JP2020024795A - Valve attachment structure and vehicle lamp fitting - Google Patents

Abstract

To provide a valve attachment structure having good insertability/detachability of a valve.SOLUTION: In a valve attachment structure 10, a valve 30 includes: a light emitting part 31; a support part 33 which supports the light emitting part 31; a flange part 34 extending outward from the support part 33; and blade parts 35 protruding from the flange part 34. A reflector 122 includes: a cylindrical valve attachment body part 12; a socket fixture 13 provided at an opening end part 12a of the valve attachment body part 12; a cylindrical inner periphery rib wall 15 which is provided within the valve attachment body part 12 and defines an insertion hole 14 into which the light emitting part 31 of the valve 30 is inserted; and a cylindrical outer peripheral rib wall 16 which is provided at the outer side of the inner periphery rib wall 15 and in which groove parts 19 are formed at parts as seen in a circumferential direction. The blade parts 35 are dropped into the groove parts 19 of the outer periphery rib wall 15 to cause the flange part 34 to contact with the inner periphery rib wall 15 and the blade parts 35 to contact with the socket fixture 13, and then the valve 30 is fixed to the reflector 122.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a bulb mounting structure for mounting a bulb on a reflector of a vehicular lamp.

  Conventionally, a valve mounting structure for mounting a valve to a reflector in a bayonet manner by holding a blade protruding from a flange portion of the valve between an opening end of a valve mounting portion on a reflector side and a socket fixture has been known. Have been. In such a valve mounting structure, usually, a projection for regulating the movement of the blade is provided in a passage formed between the opening end of the valve mounting portion and the socket fixture, in which the blade slides. . When the valve is mounted on the reflector, a torque is applied to the valve in the forward rotation direction to cause the blade to climb over the projection against the elastic force of the socket fixture. Thus, the blade is restrained, and the valve is fixed in the circumferential direction. Conversely, when the valve is removed from the reflector, a torque is applied to the valve in the reverse rotation circumferential direction, so that the protrusion is mounted on the blade in a direction opposite to the direction in which the protrusion is attached, against the elastic force of the socket fixture. As a result, the blade is not restrained, and the valve is released from being fixed.

JP-A-5-135603

  In the conventional valve mounting structure as described above, for example, by increasing the projection, the torque in the reverse rotation direction required to remove the valve can be increased, and the valve can be hardly detached from the reflector. . However, in this case, the torque in the forward rotation direction required for mounting the valve also increases, which may hinder the valve mounting operation.

  The present invention has been made in view of such a situation, and an object of the present invention is to provide a bulb mounting structure and a vehicular lamp having good bulb insertion / removal properties.

  In order to solve the above-described problems, a valve mounting structure according to an embodiment of the present invention is a valve mounting structure for mounting a valve on a reflector, wherein the bulb includes a light emitting unit and a support unit that supports the light emitting unit. A flange protruding outward from the support, and a blade protruding from the flange. The reflector defines a tubular valve mounting body, a socket fixture provided at an open end of the valve mounting body, and an insertion hole provided in the valve mounting body for receiving a light emitting portion of the bulb. And a cylindrical outer peripheral rib wall provided outside the inner peripheral rib wall and having a groove in a part of the circumferential direction. When the blade portion is dropped into the groove of the outer peripheral rib wall, the flange portion comes into contact with the inner peripheral rib wall and the blade portion comes into contact with the socket fixture, and the valve is fixed to the reflector.

  The rotation of the valve in the other circumferential direction may be restricted by engaging the blade with the edge of the outer peripheral rib wall.

  The edge has a vertical surface extending from the end surface of the outer peripheral rib wall in a direction parallel to the axial direction of the insertion hole, and a slope extending from the end of the vertical surface in a direction inclined with respect to the axial direction. Is also good.

  When the blade is dropped into the groove, the surface of the blade that faces the surface that comes into contact with the socket fixture does not have to come into contact with the bottom surface of the groove.

  The socket fixture may be formed of a metal having a low spring property.

  Another aspect of the present invention is a vehicular lamp including the above-described bulb mounting structure.

  Advantageous Effects of Invention According to the present invention, it is possible to provide a bulb mounting structure and a vehicular lamp having good bulb insertion / removal properties.

BRIEF DESCRIPTION OF THE DRAWINGS It is sectional drawing of the vehicle lamp which applied the valve mounting structure which concerns on embodiment of this invention. 1 is a schematic perspective view for explaining a valve mounting structure according to an embodiment of the present invention. It is a front view of a valve attachment main-body part. It is a figure showing the state where the light emitting part of the bulb was inserted in the insertion hole of the bulb mounting main part. It is AA schematic sectional drawing of the valve attachment main-body part and valve shown in FIG. FIG. 7 is a diagram illustrating a state in which the bulb is rotated clockwise with respect to the valve mounting main body in a state where the light emitting portion of the bulb is inserted into the insertion hole of the valve mounting main body. FIG. 7 is a schematic cross-sectional view of the valve mounting main body and the valve shown in FIG. 6 taken along line BB. FIGS. 8A and 8B are schematic views for explaining the structure of the edge of the outer peripheral rib wall. FIGS. 9A and 9B are schematic diagrams for explaining the structure of the edge of the outer peripheral rib wall.

  Hereinafter, a valve mounting structure according to an embodiment of the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a sectional view of a vehicular lamp 100 to which a bulb mounting structure 10 according to an embodiment of the present invention is applied. The vehicle lamp 100 shown in FIG. 1 is a vehicle headlamp.

  As shown in FIG. 1, the vehicle lamp 100 includes a lamp body 102 having a concave portion opened in front of the lamp, and a cover 104 for closing an opening surface of the lamp body 102. The formed internal space is formed as a lamp room 106.

  A lamp unit 110 is tiltably supported in the lamp chamber 106 by an aiming mechanism including an aiming screw 111 and a ball joint 113.

  The lamp unit 110 is inserted into a substantially elliptical reflector 122, a cylindrical bulb mounting body 12 formed at the rear top of the reflector 122, and an insertion hole 14 formed in the bulb mounting body 12. The bulb 30 and the projection lens 126 are fixed to the front surface, and the lens holder 124 attached to the front opening of the reflector 122 is integrated.

The first focus _{f 1} of the reflector 122 positioned filament 32 of the bulb 30 is, in the second focus _{f 2} near the reflectors 122, clear shade 125 for cutting formation formed integrally with the lens holder 124 is erected ing. The light emission of the bulb 30 is reflected by the reflector 122 as shown in ray L of FIG. 1, after the convergence to a second focus f ₂ of the reflector 122 is projected is a substantially parallel light in front of the lamp by the projection lens 126 .

  In FIG. 1, reference numeral 116 denotes a decorative board made of a synthetic resin disposed around the projection lens 126 of the lamp unit 110, the surface of which is coated with silver to improve the appearance when the headlight is not lit. . In FIG. 1, reference numeral 119 denotes a rubber cover attached to an opening formed on the back surface of the lamp body 102.

  FIG. 2 is a schematic perspective view for explaining the valve mounting structure 10 according to the embodiment of the present invention. The bulb mounting structure 10 is a structure for mounting the bulb 30 to the reflector 122 of the vehicular lamp 100.

  The bulb 30 includes a light emitting portion 31 having a filament 32 therein, a support portion 33 for supporting the light emitting portion 31, a flange portion 34 projecting outward from the support portion 33, and three blade portions 35 protruding from the flange portion 34. (35a, 35b, 35c), and a socket 36 for connecting a power supply cable. The three blade portions 35 are arranged at intervals of 120 degrees around the axis of the valve 30.

  The reflector 122 includes a cylindrical valve mounting body 12, a socket fixture 13 provided at an open end 12 a of the valve mounting body 12, and a light emitting unit of the bulb 30 provided in the valve mounting body 12. It has a cylindrical inner peripheral rib wall 15 that defines an insertion hole 14 into which 31 is inserted, and a cylindrical outer peripheral rib wall 16 provided outside the inner peripheral rib wall 15.

  The socket fixture 13 is a member for fixing and holding the valve 30 to the valve mounting main body 12. The socket fixture 13 has a ring shape following the shape of the distal end surface of the opening end 12a of the valve mounting body 12. Three notches 17 (17a, 17b, 17c) are formed in the inner peripheral edge of the socket fixture 13. These three notches 17 correspond to the three blades 35 (35 a, 35 b, 35 c) of the bulb 30, and are arranged at intervals of 120 degrees about the axis of the socket fixture 13. The socket fixture 13 is fixed to the opening end 12 a of the valve mounting main body 12 by screws 18. The socket fixture 13 is preferably formed of a metal material having a spring property, but may be formed of a metal material having a small spring property. Although the details will be described later, in the valve mounting structure 10 according to the present embodiment, the amount of deformation of the socket fixture 13 at the time of fixing the valve is smaller than that in the related art. Therefore, a steel plate having low spring property can be applied, and the socket fixture 13 can be formed at lower cost. Here, the steel plate having a low spring property is a steel plate having a characteristic of a true stress of 250 MPa or less. Specifically, it is a general cold-rolled steel other than the cold-rolled steel for springs, and examples thereof include SPCC, SECC, and SPGE.

  FIG. 3 is a front view of the valve mounting body 12. FIG. 3 shows a state in which the socket fixture 13 has been removed in order to explain the internal structure of the valve mounting body 12.

  The valve mounting body 12 is a resin molded body having a cylindrical outer shape, and is formed integrally with the reflector 122 (see FIG. 1). An inner peripheral rib wall 15 and an outer peripheral rib wall 16 are formed inside the valve mounting main body 12 concentrically with the central axis of the valve mounting main body 12. The inner circumferential rib wall 15 has a cylindrical shape and defines an insertion hole 14 into which the light emitting portion 31 of the bulb 30 is inserted.

  The outer peripheral rib wall 16 is formed between the inner peripheral rib wall 15 and the side wall of the valve mounting main body 12. The outer peripheral rib wall 16 is also a cylindrical rib wall, but the outer peripheral rib wall 16 is formed with a groove 19 in a part in the circumferential direction. Specifically, three grooves 19 (19a, 19b, 19c) are formed in the outer circumferential rib wall 16 along the circumferential direction. The three grooves 19 are arranged at intervals of 120 degrees about the axis of the valve mounting body 12. In other words, the groove portion 19 includes three arc-shaped outer peripheral rib walls 16 (16a, 16b, 16c) arranged at intervals of 120 degrees about the axis of the valve mounting main body 12 in a front view, It can be said that the groove portion 19 (19a, 19b, 19c) having no rib wall is formed between the adjacent outer peripheral rib walls 16. In addition, the side wall of the valve mounting body 12 protrudes inward between the groove 19a and the outer peripheral rib wall 16b, between the groove 19b and the outer peripheral rib wall 16c, and between the groove 19c and the outer peripheral rib wall 16ab. Boss portions 20 (20a, 20b, 20c) are formed. The boss 20 (20a, 20b, 20c) has a screw hole 21 through which a screw 18 for fixing the socket fixture 13 is inserted.

  FIG. 4 shows a state in which the light emitting unit 31 of the bulb 30 is inserted into the insertion hole 14 of the bulb mounting main body 12. FIG. 5 is a schematic cross-sectional view of the valve mounting body 12 and the valve 30 shown in FIG. FIGS. 4 and 5 show a state in which the socket fixture 13 is removed for the sake of explanation. However, actually, the socket fixture 13 is provided on the open end 12 a of the valve mounting body 12. In a state where the socket fixture 13 is provided on the open end 12a of the valve mounting body 12, three grooves 19 (19a, 19b, 19c) are covered by the socket fixture 13 in a front view, The three outer peripheral rib walls 16 (16a, 16b, 16c) are exposed through the corresponding cutouts 17 (17a, 17b, 17c) formed in the socket fixture 13.

  When the bulb 30 is mounted on the reflector 122, the wings 35 of the bulb 30 are aligned with the corresponding cutouts 17 of the socket fixture 13 and fitted, and the light emitting section 31 of the bulb 30 is attached to the bulb mounting body 12. It is inserted into the insertion hole 14. Thereby, as shown in FIGS. 4 and 5, the corresponding blade portion 35 and the end face of the outer peripheral rib wall 16 come into contact with each other. That is, the blade portion 35a abuts on the end surface of the outer peripheral rib wall 16a, the blade portion 35b abuts on the end surface of the outer peripheral rib wall 16b, and the blade portion 35c abuts on the end surface of the outer peripheral rib wall 16c. . At this time, the end surfaces of the flange portion 34 and the inner peripheral rib wall 15 are not in contact with each other, and a gap G exists between the two.

  FIG. 6 shows a state where the light emitting part 31 of the bulb 30 is inserted into the insertion hole 14 of the bulb mounting main body 12 and the bulb 30 is rotated clockwise with respect to the valve mounting main body 12. FIG. 6 shows a state in which the socket fixture 13 has been removed for explanation.

  As shown in FIG. 4, when the valve 30 is rotated clockwise with respect to the valve mounting body 12 from a state where the corresponding blade 35 and the end face of the outer peripheral rib wall 16 are in contact with each other, the blade 35 responds. The outer peripheral rib wall 16 is slid on the end face. As shown in FIG. 6, when the valve 30 is rotated by a predetermined angle (approximately 45 degrees), the blade 35 is dropped into the corresponding groove 19 from the end face of the outer peripheral rib wall 16. That is, the blade portion 35a is dropped into the groove portion 19a, the blade portion 35b is dropped into the groove portion 19b, and the blade portion 35c is dropped into the groove portion 19c. When the blade portion 35 is dropped into the groove portion 19, the flange portion 34 and the end surface of the inner peripheral rib wall 15 are in contact with each other. That is, the gap G (see FIG. 5) between the flange portion 34 and the end surface of the inner peripheral rib wall 15 is eliminated.

  FIG. 7 is a schematic cross-sectional view of the valve mounting body 12 and the valve 30 shown in FIG. FIG. 7 shows a state where the blade portion 35 (35b) is dropped into the groove portion 19 (19b) formed between the outer peripheral rib wall 16 (16b) and the boss portion 20 (20b).

  FIG. 7 illustrates a part of the socket fixture 13 that is omitted in FIG. As described above, the socket fixture 13 is provided on the open end 12 a of the valve mounting body 12.

  As shown in FIG. 7, when the blade 35 is dropped into the groove 19, one end of the blade 35 is engaged with the edge 23 of the outer peripheral rib wall 16. Is regulated in the counterclockwise direction (left direction in FIG. 7). Further, the other end of the blade portion 35 is engaged with the boss portion 20, whereby the clockwise (rightward in FIG. 7) rotation of the blade portion 35 is restricted. As shown in FIG. 7, a projection 22 is provided on the lower surface of the socket fixture 13. The protrusion 22 is provided at a position corresponding to the grooves 19a, 19b, 19c. The socket fixture 13 presses the blade portion 35 downward (in the depth direction of the groove portion 19) by the action of a leaf spring via the projection portion 22. At this time, there is no member that supports the blade portion 35 from the valve mounting body 12 side. That is, when the blade 35 is dropped into the groove 19, the surface 37 of the blade 35 that faces the surface that comes into contact with the socket fixture does not contact the bottom surface 38 of the groove 19. Therefore, the force by which the socket fixture 13 presses the blade portion 35 is extremely small, and the amount of deformation of the socket fixture 13 is smaller than that in the related art. As a result, the blade portion 35 and the flange portion 34 of the valve 30 are sandwiched by the projection 22 and the inner peripheral rib wall 15 of the socket fixture 13, and the blade portion 35 is held in the groove portion 19, 30 is positioned and fixed to the reflector 122. In order to release this fixed state, a counterclockwise torque is applied to the valve 30 so that the blade 35 rides on the end of the outer peripheral rib wall 16 against the elastic force of the socket fixture 13 acting as a leaf spring. Need to be done. In other words, the fixed state of the valve 30 with respect to the reflector 122 is maintained unless the minimum torque required for the blade part 35 to ride on the end of the outer peripheral rib wall 16 is applied to the valve 30.

  As described above, in the valve mounting structure 10 according to the present embodiment, when the valve 30 is mounted on the reflector 122, a clockwise torque is applied to the valve 30, and the blade 35 of the valve 30 is mounted on the valve mounting main body 12. By dropping into the groove 19, the valve 30 is fixed. There is no need for torque for moving the blade over the protrusion as in the prior art described above. On the other hand, when removing the bulb 30 from the reflector 122, a counterclockwise torque is applied to the bulb 30 so that the blade 35 rides on the end of the outer peripheral rib wall 16 against the elastic force of the socket fixture 13. Then, the fixing of the valve is released. Therefore, in the valve mounting structure 10 according to the present embodiment, the torque required for mounting the valve 30 can be smaller than the torque required for removing the valve 30. As a result, it is possible to realize a valve mounting structure in which the valve 30 is easily mounted on the reflector 122 and the valve 30 is not easily detached from the reflector 122, that is, the valve can be easily inserted and removed.

  FIGS. 8A and 8B are schematic diagrams for explaining the structure of the edge 23 of the outer peripheral rib wall 16. In the valve mounting structure 10 according to the present embodiment, the edge 23 of the outer peripheral rib wall 16 has a vertical surface portion 23a extending from an end surface of the outer peripheral rib wall 16 in a direction parallel to the axial direction of the insertion hole 14, and a vertical surface portion 23a. A slope 23b extending from the end in a direction inclined with respect to the axial direction of the insertion hole 14. FIG. 8A shows a state in which the blade 35 is held in the groove 19 and the valve 30 is fixed. FIG. 8B shows a state immediately before the counterclockwise torque is applied to the valve 30 and the blade portion 35 rides on the end surface of the outer peripheral rib wall 16. In the present embodiment, since the slope 23b is formed on the edge 23, when a counterclockwise torque is applied to the valve 30, the blade 35 rises along the slope 23b and engages with the vertical surface 23a. It will be in the state of having done. When a counterclockwise torque is further applied to the valve 30 from here, the blade portion 35 rides on the end surface of the outer peripheral rib wall 16 and the fixing of the valve 30 is released.

  FIGS. 9A and 9B are schematic diagrams for explaining the structure of the edge 23 of the outer peripheral rib wall 16. 9 (a) and 9 (b), the thickness of the blade portion 35 is thicker than FIGS. 8 (a) and 8 (b). Although there is a standard for the size of the bulb of the vehicular lamp, a tolerance is allowed for the standard dimension. Since the thickness of the blade portion 35 has a tolerance of ± 15%, the valve mounting structure needs to allow this tolerance.

  FIG. 9A shows a state in which the blade 35 is held in the groove 19 and the valve 30 is fixed. FIG. 9B shows a state immediately before the counterclockwise torque is applied to the valve 30 and the blade portion 35 rides on the end surface of the outer peripheral rib wall 16.

  As described with reference to FIG. 8B, when a counterclockwise torque is applied to the valve 30, the blade portion 35 rises along the slope portion 23b and is brought into a state of being engaged with the vertical surface portion 23a. Here, the length of engagement between the edge 23 of the outer peripheral rib wall 16 and the blade portion 35 is α, and this is referred to as “engagement amount”. In the present embodiment, when a counterclockwise torque is applied to the valve 30, the blade portion 35 rises along the slope portion 23b. Therefore, as shown in FIG. 8B and FIG. The amount of engagement α immediately before the blade rides on the end surface of the outer peripheral rib wall 16 is constant regardless of the thickness of the blade portion 35.

  If the slope 23 is not provided on the edge 23 of the outer peripheral rib wall 16 and only the vertical surface is provided, the engagement amount α varies depending on the thickness of the blade 35. As shown in FIGS. 9A and 9B, when the blade portion 35 is thick, the amount of engagement α with the vertical surface portion becomes very large, and when the valve 30 is removed, a very large torque is required. there is a possibility.

  In the valve mounting structure 10 according to the present embodiment, by providing the slope 23 b on the edge 23, the engagement amount α immediately before the blade 35 rides on the end surface of the outer peripheral rib wall 16 can be made constant. It is possible to reduce a change in torque required for detachment due to thickness.

  The present invention has been described based on the embodiments. It should be understood by those skilled in the art that these embodiments are exemplifications, and that various modifications can be made to the combination of each component and each processing process, and that such modifications are also within the scope of the present invention.

  DESCRIPTION OF SYMBOLS 10 Valve mounting structure, 12 valve mounting main body part, 13 socket fixture, 14 insertion hole, 15 inner peripheral rib wall, 16 outer peripheral rib wall, 17 notch part, 19 groove part, 20 boss part, 22 protrusion part, 23 edge, 30 Bulb, 31 light emitting part, 32 filament, 34 flange part, 35 blade part, 100 vehicle lamp, 122 reflector.

Claims (6)

A valve mounting structure for mounting a valve to the reflector,
The bulb includes a light-emitting portion, a support portion supporting the light-emitting portion, a flange portion projecting outward from the support portion, and a blade portion protruding from the flange portion,
The reflector includes a cylindrical valve mounting main body, a socket fixture provided at an open end of the valve mounting main body, and the light emitting unit of the bulb provided in the valve mounting main body. A cylindrical inner peripheral rib wall that defines an insertion hole, and a cylindrical outer peripheral rib wall provided outside the inner peripheral rib wall and having a groove formed in a part of the circumferential direction,
When the blade portion is dropped into the groove portion of the outer peripheral rib wall, the flange portion comes into contact with the inner peripheral rib wall and the blade portion comes into contact with the socket fixture. A valve mounting structure fixed to a reflector.   2. The valve mounting structure according to claim 1, wherein the blade is engaged with an edge of the outer peripheral rib wall so that rotation of the valve in the other circumferential direction is restricted.   The edge has a vertical surface extending from an end surface of the outer peripheral rib wall in a direction parallel to an axial direction of the insertion hole, and a slope extending from an end of the vertical surface in a direction inclined with respect to the axial direction. 3. A valve mounting structure according to claim 2, comprising:   4. The method according to claim 1, wherein when the blade is dropped into the groove, a surface of the blade that opposes a surface that comes into contact with the socket fixture does not come into contact with a bottom surface of the groove. The valve mounting structure according to any one of the above.   The valve mounting structure according to any one of claims 1 to 4, wherein the socket fixture is formed of a metal having a low spring property.   A vehicular lamp comprising the bulb mounting structure according to any one of claims 1 to 5.

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