Self-locking flipper for a sighting device

Abstract

The self-locking turnover support of the sighting device comprises a base, a rotating seat, a first rotating shaft and a second rotating shaft, the base is provided with a first installation channel and a second installation channel which are communicated with each other, i.e. a second position. The first rotating shaft is fixedly connected with the rotating seat, and the first rotating shaft is arranged in the first installation channel, the second rotating shaft is arranged in the second installation channel, the first rotating shaft comprises a second recess, the second rotating shaft comprises a first recess, and the first recess and the second recess can be rotated to the second position. When the first recess is located at the second position, the first rotating shaft can be rotated; when the second recess is rotated to the second position, the second rotating shaft can be rotated, and when the second rotating shaft drives the first recess to move away from the second position, the outer circumferential part of the second rotating shaft is limited and matched with the second recess in the second rotating direction and the fourth rotating direction, and the first rotating shaft is fixed at a specified position. The locking structure of the present application has strong stability in a bumpy or vibrating use environment, and the locking structure is not easily passively released.

Description

Technical Field

[0001] The present invention relates to the field of sights, and in particular to a self-locking flip bracket of a sight. Background Art

[0002] When shooting with a firearm, as the distance to different shooting targets changes, it is necessary to selectively use a magnifying glass. In order to quickly switch the magnifying glass between the working position and the ready-to-use position, the existing method is generally to use a flip bracket to install the magnifying glass on the firearm.

[0003] An existing flip bracket includes a rotating seat, a rotating shaft, and a fixed seat. The fixed seat is used to connect to the flip bracket mounting seat of a firearm, and the rotating seat is used to mount a sight. The rotating seat is rotatably connected to the fixed seat via the rotating shaft, wherein the rotating seat and the rotating shaft are fixedly connected. When the rotating seat is flipped, the rotating shaft rotates within the mounting channel of the fixed seat. To ensure that the rotating seat can be stably maintained in the working position, a socket is provided on the circumference of the rotating shaft, and a limit member mounting position is provided on the base. A latch, a spring, and a button are provided in the limit member mounting position. The latch is inserted into the socket under the elastic action of the spring to limit the rotation of the rotating shaft, thereby fixing the rotating shaft in the working position. When the rotating seat needs to be removed from the working position, the latch is pulled by pressing the button, and the latch slides out of the socket, releasing the rotation restriction on the rotating seat.

[0004] However, the existing flip bracket fails to better cope with the use of the sight. Although the existing flip bracket can keep the rotating seat and the sight thereon in the working position, due to the particularity of the use of the gun and the particularity of the gun's use state, the flip bracket will be subjected to bumps and vibrations caused by shooting, which may cause the pin to overcome the spring force to produce linear displacement and disengage from the socket, thereby causing the sight to move out of the working position and become ineffective. Summary of the Invention

[0005] The purpose of the present invention is to provide a self-locking flip bracket for a sighting instrument with a stable structure and good anti-vibration effect.

[0006] In order to achieve the above-mentioned first purpose, the present invention provides a self-locking flip bracket of a sight, comprising a base, a rotating seat and a first rotating shaft, the base comprising a first mounting channel arranged along a first direction, the first rotating shaft comprising a first connecting portion and a second connecting portion, the first connecting portion being fixedly connected to the rotating seat, the second connecting portion being rotatably arranged in the first mounting channel, the base further comprising a second mounting channel arranged along a second direction, the second mounting channel being communicated with the first mounting channel; the self-locking flip bracket of the sight further comprises a second rotating shaft, the second rotating shaft comprising a first recess, the second rotating shaft being located in the second mounting channel, the first recess being rotatable in the first rotating direction The cam is rotated from the first position to the second position, and the second position is located at the connection point between the first mounting channel and the second mounting channel; the second connecting portion includes a second recess, and when the first recess is located in the second position, the second recess can be rotated along the second rotation direction to the second position; when the second recess is located in the second position, the first recess can be rotated along the third rotation direction to the first position; when the second recess is located in the second position and the first recess is located in the first position, the outer periphery of the second rotating shaft and the second recess are engaged in the upper limit position in the second rotation direction and the fourth rotation direction; the first rotation direction and the third rotation direction are opposite, and the second rotation direction and the fourth rotation direction are opposite.

[0007] It can be seen from the above scheme that the second recess on the first rotating shaft, the first recess on the second rotating shaft, and the outer peripheral portion of the second rotating shaft constitute the locking structure of the present invention, when the first recess is in the second position, the second recess is opposite to the inner periphery of the first installation channel, the inner recessed part of the first recess coincides with the first installation channel, and there is no overlapping part between the outer peripheral surface of the second rotating shaft and the first installation channel, and the first rotating shaft can rotate freely in the first installation channel; when the second recess is in the second position, the second recess is opposite to the inner periphery of the second installation channel, the concave space of the second recess coincides with the second installation channel, and the outer peripheral portion of the second rotating shaft has no overlapping part with the second installation channel, and the second rotating shaft can rotate freely; therefore, when the second recess is in the second position, the second rotating shaft can rotate, and when the first recess leaves the second position, the outer peripheral portion of the second rotating shaft is limitedly engaged with the second recess, and the first rotating shaft cannot rotate. At this time, if you want to rotate the first rotating shaft, you must rotate the first recess to the second position. Although the gun will vibrate when in use, it will not provide a rotational force to the second rotating shaft, so the second rotating shaft can be maintained in a relatively fixed position. After the outer periphery of the second rotating shaft forms a locking fit with the second recess, as long as the second rotating shaft remains stationary or the first recess has not rotated to the second position, the outer periphery of the second rotating shaft can keep the first rotating shaft in a fixed locking position. The second rotating shaft locks the position of the first rotating shaft with its own rigidity and will not be mislocked by the vibration or bumping of the gun as in the background art.

[0008] According to the above solution, further, the first concave portion includes a first arc surface, and / or the second concave portion includes a second arc surface.

[0009] It can be seen from this that by setting the surfaces of the first recess and the second recess to be arcuate surfaces, the first rotating shaft and the second rotating shaft will not interfere with each other during their respective rotations.

[0010] According to the above solution, further, the diameter of the first arc surface is equal to the outer diameter of the second connecting portion, and / or the diameter of the second arc surface is equal to the diameter of the second rotating shaft.

[0011] It can be seen that the diameter of the first arc surface is equal to the outer diameter of the second connecting part. When the first recess is in the second position, the outer periphery of the second connecting part fits more tightly with the first recess. The diameter of the second arc surface is equal to the diameter of the second rotating shaft. When the second recess is in the second position, the outer periphery of the second rotating shaft fits more tightly with the second recess.

[0012] According to the above solution, further, when the first recess is in the second position, the first arc surface and the inner wall surface of the first installation channel are located on the same circumference, and / or, when the second recess is in the second position, the second arc surface and the inner wall surface of the second installation channel are located on the same circumference.

[0013] It can be seen from this that the diameter of the first arc surface is equal to the outer diameter of the second connecting part, a clearance fit can be formed between the first recess and the second connecting part, the position of the second rotating shaft is locked more accurately, and the stability of the locking structure is better; the diameter of the second arc surface is equal to the outer diameter of the second rotating shaft, a clearance fit can be formed between the second recess and the outer periphery of the second rotating shaft, the position of the first rotating shaft is locked more accurately, and the stability of the locking structure is better.

[0014] Further according to the above scheme, the second connecting part also includes a third recess. When the first recess is in the second position, the third recess can be rotated to the second position along the fourth rotation direction; when the third recess is in the second position, the first recess can be rotated to the first position along the third rotation direction. When the third recess is in the second position and the first recess is in the first position, the outer periphery of the second rotating shaft cooperates with the second recess in the second rotation direction and the fourth rotation direction.

[0015] According to the above solution, further, when the second recess is located at the second position, the rotating seat is located at the working position; when the third recess is located at the second position, the rotating seat is located at the standby position.

[0016] It can be seen that the second recess and the third recess enable the rotating seat to remain stable in both the working position and the ready-to-use position.

[0017] According to the above solution, the third recess includes a third arc surface, the diameter of the third arc surface is equal to the outer diameter of the second rotating shaft; the center line of the third arc surface is perpendicular to the center line of the second arc surface.

[0018] It can be seen that the diameter of the third arc surface is equal to the outer diameter of the second rotating shaft and the center line of the third arc surface is perpendicular to the center line of the second arc surface. A clearance fit can be formed between the third recess and the outer periphery of the second rotating shaft, and after the rotating seat rotates 90 degrees, it just rotates from the working position to the standby position.

[0019] According to the above solution, the self-locking flip bracket of the sight also includes an elastic member, and both ends of the elastic member are respectively connected to the base and the second rotating shaft; when the second recess is rotated from the second position to the first position, the elastic member stores energy.

[0020] It can be seen that when the second recess or the third recess is in the second position and the first recess is in the second position, the torsion spring can release the stored energy to drive the second rotating shaft to rotate, so that the second recess automatically returns to the first position to lock the first rotating shaft in a fixed position.

[0021] According to the above scheme, the self-locking flip bracket of the sight includes a wrench; the wrench is connected to the extended end of the second rotating shaft, and the wrench includes a slide groove; the base is provided with a limiting member, the limiting member is located in the slide groove, the limiting member and the slide groove are matched in the upper limit position in the first rotation direction, and / or the limiting member and the slide groove are matched in the upper limit position in the third rotation direction.

[0022] It can be seen that providing a wrench makes it easier to operate the second rotating shaft, and the cooperation between the limiting member and the sliding groove can prevent the second rotating shaft from rotating beyond the stroke and causing structural damage.

[0023] According to the above solution, the self-locking flip bracket of the sight also includes a sleeve, which is located between the second connecting part and the base; the sleeve includes a notch, which is located at the second position.

[0024] It can be seen that the sleeve makes the first shaft rotate more smoothly and reduces the wear of the first shaft and the base. The setting of the notch portion enables the sleeve and the second connecting portion to have a maximum matching area, and there is no need to shorten the length of the sleeve to avoid the second position. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural diagram from a first perspective of an embodiment of the self-locking flip bracket of the sight of the present invention.

[0026] Figure 2 It is a structural exploded view of an embodiment of the self-locking flip bracket of the sight of the present invention.

[0027] Figure 3 This is a structural diagram from a second perspective of an embodiment of the self-locking flip bracket of the sight of the present invention when the rotating seat is in the working position.

[0028] Figure 4 yes Figure 3 Cross-sectional view at AA in.

[0029] Figure 5 yes Figure 4 Cross-sectional view at BB in.

[0030] Figure 6 This is a structural diagram from a second perspective of an embodiment of the self-locking flip bracket of the sight of the present invention when the rotating seat is between the working position and the ready-to-use position.

[0031] Figure 7 yes Figure 6 Cross-sectional view at CC in .

[0032] Figure 8 yes Figure 7 Cross-sectional view at DD in.

[0033] Figure 9 This is a structural diagram from a second perspective of an embodiment of the self-locking flip bracket of the sight of the present invention when the rotating seat is in the ready-to-use position.

[0034] Figure 10 yes Figure 9 Cross-sectional view at EE in FIG.

[0035] Figure 11 yes Figure 10 Cross-sectional view at FF in FIG.

[0036] Figure 12 1. It is a structural diagram of the first rotating shaft of an embodiment of the self-locking flip bracket of the sight of the present invention.

[0037] Figure 13 This is a diagram showing the connection relationship between the second rotating shaft, the connecting rod, and the wrench of the self-locking flip bracket embodiment of the sight of the present invention.

[0038] Figure 14 yes Figure 2 A local enlarged view of point G in the figure.

[0039] Figure 15 1. It is a structural diagram of a shaft sleeve of an embodiment of a self-locking flip bracket of a sighting device of the present invention.

[0040] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0041] See also Figures 1 to 11 ,A unified spatial rectangular coordinate system is established in each drawing, where the first direction is the X-axis direction and the second direction is the Y-axis direction.

[0042] See also Figure 1 The self-locking flip bracket of the sight is used to connect the sight to the firearm in a flippable manner.

[0043] See also Figure 2The self-locking flip bracket of the sight of this embodiment includes a rotating seat 1, a base 2, a first rotating shaft 3, a second rotating shaft 4, a sleeve 5, a first locking screw 61, a second locking screw 62, a torsion spring 7, a wrench 8 and a connecting rod 9.

[0044] See also Figure 2 The rotating seat 1 includes a first sleeve 11 and a sight mounting seat 12 connected to the outer periphery of the first sleeve 11. The first sleeve 11 includes a third mounting channel 13. The extending direction of the third mounting channel 13 is the X-axis direction.

[0045] Combine Figure 2 and Figure 14 The base 2 includes a second sleeve 24 and a fixing seat 25. The second sleeve 24 includes a first mounting channel 21, which extends in the X-axis direction. The base 2 also includes a second mounting channel 22, which extends in the Y-axis direction. The first mounting channel 21 and the second mounting channel 22 are interconnected, and the second channel 22 is located at a position away from the centerline of the first mounting channel 21. The point of connection between the first mounting channel 21 and the second mounting channel 22 is the second position of the present invention, which is a peripheral position within the first mounting channel 21, away from the centerline of the first mounting channel 21.

[0046] Combine Figure 1 、 Figure 2 and Figure 12 The extension direction of the first rotating shaft 3 is the X-axis direction. The first rotating shaft 3 includes a first connecting portion 34, a second connecting portion 35 and a shoulder 31. The second connecting portion 35, the shoulder 31 and the first connecting portion 34 are arranged in sequence along the positive direction of the X-axis. The extended end portion of the first connecting portion 34 and the extended end portion of the second connecting portion 35 are both provided with internal threaded holes. The extension directions of the two internal threaded holes are both in the X-axis direction. The second connecting portion 35 is cylindrical. The outer periphery of the cross-section of the first connecting portion 34 in the X-axis direction includes two opposite straight line segments and two opposite arc segments. The outer peripheral shape of the first connecting portion 34 is the same as the inner peripheral shape of the third mounting channel 13. The first connecting portion 34 is inserted into the third mounting channel 13 and the two are clearance-fitted.

[0047] Combine Figure 2 and Figure 4 The first locking screw 61 cooperates with the internal thread section of the first connecting part 34 to fasten the rotating seat 1 to the first connecting part 34, and the extended end of the first sleeve 11 located in the negative direction of the X-axis abuts against the side wall of the shoulder 31 in the positive direction of the X-axis.

[0048] Combine Figure 2 、 Figure 4 、 Figure 10 and Figure 12The outer periphery of the second connecting portion 35 includes a second recess 32, a third recess 33, and a second outer peripheral portion 36. The second outer peripheral portion 36 is the portion of the outer periphery of the second connecting portion 35 outside the second recess 32 and the third recess 33. The second recess 32 includes an arcuate groove extending inward from the outer periphery of the second connecting portion 35. The concave surface of the arcuate groove is a second arcuate surface 321, and the diameter of the second arcuate surface 321 is equal to the diameter of the second rotating shaft 4. The third recess 33 includes an arcuate groove extending inward from the outer periphery of the second connecting portion 35. The concave surface of the arcuate groove is a third arcuate surface 331, and the diameter of the third arcuate surface 331 is equal to the diameter of the second rotating shaft 4. The centerline of the third arcuate surface 331 is perpendicular to the centerline of the second arcuate surface 321, and the centerlines of the third arcuate surface 331 and the second arcuate surface 321 are both perpendicular to the axis of the first rotating shaft 3.

[0049] Combine Figure 2 and Figure 4 A shaft sleeve 5 is provided in the first mounting channel 21, and the shaft sleeve 5 includes a notch portion 51. The notch portion 51 is connected to the outer periphery of the shaft sleeve 5 along the negative direction of the Z axis. The notch portion 51 is located at the connection between the first mounting channel 21 and the second mounting channel 22 for avoidance. The second connecting portion 35 is installed in the shaft sleeve 5. The second connecting portion 35 can be rotated around its axis in the second rotation direction and the fourth rotation direction respectively. The extended end of the second sleeve 24 located in the positive direction of the X axis abuts against the side wall of the shoulder 31 located in the negative direction of the X axis; the second recess 32 and the third recess 33 can be rotated to the second position respectively by rotating the first rotating shaft 3.

[0050] Combine Figure 2 and Figure 14 The extended end of the first mounting channel 21 is provided with a screw mounting position 26. The first mounting channel 21 and the screw mounting position 26 are arranged sequentially in the negative direction of the X-axis. The inner diameter of the screw mounting position 26 is larger than the inner diameter of the first mounting channel 21. The second sleeve 24 also includes a first stopper 23. The first stopper 23 is an arc-shaped protrusion. The first mounting channel 21, the first stopper 23, and the screw mounting position 26 are arranged sequentially in the negative direction of the X-axis. The center of the arc of the first stopper 23 is on the axis of the first mounting channel 21, and the surface of the first stopper 23 facing its center is flush with the inner wall of the first mounting channel 21.

[0051] Combine Figure 2 、 Figure 4 and Figure 15 The extended end of the sleeve 5 includes a second limiting portion 52, which is an arc-shaped protrusion protruding from the outer periphery of the notch portion 51 along the radial direction of the sleeve 5. The first limiting portion 23 and the second limiting portion 52 are buckled into a circular ring and the two are matched in the circumferential limit direction.

[0052] Combine Figure 2 and Figure 4, the second locking screw 62 is located in the screw installation position, and the second locking screw 62 cooperates with the internal thread section of the second connecting portion 35 .

[0053] Combine Figure 2 、 Figure 5 and Figure 8 The second rotating shaft 4 is installed in the second installation channel 22. The outer periphery of the second rotating shaft 4 includes a first outer periphery 43 and a first recess 41. The first outer periphery 43 is the portion of the outer periphery of the second rotating shaft 4 other than the first recess 41. The first outer periphery 43 is the outer periphery of the second rotating shaft 4 in this embodiment. The first recess 41 is an arc-shaped groove that is concave inward from the outer periphery of the second rotating shaft 4. The concave surface of the arc-shaped groove is a first arc surface 441. The center line of the first arc surface 441 is perpendicular to the axis of the second rotating shaft 4. The diameter of the first arc surface 441 is equal to the outer diameter of the second connecting portion 35. Rotating the second rotating shaft 4 can rotate the first recess 41 to the second position. The extended end of the second rotating shaft 4 is provided with a torsion spring mounting position 42. The extended end of the second rotating shaft 4 is also connected to a cylindrical connecting rod 9. The extending direction of the connecting rod 9 is the Y-axis direction. The extended end of the connecting rod 9 is connected to a wrench 8. The outer periphery of the connecting rod 9 is provided with a There is a torsion spring 7, one end of the torsion spring 7 is located in the torsion spring installation position 42, and the other end of the torsion spring 7 is fixedly connected to the base 2. The second rotating shaft 4, the connecting rod 9 and the wrench 8 are arranged in sequence along the negative direction of the Y-axis; an arc-shaped slide groove 81 is provided on the positive side of the Y-axis of the wrench 8, and the slide groove 81 faces the side wall surface of the negative direction of the Y-axis of the base 2. A limiting member is provided on the negative side of the Y-axis of the fixed seat 25, and the limiting member is located in the slide groove 81. When the wrench 8 is pulled to drive the second rotating shaft 4 to rotate, the limiting member slides relative to the slide groove 81, and the extended ends of the slide groove 81 cooperate with the limiting member in the first rotation direction and the third rotation direction.

[0054] Combine Figure 1 、 Figure 2 、 Figures 3 to 5 and Figure 14 At this time, the rotating seat 1 is in the working position, the first recess 41 is in the first position, the angle between the center line of the first recess 41 and the X-axis is 45 degrees, the second recess 32 is in the second position, the second arc surface 321 and the inner wall surface of the second mounting channel 22 are on the same circumferential surface, the outer periphery of the second rotating shaft 4 coincides with the inner periphery of the first mounting channel 21 and the first outer peripheral portion 43 and the second arc surface 321 are clearance-fitted, and the first outer peripheral portion 43 limits the first rotating shaft 3 from rotating in the fourth rotation direction.

[0055] Since the second arc surface 321 and the inner wall surface of the second installation channel 22 are on the same circumference, the second shaft 4 can rotate in the second installation channel 22. Pulling the wrench 8 can rotate the second shaft 4 along the first rotation direction. During the rotation of the second shaft 4, the torsion spring 7 is compressed to store energy.

[0056] Combine Figure 1 、 Figure 2 、 Figures 6 to 8 and Figure 14 , at this time the second shaft 4 is Figures 3 to 5 The position shown is rotated 45 degrees along the first rotation direction, at which time the rotating seat 1 is in a position between the working position and the standby position. At this time, the first recess 41 is in the second position and faces the positive direction of the Z axis. When the first recess 41 is in the second position, the first arc surface 441 and the inner wall surface of the sleeve 5 are on the same circumference, the outer periphery of the second rotating shaft 4 does not overlap with the first mounting channel 21, and the first rotating shaft 3 can rotate in the first mounting channel 21 along the fourth rotation direction. When the second recess 32 leaves the second position and the third recess 33 has not rotated to the second position, the outer periphery of the second connecting portion 35 overlaps with the second mounting channel 22, and the second outer peripheral portion 36 is in a clearance fit with the first arc surface 441. The second outer peripheral portion 36 restricts the second rotating shaft 3 from rotating in the third rotation direction and the first rotation direction.

[0057] Combine Figure 1 、 Figure 2 、 Figures 9 to 11 and Figure 14 At this time, the rotating seat 1 rotates 90 degrees from the working position along the second rotation direction to the stand-by position, and the third recess 33 is in the second position. The third arc surface 331 of the third recess 33 is on the same circumference as the inner wall surface of the second mounting channel 22, and the outer periphery of the second connecting portion 35 does not overlap with the second mounting channel 22. The second rotating shaft 4 can rotate in the second mounting channel 22 along the third rotation direction. At this time, the wrench 8 is loosened, and the torsion spring 7 releases the stored energy. After the second rotating shaft 4 rotates 45 degrees in the third rotation direction in the second mounting channel 22, the first recess 41 leaves the second position and returns to the first position; after the first recess 41 returns to the first position, the outer periphery of the second rotating shaft 4 coincides with the first mounting channel 21, and the first outer peripheral portion 43 is clearance-fitted with the third recess 33. At this time, the first outer peripheral portion 43 restricts the first rotating shaft 3 from rotating in the second rotation direction and the fourth rotation direction.

[0058] The self-locking tilt bracket of the sight of the present invention maintains the swivel base 1 in both the working and standby positions through the locking structure between the first and second rotating shafts 3 and 4. Since the second rotating shaft 4 must be rotated to unlock, the self-locking tilt bracket of the sight has a more stable locking effect, making it more suitable for use in bumpy and vibrating environments. The first, second, and third recesses 41, 32, 33, each with a specific arc, provide a clearance fit between the first and second rotating shafts 3 and 4 in the locked state, preventing the swivel base 1 from shaking in both the working and standby positions. The provision of a torsion spring 7 ensures that the second rotating shaft 4 automatically resets after the swivel base 1 rotates to a specified position. The cooperation between the stopper and the slide groove 81 prevents the second rotating shaft 4 from excessive rotation.

[0059] In other embodiments, the first mounting channel does not include a bushing, and the second connecting portion is directly mounted within the first mounting channel, rotatably connected to the base. When the first recess is in the second position, the first recess faces the positive direction of the Z axis, and the first curved surface and the inner wall of the first mounting channel are on the same circumference.

[0060] Finally, it should be emphasized that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A self-locking flip bracket for a sight, comprising a base, a rotating base, and a first rotating shaft, wherein the base includes a first mounting channel arranged along a first direction, the first rotating shaft includes a first connecting portion and a second connecting portion, the first connecting portion being fixedly connected to the rotating base, and the second connecting portion being rotatably disposed within the first mounting channel, characterized in that: The base further includes a second installation channel arranged along a second direction, the second installation channel being communicated with the first installation channel; The self-locking flip bracket of the sight further includes a second rotating shaft, the second rotating shaft includes a first recess, the second rotating shaft is located in the second mounting channel, the first recess can be rotated from a first position to a second position along a first rotation direction, and the second position is located at the connection between the first mounting channel and the second mounting channel; The second connecting portion includes a second recess, and when the first recess is located at the second position, the second recess can be rotated along a second rotation direction to the second position; When the second recess is located at the second position, the first recess can be rotated along a third rotation direction to the first position; When the second recess is located at the second position and the first recess is located at the first position, the outer periphery of the second rotating shaft is engaged with the second recess in the second rotation direction and the fourth rotation direction. The first rotation direction is opposite to the third rotation direction, and the second rotation direction is opposite to the fourth rotation direction.

2. The self-locking flip bracket of the sight according to claim 1, characterized in that: The first concave portion includes a first arc surface, and / or the second concave portion includes a second arc surface.

3. The self-locking flip bracket of the sight according to claim 2, characterized in that: The diameter of the first arc surface is equal to the outer diameter of the second connecting portion, and / or the diameter of the second arc surface is equal to the diameter of the second rotating shaft.

4. The self-locking flip bracket of the sight according to claim 3, characterized in that: When the first recess is located at the second position, the first arc surface and the inner wall surface of the first installation channel are located at the same circumference, and / or when the second recess is located at the second position, the second arc surface and the inner wall surface of the second installation channel are located at the same circumference.

5. The self-locking flip bracket of the sight according to any one of claims 2 to 4, characterized in that: The second connecting portion further includes a third recessed portion, and when the first recessed portion is located at the second position, the third recessed portion can be rotated along the fourth rotation direction to the second position; When the third recess is located at the second position, the first recess can be rotated to the first position along the third rotation direction. When the third recess is located at the second position and the first recess is located at the first position, the outer periphery of the second rotating shaft cooperates with the second recess in the second rotation direction and the fourth rotation direction.

6. The self-locking flip bracket of the sight according to claim 5, characterized in that: When the second recess is located at the second position, the rotating seat is located at the working position; When the third recess is located at the second position, the rotating seat is located at the standby position.

7. The self-locking flip bracket of the sight according to claim 5, characterized in that: The third concave portion includes a third arc surface, and the diameter of the third arc surface is equal to the outer diameter of the second rotating shaft; A center line of the third arc surface and a center line of the second arc surface are perpendicular to each other.

8. The self-locking flip bracket of a sight according to any one of claims 1 to 4, characterized in that: The self-locking flip bracket of the sight further includes an elastic member, and two ends of the elastic member are respectively connected to the base and the second rotating shaft; When the second recess rotates from the second position to the first position, the elastic member stores energy.

9. The self-locking flip bracket of a sight according to any one of claims 1 to 4, characterized in that: The self-locking flip bracket of the sight includes a wrench; The wrench is connected to the extended end portion of the second rotating shaft, and the wrench includes a sliding groove; The base is provided with a limiting member, the limiting member is located in the sliding groove, the limiting member cooperates with the sliding groove in the first rotation direction, and / or the limiting member cooperates with the sliding groove in the third rotation direction.

10. The self-locking flip bracket of the sight according to any one of claims 1 to 4, characterized in that: The self-locking flip bracket of the sight further includes a shaft sleeve, which is located between the second connecting portion and the base; The sleeve includes a notch portion, and the notch portion is located at the second position.

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