Locking mechanism for left-right swing of chair seat

Abstract

The utility model discloses a locking mechanism for left-right swing of a chair seat, which comprises a moving support and a fixed seat, the moving support can swing left and right relative to the fixed seat, pin holes are arranged on the moving support and the fixed seat, a driving component is arranged to drive a locking pin to move to be matched with the pin holes, and the locking mechanism can swing left and right by changing the condition that the locking pin is inserted into the pin holes. Namely, the locking pin is simultaneously inserted into the pin holes preset in the moving bracket and the fixed seat or the locking pin is only inserted into the pin hole preset in the moving bracket, so that the moving bracket can be switched between a locking state and a swinging state. The chair seat can swing left and right, so that compression and even injury to the lumbar vertebra when a user sits can be relieved; a locking mechanism capable of swinging leftwards and rightwards is arranged on the chassis, so that a user can trigger a locking mechanism switch to lock the swinging function in a scene that the seat does not need to swing leftwards and rightwards, and different use scene requirements of the user are met; the locking mechanism adopts a mode that a bolt is matched with a pin hole, and is simple in structure and low in cost.

Description

Technical Field

[0001] The utility model relates to a chair, in particular to a locking mechanism for the chair seat to swing left and right. Background Art

[0002] Nowadays, users have higher and higher requirements for the comfort of office and study chairs. Manufacturers are improving user comfort in terms of backrests, lumbar support, seats, and additional chair functions.

[0003] There is a kind of chair whose seat chassis is dynamically designed. The chassis includes a fixed seat fixed to the seat support rod, a bracket for installing the seat cushion, cranks arranged on both sides of the bracket, and a connecting plate fixed in the middle of the crank and used to connect the backrest. The bracket, crank, etc. are connected by various pins to form a crank-connecting rod mechanism, so that when the user leans on the backrest or leaves the backrest, the seat can rise and fall according to the user's weight, reducing the "back rubbing feeling" and improving the user's leaning comfort; a motion bracket is set between the bracket and the fixed seat, and the motion bracket is hinged to the fixed seat. The motion bracket can tilt and swing left and right relative to the fixed seat to prevent the user from sitting in the same posture for a long time, which will cause discomfort symptoms for a long time. Although the seat can be tilted to the left or right to relieve the pressure on the spine caused by long-term sitting, during normal office work, a corresponding locking mechanism needs to be set on the seat to meet the user's need to keep the seat in a normal state when the seat does not need to swing left and right. Summary of the invention

[0004] The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and to provide a locking mechanism for swinging a seat left and right. A moving bracket of the seat chassis is hinged to a fixed seat along a front-rear center line of the fixed seat. The moving bracket can swing left and right relative to the fixed seat. Pin holes are provided in the moving bracket and the fixed seat, and the insertion condition of a movable locking pin is changed to change the state of the pin hole, thereby changing the locked or swingable state of the moving bracket.

[0005] The technical solution of the utility model is achieved in this way:

[0006] A locking mechanism for swinging a chassis left and right, comprising a moving bracket and a fixed seat hinged to the moving bracket at a middle position, the moving bracket can tilt and swing left and right relative to the fixed seat, and also comprises a locking device, the locking device comprising a driving component and a locking pin, the driving component can drive the locking pin to slide in holes opened in the moving bracket and the fixed bracket, when the driving component drives the locking pin to simultaneously insert into the moving bracket and the fixed seat, the moving bracket is locked relative to the fixed seat and cannot tilt and swing left and right; when the driving component drives the locking pin to insert into only one of the moving bracket or the fixed seat, or when the locking pin is completely disengaged from the moving bracket and the fixed seat, the moving bracket can tilt and swing left and right relative to the fixed seat.

[0007] The motion bracket can tilt and swing left and right relative to the fixed seat, so that the seat can swing with the left and right swing of the body when the user sits, reducing the pressure and damage to the lumbar spine caused by sitting for a long time; for situations where users need to concentrate highly on work or study and require the seat to remain horizontal, the locking device can be turned on to relatively fix the position of the motion bracket, so that the seat can be locked and kept horizontal when swinging left and right; the fixed seat is fixed, and the motion bracket can swing left and right, and pin holes are provided on both. A movable pin and the pin holes of the two are used to change whether the swing of the motion bracket is restricted, thereby realizing the locking and swinging state switching of the swing of the motion bracket. This implementation method has a simple and compact structure and is easy for users to operate.

[0008] Preferably, side wings extend symmetrically on the left and right sides of the front of the moving bracket, and the side wings include wing plates with vertically bent edges; side ears extend symmetrically on the left and right sides of the front of the fixed seat, and the side ears include ear plates with vertically bent edges; the wing plates and the ear plates are staggered up and down in some positions, and guide holes and locking holes are provided in the staggered parts, the guide holes are arranged on the wing plates, and the locking holes are arranged on the ear plates; the locking pin is inserted into the guide hole, and the locking pin is moved under the control of the driving assembly, and when the locking pin is inserted into the guide hole and the locking hole at the same time, the moving bracket is in a locked state; when the locking pin leaves the locking hole and is only inserted into the guide hole, the moving bracket is unlocked. The wing plates and ear plates staggered up and down facilitate the setting of guide holes and locking holes, so that the fixing pin can be inserted in the guide hole and the locking hole at the same time, so that the swing of the moving bracket is restricted and cannot swing; or the fixing pin is only inserted in the guide hole, so that the swing of the moving bracket is not restricted and can swing; the insertion position of the locking pin is set on the left and right sides of the moving bracket and the fixed seat, so that the locking force arm for locking the swing of the moving bracket is longer, thereby enhancing the locking effect.

[0009] Preferably, the ear plate includes ears perpendicular to the left and right side walls of the fixing seat, the ears continue to extend upward to form lugs, the lugs are staggered up and down with the adjacent wing plates, and the lugs are located outside the adjacent wing plates, and the locking holes are arranged on the lugs. The staggered wing plates and ear plates are convenient for setting the guide holes and the locking holes, and the ears and lugs arranged on one side, on the one hand, are easy to realize that the fixing pin can be inserted into the guide hole and the locking hole at the same time or only into the guide hole, and on the other hand, the production cost is saved.

[0010] Preferably, the driving assembly includes a locking bracket fixed on the front wall of the moving bracket and a wire control, which includes an outer sleeve and a pull wire that is telescopically movable in the outer sleeve. The outer sleeve is installed on the locking bracket, and the portion of the pull wire exposed from the outer sleeve is connected to a pull wire head. A compression spring is also provided between the pull wire head and the locking bracket, and the compression spring is arranged along the direction in which the pull wire extends. Torsion springs are symmetrically provided on the left and right sides of the pull wire head. The loop in the middle of the torsion spring is sleeved on a fastening screw connected to the upper part of the moving bracket so that the torsion spring as a whole rotates around the fastening screw. The torsion spring has an elastic arm 1 and an elastic arm 2 respectively arranged on both sides of the fastening screw. The pull wire head directly or indirectly acts on the elastic arm 1, and the elastic arm 2 is bent and connected to the locking pin after passing through the movable hole reserved on the wing plate. When the pull wire moves in the shortening direction, the compression spring is compressed while the elastic arm 1 is rotated by the pull wire head to generate a reset elastic force, and the locking pin moves synchronously to insert into or leave the locking hole. When the pull wire is released, that is, moves in the lengthening direction, the compression spring releases the elastic force to help the pull wire head, the torsion spring and the locking pin to reset. The length of the cable is controlled by a combination of wire control and compression spring, thereby changing the position of the cable head, driving the torsion spring directly or indirectly in contact with the cable head to rotate, and finally the elastic arm of the torsion spring moves the fixing pin to achieve the swing state change of the motion bracket relative to the fixed seat; this implementation method makes full use of the original structure of the motion bracket and the fixed seat to achieve the left and right swing locking function, making the overall structure of the chassis compact, and the cable and outer sleeve are flexible, and the terminal switch position of the cable length is not limited. It can be set at any position convenient for the seat user to operate.

[0011] Preferably, the pull-wire head directly acts on the elastic arm 1, which means that a ring is formed at the end of the elastic arm 1, the ring is inserted on the pull wire, and the ring abuts against the pull-wire head. The pull-wire head directly acts on the elastic arm 1, which is suitable for the chassis in which the pull wire direction is parallel to the front-rear direction of the fixing seat when the wire control is installed.

[0012] Preferably, the pull wire head indirectly acts on the elastic arm 1, which means that: the driving assembly also includes a dial plate, which includes an L-shaped dial part and an abutment part, and the intersection of the dial part and the abutment part is hinged on the upper surface of the motion bracket; the end of the elastic arm 1 is bent and inserted on the dial part, and the pull wire head abuts the abutment part. The use of the dial plate allows the pull wire head to indirectly act on the elastic arm 1, which is suitable for the chassis in which the pull wire direction is perpendicular to the front and rear direction of the fixed seat when the wire control is installed; through the movement of the pull wire becoming longer and shorter, the dial plate can rotate along the hinge center.

[0013] Preferably, the end of the abutment portion extends downward to form an abutment block, the wire pull head abuts against the left side of the abutment block, and the compression spring abuts against the right side of the abutment block. The wire pull and the wire pull head drive the dial plate to rotate, so that the toggle portion drives the elastic arm 1 to rotate, and then the elastic arm 2 drives the locking pin to move. The abutment portion abuts against the wire pull head, and the abutment portion can convert the change in the wire pull length into the rotation of the dial plate, so that the torsion spring elastic arm 2 can drive the locking pin to move, thereby realizing the switching of the locking state or the swinging state of the motion bracket.

[0014] The design starting point, concept and beneficial effects of the utility model using the above technical solution are:

[0015] The locking mechanism for swinging the seat left and right of the present technical solution is that the moving bracket of the seat chassis is hinged to the fixed seat along the front and rear center line of the fixed seat, so the moving bracket can swing left and right relative to the fixed seat, pin holes are provided in both the moving bracket and the fixed seat, and a driving component is provided to drive the locking pin to move and cooperate with the pin hole, and the moving bracket can be switched to a locked or swingable state by changing the insertion condition of the locking pin into the pin hole, that is, the locking pin is inserted into the preset pin holes on the moving bracket and the fixed seat at the same time, or the locking pin is only inserted into the preset pin hole on the moving bracket.

[0016] The chair seat of this solution can swing left and right as the user moves left and right, which can relieve the pressure and even damage to the lumbar spine when the user is sitting; a locking mechanism for swinging left and right is set on the chassis, so that the user can trigger the locking mechanism switch to lock the swing function when the chair seat does not need to swing left and right, so as to meet the user's needs in different usage scenarios; the locking mechanism adopts a method of matching a pin and a pin hole, which has a simple structure and low cost. The pin can also withstand a large locking shear force, and the locking mechanism is arranged on the original chassis structure, making the overall structure of the chassis compact; a wire-controlled movable pin is adopted, and since the length of the wire control is optional and the pull rope of the wire control is flexible, the terminal trigger switch of the wire control can be set at any position that is convenient for the user to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is an overall schematic diagram of the seat chassis related to Embodiment 1 of the present utility model;

[0018] Figure 2 This is an exploded schematic diagram of the seat chassis related to Embodiment 1 of the present utility model;

[0019] Figure 3 A side view of the supporting seat of the seat chassis related to the first embodiment of the utility model in a raised state;

[0020] Figure 4 It is a front view of the movable bracket of the seat chassis related to the first embodiment of the utility model in a horizontal state;

[0021] Figure 5 It is a front view of the motion bracket of the seat chassis related to the first embodiment of the utility model in a left-leaning state;

[0022] Figure 6 It is a front view of the motion bracket of the seat chassis related to the first embodiment of the utility model in a right-leaning state;

[0023] Figure 7 It is a three-dimensional diagram of embodiment 1 of the utility model;

[0024] Figure 8 This is an exploded view of Example 1 of the utility model;

[0025] Fig. 9 It is a three-dimensional view and a partial cross-sectional view of the embodiment 1 of the utility model in a swing unlocked state;

[0026] Fig.10 It is a side view and a partial cross-sectional view of the embodiment 1 of the utility model in a swing-unlocked state;

[0027] Fig.11 This is a three-dimensional diagram of the swing of embodiment 1 of the utility model in a locked state;

[0028] Fig.12 A side view and a partial cross-sectional view of the embodiment of the utility model in a swing-locked state;

[0029] Fig.13 It is a three-dimensional diagram of embodiment 2 of the present utility model;

[0030] Fig.14 This is a three-dimensional diagram of embodiment 2 of the utility model from another direction.

[0031] The reference numerals are: moving bracket 1; side wing 101; wing plate 102; guide hole 103; waist hole 104; fixing seat 2; side ear 201; ear plate 202; locking hole 203; support ear 204; lug 205; rotating shaft 206; swing compression spring 207; moving bracket 3; driving assembly 301; locking bracket 3011; wire control 3012; outer sleeve 30121; pull wire 30122; pull wire head 30123; compression spring 301 3; torsion spring 3014; elastic arm 1 30141; elastic arm 2 30142; collar 30143; fastening screw 3015; movable hole 3016; locking pin 302; dial plate 4; dial portion 401; abutment portion 402; abutment block 4021; supporting seat 5; supporting plate 501; vertical plate 502; rotating plate 6; connecting plate 601; third pin shaft 7; first pin shaft 8; guiding mechanism 9; limiting square groove 901; second pin shaft 902. DETAILED DESCRIPTION

[0032] The present invention is further described below with reference to specific embodiments. Figure 1-14 :

[0033] Example 1: Figure 1-12As shown, a locking mechanism for the left and right swing of the chassis is a part of the chassis. The chassis includes a fixed seat 2, a supporting seat 5 for supporting a seat cushion, and rotating plates 6 arranged on the left and right sides of the supporting seat 5. The tails of the two rotating plates 6 are equipped with connecting plates 601 for connecting the seat back; the chassis also includes a moving bracket 1 arranged between the fixed seat 2 and the supporting seat 5.

[0034] Specifically, Figure 1 and Figure 3 As shown, the rotating plate 6 is in an inclined state, and the upper end of the rotating plate 6 is hinged to the supporting seat 5 through the third pin shaft 7; the lower end of the rotating plate 6 is hinged to the moving bracket 3 through the first pin shaft 8; a guiding mechanism 9 for guiding the supporting seat 5 to rise and fall is provided between the supporting seat 5 and the moving bracket 3, the supporting seat 5 includes a supporting plate 501 and a vertical plate 502 hanging down on the left and right sides of the supporting plate 501, the guiding mechanism 9 includes a limiting square groove 901 and a second pin shaft 902, the limiting square groove 901 is opened on one of the vertical plate 502 or the moving bracket 3, and the second pin shaft 902 is connected to the vertical plate 502 or the moving bracket 3. The second pin 902 is inserted into the limiting square groove 901; the supporting seat 5, the moving bracket 3 and the pins form a crank connecting rod mechanism, so when the actual seat is installed, the connecting plate 502 is connected to the seat back, and when the user leans on or leaves the seat back, the connecting plate 502 drives the rotating plate 6 to rotate synchronously, so that the rotating plate 6 drives the supporting seat 5 to rise and fall, and the second pin 902 and the limiting square groove 901 slide relative to each other to limit the range of the supporting seat to rise and fall, that is, as the user leans forward or backward, the seat can adapt to the user's weight rise and fall; Figure 1 The supporting seat 5 is in a horizontal state. Figure 3 The supporting seat 5 is in a raised state.

[0035] To further explain, Figure 4 , Figure 5 and Figure 6 As shown, on the basis that the supporting seat 5 can adapt to the user's weight and can be raised and lowered as the user leans forward or backward, a motion bracket 3 is arranged between the fixed seat 2 and the supporting seat 5; the motion bracket 3 and the fixed seat 2 are both frame structures, and on the front and rear symmetrical center line of the fixed seat 2, the motion bracket 3 is rotatably connected to the fixed seat 2 through the front and rear sides of the rotating shaft 206, and the rotating shaft 206 not only plays a supporting role, but also allows the motion bracket 3 to tilt and swing left and right relative to the fixed seat 2; Figure 4 The motion bracket 3 is in a horizontal state. Figure 5 The motion bracket 3 is in a left-leaning swing state. Figure 6 The motion bracket 3 is in a right-leaning swing state. Fig. 9As shown, in order to limit the swinging range of the moving bracket 3 and prevent the moving bracket 3 from hitting the fixing base 2 to cause damage and abnormal noise, waist-shaped holes 104 are preset on the left and right sides of the fixing base 2, and the first pin shaft 8 passes through the waist-shaped holes 104. When the moving bracket 3 swings left and right, the first pin shaft 8 moves up and down in the waist-shaped holes 104.

[0036] When the user needs to tilt the motion bracket 3 left and right to lock and keep it in a horizontal state, the chassis is provided with a locking mechanism for swinging left and right. Figure 7 and Figure 8 As shown, the locking mechanism includes, in addition to the above-mentioned fixing base 2 and the moving bracket 1 that swings left and right relative to the fixing base 2, a locking device 3 having a locking pin 302 and a driving component 301 that drives the locking pin 302 to move.

[0037] Specific instructions, such as Figure 8 As shown, side wings 101 extend symmetrically from the left and right sides of the front of the motion bracket 1, and the side wings 101 include wing plates 102 with vertically bent edges; side ears 201 extend symmetrically from the left and right sides of the front of the fixing seat 2, and the side ears 201 include ear plates 202 with vertically bent edges, and the ear plates 202 include supporting ears 204 perpendicular to the left and right side walls of the fixing seat 2, and the supporting ears 204 continue to extend upward to form lugs 205; the lugs 205 are staggered with the adjacent wing plates 102, and the lugs 205 are located on the adjacent wing plates 1 02 outside; the locking hole 203 is set on the lug 205, the guide hole 103 is set on the wing plate 102, the locking pin 302 can be inserted in the guide hole 103 and the locking hole 203 at the same time, or the locking pin 302 can also leave the locking hole 203 and only be inserted in the guide hole 103; the locking pin 302 is arranged on the left and right side wings 101 and the side ears 201 of the moving bracket 1 and the fixed seat 2, which can increase the locking force arm of the locking mechanism to lock the swing of the moving bracket 1 and enhance the swing locking effect.

[0038] Further explanation, such as Figure 7 and Fig.11As shown, the driving component 301 includes a locking bracket 3011 fixed on the front wall of the motion bracket 1, and a wire control 3012, the wire control 3012 includes an outer sleeve 30121 and a pull wire 30122 that telescopes in the outer sleeve 30121, the outer sleeve 30121 is installed on the locking bracket 3011, the part of the pull wire 30122 exposed from the outer sleeve 30121 is connected to a pull wire head 30123, a compression spring 3013 is further provided between the pull wire head 30123 and the locking bracket 3011, the compression spring 3013 is arranged along the extending direction of the pull wire 30122, and the left and right sides of the pull wire head 30123 are symmetrically provided with torsion springs 3014, and the middle of the torsion spring 3014 The loop is put on a fastening screw 3015 connected to the upper part of the moving bracket 1 to make the torsion spring 3014 rotate around the fastening screw 3015 as a whole. The torsion spring 3014 has an elastic arm 1 30141 and an elastic arm 2 30142 respectively arranged on both sides of the fastening screw 3015. A ring 30143 is formed at the end of the elastic arm 1 30141. The ring 30143 is inserted into the pull wire 30122, and the pull wire head 30123 directly abuts against the abutting ring 30143, that is, the pull wire head 30123 directly acts on the elastic arm 1 30141, and the elastic arm 2 30142 is bent and passes through the movable hole 3016 reserved on the wing plate 102 and then connected to the locking pin 302.

[0039] To further explain, Fig.11 and Fig.12 As shown, when the pull wire 30122 moves in the shortening direction, the pull wire head 30123 drives the elastic arm 1 30141 to rotate, and at the same time, the compression spring 3013 is compressed to generate a restoring elastic force, and the elastic arm 2 30142 moves the locking pin 302 to insert into the locking hole 203. At this time, when the locking pin 302 is inserted into the guide hole 103 and the locking hole 203 at the same time, the swing of the motion bracket 1 is restricted, and the left and right swinging action of the chassis is locked; Figure 7 , Fig. 9 and Fig.10 As shown, when the pull wire 30122 is released and moves in the lengthening direction, the compression spring 3013 releases the elastic force to help the pull wire head 30123 and the torsion spring 3014 to reset, and the elastic arm 2 30142 pushes back the locking pin 302. At this time, the locking pin 302 leaves the locking hole 203 and is only inserted in the guide hole 103. The swing of the motion bracket 1 is not restricted, and the left and right swinging action of the chassis is restored.

[0040] To further illustrate, in order to ensure the smoothness of the swinging motion changes of the motion bracket 1 and the corresponding elastic assistance required for the motion changes, a swing compression spring 207 is provided between the left and right side wings 101 and the side ears 201. The swing compression spring 207 can be compressed when the motion bracket 1 swings to make the swinging motion smooth, and generate a reset elastic force to assist the motion bracket 1 in resetting. However, the detailed installation structure of the swing compression spring 207 in this embodiment is not explained.

[0041] Corresponding elastic mechanisms are provided on the chassis for the lifting and lowering of the supporting seat 5 and the swinging of the moving bracket 1, which will not be elaborated in detail in this embodiment.

[0042] Example 2: Fig.13 and 14 As shown, the difference between this embodiment and the embodiment 1 is that the pull head 30123 indirectly acts on the elastic arm 1 30141, the driving assembly 301 also includes a dial plate 4, the dial plate 4 includes an L-shaped dial portion 401 and an abutment portion 402, and the intersection of the dial portion 401 and the abutment portion 402 is hinged on the upper surface of the motion bracket 1; the end of the elastic arm 1 30141 is bent and inserted into the dial portion 401, and the pull head 30123 Abutting against the abutment portion 402; the end of the abutment portion 402 extends downward to form an abutment block 4021, the pull wire head 30123 abuts against the left side of the abutment block 4021, and the compression spring 3013 abuts against the right side of the abutment block 4021. The pull wire 30122 and the pull wire head 30123 drive the shift plate 4 to rotate, so that the shifting portion 401 drives the elastic arm 1 30141 to rotate, and then the elastic arm 2 30142 drives the locking pin 302 to move.

[0043] Specifically, when the pull wire 30122 moves in the shortening direction, the pull wire head 30123 abuts against the abutting portion 402 to make the dial plate 4 rotate. At this time, the compression spring 3013 is compressed to generate a restoring elastic force, and the toggle portion 401 synchronously drives the elastic arm 1 30141, that is, the torsion spring 3014 to rotate. At the same time, the elastic arm 2 30142 drives the locking pin 302 to move so as to insert into the locking hole 203. Fig.12 As shown in the figure, when the locking pin 302 is inserted into the guide hole 103 and the locking hole 203 at the same time, the swing of the moving bracket 1 is restricted, and the left and right swinging action of the chassis is locked; when the pull wire 30122 is released, that is, it moves in the lengthening direction, the compression spring 3013 releases the elastic force to help the pull wire head 30123 and the dial plate 4 to reset, and the dial part 401 synchronously pulls back the elastic arm 1 30141, that is, the torsion spring 3014 rotates back, and at the same time, the elastic arm 2 30142 pulls back the locking pin 302, as shown in the figure. Fig.10 As shown, at this time, when the locking pin 302 leaves the locking hole 203 and is only inserted into the guide hole 103, the swing of the motion bracket 1 is not restricted, and the left and right swinging action of the chassis is restored.

[0044] The main difference between the two embodiments lies in whether the pull wire head 30123 acts on the elastic arm 30141 directly or indirectly. When the pull wire head 30123 acts on the elastic arm 30141 directly, the wire control 3012 can be installed in the front-to-back direction of the fixed seat 2. When the pull wire head 30123 acts on the elastic arm 30141 indirectly, the wire control 3012 can be installed perpendicular to the front-to-back direction of the fixed seat 2. The choice of the installation direction of the wire control 3012 can be determined in combination with the layout of the chassis functions.

[0045] The above schematically describes the present invention and its implementation methods, which are not restrictive. The drawings show only one implementation method of the present invention, and the actual structure is not limited thereto. Therefore, if ordinary technicians in this field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the present invention, they should all fall within the protection scope of the present invention.

Claims

1. A locking mechanism for swinging a chassis left and right, comprising a moving bracket (1) and a fixing seat (2) hinged to the moving bracket (1) at a middle position, wherein the moving bracket (1) can tilt and swing left and right relative to the fixing seat (2), and is characterized in that: The invention also comprises a locking device (3), wherein the locking device (3) comprises a driving component (301) and a locking pin (302), wherein the driving component (301) can drive the locking pin (302) to slide in holes provided in the moving bracket (1) and the fixed bracket, and when the driving component (301) drives the locking pin (302) to simultaneously penetrate the moving bracket (1) and the fixed seat (2), the moving bracket (1) is locked relative to the fixed seat (2) and cannot tilt or swing left or right; when the driving component (301) drives the locking pin (302) to penetrate only one of the moving bracket (1) and the fixed seat (2), or when the locking pin (302) is completely separated from the moving bracket (1) and the fixed seat (2), the moving bracket (1) tilts or swings left or right relative to the fixed seat (2).

2. A locking mechanism for the left-right swing of the chassis according to claim 1, characterized in that: Side wings (101) are symmetrically extended from the left and right sides of the front of the motion bracket (1), and the side wings (101) include wing plates (102) with vertically bent edges. Side ears (201) are symmetrically extended from the left and right sides of the front of the fixing seat (2), and the side ears (201) include ear plates (202) with vertically bent edges. The wing plates (102) and the ear plates (202) are staggered up and down at some positions, and the staggered parts are provided with guide holes (103) and locking holes (203), and the guide holes (103 ) is arranged on the wing plate (102), and the locking hole (203) is arranged on the ear plate (202); the locking pin (302) is inserted into the guide hole (103), and the locking pin (302) is moved under the control of the driving component (301); when the locking pin (302) is inserted into the guide hole (103) and the locking hole (203) at the same time, the motion bracket (1) is in a locked state; when the locking pin (302) leaves the locking hole (203) and is only inserted into the guide hole (103), the motion bracket (1) is unlocked.

3. A locking mechanism for the left-right swing of the chassis according to claim 2, characterized in that: The ear plate (202) comprises a support ear (204) perpendicular to the left and right side walls of the fixing seat (2), the support ear (204) continues to extend upward to form a lug (205), the lug (205) and the adjacent wing plate (102) are staggered up and down, and the lug (205) is located on the outside of the adjacent wing plate (102), and the locking hole (203) is provided on the lug (205).

4. A locking mechanism for the left-right swing of the chassis according to claim 2, characterized in that: The driving assembly (301) comprises a locking bracket (3011) fixed on the front wall of the motion bracket (1), and a wire control (3012), wherein the wire control (3012) comprises an outer sleeve (30121) and a pull wire (30122) that moves telescopically in the outer sleeve (30121), the outer sleeve (30121) being mounted on the locking bracket (3011), and the pull wire (30122) is exposed from the outer sleeve (30121) to connect the outer sleeve (30121) to the outer sleeve (30121). A pull wire head (30123) is provided, and a compression spring (3013) is provided between the pull wire head (30123) and the locking bracket (3011). The compression spring (3013) is arranged along the direction in which the pull wire (30122) extends. A torsion spring (3014) is symmetrically provided on the left and right sides of the pull wire head (30123). A ferrule in the middle of the torsion spring (3014) is mounted on a fastening screw (3015) connected to the upper part of the moving bracket (1) so that the torsion spring (3014) is completely locked. The body rotates around the fastening screw (3015), the torsion spring (3014) has an elastic arm 1 (30141) and an elastic arm 2 (30142) respectively arranged on both sides of the fastening screw (3015), the pull wire head (30123) directly or indirectly acts on the elastic arm 1 (30141), and the elastic arm 2 (30142) is bent and passes through the movable hole (3016) reserved on the wing plate (102) and then connected to the locking pin (302); the pull wire (301 22) When moving in the shortening direction, the pull wire head (30123) drives the elastic arm 1 (30141) to rotate, and at the same time, the compression spring (3013) is compressed to generate a restoring elastic force, and the locking pin (302) moves synchronously to insert into or leave the locking hole (203). When the pull wire (30122) is released, that is, moves in the lengthening direction, the compression spring (3013) releases the elastic force to help the pull wire head (30123) and the torsion spring (3014) and the locking pin (302) to reset.

5. A locking mechanism for the left-right swing of the chassis according to claim 4, characterized in that: The pull-wire head (30123) directly acts on the elastic arm one (30141), which means that a ring (30143) is formed at the end of the elastic arm one (30141), the ring (30143) is inserted into the pull wire (30122), and the ring (30143) abuts against the pull-wire head (30123).

6. A locking mechanism for the left-right swing of the chassis according to claim 4, characterized in that: The indirect action of the pull-wire head (30123) on the elastic arm one (30141) means that: the driving component (301) further includes a dial plate (4), the dial plate (4) includes an L-shaped shifting portion (401) and an abutting portion (402), and the intersection of the shifting portion (401) and the abutting portion (402) is hinged on the upper surface of the motion bracket (1); the end of the elastic arm one (30141) is bent and inserted into the shifting portion (401), and the pull-wire head (30123) abuts against the abutting portion (402).

7. A locking mechanism for the left-right swing of the chassis according to claim 6, characterized in that: The end of the abutting portion (402) extends downward to form an abutting block (4021), the wire pull head (30123) abuts against the left side of the abutting block (4021), and the compression spring (3013) abuts against the right side of the abutting block (4021). The wire pull (30122) and the wire pull head (30123) drive the shifting plate (4) to rotate, so that the shifting portion (401) drives the elastic arm 1 (30141) to rotate, and then the elastic arm 2 (30142) drives the locking pin (302) to move.

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