# US 2025/0155071 A1 · Magnetic spherical tripod head and tripod head assembly

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- Number: US 2025/0155071 A1
- Document ID: US20250155071A1
- Status: Published application
- Kind: A1
- Application number: 18/775,432
- Filed: 2024-07-17
- Published: 2025-05-15
- Earliest claimed: 2023-11-09
- Assignees: Xiaoying Liang
- Inventors: XIAOYING LIANG; KWOK FAI LEUNG
- Web page: https://patentgrep.com/patent/US20250155071A1

## CPC

- F16M 11/14: with ball-joint (ball-jointed hinges F16C11/06 {; adjustable mountings employing universal joints for lighting devices F21V21/26 - F21V21/30})
- F16C 11/06: Ball-joints; Other joints having more than one degree of angular freedom, i.e. universal joints (universal joints in which flexibility is produced by means of pivots or sliding or rolling connecting parts F16D3/16)
- F16M 11/041: {Allowing quick release of the apparatus}
- F16M 11/16: Details concerning attachment of head-supporting legs, with or without actuation of locking members thereof
- F16M 11/2014: {around a vertical axis (F16M11/2035 takes precedence)}
- F16M 2200/022: by friction
- F16M: FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS

## Abstract

The present disclosure relates to a magnetic spherical tripod head and a tripod head assembly, which includes: a universal ball, comprising a ball head and a connecting handle; a limiting seat, comprising a ball seat for accommodating the ball head and a limiting piece movably abutting against the ball head and capable of limiting the rotation of the ball head in the ball seat; a magnetic piece, being fixed in the ball seat and attracting the ball head; a first fixing part and a second fixing part, being configured to detachably connect external accessories and respectively connected with the connecting handle and the limiting seat. The present disclosure overcomes the defect that the camera fixed on the existing spherical tripod head will quickly fall down and easily get damaged when the spherical tripod head is unlocked by the locking device.

## Claims

### Claim 1

A magnetic spherical tripod head, comprising:
a universal ball (1), comprising a ball head (11) and a connecting handle (12), a limiting seat (2), comprising a ball seat (21) for accommodating the ball head (11) and a limiting piece (22) movably abutting against the ball head (11) and capable of limiting the rotation of the ball head (11) in the ball seat (21), a magnetic piece (3), being fixed in the ball seat (21) and attracting the ball head (11),
a first fixing part (4) and a second fixing part (5), being configured to detachably connect external accessories and respectively connected with the connecting handle (12) and the limiting seat (2).

### Claim 2 (depends on 1)

The magnetic spherical tripod head according to claim 1, wherein the limiting piece (22) comprises a first clamping block (221) and a second clamping block (222) which are positioned in the ball seat (21) and can move relatively, and a bidirectional screw (223) with one end penetrating through the ball seat (21) and being in threaded connection with the first clamping block (221) and the second clamping block (222) at the same time, wherein when the bidirectional screw (223) is rotated, the spiral directions of the first clamping block (221) and the second clamping block (222) are opposite, and the first clamping block (221) and the second clamping block (222) movably abut against the ball head (11) under the rotation of the bidirectional screw (223).

### Claim 3 (depends on 2)

The magnetic spherical tripod head according to claim 2, wherein the limiting piece (22) further comprises an adjusting handle (224) arranged at the other end of the bidirectional screw (223).

### Claim 4 (depends on 1)

The magnetic spherical tripod head according to claim 1, wherein the magnetic piece (3) comprises an arc-shaped magnetic ring (31) and/or an annular magnetic ring (32) distributed around the periphery of the ball head (11), and both the arc-shaped magnetic ring (31) and the annular magnetic ring (32) are formed by arranging a plurality of magnetic blocks (311) in sequence, and one side of the arc-shaped magnetic ring (31) and the annular magnetic ring (32) facing the ball head (11) is matched with the spherical radian of the ball head (11).

### Claim 5 (depends on 2)

The magnetic spherical tripod head according to claim 2, wherein the ball seat (21) comprises an annular seat (211) surrounding the end of the ball head (11) and a cylindrical shell (212) surrounding the outer side of the annular seat (211), one end of the bidirectional screw (223) penetrates through the cylindrical shell (212) and is in threaded connection with the first clamping block (221) and the second clamping block (222) respectively, and the magnetic piece (3) is embedded on the annular seat (211) and located between the cylindrical shell (212) and the ball head (11).

### Claim 6 (depends on 5)

The magnetic spherical tripod head according to claim 5, wherein the bottom of the annular seat (211) is opened with a frustum hole (2110) with a gradually increasing diameter, wherein the first clamping block (221) and the second clamping block (222) move relatively within the outer diameter range of the bottom surface of the frustum hole (2110), and the peripheries of the upper end faces of the first clamping block (221) and the second clamping block (222) are provided with chamfers (2211) parallel to the inner inclined surface of the frustum hole (2110).

### Claim 7 (depends on 5)

The magnetic spherical tripod head according to claim 5, wherein the end of the cylindrical shell (212) is opened with at least one avoidance groove (2121), and the avoidance groove (2121) is located at one end of the connecting handle (12) extending out of the cylindrical shell (212).

### Claim 8 (depends on 1)

The magnetic spherical tripod head according to claim 1, wherein the first fixing part (4) comprises a fixing plate (41) fixed on the connecting handle (12), an adjusting plate (42) movably abutting against the fixing plate (41), and a first limiting rotary rod (43) with one end penetrating through the adjusting plate (42) and being in threaded connection with the fixing plate (41), wherein the upper end faces of the fixing plate (41) and the adjusting plate (42) form an inverted trapezoidal slot (40) with a small opening and a large bottom for clamping a quick release plate of a camera.

### Claim 9 (depends on 1)

The magnetic spherical tripod head according to claim 1, wherein the second fixing part (5) comprises a rotating pedestal (51) with one end inserted in the ball seat (21) and rotatably buckled with the lower end of the ball seat (21), and a second limiting rotary rod (52) with one end penetrating through the ball seat (21) and movably abutting against the rotating pedestal (51), wherein the second limiting rotary rod (52) is in threaded connection with the ball seat (21), and the bottom of the rotating pedestal (51) is further opened with a mounting screw hole (53) for threaded connection with a tripod.

### Claim 10

A tripod head assembly, comprising:
a tripod,
a universal ball (1), comprising a ball head (11) and a connecting handle (12),
a limiting seat (2), comprising a ball seat (21) for accommodating the ball head (11) and a limiting piece (22) movably abutting against the ball head (11) and capable of limiting the rotation of the ball head (11) in the ball seat (21),
a magnetic piece (3), being fixed in the ball seat (21) and attracting the ball head (11),
a first fixing part (4) and a second fixing part (5), being configured to detachably connect external accessories and respectively connected with the connecting handle (12) and the limiting seat (2), wherein the second fixing part (5) is detachably screwed with the tripod.

### Claim 11 (depends on 10)

The tripod head assembly according to claim 10, wherein the limiting piece (22) comprises a first clamping block (221) and a second clamping block (222) which are positioned in the ball seat (21) and can move relatively, and a bidirectional screw (223) with one end penetrating through the ball seat (21) and being in threaded connection with the first clamping block (221) and the second clamping block (222) at the same time, wherein when the bidirectional screw (223) is rotated, the spiral directions of the first clamping block (221) and the second clamping block (222) are opposite, and the first clamping block (221) and the second clamping block (222) movably abut against the ball head (11) under the rotation of the bidirectional screw (223).

### Claim 12 (depends on 11)

The tripod head assembly according to claim 11, wherein the limiting piece (22) further comprises an adjusting handle (224) arranged at the other end of the bidirectional screw (223).

### Claim 13 (depends on 10)

The tripod head assembly according to claim 10, wherein the magnetic piece (3) comprises an arc-shaped magnetic ring (31) and/or an annular magnetic ring (32) distributed around the periphery of the ball head (11), and both the arc-shaped magnetic ring (31) and the annular magnetic ring (32) are formed by arranging a plurality of magnetic blocks (311) in sequence, and one side of the arc-shaped magnetic ring (31) and the annular magnetic ring (32) facing the ball head (11) is matched with the spherical radian of the ball head (11).

### Claim 14 (depends on 11)

The tripod head assembly according to claim 11, wherein the ball seat (21) comprises an annular seat (211) surrounding the end of the ball head (11) and a cylindrical shell (212) surrounding the outer side of the annular seat (211), one end of the bidirectional screw (223) penetrates through the cylindrical shell (212) and is in threaded connection with the first clamping block (221) and the second clamping block (222) respectively, and the magnetic piece (3) is embedded on the annular seat (211) and located between the cylindrical shell (212) and the ball head (11).

### Claim 15 (depends on 14)

The tripod head assembly according to claim 14, wherein the bottom of the annular seat (211) is opened with a frustum hole (2110) with a gradually increasing diameter, wherein the first clamping block (221) and the second clamping block (222) move relatively within the outer diameter range of the bottom surface of the frustum hole (2110), and the peripheries of the upper end faces of the first clamping block (221) and the second clamping block (222) are provided with chamfers (2211) parallel to the inner inclined surface of the frustum hole (2110).

### Claim 16 (depends on 14)

The tripod head assembly according to claim 14, wherein the end of the cylindrical shell (212) is opened with at least one avoidance groove (2121), and the avoidance groove (2121) is located at one end of the connecting handle (12) extending out of the cylindrical shell (212).

### Claim 17 (depends on 10)

The tripod head assembly according to claim 10, wherein the first fixing part (4) comprises a fixing plate (41) fixed on the connecting handle (12), an adjusting plate (42) movably abutting against the fixing plate (41), and a first limiting rotary rod (43) with one end penetrating through the adjusting plate (42) and being in threaded connection with the fixing plate (41), wherein the upper end faces of the fixing plate (41) and the adjusting plate (42) form an inverted trapezoidal slot (40) with a small opening and a large bottom for clamping a quick release plate of a camera.

### Claim 18 (depends on 10)

The tripod head assembly according to claim 10, wherein the second fixing part (5) comprises a rotating pedestal (51) with one end inserted in the ball seat (21) and rotatably buckled with the lower end of the ball seat (21), and a second limiting rotary rod (52) with one end penetrating through the ball seat (21) and movably abutting against the rotating pedestal (51), wherein the second limiting rotary rod (52) is in threaded connection with the ball seat (21), and the bottom of the rotating pedestal (51) is further opened with a mounting screw hole (53) for threaded connection with a tripod.