JP2018516387A - Knob structure and follow focus remote controller using this knob structure - Google Patents

Abstract

The present invention includes a fixed member 12, a rotary member 32 provided rotatably on the fixed member 12, and at least one movable member 34 provided movably between the fixed member 12 and the rotary member 32. A knob structure 100 is provided. The fixing member 12 includes a receiving portion 121, and the rotating member 32 is provided in the receiving portion 121. A first damper grease is provided between the at least one movable member 34 and the fixed member 12, and a second damper grease is provided between the at least one movable member and the rotating member 32. The magnitude of braking by the first damper grease and the second damper grease is different. The present invention further provides a follow focus remote controller 200 using the knob structure 100. The knob structure 100 has a relatively wide rotation braking adjustment range.

Description

  The present invention relates to a knob structure, and more particularly to a hard disk knob structure for fixing a hard disk and a follow focus remote controller using the knob structure.

  The conventional follow focus remote controller remotely controls the focus of the photographing apparatus using a knob structure. In a normal case, the knob structure includes a relatively rotatable rotating member and a fixed member, and damper grease provided between the rotating member and the fixed member. The rotating member is made of an elastic material such as plastic or rubber, the fixing member is made of metal, and by adjusting the pressing force of the rotating member and the fixing member against the damper grease, The rotational drag between the fixing member and the fixing member can be adjusted, thereby making the rotation between the rotating member and the fixing member relatively smooth. However, since the contact area between the rotating member and the fixing member in the knob structure is relatively small, the capacity of the damper grease is limited, and the pressure of the rotating member and the fixing member against the damper grease is increased. When the damper grease is pushed from between the rotating member and the fixed member, it easily overflows, the rotating member is brought into direct contact with the fixed member, and the frictional force between the two increases, Sliding when adjusting the knob assembly is disadvantageous, which is disadvantageous for accurate adjustment of the rotation angle of the knob assembly, and also disadvantageous for controlling the focus of the camera. Further, the braking adjustment range of the knob assembly is relatively narrow.

  In view of this, it is necessary to provide a knob structure having a relatively wide braking adjustment range and a follow focus remote controller using the knob structure.

  A knob structure comprising: a fixed member; a rotary member provided rotatably on the fixed member; and at least one movable member movably provided between the fixed member and the rotary member. The fixing member includes a receiving portion, and the rotating member is provided in the receiving portion. A first damper grease is provided between the at least one movable member and the fixed member, and a second damper grease is provided between the at least one movable member and the rotating member; The magnitude of braking by the first damper grease and the second damper grease is different.

  Furthermore, there are a plurality of the movable members, and the plurality of movable members are stacked between the fixed member and the rotating member, and the first damper grease is formed of the plurality of movable members. The second damper grease is provided between one of the plurality of movable members close to the rotating member and the rotating member. A third damper grease is further provided so that a plurality of damper grease layers are formed between two adjacent movable members.

  Further, the magnitude of braking by the plurality of damper grease layers is different.

  In some embodiments, the magnitude of braking by the plurality of damper grease layers is the same.

  In some embodiments, the magnitude of braking by some damper grease layers in the plurality of damper grease layers is the same, and the magnitude of braking by some other damper grease layers is different.

  The knob structure further includes an adjustment assembly, and the adjustment assembly includes a guide member connected to the fixed member and the rotating member, and an adjustment member movably provided on the guide member, The adjusting member can drive the movement of the rotating member under the driving of an external force, and adjusts the pressure of the movable member between the rotating member and the fixed member, respectively.

  Furthermore, the adjustment member and the guide member are connected via a screw, and the adjustment member can be rotated to adjust the mounting position of the adjustment member relative to the guide member.

  Furthermore, the adjustment member is slidably provided on the guide member, a plurality of locking portions are formed on the guide member, and an engagement portion that locks with the locking portion is formed on the adjustment member. The adjusting member is selectably locked with one of the plurality of locking portions so as to adjust a mounting position of the adjusting member with respect to the guide member under driving of an external force. Is possible.

  Furthermore, one of the locking portion and the engaging portion is a groove, and the other is a locking protrusion that engages with the groove.

  Further, the adjustment assembly further includes an elastic member, and the elastic member is provided between the adjustment member and the rotating member, and the adjustment member is elastically driven under an external force. By adjusting the elasticity of the member, the pressure of the movable member between the rotating member and the fixed member can be adjusted.

  Further, the adjustment assembly further includes a pressing member, and the pressing member abuts between the elastic member and the adjustment member.

  Further, the elastic member is a helical spring that covers the guide member, and the pressing member includes an outer sleeve member that covers the guide member, and a flange formed on the outer sleeve member, The outer sleeve member is inserted into the elastic member and presses the flange against the end of the elastic member.

  Further, the pressing member includes an inner sleeve member that is rotated between the guide member and the outer sleeve member, and a roller that is provided between the inner sleeve member and the outer sleeve member. Further, the adjustment member abuts on the inner sleeve member.

  Further, the rotating member includes a peripheral wall and a bottom wall formed at one end of the peripheral wall, and the bottom wall is provided near the fixing member, and the bottom wall includes an engaging portion. The movable member is provided between the fixed member and the engaging portion.

  The knob structure further includes a connection shaft, the connection shaft passes through the fixing member and the bottom wall, and the guide member is provided on the connection shaft.

  Further, a through hole is formed through the fixing member, a covering member is provided in the through hole, and the connection shaft passes through the covering member and connects to the bottom wall, The connecting shaft rotates and connects with the fixing member via the covering member.

  Furthermore, the through hole is a step hole, has a step surface, and the covering member includes an outer sleeve member that covers the connection shaft, and a flange formed on the outer sleeve member, The outer sleeve member is accommodated in the through hole and presses the flange onto the step surface of the through hole.

  The covering member further includes an inner sleeve member provided between the connection shaft and the outer sleeve member, and a roller provided between the inner sleeve member and the outer sleeve member. The connection shaft passes through the inner sleeve member and is fixedly connected to the inner sleeve member.

  Further, the connection shaft includes a socket portion, and an insertion contact portion and a close contact portion respectively formed at both ends of the socket portion, and the socket portion is fixedly connected to the inner sleeve member, and the insertion contact portion Passes through the bottom wall and connects to the guide member, and the diameter of the contact portion is larger than the diameter of the socket portion, and the contact portion contacts the end of the inner sleeve member.

  Further, a connection portion is provided in the receiving portion, a first accommodation cavity is opened in the connection portion, the movable member is accommodated in the first accommodation cavity, and the engagement portion is Extend into the first receiving cavity.

  Furthermore, a first housing groove is formed in the bottom wall of the first housing cavity, and the first housing groove is used for housing the first damper grease.

  Further, the first receiving groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves.

  Further, a second receiving cavity is provided on the side of the bottom wall facing the fixing member, the connecting portion extends and is received in the second receiving cavity, and the engaging portion is It is formed by extending from the bottom wall of the second accommodation cavity to the first accommodation cavity.

  Furthermore, a second housing groove is formed in the bottom wall of the second housing cavity, and the second housing groove is used for housing the second damper grease.

  Furthermore, the second receiving groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves.

  Further, the frictional force when the first damper grease is provided between the fixed member and the movable member is such that the first damper grease is provided between the fixed member and the movable member. It is smaller than the friction force when not.

  Further, the fixed member and the movable member are made of materials having different hardnesses.

  Furthermore, the fixed member is made of an aluminum alloy, and the movable member is made of brass.

  Further, the frictional force when the second damper grease is provided between the rotating member and the movable member is such that the second damper grease is provided between the rotating member and the member. It is smaller than the friction force when there is no.

  Further, the rotating member and the movable member are made of materials having different hardnesses.

  Further, the rotating member is made of an aluminum alloy, and the movable member is made of brass.

  A follow focus remote controller comprising: a control device; an angle sensor electrically connected to the control device; and a knob structure electrically connected to the control device and the angle sensor. The knob structure includes a fixing member and a rotating member provided rotatably on the fixing member. The fixing member includes a receiving portion, and the rotating member is provided on the receiving portion. The knob structure further includes at least one movable member movably provided between the fixed member and the rotating member. A first damper grease is provided between the at least one movable member and the fixed member, and a second damper grease is provided between the at least one movable member and the rotating member. The braking of the first damper grease and the second damper grease is different in magnitude, and the angle sensor is electrically connected to the knob structure, senses rotation angle information of the rotating member, and rotates the rotation. Used to transmit angle information to the control device, which issues a corresponding control command.

  Furthermore, there are a plurality of the movable members, and the plurality of movable members are stacked between the fixed member and the rotating member, and the first damper grease is formed of the plurality of movable members. The second damper grease is provided between one of the plurality of movable members close to the rotating member and the rotating member. In addition, a third damper grease is further provided between two adjacent movable members, and a plurality of damper grease layers are formed.

  Further, the magnitude of braking by the plurality of damper grease layers is different.

  In some embodiments, the magnitude of braking by the plurality of damper grease layers is the same.

  In some embodiments, the magnitude of braking by some of the damper grease layers in the plurality of damper grease layers of the movable member is the same, and the magnitude of braking by some of the other damper grease layers is different.

  The knob structure further includes an adjustment assembly, and the adjustment assembly includes a guide member connected to the fixed member and the rotating member, and an adjustment member movably provided on the guide member, The adjusting member can drive the movement of the rotating member so as to adjust the pressure of the movable member between the rotating member and the fixed member, respectively, under the driving of an external force.

  Furthermore, the adjustment member and the guide member are connected via a screw, and the adjustment member can be rotated to adjust the mounting position of the adjustment member relative to the guide member.

  Furthermore, the adjustment member is slidably provided on the guide member, a plurality of locking portions are formed on the guide member, and an engagement portion that locks with the locking portion is formed on the adjustment member. The adjusting member is selectably locked with one of the plurality of locking portions so as to adjust a mounting position of the adjusting member with respect to the guide member under driving of an external force. can do.

  Furthermore, one of the locking portion and the engaging portion is a groove, and the other is a locking protrusion that engages with the groove.

  Further, the adjustment assembly further includes an elastic member, and the elastic member is provided between the adjustment member and the rotating member, and the adjustment member is elastically driven under an external force. By adjusting the elasticity of the member, the pressure of the movable member between the rotating member and the fixed member can be adjusted.

  Further, the adjustment assembly further includes a pressing member, and the pressing member abuts between the elastic member and the adjustment member.

  Further, the elastic member is a helical spring that covers the guide member, and the pressing member includes an outer sleeve member that covers the guide member, and a flange formed on the outer sleeve member, The outer sleeve member is inserted into the elastic member and presses the flange against the end of the elastic member.

  Further, the pressing member includes an inner sleeve member that is rotated between the guide member and the outer sleeve member, and a roller that is provided between the inner sleeve member and the outer sleeve member. Further, the adjustment member abuts on the inner sleeve member.

  Further, the rotating member includes a peripheral wall and a bottom wall formed at one end of the peripheral wall, and the bottom wall is provided near the fixing member, and the bottom wall includes an engaging portion. The movable member is provided between the fixed member and the engaging portion.

  The knob structure further includes a connection shaft, the connection shaft passes through the fixing member and the bottom wall, and the guide member is provided on the connection shaft.

  Further, a through hole is formed through the fixing member, a covering member is provided in the through hole, and the connection shaft passes through the covering member and connects to the bottom wall, The connecting shaft rotates and connects with the fixing member via the covering member.

  Furthermore, the through hole is a step hole, has a step surface, and the covering member includes an outer sleeve member that covers the connection shaft, and a flange formed on the outer sleeve member, The outer sleeve member is accommodated in the through hole and presses the flange onto the step surface of the through hole.

  The covering member further includes an inner sleeve member provided between the connection shaft and the outer sleeve member, and a roller provided between the inner sleeve member and the outer sleeve member. The connection shaft passes through the inner sleeve member and is fixedly connected to the inner sleeve member.

  Further, the connection shaft includes a socket portion, and an insertion contact portion and a close contact portion respectively formed at both ends of the socket portion, and the socket portion is fixedly connected to the inner sleeve member, and the insertion contact portion Passes through the bottom wall and connects to the guide member, and the diameter of the contact portion is larger than the diameter of the socket portion, and the contact portion contacts the end of the inner sleeve member.

  Further, a connection portion is provided in the receiving portion, a first accommodation cavity is opened in the connection portion, the movable member is accommodated in the first accommodation cavity, and the engagement portion is Extend into the first receiving cavity.

  Furthermore, a first housing groove is formed in the bottom wall of the first housing cavity, and the first housing groove is used for housing the first damper grease.

  Further, the first receiving groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves.

  Further, a second receiving cavity is provided on the side of the bottom wall facing the fixing member, the connecting portion extends and is received in the second receiving cavity, and the engaging portion is It is formed by extending from the bottom wall of the second accommodation cavity to the first accommodation cavity.

  Furthermore, a second housing groove is formed in the bottom wall of the second housing cavity, and the second housing groove is used for housing the second damper grease.

  Furthermore, the second receiving groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves.

  Further, the frictional force when the first damper grease is provided between the fixed member and the movable member is such that the first damper grease is provided between the fixed member and the movable member. It is smaller than the friction force when not.

  Further, the fixed member and the movable member are made of materials having different hardnesses.

  Furthermore, the fixed member is made of an aluminum alloy, and the movable member is made of brass.

  Further, the frictional force when the second damper grease is provided between the rotating member and the movable member is such that the second damper grease is provided between the rotating member and the member. It is smaller than the friction force when there is no.

  Further, the rotating member and the movable member are made of materials having different hardnesses.

  Further, the rotating member is made of an aluminum alloy, and the movable member is made of brass.

  In the knob structure of the present invention, a movable member is provided between the rotating member and the fixed member, and the first damper grease is provided between the movable member and the fixed member. The second damper grease is provided between the first damper grease and the second damper grease, and the pressure of the rotating member and the fixed member against the damper grease is compared. When the pressure is small, the second damper layer exhibits a main braking buffer effect, and when the pressure of the rotating member and the fixing member against the damper grease is relatively large, the first damper layer has a main braking buffer effect. Demonstrate and expand the braking adjustment range of the knob structure. In addition, even when the knob structure operates under different pressures, the first damper grease layer and the second damper grease layer each adapt to different operating pressures and exhibit a braking buffer effect. Therefore, it is possible to maintain a smooth rotation with respect to the fixed member, which is advantageous for accurate adjustment of the rotation angle of the rotating member, and this allows the follow focus remote controller using the knob structure to focus the external photographing device. It can be controlled accurately.

It is a structural block diagram of the follow focus remote controller provided by the embodiment of the present invention. FIG. 2 is an assembly three-dimensional view of a knob structure of the follow focus remote controller shown in FIG. 1. FIG. 3 is a three-dimensional exploded schematic view of the knob structure of FIG. 2. It is the cross-sectional schematic along the IV-IV line of the knob structure shown by FIG.

  The following specific embodiments will be further described in conjunction with the drawings described above.

  Hereinafter, the technical techniques in the embodiments of the present invention will be described clearly and completely in conjunction with the drawings in the embodiments of the present invention. However, the described embodiments are only some of the embodiments of the present invention, and It is clear that this is not an example. Based on the embodiments of the present invention, all other embodiments obtained under the premise that a person skilled in the art does not perform creative work belong to the scope protected by the present invention.

  What needs to be explained is that when an assembly is “fixed” to another assembly, it may be fixed directly on the other assembly, or there may be other assemblies on both. When an assembly is “connected” to another assembly, it may be directly connected to another assembly, or the other assembly may be present in both simultaneously. When an assembly is “provided” in another assembly, the assembly may be provided directly in the other assembly, or the other assembly may exist simultaneously in both. The terms “vertical”, “horizontal”, “left”, “right” and similar expressions used herein are for illustrative purposes only.

  Except where otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art of the invention. The terminology used in the specification of the present invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term “and / or” includes any combination of one or more of the associated listed items.

  As shown in FIG. 1, an embodiment of the present invention provides a follow focus remote controller 200, and the follow focus remote controller 200 is wirelessly connected to a photographing device (not shown) such as a video camera or a still camera, The focus of the photographing apparatus is remotely controlled. The follow focus remote controller 200 includes a control device 210, an angle sensor 230 electrically connected to the control device 210, a knob structure 100 electrically connected to both the control device 210 and the angle sensor 230, including. The knob structure 100 is rotated by a certain angle by an external force, and the angle sensor 230 can detect rotation angle information of the knob structure 100 and transmit the rotation angle information to the control device 210. 210 controls the focus of the photographing apparatus by issuing a corresponding control command.

  As shown in FIG. 2, the knob structure 100 includes a fixed assembly 10, a rotary assembly 30 rotatably connected to the fixed assembly 10, and an adjustment assembly 50 provided in the rotary assembly 30. Including. The damper grease is filled between the fixed assembly 10 and the rotating assembly 30, and the adjusting assembly 50 is used to adjust the pressing force of the fixing assembly 10 and the rotating assembly 30 against the damper grease.

  As shown in FIGS. 3 and 4, the fixing assembly 10 includes a fixing member 12, a covering member 14 provided on the fixing member 12, and a connecting shaft 16 penetrating the covering member 14.

  The fixing member 12 is used to mount the rotating assembly 30 and the adjusting assembly 50. In the present embodiment, the fixing member 12 is made of an aluminum alloy. The fixing member 12 includes a receiving part 121 and a connection part 123 provided in the receiving part 121. The receiving part 121 has a substantially disk shape, and the connecting part 123 is formed at a position of a substantially central part on one side of the receiving part 121.

  A first accommodation cavity 1231 is opened in the connection portion 123, and the first accommodation cavity 1231 is used to accommodate a part of the structure of the rotary assembly 30. The connection portion 123 is further provided with a through hole 1233 penetrating through a substantially central position of the first accommodation cavity 1231, and a first accommodation groove 1237 is formed in the bottom wall of the first accommodation cavity 1231. It has been opened.

  In the present embodiment, the through hole 1233 is a step hole including a first hole 1234 communicating with the first accommodation cavity 1231 and a second hole 1235 communicating with the first hole 1234. The hole diameter of the first hole 1234 is smaller than the hole diameter of the second hole 1235, and a step surface 1236 is formed between the first hole 1234 and the second hole 1235.

  In the present embodiment, the first receiving groove 1237 is recessed in the bottom wall of the first receiving cavity 1231 and is formed by intersecting a plurality of annular concentric grooves and radial grooves. The first housing groove 1237 is used for housing the damper grease. The shape of the first receiving groove 1237 is a plurality of annular concentric grooves, a plurality of radial grooves, a plurality of concave points provided in the bottom wall of the connection portion 123, a plurality of long grooves parallel to each other, or a curved shape. It can be appreciated that it may be designed as a groove, a curved groove, or other irregular groove shape.

  The covering member 14 is accommodated in the through hole 1233 and used to connect the connecting shaft 16 to the fixing member 12 in a rotatable manner. In the present embodiment, the covering member 14 is a bearing including an inner sleeve member 141, a roller 143, an outer sleeve member 145, and a flange portion 147.

  Each of the inner sleeve member 141 and the outer sleeve member 145 has a substantially cylindrical shape, and is provided coaxially in the through hole 1233. Further, the outer sleeve member 145 is fixedly connected to the inner wall of the first hole 1234, and the inner sleeve member 141 is accommodated in the outer sleeve member 145 and is rotatable with respect to the outer sleeve member 145. The plurality of rollers 143 are provided between the inner sleeve member 141 and the outer sleeve member 145. The flange portion 147 is formed at one end of the outer sleeve member 145 and is accommodated in the second hole 1235. The flange portion 147 is formed by extending in the radial direction of the outer sleeve member 145 from the outer peripheral wall of the outer sleeve member 145, and when the outer sleeve member 145 is mounted in the first hole 1234, the flange portion 147 is , Abuts against the stepped surface 1236 of the through hole 1233.

  The connecting shaft 16 penetrates the covering member 14 and is fixedly connected to the inner sleeve member 141 of the covering member 14. The connection shaft 16 is attached to the rotation assembly 30 and the adjustment assembly 50 and includes a socket portion 161, a close contact portion 163 formed at each end of the socket portion 161, and an insertion connection portion 165.

  The socket portion 161 has a substantially cylindrical shape, is accommodated in the inner sleeve member 141, and is fixedly connected to the inner sleeve member 141. The contact portion 163 is formed at one end of the socket portion 161 and is accommodated in the second hole 1235 of the through hole 1233. The diameter of the contact portion 163 is larger than the diameter of the socket portion 161, and the contact portion 163 contacts the end portion of the inner sleeve member 141 when the socket portion 161 is inserted into the inner sleeve member 141. The insertion contact portion 165 is formed at one end of the socket portion 161 away from the contact portion 163 and is used for mounting the adjustment assembly 50. In the present embodiment, an external screw connection portion (not shown) is formed at one end of the insertion connection portion 165 away from the socket portion 161, and the external screw connection portion has a partial structure of the adjustment assembly 50. Used to connect.

  The rotating assembly 30 is rotatably connected to the fixed member 12 and includes a rotating member 32 and a movable member 34. The rotating member 32 is placed on the connecting shaft 16 and is superimposed on the fixed member 12, and the movable member 34 is provided between the rotating member 32 and the fixed member 12 so as to be movable. Specifically, in the illustrated embodiment, the rotating member 32 is used as a knob of the knob structure 100 so that the user can control the focus of the photographing apparatus by rotating the knob.

  In the present embodiment, the rotating member 32 has a substantially cylindrical shape having a bottom wall, and includes a peripheral wall 321 and a bottom wall 323 formed at one end of the peripheral wall 321.

  The peripheral wall 321 has a substantially cylindrical shape, is provided on the fixing member 12 so as to be substantially coaxial with the through-hole 1233, and is used to accommodate the adjustment assembly 50.

  The bottom wall 323 is formed at one end of the peripheral wall 321 close to the fixing member 12, is overlaid on the connection portion 123 of the fixing member 12, and penetrates the insertion connecting portion 165 of the connection shaft 16 at a substantially central position of the bottom wall 323. The connecting shaft 16 is rotatably connected to the rotating member 32 by being extended into the peripheral wall 321. In the present embodiment, the bottom wall 323 is made of an aluminum alloy.

  In the bottom wall 323, a second accommodation cavity 324 is recessed toward one side of the connection portion 123. In the present embodiment, the second accommodation cavity 324 has a substantially circular groove and is used to accommodate the connection portion 123 of the fixing member 12. When the bottom wall 323 is put on the connecting shaft 16 and is superimposed on the fixing member 12, the connecting portion 123 extends and is accommodated in the second accommodating cavity 324, and the peripheral wall of the second accommodating cavity 324 is connected to the connecting portion 123. Surround the outside. Further, when the bottom wall 323 is put on the connecting shaft 16 and is superimposed on the fixing member 12, a certain gap is left between the bottom wall of the second receiving cavity 324 and the top end of the connecting portion 123, and the adjustment assembly 50 allows the relative distance between the rotating member 32 and the fixed member 12 to be adjusted.

  An engagement portion 325 is formed by extending on the bottom wall of the second accommodation cavity 324, and a second accommodation groove 327 is formed in the engagement portion 325. The engaging portion 325 has a substantially annular shape, extends into the first accommodation cavity 1231, and is provided at a distance from the bottom wall of the first accommodation cavity 1231. Specifically, in the illustrated embodiment, the second receiving groove 327 is recessed at the periphery of the engaging portion 325 and is formed jointly by two annular concentric grooves. The second storage groove 327 is used for storing the damper grease. The shape of the second receiving groove 327 may be designed as a plurality of radial grooves, or may be formed by intersecting a plurality of annular concentric grooves and radial grooves. Or other irregular groove shapes can be better understood.

  The movable member 34 has a substantially annular piece shape, and is provided between the bottom wall of the first accommodating cavity 1231 of the fixed member 12 and the engaging portion 325 of the rotating member 32. In the present embodiment, the movable member 34 is made of brass.

  The first damper grease is filled so as to form a first damper grease layer (not shown) between the movable member 34 and the bottom wall of the first receiving cavity 1231. The first damper grease has a first braking characteristic, and specifically, the first braking characteristic is expressed as braking and viscosity of the first damper grease.

  The second damper grease is filled so as to form a second damper grease layer (not shown) between the movable member and the engaging portion 325. The second damper grease has a second braking characteristic, and specifically, the second braking characteristic is expressed as braking and viscosity of the second damper grease. In the present embodiment, the braking of the first damper grease is larger than the braking of the second damper grease. It can be understood that the braking of the first damper grease may be smaller than the braking of the second damper grease. The first damper grease and the second damper grease are filled between the rotating member 32 and the fixed member 12, and used for realizing lubrication and buffering between the rotating member 32 and the fixed member 12, and rotating. The member 32 can be smoothly rotated, the knob structure 100 can have a relatively good rotation feel, and the rotation angle of the knob structure 100 can be accurately adjusted, thereby accurately controlling the photographing apparatus focus. .

  The adjustment assembly 50 is provided at one end where the insertion joint 165 is accommodated in the peripheral wall 321, and is used to adjust the relative distance between the fixing member 12 and the rotation member 32, and thereby the first damper. The magnitude of the pressure of the fixing member 12 and the rotating member 32 with respect to the grease layer and the second damper grease layer is adjusted. The adjustment assembly 50 includes a guide member 52, an elastic member 54 provided on the guide member 52, a pressing member 56, and an adjustment member 58.

  The guide member 52 has a substantially columnar shape, and one end near the insertion contact portion 165 forms a connection hole 521. An inner screw connection portion (not shown) is formed in the connection hole 521, and the inner screw connection portion is used for screwing with the outer screw connection portion of the insertion contact portion 165, thereby the guide member 52. Is fixedly connected to the connecting shaft 16. An outer screw (not shown) is formed on the outer periphery of the guide member 52, and the outer screw is used for connection with the adjustment member 58.

  The elastic member 54 is movably covered on the guide member 52, and one end thereof abuts on the bottom wall 323 of the rotating member 32. In the present embodiment, the elastic member 54 is a spiral spring. It can be understood that the elastic member 54 may be another elastic member such as a leaf spring or an elastic sleeve made of an elastic material.

  The pressing member 56 is movably covered by the guide member 52 and is positioned at one end of the elastic member 54 away from the bottom wall 323. One end of the pressing member 56 is in contact with the end of the elastic member 54, and both ends of the elastic member 54 are in contact with the bottom wall 323 and the pressing member 56, respectively. In the present embodiment, the pressing member 56 is a bearing. The structure of the pressing member 56 is substantially the same as the structure of the covering member 14, and similarly includes an inner sleeve member 561, a roller 563, an outer sleeve member 565, and a flange portion 567. The outer sleeve member 564 is inserted into the elastic member 54, and the flange portion 567 is formed at one end of the outer sleeve member 565 away from the bottom wall 323, and abuts the end of the elastic member 54.

  The adjustment member 58 is placed on the guide member 52, is located at one end of the pressing member 56 away from the elastic member 54, and is screwed with an external screw of the guide member 52. One end of the adjusting member 58 abuts on the inner sleeve member 561 of the pressing member 56 and rotates the adjusting member 58 to cause the adjusting member 58 to press the pressing member 56 and move it toward the bottom wall 323 of the rotating member 32. The flange portion 567 of the pressing member 56 applies pressure to the elastic member 54, and the elastic member 54 is compressed. The connecting shaft 16 is fixedly connected to the fixing member 12 by the covering member 14, and the flange portion 147 of the covering member 14 is in contact with the fixing member 12, so that the elastic member 54 and the covering member 14 are in contact with the bottom wall 323 and the fixing member 12, respectively. Pressure, thereby reducing the relative distance between the bottom wall 323 and the fixing member 12, and the bottom wall 323 with respect to the first damper grease layer and the second damper grease layer, and The pressure of the fixing member 12 is increased.

  When assembling the knob structure 100 of the embodiment of the present invention, first, the covering member 14 is put on the connecting shaft 16, the connecting shaft 16 is passed through the through hole 1233, and the outer sleeve member 145 of the covering member 14 is fixed to the fixing member 12. Connecting. Next, after applying the first damper grease to the bottom wall of the first accommodation cavity 1231 of the fixed member 12, the movable member 34 is mounted in the first accommodation cavity 1231, and the movable member 34 is attached to the first accommodation cavity 1231. Covering with a first damper grease, the first damper grease layer is formed. Next, the second damper grease is applied to the bottom wall of the second accommodation cavity 324 of the rotating member 32, and the engaging portion 325 is covered with the second damper grease. Further, the rotating member 32 is put on the connecting shaft 16, the outer wall of the connecting portion 123 is covered with the peripheral wall of the second receiving cavity 324, and the engaging portion 325 is extended into the first receiving cavity 1231 of the fixing member 12. The joint portion 325 corresponds to the movable member 34, and thereby forms the second damper grease layer between the engaging portion 325 and the movable member 34. Finally, the guide member 52 is connected to the insertion contact portion 165 of the connecting shaft 16, and the elastic member 54, the pressing member 56, and the adjustment member 58 are covered on the guide member 52 in this order.

  When the knob structure 100 according to the embodiment of the present invention is used, the rotation angle of the knob structure 100 can be adjusted by rotating the rotary member 32. When the braking between the rotating member 32 and the fixing member 12 is too large or too small, the adjusting member 58 is rotated from the bottom wall 323 along the axial direction of the guide member 52 by rotating the adjusting member 58. The relative distance between the rotating member 32 and the fixed member 12 is adjusted by adjusting the pressure of the elastic member 54 against the bottom wall 323 away from or approaching the first damper grease layer and the second damper. The pressure of the bottom wall 323 and the fixing member 12 against the grease layer is adjusted, and finally the braking adjustment between the rotating member 32 and the fixing member 12 is realized.

  Specifically, when it is required to have a relatively small rotational braking between the rotating member 32 and the fixed member 12, the adjusting member 58 is rotated away from the bottom wall 323, and the first member The pressure of the engaging portion 325 and the fixing member 12 with respect to the damper grease layer and the second damper grease layer is reduced. When the rotating member 32 rotates relative to the fixed member 12, the braking of the first damper grease is larger than the braking of the second damper grease, and the movable member 34 causes the first damper layer to be fixed to the fixing member 12. By adhering to the upper surface, the rotating member 32 is rotated with respect to the movable member 34 and the fixed member 12, and the second damper layer exhibits a main braking buffer effect.

  When it is required to have a relatively large rotational braking between the rotating member 32 and the fixed member 12, the adjusting member 58 is rotated to be relatively close to the bottom wall 323, and the first damper grease layer and The pressure of the engaging part 325 and the fixing member 12 with respect to the second damper grease layer is increased. Since the braking of the second damper grease is larger than the braking of the first damper grease, the second damper grease is first pressed into the second receiving groove 327 in the process of adjusting the pressure of the rotating member 32. Then, the engaging portion 325 directly contacts the movable member 34. When the rotating member 32 rotates with respect to the fixed member 12, the frictional force between the engaging portion 325 and the movable member 34 is dry friction, and the frictional force is relatively large. In the meantime, due to the presence of the first damper layer, the frictional force between them is relatively small, and the movable member 34 is adhered onto the engaging portion 325 of the rotating member 32, and the rotating member 32 is moved to the movable member 34. And the first damper layer exhibits a main braking buffer effect.

  When it is necessary to reduce the rotational braking between the rotating member 32 and the fixed member 12 in the above-described state, the adjusting member 58 is rotated to move away from the bottom wall 323 and external force is applied to the rotating member 32. The engagement portion 325 is relatively separated from the fixed member 12 so that a gap appears between the engagement portion 325 and the movable member 34, and the second damper grease flows again due to the negative pressure and is engaged. The gap between the joining portion 325 and the movable member 34 is filled. At this time, the rotating member 32 is rotated with respect to the movable member 34 and the fixed member 12, and the second damper layer exhibits a main braking buffer effect.

  In the knob structure 100 of the present invention, a movable member 34 is provided between the rotating member 32 and the fixed member 12, and the first damper grease is provided between the movable member 34 and the fixed member 12. The second damper grease is provided between the rotating member 32 and the movable member 34 so that the magnitude of braking by the first damper grease and the second damper grease is different, and the rotation with respect to the damper grease is performed. When the pressure of the member 32 and the fixing member 12 is relatively small, the second damper layer exerts a main braking buffer effect, and when the pressure of the rotating member 32 and the fixing member 12 against the damper grease is relatively large, The first damper layer exerts a main braking buffer effect and expands the braking adjustment range of the knob structure 100. Further, even if the knob structure 100 operates under different pressures, the first damper grease layer and the second damper grease layer adapt to different operating pressures and exhibit a braking buffer effect, so that the rotating member 32 can still maintain a smooth rotation with respect to the fixed member, which is advantageous for accurate adjustment of the rotation angle of the rotation member 32, and can accurately control the focus of the photographing apparatus.

  In the present embodiment, the fixed member 12 and the bottom wall 323 of the rotating member 32 are made of aluminum alloy, the movable member 34 is made of brass, and the fixed member 12, the rotating member 32, and the movable member 34 have different hardness or The friction coefficient between the fixed member 12 and the movable member 34 is made when the damper grease is filled between the fixed member 12 and the movable member 34. In other words, the first damper grease layer and the second damper grease layer can be used for different operating pressures.

  It is understood that both the fixed member 12 and the bottom wall 323 of the rotating member 32 may be made of a metal material other than an aluminum alloy such as a steel material or other alloy, and may be made of a plastic or a rubber material. it can. Similarly, the movable member 34 may be made of other materials other than brass, such as tin bronze, polyoxymethylene (polyacetal), or rubber. The hardness of the fixed member 12 and the movable member 34 is different, and the rotating member 32 and the movable member 34 are different. When the damper grease is filled between the fixed member 12 and the movable member 34, the frictional force between the fixed member 12 and the movable member 34 is free from damper grease. The first damper grease layer and the second damper grease layer can be used for different operating pressures.

  As a result, the friction force when the damper grease is filled between the fixed member 12 and the movable member 34 and between the rotating member 32 and the movable member 34 is smaller than the friction force when there is no damper grease. Furthermore, the fixed member 12, the rotating member 32, and the movable member 34 may be made of the same type of material.

  The number of the movable members 34 may be one or a plurality, and when there are a plurality of movable members 34, between the engaging portions 325 of the rotating member 32 and the first accommodating cavity 1231 of the fixed member 12. The damper grease is provided between the bottom wall and the two adjacent movable members 34 to form a damper grease layer, and the magnitude of braking by each damper grease layer is different. It can be appreciated that while increasing the rotational braking adjustment range of the structure 100, the knob structure 100 can still maintain smooth rotation under different pressures.

  For example, when there are two movable members 34, the first movable member and the second movable member may be used. The first movable member is provided near the fixed member 12, and the first damper grease is provided between the first movable member and the bottom wall of the first receiving cavity 1231. The second movable member is provided near the engaging portion 325, and the second damper grease is provided between the second movable member and the engaging portion 325. When the rotating member 32 is connected to the fixed member 12 by rotating, the first movable member faces the second movable member substantially in parallel, and the first movable member and the second movable member 32 are opposed to each other. A third damper grease is provided between the movable member and the movable member. The braking of the third damper grease is larger than the braking of the second damper grease and smaller than the braking of the first damper grease. When the pressure of the rotating member 32 and the fixing member 12 against the damper grease is relatively small, the rotating member 32 rotates with respect to the fixing member 12, and the braking of the second damper grease is performed by the first damper grease and the first damper grease. Therefore, the first movable member adheres to the fixed member 12 via the first damper grease, and the second movable member attaches the third damper grease to the third damper grease. The rotating member 32 rotates relative to the second movable member, the first movable member and the fixed member 12, and the second damper grease is Demonstrate the main braking buffer effect.

  When the pressure of the rotating member 32 and the fixing member 12 against the damper grease increases to a certain value, the second damper grease is first pressed into the second receiving groove 327 in the rotating member 32, and the engagement is increased. The joint portion 325 is brought into direct contact with the second movable member, and at this time, the frictional force between the engaging portion 325 and the second movable member only increases, and the second movable member and The friction between the first movable member and the first movable member is relatively small due to the presence of the third damper grease, and the braking of the first damper grease is larger than that of the third damper grease. The first movable member adheres to the fixed member 12 through the first damper grease. At this time, the rotating member 32 moves the second movable member to the first movable member and the fixed member 12. Against Is, the third damper grease, exerts a major damping cushioning effect.

  Similarly, when the pressure of the rotating member 32 and the fixing member 12 against the damper grease continues to increase to a certain value, the second damper grease and the first damper grease correspond to each other during the rotation of the rotating member 32. The rotating member 32 moves the second movable member and the first movable member and rotates with respect to the fixed member 12, and the first damper grease is Demonstrate effective braking buffer effect. Similarly, the number of movable members 34 may be three, four or more, and will not be described one by one in this specification.

  Similarly, it can be understood that when there are a plurality of movable members 34, between one of the plurality of movable members and the engaging portion 325 of the rotating member 32, the other of the plurality of movable members and the fixed member. Damper grease is provided between the bottom wall of each of the first housing cavities 1231 and two adjacent movable members, and a plurality of damper grease layers are formed, and braking by each damper grease layer is performed. Any size may be different, not only increasing the adjustable range of rotational braking of the knob structure 100 but also allowing the knob structure 100 to still maintain smooth rotation under different pressures. For example, the magnitude of braking by two damper grease layers among the plurality of damper grease layers is the same, and the magnitude of braking by the remaining damper grease layers is different. Alternatively, the magnitude of braking by the three damper grease layers among the plurality of damper grease layers is the same, and the magnitude of braking by the remaining damper grease layers is different. Or the magnitude | size of the damping | braking by a several damper grease layer is another form of combination, and it does not explain one by one in this specification.

  The elastic member 54 and the pressing member 56 may be omitted, but the adjustment member 58 is put on the guide member 52, contacts the bottom wall 323 of the rotation member 32, and the adjustment member 58 is rotated to rotate the guide member 52. It can be understood that the pressure of the rotating member 32 and the fixing member 12 against the damper grease is adjusted by moving along the axial direction and pressing the rotating member 32 to move.

  It can be understood that the structure of the covering member 14 is not limited to the above-described bearing structure, and may be provided as another connection structure, and the connection shaft 16 may be rotationally connected to the fixing member 12. For example, the covering member 14 may be a sleeve having a flange portion 147, and the sleeve is rotatably covered with the socket portion 161 of the connection shaft 16, and the flange portion on the sleeve is a step of the fixing member 12. Abuts against surface 1236. Eventually, the covering member 14 may be omitted, but the diameter of the contact portion 163 of the connecting shaft 16 is made larger than the diameter of the first hole 1234 of the through hole 1233 and larger than the diameter of the second hole 1235. The contact portion 163 contacts the stepped surface 1236 of the fixing member 12 when the connection shaft 16 is passed through the through-hole 1233 by reducing the size. Similarly, it can be understood that when the connecting shaft 16 penetrates the fixing member 12, the connection with the fixing member 12 may be a fixed connection or a rotational connection. When penetrating the bottom wall 323 of the rotating member 32, the connection with the rotating member 32 may be a sliding connection that stops rotation or a movable connection that can rotate and slide.

  The structure of the pressing member 56 is not limited to the above-described bearing structure, but can be provided as another pressing structure, and the adjusting member 58 can be pressed against the elastic member 54 by the pressing member 56, and the elastic member 54 is elastically deformed. It can be understood that the pressure of the rotating member 32 and the fixing member 12 against the damper grease is adjusted. For example, the pressing member 56 may be a sleeve having a flange portion 147, and the sleeve is rotatably covered with the guide member 52, and the flange portion on the sleeve contacts the step surface 1236 of the fixing member 12. Touch. Eventually, although the pressing member 56 may be omitted, the adjusting member 58 is directly pressed against the elastic member 54 and the pressure of the rotating member 32 and the fixing member 12 against the damper grease is adjusted by the adjusting member 58 and the elastic member 54. .

  The engagement between the adjustment member 58 and the guide member 52 is not limited to the above-described screw engagement, but may be other engagement structures, and the adjustment member 58 is driven under the driving of an external force. After the external force disappears after sliding with respect to the guide member 52, the user can adjust the mounting position of the adjustment member 58 with respect to the guide member 52 by rotating relative to the guide member 52, and rotate. It can be seen that the purpose of adjusting the pressure between the member 32 and the fixed member 12 is achieved.

  For example, the adjusting member 58 and the guide member 52 are locked and engaged. Specifically, a plurality of locking portions are formed on the guide member 52, and the plurality of locking portions are provided at intervals from each other along the axial direction of the guide member 52. The adjustment member 58 is slidably provided on the guide member 52, and an engaging portion is formed thereon. The engaging portion engages with one of the plurality of engaging portions, and positions the adjustment member 58 on the guide member 52. By pushing and moving the adjustment member 58, the engaging portion is separated from one of the plurality of locking portions, engaged with the other of the plurality of locking portions, and the adjusting member 58 for the guide member 52. Can be adjusted, thereby achieving the purpose of adjusting the pressure between the rotating member 32 and the fixed member 12. Further, the locking portion may be a groove recessed in the guide member 52, and correspondingly, the engaging portion is a locking protrusion formed on the adjusting member 58 by extending. Alternatively, the engagement between the locking portion and the adjustment portion may be a structure in which a hook and a groove are engaged.

  The connecting shaft 16 and the guide member 52 may be assembled and connected together, or may be integrally formed. The guide member 52 is provided on the rotating member 32 and connects the connecting shaft 16 and the fixing member 12. Thus, it can be understood that the pressure between the rotating member 32 and the fixed member 12 can be adjusted by moving the adjusting member 58 relative to the guide member 52.

  Further, those skilled in the art can make various other corresponding changes and improvements according to the technical idea of the present invention, and all of these changes and improvements are within the protection scope of the claims of the present invention. Belongs.

200 Follow focus remote controller 210 Control device 230 Angle sensor 100 Knob structure 10 Fixing assembly 12 Fixing member 121 Receiving part 123 Connection part 1231 First receiving cavity 1233 Through hole 1234 First hole 1235 Second hole 1236 Step surface 1237 1 receiving groove 14 Cover member 141, 561 Inner sleeve member 143, 563 Roller 145, 565 Outer sleeve member 147, 567 Flange portion 16 Connection shaft 161 Socket portion 163 Adhering portion 165 Insertion connecting portion 30 Rotating assembly 32 Rotating member 321 Circumferential wall 323 Bottom wall 324 Second receiving cavity 325 Engaging portion 327 Second receiving groove 50 Adjustment assembly 52 Guide member 521 Connection hole 54 Elastic member 56 Pressing member 58 Adjustment member

Claims (62)

  A knob structure comprising a fixing member and a rotating member rotatably provided on the fixing member, wherein the fixing member includes a receiving portion, and the rotating member is provided on the receiving portion, The knob structure further includes at least one movable member movably provided between the fixed member and the rotating member, and a first damper grease is provided between the at least one movable member and the fixed member. The second damper grease is provided between the at least one movable member and the rotating member, and the magnitude of braking by the first damper grease and the second damper grease is different. A knob structure characterized by that.   There are a plurality of the movable members, and the plurality of movable members are stacked between the fixed member and the rotating member, and the first damper grease is the fixed member of the plurality of movable members. The second damper grease is provided between one of the plurality of movable members close to the rotating member and the rotating member. The knob structure according to claim 1, further comprising a third damper grease so as to form a plurality of damper grease layers between two adjacent movable members.   The knob structure according to claim 2, wherein the magnitude of braking by the plurality of damper grease layers is different.   The knob structure according to claim 2, wherein the magnitude of braking by the plurality of damper grease layers is the same.   The magnitude of braking by a part of the damper grease layer in the plurality of damper grease layers is the same, and the magnitude of braking by another part of the damper grease layer is different from each other. Knob structure.   The knob structure further includes an adjustment assembly, and the adjustment assembly includes a guide member connected to the fixed member and the rotating member, and an adjustment member movably provided on the guide member, the adjustment member Wherein the movement of the rotating member can be driven to adjust the pressure of the movable member between the rotating member and the fixed member, respectively, under the driving of an external force. Item 2. The knob structure according to Item 1.   The adjustment member and the guide member are connected via a screw, and the adjustment member can be rotated to adjust the mounting position of the adjustment member relative to the guide member. The knob structure described in 1.   The adjusting member is slidably provided on the guide member, a plurality of locking portions are formed on the guide member, and an engaging portion that locks the locking portion is formed on the adjusting member. The adjusting member is selectably lockable with one of the plurality of locking portions so as to adjust the mounting position of the adjusting member with respect to the guide member under the driving of an external force. The knob structure according to claim 6, wherein the knob structure is provided.   The knob structure according to claim 8, wherein one of the locking portion and the engaging portion is a groove, and the other is a locking protrusion that engages with the groove.   The adjusting assembly further includes an elastic member, and the elastic member is provided between the adjusting member and the rotating member, and the adjusting member is configured to move the elastic member under an external force. The knob structure according to claim 6, wherein the pressure of the movable member between the rotating member and the fixed member can be adjusted by adjusting elasticity.   The knob structure according to claim 10, wherein the adjustment assembly further includes a pressing member, and the pressing member abuts between the elastic member and the adjustment member.   The elastic member is a spiral spring that covers the guide member, and the pressing member includes an outer sleeve member that covers the guide member, and a flange formed on the outer sleeve member. The knob structure according to claim 11, wherein the sleeve member is inserted into the elastic member and presses the flange against an end of the elastic member.   The pressing member further includes an inner sleeve member that is rotated between the guide member and the outer sleeve member, and a roller that is provided between the inner sleeve member and the outer sleeve member. The knob structure according to claim 12, wherein the adjusting member abuts on the inner sleeve member.   The rotating member includes a peripheral wall and a bottom wall formed at one end of the peripheral wall, the bottom wall is provided near the fixing member, and an engaging portion is provided in the bottom wall. The knob structure according to claim 6, wherein the movable member is provided between the fixed member and the engaging portion.   15. The knob structure according to claim 14, wherein the knob structure further includes a connection shaft, the connection shaft passes through the fixing member and the bottom wall, and the guide member is provided on the connection shaft. The knob structure described.   A through hole is formed through the fixing member, and a covering member is provided in the through hole. The connecting shaft passes through the covering member and connects to the bottom wall, and the connecting shaft The knob structure according to claim 15, wherein the knob structure is rotated and connected to the fixing member via the covering member.   The through hole is a step hole, has a step surface, and the covering member includes an outer sleeve member that covers the connection shaft, and a flange formed on the outer sleeve member. 17. The knob structure according to claim 16, wherein the sleeve member is accommodated in the through hole and presses the flange onto a stepped surface of the through hole.   The covering member further includes an inner sleeve member provided between the connection shaft and the outer sleeve member, and a roller provided between the inner sleeve member and the outer sleeve member. The knob structure according to claim 17, wherein the shaft passes through the inner sleeve member and is fixedly connected to the inner sleeve member.   The connection shaft includes a socket part, and an insertion contact part and a close contact part formed at both ends of the socket part, the socket part is fixedly connected to the inner sleeve member, and the insertion connection part is Passing through the bottom wall and connecting to the guide member, a diameter of the contact portion is larger than a diameter of the socket portion, and the contact portion contacts an end portion of the inner sleeve member. The knob structure according to claim 18.   A connection portion is provided in the receiving portion, a first accommodation cavity is opened in the connection portion, the movable member is accommodated in the first accommodation cavity, and the engagement portion is in the first location. The knob structure according to claim 14, wherein the knob structure extends into the receiving cavity.   21. The first accommodation groove is formed in a bottom wall of the first accommodation cavity, and the first accommodation groove is used to receive the first damper grease. The knob structure described.   The first receiving groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves. Knob structure.   A second receiving cavity is provided on a side of the bottom wall facing the fixing member, the connecting portion extends and is received in the second receiving cavity, and the engaging portion is The knob structure according to claim 21, wherein the knob structure is formed by extending from the bottom wall of the second accommodation cavity to the first accommodation cavity.   24. The second receiving groove is formed in a bottom wall of the second receiving cavity, and the second receiving groove is used for receiving the second damper grease. The knob structure described.   25. The second accommodation groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves. Knob structure.   The frictional force when the first damper grease is provided between the fixed member and the movable member is that the first damper grease is not provided between the fixed member and the movable member. The knob structure according to any one of claims 1 to 25, wherein the knob structure is smaller than a frictional force at the time.   27. The knob structure according to claim 26, wherein the fixed member and the movable member are made of materials having different hardnesses.   The knob structure according to claim 27, wherein the fixed member is made of an aluminum alloy, and the movable member is made of brass.   When the second damper grease is provided between the rotating member and the movable member, the frictional force is when the second damper grease is not provided between the rotating member and the member. 26. The knob structure according to any one of claims 1 to 25, wherein the knob structure is smaller than the frictional force.   30. The knob structure according to claim 29, wherein the rotating member and the movable member are made of materials having different hardnesses.   The knob structure according to claim 30, wherein the rotating member is made of an aluminum alloy, and the movable member is made of brass. A follow focus remote controller comprising a control device and an angle sensor electrically connected to the control device, the knob structure comprising a fixed member and a rotating member rotatably provided on the fixed member The fixing member includes a receiving portion, the rotating member is provided in the receiving portion, and the knob structure is provided at least movably between the fixing member and the rotating member. And a first damper grease is provided between the at least one movable member and the fixed member, and a second damper grease is provided between the at least one movable member and the rotating member. Further equipped with a knob structure provided with damper grease,
The braking of the first damper grease and the second damper grease is different in magnitude, and the angle sensor is electrically connected to the knob structure, senses rotation angle information of the rotating member, and rotates the rotation. A follow focus remote controller used to transmit angle information to the control device, wherein the control device issues a corresponding control command.   There are a plurality of the movable members, and the plurality of movable members are stacked between the fixed member and the rotating member, and the first damper grease is the fixed member of the plurality of movable members. The second damper grease is provided between one of the plurality of movable members close to the rotating member and the rotating member. The follow focus remote controller according to claim 32, wherein a third damper grease is further provided between the two adjacent movable members to form a plurality of damper grease layers.   34. The follow focus remote controller according to claim 33, wherein the magnitudes of braking by the plurality of damper grease layers are different from each other.   The follow focus remote controller according to claim 33, wherein the magnitude of braking by the plurality of damper grease layers is the same.   The magnitude of braking by a part of the damper grease layer in the plurality of damper grease layers is the same, and the magnitude of braking by another part of the damper grease layer is different from each other. Follow focus remote controller.   The knob structure further includes an adjustment assembly, and the adjustment assembly includes a guide member connected to the fixed member and the rotating member, and an adjustment member movably provided on the guide member, the adjustment member Wherein the movement of the rotating member can be driven to adjust the pressure of the movable member between the rotating member and the fixed member, respectively, under the driving of an external force. Item 33. A follow focus remote controller according to item 32.   38. The adjustment member and the guide member are connected to each other through a screw, and the mounting position of the adjustment member with respect to the guide member can be adjusted by rotating the adjustment member. Follow focus remote controller described in.   The adjusting member is slidably provided on the guide member, a plurality of locking portions are formed on the guide member, and an engaging portion that locks the locking portion is formed on the adjusting member. The adjusting member is selectably lockable with one of the plurality of locking portions so as to adjust the mounting position of the adjusting member with respect to the guide member under the driving of an external force. The follow focus remote controller according to claim 37, wherein the follow focus remote controller is provided.   40. The follow focus remote controller according to claim 39, wherein one of the locking portion and the engaging portion is a groove, and the other is a locking protrusion that engages with the groove.   The adjusting assembly further includes an elastic member, and the elastic member is provided between the adjusting member and the rotating member, and the adjusting member is configured to move the elastic member under an external force. 38. The follow focus remote controller according to claim 37, wherein the pressure of the movable member between the rotating member and the fixed member can be adjusted by adjusting elasticity.   The follow focus remote controller according to claim 41, wherein the adjustment assembly further includes a pressing member, and the pressing member abuts between the elastic member and the adjustment member.   The elastic member is a spiral spring that covers the guide member, and the pressing member includes an outer sleeve member that covers the guide member, and a flange formed on the outer sleeve member. 43. The follow focus remote controller according to claim 42, wherein the sleeve member is inserted into the elastic member and presses the flange against an end of the elastic member.   The pressing member further includes an inner sleeve member that is rotated between the guide member and the outer sleeve member, and a roller that is provided between the inner sleeve member and the outer sleeve member. 44. The follow focus remote controller according to claim 43, wherein the adjustment member abuts on the inner sleeve member.   The rotating member includes a peripheral wall and a bottom wall formed at one end of the peripheral wall, the bottom wall is provided near the fixing member, and an engaging portion is provided in the bottom wall. 38. The follow focus remote controller according to claim 37, wherein the movable member is provided between the fixed member and the engaging portion.   46. The knob structure according to claim 45, wherein the knob structure further includes a connection shaft, the connection shaft passes through the fixing member and the bottom wall, and the guide member is provided on the connection shaft. Follow focus remote controller described.   A through hole is formed through the fixing member, and a covering member is provided in the through hole. The connecting shaft passes through the covering member and connects to the bottom wall, and the connecting shaft The follow focus remote controller according to claim 46, wherein the follow focus remote controller is rotated and connected to the fixed member via the covering member.   The through hole is a step hole, has a step surface, and the covering member includes an outer sleeve member that covers the connection shaft, and a flange formed on the outer sleeve member. 48. The follow focus remote controller according to claim 47, wherein the sleeve member is accommodated in the through hole, and the flange is pressed onto the stepped surface of the through hole.   The covering member further includes an inner sleeve member provided between the connection shaft and the outer sleeve member, and a roller provided between the inner sleeve member and the outer sleeve member. 49. The follow focus remote controller according to claim 48, wherein the shaft passes through the inner sleeve member and is fixedly connected to the inner sleeve member.   The connection shaft includes a socket part, and an insertion contact part and a close contact part formed at both ends of the socket part, the socket part is fixedly connected to the inner sleeve member, and the insertion connection part is Passing through the bottom wall and connecting to the guide member, a diameter of the contact portion is larger than a diameter of the socket portion, and the contact portion contacts an end portion of the inner sleeve member. 50. A follow focus remote controller according to claim 49.   A connection portion is provided in the receiving portion, a first accommodation cavity is opened in the connection portion, the movable member is accommodated in the first accommodation cavity, and the engagement portion is in the first location. 46. The follow focus remote controller according to claim 45, wherein the follow focus remote controller extends into the receiving cavity.   52. A first receiving groove is formed in a bottom wall of the first receiving cavity, and the first receiving groove is used to receive the first damper grease. Follow focus remote controller described.   53. The first receiving groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves. Follow focus remote controller.   A second receiving cavity is provided on a side of the bottom wall facing the fixing member, the connecting portion extends and is received in the second receiving cavity, and the engaging portion is 53. The follow focus remote controller according to claim 52, wherein the follow focus remote controller is formed to extend from the bottom wall of the second storage cavity to the first storage cavity.   55. The second receiving groove is formed in a bottom wall of the second receiving cavity, and the second receiving groove is used for receiving the second damper grease. Follow focus remote controller described.   56. The second receiving groove includes at least one of a plurality of concentric ring grooves, a radial groove, a plurality of concave points, a plurality of long grooves, and a plurality of curved grooves. Follow focus remote controller.   The frictional force when the first damper grease is provided between the fixed member and the movable member is that the first damper grease is not provided between the fixed member and the movable member. 57. The follow focus remote controller according to any one of claims 32 to 56, wherein the follow focus remote controller is smaller than a frictional force at the time.   58. The follow focus remote controller according to claim 57, wherein the fixed member and the movable member are made of materials having different hardnesses.   59. The follow focus remote controller according to claim 58, wherein the fixed member is made of an aluminum alloy, and the movable member is made of brass.   When the second damper grease is provided between the rotating member and the movable member, the frictional force is when the second damper grease is not provided between the rotating member and the member. 57. The follow focus remote controller according to any one of claims 32 to 56, wherein the follow focus remote controller is smaller than the frictional force.   61. The follow focus remote controller according to claim 60, wherein the rotating member and the movable member are made of materials having different hardnesses.   62. The follow focus remote controller according to claim 61, wherein the rotating member is made of an aluminum alloy, and the movable member is made of brass.