Rotary adjusting device

Abstract

The utility model provides a rotation adjusting device. The rotation adjusting device comprises a worm gear, a worm and a worm seat for fixing the worm. In the coarse adjustment mode, the worm gear and the worm are in a non-meshing state, and the worm gear is directly rotated to adjust the angle of the worm gear; in the fine adjustment mode, the worm gear and the worm are in an engaged state, the worm is rotated to drive the worm gear to adjust the angle of the worm gear, and therefore the angle adjustment precision can be guaranteed, and meanwhile the adjustment efficiency can be improved.

Description

Technical Field

[0001] The present application relates to a rotation adjustment device capable of adjusting an angle efficiently and accurately. Background Art

[0002] In actual application scenarios, it is often necessary to accurately and efficiently adjust the rotation angle of the target device. Taking intracavitary ultrasound as an example, the axial rotation of the ultrasound probe needs to be quickly and accurately positioned, and it needs to be locked after rotating to a predetermined angle so that it is not easily disturbed by external forces and causes angle changes.

[0003] In the prior art, the self-locking performance of a single-head worm gear is used to achieve precise adjustment and positioning of small angles. However, adjusting the rotation angle of the worm wheel via the worm gear is time-consuming and labor-intensive, and the adjustment efficiency is not ideal.

[0004] Therefore, in the prior art, there is a technical problem of how to adjust the angle efficiently and accurately. Utility Model Content

[0005] The purpose of the present application is to provide a rotation adjustment device that can adjust the angle efficiently and accurately. In order to achieve the above purpose, one scheme of the present application is a rotation adjustment device, comprising a worm wheel, a worm and a worm seat for fixing the worm; comprising a coarse adjustment mode and a fine adjustment mode; in the coarse adjustment mode, the worm wheel and the worm are in a non-meshing state, and the worm wheel is directly rotated to adjust its angle; in the fine adjustment mode, the worm wheel and the worm are in a meshing state, and the worm is rotated to drive the worm wheel to adjust its angle.

[0006] According to the aforementioned technical solution, the worm wheel angle can be fine-tuned or coarse-tuned by meshing or disengaging the worm wheel and the worm. By combining the two modes, both accuracy and high efficiency of angle adjustment can be achieved.

[0007] In a preferred embodiment, it also includes a switching unit that is transmission-connected to the worm seat; when switching from the fine-tuning mode to the coarse-tuning mode, the worm seat is driven by the switching unit to move in a direction away from the worm wheel, thereby separating the worm from the worm wheel; when switching from the coarse-tuning mode to the fine-tuning mode, the worm seat is driven by the switching unit to move in a direction close to the worm wheel, thereby engaging the worm with the worm wheel.

[0008] According to the aforementioned technical solution, the worm and the worm wheel can be easily engaged or disengaged, thereby switching between the fine adjustment mode and the coarse adjustment mode.

[0009] In a preferred embodiment, the switching unit includes a pressing member and a pushing member. The pushing member includes a first supporting member capable of supporting the worm seat. A first groove is provided on a side of the worm seat away from the worm. The worm seat further has a guiding surface that extends obliquely away from the worm. In the fine-tuning mode, the pushing member is located on a side of the worm seat away from the worm, the first supporting member abuts against the worm seat, and the pressing member is correspondingly arranged with the guiding surface. When it is necessary to switch from the fine-tuning mode to the coarse-tuning mode, the pushing member is driven to move along the extending direction of the worm, i.e., the first direction. The first supporting member enters the first groove, the pressing member slides relatively along the guiding surface, and the worm seat is pushed to move away from the worm gear through the guiding surface, thereby driving the worm to separate from the worm gear.

[0010] According to the foregoing technical solution, by pushing the pushing member, the pressing member moves the worm seat away from the worm gear through the guiding surface, and then the worm is separated from the worm gear. After that, the worm gear can be directly rotated to adjust its angle.

[0011] In a preferred embodiment, the worm seat is further connected with a worm seat elastic member. As the worm seat moves away from the worm gear, the worm seat elastic member deforms and stores energy.

[0012] According to the foregoing technical solution, when the external force is released, the worm seat can drive the worm to move towards the worm gear under the elastic force of the worm seat elastic member, so that the two are automatically engaged.

[0013] In a preferred embodiment, when it is necessary to switch from the coarse-tuning mode to the fine-tuning mode, the pushing member is driven to drive the pressing member to move in a direction opposite to the first direction. The worm seat elastic member pushes the worm seat to move towards the worm gear. The first supporting member disengages from the first groove and abuts against a side of the worm seat away from the worm, and the worm gear and the worm are re-engaged.

[0014] According to the foregoing technical solution, when the pushing member is reset, the worm seat can drive the worm to reset towards the worm gear side under the rebound push of the elastic member, so that the worm and the worm gear are re-engaged, with a simple structure and convenient operation.

[0015] In a preferred embodiment, a limiting surface that extends obliquely away from the worm is connected to one end of the guiding surface close to the worm. When the pushing member moves along the first direction, the pressing member can move from the guiding surface to the limiting surface. When the pushing member moves in a direction opposite to the first direction, the pressing member can move from the limiting surface to the guiding surface.

[0016] According to the aforementioned technical solution, when the propulsion member is driven by manpower to move to a predetermined position along a first direction, the pressure member moves to a limiting surface, and then the limiting surface limits the retreat of the pressure member in a direction opposite to the first direction, thereby releasing manpower and freeing up hands to rotate the worm gear, thereby increasing the convenience of operation.

[0017] In a preferred embodiment, the switching unit is provided with a propulsion elastic member; when an external force pushes the propulsion member to move along the first direction, the propulsion elastic member deforms and accumulates force; when the external force is removed, the switching unit moves and resets in a direction opposite to the first direction under the action of the elastic force of the propulsion elastic member.

[0018] According to the aforementioned technical solution, the propulsion elastic member can conveniently push the switching unit to reset in a direction opposite to the first direction, with a simple structure and convenient operation.

[0019] In a preferred embodiment, when the worm wheel is meshed with the worm, there is a gap between the pressure member and the guide surface in the first direction; when the propulsion member moves along the first direction, the pressure member first abuts against the guide surface and then slides relatively thereto; when the propulsion member moves in a direction opposite to the first direction, the pressure member gradually disengages from the guide surface.

[0020] According to the above technical solution, the pressure member moves synchronously with the propulsion member along the first direction, abuts against the guide surface and presses down the guide surface, thereby pushing the worm seat and driving the worm away from the worm wheel, so that the two are separated.

[0021] In a preferred embodiment, a second groove is further provided on the side of the worm seat away from the worm; the propulsion member includes a second support member capable of supporting the worm seat; when the propulsion member moves along the first direction, the second support member enters the second groove; when the propulsion member moves in a direction opposite to the first direction, the second support member disengages from the second groove and abuts against the side of the worm seat away from the worm.

[0022] In a preferred embodiment, the switching unit includes a button, and pressing the button can push the propulsion member to move along the first direction.

[0023] In a preferred embodiment, the propulsion member is connected to a limiting block, and the worm seat is provided with a block extending obliquely in a direction away from the worm; when the button is pressed, the limiting block can be pushed by the button to move along the block in an oblique direction toward the worm, and synchronously push the propulsion member to move in the first direction; when the button is pressed to a predetermined position, the limiting block moves to the side of the block away from the button to limit the propulsion member from retreating in a direction opposite to the first direction.

[0024] According to the foregoing technical solution, when a human presses the button to a predetermined position, the limiting block moves to the side of the stopper away from the button to limit the retraction of the pushing member in the direction opposite to the first direction, so that the human effort can be released, thus enabling the hand to be freed up to rotate the worm gear, which increases the convenience of operation.

[0025] In a preferred manner, the limiting block has a limiting block body and a limiting block extension portion. When the button is pressed, the limiting block extension portion moves obliquely along the stopper towards the direction close to the worm, and pushes the pushing member to move in the first direction through the limiting block body.

[0026] In a preferred manner, it includes a rotating wheel, and the rotating wheel is respectively in transmission connection with the pushing member and the worm gear; in the fine adjustment mode, the worm gear is driven to rotate through the rotating wheel; when switching from the fine adjustment mode to the coarse adjustment mode, the pushing member is driven to move in the first direction through the rotating wheel; when switching from the coarse adjustment mode to the fine adjustment mode, the pushing member and the pressing member are driven to move in the direction opposite to the first direction through the rotating wheel.

[0027] According to the foregoing technical solution, the rotating wheel can not only drag the pushing member to separate the worm gear from the worm wheel, but also rotate the worm gear in the fine adjustment mode, which increases the convenience of operation.

[0028] In a preferred manner, the rotating wheel is connected to the worm gear through a universal joint spline shaft and drives the worm gear to rotate; when the pushing member is driven to move in the first direction through the rotating wheel, the universal joint spline shaft is stretched in the first direction; when the pushing member is driven to move in the direction opposite to the first direction through the rotating wheel, the universal joint spline shaft resets.

[0029] According to the foregoing technical solution, when the pushing member is dragged through the rotating wheel, the worm gear and the worm wheel move downward and separate, and the universal joint spline shaft enables the rotating wheel to remain in place without following the worm gear downward. Description of the Drawings

[0030] In order to illustrate the present application more clearly, the specification drawings of the present application will be described and explained below. Obviously, the drawings in the following description only illustrate certain aspects of some exemplary embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0031] Figure 1 It is a cross-sectional view of the initial state of the rotation adjustment device in the first embodiment.

[0032] Figure 2 It is a cross-sectional view of the pushing state of the rotation adjustment device in the first embodiment.

[0033] Figure 3 It is a cross-sectional view of the retracted state of the rotary adjustment device in the first embodiment.

[0034] Figure 4 It is a schematic diagram of the switching unit of the rotary adjustment device in the first embodiment.

[0035] Figure 5 It is an external view of the rotary adjustment device in the first embodiment.

[0036] Figure 6 It is a cross-sectional view of the initial state of the rotary adjustment device in the second embodiment.

[0037] Figure 7 It is a cross-sectional view of the limited state of the rotary adjustment device in the second embodiment.

[0038] Explanation of the drawing text:

[0039] 1 Worm

[0040] 10 Runner

[0041] 11 Worm seat

[0042] 111 First groove

[0043] 112 Second groove

[0044] 113 Guide surface

[0045] 1131 Limiting surface

[0046] 114 First elastic member

[0047] 115 Second elastic member

[0048] 1160 Detent

[0049] 1161 First positioning hole

[0050] 1162 Second positioning hole

[0051] 2 Switching unit

[0052] 21 Pusher

[0053] 211 First support

[0054] 212 Second support

[0055] 213 Pushing elastic member

[0056] 214 Fixed frame

[0057] 215 Fixed column

[0058] 22 Pressing member

[0059] 23 Button

[0060] 230 Button Elastic Member

[0061] 231 Button Oblique Groove

[0062] 232 Button Inclined Plane

[0063] 24 Limit Block

[0064] 240 Limit Block Elastic Member

[0065] 241 Limit Block Main Body

[0066] 242 Limit Block Extension

[0067] 2421 Limit Block Inclined Plane

[0068] 25 Stop Block

[0069] 3 Worm Gear

[0070] 4 Housing

[0071] 41 Mounting Fixed Plate

[0072] 411 Slide Groove

[0073] 5 Universal Joint Spline Shaft Detailed Embodiment

[0074] The following describes various exemplary embodiments of the present application in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and in no way limits the present application and its application or use. The present application can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present application thorough and complete and to fully convey the scope of the present application to those skilled in the art. It should be noted that: unless otherwise specified, the relative arrangements, numerical expressions, and numerical values of the components and steps described in these embodiments should be construed as merely exemplary and not as limitations.

[0075] The terms "including" or "comprising" or similar words used in the present application are intended to mean that the elements before this word cover the elements listed after this word, and do not exclude the possibility of also covering other elements.

[0076] All terms used in the present application (including technical terms or scientific terms) have the same meaning as understood by those of ordinary skill in the art to which the present application pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary should be construed as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless clearly defined as such herein.

[0077] For components not described in detail in this part, specific model parameters of components, the interrelationships between components, and control circuits, they can be considered as technologies, methods, and devices known to those of ordinary skill in the relevant art. However, in appropriate circumstances, the said technologies, methods, and devices should be regarded as part of the specification.

[0078] First, refer to Figures 1-5 to illustrate the composition of the rotation adjustment device according to the first embodiment of the present application.

[0079] Refer to Figures 1-4 , the rotation adjustment device of the present application includes a worm 1, a switching unit 2, and a worm wheel 3. The worm 1 is fixed to a worm seat 11.

[0080] For the convenience of description, in the present application, Figure 1 the direction from the worm wheel 3 to the worm seat 11 shown is defined as the up-down direction, with the worm wheel 3 on top and the worm seat 11 at the bottom. The extending direction of the worm 1 is defined as the horizontal direction. Among them, in the horizontal direction, the direction from the button 23 to the runner 10 shown in the figure is defined as the first direction, and the opposite direction is the second direction. At the same time, the first direction is defined as the right and the second direction is defined as the left. With Figure 1 the front side shown as the front, Figure 4 the back side shown as the back, and the front-back direction is perpendicular to both the up-down direction and the horizontal direction.

[0081] Among them, refer to Figure 5 , the switching unit 2 is arranged inside the housing 4. The housing 4 is provided with a mounting fixing plate 41. The mounting fixing plate 41 is provided with a chute 411. The worm seat 11 is slidably arranged in the chute 411, and the chute 411 limits the worm seat 11 in the left-right direction.

[0082] As an embodiment, the switching unit 2 includes a pushing member 21 and a pressing member 22. In this embodiment, the pushing member 21 includes a push rod extending in the horizontal direction, and a first support member 211 and a second support member 212 capable of supporting the worm seat 11. The pressing member 22 includes a convex structure extending in the front-back direction, which is fixedly connected to the pushing member 21 and is closer to the button 23 than the first support member 211 and the second support member 212. The first support member 211 and the second support member 212 can be support pins extending in the front-back direction. The above structure is only an example, and the specific styles of the pushing member 21, the pressing member 22, and these two support members are not limited.

[0083] On the side of the worm seat 11 away from the worm 1, i.e., the lower side, there are provided a first groove 111, a second groove 112 extending in the up and down direction, and a first elastic member 114 and a second elastic member 115 serving as elastic members of the worm seat. The first elastic member 114 and the second elastic member 115 have a specified deformation allowance in the up and down direction. The worm seat 11 further has a guiding surface 113 extending obliquely towards the side away from the worm 1, i.e., the lower side. As shown in the figure, the guiding surface 113 can be in different forms such as an inclined surface, a curved surface, an arc surface, etc., as long as it can provide a guiding function. For example, it can be any form of surface suitable for guiding that extends obliquely from top to bottom.

[0084] In the fine-tuning mode, the pushing member 21 is located on the lower side of the worm seat 11. The first supporting member 211 and the second supporting member 212 are in contact with the worm seat 11 to support the worm seat 11. If the support of the supporting members is missing, the component force of the transmission between the worm gear 3 and the worm 1 will cause the worm 1 to disengage and unable to maintain the meshing state. The pressing member 22 is arranged corresponding to the guiding surface 113. Specifically, in this embodiment, there is a certain interval between the pressing member 22 and the guiding surface 113 in the horizontal direction. Thus, when the pushing member 21 moves in the first direction, the first supporting member 211 and the second supporting member 212 respectively enter the first groove 111 and the second groove 112 first, and then the pressing member 22 contacts the guiding surface 113 and pushes the guiding surface 113 downward.

[0085] When it is necessary to switch from the fine-tuning mode to the coarse-tuning mode, the pushing member 21 is pushed to move in the first direction. The first supporting member 211 and the second supporting member 212 move to the right along the lower side of the worm seat 11 and respectively enter the first groove 111 and the second groove 112.

[0086] At this time, the pressing member 22 moves synchronously in the first direction, first contacts the guiding surface 113, and then slides relatively along the guiding surface 113, that is, the pressing member 22 moves obliquely upward relative to the guiding surface 113. The guiding surface 113 is gradually pressed downward as the pressing member 22 moves to the right. The pressing member 22 pushes the worm seat 11 to move downward, i.e., away from the worm gear 3, through the guiding surface 113, thereby driving the worm 1 to separate from the worm gear 3. At this time, the first elastic member 114 and the second elastic member 115 are compressed; then, the worm gear 3 can be directly rotated to quickly adjust its angle.

[0087] When it is necessary to switch from the coarse-tuning mode to the fine-tuning mode, the pushing member 21 is pushed to move in the second direction. The pressing member 22 also moves synchronously with the pushing member 21 in the second direction, and gradually removes the pressure applied to the guiding surface 113 until the pressing member 22 disengages from the guiding surface 113, that is, the pressing member 22 moves obliquely downward relative to the guiding surface 113. The worm seat 11 then moves upward, i.e., towards the worm gear 3, under the elastic force of the first elastic member 114 and the second elastic member 115.

[0088] Afterwards, as the worm seat 11 moves upward, the first support member 211 and the second support member 212 disengage from the first groove 111 and the second groove 112 respectively, and as the propeller 21 moves leftward, they respectively abut against the lower side of the worm seat 11 to support the worm seat 11, and the worm wheel 3 re-engages with the worm 1.

[0089] In the fine-tuning mode, the worm 1 is rotated to drive the worm wheel 3 to perform small angle fine-tuning. After the angle is adjusted, the self-locking performance of the worm wheel 3 and the worm 1 during the transmission connection can also achieve a tightening effect on the worm wheel 3 and the ultrasonic probe, making it less likely for the ultrasonic probe to be affected by external forces and cause angle changes during the detection process.

[0090] As a preferred mode, the switch unit 2 is provided with a propulsion elastic member 213, and the propulsion elastic member 213 has a prescribed deformation allowance in the horizontal direction. When an external force pushes the propulsion member 21 to move in the first direction, the propulsion elastic member 213 is synchronously deformed to store force. In this embodiment, the propulsion elastic member 213 is arranged at the end of the propulsion member 21 away from the button 23, i.e., the right end, and is compressed as the propulsion member 21 moves to the right. In fact, it can also be adjusted to the left end position of the propulsion member 21 so that it is stretched as the propulsion member 21 moves to the right; when the external force is removed, the propulsion elastic member 213 rebounds and resets, pushing the switch unit 2 to move and reset in the second direction.

[0091] As a preferred embodiment, the switching unit 2 includes a button 23, which can be manually pressed to push the propeller 21 to move along the first direction. When the worm 1 is disengaged from the worm wheel 3, the external force applied by the button 23 is maintained, and the worm wheel 3 can be quickly rotated at a large angle by hand. When the predetermined angle is reached, the button 23 is released, and the propeller 21 and the worm seat 11 are restored to their initial states by the elastic force of their respective elastic members. After the worm seat 11 moves up, the worm 1 is meshed with the worm wheel 3.

[0092] Further preferably, after the worm 1 is disengaged from the worm wheel 3 , in order to release the human hand from the state of pressing the button 23 , the present application designs a mechanism for limiting the retreat of the propulsion member 21 along the second direction.

[0093] As an example, see Figures 1-4 The propulsion member 21 is provided with a fixed frame 214 and a fixed column 215 extending in the up and down directions. A limit block 24 and a limit block elastic member 240 are sleeved on the fixed column 215. The limit block 24 can move up and down along the fixed column 215 and drive the limit block elastic member 240 to compress / rebound.

[0094] Preferably, the limiting block 24 includes a limiting block main body 241 sleeved on the fixed column 215 and a limiting block extension part 242 extending backward from the limiting block main body 241. At the same time, a stop block 25 corresponding to the limiting block extension part 242 and extending obliquely away from the worm 1 is provided on the worm seat 11. Exemplarily, the left side surface of the stop block 25 is Figure 2 in the style of extending obliquely from the upper right to the lower left as shown.

[0095] Refer to Figure 1 and Figure 4 , the limiting block 24 has a limiting block inclined surface 2421 facing left, and the limiting block inclined surface 2421 is configured to extend obliquely from the upper right to the lower left. The right end of the button 23 has a button inclined groove 231 adapted to the limiting block 24. When the button 23 is pressed, the right end of the button 23 abuts against the limiting block inclined surface 2421 and makes the limiting block 24 gradually slide into the button inclined groove 231. At this time, the limiting block 24 moves downward along the fixed column 215. Then, when the button 23 is continuously pressed, the limiting block 24 can be pushed to move rightward, so that the limiting block extension part 242 abuts against the left side surface of the stop block 25 and moves obliquely upward to the right along the left side surface of the stop block 25. At this time, under the action of the stop block 25, the limiting block 24 slides out of the button inclined groove 231 again, as Figure 2 shown.

[0096] When the button 23 is continuously pressed, the limiting block 24 finally moves above the stop block 25 and moves to the right side of the stop block 25. At this time, after the button 23 is released, the button 23 rebounds to the left under the elastic force of the button elastic member 230. The limiting block 24 cannot move back to the left due to the restriction of the stop block 25, so that the worm 1 and the worm gear 3 are kept separated, thus freeing the human hand to rotate the worm gear 3 and increasing the operation convenience.

[0097] Refer to Figure 3 and Figure 4 , a button inclined surface 232 is further provided at the right end of the button 23 and below the button inclined groove 231. When the limiting block 24 needs to be moved back to the left for reset, the button 23 is pressed again. The button inclined surface 232 can abut against the limiting block inclined surface 2421 and push the limiting block 24 to move rightward and gradually move downward at the same time through the limiting block inclined surface 2421 until the limiting block 24 is separated from the stop block 25. At this time, the limiting block 24 is located at the lower right of the stop block 25. Due to the release of the restriction of the stop block 25, under the elastic force of the pushing elastic member 213, the pusher 21, the pressing member 22 and the limiting block 24 can move back to the left for reset, and the worm 1 and the worm gear 3 are re-engaged.

[0098] Through the above-mentioned embodiments, the present application designs a set of clutch mechanisms for the worm wheel 3 and the worm 1, thereby realizing the transmission separation or engagement of the worm wheel 3 and the worm 1. The ultrasonic probe is fixed to the worm wheel 3, and the worm wheel 3 and the worm 1 are separated when the angle of the worm wheel 3 needs to be quickly rotated. The worm wheel 3 is directly rotated with the help of other external forces to achieve large angle coarse adjustment. After the coarse adjustment is completed, the worm wheel 3 and the worm 1 can be meshed, and then the worm 1 is used to drive the worm wheel 3 to rotate for small angle fine adjustment, thereby taking into account both the accuracy and efficiency of angle adjustment.

[0099] Next, combine Figure 6 , Figure 7 The second embodiment of the present application is described in detail. The main structure of the second embodiment is the same as that of the first embodiment, and only the differences are described here.

[0100] See also Figure 6 , Figure 7 In this embodiment, a rotating wheel 10 is provided which is respectively connected to the propulsion member 21 and the worm 1; in the fine adjustment mode, the rotating wheel 10 can drive the worm 1 to rotate, and the worm wheel 3 can be driven to rotate via the worm 1. When switching from the fine adjustment mode to the coarse adjustment mode, the rotating wheel 10 is dragged to drive the propulsion member 21 to move rightward; when switching from the coarse adjustment mode to the fine adjustment mode, the rotating wheel 10 drives the propulsion member 21 and the pressure member 22 to move leftward.

[0101] Preferably, the rotating wheel 10 is connected to the worm 1 via the universal joint spline shaft 5. When the rotating wheel 10 is dragged to drive the propeller 21 to move rightward, the universal joint spline shaft 5 is stretched along the first direction, and at the same time, as the worm 1 moves downward, the left end of the universal joint spline shaft 5 connected to the worm 1 also moves downward, but the right end of the universal joint spline shaft 5 and the rotating wheel 10 are stationary in the vertical direction; when the rotating wheel 10 drives the propeller 21 to move leftward, the universal joint spline shaft 5 is reset.

[0102] It is understandable that the universal joint spline shaft 5 may be omitted. When the rotating wheel 10 is dragged, the rotating wheel 10 can be moved downward synchronously with the worm 1. However, in this case, a connecting shaft that can be extended and retracted in the horizontal direction needs to be provided between the rotating wheel 10 and the worm 1, so that the rotating wheel 10 can move left and right while the worm 1 remains stationary in the horizontal direction, and can drive the worm 1 to rotate synchronously when the rotating wheel 10 is rotated.

[0103] Continue to view Figure 6 , Figure 7 As a preferred method, the upper end of the guide surface 113 is connected with a limit surface 1131 extending obliquely from the upper left to the lower right. The limit surface 1131 can be in different styles such as an inclined surface, a curved surface, and an arc surface, as long as it can provide a limit function. For example, in this embodiment, a slot as shown in the figure is provided at the limit surface 1131 to accommodate the pressure member 22.

[0104] When the pusher 21 moves rightward, the pressing member 22 can move from the guiding surface 113 to the limiting surface 1131, that is, reach the aforementioned card slot; at this time, restricted by the limiting surface 1131, the pressing member 22 cannot move leftward and retreat, so that the worm 1 and the worm gear 3 are kept separated, enabling the human hand to be freed.

[0105] When the pusher 21 moves leftward, the pressing member 22 can move from the limiting surface 1131 to the guiding surface 113. At this time, it is released from the restriction of the limiting surface 1131. Under the elastic force of the pushing elastic member 213, the pusher 21 and the pressing member 22 retreat leftward and reset, and the worm 1 and the worm gear 3 are re-engaged.

[0106] Preferably, the pusher 21 is provided with a detent 1160 as shown in the figure, and the detent 1160 can move in the up and down directions. When the worm 1 and the worm gear 3 are engaged and the switching unit 2 is in the Figure 6 initial state shown, the detent 1160 is located in the first positioning hole 1161 on the left side. When the pusher 21 starts to move rightward, the detent 1160 disengages from the first positioning hole 1161 and moves rightward. When the pusher 21 moves rightward to a predetermined position, the pressing member 22 reaches the card slot at the limiting surface 1131, and the detent 1160 synchronously reaches the second positioning hole 1162 on the right side, achieving a better positioning effect.

[0107] It should be noted that the limiting surface 1131 is not limited to Embodiment 2. In other embodiments, the limiting surface 1131 and its corresponding card slot can also be provided. When the pusher 21 moves rightward to a predetermined position, the pressing member 22 reaches the limiting surface 1131, that is, on the right side of the guiding surface 113. The leftward retreat of the pusher 21 is restricted via the pressing member 22, so that the human hand can be freed, increasing the operation convenience.

[0108] It can be understood that a first groove 111 and a second groove 112 are provided on the lower side of the worm seat 11 of the present application, and are correspondingly matched with a first support member 211 and a second support member 212. In fact, only one groove and one corresponding support member can also be provided, or more than 3 grooves and a plurality of corresponding support members. The specific number is not limited. Similarly, the number of the first elastic member 114 and the second elastic member 115 below the worm seat 11 is not limited to 2, and can be 1 or more, as long as the worm seat 11 can be reset upward by rebounding.

[0109] In summary, the rotation positioning device of the present application sets a transmission clutch structure of the worm gear 3 and the worm 1, separates the two in the coarse adjustment mode and directly rotates the worm gear 3, and meshes the two in the fine adjustment mode to drive the worm gear 3 to rotate via the worm 1, so as to greatly improve the adjustment efficiency while ensuring the angle adjustment accuracy, realize fast and accurate rotation positioning, and can be locked after rotating to a predetermined angle, making it not easily affected by external forces and causing angle changes.

[0110] It should be understood that the specific embodiments described above are only used to explain the present application, and the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application, making changes, substitutions, and combinations according to the technical solutions and concepts of the present application, shall be covered by the protection scope of the present application.

Claims

1. A rotation adjustment device, comprising a worm wheel, a worm and a worm seat for fixing the worm; characterized in that: Contains coarse adjustment mode and fine adjustment mode; In the coarse adjustment mode, the worm wheel and the worm are in a non-meshing state, and the worm wheel is directly rotated to adjust its angle; In the fine-tuning mode, the worm wheel and the worm are in meshing state, and the worm is rotated to drive the worm wheel to adjust its angle.

2. The rotation adjustment device according to claim 1, characterized in that: It also includes a switching unit drivingly connected to the worm seat; When switching from the fine adjustment mode to the coarse adjustment mode, the switching unit drives the worm seat to move in a direction away from the worm wheel, thereby separating the worm from the worm wheel; When switching from the coarse adjustment mode to the fine adjustment mode, the switching unit drives the worm seat to move toward the worm wheel, thereby causing the worm to mesh with the worm wheel.

3. The rotation adjustment device according to claim 2, characterized in that: The switching unit comprises a pressurizing member and a propulsion member, and the propulsion member comprises a first support member capable of supporting the worm seat; A first groove is provided on a side of the worm seat away from the worm; the worm seat also has a guide surface extending obliquely toward a side away from the worm; In the fine-tuning mode, the propulsion member is located on a side of the worm seat away from the worm, the first support member abuts against the worm seat, and the pressure member is arranged corresponding to the guide surface; When switching from the fine adjustment mode to the coarse adjustment mode, the propulsion member is driven to move along the extension direction of the worm, i.e., the first direction, the first support member enters the first groove, the pressure member slides relatively along the guide surface, and pushes the worm seat to move in a direction away from the worm wheel via the guide surface, thereby separating the worm from the worm wheel.

4. The rotation adjustment device according to claim 3, characterized in that: The worm seat is also connected to a worm seat elastic member; As the worm seat moves in a direction away from the worm wheel, the elastic member of the worm seat deforms to store force.

5. The rotation adjustment device according to claim 4, characterized in that: When it is necessary to switch from the coarse adjustment mode to the fine adjustment mode, the propulsion member is driven to drive the pressure member to move in a direction opposite to the first direction, the worm seat elastic member pushes the worm seat to move in a direction close to the worm wheel, the first support member disengages from the first groove and abuts against the side of the worm seat away from the worm, and the worm wheel re-engages with the worm.

6. The rotation adjustment device according to claim 3, characterized in that: An end of the guide surface close to the worm is connected to a limiting surface extending obliquely toward a side away from the worm; When the propulsion member moves along the first direction, the pressure member can move from the guide surface to the limiting surface; When the pushing member moves in a direction opposite to the first direction, the pressing member can move from the limiting surface to the guiding surface.

7. The rotation adjustment device according to any one of claims 3 to 6, characterized in that: The switching unit is provided with a propulsion elastic member; When an external force pushes the propulsion member to move along the first direction, the propulsion elastic member deforms and stores force; When the external force is removed, the switching unit moves and resets in a direction opposite to the first direction under the elastic force of the propulsion elastic member.

8. The rotation adjustment device according to any one of claims 3 to 6, characterized in that: When the worm wheel is meshed with the worm, there is a gap between the pressure member and the guide surface in the first direction; When the pushing member moves along the first direction, the pressing member first abuts against the guide surface and then slides relatively thereto; When the pushing member moves in a direction opposite to the first direction, the pressing member gradually separates from the guiding surface.

9. The rotation adjustment device according to any one of claims 3 to 6, characterized in that: A second groove is further provided on a side of the worm seat away from the worm; The propulsion member includes a second support member capable of supporting the worm seat; When the pushing member moves along the first direction, the second supporting member enters the second groove; When the propulsion member moves in a direction opposite to the first direction, the second support member disengages from the second groove and abuts against a side of the worm seat away from the worm.

10. The rotation adjustment device according to any one of claims 3 to 6, characterized in that: The switching unit includes a button, and pressing the button can push the propulsion member to move along the first direction.

11. The rotation adjustment device according to claim 10, characterized in that: The propulsion member is connected to a limit block, and the worm seat is provided with a stopper extending obliquely in a direction away from the worm; When the button is pressed, the limit block can be pushed by the button to move along the stopper in a tilted direction toward the worm, and simultaneously push the propulsion member to move along the first direction; When the button is pressed to a predetermined position, the limit block moves to a side of the stop block away from the button to limit the pusher from retreating in a direction opposite to the first direction.

12. The rotation adjustment device according to claim 11, characterized in that: The limit block has a limit block body and a limit block extension portion. When the button is pressed, the limit block extension portion moves along the stop block toward the worm and pushes the propulsion member to move along the first direction via the limit block body.

13. The rotation adjustment device according to any one of claims 3 to 6, characterized in that: It comprises a rotating wheel, which is respectively connected to the propulsion member and the worm; in the fine-tuning mode, the worm is driven to rotate by the rotating wheel; When switching from the fine adjustment mode to the coarse adjustment mode, the propulsion member is driven to move along the first direction via the rotating wheel; When switching from the coarse adjustment mode to the fine adjustment mode, the propulsion member and the pressure member are driven by the rotating wheel to move in a direction opposite to the first direction.

14. The rotation adjustment device according to claim 13, characterized in that: The rotating wheel is connected to the worm via a universal joint spline shaft and drives the worm to rotate; When the driving wheel drives the pushing member to move along the first direction, the universal joint spline shaft is stretched along the first direction; When the driving wheel drives the pushing member to move in the direction opposite to the first direction, the universal joint spline shaft resets.

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