Neck hanging support

Abstract

The utility model relates to the technical field of shooting supports, in particular to a neck hanging support. The neck hanging support comprises a mounting base, a fixing mechanism, a neck hanging piece and a locking mechanism. An opening communicated with the internal space of the mounting seat and a through hole are formed in the outer side face of the mounting seat, the opening extends in the first direction to form a first end and a second end, and the through hole is located in the side, away from the second end, of the first end; the fixing mechanism is connected with the mounting seat; one end of the neck hanging piece is connected to the mounting seat, and the other end of the neck hanging piece penetrates through the through hole and is provided with a clamping part; the lock catch mechanism comprises a push seat and a limiting seat, the push seat is movably connected to the opening in the first direction, the limiting seat is arranged in the inner space and connected with the push seat, and a buckling part opposite to the clamping part is arranged on the limiting seat. According to the invention, the push seat is pushed to switch between the first end part and the second end part, so that the neck hanging piece is quickly unlocked, a user can conveniently wear the neck hanging piece, and the use experience of the user is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of shooting brackets, in particular to a neck-hanging bracket. Background Art

[0002] At present, as people's living standards improve, photography is becoming more and more popular and used to record people's lives. Currently, a neck bracket has appeared on the market, which can be hung on the neck and can also be connected to shooting devices such as mobile phones or cameras. When the shooting device is not in use, the shooting device can be hung on the neck through the neck bracket, freeing your hands.

[0003] The problem with the existing neck-hanging bracket is that the wearing hole formed by the neck-hanging piece is small in size. For some users with larger heads, wearing the neck-hanging bracket is not convenient enough, which affects the user experience. Utility Model Content

[0004] The technical problem to be solved by the embodiments of the utility model is to provide a neck hanging bracket to solve the problems of inconvenience in wearing the neck hanging bracket and poor user experience in the prior art.

[0005] The neck bracket provided in the embodiment of the utility model comprises:

[0006] A mounting seat, an outer side of which is provided with an opening and a through hole connected to the inner space of the mounting seat, the opening extending in a first direction to form a first end and a second end, and the through hole is located on a side of the first end away from the second end;

[0007] A fixing mechanism connected to the mounting seat, the fixing mechanism being used to connect a photographing device;

[0008] A neck hanging piece, one end of which is connected to the mounting seat, and the other end of which is passed through the through hole, and a clamping portion is provided at the other end of the neck hanging piece;

[0009] A locking mechanism, comprising a push seat and a limit seat, wherein the push seat is movably connected to the opening in a first direction, the limit seat is installed in the internal space, and the limit seat is connected to the push seat, and a buckling portion opposite to the clamping portion is provided on the limit seat;

[0010] Wherein, when the push seat moves to the first end, the clamping portion cooperates with the buckling portion; when the push seat moves to the second end, the clamping portion disengages from the buckling portion.

[0011] In one embodiment, the snap-fitting portion is an insert block arranged on the side of the limiting seat facing the clamping portion, and a first clamping groove is provided on the side of the insert block facing the clamping portion, and the first clamping groove connects the two sides of the insert block in the axial direction of the through hole; the clamping portion is a second clamping groove arranged opposite to the first clamping groove.

[0012] In one embodiment, the other end of the neck hanging piece includes an end face and a peripheral surface arranged around the end face, the slot is arranged on the peripheral surface, and a first chamfer is provided at the connection position between the end face and the peripheral surface; and / or a second chamfer is provided at the connection position between the end wall of the insert block close to the through hole and the groove wall of the first slot.

[0013] In one embodiment, the second slot is disposed around the peripheral surface.

[0014] In one embodiment, the limiting seat is provided with a plug-in hole on the side facing the opening, and the pushing seat includes a pressure portion and a rod portion, the pressure portion is exposed on the outside of the mounting seat, one end of the rod portion is connected to the pressure portion, and the other end is passed through the opening and plugged into the plug-in hole.

[0015] In one embodiment, the locking mechanism further includes a first spring, which is connected to the limiting seat so as to be compressed, deformed and store energy when the buckling portion and the clamping portion are unlocked, and to reset the limiting seat when the energy is released.

[0016] In one embodiment, a clamping block is provided inside the mounting seat, one end of the first spring abuts against the clamping block, and the other end abuts against the limiting seat, a receiving groove is provided on the side of the clamping block facing the limiting seat, and one end of the first spring is arranged in the receiving groove.

[0017] In one embodiment, the fixing mechanism is detachably connected to the mounting base.

[0018] In one embodiment, the fixing mechanism comprises a connecting seat, the connecting seat comprises a first wall and a second wall arranged around the first wall, and a clamping block is arranged on the second wall;

[0019] The mounting seat comprises a mounting groove, the mounting groove is arranged toward the first wall, a groove wall of the mounting groove is provided with a boss, and the boss is spaced apart from the groove bottom to form a limiting space;

[0020] Wherein, when the connecting seat is accommodated in the installation groove, the connecting seat can be relatively rotated so that the clamping block can be accommodated in the limiting space.

[0021] In one embodiment, a guide groove extending in the second direction is provided at the groove bottom of the installation groove; a receiving groove is provided on the first wall, and a notch is provided on the groove wall of the receiving groove;

[0022] The neck bracket further includes a first locking member, the first locking member includes a pressure member and a clamping column passing through the guide groove, one end of the pressure member in the second direction is exposed outside the mounting seat, and the clamping column is connected between two ends of the pressure member; the second direction is perpendicular to the first direction;

[0023] Wherein, the first locking member is slidably connected to the mounting seat in the second direction, so that when the clamping block is accommodated in the limiting space, the clamping column can be clamped with the notch.

[0024] Compared with the prior art, the beneficial effect of the neck hanging bracket provided by the embodiment of the utility model is that the present application realizes quick unlocking of the neck hanging piece by pushing the push seat to switch between the first end and the second end, which is convenient for users to wear and improves the user experience.

[0025] Specifically, a clamping part is provided at the other end of the neck hanging piece; after the clamping part is placed in the through hole, it can cooperate with the buckle part to achieve locking, and at this time the push seat is located at the first end. When unlocking is required, the user can push the push seat in the opposite direction to move the push seat to the second end, and drive the limit seat to move, and finally separate the buckle part from the clamping part and unlock, and the other end of the neck hanging piece can be separated from the mounting seat, so that the user can remove and subsequently put on the neck hanging bracket again. It can be seen that the neck hanging bracket has stronger wear adaptability and better user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The specific implementation of the utility model will be further described in detail below with reference to the accompanying drawings and embodiments, in which:

[0027] Figure 1 It is a schematic diagram of the internal structure of the neck hanging bracket provided by an embodiment of the utility model;

[0028] Figure 2 It is a disassembled schematic diagram of the neck hanging member and the interior of the mounting seat of the neck hanging bracket provided by the embodiment of the utility model;

[0029] Figure 3 It is an internal schematic diagram of the mounting seat and the locking mechanism provided by the embodiment of the utility model;

[0030] Figure 4 It is a partial schematic diagram of a neck hanging piece provided by an embodiment of the utility model;

[0031] Figure 5 It is a disassembly schematic diagram of the locking mechanism provided in the embodiment of the utility model;

[0032] Figure 6 It is a three-dimensional schematic diagram of a neck hanging bracket provided by an embodiment of the utility model;

[0033] Figure 7It is a disassembly schematic diagram of the connecting seat and the mounting seat provided in the embodiment of the utility model;

[0034] Figure 8 It is a schematic diagram of the combination of the first locking member and the second spring provided in an embodiment of the utility model.

[0035] The reference numerals in the figures are:

[0036] 1000, neck bracket;

[0037] 10. mounting seat; 11. opening; 111. first end; 112. second end; 12. through hole; 13. clamping block; 131. receiving groove; 14. mounting groove; 141. boss; 15. limiting space; 16. guide groove; 17. blocking block;

[0038] 20, fixing mechanism; 21, connecting seat; 211, first wall; 211a, receiving groove; 211b, notch; 212, second wall; 212a, clamping block;

[0039] 30. Neck hanging piece; 31. Clamping portion; 311. Second clamping groove; 32. End surface; 33. Peripheral surface; 34. First chamfer;

[0040] 40, locking mechanism; 41, pushing seat; 411, pressure applying portion; 412, rod portion; 42, limiting seat; 421, buckling portion; 422, inserting block; 422a, first slot; 423, end wall; 424, second chamfer; 425, plug-in hole; 43, first spring;

[0041] 50. first locking member; 51. pressure member; 52. clamping column;

[0042] 60. Second spring. DETAILED DESCRIPTION

[0043] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. Now, in conjunction with the accompanying drawings, a preferred embodiment of the present utility model is described in detail.

[0044] The present utility model embodiment provides a neck hanging bracket 1000, such as Figure 1 , Figure 2 as well as Figure 6As shown, the neck hanging bracket 1000 includes a mounting seat 10, a fixing mechanism 20, a neck hanging member 30 and a locking mechanism 40. The outer side surface of the mounting seat 10 is provided with an opening 11 and a through hole 12 which are connected to the internal space of the mounting seat 10. The opening 11 is extended in a first direction (as shown in the X direction in the figure) to form a first end 111 and a second end 112. The through hole 12 is located on a side of the first end 111 away from the second end 112; the fixing mechanism 20 is connected to the mounting seat 10, and the fixing mechanism 20 is used to connect the shooting device; one end of the neck hanging member 30 is connected to the mounting seat 10, and the other end is passed through the through hole 12. The other end of the neck hanging member 30 is connected to the mounting seat 10. The end of the neck strap 40 is provided with a clamping portion 31; the locking mechanism 40 includes a push seat 41 and a limit seat 42, the push seat 41 is movably connected to the opening 11 in the first direction, the limit seat 42 is installed in the internal space, and the limit seat 42 is connected to the push seat 41, and a buckle portion 421 opposite to the clamping portion 31 is provided on the limit seat 42; wherein, when the push seat 41 moves to the first end 111, the clamping portion 31 cooperates with the buckle portion 421; when the push seat 41 moves to the second end 112, the clamping portion 31 is disengaged from the buckle portion 421. The present application realizes quick unlocking of the neck strap 30 by pushing the push seat 41 to switch between the first end 111 and the second end 112, which is convenient for users to wear and improves the user experience.

[0045] Specifically, a clamping portion 31 is provided at the other end of the neck hanging member 30; after the clamping portion 31 is placed in the through hole 12, it can cooperate with the buckle portion 421 to achieve locking, and at this time, the push seat 41 is located at the first end 111. When unlocking is required, the user can push the push seat 41 in the opposite direction to move the push seat 41 to the second end 112, and drive the limit seat 42 to move, and finally separate the buckle portion 421 from the clamping portion 31 to unlock, and the other end of the neck hanging member 30 can be separated from the mounting seat 10, so that the user can remove and subsequently put on the neck hanging bracket 1000 again. It can be seen that the neck hanging bracket 1000 has stronger wear adaptability and better user experience.

[0046] In the present application, the opening 11 may be a strip-shaped hole, which can play a guiding role so that the push seat 41 can drive the limit seat 42 to move to the correct position, thereby ensuring the stability of unlocking and locking.

[0047] In the present application, the push seat 41 is arranged outside the mounting seat 10 at the opening 11 to facilitate user operation. Preferably, the push seat 41 is also provided with anti-slip grooves on the side facing away from the opening 11 to increase contact friction and further facilitate the user to push the push seat 41.

[0048] It is worth mentioning that, in the present application, the unlocking or locking of the other end of the neck hanging piece 30 is performed in the through hole 12, and the neck hanging bracket 1000 has a better aesthetic appearance.

[0049] Reference Figure 2 and Figure 3 In one embodiment, the buckle portion 421 is an insert block 422 disposed on the side of the limiting seat 42 facing the clamping portion 31, and a first clamping groove 422a is disposed on the side of the insert block 422 facing the clamping portion 31, and the first clamping groove 422a communicates with both sides of the insert block 422 in the axial direction of the through hole 12; the clamping portion 31 is a second clamping groove 311 disposed opposite to the first clamping groove 422a. In this configuration, the first clamping groove 422a is clamped in the second clamping groove 311, and the locking is more secure and the structural stability is better.

[0050] Specifically, the first slot 422a includes two side slot walls that are arranged opposite to each other, and the second slot 311 is extended circumferentially along the other end of the neck hanging piece 30. The two side slot walls are located on both sides of the second slot 311 in the radial direction of the through hole 12 to limit the radial movement of the second slot 311 in the through hole 12, and the first slot 422a on both sides of the axial direction of the through hole 12 can also limit the axial and radial movement of the second slot 311 in the through hole 12 to maintain the stability after the two are connected.

[0051] In order to facilitate the cooperation between the first card slot 422a and the second card slot 311 and reduce the jamming during operation, there are many ways to set the first card slot 422a and the second card slot 311. Figure 4 In the first embodiment, the other end of the neck hanging member 30 includes an end face 32 and a peripheral surface 33 arranged around the end face 32, a slot is arranged on the peripheral surface 33, and a first chamfer 34 is arranged at the connection position between the end face 32 and the peripheral surface 33; in this way, when the other end of the neck hanging member 30 extends into the through hole 12, the first chamfer 34 can first abut against the first slot 422a, and drive the first slot 422a to move toward the second end 112 until it contacts the peripheral surface 33 and is smoothly placed in the second slot 311. Specifically, the first chamfer 34 can be annular, so that the user does not need to perform the locking operation at a specific angle. Figure 5 In the second embodiment, the second chamfer 424 is provided at the connection position between the end wall 423 of the plug block 422 close to the through hole 12 and the groove wall of the first groove 422a. In this way, the second chamfer 424 can first abut against the other end of the neck hanging member 30, and drive the limit seat 42 to gradually move toward the second end 112 until the first groove 422a contacts the peripheral surface 33 and is smoothly placed in the second groove 311. In the third embodiment, it is a combination of the first embodiment and the second embodiment. This makes the locking process smoother and prevents jamming.

[0052] Reference Figure 4 In one embodiment, the second slot 311 is arranged around the peripheral surface 33. In this way, the other end of the neck hanging member 30 does not need to be adjusted to a specific angle when it is matched with the first slot 422a. This simplifies the operation process, and the user does not need to struggle to find the correct alignment angle, saving time and energy, and can complete the locking operation more quickly, thereby improving efficiency.

[0053] Reference Figure 5 In one embodiment, a plug hole 425 is provided on the side of the limiting seat 42 facing the opening 11, and the push seat 41 includes a pressure portion 411 and a rod portion 412, the pressure portion 411 is exposed outside the mounting seat 10, one end of the rod portion 412 is connected to the pressure portion 411, and the other end is passed through the opening 11 and plugged into the plug hole 425. In this way, the push seat 41 and the limiting seat 42 are connected to the rod portion 412 through the plug hole 425, and the assembly is faster and more convenient. The separate design of the two is more conducive to assembly with the mounting seat 10, and can also reduce the difficulty of processing and manufacturing.

[0054] Specifically, the plug hole 425 and the rod 412 are interference-fitted so that the two will not separate after being connected. Preferably, glue can be added when the two are connected to make the connection more secure.

[0055] Reference Figure 3 In one embodiment, the locking mechanism 40 further includes a first spring 43, which is connected to the limiting seat 42, so as to be compressed and deformed to store energy when the locking portion 421 and the clamping portion 31 are unlocked, and to reset the limiting seat 42 when the energy is released. In this way, the first spring 43 can drive the first card slot 422a on the plug 422 to always have a tendency to move toward the second card slot 311, so that the two can keep against each other, so that the first card slot 422a and the second card slot 311 are kept in close connection, and the reliability after locking is improved. And after unlocking, the first spring 43 can compress and store energy, and drive the limiting seat 42 to reset when the energy is released, and then drive the push seat 41 to reset, so as to facilitate the user to re-lock the operation, and the operation is faster and more efficient.

[0056] Furthermore, a clamping block 212a is provided inside the mounting seat 10, one end of the first spring 43 abuts against the clamping block 13, and the other end abuts against the limiting seat 42, and a receiving groove 131 is provided on the side of the clamping block 13 facing the limiting seat 42, and one end of the first spring 43 is arranged in the receiving groove 131. In this way, the receiving groove 131 can limit and fix the first spring 43 to ensure that the first spring 43 is subjected to uniform force when compressed or stretched, which is conducive to the transmission of force between components, thereby improving the stability of the unlocking or locking process.

[0057] Reference Figure 6 and Figure 7 In one embodiment, the fixing mechanism 20 is detachably connected to the mounting base 10. With this arrangement, the user can separate the fixing mechanism 20 from the mounting base 10 according to the use requirements, and realize the handheld fixing mechanism 20 for shooting, and the neck bracket 1000 has better use flexibility.

[0058] In a specific embodiment, the fixing mechanism 20 includes a connecting seat 21, the connecting seat 21 includes a first wall 211 and a second wall 212 arranged around the first wall 211, and a clamping block 212a is arranged on the second wall 212; the mounting seat 10 includes a mounting groove 14, the mounting groove 14 is arranged toward the first wall 211, and a boss 141 is arranged on the groove wall of the mounting groove 14, and the boss 141 is arranged at a distance from the groove bottom to form a limited space 15; wherein, when the connecting seat 21 is accommodated in the mounting groove 14, the connecting seat 21 can be relatively rotated so that the clamping block 212a is accommodated in the limited space 15. In this way, when the connecting seat 21 is installed in the mounting groove 14, it can make the limited space 15 and the clamping block 212a cooperate or separate through a single rotation mode, so as to realize the locking or unlocking of the connecting seat 21 and the mounting seat 10, which is easy to operate, and the locking or unlocking process is relatively stable, reducing the possibility of misoperation.

[0059] Specifically, two bosses 141 are provided, and the two bosses 141 are symmetrically arranged on both sides of the installation groove 14. Two clamping blocks 212a are provided, and the two clamping blocks 212a are also symmetrically arranged on both sides of the second wall 212. The two bosses 141 are spaced apart at the bottom of the groove to form two limiting spaces 15. The two limiting spaces 15 are respectively matched with each clamping block 212a to make the connection more stable and avoid loosening of the connection during user movement.

[0060] More specifically, a blocking block 17 is provided at the groove wall between the boss 141 and the groove bottom. The blocking block 17 is used to limit the rotation direction and range of the clamping block 212a so that the clamping block 212a can only be rotated in a single direction to be placed in the limiting space 15.

[0061] It is worth mentioning that in this embodiment, when the connecting seat 21 is installed in the installation groove 14, the two clamping blocks 212a need to be misaligned with the two bosses 141, so that the connecting seat 21 can be smoothly placed in the installation groove 14, and then the clamping block 212a is screwed into the limiting space 15 to achieve connection through unidirectional rotation. In this way, through specific operation steps, the user can be more clear about whether the connecting seat 21 and the installation seat 10 are in place, and the risk of the fixing mechanism 20 falling due to misoperation can be prevented.

[0062] To further prevent the clamping block 212a from being separated from the limiting space 15, refer to Figure 7In one embodiment, a guide groove 16 extending in a second direction perpendicular to the first direction (as shown in the Y direction of the figure) is provided at the bottom of the groove; a receiving groove 211a is provided on the first wall 211, and a notch 211b is provided on the groove wall of the receiving groove 211a; the neck bracket 1000 also includes a first locking member 50, the first locking member 50 includes a pressure member 51 and a clamping column 52 passing through the guide groove 16, one end of the pressure member 51 in the second direction is exposed outside the mounting seat 10, and the clamping column 52 is connected between the two ends of the pressure member 51; wherein the first locking member 50 is slidably connected to the mounting seat 10 in the second direction, so that when the clamping block 212a is accommodated in the limiting space 15, the clamping column 52 can be clamped with the notch 211b. With such a configuration, when the clamping block 212a is located in the limiting space 15, the clamping column 52 and the notch 211b can limit the rotation of the connecting seat 21, thereby preventing the clamping block 212a from being separated from the limiting space 15. One end of the pressure member 51 is exposed outside the mounting seat 10, which facilitates the user to separate the clamping column 52 from the notch 211b by controlling the pressure member 51, thereby releasing the rotation restriction on the connecting seat 21. The setting of the guide groove 16 enables the clamping column 52 to move in the required direction, thereby preventing the clamping column 52 from being offset and stuck in the notch 211b.

[0063] Further, refer to Figure 8 The neck bracket 1000 further includes a second spring 60, which is connected to the first locking member 50, so as to deform under pressure to store energy when the locking column 52 is separated from the notch 211b, and reset the locking column 52 when releasing the energy. The second spring 60 makes the first locking member 50 always have a tendency to move outward. The user can unlock the first locking member 50 by applying pressure to overcome the elastic force, and reset the first locking member 50 by the elastic force of the second spring 60 itself when no force is applied, thereby reducing the operation steps and making the operation faster and more efficient.

[0064] It should be understood that the above embodiments are only used to illustrate the technical solutions of the present utility model rather than to limit it. For those skilled in the art, the technical solutions described in the above embodiments can be modified, or some of the technical features therein can be replaced by equivalents; and all these modifications and replacements should fall within the scope of protection of the claims attached to the present utility model.

Claims

1. A neck bracket, characterized in that: include: A mounting seat, an outer side of which is provided with an opening and a through hole connected to the inner space of the mounting seat, the opening extending in a first direction to form a first end and a second end, and the through hole is located on a side of the first end away from the second end; A fixing mechanism connected to the mounting seat, the fixing mechanism being used to connect a photographing device; A neck hanging piece, one end of which is connected to the mounting seat, and the other end of which is passed through the through hole, and a clamping portion is provided at the other end of the neck hanging piece; A locking mechanism, comprising a push seat and a limit seat, wherein the push seat is movably connected to the opening in a first direction, the limit seat is installed in the internal space, and the limit seat is connected to the push seat, and a buckling portion opposite to the clamping portion is provided on the limit seat; Wherein, when the push seat moves to the first end, the clamping portion cooperates with the buckling portion; when the push seat moves to the second end, the clamping portion disengages from the buckling portion.

2. The neck support according to claim 1, characterized in that: The buckling portion is an insert block arranged on the side of the limiting seat facing the clamping portion, and a first clamping groove is provided on the side of the insert block facing the clamping portion, and the first clamping groove connects the two sides of the insert block in the axial direction of the through hole; the clamping portion is a second clamping groove arranged opposite to the first clamping groove.

3. The neck support according to claim 2, characterized in that: The other end of the neck hanging piece includes an end face and a peripheral surface arranged around the end face, the second slot is arranged on the peripheral surface, and a first chamfer is provided at the connection position between the end face and the peripheral surface; and / or a second chamfer is provided at the connection position between the end wall of the insert block close to the through hole and the groove wall of the first slot.

4. The neck support according to claim 3, characterized in that: The second clamping groove is arranged around the peripheral surface.

5. The neck support according to claim 3, characterized in that: The limiting seat is provided with a plug-in hole on one side facing the opening, and the pushing seat includes a pressure portion and a rod portion, the pressure portion is exposed on the outside of the mounting seat, one end of the rod portion is connected to the pressure portion, and the other end is passed through the opening and plugged into the plug-in hole.

6. The neck support according to claim 1, characterized in that: The locking mechanism also includes a first spring, which is connected to the limiting seat so as to be compressed, deformed and store energy when the buckling portion and the clamping portion are unlocked, and to reset the limiting seat when the energy is released.

7. The neck support according to claim 6, characterized in that: A clamping block is provided inside the mounting seat, one end of the first spring abuts against the clamping block, and the other end abuts against the limiting seat, a side of the clamping block facing the limiting seat is provided with a receiving groove, and one end of the first spring is arranged in the receiving groove.

8. The neck support according to any one of claims 1 to 7, characterized in that: The fixing mechanism is detachably connected to the mounting seat.

9. The neck support according to claim 8, characterized in that: The fixing mechanism comprises a connecting seat, the connecting seat comprises a first wall and a second wall arranged around the first wall, and a clamping block is arranged on the second wall; The mounting seat comprises a mounting groove, the mounting groove is arranged toward the first wall, a groove wall of the mounting groove is provided with a boss, and the boss is spaced apart from the groove bottom to form a limiting space; Wherein, when the connecting seat is accommodated in the installation groove, the connecting seat can be relatively rotated so that the clamping block can be accommodated in the limiting space.

10. The neck support according to claim 9, characterized in that: A guide groove extending in the second direction is provided at the bottom of the installation groove; a receiving groove is provided on the first wall, and a notch is provided on the groove wall of the receiving groove; The neck bracket further includes a first locking member, the first locking member includes a pressure member and a clamping column passing through the guide groove, one end of the pressure member in the second direction is exposed outside the mounting seat, and the clamping column is connected between two ends of the pressure member; the second direction is perpendicular to the first direction; Wherein, the first locking member is slidably connected to the mounting seat in the second direction, so that when the clamping block is accommodated in the limiting space, the clamping column can be clamped with the notch.

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