Device and method for assembling in vivo sensing devices

A sleeve for simple assembly of in-vivo devices, such as endoscopy capsules, is provided. The sleeve comprises grippers and leaf springs at either end to hold the rigid portions of a rigid-flex PCB (printed circuit board) in a folded configuration before the PCB is inserted into an in-vivo device's housing. A method of assembly of the rigid-flex PCB into the sleeve is provided.

FIELD OF THE INVENTION

The present invention relates to the field of assembly of in-vivo devices. More specifically the present invention relates to a device and method for assembling an in-vivo sensing device for capsule endoscopy.

BACKGROUND OF THE INVENTION

Many devices, specifically devices that are intended to be inserted in-vivo, may need to maintain a small volume so as to enable free passage through in-vivo ducts. Many in-vivo devices, such as in-vivo endoscopy capsules, contain electronic and electrical components, e.g., image sensors, illumination sources, transmitters, antennas, etc. Typically, such components are supported by and are electrically connected to a printed circuit board (PCB). The PCB on which electronic components are mounted is typically a rigid printed circuit board. In-vivo endoscopy capsules normally comprise numerous electronic components, such that the electronic components are divided between at least two rigid portions. Such rigid portions are typically connected by a flexible portion, i.e., the PCB used in in-vivo devices is a “rigid-flex” PCB.

The rigid-flex PCB is inserted into a device with a predetermined low volume that is compatible with the known size and diameter of in-vivo lumens and ducts into which it is inserted. For example, a swallowable capsule should maintain a low volume compatible with the smallest diameter of the gastrointestinal (GI) tract, such that the capsule can freely pass through the GI tract. In order for the device to maintain a low volume, the rigid-flex PCB needs to be kept within the device in a compact configuration.

During assembly, all the electronic and electrical components are mounted on the rigid-flex PCB prior to the PCB being folded into a compact configuration. Rigid-flex PCBs which are intended to be inserted in endoscopy capsules according to embodiments of the present invention may be similar to embodiments described in International Patent Application Number PCT/IL2005/001380, entitled “In-Vivo Sensing Device With A Circuit Board Having Rigid Sections And Flexible Sections”, filed on Dec. 27, 2005, published on Jul. 6, 2006 as International Patent Application Publication Number WO 2006/070360 and/or in U.S. patent application Ser. No. 10/481,126, entitled “In-Vivo Sensing Device With A Circuit Board Having Rigid Sections And Flexible Sections”, filed on Dec. 18, 2003, published on Sep. 2, 2004 as United States Patent Application Publication Number 2004/0171914, which describes a rigid-flex PCB that is folded and held in its folded configuration through mini-springs or spacers between one rigid portion and another. In this embodiment, the springs/spacers may hold the PCB in its folded configuration by gluing the ends of the rigid portions of the PCB to the ends of the springs/spacers, all of which are hereby incorporated by reference.

However, glue may be difficult to use during assembly, and glue may drip and/or may spread to areas where it is not needed, as well as reach areas where it may cause damage, e.g., cause a cut-off between electrical components on the PCB. During mass production, especially during production of devices of a small scale, e.g., swallowable endoscopy capsules, the use of glue complicates the assembly process, since it is difficult to control the amount of glue used and its polymerization.

There is, therefore, a need for a more simple way of assembly and folding of a rigid-flex PCB into an in-vivo device, while maintaining it in its folded position.

Furthermore, in an event of a short circuit in one of the electrical circuits in an in-vivo device, the batteries inside may over-heat. In order to prevent over-heating of the in-vivo device's housing which may lead to undesirable heating of tissue surrounding the device, there is a need for a mechanism that may distant the batteries from the in-vivo device's housing.

SUMMARY OF THE INVENTION

Embodiments of the present invention provide a device and method for easy and simple assembly and folding of a PCB into an in-vivo device.

In some embodiments of the present invention, an in-vivo device may comprise a sleeve with grippers and leaf springs instead of glue. Such a sleeve may be beneficial in simplifying the assembly process of in-vivo devices. When using a sleeve with grippers and leaf springs instead of springs/spacers connected by glue, as will be described in the invention below, the assembly process of in-vivo devices may be less time-consuming and may acquire less expertise such that it is more cost-effective.

In addition, a sleeve may serve as a barrier between the device's housing and batteries placed inside the device and so may prevent over-heating of the device's housing in the event of a short-circuit which inevitably causes over-heating of the batteries.

According to some embodiments, there is provided a sleeve configured for holding a circuit board in a folded configuration, said circuit board comprising a first rigid portion and a second rigid portion connected by a flexible portion. According to some embodiments, the sleeve may comprise a first end comprising a first gripper and at least two leaf springs, and a second end comprising a second gripper. In some embodiments, the first gripper and the at least two leaf springs are for holding the first rigid portion in between the first gripper and the two leaf springs. In some embodiments, the second gripper is for holding the second rigid portion. In some embodiments, the sleeve may comprise space for inserting at least one battery between the first and the second rigid portions.

In some embodiments, the sleeve may be manufactured from a material selected from: Acetal, ABS, Polycarbonate, and Polyimide. In some embodiments, the sleeve may be inserted into a swallowable capsule's housing. According to some embodiments, the sleeve may comprise a longitudinal opening through which the flexible portion is passed along. In some embodiments, the opening may be for providing space for the flexible portion between the sleeve and the capsule's housing.

According to some embodiments, a method of assembling an in vivo device is provided. In some embodiments, the method may comprise the step of providing a sleeve with two open ends, wherein a first sleeve end comprises a first gripper and at least two leaf springs and a second sleeve end comprises a second gripper. The method may further comprise the steps of providing a circuit board having a first rigid portion and a second rigid portion connected by a flexible portion, and pushing the first rigid portion into the first gripper, such that the first rigid portion is placed between the first gripper and the two leaf springs.

In some embodiments, the method may comprise the step of folding the circuit board while passing the flexible portion between the first and second sleeve ends and pushing the second rigid portion into the second gripper. In some embodiments, the method may comprise the step of inserting at least one battery into the sleeve prior to folding the circuit board.

According to some embodiments, the method may further comprise the steps of inserting the sleeve into an in-vivo device's housing, placing an optical dome on one side of the in-vivo device's housing, and placing a cover on another side of the in-vivo device's housing. According to some embodiments, the cover placed on the in-vivo device's housing may be an optical dome. In some embodiments, the in-vivo device may be a swallowable capsule.

It will be appreciated that for simplicity and clarity of illustration, elements shown in the figures have not necessarily been drawn accurately or to scale. For example, the dimensions of some of the elements may be exaggerated relative to other elements for clarity, or several physical components may be included in one functional block or element. Further, where considered appropriate, reference numerals may be repeated among the figures to indicate corresponding or analogous elements.

DETAILED DESCRIPTION OF THE INVENTION

Reference is now made toFIG. 1, which provides a schematic illustration of a sleeve for folding a rigid-flex PCB (Printed circuit board) in accordance with one embodiment of the invention. According to an embodiment of the invention, as described inFIG. 1, there is provided a sleeve10, which comprises a sleeve body11and two open ends18,19. Sleeve body11may be cylindrical, as shown inFIG. 1, but may also have other shapes that fit conveniently and efficiently within an in-vivo device. In preferred embodiments, sleeve body11is open at both ends. In some embodiments, there may be at least one gripper12on one open end18of the sleeve body11and at least one gripper15on the other open end19of the sleeve body11. In some embodiments there may be one or more additional grippers on either end, such as gripper13. Gripper12and/or gripper13are for retaining a rigid portion of the rigid-flex PCB perpendicularly to the axial direction of the sleeve11, against the upper rim of the sleeve11and against leaf springs14to be further described. Gripper15is to retain a rigid portion of the rigid-flex PCB perpendicularly to the axial direction of the sleeve11against the lower rim of the sleeve11.

According to some embodiments, sleeve10may further comprise leaf springs14for supporting a rigid portion of the PCB across the opening18of the sleeve11. Leaf springs14have a planar shape that is oriented generally perpendicular to the axial direction of the sleeve11, and leaf springs14extend radially inward into opening18from the outside rim of sleeve11. In some embodiments, leaf springs14may be on either end of the sleeve body11, or on both ends of the sleeve body11. The quantity of leaf springs14may vary according to design requirements, e.g., the size of the rigid portions of a rigid-flex PCB which may be supported by leaf springs14. For example, the larger the diameter of the rigid portion, the larger the quantity of leaf springs which may be used. In other embodiments, the number of leaf springs may be the same for any rigid portion's diameter, although the leaf springs may have larger dimensions in order to provide the rigid portion the support needed. Namely, in order to provide adequate support to rigid portions with varying dimensions, the leaf springs may either vary in size or quantity. In any case, there is typically more than one leaf spring present on either end18/19of sleeve11.

According to some embodiments, leaf springs14are positioned at the end of the sleeve body11, such that one rigid portion of the rigid-flex PCB may be inserted and held securely between gripper(s)12(and13) and leaf springs14. In some embodiments, leaf springs14may serve as support for the rigid-flex PCB to prevent the rigid portion of the PCB from entering into the interior of sleeve11. The rigid portion of the PCB may be pushed or snapped under grippers12and13while being supported by leaf springs14. In some embodiments, leaf springs14may not act as springs but may only provide mechanical support for a rigid portion of the PCB, namely by resting onto said leaf springs14the side of the rigid portion opposite the side of rigid portion that grippers12and13contact, such to ensure that the rigid portion is properly held at the opening18/19of the sleeve body11. In other embodiments, leaf springs14may serve as actual springs, i.e., leaf springs14may apply force on the side of the rigid portion opposite the side of the grippers, pushing it towards the underside of the overhanging portion of gripper12(and13). Leaf springs14may push one of the rigid portions of the rigid-flex PCB against grippers12and13so as to ensure a tight and firm hold of that rigid portion of the PCB within the sleeve10.

In some embodiments, due to the vagaries of mass production, the rigid portion of the rigid-flex PCB may have various widths since the tolerance during production is quite high. During mass production, the rigid portion of the PCB may be designed to have a final width of typically 0.70 mm but may also have a tolerance of about ±0.1 mm, which is of the same scope as the final width. Such a high tolerance may lead to a large variance in the width of the rigid portion. In order to ensure that the rigid portion of the PCB will stay within the gripper12(and13) so as to ensure that the rigid-flex PCB is held in a folded configuration, the sleeve10includes leaf springs14. In some embodiments, leaf springs14are designed to push the rigid PCB portion against the underside of the overhanging portion of gripper12(and13). Leaf springs14overcome the large variance of the rigid portions' widths by pushing the rigid portion against the underside of the overhanging portion of gripper12(and13). This secures the rigid portion of the PCB in between the grippers12and13and leaf springs14.

According to some embodiments, sleeve10may be made of any thermoplastic polymer such as Acetal, ABS, Polycarbonate, and Polyimide. Other materials may be used.

In some embodiments, the dimensions of the sleeve10may be for example, 10 mm in diameter, 10 mm in height and 0.3 mm in wall thickness. These dimensions are suitable for a sleeve intended to be inserted into a housing of the swallowable endoscopy capsule PillCam™ by Given Imaging Ltd. Other sleeve dimensions may be used. According to other embodiments, sleeve10may be inserted into a housing of other in-vivo devices.

Reference is now made toFIGS. 2A-2D, which are schematic illustrations of an assembly process in accordance with one embodiment of the invention. In some embodiments, the assembly process comprises folding and insertion of a rigid-flex PCB into a sleeve which may subsequently be inserted into a swallowable endoscopy capsule. According to an embodiment of the invention, as depicted inFIG. 2A, there is provided a rigid-flex circuit board20. In some embodiments, circuit board20may comprise a first rigid portion21, a second rigid portion23and a flexible portion22connecting the two rigid portions one to the other. In other embodiments, there may be more than two rigid portions which may be connected in series by respective flexible portions.

The first rigid portion21may have mounted thereon an imager, at least one illumination source and an optical system which may comprise lenses. These components may be mounted on one side of the first rigid portion21of the PCB (not shown). Other components may be mounted on the first rigid portion21. On the other side of the first rigid portion21, there may be a battery contact (shown as a spring221).

The second rigid portion23may have mounted thereon, on one side, a transmitter24and an antenna25(shown inFIG. 2D). Other components may be mounted on the second rigid portion23. On the other side of second rigid portion23, there may be, among other electronic components, a battery contact223, such that when circuit board20is in a folded position, one or more batteries may be placed in between the first rigid portion21and the second rigid portion23in order to power components mounted on circuit board20. The one or more batteries may be in contact with battery contacts from both sides, i.e., one battery contact from rigid portion21and another battery contact from rigid portion23.

In one embodiment, the rigid portion21is not a perfect circle, but is instead truncated in those areas where rigid portion21is supposed to be inserted into grippers12and/or13. In particular, in some embodiments, an arcuate portion of the circular shape of the rigid portion21is cut off, specifically in the areas where it would be snapped into grippers12and/or13when attached to an end of sleeve body11, i.e., at areas212and/or213of rigid portion21, respectively. These cut off portions212,213ensure better hold of the rigid portion21within the grippers12and/or13, since more of the surface area of the rigid portion21(212and/or213) is overlapping the surface area of grippers12and/or13.

Similarly, in some embodiments, an arcuate portion of the circular shape of the rigid portion23is cut off, specifically in the area where it would be snapped into gripper15when attached to an end of sleeve body11, i.e., at area215. For the same reason as before, truncating the rigid portion23in the areas where it would be snapped into gripper15ensures better hold of the rigid portion23within the gripper15, since more of the surface area of the rigid portion23(215) is overlapping the surface area of gripper15.

According to an embodiment of the invention, as depicted inFIG. 2B, rigid portion21is snapped into a first end of sleeve body11. Rigid portion21is snapped into gripper12and/or gripper13(not shown). The first end of sleeve body11may comprise leaf springs14in addition to gripper12and/or gripper13. According to an embodiment of the invention, rigid portion21may be snapped into gripper12and/or13such that it is held between gripper(s)12(and13) and leaf springs14. Typically, there are more than one gripper12and13, and there are more than one leaf springs14holding or pushing the rigid portion21against grippers12and/or13. The number of gripper12and13and leaf springs14may depend on the diameter of the rigid portion of the PCB. For example, the larger the diameter of the rigid portion, the more grippers and leaf springs there are for properly supporting the rigid portion. In other embodiments, the number of leaf springs may be the same for different sizes of the rigid portion; however, the leaf springs may have larger dimensions in order to provide adequate support.

According to an embodiment of the invention, as depicted inFIG. 2C, at least one battery16is inserted into sleeve body11, after the first rigid portion21is snapped into grippers12and/or13. In this embodiment, the diameter of battery16is slightly less than the diameter of sleeve11so as to provide for as little movement of battery16as possible within sleeve11when enclosed therein. In the embodiment shown inFIG. 2C, batteries16may be button-type or disk-shaped and may be stacked one atop another.

As shown inFIG. 2D, after the at least one battery16is inserted into sleeve body11, the flexible portion22of rigid-flex circuit board20is folded and extended between the two ends18and19of the sleeve body11. In some embodiments, the second rigid portion23is then snapped into gripper15such that rigid-flex circuit board20acquires its folded position. In some embodiments, there may be leaf springs on both ends of sleeve body11, i.e., there may be leaf springs at the same end of sleeve body11where gripper15is, but opposite to the gripper15. In these embodiments, the leaf springs may provide additional support to the second rigid portion23besides the support provided by gripper15. The additional leaf springs may secure and firmly hold the second rigid portion23in between the gripper15and the leaf springs.

However, in other embodiments, there are no leaf springs14in addition to gripper15, since the deformed, i.e., folded, flexible portion22of the rigid-flex PCB performs the functions of leaf spring14. In this embodiment, flexible portion22has been folded from its original flat configuration, as inFIG. 2A, and pushes itself back against gripper15. The flexible portion22of the PCB “wants” to return to its initial open configuration instead of the “un-natural” folded configuration, and provides the force against the underside of the overhanging portion of gripper15, so there is no need for extra leaf springs to push the rigid portion23against gripper15.

In some embodiments, the height of the sleeve11may be determined by the quantity and dimensions of the batteries16that are to be inserted into the sleeve body11. The height of sleeve11may be specifically determined by the number and thickness of batteries16. Accordingly, the battery/batteries16may push the second rigid portion23against gripper15, in addition to the self pushing of the rigid-flex PCB flexible portion22, while trying to return to its initial flat, i.e., un-folded, configuration.

In some embodiments, there is an opening222in the sleeve body11for flexible portion22to pass through. Since flexible portion22is folded near its connections to rigid portion21and rigid portion23(during assembly and folding of the rigid-flex PCB20into the sleeve10), the flexible portion22needs some extra space for the folds. In order to keep the folds from being pressed within the sleeve body11, flexible portion22is passed along an opening222that extends longitudinally in the sleeve body11between the two open ends of sleeve10, i.e., from one end18of sleeve11to the other end19. In some embodiments, there is also provided a space between the sleeve body11and the housing it is inserted into such that the flexible portion22is not pressed against the housing and so that the folds of flexible portion22would not be damaged. In other embodiments, the sleeve body11may not have an opening but instead may have a larger diameter to include the space needed to keep the folds of the flexible portion22unharmed. In these embodiments, in order to properly hold the rigid portions21and23within the grippers of the sleeve10, either the diameter of the rigid portions21and23is larger and/or the configuration of the grippers is designed to fit the larger diameter of sleeve10.

In some embodiments, rigid portion23may have mounted thereon a transmitter24and an antenna25, preferably on the side of rigid portion23which is external to the sleeve body11. In some embodiments, transmitter24and antenna25may be mounted on rigid portion23subsequent to insertion of rigid portion23into gripper15. Other components may be electrically connected to rigid portion23.

Reference is now made toFIG. 3which is a schematic illustration of a vertical cross section of a sleeve for folding a rigid-flex PCB in accordance with one embodiment of the invention. In this vertical cross section, the rigid portion21is held between grippers12and13on its outer side and leaf springs14on its inner side. Leaf springs14are shown to provide additional support for the rigid portion21of the rigid-flex PCB.

In some embodiments, rigid portion21, supported by leaf springs14, may have mounted thereon illumination sources26, image sensor28and an optical system27placed on top of the imager28. In some embodiments, the optical system27may comprise one lens, but in other embodiments optical system27may comprise more than one lens. According to some embodiments, leaf springs14may apply an axial force on the rigid portion21such that the rigid portion21is pushed against grippers12and13. This ensures a tight hold of the rigid portion21between the grippers12(and/or13) and leaf springs14, and further ensures that rigid-flex PCB20is held in a folded configuration before it is inserted into an in-vivo device.

Reference is now made toFIG. 4, which is a flow-chart illustrating a method of assembly in accordance with one embodiments of the invention. According to an embodiment of the invention, a method of assembly may comprise providing a sleeve with two open ends (block410). According to some embodiments, the sleeve provided may be sleeve10as illustrated inFIG. 1. However, in other embodiments, the sleeve may have other configurations and/or dimensions. In some embodiments, as for example in sleeve10, a first end of the sleeve may comprise a first gripper and at least two leaf springs, while the second sleeve's end may comprise a second gripper. In some embodiments, the second sleeve's end may also comprise leaf springs as does the first sleeve's end.

According to an embodiment of the invention, the method may comprise providing a circuit board (block420). In some embodiments, the circuit board may be a rigid-flex PCB which may comprise a first rigid portion and a second rigid portion which are connected by a flexible portion. The method may comprise pushing the first rigid portion of the circuit board into the first gripper (block430). In some embodiments, the sleeve may comprise at least two leaf springs on the same first sleeve's end but opposite to the gripper. The first rigid portion of the PCB may be pushed into the first gripper such that the rigid portion is held between the first gripper and the leaf springs. The leaf springs may provide support for the first rigid portion and moreover may push the rigid portion against the gripper so that the first rigid portion is tightly held within the sleeve's first end.

In some embodiments, the method comprises folding the PCB while passing the flexible portion, which connects between the first and second rigid portions, between the first and second sleeve's ends (block440). In order to achieve a final folded configuration of the rigid-flex PCB, the method may further comprise pushing the second rigid portion into the second gripper (block450). In some embodiments, the second sleeve's end may comprise leaf springs in addition to the second gripper, but in other embodiments, there may be only a gripper.

In some embodiments, the method may comprise placing at least one battery into the sleeve subsequent to pushing/snapping said first rigid portion into the first gripper and prior to folding the circuit board. The number and size of batteries which are intended to be inserted into the sleeve for powering the electronic components mounted on the PCB, would determine the dimensions of the sleeve, namely its width and height.

In some embodiments, there may be a plurality of rigid portions and a plurality of flexible portions, typically alternately, which may be folded into a sleeve. In these embodiments, the first rigid portion and the second rigid portion may be positioned at each end of the rigid-flex PCB, and may be inserted into the grippers and/or in between the grippers and leaf springs. In some embodiments, the plurality of flexible and rigid portions in between the rigid portions on each end of the PCB may be preferably folded in a stacked configuration. According to some embodiments, the dimensions of the sleeve may be determined by the length and diameter of the plurality of rigid and flexible portions of the PCB, along with the dimensions of the batteries to be placed in between the PCB portions.

According to some embodiments, the assembly process may comprise inserting the sleeve into an in-vivo device's housing. The in-vivo device may pass through a patient's body, for example, through the gastrointestinal (GI) tract. An in-vivo device may be an endoscopy capsule and its housing may be the capsule's case. After the sleeve, for example sleeve10, is inserted into an endoscopy capsule's housing, an optical dome may be placed over one end of the in-vivo device's housing. The end of the housing where the dome may be placed is typically at a side of the PCB where an imager is mounted. The transparent dome may be placed over an imager and an optical system to protect the imager and optical system during the time that they are operated to acquire in-vivo images through the dome. In addition, the outer surface of the dome functions to push tissue away from the imager when passing through ducts with collapsing walls, for example, the small intestine. Pushing the tissue away from the imager may allow image acquisition of tissue close by the capsule.

In some embodiments, a cover may be placed over the other open end of the housing, opposite to the optical dome. In some embodiments, the cover may be opaque. However, in other embodiments, the cover opposite the dome may be transparent. Furthermore, the cover may be another optical dome, specifically if another imager is mounted on the PCB on the side of the second rigid portion.

Sleeve body11, for example, may serve as a barrier between the endoscopy capsule's housing and the batteries which are inserted into the housing. If one of the circuits in the endoscopy capsule is short circuited, as can happen to any electrical circuit, the batteries may over-heat. If the batteries are in contact with the capsule's housing, the housing of the endoscopy capsule would also heat, which may cause damage to tissue in contact with the housing. In order to prevent such an event, the sleeve creates a distance between the batteries and the capsule's housing and so prevents over-heating of the housing and of the tissue surrounding it.

In some embodiments, in order to prevent over-heating of a tissue which may be in contact with the device's housing in adverse events of short circuits where the batteries over-heat, a sleeve for covering the batteries may be inserted into the housing. The sleeve, for example, sleeve body11as shown inFIG. 2C, may create a distance between the batteries16within the sleeve11and the housing of the device into which sleeve11is inserted. In other embodiments, there may be other mechanisms creating distance between the batteries and the housing of the device they are inserted into.

Reference is now made toFIG. 5, which is a schematic illustration of a side view of an in-vivo device's housing500in accordance with one embodiment of the invention. According to an embodiment of the invention, as depicted inFIG. 5, there is provided an in-vivo device's housing500into which a rigid-flex PCB is inserted, i.e., without use of a separate sleeve10, as shown inFIGS. 1-4. The device's housing500comprises a housing body511and two open ends518and519. Housing body511may be cylindrical, as shown inFIG. 5, but may also have other shapes that can conveniently and efficiently form an in-vivo device. In preferred embodiments, housing body511is open at both ends. In some embodiments, there may be at least one gripper512on one open end518of the housing body511and at least one gripper515on the other open end519of the housing body511. In some embodiments, there may be one or more additional grippers on either end, such as grippers513and516. Gripper512and/or gripper513are for retaining a rigid portion of a rigid-flex PCB perpendicularly to the axial direction of the housing511, against the upper rim of the housing511. Gripper515and/or gripper516are to retain a rigid portion of the rigid-flex PCB perpendicularly to the axial direction of the housing511against the lower rim of the housing511.

Reference is now made toFIG. 6which is a schematic illustration of an upper view of an in-vivo device's housing500in accordance with one embodiment of the invention.

According to some embodiments, as depicted inFIG. 6, housing500may further comprise ribs514and517extending longitudinally along, and protruding inward from, the inner side of housing body511. In some embodiments, some of ribs, e.g., ribs514may comprise at one end thereof a projection524that projects farther inward than do ribs514. Projection524may serve as a base to support the batteries that have been inserted into the housing511for powering the electrical components mounted on the rigid-flex PCB which may be folded in the housing body511. According to an embodiment of the invention, bottom grippers515and516retain a rigid portion of the rigid-flex PCB perpendicularly to the axial direction of the housing511, and batteries may then be inserted into housing511from the upper side518of housing511, for powering the electrical components mounted on that retained rigid portion. Projection524supports the batteries and further assists the batteries to maintain a position parallel to the rigid portion of the rigid-flex PCB so as to confirm adequate electrical contact between the surface of the batteries and the electrical components on the rigid portion. Following insertion of the batteries, upper grippers512and513retain a second rigid portion of the rigid-flex PCB perpendicularly to the axial direction of the housing511.

According to some embodiments, ribs514,517may space the batteries away from housing511and prevent direct contact between the two. Ribs514,517may create a distance between the batteries and the housing511such that in a case of a short circuit, for example, housing511would not over-heat as a result of the over-heating of the batteries. If the batteries would over-heat as a result of a short circuit in one or more of the electrical circuits of the rigid-flex PCB, the heat would distribute from the batteries to the ribs514,517and only then to the housing511, and the spacing between the batteries and the housing511created by ribs514,517helps to allow the batteries to cool off. Since there is no direct contact between the batteries and the housing511, the heat intensity is reduced before being transferred to the housing511, such that undesirable heating would be caused to the tissue in contact with the in-vivo device.

In some embodiments, housing511may further comprise ribs522between which the flexible portion of the rigid-flex PCB is positioned. The flexible portion of the rigid-flex circuit board is folded and extended between ribs522and further between the two ends518and519of the housing body511. In some embodiments, ribs522function as a groove for the flexible portion to pass along so that the flexible portion is held in place and wouldn't move within housing511. In addition, ribs522assist in creating a distance between the batteries and the housing511, such as ribs514and517, in an event of the batteries over-heating.

It will be appreciated that the present invention is not limited to what has been particularly shown and described hereinabove. Rather the scope of the present invention is defined only by the claims which follow.