the piston portion defines a sliding range with respect to the cylinder by the cylindrical portion. The headlamp cleaner according to any one of claims 1 to 3, wherein the headlamp cleaner is regulated. 5. The headlamp cleaner according to claim 1, wherein the first cover member supports the telescopic nozzle so as not to rotate about an axis of the cylinder. . 6. The headlamp according to claim 1, wherein the second cover member has a supply port for supplying the cleaning liquid into the cylinder. Cleaner.