Adjustable damping mechanism, camera slide device and damping adjustment method

Abstract

The present invention belongs to the technical field of damping devices, and specifically relates to an adjustable damping mechanism, a camera slide rail device and a damping adjustment method, comprising a first connecting sleeve and a linkage shaft sleeved in the first connecting sleeve, the lower end of the linkage shaft being fixedly connected to the first connecting sleeve through a damping end cover, a limiting column being provided on the upper fixed sleeve of the linkage shaft, a second connecting sleeve being provided between the limiting column and the first connecting sleeve, and the second connecting sleeve and the first connecting sleeve being relatively movable in the vertical direction; a follow-up valve being provided between the first connecting sleeve and the linkage shaft, the follow-up valve being located directly below the second connecting sleeve, the upper end of the follow-up valve being abutted against the lower end of the limiting column for limiting, and the lower end of the follow-up valve being abutted against the damping end cover for limiting through an elastic member; a closed cavity being formed between the first connecting sleeve, the limiting column, the second connecting sleeve and the follow-up valve, and the closed cavity being filled with damping oil. The present invention obtains a damping effect that changes continuously after rotation by changing the contact area between the first connecting sleeve and the second connecting sleeve and the damping oil.

Description

Technical Field

[0001] The invention belongs to the technical field of damping devices, and in particular relates to an adjustable damping mechanism, a camera slide rail device and a damping adjustment method. Background Art

[0002] Micro-shift slides are commonly used shooting equipment for photography enthusiasts. Existing micro-shift slides mostly achieve bidirectional sliding through a double-layer slider, that is, the length of one slide is used to achieve twice the distance of the slide, which shortens the length of the slide and is more convenient for photography enthusiasts to carry. However, when the micro-shift slide is sliding, the stability and uniformity of the slider's sliding are a key factor affecting the shooting effect.

[0003] In the prior art, in order to achieve uniform sliding of the slider, a damping structure is set on the micro-shift rail. For example, one damping structure is to tighten the rail through the elasticity of the rubber wheel to increase the friction to control the speed. However, this damping structure hinders the movement flexibility of the rail and is prone to sudden derailment, "jumping" and other phenomena, affecting the shooting effect of the picture. There is also a damping structure, such as in patent CN207093684U, in which wool products are filled in the inner ring of the damping inner adjustment ring, and the height of the damping inner adjustment ring is controlled by rotating the damping outer adjustment ring, so that the damping coefficient is increased or decreased by squeezing the wool products and generating friction with the damping synchronous wheel; the above two damping mechanisms both adjust the damping size by squeezing to increase the contact force, the adjustable range of the damping is small, and the damping after squeezing is difficult to achieve a smooth damping effect.

[0004] Therefore, it is particularly necessary to develop a damping mechanism that can improve the stability and uniformity of the sliding of the slider. Summary of the invention

[0005] In order to solve the problems in the above-mentioned background technology, the present invention provides an adjustable damping mechanism, a camera slide rail device and a damping adjustment method, wherein the damping adjustment mechanism achieves a continuous and smooth damping effect by changing the contact area between the first connecting sleeve and the second connecting sleeve and the damping oil.

[0006] The first object of the present invention is to provide an adjustable damping mechanism, comprising a first connecting sleeve, and a linkage shaft sleeved in the first connecting sleeve and fixedly connected to the first connecting sleeve, wherein:

[0007] The lower end of the linkage shaft is fixedly connected to the first connecting sleeve through a damping end cover, the upper end fixing sleeve of the linkage shaft is provided with a limiting column, a second connecting sleeve is provided between the limiting column and the first connecting sleeve, and the second connecting sleeve and the first connecting sleeve can move relative to each other in the vertical direction;

[0008] A follow valve is provided between the first connecting sleeve and the linkage shaft. The follow valve is located directly below the second connecting sleeve. The upper end of the follow valve is in contact and limited with the lower end of the limit post, and the lower end of the follow valve is in contact and limited with the damping end cover through an elastic member.

[0009] A sealed cavity is formed among the first connecting sleeve, the limit post, the second connecting sleeve, and the follow valve, and the sealed cavity is filled with damping oil.

[0010] Further, the follow valve includes a damping plug sleeved on the linkage shaft. The damping plug is in an annular structure. At least one first groove is provided on the inner side of the damping plug, and at least one second groove is provided on the outer side of the damping plug. O-ring seals are installed in both the first groove and the second groove, and the damping plug is hermetically connected to the first connecting sleeve and the linkage shaft through the O-ring seals on both sides of the damping plug.

[0011] Further, at least one first C-shaped groove is provided on the inner side of the upper end of the first connecting sleeve, and at least one second C-shaped groove opposite to the first C-shaped groove is provided on the outer side of the limit post. O-ring seals are provided in both the first C-shaped groove and the second C-shaped groove, and the second connecting sleeve is hermetically connected to the first connecting sleeve and the limit post through the O-ring seals on both sides respectively.

[0012] In one technical solution, the limit post and the linkage shaft are integrally formed, and the linkage shaft is detachably and fixedly connected to the damping end cover.

[0013] In other technical solutions, the limit post and the linkage shaft are detachably and fixedly connected, and the linkage shaft and the damping end cover are integrally formed.

[0014] Further, it further includes a damping base sleeved on the outer perimeters of the first connecting sleeve and the second connecting sleeve. The first connecting sleeve is rotationally connected to the damping base through a bearing, and the second connecting sleeve moves up and down relative to the damping base.

[0015] Further, the second connecting sleeve includes a lifting portion and a positioning portion fixedly provided at the upper end of the lifting portion. The outer side surface of the positioning portion is in up-and-down moving connection with the inner side surface of the damping base. The lower end surface of the positioning portion is arranged opposite to the upper end surface of the first connecting sleeve. When the damping force of the first connecting sleeve and / or the second connecting sleeve is the largest, the lower end surface of the positioning portion abuts against the upper end surface of the first connecting sleeve.

[0016] Further, the second connecting sleeve is driven to move up and down by a driving member. The driving member is fixedly connected to the second connecting sleeve, and the second connecting sleeve is moved up and down by pulling out or pressing the driving member.

[0017] Further, a rotating member is fixedly connected to the lower end of the damping end cover and / or a rotating member is fixedly connected to the upper end of the second connecting sleeve.

[0018] The second object of the present invention is to provide a camera slide device, comprising any one of the above-mentioned adjustable damping mechanisms. By using the adjustable damping mechanism on the camera slide device, the sliding of the connecting member on the camera slide device can achieve a continuous and smooth damping effect.

[0019] A third object of the present invention is to provide a method for damping adjustment, comprising the following steps:

[0020] When the damping force of the rotation of the first connecting sleeve and / or the second connecting sleeve needs to be increased, the second connecting sleeve is adjusted to move downward relative to the first connecting sleeve, and the damping oil pushes the follower valve to move downward during the descending process of the second connecting sleeve, and the contact surface between the damping oil and the inner side of the first connecting sleeve and the inner and outer sides of the second connecting sleeve increases, thereby increasing the damping;

[0021] When it is necessary to reduce the damping force of the rotation of the first connecting sleeve and / or the second connecting sleeve, the second connecting sleeve is adjusted to move upward relative to the first connecting sleeve. At the same time, the follower valve squeezes the damping oil upward under the dual action of atmospheric pressure and the elastic member. The contact area between the damping oil and the inner side of the first connecting sleeve and the inner and outer sides of the second connecting sleeve is reduced, and the damping is reduced.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] (1) In the present invention, the closed cavity formed between the first connecting sleeve, the limiting column, the second connecting sleeve and the follower valve is filled with damping oil. When the second connecting sleeve moves downward relative to the first connecting sleeve, the contact area between the second connecting sleeve and the damping oil increases and occupies part of the space, causing the damping oil to push the follower valve to move downward, thereby increasing the contact area between the first connecting sleeve and the second connecting sleeve and the damping oil. At this time, when at least one of the first connecting sleeve and the second connecting sleeve rotates, the resistance to the damping oil will increase. At the same time, due to the downward movement of the follower valve, the pressure in the space where the elastic member is located increases, and the elastic member is also It is in a compressed state; when the second connecting sleeve moves upward relative to the first connecting sleeve, the follower valve squeezes the damping oil upward under the dual action of atmospheric pressure and the elastic member, and the contact area between the damping oil and the first connecting sleeve and the second connecting sleeve is reduced. At this time, when at least one of the first connecting sleeve and the second connecting sleeve rotates, the resistance of the damping oil will be reduced; it can be seen that when the second connecting sleeve is pushed forward or pulled out relative to the first connecting sleeve, the contact area between the first connecting sleeve and the second connecting sleeve and the damping oil will change, and there will be sufficient contact with the damping oil, thereby obtaining a damping effect that continuously changes after rotation.

[0024] (2) The upper end of the follow valve of the present invention abuts against the limit post, and the lower end abuts against the damping end cover through an elastic member. When it is necessary to increase the resistance, the second connecting sleeve drives the damping oil to squeeze the follow valve downward, and the follow valve then squeezes the elastic member downward, causing the elastic member to be in a compressed state. At the same time, since the pressure in the space where the elastic member is located increases during the downward movement of the second connecting sleeve; when it is necessary to reduce the damping force, the second connecting sleeve moves upward. In order to keep the damping oil always filling the closed space, the follow valve moves upward under the dual action of the atmospheric pressure and the elastic member to ensure that the damping oil always fills the closed space; the setting of the follow valve enables a larger damping adjustment range and a better damping effect.

[0025] (3) By using this adjustable damping mechanism on the camera slide rail device, the present invention enables the sliding of the connecting members on the camera slide rail device to achieve a continuous and smooth damping effect, and the quality of the shooting finished product will not be affected by the damping effect during the camera shooting process. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0027] Figure 1 It is the overall structure diagram of the adjustable damping mechanism of the present invention;

[0028] Figure 2 It is the cross-sectional view of the adjustable damping mechanism of the present invention;

[0029] Figure 3 It is the damping plug structure diagram of the adjustable damping mechanism of the present invention;

[0030] Figure 4 It is the second connecting sleeve structure diagram of the adjustable damping mechanism of the present invention;

[0031] Figure 5 It is the damping base structure diagram of the adjustable damping mechanism of the present invention;

[0032] Wherein: 1 - first connecting sleeve, 11 - first C-shaped groove, 12 - first stepped shaft, 2 - linkage shaft, 3 - limit post, 31 - second C-shaped groove, 4 - second connecting sleeve, 41 - lifting part, 42 - positioning part, 5 - follow valve, 51 - damping plug, 511 - first groove, 512 - second groove, 52 - O-ring, 53 - elastic member, 6 - damping oil, 7 - damping end cover, 8 - damping base, 81 - first stepped hole, 82 - second stepped hole, 83 - third stepped hole, 84 - bearing, 9 - driving member, 91 - annular flange, 10 - synchronous pulley. DETAILED DESCRIPTION

[0033] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the protection scope of the present invention.

[0034] The following is combined with Figure 1 To Attachment Figure 5 The present invention is described in detail with reference to specific embodiments.

[0035] like Figure 1-5 As shown, the present invention provides an adjustable damping mechanism, comprising a first connecting sleeve 1, and a linkage shaft 2 sleeved in the first connecting sleeve 1 and fixedly connected to the first connecting sleeve 1, wherein: the lower end of the linkage shaft 2 is fixedly connected to the first connecting sleeve 1 through a damping end cover 7, the upper end of the linkage shaft 2 is fixedly sleeved with a limiting column 3, a second connecting sleeve 4 is provided between the limiting column 3 and the first connecting sleeve 1, and the two sides of the second connecting sleeve 4 are respectively sealed and connected to the limiting column 3 and the first connecting sleeve 1, and the second connecting sleeve 4 and the first connecting sleeve 1 are sealed and connected to the limiting column 3 and the first connecting sleeve 1. The connecting sleeve 1 can move relatively in the vertical direction; a follow-up valve 5 is provided between the first connecting sleeve 1 and the linkage shaft 2, and the follow-up valve 5 is sealedly connected to the first connecting sleeve 1 and the linkage shaft 2 respectively, and the follow-up valve 5 is located directly below the second connecting sleeve 4, and the upper end of the follow-up valve 5 is abutted against the lower end of the limit column 3 for limit, and the lower end of the follow-up valve 5 is abutted against the damping end cover 7 through the elastic member 53 for limit; a closed cavity is formed between the first connecting sleeve 1, the limit column 3, the second connecting sleeve 4, and the follow-up valve 5, and the closed cavity is filled with damping oil 6. The present invention does not limit the specific structure of the follow-up valve 5, as long as it can achieve a sealed connection with the linkage shaft 2 and the first connecting sleeve 1, and can be flexibly moved up and down, it belongs to the protection scope of the present invention.

[0036] It should be noted that the closed cavity of the present invention is annular, and the volume of the closed cavity is the same as the volume of the damping oil 6. Under repeated working conditions, the damping oil 6 can always keep filling the entire closed cavity, and the space where the elastic member 53 is located is also a sealed space; the second connecting sleeve 4 and the first connecting sleeve 1 can move up and down relative to each other in the closed cavity. When the second connecting sleeve 4 moves downward relative to the first connecting sleeve 1, the contact area between the second connecting sleeve 4 and the damping oil 6 increases, and also occupies part of the space, causing the damping oil 6 to squeeze the follower valve 5 downward and force the follower valve 5 to move downward. At this time, the contact area between the first connecting sleeve 1 and the damping oil 6 is also increased. When at least one of the first connecting sleeve 1 and the second connecting sleeve 4 rotates, the resistance of the damping oil 6 will increase. Due to the downward movement of the follower valve 5, the elastic member 5 3 increases; when the second connecting sleeve 4 moves upward relative to the first connecting sleeve 1, the contact area between the second connecting sleeve 4 and the damping oil 6 decreases, and at the same time, part of the space is also given up. The follower valve 5 squeezes the damping oil 6 upward under the action of atmospheric pressure and the dual action of the elastic member 53. At this time, the contact area between the first connecting sleeve 1 and the damping oil 6 is also reduced. When at least one of the first connecting sleeve 1 and the second connecting sleeve 4 rotates, the resistance of the damping oil 6 will also be reduced accordingly. In the present invention, the rotating components, the second connecting sleeve 4 and / or the first connecting sleeve 1, have sufficient contact area with the damping oil 6, so as to obtain a damping effect that changes continuously after rotation, and the setting of the follower valve 5 enables the second connecting sleeve 4 to be smoothly pushed in and pulled out relative to the first connecting sleeve 1, so that the adjustment range of the damping is larger.

[0037] The damping adjustment range of the damping adjustment mechanism of the present invention can be designed according to the actual application product. The size of the specific adjustment range is determined by the limit range of the downward movement of the second connecting sleeve 4 relative to the first connecting sleeve 1, that is, the larger the contact area between the second connecting sleeve 4 and the damping oil 6, the larger the damping adjustable range, and the smaller the contact area, the smaller the damping adjustable range.

[0038] Specifically, the follower valve 5 includes a damping plug 51 mounted on the linkage shaft 2, the damping plug 51 is annular in structure, a first groove 511 is arranged on the inner side of the damping plug 51, a second groove 512 is arranged on the outer side of the damping plug 51, and O-rings 52 are installed in both the first groove 511 and the second groove 512, and the O-rings 52 on both sides realize the sealing connection between the follower valve 5 and the first connecting sleeve 1 and the linkage shaft 2.

[0039] As a preferred embodiment, the follower valve 5 includes a damping plug 51 sleeved on the linkage shaft 2. The damping plug 51 has an annular structure. At least two first grooves 511 are arranged at intervals up and down on the inner side of the damping plug 51, and at least two second grooves 512 are arranged at intervals up and down on the outer side of the damping plug 51. O-ring seals 52 are installed in both the first grooves 511 and the second grooves 512. The setting of the O-ring seals 52 makes the connection between the follower valve 5 and the first connecting sleeve 1 and the linkage shaft 2 more sealed. The quality of the sealing performance directly affects the service life of the damping mechanism and the damping effect.

[0040] As a preferred embodiment, the follower valve 5 includes a damping plug 51 sleeved on the linkage shaft 2. The longitudinal section of the damping plug 51 is in a king shape. O-ring seals 52 are arranged in the grooves on the inner and outer sides of the king shape. The damping plug 51 is hermetically connected to the first connecting sleeve 1 and the linkage shaft 2 through the O-ring seals 52 on both sides of the damping plug. From the structure of the damping plug 51, it can be seen that there are two O-ring seals 52 on one side of the linkage shaft 2 and also two O-ring seals 52 on one side of the first connecting sleeve 1. When the expected sealing effect is achieved, the processing difficulty of the damping plug structure is a factor that needs to be considered first. The greater the processing difficulty, the higher the cost. Those skilled in the art can design and process according to the actual working conditions.

[0041] Specifically, a first C-shaped groove is provided on the inner side of the upper end of the first connecting sleeve 1, and a second C-shaped groove opposite to the first C-shaped groove is provided on the outer side of the limiting post 3. O-ring seals 52 are arranged in both the first C-shaped groove and the second C-shaped groove. The second connecting sleeve 4 is hermetically connected to the first connecting sleeve 1 and the limiting post 3 respectively through the O-ring seals 52 on both sides.

[0042] As a preferred embodiment, at least two first C-shaped grooves are arranged at intervals up and down on the inner side of the upper end of the first connecting sleeve 1, and two second C-shaped grooves opposite to the first C-shaped grooves are provided on the outer side of the limiting post. O-ring seals 52 are arranged in both the first C-shaped groove and the second C-shaped groove. The second connecting sleeve 4 is hermetically connected to the first connecting sleeve 1 and the limiting post 3 respectively through the O-ring seals 52 on both sides. Of course, when the expected sealing effect is achieved, the processing difficulty of the limiting post 3 and the first connecting sleeve 1 is a factor that needs to be considered. The greater the processing difficulty, the higher the cost. Therefore, those skilled in the art can design and process according to the actual working conditions.

[0043] Specifically, as a preferred embodiment, the limiting column 3 and the linkage shaft 2 are integrally formed, and the linkage shaft 2 is detachably fixedly connected to the damping end cover 7. Optionally, the lower end of the linkage shaft 2 is threadedly connected to the damping end cover 7 or detachably fixedly connected via a fixing member. When installing the damping mechanism, first, the follower valve 5 and the elastic member 53 are sequentially mounted from the lower end of the linkage shaft 2, and then the first connecting sleeve 1 is fixedly connected to the linkage shaft 2 via the damping end cover 7, and the second connecting sleeve 4 is inserted between the limiting column 3 and the first connecting sleeve 1.

[0044] Specifically, as a preferred embodiment, the limit column 3 is detachably fixedly connected to the linkage shaft 2. Optionally, the limit column 3 is provided with an internal thread, and the upper end of the linkage shaft 2 is provided with an external thread. The limit column 3 is threadedly connected to the linkage shaft 2; the linkage shaft 2 is integrally formed with the damping end cover 7. When installing the damping mechanism, the damping end cover 7 is first fixedly connected to the first connecting sleeve 1, and then the elastic member 53, the follower valve 5 and the limit column 3 are sequentially installed from the upper end of the linkage shaft 2 downward, and finally the second connecting sleeve 4 is inserted between the limit column 3 and the first connecting sleeve 1.

[0045] Specifically, in a preferred embodiment, a damping base 8 is further included which is sleeved on the outer periphery of the first connecting sleeve 1. The rotating component of the damping mechanism of the present invention is the first connecting sleeve 1, and the first connecting sleeve 1 is rotatably connected to the damping base 8 through a bearing 84. The damping base 8 is provided with a first stepped hole 81, a second stepped hole 82, and a third stepped hole 83 from bottom to top, and a first stepped shaft 12 is provided on the outer side of the first connecting sleeve 1. The upper end of the bearing 84 abuts against the limiting surface at the upper end of the first stepped hole 81, and the lower end of the bearing 84 abuts against the shaft shoulder of the first stepped shaft 12, so that the first connecting sleeve 1 can rotate relative to the damping base 8.

[0046] Specifically, the second connecting sleeve 4 includes a lifting portion 41 and a positioning portion 42 fixedly arranged at the upper end of the lifting portion 41, the positioning portion 42 is arranged in the third stepped hole 83 on the damping base 8, the outer side surface of the positioning portion 42 is connected to the inner side surface of the third stepped hole 83 for up and down movement, the lower end surface of the positioning portion 42 is arranged opposite to the upper end surface of the first connecting sleeve 1, and when the damping force of the first connecting sleeve 1 and the second connecting sleeve 4 is the largest, the lower end surface of the positioning portion 42 abuts against the upper end surface of the first connecting sleeve 1.

[0047] As a preferred embodiment, the third step hole 83 of the damping base 8 is a strip-shaped step hole, and the shape of the positioning portion 42 is adapted to the shape of the strip-shaped step hole. The above arrangement enables the positioning portion 42 to only move up and down in the third step hole 83 but not to rotate relatively. At this time, the first connecting sleeve 1 is used as a rotating member to connect to the external rotating member.

[0048] As a preferred embodiment, the second connecting sleeve 4 is driven by the driving member 9 to move up and down, and the driving member 9 is fixedly connected to the second connecting sleeve 4. Pressing the driving member 9 causes the second connecting sleeve 4 to move up and down, thereby adjusting the damping force. The fixing method of the driving member 9 and the second connecting sleeve 4 is not limited. Optionally, the upper end of the second connecting sleeve 4 is provided with an internal thread, and the lower end of the driving member 9 is provided with an external thread, and the fixed connection is achieved by the cooperation of the internal thread and the external thread; the driving member 9 is provided with an annular flange 91 circumferentially above the external thread, and the annular flange 91 is arranged in contact with the upper end surface of the second connecting sleeve 4. Pressing the driving member 9 can drive the second connecting sleeve 4 to move downward, and pulling out the driving member 9 upward can also drive the second connecting sleeve 4 to move upward. Of course, the present invention does not limit the specific mechanism and driving method of the driving member. Those skilled in the art can also select an electrically controlled driving method according to their needs, which all belong to the protection scope of the present invention.

[0049] As a preferred embodiment, a rotating member is fixedly connected to the lower end of the damping end cover 7. Optionally, the rotating member is a synchronous wheel 10, and the connection with the external load member is achieved through the synchronous wheel 10.

[0050] It can be imagined that when the second connecting sleeve 4 is used as a rotating member, the connection method between the second connecting sleeve 4 and the damping base 8 can be designed with reference to the connection method between the first connecting sleeve 1 and the damping base 8, and the present invention does not make any specific limitation.

[0051] The present invention also provides a camera slide device, comprising any one of the above-mentioned adjustable damping mechanisms. The damping adjustment mechanism of the invention is located at both ends of the camera slide device in the length direction, the rotating member of the adjustable damping mechanism is a synchronous wheel fixedly connected to the lower end of the damping end cover, the synchronous wheels on both sides of the camera slide device are equipped with synchronous belts, and the synchronous belts are fixed with connecting components. The present invention uses the adjustable damping mechanism on the camera slide device to achieve a continuous and smooth damping effect when the connecting components on the camera slide device slide.

[0052] The present invention also provides a damping adjustment method, comprising the following steps:

[0053] When it is necessary to increase the damping force of the rotation of the first connecting sleeve 1 and / or the second connecting sleeve 4, the second connecting sleeve 4 is adjusted to move downward relative to the first connecting sleeve 1, and the damping oil 6 pushes the follower valve 5 to move downward during the descending process of the second connecting sleeve 4, and the contact surface between the damping oil 6 and the inner side of the first connecting sleeve 1 and the inner and outer sides of the second connecting sleeve 4 increases, and the damping increases;

[0054] When it is necessary to reduce the damping force of the rotation of the first connecting sleeve 1 and / or the second connecting sleeve 4, the second connecting sleeve 4 is adjusted to move upward relative to the first connecting sleeve 1. At the same time, the follower valve 5 squeezes the damping oil 6 upward under the dual action of atmospheric pressure and the elastic member 53. The contact area between the damping oil 6 and the inner side of the first connecting sleeve 1 and the inner and outer sides of the second connecting sleeve 4 is reduced, and the damping is reduced.

[0055] The present invention realizes the damping effect that changes continuously after rotation by adjusting the change of the contact area between the first connecting sleeve 1 and the second connecting sleeve 4 and the damping oil 6. The adjustable range of the damping is large and the damping effect is good.

[0056] The present invention is further described above with the aid of specific embodiments. However, it should be understood that the specific description here should not be construed as limiting the essence and scope of the present invention. Various modifications made to the above embodiments by ordinary technicians in the field after reading this specification are all within the scope of protection of the present invention.

Claims

1. An adjustable damping mechanism, characterized in that: It includes a first connecting sleeve and a linkage shaft sleeved in the first connecting sleeve and fixedly connected to the first connecting sleeve, where: The lower end of the linkage shaft is fixedly connected to the first connecting sleeve through a damping end cover. A limiting post is sleeved on the upper end of the linkage shaft. A second connecting sleeve is provided between the limiting post and the first connecting sleeve, and the second connecting sleeve and the first connecting sleeve can move relatively in the vertical direction; A follow valve is provided between the first connecting sleeve and the linkage shaft. The follow valve is located directly below the second connecting sleeve. The upper end of the follow valve is in contact and limited with the lower end of the limiting post, and the lower end of the follow valve is in contact and limited with the damping end cover through an elastic member; A sealed cavity is formed among the first connecting sleeve, the limiting post, the second connecting sleeve, and the follow valve, and the sealed cavity is filled with damping oil.

2. The adjustable damping mechanism according to claim 1, characterized in that: The follow valve includes a damping plug sleeved on the linkage shaft. The damping plug has an annular structure. At least one first groove is provided on the inner side of the damping plug, and at least one second groove is provided on the outer side of the damping plug. O-ring seals are installed in both the first groove and the second groove, and the damping plug is hermetically connected to the first connecting sleeve and the linkage shaft through the O-ring seals on both sides of the damping plug.

3. The adjustable damping mechanism according to claim 1, characterized in that: At least one first C-shaped groove is provided on the inner side of the upper end of the first connecting sleeve. At least one second C-shaped groove opposite to the first C-shaped groove is provided on the outer side of the limiting post. O-ring seals are provided in both the first C-shaped groove and the second C-shaped groove, and the second connecting sleeve is hermetically connected to the first connecting sleeve and the limiting post through the O-ring seals on both sides respectively.

4. The adjustable damping mechanism according to claim 1, characterized in that: The limiting post and the linkage shaft are integrally formed, and the linkage shaft is detachably and fixedly connected to the damping end cover.

5. The adjustable damping mechanism according to claim 1, characterized in that: The limiting post and the linkage shaft are detachably and fixedly connected, and the linkage shaft and the damping end cover are integrally formed.

6. The adjustable damping mechanism according to claim 1, characterized in that: It further includes a damping base sleeved on the outer peripheries of the first connecting sleeve and the second connecting sleeve. The first connecting sleeve is rotatably connected to the damping base through a bearing, and the second connecting sleeve moves up and down relative to the damping base.

7. The adjustable damping mechanism according to claim 6, characterized in that: The second connecting sleeve includes a lifting portion and a positioning portion fixedly provided at the upper end of the lifting portion. The outer side surface of the positioning portion is connected to move up and down with the inner side surface of the damping base. The lower end surface of the positioning portion is arranged opposite to the upper end surface of the first connecting sleeve. When the damping force of the first connecting sleeve and / or the second connecting sleeve is the largest, the lower end surface of the positioning portion abuts against the upper end surface of the first connecting sleeve.

8. The adjustable damping mechanism according to claim 1, characterized in that: The second connecting sleeve is driven to move up and down by a driving member. The driving member is fixedly connected to the second connecting sleeve. The driving member is pulled out or pressed to make the second connecting sleeve move up and down.

9. A camera slide device, characterized in that: It includes the adjustable damping mechanism according to any one of claims 1-8.

10. A method for damping adjustment using the adjustable damping mechanism according to any one of claims 1 to 8, characterized in that: It includes the following steps: When it is necessary to increase the damping force of the rotation of the first connecting sleeve and / or the second connecting sleeve, adjust the second connecting sleeve to move downward relative to the first connecting sleeve. The damping oil pushes the follow valve to move downward during the downward movement of the second connecting sleeve, and the contact surfaces of the damping oil with the inner side of the first connecting sleeve and the inner and outer sides of the second connecting sleeve increase, resulting in an increase in damping; When it is necessary to reduce the damping force of the rotation of the first connecting sleeve and / or the second connecting sleeve, the second connecting sleeve is adjusted to move upward relative to the first connecting sleeve, and the follower valve squeezes the damping oil upward under the dual action of atmospheric pressure and the elastic member, and the contact area between the damping oil and the inner side of the first connecting sleeve and the inner and outer sides of the second connecting sleeve is reduced, thereby reducing the damping.

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