JP4624815B2 - Receiver - Google Patents

Description

  The present invention relates to a receiving apparatus that demodulates a radio signal received using an antenna into a baseband signal and acquires transmission information based on the demodulated baseband signal, and in particular, transmits from a capsule endoscope in a subject. The present invention relates to a receiving device that receives a wireless signal to be received using an antenna outside the subject.

  In recent years, swallowable capsule endoscopes have been developed in the field of endoscopes. This capsule endoscope has an imaging function and a wireless communication function. After being swallowed from the patient's mouth for observation inside the body cavity, until it is naturally discharged from the human body, for example, the esophagus, stomach, small intestine It moves in accordance with the peristaltic movement of the internal organs, and so on, and has a function of sequentially imaging.

  While moving inside the body cavity, the image data captured inside the body by the capsule endoscope is sequentially transmitted outside the body by wireless communication and stored in a memory provided in the receiver outside the body or provided in the receiver. The image is displayed on the displayed display. The doctor or nurse can make a diagnosis based on the image displayed on the display based on the image data stored in the memory or the image displayed together with the reception on the display provided in the receiver.

  When storing image data in a memory, the receiver generally disperses and arranges a plurality of antennas for receiving image signals transmitted from the capsule endoscope outside the body, so that there is little reception error of the image signals. To select and receive. For example, in Patent Document 1, the reception switching of a plurality of antennas arranged outside the body is performed, and the position of the capsule endoscope in the body that is the transmission source of the image signal is determined based on the electric field intensity received by each antenna. A receiver to detect is described.

Japanese Patent Laid-Open No. 2003-19111

  By the way, it is possible to select the location and number of antennas to be placed outside the body depending on the application site, and so on, so that the antenna portion of the receiver can be switched according to the use of the capsule endoscope. A receiver may be configured by a unit. In this case, for example, a replaceable wireless unit including an antenna, a radio signal demodulating circuit, and the like, and a receiving body unit including a signal processing portion that can be shared such as a signal processing circuit demodulated by the radio unit can be attached and detached. Thus, the receiver is configured separately.

  On the other hand, patients who have swallowed a capsule endoscope for examination should be able to act freely even after the capsule endoscope has been swallowed and then discharged, by carrying a receiver. Can do. In such a case, if a separate receiver is used, a tensile force is applied to the antenna attached to the patient's external surface due to patient movement such as bending and torsion and torsion, vibration due to walking, etc. There is a problem that the connection between the units is loosened, and noise is increased in an electric signal transmitted between the units, and desired information may not be obtained. In addition, if the power supply is disconnected while the signal transmission connection is still connected among the units, excessive current flows through the unit that is not supplied with power (latch-up phenomenon), causing the electrical circuit to There was a problem of fear of destruction.

  The present invention has been made in view of the above, and is configured such that a patient who has swallowed a capsule endoscope attaches an antenna to an external surface, and a wireless unit and a receiving body unit are detachably connected. Even when carrying the device, it is possible to prevent the connection between the units from being loosened by the tensile force applied to the antenna, and to obtain the desired information reliably, and to destroy the electric circuit due to the latch-up phenomenon etc. An object of the present invention is to provide a receiving apparatus that can prevent the above.

In order to achieve the above object, a receiving apparatus according to the present invention includes a radio unit that demodulates a radio signal received via an antenna into a baseband signal, the radio unit being detachably connected, and the baseband signal And a receiving device that performs processing for obtaining transmission information from at least the wireless unit side, in which the wireless unit has a stronger tensile force of the antenna relative to the receiving body unit. And a movement restriction means for restricting movement in substantially the same direction.

The receiving apparatus according to the present invention includes a radio unit that demodulates a radio signal received via an antenna into a baseband signal, and the radio unit is detachably connected, and at least the radio unit is based on the baseband signal. A receiving apparatus including a receiving main body unit that performs processing for obtaining transmission information from the unit side is characterized in that a direction in which the antenna has a strong tensile force differs from a direction in which the wireless unit is attached to or detached from the receiving main body unit.

In the receiver according to the present invention as set forth in the invention described above, the direction in which the antenna has a strong tensile force is a vertical movement direction when a person wearing the receiver walks.

Also, the receiving apparatus according to the present invention is characterized in that, in the above-mentioned invention, the receiving main unit comprises a connection detecting means for detecting the presence / absence of connection between the radio unit and the receiving main unit .

The receiving apparatus according to the present invention is the above-described invention, wherein the receiving body unit includes a power supply unit that supplies power to the wireless unit, and the connection detecting unit connects the wireless unit and the receiving body unit. And power supply control means for performing control to supply power from the power supply means to the wireless unit.

In the receiver according to the present invention as set forth in the invention described above, the wireless unit or the receiving body unit includes a guide groove that defines an attaching / detaching direction of the wireless unit, and the movement restricting means extends along the guide groove. It is characterized by being provided.

In the receiver according to the present invention as set forth in the invention described above, the movement restricting means is provided on one of the wireless unit or the receiving body unit, and has a stopper pin having a restoring mechanism, and the wireless unit or the receiving body unit. And a locking hole for locking the stopper pin when the wireless unit and the receiving body unit are connected.

In the receiver according to the present invention as set forth in the invention described above, the movement restricting unit makes the attachment / detachment direction of the wireless unit different from a connection direction between the wireless unit and the reception main unit.

In the receiving device according to the present invention , in the above invention, the movement restricting unit is provided with a connection hook provided at one end of a wireless unit, and provided in the receiving body unit, and restricts the insertion / removal direction of the connection hook. A connection guide allowing the wireless unit to rotate in a direction different from the insertion / removal direction around the connection hook by the engagement of the connection hook; and the wireless unit and the wireless unit at a predetermined rotational position of the wireless unit. A connection state with the receiving main body unit is formed, and the other end of the wireless unit and a hook-and-loop fastener that fixes the portion of the receiving main body unit corresponding to the other end are provided.

Further, the receiving device according to the present invention is characterized in that, in the above-mentioned invention , the receiving device further comprises a fixing means for removing the antenna connection position of the wireless unit and fixing the connection state between the wireless unit and the receiving body unit. To do.

  According to the receiving apparatus according to the present invention, when a patient who swallows a capsule endoscope carries an antenna on an external surface and carries a receiving apparatus configured by detachably connecting a wireless unit and a receiving main unit. Even so, the connection between the units can be prevented from being loosened by the tensile force applied to the antenna, and desired information can be reliably obtained, and the destruction of the electric circuit due to the latch-up phenomenon or the like can be prevented. .

  Hereinafter, a wireless in-vivo information acquiring system which is a preferred embodiment of a receiving apparatus according to the present invention will be described with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments. In the description of the drawings, the same parts are denoted by the same reference numerals.

(Embodiment 1)
FIG. 1 is a schematic diagram showing an overall configuration of a wireless in-vivo information acquiring system. This wireless intra-subject information acquisition system uses a capsule endoscope as an example of an intra-subject introduction apparatus. As shown in FIG. 1, the wireless in-vivo information acquiring system is a capsule that is introduced into the body of a subject 1 and images a body cavity image and wirelessly transmits data such as a video signal to the receiving device 2. Type endoscope 3, receiving device 2 that receives in-vivo image data wirelessly transmitted from capsule endoscope 3, and display device 4 that displays an in-vivo image based on a video signal received by receiving device 2 And a portable recording medium 5 for transferring data between the receiving device 2 and the display device 4. The receiving device 2 also includes a wireless unit 2a having a plurality of receiving antennas A1 to An attached to the external surface of the subject 1, and a radio signal received through the plurality of receiving antennas A1 to An. And a receiving body unit 2b that performs processing and the like, and these units are detachably connected via a connector or the like. Each of the receiving antennas A1 to An is provided, for example, in a jacket that can be worn by the subject 1, and the subject 1 wears the receiving antennas A1 to An by wearing this jacket. Also good. In this case, the receiving antennas A1 to An may be detachable from the jacket.

  The display device 4 is for displaying an in-vivo image captured by the capsule endoscope 3, and has a configuration such as a workstation that displays an image based on data obtained by the portable recording medium 5. Have. Specifically, the display device 4 may be configured to directly display an image using a CRT display, a liquid crystal display, or the like, or may be configured to output an image to another medium such as a printer.

  The portable recording medium 5 uses a compact flash (registered trademark) memory or the like, is detachable with respect to the receiving main unit 2b and the display device 4, and can output or record information when being inserted into both. Have Specifically, the portable recording medium 5 is inserted into the receiving body unit 2 b while the capsule endoscope 3 is moving in the body cavity of the subject 1 and transmitted from the capsule endoscope 3. Data is recorded on the portable recording medium 5. Then, after the capsule endoscope 3 is ejected from the subject 1, that is, after imaging of the inside of the subject 1 is finished, the capsule endoscope 3 is taken out from the receiving body unit 2b and inserted into the display device 4 to display the display. Data recorded by the device 4 is read out. By passing data between the receiving body unit 2b and the display device 4 using the portable recording medium 5, it becomes possible for the subject 1 to act freely during imaging in the body cavity, and the display device 4 This also contributes to shortening the data transfer period between the two. It should be noted that the data transfer between the receiving main unit 2b and the display device 4 may be configured to use a wired or wireless connection with the display device 4 using another recording device built in the receiving main unit 2b. .

  Here, the radio unit 2a and the reception main unit 2b will be described with reference to FIG. FIG. 2 is a block diagram illustrating a configuration of the receiving device 2. The radio unit 2a receives the radio signal transmitted from the capsule endoscope 3 and demodulates it into a baseband signal. As shown in FIG. 2, the wireless unit 2a is connected to a selector switch SW that performs connection switching processing for selectively switching any one of the receiving antennas A1 to An, and to a subsequent stage of the selector switch SW. A receiving circuit 11 that amplifies and demodulates radio signals from the receiving antennas A1 to An that are switched and connected by the SW, and a part of the connection detector 18 are provided.

  The receiving body unit 2b receives and processes the baseband signal demodulated by the wireless unit 2a. As shown in FIG. 2, the reception main unit 2 b includes a signal processing circuit 12 and an A / D conversion unit 13 that are connected to the subsequent stage of the reception circuit 11, and a display unit 14 that displays image data processed by the signal processing circuit 12. , A storage unit 15 for storing various information, a power supply switch 17 for turning on / off power supply to the wireless unit, a connection detection unit 18 for detecting presence / absence of connection between the wireless unit 2a and the receiving body unit 2b, and portable information The recording medium 5 includes a control unit C that controls each of these components, and a power supply unit 16 that supplies power to the reception main body unit 2b and the wireless unit 2a. The control unit C includes a switching control unit Ca that performs switching control of the antenna, and a power supply control unit Cb as power supply control means. The power supply control unit Cb instructs the power supply switch 17 to turn on based on the connection detection signal S4 from the connection detection unit 18 that detects that the wireless unit 2a and the reception main unit 2b are connected. Is output from the power supply unit 16 to the wireless unit 2a. The control unit C may display-control the connection state on the display unit 14 including LEDs and the like based on the connection detection signal S4 sent from the connection detection unit 18. For example, a red LED is turned on in the disconnected state, and a green LED is turned on in the connected state.

  The receiving circuit 11 amplifies the radio signal output from the changeover switch SW, outputs the demodulated baseband signal S1 to the signal processing circuit 12, and outputs a received intensity signal S2 indicating the signal strength of the amplified radio signal to the A / A. The data is output to the D conversion unit 13. The image data processed by the signal processing circuit 12 is stored in the portable information recording medium 5 by the control unit C and displayed on the display unit 14 as necessary. The reception intensity signal S2 converted into a digital signal by the A / D conversion unit 13 is taken into the control unit C. The switching control unit Ca receives the receiving antenna received at the highest signal strength based on the received strength signal S2 obtained by sequentially switching the receiving antennas A1 to An, and receives the image data. And a switching signal S3 instructing switching to the antenna is output to the selector switch SW. Further, the control unit C stores the signal strength received by each receiving antenna together with the image data in the portable information recording medium 5 in association with the selected receiving antenna. The stored signal strength of each receiving antenna is information for calculating the position of the capsule endoscope 3 in the body when the image data is received.

  As shown in FIG. 3, the connection detection unit 18 includes a connector 18a included in the wireless unit 2a and a detection circuit 18b included in the reception main unit. The connector 18a and the detection circuit 18b are connection points between the units. The contacts CON1 and CON2 are connected. In the connector 18a, the contacts CON1 and CON2 are short-circuited. In the detection circuit 18b, the contact CON2 is grounded, and the contact CON1 is connected to the constant voltage source VDD via the resistor R. When the connector 18a and the detection circuit 18b are connected, since the constant voltage source VDD is grounded via the contacts CON1 and CON2, the connection detection signal S4 is not output and the connector 18a and the detection circuit 18b are connected. If not, the voltage signal from the constant voltage source VDD is output to the control unit C as the connection detection signal S4. The controller C determines whether or not the connector 18a and the detection circuit 18b are connected by detecting the presence / absence of the connection detection signal S4, which is a voltage signal, and also determines whether the wireless unit 2a and the reception main unit 2b are connected. The presence or absence of connection can be determined. Further, in this receiving apparatus 2, the contacts CON1 and CON2 are provided in a connector common to the signal line for transmitting the baseband signal S1, the received intensity signal S2 and the switching signal S3, and the power supply line from the power supply unit 16. Therefore, the control unit C can detect the presence / absence of connection of all signal lines and power supply lines between the radio unit 2a and the reception main unit 2b based on the detection result of the connection detection unit 18.

  Here, with reference to FIG. 4, the external configuration of the receiving device 2 will be described in detail. FIG. 4 is a perspective view showing the overall configuration of the receiving device 2 in a state where the wireless unit 2a and the receiving main unit 2b are separated. As shown in FIG. 4, the receiving device 2 includes a wireless unit 2a that is attached and detached in the vertical direction and a receiving body unit 2b. The receiving body unit 2b has a connector 21 at the center of the two surfaces facing the wireless unit 2a that face in the vertical direction, and connection guides 22a and 22b at the left and right ends of the surface facing in the front-rear direction. And a stopper release button 24 on the side surface of the connection guide 22a. On the other hand, when the wireless unit 2a is connected to the receiving antennas A1 to An on the upper surface portion and has guide insertion grooves 23a and 23b on the left and right side surfaces, and further connected to the receiving body unit 2b, the connection guide A movement restricting hole 25 is provided in the surface of the guide contact surface 26 facing the inner surface of 22a. The connector 21 is fitted with a connector (not shown) included in the wireless unit 2a, and connects all corresponding signal lines and power supply lines between the wireless unit 2a and the receiving body unit 2b. The connection guides 22a and 22b have guide surfaces parallel to the attaching / detaching direction H1 of the wireless unit 2a with respect to the receiving body unit 2b, and when the wireless unit 2a is connected to the receiving body unit 2b, the corresponding guide insertion grooves 23a and 23b. The movement direction of the wireless unit 2a is limited to the attaching / detaching direction H1 and the movement of the wireless unit 2a in a direction other than the attaching / detaching direction H1 is restricted after the wireless unit 2a is connected. The stopper release button 24 releases the restriction function of the stopper 27 that restricts the movement of the wireless unit 2a in the attaching / detaching direction H1 when the button is pushed.

  Here, the configuration of the stopper 27 will be described with reference to FIG. FIG. 5 is a cross-sectional view showing the stopper 27 and each part of the connection guide 22a and the wireless unit 2a in the cross section including the center of the stopper release button 24 and parallel to the attaching / detaching direction H1. As shown in FIG. 5, the stopper 27 is fixed to the internal space of the connection guide 22a by a rotating shaft 27a and a torsion spring (not shown). This torsion spring rotates the stopper 27 clockwise with a predetermined force about the rotation shaft 27a, and this rotation is limited by a push pin 24a arranged in contact with the left side surface of the lower end portion of the stopper 27. The push-in pin 24a is attached to the stopper release button 24 together with the coil spring 24b, and is fixed to the connection guide 22a. The initial position of rotation of the stopper 27 is defined by the balance of force between the coil spring 24b and the torsion spring.

  On the other hand, a triangular protrusion 27b is formed on the upper end of the stopper 27 so that the inclined surface faces upward, and a part of the right tip of the stopper 27 is in the initial position when the stopper 27 is in the initial position. Protrude from. In this state, when the wireless unit 2a is attached from above, the protrusion 27b is pushed into the connection guide 22a by the housing of the wireless unit 2a. When the wireless unit 2a is connected to the receiving body unit 2b, the movement restriction hole 25 is at a position corresponding to the protrusion 27b, and the stopper 27 returns to the initial position. At this time, even if the wireless unit 2a moves in the removal direction, the bottom surface of the protrusion 27b is caught by the lower surface of the movement restricting hole 25 and restricts this movement. That is, when the wireless unit 2a is connected to the reception main body unit 2b, the stopper 27 restricts the movement of the wireless unit 2a in the attaching / detaching direction H1, which is a direction in which the tensile force of the antennas A1 to An is strong. Thereafter, when the stopper release button 24 is pushed in, the stopper 27 rotates counterclockwise around the rotation shaft 27a, and the protrusion 27b is removed from the movement restriction hole 25, so that the wireless unit 2a can be moved in the removal direction. Become.

  In the receiving apparatus 2 according to the first embodiment described above, the wireless unit 2a and the receiving main unit 2b are detachably connected, and the connection guides 22a and 22b correspond to the guide insertion grooves 23a and 23b at the time of this connection. The movement direction of the wireless unit 2a is limited to the attachment / detachment direction H1 by being fitted to each other, and the movement of the wireless unit 2a in a direction other than the attachment / detachment direction H1 is restricted after both units are connected, and the stopper 27 restricts the movement of the wireless unit 2a in the attaching / detaching direction H1, which is the direction in which the tensile force of the antennas A1 to An is strong, so that the patient who swallows the capsule endoscope attaches the antenna to the external surface and receives the receiving device 2 When carrying the unit, it is possible to prevent the connection between the units from being loosened by the tensile force applied to the antennas A1 to An, and to ensure the desired information. It is possible to obtain. Furthermore, in the receiving device 2, the power supply control unit Cb uses the power supply switch based on the connection detection signal S4 from the connection detecting unit 18 that detects that the wireless unit 2a and the receiving body unit 2b are connected. In order to perform control to supply power from the power supply unit 16 to the wireless unit 2a by outputting the instruction signal S5 to turn on 17, even if the connection of the power supply line is disconnected due to the tensile force applied to the antenna, the latch It is possible to prevent the electric circuit from being broken due to the up phenomenon.

  In the receiving device 2, the stopper 27, the stopper release button 24, and the movement restriction hole 25 are provided on one side surface, but may be provided on both side surfaces. By providing on both side surfaces, the movement of the wireless unit 2a in the attaching / detaching direction H1 can be more reliably and firmly restricted.

(Embodiment 2)
Next, a second embodiment of the present invention will be described. In the first embodiment described above, the direction in which the tensile force applied to the receiving antennas A1 to An connected to the upper surface portion of the wireless unit 2a is strong and the attaching / detaching direction H1 of the unit are parallel, and the wireless unit 2a in this direction However, in the second embodiment, the direction in which the tensile force is strong and the attaching / detaching direction are orthogonal to each other, and the movement of the wireless unit due to the antenna pulling force is restricted by the connection guide. I am doing so.

  FIG. 6 is a perspective view showing an external configuration of the receiving device according to the second exemplary embodiment of the present invention in a state where the wireless unit and the receiving main unit are separated. As shown in FIG. 6, the receiving apparatus 102 according to the second embodiment includes a radio unit 102a and a receiving body unit 102b that are attached and detached in the left-right direction. The receiving body unit 102b has a connector 21 at the center of the surface facing the side surface of the wireless unit 102a, a U-shaped connection guide 122 on the top surface, and a surface facing the bottom surface of the wireless unit 102a. A stopper 127 is provided, and a stopper release button 124 is provided on the left side surface. On the other hand, the wireless unit 102 a has a guide fitting block 123 on the upper surface portion, and the receiving antennas A <b> 1 to An are connected to the upper surface portion of the guide fitting block 123. The connection guide 122 has a guide surface which is an inner surface parallel to the attaching / detaching direction H2 of the wireless unit 102a with respect to the receiving main body unit 102b. When the wireless unit 102a is connected to the receiving main body unit 102b, the guide fitting block 123 is After the guide contact surface 126 and the guide surface of the connection guide 122 are fitted into the connection guide 122 in parallel, the movable direction of the wireless unit 102a is limited to the attaching / detaching direction H2, and after the wireless unit 102a is connected, The movement of the wireless unit 102a in a direction other than the attaching / detaching direction H2 is restricted. In particular, the connection guide 122 can limit the movement of the wireless unit 102a in the vertical direction, which is the direction in which the tensile force of the antennas A1 to An is strong. The stopper 127 and the stopper release button 124 are the same as the stopper 27 and the stopper release button 24 according to the first embodiment. When the wireless unit 102a is connected to the reception body unit 102b, the stopper 127 The movement of the wireless unit 102a is restricted, and the stopper release button 124 releases the restriction function of the stopper 127 when the button is pushed. The wireless unit 102a has a movement restriction hole (not shown) on the bottom surface to which the stopper 127 is fitted.

  In the receiving apparatus 102 according to the second embodiment, the direction in which the tensile force of the antennas A1 to An is strong is orthogonal to the attaching / detaching direction H2, and the movement of the wireless unit 102a by the tensile force of the antennas A1 to An is performed by the connection guide 122. By limiting, it is possible to prevent the connection between the units from being loosened and to obtain desired information with certainty. The internal electrical configuration of the receiving apparatus 102 is the same as that of the receiving apparatus 2 according to the first embodiment, and has electrically equivalent functions and effects.

  Note that the receiving device 201 is configured so that the direction in which the tensile force of the antennas A1 to An is strong and the attachment / detachment direction H2 are orthogonal to each other, but it is not necessarily orthogonal, and the direction in which the antenna has a strong tensile force and the attachment / detachment direction are different. What is necessary is just to comprise so that it may differ. However, it is preferable to configure in directions orthogonal as much as possible.

(Embodiment 3)
Next, a third embodiment of the present invention will be described. In Embodiments 1 and 2 described above, the movement of the wireless unit relative to the receiving main body unit is limited by the connection guide and the stopper. In Embodiment 3, the movement is limited only by the stopper. Yes.

  FIG. 7 is a plan view showing the overall configuration of the receiving apparatus according to the third embodiment of the present invention, and a part of the cross-sectional views are overlapped. As shown in FIG. 7, the receiving apparatus 202 according to the third embodiment includes a radio unit 202a and a receiving body unit 202b that are divided in the vertical direction and attached and detached. The receiving body unit 202b has a connector 21 at the center of the upper surface facing the radio unit 202a, and has movement restriction holes 225 at the left and right ends of the upper surface. On the other hand, the wireless unit 202a has a connector at the center of the bottom surface, has stoppers 27 at the left and right end portions of the bottom surface, has stopper release buttons 24 at the left and right side portions, and has a receiving antenna A1 on the top surface portion. ~ An are connected. When the wireless unit 202a and the receiving body unit 202b are connected, the stopper 27 enters the movement restriction hole 225. Therefore, even when the wireless unit 202a moves in the removal direction, the stopper 27 restricts movement of the protrusion 27b. It catches on the ceiling surface of the hole 225 and restricts this movement. This restriction is released by pushing the stopper release button 24.

  In the receiving apparatus 202 according to the third embodiment, the direction in which the tensile force of the antennas A1 to An is strong and the direction in which the unit is attached and detached are parallel to each other, and the connection between the units is established in this direction by the stopper 27 and the movement restriction hole 225. It is possible to prevent the information from being loosened and to obtain desired information with certainty. The internal electrical configuration of the receiving apparatus 202 is the same as that of the receiving apparatus 2 according to the first embodiment, and has electrically equivalent functions and effects.

(Embodiment 4)
Next, a fourth embodiment of the present invention will be described. In Embodiments 1 and 2 described above, the connection guide parallel to the attaching / detaching direction of the wireless unit and the receiving body unit is provided. However, in Embodiment 4, the attaching / detaching direction and the direction of the connecting guide are made different. I have to.

  FIGS. 8-1 and FIGS. 8-2 are perspective views showing the external configuration of the receiving apparatus according to the fourth embodiment of the present invention in a state where the radio unit and the receiving main unit are separated. FIG. 8A illustrates a configuration viewed from the left front side, and FIG. 8B illustrates a configuration viewed from the right front side. As shown in these drawings, the receiving apparatus 302 according to the fourth embodiment includes a radio unit 302a and a receiving main unit 302b that are attached and detached in the front-rear direction. As shown in FIG. 8-2, the receiving main unit 302b has a connector 21 at the right end of the vertical surface facing the radio unit 302a, a connection guide 322 at the left end, and a movement limiting tape fixing member 327b at the right side. Have. On the other hand, as shown in FIG. 8A, the wireless unit 302a has reception antennas A1 to An connected to the upper surface portion, and has a connection hook 323 at the lower left end portion of the surface facing the reception main body unit 302b. As shown in FIG. 8-2, a movement restricting tape 327a is provided on the right side surface portion. The movement restriction tape 327a and the movement restriction tape fixing member 327b are realized, for example, by hook and loop members of a hook-and-loop fastener, and can be detachably coupled, and the wireless unit 302a and the reception main body unit 302b are connected. In this case, the movement limiting tape 327a and the movement limiting tape fixing member 327b can be coupled to limit the movement of the wireless unit 302a in the attaching / detaching direction H4. The connection hook 323 can restrict the movement of the wireless unit 302a in the front-rear direction by inserting a hook-like tip portion into the connection guide 322 and being hooked on the inner surface.

  Here, with reference to FIGS. 9-1 to 9-3, a method of connecting the wireless unit 302a and the receiving main unit 302b will be described. FIGS. 9-1 and 9-2 are front views showing the wireless unit 302a and the receiving main unit 302b, and FIG. 9-3 is a partial cross-sectional view taken along the line AA. As shown in FIG. 9A, first, the wireless unit 302a is rotated 90 degrees to the left so that the tip of the connection hook 323 is directed vertically, and in this state, the connection hook 323 is inserted into the connection guide 322. . Next, as shown in FIG. 9-2, the wireless unit 302a is rotated 90 degrees to the right so that the tip of the connection hook 323 faces in the left-right direction, and as shown in FIG. The tip of the connection hook 323 is hooked inside. Thereafter, the wireless unit 302a is slid downward along the connection guide 322, and after the connector 21 is connected, the wireless unit 302a is fixed by the movement limiting tape 327a and the movement limiting tape fixing member 327b.

  In the receiving apparatus 302 according to the fourth embodiment, the direction in which the tensile force of the antennas A1 to An is strong and the attaching / detaching direction H4 are substantially orthogonal to each other, and the movement limiting tapes 327a and 327b, which are simple movement limiting means, By restricting the movement of the wireless unit 302a in the connection direction by the connection hook 323 hooked on the connection guide 322 different from the attachment / detachment direction, it is possible to prevent the connection between the units from being loosened and to obtain desired information reliably. Can do. The internal electrical configuration of the receiving apparatus 302 is the same as that of the receiving apparatus 2 according to the first embodiment, and has electrically equivalent functions and effects.

(Embodiment 5)
Next, a fifth embodiment of the present invention will be described. In the first to fourth embodiments described above, at least one guide or stopper, which is a mechanical limiting device, is used as the wireless unit movement limiting device. However, in the fifth embodiment, the antennas A1 to An are pulled. The direction in which the force is strong and the attaching / detaching direction are substantially orthogonal to each other, and the movement of the wireless unit is limited only by simple fixing means such as a band and a belt.

  FIG. 10 is a perspective view showing an external configuration of a receiving apparatus according to the fifth embodiment of the present invention. A receiving device 402 shown in FIG. 10 includes a wireless unit 402a and a receiving main unit 402b, and fixes the wireless unit 402a with a movement restriction band 427a having one end connected to the upper surface of the receiving main unit 402b. The movement limiting band 427a fixes the wireless unit 402a by covering the front surface of the wireless unit 402a in the vertical direction and fixing the free end to the movement limiting band fixing member 427b provided on the front surface of the receiving body unit 402b. The movement of the wireless unit 402a in the front-rear and up-down directions is restricted. In this case, the connector for connecting the units may be provided on any of the two surfaces where the radio unit 402a and the receiving main unit 402b face each other.

  FIG. 11 is a perspective view of another example of the receiving apparatus according to the fifth embodiment. A receiving apparatus 502 shown in FIG. 11 includes a wireless unit 502a and a receiving body unit 502b, and each unit is fixed integrally by an independent movement limiting belt 527a and a movement limiting belt fixing member 527b that are not connected to either unit. The movement of the wireless unit 502a in the front-rear direction is restricted. In this case, a connector for connecting the units may be provided on a surface where the wireless unit 502a and the receiving main body unit 502b face each other in the front-rear direction.

  The movement restriction means such as the movement restriction band 427a and the movement restriction belt 527a is preferably a band-like band or belt having a width corresponding to the width or height of the wireless unit to be fixed. Also good. Furthermore, the material such as the band and the belt preferably has elasticity.

  In the receiving devices 402 and 502 according to the fifth embodiment, the direction in which the tensile force of the antennas A1 to An is strong and the attaching / detaching direction are orthogonal to each other, and the connecting direction of the wireless unit is set by simple fixing means such as a band or a belt. By restricting the movement, the connection between the units can be prevented from being loosened, and desired information can be obtained with certainty. The internal electrical configuration of the receiving apparatuses 402 and 502 is the same as that of the receiving apparatus 2 according to the first embodiment, and has electrically equivalent functions and effects.

It is a schematic diagram which shows the whole structure of the radio | wireless type in-vivo information acquisition system concerning Embodiment 1 of this invention. It is a block diagram which shows the structure of the receiver shown in FIG. It is a figure which shows the circuit structure of the connection detection means shown in FIG. It is a perspective view which shows the external appearance structure of the receiver shown in FIG. FIG. 6 is a cross-sectional view illustrating a partial cross-sectional configuration of the receiving device illustrated in FIG. 5. It is a perspective view which shows the external appearance structure of the receiver concerning Embodiment 2 of this invention. It is a top view which shows the external appearance structure of the receiver concerning Embodiment 3 of this invention. It is a perspective view which shows the external appearance structure of the receiver concerning Embodiment 4 of this invention. It is a perspective view which shows the external appearance structure of the receiver concerning Embodiment 4 of this invention. It is a top view explaining the connection direction of the radio | wireless unit shown in FIG. 8-1, and a receiving unit. It is a top view explaining the connection direction of the radio | wireless unit shown in FIG. 8-1, and a receiving unit. It is sectional drawing explaining the connection direction of the radio | wireless unit shown in FIG. 8-1, and a receiving unit. It is a perspective view which shows the external appearance structure of an example of the receiver concerning Embodiment 5 of this invention. It is a perspective view which shows the external appearance structure of the other example of the receiver concerning Embodiment 5 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Subject 2,102,202,302,402,502 Receiver 2a, 102a, 202a, 302a, 402a, 502a Radio | wireless unit 2b, 102b, 202b, 302b, 402b, 502b Reception main body unit 3 Capsule type endoscope 4 Display device 5 Portable recording medium 11 Reception circuit 12 Signal processing circuit 13 A / D conversion unit 14 Display unit 15 Storage unit 16 Power supply unit 17 Power supply switch 18 Connection detection unit 18a Connector 18b Detection circuit 21 Connector 22a, 22b, 122 , 322 Connection guide 23a, 23b Guide insertion groove 24, 124 Stopper release button 25, 225 Movement restriction hole 26, 126 Guide contact surface 27, 127 Stopper 123 Guide fitting block 323 Connection hook 327a Movement restriction tape 327b Movement Restriction tape fixing member 427a Movement restriction band 427b Movement restriction band fixing member 527a Movement restriction belt 527b Movement restriction belt fixing member A1 to An Reception antenna C control unit Ca switching control unit Cb power supply control unit CON1, CON2 contact SW switch SW Constant voltage power supply

Claims (10)

A radio unit that demodulates a radio signal received via an antenna into a baseband signal, and a process in which the radio unit is detachably connected and obtains transmission information from at least the radio unit side based on the baseband signal In a receiving device comprising a receiving main body unit to perform,
Movement restriction means for restricting movement of the wireless unit in a direction substantially the same as a direction in which the antenna has a strong tensile force relative to the receiving body unit;
Connection detecting means for detecting the presence or absence of connection between the wireless unit and the receiving main unit;
A receiving apparatus comprising: A radio unit that demodulates a radio signal received via an antenna into a baseband signal, and a process in which the radio unit is detachably connected and obtains transmission information from at least the radio unit side based on the baseband signal In a receiving device comprising a receiving main body unit to perform,
The receiving apparatus according to claim 1, wherein a direction in which the antenna has a strong tensile force differs from a direction in which the wireless unit is attached to or detached from the receiving body unit.   The receiving apparatus according to claim 1, wherein the direction in which the antenna has a strong tensile force is a vertical movement direction when a person wearing the receiving apparatus walks. The receiving apparatus according to claim 2 , wherein the receiving body unit includes a connection detection unit that detects whether or not the wireless unit and the receiving body unit are connected. The receiving main unit is:
Power supply means for supplying power to the wireless unit;
Power supply control means for performing control to supply power from the power supply means to the wireless unit when the connection detection means detects a connection between the wireless unit and the reception main unit;
The receiving device according to claim 1, further comprising: The wireless unit or the receiving body unit includes a guide groove that defines a mounting / demounting direction of the wireless unit,
The receiving apparatus according to claim 1 , wherein the movement restricting unit is provided along the guide groove. The movement restriction means includes
A stopper pin provided on one of the wireless unit or the receiving body unit and having a restoring mechanism;
A locking hole that is provided on the other of the wireless unit or the receiving body unit, and that the stopper pin is locked when the wireless unit and the receiving body unit are connected,
The receiving apparatus according to claim 1, further comprising: The movement restriction means includes
The receiving apparatus according to claim 1 , wherein a direction in which the wireless unit is attached and detached is different from a connection direction between the wireless unit and the receiving main unit. The movement restriction means includes
A connection hook provided at one end of the wireless unit;
A connection provided on the receiving body unit, restricting the insertion / removal direction of the connection hook, and allowing the wireless unit to rotate in a direction different from the insertion / removal direction around the connection hook by engagement of the connection hook. A guide,
A connection state between the wireless unit and the receiving body unit is formed at a predetermined rotation position of the wireless unit, and the connection state is fixed to the other end of the wireless unit and the portion of the receiving body unit corresponding to the other end. A hook-and-loop fastener,
The receiving apparatus according to claim 8, further comprising:   The receiving device according to claim 8, further comprising a fixing unit that removes an antenna connection position of the wireless unit and fixes a connection state between the wireless unit and the receiving main unit.

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