Electronic control unlocking and locking control circuit of camera support

Abstract

The utility model discloses an electric control unlocking and locking control circuit of a camera support. The electric control unlocking and locking control circuit comprises an unlocking and locking switch, a first time relay, a second time relay, a first motor, a second motor and a third motor, when the unlocking and locking switch is in a first state, the first connecting end and the fourth connecting end are connected, and the fifth connecting end and the eighth connecting end are connected, so that the first motor, the second motor and the third motor are driven to rotate in the forward direction. Or, when the unlocking and locking switch is in the second state, the second connecting end and the third connecting end are connected, and the sixth connecting end and the seventh connecting end are connected, so that the first motor, the second motor and the third motor are driven to rotate reversely; by means of the structure, one-button type electric control unlocking and locking of the three telescopic foot pipes can be achieved, the operation convenience when the camera support is unfolded and folded is greatly improved, and the use requirement is met.

Description

Technical Field

[0001] The utility model relates to the field of photographic equipment, in particular to an electric control unlocking control circuit of a photographic bracket. Background Art

[0002] With the improvement of living standards, more and more people love photography. In order to pursue higher and more sophisticated still or motion photography and videography, they usually use brackets to support the shooting equipment. Existing photography brackets are generally divided into manual release, hydraulic automatic release and electronic automatic release. Among them:

[0003] 1. The manual unlocking is manually operated, but each telescopic leg needs to be manually unlocked once, which is inconvenient to operate;

[0004] 2. The hydraulic automatic unlocking method uses hydraulic drive to unlock each telescopic leg tube with one button. The hydraulic oil in the oil circuit is controlled by operating the button to generate the driving force for unlocking. However, its oil circuit structure is relatively complex and involves problems such as oil circuit sealing, which brings the disadvantages of high cost and poor product stability.

[0005] 3. The electronically controlled automatic unlocking uses a motor as a power source. For example, Chinese patent CN2022231247392 discloses a bracket with a three-button structure, that is, one button controls the unlocking of one leg. When fully unfolded, three buttons need to be pressed, which also causes certain inconveniences.

[0006] Therefore, an electric control unlocking control circuit of a photographic bracket is badly needed to solve the above problems. Utility Model Content

[0007] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides an electric control unlocking control circuit for a photographic stand.

[0008] An embodiment of the present invention solves the technical problem by adopting a technical solution: an electric control unlocking control circuit of a photographic stand, comprising an unlocking switch, a first time relay, a second time relay, a first motor, a second motor and a third motor;

[0009] The unlocking switch has a first connection terminal to an eighth connection terminal, the first connection terminal is connected to the positive electrode of the power supply and the sixth connection terminal, and the second connection terminal is connected to the negative electrode of the power supply and the fifth connection terminal;

[0010] One end of the coil of the first time relay is connected to the third connection end, the other end of the coil of the first time relay is connected to one end of the first motor, one end of the second motor, one end of the third motor, and one end of the normally closed contact of the second time relay, one end of the normally closed contact of the first time relay is respectively connected to the other end of the first motor, the other end of the second motor, the other end of the third motor, and one end of the coil of the second time relay, and the other end of the normally closed contact of the first time relay is connected to the seventh connection end;

[0011] The other end of the coil of the second time relay is connected to the fourth connection end, and the other end of the normally closed contact of the second time relay is connected to the eighth connection end;

[0012] When the unlocking switch is in the first state, the first connection end and the fourth connection end and the fifth connection end and the eighth connection end are connected to drive the first motor, the second motor and the third motor to rotate forward; or, when the unlocking switch is in the second state, the second connection end and the third connection end and the sixth connection end and the seventh connection end are connected to drive the first motor, the second motor and the third motor to rotate reversely.

[0013] As one of the preferred embodiments of the present invention, an electric unlocking control circuit for a photographic stand further includes a battery to constitute a power source.

[0014] As one of the preferred embodiments of the present invention, the battery is configured as a dry cell battery.

[0015] As one of the preferred embodiments of the present invention, the battery is configured as a rechargeable battery.

[0016] The beneficial effects of the present invention are as follows: an electrically controlled unlocking control circuit for a photographic bracket, comprising an unlocking switch, a first time relay, a second time relay, a first motor, a second motor and a third motor; the unlocking switch can connect the first connection end and the fourth connection end and the fifth connection end and the eighth connection end when in the first state, so as to drive the first motor, the second motor and the third motor to rotate forward; or, the unlocking switch can connect the second connection end and the third connection end and the sixth connection end and the seventh connection end when in the second state, so as to drive the first motor, the second motor and the third motor to rotate reversely; the above structure can realize one-button electrically controlled unlocking of the three telescopic legs, greatly improving the convenience of operation when the photographic bracket is unfolded and folded, and meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0018] Figure 1It is a structural diagram of a photographic stand with electronically controlled unlocking;

[0019] Figure 2 An exploded view of an electronically unlocked photographic stand;

[0020] Figure 3 A cross-sectional view of a photographic stand with electronically controlled unlocking;

[0021] Figure 4 for Figure 2 A partial enlarged view of area A in the middle;

[0022] Figure 5 for Figure 3 A partial enlarged view of the middle B area;

[0023] Figure 6 The following is a circuit schematic diagram of an electrically controlled unlocking control circuit for a photographic stand. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] In the description of this utility model, "above," "below," and "within" are understood to be exclusive of the number indicated, while "above," "below," and "within" are understood to be inclusive of the number indicated. The use of "first" and "second" is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, or implicitly specifying the number or order of the technical features indicated.

[0026] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0027] In this utility model, unless otherwise expressly defined, terms such as "disposed," "installed," and "connected" should be interpreted broadly. For example, they may refer to direct connection or indirect connection through an intermediate medium; fixed connection or detachable connection or integral molding; mechanical connection; internal communication between two components or interaction between two components. Those skilled in the art can reasonably determine the specific meanings of these terms in this utility model based on the specific content of the technical solution.

[0028] Reference Figures 1 to 6 A photographic stand with electrically controlled unlocking includes a three-cutting base 100 and a first telescopic leg 200, a second telescopic leg 300, and a third telescopic leg 400 operably connected to the three-cutting base 100, and further includes a first electrically driven unlocking mechanism 500, a second electrically driven unlocking mechanism 600, a third electrically driven unlocking mechanism 700, and an unlocking switch 110.

[0029] The first electrically driven unlocking mechanism 500 is mounted on the first telescopic leg 200, the second electrically driven unlocking mechanism 600 is mounted on the second telescopic leg 300, and the third electrically driven unlocking mechanism 700 is mounted on the third telescopic leg 400. These mechanisms are respectively used to control the first telescopic leg 200, the second telescopic leg 300, and the third telescopic leg 400 to enter an unlocked state and deploy, or to control the first telescopic leg 200, the second telescopic leg 300, and the third telescopic leg 400 to enter a locked state to maintain the deployed or retracted state.

[0030] The unlocking switch 110 is provided on the three-way cutter base 100 and is electrically connected to the first electric unlocking mechanism 500 , the second electric unlocking mechanism 600 and the third electric unlocking mechanism 700 .

[0031] 1) In the present invention, the switching of a photographic stand from a folded state to an unfolded state is used as an example for explanation. When in use, an unlocking instruction and a locking instruction are sent by operating the unlocking switch 110. When the unlocking switch 110 is pressed, an unlocking instruction is simultaneously sent to the first electric drive unlocking mechanism 500, the second electric drive unlocking mechanism 600, and the third electric drive unlocking mechanism 700, thereby simultaneously unlocking the telescopic joints of the first telescopic leg 200, the second telescopic leg 300, and the third telescopic leg 400, thereby causing each telescopic leg to automatically unfold under the action of gravity; when the photographic stand is unfolded, pressing the unlocking switch 110 again will simultaneously send a locking instruction to the first electric drive unlocking mechanism 500, the second electric drive unlocking mechanism 600, and the third electric drive unlocking mechanism 700, thereby simultaneously locking the telescopic joints of the first telescopic leg 200, the second telescopic leg 300, and the third telescopic leg 400, thereby maintaining the unfolded state.

[0032] 2)Reference Figure 3and Figure 5 In some embodiments, the first electric-driven unlocking mechanism 500 includes a first motor 510, a first transmission assembly 520, a first linkage rod 530, and a plurality of unlocking assemblies 540; the first motor 510 is mounted on the first telescopic leg 200; the first transmission assembly 520 is connected to the output shaft of the first motor 510; the first linkage rod 530 is connected to the first transmission assembly 520; the unlocking assembly 540 is connected between two adjacent tubes of the first telescopic leg 200 and is connected to the first linkage rod 530; the first motor 510 can drive the unlocking assembly 540 to release the restriction between the two adjacent tubes of the first telescopic leg 200 when rotating in the forward direction, or drive the unlocking assembly 540 to restrict the movement between the two adjacent tubes of the first telescopic leg 200 when rotating in the reverse direction.

[0033] In a further embodiment, the unlocking assembly 540 includes a drive ring 541, a movable seat 542, a limit seat 543, a reset member 544 and a plurality of pressure balls 545; the drive ring 541 is mounted on the first linkage rod 530, and is used for axial movement relative to the first linkage rod 530 when the first linkage rod 530 rotates; the movable seat 542 is mounted on the first linkage rod 530 and is spaced apart from the drive ring 541; the limit seat 543 is connected to the inner tube 200a between the two adjacent tube bodies and is provided with a pressure inclined surface 546 on the outer wall; the reset member 544 is in contact between the movable seat 542 and the limit seat 543; the pressure ball 545 is mounted on the movable seat 542 and is spaced apart from the pressure inclined surface 546 and the adjacent The outer tube 200b between the two tube bodies abuts; the driving ring 541 can push the movable seat 542 away from the limiting seat 543 when the first linkage rod 530 rotates forward, so that the pressing ball 545 releases the abutment against the pressing inclined surface 546 and the outer tube 200b between the two adjacent tube bodies, thereby releasing the restriction between the two adjacent tube bodies of the first telescopic leg 200; or, the driving ring 541 can move away from the limiting seat 543 when the first linkage rod 530 rotates reversely, so that the pressing ball 545 abuts against the pressing inclined surface 546 and the outer tube 200b between the two adjacent tube bodies when the reset member 544 pushes the movable seat 542 close to the limiting seat 543, thereby restricting the movement between the two adjacent tube bodies of the first telescopic leg 200.

[0034] The working principle of expansion and contraction is explained using the first telescopic leg 200 as an example. The first telescopic leg 200 includes a first tube body, a second tube body, a third tube body, and a fourth tube body, which are sequentially arranged from the outside to the inside. The first tube body serves as a fixed tube, and the second, third, and fourth tube bodies serve as telescopic tubes. The first and second tube bodies constitute a first-level telescopic joint, the second and third tube bodies constitute a second-level telescopic joint, and the third and fourth tube bodies constitute a third-level telescopic joint. The following explanation takes the first-level telescopic joint as an example, with the first tube body serving as the outer tube 200b and the second tube body serving as the inner tube 200a.

[0035] Specifically, when the first motor 510 receives the unlocking instruction from the unlocking switch 110, it will rotate forward, and drive the first linkage rod 530 to rotate after being transmitted by the first transmission assembly 520, and the driving ring 541 and the first linkage rod 630 realize the conversion between rotational motion and linear motion through the cooperation between the axially arranged ribs and rib grooves, that is, the rotational motion of the first linkage rod 530 is converted into the linear motion of the driving ring 541, and then the driving ring 541 moves toward the movable seat 542, and pushes the movable seat 542 to move upward (away from the limit seat 543), so that the movable seat 542 drives the pressing ball 545 thereon to move to the low position of the pressing inclined surface 546 (close to the limit seat 543), thereby releasing the contact with the pressing inclined surface 546 and the outer tube 200b between the two adjacent tube bodies. At this time, the inner tube 200a (the second tube body) can When the first telescopic leg 200 is in the closed position, the inner tube 200a (second tube body) is unable to move axially relative to the outer tube 200b (first tube body), thereby maintaining the expanded or retracted state of the first telescopic leg 200.

[0036] 3)Reference Figure 2-Figure 5 In some embodiments, the first transmission assembly 520 includes a worm 521 and a turbine 522 , wherein one end of the worm 521 is connected to the output shaft of the first motor 510 , and the turbine 522 is connected to the first linkage rod 530 and meshes with the other end of the worm 521 .

[0037] 4)Reference Figure 3 and Figure 5In some embodiments, a through slot 310 is provided on the first telescopic leg 200, one end of the through slot 310 is communicated with the outside, and the first transmission assembly 520 is arranged opposite to the other end of the through slot 310 or at least partially extends into the through slot 310; specifically, the other end of the through slot 310 is arranged opposite to the worm 521, or at least a portion of the worm 521 extends into the through slot 310, and an adjustment slot 320 is provided on the end of the worm 521 close to the through slot 310. The adjustment slot 320 can be a straight adjustment slot, a cross adjustment slot, or a hexagonal adjustment slot, etc. This arrangement can ensure that when the motor fails, the worm 521 can be manually operated with the help of a tool to achieve emergency unlocking; of course, in other embodiments, the worm 521 can also be extended to the outside through the through slot 310, and a knob can be provided on the worm 521, so that emergency unlocking can be achieved without the help of a tool.

[0038] 5)Reference Figure 3 and Figure 5 In some embodiments, the movable seat 542 includes an inner ring 542a and an outer ring 542b, the limiting seat 543 is inserted between the inner ring 542a and the outer ring 542b, the pressing ball 545 is installed on the outer ring 542b, and the reset member 544 is arranged between the inner wall of the limiting seat 543 and the outer wall of the inner ring 542a.

[0039] 6)Reference Figure 3 and Figure 5 In some embodiments, a first limiting ring 810 is provided at the lower end of the inner ring 542a, a second limiting ring 820 is provided at the upper end of the limiting seat 543, and the reset member 544 is abutted between the first limiting ring 810 and the second limiting ring 820; the reset member 544 can be limited without affecting the movement of the movable seat 542. Of course, the inner ring 542a and the outer ring 542b are split structures. During assembly, after assembling the inner ring 542a, the reset member 544 and the limiting seat 543, the outer ring 542b is abutted against the outer side of the limiting seat 543 and assembled with the inner ring 542a as a whole. The assembly method can be bolt connection, gluing, etc.

[0040] 7)Reference Figure 3 and Figure 5 In some embodiments, as a preferred embodiment of the reset member 544, the reset member 544 is configured as a spring.

[0041] 8)Reference Figure 1 、 Figure 2 and Figure 4In some embodiments, an electrically controlled unlocking photography stand further includes a side handle 900 mounted on the three-cutting base 100 and a battery 910 mounted on the side handle 900. The unlocking switch 110 is provided on the side handle 900. The battery 910 is electrically connected to the first electric drive unlocking mechanism 500, the second electric drive unlocking mechanism 600, the third electric drive unlocking mechanism 700, and the unlocking switch 110. The battery 910 is used to power the first electric drive unlocking mechanism 500, the second electric drive unlocking mechanism 600, and the third electric drive unlocking mechanism 700. Of course, power can also be supplied by an external power supply, such as connecting a power bank.

[0042] 9) In some embodiments, the battery 910 is connected to the first electric drive unlocking mechanism 500, the second electric drive unlocking mechanism 600 and the third electric drive unlocking mechanism 700 by a wired connection; in other embodiments, the three-cutting base 100 is provided with a first conductive part electrically connected to the first electric drive unlocking mechanism 500, the second electric drive unlocking mechanism 600 and the third electric drive unlocking mechanism 700, and the side handle 900 is provided with a second conductive part electrically connected to the battery 910 and the unlocking switch 110. The first conductive part can be electrically contacted with the second conductive part when the side handle 900 is installed on the three-cutting base 100.

[0043] 10)Reference Figures 1-6 The present invention further provides an electrically controlled unlocking control circuit for a photographic stand, comprising an unlocking switch 110, a first time relay 930, a second time relay 940, a first motor 510, a second motor 610, and a third motor 710. It should be noted that the structures of the second electrically driven unlocking mechanism 600 and the third electrically driven unlocking mechanism 700 are consistent with those of the first electrically driven unlocking mechanism 500, i.e., the second electrically driven unlocking mechanism 600 includes a second motor 610, and the third electrically driven unlocking mechanism 700 includes a third motor 710.

[0044] The unlocking switch 110 has a first connection terminal to an eighth connection terminal, the first connection terminal is connected to the positive electrode of the power supply and the sixth connection terminal, and the second connection terminal is connected to the negative electrode of the power supply and the fifth connection terminal;

[0045] One end of the coil of the first time relay 930 is connected to the third connection end, the other end of the coil of the first time relay 930 is connected to one end of the first motor 510, one end of the second motor 610, one end of the third motor 710, and one end of the normally closed contact of the second time relay 940, one end of the normally closed contact of the first time relay 930 is respectively connected to the other end of the first motor 510, the other end of the second motor 610, the other end of the third motor 710, and one end of the coil of the second time relay 940, and the other end of the normally closed contact of the first time relay 930 is connected to the seventh connection end;

[0046] The other end of the coil of the second time relay 940 is connected to the fourth connection end, and the other end of the normally closed contact of the second time relay 940 is connected to the eighth connection end.

[0047] Specifically, when the unlocking switch 110 sends an unlocking instruction (i.e., it is in the first state), the first connection end and the fourth connection end, as well as the fifth connection end and the eighth connection end, will be connected. The direction of the circuit is: the positive pole of the power supply--the first connection end--the fourth connection end--the coil of the second time relay 940--the other end of the first motor 510, the other end of the second motor 610, the other end of the third motor 710--one end of the first motor 510, one end of the second motor 610, one end of the third motor 710--the normally closed contact of the second time relay 940--the eighth connection end--the fifth connection end--the negative pole of the power supply, thereby forming a cycle to drive the first motor 510, the second motor 610 and the third motor 710 to rotate forward. When the unlocking switch 110 sends a locking command (i.e., it is in the second state), the second connection terminal and the third connection terminal and the sixth connection terminal and the seventh connection terminal are connected, and the direction of the circuit is: the positive pole of the power supply--the sixth connection terminal--the seventh connection terminal--the normally closed contact of the first time relay 930--the other end of the first motor 510, the other end of the second motor 610, the other end of the third motor 710--one end of the first motor 510, one end of the second motor 610, one end of the third motor 710--the coil of the first time relay 930--the third connection terminal--the second connection terminal--the negative pole of the power supply, thereby forming a cycle to drive the first motor 510, the second motor 610, and the third motor 710 to rotate in the opposite direction.

[0048] 11) In some embodiments, a battery 910 is further included to constitute a power source; as a first embodiment of the battery 910, the battery 910 is configured as a dry cell battery; as a second embodiment of the battery 910, the battery 910 is configured as a rechargeable battery.

[0049] 12) The advantage of the present invention is that the above structure can realize one-touch electric unlocking of the three telescopic legs, which greatly improves the convenience of operation when unfolding and folding the photographic stand and meets the use requirements.

[0050] Of course, the present invention is not limited to the above-mentioned embodiments. Those skilled in the art may make equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications and substitutions are all included in the scope defined by the claims of this application.

Claims

1. An electronically controlled unlocking control circuit for a photographic stand, characterized in that: It includes an unlocking switch (110), a first time relay (930), a second time relay (940), a first motor (510), a second motor (610), and a third motor (710); The unlocking switch (110) has a first connection terminal to an eighth connection terminal, the first connection terminal is connected to the positive electrode of the power supply and the sixth connection terminal, and the second connection terminal is connected to the negative electrode of the power supply and the fifth connection terminal; One end of the coil of the first time relay (930) is connected to the third connection end, the other end of the coil of the first time relay (930) is connected to one end of the first motor (510), one end of the second motor (610), one end of the third motor (710), and one end of the normally closed contact of the second time relay (940), one end of the normally closed contact of the first time relay (930) is respectively connected to the other end of the first motor (510), the other end of the second motor (610), the other end of the third motor (710), and one end of the coil of the second time relay (940), and the other end of the normally closed contact of the first time relay (930) is connected to the seventh connection end; The other end of the coil of the second time relay (940) is connected to the fourth connection end, and the other end of the normally closed contact of the second time relay (940) is connected to the eighth connection end; The unlocking switch (110) can connect the first connection end and the fourth connection end and connect the fifth connection end and the eighth connection end when it is in a first state, so as to drive the first motor (510), the second motor (610) and the third motor (710) to rotate in the forward direction; or, when the unlocking switch (110) is in a second state, it can connect the second connection end and the third connection end and connect the sixth connection end and the seventh connection end, so as to drive the first motor (510), the second motor (610) and the third motor (710) to rotate in the reverse direction.

2. The electronic unlocking control circuit of a photographic stand according to claim 1, characterized in that: A battery (910) is also included to constitute the power source.

3. The electronically controlled unlocking control circuit of a photographic stand according to claim 2, characterized in that: The battery (910) is configured as a dry cell battery.

4. The electronically controlled unlocking control circuit of a photographic stand according to claim 2, characterized in that: The battery (910) is configured as a rechargeable battery.

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