Support telescoping control mechanism

Abstract

The utility model discloses a telescopic control mechanism applied to a support, the support comprises a supporting assembly and a locking assembly, the supporting assembly comprises a first pipe and a second pipe, the first pipe and the second pipe are connected through the locking assembly, the telescopic control mechanism is characterized in that a first pipe gap is formed after the first pipe and the second pipe are connected in a sleeved mode, and a second pipe gap is formed after the second pipe is connected through the locking assembly. The locking assembly comprises a push rod and a locking piece which are connected with each other, the locking piece is connected with the push rod, the locking piece enters the first pipe gap to be locked, and the locking piece is pushed by the push rod to leave the first pipe gap to be unlocked. The locking and unlocking states of the locking piece are controlled through the push rod, and the structure is simple; the guiding structure is arranged to facilitate guiding of the locking piece to enter the locking position, the guiding matching structure is arranged to reduce unlocking resistance, and use is convenient; all the parts are fixedly connected and are not prone to falling off or being damaged, the service life of the support is prolonged, and accessories are convenient to maintain and replace.

Description

Technical Field

[0001] The utility model relates to a support telescopic control mechanism, in particular to a support telescopic control mechanism used for outdoor photography, measurement, shooting and the like. Background Art

[0002] In common brackets, the retractable support rod (tube) often has a relatively complex retractable control mechanism. The production and assembly process is relatively complicated, and the structure is relatively precise. Once individual parts are damaged or fail, the support rod or even the entire bracket will be scrapped.

[0003] A Chinese invention patent application with publication number CN116293329A discloses a photographic equipment assembly and a telescopic bracket thereof, wherein a locking assembly includes a housing, a drive assembly, a first base, a locking member and a second base. The locking assembly locks and unlocks the connections between the branches of the tube assembly, and with the cooperation of the linkage assembly, the height of the tube assembly can be adjusted as needed.

[0004] A Chinese utility model patent with publication number CN205956699U discloses a telescopic bracket, wherein the legs of the telescopic bracket include at least two telescopic rods and at least one locking device, wherein the telescopic rods are controlled to be telescoped or fixed by the locking device, and the locking device is an internal expansion type locking device, which is simpler than the aforementioned scheme. However, the locking device is composed of a ball-type internal expansion member independent of other components, and an internal expansion sleeve, a driven head, a fastener and other components that cooperate with the internal expansion member. Once the internal expansion member falls off or is damaged, the entire bracket cannot be repaired without disassembling it, which is obviously very costly for consumers, and there is also a defect that the entire bracket may be scrapped due to damage or failure of individual components. Summary of the invention

[0005] The technical problem to be solved by the utility model is to provide a durable support telescopic control mechanism which has a simple structure, is easy to produce and assemble, and is not easily damaged.

[0006] The technical solution adopted by the utility model to solve the above technical problems is:

[0007] A support telescopic control mechanism is applied to the support, the support includes a support assembly and a locking assembly, the support assembly includes a first tube and a second tube, the first tube and the second tube are connected through the locking assembly, and is characterized in that a first tube gap is formed after the first tube and the second tube are sleeved, the locking assembly includes a push rod and a locking piece connected to each other, the locking piece is connected to the push rod, the locking piece enters the first tube gap to lock, and the locking piece is pushed by the push rod to leave the first tube gap to unlock.

[0008] Further, the locking member includes a movable end, the movable end enters the first tube gap to lock, the movable end is connected to the push rod, and the movable end is pushed by the push rod to leave the first tube gap to unlock.

[0009] Furthermore, the locking member includes a fixed end, and the movable end is connected to the push rod via the fixed end.

[0010] Further, the locking assembly includes a guide structure, and the guide structure is located at the lower end of the first tube.

[0011] Furthermore, the guide structure has a guide surface, and a second tube gap is formed between the guide surface and the inner side surface of the second tube; the movable end enters the second tube gap under the guidance of the guide surface to be locked, and in the locked state, the movable end abuts against the guide surface and the inner side surface of the second tube.

[0012] Furthermore, the width of the second tube gap gradually increases along the axial direction, and the maximum thickness of the movable end is greater than the maximum width of the second tube gap.

[0013] Furthermore, the edge thickness of the movable end is smaller than the width of the first tube gap.

[0014] Furthermore, the guide surface includes a partial side surface or all side surfaces of a cone, a truncated cone, or a right prism.

[0015] Furthermore, a guiding matching structure is provided between the guiding surface and the movable end.

[0016] Furthermore, the number of the movable ends is 2 or more and they are distributed along the circumference of the locking member.

[0017] Furthermore, the locking assembly also includes a reinforcement member, and the reinforcement member is located on the outer surface of the locking member.

[0018] Furthermore, it also includes an automatic reset mechanism, which is directly or indirectly connected to the locking member and is used to restore the locking member to a locked state.

[0019] Compared with the prior art, the advantages of the utility model are that the locking and unlocking states of the locking piece are controlled by a push rod, and the structure is simple; a guide structure is provided to facilitate the locking piece to be guided into the locked position, and a guide matching structure is provided to reduce the unlocking resistance, and it is easy to use; the connection methods of various parts are mostly fixed connections, which are not easy to fall off or be damaged, thus extending the service life of the bracket and facilitating maintenance and replacement of accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a schematic diagram of the overall structure of a bracket in a locked state with the bracket telescopic control mechanism of the utility model;

[0021] Figure 2 for Figure 1 A cross-sectional view of a bracket;

[0022] Figure 3A for Figure 2 The enlarged view of the A part rotated to the horizontal direction;

[0023] Figure 3B When the utility model is in unlocked state, the corresponding Figure 3A A magnified image of

[0024] Figure 4 It is a schematic diagram of a partially exploded structure of the telescopic control mechanism of the support of the utility model;

[0025] Figure 5A , 5B 1 is a top view of two other embodiments of the locking member in the utility model;

[0026] Figure 6 for Figure 3B Enlarged view of part C;

[0027] Figure 7 for Figure 2 A magnified view of part B;

[0028] Figure 8 It is a schematic structural diagram of an embodiment of the utility model without a guide mechanism.

[0029] Description of reference numerals:

[0030] 100-housing, 101-upper part, 102-lower part, 103-rotating shaft, 104-connecting section, 120-driving assembly, 121-driving handle, 122-driving rod, 123-reset spring, 124-connecting rod;

[0031] 200-first tube, 201-outer side, 203-first tube gap, 210-lower end, 220-upper end;

[0032] 300 - second tube, 301 - inner side, 305 - gap between the second tube;

[0033] 500-locking assembly, 501-channel, 503-external contact surface, 504-inner contact surface, 510-push rod, 511-force-bearing end, 512-force-applying end, 520-guide member, 521-guide surface, 530-locking member, 531-movable end, 532-fixed end, 533-annular groove, 540-rubber ring. DETAILED DESCRIPTION

[0034] The following is a further detailed description of the present invention in conjunction with the accompanying drawings. Figure 3B Direction of arrow shown.

[0035] Reference Figure 1-8 The support extension and retraction control mechanism of the utility model is used for the support, and the support includes a housing 100, a driving assembly 120, a locking assembly 500 and a supporting assembly. The housing 100 includes an upper portion 101 and a lower portion 102 that are fixedly connected, the upper portion 101 is equipped with a driving assembly 120, and the lower portion 102 is equipped with a supporting assembly, and the driving assembly 120 controls the unlocking of the locking assembly 500. The supporting assembly includes a first tube 200 and a second tube 300, and the first tube 200 and the second tube 300 are connected by the locking assembly 500. After the first tube 200 and the second tube 300 are sleeved, the overlapping portion of the two forms a first tube gap 203, as shown in FIG. Figure 8 As shown, the locking assembly 500 enters the first tube gap 203 and is squeezed by the outer side surface 201 of the first tube 200 and the inner side surface 301 of the second tube 300 to generate friction, thereby preventing the relative movement between the first tube 200 and the second tube 300. When the locking assembly 500 is in the unlocked state, the first tube 200 and the second tube 300 can slide freely relative to each other. In one embodiment, the second tube 300 can be sleeved with a tube with a larger diameter to increase the height of the bracket.

[0036] The first tube 200 has an upper end 220 and a lower end 210. In one embodiment, the upper end 220 of the first tube 200 is rotatably connected to the lower portion 102 to facilitate the storage or deployment of the bracket; in some embodiments, the upper end 220 is rotatably connected to the lower portion 102 in a detachable or non-detachable manner. In one embodiment, the upper end 220 of the first tube 200 is rotatably connected to the lower portion 102 via a connecting portion, and the connecting portion continuously or temporarily maintains the upper end 220 within the reach of the driving assembly 120. When the upper end 220 is rotatably connected to the lower portion 102 in a non-detachable manner, the connecting portion includes a rotating shaft 103 and a connecting section 104 that are connected to each other, such as Figure 2 As shown; when the upper end 220 is rotatably connected to the lower part 102 in a detachable manner, the connection part is a snap-on assembly, a magnetic assembly or other temporary retaining structure that can temporarily retain the upper end 220 on the lower part 102. The connection part can also be a mounting position with multiple angles, which can be understood by those skilled in the art and will not be described in detail. In one embodiment, the upper end 220 and the lower part 102 can also be connected by a flexible rope or other connection mechanism that is easy to fold.

[0037] The locking assembly 500 includes a push rod 510 and a locking member 530 connected to each other. The push rod 510 has a force-receiving end 511 and a force-applying end 512. The force-receiving end 511 receives the external force applied by the driving assembly 120, so that the push rod 510 moves back and forth inside the first tube 200. The length of the push rod 510 is greater than the length of the first tube 200, so that the force-applying end 512 can extend from the lower end 210 of the first tube 200 without entering the first tube 200. The force-applying end 512 is fixedly connected or detachably connected to the locking member 530, or remains connected during the unlocking process.

[0038] The locking member 530 is fixedly connected or detachably connected to the force-applying end 512 of the push rod 510, such as threaded connection, clamping, bonding, welding, etc., or at least maintains a connection state during the unlocking process, such as magnetic connection, etc. The locking member 530 includes a movable end 531 and a fixed end 532. In one embodiment, the movable end 531 and the fixed end 532 of the locking member 530 are integrally formed, wherein the fixed end 532 is connected to the force-applying end 512 of the push rod 510 in the above manner; in another embodiment, the movable end 531 and the fixed end 532 are independently processed and then fixedly connected, wherein the fixed end 532 is detachably connected, fixedly connected, or integrally formed with the force-applying end 512 of the push rod 510.

[0039] In some embodiments, there are two or more movable ends 531, and they are distributed along the circumference of the locking member 530. Figure 5A , Figure 5B , Figure 4 As shown, there are 2, 3 and 4 movable ends 531 respectively, that is, 2 or more movable ends 531 are evenly distributed along the circumference of the locking member 530. In some embodiments, adjacent movable ends 531 are not connected to each other, and in some embodiments, adjacent movable ends 531 are movably connected or fixedly connected. In one embodiment, there is only one movable end 531, and the movable end 531 has a radial expansion and contraction structure or elastic deformation capability.

[0040] In some embodiments, Figure 3B As shown, the locking assembly 500 further includes a guide structure, which is located at the lower end 210 of the first tube 200. The outer side surface of the guide structure is a guide surface 521, and a second tube gap 305 is formed between the guide surface 521 and the inner side surface 301 of the second tube 300, and the width of the second tube gap 305 gradually increases along the axial direction; the second tube gap 305 is an axial extension of the first tube gap 203, and the maximum width of the second tube gap 305 is greater than the width of the first tube gap 203, so that the movable end 531 can enter the second tube gap 305 more easily.

[0041] In an embodiment with a guide structure, the diameter of the first tube 200 gradually shrinks at a position close to the opening of the lower end 210, that is, the inner diameter of the opening of the lower end 210 of the first tube 200 is smaller than the inner diameter of the first tube 200, and the position from the beginning of the shrinkage of the diameter to the opening of the lower end 210 is a guide portion, and the guide portion has a guide surface 521, and the maximum width of the second tube gap 305 is greater than the width of the first tube gap 203, so that the movable end 531 can enter the second tube gap 305 more easily; further, the inner diameter of the opening of the lower end 210 is slightly larger than the diameter of the push rod 510, so as to allow the push rod 510 to enter and exit the opening. In one embodiment, the guide portion can be integrally formed with the first tube 200.

[0042] In another embodiment with a guide structure, such as Figure 2 , Figure 3A , Figure 3B As shown, the guide structure is a guide member 520, and the lower end 210 of the first tube 200 is connected to the guide member 520, that is, the guide member 520 serves as an extension of the lower end 210 of the second tube 200. Figure 6 As shown, the guide member 520 has a channel 501, and the channel 501 allows the force-applying end 512 of the push rod 510 to enter and exit the guide member 520. Figure 3B As shown, ignoring the connection portion between the guide member 520 and the lower end 210, the diameter D of the outer cross section of the guide member 520 gradually decreases in the axial direction. The outer side surface of the guide member 520 is a guide surface 521, which is used to guide the movable end 531 to enter the second tube gap 305 more easily and to apply radial pressure to the movable end 531 of the locking member 530 to increase the friction between the outer contact surface 503 and the inner side surface 301 of the second tube 300, that is, the guide surface 521 can cooperate with the inner side surface 301 of the second tube 300 to clamp the movable end 531.

[0043] The movable end 531 has an outer contact surface 503 and an inner contact surface 504. In the locked state, the outer contact surface 503 abuts against the inner side surface 301 of the second tube 300, and the inner contact surface 504 abuts against the guide surface 521. The maximum thickness of the movable end 531 refers to the maximum thickness between the outer contact surface 503 and the inner contact surface 504, and the edge of the movable end 531 refers to the part of the movable end 531 that first enters the tube gap.

[0044] In embodiments without guide structures, such as Figure 8As shown, the edge thickness of the movable end 531 is less than or equal to the width of the first tube gap 203, so as to ensure that the movable end 531 can be smoothly inserted into the first tube gap 203, and at the same time, the maximum thickness of the movable end 531 is greater than the width of the first tube gap 203, so that the movable end 531 can be clamped in the first tube gap 203 to achieve the locking function. In the embodiment without the guide structure, in the locked state, the movable end 531 is locked only by the friction between it and the first tube 200 and the second tube 300, and the magnitude of the friction mainly depends on the degree of compression of the movable end 531 by the first tube 200 and the second tube 300 and the roughness of the contact surface, so the locking effect may not be ideal, and when unlocking, the same magnitude of external force is required to unlock, and both unlocking and locking are relatively laborious.

[0045] In the embodiment with the guide structure, since the width of the second tube gap 305 gradually increases along the axial direction, the maximum thickness of the movable end 531 is greater than the maximum width of the second tube gap 305, so that the movable end 531 can be clamped in the second tube gap 305 to achieve the locking function. Furthermore, the edge thickness of the movable end 531 is less than the width of the first tube gap 203, so that after the movable end 531 enters the second tube gap 305, it will not extend from the first tube gap 203, the locking assembly 500 is not exposed, and the appearance of the bracket is more concise and beautiful.

[0046] In an embodiment with a guiding structure such as a guide member 520, in one embodiment, the guiding surface 521 can be all or part of the side surface of a cone, a truncated cone, or a right prism; in other embodiments, the guiding surface 521 can also be a combination of a partial side surface of a partial cone, a truncated cone, or a right prism and other curved surfaces, that is, at least a portion of the guiding surface 521 is a partial side surface of a cone, a truncated cone, or a right prism.

[0047] In the locked state, the inner contact surface 504 and the guide surface 521 are in surface contact or line contact, and the guide surface 521 applies radial (outward) pressure to the inner contact surface 504. In some embodiments, there is a guiding matching structure between the guide surface 521 and the inner contact surface 504, such as mutually matching protrusions and grooves (or sliders and slide rails, etc.), so as to reduce the friction resistance during the unlocking process, so that the user can unlock with less force; in other embodiments, the guide surface 521 and / or the inner contact surface 504 can also be provided with a plurality of blind holes or through holes without affecting the aforementioned technical effects, so as to reduce the actual materials used for the corresponding components and save costs.

[0048] In some embodiments, in the locked state, the movable end 531 is forced to expand outward by the radially outward pressure from the guide 520, so that the outer contact surface 503 abuts against the inner side surface 301 of the second tube 300; during the unlocking process, the radially outward pressure from the guide 520 on the movable end 531 becomes smaller or zero, and the movable end 531 moves radially inward to recover, so that the friction between the outer contact surface 503 and the inner side surface 301 of the second tube 300 gradually becomes smaller or zero, thereby releasing the lock. The external force required for unlocking is much smaller than that of the embodiment without a guide structure, and it is more labor-saving when used.

[0049] The fixed end 532 of the locking member 530 is used to receive the thrust from the force-applying end 512 of the push rod 510, thereby driving the movable end 531 to gradually leave the first tube gap 203 and / or the second tube gap 305. At the same time, the guide surface 521 and the inner contact surface 504 also slide relatively until the outer contact surface 503 is out of contact with the inner side surface 301 of the second tube 300 or even the movable end 531 returns to a free state. At this time, the unlocking is completed, and the first tube 200 and the second tube 300 can slide freely relative to each other to adjust the relative position.

[0050] In one embodiment, a reinforcement is also included, and the reinforcement is used to ensure that the movable end 531 always maintains a tendency of radial (centripetal) movement during the forced deployment process, and to disperse the force at the connection between the movable end 531 and the fixed end 532 to prevent the connection from breaking due to excessive force. In one embodiment, the reinforcement is a rubber ring 540. In other embodiments, the reinforcement can also be other components with a certain deformation ability that can tighten the locking member 530, especially other components that can keep the multiple movable ends 531 in a tendency to gather centripetally. In one embodiment, the rubber ring 540 is located on the movable end 531 and close to the fixed end 532. In one embodiment, the movable end 531 has an annular groove 533 on the outside, and the rubber ring 540 is sleeved in the annular groove 533.

[0051] like Figure 1 , Figure 2 and Figure 7 As shown, the driving assembly 120 includes a driving handle 121, a driving rod 122 and a connecting rod 124. The driving handle 121 is rotatably connected to the upper portion 101, and the two ends of the connecting rod 124 are rotatably connected to the driving handle 121 and the driving rod 122 respectively. When unlocking is required, the driving handle 121 is pressed down, and the connecting rod 124 rotates and moves downward, driving the driving rod 122 to move downward, and the driving rod 122 applies downward pressure to the force-bearing end 511 of the push rod 510, thereby driving the locking assembly 500 to unlock.

[0052] In some embodiments, an automatic reset mechanism is also included, and the automatic reset mechanism can be combined with the push rod 510 or the locking member 530, for example, the push rod 510 or the locking member 530 is restored to the locked state through a reset spring. The automatic reset mechanism can also indirectly restore the locking member 530 to the locked state by restoring the drive assembly 120 to its original position (i.e., the position when it is locked), wherein the automatic reset mechanism can be arbitrarily combined with one of the drive handle 121, the drive rod 122 and the connecting rod 124, for example, the reset mechanism can be a torsion spring (not shown in the figure) connected to the drive handle 121, or a reset spring 123 sleeved with the drive rod 122, or a torsion spring (not shown in the figure) connected to the connecting rod 124, and the above-mentioned torsion spring can also be other rotation reset mechanisms, which can be thought of by those skilled in the art and will not be described in detail.

[0053] In one embodiment, the drive assembly 120 can also be other mechanisms that are manually or electrically driven, such as buttons, levers, knobs, elastic switches, and other alternatives that can be easily thought of by those skilled in the art. As long as the mechanism can achieve the downward pressing of the push rod 510, it is suitable for the present invention.

Claims

1. A support telescopic control mechanism, applied to a support, wherein the support comprises a support assembly and a locking assembly, wherein the support assembly comprises a first tube and a second tube, wherein the first tube and the second tube are connected via the locking assembly, and wherein: The first tube and the second tube are sleeved to form a first tube gap. The locking assembly includes a push rod and a locking piece that are connected to each other. The locking piece is connected to the push rod. The locking piece enters the first tube gap to lock. The locking piece is pushed by the push rod to leave the first tube gap to unlock.

2. The support extension and retraction control mechanism according to claim 1, characterized in that: The locking member includes a movable end, the movable end enters the first tube gap to lock, the movable end is connected to the push rod, and the movable end is pushed by the push rod to leave the first tube gap to unlock.

3. The support extension and retraction control mechanism according to claim 2, characterized in that: The locking member comprises a fixed end, and the movable end is connected to the push rod via the fixed end.

4. The support extension and retraction control mechanism according to claim 2, characterized in that: The locking assembly includes a guide structure located at a lower end of the first tube.

5. The support extension and retraction control mechanism according to claim 4, characterized in that: The guide structure has a guide surface, and a second tube gap is formed between the guide surface and the inner side surface of the second tube; the movable end enters the second tube gap under the guidance of the guide surface to be locked, and in the locked state, the movable end abuts against the guide surface and the inner side surface of the second tube.

6. The support extension and retraction control mechanism according to claim 5, characterized in that: The width of the second tube gap gradually increases along the axial direction, and the maximum thickness of the movable end is greater than the maximum width of the second tube gap.

7. The support extension and retraction control mechanism according to claim 5, characterized in that: The edge thickness of the movable end is smaller than the width of the first tube gap.

8. The support extension and retraction control mechanism according to claim 5, characterized in that: The guide surface includes a partial side surface or the entire side surface of a cone, a truncated cone, or a right prism.

9. The support extension and retraction control mechanism according to claim 5, characterized in that: A guiding matching structure is provided between the guiding surface and the movable end.

10. The support extension and retraction control mechanism according to claim 5, characterized in that: The number of the movable ends is 2 or more, and they are distributed along the circumference of the locking member.

11. The support extension and retraction control mechanism according to claim 5, characterized in that: The locking assembly further includes a reinforcement member located on an outer surface of the locking member.

12. The support extension and retraction control mechanism according to any one of claims 1 to 11, characterized in that: It also includes an automatic reset mechanism, which is directly or indirectly connected to the locking member and is used to restore the locking member to a locked state.

Images