Angle adjusting device and channel gate

Abstract

The utility model relates to the technical field of channel gates, and discloses an angle adjusting device and a channel gate, the angle adjusting device comprises a base and an adjusting assembly, the base is provided with a first limiting part, the adjusting assembly comprises a rotating support, an adjusting support and an elastic piece, the rotating support is rotatably connected with the base, and the adjusting support is slidably installed on the rotating support; the adjusting bracket is provided with a second limiting part; the elastic piece is arranged between the rotating bracket and the adjusting bracket; in the natural state, the first limiting part and the second limiting part are locked under the action of the elastic piece so as to limit relative rotation of the adjusting assembly and the base, the adjusting support is pulled, and the second limiting part can be separated from the first limiting part so that the adjusting assembly can rotate relative to the base. When the angle needs to be adjusted, the adjusting support is pulled, the second limiting part is separated from the first limiting part, and then the adjusting assembly can rotate relative to the base, so that angle adjustment is achieved, and the angle adjustment process is convenient, rapid, time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of channel gates, in particular to an angle adjustment device and a channel gate. Background Art

[0002] A gate, also known as a turnstile or pedestrian gate, is an automated access control device used to control the flow of people in and out. Gates are typically installed at the entrances and exits of passageways to monitor and control access, maintaining security and management. Specifically, some gates are equipped with facial recognition technology, which uses facial recognition to authenticate identity, ensuring only authorized personnel can pass.

[0003] However, current facial recognition devices are usually installed on the channel gate by screws. After tightening the screws, the height and angle that the facial recognition device can recognize are fixed, which is not convenient for recognizing people of different heights. Utility Model Content

[0004] The embodiments of the present utility model aim to provide an angle adjustment device and a channel gate to solve the technical problem of inconvenient angle adjustment of face recognition equipment in the prior art.

[0005] The embodiment of the present invention solves the technical problem by adopting the following technical solution: providing an angle adjustment device, comprising:

[0006] A base having a first limiting portion;

[0007] an adjustment assembly, the adjustment assembly comprising an adjustment bracket, a rotating bracket, and an elastic member, the rotating bracket being rotatably connected to the base, the adjustment bracket being slidably mounted on the rotating bracket, the adjustment bracket having a second limiting portion, and the elastic member being disposed between the rotating bracket and the adjustment bracket;

[0008] In a natural state, the first and second limiting portions are locked together under the action of the elastic member to limit the relative rotation of the adjustment assembly and the base. When the adjustment bracket is pulled, the adjustment bracket slides relative to the rotating bracket, separating the second limiting portion from the first limiting portion, allowing the adjustment assembly to rotate relative to the base. In some embodiments, both the first and second limiting portions are tooth-shaped structures.

[0009] In some embodiments, a sliding groove is provided on the rotating member, and a sliding member is provided on the adjusting bracket. The sliding member can slide along the sliding groove to separate the first limiting portion from the second limiting portion.

[0010] In some embodiments, the sliding member abuts against two opposite side walls of the sliding groove in the width direction.

[0011] In some embodiments, the base includes a bottom plate, and a first side plate and a second side plate provided on opposite sides of the bottom plate, and the top ends of the first side plate and the second side plate are respectively provided with the first limiting portion;

[0012] The adjustment bracket includes a first connecting body, and a third side plate and a fourth side plate arranged on opposite sides of the first connecting body, the third side plate and the fourth side plate respectively correspond to the positions of the first side plate and the second side plate, and the bottom ends of the third side plate and the third side plate are respectively provided with the second limiting portion.

[0013] In some embodiments, the rotating bracket includes a second connecting body, and a fifth side plate and a sixth side plate arranged on opposite sides of the second connecting body, the elastic member is arranged between the first connecting body and the second connecting body, the fifth side plate is rotatably connected to the first side plate, and the sixth side plate is rotatably connected to the second side plate.

[0014] In some embodiments, a guide rod is further included, wherein the guide rod is arranged between the adjustment bracket and the rotating bracket, and the elastic member is sleeved on the guide rod.

[0015] In some embodiments, a handle is further included, and the handle is fixedly connected to the adjustment bracket.

[0016] In some embodiments, a face recognition device is further included, and the face recognition device is arranged on the rotating bracket or the adjusting bracket.

[0017] The embodiment of the present utility model solves the technical problem by adopting the following technical solution: providing a channel gate, including the angle adjustment device as described in any of the above embodiments; and

[0018] The angle adjustment device is installed on the machine body.

[0019] Compared with the prior art, in the angle adjustment device and channel gate provided by the embodiments of the present invention, when angle adjustment is not required, the first limit portion on the base and the second limit portion on the adjustment bracket are locked together, which limits the rotation of the adjustment component relative to the base, thereby avoiding accidental rotation caused by accidental touch. When angle adjustment is required, it is only necessary to pull the adjustment bracket, and the adjustment bracket overcomes the elastic force of the elastic member and separates the first limit portion from the second limit portion. Then the adjustment component can be rotated to the appropriate angle, and finally the adjustment bracket is released. Under the action of the reset force of the elastic member, the second limit portion of the adjustment bracket is re-locked with the first limit portion, and the relative rotation of the adjustment component and the base is again limited, thereby completing the angle adjustment. The angle adjustment is convenient and fast, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of an angle adjustment device provided by an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the three-dimensional structure of the angle adjustment device in the embodiment of the utility model equipped with a face recognition device;

[0023] Figure 3 This is a schematic diagram of the exploded structure of the angle adjustment device in the embodiment of the present utility model;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the base in the embodiment of the present utility model;

[0025] Figure 5 This is a schematic diagram of the three-dimensional structure of the adjustment bracket in the embodiment of the utility model;

[0026] Figure 6 This is a schematic diagram of the three-dimensional structure of the rotating bracket in the embodiment of the present utility model;

[0027] Figure 7 This is a schematic diagram of the three-dimensional structure of the handle in the embodiment of the present utility model;

[0028] Figure 8 This is a schematic diagram of the three-dimensional structure of the angle adjustment device in another embodiment of the present invention;

[0029] Figure 9 yes Figure 8 The exploded structural diagram of the angle adjustment device shown;

[0030] Figure 10 This is a schematic diagram of the three-dimensional structure of the sleeve in the embodiment of the utility model;

[0031] Figure 11 It is a schematic diagram of the three-dimensional structure of the channel gate in the embodiment of the utility model.

[0032] The reference numerals are as shown in the following table:

[0033] Angle adjustment device 100 base 10 shaft 101 The first limiting part 11 baseplate 12 First side panel 13 Second side panel 14 Adjustment components 20 The second limiting part 210 Sliders 211 First connecting body 212 Second mounting hole 2121 Limiting hole 2122 Third side panel 213 Fourth side panel 214 Rotating bracket 22 chute 220 sidewall 2200 Second connecting body 221 First mounting hole 2211 through-hole 2212 Fifth side panel 222 Sixth side panel 223 elastic parts 23 Guide 30 handle 40 Grip 41 Rod 42 connection hole 420 facial recognition equipment 50 sleeve 60 Cylinder 61 exposure 610 Cover 62 Avoidance 620 Channel Gate 200 Body 201 DETAILED DESCRIPTION

[0034] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "connected" to another element, it can be directly on the other element, or there can be one or more centered elements therebetween. The terms "upper", "lower", "left", "right", "upper end", "lower end", "top" and "bottom" used in this specification indicate an orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0035] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art in the field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0036] The following will be combined with the Figures 1 to 11 The angle adjustment device and the channel gate provided in the embodiments of the present utility model are described in detail.

[0037] See also Figures 1 to 3 The present invention provides an angle adjustment device 100, comprising a base 10 and an adjustment assembly 20. The base 10 has a first limiting portion 11. The adjustment assembly 20 includes an adjustment bracket 21, a rotating bracket 22, and an elastic member 23. The rotating bracket 22 is rotatably connected to the base 10. The adjustment bracket 21 is slidably mounted on the rotating bracket 22. The adjustment bracket 21 has a second limiting portion 210. The elastic member 23 is disposed between the rotating bracket 22 and the adjustment bracket 21. In a natural state, the first limiting portion 11 and the second limiting portion 210 are locked together under the action of the elastic member 23 to limit the relative rotation of the adjustment assembly 20 and the base 10. When the adjustment bracket 21 is pulled, the adjustment bracket 21 slides relative to the rotating bracket 22, so that the second limiting portion 210 separates from the first limiting portion 11, and the adjustment assembly 20 can rotate relative to the base 10.

[0038] In this embodiment, the angle adjustment device 100 can be used to adjust the angle of the device to be adjusted, wherein the device to be adjusted can be a face recognition device 50 but is not limited thereto, such as Figure 2 As shown, taking the device to be adjusted as a face recognition device 50 as an example, the face recognition device 50 can be installed on the adjustment component 20. By rotating the adjustment component 20 relative to the base 10, the angle of the face recognition device 50 can be adjusted to meet the recognition needs of people of different heights.

[0039] The base 10 is usually configured as a fixed setting, and the adjustment assembly 20 includes a rotating bracket 22, an adjustment bracket 21 and an elastic member 23. The rotating bracket 22 is rotatably connected to the base 10. The base 10 and the adjustment bracket 21 are respectively provided with a first limiting portion 11 and a second limiting portion 210. Optionally, the adjustment bracket 21 is roughly located above the base 10, the first limiting portion 11 is located at the top of the base 10, the second limiting portion 210 is located at the bottom of the adjustment bracket 21, and the second limiting portion 210 is located above the first limiting portion 11. The adjusting bracket 21 can slide relative to the rotating bracket 22. Through the relative sliding of the adjusting bracket 21 and the rotating bracket 22, the first limiting portion 11 and the second limiting portion 210 can be separated or locked. It can be understood that the adjusting bracket 21 can only slide in a predetermined direction relative to the rotating bracket 22 (away from the first limiting portion 11 or toward the first limiting portion 11), and for the rotation of the adjusting bracket 21 and the rotating bracket 22, the two restrain each other, that is, the adjusting bracket 21 and the rotating bracket 22 cannot rotate individually, but can only rotate together as a whole.

[0040] The natural state is the state of the adjustment component 20 when it is not subjected to external force. In the natural state, since the first limit portion 11 and the second limit portion 210 are locked together under the action of the elastic member 23, the adjustment bracket 21 cannot rotate and restrains the rotation of the rotating bracket 22 relative to the base 10, that is, the entire adjustment component 20 cannot rotate, avoiding accidental rotation caused by accidental touching of the adjustment component 20.

[0041] When adjustment is required (for example, when the angle of the face recognition device 50 needs to be adjusted), first pull up the adjustment bracket 21. The adjustment bracket 21 overcomes the elastic force of the elastic member 23 and slides relative to the rotating bracket 22, so that the first limit portion 11 is separated from the second limit portion 210. Then the adjustment component 20 can be rotated so that the adjustment component 20 drives the face recognition device 50 to rotate to an appropriate angle. Finally, release the adjustment bracket 21. Under the action of the reset force of the elastic member 23, the second limit portion 210 on the adjustment bracket 21 is re-locked with the first limit portion 11 on the base 10, and the relative rotation of the adjustment component 20 and the base 10 is restricted again, thereby completing the adjustment of the angle of the face recognition device 50. The angle adjustment process is convenient and fast, saving time and effort.

[0042] like Figure 3As shown, in some embodiments, both the first stopper 11 and the second stopper 210 are tooth-shaped structures. Each tooth-shaped structure includes a plurality of teeth spaced apart. In a natural state, the two tooth-shaped structures mesh with each other to provide a secure locking effect. When the angle needs to be adjusted, the adjustment bracket 21 is simply lifted upward to separate the two tooth-shaped structures.

[0043] Optionally, the toothed structure is a fine-tooth structure, that is, the toothed structure has a relatively large number of teeth and a small tooth spacing, which can achieve smaller angle adjustment and provide higher angle adjustment accuracy.

[0044] In other embodiments, the first limiting portion 11 and the second limiting portion 210 may also have other structures. For example, the first limiting portion 11 and the second limiting portion 210 may be mutually cooperating snap-fit ​​structures. Specifically, the first limiting portion 11 may be a plurality of grooves provided on the base 10, and the second limiting portion 210 may be a plurality of protrusions matching the grooves. The grooves and protrusions are engaged with each other to limit the rotation of the adjustment assembly 20. When the adjustment bracket 21 is slid, the protrusions can be disengaged from the grooves, allowing the adjustment assembly 20 to rotate relative to the base 10. In addition, the first limiting portion 11 and the second limiting portion 210 may also be mutually cooperating magnetic structures, etc.

[0045] like Figure 3 As shown, in some embodiments, a slide groove 220 is provided on the rotating bracket 22, and a sliding member 211 that cooperates with the slide groove 220 is provided on the adjusting bracket 21. The sliding member 211 can slide along the slide groove 220 to separate the second limiting portion 210 from the first limiting portion 11.

[0046] Optionally, the slide groove 220 may be a strip-shaped groove, and the sliding member 211 may be a latch or a slider, etc. Through the limited cooperation between the sliding member 211 and the slide groove 220, the adjustment bracket 21 can slide along the length direction of the slide groove 220, thereby separating the adjustment bracket 21 from the base 10, and further separating the second limiting portion 210 from the first limiting portion 11.

[0047] It is understandable that in other embodiments, a sliding groove may be provided on the adjusting bracket 21 and a sliding member may be provided on the rotating bracket 22 to achieve sliding fit between the two.

[0048] like Figure 3As shown, in some embodiments, the sliding member 211 respectively abuts against the opposite side walls 2200 in the width direction of the slide groove 220, ensuring that the sliding member 211 can only slide along the length direction of the slide groove 220, avoiding the relative rotation of the adjustment bracket 21 relative to the rotating bracket 22, ensuring that after the adjustment bracket 21 is lifted, the rotation centers of the adjustment bracket 21 and the rotating bracket 22 remain consistent, and ensuring that after the adjustment bracket 21 is released, the adjustment bracket 21 can accurately engage with the first limiting portion 11 and the second limiting portion 210 under the action of the reset force of the elastic member 23.

[0049] See also Figures 4 to 6 In some embodiments, the base 10 includes a bottom plate 12, and a first side plate 13 and a second side plate 14 arranged on both sides of the bottom plate 12, and the top ends of the first side plate 13 and the second side plate 14 are respectively provided with a first limiting portion 11, and the adjustment bracket 21 includes a first connecting body 212, and a third side plate 213 and a fourth side plate 214 arranged on both sides of the first connecting body 212, the third side plate 213 and the fourth side plate 214 respectively correspond to the positions of the first side plate 13 and the second side plate 14, and the bottom ends of the third side plate 213 and the third side plate 213 are respectively provided with a second limiting portion 210.

[0050] like Figure 4 and Figure 5 As shown, the base 10 includes a bottom plate 12, a first side plate 13, and a second side plate 14, which can be an integrally formed structure. The adjustment bracket 21 includes a first connecting body 212, a third side plate 213, and a fourth side plate 214, which can be an integrally formed structure.

[0051] The third side panel 213 is located above the first side panel 13, and the fourth side panel 214 is located above the second side panel 14. In a natural state, the second limiting portions 210 on the third side panel 213 and the fourth side panel 214 are respectively locked with the first limiting portions 11 on the first side panel 13 and the second side panel 14 to provide a more stable locking effect. In this embodiment, double-sided locking can evenly distribute the force, ensure the stability of the overall structure, and avoid uneven force, offset or loosening that may be easily caused by unilateral locking.

[0052] In some embodiments, the rotating bracket 22 includes a second connecting body 221, and a fifth side plate 222 and a sixth side plate 223 arranged on both sides of the second connecting body 221, the elastic member 23 is arranged between the first connecting body 212 and the second connecting body 221, the fifth side plate 222 is rotatably connected to the first side plate 13, and the sixth side plate 223 is rotatably connected to the second side plate 14.

[0053] See also Figure 3 、 Figure 5 and Figure 6 The elastic member 23 can be a spring or an elastic sheet, etc. The elastic member 23 is located between the first connecting body 212 and the second connecting body 221. Optionally, the first connecting body 212 and the second connecting body 221 are arranged opposite to each other, and the two ends of the elastic member 23 are respectively against the first connecting body 212 and the second connecting body 221. When the adjustment bracket 21 is lifted and released, the elastic member 23 provides a reset force to quickly push the adjustment bracket 21 back to its original position, so that the second limiting portion 210 is re-engaged with the first limiting portion 11.

[0054] The rotating bracket 22 includes a second connecting body 221, a fifth side plate 222, and a sixth side plate 223. The second connecting body 221, the fifth side plate 222, and the sixth side plate 223 can be integrally formed to enhance structural stability. The fifth side plate 222 and the first side plate 13, and the sixth side plate 223 and the second side plate 14 can each be rotatably connected via a rotating shaft 101.

[0055] The fifth side plate 222 and the sixth side plate 223 are respectively provided with a sliding groove 220, and the third side plate 213 and the fourth side plate 214 are respectively provided with a sliding member 211, which is set in the corresponding sliding groove 220. By sliding the sliding member 211 in the sliding groove, the adjustment bracket 21 can slide relative to the rotating bracket 22, thereby separating the second limiting portion 210 and the first limiting portion 11.

[0056] Optionally, the fifth side plate 222 can be arranged on the inner side of the first side plate 13 and the third side plate 213, and the sixth side plate 223 can be arranged on the inner side of the second side plate 14 and the fourth side plate 214, or, the fifth side plate 222 can be arranged on the outer side of the first side plate 13 and the third side plate 213, and the sixth side plate 223 can be arranged on the outer side of the second side plate 14 and the fourth side plate 214, the fifth side plate 222 respectively abuts against the first side plate 13 and the third side plate 213, and the sixth side plate 223 respectively abuts against the second side plate 14 and the fourth side plate 214, to ensure the position accuracy of the adjustment bracket 21 and the rotating bracket 22 during rotation, and to avoid positional displacement of the rotating bracket 22 or the adjustment bracket 21 along the axial direction of the rotating shaft 101.

[0057] In some embodiments, the angle adjustment device 100 further includes a guide rod 30 (see Figure 3 ), the guide rod 30 is arranged between the adjustment bracket 21 and the rotating bracket 22, and the elastic member 23 is sleeved on the guide rod 30.

[0058] The guide rod 30 is installed between the first connecting body 212 and the second connecting body 221. Optionally, the guide rod 30 can be a roughly columnar structure. The guide rod 30 can be a pin, a cylindrical pin, etc. The length direction of the guide rod 30 is parallel to the length direction of the slide groove 220 and provides support and guidance for the elastic member 23, ensuring that the elastic member 23 moves along a predetermined path during compression and extension, and provides a reset force in a predetermined direction for the adjustment bracket 21, so that the second limit member on the adjustment bracket 21 is accurately engaged with the first limit member on the base 10.

[0059] Optionally, the second connecting body 221 and the first connecting body 212 are respectively provided with a first mounting hole 2211 (see FIG. Figure 6 ) and the second mounting hole 2121 (see Figure 5 ) to install the guide rod 30 between the first connecting body 212 and the second connecting body 221.

[0060] See also Figure 3 and Figure 7 In some embodiments, the angle adjustment device 100 further includes a handle 40 , which is fixedly matched with the adjustment bracket 21 . The setting of the handle 40 facilitates user operation and improves adjustment convenience.

[0061] Specifically, when angle adjustment is required, the user only needs to lift the handle 40 upwards, so that the handle 40 drives the adjustment bracket 21 to lift upwards, and then the second limit portion 210 is separated from the first limit portion 11, and then push the handle 40, and the handle 40 can drive the entire adjustment assembly 20 to rotate to the appropriate angle.

[0062] Optionally, the handle 40 includes a gripping portion 41 and a rod portion 42 connected to each other. The gripping portion 41 may be a columnar structure or a ring structure, etc., so that the user can hold it. The second connecting body 221 is provided with a through hole 2212 (see FIG. Figure 6 ), the rod portion 42 can pass through the through hole 2212 and be fixed to the first connecting body 212 of the first connecting body 212 to achieve a fixed connection between the handle 40 and the adjustment bracket 21.

[0063] like Figure 5 and Figure 7 As shown, in some embodiments, a connecting hole 420 is further provided at the end of the rod 42. Optionally, a limiting hole 2122 is also provided on the first connecting body 212. After the end of the rod 42 passes through the limiting hole 2122, it can be fixedly matched with the connecting hole 420 by fasteners such as screws and bolts to achieve a fixed connection between the handle 40 and the movable body.

[0064] Optionally, the limiting hole 2122 can be a waist-shaped hole or a polygonal hole, etc. The end of the rod 42 is passed through the limiting hole 2122 and is limited by the limiting hole 2122. The limiting hole 2122 limits the rotation of the rod 42 to prevent the handle 40 from rotating during use.

[0065] like Figure 2 As shown, in some embodiments, the angle adjustment device 100 also includes a face recognition device 50, which is arranged on the rotating bracket 22 or the adjusting bracket 21. Optionally, the face recognition device 50 can be fixedly installed on the rotating bracket 22 or the adjusting bracket 21 by means of threaded connection, clamping, etc.

[0066] See also Figures 8 to 10 In some embodiments, the angle adjustment device 100 further includes a sleeve 60, and the base 10 and the adjustment assembly 20 are respectively arranged on the inner side of the sleeve 60. The sleeve 60 can protect the angle adjustment device 100 and improve the neatness of the overall structure.

[0067] The sleeve 60 comprises a body 61 and a cover 62, which is mounted on the top of the body 61. A clearance opening 620 is defined in the cover 62, and the grip 41 of the handle 40 is positioned outside the sleeve 60 for ease of operation. The stem 42 of the handle 40 passes through the clearance opening 620. During rotation of the handle 40, the clearance opening 620 clears the stem 42, allowing the handle 40 to rotate the adjustment assembly 20.

[0068] Optionally, an opening 610 is further provided on the side of the cylinder 61 , and the face recognition device 50 is arranged on the outside of the sleeve 60 through the opening 610 to facilitate the user to perform face recognition.

[0069] See also Figure 11 Based on the same utility model concept, an embodiment of the present utility model further provides a channel gate 200, comprising the angle adjustment device 100 and a body 201 according to any of the above embodiments, wherein the angle adjustment device 100 is mounted on the body 201. Optionally, the angle adjustment device 100 can be mounted on the body 201 by a fixed connection between the base 10 and the body 201. Specifically, the fixed connection between the base 10 and the body 201 can be achieved by screws, clamping, or the like. In addition, the angle adjustment device 100 can also be fixedly mounted on the body 201 by a fixed connection between the sleeve 60 and the body 201.

[0070] Since the channel gate 200 has the angle adjustment device 100 in any of the above embodiments, it also has the beneficial effects in any of the above embodiments. Please refer to the above for the specific beneficial effects, which will not be repeated here.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of ​​the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An angle adjustment device, characterized in that: include: A base having a first limiting portion; an adjustment assembly, the adjustment assembly comprising an adjustment bracket, a rotating bracket, and an elastic member, the rotating bracket being rotatably connected to the base, the adjustment bracket being slidably mounted on the rotating bracket, the adjustment bracket having a second limiting portion, and the elastic member being disposed between the rotating bracket and the adjustment bracket; In a natural state, the first limiting portion and the second limiting portion are locked together under the action of the elastic member to limit the relative rotation of the adjustment assembly and the base; Pull the adjustment bracket, and the adjustment bracket slides relative to the rotating bracket, so that the second limiting portion is separated from the first limiting portion, and the adjustment assembly can rotate relative to the base.

2. The angle adjustment device according to claim 1, characterized in that: The first limiting portion and the second limiting portion are both tooth-shaped structures.

3. The angle adjustment device according to claim 1, characterized in that: The rotating member is provided with a sliding groove, and the adjusting bracket is provided with a sliding member; By pulling the adjustment bracket, the sliding member can slide along the sliding groove to separate the first limiting portion from the second limiting portion.

4. The angle adjustment device according to claim 3, characterized in that: The sliding members respectively abut against two opposite side walls of the sliding groove in the width direction.

5. The angle adjustment device according to claim 1, characterized in that: The base includes a bottom plate, and a first side plate and a second side plate provided on opposite sides of the bottom plate, and the top ends of the first side plate and the second side plate are respectively provided with the first limiting portion; The adjustment bracket includes a first connecting body, and a third side plate and a fourth side plate arranged on opposite sides of the first connecting body, the third side plate and the fourth side plate respectively correspond to the positions of the first side plate and the second side plate, and the bottom ends of the third side plate and the third side plate are respectively provided with the second limiting portion.

6. The angle adjustment device according to claim 5, characterized in that: The rotating bracket includes a second connecting body, and a fifth side plate and a sixth side plate arranged on opposite sides of the second connecting body, the elastic member is arranged between the first connecting body and the second connecting body, the fifth side plate is rotatably connected to the first side plate, and the sixth side plate is rotatably connected to the second side plate.

7. The angle adjustment device according to claim 1, characterized in that: It also includes a guide rod, which is arranged between the adjustment bracket and the rotating bracket, and the elastic member is sleeved on the guide rod.

8. The angle adjustment device according to claim 1, characterized in that: It also includes a handle, which is fixedly connected to the adjustment bracket.

9. The angle adjustment device according to claim 1, characterized in that: It also includes a face recognition device, which is arranged on the rotating bracket or the adjusting bracket.

10. A channel gate, characterized in that: comprising the angle adjustment device according to any one of claims 1 to 9; and The angle adjustment device is installed on the machine body.

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