JP2009039433A - Signal transmission member, and image pickup device and endoscope using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal transmission member suitable for miniaturization and achieving the excellent shielding property. <P>SOLUTION: A first FPC (flexible print circuit board) 3 and a second FPC 4 are connected to an image sensor 1 in such a way that a beta GND 3d and a beta GND 4c turn outward. After the connection, the first and second FPCs start bending along bending lines 3e and 4e so that the beta GND 3d and the beta GND 4d turn outward, then the first and second FPCs are spirally wound to form a cylinder. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a signal transmission member, and more particularly to a signal transmission member that transmits a signal to an imaging apparatus.

  In a conventional imaging device, for example, a signal cable is connected to a land provided on a circuit board connected to an image sensor.

  However, in such a conventional imaging device, if the circuit board is further reduced in size, lands for the number of cables cannot be secured, and this may hinder downsizing.

Therefore, as an example in which a cable is not used, there has been a technique in which an FPC (flexible printed circuit board) is spirally wound and used as a signal transmission member as disclosed in, for example, Japanese Patent Application Laid-Open No. 2004-16725 (Patent Document 1).
JP 2004-16725 A

  However, in general, there is a problem that it is difficult for FPC to secure a shielding property like a coaxial cable.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a signal transmission member suitable for downsizing and capable of realizing excellent shielding properties.

The signal transmission member of the present invention is
A first flexible printed circuit board having a first belt-like long belt-like region in which a first signal line pattern is printed on one surface side and a GND surface pattern is printed on the other surface side;
A second flexible printed circuit board having a long strip-like second strip-shaped region in which a second signal line pattern is printed on one surface side and a GND planar pattern is printed on the other surface side; Prepared,
The first flexible printed circuit board forms a first cylindrical portion that is three-dimensionally formed by winding it spirally with the surface on which the GND planar pattern is printed facing outward.
The second flexible printed circuit board forms a second cylindrical portion that is three-dimensionally formed by winding it spirally with the surface on which the GND planar pattern is printed facing outward.
The first cylindrical part is configured to be disposed inside the second cylindrical part.

  According to the present invention, there is an effect that it is suitable for downsizing and an excellent shielding property can be realized.

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

  1 to 8 relate to a first embodiment of the present invention, FIG. 1 is an overall view showing a configuration of an electronic endoscope, FIG. 2 is a view showing a front end cross section of the electronic endoscope of FIG. 1, and FIG. 4 is a side view showing the configuration of the main part of the image pickup unit 2, FIG. 4 is a first development view of the first FPC in FIG. 3, and FIG. 5 is a second development view of the first FPC in FIG. Is a first development view of the second FPC of FIG. 3, and FIG. 7 is a second development view of the second FPC of FIG.

  As shown in FIG. 1, an electronic endoscope 20 includes an operation unit 21 that performs various operations, an elongated and soft insertion portion 22 that extends from the operation unit 21, an operation unit 21, and a light source unit (not shown). , And a scope connector 26 that is connected to a light source unit (not shown) is provided at the base end of the universal cord 25.

  A bending portion 23 that can be bent by a bending operation at the operation portion 21 is provided on the distal end side of the flexible insertion portion 22. An electronic component such as an image sensor, which will be described later, is provided inside the distal end portion 24 provided at the distal end of the bending portion 23.

  Further, the scope connector 26 is provided with an electrical contact 27 for connection to a video processor (not shown) for signal processing the image signal picked up by the image sensor.

  Next, the distal end portion 24 of the electronic endoscope 20 will be described with reference to FIG. As shown in FIG. 2, the distal end portion 24 is provided with a distal end main body portion 17 having a cylindrical outer shape having a plurality of metal through-holes, and a resin distal end cover 18 is fixed so as to cover the distal end surface. Has been.

  In addition to fixing the imaging unit 10 to the through hole of the distal end main body portion 17, a forceps channel 19, a nozzle / pipe / tube for an air / water supply channel (not shown), or an illumination lens or fiber bundle is fixed. The

  A curved tube 23a is fixed to the rear end side of the distal end main body portion 17, and a curved rubber 23b is attached to the outer peripheral portion of the distal end main body portion 17 and the curved tube 23a.

  The imaging unit 10 includes an objective lens unit 11 including a plurality of lenses and a lens frame, an image sensor 1, a plurality of FPCs (flexible printed circuit boards), and the like.

  A main configuration around the image sensor 1 will be described with reference to FIG. As shown in FIG. 3, the image sensor 1 has a rectangular image area 1a on one surface, and terminal rows 1b and 1c on upper and lower ends thereof.

  A cover glass 2 is fixed to the image area 1 a via a UV adhesive 8. A first FPC 3 is bonded to the upper terminal row 1 b and a second FPC 4 is bonded to the lower terminal row 1 c via bumps 9. The bonding part is sealed with a sealant 7.

  The first FPC 3 and the second FPC 4 are both long double-sided wiring boards as shown in FIGS.

  That is, as shown in FIGS. 4 and 5, the first FPC 3 has a substantially strip shape as a whole, and has an outer shape that is inclined by 45 ° only at the tip portion. The tip portion is provided with a copper inner lead 3g protruding from the end of the polyimide substrate 3i.

  On one side of the first FPC 3, as shown in FIG. 4, conductor patterns (connected to the inner leads 3g) for the vertical transfer drive 3a, the horizontal transfer drive 3b and the GND 3c, which are signals for driving the image sensor, are provided. Yes.

  Further, as shown in FIG. 5, the back surface of the first FPC 3 is a solid GND 3d, which is a planar printed GND surface pattern (hereinafter referred to as a solid GND) that is coupled to the GND 3c through the through hole 3h. Only is provided on the entire surface.

  Furthermore, a pad 3f is provided at the rear end of the first FPC 3 so as to be connected to the electrical connector.

  As shown in FIGS. 6 and 7, the second FPC 4 has substantially the same outer shape as the first FPC 3.

  That is, as shown in FIG. 6, only one solid GND 4d is provided on one side of the second FPC 4 as in the first FPC 3 (FIG. 5).

  Further, as shown in FIG. 7, electronic components such as a transistor 5 and a capacitor 6 are mounted on the back surface of the second FPC 4, and a conductor pattern for a power source 4a, a video output 4b, and a GND 4c is provided.

  Returning to FIG. 3, the description will be continued. The first FPC 3 and the second FPC 4 are connected to the image sensor 1 such that the solid GND 3 d and the solid GND 4 d face outward.

  After the connection, the bending line 3e and the bending line 4e begin to bend so that the solid GND 3d and the solid GND 4d face outward, and are wound spirally to form a cylinder.

  By arranging the bending line 3e and the bending line 4e in the same direction, the winding direction is also opposite.

  First, the second FPC 4 is wound clockwise to form a cylindrical shape when viewed from the rear, and then the first FPC 3 is wound counterclockwise along the outer periphery when viewed from the rear. In addition, it is preferable that the outer peripheral portion is formed so as to expose only the solid GND 3d and the solid GND 4d by winding while adhering the side surfaces without gaps or by overlapping partly.

  Returning to FIG. 2, the description will be continued. A centering glass 12 is bonded and fixed to the front surface of the cover glass 2 with a UV adhesive 8 while being centered with respect to the image area 1 a of the image sensor 1.

  A metal lens frame 13 is fitted and fixed to the glass 12, and a metal shield frame 14 is provided so as to cover the transistor 5 and the capacitor 6 on the tip side of the first FPC 3 and the second FPC 4 from the lens frame 13. Is placed and fixedly fitted to the lens frame 13.

  The shield frame 14 is filled with an adhesive 16 and the rear end portion of the shield frame 14 is fixed to the first FPC 3 with a heat shrinkable tube 15.

  The imaging unit 10 is completed by fitting the objective lens unit 11 to the lens frame 13 and adjusting the focus to an appropriate position while moving the objective lens unit 11 back and forth, and fixing both with an adhesive.

  As described above, in this embodiment, since the FPC is directly used as a signal transmission member without using a cable, cable soldering at the tip is not necessary and workability is improved. In addition, miniaturization can be realized because no soldering space is required.

  Furthermore, reliability is improved because no heat or mechanical stress is applied during soldering.

  Further, since the FPC is spirally wound and formed into a cylindrical shape, the mechanical (mechanical) resistance against bending and twisting of the endoscope insertion portion or the like is ensured as well as the cable. Since it is formed in a double cylindrical shape, the mechanical strength is also improved.

  Further, since the signal line on the FPC is completely covered with the solid GND on the back surface over the entire length, the shielding performance is improved as compared with the normal FPC.

  In addition, regarding the video output, since the pattern is arranged on the inner peripheral surface of the inner FPC so that a double shield is secured by two solid GNDs, noise from the outside can be firmly cut. Similarly, electronic components such as transistors are also arranged on the innermost side of the FPC, so that a double shield is secured.

  Furthermore, by reversing the winding direction, it is possible to avoid a situation in which the winding interval of the same part is disturbed simultaneously by two FPCs when subjected to bending or twisting load, so that a stable shielding property can be obtained. can get.

  In addition, what is necessary is just to select the optimal conditions according to the objective about the width | variety and thickness of two FPC, a winding direction, a winding pitch, the inner / outer diameter of a cylindrical part, and the space between two cylinders. In addition, there is no problem even if the cylindrical part is triple or quadruple, for example, it is possible to cope with the increase in the number of signal lines and to further improve the shielding property by making it triple (multilayer) like triple or quadruple. Is also possible.

  Here, when it is necessary to drive at a higher frequency, only the conductive pattern of the high frequency drive is arranged on the inner FPC, and other conductive patterns of the low frequency driving signal, the power source, and the video output signal are arranged on the outer FPC. May be.

  When digital signals and analog signals are mixed, the mounting components and conductive patterns may be allocated to the two FPCs, for example, the digital signals may be arranged on the inside and the analog signals may be arranged on the outside.

  8 to 13 relate to the second embodiment of the present invention, FIG. 8 is a side view of the main part of the imaging unit, FIG. 9 is a perspective view of the main part of the imaging unit in FIG. 8, and FIG. 11 is a development view of the first FPC of FIG. 8, FIG. 12 is a development view of the second FPC of FIG. 8, and FIG. 13 is a first bend of the second FPC of FIG. It is a side view of a line.

  Since the second embodiment is almost the same as the first embodiment, only different points will be described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  In the present embodiment, as shown in FIGS. 8 to 10, the image sensor 31 has a rectangular image area 31a on one surface, and two terminal rows 31b and 31c arranged in a row at the lower end thereof. .

  A cover glass 32 is fixed to the image area 31 a via the UV adhesive 8. A first FPC 33 is bonded to the first terminal row 31 b and a second FPC 35 is bonded to the second terminal row 31 c via the bumps 9. The bonding part is sealed with a sealant 40. As shown in FIG. 11, the first FPC 33 is a long double-sided wiring board.

  The first FPC 33 is substantially belt-shaped as a whole and has an outer shape that is inclined only 45 ° at the tip. A conductive pattern for vertical transfer driving at a relatively low frequency is provided on one side. Only the solid GND is provided on the back surface of the first FPC 33, but it is not drawn out to the inner lead, and a pad is provided so as to be connected to the electrical connector only at the rear end portion of the first FPC 33. Yes. The width of the image sensor mounting portion 33a is a width corresponding to the second terminal row 31c, and the signal transmission portion 33b is formed wider than this.

  As shown in FIG. 11, the second FPC 35 has electronic components such as a capacitor 36, a resistor 37, and a transistor 38 mounted on one side of the second FPC 35. Further, the second FPC 35 is relatively near the rear end of the back surface of the second FPC 35. A high-frequency horizontal transfer drive, video output, power supply, and GND cable land 35k are provided.

  The image sensor mounting portion 35a and the bent portion 35b have a width corresponding to the first terminal row 31b. The first electronic component mounting portion 35c on which the capacitor 36 and the resistor 37 are mounted and the second on which the transistor 38 is mounted. The electronic component mounting portion 35d is formed to have substantially the same width as the horizontal width of the image sensor 31.

  The second electronic component mounting portion 35d is disposed so as to extend in a direction perpendicular to the first electronic component mounting portion 35c. The second electronic component mounting portion 35d is folded back to the cable land 35k surface side of the first electronic component mounting portion 35c by a first bending line 35e having an inclination of 45 ° with respect to the width direction, and both are fixed with an adhesive. To do. Rather than providing the first bending line 35e sideways, it is easier to ensure the dimension in the width direction when bent, and the mounting area can be efficiently secured.

  As shown in FIG. 12, the conductor pattern 35i and the insulating cover lay 35h are arranged inside the folding at the first bending line 35e, and the insulating base 35j is formed to be exposed on the outer surface. .

  Thus, even if the FPC is bent, the conductor pattern 35i can be prevented from being exposed due to the crack of the coverlay 35h. Further, since the coverlays 35h face each other when folded, it is possible to ensure insulation.

  Returning to FIGS. 8 to 10, the description will be continued. After the first FPC 33 and the second FPC 35 are connected to the image sensor 31, the inner lead portion is sealed and reinforced with the sealant 40.

  Next, the inner lead portion is bent and the image sensor mounting portion 33a and the image sensor mounting portion 35a are arranged in parallel to the lower end surface of the image sensor 31.

  Subsequently, the bent portion 35 b is bent by the second bending line 35 f so as to be parallel to the back surface of the image sensor 31, and the image sensor 31 and the bent portion 35 b are fixed by the adhesive 39.

  Next, the first electronic component mounting portion 35c is bent at the third bending line 35g so as to be parallel to the image sensor mounting portion 33a and the image sensor mounting portion 35a.

  A composite coaxial cable 34 including a plurality of coaxial cables 34a and electric wires 34b is connected to the cable land 35k.

  The composite coaxial cable 34 is configured by covering an outer periphery obtained by twisting the coaxial cable 34a and the electric wire 34b with a comprehensive shield in which a thin conductor wire is knitted, and further arranging an outer sheath made of an insulator.

  It should be noted that an adhesive is preferably filled between the first FPC 33 and the second FPC 35 and around the connecting portion of the composite coaxial cable 34 for reinforcement.

  A horizontal transfer drive and video output are assigned to the coaxial cable 34a, and a power source and GND are assigned to the electric wire 34b.

  Subsequently, the first FPC 33 is bent at the bending line 33c so that the solid GND faces outward, and the coaxial cable 34a and the signal transmission unit 33b are wound around the outer periphery of the composite coaxial cable 34 in the direction opposite to the twisting direction of the electric wire 34b. I will put it on.

  The signal transmission part 33b is wound around the outer periphery of the composite coaxial cable 34 with the side surfaces thereof being tightly attached, and finally is covered with a long insulating heat-shrinkable tube (not shown) over its entire outer length. Alternatively, a silicon tube may be covered to ensure insulation between the solid GND and the inner peripheral portion of the endoscope or other internal organs.

  As described above, in this embodiment, by using the minimum necessary number of cables, a space for soldering the cable at the tip is not required, so that downsizing can be realized.

  Further, since the cable can be arranged at the center and the FPC can be spirally wound around the cable, the assembly is easy.

  Furthermore, since the signal line having a high frequency is formed of a coaxial line having a high shielding property and is completely covered with the solid GND of the FPC over the entire length thereof, further improvement in the shielding property can be expected.

  By disassembling one terminal row and connecting it to two FPCs, and bending and mounting one FPC, the electronic component mounting area and the cable connection area can be expanded.

  If there are few mounted components, the components may be mounted on one long FPC and a coaxial cable may be connected near the tip.

  Similarly to the first embodiment, a composite cable in which a video output signal is assigned to a coaxial cable and a power supply / GND is assigned to a power supply cable may be arranged inside an FPC in which other drive signals are arranged.

  When digital signals and analog signals are mixed, they may be allocated to coaxial cables and FPCs, for example, digital signals may be arranged on coaxial cables and analog signals may be arranged on FPCs.

  14 and 15 relate to the third embodiment of the present invention, FIG. 14 is a developed view of the FPC, and FIG. 15 is a side view of the main part of the imaging unit including the FPC of FIG.

  Since the third embodiment is almost the same as the first embodiment, only different points will be described, and the same components are denoted by the same reference numerals and description thereof will be omitted.

  In this embodiment, as shown in FIGS. 14 and 15, the FPC 43 is a sheet-like sheet composed of an electronic component mounting portion 43 d on which a capacitor 46 is mounted, a first signal portion 44, and a second signal portion 45. It consists of a flexible printed circuit board.

  The first signal portion 44 and the second signal portion 45 are formed in a strip shape substantially parallel to each other, and the tip portions thereof are connected to the electronic component mounting portion 43d having an angle with respect to the longitudinal direction.

  The first signal section 44 on the mounting surface side of the capacitor 46 is provided with a conductor pattern for low frequency signals, and the second signal section 45 is provided with a conductor pattern for high frequency signals.

  The entire back surface of the electronic component mounting portion 43d, the first signal portion 44, and the second signal portion 45 is provided with a solid GND.

  A fixing portion 44 a is provided so that only the conductor protrudes toward the second signal portion 45 at the rear end portion of the solid GND of the first signal portion 44.

  First, at the first bending line 43a near the rear end of the electronic component mounting portion 43d, the rear end portion is bent toward the image sensor 41, and the second signal portion 45 is spirally wound from the second bending line 43b. . At this time, if the cored bar 48 is inserted in the center, it is easy to wind.

  When the second signal portion 45 has been wound, a Teflon (registered trademark) tube 49 is placed on the outer periphery of the second signal portion 45, and the third bending line 43c provided outside the second bending line 43b along the outer periphery. The first signal unit 44 is spirally wound in the same direction as the second signal unit 45.

  Alternatively, the first signal unit 44 and the second signal unit 45 may be wound around the cored bar 48 at the same time.

  Thereafter, the metal core 48 is pulled out, and the fixing portion 44a is connected and fixed to the solid GND of the second signal portion 45 with solder or the like at the rear end portion.

  Thus, in this embodiment, even with a single FPC, a double shield similar to that in Embodiment 1 can be realized. Therefore, if there is a signal line that needs to be shielded, it can be arranged inside. Good.

  Moreover, if a digital signal and an analog signal are distributed to the divided FPC, mutual interference can be prevented by the solid GND between them.

  Assembly work is facilitated by making the winding directions of the two long portions of the FPC the same. Further, the shape of the FPC can be simplified.

  Needless to say, the shielding properties can be further improved and the mounting density can be increased by combining various constituent elements of the above-described embodiments.

  For example, if the FPC of the third embodiment is used for the first FPC of the first embodiment and a coaxial cable is connected to the second FPC as in the second embodiment, the digital signal and the analog signal are separated. It is also possible to simultaneously enhance the shielding performance of the high-frequency signal for each signal.

  The present invention is not limited to the above-described embodiments, and various changes and modifications can be made without departing from the scope of the present invention.

1 is an overall view showing the configuration of an electronic endoscope according to Embodiment 1 of the present invention. The figure which shows the front-end | tip cross section of the electronic endoscope of FIG. The side view which shows the structure of the principal part of the imaging unit of FIG. First development view of the first FPC of FIG. 2 is a second development view of the first FPC in FIG. First development view of the second FPC of FIG. FIG. 3 is a second development view of the second FPC. The side view of the principal part of the imaging unit which concerns on Example 2 of this invention. The perspective view of the principal part of the imaging unit of FIG. Front view of the main part of the imaging unit of FIG. FIG. 8 is a developed view of the first FPC. FIG. 8 is a development view of the second FPC. Side view of the first bending line of the second FPC of FIG. FIG. 4 is a development view of an FPC according to Embodiment 3 of the present invention. The side view of the principal part of the imaging unit provided with FPC of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Image sensor 1a ... Image area 1b ... Upper terminal row 1c ... Lower terminal row 2 ... Cover glass 3 ... 1st FPC
3a ... Vertical transfer drive 3b ... Horizontal transfer drive 3c ... GND
3d ... Solid GND
3e ... bending line 3f ... pad 3g ... inner lead 3h ... through hole 3i ... base material 4 ... second FPC
4a ... Power supply 4b ... Video output 4c ... GND
4d ... Solid GND
4e ... bending line 4f ... pad 4g ... inner lead 4h ... through hole 4i ... substrate 5 ... transistor 6 ... capacitor 7 ... sealant 8 ... UV adhesive 9 ... bump 10 ... imaging unit 11 ... objective lens unit 12 ... core Outgoing glass 13 ... Lens frame 14 ... Shield frame 15 ... Heat-shrinkable tube 16 ... Adhesive 17 ... Tip body 18 ... Tip cover 19 ... Forceps channel 20 ... Electronic endoscope 21 ... Operation part 22 ... Flexible insertion part 23 ... Curve Part 23a ... Curved tube 23b ... Curved rubber 24 ... Tip part 25 ... Universal cord 26 ... Scope connector 27 ... Electrical contact part 31 ... Image sensor 31a ... Image area 31b ... First terminal row 31c ... Second terminal row 32 ... Cover glass 33 ... 1st FPC
33a ... Image sensor mounting portion 33b ... Signal transmission portion 33c ... Bending line 34 ... Composite coaxial cable 34a ... Coaxial cable 34b ... Electric wire 35 ... Second FPC
35a ... Image sensor mounting portion 35b ... Bending portion 35c ... First electronic component mounting portion 35d ... Second electronic component mounting portion 35e ... First bending line 35f ... Second bending line 35g ... Third bending line 35h ... cover lay 35i ... conductor pattern 35j ... substrate 35k ... cable land 36 ... capacitor 37 ... resistor 38 ... transistor 39 ... adhesive 40 ... sealant 41 ... image sensor 42 ... cover glass 43 ... FPC
43a ... 1st bending line 43b ... 2nd bending line 43c ... 3rd bending line 43d ... Electronic component mounting part 44 ... 1st signal transmission part 44a ... Fixed part 45 ... 2nd signal transmission part 46 ... Capacitor 47 ... Sealant 48 ... Core metal 49 ... Teflon (registered trademark) tube 50 ... Solder

Claims (12)

A first flexible printed circuit board having a first belt-like long belt-like region in which a first signal line pattern is printed on one surface side and a GND surface pattern is printed on the other surface side;
A second flexible printed circuit board having a long strip-like second strip-shaped region in which a second signal line pattern is printed on one surface side and a GND planar pattern is printed on the other surface side; Prepared,
The first flexible printed circuit board forms a first cylindrical portion that is three-dimensionally formed by winding it spirally with the surface on which the GND planar pattern is printed facing outward.
The second flexible printed circuit board forms a second cylindrical portion that is three-dimensionally formed by winding it spirally with the surface on which the GND planar pattern is printed facing outward.
The signal transmission member, wherein the first cylindrical portion is disposed inside the second cylindrical portion. A first elongated band-shaped region in which a first signal line pattern is printed on one surface side and a GND surface pattern is printed on the other surface side;
A long second belt-like region in which a second signal line pattern is printed on one surface side and a GND surface pattern is printed on the other surface side;
A sheet-like flexible printed circuit board having
The first belt-shaped region forms a first cylindrical portion that is three-dimensionally formed in a spiral shape with the surface on which the GND planar pattern is printed facing outward.
The second belt-shaped region forms a second cylindrical portion that is three-dimensionally formed in a spiral shape with the surface on which the GND planar pattern is printed facing outward.
The signal transmission member, wherein the first cylindrical portion is disposed inside the second cylindrical portion. The signal according to claim 1 or 2, wherein a winding direction toward the spiral tip of the first cylindrical part is the same as a winding direction toward the spiral tip of the second cylindrical part. Transmission member. 3. The spiral winding direction toward the tip of the first cylindrical portion is opposite to the spiral winding direction toward the tip of the second cylindrical portion. 4. Signal transmission member. The frequency of the signal that transmits the second signal line pattern of the second cylindrical portion is higher than the frequency of the signal that transmits the first signal line pattern of the first cylindrical portion. The signal transmission member according to any one of claims 1 to 4. One of the signal transmitting the first signal line pattern of the first cylindrical portion and the signal transmitting the second signal line pattern of the second cylindrical portion is a digital signal, and the other The signal transmission member according to claim 1, wherein the signal is an analog signal. 5. The signal transmission member according to claim 1, wherein the second belt-shaped region has a component mounting portion for mounting an electronic component. Comprising a flexible printed circuit board having a signal line pattern printed on one side and a ground plane pattern printed on the other side;
The flexible printed circuit board forms a cylindrical portion that is three-dimensionally formed in a spiral shape with the surface on which the GND planar pattern is printed facing outward.
A signal transmission member, wherein a coaxial signal cable is disposed inside the cylindrical portion. The signal transmission member according to claim 7, wherein a frequency of a signal transmitted through the coaxial signal cable is higher than a frequency of a signal transmitted through the signal line pattern of the first cylindrical portion. 8. The signal transmission according to claim 7, wherein one of the signal transmitted through the signal line pattern and the signal transmitted through the coaxial signal cable is a digital signal and the other signal is an analog signal. Element An image pickup apparatus, wherein the signal transmission member according to any one of claims 1 to 9 is connected to an image sensor to pick up an image of a subject. An endoscope comprising the imaging device according to claim 10.

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