Folding unlocking mechanism

Abstract

The utility model discloses a folding unlocking mechanism which comprises a frame joint and a seat frame joint, the seat frame joint is detachably connected to the frame joint, a linkage extrusion block is machined on a rotating part of the seat frame joint, and the linkage extrusion block is provided with an extrusion inclined face. The frame joint comprises a rotating part and a fixed part, the rotating part and the fixed part are rotationally matched, penetrating holes for locking are formed in the positions, away from the center, of the rotating part and the fixed part, a shifting piece is arranged on the fixed part of the frame joint in a sliding fit mode, and the sliding direction of the shifting piece is parallel to the axial direction of the frame joint. A locking pin shaft penetrating through all the penetrating holes is fixedly connected to the position, facing the penetrating holes, of the shifting piece. According to the technical scheme, the purposes that the seat frame joint is detached from the frame joint, and the frame joint is simple in structure and easy to operate are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of child strollers, and in particular to a folding and unlocking mechanism for a child stroller frame. Background Art

[0002] CN2021233010989 discloses a linkage unlocking mechanism for folding a vehicle frame and a seat frame. The linkage unlocking mechanism comprises a seat frame joint and a vehicle frame joint. The locking block of the seat frame joint is squeezed, which in turn presses down the unlocking linkage block of the frame joint, thereby achieving linkage unlocking. This unlocking mechanism is complex, particularly the unlocking portion of the frame joint. Furthermore, the seat frame joint cannot be removed from the frame joint. Utility Model Content

[0003] In view of the deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a folding and unlocking mechanism with a reasonable structural design. The unlocking mechanism has a simple structure, the seat frame joint can be separated from the frame joint, and the frame can be folded and unlocked when the seat frame is removed.

[0004] In order to achieve the above purpose, the technical solution adopted by the present utility model is as follows:

[0005] A folding unlocking mechanism includes a vehicle frame joint and a seat frame joint, characterized in that the seat frame joint is detachably connected to the vehicle frame joint, and a linkage extrusion block having an extrusion slope is machined on the rotating portion of the seat frame joint; the frame joint includes a rotating portion and a fixed portion, wherein the rotating portion and the fixed portion rotate in conjunction with each other and both have locking holes at positions away from the center; a toggle piece is slidably engaged with the fixed portion of the frame joint, the toggle piece sliding in a direction parallel to the axis of the vehicle frame joint; a locking pin passing through all the holes is fixedly connected to the toggle piece and facing the holes; the coupling relationship between the linkage extrusion block and the toggle piece is such that during the rotation of the linkage extrusion block, the extrusion slope presses the linkage unlocking member in a direction away from the holes, thereby disengaging the locking pin from the holes and unlocking the vehicle frame joint. This technical solution achieves the purpose of detaching the seat frame joint from the frame joint, and the frame joint has a simple structure and is easy to operate.

[0006] Furthermore, the fixed part of the frame joint includes a rear wheel frame fixed arm, and the rotating part of the frame joint includes a push handle rotating arm and a front wheel frame rotating arm; wherein the rear wheel frame fixed arm includes a frame joint shell, a locking connecting block and the frame joint is fixedly connected between the locking connecting blocks; the push handle rotating arm and the front wheel frame rotating arm are located between the frame joint shell and the locking connecting block, and in the unlocked state, the push handle rotating arm and the front wheel frame rotating arm rotate relative to the rear wheel frame fixed arm; a linkage unlocking piece sliding guide groove is provided on the locking connecting block and close to the side of the connecting fastener, a toggle piece slides in the linkage unlocking piece sliding guide groove and a closing piece is fixedly connected to the end of the linkage unlocking piece sliding guide groove to prevent the toggle piece from completely disengaging from the linkage unlocking piece sliding guide groove.

[0007] Furthermore, an arcuate unlocking groove is provided on the locking connection block, below the sliding guide groove of the linkage unlocking member. A push-to-unlock block is positioned and slidably engaged within the arcuate unlocking groove. The bottom of the toggle plate is located outside the push-to-unlock block. A sloped surface is formed on the side where the push-to-unlock block and the toggle plate meet, and this slope slopes downward along the sliding direction of the push-to-unlock block. This technical solution allows for manual unlocking of the frame joint, especially after the seat joint is disengaged from the frame joint, by pressing the unlocking block to unlock the frame joint.

[0008] Furthermore, a pin mounting slot is provided on the push-to-unlock block, facing the arc-shaped unlocking side. A memory pin is connected to the pin mounting slot via a spring. The spring forces one end of the memory pin to extend from the pin mounting slot. Correspondingly, a memory pin hole is provided on the arc-shaped unlocking slot, below the locking pin. This technical solution implements a memory unlocking function for the manual push-to-unlock block, meaning that unlocking can be achieved with a single press, rather than requiring continuous pressure. This makes operation more convenient.

[0009] Furthermore, a memory unlocking groove is provided on the push handle's rotating arm, facing the arcuate unlocking groove. Its surrounding walls are inclined. A memory unlocking pin is connected to the memory pin hole via a spring. The spring forces the memory unlocking pin to reside partially in the memory unlocking groove and partially in the memory pin hole. This technical solution effectively releases the memory unlocking function. When the push handle's rotating arm is rotated, the memory unlocking groove's surrounding walls squeeze the memory unlocking pin, forcing the memory pin out of the memory pin hole, thereby releasing the memory function.

[0010] Furthermore, the seat frame joint includes a backrest frame rotating arm, an armrest frame rotating arm, a seat frame connecting arm, and a connecting fastener; a positioning hole is provided at the center of the inner side of the backrest frame rotating arm, and a driving inclined boss is provided on the circumference of the positioning hole, and an unlocking inclined groove is provided on the inner edge of the backrest frame rotating arm; a locking block for locking the armrest frame rotating arm is connected to the seat frame connecting arm through a spring, and during the rotation of the backrest frame rotating arm, the unlocking inclined groove presses down the locking block to disengage the locking block from the armrest frame rotating arm to unlock the armrest frame rotating arm; a first gear locking groove is provided on the seat frame connecting arm and on one side cooperating with the connecting fastener, and correspondingly, a second gear locking groove is provided on the connecting fastener and close to the seat connecting arm side, a guide shaft is connected to the center of the second gear locking groove, and the first gear locking groove or the second gear locking groove is connected to the second gear locking groove. A locking gear is limited in the groove, and a hole for the guide shaft to pass through is opened in the center of the locking gear, and a sleeve-shaped unlocking inclined surface is provided on the outer circumference of the hole. Correspondingly, a through hole for the guide shaft and the sleeve-shaped unlocking inclined surface to pass through is opened in the center of the seat frame connecting arm. After the sleeve-shaped unlocking inclined surface passes through the through hole, it adapts to the driving inclined surface boss; in the process of rotating the backrest frame rotating arm, the driving inclined surface boss forces the sleeve-shaped unlocking inclined surface to retreat until the locking gear is stuck in the second gear locking groove to realize the unlocking between the seat frame connecting arm and the connecting fastener. In the unlocked state, the seat frame connecting arm rotates relative to the connecting fastener; the guide shaft passes through the locking gear, the seat frame connecting arm, and the armrest frame rotating arm in sequence and then extends into the backrest frame rotating arm to realize the coaxial connection of the connecting fastener, the seat frame connecting arm, the armrest frame rotating arm and the backrest frame rotating arm.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] Compared with the existing technology, the frame joint structure of the utility model is simple and the operation is more convenient;

[0013] 1. The seat frame joint of the utility model can be disassembled from the frame joint, which is convenient for maintenance and use. In addition, the frame joint of the utility model can be manually unlocked after the seat frame joint is disassembled, which is more practical.

[0014] 2. The manual unlocking of the frame joint of this utility model has a memory function, which can avoid pressing the unlocking button all the time and is more convenient to use;

[0015] 3. The seat frame joint of the present invention can be rotated relative to the frame joint to achieve a greater degree of folding and collapsing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the present invention after being applied to a child stroller frame;

[0017] Figure 2 This is a schematic diagram of the folding and unlocking mechanism structure of the present utility model;

[0018] Figure 3 This is a schematic diagram of the joint structure of the seat frame of the present invention;

[0019] Figure 4 This is a schematic diagram of the inner structure of the seat frame joint shell of the present utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the locking ring, locking block, arc block, etc. of the utility model;

[0021] Figure 6 This is a structural diagram of the seat frame connecting arm of the utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the locking ring, locking gear, connecting fasteners, etc. of the utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the second gear locking groove on the connecting fastener of the present invention;

[0024] Figure 9 This is a schematic diagram of the frame joint structure of the utility model;

[0025] Figure 10 This is a schematic diagram of the positional relationship between the toggle piece and the push-to-unlock block and other structures of the present invention;

[0026] Figure 11 This is a schematic diagram of the structure of the linkage unlocking member of the present utility model;

[0027] Figure 12 This is a schematic diagram of the structure of the push-to-unlock block of the utility model;

[0028] Figure 13 This is a schematic diagram of the structural position relationship of the arc-shaped unlocking groove, memory pin hole, memory unlocking pin, etc. of the utility model;

[0029] Figure 14 This is a schematic diagram of the structural position relationship of the push handle rotating arm, memory unlocking slot, etc. of the utility model;

[0030] Among them: 1. Seat frame joint, 11. Backrest frame rotating arm, 111. Backrest frame connecting pipe, 112. Seat frame joint shell, 113. Positioning hole, 114. Driving inclined boss, 115. Unlocking inclined slot, 1151. Guide inclined plane, 12. Armrest frame rotating arm, 121. Armrest frame connecting pipe, 122. Locking ring, 123. Locking block slot, 13. Seat frame connecting arm, 131. Seat main frame, 132. Joint middle piece, 1321. Arc block, 1322. Locking block limit slot, 133. Locking block, 134. First gear locking slot, 135. Linkage extrusion block, 1351. Extrusion inclined plane, 14. Connecting fastener, 141. Second gear locking slot, 142. Guide shaft, 143. Male buckle part of the first buckle, 144. First buckle The female buckle part of the buckle, 15, locking gear, 151, sleeve-shaped unlocking inclined surface; 2, frame joint, 21, rear wheel frame fixed arm, 211, frame joint shell, 212, locking connecting block, 2121, male buckle part of the second buckle, 2122, female buckle part of the second buckle, 213, linkage unlocking member sliding guide groove, 214, linkage unlocking member, 2141, toggle plate, 2142, locking pin shaft, 215, closing plate, 216, arc-shaped unlocking groove, 2161, memory pin hole, 22, push handle rotating arm, 221, memory unlocking groove, 23, front wheel frame rotating arm, 24, press unlocking block, 241, inclined surface, 25, memory pin, 26, memory unlocking pin, 3, push handle, 4, front wheel frame, 5, rear wheel frame, 6, seat frame, 7, armrest frame, 8, backrest frame. DETAILED DESCRIPTION

[0031] The present invention will now be further described with reference to the accompanying drawings. The parts not described in detail below are all based on the prior art in the art.

[0032] like Figure 1-14 As shown, the child stroller frame of the present invention includes a push handle 3, a front wheel frame 4, a rear wheel frame 5, a seat frame 6, an armrest frame 7, a backrest frame 8, a seat frame joint 1, and a frame joint 2, wherein the two ends of the U-shaped push handle 3 are connected to the rear wheel frame 5 and the front wheel frame 4 through a frame joint 2 respectively, and the seat frame 6, the armrest frame 7, and the backrest frame 8 are connected through two seat frame joints 1.

[0033] The seat frame joint 1 and the vehicle frame joint 2 constitute the folding and unlocking mechanism of the present invention. The existence of the seat frame joint enables the backrest frame and the armrest frame to rotate relative to the seat frame to complete the folding, and the existence of the frame joint enables the push handle and the front wheel frame to rotate relative to the rear wheel frame to complete the folding. Compared with the existing technology, the present invention mainly has the following three innovations: First, after the seat frame joint of the present invention completes the rotation and folding of the backrest frame and the armrest frame into place, the seat frame can also be rotated to the same direction as the extension direction of the entire seat frame and the rear wheel frame, maximizing the folding and retracting; second, the vehicle frame joint of the present invention has a simple structure and is easy to operate. It only needs to force the locking pin shaft passing through the four perforations to disengage the perforations on the rear wheel frame fixed arm, the perforations on the front wheel frame rotating arm, and the locking perforations on the push handle rotating arm to complete the unlocking; third, after the entire seat frame (including the seat frame, armrest frame, and backrest frame) is removed from the vehicle frame, the frame joint can be manually unlocked and has an unlocking memory function. The specific innovative structure is described as follows:

[0034] In order to achieve the purpose of rotating and retracting the seat frame relative to the vehicle frame, the seat frame joint 1 of the present invention includes a backrest frame rotating arm 11, an armrest frame rotating arm 12, a seat frame connecting arm 13, and a connecting fastener 14, wherein the backrest frame rotating arm 11 includes a backrest frame connecting pipe 111 and a seat frame joint shell 112, wherein the backrest frame connecting pipe 111 is used to be fixedly connected to the backrest frame, and the seat frame joint shell 112 is not only used to seal the seat frame joint to beautify its appearance, but also serves as one of the key parts for driving the seat frame joint 1 to unlock, the backrest frame connecting pipe 111 and the seat frame joint shell 112 can be fixedly connected or integrally formed, a positioning hole 113 is formed in the center of the inner side of the seat frame joint shell 112, and a driving inclined surface boss 114 is formed on the seat frame joint shell 112 and on the circumferential side of the positioning hole 113, and the driving inclined surface boss 114 is used to match the sleeve-shaped unlocking inclined surface 151 coaxially connected to the locking gear 15, and rotate the seat frame joint. When the shell 112 is released, the driving inclined boss 114 squeezes the sleeve-shaped unlocking inclined surface 151, forcing the sleeve-shaped unlocking inclined surface 151 and the locking gear 15 to retreat to the side close to the frame joint 2, so that the locking gear 15 is disengaged from the first gear locking groove 134 on the seat frame connecting arm 13, completing the locking between the seat frame connecting arm 113 and the connecting fastener 14. The seat frame connecting arm 13 can rotate relative to the connecting fastener 14, realizing the rotation and folding of the entire seat relative to the connecting fastener, the frame joint, the frame, etc.; An unlocking bevel groove 115 is formed on the inner edge of the seat frame joint housing 112. This unlocking bevel groove 115 communicates with the inner cavity machined inside the seat frame joint housing 112. Specifically, this unlocking bevel groove 115 has an L-shaped cross-section (it is fully open on the side facing the inner cavity of the seat frame joint housing 112, and is also fully open on the side facing the inner side of the seat frame joint housing 112). The bottom of the unlocking bevel groove 115 is a bevel, and the side surface of the unlocking bevel groove 115 at its lower end is a guide bevel 1151. The unlocking bevel groove 115 is used to unlock the armrest frame rotating arm 12.

[0035] The armrest frame rotating arm 12 includes an armrest frame connecting pipe 121 and a locking ring 122, wherein the armrest frame connecting pipe 121 is used to be fixedly connected to the armrest frame, and the armrest frame connecting pipe 121 and the locking ring 122 are either fixedly connected or integrally formed, and a locking block slot 123 is provided on the inner side of the locking ring 122. The bottom of the locking block slot 123 passes through the bottom of the locking ring 122, and the side of the locking block slot 123 close to the seat frame joint shell 112 also passes through the locking ring 122. In the locked state, a locking block 133 is extended into the locking block slot 123 to prevent the locking ring 122 from rotating relative to the seat frame connecting arm 13.

[0036] The seat frame connecting arm 13 includes a seat main frame 131 and a joint middle piece 132, wherein the seat main frame 131 constitutes the two side support frames of the seat frame, the seat main frame 131 and the joint middle piece 132 are fixedly connected or integrally formed, and an outwardly protruding arc block 1321 is formed on the joint middle piece 132 and on one side facing the seat frame joint shell 112, and the outer peripheral wall of the arc block 1321 fits with the inner wall of the locking ring 122 and the inner wall of the inner cavity of the seat frame joint shell 112, and a locking block limiting groove 1322 is provided on the peripheral wall of the arc block 1321 and at the position of the locking block slot 123 corresponding to the locking ring 122, and a locking block 133 is limited in the locking block limiting groove 1322 and connected by a spring, and the locking block 133 is moved from the locking block under the action of the spring. The locking block 133 extends out from the limiting groove 1322 and extends into the locking block slot 123. The outer contour of the locking block 133 matches the inner cavity of the locking block limiting groove 1322 and the two slide together. The thickness of the locking block 133 is greater than the width of the locking block slot 123, that is, the locking block 133 must extend a portion from the side opening of the locking block slot 123, and the extended portion of the locking block 133 corresponds to the position of the unlocking bevel groove 115 on the seat frame joint shell 112. At the beginning, the portion of the locking block 133 extending from the side of the locking block slot 123 is located at the lower end of the unlocking bevel groove 115. In the process of rotating the seat frame joint shell 112, the locking block 133 is gradually squeezed by the unlocking bevel groove 115 and withdraws from the locking block slot 123, thereby realizing the unlocking of the locking ring 122. A cavity is formed on the joint middle piece 132 and on the side away from the seat frame joint shell 112 for accommodating the second gear locking groove 141 protruding from the connecting fastener 14, and a first gear locking groove 134 is formed at the bottom of the cavity. There is also a through hole in the center of the joint middle piece 132 that is coaxial with the positioning hole 113 of the seat frame joint shell 112; a linkage extrusion block 135 is fixedly connected to the outer peripheral wall of the joint middle piece 132, and an extrusion slope 1351 is formed at one end of the linkage extrusion block.

[0037] A connecting fastener 14 is rotatably engaged on one side of the joint middle piece 132 and close to the first gear locking groove 134. A second gear locking groove 141 is formed on the connecting fastener 14 and close to the side of the joint middle piece 132. A locking gear 15 is accommodated in the first gear locking groove 134 or the second gear locking groove 141, and a return spring is connected between the guide shaft 142 of the connecting fastener 14 and the locking gear 15. Under the action of the return spring, the locking gear 15 is located in the first gear locking groove 134 to achieve locking of the seat frame. The locking gear 15 is formed with a sleeve-shaped unlocking bevel 151 on the side facing the joint middle piece 132 that mates with the driving bevel boss 114 on the seat frame joint housing 112. The sleeve-shaped unlocking bevel 151 is located on the periphery of the perforation of the guide shaft 142. The sleeve-shaped unlocking bevel 151 extends through the central perforation of the joint middle piece 132, and when the driving bevel boss presses against the sleeve-shaped unlocking bevel, the sleeve-shaped unlocking bevel 151 slides laterally relative to the central perforation of the joint middle piece (the guide shaft perforation in the joint middle piece and the perforation from which the sleeve-shaped unlocking bevel extends are one and the same). A guide shaft 142 is fixedly attached to the connecting fastener 14, located at the center of the second gear locking groove 141, connecting the locking gear 15, the joint middle piece 132, the seat frame joint housing 112, and the like, so that the second gear locking groove 141, the locking gear 15, the first gear locking groove 134, the arc block 1321, and the seat frame joint housing 112 are coaxially arranged. A male buckle portion 143 of a first buckle is formed on the side of the connecting fastener 14 close to the frame joint 2 for detachable connection with the frame joint 2 to enable the entire seat to be removed from or installed on the frame.

[0038] The frame joint 2 includes a fixed portion and a rotating portion, wherein the fixed portion refers to the rear wheel frame fixed arm 21, while the rotating portion includes the push handle rotating arm 22 and the front wheel frame rotating arm 23. The rear wheel frame fixed arm 21 includes a frame joint housing 211 directly fixedly connected to the rear wheel frame, and a locking connection block 212 detachably connected to the connecting fastener 14. The frame joint housing 211 and the locking connection block 212 are fixedly connected, and the push handle rotating arm 22 and the front wheel frame rotating arm 23 are located between the frame joint housing 211 and the locking connection block 212. In the unlocked state, the push handle rotating arm 22 and the front wheel frame rotating arm 23 can perform circumferential rotation relative to the rear wheel frame fixed arm 21, and the push handle rotating arm 22 and the front wheel frame rotating arm 23 are also in rotational coordination. Specifically, a male buckle part 2121 of a second buckle is formed on the locking connection block 212 of the rear wheel frame fixing arm 21 and close to the side of the seat frame joint 1, while the female buckle part 144 of the first buckle and the female buckle part 2122 of the second buckle are fixedly connected together back to back, and the female buckle part of the first buckle and its male buckle part are detachably connected, and the female buckle part of the second buckle and its male buckle part are detachably connected, thereby realizing the detachable connection between the frame joint 2 and the seat frame joint 1; a linkage unlocking piece sliding guide groove 213 is formed on the locking connection block 212 and below the male buckle part 2121 of the second buckle, and a linkage unlocking piece sliding guide groove 213 is fitted in the linkage unlocking piece sliding guide groove 213 in a direction parallel to the axial direction of the frame joint 2. Part 214, the linkage unlocking part 214 is composed of a toggle piece 2141 and a locking pin 2142, the locking pin 2142 is fixed orthogonally to the toggle piece and close to the middle position, wherein the toggle piece 2141 slides on the linkage unlocking part sliding guide groove 213 and a closing piece 215 is fixedly connected to the free end of the linkage unlocking part sliding guide groove 213 to prevent the toggle piece 2141 from sliding out of the linkage unlocking part sliding guide groove 213, and the locking pin 2142 faces the side of the frame joint housing 211 and passes through the through hole on the locking connection block 212, the through hole on the push handle rotating arm 22, and the through hole on the front wheel frame rotating arm 23 in sequence, and then extends into the through hole on the frame joint housing 211 (all the through holes are offset from their respective axis). In the process of rotating the joint middle piece 132 to the extrusion slope 1351 on the linkage extrusion block 135 to squeeze the toggle piece 2141 outward, the locking pin 2142 that has passed through the four perforations in advance is forced to disengage from the perforations on the rear wheel frame fixed arm 21, the perforations on the front wheel frame rotating arm 23, and the perforations on the push handle rotating arm 22, thereby completing the unlocking. The front wheel frame rotating arm 23 and the push handle rotating arm 22 can rotate relative to the rear wheel frame fixed arm 21, and the outer side of the perforation of the frame joint shell 211 is closed by a fixedly connected sealing plate.During use, when the joint middle part 132 rotates to the maximum outward position of its linkage extrusion block to squeeze the toggle piece of the linkage unlocking part, the locking pin 2142 disengages from the respective through-holes of the locking connection block 212, the push handle rotating arm 22, the front wheel frame rotating arm 23, and the frame joint shell 211, thereby unlocking the frame joint 2.

[0039] In order to enable the frame joint 2 to be freely and conveniently unlocked after the seat frame joint 1 together with the entire seat is removed from the frame, an arc-shaped unlocking groove 216 is formed on the locking connecting block 212 and below the sliding guide groove 213 of the linked unlocking piece. The upper part of the arc-shaped unlocking groove 216 is communicated with the bottom of the sliding guide groove 213 of the linked unlocking piece. A press-unlocking block 24 is slidably fitted and limited in the arc-shaped unlocking groove 216. The bottom of the toggle piece 2141 passes through the bottom of the sliding guide groove 213 of the linked unlocking piece and is located on the outside of the press-unlocking block 24. The side of the press-unlocking block 24 that contacts the toggle piece 2141 (i.e., the outer side) is designed to be an inclined surface 241.

[0040] Furthermore, in order to make it unnecessary to keep the push-to-unlock block pressed by hand during the unlocking process and to make the push-to-unlock block 24 have an unlocking memory function, a pin mounting groove is provided on the push-to-unlock block 24 and toward the arc-shaped unlocking groove 216 side. A memory pin 25 is connected and limited in the pin mounting groove by a spring (the specific position should be set on the back side of the highest end of the inclined surface of the push-to-unlock block 24). Correspondingly, a memory pin hole 2161 (the memory pin hole is a through hole) is provided on the arc-shaped unlocking groove 216 and below the sliding guide groove 213 of the linked unlocking member. Pressing the unlocking block 24 to the high end of its inclined surface once squeezes the toggle piece 2141 until its locking pin shaft 2142 disengages from the four through-holes. At the same time, the memory pin 25 on the push-to-unlock block 24 partially extends into the memory pin hole 2161 The unlocking block 24 is pressed once to lock the vehicle in the unlocked state, so as to achieve the locked memory function. At this time, the memory unlocking pin 26 is partially extended into the memory pin hole 2161; a memory unlocking groove 221 is formed or opened on the push handle rotating arm 22 and toward the locking connecting block 212 side, and a memory unlocking pin 26 is limited by a spring in the memory pin hole 2161. Under the action of the spring, a part of the memory unlocking pin 26 is located in the memory pin hole 2161 (approximately extending into 1 / 2 length of the memory pin hole), and the other part is located in the memory unlocking groove 221. When the frame joint is unlocked, the push handle rotating arm 22 is rotated, and the high end around the memory unlocking groove 221 squeezes the memory unlocking pin 26 until the memory pin 25 is squeezed out of the memory pin hole 2161 to achieve memory release.

Claims

1. A folding unlocking mechanism, comprising a vehicle frame joint and a seat frame joint, characterized in that: A linkage extrusion block is processed on the rotating part of the seat frame joint; the frame joint includes a rotating part and a fixed part, wherein the rotating part and the fixed part rotate in cooperation and are both provided with locking through-holes at positions away from the center; a toggle piece is slidably fitted on the fixed part of the frame joint, and the sliding direction of the toggle piece is parallel to the axial direction of the frame joint; a locking pin shaft passing through all the through-holes is fixedly connected on the toggle piece and at a position facing the through-hole; the cooperation relationship between the linkage extrusion block and the toggle piece is that during the rotation of the linkage extrusion block, the extrusion inclined surface will squeeze the linkage unlocking part in the direction away from the through-hole, so that the locking pin shaft disengages from the through-hole and completes the unlocking of the frame joint.

2. A folding unlocking mechanism according to claim 1, characterized in that: The seat frame joint is detachably connected to the vehicle frame joint.

3. The folding unlocking mechanism according to claim 1 or 2, characterized in that: A manual unlocking part is also provided on the fixed part of the frame joint, and the manual unlocking part includes a push-to-unlock block. Correspondingly, an arc-shaped unlocking groove is provided on the fixed part of the frame joint and below the locking pin shaft. The push-to-unlocking block is limited in the arc-shaped unlocking groove and the two slide together. There is an inclined surface on the push-to-unlocking block and away from the perforation direction. The inclined surface is inclined along the sliding direction of the push-to-unlocking block, and the bottom of the toggle piece is located outside the inclined surface.

4. The folding unlocking mechanism according to claim 3, characterized in that: A pin installation groove is provided on the push-to-unlock block and toward the arc-shaped unlocking groove. A memory pin is connected to the pin installation groove through a spring. Correspondingly, a memory pin hole is provided on the arc-shaped unlocking groove and below the locking pin shaft.

5. The folding unlocking mechanism according to claim 4, characterized in that: A memory unlocking slot is provided on the rotating portion of the frame joint at a position corresponding to the memory pin hole; A memory unlocking pin is connected in the memory pin hole via a spring. Under the action of the spring, a portion of the memory unlocking pin is located in the memory pin hole and a portion is located in the memory unlocking groove.

6. The folding unlocking mechanism according to claim 2, characterized in that: The seat frame joint includes a backrest frame rotating arm, an armrest frame rotating arm, a seat frame connecting arm, and a connecting fastener; a positioning hole is provided at the center of the inner side of the backrest frame rotating arm, and a driving inclined surface boss is provided on the peripheral side of the positioning hole, and an unlocking inclined surface groove is provided on the inner edge of the backrest frame rotating arm; a locking block for locking the armrest frame rotating arm is connected to the seat frame connecting arm through a spring, and during the rotation of the backrest frame rotating arm, the unlocking inclined surface groove presses down the locking block to disengage the locking block from the armrest frame rotating arm to achieve the unlocking of the armrest frame rotating arm; a first gear locking groove is provided on the seat frame connecting arm and on one side cooperating with the connecting fastener, and correspondingly, a second gear locking groove is provided on the connecting fastener and close to the seat connecting arm side, and a guide shaft is connected to the center of the second gear locking groove, and in the first gear locking groove or the second gear locking groove The locking gear is limited, and a hole for the guide shaft to pass through is opened in the center of the locking gear, and a sleeve-shaped unlocking inclined surface is provided on the outer circumference of the hole. Correspondingly, a through hole for the guide shaft and the sleeve-shaped unlocking inclined surface to pass through is opened in the center of the seat frame connecting arm. After the sleeve-shaped unlocking inclined surface passes through the through hole, it adapts to the driving inclined surface boss; in the process of rotating the backrest frame rotating arm, the driving inclined surface boss forces the sleeve-shaped unlocking inclined surface to retreat until the locking gear is stuck in the second gear locking groove to realize the unlocking between the seat frame connecting arm and the connecting fastener. In the unlocked state, the seat frame connecting arm rotates relative to the connecting fastener; the guide shaft passes through the locking gear, the seat frame connecting arm, and the armrest frame rotating arm in sequence and then extends into the backrest frame rotating arm to realize the coaxial connection of the connecting fastener, the seat frame connecting arm, the armrest frame rotating arm and the backrest frame rotating arm.

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