CN218877369U - Device capable of realizing continuous circulation reversing - Google Patents

Abstract

The utility model discloses a device that can realize continuous cycle switching-over belongs to shallow technical field, uses inconvenient scheduling problem design for solving current device. The utility model discloses a device that can realize continuous cycle switching-over includes: a support; the seat base is connected to the bracket; the seat base is provided with a push rod forward limiting piece driving piece and a push rod reverse limiting piece driving piece; the push rod can rotate around the push rod connecting pin after unlocking a locking structure arranged between the push rod and the seat; after the reversing limiting part driving boss is separated from the push rod forward limiting part driving part and the push rod reverse limiting part driving part, the rotation angle of the push rod relative to the seat is limited. The utility model discloses a device that can realize continuous cycle switching-over uses more conveniently, labour saving and time saving, and the locking between seat and the support can be relieved to the hand push rod of user, need not to remove unlocking device specially, uses to experience well.

Description

Device capable of realizing continuous circulation reversing

Technical Field

The utility model relates to a shallow technical field especially relates to device that can realize continuous cycle switching-over.

Background

Various devices, including strollers, sometimes require the seat assembly to be turned around to facilitate transport of items or to facilitate child-parent interaction.

In the conventional device, the seat assembly and the support are connected through a pin shaft, and the seat assembly is pushed around the axis direction of the pin shaft, so that the seat assembly can be steered. The device also needs a locking structure, and the seat assembly and the bracket are fixed together by the locking structure after the seat assembly turns, so that the device can be conveniently pushed or moved.

The drawbacks of the above structure mainly include: the operation is inconvenient, needs manual unblock before rotatory seat subassembly, needs manual locking seat subassembly and support after the seat subassembly is rotatory to finish, and user experience is poor.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a device that can realize continuous cycle switching-over, it is more convenient to use.

To achieve the purpose, the utility model adopts the following technical proposal:

a device capable of achieving continuous cyclic commutation, comprising: the bracket is provided with a reversing limit piece driving boss; the seat base is rotatably connected to the bracket through a bracket connecting pin; the seat base is provided with a push rod forward limiting piece driving piece and a push rod reverse limiting piece driving piece, and the reversing limiting piece driving boss can respectively stir the push rod forward limiting piece driving piece and the push rod reverse limiting piece driving piece in the process that the seat base rotates around the axis of the pin; the push rod is rotatably connected to the seat base through a push rod connecting pin; after a locking structure arranged between the push rod and the seat base is unlocked, the push rod can rotate around the push rod connecting pin; after the reversing limiting part driving boss is separated from the push rod forward limiting part driving part and the push rod reverse limiting part driving part, the rotation angle of the push rod relative to the seat base is limited.

In a preferred embodiment, the push rod forward limiter driving part and the push rod reverse limiter driving part are symmetrically arranged around the bracket connecting pin.

In a preferred embodiment, a seat rotation locking groove is formed in the bracket, a seat rotation locking pin and a seat rotation locking pin return compression spring are arranged on the seat, and the seat rotation locking pin return compression spring is configured to drive the seat rotation locking pin to be inserted into the seat rotation locking groove so as to lock the seat and the bracket.

In a preferred embodiment, the seat base is further provided with a seat base rotary lock pin driving member and a seat base rotary lock pin traction cable, and the seat base rotary lock pin traction cable is connected between the seat base rotary lock pin driving member and the seat base rotary lock pin.

In a preferred embodiment, the seat base rotary lock pin driving member is hinged to the seat base through a rotating shaft, and when the seat base rotary lock pin driving member rotates around the rotating shaft, the seat base rotary lock pin can be pulled out of the seat base rotary lock groove through the seat base rotary lock pin traction cable.

In one preferred embodiment, the seat base is further provided with a push rod forward limiting member and a push rod reverse limiting member for limiting the rotation angle of the push rod, the push rod forward limiting member driving member is connected to the push rod forward limiting member through a push rod forward limiting member traction cable, and the push rod reverse limiting member driving member is connected to the push rod reverse limiting member through a push rod reverse limiting member traction cable.

In a preferred embodiment, a push rod positive limiting piece return pressure spring is arranged on the push rod positive limiting piece, and the push rod positive limiting piece return pressure spring is configured to push the push rod positive limiting piece to stop the push rod from rotating; the reverse locating part return pressure spring of push rod is provided with on the reverse locating part of push rod, the reverse locating part return pressure spring of push rod is configured to can promote the reverse locating part of push rod stops the push rod is rotatory.

In one preferred embodiment, a lower push rod joint is arranged on the push rod, a lower push rod joint boss is arranged on the lower push rod joint, and the push rod can be prevented from rotating when the forward limiting part of the push rod and/or the reverse limiting part of the push rod abut against the lower push rod joint boss.

In a preferred embodiment, two sides of the lower joint boss of the push rod are respectively provided with a limiting concave part.

In a preferred embodiment, the device capable of realizing continuous cycle reversal further comprises a seat assembly fixedly connected to the seat.

The utility model discloses a device that can realize continuous cycle switching-over utilizes switching-over locating part drive boss to stir the push rod forward locating part driving piece or the reverse locating part driving piece of push rod and can unblock the push rod, and the push rod can be rotatory around the push rod connecting pin, so the hand push rod of user can relieve the locking between seat and the support, need not to go to specially remove unlocking device, and it is more convenient to use, labour saving and time saving, and use is experienced.

Drawings

Fig. 1 is a schematic structural diagram of a device capable of realizing continuous cycle reversing according to an embodiment of the present invention in a normal use state;

fig. 2 is a schematic structural diagram of a device capable of realizing continuous cycle reversing according to an embodiment of the present invention in a state of preparing for reversing;

fig. 3 is a schematic structural diagram of a device capable of realizing continuous cycle reversing according to an embodiment of the present invention when a seat assembly is in a rotating state;

fig. 4 is a schematic structural diagram of a device capable of achieving continuous cyclic reversing according to an embodiment of the present invention in a state that the seat assembly is completely rotated;

fig. 5 is a schematic structural diagram of a device capable of realizing continuous cycle reversing according to an embodiment of the present invention in a reversing completion state;

FIG. 6 is a partial schematic view of a support, seat and push rod assembly according to an embodiment of the present invention;

fig. 7 is a second partial schematic view of the combined structure of the bracket, the seat and the push rod according to the embodiment of the present invention;

fig. 8 is a schematic structural view of a lower joint of a push rod according to an embodiment of the present invention;

fig. 9 is a schematic structural view of the lower joint of the push rod according to the embodiment of the present invention respectively cooperating with the forward limiting member and the backward limiting member of the push rod;

fig. 10 is one of the schematic views of the locking structure between the bracket and the seat base according to the embodiment of the present invention;

fig. 11 is a second schematic view of a locking structure between the bracket and the seat according to the embodiment of the present invention;

FIG. 12 is a schematic view of the structure of the lower joint of the push rod with the seat rotated and the pin driven member removed according to the embodiment of the present invention;

FIG. 13 is a schematic view of a structure of a lower joint of the push rod after the seat is mounted to rotate the pin driver according to an embodiment of the present invention;

FIG. 14 is a schematic structural view of a lower end of a push rod abutting against a rotary lock pin driving member of a mounting seat according to an embodiment of the present invention;

fig. 15 is a schematic structural view of the seat and the push rod according to the embodiment of the present invention when they are locked together.

In the figure:

1. a support; 2. a seat base; 3. a push rod; 4. a seat assembly; 5. a front wheel support; 6. a bracket connecting pin; 7. the push rod is connected with a pin; 11. the reversing limiting part drives the boss; 12. the seat rotation locking groove; 21. a push rod forward limiting part; 22. the push rod is a reverse limiting part; 24. the push rod returns the pressure spring to the positive limiting piece; 25. the push rod returns the pressure spring to the reverse limiting piece; 26. a rotating shaft; 27. a seat base rotating latch driver; 31. a lower joint of the push rod; 32. a lower joint boss of the push rod; 33. a limiting concave part; 231. the push rod is a positive limit part driving piece; 232. a push rod reverse limiting part driving part; 233. the push rod positively pulls the rope to the limiting part; 234. the push rod reversely pulls the rope through the limiting piece; 281. a seat base rotation locking pin; 282. the seat rotates the locking pin to return the pressure spring; 283. the seat base rotates the locking pin traction cable.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

The device capable of realizing continuous cyclic reversing disclosed by the embodiment comprises a support 1, a seat 2, a push rod 3, a seat component 4 and a front wheel support 5, wherein the support 1 provided with rear wheels is rotatably connected with the front wheel support 5, the push rod 3 is rotatably connected on the seat 2 through a push rod connecting pin 7, and the seat component 4 is fixedly connected on the seat 2, as shown in fig. 1 to 5. The term "seat assembly" is a broad concept and may refer to a seat on a moving device on which a person sits, such as a stroller, or a structure such as a basket on which goods or commodities are placed on a vehicle for transporting the goods or commodities.

As shown in fig. 6 to 15, the bracket 1 is provided with a reversing position-limiting member driving boss 11, and the seat base 2 is provided with a push rod forward position-limiting member driving member 231 and a push rod reverse position-limiting member driving member 232. The seat base 2 is rotatably connected to the bracket 1 through the bracket connecting pin 6, and the reversing limit piece driving boss 11 can respectively stir the push rod forward limit piece driving piece 231 and the push rod reverse limit piece driving piece 232 in the rotating process of the seat base 2 around the axis of the pin 6. The specific shapes of the reversing limiting part driving boss 11, the push rod forward limiting part driving part 231 and the push rod reverse limiting part driving part 232 are not limited, in this embodiment, the side surface of the reversing limiting part driving boss 11 is arc-shaped, the push rod forward limiting part driving part 231 and the push rod reverse limiting part driving part 232 are respectively sheet structures with protruding blocks arranged at the bottoms, and when the seat base 2 rotates around the axis of the pin 6, the push rod forward limiting part driving part 231 and the push rod reverse limiting part driving part 232 can be driven to synchronously rotate. When the driving member 231 of the push rod positive-direction limiter or the driving member 232 of the push rod reverse-direction limiter rotates to the driving boss 11 of the reversing limiter, the arc-shaped side surface can abut against the bottom protrusion, and the protrusion continues to rotate, and the protrusion can move along the curve of the arc-shaped side surface, so that the driving member 231 of the push rod positive-direction limiter and the driving member 232 of the push rod reverse-direction limiter are shifted.

It should be noted that the words "forward" and "reverse" in the whole text merely distinguish two components arranged in pairs, and the words "forward" and "reverse" are not technical solutions per se, and are not limitations on the structure. The forward direction and the reverse direction only represent that the component is used in the forward operation or the reverse operation at a certain moment, and because the seat base 2 can rotate relative to the bracket 1, the forward direction and the reverse direction may be exchanged, but the structure, the connection relation and the working principle of the component are not affected, and a person skilled in the art can make a correct judgment on the meaning of the forward direction and the reverse direction according to the specific use condition.

After the push rod forward limiting piece driving piece 231 and the push rod reverse limiting piece driving piece 232 are stirred and other locking structures arranged between the push rod 3 and the seat base 2 are unlocked, the push rod 3 can rotate around the push rod connecting pin 7; after the reversing position-limiting member driving boss 11 is separated from the push rod forward position-limiting member driving member 231 and the push rod reverse position-limiting member driving member 232, the rotation angle of the push rod 3 relative to the seat base 2 is limited.

The device utilizes the reverse locating part drive boss 11 to stir the push rod forward locating part driving piece 231 or the push rod reverse locating part driving piece 232 to unlock the push rod 3, the push rod 3 can rotate around the push rod connecting pin 7, conditions are provided for the push rod 3 to trigger other locking structures on the device, namely, the locking between the seat base 2 and the support 1 can be removed by the user holding the push rod 3, the unlocking device does not need to be moved specially, the use is more convenient, time and labor are saved, and the use experience is good.

The specific unlocking mode of the push rod 3 is not limited, in this embodiment, the seat base 2 is further provided with a seat base rotating lock pin driving piece 27, the seat base rotating lock pin driving piece 27 is hinged to the seat base 2 through a rotating shaft 26, and the push rod 3 can push the seat base rotating lock pin driving piece 27 to rotate around the rotating shaft 26 when rotating to a set angle.

The seat 2 is provided with a seat rotation locking pin 281 and a seat rotation locking pin return pressure spring 282, and the seat rotation locking pin 281 is connected to the seat rotation locking pin driving member 27 through a seat rotation locking pin pulling cable 283. When the push rod 3 pushes the seat rotation lock pin driver 27 to rotate around the rotation shaft 26, the seat rotation lock pin driver 27 can pull the seat rotation lock pin 281 through the seat rotation lock pin pull cable 283.

A seat base rotation locking groove 12 is provided on the bracket 1. When the seat rotary lock pin driver 27 is not pushed by the push rod 3, the seat rotary lock pin returning pressure spring 282 can drive the seat rotary lock pin 281 to be inserted into the seat rotary lock groove 12 to lock the seat 2 and the bracket 1. When the push rod 3 drives the seat rotation striker driver 27 to rotate about the rotary shaft 26, the seat rotation striker driver 27 pulls the seat rotation locking pin draw-in wire 283 rearward, and the seat rotation locking pin 281 connected to the seat rotation locking pin draw-in wire 283 is pulled out of the seat rotation locking groove 12, thereby unlocking the seat 2 and the stand 1.

Through the structure, a user can complete the pushing of the device to walk and the releasing of the locking structure between the seat 2 and the bracket 1 by holding the push rod 3 by hand, the use is more convenient, the user does not need to specially break the locking part between the seat 2 and the bracket 1, and the time and the labor are saved.

In order to avoid that the push rod 3 mistakenly drives the seat base rotating lock pin driving piece 27 to rotate around the rotating shaft 26 in normal use, the seat base 2 is further provided with a push rod forward limiting piece 21 and a push rod reverse limiting piece 22 for limiting the rotating angle of the push rod 3. The push rod 3 can rotate forward (forward) by a certain angle, and after being blocked by the push rod forward limiting part 21, the push rod 3 cannot rotate forward continuously; similarly, when there is no other structure to block, the push rod 3 can rotate backward (reversely) by a certain angle, and the push rod 3 cannot rotate backward after being blocked by the push rod reverse limiting member 22. When the push rod 3 is clamped between the push rod forward limiting member 21 and the push rod reverse limiting member 22, the push rod 3 cannot rotate, i.e., the push rod 3 and the seat base 2 are locked.

The push rod forward limiting member driving member 231 is connected to the push rod forward limiting member 21 through a push rod forward limiting member pulling cable 233, and when the reversing limiting member driving boss 11 pulls the push rod forward limiting member driving member 231 and moves a distance, the push rod forward limiting member driving member 231 pulls the push rod forward limiting member 21 through the push rod forward limiting member pulling cable 233, so that the push rod forward limiting member 21 is retracted to a position where the push rod 3 cannot be prevented from rotating forward (forward).

The push rod reverse stopper driving member 232 is connected to the push rod reverse stopper 22 through a push rod reverse stopper pulling cable 234, and when the reverse stopper driving boss 11 pulls the push rod reverse stopper driving member 232 and moves a distance, the push rod reverse stopper driving member 232 pulls the push rod reverse stopper 22 through the push rod reverse stopper pulling cable 234, so that the push rod reverse stopper 22 retreats to a position where the push rod 3 cannot be stopped from rotating backwards (reversely).

On the basis of the structure, the push rod forward limiting piece 21 is provided with a push rod forward limiting piece return pressure spring 24, and when the push rod forward limiting piece driving piece 231 is not shifted by the reversing limiting piece driving boss 11, the push rod forward limiting piece return pressure spring 24 can push the push rod forward limiting piece 21 to extend forwards, so that the push rod 3 is prevented from rotating. The reverse limit piece of push rod return pressure spring 25 is arranged on the reverse limit piece of push rod 22, and when the reverse limit piece of push rod driving piece 232 is not shifted by the reversing limit piece driving boss 11, the reverse limit piece of push rod return pressure spring 25 can push the reverse limit piece of push rod 22 to extend forward, thereby preventing the push rod 3 from rotating.

The specific method for preventing the rotation of the push rod 3 by the push rod forward-direction limiting member 21 and the push rod reverse-direction limiting member 22 is not limited, in this embodiment, the bottom end of the push rod 3 is provided with a push rod lower joint 31, the push rod lower joint 31 is provided with a push rod lower joint boss 32, and the push rod forward-direction limiting member 21 and/or the push rod reverse-direction limiting member 22 can prevent the rotation of the push rod 3 when abutting against the push rod lower joint boss 32. Simple and reasonable structure, convenient use and low processing cost.

As shown in fig. 8 and 9, two sides of the lower joint boss 32 of the push rod are respectively provided with a limiting recess 33, and the push rod forward limiting member 21 and the push rod reverse limiting member 22 can be respectively clamped in the two limiting recesses 33 when extending out, so as to limit the rotation of the push rod 3. When the push rod forward limiting piece 21 and the push rod reverse limiting piece 22 are pulled backwards by the respectively connected limiting piece pulling cables, the push rod forward limiting piece 21 and the push rod reverse limiting piece 22 exit the limiting concave part 33, and the push rod 3 can rotate.

On the basis of the above structure, the push rod forward limiting part driving piece 231 and the push rod reverse limiting part driving piece 232 are symmetrically arranged about the bracket connecting pin 6, that is, each seat base 2 rotates 180 degrees around the bracket connecting pin 6 (the seat assembly 4 rotates from the forward direction to the reverse direction or from the reverse direction to the forward direction), one of the push rod forward limiting part driving piece 231 and the push rod reverse limiting part driving piece 232 will meet the reversing limiting part driving boss 11, and the continuous cycle of the reversing action is realized.

It should be noted that, the seat base rotation locking groove 12, the push rod forward direction limiting member 21, the push rod reverse direction limiting member 22, the push rod forward direction limiting member return pressure spring 24, the push rod reverse direction limiting member return pressure spring 25, the rotating shaft 26, the seat base rotation lock pin driving member 27, the push rod forward direction limiting member traction cable 233, the push rod reverse direction limiting member traction cable 234, the seat base rotation locking pin 281, the seat base rotation locking pin return pressure spring 282, and the seat base rotation locking pin traction cable 283 are provided.

However, in order to have a more stable structure and more convenient use, the push rod 3 is usually designed into an inverted U shape, the seat base 2 is designed into a strip shape, two ends of the push rod 3 are respectively connected to two ends of the seat base 2 through the push rod connecting pin 7 in a rotating manner, and accordingly, the locking structure and the unlocking structure are respectively arranged into two groups.

That is, two push rod forward direction limiting piece pulling cables 233 are connected to the push rod forward direction limiting piece driving piece 231, the two push rod forward direction limiting piece pulling cables 233 are respectively connected to the two push rod forward direction limiting pieces 21 located at the left and right ends of the push rod 3, and the two push rod forward direction limiting pieces 21 are respectively adapted to the push rod lower joint bosses 32 at the left and right ends of the push rod 3. Similarly, two push rod reverse limiting part pulling cables 234 are connected to the push rod reverse limiting part driving part 232, the two push rod reverse limiting part pulling cables 234 are respectively connected to two push rod reverse limiting parts 22 located at the left end and the right end of the push rod 3, and the two push rod reverse limiting parts 22 are respectively adapted to the push rod lower joint bosses 32 at the left end and the right end of the push rod 3.

Seat base rotary locking grooves 12 are respectively arranged at the left and right ends of the bracket 1, seat base rotary lock pin driving parts 27 are respectively arranged at the left and right ends of the seat base 2, the two seat-base rotary locking pin driving members 27 are connected to the two seat-base rotary locking pins 281 through two seat-base rotary locking pin pulling cables 283, and the two seat-base rotary locking pins 281 correspond to the two seat-base rotary locking grooves 12 respectively, so as to lock the support 1 and the seat base 2.

The working principle of the device is as follows: fig. 1 shows the device in normal use, fig. 2 shows the ready-to-reverse state (upright push rod 3), fig. 3 shows the seat assembly 4 in a rotated state, fig. 4 shows the seat assembly 4 in a rotated state, and fig. 5 shows the reverse-completed state (return of push rod 3).

In the process of transition from the state shown in fig. 1 to the state shown in fig. 2, as shown in fig. 6, 7, 9, and 12, the push rod 3 rotates forward (in the direction toward the front wheel carrier 5), and the push rod lower joint 31 rotates the push rod lower joint boss 32 counterclockwise. At this time, the push rod forward limiting part driving part 231 contacts with the reversing limiting part driving boss 11, the push rod forward limiting part driving part 231 moves transversely under the pushing of the arc-shaped surface of the reversing limiting part driving boss 11, the push rod forward limiting part 21 connected with the push rod forward limiting part driving part 231 through the push rod forward limiting part traction cable 233 is pulled backwards, a distance is formed between the push rod forward limiting part 21 and the push rod lower joint 31, and a movable space is reserved for the push rod lower joint boss 32. At this time, the push rod reverse limiting member driving member 232 does not contact with the reversing limiting member driving boss 11, the push rod reverse limiting member 22 keeps a forward extending state under the action of the push rod reverse limiting member return compression spring 25, and the push rod reverse limiting member 22 can block the push rod lower joint boss 32.

To show the internal structure more clearly, the seat rotary latch driver 27 is removed in fig. 12, and fig. 13 is a view of fig. 12 with the seat rotary latch driver 27 installed. The push rod 3 rotates forward, the push rod lower joint 31 drives the push rod lower joint boss 32 to rotate counterclockwise, the push rod forward limiting part 21 retreats, and the space where the push rod lower joint boss 32 can retreat from the push rod forward limiting part 21 is skipped over.

Fig. 14 shows that the lower joint boss 32 of the push rod slightly retreats from the forward limit member 21 of the push rod and then abuts against the seat rotating latch driving member 27, as shown in fig. 10, 11 and 14, a protruding structure is disposed at the top of the seat rotating latch driving member 27, and after the lower joint boss 32 of the push rod abuts against the protruding structure, a thrust is applied to the seat rotating latch driving member 27, so that the seat rotating latch driving member 27 rotates counterclockwise around the rotating shaft 26. When the seat rotation lock pin driving member 27 rotates, the seat rotation lock pin pulling cable 283 is pulled, the seat rotation lock pin 281 connected with the seat rotation lock pin pulling cable 283 is pulled out from the seat rotation lock slot 12, the support 1 and the seat 2 are unlocked, and the seat 2 can drive the seat assembly 4 to rotate around the support connection pin 6 synchronously by transversely twisting the push rod 3.

At this time, the driving member 231 of the forward limit stopper of the push rod is separated from the driving boss 11 of the reversing limit stopper, the traction cable 233 of the forward limit stopper of the push rod no longer pulls the forward limit stopper 21 of the push rod backwards, the forward limit stopper 21 of the push rod extends forwards under the action of the return compression spring 24 of the forward limit stopper of the push rod, as shown in fig. 15, the forward limit stopper 21 of the push rod and the reverse limit stopper 22 of the push rod respectively abut against the boss 32 of the lower joint of the push rod from both sides, so that the push rod 3 is kept fixed relative to the seat base 2.

As shown in fig. 3, the user can apply a force to the push rod 3, and the force is transmitted to the seat 2, so that the seat 2 drives the seat assembly 4 to rotate around the bracket connecting pin 6. Until the seat 2 is rotated as shown in fig. 4, the seat assembly 4 completes one turn. At this time, the push rod reverse limiting part driving part 232 is in contact with the reversing limiting part driving boss 11, the push rod reverse limiting part driving part 232 moves transversely under the pushing of the arc-shaped surface of the reversing limiting part driving boss 11, the push rod reverse limiting part 22 connected with the push rod reverse limiting part driving part 232 through the push rod reverse limiting part traction cable 234 is pulled backwards, a distance is formed between the push rod reverse limiting part 22 and the push rod lower joint 31, and a moving space is reserved for the push rod lower joint boss 32.

Compared with the state shown in fig. 1, at this time, the seat base 2 rotates 180 °, the push rod forward limiting member 21 and the push rod reverse limiting member 22 are reversed with respect to the front-back direction of the push rod lower joint boss 32, the push rod reverse limiting member 22 retreats, a space is left for the push rod lower joint boss 32 to rotate clockwise, and the push rod 3 can rotate backward (toward the bracket 1) as shown in fig. 5. At this time, the lower joint boss 32 of the push rod is separated from the seat rotary lock pin driving member 27, the seat rotary lock pin 281 extends out under the action of the seat rotary lock pin return pressure spring 282, and the seat rotary lock pin 281 is reinserted into the seat rotary lock groove 12 to realize the locking between the bracket 1 and the seat 2, so that the device can normally advance or retreat when the user pushes the push rod 3, and the seat 2 cannot drive the seat assembly 4 to rotate relative to the bracket connecting pin 6.

Note that the above description is only for the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (10)

1. Device that can realize continuous circulation switching-over, its characterized in that includes:

the bracket (1) is provided with a reversing limit piece driving boss (11);

the seat base (2) is rotationally connected to the bracket (1) through a bracket connecting pin (6); a push rod forward limiting part driving piece (231) and a push rod reverse limiting part driving piece (232) are arranged on the seat base (2), and in the process that the seat base (2) rotates around the axis of the pin (6), the reversing limiting part driving boss (11) can respectively shift the push rod forward limiting part driving piece (231) and the push rod reverse limiting part driving piece (232); and the number of the first and second groups,

the push rod (3) is rotatably connected to the seat base (2) through a push rod connecting pin (7); after a locking structure arranged between the push rod (3) and the seat base (2) is unlocked, the push rod (3) can rotate around the push rod connecting pin (7); after the reversing limiting part driving boss (11) is separated from the push rod forward limiting part driving part (231) and the push rod reverse limiting part driving part (232), the rotation angle of the push rod (3) relative to the seat base (2) is limited.

2. Device according to claim 1, characterized in that the push rod positive stop drive (231) and the push rod negative stop drive (232) are arranged symmetrically with respect to the bracket connection pin (6).

3. A device enabling continuous cyclic commutation according to claim 1, wherein a seat rotation locking groove (12) is provided on the support (1), and wherein a seat rotation locking pin (281) and a seat rotation locking pin return compression spring (282) are provided on the seat (2), the seat rotation locking pin return compression spring (282) being configured to drive the seat rotation locking pin (281) to be inserted into the seat rotation locking groove (12) to lock the seat (2) and the support (1).

4. Device for realizing a continuous cycle reversal according to claim 3, characterized in that the seat (2) is further provided with a seat rotary latch driver (27) and a seat rotary latch pull cable (283), the seat rotary latch pull cable (283) being connected between the seat rotary latch driver (27) and the seat rotary latch (281).

5. The device for realizing continuous cycle reversal according to claim 4, characterized in that the seat rotary latch driver (27) is hinged to the seat (2) by a rotating shaft (26), and the seat rotary latch driver (27) can pull the seat rotary latch (281) out of the seat rotary latch slot (12) by the seat rotary latch pull-in cable (283) when rotating around the rotating shaft (26).

6. The device capable of achieving continuous circular reversing according to any one of claims 1 to 5, wherein a push rod forward limiting member (21) and a push rod backward limiting member (22) for limiting the rotation angle of the push rod (3) are further arranged on the seat base (2), the push rod forward limiting member driving member (231) is connected to the push rod forward limiting member (21) through a push rod forward limiting member traction cable (233), and the push rod backward limiting member driving member (232) is connected to the push rod backward limiting member (22) through a push rod backward limiting member traction cable (234).

7. The device capable of achieving continuous cycle reversal according to claim 6, characterized in that a push rod positive limiting member return pressure spring (24) is disposed on the push rod positive limiting member (21), and the push rod positive limiting member return pressure spring (24) is configured to push the push rod positive limiting member (21) to stop the rotation of the push rod (3); the push rod reverse limiting part (22) is provided with a push rod reverse limiting part return pressure spring (25), and the push rod reverse limiting part return pressure spring (25) is configured to be capable of pushing the push rod reverse limiting part (22) to stop the rotation of the push rod (3).

8. The device capable of realizing continuous cycle reversal according to claim 6, characterized in that the push rod (3) is provided with a push rod lower joint (31), the push rod lower joint (31) is provided with a push rod lower joint boss (32), and the push rod forward limiting member (21) and/or the push rod reverse limiting member (22) can prevent the push rod (3) from rotating when abutting on the push rod lower joint boss (32).

9. The device capable of realizing continuous cycle reversal according to claim 8, characterized in that two sides of the lower joint boss (32) of the push rod are respectively provided with a limiting concave part (33).

10. A device capable of achieving continuous cycle reversal according to any one of claims 1 to 5, characterized in that the device capable of achieving continuous cycle reversal further comprises a seat assembly (4), the seat assembly (4) being fixedly connected to the seat base (2).

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