JPH0553062A - Light source device - Google Patents

Abstract

PURPOSE:To provide a light source device without requiring to set the working accuracy of components strictly and capable of surely operating an interlock switch by absorbing dispersion on assembling without applying adjustment. CONSTITUTION:An interlock presser plate 21 as a switch depressing part is provided in the closing direction of a light source lamp exchange door 13, and the interlock switch 24 is provided oppositely to the interlock presser plate 21 of the light source lamp exchange door 13 when it is closed, and a flat spring 25 that is an elastic member to transmit the pressing force of the interlock presser plate 21 to the interlock switch 24 is interposed between the former and the latter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a light source device which is connected to a fiberscope and outputs illumination light.

[0002]

2. Description of the Related Art Conventionally, in a light source device for supplying light to a fiberscope, a light source lamp such as a xenon lamp is held by a heat sink, and power is supplied to the light source lamp through the heat sink. ing.

In the light source device having such a structure, when replacing the light source lamp, the light source lamp replacement door is opened, the light source lamp is taken out together with the heat sink, and the light source lamp is replaced. Therefore, when the light source lamp replacement door is opened, the heat sink capable of supplying power to the light source lamp is exposed. Therefore, when the light source lamp replacement door is opened, an interlock switch is provided to stop power supply to the heat sink. There is.

That is, as shown in FIG. 7, the light source device 1
When the light source lamp replacement door 2 is closed, the interlock push plate 3 fixed to the light source lamp replacement door 2 by spot welding or the like is the long hole 4 of the test pin countermeasure plate 4.
It is possible to supply power to the lamp unit 8 housed in the lamp house 7 by directly pressing the interlock switch 6 fixed to the switch mounting plate 5 by penetrating a, and the light source device 1
A light source lamp (not shown) can be turned on by acting on a lamp ignition switch (not shown).

If the light source lamp replacement door 2 is opened abruptly while the light source lamp is on, the interlock push plate 3 of the light source lamp replacement door 2 stops pressing the interlock switch 6 and leaves. The power supply to the lamp unit 8 is stopped.

[0006]

However, since the interlock push plate 3 of the light source lamp replacement door 2 pushes the interlock switch 6 with the plate thickness end surface of the interlock push plate 3, the above interlock push plate is pressed. If 3 is vertically displaced, the interlock switch 6 may not be reliably pressed. Therefore, the interlock push plate 3 is required to have strict machining precision (bending precision, end face machining and finishing, plate thickness precision, etc.) and also high attachment precision to the light source lamp replacement door 2.

Further, if the interlock push plate 3 or the switch mounting plate 5 is displaced in the front-back direction of the light source device 1 (left-right direction in the drawing), the interlock switch 6 may be excessively pressed, or On the contrary, there may be a case where the interlock switch 6 cannot be reliably pressed.

The present invention has been made in view of the above circumstances. It is not necessary to make the machining accuracy of parts particularly severe, and variations in assembly are absorbed without adjustment, so that the interlock switch operates reliably. It is an object of the present invention to provide a light source device that can be operated.

[0009]

In order to achieve the above object, a light source device according to the present invention is provided with a switch pressing portion in the closing direction of a light source lamp replacement door, and the switch pressing portion of the light source lamp replacement door is closed when it is closed. A lock switch is provided oppositely, and an elastic member for transmitting the pressing force of the switch pressing portion to the interlock switch is interposed between the switch pressing portion and the interlock switch.

[0010]

[Operation] In the above structure, when the light source lamp replacement door is closed, the pressing force of the switch pressing portion provided in the light source lamp replacement door is transmitted to the interlock switch via the elastic member, and the interlock switch is closed. The power is supplied to the light source lamp by turning on the switch.

When the light source lamp replacement door is opened,
The switch pressing portion of the light source lamp replacement door does not act on the elastic member and turns off the interlock switch to cut off the power supply to the light source lamp.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

{First Embodiment} FIGS. 1 to 4 show a first embodiment of the present invention. FIG. 1 is an explanatory view when a light source lamp replacement door is closed,
2 is a perspective view of the light source device, FIG. 3 is an explanatory perspective view when the light source lamp replacement door is opened, and FIG. 4 is an explanatory diagram when the light source lamp replacement door is opened.

In these figures, reference numeral 11 denotes a light source device, which is connected to a fiberscope (not shown) and which emits light from a xenon lamp (not shown) provided in the light source device 11 as described above. It can be supplied to fiberscopes.

The side plate 11a of the light source device 11 has a hinge 12 and a light source lamp replacement door 13 which can be freely opened and closed.
Is provided. Furthermore, this light source lamp replacement door 13
A hinge 14 is attached to an end surface of the light source lamp replacement door 13 opposite to the hinge 12 so that the light source lamp replacement door 13 can be fixed to the side plate 11a of the light source device 11.

Further, in the light source device 11, a xenon lamp is held by heat sinks 15 and 16 which can be supplied with power to form a lamp unit 17, and the lamp unit 17 is attached and detached by the detachable knobs 18 and 19. It is housed inside and out freely.

Further, on the lower portion and the rear surface side of the light source lamp replacement door 13 (on the side of the lamp unit 17), an interlock pushing plate 2 having an L-shaped cross section as a switch pushing portion.
1 is fixed by spot welding or the like. In addition, a test pin countermeasure plate 22 having an L-shaped cross section and having a long hole 22a through which the interlock push plate 21 can be inserted is attached to a lower portion of the lamp house 20 in the light source device 11. The long hole 22a of the test pin countermeasure plate 22 is I
The test pin (diameter 3 mm) defined by the EC standard is formed in a size that does not allow penetration, and meets the IEC standard.

A switch mounting plate 23 having an L-shaped cross section is provided behind the test pin countermeasure plate 22 (inside the light source device 11). The switch mounting plate 23 has an interlock switch 24 and an elastic member. Is attached to the interlock switch 24 via the leaf spring 25 so that the pressing force of the interlock pushing plate 21 can be transmitted to the interlock switch 24. Here, the center of the interlock switch 24 and the interlock push plate 21 are offset from each other, and the position of the end face of the interlock push plate 21 is the position of the interlock switch 24 via the leaf spring 25. It is set deeper than the switch position. Further, the shape, spring constant, etc. of the leaf spring 25 are set so as to appropriately absorb the pressing force of the interlock pushing plate 21 and not apply an excessive force to the interlock switch 24.

Further, the interlock switch 24 is provided.
Is connected to a lamp ignition switch (not shown) for turning on a light source lamp (not shown) inside the light source device 11.

Next, the operation of the embodiment having the above construction will be described.

First, the light source lamp replacement door 1 of the light source device 11
In the state where 3 is closed, this light source lamp replacement door 1
The interlock push plate 21 of 3 is the test pin countermeasure plate 2
The plate spring 25 attached to the switch mounting plate 23 is pressed through the two elongated holes 22a to deform the plate spring 25, and the interlock switch 24 is turned on.

For this reason, power can be supplied to the lamp unit 17 housed in the lamp house 20, and a lamp ignition switch (not shown) inside the light source device 11 is acted on so that a light source lamp (not shown) can be turned on. Is becoming

The light source lamp replacement door 1 of the light source device 11
In the state where 3 is opened, the interlock push plate 21 of the light source lamp replacement door 13 is removed from the long hole 22a of the test pin countermeasure plate 22 and separated from the leaf spring 25, and the leaf spring 25 is Interlock switch 24
Since the pressing is stopped and the lamp is turned off, the power cannot be supplied to the lamp unit 17, and the heat sinks 15 and 16 are not charged.

Thus, by interposing the leaf spring 25, which is an elastic member, between the interlock push plate 21 and the interlock switch 24, it is possible to increase the overstroke of the switch operation. Due to the deformation of the leaf spring 25, the interlock switch 2
Since it is possible to prevent an excessive force from being applied to 4, it is not necessary to make the processing accuracy of the parts particularly severe, and variations in assembly can be absorbed without adjusting.

Further, since the interlock push plate 21 acts on the interlock switch 24 via the plate spring 25, the interlock switch plate 21 and the plate spring 25 increase in contact area with each other, and the interlock switch plate 21 increases. Two
The operation of No. 4 is reliable, and the allowable range of variation in assembly can be increased.

[Second Embodiment] FIG. 5 is an explanatory view when the light source lamp replacement door is closed according to the second embodiment of the present invention.

This second embodiment is also constructed in substantially the same manner as the first embodiment, but the interlock pushing plate as a switch pushing portion is integrally formed on the light source lamp replacement door. Is different from.

The description of the same components as those of the first embodiment will be omitted.

In FIG. 5, reference numeral 30 is a light source lamp replacement door, and the lower portion of the light source lamp replacement door 30 is bent toward the rear surface side (lamp unit side), and the switch pressing portion 3 is provided.
0a is formed.

Then, when the light source lamp replacement door 30 is closed, the switch pressing portion 30a of the light source lamp replacement door is inserted into the elongated hole 31a of the test pin countermeasure plate 31 and attached to the switch mounting plate 32. The leaf spring 33 is pressed to deform the leaf spring 33, and the interlock switch 34 is turned on.

Further, when the light source lamp replacement door 30 is opened, the switch pressing portion 30a of the light source lamp replacement door 30 is removed from the elongated hole 31a of the test pin countermeasure plate 31 and separated from the leaf spring 33. This leaf spring 33
Stops pressing the interlock switch 34 and turns off
State.

The other structure and operation are the same as those of the first embodiment, and the description thereof will be omitted.

As described above, since the switch pressing portion is formed integrally with the light source lamp replacement door, the number of parts can be reduced.

{Third Embodiment} FIG. 6 is an explanatory view of an elastic member structure according to a third embodiment of the present invention.

The third embodiment is also constructed in substantially the same manner as the first embodiment, but differs from the first embodiment in that the elastic member is not a leaf spring but an assembly part using a coil spring.

The description of the same components as those of the first embodiment will be omitted.

In FIG. 6, reference numeral 40 is an interlock switch, and this interlock switch 40 is attached to a switch having an L-shaped section which is arranged in the lower part of the lamp house in the light source device as in the first embodiment. It is attached to the plate 41.

Further, shafts 42a and 42b are fixed to the switch mounting plate 41 by means such as caulking, and a push plate receiving plate 43 and a switch pressing plate 44 are slidable along the shafts 42a and 42b. The coil springs 45a and 45b are interposed and held between.
Incidentally, the interlock push plate 47 of the push plate receiving plate 43.
The sides are stopped by E-rings provided at the tips of the shafts 42a and 42b.

In the state where the light source lamp replacement door is closed, the tip surface of the interlock push plate 47 of the light source lamp replacement door presses the push plate receiving plate 43 and switches the coil springs 45a and 45b. The pressing plate 44 is pressed to turn on the interlock switch 40.

The other structure and operation are the same as those of the first embodiment, and the description thereof will be omitted.

As described above, the elastic member is not the leaf spring but the
By using an assembly part that uses a coil spring,
The elastic member can be designed more easily.

By the way, as shown in FIG. 8 and FIG.
In the conventional light source device 50, the lamp house shield case 51 is provided inside the light source device 50 and the chassis 5 of the light source device 50.
0a. Further, the light source lamp replacement door 52 side of the lamp house shield case 51 is opened for light source lamp replacement, and therefore, the back side of the light source lamp replacement door 52 (the lamp house shield case 51
On the side), a shield member 53 capable of closing the lamp house shield case 51 when the light source lamp replacement door 52 is closed is attached via a coil spring 54.

Since the conventional light source device 50 having such a structure requires parts such as the shield member 53 and the coil spring 54, the number of parts is large and a space for these parts must be secured. Further, there is a problem in that the electrical conductivity between the shield member 53 and the chassis 50a of the light source device 50 is weak and a sufficient shielding effect cannot be obtained.

Therefore, as shown in FIG. 10, the lower end of the lamp house shield case 61 inside the light source device 60 is
The light source device 6 is arranged so that the lamp house shield case 61 and the light source lamp replacement door 62 when closed have a slight gap.
It is fixed to the 0 chassis 60a. Further, a conduction finger 63 is provided at an end portion of the lamp house shield case 61 on the light source lamp replacement door 62 side, and the light source lamp replacement door 62 is provided.
With the closed state, the end of the conducting finger 63 can be contacted, and the light source lamp replacement door 62 can be conducted with the lamp house shield case 61 via the conducting finger 63.

Alternatively, as shown in FIG. 11, an elastic conductive member 64 such as a conductive rubber or a conductive sponge is provided in place of the conductive finger 63, and the light source lamp replacement door 62 is provided with the elastic housed member 64 and the lamp house shield case. 61 can be electrically connected.

Alternatively, as shown in FIG. 12, the opening of the lamp house shield case 65 inside the light source device 60 is extended to the outside and the lamp house shield case 65 is extended.
The light source lamp replacement door 66 is directly attached to the structure.

With the above structure, the light source lamp replacement door can be part of the lamp house shield case, so that the number of parts can be reduced and sufficient conduction can be obtained. It is possible to obtain a good shield effect.

Next, the output connector section of the image pickup device for an endoscope used together with the light source device will be described.

FIG. 13 is a sectional view of the output connector section of the endoscope image pickup device, and reference numeral 71 is a main metal output connector for transmitting an image pickup signal of the endoscope image pickup device.
This is provided so as to be exposed to the outside from the metal front panel 72. The inner periphery of the output connector portion is fitted to the outer periphery of the output connector 71 without any gap, and the outer periphery is somewhat smaller than the connector hole of the front panel 72 and is exposed to the exterior of the device. A metal ring 73 having a hole concealing flange formed therein, and a metal ring 74 sandwiching the front panel 72 with the flange of the metal ring 73 and screwed and fixed to the metal ring 73 are provided.

In this structure, there is no space between the front panel 72 and the metal rings 73 and 74 because the metal rings 73 and 74 sandwich the front panel 72, and there is no gap between the output connector 71 and the metal. The ring 73 is also fitted and there is no gap. In addition, even if the position of the output connector 71 is slightly displaced due to dimensional intersection,
There is a gap between the outer periphery of the metal ring 73 and the hole of the front panel 72, and since the metal ring 73 can move together with the output connector 71, there is no gap in the appearance.

Therefore, since the output connector 71, the metal rings 73 and 74, and the front panel 72 are all in contact with each other, electrical shielding can be easily performed, and since there is no gap in the external portion of the device, an effective dustproof structure is provided. be able to. Further, since the dimensional accuracy of the position of the output connector 71 is not required so much, the output connector 71 to which a force is applied can be fixed to a distant portion such as a strong chassis 75. Further, the elimination of the gap makes it possible to improve the design.

On the other hand, although the structure is almost the same as that described above, a cutout is provided in a part of the inner circumference of the metal ring 73, and the cutout portion is provided with a shield finger 76 which comes into contact with the outer circumference of the output connector 71. To provide. Further, a part of the metal ring 74 is also provided with a notch, and a shield finger 77 that comes into contact with the front panel 72 is provided in this notch.

With such a structure, the output connector 71 and the metal ring 73 are positively connected by the shield finger 76, and the front panel 72 and the metal ring 74 are positively connected by the shield finger 77. A reliable shield effect can be obtained.

[0054]

As described above, according to the present invention, the switch pressing portion is provided in the closing direction of the light source lamp replacement door, and the interlock switch is provided opposite to the switch pressing portion of the light source lamp replacement door when closed. , Between the switch pressing portion and the interlock switch, since the elastic member for transmitting the pressing force of the switch pressing portion to the interlock switch is interposed, there is no need to particularly tighten the processing accuracy of the parts, Further, it is possible to absorb the assembly variation without adjusting and operate the interlock switch reliably.

[Brief description of drawings]

FIG. 1 is an explanatory view when a light source lamp replacement door is closed according to a first embodiment of the present invention.

FIG. 2 is a perspective view of a light source device according to a first embodiment of the present invention.

FIG. 3 is an explanatory perspective view when the light source lamp replacement door is opened according to the first embodiment of the present invention.

FIG. 4 is an explanatory diagram when a light source lamp replacement door is opened according to the first embodiment of the present invention.

FIG. 5 is an explanatory diagram when the light source lamp replacement door is closed according to the second embodiment of the present invention.

FIG. 6 is an explanatory view of an elastic member structure according to a third embodiment of the present invention.

FIG. 7 is an explanatory view when the light source lamp replacement door is closed according to the related art.

FIG. 8 is an explanatory view of a shield member of a conventional light source device.

FIG. 9 is an explanatory view of the action of a shield member of a conventional light source device.

FIG. 10 is an explanatory diagram in which the shield of the light source device is improved with conductive fingers.

FIG. 11 is an explanatory diagram in which the shield of the light source device is improved by an elastic conductive member.

FIG. 12 is an explanatory view improved by a light source lamp replacement door in which a shield of the light source device is integrated.

FIG. 13 is a cross-sectional view of an output connector portion of the endoscope imaging device.

FIG. 14 is an explanatory view of an output connector section according to another embodiment different from FIG.

[Explanation of symbols]

 13 Light source lamp replacement door 21 Switch pressing part (interlock pressing plate) 24 Interlock switch 25 Elastic member (leaf spring)

Claims (1)

[Claims] 1. A switch pressing part is provided in the closing direction of the light source lamp replacement door, and an interlock switch is provided opposite to the switch pressing part of the light source lamp replacement door when the door is closed, and the switch pressing part and the interlock switch are connected. A light source device characterized in that an elastic member for transmitting the pressing force of the switch pressing portion to the interlock switch is interposed between the two.