PORTABLE TRIPOD

A portable tripod, comprising: a connecting assembly (2), first to third supporting legs (1), and a middle shaft tube (4). At least one supporting foot (3) is embedded into each of the first to third supporting legs (1), and the first to third supporting legs (1) and the supporting feet (3) respectively in the supporting legs can be folded inwards to form a compact hollow cylinder. The middle shaft tube (4) is embedded into the connecting assembly (2), the first to third supporting legs (1) and the supporting feet (3) respectively in the supporting legs can be folded inwards to form the compact hollow cylinder that can compactly match the middle shaft tube (4), and the portable tripod is small in overall size after being stored and portable, and can be put into a pocket.

BACKGROUND

1. Technical Field Text

The present disclosure relates to a tripod, in particular to a portable tripod. The present disclosure relates to a tripod, in particular to a portable tripod.

2. Background Information

The tripod is a commonly used supporting structure known traditionally, and three supporting legs are used to provide a stable and reliable supporting platform for other equipment. The most common application is that the tripod is used as a support for equipment such as cameras, but the tripod also has many potential applications. For example, the tripod can also be used to support a laser aiming instrument for surveying, a camera for photography, a telescope for sky observation, and so on.

BRIEF SUMMARY

Technical Problems

For the sake of easy carrying, the tripod is generally of a folded structure. However, in the prior art, there is a large interval between the three supporting legs and the middle shaft tube after the tripod is folded. Therefore, the folded tripod is still very large in size and is still inconvenient to carry.

Technical Solutions

In order to overcome the disadvantages in the prior art, the present disclosure provides a portable tripod small in size.

In order to achieve the above-mentioned purpose, the present disclosure adopts the following technical scheme.

A portable tripod includes a connecting assembly, a first to third supporting feet and a middle shaft tube. A head end of the supporting leg is rotatably connected with the connecting assembly. At least one supporting foot is embedded into each of the first to third supporting legs. The first to third supporting legs and the supporting feet respectively in the supporting legs can be folded inwards to form a compact hollow cylinder. The middle shaft tube is embedded into the connecting assembly. The first to third supporting legs and the supporting feet respectively in the supporting legs can be folded inwards to form the compact hollow cylinder that can compactly match the middle shaft tube. The space shape of the hollow cylinder described herein is matched with the middle shaft tube. The space utilization ratio of the first to third supporting legs and the middle shaft tube is maximized after the tripod is stored, so that the tripod is very compact. Therefore, the portable tripod in the embodiment of the present disclosure is small in size after being stored and is very portable.

Preferably, the central section of the supporting leg is in the shape of a ⅓ hollow ring. Thus, three such supporting legs and the middle shaft tube can form a compact space.

Preferably, the supporting leg includes a pair of side walls, an upper arc-shaped wall and a lower arc-shaped wall, and the pair of side walls, the upper arc-shaped wall and the lower arc-shaped wall are encircled to form an annular tube body. Thus, three such supporting legs and the middle shaft tube can form a compact space.

Further, in order to enhance the structural strength of the supporting legs and the supporting feet embedded into the supporting legs, the side walls of the supporting leg include an upper side wall and a lower side wall, and each pair of side walls are encircled in pairs in opposite directions to form the shape of a “bracket”. In the present disclosure, the shape of a “bracket” can be a similar shape of “( )”, a similar shape of “< >” or other variants. Upper and lower openings in the shape of a “bracket” are smaller than the maximum diameter inside the shape of a “bracket”, so the supporting leg and the supporting foot embedded into the supporting leg cannot be separated from the side walls when being stretched.

Optionally, every two adjacent lower side walls are matched with each other in pairs after the first to third supporting legs are folded inwards. At this time, the space utilization rate is the highest.

Optionally, according to different requirements and in order to reduce the weight, every two adjacent lower side walls are arranged at a certain interval after the first to third supporting legs are folded inwards.

Preferably, the connecting assembly includes a connecting base, a locking knob and a locking ring. The connecting base is internally in the shape of a circular ring. Three outward protruding base heads and at least one locking threaded hole are arranged outside the connecting base. The locking threaded hole is in threaded connection with the locking knob. The locking ring is coaxial to the connecting base. The head end of the supporting leg includes a connector, and the connector is rotatably connected with the base head. It is understandable that in the machinery field, the connector and the base head are rotatably connected in many manners. For example, a coaxial base shaft hole is respectively formed in both sides of the base head. The base shaft hole is internally provided with a base shaft. A connecting hole is formed in the interior of the connector. The connecting hole in the interior of the connector is coaxial to the base shaft hole. The base shaft passes through the connecting hole in the interior of the connector and the base shaft hole so that head ends of the first to third supporting legs are rotatably connected with the connecting base. Examples are not given in detail herein. The middle shaft tube is embedded into the connecting assembly. The middle shaft tube can be immovably fixed in the connecting assembly, and also can move in the connecting assembly fixed at different positions. The locking ring includes a locking bulge, a locking half-opening and a locking full-opening. The locking bulge is coaxial to the locking threaded hole. When the middle shaft tube needs to move up and down, the locking knob is loosened, and then the middle is moved up and down to a required position. The locking knob is screwed down. At this time, the locking knob can extrude the locking bulge inward. The locking ring is tightened, and the middle shaft tube is fixed immovably. There are still many ways to realize the fixation of the connecting assembly and the middle shaft tube, and examples are not given in detail herein.

Preferably, in order to stabilize the tripod, the portable tripod also includes a support fixing device. The support fixing device includes three pairs of support rails, three pairs of support rods and support connectors. The three pairs of support rails are mounted at lower ends of the two upper side walls of the first to third supporting legs respectively. The three pairs of support rods are slidably mounted on the three pairs of support rails respectively, and at least one end of the support rod is not separated from the support rail. The other ends of the three pairs of support rods are rotatably mounted on the support connectors respectively. Those skilled in the art easily realize that there are many ways to mount the three pairs of support rails at the lower ends of the two upper side walls of the first to third supporting legs, such as direct bonding with strong glue, or inserting by a physical structure with a bolt method. In addition, the three pairs of support rails can also be directly integrally formed with the lower ends of the two upper side walls of the first to third supporting legs, so examples are not given in detail herein.

Further, a cylindrical cavity is formed in the interior of the support rail. For the purpose that the tripod can be fixed at different opening angles, a strip opening with a width of smaller than the diameter of the cylindrical cavity is formed in the outer side of the support rail. The strip opening is suitably matched with the support rod. That is, when the tripod is unfolded, one end of the support rod can be fixed at different positions of the support rail, and then different angles are realized. The bulges can prevent one end of the support rod from sliding up and down after being fixed.

Further, the support connector includes a support tray and three claws. The three claws are arranged outside the support tray, and the included angle between every two claws is 120 degrees. Two openings with an included angle of 120 degrees are formed in a tail end of the claw. A spherical cavity is formed in the interior of the opening. Protruding balls are arranged at both ends of the support rod. The spherical cavity is suitably rotatably connected with the protruding ball at the other end of the support rod. In order to prevent the protruding ball at the other end of the support rod from falling off, the ball diameter of the protruding ball is larger than the width of the opening, and the protruding ball at the other end of the support rod can rotate up and down at the spherical cavity along the opening.

In a further scheme, the support connector also includes a support shaft. A hollow hole is formed in the center of the support tray. An upper end of the support shaft is of a screw structure. The upper end of the support shaft is in threaded connection with a lower end of the middle shaft tube to play a fixing role. The middle part of the support shaft is rotatably connected with the hollow hole in the center of the support tray. An annular clamping slot is formed in the middle part of the support shaft. The annular clamping slot restricts the support shaft from moving up and down. That is, the support shaft can perform rotational movement only. The lower end of the support shaft is provided with a clamping shaft and a round top. The lower end of the support shaft can be connected with a mounting hole in the bottom of a tripod head through the clamping shaft and the round top. Therefore, the lower end of the support shaft is provided with the clamping shaft and the round top, so that the usage scenarios of the tripod are expanded. For example, a camera can be used for inverted shooting at a low angle.

Further, the support tray also includes a clamping bulge. In the embodiment, the support of the portable tripod is in a stored state, and the clamping bulge is matched with the supporting leg to prevent the supporting leg from sliding out.

Preferably, the support rail is of certain elasticity, so that one end of the support rod can smoothly pass through the bulges on both sides of the strip opening in the lower end of the support rail when sliding up and down. One end of the support rod can be fixed without artificial external force by the bulges.

Optionally, the middle shaft tube is a single tube. For ease of quick loading and unloading of the tripod head, an upper end of the middle shaft tube is provided with a clamping shaft and a round top. A threaded hole is formed in a lower end of the middle shaft tube, and the middle shaft tube can be connected with the mounting hole in the bottom of a tripod head through the clamping shaft and the round top.

Optionally, in order to lengthen the length of the middle shaft tube, at least one middle shaft sleeve sleeves the middle shaft tube internally. The middle shaft tube and the middle shaft sleeve are adjacent in pairs and telescopically connected. A threaded hole is formed in a lower end of the middle shaft sleeve. An upper end of the innermost middle shaft sleeve is provided with a clamping shaft and a round top. The innermost middle shaft sleeve is connected with a mounting hole in the bottom of a tripod head through the clamping shaft and the round top. Therefore, on one hand, the overall height of the entire tripod can be lengthened by a plurality of sleeves embedded into the middle shaft tube. On the other hand, the middle shaft tube can be used as a selfie stick alone when the middle shaft tube is disassembled, or the middle shaft tube is not disassembled, and the first to third supporting legs are used as handles and the middle shaft tube is used as a selfie stick when the tripod is stored.

Preferably, n supporting feet are embedded into the supporting leg in sequence, and n is a positive integer of larger than or equal to 3.

Further, a limit hole is formed in a tail end of the supporting leg. Head ends of the first to (n−1)-th supporting feet are provided with a locating hole and a locating device respectively. The locating device includes a base, a locating spring, locating shafts and a locating rail. The locating rail is mounted in the base and coaxial to the locating hole. The locating spring is arranged at the middle part inside the locating rail. The locating shafts are arranged on both sides of the locating spring respectively. The locating shaft can move on the locating rail and is coaxial to the locating hole. The middle part of the locating shaft is provided with a protruding fixture block. Of course, the locating rail can also be integrally formed with the base, or even the base and the head end of the supporting foot can also be integrally formed. In addition, the base plays a role in fixedly connecting the head ends of the first to (n−1)-th supporting feet at the same time.

Tail ends of the first to (n−2)-th supporting feet are provided with a limit hole and a fixed ring respectively. The fixed rings are fixedly mounted at the tail ends of the first to (n−2)-th supporting feet. The fixed ring plays a role in fixedly connecting the tail ends of the first to (n−2)-th supporting feet. When the first supporting foot is stretched, the locating shaft of the first supporting foot enters into the limit hole in the tail end of the supporting leg1under the effect of the locating spring. At this time, the locating shaft of the first supporting foot gets stuck by the limit hole in the tail end of the supporting leg1. The first supporting foot is fixed and cannot be stretched again. When the second to (n−1)-th supporting feet are stretched out, the corresponding locating shaft enters into the corresponding locating hole under the effect of the corresponding locating spring. For example, the locating shaft of the second supporting foot enters into the locating hole of the first supporting foot under the effect of the locating spring of the second supporting leg. At this time, the locating shaft of the second supporting leg gets stuck by the limit hole of the first supporting leg. The second supporting foot is fixed and cannot be stretched again. At the same time, the fixed ring at the tail end of the first supporting foot plays a role in stabilizing the first and second supporting feet. The stretching processes of the third to (n−1)-th supporting feet and the effects of the corresponding fixed rings are analogized in sequence, and are not described in detail any more.

A tail end of the (n−1)-th supporting foot is provided with a limit ring. The limit ring can prevent the head end of the n-th supporting foot from being separated from the tail end of the (n−1)-th supporting foot. An unlocking hole is formed in the base at head ends of the second to (n−1)-th supporting feet, and the unlocking holes in the bases at the head ends of the second to (n−1)-th supporting feet are matched with the protruding fixture blocks at the middle parts of the locating shafts at the head ends of the first to (n−2)-th supporting feet respectively. A head end of the n-th supporting foot is provided with an unlocking block, an unlocking hole is formed in the unlocking block, and the unlocking hole in the unlocking block is suitably matched with the protruding fixture block at the middle part of the locating shaft at the head end of the (n−1)-th supporting foot. The n-th supporting foot is provided with a fastening device, and the fastening device is suitably matched with an inner wall of the (n−1)-th supporting foot. That is, the n-th supporting foot can be tightly fixed together with the inner wall at any position of the (n−1)-th supporting foot through the fastening device. A tail end of the n-th supporting foot is provided with a foot cap.

Further, in order to save limited space, the transverse sections of the first to (n−2)-th supporting feet are in the shape of a “bracket”. That is, the first to (n−2)-th supporting feet consist of a pair of supports with the transverse sections in the shape of a “bracket”.

In a further scheme, all “brackets” with the transverse sections in the shape of a “bracket” of the first to (n−2)-th supporting feet are the same in heights. That is, the heights of the “brackets” do not need to be decreased layer by layer like the diameter of the circular sleeve, so the strength of each supporting foot can be ensured to the maximum extent. In addition, the height refers to the height of a single “bracket”. The widths on both sides of the first to (n−2)-th supporting feet are decreased layer by layer, so two adjacent supporting feet can be embedded together.

Further, the (n−1)-th supporting foot is tubular, but the transverse sections on both sides of the (n−1)-th supporting foot are still in the shape of a “bracket”. Thus, the strength of the (n−1)-th supporting foot can be enhanced.

Under the description, one end, close to the connecting assembly, of each of all supporting legs and all supporting feet is called as a head end, and the other ends are called as tail ends. When n is equal to 3, the first to (n−2)-th supporting feet indicate the first supporting foot, and the second to (n−2)-th supporting feet indicate the second supporting foot.

In an optional scheme, n supporting feet are embedded into the supporting leg in sequence, and n is equal to 2. That is, two supporting feet are embedded into the supporting leg1in sequence.

Further, a limit hole is formed in a tail end of the supporting leg. A head end of the first supporting foot is provided with a locating hole and a locating device respectively. The locating device includes a base, a locating spring, locating shafts and a locating rail. The locating rail is mounted in the base and coaxial to the locating hole. The locating spring is arranged at the middle part inside the locating rail. The locating shafts are arranged on both sides of the locating spring respectively. The locating shaft can move on the locating rail and is coaxial to the locating hole. The middle part of the locating shaft is provided with a protruding fixture block.

When the first supporting foot is stretched, the locating shaft enters into the limit hole under the effect of the locating spring. At this time, the locating shaft of the first supporting foot gets stuck by the limit hole in the tail end of the supporting leg. The first supporting foot is fixed and cannot be stretched again. A tail end of the first supporting foot is provided with a limit ring. The limit ring can prevent the head end of the n-th supporting foot from being separated from the tail end of the (n−1)-th supporting foot. A head end of the n-th supporting foot is provided with an unlocking block, an unlocking hole is formed in the unlocking block, and the unlocking hole in the unlocking block is suitably matched with the protruding fixture block at the middle part of the locating shaft at the head end of the (n−1)-th supporting foot.

The n-th supporting foot is provided with a fastening device, and the fastening device is suitably matched with an inner wall of the (n−1)-th supporting foot. That is, the n-th supporting foot can be tightly fixed together with the inner wall at any position of the (n−1)-th supporting foot through the fastening device. A tail end of the n-th supporting foot is provided with a foot cap.

Further, the (n−1)-th supporting foot is tubular.

In an optional scheme, n supporting feet are embedded into the supporting leg, and n is equal to 1. That is, one supporting foot3is embedded into the supporting leg1. A tail end of the supporting leg is provided with a limit ring. The n-th supporting foot is provided with a fastening device, and the fastening device is suitably matched with an inner wall of the supporting leg. A tail end of the n-th supporting foot is provided with a foot cap.

In an above-mentioned optional scheme and/or an optional scheme, the fastening device includes a fastening shaft, a fastening spring and a fastening head. The middle part of the fastening shaft is provided with a protruding clamp ring. One end of the fastening head is convexly provided with two elastic clamping pieces. A circular hole is formed in the center of the fastening head. A circular hole is formed in the center of the unlocking hole.

The n-th supporting foot is embedded into the fastening shaft, and the fastening shaft can move and rotate inside the n-th supporting foot. The foot cap is fixedly connected with one end of the fastening shaft. The other end of the fastening head is fixedly connected with a head end of the n-th supporting foot. The other end of the fastening shaft is rotatably connected with the circular hole in the center of the unlocking block. The fastening spring is embedded into the fastening shaft. One end of the fastening spring is fixed to the protruding clamp ring, and the other end of the fastening spring is fixed to the other end of the fastening head. The fastening spring is always in a stretched state. The outer side of the unlocking block is slidably matched with the two elastic clamping pieces. When the outer side of the unlocking block slides to tail ends of the two elastic clamping pieces, the elastic clamping pieces are fastened and extruded with the inner wall of the (n−1)-th supporting foot. That is, the n-th supporting foot is fixed without moving at this time. When the outer side of the unlocking block slides to head ends of the two elastic clamping pieces, the elastic clamping pieces can slide with the inner wall of the (n−1)-th supporting foot easily. Thus, the movement of the n-th supporting foot at any position on the inner wall of the (n−1)-th supporting foot is realized. That is to say, the n-th supporting foot and the (n−1)-th supporting foot can be adjusted at different supporting heights, so that the applicability of the tripod is improved.

In an above-mentioned optional scheme and/or an optional scheme, there is still another implementation way to realize the fastening device of the n-th supporting foot. That is, the fastening device of the n-th supporting foot can be directly realized by designing the n-th supporting foot as a slightly elliptical tube body and arranging a slightly elliptical limit ring at the tail end of the (n−1)-th supporting foot. The slightly elliptical tube body of the n-th supporting foot and the slightly elliptical limit ring arranged at the tail end of the (n−1)-th supporting foot can rotate left and right to complete locking fastening fit or unlocking sliding fit. In order to complete unlocking for the (n−1)-th supporting foot, a circular hole is formed in the center of the unlocking block, and the head end of the n-th supporting foot is rotatably connected with the circular hole in the center of the unlocking block.

Further, the foot cap is internally provided with a clamping bulge. A groove is formed in the tail end of the n-th supporting foot. The fastening spring is always in a stretched state. When the outer side of the unlocking block slides to the tail ends of the two elastic clamping pieces, the clamping bulge is in tight fit with the groove in the tail end of the n-th supporting foot. When the outer side of the unlocking block slides to the head ends of the two elastic clamping pieces, the clamping bulge inside the foot cap is disengaged from the groove in the tail end of the n-th supporting foot outwards and gets away from an opening of the groove rotatably.

In an above-mentioned optional scheme, the portable tripod also includes a locating hole guide system. The locating hole guide system is arranged in the supporting legs and the first to (n−1)-th supporting feet embedded into the supporting legs in sequence. When the first to (n−1)-th supporting feet are stretched, the locating hole guide system respectively guides the locating shaft to enter into the limit hole under the effect of the locating spring.

In a further scheme, the locating hole guide system includes groove plates and bulge plates. The groove plates are respectively embedded and fixed into both sides of the tail end of the supporting leg and both sides of the tail ends of the first to (n−2)-th supporting feet, and a groove of the groove plate faces towards the connecting assembly. The bulge plates are respectively fixedly mounted on both sides of the bases of the locating devices in the first to (n−1)-th supporting feet, and a bulge of the bulge plate faces towards the foot cap. When the first to (n−1)-th supporting feet are stretched, the bulge plates of the first to (n−1)-th supporting feet are respectively matched with the groove plates of the first to (n−2)-th supporting feet and guide the corresponding locating shaft to enter into the corresponding limit hole under the effect of the corresponding locating spring. For example, when the first supporting foot is stretched, the bulge plate of the first supporting foot is matched with the groove plate of the supporting leg and guides the locating shaft of the first supporting foot to enter into the limit hole of the supporting leg under the effect of the locating spring. When the second supporting foot is stretched, the bulge plate of the second supporting foot is matched with the groove plate of the first supporting foot and guides the locating shaft of the second supporting foot to enter into the limit hole of the first supporting foot under the effect of the locating spring. The rest may be deduced by analogy.

In another further scheme, the locating hole guide system includes rail slots. The rail slots are respectively formed in both sides of the supporting leg and both inner sides of the first to (n−2)-th supporting feet. One end of each of the rail slots is respectively ended at the limit holes in both sides of the tail end of the supporting leg and the limit holes in both sides of the tail ends of the first to (n−2)-th supporting feet, and the other ends of the rail slots are respectively ended at both sides of the head end of the supporting leg and both sides of the head ends of the first to (n−2)-th supporting feet.

In an above-mentioned optional scheme, the portable tripod also includes a locating hole guide system. The locating hole guide system is arranged in the supporting legs and the first supporting foot embedded into the supporting legs in sequence. When the first supporting foot is stretched, the locating hole guide system guides the locating shaft to enter into the limit hole under the effect of the locating spring.

In a further scheme, the locating hole guide system includes groove plates and bulge plates. The groove plates are embedded and fixed into both sides of the tail end of the supporting leg, and a groove of the groove plate faces towards the connecting assembly. The bulge plates are respectively fixedly mounted on both sides of the base of the locating device in the first supporting foot, and a bulge of the bulge plate faces towards the foot cap. When the first supporting foot is stretched, the bulge plate of the first supporting foot is matched with the groove plate of the supporting leg and guides the corresponding locating shaft to enter into the corresponding limit hole under the effect of the locating spring.

In another further scheme, the locating hole guide system includes rail slots. The rail slots are formed in both sides of the supporting leg. One end of each of the rail slots is respectively ended at the limit holes in both sides of the tail end of the supporting leg, and the other ends of the rail slots are respectively ended at both sides of the head end of the supporting leg. When the first supporting foot is stretched, the locating shaft of the first supporting foot reaches and enters into the corresponding limit hole under the guide of the rail slot and the effect of the locating spring.

Beneficial Effects

Compared with the prior art, the portable tripod provided by the present disclosure has the following beneficial effects.

Firstly, the portable tripod is compact in structure, small in size after storage, and very portable.

Secondly, due to the compact structure of the portable tripod, the first to third supporting legs can be stored and used as handles, so in some embodiments, the middle shaft tube can be independently stretched and used as a selfie stick.

Thirdly, according to the portable tripod, in some embodiments in which a plurality of sleeves can sleeve the middle shaft tube, the middle shaft tube can be optionally quickly disassembled from the connecting assembly, and the middle shaft tube can be used as a selfie stick alone after disassembly.

The following clearly and completely describes the technical scheme in the embodiments of the present disclosure with reference to the attached figures in the embodiments of the present disclosure. Apparently, the described embodiments are merely a part rather than all of the embodiments of the present disclosure. Generally, the described and illustrated components of the embodiments of the present disclosure in the attached figures can be arranged and designed through various different configurations. Therefore, the detailed description of the embodiments of the present disclosure provided in the attached figures is not intended to restrict the protected scope of the present disclosure, but merely represents the selected embodiment of the present disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of the present disclosure without creative efforts shall fall within the protection scope of the present disclosure.

Embodiment I

As shown inFIG.1, the embodiment of the present disclosure provides a portable tripod. The portable tripod includes a connecting assembly2, first to third supporting legs1and a middle shaft tube4. A head end of the supporting leg1is rotatably connected with the connecting assembly2, and at least one supporting foot3is embedded into the supporting leg1. As shown inFIG.6toFIG.12, the first to third supporting legs1and the supporting feet3respectively in the supporting legs can be folded inwards to form a compact hollow cylinder. As shown inFIG.13, the middle shaft tube4is embedded into the connecting assembly2, and the first to third supporting legs1and the supporting feet3respectively in the supporting legs1can be folded inwards to form the compact hollow cylinder that can compactly match the middle shaft tube4. Those skilled in the art easily understand that the space shape of the hollow cylinder described herein is matched with the middle shaft tube4. The space utilization ratio of the first to third supporting legs1and the middle shaft tube4is maximized after the tripod is stored, so that the tripod is very compact. Therefore, the portable tripod in the embodiment of the present disclosure is small in size after being stored and is very portable.

As shown inFIG.3,FIG.4andFIG.5, in the embodiment, the central section of the supporting leg1is in the shape of a ⅓ hollow ring. The supporting leg1includes a pair of side walls14, an upper arc-shaped wall12and a lower arc-shaped wall13, and the pair of side walls14, the upper arc-shaped wall12and the lower arc-shaped wall13are encircled to form an annular tube body. Those skilled in the art easily understand that the central section of the supporting leg of the general tripod is in the shape of a circular ring, that is, in the shape of an “O”, and it is difficult for three supporting legs in the shape of “O” and the middle shaft tube to form a compact space. However, in the embodiment, the central section of the supporting leg1is in the shape of a ⅓ hollow ring, and three such supporting legs1and the middle shaft tube can form a compact space.

In order to enhance the structural strength of the supporting legs1and the supporting feet3embedded into the supporting legs1, as shown inFIG.3andFIG.4, the side walls14of the supporting leg1include an upper side wall141and a lower side wall142, and each pair of side walls14are encircled in pairs in opposite directions to form the shape of a “bracket”. It is understandable that in the embodiment, the shape of a “bracket” can be a similar shape of “( )”, a similar shape of “< >” or other variants. Upper and lower openings in the shape of a “bracket” are smaller than the maximum diameter inside the shape of a “bracket”, so the supporting leg1and the supporting foot3embedded into the supporting leg cannot be separated from the side walls14when being stretched.

In the embodiment, as shown inFIG.6, every two adjacent lower side walls142are matched with each other in pairs after the first to third supporting legs1are folded inwards. At this time, the space utilization rate is the highest. Of course, optionally, in another embodiment, according to different requirements and in order to reduce weight, every two adjacent lower side walls142are arranged at a certain interval after the first to third supporting legs1are folded inwards. For example, the central section of the supporting leg1is in the shape of a ¼ hollow ring, and three such supporting legs1in the shape of a ¼ hollow ring are encircled to form a hollow cylinder at a certain interval.

In the embodiment, as shown inFIG.7andFIG.8, the connecting assembly2includes a connecting base21, a locking knob22and a locking ring23. The connecting base2is internally in the shape of a circular ring. Three outward protruding base heads211and at least one locking threaded hole214are arranged outside the connecting base21. The locking threaded hole214is in threaded connection with the locking knob22. The locking ring23is coaxial to the connecting base21. As shown inFIG.2andFIG.7, the head end of the supporting leg1includes a connector11, and the connector11is rotatably connected with the base head211. It is understandable that in the machinery field, the connector11and the base head211are rotatably connected in many manners. For example, as shown inFIG.1andFIG.7, a coaxial base shaft hole212is respectively formed in both sides of the base head211. The base shaft hole212is internally provided with a base shaft213. A connecting hole111is formed in the interior of the connector11. The connecting hole111in the interior of the connector11is coaxial to the base shaft hole212. The base shaft213passes through the connecting hole111in the interior of the connector11and the base shaft hole212so that head ends of the first to third supporting legs1are rotatably connected with the connecting base21. Examples are not given in detail herein. The middle shaft tube4is embedded into the connecting assembly2. The middle shaft tube4can be immovably fixed in the connecting assembly2, and also can move in the connecting assembly2fixed at different positions. As shown inFIG.1andFIG.7, the locking ring23includes a locking bulge231, a locking half-opening232and a locking full-opening233. The locking bulge231is coaxial to the locking threaded hole214. When the middle shaft tube4needs to move up and down, the locking knob22is loosened, and then the middle4is moved up and down to a required position. The locking knob22is screwed down. At this time, the locking knob22can extrude the locking bulge231inward. The locking ring23is tightened, and the middle shaft tube is fixed immovably. There are still many ways to realize the fixation of the connecting assembly2and the middle shaft tube, and examples are not given in detail herein.

In an optimized embodiment, as shown inFIG.1, in order to stabilize the tripod, the portable tripod also includes a support fixing device5. As shown inFIG.4,FIG.9A,FIG.9BandFIG.9C, the support fixing device5includes three pairs of support rails51, three pairs of support rods52and support connectors53. The three pairs of support rails51are mounted at lower ends of the two upper side walls141of the first to third supporting legs1respectively. The three pairs of support rods52are slidably mounted on the three pairs of support rails51respectively, and at least one end of the support rod52is not separated from the support rail. The other ends of the three pairs of support rods52are rotatably mounted on the support connectors53respectively. Those skilled in the art easily realize that there are many ways to mount the three pairs of support rails51at the lower ends of the two upper side walls of the first to third supporting legs1, such as direct bonding with strong glue, or inserting by a physical structure with a bolt method. In addition, the three pairs of support rails51can also be directly integrally formed with the lower ends of the two upper side walls of the first to third supporting legs1, so examples are not given in detail herein.

As shown inFIG.3,FIG.4andFIG.5, a cylindrical cavity is formed in the interior of the support rail51. For the purpose that the tripod can be fixed at different opening angles, a strip opening511with a width of smaller than the diameter of the cylindrical cavity is formed in the outer side of the support rail51. At least one pair of bulges5110are arranged on both sides of the strip opening511at the lower end of the support rail51. The strip opening511is suitably matched with the support rod52. That is, when the tripod is unfolded, one end of the support rod52can be fixed at different positions of the support rail51, and then different angles are realized. The bulges5110can prevent one end of the support rod52from sliding up and down after being fixed. As shown inFIG.3, in order to prevent the support rod52from being separated from the support rail, an outlet512with a minimum diameter of smaller than the diameter of the cylindrical cavity is formed in the lower end of the support rail51. As shown inFIG.4, for ease of mounting, a mounting port513with a minimum diameter of larger than or equal to the diameter of the cylindrical cavity is formed in the inner side of the lower end of the support rail51. The support rod52can be mounted into the support rail51through the mounting port513in advance, and then the support rail51is mounted at the lower ends of the two upper side walls141of the supporting leg1. At the same time, the mounting port513is closed.

As shown inFIG.10andFIG.11, the support connector53includes a support tray531and three claws532. The three claws532are arranged outside the support tray531, and the included angle between every two claws532is 120 degrees. Two openings5321with an included angle of 120 degrees are formed in a tail end of the claw532. A spherical cavity5322is formed in the interior of the opening5321. As shown inFIG.4, protruding balls521are arranged at both ends of the support rod52. The spherical cavity5322is suitably rotatably connected with the protruding ball521at the other end of the support rod52. It is understandable that in order to prevent the protruding ball521at the other end of the support rod52from falling off, the ball diameter of the protruding ball521is larger than the width of the opening5321, and the protruding ball521at the other end of the support rod52can rotate up and down at the spherical cavity5322along the opening5321.

As shown inFIG.10, the support connector53also includes a support shaft533. A hollow hole is formed in the center of the support tray531. An upper end of the support shaft533is of a screw structure5331. The upper end of the support shaft533is in threaded connection with a lower end of the middle shaft tube4to play a fixing role. The middle part of the support shaft4is rotatably connected with the hollow hole in the center of the support tray531. An annular clamping slot (unshown in figures) is formed in the middle part of the support shaft533. The annular clamping slot restricts the support shaft533from moving up and down. That is, the support shaft533can perform rotational movement only. A lower end of the support shaft533is provided with a clamping shaft5332and a round top5333. As shown inFIG.32,FIG.33andFIG.34, the lower end of the support shaft533can be connected with a mounting hole in the bottom of a tripod head9through the clamping shaft5332and the round top5333. Therefore, the lower end of the support shaft533is provided with the clamping shaft5332and the round top5333, so that the usage scenarios of the tripod are expanded. For example, a camera can be used for inverted shooting at a low angle.

As shown inFIG.10,FIG.11andFIG.28A, the support tray531also includes a clamping bulge5311. In the embodiment, the support of the portable tripod is in a stored state, and the clamping bulge5311is matched with the supporting leg3to prevent the supporting leg3from sliding out.

Preferably, the support rail51is of certain elasticity, so that one end of the support rod52can smoothly pass through the bulges on both sides of the strip opening511in the lower end of the support rail51when sliding up and down. One end of the support rod52can be fixed without artificial external force by the bulges.

An unfolding process of the support fixing device5of the portable tripod in the embodiment is briefly described below.

First, as shown inFIG.13andFIG.28A, the tripod is in a stored state, the support rod52(unshown in figures) is arranged in the support rail51, and the support shaft533is in threaded connection with the lower end of the middle shaft tube4.

Then, as shown inFIG.14, the threaded connection between the support shaft533and the lower end of the middle shaft tube4is unscrewed, and the support rod52is pulled outward to a certain position.

Finally, as shown inFIG.1, the supporting leg1is opened. At the same time, the other end of the support rod52is in threaded connection with the lower end of the middle shaft tube4again through the support shaft533fixedly. At this time, different opening angles of the supporting leg1can be realized by adjusting the position of one end of the support rod52at the strip opening511in the lower end of the support rail51.

In an optional scheme, the middle shaft tube4is a single tube. For ease of quick loading and unloading of the tripod head9, an upper end of the middle shaft tube4is provided with a clamping shaft402and a round top401. The middle shaft tube4can be connected with the mounting hole in the bottom of the tripod head9through the clamping shaft402and the round top401. A threaded hole is formed in a lower end of the middle shaft tube4. That is, the threaded hole can be in threaded connection with the upper end of the support shaft533.

Of course, as shown inFIG.29, in order to lengthen the length of the middle shaft tube4, in another optional scheme, at least one middle shaft sleeve41sleeves the middle shaft tube4internally. The middle shaft tube4and the middle shaft sleeve41are adjacent in pairs and telescopically connected. A threaded hole is formed in a lower end of the innermost middle shaft sleeve41. An upper end of the innermost middle shaft sleeve41is provided with a clamping shaft402and a round top401. The innermost middle shaft sleeve41is connected with a mounting hole in the bottom of a tripod head9through the clamping shaft402and the round top401. It should be noted that the tripod head9described herein may be a photographic tripod head9disclosed in Chinese Invention Patent ZL201620760201.6. Therefore, on one hand, the overall height of the entire tripod can be lengthened by a plurality of middle shaft sleeves41embedded into the middle shaft tube4. On the other hand, the middle shaft tube4can be used as a selfie stick alone when the middle shaft tube4is disassembled, or the middle shaft tube4is not disassembled, and the first to third supporting legs1are used as handles and the middle shaft tube4is used as a selfie stick when the tripod is stored.

In the embodiment, n supporting feet3are embedded into the supporting leg1in sequence, and n is a positive integer of greater than or equal to 3. That is, at least three supporting feet3are embedded into the supporting leg1in sequence. Here, for ease of the description of the relationship between the supporting leg1and the internal supporting feet3, “n” is used to express the number of the supporting feet3.

In one of specific embodiments, n is equal to 5. As shown inFIG.15andFIG.16, the first to n-th supporting feet include a first supporting foot31, a second supporting foot32, a third supporting foot33, a fourth supporting foot34and a fifth supporting foot35respectively. The following describes the specific structures and telescoping principles of the supporting leg1and the first to n-th supporting feet in the specific embodiment.

First, the specific structures and stretching process of the supporting leg1and the first to (n−1)-th supporting feet in the specific embodiment are described as follows.

As shown inFIG.13, a limit hole101is formed in a tail end of the supporting leg1. As shown inFIG.17A,FIG.17B,FIG.17CandFIG.17D, head ends of the first to (n−1)-th supporting feet are provided with a locating hole601and a locating device6respectively. The locating device includes a base61, a locating spring62, locating shafts63and a locating rail64. The locating rail64is mounted in the base61and coaxial to the locating hole601. The locating spring62is arranged at the middle part inside the locating rail64. The locating shafts63are arranged on both sides of the locating spring62respectively. The locating shaft63can move on the locating rail64and is coaxial to the locating hole601. The middle part of the locating shaft63is provided with a protruding fixture block631. Of course, those skilled in the art easily understand that the locating rail63can also be integrally formed with the base61, and even the base61and the head end of the supporting leg can be integrally formed. In addition, the base61simultaneously plays a role in fixedly connecting the head ends of the first to (n−1)-th supporting feet. As shown inFIG.17A,FIG.17B,FIG.17C,FIG.17DandFIG.18, tail ends of the first to (n−2)-th supporting feet are provided with a limit hole301and a fixed ring302respectively. The fixed rings302are fixedly mounted at the tail ends of the first to (n−2)-th supporting feet. The fixed ring302plays a role in fixedly connecting the tail ends of the first to (n−2)-th supporting feet. When the first supporting foot is stretched, the locating shaft63of the first supporting foot enters into the limit hole101in the tail end of the supporting leg1under the effect of the locating spring62. At this time, the locating shaft63of the first supporting foot gets stuck by the limit hole101in the tail end of the supporting leg1. The first supporting foot is fixed and cannot be stretched again. When the second to (n−1)-th supporting feet are stretched out, the corresponding locating shaft63enters into the corresponding locating hole301under the effect of the corresponding locating spring62. For example, the locating shaft63of the second supporting foot enters into the locating hole301of the first supporting foot under the effect of the locating spring62of the second supporting leg. At this time, the locating shaft63of the second supporting leg gets stuck by the limit hole301of the first supporting leg. The second supporting foot is fixed and cannot be stretched again. At the same time, the fixed ring302at the tail end of the first supporting foot plays a role in stabilizing the first and second supporting feet. The stretching processes of the third to (n−1)-th supporting feet and the effects of the corresponding fixed rings are analogized in sequence, and are not described in detail any more.

As shown inFIG.19,FIG.20AandFIG.20B, a tail end of the (n−1)-th supporting foot is provided with a limit ring303. The limit ring303can prevent the head end of the n-th supporting foot from being separated from the tail end of the (n−1)-th supporting foot.

In order to solve the problem that the first to (n−1)-th supporting feet are fixed and cannot be stretched during being stretched out, the following structures of the second to n-th supporting feet in the specific embodiment are designed as follows.

as shown inFIG.19,FIG.20A,FIG.20B,FIG.21andFIG.22, an unlocking hole610is formed in the base61at head ends of the second to (n−1)-th supporting feet, and the unlocking holes610in the bases at the head ends of the second to (n−1)-th supporting feet are matched with the protruding fixture blocks631at the middle parts of the locating shafts63at the head ends of the first to (n−2)-th supporting feet respectively. A head end of the n-th supporting foot is provided with an unlocking block611. An unlocking hole610is formed in the unlocking block611. The unlocking hole610in the unlocking block611is suitably matched with the protruding fixture block631at the middle part of the locating shaft63at the head end of the (n−1)-th supporting foot.

As shown inFIG.19,FIG.20A,FIG.20B,FIG.21andFIG.22, the n-th supporting foot is provided with a fastening device8, and the fastening device8is suitably matched with an inner wall of the (n−1)-th supporting foot. That is, the n-th supporting foot can be tightly fixed together with the inner wall at any position of the (n−1)-th supporting foot through the fastening device8.

A tail end of the n-th supporting foot is provided with a foot cap351. As shown inFIG.25,FIG.26, andFIG.27, in order to save space, the unlocking holes610in the base61and the locating rails64are staggered up and down, and the locating rails64on the base61are not on the same axis along the direction of the supporting foot.

Further, as shown inFIG.19,FIG.20A,FIG.20B,FIG.21andFIG.22, the fastening device8includes a fastening shaft81, a fastening spring82and a fastening head83, the middle part of the fastening shaft81is provided with a protruding clamp ring811. One end of the fastening head83is convexly provided with two elastic clamping pieces831. A circular hole830is formed in the center of the fastening head83. A circular hole612is formed in the center of the unlocking hole611.

As shown inFIG.19, the n-th supporting foot is embedded into the fastening shaft81, and the fastening shaft81can move and rotate inside the n-th supporting foot. The foot cap351is fixedly connected with one end of the fastening shaft81. As shown inFIG.20AandFIG.20B, the other end of the fastening head83is fixedly connected with a head end of the n-th supporting foot. The other end of the fastening shaft81is rotatably connected with the circular hole612in the center of the unlocking block611. As shown inFIG.21andFIG.22, the fastening spring82is embedded into the fastening shaft81. One end of the fastening spring82is fixed to the protruding clamp ring811, and the other end of the fastening spring82is fixed to the other end of the fastening head83. The fastening spring82is always in a stretched state. The outer side of the unlocking block611is slidably matched with the two elastic clamping pieces831. As shown inFIG.20A, when the outer side of the unlocking block611slides to tail ends of the two elastic clamping pieces831, the elastic clamping pieces831are fastened and extruded with the inner wall of the (n−1)-th supporting foot. That is, the n-th supporting foot is fixed without moving at this time. As shown inFIG.20B, when the outer side of the unlocking block611slides to head ends of the two elastic clamping pieces831, the elastic clamping pieces831can slide with the inner wall of the (n−1)-th supporting foot easily. Thus, the movement of the n-th supporting foot at any position on the inner wall of the (n−1)-th supporting foot is realized. That is to say, the n-th supporting foot and the (n−1)-th supporting foot can be adjusted at different supporting heights, so that the applicability of the tripod is improved.

Of course, there are still many ways to realize the movement of the n-th supporting foot at any position on the inner wall of the (n−1)-th supporting foot. For example, the fastening device8of the n-th supporting foot can be directly realized by designing the n-th supporting foot as a slightly elliptical tube body and arranging a slightly elliptical limit ring303at the tail end of the (n−1)-th supporting foot. The slightly elliptical tube body of the n-th supporting foot and the slightly elliptical limit ring303of the (n−1)-th supporting foot can rotate left and right to complete locking fastening fit or unlocking sliding fit. In order to complete unlocking for the (n−1)-th supporting foot, a circular hole612is formed in the center of the unlocking block612, and the head end of the n-th supporting foot is rotatably connected with the circular hole612in the center of the unlocking block.

Further, as shown inFIG.19, the foot cap351is internally provided with a clamping bulge3510. A groove350is formed in the tail end of the n-th supporting foot. The fastening spring82is always in a stretched state. When the outer side of the unlocking block611slides to the tail ends of the two elastic clamping pieces831, the clamping bulge3510is in tight fit with the groove350in the tail end of the n-th supporting foot. At this time, under the tensile force that the fastening spring82is stretched, the unlocking block611always stays at the tail ends of the two elastic clamping pieces831to realize that the n-th supporting foot is fixed without moving for a long time. When the n-th supporting foot needs to move, the outer side of the unlocking block611slides to the head ends of the two elastic clamping pieces831, and the clamping bulge3510inside the foot cap351is disengaged from the groove350in the tail end of the n-th supporting foot outwards and gets away from an opening of the groove rotatably at the same time. At this time, the clamping bulge3510inside the foot cap351is jacked a tail end port of the n-th supporting foot. At this time, the n-th supporting foot can easily move to any required position. When the n-th supporting foot moves to another position, the foot cap351is rotated again so that the clamping bulge3510inside the foot cap aligns to the opening of the groove350at the tail end of the n-th supporting foot. And then, the hand is loosened, and the clamping bulge3510inside the foot cap is in tight fit with the groove350in the tail end of the n-th supporting foot under the effect of the fastening spring82, so that long-time fixation at another position is realized.

As shown inFIG.29toFIG.34, the supporting foot of the portable tripod in the present disclosure can be unfolded at various different heights. The n-th supporting foot and the (n−1)-th supporting foot can be adjusted at different supporting heights, so that the applicability of the tripod is improved, and required heights can be adjusted on different ground surfaces. In addition, upper and lower ends of the middle shaft tube can be both connected with the tripod head, so that the applicability of the tripod is further improved.

The following describes the storage principle of the first to n-th supporting feet in the specific embodiment briefly.

As shown inFIG.29toFIG.34, the first to n-th supporting feet in the specific embodiment can be completely unfolded, and also can be partially unfolded. During storage, the backmost supporting foot starts to be stored, and then other supporting feet are stored one by one inwards. The first to (n−1)-th supporting feet are unlocked by the unlocking hole610formed in the unlocking block611on the n-th supporting foot and the unlocking holes610in the base61at the head ends of the second to (n−1)-th supporting feet in sequence respectively. The unlocking principles of the supporting feet are the same. How to unlock the head end of the second supporting foot and the tail end of the first supporting foot in the fixed state by the unlocking hole610in the third supporting foot during storage is illustrated only herein. As shown inFIG.23AandFIG.23B, when the third supporting foot is about to be stored to the bottom, a bevel edge of the unlocking hole610on the third supporting foot and a bevel edge of the fixture block631on the second supporting foot make contact with each other. As the third supporting foot is further stored inward, through interaction force of the bevel edge of the unlocking hole610in the third supporting foot and the bevel edge of the fixture block631on the second supporting foot, the locating shaft63on the second supporting foot moves inward along the axial direction and is gradually disengaged from the locating hole301in the tail end of the first supporting foot. As shown inFIG.24AandFIG.24B, when the third supporting foot is further stored inward, the locating shaft63on the second supporting foot is completely disengaged from the locating hole301in the tail end of the first supporting foot. At this time, the second supporting foot can be stored towards the interior of the first supporting foot. Those skilled in the art can easily understand that, for ease of description, the functions of the limit hole101in the tail end of the supporting leg1and the limit holes301in the tail end of the first to (n−2)-th supporting feet are exactly the same, so the unlocking principles are also the same.

In order to save limited space, as shown inFIG.28BandFIG.28C, the transverse sections of the first to (n−2)-th supporting feet are in the shape of a “bracket”. That is, the first to (n−2)-th supporting feet consist of a pair of supports with the transverse sections in the shape of a “bracket”. The upper and lower parts of the “bracket” are open, so all “brackets” with the transverse sections in the shape of a “bracket” of the first to (n−2)-th supporting feet are the same in heights. That is, the heights of the “brackets” do not need to be decreased layer by layer like the diameter of the circular sleeve, so the strength of each supporting foot can be ensured to the maximum extent. In addition, the height refers to the height of a single “bracket”. The widths on both sides of the first to (n−2)-th supporting feet are decreased layer by layer, so two adjacent supporting feet can be embedded together. The (n−1)-th supporting foot is tubular, but the transverse sections on both sides of the (n−1)-th supporting foot are still in the shape of a “bracket”. Thus, the strength of the (n−1)-th supporting foot can be enhanced. Those skilled in the art easily understand that the transverse section of the (n−1)-th supporting foot may also be directly in the shape of a “bracket”, or that both the (n−2)-th supporting foot and the (n−1)-th supporting foot are tubular, or even any other supporting foot may be tubular or the supporting foot apart from another supporting foot may be tubular, but the strengths and space saving degrees of the supporting feet are different, and these two types of supporting feet may be combined in various ways. Examples are not given here one by one.

In the specific embodiment, n is equal to 5, so the n-th supporting foot is the fifth supporting foot, the (n−1)-th supporting foot is the fourth supporting foot, and the (n−2)-th supporting foot is the third supporting foot. The reason why n is expressed in the present disclosure is that the number of supporting feet can be combined in various ways, the n-th supporting foot is the last supporting foot, and the (n−1)-th supporting foot is the penultimate supporting foot, so that the expression is very convenient. It should be understood that if n is equal to 3, the expression of the first to (n−2)-th supporting feet actually indicates the first supporting foot, and the expression of the second to (n−1)-th supporting feet actually indicates the second supporting foot. In addition, under the description, one end, close to the connecting assembly2, of each of all supporting legs1and all supporting feet3is called as a head end, and the other ends are called as tail ends.

Embodiment II

The main difference between the second embodiment and the first embodiment lies in that n supporting feet3are embedded into the supporting leg in sequence, and n is equal to 2. That is, two supporting feet3are embedded into the supporting leg1in sequence. Here, for ease of the description of the relationship between the supporting leg1and the internal supporting feet3, “n” is used to express the number of the supporting feet3. In order to simplify the space, the second embodiment shares the attached figures with a specific embodiment in which n is equal to 5 described in the first embodiment, and the shared attached figures are described as follows.

The supporting leg1in the second embodiment is the same as the supporting leg1in the first embodiment.

The first supporting foot in the second embodiment is the same as the fourth supporting foot in the first embodiment.

The second supporting foot in the second embodiment is the same as the fifth supporting foot in the first embodiment.

The first to third supporting feet in one specific embodiment in which n is equal to n in the first embodiment are omitted, so that the portable tripod in the second embodiment is formed. Therefore, the portable tripod in the second embodiment is smaller and lighter, so that the portable tripod is mainly suitable for mobile photography.

As shown inFIG.13, a limit hole101is formed in a tail end of the supporting leg1. As shown inFIG.17A,FIG.17B,FIG.17CandFIG.17D, a head end of the first supporting foot is provided with a locating hole601and a locating device6respectively. The locating device6includes a base61, a locating spring62, locating shafts63and a locating rail64. The locating rail64is mounted in the base61and coaxial to the locating hole601. The locating spring62is arranged at the middle part inside the locating rail64. The locating shafts63are arranged on both sides of the locating spring62respectively. The locating shaft63can move on the locating rail64and is coaxial to the locating hole601. The middle part of the locating shaft63is provided with a protruding fixture block631.

When the first supporting foot is stretched, the locating shaft63of the first supporting foot enters into the limit hole101in the tail end of the supporting foot under the effect of the locating spring62. At this time, the locating shaft63of the first supporting foot gets stuck by the limit hole101in the tail end of the supporting leg. The first supporting foot is fixed and cannot be stretched again. A tail end of the first supporting foot is provided with a limit ring303. The limit ring303can prevent the head end of the n-th supporting foot from being separated from the tail end of the (n−1)-th supporting foot. A head end of the n-th supporting foot is provided with an unlocking block611. An unlocking hole610is formed in the unlocking block611. The unlocking hole610in the unlocking block611is suitably matched with the protruding fixture block631at the middle part of the locating shaft63at the head end of the (n−1)-th supporting foot.

As shown inFIG.19,FIG.20A,FIG.20B,FIG.21andFIG.22, the n-th supporting foot is provided with a fastening device8, and the fastening device8is suitably matched with an inner wall of the (n−1)-th supporting foot. That is, the n-th supporting foot can be tightly fixed together with the inner wall at any position of the (n−1)-th supporting foot through the fastening device8. A tail end of the n-th supporting foot is provided with a foot cap351.

Further, as shown inFIG.19,FIG.20A,FIG.20B,FIG.21andFIG.22, the fastening device8includes a fastening shaft81, a fastening spring82and a fastening head83, the middle part of the fastening shaft81is provided with a protruding clamp ring811. One end of the fastening head83is convexly provided with two elastic clamping pieces831. A circular hole830is formed in the center of the fastening head83. A circular hole612is formed in the center of the unlocking hole611.

The n-th supporting foot is embedded into the fastening shaft81, and the fastening shaft81can move and rotate inside the n-th supporting foot. The foot cap351is fixedly connected with one end of the fastening shaft81. The other end of the fastening head83is fixedly connected with a head end of the n-th supporting foot. The other end of the fastening shaft81is rotatably connected with the circular hole612in the center of the unlocking block611. The fastening spring82is embedded into the fastening shaft81. One end of the fastening spring82is fixed to the protruding clamp ring811, and the other end of the fastening spring82is fixed to the other end of the fastening head83. The fastening spring82is always in a stretched state. The outer side of the unlocking block611is slidably matched with the two elastic clamping pieces831. As shown inFIG.20A, when the outer side of the unlocking block611slides to tail ends of the two elastic clamping pieces831, the elastic clamping pieces831are fastened and extruded with the inner wall of the (n−1)-th supporting foot. That is, the n-th supporting foot is fixed without moving at this time. As shown inFIG.20B, when the outer side of the unlocking block611slides to head ends of the two elastic clamping pieces831, the elastic clamping pieces831can slide with the inner wall of the (n−1)-th supporting foot easily. Thus, the movement of the n-th supporting foot at any position on the inner wall of the (n−1)-th supporting foot is realized. That is to say, the n-th supporting foot and the (n−1)-th supporting foot can be adjusted at different supporting heights, so that the applicability of the tripod is improved.

Of course, there are still many ways to realize the movement of the n-th supporting foot at any position on the inner wall of the (n−1)-th supporting foot. For example, the fastening device8of the n-th supporting foot can be directly realized by designing the n-th supporting foot as a slightly elliptical tube body and arranging a slightly elliptical limit ring303at the tail end of the (n−1)-th supporting foot. The slightly elliptical tube body of the n-th supporting foot and the slightly elliptical limit ring303of the (n−1)-th supporting foot can rotate left and right to complete locking fastening fit or unlocking sliding fit. In order to complete unlocking for the (n−1)-th supporting foot, a circular hole612is formed in the center of the unlocking block612, and the head end of the n-th supporting foot is rotatably connected with the circular hole612in the center of the unlocking block.

Further, as shown inFIG.19, the foot cap351is internally provided with a clamping bulge3510. A groove350is formed in the tail end of the n-th supporting foot. The fastening spring82is always in a stretched state. When the outer side of the unlocking block611slides to the tail ends of the two elastic clamping pieces831, the clamping bulge3510is in tight fit with the groove350in the tail end of the n-th supporting foot. At this time, under the tensile force that the fastening spring82is stretched, the unlocking block611always stays at the tail ends of the two elastic clamping pieces831to realize that the n-th supporting foot is fixed without moving for a long time. When the n-th supporting foot needs to move, the outer side of the unlocking block611slides to the head ends of the two elastic clamping pieces831, and the clamping bulge3510inside the foot cap351is disengaged from the groove350in the tail end of the n-th supporting foot outwards and gets away from an opening of the groove rotatably at the same time. At this time, the clamping bulge3510inside the foot cap351is jacked a tail end port of the n-th supporting foot. At this time, the n-th supporting foot can easily move to any required position. When the n-th supporting foot moves to another position, the foot cap351is rotated again so that the clamping bulge3510inside the foot cap aligns to the opening of the groove350at the tail end of the n-th supporting foot. And then, the hand is loosened, and the clamping bulge3510inside the foot cap is in tight fit with the groove350in the tail end of the n-th supporting foot under the effect of the fastening spring82, so that long-time fixation at another position is realized.

In one specific embodiment, the (n−1)-th supporting foot is tubular. Those skilled in the art easily understand that the transverse section of the (n−1)-th supporting foot may also be in the shape of a “bracket” directly.

The telescoping principle of the supporting leg1and the first to n-th supporting feet in the second embodiment is similar to that in the first embodiment, and is not described in detail any more.

In the specific embodiment, n is equal to 2, so the n-th supporting foot is the second supporting foot, and the (n−1)-th supporting foot is the first supporting foot. The reason why n is expressed in the present disclosure is that the expression is very convenient. In addition, under the description, one end, close to the connecting assembly2, of each of all supporting legs1and all supporting feet3is called as a head end, and the other ends are called as tail ends.

Embodiment III

The main difference between the third embodiment and the first embodiment lies in that n supporting feet3are embedded into the supporting leg in sequence, and n is equal to 1. That is, one supporting foot3is embedded into the supporting leg1. Here, for ease of the description of the relationship between the supporting leg1and the internal supporting feet3, “n” is used to express the number of the supporting feet3. In order to simplify the space, the third embodiment shares the attached figures with a specific embodiment in which n is equal to 5 described in the first embodiment, and the shared attached figures are described as follows.

The supporting leg1in the third embodiment is the same as the supporting leg1in the first embodiment.

The n-th supporting foot in the third embodiment, namely the first supporting foot, is the same as the fifth supporting foot in the first embodiment.

The first to fourth supporting feet in one specific embodiment in which n is equal to n in the first embodiment are omitted, so that the portable tripod in the second embodiment is formed. Therefore, the portable tripod in the second embodiment is smaller and lighter, so that the portable tripod is mainly suitable for mobile photography.

As shown inFIG.20AandFIG.20B, a limit hole303is formed in a tail end of the supporting leg1. The n-th supporting foot is provided with a fastening device8, and the fastening device8is suitably matched with an inner wall of the supporting leg1. A tail end of the n-th supporting foot is provided with a foot cap351.

Further, as shown inFIG.19,FIG.20A,FIG.20B,FIG.21andFIG.22, the fastening device8includes a fastening shaft81, a fastening spring82and a fastening head83, the middle part of the fastening shaft81is provided with a protruding clamp ring811. One end of the fastening head83is convexly provided with two elastic clamping pieces831. A circular hole830is formed in the center of the fastening head83. A circular hole612is formed in the center of the unlocking hole611.

The n-th supporting foot is embedded into the fastening shaft81, and the fastening shaft81can move and rotate inside the n-th supporting foot. The foot cap351is fixedly connected with one end of the fastening shaft81. The other end of the fastening head83is fixedly connected with a head end of the n-th supporting foot. The other end of the fastening shaft81is rotatably connected with the circular hole612in the center of the unlocking block611. The fastening spring82is embedded into the fastening shaft81. One end of the fastening spring82is fixed to the protruding clamp ring811, and the other end of the fastening spring82is fixed to the other end of the fastening head83. The fastening spring82is always in a stretched state. The outer side of the unlocking block611is slidably matched with the two elastic clamping pieces831. As shown inFIG.20A, when the outer side of the unlocking block611slides to tail ends of the two elastic clamping pieces831, the elastic clamping pieces831are fastened and extruded with the inner wall of the supporting leg1. That is, the n-th supporting foot is fixed without moving at this time. As shown inFIG.20B, when the outer side of the unlocking block611slides to head ends of the two elastic clamping pieces831, the elastic clamping pieces831can slide with the inner wall of the supporting leg1easily. Thus, the movement of the n-th supporting foot at any position on the inner wall of the supporting leg1is realized. That is to say, the n-th supporting foot and the supporting leg1can be adjusted at different supporting heights, so that the applicability of the tripod is improved.

Of course, there are still many ways to realize the movement of the n-th supporting foot at any position on the inner wall of the supporting leg1. For example, the fastening device8of the n-th supporting foot can be directly realized by designing the n-th supporting foot as a slightly elliptical tube body and arranging a slightly elliptical limit ring303at the tail end of the supporting leg1. The slightly elliptical tube body of the n-th supporting foot and the slightly elliptical limit ring303of the (n−1)-th supporting foot can rotate left and right to complete locking fastening fit or unlocking sliding fit.

Further, as shown inFIG.19, the foot cap351is internally provided with a clamping bulge3510. A groove350is formed in the tail end of the n-th supporting foot. The fastening spring82is always in a stretched state. When the outer side of the unlocking block611slides to the tail ends of the two elastic clamping pieces831, the clamping bulge3510is in tight fit with the groove350in the tail end of the n-th supporting foot. At this time, under the tensile force that the fastening spring82is stretched, the unlocking block611always stays at the tail ends of the two elastic clamping pieces831to realize that the n-th supporting foot is fixed without moving for a long time. When the n-th supporting foot needs to move, the outer side of the unlocking block611slides to the head ends of the two elastic clamping pieces831, and the clamping bulge3510inside the foot cap351is disengaged from the groove350in the tail end of the n-th supporting foot outwards and gets away from an opening of the groove rotatably at the same time. At this time, the clamping bulge3510inside the foot cap351is jacked a tail end port of the n-th supporting foot. At this time, the n-th supporting foot can easily move to any required position. When the n-th supporting foot moves to another position, the foot cap351is rotated again so that the clamping bulge3510inside the foot cap aligns to the opening of the groove350at the tail end of the n-th supporting foot. And then, the hand is loosened, and the clamping bulge3510inside the foot cap is in tight fit with the groove350in the tail end of the n-th supporting foot under the effect of the fastening spring82, so that long-time fixation at another position is realized.

Embodiment IV

On the structural basis of the portable tripod in the first embodiment, the portable tripod provided by the fourth embodiment also includes a locating hole guide system. The locating hole guide system is arranged in the supporting legs and the first to (n−1)-th supporting feet embedded into the supporting legs in sequence, and when the first to (n−1)-th supporting feet are stretched, the locating hole guide system respectively guides the locating shaft63to enter into the limit hole101and/or the limit hole301under the effect of the locating spring62. In the embodiment, the locating hole guide system can prevent the locating shaft63from deviating from the limit hole101and/or the limit hole301due to no alignment when the first to (n−1)-th supporting feet are stretched.

In one of further schemes, as shown inFIG.4,FIG.17D,FIG.18andFIG.19, the locating hole guide system includes groove plates72and bulge plates71. The groove plates72are respectively embedded and fixed into both sides of the tail end of the supporting leg1and both sides of the tail ends of the first to (n−2)-th supporting feet, and a groove of the groove plate72faces towards the connecting assembly2. The bulge plates71are respectively fixedly mounted on both sides of the bases61of the locating devices6in the first to (n−1)-th supporting feet, and a bulge of the bulge plate71faces towards the foot cap351. When the first to (n−1)-th supporting feet are stretched, the bulge plates71of the first to (n−1)-th supporting feet are respectively matched with the groove plates72of the first to (n−2)-th supporting feet and guide the corresponding locating shaft63to enter into the corresponding limit hole101and/or the limit hole301under the effect of the corresponding locating spring62. For example, when the first supporting foot is stretched, the bulge plate71of the first supporting foot is matched with the groove plate72of the supporting leg1and guides the locating shaft63of the first supporting foot to enter into the limit hole101of the supporting leg1under the effect of the locating spring62. When the second supporting foot is stretched, the bulge plate71of the second supporting foot is matched with the groove plate72of the first supporting foot and guides the locating shaft63of the second supporting foot to enter into the limit hole301of the first supporting foot under the effect of the locating spring62. The rest may be deduced by analogy.

In another further scheme, as shown inFIG.35, the locating hole guide system includes rail slots73. The rail slots73are respectively formed in both sides of the supporting leg1and both inner sides of the first to (n−2)-th supporting feet. One end of each of the rail slots73is respectively ended at the limit holes101in both sides of the tail end of the supporting leg and the limit holes301in both sides of the tail ends of the first to (n−2)-th supporting feet, and the other ends of the rail slots73are respectively ended at both sides of the head end of the supporting leg and both sides of the head ends of the first to (n−2)-th supporting feet. When the first to (n−1)-th supporting feet are stretched, the locating shafts of the first to (n−1)-th supporting feet reach and enter into the corresponding limit hole101and/or limit hole301under the guide of the rail slot73and the effect of the locating spring62. For example, When the first supporting foot is stretched, the locating shaft63of the first supporting foot reaches and enters into the limit holes101in both sides of the supporting leg1under the guide of the rail slot73and the effect of the locating spring62. When the second supporting foot is stretched, the locating shaft of the second supporting foot reaches and enters into the limit hole101of the first supporting foot under the guide of the rail slot73and the effect of the locating spring62. The rest may be deduced by analogy.

Of course, the locating hole guide system in the fourth embodiment may also be a combination of the two further schemes. That is, the locating hole guide system includes the two further schemes at the same time.

Embodiment V

On the structural basis of the portable tripod in the second embodiment, the portable tripod provided by the fifth embodiment also includes a locating hole guide system. The locating hole guide system is arranged in the supporting legs and the first to (n−1)-th supporting feet embedded into the supporting legs in sequence. When the first supporting foot is stretched, the locating hole guide system guides the locating shaft63to enter into the limit hole101under the effect of the locating spring62. In the embodiment, the locating hole guide system can prevent the locating shaft63from deviating from the limit hole101due to no alignment when the first supporting foot is stretched.

In one of further schemes, as shown inFIG.4andFIG.19, the locating hole guide system includes groove plates72and bulge plates71. The groove plates72are respectively embedded and fixed into both sides of the tail end of the supporting leg1, and a groove of the groove plate72faces towards the connecting assembly2. The bulge plates71are respectively fixedly mounted on both sides of the base61of the locating device6in the first supporting foot, and a bulge of the bulge plate72faces towards the foot cap351. When the first supporting foot is stretched, the bulge plate71of the first supporting foot is matched with the groove plate72of the supporting leg1and guides the corresponding locating shaft63to enter into the corresponding hole101under the effect of the locating spring62.

In another further scheme, as shown inFIG.35, the locating hole guide system includes rail slots73. The rail slots73are formed in both sides of the supporting leg1. One end of each of the rail slots73is respectively ended at the limit holes101in both sides of the tail end of the supporting leg1, and the other ends of the rail slots73are respectively ended at both sides of the head end of the supporting leg1. When the first supporting foot is stretched, the locating shaft of the first supporting foot reaches and enters into the corresponding limit hole101under the guide of the rail slot73and the effect of the locating spring62.

Of course, the locating hole guide system in the fifth embodiment may also be a combination of the two further schemes. That is, the locating hole guide system includes the two further schemes at the same time.