CN108016479A - Large joint self-locking and automatic lock rear foot mechanism - Google Patents

Abstract

The invention discloses a large joint self-locking and rear foot locking mechanism, which belongs to the technical field of baby carriages. The large joint self-locking and automatic locking rear foot mechanism includes a car lock block, the upper part of the large joint, the large joint hook, the rear foot limit iron plate, the rear foot plug plastic, the rear foot lock torsion spring mechanism, and the lower part of the large joint; the large joint The upper part is connected with the lower part of the large joint through the first hinge; the large joint hook is fixedly connected with the upper part of the large joint; the car receiving lock block is movable and fastened with the groove on the large joint hook; the rear foot limit iron plate It is fixedly connected with the rear foot plug plastic; the rear foot limit iron plate is connected with the lower part of the large joint through the third hinge. The large joint self-locking and automatic locking rear foot mechanism of the present invention realizes the simple locking and unlocking of the large joint self-locking and automatic locking rear foot structure through the cooperation of the rear foot lock torsion spring mechanism, the car receiving lock block and the rear foot lock return spring, and at the same time The structure is simple and the manufacturing cost is low.

Description

Large joint self-locking and automatic locking rear foot mechanism

technical field

The invention belongs to the technical field of baby carriages, in particular to a large joint self-locking and rear foot locking mechanism.

Background technique

The structure of the large joint self-locking and the automatic locking rear foot structure of the current baby stroller is all complicated, the cost is high and the use is inconvenient. The Chinese invention patent with the authorized notification number CN203753214U disclosed the "skeleton joint of trolley" on August 6, 2014. Its technical solution is: the invention discloses a skeleton joint of trolley, which includes a shell seat fixedly connected to a rear foot of the trolley The upper end of the rod is lockably pivoted to a front foot rod and a handle rod in the shell seat, and a locking mechanism is provided on the upper end of the rear foot rod to lock the front foot rod and the handle rod. The present invention allows the handle bar to rotate the first angle, and then drives the front foot bar to rotate the second angle, so that the handle bar can drive the front foot bar, so that the two can finally approach the rear foot bar at the same time, making the trolley a small size Therefore, the present invention can use a simple and reliable mechanism to solve the problem that the angle of the handle bar should be pivoted to the rear leg bar is larger than the front leg bar when it is folded, which not only simplifies the assembly work, but also improves the durability of the trolley product . The skeleton joint structure of this handcart is complex, and the manufacturing cost is high.

Contents of the invention

The object of the present invention is to overcome the shortcomings and deficiencies in the above-mentioned prior art, and provide a large joint self-locking and automatic locking rear foot mechanism.

The purpose of the present invention is achieved through the following technical solutions: a large joint self-locking and automatic rear foot locking mechanism, including a car lock block, a large joint upper part, a large joint hook, a rear foot limit iron piece, a rear foot plug plastic, and a rear foot lock twist The spring mechanism and the lower part of the large joint; the upper part of the large joint and the lower part of the large joint are connected by the first hinge; the hook of the large joint is fixedly connected with the lower part of the large joint; the groove on the locking block of the large joint is movable Buckle connection; the rear foot limit iron piece is fixedly connected with the rear foot plug plastic; the rear foot limit iron piece is connected with the lower part of the large joint through the third hinge; the foot lock torsion spring mechanism includes the rear foot lock spring block A, the first Two hinges, the rear foot lock bullet B and the torsion spring, the rear foot lock bullet A is connected with the rear foot lock bullet B through the second hinge; the two ends of the torsion spring are respectively connected to the rear foot lock bullet A and the rear foot lock bullet B is connected; the upper part of the large joint is offset against the rear foot lock spring block A; the rear foot lock elastic block B is connected with the rear foot lock return spring; the rear foot lock return spring is arranged in the lower part of the large joint.

The elastic force of the rear foot lock return spring is smaller than the torsion force of the torsion spring.

The rear foot lock spring block B is fixedly connected with the rear foot lock shaft, and the rear foot lock shaft is arranged in the slot of the rear foot limit iron sheet; Different positions in the card slot realize the locked and unlocked state of the rear foot.

The large joint hook is fixedly connected to the lower part of the large joint through the first large joint hook fixing shaft and the second large joint hook fixing shaft.

The vehicle retraction lock block is connected with the lead wire, the vehicle retraction lock block is offset against one end of the vehicle retraction return spring, and the other end of the vehicle retraction return spring is offset against the plug in the joint.

The intra-articular plug is connected to the upper part of the large joint through an intra-articular plug fixation shaft.

The rear foot limiting iron sheet is fixedly connected with the rear foot plug plastic through a fixing piece.

The inner side of the lower part of the large joint is provided with a seat frame fixing seat.

In normal use, the return spring for retracting the car is offset against the locking block for retracting the car; the locking block for retracting the car and the large joint hook are interlocked and locked tightly, and the large joint hook passes through the first large joint hook to fix the shaft and the second large joint hook to fix the shaft It is fixed at the lower part of the large joint, so that the upper part of the large joint and the lower part of the large joint cannot rotate through the first hinge. At the same time, the upper part of the large joint squeezes the rear foot lock spring block A, and the second hinge is fixed on the lower part of the large joint. The rear foot lock spring block A transmits the counterclockwise torque to the torsion spring through the second hinge, and the torsion spring then transmits the torque to the rear foot lock spring. Block B, the rear foot lock spring block B is squeezed by the counterclockwise torque to the rear foot lock return spring, because the spring force of the rear foot lock return spring is smaller than the torsion spring torque, so the rear foot lock spring block A and the rear foot lock spring block B are in the position of the torsion spring In the open state, the return spring of the rear foot lock is squeezed and deformed to shorten, the rear foot shaft of the lock passes through the rear foot limit iron plate slot, and the two ends pass through the rear foot lock spring block B, and can be rotated by the foot lock spring block B to be in different positions. position, so that the rear foot limit iron piece cannot be rotated through the third hinge, and at the same time, the rear foot plug plastic and the foot limit iron piece are fixed with fixing parts to lock the rear foot.

In the process of folding and closing the car, under the pulling force of the pull wire in the straight combination of the handlebar, the closing lock block slides upward and disengages from the hook of the large joint, so that the upper part of the large joint and the lower part of the large joint can be wound around the first The hinge rotates, and at the same time, the force that the upper part of the large joint squeezes the rear foot lock spring block A disappears, and the rear foot lock spring block B, under the elastic force of the rear foot lock return spring, makes the rear foot lock spring block B, the torsion spring, the rear foot lock spring block A, and the lock The rear foot shaft rotates clockwise at the same time, the rear foot is automatically unlocked, and the rear foot limit iron plate can rotate clockwise around the third hinge. When the platform is lifted, the rear foot rotates around the third hinge under the force of its own weight.

When unfolding a folded stroller, there are two situations:

The first case: first unfold the rear foot limit iron plate connected to the rear foot, and then unfold the upper part of the large joint connected by the handlebar, and push it backward during the folding and closing process mentioned above;

The second situation: first unfold the handle to drive the upper part of the large joint, then unfold the rear foot to drive the limit iron plate of the rear foot: the upper part of the large joint rotates clockwise around the first hinge, and the inclined surface of the lock block is squeezed back by the large joint hook , when it is in place, the retractable lock block is pinned into the hook groove of the large joint under the elastic force of the retractable spring to lock it tightly. Rotate, because the rear foot limit iron piece is not unfolded in place, the rear foot lock shaft is restricted by the card slot, so that the rear foot lock spring block B cannot rotate around the hinge. At this time, the torsion spring is deformed by torsion. The lock spring block B drives the rear foot shaft of the lock to rotate counterclockwise around the hinge under the force of the torsion spring, and the rear foot limit iron plate is locked by the rear foot shaft of the lock to limit the rotation around the third hinge, realizing the function of automatically locking the rear foot.

Compared with the prior art, the present invention has the following advantages and effects:

The large joint self-locking and automatic locking rear foot mechanism of the present invention realizes the simple locking and unlocking of the large joint self-locking and automatic locking rear foot structure through the cooperation of the rear foot lock torsion spring mechanism, the car receiving lock block and the rear foot lock return spring, and at the same time The structure is simple and the manufacturing cost is low.

Description of drawings

Fig. 1 is a schematic diagram of the exploded structure of the large joint self-locking and automatic locking rear foot mechanism of the present invention;

Fig. 2 is a schematic side view of the normal use state of the large joint self-locking and automatic locking rear foot mechanism of the present invention;

Fig. 3 is a schematic diagram of the cross-sectional structure of Fig. 2A-A;

Fig. 4 is a schematic diagram of the cross-sectional structure of Fig. 2B-B;

Fig. 5 is a schematic diagram of the sectional structure of Fig. 2C-C;

Fig. 6 is a schematic diagram of the side structure of the handle folding process of the large joint self-locking and automatic locking rear foot mechanism of the present invention;

Fig. 7 is a schematic diagram of the cross-sectional structure of Fig. 6A-A;

Fig. 8 is a schematic diagram of the cross-sectional structure of Fig. 6B-B;

Fig. 9 is a schematic cross-sectional structure diagram of Fig. 6C-C;

Fig. 10 is a side view of the rear foot folding process of the large joint self-locking and automatic locking rear foot mechanism of the present invention;

Fig. 11 is a schematic diagram of the cross-sectional structure of Fig. 10A-A;

Fig. 12 is a schematic diagram of the cross-sectional structure of Fig. 10B-B;

Fig. 13 is a schematic diagram of the cross-sectional structure of Fig. 10C-C;

Fig. 14 is a schematic diagram of the side structure of the fully folded state of the large joint self-locking and automatic locking rear foot mechanism of the present invention;

Fig. 15 is a schematic diagram of the cross-sectional structure of Fig. 14A-A;

Fig. 16 is a schematic diagram of the cross-sectional structure of Fig. 14B-B;

Fig. 17 is a schematic cross-sectional structure diagram of Fig. 14C-C;

Fig. 18 is a schematic diagram of the side structure of the large joint self-locking and automatic locking rear foot mechanism of the present invention, first unfolding the handle and then unfolding the rear foot;

Fig. 19 is a schematic cross-sectional structure diagram of Fig. 18A-A;

Fig. 20 is a schematic diagram of the cross-sectional structure of Fig. 18B-B;

Fig. 21 is a schematic cross-sectional structure diagram of Fig. 18C-C.

Detailed ways

The present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.

Example 1

As shown in Figure 1, the present invention provides a large joint self-locking and automatic rear foot locking mechanism, including a car lock block 4, a large joint upper part 5, a large joint hook 6, a rear foot limit iron plate 7, and a rear foot plug plastic 8 , rear foot lock torsion spring mechanism, large joint lower part 18; the large joint upper part 5 is connected with the large joint lower part 18 through the first hinge 11; the large joint hook 6 is fixedly connected with the large joint lower part 18; the car receiving lock block 4 and the groove on the large joint hook 6 can be snapped and connected; the rear foot limit iron piece 7 is fixedly connected with the rear foot plug plastic 8; the rear foot limit iron piece 7 is connected to the lower part of the large joint 18 through the third hinge 13 Connection; the foot lock torsion spring mechanism includes the rear foot lock spring block A10, the second hinge 17, the rear foot lock spring block B15 and the torsion spring 20, and the rear foot lock spring block A10 is connected with the rear foot lock spring block B15 through the second hinge 17 The two ends of the torsion spring 20 are respectively connected to the rear foot lock elastic block A10 and the rear foot lock elastic block B15; the upper part of the large joint 5 is offset with the rear foot lock elastic block A10; the rear foot lock elastic block B15 is locked back to the rear foot The springs 16 are connected against each other; the rear foot lock return spring 16 is arranged in the lower part 18 of the big joint.

The rear foot lock spring block B15 is fixedly connected with the rear foot lock shaft 14, and the rear foot shaft 14 is arranged in the draw-in groove of the rear foot limit iron plate 7; Different positions in the draw-in groove of bit iron sheet 7 realize the locked and unlocked state of the rear foot.

The large joint hook 6 is fixedly connected with the large joint lower part 18 through the first large joint hook fixing shaft 9 and the second large joint hook fixing shaft 19 .

The car retraction lock block 4 is connected with the lead wire 31 , the car retraction lock block 4 is in contact with one end of the car retraction return spring 3 , and the other end of the car retraction return spring 3 is in contact with the plug 2 in the joint.

The intra-articular plug 2 is connected to the upper part of the large joint 5 through the intra-articular plug fixing shaft 1 .

The rear foot limiting iron sheet 7 is fixedly connected with the rear foot plug plastic 8 through a fixing piece 25 .

The inner side of the lower part 18 of the large joint is provided with a seat frame fixing seat 12 .

As shown in Fig. 2-Fig. 5, in the normal use state, the retracting spring 3 is offset against the retracting lock block 4; the retracting lock block 4 and the large joint hook 6 are interlocked and locked, and the large joint hook 6 passes through the first The large joint hook fixing shaft 9 and the second large joint hook fixing shaft 19 are fixed on the large joint lower part 18, so that the first hinge 11 cannot rotate between the large joint upper part 5 and the large joint lower part 18. As shown in Figure 3, at the same time, the upper part of the large joint 5 squeezes the rear foot lock spring block A10, the second hinge 17 is fixed on the lower part 18 of the large joint, and the rear foot lock spring block A10 transmits the counterclockwise torque to the torsion spring 20 through the second hinge 17 , the torsion spring 20 then transmits the torque to the rear foot lock spring block B15, and the rear foot lock spring block B15 is subjected to counterclockwise torque and squeezes the rear foot lock return spring 16. The torsion spring 20 makes the rear foot lock elastic block A10 and the rear foot lock elastic block B15 in an open state, and the rear foot lock return spring 16 is shortened by extrusion deformation (as shown in Figure 4), and the rear foot shaft 14 passes through the rear foot limit iron The two ends pass through the rear foot lock spring block B15, and can then rotate the foot lock spring block B15 to be in different positions. The position under normal use is shown in Figure 5, so that the rear foot limit iron plate 7 cannot pass through the second The three hinges 13 rotate, and the rear foot plug plastic 8 and the pin limit iron plate 7 are fixed with the fixture 25, which plays the role of locking the rear foot.

As shown in Figures 6-9, in the process of folding and closing the car, under the pulling force of the pull wire 31 in the straight combination of the handle, the closing lock block 4 slides upwards and disengages from the large joint hook 6, thereby making the large joint The joint upper part 5 and the large joint lower part 18 can rotate around the first hinge 11, as shown in Figure 7; at the same time, the power of the large joint upper part 5 to squeeze the rear foot lock spring block A10 disappears, and the rear foot lock spring block B15 locks back to its position on the rear foot Under the elastic force of the spring 16, the rear foot lock spring block B15, the torsion spring 20, the rear foot lock spring block A10, and the rear foot shaft 14 rotate clockwise at the same time, as shown in Figure 8; the rear foot shaft 14 is in position as shown in Figure 9 , the rear foot is automatically unlocked, and the rear foot limit iron plate 7 can rotate clockwise around the third hinge 13. When the platform is lifted, the rear foot rotates around the third hinge 13 under the force of its own weight. The process is shown in Figures 10-13 The final folded state is shown in Figure 14-Figure 17.

When unfolding a folded stroller, there are two situations:

The first situation: first unfold the rear foot limit iron plate 7 connected to the rear foot, and then unfold the upper part 5 of the large joint connected to the handlebar, and push back in the process of folding and closing the car as described above;

In the second case, as shown in Figures 18-21, first unfold the handle to drive the upper part 5 of the large joint, and then unfold the rear foot to drive the limit iron plate 7 of the rear foot: the upper part 5 of the large joint rotates clockwise around the first hinge 11, retracts The slope of the car lock block 4 is squeezed back by the large joint hook 6, and when it is in place, the car lock block 4 is pinned into the hook groove of the large joint hook 6 under the elastic force of the car retraction return spring 3 and locked tightly (as shown in Figure 19 shown), at the same time, the upper part 5 of the large joint squeezes the rear foot lock spring block A10, and the rear foot lock spring block A10 rotates counterclockwise around the hinge (as shown in Figure 20). The draw-in slot is limited (as shown in Figure 21), so that the rear foot lock bullet B15 cannot rotate around the hinge (as shown in Figure 20), at this time, the torsion spring 20 is deformed by torsion, and when the rear foot limiting iron sheet 7 is fully expanded, the rear foot The lock spring block B15 drives the lock rear foot shaft 14 to rotate counterclockwise around the hinge under the force of the torsion spring 20, and the rear foot limit iron sheet 7 is locked by the lock rear foot shaft 14 to limit rotation around the third hinge 13, realizing the automatic locking rear foot function.

The above-mentioned embodiment is a preferred embodiment of the present invention, but the embodiment of the present invention is not limited by the above-mentioned embodiment, and any other changes, modifications, substitutions, combinations, Simplifications should be equivalent replacement methods, and all are included in the protection scope of the present invention.

Claims (8)

1. a kind of large joint self-locking and automatic lock rear foot mechanism, it is characterised in that：Including the closing piece that returns the vehicle to the garage and knock off, large joint top, high point Save hook, the spacing iron plate of the rear foot, rear foot plug plastic cement, rear foot lock torsion spring mechanism, large joint lower part；The large joint top and large joint Lower part is connected by first axle；The large joint hook is fixedly connected with large joint lower part；Closing piece and the large joint hook of returning the vehicle to the garage and knock off On groove movable be fastened and connected；The spacing iron plate of the rear foot is fixedly connected with rear foot plug plastic cement；The spacing iron plate of the rear foot It is connected by third hinge with large joint lower part；The foot lock torsion spring mechanism includes rear foot lock bullet block A, second hinge, rear foot lock Bullet block B and torsional spring, the rear foot lock bullet block A lock bullet block B with the rear foot by second hinge and are connected；The both ends of the torsional spring respectively at The rear foot is locked bullet block A and is connected with rear foot lock bullet block B；The large joint top offsets with rear foot lock bullet block A；The rear foot lock bullet block B Offset and be connected with rear foot lock return spring；The rear foot lock return spring is arranged in large joint lower part.

2. large joint self-locking according to claim 1 and automatic lock rear foot mechanism, it is characterised in that：The rear foot locks return Spring force is less than torsional spring torsion.

3. large joint self-locking according to claim 1 and automatic lock rear foot mechanism, it is characterised in that：The rear foot locks bullet block B is fixedly connected with lock rear foot axis, and the lock rear foot axis is arranged in the card slot of the spacing iron plate of the rear foot；Lock rear foot axis and lock bullet with the rear foot The movement of block B and in the card slot of the spacing iron plate of the rear foot diverse location, realize locking and the released state of the rear foot.

4. large joint self-locking according to claim 1 and automatic lock rear foot mechanism, it is characterised in that：The large joint hook leads to Cross the first large joint hook fixing axle and second largest joint hook fixing axle is fixedly connected with large joint lower part.

5. large joint self-locking according to claim 1 and automatic lock rear foot mechanism, it is characterised in that：It is described return the vehicle to the garage and knock off closing piece with Lead connects, and the closing piece that returns the vehicle to the garage and knock off offsets with return spring one end of returning the vehicle to the garage and knock off, the return spring other end and the intra-articular plug of returning the vehicle to the garage and knock off Son offsets.

6. large joint self-locking according to claim 5 and automatic lock rear foot mechanism, it is characterised in that：The intra-articular plug It is connected to by intra-articular plug fixing axle in large joint top.

7. large joint self-locking according to claim 1 and automatic lock rear foot mechanism, it is characterised in that：The rear foot limiting iron Piece is fixedly connected by fixing piece with rear foot plug plastic cement.

8. large joint self-locking according to claim 1 and automatic lock rear foot mechanism, it is characterised in that：The large joint lower part Inner side is provided with mounting fixed seat.