CN108150777B - Support arm joint and support arm - Google Patents

Abstract

The application provides a support arm joint and a support arm. The energy-saving device comprises a shell, a rotating part and a main shaft for connecting the rotating part and the shell, wherein a speed reduction unit and an energy storage unit are arranged on the main shaft; the rotating part is arranged on the speed reducing unit, and the speed reducing unit is used for reducing the torque transmitted by the rotating part and transmitting the reduced torque to the main shaft; the energy storage unit applies pretightening force to the main shaft to resist the torque applied to the main shaft, so that the rotating piece can hover at any swinging position. The speed reduction unit can control the transmission ratio and reduce the torque transmitted by the swing arm to the main shaft according to the transmission ratio. The energy storage unit has a large adjustment range, can adjust the pretightening force according to the weights of different displays or swing arms, and has a good hovering effect.

Description

Support arm joint and support arm

Technical Field

The application belongs to the technical field of medical equipment, and relates to a support arm joint and a support arm.

Background

Many ultrasound products are provided with a display mounted on a rotatable articulating arm. The joint support arm is provided with a swing arm and an energy storage element, the energy storage element can adopt a spring or an air spring, and the effect that the display hovers at any position in the air is achieved by balancing the weight of the display and the swing arm through the energy storage element.

When the weight or the variety of the display changes, the weight of the swing arm changes, the energy storage spring is aged and leaked, and other factors occur, the joint support arm does not have the function of readjusting balance, the hovering balance between the joint support arm and the display is damaged, the energy storage element needs to be replaced or the structure of the joint support arm needs to be adjusted to maintain the hovering effect of the display at any position, and the maintenance of the joint support arm is difficult. Because the energy storage component of joint support arm can not adjust, need set up the joint support arm of different specifications according to the display of difference, it is with high costs.

Disclosure of Invention

In view of the above, the present application provides a support arm joint and a support arm.

Specifically, the method is realized through the following technical scheme: a support arm joint comprises a shell, a rotating part and a main shaft for connecting the rotating part and the shell, wherein a speed reduction unit and an energy storage unit are arranged on the main shaft; the rotating part is arranged on the speed reducing unit, and the speed reducing unit is used for reducing the torque transmitted by the rotating part and transmitting the reduced torque to the main shaft; the energy storage unit applies pretightening force to the main shaft to resist the torque applied to the main shaft, so that the rotating piece can hover at any swinging position.

Optionally, the energy storage unit is an energy storage unit capable of adjusting a pre-tightening force applied to the main shaft.

Optionally, the energy storage unit is a clockwork spring energy storage unit, and includes a clockwork spring case and a clockwork spring wound into a spiral shape and located in the clockwork spring case, one end of the clockwork spring is installed on the main shaft, and the other end is installed on the clockwork spring case.

Optionally, an adjusting unit is arranged on the housing, and the adjusting unit abuts against the spring shell and locks the rotation position of the spring shell.

Optionally, be equipped with the regulation tooth that is located the terminal surface on the clockwork spring shell and be located the location tooth of outer peripheral face, the regulation unit is including linking firmly the shell fragment on the casing, shell fragment elasticity butt is in on the location tooth, the regulating part inserts the casing promotes the shell fragment is followed throw off on the location tooth, the regulating part meshing is in drive on the regulation tooth the clockwork spring shell rotates, the clockwork spring shell rotates the drive clockwork spring deformation.

Optionally, the speed reduction unit is a small tooth difference gear speed reduction unit that reduces torque transmitted to the main shaft.

Optionally, the few-tooth-difference gear reduction unit comprises a first gear tooth positioned on the rotating part, a planetary gear eccentrically arranged on the main shaft and a second gear tooth positioned on the shell, wherein the planetary gear is provided with a third gear tooth and a fourth gear tooth, the first gear tooth is meshed with the third gear tooth, the fourth gear tooth is meshed with the second gear tooth, the first gear tooth drives the planetary gear to rotate, the planetary gear winds the second gear tooth to revolve, the spring energy storage unit balances the torque transmitted by the main shaft, and the torque is reduced according to the transmission ratio by the few-tooth-difference gear reduction unit.

Optionally, an eccentric sleeve is mounted on the main shaft, and the planetary gear is mounted on the eccentric sleeve.

Optionally, a mounting hole is formed in the shell, a cylindrical connecting portion is arranged on the rotating member, the connecting portion is inserted into the mounting hole and connected with the speed reducing unit, and the axis of the connecting portion coincides with the axis of the mounting hole.

Optionally, the connecting portions are symmetrically arranged on the rotating member, the connecting portions are inserted into two ends of the mounting hole, and the connecting portion on one side is connected with the speed reducing unit.

Optionally, an adjusting block is disposed between the connecting portion and the mounting hole.

Optionally, the spindle further comprises a locking unit, the locking unit comprises a locking plate mounted on the spindle and a locking mechanism hinged to the housing, the locking mechanism rotates and is clamped with the locking plate, and the rotating member is locked at a swinging position; or the locking mechanism rotates and is separated from the locking plate, and the rotating piece can be opened to any swinging position.

Optionally, the locking mechanism includes an unlocking plate hinged to the housing, an elastic member and an unlocking assembly connected to two ends of the unlocking plate respectively, the elastic member is tensioned to the housing, the unlocking assembly pushes the unlocking plate to rotate, and the elastic member contracts to drive the unlocking plate to be locked to the locking plate; the unlocking assembly retracts to drive the unlocking plate to rotate, and the locking of the locking plate is released by the unlocking plate.

Optionally, the locking plate is provided with at least one locking tooth, and the unlocking plate is fixedly provided with a locking pin, and the locking pin can be locked on the at least one locking tooth by rotating the unlocking plate.

Optionally, the unblock subassembly is including rotating the connection connecting rod on the casing, connect respectively the unblock pole and the release link at connecting rod both ends, the unblock pole with the release link is all slided and is established on the casing, the unblock board is connected on the connecting rod, the unblock pole is removed right the locking of connecting rod, the release link drives the connecting rod rotates, the unblock board is along with the connecting rod removes.

Optionally, a sliding groove is formed in one end of the reset rod in the axis direction, the connecting rod penetrates through and abuts against the sliding groove, an elastic element is mounted at the other end of the reset rod, and the elastic element abuts against the shell.

Optionally, one end of the unlocking rod is hinged to the connecting rod, a button seat is installed at the other end of the unlocking rod, a pressing key and a spring piece are arranged in the button seat, the button seat is fixedly connected to the shell, and the spring piece pushes the pressing key to enable the unlocking rod to tighten the connecting rod.

Optionally, the casing is equipped with the arc surface, be equipped with first spacing portion and second spacing portion on the arc surface, rotate the swing between first spacing portion and second spacing portion.

The application also discloses a support arm, which comprises a swing arm and a mounting seat, wherein a display is mounted on the swing arm; the swing arm is installed on the rotating part, and the shell is installed on the mounting seat.

Optionally, an installation sleeve is installed in the installation seat, the housing is inserted into the installation sleeve, a fixing plate is installed at the end of the housing, and the fixing plate pulls the housing to be clamped on the installation sleeve.

Optionally, the mounting base is provided with at least one positioning groove, the at least one positioning groove is parallel to the axis of the mounting base, and the arm joint can rotate around the axis of the mounting base and is limited to one positioning groove.

The technical scheme provided by the embodiment of the application can have the following beneficial effects:

the speed reduction unit and the spring energy storage unit are arranged on the main shaft to balance the torque transmitted by the display, the preset torque of the adjustable spring energy storage unit is convenient to adjust, and the length of the swing arm can be set according to needs by the support arm joint, so that the swing range of the display is convenient to adjust. The speed reduction unit can control the transmission ratio and reduce the torque transmitted by the swing arm to the main shaft according to the transmission ratio. The adjusting range of the spring energy storage unit is large, the pretightening force can be adjusted according to the weights of different displays or swing arms, the hovering effect is good, and the adjustment is convenient.

Drawings

FIG. 1 is a schematic diagram of a mounting arm according to an exemplary embodiment of the present application.

Fig. 2 is a schematic diagram of an exploded structure of a mounting arm according to an exemplary embodiment of the present application.

FIG. 3 is a cross-sectional view of an angle of a mounting arm according to an exemplary embodiment of the present application.

FIG. 4 is a cross-sectional view of an alternative angle of a mounting arm according to an exemplary embodiment of the present application.

Fig. 5 is an exploded view of the reduction unit and the adjustment unit in the arm joint according to an exemplary embodiment of the present application.

Fig. 6 is a schematic diagram illustrating an explosive structure of a deceleration unit and a clockwork energy storage unit in a joint of a support arm according to an exemplary embodiment of the present application.

FIG. 7 is a schematic diagram of a locking unit in an arm joint according to an exemplary embodiment of the present application.

FIG. 8 is a schematic diagram illustrating a mount configuration in an arm joint according to an exemplary embodiment of the present application.

FIG. 9 is a block diagram illustrating the construction of the housing in the arm joint according to one exemplary embodiment of the present application.

Wherein, the housing 10; a mounting hole 11; a first stopper portion 12; a second stopper 13; an arcuate surface 14; a through hole 15; a guide hole 16; a key hole 17; a rotating member 20; a connecting portion 21; a main shaft 30; an eccentric sleeve 31; a locking plate 32; the locking teeth 321; an adjusting block 33; a speed reduction unit 40; a first gear tooth 41; second gear teeth 42; a planetary gear 43; a third wheel tooth 431; a fourth cog 432; an energy storage unit 50; a spring case 51; the adjustment teeth 511; a positioning tooth 512; a spring 52; a connecting sleeve 53; a locking unit 60; a locking mechanism 61; an unlocking plate 611; with a lock 612; an elastic member 613; an unlocking assembly 62; a connecting rod 621; an unlocking lever 622; a body portion 6221; a button holder 6222; pressing the key 6223; a reset lever 623; a slide groove 6231; a resilient element 6232; a mounting seat 70; a stepped hole 71; a positioning groove 72; a flange table 73; a mounting sleeve 74; a fixed plate 75; a swing arm 80; an adjustment unit 90; the adjusting member 91.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

As shown in fig. 1 to 4, in an exemplary embodiment, an arm is shown, which includes an arm joint, a mounting base 70 and a swing arm 80, wherein a display is mounted on the swing arm 80, or some other device is mounted on the swing arm 80; the swing arm 80 is mounted on the rotatable member 20 within the arm joint. The arm joint comprises a shell 10, a rotating part 20 and a main shaft 30 connecting the rotating part 20 and the shell 10, wherein the main shaft 30 is positioned in the shell 10. Both ends of the main shaft 30 can penetrate the housing 10, and the rotating member 20 is mounted on the main shaft 30 to rotate around the main shaft 30. A speed reduction unit 40 and an energy storage unit 50 are mounted on the main shaft 30, and the speed reduction unit 40 and the energy storage unit 50 are located in the housing 10. The rotation member 20 is mounted on the speed reduction unit 40, the rotation member 20 rotates to drive the speed reduction unit 40 to rotate, and the speed reduction unit 40 is used for reducing the torque transmitted by the rotation member 20 and transmitting the reduced torque to the main shaft 30. The energy storage unit 50 has a pre-tightening force, and the pre-tightening force acts on the main shaft 30 to form a torque force for resisting the torque applied to the main shaft 30.

When the rotation member 20 rotates around the housing 10, the reduction unit 40 may proportionally reduce the rotation speed of the rotation member 20, and at the same time, the torque generated by the rotation member 20 is proportionally reduced by the reduction unit 40 and transmitted to the main shaft 30. Since the torque transmitted by the main shaft 30 is balanced with the torque generated by the pre-tightening force of the energy storage unit 50, the rotating member 20 can hover at any swing position. The length and the shape of the swing arm 80 can be processed as required, the swing arm 80 is fixedly connected to the rotating part 20, the swing arm 80 can drive the rotating part 20 to rotate, the swing range is flexibly set, and the swing arm 80 is convenient to install.

As shown in fig. 3 and 6, a speed reduction unit 40 and an energy storage unit 50 are mounted on the main shaft 30, wherein the speed reduction unit 40 may be provided as a gear reduction mechanism, and the rotation speed and the torque force transmitted by the rotation member 20 are reduced by the speed reduction unit 40 according to a transmission ratio. Through the torque that the speed reduction unit 40 reduces in proportion, the energy storage unit 50 only needs to set up less balanced moment of torsion and can resist the moment of torsion that main shaft 30 transmitted, makes swing arm 80 keep balance, and it is convenient to adjust. The torque generated by the rotor 20 is transmitted and reduced through the speed reduction unit 40, the range of the rotation angle of the rotor 20 is small, the rotation angle transmitted to the main shaft 30 is correspondingly reduced, and the strain of the energy storage unit 50 is small. The torque variation generated by the pretightening force of the energy storage unit 50 acting on the main shaft 30 is small.

As shown in fig. 3 and 8, a flange-shaped mounting sleeve 74 is mounted in the mounting seat 70, a stepped hole 71 is formed in the mounting seat 70, two mounting sleeves 74 are provided, the two mounting sleeves 74 are respectively inserted into the mounting seat 70 from two ends of the mounting seat 70 along the stepped hole 71, and the mounting sleeves 74 abut against a stepped surface of the mounting seat 70. The housing 10 is inserted into and mounted on the mounting sleeve 74, the fixing plate 75 is mounted on the end of the housing 10, the fixing plate 75 abuts against the mounting seat 70 and pulls the housing 10 against the mounting sleeve 74, so that the housing 10 is mounted on the mounting seat 70. By providing the mounting sleeve 74 in the mounting seat 70, the connection position and the connection angle between the housing 10 and the mounting seat 70 can be adjusted. The fixing plate 75 on the housing 10 draws the housing 10 tightly against the mounting seat 70, and the connecting position of the housing 10 is arranged inside the mounting seat 70, so that the appearance of the outside of the mounting seat 70 is not affected, and the appearance is beautiful. The flange table 73 for fixing the mounting base 70 is arranged on the periphery of the mounting base 70 in a protruding mode, so that the support arm can be fixed to equipment or a support column, and mounting is convenient.

As shown in fig. 3 and 5, the energy storage unit 50 is an adjustable energy storage unit, and the energy storage unit can adjust the pre-tightening force applied to the main shaft 30. In one embodiment, the energy storage unit is a spring energy storage unit, which includes a spring case 51 and a spirally wound spring 52 disposed in the spring case 51, wherein one end of the spring 52 is mounted on the main shaft 30, and the other end is mounted on the spring case 51. The spring energy storage unit adopts a spiral spring 52 as an energy storage member, and the spring 52 can apply a pre-tightening force on the main shaft 30. When the main shaft 30 rotates, the spring 52 can be driven to expand or contract, and the pre-tightening force and the torque transmitted by the main shaft 30 are mutually offset by the spring 52. The working length of spring 52 is much greater than the length of deformation produced by the angle of rotation of mainshaft 30. The support arm joint is applied to the support arm, and the swing range of support arm can not exceed 360 degrees. Further, the swing range of the arm application is mainly focused on the swing within the angle range of 90 degrees, and the rotation angle range of the main shaft 30 is small, so that the deformation amount of the spring 52 is small. Therefore, the torque transmitted by the main shaft 30 is always balanced with the torque generated by the pre-tightening force of the spring 52. Wherein, the clockwork energy storage unit is provided with a connecting sleeve 53, the connecting sleeve 53 is fixedly connected on the main shaft 30, and one end of the clockwork 52 is fixedly connected on the connecting sleeve 53. The connecting sleeve 53 is arranged, so that the spring 52 can be conveniently fixed, the defect that the main shaft 30 needs to be grooved when the spring 52 is arranged on the main shaft 30 is avoided, the strength of the main shaft 30 is guaranteed, the spring shell 51 can be adjusted to be arranged on the connecting sleeve 53 as required, and the installation is convenient.

In an exemplary embodiment, an adjusting unit 90 is provided on the case 10, and the adjusting unit 90 abuts on the spring case 51 and locks the rotational position of the spring case 51. The adjusting unit 90 locks the position of the spring case 51 on the main shaft 30, and can make the spring energy storage unit have stable torque force. Meanwhile, the spring energy storage unit can be adjusted, different torque forces can be adjusted according to different swing arms or different displays, and adjustment is convenient.

As shown in fig. 3 and 5, in a specific embodiment, the spring case 51 has a disk shape, and the spring case 51 is provided with an adjustment tooth 511 on an end surface and a positioning tooth 512 on an outer peripheral surface. The regulating teeth 511 are arranged on the end surface of the spring shell 51, the regulating teeth 511 are arranged in a plurality of continuous meshing teeth, and the regulating teeth 511 are parallel to the axis of the spring shell 51. Mainshaft 30 passes through spring case 51, the axis of mainshaft 30 coincides with the axis of spring case 51, and spring 52 is fitted in spring case 51 and wound around mainshaft 30. More than one regulating tooth 511 and positioning tooth 512 are uniformly distributed on the spring shell 51. The adjusting unit 90 includes a spring plate fixed to the housing 10, and the spring plate elastically abuts against a positioning tooth 512 to lock the position of the spring housing 51. When the adjusting piece 91 is inserted into the housing 10 and pushes the spring plate to disengage from the positioning teeth 512, the adjusting piece 91 engages with the adjusting teeth 511 to rotate the spring shell 51, and the spring shell 51 rotates to deform the spring 52. The adjusting piece 91 is arranged in a key shape and is inserted into the shell 10 from the outside of the shell 10, the adjusting piece 91 pushes the spring plate to be separated from the positioning teeth 512, the locking of the clockwork shell 51 is released, the adjusting piece 91 is meshed with the adjusting teeth 511, the clockwork shell 51 is rotated around the main shaft 30 by rotating the adjusting piece 91, then, the clockwork spring 52 is driven to deform, a new pretightening force is generated, the pretightening force can mutually confront with the torque transmitted by the energy storage unit 50 after the swing arm 80 or the display is adjusted, and a new balance is formed.

A keyhole 17 can be formed on the housing 10, the adjusting piece 91 passes through the keyhole 17 and engages the key with the adjusting tooth 511, the key pushes against the adjusting tooth 511 to rotate the clockwork shell 51, the clockwork shell 51 drives the clockwork 52 to deform, that is, the clockwork shell 51 rotates to drive the clockwork 52 to contract or expand, so as to adjust the pre-tightening force of the clockwork 52 on the main shaft 30. The adjusting teeth 511 for adjusting the pretightening force of the spring 52 are arranged on the spring shell 51, and the pretightening force of the spring 52 can be adjusted in the processes of initial debugging or later maintenance, so that the pretightening force of the spring 52 can be balanced with the torque transmitted by the rotating part 20 all the time, and the adjusting is convenient and the maintenance is simple.

In an exemplary embodiment, the reduction unit 40 is a small differential gear reduction unit that reduces the torque transmitted to the main shaft 30.

As shown in fig. 3 and 6, in a specific embodiment, the small teeth difference gear reduction unit includes first gear teeth 41 on the rotation member 20, a planetary gear 43 eccentrically mounted on the main shaft 30, and second gear teeth 42 on the housing 10. Wherein, the first gear teeth 41 can be directly processed on the rotating member 20, or can be processed into a gear shape and fixedly connected to the rotating member 20; the second gear teeth 42 can be directly formed on the housing 10 or formed in a gear shape to be fixedly connected to the housing 10. The planet gear 43 is provided with a third gear 431 and a fourth gear 432, i.e. the planet gear 43 is a double gear, the first gear 41 is engaged on the third gear 431 and the fourth gear 432 is engaged on the second gear 42. Swinging the rotating member 20, the first gear 41 rotates the planetary gear 43 and the planetary gear 43 revolves around the second gear 42, and the main shaft 30 transmits the proportionally reduced torque to the spring energy storage unit. The small teeth difference gear speed reducing unit adopts the principle of small teeth difference gear transmission, the rotation of the rotating part 20 is used as a driving force, the first gear teeth 41 drive the planetary gear 43 to rotate, the planetary gear 43 is meshed with the second gear teeth 42 through the fourth gear teeth 432, and the second gear teeth 42 are fixedly arranged on the shell 10. The main shaft 30 is driven by the planetary gear 43 to rotate around the axis, and the rotation speed and the received torque can be reduced according to the proportion of the transmission ratio.

For example, a swing arm 80 of 200mm is mounted on the rotating member 20, a display of 5kg is mounted at the end of the swing arm 80, the swing adjustment range of the rotating member 20 is 60 degrees, the first gear teeth 41 receive a torque of 10Nm and transmit the torque to the planetary gear 43 and the second gear teeth 42, and when the gear ratio of the gear train is 1/40, the torque received by the inner shaft is 0.25 Nm. The pre-set preload of spring 52 produces a torque of 0.25Nm, where the working length of spring 52 is set to 1.7 m. The swing adjusting range of the rotating member 20 is 60 degrees, the rotating angle of the spring 52 is small, the spring force change is small, and the swing arm 80 can be suspended at any swing position.

The main shaft 30 may be partially formed as an eccentric shaft or an eccentric sleeve 31 is mounted on the main shaft 30, and the planetary gear 43 is mounted on a biased portion of the main shaft 30 or on the eccentric sleeve 31. The planetary gear 43 is mounted on the eccentric sleeve 31. Between the planet gears 43 and the eccentric shaft or sleeve 31, self-lubricating sliding bearings are mounted. Wherein, when the planetary gear 43 is made of nylon material, the planetary gear 43 can be directly mounted on the eccentric shaft or the eccentric sleeve 31. The eccentric sleeve 31 is arranged on the main shaft 30, the main shaft 30 is an optical axis, the machining is convenient, the eccentric sleeve 31 can be finely machined, and the machining cost of the main shaft 30 is reduced. With the eccentric sleeve 31, the meshing position of the planetary gear 43 with the first gear teeth 41 and the second gear teeth 42 can be easily adjusted.

As shown in fig. 2 and 9, in one embodiment, a mounting hole 11 penetrating through the housing 10 is formed on the housing 10, a connecting portion 21 having a cylindrical shape is formed on the rotating member 20, the connecting portion 21 and the rotating member 20 form a flange shape, the rotating member 20 is attached to a side wall of the housing 10, the connecting portion 21 is inserted into the mounting hole 11 and connected to the speed reducing unit 40, and an axis of the connecting portion 21 coincides with an axis of the mounting hole 11. The first gear 41 is disposed on the connecting portion 21 and engaged with the third gear 431.

The connecting part 21 is matched with the mounting hole 11 to form a guiding and limiting function, the mounting position is accurate, and the meshing position of the rotating part 20 and the planetary gear 43 is accurate. When the rotating member 20 rotates, the connecting portion 21 can limit the swing arm 80 to rotate around the axis of the mounting hole 11, and the rotation is smooth.

As shown in fig. 2, two connecting portions 21 are oppositely disposed on the rotating member 20, the two connecting portions 21 and the rotating member 20 form a symmetrical structure in a shape of "U", the two connecting portions 21 are respectively inserted into two ends of the mounting hole 11, and the rotating member 20 is attached to the mounting hole 11. The main shaft 30 has both ends penetrating the rotation member 20 and fixed to the rotation member 20, and a connection portion 21 at one side thereof is connected to the reduction unit 40 and a connection portion 21 at the other side thereof is adjacent to the spring energy storage unit. The two collinear connecting parts 21 are arranged on the rotating part 20, so that the rotation is stable and the change range is small.

As shown in fig. 3, an adjusting block 33 is optionally provided between the connecting portion 21 and the mounting hole 11. Adjusting block 33 overlaps on connecting portion 21, and with mounting hole 11 phase-match, the flange structure of "L" shape that the symmetry set up can be set to the cross-section of adjusting block 33, including guide part and flange portion, connecting portion 21 inserts the guide part, and insert the guide part into mounting hole 11 to the flange portion support and lean on the lateral wall at casing 10, rotates piece 20 and laminates on flange portion. The adjusting block 33 can adjust the mutual matching position between the rotating part 20 and the shell 10 and the matching gap between the two, and the adjustment is convenient.

As shown in FIGS. 4 and 7, the arm joint further includes a locking unit 60, and the locking unit 60 includes a locking plate 32 mounted on the spindle 30 and a locking mechanism 61 hingedly mounted on the housing 10. The locking plate 32 may be attached to the spindle 30 or to the eccentric sleeve 31 by a fastener, and a spacer is provided between the locking plate 32 and the reduction unit 40 to adjust the gap between the locking plate 32 and the locking mechanism 61 and the position of engagement therebetween. The locking mechanism 61 is rotated to enable the locking mechanism 61 to be clamped with the locking plate 32, the rotating piece 20 cannot rotate, and the whole body is kept at a swinging position; the rotation of the locking mechanism 61 disengages the locking mechanism 61 from the locking plate 32 and the rotary member 20 can rotate and can open to hover at any swing position.

The arm joint is in an unlocked state for a long time, the rotary member 20 can rotate around the housing 10, and the locking unit 60 is provided on the arm joint. In a state where arm joint locking is required, the locking unit 60 can lock the rotation of the spindle 30, so as to maintain the rotation member 20 at a swing position, such as moving the arm, and lock the arm joint during arm joint transportation. The function stability of the joint of the support arm is protected, and particularly in the process of moving the support arm, the joint of the support arm can be locked to effectively protect the display to be stable and not to swing easily in the moving process.

With continued reference to fig. 7, the locking mechanism 61 includes an unlocking plate 611 hingedly mounted to the housing 10, an elastic member 613 respectively coupled to both ends of the unlocking plate 611, and an unlocking member 62, the elastic member 613 being coupled to the housing 10. The unlocking plate 611 is formed in an "L" shape as a whole, and includes a connecting end and a locking end, the intersection of which is hinged to the housing 10, an elastic member 613 is connected to the locking end and has an elastic force for pulling the locking end to rotate toward the locking plate 32, and the connecting end is connected to the unlocking assembly 62. Wherein the unlocking assembly 62 maintains the locking end in the unlocked state.

At least one locking tooth 321 is arranged on the circumference of the locking plate 32, the locking teeth are distributed along the radial direction of the locking plate 32, a locking pin 612 is fixedly arranged on the unlocking plate 611, and the locking pin 612 is perpendicular to the connecting end. Pushing the unlocking assembly 62 rotates the connecting end of the unlocking plate 611, the elastic member 613 contracts to rotate the unlocking plate 611, the locking pin 612 can be limited on the at least one locking tooth 321, and the unlocking plate 611 is locked to the locking plate 32. The unlocking assembly 62 retracts to drive the unlocking plate 611 to rotate, the unlocking assembly 62 drives the unlocking plate 611 to overcome the elastic force of the elastic piece 613, and the unlocking plate 611 unlocks the locking plate 32 and maintains the unlocking state of the unlocking plate 611.

The unlocking member 62 overcomes the elastic force acting on the unlocking plate 611 to maintain the unlocking plate 611 in the unlocked state, and the rotation member 20 can normally rotate. When the unlocking assembly 62 releases the locking of the locking plate 32, the elastic member 613 can drive the unlocking plate 611 to rotate, so that the locking pin 612 is locked on the locking tooth 321, the arm joint is locked, and the locking is convenient. When the unlocking plate 611 is arranged in an L shape, a larger swing space can be provided, and the movement locus is easy to control.

With continued reference to fig. 7, the unlocking assembly 62 includes a connecting rod 621 rotatably connected to the housing 10, the middle portion of the connecting rod 621 is hinged to the housing 10, an unlocking rod 622 connected to one end of the connecting rod 621, and a reset rod 623 connected to the other end of the connecting rod 621, wherein the reset rod 623, the unlocking rod 622 and the connecting rod 621 are located on the same plane, a through hole 15 is formed in the housing 10, the middle portion of the connecting rod 621 is mounted on the rotating shaft and passes through the through hole 15, and the unlocking rod 622 and the reset rod 623 are both slidably disposed on the housing 10. A guide hole 16 or a groove is formed in the housing 10, and the unlocking lever 622 and the reset lever 623 are slidably mounted in the guide hole 16 or the groove. A sliding groove 6231 is formed in one end of the reset rod 623 along the axial direction, the connecting rod 621 penetrates through the sliding groove 6231, an elastic element 6232 is mounted at the other end of the reset rod 623, the elastic element 6232 abuts against the shell 10, the connecting rod 621 rotates and drives the reset rod 623 to move, the reset rod 623 compresses the elastic element 6232 on the shell 10, and after the connecting rod 621 resets, the elastic element 6232 drives the reset rod 623 to reset. The connecting end of the unlocking plate 611 is connected to the link 621, and the unlocking plate 611 is located at the intersection of the link 621 and the reset lever 623.

One end of the unlocking rod 622 is hinged to the connecting rod 621, a connecting column is vertically arranged on the connecting rod 621, the unlocking rod 622 is provided with a body portion 6221, the body portion 6221 can be made of a rope or a rod-shaped material, the end portion of the unlocking rod 622 is annularly sleeved on the connecting column, a button seat 6222 is arranged at the other end of the unlocking rod 622, a pressing key 6223 and a spring member are arranged in the button seat 6222, the button seat 6222 is fixedly connected to the shell 10, the spring member pushes the pressing key 6223 to enable the unlocking rod 622 to strain the connecting rod 621, when the pressing key 6223 is compressed into the button seat 6222, the connecting rod 621 rotates around a hinged point to drive the unlocking plate 611 to rotate, the unlocking plate 611 is locked to the locking plate 32, and the arm joint. The push key 6223 is ejected out of the button holder 6222, the link 621 rotates around the hinge point to drive the reset rod 623 to retract, the unlocking plate 611 rotates under the driving of the elastic element 613, the unlocking plate 611 unlocks the locking plate 32, and the arm joint can swing freely. The rotation and locking of the arm joint can be controlled through the unlocking rod 622, and the operation is convenient.

In another embodiment of the unlocking lever 622, a guide hole 16 or a groove is formed in the housing 10, the unlocking lever 622 rotates around a hinge point on the connecting rod 621, and the unlocking lever 622 pulls the connecting rod 621 to rotate, so that the button holder 6222 is clamped in the guide hole 16 or the groove. So that the link 621 can drive the unlocking plate 611 to rotate, and lock the locking plate 32.

As shown in fig. 4 and 9, in an exemplary embodiment, a partial arc surface 14 is provided on the housing 10, a first stopper portion 12 and a second stopper portion 13 protruding from the arc surface 14 are provided on the arc surface 14, the rotating member 20 swings between the first stopper portion 12 and the second stopper portion 13, and the rotating member 20 may abut on the first stopper portion 12 or the second stopper portion 13. The rotation range of the rotating part 20 is limited between the first limiting part 12 and the second limiting part 13, the limit swing range of the swing arm 80 can be controlled, the operation of the support arm is protected to be stable, the swing arm 80 can be supported during overload, the display cannot be separated from the swing arm 80, and the use of the display is safe.

As shown in fig. 8, in an exemplary embodiment, at least one positioning groove 72 is formed on the mounting seat 70, the positioning grooves 72 are distributed on the inner side wall of the stepped hole 71, and the at least one positioning groove 72 is parallel to the axis of the mounting seat 70. After the housing 10 is mounted in the stepped hole 71, it can rotate around the stepped hole 71, i.e. the arm joint can rotate around the axis of the mounting seat 70, and the end of the reset rod 623 protrudes out of the housing 10 and is clamped into a positioning groove 72. The positioning groove 72 is formed in the inner side wall of the mounting seat 70, and the position of the arm joint on the mounting seat 70 can be limited through the matching between the reset rod 623 and the positioning groove 72, so that the swinging direction of the swing arm 80 can be adjusted conveniently. The position of the arm joint locked on the mounting seat 70 can also be limited by the form of clamping into the positioning groove 72 by other connecting rods 621 or bosses, and the like, so that the mounting is convenient.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (17)

1. A support arm joint comprises a shell, a rotating part and a main shaft for connecting the rotating part and the shell, and is characterized in that a speed reduction unit and an energy storage unit are mounted on the main shaft; the rotating part is arranged on the speed reducing unit, and the speed reducing unit is used for reducing the torque transmitted by the rotating part and transmitting the reduced torque to the main shaft; the energy storage unit applies pretightening force to the main shaft to resist torque borne by the main shaft so that the rotating part can be suspended at any swing position, the energy storage unit is a clockwork energy storage unit and comprises a clockwork shell and a clockwork spring coiled into a spiral shape and positioned in the clockwork shell, one end of the clockwork spring is installed on the main shaft, the other end of the clockwork spring is installed on the clockwork shell, the clockwork shell can rotate relative to the main shaft under the action of external force, the shell is provided with an adjusting unit which is abutted against the clockwork shell and locks the rotation position of the clockwork shell, wherein the clockwork shell is provided with adjusting teeth positioned on the end surface and positioning teeth positioned on the peripheral surface, the adjusting unit comprises a spring piece fixedly connected on the shell, the spring piece is abutted against the positioning teeth, and the adjusting piece is inserted into the shell and, the adjusting piece is meshed with the adjusting teeth to drive the clockwork spring shell to rotate, and the clockwork spring shell rotates to drive the clockwork spring to deform.

2. The arm joint according to claim 1, wherein said speed reduction unit is a small differential gear speed reduction unit that reduces torque transmitted to said main shaft.

3. The arm joint according to claim 2, wherein the small tooth difference gear reduction unit includes a first gear tooth on the rotating member, a planetary gear eccentrically mounted on the main shaft, and a second gear tooth on the housing, the planetary gear being provided with a third gear tooth and a fourth gear tooth, the first gear tooth being engaged with the third gear tooth, the fourth gear tooth being engaged with the second gear tooth, the first gear tooth rotating the planetary gear and the planetary gear revolving around the second gear tooth, the spring energy storage unit balancing torque transmitted by the main shaft, the torque being reduced in gear ratio by the small tooth difference gear reduction unit.

4. The arm joint of claim 3, wherein said spindle has an eccentric sleeve mounted thereon, and said planet gear is mounted on said eccentric sleeve.

5. The arm joint according to claim 1, wherein the housing has a mounting hole, the rotary member has a cylindrical connecting portion inserted into the mounting hole and connected to the reduction unit, and an axis of the connecting portion coincides with an axis of the mounting hole.

6. The arm joint according to claim 5, wherein the connecting portions are symmetrically provided on the rotary member, the connecting portions are inserted into both ends of the mounting hole, and the connecting portion on one side is connected to the speed reducing unit.

7. The arm joint of claim 6 wherein an adjustment block is disposed between said attachment portion and said mounting hole.

8. The arm joint according to claim 1, further comprising a locking unit including a locking plate mounted on said spindle and a locking mechanism hingedly mounted on said housing, said locking mechanism rotating and engaging said locking plate, said rotating member being locked in a swing position; or the locking mechanism rotates and is separated from the locking plate, and the rotating piece can be opened to any swinging position.

9. The arm joint of claim 8, wherein the locking mechanism comprises an unlocking plate hinged to the housing, an elastic member and an unlocking assembly connected to two ends of the unlocking plate, the elastic member is tensioned to the housing, the unlocking assembly pushes the unlocking plate to rotate, and the elastic member contracts to lock the unlocking plate to the locking plate; the unlocking assembly retracts to drive the unlocking plate to rotate, and the locking of the locking plate is released by the unlocking plate.

10. The arm joint according to claim 9, wherein said locking plate is provided with at least one locking tooth, and said unlocking plate is provided with a locking pin, and rotation of said unlocking plate causes said locking pin to be locked to said at least one locking tooth.

11. The arm joint of claim 9, wherein the unlocking assembly comprises a connecting rod rotatably connected to the housing, and an unlocking rod and a reset rod respectively connected to two ends of the connecting rod, the unlocking rod and the reset rod are slidably arranged on the housing, the unlocking plate is connected to the connecting rod, the unlocking rod unlocks the connecting rod, the reset rod drives the connecting rod to rotate, and the unlocking plate moves along with the connecting rod.

12. The arm joint of claim 11, wherein a sliding groove is formed in one end of the release link along the axial direction, the link passes through and abuts against the sliding groove, and an elastic element is mounted at the other end of the release link and abuts against the housing.

13. The arm joint of claim 12, wherein one end of the unlocking lever is hinged to the connecting rod, the other end of the unlocking lever is provided with a button seat, a pressing key and a spring member are arranged in the button seat, the button seat is fixedly connected to the housing, and the spring member pushes the pressing key to enable the unlocking lever to tension the connecting rod.

14. The arm joint of claim 1, wherein said housing defines an arcuate surface, said arcuate surface defining a first stop portion and a second stop portion, said rotatable member being pivotable between said first stop portion and said second stop portion.

15. A support arm comprises a swing arm and a mounting seat, wherein a display is mounted on the swing arm; an arm joint according to any one of claims 1 to 14, further comprising a swing arm mounted on said rotatable member, said housing being mounted on said mounting base.

16. An arm according to claim 15, wherein a mounting sleeve is mounted in the mounting seat, the housing is inserted into the mounting sleeve, and a fixing plate is mounted at the end of the housing, and pulls the housing to be clamped on the mounting sleeve.

17. An arm according to claim 16 wherein the mounting block defines at least one detent, the at least one detent being parallel to the axis of the mounting block, the arm joint being rotatable about the axis of the mounting block and being confined to one of the detents.

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