JP6576098B2 - Medical camera device - Google Patents

Description

  The present disclosure relates to a medical camera device.

  Conventionally, in the medical field, a camera device such as an endoscope device has been used to observe an observation target. In such a camera device, a technique has been proposed in which an identification member is arranged on an observation device in order to identify various types of information indicating the purpose and function of the device.

  For example, Patent Document 1 discloses a technique in which an identification ring is fitted and arranged on the outer surface of a casing of an endoscope apparatus.

  Further, for example, Patent Document 2 discloses a technique in which an identification member is arranged on a plug connected to a cable control device that connects an endoscope and a control device.

JP 2012-130367 A JP 2005-168769 A

  By the way, in such a camera device, for example, a medical camera head (hereinafter, also simply referred to as a camera head) that images an observation target with a built-in imaging device such as an endoscope camera head connected to a rigid endoscope. Is used. The camera head outputs an image signal obtained by imaging to another device via a connected signal transmission unit such as a cable. Then, an image to be observed obtained by the camera device is recorded or displayed on a display device so that a plurality of people can observe the image during surgery. In addition, the camera head is held by the user for the purpose of moving the camera head to move the position in the observation target to be observed or pressing a switch provided on the camera head to perform various operations of the camera head. Used in state.

  However, in the case of a camera head, since it is gripped by the user, if an existing technology related to the camera device is applied, an unnecessary protrusion is formed on the portion that is exposed to the outside and is gripped by arranging a member for identification. There was a case of letting. For example, by arranging a member for identification at the outer end of the camera head, it is expected that the identification performance is improved without forming unnecessary convex portions. The location may be a location where watertightness or airtightness is required, for example, a member that covers an electronic component such as a signal transmission unit is connected. In particular, medical camera devices are exposed to liquids for autoclave sterilization and chemical sterilization. However, in the techniques disclosed in Patent Document 1 and Patent Document 2, since a member for identification is arranged on the outer peripheral portion of the casing, the watertightness of the part is required at a place where watertightness or airtightness is required. It is difficult to arrange an annular member for identification while ensuring the above.

  Therefore, the present disclosure proposes a new and improved medical camera device without impairing discrimination.

  According to the present disclosure, a camera head including a first housing that houses an image sensor, a cable unit that is connected to the camera head and transmits at least an image signal from the image sensor, and the cable unit are inserted. A signal transmission unit comprising a cylindrical second housing, an annular member sandwiched between the first housing and the second housing and having an outer peripheral surface for identifying the type of the camera head; There is provided a medical camera device comprising: an annular seal member fixed by the first housing, the second housing, and the annular member.

  As described above, according to the present disclosure, it is possible to propose a new and improved medical camera device without impairing discrimination.

  Note that the above-mentioned effects are not necessarily limited, and any of the effects shown in this specification or other effects that can be grasped from this specification are provided together with or in place of the above-described effects. It may be played.

It is explanatory drawing which shows schematic structure of an example of the endoscope apparatus which concerns on embodiment of this indication. It is sectional drawing which shows schematic structure of an example of the periphery of the camera head which concerns on embodiment of this indication. FIG. 3 is an enlarged view of the periphery of the switch shown in FIG. 2. FIG. 3 is an enlarged view of a region including a first seal member and a configuration around the first seal member illustrated in FIG. 2. It is explanatory drawing which shows an example of a structure of a 2nd housing | casing part. It is sectional drawing of the camera head in a cross section perpendicular | vertical to the connection direction of a 1st housing | casing part and a 2nd housing | casing part. It is a disassembled perspective view which shows schematic structure of an example of the periphery of the camera head which concerns on embodiment of this indication. It is an enlarged view of the area | region containing the surroundings of the 1st sealing member which concerns on a 1st modification, and a 1st sealing member. It is an enlarged view of the area | region containing the structure around the 1st sealing member which concerns on a 2nd modification, and a 1st sealing member. It is an enlarged view of the area | region containing the structure around the 1st sealing member which concerns on a 3rd modification, and a 1st sealing member.

  Hereinafter, preferred embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. In addition, in this specification and drawing, about the component which has the substantially same function structure, duplication description is abbreviate | omitted by attaching | subjecting the same code | symbol.

The description will be made in the following order.
1. 1. Endoscope apparatus according to an embodiment of the present disclosure 2. Configuration around the camera head according to the embodiment of the present disclosure 2-1. Schematic configuration around the camera head 2-2. 2. Configuration around the first seal member Modification 3-1. First Modification 3-2. Second Modification 3-3. Third modification 4. Effect 5. Conclusion

<1. Endoscopic apparatus according to an embodiment of the present disclosure>
First, a schematic configuration of an endoscope apparatus 1 according to an embodiment of the present disclosure will be described with reference to FIG.

  FIG. 1 is an explanatory diagram illustrating a schematic configuration of an example of an endoscope apparatus 1 according to an embodiment of the present disclosure. The endoscope apparatus 1 is an example of a medical camera apparatus according to the present disclosure. As shown in FIG. 1, the endoscope apparatus 1 includes an insertion unit 10, a light source device 20, a light guide 30, a camera head 40, a cable 50, a control device 60, and a display device 70. .

  The insertion unit 10 has an elongated shape and includes an optical system that collects incident light. The distal end of the insertion unit 10 is inserted into a patient's body cavity, for example. The rear end of the insertion unit 10 is detachably connected to the front end of the camera head 40. The insertion unit 10 is connected to the light source device 20 through the light guide 30 and is supplied with light from the light source device 20.

  The light source device 20 is connected to the insertion unit 10 via the light guide 30. The light source device 20 supplies light to the insertion unit 10 via the light guide 30. The light supplied to the insertion unit 10 is emitted from the distal end of the insertion unit 10 and irradiated to an observation target such as a tissue in a body cavity of a patient. Then, the reflected light from the observation target is collected by the optical system in the insertion unit 10.

  The camera head 40 has a function of imaging an observation target. The camera head 40 is connected to the control device 60 via a cable 50 that is a signal transmission unit. The camera head 40 images the observation object by photoelectrically converting the reflected light from the observation object collected by the insertion unit 10, and outputs an image signal obtained by the imaging to the control device 60 via the cable 50. . Details of the camera head 40 will be described later.

  The control device 60 controls the camera head 40, performs predetermined processing on the image signal output from the camera head 40, and then outputs the image signal to the display device 70. Note that the control device 60 may store an image to be observed based on the image signal.

  The display device 70 displays an image to be observed based on the image signal output from the control device 60. The function is realized by, for example, a CRT (Cathode Ray Tube) display device, a liquid crystal display (LCD) device, or an organic EL display (Organic Light Emitting Diode) device. The image of the observation target displayed by the display device 70 is observed by a plurality of people during the operation, for example.

<2. Configuration around Camera Head According to Embodiment of Present Disclosure>
(2-1. Schematic configuration around camera head)
Next, a schematic configuration around the camera head 40 according to the embodiment of the present disclosure will be described with reference to FIG.

  FIG. 2 is a cross-sectional view illustrating a schematic configuration of an example of the periphery of the camera head 40 according to the embodiment of the present disclosure. As shown in FIG. 2, the camera head 40 includes a coupler unit 110, a first housing unit 130, a lens unit 150, a main board 170 that is an imaging board, a connector connection board 190, and a switch connection board. 210.

  The coupler unit 110 is provided at the tip of the camera head 40 and is detachably connected to the insertion unit 10. A first housing part 130 is provided at the rear end of the coupler part 110.

  The first housing unit 130 includes a front housing 131, a rear housing 133, a switch 135 provided on the outer peripheral surface of the front housing 131, and a connector provided at the rear end of the rear housing 133. 137. The first casing 130 accommodates the lens unit 150, the main board 170, the connector connection board 190, and the switch connection board 210 in an airtight manner. This prevents foreign matter such as moisture from entering the inside of the first housing part 130.

  The front housing 131 and the rear housing 133 are, for example, titanium, titanium alloy, or SUS metal housings having a substantially cylindrical shape, and are joined by welding, for example. The outer peripheral surface of the front housing 131 is an example of the first outer peripheral surface according to the present disclosure, and the outer peripheral surface of the portion of the rear housing 133 excluding the flange portion connected to the front housing 131 is the first outer surface. It is an example of the 2nd outer peripheral surface which concerns on this indication whose cross-sectional external shape is smaller than outer peripheral surface of this. At least the distal end portions of the annular member 250, the first seal member 270, and the second housing portion 230 are disposed through the second outer peripheral surface.

  The first seal member 270 fitted to the inner peripheral portion of the annular member 250 and the annular member 250 from the rear housing 133 side at the step portion between the first outer peripheral surface and the second outer peripheral surface. The second casing 230, which is a part of the cable 50, is connected via the cable. The annular member 250 is sandwiched between the step portion between the first outer peripheral surface and the second outer peripheral surface and the second housing portion 230. Accordingly, the outer surface of the rear casing 133 is covered with the annular member 250, the first seal member 270, and the second casing portion 230. The lens unit 150, the main board 170, the connector connection board 190, and the switch connection board 210 are covered with the front housing 131 and the rear housing 133. Details of the front housing 131 and the rear housing 133 will be described later.

  The switch 135 is provided on the outer peripheral surface of the front housing 131 and is connected to the image sensor mounting portion 171 via the switch connection board 210. For example, one or a plurality of switches 135 are provided, and the user can perform various operations by pressing the switch 135.

  FIG. 3 is an enlarged view of the periphery of the switch 135 provided on the outer peripheral surface of the front housing 131 shown in FIG. As shown in FIG. 3, a hermetic connector 902 having a plurality of pins 903 made of a conductive member is inserted into and joined to a through hole 900 provided in the front casing 131 around the switch 135. The joint surface between the hermetic connector 902 and the through hole 900 is joined by, for example, soldering or welding. In addition, when joining by solder, surface treatment part 901, such as gold plating and Ni plating, is provided in the joint surface of hermetic connector 902 and penetration hole 900, for example, while improving solder wettability, for example, gold tin solder is used. Use to join. With such a configuration, the inside of the first housing portion 130 is kept airtight or watertight.

  Note that when the medical camera head is sterilized using an autoclave, the temperature increases and decreases. Therefore, it is preferable that the difference in coefficient of thermal expansion between the front housing 131 and the hermetic connector 902 is small. For example, when the material of the front housing 131 is titanium or a titanium alloy, the same portion of the hermetic connector 902 that joins the front housing 131 is preferably the same titanium, titanium alloy, or Kovar. When the material of the front housing 131 is SUS, the same portion of the hermetic connector 902 that joins the front housing 131 is preferably SUS or Kovar.

  Then, by connecting the switch connection board 210 positioned inside the front casing 131 and the switch board 905 positioned outside the front casing 131 to the plurality of pins 903 of the hermetic connector 902 by solder or the like, The switch connection board 210 and the switch board 905 are electrically connected. The switch substrate 905 is provided with a membrane portion 906 using a metal dome contact as a sensing portion, for example. In addition, a switch sheet 136 that covers the switch substrate 905 is provided on the switch substrate 905. The switch sheet 136 is fixed to the front housing 131 by using or fitting a mounting member such as a screw or a double-sided tape. A switch 135 is provided at a position of the switch sheet 136 located above the membrane portion 906. Then, when the user presses down the switch 135 provided on the upper part of the membrane unit 906, the membrane unit 906 is pressed down, and the pressing operation of the switch 135 can be detected.

  With such a configuration, an instruction from the outside of the first housing part 130 can be transmitted to the inside of the first housing part 130 that is kept airtight and watertight. When the switch 135 is repeatedly pressed by the user, there is a concern about the wear of the switch 135 and the metal dome contact of the membrane portion 906 of the switch substrate 905. In this case, the switch seat 136 including the switch 135 can be replaced by releasing and removing the switch seat 136 from the front housing 131. Further, the switch substrate 905 including the membrane portion 906 can be replaced by releasing and removing the fixing of the switch substrate 905 from the plurality of pins 903 with solder. In this manner, the switch 135 and the switch board 905 can be easily exchanged from the outside of the first casing unit 130 while the inside of the first casing unit 130 is kept airtight and watertight. It becomes.

  The connector 137 is an example of a connection unit according to the present disclosure. As shown in FIG. 2, the connector 137 penetrates the rear end of the rear casing 133 and is connected to the rear casing 133 by, for example, welding. A front end portion of the connector 137 is disposed inside the first housing portion 130, and a rear end portion of the connector 137 is disposed outside the first housing portion 130. The rear end portion of the connector 137 is connected to the cable portion of the cable 50 outside the first housing portion 130.

  The lens unit 150 is provided at the front end of the first housing part 130. At the rear end of the lens unit 150, an image sensor mounting unit 171 on which an image sensor such as a CMOS (Complementary Metal Oxide Semiconductor) image sensor or a CCD (Charge Coupled Device) image sensor is mounted is disposed. The lens unit 150 focuses the reflected light from the observation target emitted from the insertion unit 10 connected to the coupler unit 110, thereby forming an image of the observation target on the imaging surface of the imaging element.

  The main board 170 has three rigid parts: an image sensor mounting unit 171 on which an image sensor is mounted, a signal processing unit 173 on which a signal processing circuit is mounted, and an electronic component mounting unit 175 on which electronic components such as a power supply circuit are mounted. Is provided. The signal processing unit 173 and the image sensor mounting unit 171, and the signal processing unit 173 and the electronic component mounting unit 175 are electrically connected by flexible units, respectively. The main board 170 is accommodated in the first housing part 130 in a state where the flexible part is bent.

  The imaging element mounting unit 171 acquires an image signal indicating the observation target by photoelectrically converting the reflected light from the observation target collected by the lens unit 150 using the imaging element. Then, the imaging element mounting unit 171 outputs the obtained image signal to the signal processing unit 173 via the flexible unit. The signal processing unit 173 performs signal processing on the image signal output from the image sensor mounting unit 171. For example, the signal processing unit 173 processes the image signal and the control signal output from the image sensor mounting unit 171. The number of pixels and the resolution of the image sensor mounted on the image sensor mounting unit 171 are not particularly limited, but the number of pixels is 1280 × 720, 1920 × 1080, 3840 × 2160, 7680 × 4320 or more, and the resolution is higher. It may be high vision, 4K, 8K, or higher.

  The signal processing unit 173 is electrically connected to the cable 50 via the connector connection board 190 and the connector 137. Then, the signal processing unit 173 outputs the image signal subjected to the signal processing to the cable 50 via the connector connection board 190 and the connector 137. The electronic component mounting unit 175 mainly performs power supply to the signal processing unit 173 and power control.

  The connector connection board 190 connects the signal processing unit 173 and the connector 137. The connector connection board 190 includes two rigid portions and a flexible portion that connects the two rigid portions. One rigid part is connected to the rear end of the signal processing unit 173, and the other rigid part is connected to the front end of the connector 137.

  The switch connection board 210 transmits an operation corresponding to the pressed state of the switch 135 to the image sensor mounting unit 171. The switch connection board 210 may be a flexible board, for example.

  The second housing portion 230 that is a part of the cable 50 is a housing having a substantially cylindrical shape. In the case where the camera head is made to correspond to the autoclave, the second casing unit 230 is made of a resin that is resistant to high-temperature and high-pressure steam in autoclave sterilization. Specifically, as the resin constituting the second housing portion 230, ABS resin, nylon, PP (polypropylene), PMMA (polymethyl methacrylate), PU (polyurethane), PC (polycarbonate), PBT (polybutylene) Terephthalate), PA (polyamide), PPO (polyphenylene oxide) (registered trademark), SPS (syndioctatic polystyrene) (registered trademark), PES (polybutylene succinate carbonate), PPS (polyphenylene sulfide), PEI (polyether) Imido), LCP (polycyclohexylene / dimethylene / terephthalate), PC / ABS, PC / ASA (acrylate styrene acrylonitrile), PEEK (peak), and the like can be applied. In consideration of chemical resistance for sterilization and sterilization, as the resin constituting the second housing portion 230, PEEK (polyetheretherketone), PEI (polyetherimide), PPSU (polyphenylsulfur) are particularly preferable. Phon), PPS (polyphenylene sulfide), PAR (amorphous polyarylate), and PSF (polysulfone). The metal front housing 131 and the second housing portion 230 made of conductive resin form a structure that forms the outer surface of the camera head 40.

  The second housing portion 230 that is a part of the cable 50 is a cylindrical member into which the cable portion of the cable 50 is inserted. Here, the cable portion of the cable 50 is connected to the camera head 40 and transmits an image signal from at least the image pickup device of the image pickup device mounting portion 171. The outer diameter of the second housing portion 230 narrows from the front end side to the center, and is substantially constant from the center to the rear end side. The second housing part 230 is formed from the rear of the front housing 131 via the annular member 250 and the first seal member 270 fitted to the inner peripheral part of the annular member 250. Connected to the step. Accordingly, a part of the rear casing 133, the connector 137, the first seal member 270, and a part of the cable 50 are covered by the second casing portion 230 and the annular member 250. That is, the outer surface of the camera head 40 is configured by the front casing 131, the second casing 230, and the annular member 250 of the first casing 130, and when the user uses the camera head 40, The part is gripped. Details of the second casing 230 will be described later.

  The annular member 250 is an annular member made of a metal such as stainless steel or titanium, or a resin having resistance to high-temperature and high-pressure steam in autoclave sterilization. As the resin constituting the annular member 250, the resin that can constitute the second housing portion 230 described above can be applied. The annular member 250 is sandwiched between the first housing portion 130 and the second housing portion 230 and has an outer peripheral surface that identifies the type of the camera head 40. Specifically, the annular member 250 is sandwiched between the step portion between the first outer peripheral surface and the second outer peripheral surface of the first housing portion 130 and the tip portion of the second housing portion 230. The The annular member 250 identifies the camera head 40 by at least one of the color of appearance, the shape of appearance, and the printing of appearance.

  For example, the annular member 250 has a color of at least a part of the outer peripheral surface of the annular member 250 exposed to the outside, a shape such as a groove or a stamp formed on the outer peripheral surface of the annular member 250, and printing of the outer peripheral surface of the annular member 250. For example, the camera head 40 is identified. The outer peripheral surface of the annular member 250 may be colored by a plating process. Accordingly, the user can identify various types of information indicating the purpose and function of the camera head 40 by visually recognizing the appearance color, appearance shape, appearance printing, and the like of the annular member 250. In addition, the connection portion between the second housing portion 230 and the first housing portion 130 in which the annular member 250 is disposed is a portion where the outer diameter is substantially maximum in the housing of the camera head 40. The details of the annular member 250 will be described later.

  The first seal member 270 is a substantially ring-shaped seal member made of silicon resin or the like that is resistant to high-pressure steam. The first seal member 270 ensures watertightness at a location where the second housing portion 230 and the first housing portion 130 that cover a part of the connector 137 and the cable 50 that are electronic components are connected. Provided. The first seal member 270 is fixed by the first housing part 130, the second housing part 230, and the annular member 250. At this time, the first seal member 270 is in surface contact with the annular member 250, the first housing portion 130, and the second housing portion 230. Details of the first seal member 270 will be described later.

  The adjustment member 290 is a substantially cylindrical member that is provided at the rear end portion of the second housing portion 230 and covers a part of the cable 50. The adjustment member 290 adjusts the relative position of the second casing unit 230 with respect to the first casing unit 130 in the connection direction between the first casing unit 130 and the second casing unit 230. Specifically, the adjustment member 290 has a female screw portion 291 that is screwed into the external screw portion 51 provided on the outer peripheral portion of the cable portion of the cable 50, and the connection is made when the adjustment member 290 rotates. The relative position of the second housing part 230 with respect to the first housing part 130 in the direction is adjusted.

  More specifically, a part of the outer periphery of the cable portion of the cable 50 is provided with a male screw portion 51 in which a thread is formed. In addition, a screw groove 291 is provided in the inner peripheral portion of the adjustment member 290, so that a screw portion 291 is provided and is screwed into the male screw portion 51 of the cable portion of the cable 50. The leading end portion of the adjustment member 290 is connected to the rear end portion of the second housing portion 230 via the second seal member 310.

  When the adjustment member 290 rotates with respect to the cable 50, the adjustment member 290 moves in the axial direction of the female screw portion 291. As shown in FIG. 2, the axial direction of the female thread portion 291 is substantially parallel to the direction in which the step portion of the first housing portion 130 and the tip portion of the second housing portion 230 face each other. Thereby, the second casing unit 230 moves in the connecting direction between the first casing unit 130 and the second casing unit 230. Therefore, by rotating the adjustment member 290 using a tool such as a hook spanner, the relative position of the second casing 230 with respect to the first casing 130 can be adjusted as appropriate.

  The second seal member 310 is an annular seal member provided behind the second housing portion 230. The second seal member 310 is provided in order to ensure watertightness at a location where the second housing portion 230 that covers a part of the connector 137 and the cable 50 that are electronic components and the adjustment member 290 are connected. The second seal member 310 is sandwiched between the rear end portion of the second housing portion 230 and the front end portion of the adjustment member 290, and the rear end portion of the second housing portion 230 and the adjustment member 290 Makes surface contact with the tip.

(2-2. Configuration around the first seal member)
Next, the details of the configuration around the first seal member 270 will be described with reference to FIGS. 4 to 7. FIG. 4 is an enlarged view of the first seal member 270 shown in a rectangle in FIG. 2 and a region 500 including a configuration around the first seal member 270.

  As shown in FIG. 4, a protruding portion 131 </ b> A that protrudes toward the second housing portion 230 is provided on the outer peripheral portion of the rear end of the front housing 131. The rear housing 133 includes a substantially cylindrical side surface portion 133A and a flange portion 133B provided at the tip of the side surface portion 133A. The flange portion 133B of the rear housing 133 is fitted into the inner peripheral portion of the protruding portion 131A of the front housing 131, and the inner peripheral portion of the protruding portion 131A is joined to the outer peripheral portion of the flange portion 133B by welding. .

  The outer peripheral surface of the front housing 131 corresponds to the first outer peripheral surface according to the present disclosure, and the outer peripheral surface of the side surface 133A of the rear housing 133 has a smaller cross-sectional outer shape than the first outer peripheral surface. This corresponds to the second outer peripheral surface. The surface formed by the end surface of the protruding portion 131A of the front housing 131 and the rear surface of the flange 133B of the rear housing 133 (the surface on the second housing portion 230 side) is the first outer peripheral surface and the first outer surface. 2 corresponds to a stepped portion with the outer peripheral surface.

  An annular convex portion 231 that protrudes toward the step portion of the first housing portion 130 is provided on the inner peripheral side at the distal end portion of the second housing portion 230. As shown in FIG. 4, the annular convex portion 231 is disposed between the outer peripheral surface of the side surface portion 133 </ b> A of the rear housing 133 and the inner peripheral surface of the annular member 250.

  The annular convex portion 231 includes an outer peripheral surface and an annular surface of the side surface portion 133A of the rear housing 133 in order to regulate the distance between the outer peripheral surface of the side surface portion 133A of the rear housing 133 and the inner peripheral surface of the annular member 250. Ribs 235 and ribs 237 that are in contact with the inner peripheral surface of the member 250 are provided. The rib 235 and the rib 237 are provided on the inner peripheral surface and the outer peripheral surface of the annular convex portion 231, and are disposed to face each other via the annular convex portion 231. The surface 235A of the rib 235 facing the inner side of the annular convex portion 231 is in contact with the outer peripheral surface of the side surface portion 133A of the rear housing 133, and the surface 237A of the rib 237 facing the outer side of the annular convex portion 231 is the inner peripheral surface of the annular member 250. Touch. Thereby, the load applied to the annular member 250 from the outside is supported by the rib 237, the annular convex portion 231, the rib 235, and the rear housing 133. In the present embodiment, the rib 237 is provided on the annular convex portion 231, but the present invention is not limited thereto, and the rib 237 may be provided on the inner peripheral surface side of the annular member 250.

  FIG. 5 is an explanatory diagram illustrating an example of the configuration of the second casing unit 230. In FIG. 5, the second housing portion 230 viewed from the front housing 131 side is shown in the connection direction of the first housing portion 130 and the second housing portion 230. The shape of the annular convex portion 231 viewed from the front housing 131 side in the connecting direction of the first housing portion 130 and the second housing portion 230 has, for example, a substantially elliptical shape that is vertically long in the plane of FIG. The upper portion may have a substantially horizontal portion. A plurality of pairs of ribs 235 and ribs 237 are formed on the annular convex portion 231 so as to face each other via the annular convex portion 231. Thereby, the space | interval of the outer peripheral surface of 133 A of side parts of the rear side housing | casing 133 and the internal peripheral surface of the annular member 250 can be controlled. For example, the distance between the surface 235A of the rib 235 and the surface 237A of the rib 237 is set equal in all pairs. Thereby, the space | interval of the outer peripheral surface of 133 A of side parts of the rear side housing | casing 133 and the internal peripheral surface of the annular member 250 can be made constant in the arbitrary positions of the circumferential direction of 133 A of side parts and the annular member 250.

  6 is a cross-sectional view of the camera head 40 in the XX cross section shown in FIG. 4 that passes through the annular member 250 and is perpendicular to the connection direction of the first housing portion 130 and the second housing portion 230. . As shown in FIG. 6, the first seal member 270 is sandwiched between the outer peripheral surface of the side surface portion 133 </ b> A of the rear housing 133 and the inner peripheral surface of the annular member 250. The cross-sections of the side surface portion 133A, the annular member 250, and the first seal member 270 of the rear housing 133 are, for example, a vertically long, substantially elliptical shape in FIG. 6 as in the shape of the annular convex portion 231 shown in FIG. It may have a shape and may have a substantially horizontal portion on the upper side. The cross sections of the side surface portion 133A of the rear housing 133, the annular member 250, and the first seal member 270 may have a shape corresponding to the shape of the annular convex portion 231 of the second housing portion 230 shown in FIG. What is necessary is just and it is not limited to circular shape.

  The annular member 250 is sandwiched between the first housing part 130 and the second housing part 230. For example, as illustrated in FIG. 4, the annular member 250 includes the end surface of the protruding portion 131 </ b> A of the front housing 131, a part of the rear surface of the flange portion 133 </ b> B of the rear housing 133, and the second housing portion 230. It is clamped by the outer peripheral surface 233 of the tip. The annular member 250 may not contact a part of the rear surface of the flange portion 133B of the rear housing 133.

  The annular member 250 is bonded to the end surface of the protruding portion 131A of the front housing 131, a part of the rear surface of the flange portion 133B of the rear housing 133, and the surface 233 of the second housing portion 230 with an adhesive. May be. An annular groove 251 may be provided on the tip surface of the annular member 250. Thereby, an adhesive for adhering the annular member 250 to the first housing part 130 can be stored in the annular groove 251. Therefore, in the bonding between the annular member 250 and the first housing portion 130, the amount of adhesive provided to the portion where the annular member 250 and the first housing portion 130 are bonded can be increased. The area where the annular member 250 and the first housing part 130 are bonded by the adhesive can be increased. Therefore, it is possible to firmly bond the annular member 250 and the first housing portion 130 and improve the water tightness of the portion where the annular member 250 and the first housing portion 130 are bonded. . In the present embodiment, the annular groove 251 is provided in the annular member 250. However, the present invention is not limited to this, and the annular groove 251 may be provided on the first housing part 130 side or the second housing part 230 side.

  As shown in FIG. 4, the cross-sectional outer diameter of the annular member 250 that is a part of the portion that is gripped when the user uses the camera head 40 is the annular shape of the front casing 131 and the second casing 230. It is substantially the same as the cross-sectional outer diameter at the point where the member 250 contacts. Therefore, in the present embodiment, by disposing the annular member 250 that is a member for identification, unnecessary convex portions are not formed on the portion exposed to the outside and gripped. Further, the outer diameter of the annular member 250 may increase from the front end side and the rear end side toward the center portion. For example, as shown in FIG. 4, the stepped portion of the first housing portion 130 has an inner peripheral portion of the protruding portion 131 </ b> A of the front housing 131 and a rear housing 133 inside the outer peripheral surface of the annular member 250. You may have the welding part 330 with the outer peripheral part of the flange part 133B.

  The first seal member 270 is fixed by the first housing part 130, the second housing part 230, and the annular member 250. For example, as shown in FIG. 4, the first seal member 270 includes the inner peripheral surface of the annular member 250, the rear surface of the flange portion 133 </ b> B of the rear housing 133, and the outer peripheral surface of the side surface portion 133 </ b> A of the rear housing 133. , And the front end portion of the second housing portion 230. Specifically, the first seal member 270 is sandwiched between the annular convex portion 231 of the second housing portion 230 and the rear surface of the flange portion 133B of the rear housing 133, and the side surface portion 133A of the rear housing 133. And the inner peripheral surface of the annular member 250.

  Thereby, the 1st seal member 270 can be clamped in the direction orthogonal to the connection direction of the 1st case part 130 and the 2nd case part 230, and the connection direction concerned, respectively. Therefore, when the liquid enters the periphery of the first seal member 270, the deformation of the first seal member 270 due to the force applied from the entered liquid to the first seal member 270 can be suppressed in an arbitrary direction. it can. Therefore, it is possible to ensure the water tightness of the location where the second housing portion 230 and the first housing portion 130 that cover a part of the connector 137 and the cable 50 which are the electronic components shown in FIG. 2 are connected. it can.

  The first seal member 270 is in surface contact with the annular member 250, the first housing part 130, and the second housing part 230. For example, as shown in FIG. 4, the first seal member 270 includes the inner peripheral surface of the annular member 250, the rear surface of the flange portion 133 </ b> B of the rear housing 133, and the outer peripheral surface of the side surface portion 133 </ b> A of the rear housing 133. , And may be in surface contact with the annular convex portion 231 of the second housing portion 230. Thereby, the inner peripheral surface of the annular member 250, the rear surface of the flange portion 133 </ b> B of the rear housing 133, the outer peripheral surface of the side surface portion 133 </ b> A of the rear housing 133, and the annular convex portion 231 of the second housing portion 230. The contact area between each and the first seal member 270 can be increased.

  The respective surfaces of the annular member 250, the first housing portion 130, and the second housing portion 230 that are in contact with the first seal member 270 may be smooth surfaces. For example, as shown in FIG. 4, the inner peripheral surface of the annular member 250 that contacts the first seal member 270, the rear surface of the flange portion 133 </ b> B of the rear housing 133, and the outer periphery of the side surface portion 133 </ b> A of the rear housing 133. Each surface of the surface and the distal end portion of the second housing portion 230 may be a smooth surface. Thereby, the inner peripheral surface of the annular member 250, the rear surface of the flange portion 133B of the rear housing 133, the outer peripheral surface of the side surface portion 133A of the rear housing 133, and the front end portion of the second housing portion 230, respectively. And the first seal member 270 can be improved. For example, the center line average surface roughness Ra of the smooth surface is 1.6 μm or less. Specifically, the smooth surface is formed by polishing if it is a metal part, and is formed by polishing the corresponding surface of a mold if it is an injection molded resin part.

  FIG. 7 is an exploded perspective view illustrating a schematic configuration of an example of the periphery of the camera head 40 according to the embodiment of the present disclosure. In assembling the camera head 40, after the first housing portion 130 is assembled, the first seal member 270 is fitted to the outer peripheral surface of the side surface portion 133 </ b> A of the rear housing 133. Next, the annular member 250 is fitted to the outer peripheral portion of the first seal member 270. The cable 50 is connected to the rear end of the connector 137. Next, the female thread portion 291 of the adjustment member 290 is screwed into the male thread portion 51 of the cable. Then, by rotating the adjustment member 290, the second housing portion 230 connected to the adjustment member 290 via the second seal member 310 moves to the first housing portion 130 side. Then, the annular member 250 and the first seal member 270 are sandwiched between the step portion of the first housing portion 130 and the tip portion of the second housing portion 230.

<3. Modification>
In the above description, the details of the configuration around the first seal member 270 and the first seal member 270 have been described with reference to FIGS. 4 to 7, but the first seal member 270 and the first seal member 270 have been described. The configuration around is not limited to such an example, and may be another configuration. Hereinafter, the 1st sealing member 270 which concerns on each modification, and the structure around the 1st sealing member 270 are demonstrated.

(3-1. First Modification)
FIG. 8 is an enlarged view of a region including the first seal member 270 and the configuration around the first seal member 270 according to the first modification. A second annular convex portion that protrudes toward the stepped portion of the first casing portion 130 on the inner peripheral side at the tip of the annular convex portion 231 of the second casing portion 530 according to the first modification. 501 is provided. The tip end portion of the second annular convex portion 501 is in contact with the step portion of the first housing portion 130.

  In the first modification example, as shown in FIG. 8, the first seal member 270 includes the inner peripheral surface of the annular member 250, the rear surface of the flange portion 133 </ b> B of the rear housing 133, and the second housing portion 530. The second annular convex portion 501 and the stepped portion 503 between the annular convex portion 231 and the second annular convex portion 501 of the second casing 530 are fixed. Specifically, the first seal member 270 includes the stepped portion 503 between the annular convex portion 231 and the second annular convex portion 501 of the second casing portion 530 and the rear surface of the flange portion 133B of the rear casing 133. And is sandwiched between the outer peripheral surface of the second annular convex portion 501 and the inner peripheral surface of the annular member 250 of the second housing portion 530. Accordingly, the first seal member 270 can be sandwiched in the connection direction between the first housing portion 130 and the second housing portion 530 and in the direction orthogonal to the connection direction.

  In the first modified example, the rib 237 may be provided on the annular convex portion 231 or may be provided on the inner peripheral surface side of the annular member 250.

(3-2. Second Modification)
FIG. 9 is an enlarged view of a region including the first seal member 270 and the configuration around the first seal member 270 according to the second modification. An annular member projecting portion 601 that projects toward the inner peripheral side is provided on the distal end side of the annular member 650 according to the second modification. The inner peripheral portion of the annular member protruding portion 601 is in contact with the outer peripheral surface of the side surface portion 133A of the rear housing 133.

  In the second modified example, as shown in FIG. 9, the first seal member 270 includes an inner peripheral surface 603 on the rear end side of the annular member 650, a rear surface, and a rear side of the annular member protrusion 601 of the annular member 650. It is fixed by the outer peripheral surface of the side surface portion 133 </ b> A of the housing 133 and the tip portion of the annular convex portion 231 of the second housing portion 230. Specifically, the first seal member 270 is sandwiched between the front end portion of the annular convex portion 231 of the second housing portion 230 and the rear surface of the annular member protruding portion 601 of the annular member 650, and The outer peripheral surface of the side surface portion 133A and the inner peripheral surface 603 on the rear end side of the annular member 650 are sandwiched. Thereby, the 1st seal member 270 can be clamped in the direction orthogonal to the connection direction of the 1st case part 130 and the 2nd case part 230, and the connection direction concerned, respectively.

  In the second modification, the rib 237 may be provided on the annular convex portion 231 or may be provided on the inner peripheral surface 603 side on the rear end side of the annular member 650.

(3-3. Third Modification)
FIG. 10 is an enlarged view of a region including the first seal member 270 and the configuration around the first seal member 270 according to the third modification. The annular convex portion 701 of the second housing portion 730 according to the third modification is on the tip side of the second housing portion 730 so as to protrude toward the step portion of the first housing portion 130. Provided on the outer peripheral side. In addition, a rib 803 that is in contact with the outer peripheral surface of the side surface portion 133A of the rear housing 133 is provided on the inner peripheral surface of the annular member 850 according to the third modification.

  In the third modified example, as illustrated in FIG. 10, the annular member 850 is sandwiched between the stepped portion of the first housing portion 130 and the distal end portion of the annular convex portion 701 of the second housing portion 730. . The first seal member 270 includes an inner peripheral surface of the annular convex portion 701 of the second housing portion 730, a rear surface of the annular member 850, an outer peripheral surface of the side surface portion 133A of the rear housing 133, and a second surface. The housing portion 730 is fixed by the inner peripheral surface 703 of the tip portion. Specifically, the first seal member 270 is sandwiched between the inner peripheral surface 703 of the front end portion of the second housing portion 730 and the rear surface of the annular member 850, so that the side surface portion 133 </ b> A of the rear housing 133 is It is sandwiched between the outer peripheral surface and the inner peripheral surface of the annular convex portion 701 of the second housing portion 730. Accordingly, the first seal member 270 can be sandwiched in the connection direction between the first housing portion 130 and the second housing portion 730 and in the direction orthogonal to the connection direction.

  In the third modified example, the annular convex portion 701 is not provided with a rib, and the side surface portion 133A of the rear housing 133 is formed on the inner peripheral surface of the second housing portion 730 behind the annular convex portion 701. Ribs 705 are provided in contact with the outer peripheral surface.

  Moreover, in each modification demonstrated using FIGS. 8-10, the 1st sealing member 270 may surface-contact with each of each member which contact | connects the 1st sealing member 270. FIG. Further, each surface of each member in contact with the first seal member 270 may be a closed smooth surface.

<4. Effect>
According to the embodiment described above, the annular member 250 is sandwiched between the first housing part 130 and the second housing part 230. The first seal member 270 is fixed by the first housing part 130, the annular member 250, and the second housing part 230.

  Accordingly, the first seal member 270 can be sandwiched in two directions substantially orthogonal to each other. Therefore, when the liquid enters the periphery of the first seal member 270, the deformation of the first seal member 270 due to the force applied from the entered liquid to the first seal member 270 can be suppressed in an arbitrary direction. it can. Therefore, it is possible to ensure water tightness at a location where the second housing portion 230 and the first housing portion 130 that cover a part of the connector 137 and the cable 50 that are electronic components are connected. Thereby, since it becomes possible to arrange | position the annular member 250 which is a member for identification to the external appearance edge part of the camera head 40, discrimination power can be improved, without forming an unnecessary convex part. Therefore, it is possible to propose a new and improved medical camera device without impairing discrimination.

  Further, according to an embodiment, the annular member 250, the first housing part 130, and the second housing part 230 are in surface contact with the first seal member 270. Thereby, the contact area between each of the annular member 250, the first housing part 130, and the second housing part 230 and the first seal member 270 can be increased. Therefore, even if the liquid enters the periphery of the first seal member 270 and the first seal member 270 is deformed by the force applied to the first seal member 270 from the invaded liquid, the first seal member 270 is deformed. If the deformation amount of the member 270 is equal to or less than the predetermined deformation amount, it is possible to ensure the water tightness of the connection portion between the second housing portion 230 and the first housing portion 130.

  Further, according to an embodiment, the distal end portion of the second housing portion 230 protrudes toward the step portion of the first housing portion 130, and the second outer peripheral surface of the first housing portion 130. And an annular convex portion 231 disposed between the annular member 250 and the inner peripheral surface of the annular member 250, and the first seal member 270 is sandwiched between the step portion of the first housing portion 130 and the annular convex portion 231. The Thereby, the amount by which the annular protrusion 231 is pushed into the first seal member 270 is determined in accordance with the length of the protrusion of the annular protrusion 231. Therefore, considering the size and material of the first seal member 270, the length by which the annular convex portion 231 is pushed into the first seal member 270 is optimized by setting the length that the annular convex portion 231 protrudes. can do.

  In addition, according to an embodiment, the annular convex portion 231 of the second housing portion 230 has a plurality of ribs that are in contact with the second outer peripheral surface of the first housing portion 130 and the inner peripheral surface of the annular member 250. Is provided. Thereby, the space | interval of the 2nd outer peripheral surface of the 1st housing | casing part 130 and the internal peripheral surface of the annular member 250 can be controlled. Therefore, when the first seal member 270 is sandwiched between the second outer peripheral surface of the first housing portion 130 and the inner peripheral surface of the annular member 250, a change in the distribution of force applied to the first seal member 270 is suppressed. can do. Therefore, it is possible to suppress the deformation of the first seal member 270 due to the change in the distance between the second outer peripheral surface of the first housing portion 130 and the inner peripheral surface of the annular member 250.

  In addition, according to an embodiment, the rear end portion of the second casing portion 230 has the first casing portion in the connection direction between the first casing portion 130 and the second casing portion 230. An adjustment member 290 that adjusts the relative position of the second casing 230 with respect to 130 is provided. Therefore, by adjusting the relative position of the second casing 230 with respect to the first casing 130, the amount by which the tip of the second casing 230 is pushed into the first seal member 270 is adjusted. be able to.

  In addition, according to an embodiment, the step portion of the first housing portion 130 has the welded portion 330 on the inner side of the outer peripheral surface of the annular member 250. Thereby, since the welding part 330 is covered with the 2nd housing | casing part 230 located behind the annular member 250 and the annular member 250, it is not exposed outside. Therefore, the degree of freedom in designing the appearance can be improved.

  Moreover, according to an embodiment, each surface of the annular member 250, the first housing part 130, and the second housing part 230 that contacts the first seal member 270 is a smooth surface. Thereby, the adhesiveness between each of the annular member 250, the first housing portion 130, and the second housing portion 230 and the first seal member 270 can be improved. Therefore, it is possible to improve the water tightness of the connection portion between the second casing portion 230 and the first casing portion 130.

  According to an embodiment, the smooth surface is polished. Usually, the value of the surface roughness of the surface of the member can be reduced by polishing the surface of the member. Therefore, the smoothness of the smooth surface can be improved by polishing the smooth surface. Therefore, the adhesion between the first seal member 270 and each of the annular member 250, the first housing portion, and the second housing portion 230 can be further improved.

<5. Conclusion>
As described above, according to the embodiment of the present disclosure, the annular member is sandwiched between the first casing and the second casing. The seal member is fixed by the first housing, the annular member, and the second housing.

  Thereby, the seal member can be clamped in two directions substantially orthogonal to each other. Therefore, when liquid enters the periphery of the seal member, deformation of the seal due to the force applied to the seal member from the entered liquid can be suppressed in an arbitrary direction. Therefore, it is possible to ensure watertightness at a location where the second housing and the first housing that cover a part of the connector portion and the cable that are electronic components are connected. Thereby, since it becomes possible to arrange | position the annular member which is a member for identification to the external appearance edge part of a camera head, discrimination power can be improved, without forming an unnecessary convex part. Therefore, it is possible to propose a new and improved medical camera device without impairing discrimination.

  In the above description, the camera head 40 having the connector 137 that is a connector portion provided on the camera head 40 and to which an external cable 50 is detachably connected at one end has been described. For example, the connector connection shown in FIG. It is also possible to connect the signal line of the external cable 50 directly to the substrate 190 and connect the external cable 50 having no connector part integrally with the camera head 40.

  Further, the example in which the camera head according to the embodiment of the present disclosure is used in the endoscope apparatus has been described above, but the medical camera apparatus including the camera head according to the present disclosure is not limited to the example. For example, the medical camera device according to the present disclosure may be a medical microscope device. The medical microscope apparatus is an observation apparatus used for performing an operation while observing an operation part in an enlarged manner in a surgical operation. The medical microscope apparatus includes an imaging device and an arm device that holds the imaging device and can move and fix the position and posture of the imaging device. The camera head according to the present disclosure can be applied as an imaging apparatus of such a medical microscope apparatus, for example. And the signal transmission part which concerns on this indication can be applied as an arm apparatus of such a medical microscope apparatus, for example. Further, in such a medical microscope apparatus, two camera heads may be held by the arm device.

  The preferred embodiments of the present disclosure have been described in detail above with reference to the accompanying drawings, but the technical scope of the present disclosure is not limited to such examples. It is obvious that a person having ordinary knowledge in the technical field of the present disclosure can come up with various changes or modifications within the scope of the technical idea described in the claims. Of course, it is understood that it belongs to the technical scope of the present disclosure.

  Further, the effects described in the present specification are merely illustrative or exemplary and are not limited. That is, the technology according to the present disclosure can exhibit other effects that are apparent to those skilled in the art from the description of the present specification in addition to or instead of the above effects.

The following configurations also belong to the technical scope of the present disclosure.
(1)
A camera head comprising a first housing for housing an image sensor;
A signal transmission unit including a cable unit connected to the camera head and transmitting at least an image signal from the imaging element; and a cylindrical second housing through which the cable unit is inserted;
An annular member sandwiched between the first casing and the second casing and having an outer peripheral surface for identifying the type of the camera head;
An annular seal member fixed by the first housing, the second housing, and the annular member;
A medical camera device comprising:
(2)
The first casing of the camera head is provided with a first outer peripheral surface and a connection portion to which the cable portion of the signal transmission unit is connected, and a second sectional outer shape is smaller than the first outer peripheral surface. An outer peripheral surface of
The annular member, the seal member, and at least the tip of the second casing are disposed through the second outer peripheral surface of the first casing,
The annular member is sandwiched between a step portion between the first outer peripheral surface and the second outer peripheral surface of the first casing and a tip end portion of the second casing.
The medical camera device according to (1).
(3)
The medical camera device according to (1) or (2), wherein the annular member, the first housing, and the second housing are in surface contact with the seal member.
(4)
The medical device according to any one of (1) to (3), wherein the annular member identifies the camera head by at least one of an appearance color, an appearance shape, and an appearance print. Camera device.
(5)
The tip of the second casing protrudes toward the stepped portion of the first casing and is disposed between the second outer peripheral surface and the inner peripheral surface of the annular member. Convex is provided,
The seal member is sandwiched between the step portion of the first housing and the annular convex portion of the second housing.
The medical camera device according to (2).
(6)
The medical camera device according to (5), wherein the annular protrusion is provided with a plurality of ribs in contact with the second outer peripheral surface and the inner peripheral surface of the annular member.
(7)
The rear end of the second casing adjusts the relative position of the second casing with respect to the first casing in the connection direction between the first casing and the second casing. The medical camera device according to any one of (1) to (6), wherein an adjustment member is provided.
(8)
The adjustment member has a female screw portion that is screwed to a male screw portion provided on an outer peripheral portion of the cable portion, and the adjustment member rotates to adjust the relative position in the connection direction. The medical camera device according to (7) above.
(9)
The medical camera device according to (3), wherein each surface of the annular member, the first housing, and the second housing that is in contact with the seal member is a smooth surface.
(10)
The medical camera device according to (9), wherein a center line average surface roughness Ra of the smooth surface is 1.6 μm or less.

DESCRIPTION OF SYMBOLS 1 Endoscope apparatus 10 Insertion part 20 Light source apparatus 30 Light guide 40 Camera head 50 Cable 51 Male thread part 60 Control apparatus 70 Display apparatus 110 Coupler part 130 1st housing | casing part 131 Front side housing | casing 131A Protrusion part 133 Rear side housing Body 133A Side part 133B Flange part 135 Switch 137 Connector 150 Lens unit 170 Main board 171 Imaging element mounting part 173 Signal processing part 175 Electronic component mounting part 190 Connector connection board 210 Switch connection board 230, 530, 730 Second housing part 231, 701 Annular convex parts 235, 237, 705, 803 Ribs 250, 650, 850 Annular member 251 Annular groove 270 First seal member 290 Adjustment member 291 Female thread part 310 Second seal member 330 Welding part

Claims (9)

A camera head comprising a first housing for housing an image sensor;
A signal transmission unit including a cable unit connected to the camera head and transmitting at least an image signal from the imaging element; and a cylindrical second housing through which the cable unit is inserted;
An annular member sandwiched between the first casing and the second casing and having an outer peripheral surface for identifying the type of the camera head;
An annular seal member fixed by the first housing, the second housing, and the annular member;
Equipped with a,
The annular member, the first housing, and the second housing are in surface contact with the seal member.
Medical camera device. The first casing of the camera head is provided with a first outer peripheral surface and a connection portion to which the cable portion of the signal transmission unit is connected, and a second sectional outer shape is smaller than the first outer peripheral surface. An outer peripheral surface of
The annular member, the seal member, and at least the tip of the second casing are disposed through the second outer peripheral surface of the first casing,
The annular member is sandwiched between a step portion between the first outer peripheral surface and the second outer peripheral surface of the first casing and a tip end portion of the second casing.
The medical camera device according to claim 1.   The medical camera device according to claim 1, wherein the annular member identifies the camera head by at least one of an appearance color, an appearance shape, and an appearance print. The tip of the second casing protrudes toward the stepped portion of the first casing and is disposed between the second outer peripheral surface and the inner peripheral surface of the annular member. Convex is provided,
The seal member is sandwiched between the step portion of the first housing and the annular convex portion of the second housing.
The medical camera device according to claim 2. The medical camera device according to claim 4 , wherein the annular convex portion is provided with a plurality of ribs in contact with the second outer peripheral surface and the inner peripheral surface of the annular member.   The rear end of the second casing adjusts the relative position of the second casing with respect to the first casing in the connection direction between the first casing and the second casing. The medical camera device according to claim 1, wherein an adjustment member is provided. The adjustment member has a female screw portion that is screwed to a male screw portion provided on an outer peripheral portion of the cable portion, and the adjustment member rotates to adjust the relative position in the connection direction. The medical camera device according to claim 6 . The medical camera device according to claim 1 , wherein each surface of the annular member, the first housing, and the second housing that is in contact with the seal member is a smooth surface. The medical camera device according to claim 8 , wherein a center line average surface roughness Ra of the smooth surface is 1.6 μm or less.

Images