JP2000340316A - Discharge lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect a condition where a bulb is incompletely coupled to a socket with a simple and inexpensive structure without adding any special member or a circuit. SOLUTION: This discharge lamp is equipped with a bulb having a light emitting part to emit light by discharge and a socket 30 to connect the light emitting part to a power source by being coupled to the socket coupling part 20 of the bulb, and the socket 30 is shielded by a socket shielding member composed of a braid 80 and a fixing bracket 50. It is structured so that the socket shielding member gets mountable only when the socket 30 is completely coupled to the socket coupling part 20.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a discharge lamp used for a head lamp of a vehicle.

[0002]

2. Description of the Related Art In recent years, HID (High-Intensity Discharg
e) Discharge lamps such as lamps are attracting attention. This discharge lamp has low power consumption,
It has the advantages of higher luminance and longer life than conventional halogen lamps (for example, Japanese Patent Application Laid-Open No. 9-204).
No. 801).

FIGS. 1 to 12 show an example of the structure. The illustrated discharge lamp includes a bulb 210 and a socket 230 coupled thereto.

[0004] The bulb 210 includes a light emitting section 212, a lamp 2
14 and a shield cover 216 are provided. The light emitting unit 212 extends in the front-rear direction on the tip side of the bulb 210, and emits light by discharge. The lamp 214 has the bulb 21
2 and reflects the light emitted from the bulb 212 forward. The shield cover 216 is a valve 2
The valve 212 is covered from the front with the side 12 exposed.

A rear portion of the valve 210 is provided with a socket connecting portion 22.
0, and the socket 2
30 is detachably fitted. The high voltage electrode 222 and the low voltage electrode 224 of the light emitting section 212 are exposed from the socket coupling section 220. More specifically, the end of the high-voltage electrode 222 is exposed in a ring shape at the rear of the socket coupling portion 220, and the end of the low-voltage electrode 224 is exposed so as to surround the outside thereof in the same ring shape.

The socket 230 has a high voltage socket terminal 2
32 and the low voltage socket terminal 234 are fixed. Electrode contact portions 232b and 234b are formed at the front ends (upper ends in FIG. 2) of these socket terminals 232 and 234, and terminal contact portions 232a and 234a are formed at the rear ends, respectively.
Socket joint 220 between socket 230 and valve 210
Are fitted, the electrode contact portion 232b of the high voltage socket terminal 232 and the electrode contact portion 234b of the low voltage socket terminal 232 are connected to the high voltage electrode 222 and the low voltage electrode 2 respectively.
24, the socket terminals 232 and 234 are arranged.

On the other hand, an electric wire terminal 262 is attached to an end of an electric wire 260 for supplying power to the lamp, and a protruding piece 262a formed on the electric wire terminal 262 has the socket terminals 232 and 234 in the socket 230. Are respectively fitted to the terminal contact portions 232a and 234a. The electric wire 260 and the electric wire terminal 262 are covered by the socket cover 240 from behind.

In FIGS. 1 and 3, reference numeral 290 denotes a switch terminal provided on the socket 230 for detecting whether or not the socket connecting portion 220 and the socket 230 are completely connected.

The socket connecting portion 220 and the socket 23
The fitting structure with 0 is as follows. As shown in FIG. 9, two projections 227 projecting in the radial direction are formed at 180 ° intervals on the outer peripheral surface of the socket coupling portion 220. On the other hand, four fitting grooves 237 are formed at 90 ° intervals on the outer peripheral wall of the socket 230. Each fitting groove 237 extends in the circumferential direction from a projection inlet 237a opened to an axial end of the socket 230, and the terminal end thereof is a projection 227.
Is a small width portion 237b so small that it cannot enter. In other words, the protrusion 227 can enter the fitting groove 237 in the circumferential direction up to a position immediately before the small width portion 237b.

The reason why the number of the fitting grooves 237 is larger than the number of the protrusions 227 is that the mounting angle of the socket 230 with respect to the socket connecting portion 220 can be changed at 90 ° intervals.

Next, the shield structure of the lamp will be described. Each electric wire 260 has a braid 280 made of copper or the like.
A fixing bracket 282 is fixed to an end of the braid 280 by means such as caulking.
On both side walls of the fixing bracket 282, contact spring pieces 283 extending from both sides to both outsides are formed. The fixing bracket 282 is attached to the electric wire introduction port of the socket 230, and a shield cover 250 having a shape covering the entire socket 230 is attached to the socket 230, and the inner surface of the shield cover 250 and the fixing
By contacting the spring piece 283 of 82, a shield structure is formed from the socket 230 to the electric wire 260, which covers these in series.

Next, the procedure for assembling the lamp will be described.

As shown in FIG. 3, a high voltage terminal 232, a low voltage terminal 234,
6 and the switch terminal 290 are attached.

Each wire 260 shown in FIG. 4 is set in the wire groove 238 in the socket shown in FIG.
2 are connected to the socket terminals 232 and 234. And
A sealing member 270 shown in FIG. 5 is fitted from above, and this is further covered with a socket cover 240 shown in FIG.

As shown in FIG. 7, the electric wire introduction portion 239 of the socket 230 and the electric wire introduction portion 2 of the socket cover 240
A braid fixing bracket 282 fixed to the end of the braid 280 is externally fitted to and fixed to the portion where 49 is fitted (the state of FIG. 8). The braid 280 is connected to ground through a circuit (not shown).

The socket 230 is fitted into the socket connecting portion 220 as shown in FIGS. First, each protrusion 227 has its protrusion entrance 237 in an appropriate fitting groove 237.
The socket 230 and the socket connecting portion 220 are fitted in the axial direction so as to enter in the axial direction from a, and are temporarily fitted (FIG. 9 → FIG. 10). Next, by rotating the socket 230 relatively with respect to the socket coupling portion 220, the projection 2
27 is inserted into the fitting groove 237 in the circumferential direction to the depth of the fitting groove 237 (to a position immediately before the small width groove 237b) and is fully fitted (FIG. 1).
1).

As shown in FIG. 12, the shield cover 250 shown in FIG.
At the position to cover from outside. At this time, the notch 258a of the contact portion 258 formed on the socket shield cover 250 and the spring piece 218a formed on the contact portion 218 of the valve shield cover 216 engage with each other. Braid fixing bracket 2
When the spring pieces 283 of the pair 82 come into contact with each other, the shield covers 216 and 250 are connected to the ground together with the braid fixture 282 and the braid 280. Thereby, the bulb 210, the socket 230, and the electric wire 260
Are continuously shielded.

[0018]

In the discharge lamp, for example, if the connection between the socket connecting portion 220 of the bulb 210 and the socket 230 is erroneously left in a temporarily fitted state, these socket connecting portions 220 and Socket 2
30 is shifted in the axial direction due to the vibration of the vehicle, etc.
22 and 224 and the socket terminals 232 and 234 may be separated from each other. Here, since a high voltage is supplied to the electrode and the socket terminal, an arc is generated when the electrode and the socket terminal are separated from each other, which may damage these electrodes and the socket terminal.

Conventionally, a means for detecting incomplete fitting is provided by providing the switch terminal 290 as described above, but a special structure and circuit are required for the detection. A major hindrance to cost reduction.

In view of such circumstances, the present invention provides a discharge lamp capable of reliably detecting an incompletely connected state between a bulb and a socket with a simple and low-cost structure without adding any special members or circuits. The purpose is to provide.

[0021]

As a means for solving the above problems, the present invention provides a bulb having a light emitting portion which emits light by discharging, and connecting the light emitting portion to a power source by being connected to the bulb. A socket and a socket shield member mounted on the socket or valve so as to cover the socket, and the socket shield member can be mounted only in a state where the valve and the socket are completely connected. It is configured so that

According to this configuration, when the socket and the valve are not completely connected, the socket shield member cannot be mounted on the socket or the valve. You can know that. Therefore, the incompletely connected state of the valve and the socket can be reliably detected by effectively utilizing the socket or the socket shield member mounted on the valve without using any special member or circuit.

For example, in the case of a fitting structure in which the socket and the valve are temporarily fitted in the axial direction and then the socket and the valve are fully fitted by rotating the two relative to each other, At this angular position, the socket shield member cannot be mounted, and the socket shield member can be mounted at the main fitting angular position.

Specifically, one of the socket and the valve is provided with a protruding portion, and the other is formed with a protruding portion which is protruded in the axial direction of the socket and the valve and then is formed into a shape capable of being protruded in the circumferential direction. If the groove is provided, after the provisional fitting in which the protrusion enters the fitting groove in the axial direction is completed, the socket and the valve are relatively rotated to rotate the protrusion around the fitting groove. The main fitting can be achieved by entering in the direction.

In this fitting structure, as a means for mounting the socket shield member only in the fully fitted state and not being able to be mounted in the temporary fitted state, for example, the socket and the socket shield member may be mounted. A positioning portion for determining a relative angle between the two is provided, and the socket shield member is engaged with the valve side in a state where the socket and the socket shield member exist at the relative angle position determined by the angle positioning portion. do it.

In addition, the bulb is provided with a valve shield member for covering the light emitting portion in a partially exposed state, and the valve shield member and the socket shield member are provided only when the socket and the bulb are completely connected. If the shield member is configured to be directly engageable, both the valve shield member and the socket shield member can be reliably grounded with a simple structure, and a more preferable shield structure can be constructed.

In the present invention, the term "socket shield member" does not necessarily mean that it covers only the socket, but also includes that which covers both the socket and the electric wire connected thereto. For example, a conductor braid that covers the socket shield member over the socket and the electric wire connected thereto is provided at an end of the conductor braid, and is provided only when the bulb and the socket are completely connected. With the mounting portion that can be mounted on the valve or the socket, the number of components is reduced and the assembling operation is simplified as compared with the conventional structure in which the electric wire and the socket are shielded by separate members. Further, if the conductor braid is connected to the ground, both the socket and the electric wire can be reliably shielded by the conductor braid, so that the reliability is high.

The shield braid does not necessarily cover the entire length of the electric wire, but may cover only a portion of the electric wire relatively close to the socket.

In the case of using a braid as described above,
The bulb is provided with a bulb shield member that covers the light-emitting portion in a state where a part thereof is exposed, while the mounting portion provided at the end of the conductor braid is formed of a conductor, and the socket and the bulb are completely coupled. It is more preferable that the mounting portion and the valve shield member can be directly engaged only in the closed state.

[0030]

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

The illustrated discharge lamp includes a bulb 10 and a socket 30 connected thereto.

The bulb 10 includes a light emitting section 12, a lamp 14,
And a shield cover (valve shield member) 16. The light emitting unit 12 extends in the front-rear direction on the distal end side of the bulb 10 and emits light by discharge. The lamp 14 is located immediately behind the bulb 12 and reflects light emitted from the bulb 12 forward. The shield cover 16 covers the bulb 12 from the front while exposing the bulb 12 to the side.

The rear part of the valve 10 is a socket connecting part 2
0, so that the socket 30 is detachably fitted to the socket coupling portion 20. The high voltage electrode 2 of the light emitting unit 12 is
2 and the low voltage electrode 24 are exposed.

Specifically, a recess is formed in the center of the rear portion (the right side portion in FIG. 13, and the upper portion in FIG. 17) of the socket connecting portion 20, and a projecting column 23 is formed in the center of the recess. The end of the high-voltage electrode 22 is exposed in a ring shape on the outer peripheral surface of the column 23, and the end of the low-voltage electrode 24 is exposed on the outer peripheral surface of the socket coupling portion 30 so as to surround the outside in the same ring shape. A pair of contact portions 18 extending from the shield cover 16 are provided on the rear surface of the socket coupling portion 20.
Are exposed, and these contact portions 18 are formed with spring pieces 18a projecting rearward.

The socket 30 has a high voltage socket terminal 32
And the low voltage socket terminal 34 is fixed. Electrode contact portions 32b and 34b are formed at the front ends (upper end portions in FIG. 14) of these socket terminals 32 and 34, and terminal contact portions 32a and 34a are formed at the rear ends thereof. The socket terminals 32 and 34 are connected so that the electrode contact portion 32b of the high-voltage socket terminal 32 and the electrode contact portion 34b of the low-voltage socket terminal 32 contact the high-voltage electrode 22 and the low-voltage electrode 24, respectively, in a state where the portion 20 is connected. Are located. A sealing member (insulating member) 36 made of rubber or the like is provided between the high-voltage socket terminal 32 and the low-voltage socket terminal 34 for electrically sealing the two terminals.

Rear part of socket 30 (lower part in FIG. 15)
Is formed with a mold chamber 30a.
The socket terminals 32, 34 are arranged so that the terminal contact portions 32a, 34a protrude into the socket a.

On the other hand, of the wires 60 for supplying power to the lamp, a high-voltage wire terminal 62 is provided at an end of the high-voltage wire.
The low-piezoelectric wire terminal 64 is attached to each end of the low-piezoelectric wire. Each of the wire terminals 62 and 64 is provided with the mold chamber 30.
terminal contact portions 3 of socket terminals 32 and 34 projecting into
Fitting gaps 62a, 64a into which 2a, 34a can be fitted respectively.
Are formed.

The fitting structure between the socket connecting portion 20 and the socket 30 is as follows. As shown in FIG.
The outer circumferential surface of the socket connecting portion 20 has a radially projecting 2
One projection (projection) 27 is formed at 180 ° intervals.

On the other hand, at the rear end of the outer peripheral wall of the socket 30, four fitting grooves 37 are formed at 90 ° intervals.
Each fitting groove 37 extends in the circumferential direction from a projection entrance 37a opened to the axial end of the socket 30.
As shown in FIG. 21, the small width portion 37 b is so small that the projection 27 cannot enter. And this small width part 3
A fitting hole 37c having a shape corresponding to the outer shape of the projection 27 is formed at a position immediately before the side 7b.
The protrusion 27 can enter the inside of the fitting groove 37 in the circumferential direction up to a position where it fits into the fitting groove c.

The reason why the number of the fitting grooves 37 is larger than the number of the protrusions 27 is that the mounting angle of the socket 30 with respect to the socket connecting portion 20 can be changed at 90 ° intervals.

In the present invention, a projection may be provided on the socket 30 side, and a fitting groove into which the projection may enter may be provided on the valve 10 side.

The lamp is provided with the electric wires 60 and a braid 80 covering the electric wires 60.
The braid 80 is formed by weaving a conductive material (conductor) such as copper, and a fixing bracket (attachment portion) 50 is fixed to an end thereof.

The fixing bracket 50 is made of a conductor, similarly to the braid 80, and has a substantially C-shaped cross-section in which a part in the circumferential direction is absent in the present embodiment. A U-shaped slit 51 is formed in the peripheral wall, and a portion surrounded by the slit 51 swells outward as shown in FIG.
2 and the end of the braid 80 is clamped by sandwiching the end of the braid 80 between the sandwiching piece 52 and the peripheral wall of the fixing bracket 50, so that the fixing bracket 5 is attached to the end of the braid 80.
0 is fixed.

An axial end of the fixing bracket 50 is formed in a flange shape, and a pair of contact portions 5 protruding radially from the end.
8 are formed. The contact portion 58 is formed with a pair of protruding pieces 58a facing each other at an interval, and the spring piece 18a of the contact portion 18 of the shield cover 16 is fitted between the protruding pieces 58a to make contact. The parts 18 and 58 come into contact with each other (ie,
And the shield cover 16 are electrically connected).

A plurality of convex portions 35 extending in the axial direction are formed on the outer peripheral surface of the
A concave groove 55 that can be fitted into the convex portion 35 is formed on the inner peripheral surface of. The forming position is set so that the protruding piece 58a and the spring piece 18a can be fitted only at a relative angular position where the convex portion 35 and the concave groove 55 fit.

A braid pressing piece 30b for sandwiching the braid 80 together with the outer peripheral surface of the socket 30 is formed in a part of the socket 30 in the circumferential direction, and as shown in FIG.
It is intended to prevent the end of the braid 80 from coming off the fixing bracket 50 when 0 is pulled in a direction orthogonal to the socket axis direction.

Next, the procedure for assembling the lamp will be described.

The high voltage terminal 32, the low voltage terminal 34, and the seal member 36 are mounted in the socket 30.

As shown in FIG. 15, the high voltage electric wire terminal 62 is made to enter the mold chamber 30 a of the socket 30, and the terminal contact portion 32 a of the high voltage socket terminal 32 is inserted into the insertion gap 62 a. Similarly, the low-voltage wire terminal 64 is made to enter the mold chamber 30a, and the terminal contact portion 34a of the low-voltage socket terminal 34 is fitted into the fitting gap 64a. Thus, the socket terminals 32 and 34 and the electric wire 60 are connected.

The molten resin is poured into the mold chamber 30 a to integrate the socket 30 with the wire terminals 62 and 64. In other words, a mold body 31 having a shape corresponding to that shape is shown in the mold chamber 30a (shown by a broken line in FIG. 14).
Is molded.

As shown in FIGS. 17 to 19, the socket 30 is temporarily fitted to the socket connecting portion 20. That is,
The socket 30 and the socket coupling portion 20 are fitted in the axial direction such that the projection 27 of the socket coupling portion 20 enters the appropriate fitting groove 37 in the axial direction from the projection entrance 37a.

After the temporary fitting, the projections 27 are rotated by rotating the socket 30 relatively to the socket coupling portion 20.
Into the fitting groove 37 (as shown in FIG. 21).
7c) to the circumferential direction. This completes the fitting between the socket connecting portion 20 and the socket 30 (full fitting).

With the electric wire 60 passed through the braid 80, the fixing bracket 50 at the end of the braid 80 is connected to the socket 30.
23 (FIG. 23), and while fitting the concave groove 55 of the fixing bracket 50 and the convex portion 35 of the socket 30, the spring piece 18a is inserted between the two projecting pieces 58a as shown in FIGS. Then, the mounting of the fixture 50 to the socket 30 and the valve 10 is completed (the state of FIG. 26). In this mounting state, the contact portions 58 and 18 come into contact with each other, and the shield cover 16, the fixing bracket 50, and the braid 80 can be collectively connected to the ground. Thus, a shield device that continuously covers the socket 30 and the electric wire 60 can be constructed.

Here, if the fitting between the socket 30 and the socket connecting portion 20 is incomplete, for example, if the temporary fitting remains, the groove 55 of the fixture 50 is 27 and 28, the protruding piece 58a and the spring piece 18 are fitted together with the projection 35 of the socket 30.
Since the angle position with respect to a is shifted, the two cannot be engaged. Therefore, at this stage, it is possible to reliably detect whether or not the fitting between the socket 30 and the socket coupling portion 20 is complete.

Further, in the structure shown here, the braid 80
Since the socket 30 and the electric wire 60 are continuously covered, the number of parts is smaller than that of the conventional structure shown in FIGS. Further, since both the socket 30 and the electric wire 60 are covered by a single braid 80, if this braid 80 is connected to the ground, both the socket 30 and the electric wire 60 can be reliably shielded. Therefore, it is not necessary to provide a contact spring piece 283 or the like shown in FIG. 2 or the like for ensuring the contact between the braid fixing bracket 282 and the shield cover 250 unlike the conventional structure. In other words, a more reliable shield can be achieved with a simple structure using a single braid 80.

Further, in this structure, since the fixing member 50 attached to the socket 30 is directly in contact with the shield cover 16 of the bulb 10, the earth connection of the shield cover 16 can be reliably performed with a simple structure. It is possible.

Further, in this structure, the socket 30 and the fixing fitting 50 are formed with projections and depressions (projections 35 and concave grooves 55) which can be fitted to each other. Since the angular position of the cover 16 with the contact portion 18 is matched, the convex portion 35 and the concave groove 5 are formed.
Using the position 5 as a guide, the engagement of the two contact portions 58 and 18 can be easily performed. This effect can be similarly obtained by providing a concave portion on the outer peripheral surface of the socket 30 and providing a convex portion on the inner peripheral surface of the fixing bracket 50 to be fitted with the concave portion.

However, the present invention is also applicable to a lamp without the shield cover 16 on the bulb 10 side.
The mounting portion (fixing fitting 50 in the illustrated example) provided at the end of the braid 80 is directly connected to the valve 1 without involving the socket 30.
It may be mounted on the 0 side, or conversely, may be mounted only on the socket 30 in front of the valve 10. In any case, the same effect as described above can be obtained by arranging the mounting portion so that it cannot be mounted in a state where the socket connecting portion 20 and the socket 30 are incompletely connected.

FIGS. 29 to 3 show a second embodiment of the present invention.
6 will be described.

In the first embodiment, the socket 30
The member for shielding from the wire to the electric wire 60 is a braid 8
However, in the second embodiment, the socket shield cover 70 for socket shield only as shown in FIGS. 31 and 32 is used.
Shield cover 70 and braided fixing bracket 82
Are configured to be electrically connected to each other by contact with the contact.

As shown in FIGS. 31 and 32, the socket 30 is formed with an electric wire lead-out portion 39 protruding in one direction from its cylindrical outer peripheral wall. 30a are formed. On the other hand, the socket shield cover 70 has a shape that covers the entire socket 30, that is, a shape in which a wire lead-out portion cover 79 corresponding to the wire lead-out portion 39 extends from a cap-shaped main body that opens in one direction. . Similarly to the fixture 50, the socket shield cover 70 can be engaged with the concave groove 75 that can be fitted to the projection 35 on the socket 30 side and the spring piece 18a of the contact portion 18 in the valve shield cover 16. And a pair of contact portions 78 each having a protruding piece 78a.

The braid fixing bracket 82 is fixed to the end of the braid 80 by caulking or the like, and has two side walls.
A contact spring piece 83 is formed so as to extend outward from both sides from the side wall, and the contact spring piece 83 is designed so as to press against the inner side surface of the wire outlet cover 79 of the shield cover 70.

The procedure for assembling the lamp in this embodiment is as follows.

The procedure for assembling the socket 30 is exactly the same as that of the first embodiment. That is, the high-voltage terminal 32, the low-voltage terminal 34, and the seal member 36 are mounted in the socket 30, and the high-voltage wire terminal 62 and the low-voltage wire terminal 64 enter the mold chamber 30a of the socket 30 shown in FIG. After fitting the terminal contact portions 32a of the high voltage socket terminals 32 and the terminal contact portions 34a of the low voltage socket terminals 34 into the gaps 62a, 64a, the mold chamber 3
The socket 30 is integrated with the wire terminals 62 and 64 by pouring a molten resin into the inside of the socket 0a. That is, the mold chamber 30
In FIG. 2A, a mold body 31 having a shape corresponding to the shape (FIG.
9 (shown by broken lines).

In the same manner as in the first embodiment, the socket 30 is temporarily fitted in the socket connecting portion 20 in the axial direction, and the two are relatively rotated to be fully fitted.

As shown in FIG. 32, a braid fixing metal 82 is externally fitted to the electric wire lead-out portion 39 of the socket 30 and fixed.
Further, while fitting the concave groove 75 of the socket shield cover 70 and the convex portion 35 of the socket 30, the spring piece 18 a at the contact portion of the valve shield cover 16 is inserted between the two projecting pieces 78 a of the shield cover 70. The mounting of the socket shield cover 70 on the socket 30 and the valve 10 is completed by interruption (the state of FIGS. 33 and 34). At this time, the two contact spring pieces 83 of the fixture 82 come into contact with the inner surface of the electric wire lead-out portion cover 39 of the socket shield cover 70, so that electrical connection between them is made. In this state, it is possible to collectively connect the shield covers 16 and 70, the fixing bracket 82, and the braid 80 to the ground. Thus, a shield device that continuously covers the socket 30 and the electric wire 60 can be constructed.

Also in this embodiment, if the socket 30 and the socket connecting portion 20 are incompletely fitted with each other, for example, if they are still temporarily fitted, the socket shield cover may be used. FIG. 35 and FIG. 36 show the state in which the concave groove 75 of 70 and the convex portion 35 of the socket 30 are fitted.
As shown in (1), since the angular position of the projecting piece 58a and the spring piece 18a is shifted, they cannot be engaged. Therefore, at this stage, it is possible to reliably detect whether or not the fitting between the socket 30 and the socket coupling portion 20 is complete.

As described above, according to the present invention, the braid 80 for the electric wire shield and the shield cover 70 for the socket shield are provided.
Even if the shield cover 70 is
By devising the mounting structure of (1), it is possible to reliably detect a poor connection between the socket and the valve.

In addition, the present invention can take the following embodiments.

(1) In the above embodiment, the socket 30 and the fixing bracket 50 (or the socket shield cover 70)
As means for positioning the angular position with respect to the
The concave portion 55 or 75 is formed on the outer peripheral surface side of the convex portion 35, the fixing bracket 50 or the inner peripheral surface side of the shield cover 70;
A convex portion may be formed on the side of the shield cover 70 or on the side of the shield cover 70.

(2) In the above embodiment, the socket 30 and the valve 10 are temporarily fitted in the axial direction, and thereafter, the two are relatively rotated to be fully fitted. The present invention is also applicable to a valve in which the fitting operation is performed only in the axial direction with the valve. In this case, the mounting structure should be designed so that the socket shield member does not reach the valve at the stage where the fitting operation in the axial direction is shallow (that is, the stage where the fitting is incomplete) and cannot be mounted on the valve. Good.

[0072]

As described above, according to the present invention, only when a bulb having a light emitting portion that emits light by discharge and a socket for connecting the light emitting portion to a power source are completely connected,
Since it is configured so that the socket shield member that covers this socket can be mounted, it has a simple and low-cost structure without adding a special member or circuit.
This has the effect of reliably detecting the incompletely connected state between the valve and the socket.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an example of a conventional discharge lamp.

FIG. 2 is an exploded perspective view of the discharge lamp.

FIG. 3 is an exploded perspective view of a socket in the discharge lamp.

FIG. 4 is a cross-sectional front view showing a stage before an electric wire terminal is set in a socket of the discharge lamp.

FIG. 5 is a perspective view showing a stage after an electric wire terminal is set in a socket body of the discharge lamp and before a seal member is set.

FIG. 6 is a perspective view showing a stage after a seal member is set on a socket body of the discharge lamp and before a socket cover is attached.

FIG. 7 is a perspective view showing a stage before a braid for electric wire shielding is connected to the socket.

FIG. 8 is a perspective view showing a state where a braid for electric wire shielding is connected to the socket.

FIG. 9 is a perspective view showing a stage before the socket is connected to the bulb.

FIG. 10 is a perspective view showing a stage where the socket is temporarily fitted to a valve.

FIG. 11 is a perspective view showing a stage after the socket is fully fitted to a valve and before a socket shield cover is attached.

FIG. 12 is a perspective view showing a state in which the socket shield cover is mounted.

FIG. 13 is a sectional front view of the discharge lamp according to the first embodiment of the present invention.

FIG. 14 is an exploded perspective view of the discharge lamp according to FIG.

FIG. 15 is a cross-sectional view showing a stage where electric wire terminals are set in a mold chamber of the discharge lamp according to FIG. 13;

FIG. 16 is a sectional front view of a socket in the discharge lamp according to FIG. 13;

FIG. 17 is a perspective view showing a stage before a socket is fitted to the bulb of the discharge lamp according to FIG. 13;

FIG. 18 is a perspective view showing a stage in which a socket is temporarily fitted to the bulb of the discharge lamp according to FIG. 13;

FIG. 19 is a front view showing a positional relationship between a protrusion and a fitting groove at a temporary fitting stage shown in FIG. 18;

20 is a perspective view showing a state in which the bulb and the socket of the discharge lamp according to FIG. 13 are fully fitted.

21 is a front view showing a positional relationship between a projection and a fitting groove in the fully fitted state shown in FIG.

FIG. 22 is a sectional front view showing a connection structure between the braid of the discharge lamp according to FIG. 13 and a fixture.

FIG. 23 is a perspective view showing a state where a braided fixing bracket is approached to the socket in the fully fitted state shown in FIG. 20;

FIG. 24 is a perspective view showing a stage immediately before engaging a contact portion of the fixing bracket and a contact portion of the valve shield cover shown in FIG. 23;

FIG. 25 is a perspective view showing a state in which the engagement of the contact portions has been completed.

26 is a sectional side view showing the state of FIG. 25.

FIG. 27 is a perspective view showing a state in which the contact portion of the fixture is approached to the contact portion of the shield cover in the temporary fitting stage shown in FIG.

FIG. 28 is a sectional side view showing the state of FIG. 27;

FIG. 29 is an exploded perspective view of the discharge lamp according to the second embodiment of the present invention.

FIG. 30 is a cross-sectional view showing a stage where electric wire terminals are set in a mold chamber of the discharge lamp according to FIG. 29;

FIG. 31 is a perspective view showing a socket and a shield cover for the socket of the discharge lamp according to FIG. 29;

FIG. 32 is a perspective view showing a stage before engaging a contact portion of the socket shield cover and a contact portion of the valve shield cover according to FIG. 31;

FIG. 33 is a perspective view showing a state where engagement of the contact portions shown in FIG. 32 has been completed.

FIG. 34 is a sectional side view showing the state of FIG. 33.

FIG. 35 is a perspective view showing a state where the contact portion of the socket shield cover approaches the contact portion of the shield cover with the socket and the socket coupling portion of the valve shown in FIG.

FIG. 36 is a sectional side view showing the state of FIG. 35;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Bulb 12 Light-emitting part 16 Shield cover 18 Contact part of shield cover 20 Socket coupling part 27 Projection (projection part) 30 Socket 37 Fitting groove 35 Convex part (positioning part) 50 Braided fixing bracket (mounting part) 55 Concave groove (positioning) Part) 58 Contact part of the braid fixing bracket 60 Electric wire 70 Socket shield cover 75 Depressed groove (positioning part) 78 Contact part of the socket shield cover 80 Braid

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hiroki Hirai 1-7-10 Kikuzumi, Minami-ku, Nagoya-shi, Aichi Inside Harness Research Institute, Inc. (72) Inventor Tetsuji Tanaka 1 Kikuzumi, Minami-ku, Nagoya-shi, Aichi 7-7-10 Harness Research Institute, Inc. (72) Inventor Shigeki Sakai 1-7-10 Kikuzumi, Minami-ku, Nagoya City, Aichi Prefecture Harness Research Institute, Inc. (72) Inventor Yoshito Sakai Nagoya, Aichi Prefecture 1-7-10 Kikuzumi, Minami-ku, Harness Research Institute, Inc. (72) Inventor Ryoji Tsuji 1-7-10, Kikuzumi, Minami-ku, Nagoya, Aichi Prefecture F-term (reference) 3K013 AA01 BA02 DA06 EA03 3K042 AA08 AB01 AC02 CA01 5E024 BE01

Claims (7)

[Claims] 1. A bulb having a light emitting portion that emits light by discharging, a socket connected to the bulb to connect the light emitting portion to a power source, and a socket mounted on the socket or the bulb so as to cover the socket. And a shield member for the socket, and the socket shield member can be mounted only in a state where the bulb and the socket are completely connected. 2. The discharge lamp according to claim 1, wherein
The socket and the valve are temporarily fitted in the axial direction, and then the socket and the valve are fully fitted by relatively rotating each other. At the angular position of the temporary fitting, the socket shield is provided. A discharge type lamp, wherein the mounting structure is configured such that the mounting of the member is impossible and the mounting of the socket shield member can be performed at the angular position of the main fitting. 3. The discharge lamp according to claim 2, wherein
Providing a protrusion on one of the socket and the valve,
On the other hand, a discharge-type lamp provided with a fitting groove having such a shape that the projecting portion can enter in the circumferential direction after entering in the axial direction of the socket and the bulb. 4. The discharge lamp according to claim 2, wherein a positioning portion for determining a relative angle between the socket and the socket shield member is provided on the socket and the socket shield member, and the socket and the socket are positioned at the relative angular positions determined by the positioning portion. A discharge shield lamp, wherein the socket shield member is engaged with the bulb side in a state where the shield member exists. 5. The discharge lamp according to claim 1, wherein the bulb is provided with a bulb shield member that covers the light emitting portion in a partially exposed state, and the socket and the bulb are connected to each other. A discharge lamp characterized in that the bulb shield member and the socket shield member can be directly engaged only in a completely connected state. 6. A discharge braid according to claim 1, wherein a conductor braid covering the socket shield member over the socket and an electric wire connected thereto is provided, and an end of the conductor braid. And a mounting portion that can be mounted on the bulb or the socket only when the bulb and the socket are completely connected to each other. 7. The discharge lamp according to claim 6, wherein
The bulb is provided with a valve shield member that covers the light emitting portion in a partially exposed state, and the mounting portion is formed of a conductor, and the bulb shield member is provided only when the socket and the bulb are completely coupled. A discharge lamp characterized in that a member and the mounting portion can be directly engaged with each other.