JP2010218769A - Bulb installing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a technology for accurately installing a bulb in a predetermined position to a reflector with a simple constitution. <P>SOLUTION: This bulb installing structure 100 includes a wire spring 42 arranged in an inlet of a bulb insertion hole 6b of the reflector 6, a support part 44 for supporting an end part 42a of the wire spring 42 and a locking part 46 for openably locking an end part 42b of the wire spring 42, and includes a socket fixture part 8 for holding an inserted discharge bulb 10. In the socket fixture part 8, the wire spring 42 presses a side part of the discharger bulb 10 in the crossing direction for crossing with the optical axis direction while locking the end part 42b of the wire spring 42 on the locking part 46, and presses a flange part 30 of the discharge bulb 10 in the optical axis direction, and thereby, the positional relationship between the wire spring 42, the support part 44 and the locking part 46 is determined so as to fix the crossing direction and the optical axis direction of the discharge bulb 10. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a bulb mounting structure in a vehicular lamp used in an automobile or the like.

  Generally, in a vehicular lamp such as a headlamp or a fog lamp, a bulb is held at a predetermined position in a cylindrical insertion hole formed in the bottom of a reflector. Such valve holding is performed by a valve holder provided integrally with or separately from the reflector at the inlet of the insertion hole of the reflector.

  The conventional valve holder has a wire spring as a valve fixing tool for fixing the valve inserted into the insertion port to the reflector. As a technique that employs a wire spring as a valve fixture, for example, there are two rotating shafts extending in a direction perpendicular to the optical axis direction at the lower end of the insertion port, and two extending from the rotating shaft in a direction perpendicular to the rotating shaft direction. What is provided with the wire spring which has an arm part is known (refer patent document 1). In this prior art, the rotating shaft portion of the wire spring is rotated in the direction around the axis, and the arm portion is pressed against the back surface of the bulb inserted into the insertion port to urge the bulb forward in the optical axis direction. The valve was fixed to the reflector.

JP 9-270201 A

  However, in order to fully demonstrate the performance of the bulb in the vehicle lamp, in other words, in order to fully demonstrate the light distribution performance of the lamp, not only the position of the bulb in the optical axis direction but also the optical axis It is desirable that the valve is fixed at a predetermined position with respect to the reflector even in a direction perpendicular to the direction.

  In contrast, in the prior art, the back of the bulb was urged forward in the optical axis direction by the wire spring, so positioning in the optical axis direction could be performed with high precision. However, for positioning in the direction perpendicular to the optical axis direction, There was room for improvement from the viewpoint of further improving the light distribution performance. As a method of positioning the bulb in the direction perpendicular to the optical axis direction, a wedge member is inserted into the gap between the insertion port and the bulb, and the bulb is pressed against the side surface of the insertion port, so that the bulb is moved in the direction perpendicular to the optical axis direction. A fixing method can be considered. However, in this case, since a wedge member is required as a valve fixture in addition to the wire spring, there is a problem that the number of parts increases and the structure becomes complicated.

  The present invention has been made based on such recognition by the inventor, and an object of the present invention is to provide a technique for accurately attaching a valve to a predetermined position with respect to a reflector with a simple configuration.

  In order to solve the above-described problems, a valve mounting structure according to an aspect of the present invention is a valve mounting structure in which a valve is mounted at a predetermined position with respect to a reflector in which a cylindrical insertion hole into which a valve is inserted is formed at the bottom. A substantially string-like elastic member provided at the entrance of the insertion hole, a support portion that supports one end side of the elastic member, and a locking portion that releasably locks the other end side of the elastic member; A valve holding portion that holds the inserted valve, and the valve holding portion is in a state where the elastic member protrudes from the insertion hole in a state where the other end side of the elastic member is locked to the locking portion. The elastic member, the support portion, and the engagement member are fixed so that the crossing direction of the bulb and the optical axis direction are fixed by pressing the portion in the crossing direction that intersects the optical axis direction and pressing the flange portion of the bulb in the optical axis direction. The positional relationship of the stop is determined The features.

  According to this aspect, the valve can be accurately attached to the reflector with respect to the reflector with a simple configuration.

  In the above aspect, the elastic member may be wound around the side portion of the valve and the flange portion with tension using the support portion as a fulcrum, and the other end side may be locked to the locking portion. According to this, the valve can be accurately attached to the reflector at a predetermined position with a simple operation.

  Moreover, in the said aspect, the range which an elastic member and the side part of a valve | bulb contact may be below the half circumference of the side part of a valve | bulb. According to this, the positioning accuracy in the crossing direction of the discharge bulb can be improved.

  In the above aspect, at least one of the support portion and the locking portion may be displaced forward in the optical axis direction with respect to the contact surface between the flange portion of the valve and the elastic member. According to this, the positioning accuracy of the discharge bulb in the optical axis direction can be improved.

  In the above aspect, the elastic member may be provided with a conductive portion that is electrically connected to the starter cover of the discharge valve. According to this, since the discharge valve integrated with the starter is electrically connected to the starter cover with a simple configuration, noise countermeasures via the starter cover are possible.

  According to the present invention, the valve can be accurately attached to the reflector with respect to the reflector with a simple configuration.

1 is a schematic vertical sectional view of a vehicular lamp provided with a valve mounting structure according to Embodiment 1. FIG. It is the disassembled perspective view seen from the upper left back of the valve | bulb attachment structure which concerns on Embodiment 1. FIG. It is a schematic rear view of a valve mounting structure. FIG. 4A is a schematic rear view of the valve mounting structure, and FIG. 4B is a schematic perspective view of the valve mounting structure as viewed from the upper left rear. FIG. 5A is a schematic left side view of the valve mounting structure, and FIG. 5B is a schematic right side view of a part of the valve mounting structure. FIG. 6A is a schematic rear view of the valve mounting structure according to the second embodiment, and FIG. 6B is a schematic perspective view of the valve mounting structure as viewed from the upper left rear. FIG. 7A is a schematic perspective view of the valve mounting structure according to the third embodiment as viewed from the upper left rear, and FIG. 7B is a schematic left side view of the valve mounting structure. FIG. 8A is a schematic perspective view of the valve mounting structure according to the modification as seen from the lower right rear side, and FIG. 8B is a schematic right side view of the valve mounting structure.

  The present invention will be described below based on preferred embodiments with reference to the drawings. The same or equivalent components, members, and processes shown in the drawings are denoted by the same reference numerals, and repeated descriptions are omitted as appropriate. The embodiments do not limit the invention but are exemplifications, and all features and combinations thereof described in the embodiments are not necessarily essential to the invention.

(Embodiment 1)
FIG. 1 is a schematic vertical sectional view of a vehicular lamp provided with a valve mounting structure according to the first embodiment. Hereinafter, the irradiation direction of the lamp (left side in FIG. 1) will be described as the front of the lamp, and the opposite side (right side in FIG. 1) will be described as the rear of the lamp. Further, the right side of the lamp is called the right side of the lamp and the left side is called the left side of the lamp. FIG. 1 shows a cross section of a vehicular lamp 1 cut by a vertical plane including the optical axis X of the lamp, as viewed from the left side of the lamp.

  As shown in FIG. 1, the vehicular lamp 1 includes a lamp body 2 that opens toward the front, and a translucent cover 4 is attached to the lamp body 2 so as to cover the front opening. Is formed. A reflector 6 is provided in the lamp chamber 3 so as to be tiltable with respect to the lamp body 2. Specifically, the reflector 6 includes an adjusting screw 2a rotatably supported by the lamp body 2, a shaft 2b, a leveling actuator 2c that moves the shaft 2b back and forth, and a rotation fulcrum portion (not shown). 2 is supported. The reflector 6 is moved relative to the lamp body 2 by the rotation of the adjusting screw 2a during initial adjustment of the optical axis X of the lamp, and by driving the leveling actuator 2c when correcting the inclination of the optical axis X due to the inclination of the vehicle. Is tilted appropriately.

  The reflector 6 has a rotary parabolic reflecting surface 6a with the optical axis X of the lamp as the central axis. A cylindrical valve insertion hole 6b centered on the optical axis X is formed at the rear center (bottom) of the reflector 6. The reflector 6 also has an annular socket fixture 8 (valve holding part) at the inlet of the valve insertion hole 6b. Note that the socket fixture unit 8 may be separate from the reflector 6.

  The socket fixture 8 is formed with a cylindrical bulb insertion hole 8a centered on the optical axis X, and the discharge bulb 10 is inserted into the reflector 6 through the bulb insertion hole 8a and bulb insertion hole 6b from the rear of the lamp. On the other hand, it is detachably attached. The discharge bulb 10 is held at a predetermined position in the bulb insertion hole 6 b of the reflector 6 by the socket fixture 8. This predetermined position is set as a position where the optical axis of the discharge bulb 10 is made to coincide with the optical axis X and the light emitting portion of the discharge bulb 10 is made to coincide with the focal position of the reflector 6.

  The discharge bulb 10 is a discharge bulb (so-called HID lamp: High Intensity Discharge Lamp) using arc discharge such as a metal halide bulb including a bulb body 10a and a base portion 10b that supports the bulb body 10a. At the tip of the discharge bulb 10, a shade 12 that cuts light emitted directly forward from the discharge bulb 10 is provided. In addition, an extension member 14 having an opening in the region where the reflector 6 exists is fixed to the lamp body 2 or the translucent cover 4, so that the region between the front opening of the lamp body 2 and the reflector 6 is directed forward. Covered.

  An opening 16 is formed at the center of the rear part of the lamp body 2 and corresponding to the bulb insertion holes 6b, 8a. The discharge bulb 10 is attached to and detached from the reflector 6, and the power supply socket to be described later is attached to and detached from the discharge bulb 10. Can be implemented through the opening 16. The opening 16 is closed by a removable cover 18.

  A lighting circuit unit 20 is disposed below the lamp chamber 3, and a lighting circuit of the lighting circuit unit 20 and a power supply socket 22 that supplies power to the discharge bulb 10 are connected by a cord 24. The power supply socket 22 is detachably attached to the base portion 10b of the discharge bulb 10, and the power supply socket 22 is attached to the base portion 10b of the discharge bulb 10 so that power can be supplied from the lighting circuit unit 20 to the discharge bulb 10. It becomes.

  Next, the valve mounting structure according to the first embodiment will be described in detail. FIG. 2 is an exploded perspective view of the valve mounting structure according to the first embodiment when viewed from the upper left rear. FIG. 3 is a schematic rear view of the valve mounting structure. FIG. 4A is a schematic rear view of the valve mounting structure, and FIG. 4B is a schematic perspective view of the valve mounting structure as viewed from the upper left rear. FIG. 5A is a schematic left side view of the valve mounting structure, and FIG. 5B is a schematic right side view of a part of the valve mounting structure. 2 is a view when the wire spring 42 is in an open state, and FIG. 3 is a view when the wire spring 42 is in a locked state. Moreover, in FIG. 4 (A) and FIG. 4 (B), the wire spring 42 in the open state is indicated by a thick black broken line. In FIG. 4A, the presser plate 44b is not shown for the sake of explanation.

  The bulb mounting structure 100 is for mounting the discharge bulb 10 at a predetermined position with respect to the reflector 6 in which a cylindrical bulb insertion hole 6b into which the discharge bulb 10 is inserted is formed at the bottom. A cut portion 8 is provided.

  First, the structure of the discharge bulb 10 will be described. As shown in FIG. 2, the discharge bulb 10 includes a bulb body 10a and a base portion 10b that supports the bulb body 10a. A flange portion 30 is formed on the base portion 10b. A cutout portion 32 for positioning the discharge bulb 10 around the optical axis X is formed at the upper end portion of the flange portion 30, and the discharge bulb is located slightly to the right of the upper end portion of the flange portion 30. A notch 34 for identifying the specification is formed. The base portion 10b is formed with a large-diameter portion 36 that protrudes from the bulb insertion hole 8a in a state where the discharge bulb 10 is inserted into the bulb insertion holes 6b and 8a. The large-diameter portion 36 is electrically connected to the power supply socket 22 and has a base portion 38 for transmitting the power supplied from the lighting circuit unit 20 to the bulb body 10a.

  Next, the structure of the socket fixture unit 8 will be described. As shown in FIGS. 2 and 3, the socket fixture portion 8 is provided at the inlet of the valve insertion hole 6 b of the reflector 6, and includes a main body portion 40, a wire spring 42 (elastic member), a support portion 44, and an engagement member. A stop 46 and a spring retainer 48 are included. The socket fixture portion 8 crosses the optical axis direction at the side of the discharge bulb 10 where the wire spring 42 protrudes from the bulb insertion hole 8a in a state where the end portion of the wire spring 42 is locked to the locking portion 46. While pressing in the intersecting direction and pressing the flange portion 30 of the discharge bulb 10 in the optical axis direction, the wire spring 42 and the support portion 44 are fixed so that the intersecting direction of the discharge bulb 10 and the optical axis direction are fixed. And the positional relationship with the latching | locking part 46 is defined. Details will be described below.

  The main body 40 is a cylindrical member that is provided at the peripheral edge of the bulb insertion hole 6b of the reflector 6 and projects rearward of the lamp, and a bulb insertion hole 8a is formed at the center thereof. The main body portion 40 is formed with a bulb mounting seat 40a for positioning the discharge bulb 10 by contacting the flange portion 30 of the discharge bulb 10 at the peripheral portion of the bulb insertion hole 8a.

  The valve mounting seat 40a of the socket fixture 8 includes an annular surface 40b, a positioning convex portion 40c, a positioning peripheral wall 40d, a positioning key 40e, and an identification key 40f. The annular surface 40b faces the flat surface of the flange portion 30 on the front side of the lamp in a state where the discharge bulb 10 is inserted into the bulb insertion hole 8a. The positioning convex portion 40c is a triangular convex portion formed on the annular surface 40b with an equiangular (120 °) interval around the optical axis X, and the discharge bulb 10 is brought into contact with the flange portion 30 so that the discharge bulb 10 Ten positionings in the optical axis direction are performed. In the present embodiment, three positioning convex portions 40c are provided. In addition, the shape of the positioning convex part 40c, the number of installation, and arrangement | positioning are not specifically limited.

  The positioning peripheral wall 40d is a peripheral wall having a slightly larger diameter than the outer peripheral surface of the flange portion 30 of the discharge bulb 10. The positioning peripheral wall 40d is formed from the annular surface 40b to the rear end surface 40g of the main body 40. On the positioning peripheral wall 40d, a notch 40d1 and a notch 40d2 having a predetermined width are formed in the vicinity of the support portion 44 and the locking portion 46, respectively. In addition, positioning portions 40d3 are formed on the positioning peripheral wall 40d at equiangular (90 °) intervals around the optical axis X.

  The positioning key 40e is a convex part for engaging with the notch 32 of the discharge bulb 10 and positioning the discharge bulb 10 around the optical axis. The identification key 40f is a convex portion for engaging with the notch 34 of the discharge bulb 10 to identify the specification of the discharge bulb 10. Further, the rear end surface 40g of the main body 40 is flush with the flat surface on the rear side of the lamp of the flange portion 30 in a state where the flange portion 30 of the discharge bulb 10 is in contact with the positioning convex portion 40c of the socket fixture portion 8. It is set to be. A cutout portion 40 h is provided on a part of the outer peripheral surface of the main body portion 40.

  A spring pressing portion 48 is provided in the vicinity of the support portion 44 on the rear end surface 40 g of the main body portion 40. The spring pressing portion 48 has an end portion side pressing surface 48a and a curved portion side pressing surface 48b. The spring retainer 48 regulates the movable range of the wire spring 42, and contacts the end-side retainer surface 48a when the wire spring 42 transitions to the locked state, as will be described later, and the wire spring 42 is in an open state. Is set so as to abut against the bending portion side pressing surface 48b.

  The wire spring 42 is a substantially string-like elastic member, and is an end portion 42a connected to the support portion 44 and an end portion on the opposite side to the end portion 42a, and is releasably locked to the locking portion 46. The edge part 42b is provided with the curved part 42c which connects the edge part 42a and the edge part 42b. As shown in FIG. 4A, the end portion 42a is connected to the support portion 44 so as to be wound around a support shaft (to be described later) of the support portion 44, and the wire spring 42 rotates with the support portion 44 as a fulcrum. It is possible to move. The end portion 42b has a substantially U-shape with its front end bent, and this U-shaped portion is hooked on a locking claw described later of the locking portion 46 so that the wire spring 42 is locked. 46 is locked.

  The curved portion 42c is curved so as to substantially follow the inner peripheral surface above the valve insertion hole 8a. As shown in FIGS. 2, 4 (A), and 4 (B), when the wire spring 42 is in an open state, the curvature inside the curved portion 42 c is the curvature of the side surface of the large-diameter portion 36 of the discharge bulb 10. It is set to be smaller. Further, as shown in FIGS. 3, 5A, and 5B, the curved portion 42c includes two optical axis direction urging portions 42c1 that abut against the lamp rear flat surface of the flange portion 30, and Between the two optical axis direction urging portions 42c1, an inclined portion 42c2 that extends obliquely toward the lamp rear side from the lamp rear side flat surface of the flange portion 30 is included.

  The support portion 44 includes a support shaft 44a and a presser plate 44b. As shown in FIG. 3, the support shaft 44 a is provided on the lower right side of the main body 40 when viewed from the rear of the lamp. Further, as shown in FIG. 5 (B), the support shaft 44a extends in a direction parallel to the optical axis direction from the offset surface 49 shifted forward of the lamp from the rear end face 40g of the main body 40 toward the rear of the lamp. So as to protrude. The support shaft 44a has a shaft head portion 44a1 having a diameter larger than that of other portions at the end opposite to the offset surface 49. The presser plate 44b has an insertion port at the center, and a support shaft 44a is inserted into the insertion port. The wire spring 42 is wound around the support shaft 44a between the offset surface 49 and the presser plate 44b. The presser plate 44b prevents the wire spring 42 from falling off the support shaft 44a, and the wire spring 42 is deformed. Is preventing. The support shaft 44a and the presser plate 44b may be integrated.

  The locking part 46 includes a base part 46a and a locking claw 46b. The base portion 46a is a plate-like member that is attached to the side surface of the main body portion 40 and extends in the left-right direction of the lamp. The base portion 46a has a locking claw 46b protruding from the upper surface of the end portion on the side opposite to the region where the support portion 44 is present among the end portions in the left-right direction. The locking claw 46b protrudes upward from the upper surface of the base portion 46a and has a tip extending forward of the lamp, and has a substantially arc-shaped inner surface. The end 42b of the wire spring 42 in the locked state abuts against the inner surface of the locking claw 46b, whereby the transition of the wire spring 42 to the open state is restricted. Therefore, the wire spring 42 is locked to the locking portion 46 on the lower left side of the main body 40 when viewed from the rear of the lamp.

  The wire spring 42 can take a locked state in which the end 42 b is locked to the locking portion 46 against the elastic force and an open state in which the end 42 b is released from the locking portion 46. . When the wire spring 42 in the open state is rotated with the support portion 44 as a fulcrum so as to be locked, the end portion 42a abuts against the end-side pressing surface 48a of the spring pressing portion 48 at a predetermined position. When a force for further rotation is applied after the end 42 a comes into contact with the end-side pressing surface 48 a, the wire spring 42 is elastically deformed and the end 42 b reaches the locking portion 46. And the end part 42b is hooked by the latching claw 46b, and the wire spring 42 will be in a latching state. In the locked state, the wire spring 42 is such that the optical axis direction urging portion 42c1 of the curved portion 42c abuts on the flat surface behind the lamp of the flange portion 30, and the inclined portion 42c2 of the wire spring 42 is the large diameter portion of the discharge bulb 10. It abuts on the side surface of 36.

  When the end portion 42b is removed from the locking portion 46, the wire spring 42 is rotated by its own elastic force in the direction in which the end portion 42b moves away from the locking portion 46 with the support portion 44 as a fulcrum. In the open state, the wire spring 42 has the optical axis direction urging portion 42 c 1 spaced apart from the lamp rear flat surface of the flange portion 30 toward the lamp rear, and the inclined portion 42 c 2 separated from the side surface of the large diameter portion 36. When the wire spring 42 in the locked state is rotated with the support portion 44 as a fulcrum so as to be in an open state, the curved portion 42c comes into contact with the curved portion side pressing surface 48b of the spring pressing portion 48 at a predetermined position, and further rotates. Is regulated.

  Here, when the wire spring 42 is in the locked state, the inner side surface of the bending portion 42 c is bent along the side surface of the large-diameter portion 36 of the discharge bulb 10 due to elastic deformation. As shown in FIG. 3, when the wire spring 42 is locked without inserting the discharge bulb 10, the inner surface of the curved portion 42c is inside the inner peripheral surface of the bulb insertion hole 8a. It is set to pass through. Therefore, when the discharge bulb 10 is inserted into the bulb insertion holes 6b and 8a and the wire spring 42 is in the locked state, the side surface of the large diameter portion 36 intersects the optical axis (downward in FIG. 3). Will be energized. As a result, the discharge bulb 10 can be positioned in the crossing direction.

  Further, the wire spring 42 is locked to the locking portion 46 by the curved portion 42 c extending from the support portion 44 being wound around the large diameter portion 36 of the discharge bulb 10. At this time, the range in which the wire spring 42 and the large diameter portion 36 of the base portion 10 b contact each other is equal to or less than a half circumference of the side portion of the large diameter portion 36. Therefore, the force by which the wire spring 42 presses the side surface of the large-diameter portion 36 is not dispersed, and a larger urging force can be applied to the discharge bulb 10, and the urging direction of the discharge bulb 10 is also determined in a certain direction. be able to. Thereby, the positioning accuracy in the crossing direction of the discharge bulb can be improved.

  When the wire spring 42 is in the locked state, the urging portion 42c1 in the optical axis direction of the curved portion 42c abuts the flat surface on the rear side of the lamp portion of the flange portion 30, so that the flat surface on the front side of the lamp portion of the flange portion 30 is stabilized. It can be made to contact with the positioning convex part 40c of the valve mounting seat 40a. As a result, the positioning accuracy of the discharge bulb 10 in the optical axis direction can be increased.

  Further, as shown in FIG. 5A, the end portion 42b of the wire spring 42 in the locked state and the locking claw 46b of the locking portion 46 are slightly smaller than the flat surface of the flange portion 30 on the rear side of the lamp. Are in contact with each other at a position shifted forward of the lamp. That is, the locking portion 46 is displaced forward in the optical axis direction with respect to the contact surface between the flange portion 30 and the urging portion 42c1 of the bending portion 42c. Further, as shown in FIG. 5B, the end 42a is wound around the support shaft 44a at a position slightly shifted forward of the lamp from the flat surface of the flange 30 on the rear side of the lamp. That is, the support portion 44 is displaced forward in the optical axis direction with respect to the contact surface between the flange portion 30 and the urging portion 42c1 of the bending portion 42c. Therefore, the optical axis direction urging portion 42c1 can urge the flange portion 30 forward with a stronger urging force. Thereby, the positioning accuracy in the optical axis direction of the discharge bulb 10 can be further improved.

  Note that not only when both the support portion 44 and the locking portion 46 are displaced forward in the optical axis direction, but also when either one of the support portion 44 and the locking portion 46 is displaced forward in the optical axis direction. The effect of improving positioning accuracy can be obtained. It is necessary to shift both of the support portion 44 and the locking portion 46, or only one of them, or to shift only one of the support portion 44 and the locking portion 46. The positioning accuracy can be appropriately selected according to the positioning accuracy and design convenience. Here, the distance in the optical axis direction from the contact surface between the flange portion 30 and the wire spring 42 to the support portion 44 is a, and the optical axis from the contact surface between the flange portion 30 and the wire spring 42 to the locking portion 46. It is assumed that the distance in the direction is b, the distance is positive in front of the lamp with respect to the contact surface, and the distance is negative in the rear of the lamp with respect to the contact surface. In this case, in order to improve the positioning accuracy of the discharge bulb 10 in the optical axis direction, the distance a from the contact surface to the support portion 44 and the distance b from the contact surface to the locking portion 46 satisfy a + b> 0. It is desirable to satisfy the relationship. Note that the support portion 44 and the locking portion 46 may be displaced from each other in the optical axis direction.

The discharge bulb 10 is attached to the socket fixture 8 as follows.
First, as shown in FIG. 2, the discharge bulb 10 is inserted into the bulb insertion hole 8a and the bulb insertion hole 6b from the rear of the lamp with the end 42b of the wire spring 42 detached from the locking portion 46. At that time, the flange portion 30 of the discharge bulb 10 is inserted into the socket fixture portion 8 so that the notch portion 32 engages with the positioning key 40e of the socket fixture portion 8 and the notch portion 34 engages with the identification key 40f. To do. As a result, the discharge bulb 10 is positioned in the rotational direction about the optical axis X. The flange portion 30 of the discharge bulb 10 is positioned in the optical axis direction by the flat front surface of the lamp abutting against the positioning convex portion 40c of the bulb mounting seat 40a. Moreover, the flange part 30 is hold | maintained in the position where the outer peripheral surface opposes the positioning surrounding wall 40d. The wire spring 42 is supported by the support portion 44 in a state where no external force is applied.

  Subsequently, as shown in FIG. 4A, the open wire spring 42 (shown by a thick black broken line) is rotated in the direction of arrow A with the support portion 44 as a fulcrum. When the wire spring 42 rotates to a predetermined position, the end 42 a comes into contact with the end-side pressing surface 48 a of the spring pressing portion 48. When the wire spring 42 is further rotated with the end portion 42a of the wire spring 42 in contact with the end-side pressing surface 48a, the curved portion 42c is elastically deformed, and the inclined portion 42c2 contacts the side surface of the large-diameter portion 36. Touch. Then, the side surface of the large-diameter portion 36 is pressed from above by the inclined portion 42c2, and the flange portion 30 of the discharge bulb 10 is urged downward. Thereby, the outer peripheral surface of the flange part 30 contacts the positioning part 40d3 of the positioning peripheral wall 40d with a biasing force. As a result, the discharge bulb 10 is accurately positioned in a direction that intersects (perpendicular to) the optical axis direction.

  Further, as the inclined portion 42c2 comes into contact with the side surface of the large diameter portion 36, the optical axis direction biasing portion 42c1 comes into contact with the lamp rear flat surface of the flange portion 30. When the end 42b of the wire spring 42 is brought close to the locking portion 46, the flat surface on the rear side of the lamp 30 is pressed from the rear of the lamp by the optical axis urging portion 42c1, and the flange portion of the discharge bulb 10 is pressed. 30 is urged forward of the lamp. Thereby, the lamp | ramp front side flat surface of the flange part 30 contact | abuts with the urging | biasing force on the positioning convex part 40c formed in the annular surface 40b. As a result, the discharge bulb 10 is accurately positioned in the optical axis direction.

  Thus, after the wire spring 42 is applied around the side portion of the discharge bulb 10 and the flange portion 30 with the support portion 44 as a fulcrum, the end portion 42b of the wire spring 42 is engaged with the engagement claw of the engagement portion 46. It is hooked by 46b, and the attachment to the socket fixture part 8 of the discharge bulb 10 is completed.

  When the operation according to the configuration described above is summarized, in the valve mounting structure 100 according to the present embodiment, one end of the wire spring 42 is supported by the support portion 44 and the other end is locked by the locking portion 46. The spring 42 presses the side surface of the large-diameter portion 36 of the discharge bulb 10 in the intersecting direction intersecting the optical axis direction, and presses the flange portion 30 of the discharge bulb 10 in the optical axis direction. Therefore, according to the bulb mounting structure 100 according to the present embodiment, the discharge bulb 10 can be accurately positioned in the intersecting direction and the optical axis direction with only the wire spring 42. Therefore, the discharge bulb can be accurately attached to the reflector with respect to the reflector with a simple configuration without increasing the number of parts.

  Further, the wire spring 42 is engaged with the engaging portion 46 by being tensioned around the side surface of the large-diameter portion 36 of the discharge bulb 10 and the flange portion 30 with the support portion 44 as a fulcrum. Therefore, the discharge bulb 10 can be pressed against the optical axis direction and the crossing direction by a simple method of rotating the wire spring 42 and hooking it on the locking portion 46. Therefore, the assembly work efficiency of the discharge bulb 10 is improved. Moreover, the work space when fixing the discharge bulb 10 to the reflector 6 can be reduced.

  In addition, when the wire spring 42 is in the locked state, the range where the wire spring 42 and the large diameter portion 36 of the discharge bulb 10 are in contact is less than or equal to a half circumference of the side surface of the large diameter portion 36. Therefore, the force that presses the large-diameter portion 36 is not dispersed, a larger urging force can be applied to the discharge bulb 10, and the urging direction of the discharge bulb 10 can be made constant. Thereby, the positioning accuracy of the discharge bulb 10 in the crossing direction can be improved. Further, at least one of the support portion 44 and the locking portion 46 is displaced forward of the lamp relative to the contact surface between the flange portion 30 and the wire spring 42. Therefore, the flange portion 30 of the discharge bulb 10 can be urged forward with a stronger urging force. Thereby, the positioning accuracy of the optical axis direction of the discharge bulb 10 can be improved.

(Embodiment 2)
The valve mounting structure according to the second embodiment is different from the first embodiment in that a locking surface for preventing the kinking of the wire spring is provided in the locking portion. Hereinafter, this embodiment will be described. The configurations of the vehicle lamp and the discharge bulb to which the bulb mounting structure according to this embodiment can be applied and the other configurations of the bulb mounting structure are the same as those of the first embodiment, and the same configurations as those of the first embodiment are the same. The description will be omitted as appropriate.

  FIG. 6A is a schematic rear view of the valve mounting structure according to the second embodiment, and FIG. 6B is a schematic perspective view of the valve mounting structure as viewed from the upper left rear.

  As shown in FIGS. 6 (A) and 6 (B), the valve mounting structure 100 according to the present embodiment includes a socket fixture portion 8 provided at the entrance of the insertion hole of the reflector 6. The socket fixture portion 8 includes a main body portion 40, a wire spring 42 (elastic member), a support portion 44, a locking portion 46, and a spring pressing portion 48.

  The locking part 46 of this embodiment includes a base part 46a, a locking claw 46b, and a locking surface part 46c. The base portion 46a is a plate-like member that is attached to the side surface of the main body portion 40 and extends in the left-right direction of the lamp. The base portion 46a has a locking claw 46b protruding from the upper surface of the end portion on the side opposite to the region where the support portion 44 is present among the end portions in the left-right direction. The locking claw 46b protrudes upward from the upper surface of the base portion 46a and has a tip extending forward of the lamp, and has a substantially arc-shaped inner surface. The end 42b of the wire spring 42 in the locked state abuts against the inner surface of the locking claw 46b, whereby the transition of the wire spring 42 to the open state is restricted. A locking surface portion 46c projects from the upper surface of the end portion of the base portion 46a. One side (left side in FIG. 4A) of the locking surface portion 46c is continuous with the locking claw 46b, and the other side (right side in FIG. 4A) is the end piece 42a of the wire spring 42. It has a plane extending in the direction and facing the reflector 6. The locking surface portion 46c is in contact with the vicinity of the locking claw 46b of the wire spring 42 in the locked state.

  The wire spring 42 rotates about the support portion 44 as a fulcrum, and the curved portion 42c is wound around the side portion of the large-diameter portion 36 of the discharge bulb 10 and the flange portion 30 with a tension, and then the end portion 42b of the wire spring 42. Is hooked on the locking claw 46 b of the locking portion 46. In this state, in the wire spring 42, the curved portion 42c presses the side surface of the large-diameter portion 36 of the discharge bulb 10 downward, and presses the lamp rear flat surface of the flange portion 30 forward in the optical axis direction. Accordingly, the wire spring 42 receives a force pressing upward from the side surface of the large diameter portion 36 and receives a force pressing backward from the flange portion 30 in the optical axis direction. Therefore, in the vicinity of the locking claw 46b closer to the curved portion 42c than the locking claw 46b, a force in the direction twisted on the rear side of the lamp works with the locking claw 46b as a fulcrum. If the vicinity of the locking claw 46b is twisted rearward in the optical axis direction, the force by which the wire spring 42 presses the discharge bulb 10 in the optical axis direction and the crossing direction may escape.

  On the other hand, in this embodiment, the latching | locking part 46 is provided with the latching | locking surface part 46c, and the latching claw 46b vicinity part of the wire spring 42 in a latching state contact | abuts. Therefore, it can suppress that the said part kinks in the optical axis direction back. Therefore, it is possible to more reliably position the discharge bulb 10 in the optical axis direction and the crossing direction.

  Summarizing the operation according to the configuration described above, in the valve mounting structure 100 according to the present embodiment, the locking portion 46 extends to the end 42a side of the wire spring 42, and the wire spring 42 uses the locking portion 46 as a fulcrum. A locking surface portion 46c that comes into contact with the wire spring 42 is provided so as to prevent kinking. Therefore, according to the present embodiment, in addition to the effects of the first embodiment, there is an effect that the discharge bulb 10 can be more reliably positioned in the optical axis direction and the cross direction.

(Embodiment 3)
The bulb mounting structure according to the third embodiment is different from the first and second embodiments in the structure of the discharge bulb to be applied. Hereinafter, this embodiment will be described. The configuration of the vehicular lamp to which the valve mounting structure according to this embodiment can be applied and the configuration of the valve mounting structure are the same as those in the first embodiment, and the same reference numerals are given to the same configurations as those in the first embodiment. The description will be omitted as appropriate.

  In recent years, a starter circuit for controlling discharge of the discharge bulb may be provided integrally with the bulb. FIG. 7A is a schematic perspective view of the valve mounting structure according to the third embodiment as viewed from the upper left rear, and FIG. 7B is a schematic left side view of the valve mounting structure. In the discharge bulb 10 according to this embodiment, a starter circuit 50 for controlling the discharge is attached to the rear end of the discharge bulb 10. In the case of such a discharge bulb 10, in the conventional configuration in which the wire spring is rotated around an axis extending in a direction perpendicular to the optical axis and the wire spring is pressed against the back surface of the discharge bulb 10, the starter circuit 50 is a wire spring. Since the rotation and the urging force are hindered, the discharge bulb 10 provided with the starter circuit 50 cannot be positioned and attached to the reflector 6 with high accuracy.

  However, the bulb mounting structure according to each of the above embodiments rotates the wire spring around the support shaft extending in the direction parallel to the optical axis to urge the discharge bulb 10 in the optical axis direction and the crossing direction. Therefore, the wire spring can be rotated and brought into contact with the discharge bulb 10 in the space between the rear end surface of the socket fixture portion 8 and the starter circuit 50. Therefore, even if the starter circuit 50 is provided at the rear end of the discharge bulb 10, the starter circuit 50 does not hinder the rotation and urging of the wire spring. Therefore, by adopting the bulb mounting structure according to each of the above-described embodiments, even the discharge bulb 10 including the starter circuit 50 can be accurately attached to the reflector 6 at a predetermined position with a simple configuration. it can.

  In addition, you may provide the leaf | plate spring 42 which concerns on this embodiment with the leaf | plate spring (conductive part) which is not shown in figure. The leaf spring is electrically connected to the reflector 6 via the socket fixture 8. The discharge bulb 10 is configured such that a leaf spring comes into contact with the conductive cover 50a (starter cover) of the starter circuit 50. If the cover 50a of the starter circuit 50 is grounded, the bulb body 10a. It is also possible to block the noise generated by the cover 50a. As a result, it is possible to take measures against noise through the cover 50a with a simple configuration.

  The present invention is not limited to the above-described embodiments, and it is possible to combine the embodiments or to add various modifications such as design changes based on the knowledge of those skilled in the art. Embodiments to which modifications are made are also included in the scope of the present invention. Each of the above-described embodiments and a new embodiment resulting from the combination of each of the above-described embodiments and the following modified examples have the effects of the combined embodiments and modified examples.

(Modification 1)
Examples of the valve mounting structure 100 according to each of the above-described embodiments include the following modifications. FIG. 8A is a schematic perspective view of the valve mounting structure according to the modification as seen from the lower right rear side, and FIG. 8B is a schematic right side view of the valve mounting structure.

In each of the above-described embodiments, as shown in FIG. 5B, the wire spring 42 wound around the support portion 44 has a portion extending from the support portion 44 toward the end portion 42 a curved toward the lamp front side and from the support portion 44. A portion extending toward the portion 42c is arranged on the lamp rear side and intersects. On the other hand, in this embodiment, as shown in FIGS. 8A and 8B, the wire spring 42 wound around the support portion 44 has a portion extending from the support portion 44 toward the end portion 42a. A portion extending from the support portion 44 to the curved portion 42c side is arranged on the front side of the lamp and intersects the rear side. Accordingly, the portion extending from the support portion 44 toward the end portion 42a acts to press the portion extending toward the curved portion 42c toward the front of the lamp. Therefore, the force with which the wire spring 42 presses the discharge bulb 10 can be increased, and the positioning accuracy of the discharge bulb 10 can be further improved.
(Other variations)
In each of the above-described embodiments, the headlamp has been described as a vehicular lamp. However, in other lamps such as a fog lamp, by adopting the same configuration as that of each embodiment, the same functions and effects as those of each embodiment can be obtained. Obtainable.

  X optical axis, 6 reflector, 6b valve insertion hole, 8 socket fixture part, 8a valve insertion hole, 10 discharge valve, 10a valve body, 10b base part, 30 flange part, 36 large diameter part, 42 wire spring, 42a, 42b End part, 42c Bending part, 42c1 Optical axis direction urging part, 42c2 Inclining part, 44 Support part, 44a Support shaft, 44a1 Shaft head, 44b Presser plate, 46 Locking part, 46a Base part, 46b Locking claw 46c Locking surface part, 50 starter circuit, 50a cover, 100 valve mounting structure.

Claims (5)

A valve mounting structure for mounting a valve at a predetermined position with respect to a reflector having a cylindrical insertion hole formed at the bottom thereof into which the valve is inserted,
A substantially string-like elastic member provided at the entrance of the insertion hole; a support portion that supports one end of the elastic member; and a locking portion that releasably locks the other end of the elastic member. A valve holding part for holding the inserted valve;
The valve holding part presses the side part of the valve protruding from the insertion hole in the crossing direction intersecting the optical axis direction while the other end side of the elastic member is locked to the locking part. The positional relationship among the elastic member, the support portion, and the locking portion is determined so that the intersecting direction of the bulb and the optical axis direction are fixed by pressing the flange portion of the optical member in the optical axis direction. Characteristic valve mounting structure.   2. The elastic member according to claim 1, wherein the elastic member is wound around the side portion and the flange portion of the valve with tension using the support portion as a fulcrum, and the other end side is locked to the locking portion. Valve mounting structure.   3. The valve mounting structure according to claim 1, wherein a range of contact between the elastic member and the side portion of the valve is equal to or less than a half circumference of the side portion of the valve.   4. At least one of the support part and the locking part is displaced forward in the optical axis direction with respect to the contact surface between the flange part of the valve and the elastic member. The valve mounting structure described in the section.   The valve mounting structure according to any one of claims 1 to 4, wherein the elastic member is provided with a conductive portion that is electrically connected to a starter cover of a discharge valve.

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