Folding holding mechanism

Abstract

The invention relates to a folding keeping mechanism which is used for keeping a frame of a baby carriage in a folding state, the folding keeping mechanism is located on the frame of the baby carriage, and the folding keeping mechanism comprises a folding hook which can be switched between a locking position and an unlocking position; and an engaging part for engaging the folding hook. When the folding hook is located at the locking position, the folding hook is clamped with the clamping part; and when the folding hook is positioned at the unlocking position, the folding hook is released from the clamping part. The folding hook is provided with a retaining device used for retaining the folding hook at the unlocking position.

Description

Technical Field

[0001] The present application relates to the technical field of children's products, and in particular to a folding and retaining mechanism for a frame of a baby stroller. Background Art

[0002] The baby strollers currently sold on the market are usually foldable baby strollers, which become more compact after being folded, so as to facilitate storage and transportation. In order to prevent the baby stroller from accidentally unfolding after being folded, a folding hook is also provided on the frame of the baby stroller. A part of the folding hook is provided at the foot of the frame or the handle of the rider. When the frame is folded, the folding hook is engaged and fixed with the protrusion or foot provided on the frame, so as to prevent the folded baby stroller from accidentally unfolding. However, after such a folding hook locks the frame, the frame is often not easy to unfold. Summary of the invention

[0003] Based on this, it is necessary to provide an improved folding and holding mechanism, which can keep the folding hook in the unlocked position after the folding hook is unlocked, thereby freeing the user's hands and making the operation of unfolding the frame more convenient.

[0004] In order to achieve the above-mentioned purpose, an embodiment of the present application provides a folding and holding mechanism for keeping the frame of a baby stroller in a folded state. The folding and holding mechanism is located on the frame of the baby stroller, and the folding and holding mechanism includes: a folding hook, which can switch between a locking position and a releasing position; and a clamping portion, which is used to clamp the folding hook. When the folding hook is in the locking position, the folding hook is clamped with the clamping portion; when the folding hook is in the releasing position, the folding hook is disengaged from the clamping portion. The folding hook is provided with a retaining device for keeping the folding hook in the releasing position. By providing a retaining device to keep the folding hook in the releasing position, the user no longer needs to manually keep the folding hook in the releasing position to unfold the frame, thereby simplifying the operation of unfolding the frame, making the operation of unfolding the frame more convenient, and improving the user's experience.

[0005] In one embodiment, the folding hook comprises: a fixed portion fixedly disposed on the vehicle frame; and a movable portion movably connected to the fixed portion. The movable portion moves relative to the fixed portion so that the folding hook switches between a locking position and a releasing position.

[0006] In one embodiment, the movable portion is pivotally connected to the fixed portion to pivot between a locked position and a released position.

[0007] In one embodiment, the retaining device includes: a boss disposed on one of the fixed portion and the movable portion; and a first groove disposed on the other of the fixed portion and the movable portion. When the movable portion pivots relative to the fixed portion so that the boss engages with the first groove, the fixed portion retains the movable portion in the unlocked position.

[0008] In one embodiment, the movable part is provided with a first pushing part, and the first pushing part is configured as follows: when the movable part is in the locked position, during the process of the frame switching from the unfolded state to the folded state, the engaging part pushes the first pushing part, so that the movable part pivots to the unlocked position.

[0009] In one embodiment, the movable portion is provided with a second pushing portion, and the second pushing portion is configured such that when the movable portion is located at the unlocking position, when the frame switches from the unfolded state to the folded state, the engaging portion pushes the second pushing portion to cause the movable portion to pivot to the locked position.

[0010] In one embodiment, the movable part has a first end and a second end on both sides of the pivot axis of the movable part and the fixed part, respectively. The first end of the movable part is provided with a first pushing part, and the first pushing part is configured such that when the movable part is in the locked position, when the frame switches from the deployed state to the folded state, the engaging part pushes the first pushing part, so that the movable part pivots to the unlocked position. The second end of the movable part is provided with a second pushing part, and the second pushing part is configured such that when the movable part is in the unlocked position, when the frame switches from the deployed state to the folded state, the engaging part pushes the second pushing part, so that the movable part pivots to the locked position.

[0011] In one embodiment, the fixed part is provided with a limiting part, and the second pushing part protrudes from the pivot axis of the movable part and the fixed part. When the movable part pivots to the locking position, the limiting part abuts against the second pushing part of the movable part.

[0012] In one embodiment, the retaining device further comprises: a second groove spaced apart from the first groove. When the movable portion pivots relative to the fixed portion so that the boss engages with the second groove, the movable portion is retained in the locked position.

[0013] In one embodiment, the folding and holding mechanism further comprises: a first elastic member disposed between the fixed portion and the movable portion. The first elastic member provides a biasing force toward the locking position to the movable portion, the biasing force being smaller than the holding force provided by the holding device to keep the folding hook in the unlocking position.

[0014] In one embodiment, the curvature radius of the inner side of the boss is greater than the curvature radius of the outer side of the boss.

[0015] In one embodiment, the first groove is arranged on the movable part, and the movable part is provided with a plurality of deformation grooves beside the first groove.

[0016] In one embodiment, the movable portion is slidably connected to the fixed portion to slide between a locking position and a releasing position.

[0017] In one embodiment, the fixed part is provided with a slide rail, the movable part is provided with a slide groove matched with the slide rail, and the slide groove is sleeved on the slide rail to slidably connect the movable part to the fixed part.

[0018] In one embodiment, a limiting protrusion is provided at the first end of the slide rail, and the limiting protrusion is suitable for abutting against the movable part to prevent the movable part from detaching from the slide rail from the first end of the slide rail.

[0019] In one embodiment, the slide rail is provided with a first positioning recess and a second positioning recess, and the slide groove is provided with a positioning protrusion. When the movable part slides to make the positioning protrusion engage with the first positioning recess, the movable part is located in a locking position; when the movable part slides to make the positioning protrusion engage with the second positioning recess, the movable part is located in a releasing position.

[0020] In one embodiment, the slide rail is provided with a second positioning recess, and the slide groove is provided with a positioning protrusion. When the movable part slides to make the positioning protrusion engage with the second positioning recess, the movable part is located at the unlocking position. The folding and holding mechanism also includes a second elastic member, and the second elastic member biases the movable part in a direction away from the unlocking position.

[0021] In one embodiment, the fixed portion is provided with a limiting groove, and the limiting groove extends along the sliding direction of the movable portion. A limiting tongue is provided on one side of the movable portion facing the limiting groove, and the limiting tongue protrudes into the limiting groove. An end of the limiting tongue facing the second end of the slide rail opposite to the first end is provided with an abutting surface, and the abutting surface is suitable for abutting against a side of the limiting groove facing the second end of the slide rail to prevent the movable portion from detaching from the slide rail from the second end of the slide rail.

[0022] In one embodiment, an end of the limiting tongue facing the first end of the slide rail is provided with an inclined surface. When the slide groove is sleeved on the slide rail, the slide groove slides toward the first end of the slide rail, the second end of the slide rail presses against the inclined surface, the limiting tongue is biased in a direction away from the slide rail, and when the limiting tongue reaches the limiting groove, the limiting tongue protrudes into the limiting groove.

[0023] In one embodiment, a second elastic member is disposed in the limiting groove, and the second elastic member is disposed between the abutting surface and a side of the limiting groove facing the second end of the slide rail, and the second elastic member biases the abutting surface toward the locking position. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and other purposes, features and advantages of the present invention will become more clear through the more specific description of the preferred embodiments of the present invention shown in the accompanying drawings. The same reference numerals indicate the same parts in all the accompanying drawings, and the accompanying drawings are not deliberately scaled to the actual size, and the focus is on illustrating the main purpose of the present invention.

[0025] Other features, objectives and advantages of the present invention will become more apparent from a reading of the detailed description of non-limiting embodiments made with reference to the following accompanying drawings.

[0026] Figure 1a The present invention is a schematic perspective view of a baby stroller frame in the prior art in an unfolded state.

[0027] Figure 1b The figure is a schematic perspective view of a baby stroller frame in a folded state in the prior art.

[0028] Figure 2 It is a schematic perspective view of a baby stroller frame in a folded state according to an embodiment of the present application, wherein the folding hook is in a locked position.

[0029] Figure 3 for Figure 2 A partial enlarged view of part A in the middle.

[0030] Figure 4 For along Figure 3 Cross-sectional view taken along line BB.

[0031] Figure 5 It is a schematic perspective view of a baby stroller frame in a folded state according to an embodiment of the present application, wherein the folding hook is in a released position.

[0032] Figure 6 for Figure 5 A partial enlarged view of the middle L part.

[0033] Figure 7 For along Figure 6 Cross-sectional view taken along line CC.

[0034] Figure 8 It is a schematic structural diagram of the movable part of the folding hook according to an embodiment of the present application.

[0035] Fig. 9 It is a schematic structural diagram of a fixing portion of a folding hook according to an embodiment of the present application.

[0036] Fig.10 It is a schematic perspective view of a baby stroller frame in an unfolded state according to an embodiment of the present application, wherein the folding hook is in a locked position.

[0037] Fig.11 It is a schematic perspective view of a baby stroller frame in an unfolded state according to an embodiment of the present application, wherein the folding hook is in a released position.

[0038] Fig.12 For along Fig.10 Cross-sectional view taken along line DD.

[0039] Fig.13 For along Fig.11 Cross-sectional view taken along line EE.

[0040] Fig.14 for Fig.12 A partial enlarged view of part F in the middle.

[0041] Fig.15 FIG. 4 is an exploded view of a folding hook according to an embodiment of the present application.

[0042] Fig.16 It is a schematic perspective view of a baby stroller frame in an unfolded state according to an embodiment of the present application, wherein the folding hook is in a locked position.

[0043] Fig.17 It is a schematic perspective view of a baby stroller frame in an unfolded state according to an embodiment of the present application, wherein the folding hook is in a released position.

[0044] Fig.18 It is a schematic perspective view of a baby stroller frame in a folded state according to an embodiment of the present application, wherein the folding hook is in a locked position.

[0045] Fig.19 It is a schematic perspective view of a baby stroller frame in a folded state according to an embodiment of the present application, wherein the folding hook is in a released position.

[0046] Fig. 20 A perspective view of a folding retention mechanism according to an embodiment of the present application, wherein the folding hook is in a locked position.

[0047] Fig.21 A perspective view of a folding and retaining mechanism according to an embodiment of the present application, wherein the folding hook is in a released position.

[0048] Fig. 22 For along Fig. 20 The view observed from direction I.

[0049] Fig.23 For along Fig. 20 Cross-sectional view taken along line GG.

[0050] Fig.24 For along Fig.21 The view observed from direction J.

[0051] Fig.25 For along Fig.21 Cross-sectional view taken along line HH.

[0052] Fig.26 It is a schematic structural diagram of the movable part of the folding hook according to an embodiment of the present application.

[0053] Fig. 27 For along Fig.26 Cross-sectional view taken along line KK.

[0054] Fig.28 A folding and holding mechanism in a locked position according to an embodiment of the present application Fig. 22Sectional view from the same perspective.

[0055] Fig.29 A folding and holding mechanism in a locked position according to an embodiment of the present application Fig.23 Sectional view from the same perspective.

[0056] Fig.30 A folding and holding mechanism in a release position according to an embodiment of the present application Fig.24 Sectional view from the same perspective.

[0057] Fig.31 A folding and holding mechanism in a release position according to an embodiment of the present application Fig.25 Sectional view from the same perspective.

[0058] Reference numerals list

[0059] 1. frame, 10. rider, 11. rear foot, 12. front foot, 20. folding and holding mechanism, 21. engaging portion, 211. engaging groove, 212. engaging protrusion, 2120. locking groove, 22. folding hook, 23. holding device 221. movable portion, 2211. first pushing portion, 2212. engaging hook, 2213. second pushing portion, 2214. pivoting groove, 2215. boss, 2216. deformation groove, 2217. limiting tongue, 22171. abutting surface, 22172. inclined surface,

[0060] 222, a fixing portion, 2221, a first limiting portion, 2222, a second limiting portion, 2223, a connecting portion, 2224, a pivoting body, 2225, a first groove, 2226, a second groove, 2227, a limiting groove, 2228, a fixing seat, 223, a first elastic member,

[0061] 300, slide groove, 310, limit concave, 320, positioning convex,

[0062] 400, slide rail, 410, limiting protrusion, 420, first positioning recess, 430, second positioning recess, 500, second elastic member,

[0063] 9. frame, 90. folding hook, 901. hook, 91. engaging portion, 92. rider, 93. front foot, 94. rear foot, 911. slot. DETAILED DESCRIPTION

[0064] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0065] It should be noted that when an element is considered to be "connected" to another element, it may be directly connected to another element and integrated therewith, or there may be an intermediate element at the same time. The terms "installed", "one end", "the other end" and similar expressions used herein are for illustrative purposes only.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0067] The inventor of the present application has found through research that when a user (a baby's caregiver) unfolds the frame of a baby stroller, he needs to release the folding hook with one hand and manually keep the folding hook in the unlocked position, while using the other hand to pivot the foot or handle to unfold the frame. At this time, if the user's hands are occupied by other matters, such as holding the baby or other objects, or if the user's hands are injured, it is difficult to unfold the frame.

[0068] refer to Figure 1a and Figure 1b , Figure 1a and Figure 1bThe frame 9 of a baby stroller in the prior art is shown, and the seat part of the baby stroller and the cloth cover for wrapping the frame are omitted in this figure. The frame 9 includes a group of front feet 93, a group of rear feet 94 pivotally connected to the front feet, and a rider 92 that can pivot relative to the front feet or the rear feet. Through the pivoting movement between the front feet 93, the rear feet 94 or the rider 92, the frame 9 can switch between the unfolded state and the folded state. In this example, a folding hook 90 made of elastic material is provided on the rear feet of the frame 9, and a hook 901 is provided at one end of the folding hook 90. ​​A clamping portion 91 is also provided on the rider 92 of the frame 9, and the clamping portion 91 is provided with a clamping groove 911. In other embodiments, the folding hook 90 can also be provided at the front feet 93 or the rider 92. When the frame 9 is in the folded state, the front foot 93 and the rear foot 94 on the same side are close to each other, and the hook 901 of the folding hook 90 is engaged in the slot 911 of the engaging portion 91, that is, the folding hook 90 is in the locked position to keep the frame 9 in the folded state. When the user needs to unfold the frame 9 from the folded state, the user needs to apply external force to the folding hook 90 so that the folding hook is deformed in a direction away from the engaging portion 90 to move the hook 901 out of the slot 911, thereby releasing the engagement between the folding hook 90 and the engaging portion 91. Further, the user needs to continuously apply external force to the folding hook 90 to keep the folding hook 90 in the unlocking position to unfold the frame 9. Since the folding hook 90 needs to be continuously applied with force during the process of unfolding the frame 9, this often occupies one hand of the user, so that the user has to use the other hand to unfold the frame 9, resulting in difficulty in the operation of unfolding the frame 9. Furthermore, when switching the vehicle frame 9 from the unfolded state to the folded state, the user is also required to apply external force to the folding hook 90 to switch the folding hook 90 to the unlocking position to allow the folding hook 90 to engage with the engaging portion 91, which also causes inconvenience to the user.

[0069] refer to Figures 2 to 9 In one embodiment of the present application, a folding and retaining mechanism 20 is provided. Figure 2 1 shows a schematic perspective view of a baby stroller frame 1 in a folded state, and a folding and holding mechanism 20 is provided on the frame 1. The folding and holding mechanism 20 is provided on the frame 1 of the baby stroller, and the frame 1 can be switched between a folded state and an unfolded state. Figure 2 and Figure 3The folding and holding mechanism 20 includes: a clamping portion 21 provided on the rider's handle 10 of the frame 1 and a folding hook 22 provided on the rear leg 11 of the frame 1. In the present embodiment, the clamping portion 21 is a plastic set that is sleeved on the outside of the rider's handle 10. Optionally, the clamping portion 21 may also be a metal pipe constituting the rider's handle or the rear leg. The folding hook 22 can switch between a locking position and a releasing position. When the frame 1 is in the folded state and the folding hook 22 is in the locking position, the folding hook 22 engages with the clamping portion 21 to lock the frame 1 in the folded state. When the frame 1 is in the folded state and the folding hook 22 is in the releasing position, the folding hook 22 disengages from the clamping portion 21 to allow the frame 1 to switch to the unfolded state. Those skilled in the art can understand that: the arrangement of the engaging portion 21 on the rider 10 of the frame 1 and the arrangement of the folding hook 22 on the rear foot 11 of the frame 1 are only exemplary, and the engaging portion 21 and the folding hook 22 can also be arranged at other suitable positions of the rider 10, as long as the following requirements can be met: when the frame 1 is in the folded state and the folding hook 22 is in the locked position, the folding hook 22 engages with the engaging portion 21 to lock the frame 1 in the folded state; and when the frame 1 is in the folded state and the folding hook 22 is in the unlocked position, the folding hook 22 is disengaged from the engaging portion 21 to allow the frame 1 to switch to the unfolded state. For example, the engaging portion 21 can be arranged on the rear foot 11 of the frame 1, and the folding hook 22 can be arranged on the rider 10 of the frame 1. Optionally, the engaging portion 21 is provided with a slot 211, and the folding hook 22 is provided with a hook 2212. When the hook 2212 is engaged in the slot 211, the folding hook 22 is in a locked position. It can be understood by those skilled in the art that the slot 211 and the hook 2212 are only exemplary, and the engaging portion 21 and the folding hook 22 can also be provided with other suitable engagement mechanisms, as long as the requirement of engaging and locking the folding hook 22 with the engaging portion 21 is met. For example, the engaging portion 21 can be provided with a first hook, and the folding hook 22 can be provided with a second hook, and the first hook can be engaged and locked with the second hook.

[0070] For reference Figure 4 and Figure 6 The retracting hook 22 includes: a fixed portion 222, which is fixedly arranged on the vehicle frame 1; and a movable portion 221, which is movably connected to the fixed portion 222. Optionally, a fixed seat 2228 is arranged on the fixed portion 222, and the fixed portion 222 is fixedly arranged on the vehicle frame 1 by the cooperation of a connecting member such as a bolt and the fixed seat 2228. The movable portion 221 moves relative to the fixed portion 222 to switch between the locking position and the unlocking position. Specifically, in Figures 2 to 9In the illustrated embodiment, the movable portion 221 is pivotally connected to the fixed portion 222, and the movable portion 221 pivots relative to the fixed portion 222 to switch between the locked position and the unlocked position. A pivot slot 2214 is provided at one end of the movable portion 221, and a pivot body 2224 is provided at one end of the fixed portion 222. The pivot body 2224 is pivotally connected to the pivot slot 2214, for example, by a pivot pin (not shown). Thus, the movable portion 221 can pivot relative to the fixed portion 222 around the pivot pin. Optionally, the positions of the pivot slot 2214 and the pivot body 2224 can be interchanged, that is, the pivot body 2224 is provided at one end of the movable portion 221, and the pivot slot 2214 is provided at one end of the fixed portion 222, and the present application does not limit this.

[0071] For reference Figure 8 and Fig. 9 In one embodiment, a boss 2215 is provided in the pivoting groove 2214, and a first groove 2225 is provided on the pivoting body 2224. Optionally, the positions of the boss 2215 and the first groove 2225 can be interchanged, that is, the first groove 2225 is provided in the pivoting groove 2214, and the boss 2215 is provided on the pivoting body 2224, and the present application does not limit this. When the movable part 221 pivots to the unlocking position, so that the boss 2215 is engaged with the first groove 2225, the movable part 221 is maintained in the unlocking position. Thus, the boss 2215 and the first groove 2225 jointly form a retaining device 23, which is at least used to retain the folding hook 22 in the unlocking position. Optionally, the retaining device 23 may also include a second groove 2226, which is provided together with the first groove 2225 on one of the pivoting groove 2214 and the pivoting body 2224. When the movable portion 221 pivots to the locking position so that the boss 2215 engages with the second groove 2226, the movable portion 221 is maintained in the locking position. The setting of the retaining device 23 enables the folding hook 22 to be maintained in the unlocking position, so as to facilitate the user to fold or unfold the frame 1. Specifically, for example, when folding the frame 1, the user only needs to switch the movable portion 221 of the folding hook 22 to the unlocking position, and under the action of the retaining device 23, the movable portion 221 will be maintained in the unlocking position to allow the frame 1 to be switched to the folded state; for example, when unfolding the frame 1, the user only needs to switch the movable portion 221 of the folding hook 22 to the unlocking position, and under the action of the retaining device 23, the movable portion 221 will be maintained in the unlocking position to allow the frame 1 to be switched to the unfolded state. By providing a retaining device 23 to keep the folding hook 22 in the unlocking position, the user is prevented from continuously applying force to the movable portion 221 to keep the movable portion 221 in the unlocking position, thereby allowing the user to fold or unfold the frame 1 with both hands at the same time, simplifying the operation and improving the folding or unfolding efficiency.

[0072] For reference Figure 4 and Figure 7In one embodiment, the folding hook 22 is provided with a first limiting portion 2221 and a second limiting portion 2222. Optionally, the first limiting portion 2221 can be provided at one end of the fixed portion 222 close to the movable portion 221, or at one end of the movable portion 221 close to the fixed portion 222. Specifically, the first limiting portion 2221 is provided as a protrusion, and when the movable portion 221 pivots to the unlocking position (such as Figure 7 ), the first limiting portion 2221 abuts against the fixed portion 222 or the movable portion 221 to limit the movable portion 221 from pivoting beyond the unlocking position. Optionally, the second limiting portion 2222 can be arranged at one end of the fixed portion 222 close to the movable portion 221, or at one end of the movable portion 221 close to the fixed portion 222, and the second limiting portion 2222 and the first limiting portion 2221 are arranged on the opposite side of the fixed portion 222 or one end of the fixed portion 222. Specifically, the second limiting portion 2222 can also be arranged as a protrusion, and when the movable portion 221 pivots to the locking position (as shown in FIG. 1 ), the movable portion 221 is locked. Figure 4 As shown in FIG. 1 , the second limiting portion 2222 abuts against the fixed portion 222 or the movable portion 221 to limit the movable portion 221 from pivoting beyond the locking position.

[0073] Continue to refer Figure 4 and Figure 7 In one embodiment, one end of the fixed portion 222 away from the movable portion 221 is fixed to the inner side of the frame 1 (e.g., the rear leg 11). In the present application, the term "inner side" refers to the side facing the frame 1, and the term "outer side" refers to the side away from the frame 1. A curved connecting portion 2223 is provided between the two ends of the fixed portion 222. The shape of the connecting portion 2223 is configured such that no matter whether the movable portion 221 is in the locked position or the unlocked position, the projection of the folding hook 22 on the leg 11 will not exceed the outer side of the leg 11, thereby making the structure of the folding hook 22 more compact.

[0074] Continue to refer Figure 4 and Figure 7In one embodiment, a first pushing portion 2212 is provided at one end of the movable portion 221 away from the fixed portion 222. The first pushing portion 2212 is configured such that: when the movable portion 221 is in the locked position, when the frame 1 switches from the unfolded state to the folded state, the engaging portion 21 pushes the first pushing portion 2212, so that the movable portion 221 avoids the engaging portion 21, so as to allow the frame 1 to enter the folded state. Specifically, the first pushing portion 2212 is configured as an arc surface or an inclined surface. When the movable portion 221 is in the locked position, when the frame 1 switches from the unfolded state to the folded state, the engaging portion 21 pushes the arc surface or the inclined surface to press the movable portion 221. On the one hand, the force generated by the pressure cannot overcome the holding force of the holding device 23 to make the movable portion 221 out of the locked position. On the other hand, the force generated by the pressure causes the movable portion 221 to deform in a direction away from the engaging portion 21. Thus, the movable portion 221 avoids the engaging portion 21, and the hook 2212 gradually enters and engages in the engaging groove 211. Finally, the movable portion 221 is located at the locking position, and the folding hook 22 engages with the engaging portion 21, locking the frame 1 in the folded state.

[0075] Optionally, in one embodiment, a second pushing portion 2213 is provided at one end of the movable portion 221 close to the fixed portion 222, and the second pushing portion 2213 is configured as follows: when the movable portion 221 is located at the unlocking position, when the frame 1 switches from the unfolded state to the folded state, the engaging portion 21 pushes the second pushing portion 2213, so that the movable portion 221 pivots to the locked position, so as to lock the frame 1 in the folded state. Specifically, the second pushing portion 2213 is configured as an arc surface or an inclined surface, and when the movable portion 221 is located at the unlocking position, when the frame 1 switches from the unfolded state to the folded state, the engaging portion 21 pushes the arc surface or the inclined surface, so that the movable portion 221 pivots toward the locked position. Thus, as the frame 1 gradually enters the folded state, the movable portion 221 gradually enters the locked position, and the hook 2212 gradually enters and engages in the slot 211. Finally, the movable portion 221 is located at the locking position, and the folding hook 22 is engaged with the engaging portion 21 to lock the frame 1 in the folded state.

[0076] Optionally, refer to Figure 8 A plurality of deformation grooves 2216 are provided at the portion of the pivot groove 2214 near the boss 2216. The deformation grooves 2216 are suitable for providing a flexible space for the structure near the boss 2216 to prevent fatigue fracture of the structure near the boss 2216 caused by deformation generated when the boss 2216 is engaged or disengaged with the first groove 2225 (and / or the second groove 2226). Preferably, a deformation groove 2216 is symmetrically provided on both sides of the boss 2216.

[0077] Figures 10 to 15Another embodiment of the present application is shown. The structure of the folding and holding mechanism 20 according to this embodiment is substantially the same as that of the folding and holding mechanism 20 according to the previous embodiment. Only the distinguishing features are described below. Figures 10 to 13 In this embodiment, the boss 2215 is disposed on the pivot body 2224, and the first groove 2225 and the second groove 2226 are disposed on the pivot slot 2214. Optionally, the first groove 2225 is configured as a through hole.

[0078] refer to Fig.14 , the bending radius of the inner side of the boss 2215 is different from the bending radius of the outer side of the boss 2215. In the present application, the term "inner side of the boss 2215" refers to the side of the boss 2215 facing the frame 1, for example, Fig.14 The term "outer side of the boss 2215" refers to the side of the boss 2215 that faces away from the frame 1, for example, Fig.14 The right side of the middle boss 2215. Optionally, the bending radius of the inner side of the boss 2215 is greater than the bending radius of the outer side of the boss 2215. In other words, the slope of the inner side of the boss 2215 is gentler than the slope of the outer side of the boss 2215. Therefore, the external force required for the boss 2215 to enter the first groove 2225 is smaller than the external force required for the boss 2215 to escape from the first groove 2225, that is, only a relatively small force needs to be applied to make the movable part 221 enter the unlocking position. Correspondingly, a relatively large force needs to be applied to make the movable part 221 escape from the unlocking position. Such a setting helps to keep the movable part 221 in the unlocking position, which will facilitate the expansion or folding of the frame 1.

[0079] Optionally, refer to Fig.15 In one embodiment, a first elastic member 223 is provided between the fixed portion 222 and the movable portion 221, and the first elastic member 223 provides a biasing force toward the locking position to the movable portion 221. Specifically, the first elastic member 223 is a torsion spring, which applies a torque to the movable portion 221, so that the movable portion 221 has a tendency to move toward the locking position. The torque applied by the torsion spring is less than the retaining force provided by the retaining device 23 to retain the movable portion 221 (i.e., the folding hook 22) in the unlocking position. That is, when the movable portion 221 is in the unlocking position, the torque applied by the torsion spring cannot cause the movable portion 221 to escape from the unlocking position. The provision of the torsion spring, on the one hand, can reduce the force required for the user to switch the movable portion 221 to the locking position, thereby facilitating operation; on the other hand, it can prevent the folding hook 22 from being accidentally released when the frame 1 is in the folded state. Continue to refer to Fig.15 In this embodiment, the deformation groove 2216 is arranged at a portion of the movable portion 221 (pivot groove 2214) close to the first groove 2225. Preferably, one deformation groove 2216 is symmetrically arranged on both sides of the first groove 2225.

[0080] Figures 16 to 27 Another embodiment of the present application is shown. In this embodiment, reference Figures 17 to 21 The movable part 221 is slidably connected to the fixed part 222, and the movable part 221 slides relative to the fixed part 222 to switch between the locked position and the unlocked position. Optionally, the engaging part 21 is provided with a locking protrusion 212. When the frame 1 is in the folded state and the movable part 221 is in the locked position, the hook 2212 of the movable part 221 is hooked with the locking protrusion 212 provided on the engaging part 21 to lock the frame 1 in the folded state. Preferably, a locking groove 2120 is provided on the locking protrusion 212, and at least a part of the hook 2212 can enter the locking groove 2120 to be more stably hooked with the locking protrusion 212.

[0081] refer to Fig. 22 In one embodiment, the fixed part 222 is provided with a slide rail 400, and the movable part 221 is provided with a slide groove 300 that cooperates with the slide rail 400. The slide groove 300 is sleeved on the slide rail 400 to slidably connect the movable part 221 to the fixed part 222. A limiting protrusion 410 is provided at the first end of the slide rail 400, and a limiting recess 310 is provided at one end of the slide groove 300 close to the limiting protrusion 410. The limiting protrusion 410 is suitable for abutting against the limiting recess 310 to prevent the movable part 221 from detaching from the slide rail 400 from the first end of the slide rail 400. The slide rail 400 is provided with a first positioning recess 420 and a second positioning recess 430, and the slide groove 300 is provided with a positioning protrusion 320. When the movable part 221 slides to make the positioning protrusion 320 engage with the first positioning recess 420, the movable part 221 enters the locking position; when the movable part 221 slides to make the positioning protrusion 320 engage with the second positioning recess 430, the movable part 221 enters the unlocking position. Optionally, the position of the first positioning recess 420 is set so that when the movable part 221 slides to make the positioning protrusion 320 engage with the first positioning recess 420, the movable part 221 enters the locking position, at which time the limiting recess 310 is not in contact with the limiting protrusion 410, or the limiting recess 310 just rests on the limiting protrusion 410.

[0082] refer to Fig.23In one embodiment, a limiting groove 2227 is further provided on one side of the slide rail 400, and the limiting groove 2227 extends along the sliding direction of the movable part 221. A limiting tongue 2217 is provided on one side of the slide groove 300 facing the limiting groove 2227, and the limiting tongue 2217 protrudes into the limiting groove 2227. Specifically, an end of the limiting tongue 2217 facing the second end of the slide rail 400 opposite to the first end is provided with an abutting surface 22171, and the abutting surface 22171 is suitable for abutting against a side of the limiting groove 2227 facing the second end of the slide rail 400 to prevent the movable part 221 from detaching from the slide rail 400 from the second end of the slide rail 400. Optionally, an end of the limiting tongue 2217 facing the first end of the slide rail 400 is further provided with an inclined surface 22172. When the slide groove 300 is sleeved on the slide rail 400, the slide groove 300 slides toward the first end of the slide rail 400, the second end of the slide rail 400 presses against the inclined surface 22172, and the limiting tongue 2217 is biased toward the direction away from the slide rail 400. When the limiting tongue 2217 reaches the limiting groove 2227, the limiting tongue 2217 protrudes into the limiting groove 2227. In this embodiment, when the movable part 221 is sleeved on the fixed part 222, the slide groove 300 is first sleeved on the second end of the slide rail 400, and the second end of the slide rail 400 presses against the inclined surface 22172. The groove 300 slides toward the first end of the slide rail 400, and the limiting tongue 2217 is biased toward the direction away from the slide rail 400 under the pressure of the second end of the slide rail 400. When the limiting tongue 2217 reaches the limiting groove 2227 , the limiting tongue 2217 protrudes into the limiting groove 2227 , and at this time, the operation of sleeve-mounting the movable portion 221 on the fixed portion 222 is completed.

[0083] Optionally, a second elastic member 500 is provided in the limiting groove 2227, and the second elastic member 500 is provided between the abutting surface 22171 and one side of the limiting groove 2227 close to the second end of the slide rail 400, and the second elastic member 500 provides a biasing force toward the locking position to the abutting surface 22171. Optionally, the second elastic member 500 is a pressure spring, and the pressure spring applies a biasing force to the movable portion 221, so that the movable portion 221 has a tendency to move toward the locking position. The biasing force applied by the pressure spring is smaller than the holding force between the second positioning recess 430 and the positioning protrusion 320. Fig.25 As shown, the movable portion 221 is in the unlocking position, that is, the positioning protrusion 320 is engaged in the second positioning recess 430, and the pressure spring has the maximum compression and the maximum biasing force. The maximum biasing force applied by the pressure spring cannot make the movable portion 221 disengage from the unlocking position, that is, the positioning protrusion 320 cannot disengage from the second positioning recess 430. Fig.23As shown, the movable part 221 is in the locked position, that is, the positioning protrusion 320 is engaged in the first positioning recess 420, and the pressure spring has a minimum compression amount and a minimum biasing force. The minimum biasing force applied by the pressure spring can help to keep the movable part 221 in the locked position. The provision of the pressure spring, on the one hand, can reduce the force required by the user to switch the movable part 221 to the locked position, making the operation easier; on the other hand, it helps to keep the folding hook 22 in the locked position to prevent the accidental unlocking of the folding hook 22 when the frame 1 is in the folded state. In this embodiment, optionally, the first positioning recess 420 may not be provided, and the movable part 221 is kept in the locked position by the biasing force provided by the second elastic member 500. This will be discussed below in conjunction with Figure 28 to Figure 31 Detailed description.

[0084] Fig.24 and Fig.25 The movable portion 221 is shown in the unlocked position. Optionally, the position of the second positioning recess 430 is set so that when the movable portion 221 slides to make the positioning protrusion 320 engage the second positioning recess 430, the movable portion 221 enters the unlocked position, at which time the abutting surface 22171 does not contact the side of the limiting groove 2227 close to the second end of the slide rail 400, or the abutting surface 22171 just abuts against the side of the limiting groove 2227 close to the second end of the slide rail 400. In the embodiment provided with the second elastic member 500, the position of the second positioning recess 430 is set so that when the movable portion 221 slides to make the positioning protrusion 320 engage the second positioning recess 430, the movable portion 221 enters the unlocked position, at which time the second elastic member 500 has not yet reached the maximum compression, or the second elastic member 500 has just reached the maximum compression.

[0085] Figure 29 to Figure 31 The movable part 221 and the fixed part 222 of the folding and holding mechanism 20 according to another embodiment of the present application are shown. In this embodiment, the slide rail 400 is not provided with the first positioning recess 420, but only with the second positioning recess 430. The slide groove 300 is provided with a positioning protrusion 320. When the movable part 221 slides to make the positioning protrusion 320 engage the second positioning recess 430, the movable part 221 enters the unlocking position. The second elastic member 500 is provided between the abutting surface 22171 and the side of the limiting groove 2227 close to the second end of the slide rail 400 (refer to Fig.29 and Fig.31 ), the second elastic member 500 provides a biasing force toward the locking position to the abutting surface 22171. Optionally, the second elastic member 500 is a pressure spring, which applies pressure to the movable portion 221, so that the movable portion 221 has a tendency to move toward the locking position. The maximum biasing force applied by the pressure spring is less than the holding force between the second positioning recess 430 and the positioning protrusion 320. Fig.31As shown in FIG. 1 , the movable portion 221 is in the unlocking position (the positioning protrusion 320 is engaged in the second positioning recess 430), at which time the pressure spring has the maximum compression amount and the maximum biasing force. The maximum biasing force applied by the pressure spring cannot cause the movable portion 221 to escape from the unlocking position, that is, the positioning protrusion 320 cannot escape from the second positioning recess 430. Fig.29 As shown, the movable part 221 is in the locked position, and the pressure spring has the minimum compression and the minimum bias force. The minimum bias force applied by the pressure spring is sufficient to keep the movable part 221 in the locked position. The setting of the pressure spring can, on the one hand, reduce the force required by the user to switch the movable part 221 to the locked position, making the operation easier; on the other hand, it can keep the folding hook 2 in the locked position to prevent the folding hook 22 from being accidentally released when the frame 1 is in the folded state.

[0086] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A folding and holding mechanism (20) for holding a frame (1) of a baby stroller in a folded state, the folding and holding mechanism (20) being located on the frame (1) of the baby stroller, characterized in that: The folding and holding mechanism (20) comprises: A folding hook (22) capable of switching between a locking position and a releasing position; and A locking portion (21) for locking the retracting hook (22); Wherein, when the folding hook (22) is located at the locking position, the folding hook (22) is engaged with the engaging portion (21); when the folding hook (22) is located at the unlocking position, the folding hook (22) is released from the engaging portion (21). Wherein, the folding hook (22) is provided with a retaining device (23) for retaining the folding hook (22) in the unlocking position.

2. The folding and holding mechanism (20) according to claim 1, characterized in that: The folding hook (22) comprises: A fixing portion (222) is fixedly disposed on the vehicle frame (1), and a movable portion (221) movably connected to the fixed portion (222), The movable portion (221) moves relative to the fixed portion (222) so that the retractable hook (22) switches between the locking position and the unlocking position.

3. The folding and holding mechanism (20) according to claim 2, characterized in that: The movable portion (221) is pivotally connected to the fixed portion (222) to pivot between the locking position and the unlocking position.

4. The folding and holding mechanism (20) according to claim 3, characterized in that: The holding device (23) comprises: a boss (2215) disposed on one of the fixed portion (222) and the movable portion (221); and a first groove (2225) disposed on the other of the fixed portion (222) and the movable portion (221), When the movable portion (221) is pivoted relative to the fixed portion (222) so that the boss (2215) engages with the first groove (2225), the fixed portion (222) holds the movable portion (221) at the unlocking position.

5. The folding and holding mechanism (20) according to claim 3, characterized in that: The movable portion (221) is provided with a first pushing portion (2211), and the first pushing portion (2211) is configured as follows: When the movable portion (221) is located at the locking position, during the process of the frame (1) switching from the unfolded state to the folded state, the engaging portion (21) pushes the first pushing portion (2211), causing the movable portion (221) to pivot to a disengaged locking position.

6. The folding and holding mechanism (20) according to claim 3, characterized in that: The movable portion (221) is provided with a second pushing portion (2213), and the second pushing portion (2213) is configured as follows: When the movable portion (221) is located at the unlocking position, when the frame (1) switches from the unfolded state to the folded state, the engaging portion (21) pushes the second pushing portion (2213), causing the movable portion (221) to pivot to the locking position.

7. The folding and holding mechanism (20) according to claim 3, characterized in that: The movable portion (221) has a first end and a second end respectively on both sides of a pivot axis between the movable portion (221) and the fixed portion (222). The first end of the movable portion (221) is provided with a first pushing portion (2211), and the first pushing portion (2211) is configured as follows: When the movable portion (221) is located in the locked position, when the frame (1) switches from the unfolded state to the folded state, the engaging portion (21) pushes the first pushing portion (2211), causing the movable portion (221) to pivot to the unlocked position. The second end of the movable portion (221) is provided with a second pushing portion (2213), and the second pushing portion (2213) is configured as follows: When the movable portion (221) is located at the unlocking position, when the frame (1) switches from the unfolded state to the folded state, the engaging portion (21) pushes the second pushing portion (2213), causing the movable portion (221) to pivot to the locking position.

8. The folding and holding mechanism (20) according to claim 6 or 7, characterized in that: The fixed portion (222) is provided with a limiting portion (2222), and the second pushing portion (2213) protrudes from the pivot axis between the movable portion (221) and the fixed portion (222). When the movable portion (221) pivots to the locking position, the limiting portion (2222) abuts against the second pushing portion (2213) of the movable portion (221).

9. The folding and holding mechanism (20) according to claim 4, characterized in that: The holding device (23) further comprises: a second groove (2226) spaced apart from the first groove (2225), When the movable portion (221) is pivoted relative to the fixed portion (222) so that the boss (2215) engages with the second groove (2226), the movable portion (221) is maintained in the locked position.

10. The folding and holding mechanism (20) according to claim 4, characterized in that: It also includes: a first elastic member (223) disposed between the fixed portion (222) and the movable portion (221), the first elastic member (223) providing the movable portion (221) with a biasing force toward the locking position, the biasing force being smaller than a retaining force provided by the retaining device (23) to retain the folding hook (22) in the unlocking position.

11. The folding and holding mechanism (20) according to claim 4, characterized in that: The bending radius of the inner side of the boss (2215) is greater than the bending radius of the outer side of the boss (2215).

12. The folding and holding mechanism (20) according to claim 9, characterized in that: The first groove (2225) is arranged on the movable part (221), and the movable part (221) is provided with a plurality of deformation grooves (2216) beside the first groove (2225).

13. The folding and holding mechanism (20) according to claim 2, characterized in that: The movable portion (221) is slidably connected to the fixed portion (222) so as to slide between the locking position and the unlocking position.

14. The folding and holding mechanism (20) according to claim 13, characterized in that: The fixed part (222) is provided with a slide rail (400), and the movable part (221) is provided with a slide groove (300) matched with the slide rail (400), and the slide groove (300) is sleeved on the slide rail (400) to slidably connect the movable part (221) to the fixed part (222).

15. The folding and holding mechanism (20) according to claim 14, characterized in that: A limiting protrusion (410) is provided at the first end of the slide rail (400), and the limiting protrusion (410) is suitable for abutting against the movable part (221) to prevent the movable part (221) from detaching from the slide rail (400) from the first end of the slide rail (400).

16. The folding and holding mechanism (20) according to claim 14, characterized in that: The slide rail (400) is provided with a first positioning recess (420) and a second positioning recess (430), and the slide groove (300) is provided with a positioning protrusion (320). When the movable portion (221) slides until the positioning protrusion (320) engages with the first positioning recess (420), the movable portion (221) is located at the locking position; When the movable portion (221) slides until the positioning protrusion (320) engages with the second positioning recess (430), the movable portion (221) is located at the unlocking position.

17. The folding and holding mechanism (20) according to claim 14, characterized in that: The slide rail (400) is provided with a second positioning recess (430), and the slide groove (300) is provided with a positioning protrusion (320). When the movable portion (221) slides until the positioning protrusion (320) engages with the second positioning recess (430), the movable portion (221) is located at the unlocking position. The folding and retaining mechanism (20) further comprises a second elastic member (500), wherein the second elastic member (500) biases the movable portion (221) in a direction away from the unlocking position.

18. The folding and holding mechanism (20) according to claim 15, characterized in that: The fixed portion (222) is provided with a limiting groove (2227), and the limiting groove (2227) extends along the sliding direction of the movable portion (221). A limiting tongue (2217) is provided on one side of the movable portion (221) facing the limiting groove (2227), and the limiting tongue (2217) protrudes into the limiting groove (2227). An end of the limiting tongue (2217) facing the second end of the slide rail (400) opposite to the first end is provided with an abutment surface (22171), and the abutment surface (22171) is suitable for abutting against a side of the limiting groove (2227) facing the second end of the slide rail (400) to prevent the movable part (221) from detaching from the slide rail (400) from the second end of the slide rail (400).

19. The folding and holding mechanism (20) according to claim 18, characterized in that: An inclined surface (22172) is provided at one end of the limiting tongue (2217) facing the first end of the slide rail (400). When the slide groove (300) is mounted on the slide rail (400), the slide groove (300) slides toward the first end of the slide rail (400), the second end of the slide rail (400) presses against the inclined surface (22172), and the limiting tongue (2217) is biased in a direction away from the slide rail (400). When the limiting tongue (2217) reaches the limiting groove (2227), the limiting tongue (2217) protrudes into the limiting groove (2227).

20. The folding and holding mechanism (20) according to claim 18, characterized in that: A second elastic member (500) is provided in the limiting groove (2227), and the second elastic member (500) is provided between the abutting surface (22171) and a side of the second end of the limiting groove (2227) facing the slide rail (400), and the second elastic member (500) biases the abutting surface (22171) toward the locking position.

Images