JP2001078958A - Imaging device for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive endoscopic imaging device enabling the controllability of an endoscope to be enhanced as the result of miniaturization of an entire camera head part. SOLUTION: A fixing member for fixing a ferrite core 51 to be assembled into a ferrite core mounting groove 49 inside a camera head part 13 is constructed of an O-ring 52 made from elastic material, and a fixing means 53 is provided which abuttingly sandwiches the O-ring 52 of elastic material in place between a switch fixing stand 34 placed inside the camera head part 13 and the ferrite core 51.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope imaging apparatus which is attached to an eyepiece of an optical endoscope and enables observation of an endoscope image on a monitor.

[0002]

2. Description of the Related Art Generally, an optical endoscope (fiberscope) is provided with an endoscope image incident on an observation optical system at the distal end of an insertion portion inserted into a lumen through an image guide fiber. There is an endoscope (flexible endoscope) that transmits to the side, and an endoscope (rigid endoscope) that transmits the endoscope image to the hand side via a relay lens without using an image guide fiber. In any endoscope, an endoscope image can be observed with an eyepiece provided on the hand side.

As means for observing an endoscope image of an optical endoscope, in addition to means for directly observing the endoscope with the naked eye from an eyepiece, an endoscope imaging device is attached to the eyepiece. There is a means for converting an endoscope image displayed on the eyepiece to an electric signal by the endoscope imaging device, outputting the signal to an external monitor, and observing the image displayed on the monitor.

[0004] This endoscope imaging apparatus includes, for example, Japanese Patent Application Laid-Open
-100102, JP-A-10-290781, and the like, a camera head portion detachably connected to an eyepiece of an endoscope, and a camera connector portion for connection to an external device. Is provided. FIG. 12 shows a camera head section a of the endoscope imaging apparatus. The camera head section a incorporates an imaging optical system including an imaging element b for converting an observation image of the endoscope into an electric signal and other electric components. Then, an electric component incorporated in the camera head section a and the camera connector section are connected via an electric cable c.

Further, a camera head section a of the endoscope image pickup apparatus
Conventionally, a cylindrical ferrite core d is provided around an electric cable c as a noise absorber. Conventionally, when the ferrite core d is mounted in the camera head a, a screw hole f for fixing the ferrite core is provided in a housing e of the camera head a, and a ring-shaped fixing nut g screwed into the screw hole f. By ferrite core d
Is fixed to the housing e of the camera head part a.

[0006]

In the above-mentioned conventional structure, it is necessary to extend the housing e of the camera head portion a in the axial direction of the electric cable c by the thickness of the fixing nut g. Therefore, the camera head part a becomes large,
There is a problem that the operability of the endoscope is deteriorated.

Further, at the time of manufacturing the camera head part a, a screw hole f for fixing a ferrite core is formed on the inner peripheral surface of the housing e.
Requires cutting. In this case, since the processing accuracy of the housing e needs to be relatively high, the processing cost of the housing e of the camera head part a is correspondingly increased, and there is a problem that the product cost is increased.

The present invention has been made in view of the above circumstances, and has as its object to provide an inexpensive endoscope imaging apparatus capable of improving the operability of an endoscope by reducing the size of the entire camera head. Is to do.

[0009]

According to a first aspect of the present invention, there is provided an imaging optical system including an imaging device detachably connected to an eyepiece of an endoscope and converting an observation image of the endoscope into an electric signal. And a camera connector portion for connecting with an external device, and a camera connector portion for connecting with an external device, and an electric cable is provided between the electric component built in the camera head portion and the camera connector portion. In the endoscope imaging apparatus connected through the camera head, a fixing member for fixing an assembly component to be mounted on a component receiving portion inside the camera head portion is made of an elastic material, and is disposed inside the camera head portion. An endoscope imaging apparatus, further comprising fixing means for applying and fixing the fixing member so as to be sandwiched between a rigid member to be provided and the assembly component. According to the first aspect of the present invention, at the time of assembling the assembling component into the component receiving portion inside the camera head portion, the fixing member made of an elastic material is attached to the camera while the assembling component is set in the component receiving portion. This is configured to be applied and fixed so as to be sandwiched between a rigid member disposed inside the head portion and an assembly component.

According to a second aspect of the present invention, the assembly component is a ferrite core or an inductor, which is disposed around the electric cable and is a substantially cylindrical noise absorber. An endoscope imaging apparatus according to item 1. According to the second aspect of the present invention, when the ferrite core or the inductor is mounted on the component receiving portion inside the camera head, the ferrite core or the inductor is set on the component receiving portion, and the fixing member made of an elastic material is used. Is fixed so as to be sandwiched between a rigid member disposed inside the camera head and a ferrite core or an inductor.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 shows a schematic configuration of the entire system of the endoscope apparatus 1. The endoscope apparatus 1 includes a rigid endoscope (endoscope) 2, an endoscope imaging apparatus (video converter) 3 of the present embodiment, and a video processor (camera control unit (CC)
U)) 4, a monitor 5, and a video printer 6. Here, the monitor 5 and the video printer 6 are connected to the output terminals of the video processor 4 respectively.

The rigid endoscope 2 is connected to a grip 8 on the proximal side of the base end of the elongated insertion portion 7. This gripper 8
Is connected to one end of a light guide cable 9. The other end of the light guide cable 9 is connected to a scope connector 10. This scope connector 10 is detachably connected to the video processor 4. The illumination light generated by the light source lamp in the video processor 4 is guided to the rigid mirror 2 through the light guide cable 9 and then inserted through a light guide such as an optical fiber disposed inside the rigid mirror 2. It is guided to the distal end side of the part 7 and is irradiated into the body cavity.

An eyepiece 11 is provided at the distal end of the grip 8 of the rigid endoscope 2. The endoscope imaging device 3 of the present embodiment is connected to the eyepiece 11 via an eyepiece adapter 12.

Further, the endoscope imaging device 3 of the present embodiment has a camera head 13 shown in FIG. 2, a camera connector 14 shown in FIG. 3 for connection to an external device, and a camera head 13 at one end. 13, and a universal cord 15 whose other end is connected to the camera connector section 14, respectively. Here, the camera head unit 13 is detachably connected to the eyepiece unit 11 of the rigid endoscope 2 via the eyepiece adapter 12. Further, the camera connector section 14 is detachably connected to the video processor 4.

FIG. 2 shows the internal structure of the camera head unit 13 of the endoscope imaging apparatus 1 according to the present embodiment. The camera head 13 is provided with an imaging unit 16 shown in FIG. 4 and a cable unit 17 shown in FIG. 5 which is detachably connected to the imaging unit 16.

Here, the imaging unit 16 is provided with a substantially cylindrical first head cover 18 as shown in FIG. A screw mount 19 is attached to the tip of the first head cover 18. An O-ring 20 is provided at the junction between the distal end of the first head cover 18 and the screw mount 19, and is sealed in a watertight manner.

On the outer peripheral surface of the screw mount 19, a male screw 21 for connection to the eyepiece adapter 12 is formed. Further, a mounting hole 23 for the imaging optical system 22 is formed in the axis of the screw mount 19. A filter lens 24 is fixed to the mounting hole 23 on the distal end side.

A recess 25 for mounting an image sensor is formed on the rear end surface of the screw mount 19. A solid-state imaging device (CCD) 26 that converts an observation image of the rigid endoscope 2 into an electric signal is attached to the concave portion 25. Then, the observation image of the rigid endoscope 2 incident on the filter lens 24 from the side of the rigid endoscope 2 through the eyepiece adapter 12 is formed on the solid-state imaging device 26 and converted into an electric signal.

The solid-state image sensor 26 is fixed on a peripheral circuit board 27 built in the camera head unit 13. Further, a signal cable (electric cable) 28 disposed in the universal cord 15 is connected to the solid-state imaging device 26.
Are connected at one end.

A metal shield frame 29 is provided inside the first head cover 18. The shield frame 29 has a large-diameter portion 29a for accommodating the solid-state imaging device 26 and its peripheral components at the distal end, and a cylindrical elongated cable accommodating portion 29b for accommodating the signal cable 28 at a rear end. Here, the large diameter portion 2 of the shield frame 29
The front end of 9 a is screwed and fixed to the rear end of the screw mount 19 by a fixing screw 30.

Further, a screw hole 31 extending in a direction orthogonal to the axial direction of the signal cable 28 is formed in a portion of the cable housing portion 29b of the shield frame 29 near the connecting portion with the large diameter portion 29a. . In this screw hole 31, a fixing screw 3 for fixing a cable fixing member 32 attached to the distal end of the signal cable 28 inserted in the cable housing 29 b.
3 is screwed. The head 33a of the fixing screw 33 is set to a length protruding from the outer peripheral surface of the cable housing portion 29b of the shield frame 29.

The cable housing 2 of the shield frame 29
A switch fixing base (rigid member) 34 made of plastic is disposed on the outer peripheral surface of 9b. This switch fixing base 3
A substantially flange-shaped mounting portion 35 facing the rear end surface of the large-diameter portion 29a of the shield frame 29 is formed at one end of the shield frame 29. Here, a step 29c is formed at the rear end of the large diameter portion 29a of the shield frame 29. A male screw portion 36 for mounting the switch fixing base 34 is formed in the step portion 29c. The mounting portion 35 of the switch fixing base 34 is fixed to the large-diameter portion 29 of the shield frame 29 by a substantially ring-shaped fixing base mounting nut 37 screwed onto the male screw portion 36.
a is fixed to the rear end.

The switch mounting base 34 is provided with a switch mounting surface 34a in which a part of the outer peripheral surface of the cylindrical body is cut out in a substantially flat shape as shown in FIG. 6B. The switch 38 is mounted on the switch mounting surface 34a. Here, an engagement concave portion 34b is formed at the distal end of the switch mounting surface 34a so that the protrusion of the head 33a of the fixing screw 33 is engaged. The head 3 of the fixing screw 33 is inserted into the engagement recess 34b of the switch fixing base 34.
By inserting and engaging the protrusion 3a, the position of the switch fixing base 34 in the rotational direction is determined. Thus, in the present embodiment, the switch mounting surface 34a of the switch fixing base 34 is
6 is set so as to be aligned with the upper side.

Further, a second cutout surface 34c (see FIG. 6B) which is bent at 90 ° with respect to the switch mounting surface 34a is formed on the outer peripheral surface of the switch fixing base 34. A switch cable insertion groove 39 is formed in the second cutout surface 34c. Here, a substantially oval long hole portion 40 is formed in the cable housing portion 29b of the shield frame 29 at a position corresponding to the switch cable insertion groove 39 of the switch fixing base 34. And the switch 38
The switch cable (electric cable) 41 having one end connected to the switch frame is inserted into the cable housing portion 29b of the shield frame 29 through the switch cable insertion groove 39 of the switch fixing base 34 and the elongated hole 40 of the shield frame 29. .

An operation button 42 of the switch 38 is provided on the outer peripheral surface of the first head cover 18 at a position corresponding to the switch 38. The operation button 42 is provided with a key top 43, a key top fixing member 44, and a key top fixing member fixing nut 45. Here, the key top fixing member 44 is fitted in the operation button mounting hole 18 a formed on the outer peripheral surface of the first head cover 18. A fixing nut 45 is screwed to the inner end of the key top fixing member 44 from the inner peripheral surface side of the first head cover 18.

Further, the key top 43 of the operation button 42
Is the operation button mounting hole 18a by the key top fixing member 44.
Are supported so as to be movable in the axial direction. The switch 38 is turned on / off in accordance with the pressing operation of the key top 43. The operation button 42 is positioned and arranged so as to match the upper side of the solid-state imaging device 26.
The configuration also serves as an index in the P direction.

The front end of the second head cover 46 having a substantially cylindrical shape is connected to the rear end of the first head cover 18. An O-ring 47 is inserted between the rear end of the first head cover 18 and the front end of the second head cover 46, and is sealed in a watertight manner.

Further, a substantially ring-shaped projecting portion 48 is projected from the inner peripheral surface of the second head cover 46. Here, the projecting portion 4 is provided on the inner peripheral surface of the second head cover 46.
A substantially ring-shaped ferrite core mounting groove (component receiving portion) 49 is formed by a portion on the front side of the cable 8, and a cable unit connecting concave portion 50 is formed by a portion on the rear side of the projecting portion 48. In the ferrite core mounting groove 49 of the second head cover 46, a ferrite core (assembly component) 51 which is a substantially cylindrical noise absorber and is mounted.

In a state where the front end of the second head cover 46 is connected to the rear end of the first head cover 18 to the correct mounting position, the rear end of the switch fixing base 34 and the ferrite core 51 are connected. Is set so that an appropriate gap s is formed. Further, the outer peripheral surface of the cable housing portion 29b of the shield frame 29 is made of O
A ring (fixing member) 52 is mounted. The O-ring 52 is set in a state where the O-ring 52 is in contact with the rear end of the switch fixing base 34. Then, the first head cover 18
The O-ring 52 presses against the ferrite core 51 with the front end of the second head cover 46 connected to the correct mounting position to the rear end of the switch fixing base 34 and the rear end of the switch fixing base 34 and the ferrite core 51. A fixing means 53 for fixing the O-ring 52 so as to sandwich the O-ring 52 therebetween is formed.

When the gap s between the rear end of the switch fixing base 34 and the ferrite core 51 is large, a plurality of O-rings 52 are mounted on the outer peripheral surface of the cable housing portion 29b of the shield frame 29. Alternatively, the gap s between the rear end of the switch fixing base 34 and the ferrite core 51 may be absorbed.

The cable housing 2 of the shield frame 29
A male screw portion 54 for connection to the cable unit 17 is formed at the tip of 9b. The male screw portion 54 protrudes inside the cable unit connection concave portion 50.

As shown in FIG. 5, the cable unit 17 is provided with a protective buckling portion 55 provided around the connecting portion between the distal end portion of the universal cord 15 and the camera head portion 13. .

An insertion hole 55a for the universal cord 15 is formed in the shaft center of the bend preventing portion 55. Further, a recessed mounting hole 55b is formed at the tip of the fold-preventing portion 55. A substantially ring-shaped break prevention insert member 56 is fixed to the mounting hole 55b. A universal cord base 57 fixed to the distal end of the universal cord 15 is attached inside the buckling insert member 56. An O-ring 58 is provided at a joint between the inner peripheral surface of the break preventing insert member 56 and the outer peripheral surface of the universal cord base 57,
Sealed watertight.

Further, an assembling nut 59 is provided at the most distal end of the cable unit 17. The mounting nut 59 is attached to the universal cord base 57 by a fixing screw 6.
0 is fixed by screwing.

An engaging portion 61 is formed at the tip of the assembling nut 59 and the tip of the break preventing insert member 56 so as to be removably engaged with the cable unit connecting recess 50 of the imaging unit 16. . Further, a screw hole 62 that is screwed with the male screw portion 54 of the imaging unit 16 is formed on the inner peripheral surface of the distal end portion of the mounting nut 59. In addition,
An O-ring 63 is mounted on the outer peripheral surface of the distal end portion of the buckling insert member 56.

When assembling the cable unit 17 and the imaging unit 16, the signal cable 28 and the switch cable 4 of the imaging unit 16 are connected as shown in FIG.
1 is inserted into the universal cord 15 of the cable unit 17, and the engaging portion 61 of the cable unit 17 is
0, the screw hole 62 of the mounting nut 59 is engaged.
The male screw portion 54 of the imaging unit 16 is screwed into the camera unit 16. At this time, the engaging portion 61 of the cable unit 17 and the cable unit connecting recess 5 of the imaging unit 16
The O-ring 63 is interposed at the joint with the O, and is sealed in a watertight manner.

As shown in FIG. 3, a connector case 66 formed by a resin-covered connector cover 64 and a fixing plate 65 for closing the opening of the distal end of the connector cover 64 is provided in the camera connector section 14. Have been. Here, a fixing plate engaging concave portion 64a is formed in a peripheral portion of the distal end opening of the connector cover 64. Further, an insert metal 67 is embedded in the inner bottom of the fixed plate engaging recess 64a. The fixing plate 65 is fitted into the fixing plate engaging recess 64a via a sealing material 68. The fixing plate 65 is made of an insert metal 67.
The connector cover 6 is fixed by a fixing screw 69 screwed to the connector cover 6.
4 is fixed.

The base end of a cylindrical connector connecting portion 70 is fixed to the fixing plate 65. A substantially disk-shaped first insulator 7 is provided inside the connector connection portion 70.
The first and second insulators 72, a substantially cylindrical stopper 73 and a connector guide 74 are provided. Further, the first insulator 71 and the second insulator 72 have a plurality of contact pins 7.
5 are protrudingly provided. Here, the other end of each cable such as the signal cable 28 and the switch cable 41 disposed in the universal cord 15 is connected to each contact pin 75. An O-ring 76 is provided at the joint between the fixing plate 65 and the base end of the connector connection part 70,
Sealed watertight.

A shield cylinder 78 is provided inside the connector case 66. This shield cylinder 7
8 has a large diameter portion 78a at one end and a small diameter portion 7 at the other end.
8b are respectively formed. The distal end of the large-diameter portion 78 a of the shield cylinder 78 is externally fitted and fixed to the rear end of the connector guide 74.

Further, a shield disk 79 is screwed and fixed to the open end of the small diameter portion 78b of the shield cylinder 78. An extra length of the signal cable 28 is wound around the outer peripheral surface of the shield cylinder 78. Here, since a step is provided between the large diameter portion 78a and the small diameter portion 78b in the shield cylinder 78, the signal cable 28
Can be wound many times. Therefore, the number of repairs is increased as compared with the related art because of the larger number of windings. A protective tape 80 is attached to the outer peripheral surface of the signal cable 28 wound around the shield cylinder 78.

Further, a shield member 81 made of a thin plate of a metal material is provided outside the winding body of the signal cable 28 wound around the shielding cylinder 78. The distal end of the shield member 81 is fixed to the fixing plate 6 of the connector cover 64.
5 and is screwed to a connecting member 82 connected to the connector connecting portion 70. Further, a plate spring-shaped base press contact portion 81a is formed at the base end portion of the shield member 81, and the plate spring-shaped base press contact portion 81a is provided at the time of assembly.
a is pressed against the universal cord fixing member 83.

A universal cord fixing member 83 is fixed to the base end of the connector cover 64 by a fixing nut 84 of the universal cord fixing member 83. Here, the universal cord fixing member 83 is formed with an extension 85 extending rearward of the connector cover 64. A male screw portion 85a is formed on the outer peripheral surface of the extension portion 85. A fixing nut 84 is screwed to the male screw portion 85a of the extension portion 85.

Further, the universal cord fixing member 83
A universal cord base 86 fixed to the end of the universal cord 15 is screwed and fixed inside. Here, O-rings 87 are interposed at the joint between the base end of the connector cover 64 and the universal cord fixing member 83 and at the joint between the universal cord base 86 and the universal cord fixing member 83, respectively, to provide a watertight seal. Have been.

Further, around the connecting portion between the camera connector portion 14 and the universal cord 15, a protective buckling portion 88 is provided. A substantially cylindrical insert member 89 is fixed to the tip of the buckling portion 88.
A screw hole 89 a is formed in the inner peripheral surface of the insert member 89. The male screw portion 85a of the universal cord fixing member 83 is screwed into the screw hole 89a of the insert member 89.

Next, the operation of the above configuration will be described.
At the time of assembling the camera head unit 13 in the endoscope imaging apparatus 3 of the present embodiment, the operation of assembling the ferrite core 51 inside the camera head unit 13 is performed as follows. First, the second head cover 4 of the camera head unit 13
The ferrite core 51 is inserted into the ferrite core mounting groove 49 of No. 6 and set. In this state, the front end of the second head cover 46 is connected to the rear end of the first head cover 18 to a correct mounting position. At this time, the O-ring 52
Is pressed against the ferrite core 51, and is applied so as to sandwich the O-ring 52 between the rear end of the switch fixing base 34 and the ferrite core 51.

Subsequently, the assembling work of the cable unit 17 and the imaging unit 16 is performed. During this assembling operation, the signal cable 28 and the switch cable 41 of the imaging unit 16 are inserted into the universal cord 15 of the cable unit 17 as shown in FIG. Further, with the engaging portion 61 of the cable unit 17 being engaged with the cable unit connecting concave portion 50 of the imaging unit 16, the imaging unit 16 is screwed into the screw hole 62 of the mounting nut 59.
Male screw portion 54 is screwed. Thereby, the O-ring 5
2 is pressed against the ferrite core 51 and the switch fixing base 34 is pressed.
The O-ring 52 is fixed between the rear end portion and the ferrite core 51 so as to sandwich the O-ring 52 therebetween.

Therefore, the above configuration has the following effects. That is, in the present embodiment, a fixing member for fixing the ferrite core 51 attached to the ferrite core mounting groove 49 inside the camera head section 13 is constituted by an O-ring 52 made of an elastic material, and is disposed inside the camera head section 13. Switch fixing stand 34 and ferrite core 5
A fixing means 53 is provided for fixing the O-ring 52 made of an elastic material so as to sandwich the O-ring 52 therebetween. Therefore, unlike the related art, there is no need to apply an adhesive or perform thread cutting when manufacturing the camera head portion 13, and the camera head portion 13 can be assembled with inexpensive components having a simple structure.

Further, since the fixing member for fixing the ferrite core 51 is constituted by an inexpensive O-ring 52 having a simple structure, the space required for fixing the ferrite core 51 can be minimized. Further, since the entire camera head unit 13 can be reduced in size, the operability of the rigid endoscope 2 is also improved.

Further, in the present embodiment, the first head cover 18 and the second head cover 4
6 is releasably connected, so that the work of attaching the switch 38 can be facilitated.

Further, a second cutout surface 34c bent at 90 ° to the switch mounting surface 34a is formed on the outer peripheral surface of the switch fixing base 34, and the switch cable insertion groove 39 is formed in the second cutout surface 34c. Switch 3
8 can be further facilitated.

Further, a substantially oval long hole 40 is formed in the cable accommodating portion 29b of the shield frame 29 at a position corresponding to the switch cable insertion groove 39 of the switch fixing base 34. A plurality of switch cables 41 can be inserted.

An engaging recess 34b for engaging the protrusion of the head 33a of the fixing screw 33 is formed at the tip of the switch mounting surface 34a. The position of the switch fixing base 34 in the rotational direction is determined by inserting and engaging the protrusion of the head 33a, so that the number of parts can be reduced and the cost can be reduced.

FIGS. 6A and 6B show the second embodiment of the present invention.
1 shows an embodiment of the present invention. In the present embodiment, the configuration of the fixing means 53 of the ferrite core 51 in the endoscope imaging device 3 of the first embodiment (see FIGS. 1 to 5) is changed as follows.

That is, in this embodiment, instead of the O-ring 52 of the first embodiment, two substantially circular elastic fixing elastics are provided at the rear end of the switch fixing base 34 as shown in FIG. A member 91 is provided.

Therefore, in the present embodiment, the two fixing elastic members 91 are held between the switch fixing base 34 and the ferrite core 51 disposed inside the camera head 13 so as to be sandwiched therebetween. Therefore, as in the first embodiment, there is no need to apply an adhesive or threading when manufacturing the camera head unit 13 as in the related art, and assemble the camera head unit 13 with inexpensive parts having a simple structure. It can be performed.

Further, in the present embodiment, the fixing elastic member 91 which is a rubber sheet which is smaller than the structure of the O-ring 52 of the first embodiment is employed. There is an effect that reduction can be achieved.

FIGS. 7 to 11 show a third embodiment of the present invention. FIG. 7 shows a schematic configuration of the entire system of the endoscope apparatus 100. The endoscope apparatus 100 includes an endoscope 101, an endoscope imaging apparatus 102 of the present embodiment, a camera control unit (CCU) 103 with a built-in light source, and a monitor 104.

The endoscope 101 has an insertion portion 105,
It mainly includes a hand-held grip portion 106 connected to a base end portion of the insertion portion 105, an eyepiece portion 107 provided at a terminal portion of the grip portion 106, and a light guide cable 108. . The illumination light generated by the light source lamp in the CCU 103 is guided to the distal end of the insertion section 105 through the light guide cable 108, and is radiated into the body cavity. Further, the endoscope image is guided to the eyepiece 107 by a lens or an optical fiber provided in the insertion portion 105, and then is electrically connected to the eyepiece 107 by the imaging unit 109 in the endoscope imaging device 102 which is detachable from the eyepiece 107. The signal is converted to a signal,
4 on the screen.

The endoscope imaging device 102 has a camera head unit 109, a camera connector unit 110 for connection to an external device, one end connected to the camera head unit 109, and the other end connected to the camera connector unit 110. Universal cord 111 is provided. Further, the camera head unit 109 is provided with an imaging unit 112 shown in FIG.

The image pickup unit 112 has the objective lens system 1
13, a housing 114, a solid-state imaging device 115,
Flare mask 116 and glass epoxy substrate 117
, An electronic component 118, a cable 119, a cable fixing member 120, and a shield member 121. In this case, the whole of the objective lens system 113 or the rear lens of the objective lens system 113 is bonded and fixed to the distal end side of the housing 114.

A flare mask 116 is positioned and adhered to the front surface of the solid-state imaging device 115. Further, on the rear surface of the solid-state imaging device 115,
The glass epoxy board 117 on which the circuit board 8 is mounted is closely adhered and fixed. The glass epoxy substrate 117
The upper electronic component 118 and the circuit use the same components as those of the TAB package product whose outer shape can be made smaller than the DIP package product of the present embodiment. This makes it possible to reduce costs and increase the efficiency of assembly work.

Further, each electric wire 122 of the cable 119 is soldered to a semicircular through hole 123 provided on a side surface of the glass epoxy board 117. Here, a cable fixing member 120 is bonded and fixed to the cable 119 at the base of each of the electric wires 122 exposed from the cable 119.

Outside the solid-state image sensor 115, a shield member 121 is positioned with respect to the housing 114 so that the UP direction of the solid-state image sensor 115 is in a designated direction, and is fixed by screws. Further, an adhesive 124 is firmly filled between the solid-state imaging device 115, the glass epoxy substrate 117, and the cable fixing member 120.

The cable fixing member 120 is fixed to the shield member 121 with fixing screws 125.
The head of the fixing screw 125 is set to have a length protruding from the outer peripheral surface of the shield member 121, and the protruding portion also has a function of positioning the switch unit or the switch pedestal 126 in the rotation direction.

FIG. 9 shows a wiring state of the leads 127 of the solid-state imaging device 115, the glass epoxy board 117, and the electric wire 122. Here, the cable 11
Nine of the at least a plurality of electric wires 122 are directly connected to the leads 127 in semicircular through holes 123 provided on the side surface of the glass epoxy substrate 117. Therefore, the work of soldering the lead 127 and the glass epoxy board 117 and the work of soldering the glass epoxy board 117 and the electric wire 122 can be performed simultaneously.

FIG. 10 shows the pattern surface of the glass epoxy substrate 117 viewed from the FF direction in FIG. Here, the pattern surface extending over the entire surface of the glass epoxy substrate 117 is the GND surface 128. This GND surface 12
8 shields high-frequency noise generated on the circuit board on the back surface of the glass epoxy substrate 117 so as not to be mounted on the solid-state imaging element 115.

FIG. 11 shows an assembling procedure for aligning the optical axis center O1 of the solid-state image sensor 115 with the optical axis center of the housing 114. Here, the outer shape of the flare mask 116 is formed in, for example, a substantially rectangular shape as shown in FIG. Further, as shown in FIG.
4, a concave portion 129 having exactly the same shape as the outer shape of the flare mask 116 is formed on the rear end surface side.

The outer dimensions (L1, L2) of the flare mask 116 are determined by the outer dimensions (L
3, L4). That is, L1> L3, L2>
L4 is set.

Then, the center O of the optical axis of the solid-state
An assembling procedure for aligning 1 with the center of the optical axis of the housing 114 is as follows. First, the solid-state imaging device 115 is not covered with the flare mask 116 over the effective pixel area 130, that is, the optical axis center O1 of the solid-state imaging device 115
And the optical axis center of the flare mask 116 are aligned and fixed.

Thereafter, an adhesive fixing unit of the solid-state image sensor 115 and the flare mask 116 is attached to the housing 11.
4 and is fixed by bonding. here,
With respect to the center of the housing 114, that is, the center of the optical axis, the concave portion 1
Since the center of 29 is positioned, the center of the optical axis of the housing 114 and the center of the optical axis O1 of the solid-state image sensor 115 can be easily positioned without adjustment work just by dropping the unit. Further, since no adjustment work is required, there is no generation of dust and scratches.

The present invention is not limited to the above embodiment. For example, an inductor may be used instead of the ferrite core 51 as an assembly component. Further, it goes without saying that various modifications can be made without departing from the spirit of the present invention. Next, other characteristic technical matters of the present application will be additionally described as follows. (Additional Item 1) A camera head unit detachably connected to an endoscope eyepiece unit and having a built-in imaging optical system including an imaging element that converts an endoscope into an electric signal, and a camera head unit. And a camera connector unit for processing the received electric signal and outputting the image signal to the monitor as an imaging signal, and wherein the endoscope imaging device incorporating the ferrite core serving as a noise absorber has a member for fixing the ferrite core elastically. An endoscope imaging device comprising a material.

(Additional Item 2) An endoscope image pickup device characterized in that the ferrite core fixing member formed of an elastic material is fixed to the rigid member by being applied between the rigid member and the ferrite core.

(Additional Item 3) An endoscope imaging apparatus, wherein the ferrite core fixing member formed of an elastic material is formed in an O-ring shape.

(Conventional Techniques of Supplementary Items 1 to 3) A ferrite core is built in the camera head as a countermeasure against static electricity. A fixing nut is used to fix this ferrite core.

(Problems to be Solved by Additional Items 1 to 3)
In this case, the camera head must be extended in the axial direction by the thickness of the nut, so that the camera head becomes large, and the operability of the endoscope is deteriorated.
In addition, since a thread cutting process is required, the processing cost is increased accordingly, and the product cost is increased. Further, in conventional products, when fixing a ferrite core or the like inside the product, screws or an adhesive are used, so that the number of parts increases and the curing time is increased.

(Object of Supplementary Items 1 to 3) A method of assembling a product by an inexpensive and simple method is provided.

(Means for Solving the Problems in Additional Items 1 to 3) An assembling method characterized in that parts to be assembled to a product are elastically fixed by an elastic member such as an O-ring. The ferrite core was fixed with an O-ring.

(Effects of Additional Items 1 to 3) The O-ring structure is simple and inexpensive, and the space required for fixing the ferrite core is minimized. In addition, since the camera head can be downsized, the operability of the endoscope is also improved.

(Additional Item 4) A solid-state imaging device camera characterized in that a flare mask larger than the outer shape of the CCD cover glass is positioned on the cover glass and bonded, and then the unit is dropped into a C holder and bonded.

(Prior Art in Appendix 4) Conventionally, after the picture is displayed on the monitor, the centering is adjusted by adjusting the CCD positioning screw.

(Problem to be Solved by Additional Item 4) Therefore, dust and scratches were easily generated by the centering work.

(Purpose of Additional Item 4) Improvement of CCD positioning operation.

(Additional Item 5) A solid-state image pickup device camera characterized in that a screw for fixing the cable tongue positioned with respect to the CCD is used as a positioning screw of the switch unit.

(Prior Art in Appendix 5) CC with Switch
In the D camera, the switch unit is conventionally positioned on the casing.

(Problem to be Solved by Additional Item 5) Therefore, if the UP of the CCD and the UP of the casing are shifted,
There was also a possibility that the switch unit was shifted.

(Purpose of Supplementary Item 5) Hara Low (Supplementary Item 6) In an electronic endoscope and a solid-state imaging device camera using a CCD different in only a TAB product and a dip product, an electronic device used in the CCD of the dip product A solid-state imaging device camera characterized in that parts and circuits are shared with electronic parts and circuits used in TAB products.

(Problem to be Solved by Additional Item 6) Even if the chip is the same, if the package is different, electronic components are selected according to the package size, whereby the circuit is often non-common. The assembly workability was deteriorated.

(Purpose of Supplementary Item 6) Efficiency of work and work efficiency by common use of electronic parts and circuits.

(Means for Solving the Problem in Additional Item 6)
The electronic components and circuits on the substrate were the same as those of a TAB package CCD (not shown) smaller than the dip package CCD shown in the above figure.

(Effect of Supplementary Item 6) Solution to the Problems (Additional Item 7) A solid-state image pickup device characterized in that an entire GND is provided on the back surface of a substrate, and the entire GND surface side is adhered and fixed to the back surface of the CCD. Element camera.

(Problem to be Solved by Additional Item 7) C
The noise generated on the circuit board behind the CD may disturb the image on the CCD or may be radiated to the outside through the front lens.

(Purpose of Supplementary Item 7) High-frequency noise generated on the circuit board was shielded so as not to get on the CCD.

(Supplementary Note 8) A solid-state imaging device camera characterized in that at least a plurality of electric wires are directly connected to CCD leads in side hole lands on the side of the substrate.

(Prior Art in Additional Item 8) There has been a solid-state imaging device camera in which a substrate is provided behind a CCD.

(Problem to be Solved by Additional Item 8) C
The land for the lead foot of the CD and the land for the cable were separate. Therefore, SO work is difficult.

(Purpose of Supplementary Item 8) Improvement of wiring work and shortening of the hard tip end.

[0097]

According to the first aspect of the present invention, the fixing member for fixing the component to be attached to the component receiving portion inside the camera head portion is made of an elastic material, and is disposed inside the camera head portion. Since the fixing means for fixing the fixing member by sandwiching the fixing member between the rigid member and the assembled component is provided, it is possible to reduce the size of the entire camera head and improve the operability of the endoscope, An inexpensive endoscope imaging device can be provided.

According to the second aspect of the present invention, at the time of assembling the ferrite core into the component receiving portion inside the camera head portion, the fixing member made of an elastic material is set with the ferrite core set in the component receiving portion. The camera head is fixed so that it can be sandwiched between the rigid member and the ferrite core provided inside the camera head, so that the entire camera head can be downsized and the operability of the endoscope can be improved. Thus, an inexpensive endoscope imaging device can be provided.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an entire system of an endoscope apparatus using an endoscope imaging apparatus according to a first embodiment of the present invention.

FIG. 2 is a longitudinal sectional view showing an internal configuration of a camera head unit in the endoscope imaging apparatus according to the first embodiment.

FIG. 3 is a longitudinal sectional view showing an internal configuration of a camera connector unit in the endoscope imaging apparatus according to the first embodiment.

FIG. 4 is a longitudinal sectional view showing an internal configuration of an image pickup unit of a camera head unit in the endoscope image pickup apparatus according to the first embodiment.

FIG. 5 is a longitudinal sectional view showing an internal configuration of a cable unit of a camera head unit in the endoscope imaging apparatus according to the first embodiment.

FIG. 6 shows a second embodiment of the present invention.
(A) is a longitudinal sectional view showing the internal configuration of the camera head,
(B) is a sectional view taken along line BB of (A).

FIG. 7 is a schematic configuration diagram of an entire system of an endoscope apparatus using an endoscope imaging apparatus according to a third embodiment of the present invention.

FIG. 8 is a longitudinal sectional view of a main part showing an internal configuration of a camera head unit in an endoscope imaging apparatus according to a third embodiment.

FIG. 9 is a perspective view of a main part showing a wiring state of a lead of a solid-state imaging device, a glass epoxy substrate, and an electric wire in the endoscope imaging apparatus according to the third embodiment.

FIG. 10 is a plan view showing a pattern surface of a glass epoxy substrate in an endoscope imaging apparatus according to a third embodiment.

FIG. 11 is an exemplary perspective view showing an assembling procedure for aligning the center of the optical axis of the solid-state imaging device with the center of the optical axis of the housing in the endoscope imaging apparatus according to the third embodiment;

FIG. 12 is a longitudinal sectional view of a main part showing an internal configuration of a camera head unit in a conventional endoscope imaging apparatus.

[Explanation of symbols]

 2 rigid endoscope (endoscope) 11 eyepiece 13 camera head 14 camera connector 22 imaging optical system 26 solid-state imaging device (CCD) 28 signal cable (electric cable) 34 switch fixing stand (rigid member) 41 switch cable (Electrical cable) 49 Ferrite core mounting groove (part receiving part) 51 Ferrite core (assembled part) 52 O-ring (fixing member) 53 Fixing means

Claims (2)

[Claims] 1. An endoscope which is detachably connected to an eyepiece of an endoscope,
A camera head unit having an imaging optical system including an imaging element for converting an observation image of the endoscope into an electric signal and other electric components, and a camera connector unit for connection to an external device; In an endoscope imaging apparatus in which an electric component incorporated in a head unit and the camera connector unit are connected via an electric cable, an assembling component to be assembled to a component receiving unit inside the camera head unit A fixing member for fixing the fixing member is made of an elastic material, and fixing means is provided for fixing the fixing member such that the fixing member is sandwiched between a rigid member disposed inside the camera head portion and the assembly component. An endoscope imaging apparatus characterized in that: 2. The device according to claim 1, wherein the assembly component is a ferrite core or an inductor, which is disposed around the electric cable and is a substantially cylindrical noise absorber. Endoscope imaging device.