JP5758683B2 - Cleaning device for vehicle lamp and nozzle cover - Google Patents

Description

  The present invention relates to a vehicular lamp cleaning device and a nozzle cover. More specifically, the present invention relates to a technical field in which a nozzle cover that opens and closes an opening formed in a vehicle body or a bumper is coupled to a valve case having an injection nozzle to achieve downsizing and the like.

  There is a cleaning device that cleans the surface of the cover of a vehicle headlamp by ejecting a cleaning liquid from an injection nozzle partly protruding from an opening formed in a vehicle body or a bumper.

  The cleaning device includes a valve case having an injection nozzle that is provided on the front end side and injects cleaning liquid, a piston to which the valve case is connected, and a cylinder that movably supports the piston, and is attached to a vehicle body or a bumper by a bracket. Yes.

  In such a cleaning device, the valve case and a part of the piston protrude forward from the opening formed in the vehicle body or the bumper, and the cleaning liquid is injected from the injection nozzle to perform cleaning. The valve case and the piston are retracted and housed inside (see, for example, Patent Document 1).

  In the cleaning device described in Patent Document 1, a valve case having an injection nozzle is coupled to a front end portion of a piston, and a holder is attached to the front end portion of the valve case. A nozzle cover is coupled to the holder, and the valve case, the holder, and the nozzle cover are moved together as the piston moves. In the state where the piston is located at the rear, the opening formed in the vehicle body or the bumper is closed by the nozzle cover, and when the piston is moved forward, the opening is opened and the valve case is projected forward from the opening for injection. A cleaning liquid is sprayed from the nozzle to clean the surface of the cover.

JP 2006-151151 A

  However, in the cleaning apparatus described in Patent Document 1, since the holder is attached to the valve case and the nozzle cover is coupled to the holder, the entire length is long and the downsizing is hindered. There is a problem that the production cost is high due to a large number of points.

  Therefore, an object of the cleaning apparatus of the present invention is to reduce the manufacturing cost by reducing the total length and reducing the number of parts.

In order to solve the above-described problems, a vehicular lamp cleaning device is supported by a cylinder in which a cleaning liquid is supplied from a supply tank therein, and is movable in the axial direction with a part of the cylinder protruding. A piston case, and a valve case that has an injection nozzle that injects the cleaning liquid, is connected to one end portion in the axial direction of a portion of the piston protruding from the cylinder, and is moved integrally with the piston; A nozzle cover that opens and closes an opening formed in a vehicle body or a bumper according to the movement of the piston is coupled to the valve case with no inclusion between the valve case and the nozzle cover, and the valve case An elastically deformable engagement piece having an engagement protrusion or an engagement hole is provided on one of the coupling holding portion of the nozzle cover and the coupling portion of the nozzle cover, and the valve An engagement hole or an engagement protrusion that engages with the engagement protrusion or the engagement hole is formed on the other of the connection holding portion of the nozzle or the connection portion of the nozzle cover, and the connection holding portion of the valve case Nozzle holding portions are provided on both sides, the nozzle cover is moved in a direction relatively approaching the valve case, the engagement protrusion is slid on the engagement piece, and the engagement piece is elastically deformed. The nozzle cover is coupled to the valve case by engaging the engagement protrusion with the engagement hole and elastically returning the engagement piece .

  Therefore, in the vehicular lamp cleaning device, there is no inclusion between the bulb case and the nozzle cover.

In order to solve the above-described problem, the nozzle cover includes a cover portion that opens and closes an opening formed in a vehicle body or a bumper, and a coupling portion that is provided on the inner surface side of the cover portion, and has a jet case. The valve is moved in accordance with the movement of the piston moved relative to the cylinder in accordance with the supply amount of the cleaning liquid, and the coupling portion is in a state where no inclusion exists between the valve case and the nozzle cover. An elastically deformable engagement piece having an engagement protrusion or an engagement hole is provided on one of the coupling holding portion of the valve case or the coupling portion of the nozzle cover, and the coupling holding portion of the valve case or An engagement hole or an engagement protrusion that engages with the engagement protrusion or the engagement hole is formed on the other of the connection parts of the nozzle cover, respectively, on both sides of the connection holding part of the valve case. A slip holding portion is provided, moved in a direction relatively approaching the valve case, the engagement protrusion is slid on the engagement piece, the engagement piece is elastically deformed, and the engagement protrusion is engaged. The engagement piece is engaged with the joint hole, and the engagement piece is elastically returned to be coupled to the valve case .

  Therefore, the nozzle cover is coupled to the valve case with no inclusion between the nozzle cover and the nozzle case.

The cleaning device for a vehicle lamp according to the present invention includes a cylinder into which cleaning liquid is supplied from a supply tank, a piston that is supported by the cylinder so as to be movable in an axial direction, and a jet of the cleaning liquid. A valve case that is connected to one end portion in the axial direction of the portion of the piston that protrudes from the cylinder and moves integrally with the piston, and according to the movement of the piston A nozzle cover that opens and closes an opening formed in a vehicle body or a bumper is coupled to the valve case in a state in which no inclusion exists between the valve case and the nozzle cover, and a coupling holding portion of the valve case or the nozzle An elastically deformable engaging piece having an engaging protrusion or an engaging hole is provided on one of the connecting portions of the cover, and the connecting holding portion of the valve case or the front An engagement hole or an engagement protrusion that engages with the engagement protrusion or the engagement hole is formed on the other of the connection portions of the nozzle cover, and nozzle holding portions are respectively provided on both sides of the connection holding portion of the valve case. The nozzle cover is moved in a direction relatively approaching the valve case, the engagement protrusion is slid on the engagement piece, the engagement piece is elastically deformed, and the engagement protrusion is engaged. The nozzle cover is coupled to the valve case by being engaged with a joint hole and elastically returning the engagement piece .

Therefore, since there are no inclusions between the nozzle cover and the valve case, the overall length of the cleaning device can be shortened, and the size can be reduced, and the manufacturing cost can be reduced by reducing the number of parts. it can. Further, the engagement piece can be elastically deformed, so that the nozzle cover can be attached to and detached from the valve case, the attachment / detachment work of the nozzle cover to the valve case is easy, and the workability can be improved.

In the invention described in claim 2 , a guide portion is provided in the valve case, and the guide portion is guided to the nozzle cover when the nozzle cover is moved in a direction relatively approaching the valve case. A guided portion is provided.

  Therefore, the nozzle cover can be reliably coupled to a predetermined position with respect to the valve case.

In the invention described in claim 3 , the valve case is provided with a rotation restricting portion for restricting the rotation of the nozzle cover relative to the valve case.

  Accordingly, the rotation of the nozzle cover with respect to the valve case can be restricted and the nozzle cover can be held at a predetermined position with respect to the valve case.

The nozzle cover of the present invention comprises a cover part that opens and closes an opening formed in a vehicle body or a bumper, and a coupling part provided on the inner surface side of the cover part, and a supply amount of cleaning liquid is coupled with a valve case having an injection nozzle depending on the moved with the movement of the piston to be moved relative to the cylinder, the coupling portion is, in a state in which the inclusions is not present between the valve case and the nozzle cover, coupled to the valve case, the valve An elastically deformable engagement piece having an engagement protrusion or an engagement hole is provided on one of the coupling holding portion of the case or the coupling portion of the nozzle cover, and the coupling holding portion of the valve case or the coupling portion of the nozzle cover On the other side, an engagement hole or an engagement protrusion that engages with the engagement protrusion or the engagement hole is formed, and nozzle holding portions are provided on both sides of the coupling holding portion of the valve case, The engagement protrusion is slid on the engagement piece, the engagement piece is elastically deformed, and the engagement protrusion is engaged with the engagement hole. The engagement piece is coupled to the valve case by elastic return .

Accordingly, since there are no inclusions between the valve case and the entire length of the cleaning device, the size of the cleaning device can be reduced, and the manufacturing cost can be reduced by reducing the number of components. Further, the engagement piece can be elastically deformed, so that the nozzle cover can be attached to and detached from the valve case, the attachment / detachment work of the nozzle cover to the valve case is easy, and the workability can be improved.

  The best mode for carrying out the vehicle lamp cleaning device and nozzle cover of the present invention will be described below with reference to the accompanying drawings.

  The cleaning device 1 includes a cylinder 2, a piston 3 supported by the cylinder 2 so as to be movable in the axial direction (front-rear direction), and a valve case 4 connected to the front end of the piston 3 (FIGS. 1 to 3). reference).

  The cylinder 2 protrudes rearward from the cylindrical portion 5 formed in a cylindrical shape extending in the front-rear direction, the rear surface portion 6 projecting inward from the rear end portion of the cylindrical portion 5, and the inner peripheral portion of the rear surface portion 6. And a connecting portion 7.

  The front end of the cylindrical portion 5 is opened forward to form an opening 5a.

  The central hole of the rear surface portion 6 is formed as an inflow hole 6a, and the rear surface portion 6 is provided with a spring hooking protrusion 6b protruding from the inner peripheral surface.

  The connecting portion 7 is formed in a substantially cylindrical shape. Connected to the connecting portion 7 is a connecting tube (tube) 100 connected to a supply tank (not shown) in which a cleaning liquid described later is stored.

  The piston 3 includes a cylindrical portion 8 that extends in the front-rear direction, a support engagement portion 9 that protrudes forward from the front end portion of the cylindrical portion 8, and a flange portion 10 that protrudes outward from a position near the rear end of the cylindrical portion 8. Have.

  For example, the cylindrical portion 8 has a regular hexagonal cross-sectional shape. The front end portion of the cylindrical portion 8 is provided as a piston side fitting portion 11.

  The support engagement portion 9 has an outer shape smaller than the outer shape of the cylinder portion 8, and includes a cylindrical coupling cylinder portion 12 continuous to the cylinder portion 8 and a spring support portion 13 protruding forward from the coupling cylinder portion 12. .

  The spring support portion 13 is formed in a semicircular arc shape.

  A seal body 14 is attached to the rear side of the flange portion 10. The seal body 14 is made of an elastically deformable material such as a rubber material, and has an outer diameter slightly larger than the inner diameter of the cylindrical portion 5 of the cylinder 2.

  The internal space of the piston 3 is formed as a first flow path 3a through which the cleaning liquid flows.

  A portion of the piston 3 excluding the front end portion is inserted into the cylinder 2 from the front, and is supported by the cylinder 2 so as to be movable in the front-rear direction. In a state where the piston 3 is inserted and supported in the cylinder 2, the outer peripheral portion of the seal body 14 is in close contact with the inner peripheral surface of the cylinder 2, and the cleaning liquid is supplied to the inside of the cylinder 2 from the seal body 14. Inflow of the cleaning liquid to the front side is also prevented.

  In a state where the piston 3 is supported by the cylinder 2, a cap 15 is attached to the front end portion of the cylinder 2. The cap 15 is formed in a substantially annular shape, and is attached to the front end portion of the cylinder 2 in a state of being fitted on the cylinder portion 8 of the piston 3. The gap between the cylinder 2 and the piston 3 in the opening 5 a of the cylinder 2 is closed by the cap 15.

  A dust cover 16 is attached to the front side of the cap 15. The dust cover 16 is formed in a substantially annular shape by an elastically deformable material such as a rubber material, and its inner peripheral surface is in close contact with the outer peripheral surface of the cylindrical portion 8 of the piston 3. Therefore, the dust cover 16 prevents entry of dust, moisture, etc. into the cylinder 2.

  When the piston 3 is moved in the front-rear direction with respect to the cylinder 2, the seal body 14 is slid on the inner peripheral surface of the cylinder 2, and the outer peripheral surface of the cylindrical portion 8 of the piston 3 is brought into contact with the inner peripheral surface of the dust cover 16. To be slid.

  In a state where the piston 3 is supported by the cylinder 2, the tension coil spring 17 is supported between the cylinder 2 and the piston 3. The tension coil spring 17 is provided as an intermediate portion 17a wound at the same diameter except for the front and rear ends, and the front end portion is provided as an annular engagement portion 17b wound at a larger diameter than the intermediate portion 17a. The portion is provided as a hooking portion 17c formed in a hook shape.

  A portion of the tension coil spring 17 other than the annular engagement portion 17b is inserted into the piston 3 from the front (see FIG. 4). When the tension coil spring 17 is inserted into the piston 3 from the front, the annular engagement portion 17b is supported on the spring support portion 13 of the piston 3 in an outer fitting manner, and the rear surface of the annular engagement portion 17b is the coupling cylinder portion 12. Is pressed against the spring receiving surface 12a (see FIG. 5). The hooking portion 17c of the tension coil spring 17 protrudes rearward from the inside of the piston 3 and is engaged with and supported by the spring hooking projection 6b of the cylinder 2 (see FIGS. 2 and 3).

  Accordingly, the piston 3 is urged rearward with respect to the cylinder 2 by the tension coil spring 17, and the rear end surface is pressed against the front surface of the rear surface portion 6 of the cylinder 2. The position where the rear end surface of the piston 3 is pressed against the front surface of the rear surface portion 6 is the storage position of the piston 3.

  The valve case 4 has a base portion 18 and a pair of nozzle holding portions 19 and 19 (see FIGS. 5 and 6).

  The base portion 18 includes a substantially cylindrical coupling holding portion 20 that extends in the front-rear direction and a cylindrical coupling protrusion 21 that is continuous with the rear end of the coupling holding portion 20.

  The coupling holding part 20 is closed by a lid member 22 attached to the front end part. An urging spring 23 is disposed inside the coupling holding portion 20 (see FIG. 6). The biasing spring 23 is, for example, a compression coil spring, and the front end is attached to the lid member 22. A valve 24 is attached to the rear end portion of the urging spring 23. A substantially annular restricting portion 25 projecting inward is provided at the rear end portion of the coupling holding portion 20.

  In a state where no force in the compression direction (forward) is applied to the urging spring 23, the valve 24 is pressed against the restricting portion 25 from the front.

  The coupling protrusion 21 includes a throttle portion 26 that is continuous with the coupling holding portion 20 and a same-diameter portion 27 that is continuous with the rear end of the throttle portion 26. The narrowed portion 26 is formed in a shape that decreases in diameter as it goes forward.

  The internal space of the coupling protrusion 21 in the valve case 4 is formed as a second flow path 4a through which the cleaning liquid flows.

  The rear end portion of the coupling protrusion 21 is provided as a case side fitting portion 28.

  The nozzle holding portions 19, 19 protrude from the rear end portion of the coupling holding portion 20 to the side (outward), and the internal spaces communicate with the internal space of the coupling holding portion 20. Internal spaces from the rear end portion of the coupling holding portion 20 to the outer end portions of the nozzle holding portions 19 and 19 are formed as third flow paths 4b and 4b through which the cleaning liquid flows, respectively.

  The nozzle holding portions 19 and 19 hold injection nozzles 29 and 29 at outer ends, respectively. The injection ports 29a and 29a of the injection nozzles 29 and 29 are communicated with the third flow paths 4b and 4b, respectively, and the injection holes 29a and 29a are open holes to the atmosphere of the air existing in the third flow paths 4b and 4b, respectively. Function as.

  As described above, the second flow path 4a and the third flow path branched from the second flow path 4a to the left and right are communicated with the injection ports 29a and 29a of the injection nozzles 29 and 29, respectively, inside the valve case 4. Channels 4b and 4b are formed, and a continuous portion of the second flow path 4a and the third flow paths 4b and 4b is formed as a branch portion 30.

  A valve 24 attached to the rear end portion of the urging spring 23 is located at the branch portion 30. Therefore, when the valve 24 is moved and the tension coil spring 17 is expanded and contracted in the front-rear direction, the branch portion 30 is opened and closed by the valve 24.

  The valve case 4 is coupled to the piston 3 by press fitting into a coupling projection 21 fitted on the coupling cylinder 12.

  A nozzle cover 31 is coupled to the valve case 4 (see FIG. 7). The nozzle cover 31 functions as a cover that opens and closes an opening formed in a vehicle body or a bumper described later as the piston 3 moves. The nozzle cover 31 is formed by integrally forming a cover portion 32, a coupling portion 33, reinforcing portions 34, 34, and projecting piece portions 35, 35 (see FIGS. 7 and 8).

  The cover portion 32 is formed in a shape corresponding to the design of the vehicle, such as a horizontally long flat plate facing in the front-rear direction.

  The coupling portion 33 is located in the central portion in the left-right direction on the inner surface (rear surface) side of the cover portion 32. The coupling portion 33 includes an upper surface portion 36, a lower surface portion 37, and side surface portions 38 and 38.

  An engagement piece 39 protruding rearward is provided on the upper surface portion 36, and an engagement hole 39a penetrating vertically is formed at a position near the rear end of the engagement piece 39. Slits opened forward on the left and right sides of the engagement piece 39 are formed at a substantially central portion in the front-rear direction of the upper surface portion 36, and these slits are formed as guided portions 36a and 36a.

  The lower surface portion 37 is formed in a gentle arc shape convex downward.

  Slits opened forward are formed at the lower edges of the side portions 38 and 38, and these slits are formed as regulated portions 38a and 38a.

  The reinforcing portions 34 and 34 are spaced apart from each other with respect to the coupling portion 33 and protrude outward from the outer surfaces of the first piece portions 34a and 34a and the first piece portions 34a and 34a facing in the left-right direction, respectively. And second piece portions 34b and 34b.

  The projecting piece portions 35 and 35 are positioned between the coupling portion 33 and the reinforcing portions 34 and 34, respectively, and the left and right ends are continuous with the coupling portion 33 and the reinforcing portions 34 and 34, respectively. Each of the projecting piece portions 35 and 35 includes a base surface portion 40 and 40 facing in the vertical direction and a projecting portion 41 and 41 projecting downward from the base surface portion 40 and 40. The base surface portions 40, 40 are formed with cutout portions 40a, 40a opened forward.

  The nozzle cover 31 is moved rearward relative to the valve case 4 and is coupled to the valve case 4 by fitting the coupling portion 33 to the coupling holding portion 20.

  When the nozzle cover 31 is moved rearward, the nozzle cover 31 is elastically deformed so that the engagement piece 39 is slid by the engagement protrusion 20c and displaced upward. The protrusion 20c is engaged with the engagement hole 39a and the engagement piece 39 is elastically restored. At this time, the guide portions 20 b and 20 b of the valve case 4 are inserted into the guided portions 36 a and 36 a of the coupling portion 33, respectively, and the nozzle cover 31 is guided to the valve case 4.

  In a state where the nozzle cover 31 is coupled to the valve case 4, the coupling holding portion 20 of the valve case 4 is inserted into the coupling portion 33 of the nozzle cover 31, and the injection nozzles 29 and 29 are respectively connected to the protrusions 41 and 41 and the reinforcing portion. 34 is inserted between the 34 first piece portions 34a and 34a and is located on the rear side of the notches 40a and 40a.

  As described above, the guided portions 36 a and 36 a are formed on the nozzle cover 31, and the guide portions 20 b and 20 b are provided on the valve case 4, so that the nozzle cover 31 can be securely coupled to a predetermined position with respect to the valve case 4. it can.

  In the above, an example is shown in which slits are formed as the guided portions 36a and 36a, and protrusions inserted into the slits are provided as the guide portions 20b and 20b, but conversely, the guided portions 36a and 36a are provided. The guide portions 20b and 20b may be formed as slits as slits.

  In a state where the nozzle cover 31 is coupled to the valve case 4, the rotation restricting portions 20 a and 20 a of the valve case 4 are inserted into the restricted portions 38 a and 38 a of the nozzle cover 31, respectively, and the rotation of the nozzle cover 31 relative to the valve case 4 is performed. That is, the rotation of the piston 3 in the direction around the axis is restricted.

  In this way, the regulated portions 38a and 38a are formed in the nozzle cover 31, and the rotation restricting portions 20a and 20a are provided in the valve case 4, thereby restricting the rotation of the nozzle cover 31 relative to the valve case 4 to thereby prevent the nozzle cover 31 from being valved. The case 4 can be held at a predetermined position.

  In the above, an example is shown in which slits are formed as the restricted portions 38a, 38a and protrusions inserted into the slits are provided as the rotation restricting portions 20a, 20a. Conversely, the restricted portions 38a, 38a are provided. May be provided as protrusions and the rotation restricting portions 20a, 20a may be formed as slits.

  As described above, in the cleaning apparatus 1, the nozzle cover 31 is provided with the engagement piece 39 having the engagement hole 39a, the valve case 4 is provided with the engagement protrusion 20c, and the engagement piece 39 is elastically deformed. The nozzle cover 31 is coupled to the valve case 4. Therefore, in a state where the nozzle cover 31 is coupled to the valve case 4, the engagement piece 39 is elastically deformed to disengage the engagement protrusion 20 c from the engagement hole 39 a, and the nozzle cover 31 is attached to the valve case 4. On the other hand, the nozzle cover 31 can be removed from the valve case 4 by moving it relatively forward.

  As described above, in the cleaning device 1, the engagement piece 39 can be elastically deformed so that the nozzle cover 31 can be attached to and detached from the valve case 4, and the nozzle cover 31 can be easily attached to and detached from the valve case 4. Therefore, workability can be improved. In particular, since the nozzle cover 31 can be easily replaced, the maintainability can be improved.

  Further, in the cleaning device 1, since the nozzle cover 31 is coupled to the valve case 4 having the injection nozzles 29, 29, there are no inclusions between the nozzle cover 31 and the valve case 4.

  Accordingly, the entire length of the cleaning apparatus 1 can be shortened accordingly, and the size can be reduced, and the manufacturing cost can be reduced by reducing the number of parts.

  The cleaning device 1 is attached to a vehicle body 200, a bumper, or a vehicle headlamp by a bracket 50 (see FIGS. 1 and 9). The bracket 50 includes a cylindrical cylinder holding portion 51, a cylindrical closing portion 52 protruding forward from the cylinder holding portion 51, and attached portions 53, 53,... Protruding outward from the cylinder holding portion 51. Consists of.

  A pressing portion 51a projecting inward is provided at the front end of the cylinder holding portion 51 (see FIG. 9).

  The blocking part 52 is formed in a horizontally long substantially rectangular tube shape.

  In the bracket 50, the cylinder holding portion 51 is attached to the front end portion of the cylinder 2 with the closing portion 52 covering the valve case 4, and the attached portions 53, 53,. It is attached to the headlight by using screws. Accordingly, the cleaning device 1 is attached to the vehicle body 200, the bumper, or the vehicle headlamp by the bracket 50.

  In a state where the bracket 50 is attached to the vehicle body 200, the bumper or the vehicle headlamp, the front end surface of the closing portion 52 is on the rear opening edge of the opening 200a formed in the vehicle body 200, the bumper or the vehicle headlamp. It is abutted from behind. Therefore, entry of dust or the like into the inside of the valve case 4 or the like is prevented by the closing portion 52.

  In a state where the bracket 50 is attached to the vehicle body 200, a bumper, or a vehicle headlamp, the dust cover 16 is pressed from the outside by the pressing portion 51 a of the cylinder holding portion 51. Therefore, the dust cover 16 is prevented from falling off from the cap 15 and the cylinder 2, and a good function of the dust cover 16 is ensured.

  In the cleaning device 1 configured as described above, the piston 3 is urged rearward by the urging force of the tension coil spring 17 in the storage state stored inside the vehicle. The outer peripheral portion is in close contact with the front opening edge of the opening 200a formed in the vehicle body 200, the bumper or the vehicle headlamp, and the opening 200a is closed (see FIG. 9).

  At this time, the valve 24 is pressed against the restricting portion 25 by the biasing spring 23 disposed inside the valve case 4, and the second flow path 4 a and the third flow paths 4 b and 4 b are separated by the valve 24. (See FIG. 6).

  When the cleaning liquid is supplied from the supply tank to the inside of the piston 3 through the connecting pipe 100 in the above-described storage state, the cleaning liquid passes through the first flow path 3a of the piston 3 and the second flow path of the valve case 4. 4a. At this time, since the valve 24 is closed, the cleaning liquid does not flow into the third flow paths 4b and 4b.

  When the cleaning liquid flows into the second flow path 4a, the supplied cleaning liquid increases the internal pressure, the extension coil spring 17 is extended, the piston 3 protrudes forward from the cylinder 2, and the piston 3 moves forward. Accordingly, the valve case 4 and the nozzle cover 31 are integrally moved forward (see FIG. 10). When the valve case 4 is moved forward, the opening 200a of the vehicle body 200, the bumper or the vehicle headlamp is opened, and the valve case 4 protrudes forward from the opening 200a.

  When the flange portion 10 of the piston 3 contacts the cap 15 attached to the front end portion of the cylinder 2, the forward movement of the piston 3 and the like is stopped. When the forward movement of the piston 3 or the like is stopped, the internal pressure is further increased by the supplied cleaning liquid, the valve 24 is opened, the biasing spring 23 is compressed, and the cleaning liquid flows from the second flow path 4a to the third flow path. Are flowed into the flow paths 4b and 4b (see FIG. 11). The cleaning liquid 300 that has flowed into the third flow paths 4b and 4b from the second flow path 4a is sprayed from the spray ports 29a and 29a of the spray nozzles 29 and 29 toward the cover 400 of the vehicular headlamp. The cover 400 is washed with the washed liquid 300 (see FIG. 10).

  When the supply of the cleaning liquid from the supply tank is stopped, the internal pressure is reduced, the biasing spring 23 is extended, the valve 24 is closed, and the injection of the cleaning liquid 300 from the injection nozzles 29 and 29 is stopped.

  When the internal pressure further decreases, the urging force of the tension coil spring 17 moves the piston 3, the valve case 4, and the nozzle cover 31 rearward to return them to the retracted state (see FIG. 9).

  The shapes and structures of the respective parts shown in the best mode for carrying out the invention described above are merely examples of the embodiments performed in practicing the present invention. The range should not be interpreted in a limited way.

FIG. 2 to FIG. 11 show the best mode of the vehicle lamp cleaning device and the nozzle cover according to the present invention, and this figure is a perspective view of the cleaning device shown together with the bracket. It is sectional drawing of a washing | cleaning apparatus. It is a side view which shows a washing | cleaning apparatus partially in cross section. It is an expansion perspective view which shows the state by which a tension coil spring is inserted in a piston. It is a perspective view which shows the state from which the valve case was isolate | separated from the piston. It is an enlarged top view which shows the state by which the valve is obstruct | occluded by making a part into a cross section. It is a perspective view which shows the state from which the nozzle cover was isolate | separated from the valve case. It is an enlarged rear view of a nozzle cover. It is a side view which shows the state before a washing | cleaning liquid is injected in part in cross section. It is a side view which shows the state by which the washing | cleaning liquid is injected in part in cross section. It is an enlarged plan view which shows the state which supplied the washing | cleaning liquid and opened the valve partly in cross section.

DESCRIPTION OF SYMBOLS 1 ... Cleaning apparatus, 2 ... Cylinder, 3 ... Piston, 4 ... Valve case, 19 ... Nozzle holding part, 20 ... Coupling holding part, 20a ... Rotation restricting part, 20b ... Guide part, 20C ... Engagement protrusion, 29 ... Injecting nozzle, 31 ... nozzle cover, 32 ... cover portion, 33 ... coupling portion, 36a ... guided portion, 39 ... engaging piece, 39a ... engaging hole, 200 ... vehicle body, 200a ... opening, 300 ... cleaning liquid

Claims (4)

A cylinder to which cleaning liquid is supplied from a supply tank, and
A piston that is supported so as to be movable in the axial direction with a part of the cylinder protruding from the cylinder;
A valve case that has an injection nozzle for injecting the cleaning liquid, is connected to one end portion in the axial direction of a portion of the piston protruding from the cylinder, and is moved integrally with the piston;
A nozzle cover that opens and closes an opening formed in a vehicle body or a bumper according to the movement of the piston is coupled to the valve case in a state where no inclusion exists between the valve case and the nozzle cover,
An elastically deformable engagement piece having an engagement protrusion or an engagement hole is provided on one of the coupling holding portion of the valve case or the coupling portion of the nozzle cover,
An engagement hole or an engagement protrusion that engages with the engagement protrusion or the engagement hole is formed on the other of the connection holding part of the valve case or the connection part of the nozzle cover,
A nozzle holding part is provided on each side of the joint holding part of the valve case,
The nozzle cover is moved in a direction relatively approaching the valve case, the engagement protrusion is slid on the engagement piece, the engagement piece is elastically deformed, and the engagement protrusion is the engagement hole. The vehicle lamp cleaning device according to claim 1, wherein the nozzle cover is coupled to the valve case by elastically returning the engaging piece to the valve case . A guide portion is provided in the joint holding portion of the valve case,
Said nozzle cover, for vehicles according to claim 1, characterized in that a guided portion which the nozzle cover is guided by the guide portion when it is moved relatively closer direction to the valve casing Lamp cleaning equipment. Wherein the coupling holding portion of the valve casing, cleaning device of a vehicle lamp according to claim 1 or claim 2, characterized in that a rotation regulating portion for regulating the rotation of said nozzle cover relative to the valve case. A cover for opening and closing an opening formed in the vehicle body or bumper;
A coupling portion provided on the inner surface side of the cover portion,
A valve case having an injection nozzle is coupled and moved in accordance with the movement of the piston moved relative to the cylinder according to the supply amount of the cleaning liquid,
The coupling portion is coupled to the valve case with no inclusion between the valve case and the nozzle cover ,
An elastically deformable engagement piece having an engagement protrusion or an engagement hole is provided on one of the coupling holding portion of the valve case or the coupling portion of the nozzle cover,
An engagement hole or an engagement protrusion that engages with the engagement protrusion or the engagement hole is formed on the other of the connection holding part of the valve case or the connection part of the nozzle cover,
A nozzle holding part is provided on each side of the joint holding part of the valve case,
The engagement projection is moved in a direction relatively approaching the valve case, the engagement projection is slid on the engagement piece, the engagement piece is elastically deformed, and the engagement projection is engaged with the engagement hole. The nozzle cover is coupled to the valve case by elastically returning the engagement piece .

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