JP5706749B2 - Cleaning device for vehicle lamp - Google Patents

Description

  The present invention relates to a vehicular lamp cleaning apparatus. More specifically, the present invention relates to a technical field in which a valve for supplying or stopping a cleaning liquid is arranged at a branch portion of a flow path to ensure a smooth flow state of the cleaning liquid.

  There is a cleaning device that cleans the surface of the cover of a vehicular lamp 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 coupled, 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 apparatus described in Patent Document 1, a valve that is moved in the flow direction of the cleaning liquid and opened and closed is provided, and the cleaning liquid is supplied to the inside of the piston to increase the hydraulic pressure, so that the valve is opened and the cleaning liquid is supplied. It is supplied to the inside of the valve case and injected from the injection nozzle.

JP 2010-221782 A

  However, in the cleaning device described in Patent Document 1, when the valve is opened, the cleaning liquid is once branched and flows through the periphery of the valve, and then merges again and flows toward each injection nozzle. It is configured as follows.

  Accordingly, the liquid pressure of the cleaning liquid is likely to fluctuate, the valve open / close state may become unstable, and the valve may be operated to alternately repeat the open state and the closed state, and the cleaning liquid does not flow smoothly and is injected. There is a possibility that the cleaning liquid is not stably ejected from the nozzle.

  Therefore, an object of the cleaning apparatus of the present invention is to ensure a smooth flow state of the cleaning liquid and stabilize the spraying operation of the cleaning liquid from the spray nozzle.

In order to solve the above-described problem, a vehicular lamp cleaning apparatus includes a cylinder in which cleaning liquid is supplied from a supply tank and a first flow path in which cleaning liquid supplied to the cylinder flows. A piston that is supported by the cylinder so as to be movable in the axial direction with a part of the cylinder protruding, and a plurality of injection nozzles that respectively inject the cleaning liquid, and the shaft of the part of the piston protruding from the cylinder. A valve case coupled to one end portion in the direction, and communicated with each of the second flow path and the plurality of injection nozzles that are continuous with the first flow path inside the valve case. A plurality of third flow paths branched from the flow path are formed, a continuous portion of the second flow path and the plurality of third flow paths is formed as a branch portion, and the piston is The cleaning liquid is sprayed from each of the plurality of spray nozzles and is moved in a direction protruding with respect to the cylinder integrally with the case, and is opened and closed according to the liquid pressure of the cleaning liquid. A piston having a concavo-convex shape in which a valve for supplying or stopping the cleaning liquid from the two flow paths to the plurality of third flow paths is arranged and alternately arranged in the circumferential direction at one end portion in the axial direction of the piston A side fitting portion is provided, and the valve case is provided with a case side fitting portion having a concavo-convex shape that is fitted to the piston side fitting portion and alternately arranged in the circumferential direction. Each convex part and each concave part of the case side fitting part are fitted to the convex part so that the piston and the valve case are coupled to each other, and the piston has a cross section formed in a regular hexagonal shape. Has, tubular portion with its front end is provided as the piston side fitting portion, in which the convex portions of one to each side of the regular hexagon are provided so as to be located.

  Accordingly, in the vehicular lamp cleaning apparatus, when the cleaning liquid is supplied and the valve is opened, the cleaning liquid is branched from the second flow path into the plurality of third flow paths and sprayed from the respective spray nozzles. Is done.

The cleaning device for a vehicle lamp according to the present invention includes a cylinder in which a cleaning liquid is supplied from a supply tank, and a first flow path in which the cleaning liquid supplied to the cylinder flows. A piston which is supported in a projecting state so as to be movable in the axial direction, and has a plurality of spray nozzles for ejecting the cleaning liquid, respectively, and is coupled to one end portion in the axial direction of a portion of the piston projecting from the cylinder. A plurality of valve cases that are connected to the second flow path that is continuous with the first flow path and the plurality of injection nozzles and are branched from the second flow path. A third flow path is formed, a continuous portion of the second flow path and the plurality of third flow paths is formed as a branch portion, and the piston is integrated with the valve case. The cleaning liquid is sprayed from the plurality of spray nozzles by being moved in a direction projecting with respect to the cylinder, and is opened and closed in accordance with the liquid pressure of the cleaning liquid at the branch portion. A valve for supplying or stopping the cleaning liquid to the plurality of third flow paths is disposed , and a piston side fitting portion having an uneven shape alternately arranged in the circumferential direction is provided at one end portion in the axial direction of the piston. The valve case is provided with a case-side fitting portion that has a concavo-convex shape that is fitted to the piston-side fitting portion and is alternately arranged in the circumferential direction, and the case is provided in each concave portion and each convex portion of the piston-side fitting portion. Each convex part and each concave part of the side fitting part are fitted so that the piston and the valve case are coupled, and the piston has a cylindrical part whose cross section is formed in a regular hexagonal shape. Is its front end There together provided as said piston engaging portions, the convex portions of one to each side of the regular hexagon, characterized in that provided so as to be located.

Accordingly, since the cleaning liquid is branched into the third flow path simultaneously with the opening of the valve, the liquid pressure of the cleaning liquid is unlikely to fluctuate inside the valve case, the valve is stably opened and closed, and the cleaning liquid flows smoothly. The state can be ensured, and the cleaning liquid spraying operation from the spray nozzle can be stabilized. Further, the valve case can be coupled to the piston without setting the direction of the piston, and the workability in the coupling operation of the valve case to the piston can be improved.

  In the invention described in claim 2, there is provided a restricting portion for restricting the movement of the valve by pressing the valve inside the valve case, and the valve is provided in the restricting portion inside the valve case. An urging spring for urging in the pressing direction is disposed, and the valve is moved in the flow direction of the cleaning liquid in the second flow path to be opened and closed.

  Therefore, the valve opening / closing mechanism is simple, and the structure can be simplified and downsized.

  In the invention described in claim 3, the injection port of the injection nozzle functions as an opening hole to the atmosphere of the air existing in the third flow path.

  Therefore, it is not necessary to form a dedicated opening to the atmosphere in the valve case, and the structure can be simplified.

  According to a fourth aspect of the present invention, a tension coil spring that urges the piston in a direction to be housed in the cylinder is provided, and an annular engagement having a larger diameter than the other part is provided at one end of the tension coil spring. A support engagement portion is provided at one end of the piston in the axial direction, and a portion other than the annular engagement portion of the tension coil spring is inserted into the piston so that the annular engagement portion is supported by the annular engagement portion. The engagement portion is engaged and supported in an outer fitting manner, and the other end portion of the tension coil spring is supported by the cylinder.

  Therefore, it is possible to improve the workability in the assembling work for the piston of the tension coil spring.

  The best mode for carrying out the vehicular lamp cleaning apparatus 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.

The cylinder part 8 is formed in a regular hexagonal cross-sectional shape . The front end portion of the cylindrical portion 8 is provided as a piston-side fitting portion 11, and the piston-side fitting portion 11 has unevenness in which convex portions 11 a, 11 a,... And concave portions 11 b, 11 b,. It is formed into a shape. The piston side fitting part 11 is provided so that each one convex part 11a, 11a, ... may be located in each edge | side of a regular hexagon .

  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 coupling cylinder portion 12 has an outer diameter that is slightly larger than the outer diameter of the spring support portion 13, and an outer peripheral portion on the front surface is formed as a spring receiving surface 12a. At a position near the front end of the coupling cylinder portion 12, a flange-like fitting projection portion 12 b protruding outward is provided.

  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.

  In this way, in the cleaning device 1, since one end portion (annular engagement portion 17 b) of the tension coil spring 17 is supported by the piston 3 by inserting the tension coil spring 17 into the piston 3, The workability in the assembly work for the piston 3 can be improved.

  Further, since one end portion of the tension coil spring 17 is an annular engagement portion 17b wound in a coil shape, the length in the axial direction of the tension coil spring 17 and the piston 3 is shortened, and the total length of the piston 3 is shortened. Therefore, the size of the cleaning device 1 can be reduced.

  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 same-diameter portion 27 is formed in a substantially cylindrical shape, and has a fitting groove 27a extending in the circumferential direction on the inner surface (see FIG. 6).

  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 case-side fitting portion 28 has convex portions 28a, 28a,... And concave portions 28b, 28b,. It is formed in a concavo-convex shape lined up.

  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. In a state where the valve case 4 is coupled to the piston 3, the fitting projection 12 b provided on the coupling cylinder portion 12 is fitted into a fitting groove 21 a formed on the coupling projection 21.

  In the state where the valve case 4 is coupled to the piston 3, the convex portions 28a, 28a,... Of the case side fitting portion 28 and the concave portions 28b, 28b,. , 11b,... And convex portions 11a, 11a,.

  At this time, the valve case 4 is coupled to the piston 3 in such a direction that the injection nozzles 29 and 29 are located on the upper side, but the direction in the vertical direction is not set for the piston 3. Therefore, the valve case 4 can be coupled to the piston 3 without setting only the vertical direction of the valve case 4 and setting the vertical direction of the piston 3, and in the coupling work of the valve case 4 to the piston 3. Workability can be improved.

  Further, since it is not necessary to provide the piston 3 or the valve case 4 with a positioning structure such as a positioning projection or a positioning hole so that both are coupled in the correct direction in the vertical direction, The total length of the coupling cylinder portion 12 can be shortened, and the cleaning device 1 can be downsized.

  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 has a cover portion 32 formed in a shape according to the design of the vehicle, such as a horizontally long flat plate facing in the front-rear direction, and a coupling portion 33 protruding rearward from the cover portion 32 and formed in a cylindrical shape. (See FIG. 7).

  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.

  The cleaning device 1 is attached to the vehicle body 200, a bumper, or a vehicle headlamp by a bracket 50 (see FIGS. 1 and 8). 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. 8).

  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.

  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. 8).

  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. 9). 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. Flow into the flow paths 4b and 4b (see FIG. 10). 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 cleaned with the cleaning liquid 300 (see FIG. 9).

  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. 8).

  As described above, in the cleaning device 1, the branch portion 30 formed inside the valve case 4 is opened and closed in accordance with the hydraulic pressure of the cleaning liquid 300, and the third flow from the second flow path 4 a. A valve 24 for supplying or stopping the cleaning liquid 300 to the flow paths 4b and 4b is disposed.

  Accordingly, since the cleaning liquid 300 is branched into the third flow paths 4b and 4b simultaneously with the opening of the valve 24, the liquid pressure of the cleaning liquid 300 is not easily changed inside the valve case 4, and the open / closed state of the valve 24 is stabilized. As a result, a smooth flow state of the cleaning liquid 300 can be ensured, and the operation of spraying the cleaning liquid 300 from the spray nozzles 29 and 29 can be stabilized.

  Further, since the valve 24 is moved and opened in the flow direction of the cleaning liquid 300 in the second flow path 4a as the tension coil spring 17 expands and contracts, the opening / closing mechanism of the valve 24 is simple, the structure is simplified and the size is reduced. Can be achieved.

  Furthermore, since the injection ports 29a and 29a of the injection nozzles 29 and 29 function as open holes to the atmosphere of the air existing in the third flow paths 4b and 4b, respectively, a separate open hole to the atmosphere is provided for the valve case 4. Therefore, the structure can be simplified.

  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. 10 show the best mode of the vehicular lamp cleaning apparatus of the present invention, and this figure is a perspective view of the cleaning apparatus shown together with a 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 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, 3a ... 1st flow path, 4 ... Valve case, 4a ... 2nd flow path, 4b ... 3rd flow path, 8 ... Cylindrical part, 9 ... Support Engaging part, 11 ... piston side fitting part, 11a ... convex part, 11b ... recessed part, 17 ... tensile coil spring, 17b ... annular engaging part, 23 ... biasing spring, 24 ... valve, 25 ... regulating part, 28 ... Case side fitting part, 28a ... convex part, 28b ... concave part, 29 ... injection nozzle, 29a ... injection port, 30 ... branching part, 300 ... cleaning liquid

Claims (4)

A cylinder to which cleaning liquid is supplied from a supply tank, and
A first flow path through which the cleaning liquid supplied to the cylinder flows is formed and a piston partially supported by the cylinder so as to be movable in the axial direction;
A valve case having a plurality of injection nozzles for respectively injecting the cleaning liquid and coupled to one end portion in the axial direction of a portion of the piston protruding from the cylinder;
Inside the valve case, a second flow path that is continuous with the first flow path, and a plurality of third flow paths that are in communication with the plurality of injection nozzles and are branched from the second flow path, respectively. Formed,
A continuous portion of the second flow path and the plurality of third flow paths is formed as a branch portion,
The piston is moved in a direction in which the piston is integrated with the valve case and protruded from the cylinder, and the cleaning liquid is sprayed from the plurality of spray nozzles,
A valve that opens and closes according to the liquid pressure of the cleaning liquid and supplies or stops the cleaning liquid from the second flow path to the plurality of third flow paths is disposed in the branch portion,
A piston side fitting portion having an uneven shape alternately arranged in the circumferential direction is provided at one end portion in the axial direction of the piston,
The valve case is provided with a case-side fitting portion having a concavo-convex shape fitted to the piston-side fitting portion and alternately arranged in the circumferential direction,
Each convex part and each concave part of the case side fitting part are fitted to each concave part and each convex part of the piston side fitting part so that the piston and the valve case are coupled,
The piston has a cylindrical portion whose cross section is formed in a regular hexagonal shape, and the cylindrical portion has a front end portion provided as the piston side fitting portion, and one convex portion on each side of the regular hexagon. A vehicular lamp cleaning device, wherein the vehicular lamp is provided so as to be positioned . A restriction portion is provided that restricts movement of the valve by pressing the valve inside the valve case,
A biasing spring that biases the valve in the direction of pressing the valve against the restricting portion is disposed inside the valve case,
The apparatus for cleaning a vehicle lamp according to claim 1, wherein the valve is moved in the flow direction of the cleaning liquid in the second flow path to be opened and closed. The apparatus for cleaning a vehicular lamp according to claim 1 or 2, wherein an injection port of the injection nozzle functions as an opening hole for air existing in the third flow path to the atmosphere. . A tension coil spring is provided for biasing the piston in the direction of being accommodated in the cylinder,
An annular engagement part having a larger diameter than the other part is provided at one end of the tension coil spring,
A support engagement portion is provided at one end in the axial direction of the piston,
A portion other than the annular engagement portion of the tension coil spring is inserted into the piston so that the annular engagement portion is engaged and supported by the support engagement portion in an outer fitting manner, and the other portion of the tension coil spring. 4. The vehicle lamp cleaning device according to claim 1, wherein the end portion is supported by the cylinder.

Images