Abstract: A waterproof tonneau cover includes a cover body, at least one waterproof bar and at least one waterproof shielding piece. The waterproof bar is mounted on a bottom of a side portion of the cover body. The waterproof shielding piece is attached to the side portion of the cover body and positioned on a top of the waterproof bar to cover a gap between the cover body and the waterproof bar, thereby preventing raindrops from entering a cargo bed through the gap.

Abstract: A corner assembly for a tonneau cover system of a pick-up truck is provided and has a corner member, a lid member and a lengthened cushion member. A connection surface of the corner member is formed with a stepped recess, and the lid member is embedded in the stepped recess to cover ribs and cavities in the stepped recess. The lengthened cushion member is L-shaped and attached to the connection surface of the corner member, the lid member and two surfaces of two adjacent frame members.

Abstract: A foldable tonneau cover for a pick-up truck is disclosed and has at least one clamp storage mechanism. Each of the clamp storage mechanism is provided with a cushion member mounted on a lower rigid cover of a frame section and over a distal end of a track rail. The cushion member has a storage notch for at least partially receiving a handle of a clamp assembly when the clamp assembly is shifted into a stored position. In the stored position, the handle is inclined in relation to the lower rigid cover, and the handle is located outside the track of the track rail. Thus, the convenience to manually operate the handle can be enhanced, the vibration during the pick-up truck is moving can be absorbed, the handle can be tightly positioned in the storage notch, and the entire strength of the lower rigid cover can be ensured.

Abstract: A foldable tonneau cover is disclosed and has two frame sections and at least one hidden-type hinge. Two frame members of two adjacent frame sections are correspondingly formed with two embedded holes. The hidden-type hinge is pivotally connected between the adjacent frame members. When the frame sections are horizontally extended relative to each other, the hidden-type hinge is substantially received in the embedded holes. When the frame sections are rotated or folded relative to each other, the hidden-type hinge is partially exposed out of the embedded holes. Thus, the occupied space of the hidden-type hinge and the gap between the adjacent frame sections can be minimized. The waterproof flexible strip can be continuously extended along the entire length of the two adjacent frame members without being interfered with by the hidden-type hinge substantially hidden within frame members, so as to enhance the waterproof reliability thereof.

Abstract: A foldable tonneau cover is disclosed and has two frame sections and at least one hidden-type hinge. Two frame members of two adjacent frame sections are correspondingly formed with two embedded holes. The hidden-type hinge is pivotally connected between the adjacent frame members. When the frame sections are horizontally extended relative to each other, the hidden-type hinge is substantially received in the embedded holes. When the frame sections are rotated or folded relative to each other, the hidden-type hinge is partially exposed out of the embedded holes. Thus, the occupied space of the hidden-type hinge and the gap between the adjacent frame sections can be minimized. The waterproof flexible strip can be continuously extended along the entire length of the two adjacent frame members without being interfered with by the hidden-type hinge substantially hidden within frame members, so as to enhance the waterproof reliability thereof.

Abstract: A foldable tonneau cover is disclosed and has two frame sections and at least one hidden-type hinge. Two frame members of two adjacent frame sections are correspondingly formed with two embedded holes. The hidden-type hinge is pivotally connected between the adjacent frame members. When the frame sections are horizontally extended relative to each other, the hidden-type hinge is substantially received in the embedded holes. When the frame sections are rotated or folded relative to each other, the hidden-type hinge is partially exposed out of the embedded holes. Thus, the occupied space of the hidden-type hinge and the gap between the adjacent frame sections can be minimized. The waterproof flexible strip can be continuously extended along the entire length of the two adjacent frame members without being interfered with by the hidden-type hinge substantially hidden within frame members, so as to enhance the waterproof reliability thereof.

Abstract: A foldable tonneau cover is disclosed and has two frame sections and at least one hidden-type hinge. Two frame members of two adjacent frame sections are correspondingly formed with two embedded holes. The hidden-type hinge is pivotally connected between the adjacent frame members. When the frame sections are horizontally extended relative to each other, the hidden-type hinge is substantially received in the embedded holes. When the frame sections are rotated or folded relative to each other, the hidden-type hinge is partially exposed out of the embedded holes. Thus, the occupied space of the hidden-type hinge and the gap between the adjacent frame sections can be minimized. The waterproof flexible strip can be continuously extended along the entire length of the two adjacent frame members without being interfered with by the hidden-type hinge substantially hidden within frame members, so as to enhance the waterproof reliability thereof.

Abstract: A foldable tonneau cover is disclosed and has two frame sections and at least one hidden-type hinge. Two frame members of two adjacent frame sections are correspondingly formed with two embedded holes. The hidden-type hinge is pivotally connected between the adjacent frame members. When the frame sections are horizontally extended relative to each other, the hidden-type hinge is substantially received in the embedded holes. When the frame sections are rotated or folded relative to each other, the hidden-type hinge is partially exposed out of the embedded holes. Thus, the occupied space of the hidden-type hinge and the gap between the adjacent frame sections can be minimized. The waterproof flexible strip can be continuously extended along the entire length of the two adjacent frame members without being interfered with by the hidden-type hinge substantially hidden within frame members, so as to enhance the waterproof reliability thereof.

Abstract: A foldable tonneau cover is disclosed and has two frame sections and at least one hidden-type hinge. Two frame members of two adjacent frame sections are correspondingly formed with two embedded holes. The hidden-type hinge is pivotally connected between the adjacent frame members. When the frame sections are horizontally extended relative to each other, the hidden-type hinge is substantially received in the embedded holes. When the frame sections are rotated or folded relative to each other, the hidden-type hinge is partially exposed out of the embedded holes. Thus, the occupied space of the hidden-type hinge and the gap between the adjacent frame sections can be minimized. The waterproof flexible strip can be continuously extended along the entire length of the two adjacent frame members without being interfered with by the hidden-type hinge substantially hidden within frame members, so as to enhance the waterproof reliability thereof.

Abstract: A hinge for a foldable tonneau cover is provided and has two pivotal members, a base member and two detachable screwing assemblies. Each of the pivotal members is connected to at least one frame member of a frame section and has at least one first through hole. The base member has at least two second through holes, each of which is corresponding to the first through hole of each of the pivotal members. Each of the detachable screwing assemblies has a bolt member and a nut member. The bolt member has a thread rod, the nut member has a thread hole provided with a tight fitting member inserted therein, and the thread rod of the bolt member is screw-connected to the thread hole of the nut member and tightly fitted with the tight fitting member in the thread hole.

Abstract: A composite tonneau cover of a pick-up truck is disclosed. The composite tonneau cover has at least one frame section and is releasably secured on a side wall of a cargo bed of the pick-up truck. Each of the frame section comprises: a flexible cover material; a rigid metal panel covered by the flexible cover material and having at least two end edges; and a plurality of outer rails covered by the flexible cover material. Each of the outer rails has an inner side formed with an installation groove, and each of the end edges of the rigid metal panel is inserted into the installation groove of one of the outer rails. Thus, the composite tonneau cover can provide dual advantages of hard-top type tonneau cover and soft-top type tonneau cover.

Abstract: A tension control assembly for a flexible tonneau cover system of a pick-up truck has an adjustable engagement plate and a screw assembly. The adjustable engagement plate has an engagement hook to selectively engage in one of engagement holes formed on a side rail, and further has a positioning hole to position the screw assembly according to the engagement relationship between the engagement hook and the engagement holes, so that the adjustable engagement plate and the screw assembly can be used to adjust and stably keep a longitudinal position of a front header in relation to a length direction of the side rail, so as to prevent from causing vibration noise. Meanwhile, a transverse position of the front header in relation to a width direction of the side rail can be simultaneously adjusted during adjusting the longitudinal position of the front header.

Abstract: A side fastening assembly for a flexible tonneau cover system of a pick-up truck is provided and has a first fastener sewn on an elongated slat by two sewing threads. The first fastener sewn on the elongated slat can ensure the attachment strength of the first fastener, so as to elongate the lifetime of the first fastener and lower the maintenance cost thereof. The side fastening assembly further has a second fastener attached to a flexible cover material of a flexible cover assembly. The first fastener and the second fastener are engaged with each other in a case that the flexible cover material is unrolled rearward on the side rail to cover the cargo bed.

Abstract: A clamp structure for a tonneau cover of a pick-up truck is disclosed and mounted to one frame section of a tonneau cover for releasably securing the frame section on a side wall of a cargo bed of the pick-up truck. The clamp structure has a composite grip element which has a metal grip body and a plastic sleeve. The metal grip body has an engaging portion to stably engage with the side wall of the pick-up truck. The plastic sleeve has a first abutment flange to smoothly abut against a turning handle, and a second abutment end facing a sliding block. Thus, the composite grip element can provide advantages of both of metal and plastic material, so that the operational stability and reliability of the clamp structure can be enhanced, and the lifetime thereof can be elongated.

Abstract: A corner assembly for a tonneau cover system of a pick-up truck is provided and has a corner member, a lid member and a lengthened cushion member. A connection surface of the corner member is formed with a stepped recess, and the lid member is embedded in the stepped recess to cover ribs and cavities in the stepped recess. The lengthened cushion member is L-shaped and attached to the connection surface of the corner member, the lid member and two surfaces of two adjacent frame members. Thus, the present invention can efficiently maintain the effective buffering thickness of the lengthened cushion member, absorb vibration, and prevent from impact between frame members and a cargo box to thus reduce or eliminate noise.

Abstract: A tension control assembly for a flexible tonneau cover system of a pick-up truck has an adjustable engagement plate and a screw assembly. The adjustable engagement plate has an engagement hook to selectively engage in one of engagement holes formed on a side rail, and further has a positioning hole to position the screw assembly according to the engagement relationship between the engagement hook and the engagement holes, so that the adjustable engagement plate and the screw assembly can be used to adjust and stably keep a longitudinal position of a front header in relation to a length direction of the side rail, so as to prevent from causing vibration noise. Meanwhile, a transverse position of the front header in relation to a width direction of the side rail can be simultaneously adjusted during adjusting the longitudinal position of the front header.

Abstract: A composite tonneau cover of a pick-up truck is disclosed. The composite tonneau cover has at least one frame section and is releasably secured on a side wall of a cargo bed of the pick-up truck. Each of the frame section comprises: a flexible cover material; a rigid metal panel covered by the flexible cover material and having at least two end edges; and a plurality of outer rails covered by the flexible cover material. Each of the outer rails has an inner side formed with an installation groove, and each of the end edges of the rigid metal panel is inserted into the installation groove of one of the outer rails. Thus, the composite tonneau cover can provide dual advantages of hard-top type tonneau cover and soft-top type tonneau cover.

Abstract: A clamp structure for a tonneau cover of a pick-up truck is disclosed and mounted to one frame section of a tonneau cover for releasably securing the frame section on a side wall of a cargo bed of the pick-up truck. The clamp structure has a composite grip element which has a metal grip body and a plastic sleeve. The metal grip body has an engaging portion to stably engage with the side wall of the pick-up truck. The plastic sleeve has a first abutment flange to smoothly abut against a turning handle, and a second abutment end facing a sliding block. Thus, the composite grip element can provide advantages of both of metal and plastic material, so that the operational stability and reliability of the clamp structure can be enhanced, and the lifetime thereof can be elongated.

Abstract: A side fastening assembly for a flexible tonneau cover system of a pick-up truck is provided and has a first fastener sewn on an elongated slat by two sewing threads. The first fastener sewn on the elongated slat can ensure the attachment strength of the first fastener, so as to elongate the lifetime of the first fastener and lower the maintenance cost thereof. The side fastening assembly further has a second fastener attached to a flexible cover material of a flexible cover assembly. The first fastener and the second fastener are engaged with each other in a case that the flexible cover material is unrolled rearward on the side rail to cover the cargo bed.