CN104290621A - Seat snap mechanism - Google Patents

Abstract

The invention discloses a seat clamping mechanism in the technical field of infant appliances, which comprises a seat body and a base, wherein the seat body is detachably arranged on the base, at least one group of swing arms with clamping hooks are pivoted on the base, the base is connected with an operating part, the operating part is connected with the swing arms, the lower end of the seat body is provided with a pair of clamping rods for the clamping hooks to be clamped and limited, the base is pivoted with at least one safety release piece capable of limiting the swing arms, when the safety release piece limits the swing arms, the clamping hooks are in a release state, the clamping rods can be separated from the clamping hooks, when the safety release piece is separated from the limit setting of the swing arms, the clamping hooks are used for clamping and limiting the clamping rods, and the phenomenon of false locking of the clamping mechanism can be effectively avoided through the safety release piece, and simultaneously, the fixing or separating operation of the seat body and the base is simple and convenient, and the structure is compact.

Description

Seat snap mechanism

technical field

The invention relates to the technical field of baby appliances, in particular to a seat engaging mechanism.

Background technique

A baby car seat is a riding device specially designed for children to safely ride in a car. It adjusts the seat to cooperate with the car seat belt to provide a safe and comfortable riding environment for children. A child safety seat generally includes a seat body, a base and a supporting device. The base is fixed on the car seat, the seat body is connected and fixed to the base through a connecting device, and the supporting device is supported on the supporting surface (usually in the car) by supporting feet. The bottom surface in front of the rear seat), the supporting feet can prevent the child safety seat from moving in the direction of the car, so that the child safety seat can be fixed more stably, so as to ensure the safety of the child when the car is running.

Most of the existing connection devices between the baby seat and the base have defects such as complex structure, inconvenient disassembly and placement, and low firmness of placement, and false locking is prone to occur, which has certain potential safety hazards.

Contents of the invention

The object of the present invention is to provide a seat engaging mechanism which can effectively avoid the false lock state, has a simple structure, is convenient to operate, and has a firm fit.

To achieve the above object, the technical solution of the present invention is to provide a seat engaging mechanism, which includes a seat body and a base, the seat body is detachably mounted on the base, and at least one seat is pivotally connected to the base. A swing arm with a snap hook is set, an operating piece is connected to the base, the operating piece is connected to the swing arm, and a pair of clips for the snap hook to engage and limit are provided at the lower end of the body. The base is pivotally connected with at least one safety release piece that can limit the swing arm. When the safety release piece sets the limit position for the swing arm, the engaging hook is in the In the unlocked state, the clamping rod can be disengaged from the engaging hook, and when the safety release part disengages from the limit setting of the swing arm, the engaging hook can engage and limit the clamping rod .

Preferably, the swing arm includes a front swing arm and a rear swing arm, the middle parts of the front swing arm and the rear swing arm are pivotally connected to the base, and the operating member is connected to the The lower end of the front swing arm is connected, and the lower end of the front swing arm is connected to the lower end of the rear swing arm through a driving mechanism.

Preferably, the upper end of the front swing arm is provided with a forward-bending front engaging hook, and the upper end of the rear swing arm is provided with a backward-bending rear engaging hook, and the driving mechanism includes a first driving member, A transmission shaft and a second driving member, the middle part of the transmission shaft is pivotally connected to the base, the two ends of the first driving member are respectively pivotally connected to the lower end of the front swing arm and the upper end of the transmission shaft, and the Two ends of the second driving member are respectively pivotally connected to the lower end of the rear swing arm and the lower end of the transmission shaft.

Preferably, a first elastic member is provided between the front swing arm and the base, one end of the first elastic member is connected to the base, and the other end of the first elastic member is connected to the lower end of the front swing arm.

Preferably, the first elastic member is a tension spring.

Preferably, the upper ends of the front swing arm and the rear swing arm are provided with backward-curved engaging hooks, the drive mechanism is a rod-shaped structure, and the two ends of the drive mechanism are connected to the front swing arm respectively. The lower end of the arm and the lower end of the rear swing arm are pivotally connected.

Preferably, the connecting rod is provided with an engaging state indicating area, and the base is provided with an indicating window for displaying the engaging state indicating area.

Preferably, there are two groups of swing arms, and the two groups of swing arms are symmetrically located on both sides of the base.

Preferably, the swing arm is provided with a positioning protrusion, and the safety release part is provided with a limit part that can be connected with the positioning protrusion. When the limit is set, the limit portion abuts against the positioning protrusion so that the engaging hook is in an unlocked state.

Preferably, the safety release part is provided with a protrusion for pushing the lever, and when the lever pushes the protrusion, the safety release part disengages from the swing arm. The limit setting of the locking hook is used to engage and limit the clamping rod.

Preferably, a second elastic member is connected between the safety release member and the base so that the safety release member has a constant tendency to limit movement of the swing arm.

Preferably, the second elastic member is a torsion spring.

Preferably, the operating member is connected to the swing arm through a safety release member, and a lock bar protrudes from the safety release member, and the lock bar is connected to the swing arm through a third elastic member.

Preferably, the swing arm is provided with an engaging slot for engaging the locking bar.

Preferably, the base is provided with a limit block that touches the swing arm.

Preferably, the third elastic member is a tension spring.

Preferably, the swing arm includes a front swing arm and a rear swing arm, and there are two groups of the swing arm, the two front swing arms are symmetrically located on both sides of the front end of the base, and the two rear swing arms Symmetrically located on both sides of the rear end of the base, the two safety release parts respectively connected to the two front swing arms are connected and fixed through the first linkage rod, and the two safety release parts respectively connected to the two rear swing arms The parts are connected and fixed through the second linkage rod, and the first linkage rod and the second linkage rod are respectively pivotally connected to the base.

Preferably, the operating member is connected to the safety release member through a first traction member.

Preferably, the swing arm includes a front swing arm and a rear swing arm, the lower ends of the front swing arm and the rear swing arm are pivotally connected to the base, and the locking bar is connected to the The front swing arm is connected, and the middle part of the rear swing arm is connected with the operating member through the second traction member.

Preferably, there are two groups of swing arms, and the two front swing arms are symmetrically located on both sides of the front end of the base, and the two safety release parts respectively connected to the two front swing arms pass through the first linkage rod. The connection is fixed, the first linkage rod is pivotally connected to the base, and the two rear swing arms are located symmetrically on both sides of the rear end of the base and are connected and fixed by the third linkage rod.

Preferably, a fourth elastic member is connected between the third linkage rod and the base.

Preferably, the fourth elastic member is a tension spring.

Preferably, the base is further provided with a limiting groove for the engaging hook to be seated and the locking rod to be inserted.

Compared with the prior art, the present invention includes a seat body and a base, the seat body is detachably mounted on the base, and at least one set of swing arms with engaging hooks are pivotally connected to the base, the An operating piece is connected to the base, and the operating piece is connected to the swing arm. A pair of locking levers for engaging and limiting the engaging hooks are provided at the lower end of the body. At least one safety release part for limiting the swing arm, when the safety release part sets the limit for the swing arm, the engaging hook is in the release state, and the locking lever can be disengaged from the The above-mentioned engaging hook, when the safety release lock is disengaged from the limit setting of the swing arm, the engagement hook will engage and limit the clamping rod, and the safety release lock can be effectively avoided. False locking phenomenon occurs in the engaging mechanism, and at the same time, the fixing or separating operation of the seat body and the base is simple and convenient, and the structure is compact.

Description of drawings

Fig. 1 is a structural schematic diagram of the seat body of the present invention.

Fig. 2 is a schematic diagram of the structure of the base in a locked state according to the present invention.

Fig. 3 is a schematic structural diagram of the unlocked state of the base of the present invention.

Fig. 4 is a schematic diagram of the internal structure of the base in a locked state of the present invention.

Fig. 5 is a schematic diagram of the internal structure of the base in the unlocked state of the present invention.

Fig. 6 is a schematic structural diagram of the second embodiment of the present invention.

Fig. 7 is a schematic structural diagram of a base in a locked state according to a third embodiment of the present invention.

Fig. 8 is a schematic structural diagram of the unlocked state of the base according to the third embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and preferred embodiments.

Please refer to Figures 1 to 5, which are the first embodiment of the present invention, a seat engaging mechanism, which is used on a child's car seat, and includes a seat body 1 and a base 2, and the seat body 1 is detachable. The device is installed on the base 2, on which at least one set of swing arms 3 with engaging hooks 30 are pivotally connected, on the base 2 is rotatably connected with an operating member 5, and the operating member 5 is connected to the swing arm The arm 3 is connected, and the lower end of the body 1 is provided with a pair of clamping rods 11 that can be engaged and limited by the engaging hook 30. The base 2 is pivoted with at least one lever that can limit the position of the swing arm 3 A safety release part 4, when the safety release part 4 is set to limit the swing arm 3, as shown in Figure 5, the engaging hook 30 is in the release state, and the locking lever 11 can Disengage from the engaging hook 30; when the safety release member 4 disengages from the limit setting of the swing arm 3, the engaging hook 30 engages and limits the locking lever 11 as shown in FIG. bit. The safety release member 4 can effectively avoid the false locking phenomenon of the engaging mechanism, and at the same time, the fixing or separating operation of the seat body 1 and the base 2 is simple and convenient, and the structure is compact. Preferably, the base 2 is further provided with a limiting groove 20 for the engaging hook 30 to be seated and for the clamping rod 11 to extend into. The base 2 includes an upper cover 2a and a lower cover 2b that are fastened and fixed to each other. The upper cover 2a is provided with an opening 2a1 for the operating member 5 to pass through. When the upper cover 2a and the lower cover 2b When buckled, the operating member 5 is exposed outside the upper cover 2a.

In this embodiment, there are two groups of swing arms 3 , and the two groups of swing arms 3 are symmetrically located on both sides of the base 2 . Only one group of swing arms 3 is described below:

Preferably, as shown in Figures 4 and 5, the swing arm 3 includes a front swing arm 31 and a rear swing arm 32, and the middle parts of the front swing arm 31 and the rear swing arm 32 are pivotally connected to the On the base 2, the operating member 5 is connected to the lower end of the front swing arm 31 through a connecting rod 6, and the lower end of the front swing arm 31 and the lower end of the rear swing arm 32 are linked by a drive mechanism 7 connect. Specifically, the upper end of the front swing arm 31 is provided with a front engaging hook 30a bent forward, and the upper end of the rear swing arm 32 is provided with a rear engaging hook 30b bent backward. A driver 71, a transmission shaft 72 and a second driver 73, the middle part of the transmission shaft 72 is pivotally connected to the base 2, and the two ends of the first driver 71 are respectively connected to the lower end of the front swing arm 31, The upper end of the transmission shaft 72 is pivotally connected, and the two ends of the second driving member 73 are respectively pivotally connected to the lower end of the rear swing arm 32 and the lower end of the transmission shaft 72 .

Preferably, a first elastic member 81 is provided between the front swing arm 31 and the base 2, one end of the first elastic member 81 is connected to the base 2, and the other end is connected to the front swing arm 31, through the first elastic member 81, the front engaging hook 30a of the front swing arm 31 has a constant movement tendency towards the limiting groove 20 to engage the locking rod 11, and due to the driving With the linkage of the mechanism 7 , the rear engaging hook 30 b of the rear swing arm 32 also has a constant movement tendency towards the limiting groove 20 . In this embodiment, the first elastic member 81 is a tension spring.

Preferably, the connecting rod 6 is provided with an engaging state indicating area 60, and the base 2 is provided with an indicating window 2a2 for displaying the engaging state indicating area 60, specifically, the indicating window 2a2 is located at the On the upper cover 2a of the base 2. The engaging state indicating area 60 includes an unlocking indicating area 61 showing that the engaging mechanism is in an unlocked state and a locking indicating area 62 showing that the engaging mechanism is engaged in place. At the same time, the unlocking indicating area 61 and the The lock indication area 62 is a color indication area of different colors, and the user can visually identify and distinguish according to different colors, and the identification is simple and convenient. In this embodiment, the unlock indication area 61 is a red indication area, and the lock indication area 62 It is a green indicator area, and users can quickly identify it according to the two common color warning signs.

Preferably, in this embodiment, the base 2 is provided with the safety release member 4 that cooperates with each of the swing arms 3, specifically, the swing arm 3 is provided with a positioning protrusion 3a, The safety release part 4 is provided with a limit part 4a that can be connected with the positioning protrusion 3a. When the safety release part 4 sets the position limit for the swing arm 3, the limit part 4a abuts against the positioning protrusion 3a so that the engaging hook 30 is in an unlocked state. The safety release part 4 is protrudingly provided with a convex part 4b for the pushing of the lever 11. When the lever 11 pushes the convex part 4b, the safety release part 4 is disengaged from the The limit setting of the swing arm 3, the engaging hook 30 engages and limits the locking rod 11, and at the same time, the positioning protrusion 3a abuts against the upper edge of the safety release member 4 to ensure that the engaging hook 30 is locked. Specifically, a second elastic member 82 is connected between the safety release member 4 and the base 2 . In this embodiment, the second elastic member 82 is a torsion spring, and the safety release member 4 has a tendency to limit the movement of the swing arm 3 by using the second elastic member 82 .

The working principle of this embodiment is described in detail below:

When it is necessary to operate the engaging mechanism in the engaging state to the unlocking state, as shown by the rotating arrow in FIG. 4 , the operating member 5 is operated, and the operating member 5 drives the connecting rod 6 to overcome the The elastic action of the first elastic member 81 moves, the connecting rod 6 drives the front swing arm 31 to pivot, and at the same time, the first driving member 71 connected to the front swing arm 31 drives the transmission shaft 72 Pivoting, the transmission shaft 72 drives the second driving member 73 to move, and the rear swing arm 32 pivots under the drive of the second driving member 73. At this time, a pair of seats on the seat body 1 The locking lever 11 can be respectively disengaged from the front engaging hook 30a of the front swing arm 31 and the rear engaging hook 30b of the rear swing arm 32, and at the same time, under the action of the second elastic member 82, the safety release member 4 is pivoted until the limiting part 4a abuts against the positioning projection 3a of the swing arm 3, at this time the swing arm 3 is always in the unlocked state limited by the safety release member 4, and the base 2 The unlocking indication area 61 is displayed on the indication window 2a2, as shown in Figure 3;

When the seat body 1 needs to be engaged on the base 2, it is only necessary to place the clamping lever 11 of the seat body 1 on the corresponding limit groove 20, and place the seat body 1 Press down, at this time, the lever 11 pushes the convex part 4b of the safety release member 4, overcomes the effect of the second elastic member 82, and the safety release member 4 pivots so that the limit part 4a breaks away from the positioning protrusion 3a, the swing arm 3 breaks away from the restriction of the safety release member 4, under the elastic action of the first elastic member 81, the front swing arm 31 pivots, and at the same time , the first driving member 71 connected to the front swing arm 31 drives the transmission shaft 72 to pivot, the transmission shaft 72 drives the second driving member 73 to move, and the rear swing arm 32 Driven by the second driver 73 to pivot, at this time, the front engaging hook 30a of the front swing arm 31 and the rear engaging hook 30b of the rear swing arm 32 carry out a pair of locking levers 11 on the seat body 1 respectively. Engage limit, at this time, the positioning protrusion 3a abuts against the upper edge of the safety release member 4 to ensure that the engaging hook 30 is in a locked state, and at this time the seat body 1 is firmly engaged on the base 2, the pivoting of the front swing arm 31 causes the connecting rod 6 to move synchronously, and the locking indicator area 62 on the connecting rod 6 will be displayed on the indicating window 2a2 of the base 2, as shown in FIG. 2 display, which is convenient for users to distinguish.

In summary, the present invention provides the safety release part 4 on the engaging mechanism, and the safety release part 4 can effectively avoid the false locking phenomenon of the engaging mechanism, and at the same time realize the seat body 1 and the seat body 1. The fixing or separating operation of the base 2 is simple and convenient, and the structure is compact.

As shown in Figure 6, it is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that in this embodiment, the drive mechanism 7 is only a single rod-shaped structure, and the drive mechanism 7 The two ends of the front swing arm 31 and the lower end of the rear swing arm 32 are pivotally connected respectively, and the upper ends of the front swing arm 31 and the rear swing arm 32 are all provided with backward bending snap hook 30, when the front swing arm 31 pivots, the front swing arm 31 drives the rear swing arm 32 to pivot synchronously through the drive mechanism 7 of the rod-shaped structure, so as to realize the clamping of the clamping lever 11 In addition, the operating direction of the operating member 5 is opposite to that of the first embodiment. Other structural components of this embodiment are the same as those of the first embodiment, and will not be repeated here.

It should be noted that, in the first embodiment of the present invention, the front engaging hook 30a is shown as being bent forward, and the rear engaging hook 30b is shown as being bent backward, while in the second embodiment, the The engaging hooks of the front swing arm 31 and the rear swing arm 32 are shown as being bent backwards, such setting is related to the drive mechanism 7, and those skilled in the art can clearly understand that in the first embodiment, the The front engaging hook 30a can be bent backward, at this time, the rear engaging hook 30b can be set to bend forward, and in the second embodiment, the front swing arm 31 and the rear swing arm 32 The engaging hooks can all be set to bend forward, and at this time, the operating direction of the operating member 5 is opposite to that shown in the original embodiment.

As shown in Figures 7 to 8, it is the third embodiment of the present invention. In this embodiment, the operating part 5 is connected with the swing arm 3 through a safety release part 4, and the safety release part 4 is raised A lock bar 4c is provided, and the lock bar 4c is connected to the swing arm 3 through a third elastic member 83 . The engaging hooks 30 of the swing arm 3 are all bent backward. In this embodiment, the third elastic member 83 is a tension spring. The operating member 5 drives the safety release member 4 to pivot, and the engaging hook 30 of the swing arm 3 is pivoted to the unlocked state driven by the third elastic member 83 . The base 2 is provided with a limit block 21 that touches the swing arm 3, and has a compact structure. Preferably, the swing arm 3 is provided with an engaging slot 3b for engaging the lock bar 4c. When the engaging hook 30 engages and limits the locking bar 11, the lock The rod 4c is engaged in the engaging groove 3b to prevent the engaging hook 30 from being unintentionally released. Preferably, the operating member 5 is connected to the safety release member 4 through the first pulling member 91 .

Preferably, in this embodiment, the swing arm 3 includes a front swing arm 31 and a rear swing arm 32, the lower ends of the front swing arm 31 and the rear swing arm 32 are pivotally connected to the base 2, The locking lever 4 c is connected to the front swing arm 31 through the third elastic member 83 , and the middle part of the rear swing arm 32 is connected to the operating member 5 through the second traction member 92 . In this embodiment, the swing arms 3 have two groups, the two front swing arms 31 are symmetrically located on both sides of the front end of the base 2, and the two safety release parts 4 connected to the two front swing arms 31 are respectively The first linkage rod 1a is connected and fixed, and the first linkage rod 1a is pivotally connected to the base 2. The first linkage rod 1a enables the two safety release parts 4 to pivot synchronously, that is, when When the operating member 5 operates one of the safety release members 4 to pivot through the first traction member 91 , the other safety release member 4 also pivots at the same time. The two rear swing arms 32 are located symmetrically on both sides of the rear end of the base 2 and are connected and fixed by the third linkage rod 1b. The third link 1b enables the two rear swing arms 32 to pivot synchronously. A fourth elastic member 84 is connected between the third link 1b and the base 2. In this embodiment, the fourth elastic The member 84 is a tension spring, and the fourth elastic member 84 makes the engaging hook 30 of the rear swing arm 32 have a constant movement tendency towards the limiting groove 20 . The working principle of the third embodiment is described in detail below:

When it is necessary to operate the engaging mechanism in the engaging state to the unlocking state, the operating member 5 is operated, and the operating member 5 operates the safety release member 4 through the first traction member 91 to overcome the The action of the third elastic member 83 pivots, the locking bar 4c is disengaged from the engaging groove 3b, and at the same time, driven by the third elastic member 83, the front swing arm 31 pivots to the front swing arm 31 Touch the limit block 21 of the base 2 to realize that the front swing arm 31 is kept in the unlocked state, and when the operating member 5 is operated, the operating member 5 passes through the second traction member 92 at the same time The rear swing arm 32 is driven to pivot against the elastic effect of the fourth elastic member 84 , so that the rear swing arm 32 unlocks the latch 11 . At this time, the pair of locking levers 11 on the seat body 1 can be disengaged from the engagement of the front swing arm 31 and the rear swing arm 32 respectively.

When the seat body 1 needs to be engaged on the base 2, it is only necessary to place the clamping rod 11 of the seat body 1 on the position corresponding to the base 2, and a pair of the clamping rods 11 are respectively Correspondingly overcome the effect of the third elastic member 83 to press the front swing arm 31 and overcome the effect of the fourth elastic member 84 to press the rear swing arm 32 and extend into the limiting groove 20, so The safety release member 4 is driven by the third elastic member 83 to pivot until the lock bar 4c engages in the engagement groove 3b, so as to prevent the front swing arm 31 from being released accidentally. At this time, the clamping rod 11 is firmly engaged in the limiting groove 20, and the whole operation process has a compact structure.

It should be pointed out that in other embodiments, the rear swing arm 32 in the third embodiment can also be set to the same structure as the front swing arm 31, which is the fourth embodiment of the present invention, that is, the swing arm 32 There are two groups of arms 3, the two front swing arms 31 are symmetrically located on both sides of the front end of the base 2, and the two rear swing arms 32 are symmetrically located on both sides of the rear end of the base 2, respectively connected to the two described bases. The two safety release parts 4 connected to the front swing arm 31 are connected and fixed through the first linkage rod 1a, and the two safety release parts 4 respectively connected to the two rear swing arms 32 are connected through the second linkage rod (not shown in the figure). ) is connected and fixed (that is, the connection structure of the second linkage is similar to that of the first linkage), and the first linkage 1a and the second linkage are pivotally connected to the base 2 respectively. Since its working principle is similar to that of the third embodiment, only the structure of the rear swing arm 32 is changed to the structure of the front swing arm 31 , which will not be repeated here.

What is disclosed above is only a preferred embodiment of the present invention, and of course it cannot limit the scope of rights of the present invention. Therefore, equivalent changes made according to the patent scope of the present invention still fall within the scope of the present invention.

Claims (23)

1. A seat engaging mechanism, comprising a seat body and a base, characterized in that: the seat body is detachably mounted on the base, and at least one set of engaging hooks is pivotally connected to the base. A swing arm, an operating piece is connected to the base, the operating piece is connected to the swing arm, a pair of clamping rods are provided at the lower end of the body for the clamping hook to engage and limit, and the base At least one safety release piece that can limit the swing arm is pivotally connected. When the safety release piece sets the limit position for the swing arm, the engaging hook is in the release state, and the The clamping rod can be disengaged from the engaging hook, and when the safety release part is disengaged from the limit setting of the swing arm, the engaging hook can engage and limit the clamping rod. 2. The seat engaging mechanism according to claim 1, wherein the swing arm comprises a front swing arm and a rear swing arm, and the middle part of the front swing arm and the rear swing arm are pivotally connected On the base, the operating member is connected to the lower end of the front swing arm through a connecting rod, and the lower end of the front swing arm is connected to the lower end of the rear swing arm through a drive mechanism. 3. The seat engaging mechanism according to claim 2, characterized in that: the upper end of the front swing arm is provided with a forward-bending front engaging hook, and the upper end of the rear swing arm is provided with a backward-bending hook. Rear engaging hook, the driving mechanism includes a first driving part, a transmission shaft and a second driving part, the middle part of the transmission shaft is pivotally connected to the base, and the two ends of the first driving part are respectively connected to the front swing The lower end of the arm is pivotally connected to the upper end of the transmission shaft, and the two ends of the second driving member are respectively pivotally connected to the lower end of the rear swing arm and the lower end of the transmission shaft. 4. The seat engaging mechanism according to claim 3, wherein a first elastic member is provided between the front swing arm and the base, one end of the first elastic member is connected to the base, The other end is connected to the lower end of the front swing arm. 5. The seat engaging mechanism according to claim 4, wherein the first elastic member is a tension spring. 6. The seat engaging mechanism according to claim 2, characterized in that: the upper ends of the front swing arm and the rear swing arm are provided with backward bending engaging hooks, and the driving mechanism is rod-shaped structure, the two ends of the drive mechanism are respectively pivotally connected to the lower end of the front swing arm and the lower end of the rear swing arm. 7 . The seat engagement mechanism according to claim 2 , wherein an indication area for an engagement state is provided on the connecting rod, and an indication window for displaying the indication area for the engagement state is opened on the base. 8 . 8 . The seat engaging mechanism according to claim 2 , wherein there are two groups of the swing arms, and the two groups of the swing arms are symmetrically located on both sides of the base. 9. The seat engaging mechanism according to claim 1, characterized in that: the swing arm is provided with a positioning protrusion, and the safety release part is provided with a limit position that can be connected with the positioning protrusion. part, when the safety release part sets a limit on the swing arm, the limit part abuts against the positioning protrusion so that the engaging hook is in an unlocked state. 10. The seat engaging mechanism according to claim 9, characterized in that: the safety release part is provided with a protrusion for pushing the lever, when the lever pushes the protrusion When it is in the upper position, the safety release part is disengaged from the limit setting of the swing arm, and the engaging hook engages and limits the locking rod. 11. The seat engaging mechanism according to claim 10, characterized in that: the safety release part is connected with the base so that the safety release part has a constant limit for the swing arm. Second elastic for sporty trends. 12. The seat engaging mechanism according to claim 11, wherein the second elastic member is a torsion spring. 13. The seat engaging mechanism according to claim 1, wherein the operating part is connected to the swing arm through a safety release part, and a locking lever protrudes from the safety release part, and the The lock bar is connected with the swing arm through the third elastic member. 14. The seat engaging mechanism according to claim 13, wherein an engaging groove for engaging the locking bar is provided on the swing arm. 15. The engaging mechanism of the seat according to claim 13, wherein a limiting block is provided on the base to touch the swing arm. 16. The seat engaging mechanism according to claim 13, wherein the third elastic member is a tension spring. 17. The seat engaging mechanism as claimed in claim 13, wherein said swing arm comprises a front swing arm and a rear swing arm, said swing arm has two groups, and the two front swing arms are symmetrical Located on both sides of the front end of the base, the two rear swing arms are symmetrically located on both sides of the rear end of the base, and the two safety release parts respectively connected to the two front swing arms are connected and fixed by the first linkage rod , the two safety release parts respectively connected to the two rear swing arms are connected and fixed through the second linkage rod, and the first linkage rod and the second linkage rod are respectively pivotally connected to the base. 18. The seat engaging mechanism according to claim 13, wherein the operating member is connected to the safety release member through a first traction member. 19. The seat engaging mechanism according to claim 13, wherein the swing arm comprises a front swing arm and a rear swing arm, the lower ends of the front swing arm and the rear swing arm are in contact with the The base is pivotally connected, the lock bar is connected to the front swing arm through a third elastic member, and the middle part of the rear swing arm is connected to the operating member through a second traction member. 20. The seat engaging mechanism according to claim 19, characterized in that: there are two groups of said swing arms, and the two front swing arms are symmetrically located on both sides of the front end of the base, respectively connected to the two front ends. The two safety release parts connected by the swing arms are connected and fixed through the first linkage rod, and the first linkage rod is pivotally connected to the base. The two rear swing arms are symmetrically located on both sides of the rear end of the base and pass through The third connecting rod is connected and fixed. 21. The seat engaging mechanism according to claim 20, wherein a fourth elastic member is connected between the third linkage rod and the base. 22. The seat engaging mechanism according to claim 21, wherein the fourth elastic member is a tension spring. 23. The engaging mechanism of the seat according to claim 1, characterized in that: the base is further provided with a limiting groove for seating the engaging hook and for extending the locking rod.